JP3848664B2 - Transmission system, transmission method, terminal, transmission right management device, program, and recording medium - Google Patents

Description

  The present invention relates to a transmission system, a transmission method, a terminal, and a transmission right management apparatus that perform demand assignment TDMA (Demand Assignment Time Division Multiple Access) communication. For example, a transmission system, a transmission method, and a terminal used in the transmission system, which share a transmission band of a LAN system or the like, and have a transmission right management device for managing transmission rights for the terminal, and transmission right management It relates to the device.

  Hereinafter, an embodiment of a transmission system for performing conventional demand assignment TDMA communication will be described with reference to the drawings.

  Demand-assigned TDMA communication is widely known as a communication method in which a transmission path is divided in time to form a transmission time slot and each time slot is assigned to a plurality of terminals. In this communication method, a TDMA frame, which is a basic period of a transmission path, is divided in time into a number of time slots, and each terminal transmits information to a partner terminal using one of these time slots. The partner terminal selects a time slot addressed to itself from among a number of time slots and receives information.

  In TDMA communication, when a plurality of terminals simultaneously use the same time slot, a plurality of signals collide with each other and correct transmission cannot be performed. For this reason, it is necessary to prevent a time slot in use by any one terminal from being used by another terminal. In demand assignment TDMA communication, as a countermeasure, an empty slot is selected and assigned to each terminal each time a call is made (see, for example, Patent Document 1).

  FIG. 22 is a configuration block diagram of a conventional LAN system using demand-assigned TDMA communication.

  The LAN system in FIG. 22 includes terminals 2111 to 211n, a transmission right management device 212, and a coaxial transmission line 213 that uses a single frequency band connecting the terminals 2111 to 211n and the transmission right management device 212.

  The terminals 2111 to 211n respectively receive other terminals 2111 to 211n and signals from the transmission right management device 212 from the coaxial transmission line 213, and other terminals 2111 to 211n and transmission right management devices to the coaxial transmission line 213. A transmission unit 2142 that transmits a signal to 212, a transmission request generation unit 2143 that generates transmission request information from transmission destination information and transmission source information, and transmission / reception transmission that controls transmission / reception of transmission information by transmission right information received by the reception unit 2141 A control unit 2144 is provided.

  The transmission right management device 212 includes a receiving unit 2151 that receives signals from the terminals 2111 to 211n from the coaxial transmission line 213, a transmission unit 2152 that transmits signals to the terminals 2111 to 211n to the coaxial transmission line 213, and a receiving unit 2151. The transmission request information of the terminals 2111 to 211n is extracted from the received signal and assigned by the transmission right allocation processing unit 2153 and the transmission right allocation processing unit 2153 that process transmission right allocation from the terminal information of the transmission destination and the terminal information of the transmission source. A transmission right information generation unit 2154 is provided that generates transmission right information from the transmission right to the terminals 2111 to 211n that have requested the transmission right.

  FIG. 23 is a time frame of the LAN system shown in FIG.

  The time frame includes frames of a transmission request period 221 in which the terminal transmits a transmission request, a transmission right notification period 222 in which transmission right information assigned by the transmission right management apparatus is transmitted, and an information transmission period 223 in which the terminal transmits information. Is done. An information transmission period with another terminal assigned to one terminal constitutes one frame, and the information transmission period 223 is composed of a plurality of frames indicating the information transmission period in each terminal. Here, it is assumed that a frame indicating an information transmission period between the terminal 2111 and the terminal 2112 assigned to the terminal 2111 is 224.

  FIG. 24 shows a configuration of transmission request information of the LAN system shown in FIG.

  The transmission request information includes transmission destination terminal information 231 (terminal ID and the like) and transmission source terminal information 232 (terminal ID and the like).

  FIG. 25 shows a configuration of transmission right information of the LAN system shown in FIG.

  The transmission right information includes, for each terminal, transmission destination terminal information 241 (terminal ID and the like) of the assigned transmission right, transmission source terminal information 242 (terminal ID and the like) of the assigned transmission right, and an assigned transmission period. The information 243 is composed of a plurality of combinations.

  Next, operations in the terminals 2111 to 211n and the transmission right management apparatus 212 when transmission is performed from the terminal 2111 to the terminal 2112 in the LAN system illustrated in FIG.

  The terminal 2111 is transmitted by the transmission request generation unit 2143 from the transmission destination terminal information 231 (terminal ID and the like) of the terminal 2112 as the transmission destination and the transmission source terminal information 232 (terminal ID and the like) of the own terminal 2111 as the transmission source. Generate request information. Then, in the transmission request period 221, the transmission unit 2142 transmits the transmission request information to the transmission right management device 212 through the coaxial transmission line 213.

  The transmission right management device 212 receives transmission information from the coaxial transmission line 213 at the reception unit 2151. Then, the transmission right allocation processing unit 2153 extracts the transmission request information from the transmission information received in the transmission request period 221, and transmits the destination terminal information 231 (in this case, the terminal 2112) and the transmission source terminal information 232 (in this case, the terminal 2111) to the terminal 2111 is assigned. Similarly, the transmission right assignment processing unit 2153 performs transmission right assignment processing between other terminals (between the terminals 2111 to 211n and the terminals 2111 to 211n other than the own terminal).

  Then, in the transmission right information generation unit 2154, from the transmission right assigned by the transmission right assignment processing unit 2153, to terminals 2111 to 211n configured by transmission destination terminal information 241, transmission source terminal information 242, and transmission period information 243. Transmission right information (see FIG. 25). Then, the transmission unit 2152 transmits the transmission right information to the terminals 2111 to 211n through the coaxial transmission line 213 during the transmission right notification period 222.

  In the transmission right notification period 222, the terminal 2111 receives the transmission right information from the coaxial transmission line 213 by the reception unit 2141. Then, in the information transmission period 224 between the terminal 2111 and the terminal 2112 in the information transmission period 223 assigned by the transmission destination terminal information 241, the transmission source terminal information 242, and the transmission period information 243, the transmission unit 2142 is connected to the coaxial transmission line. The transmission / reception transmission control unit 2144 controls to transmit the transmission information to the terminal 2112 through 213.

  On the other hand, the terminal 2112 receives the transmission right information from the coaxial transmission line 213 by the reception unit 2141 during the transmission right notification period 222. The receiving unit 2141 receives information from the terminal 2111 during the information transmission period 224 between the terminal 2111 and the terminal 2112 in the information transmission period 223 assigned by the transmission destination terminal information 241, transmission source terminal information 242, and transmission period information 243. The transmission / reception transmission control unit 2144 controls to receive the transmission information.

In this way, the terminals 2111 to 211n transmit a transmission request to the transmission right management device 212, and the transmission right management device 212 assigns the transmission right, whereby information can be transmitted between the terminals.
JP-A-2-183644

  However, the conventional transmission control method described above cannot perform efficient transmission as a whole system when the state of the transmission path differs between terminals. For example, considering the case where transmission of the same capacity data is started simultaneously between terminals having a good transmission path condition and a high transmission speed and between terminals having a poor transmission line condition and a low transmission speed, the transmission speed is high. Of the time allotted between the terminals, the time after the data transfer is completed is not used for communication, so that the entire system is wasted time not used for communication.

  In particular, in the case of a network using coaxial cables configured to include a distributor, the amount of attenuation is very large through the distributor, so the state of the transmission path for each terminal also varies greatly. Therefore, there is a great influence due to the difference in the state of the transmission path between terminals, and if processing is performed without considering the state of the transmission path, the transmission efficiency of the entire system is greatly reduced.

  A typical home is usually equipped with a network of coaxial cables for watching television. If this network can be used, a network environment can be easily and inexpensively constructed. If communication is performed in consideration of the state of the transmission path, the coaxial cable network provided in the general home can be used as a network for transmission between terminals.

  The present invention solves the above-described conventional problems, and enables transmission with high transmission efficiency as a whole transmission system, transmission system, transmission method, terminal, and transmission right even if the state of the transmission path between terminals is different. An object is to provide a management apparatus.

In order to solve the above-described problem, the first aspect of the present invention provides:
Multiple terminals that send and receive signals;
A transmission right management device for managing and assigning a time zone for transmitting and receiving signals between the terminals;
In a transmission system comprising a transmission path for communicating each of the plurality of terminals and the transmission right management device with each other,
Each of the plurality of terminals is
Transmission path information acquisition means for acquiring transmission path information between each other terminal;
Transmission path information transmitting means for transmitting the acquired transmission path information to the transmission right management device,
The transmission right management device includes:
Transmission path information receiving means for receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
The transmission system includes transmission right information transmitting means for transmitting the time zone allocation result to each of the plurality of terminals.

The second aspect of the present invention
The transmission line information is the transmission system according to the first aspect of the present invention, which is information relating to transmission conditions when communicating with the other terminal and a transmission path state corresponding thereto.

The third aspect of the present invention provides
When there are a plurality of types of transmission conditions, the transmission right management device is the transmission system according to the second aspect of the present invention, which allocates the time zone and also determines the transmission conditions.

The fourth invention relates to
The transmission condition is the transmission system according to the third aspect of the present invention, which is a frequency band and / or a modulation method and a transmission bandwidth.

The fifth aspect of the present invention relates to
The transmission path state is the transmission system according to the second aspect of the present invention, which is a transmission rate and / or a transmission error rate.

The sixth invention relates to
The transmission path state is a transmission speed,
The transmission right information processing means is the transmission system according to the second aspect of the present invention, which considers the transmission speed and allocates a lot of time periods for transmission and reception for communication between terminals having a low transmission speed.

The seventh invention relates to
Each of the plurality of terminals also transmits the transmission data capacity to be transmitted to the destination terminal in addition to the transmission path information,
The transmission right management device is the transmission system according to the first aspect of the present invention, which further allocates the time zone in consideration of the capacity.

The eighth invention relates to
The transmission path information is a transmission speed,
In the transmission system according to the seventh aspect of the present invention, the transmission right information processing means allocates a large time zone for transmission and reception to communication whose transmission data transmission between terminals is late in consideration of the transmission speed and the capacity. is there.

The ninth invention relates to
The transmission path information is the transmission system according to the first aspect of the present invention, which is a time required for transmitting transmission data to be transmitted to a transmission destination terminal to the transmission destination terminal.

The tenth aspect of the present invention is
Each of the plurality of terminals is the transmission system according to the first aspect of the present invention, which acquires and updates transmission path information with each other terminal at regular intervals.

The eleventh aspect of the present invention is
Each of the plurality of terminals is the transmission system according to the third aspect of the present invention, which transmits only the transmission path information under a transmission condition desired in communication with the other terminal to the management apparatus.

The twelfth aspect of the present invention is
Each of the plurality of terminals gives a priority to each of the plurality of transmission path information and transmits,
The transmission right management device is a transmission system according to a third aspect of the present invention that further assigns the time zone and determines transmission conditions in consideration of the priority.

The thirteenth aspect of the present invention is
The transmission of the twelfth aspect of the present invention, wherein each of the plurality of terminals gives a high priority to a frequency band and / or modulation scheme and transmission bandwidth desired to be preferentially used for communication between specific terminals. System.

The fourteenth aspect of the present invention is
The transmission right management device further includes transmission path information update request means for requesting each of the plurality of terminals to update the transmission path status via the transmission path. It is.

The fifteenth aspect of the present invention is
Each of the plurality of terminals is the transmission system according to the first aspect of the present invention, which transmits the transmission path information when requesting the transmission right management apparatus to allocate a communication time.

The sixteenth aspect of the present invention
Each of the plurality of terminals is the transmission system according to the first aspect of the present invention, wherein the transmission path information is transmitted in advance before requesting the transmission right management apparatus to allocate a communication time.

The seventeenth aspect of the present invention provides
Each of the plurality of terminals is the transmission system according to the first aspect of the present invention, which acquires the transmission path information when requesting the transmission right management apparatus to allocate a communication time.

The eighteenth aspect of the present invention is
The transmission line is the transmission system according to the first aspect of the present invention, comprising a plurality of coaxial cables and a distributor for branching a signal of one coaxial cable into signals of another plurality of coaxial cables.

The nineteenth aspect of the present invention provides
Multiple terminals that send and receive signals;
A transmission right management device for managing and assigning a time zone for transmitting and receiving signals between the terminals;
In a transmission method of a transmission system comprising a transmission path for communicating each of the plurality of terminals and the transmission right management device with each other,
The plurality of terminals are:
Obtaining transmission path information with each other terminal;
Transmitting the acquired transmission path information to the transmission right management device,
The transmission right management device includes:
Receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, assigning a time zone for transmitting and receiving signals between the terminals,
Transmitting the time slot allocation result to each of the plurality of terminals.

The twentieth aspect of the present invention is
Each of the plurality of terminals of the transmission system of the first aspect of the present invention,
The transmission path information acquisition means for acquiring transmission path information between each other terminal;
And a program for causing a computer to function as the transmission path information transmitting means for transmitting the acquired transmission path information to the transmission right management device.

The twenty-first aspect of the present invention
A recording medium carrying the program of the twentieth aspect of the present invention, which is a recording medium usable by a computer.

The twenty-second invention relates to
Of the transmission right management device of the transmission system of the first aspect of the present invention,
The transmission path information receiving means for receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, the transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
It is a program for causing a computer to function as the transmission right information transmitting means for transmitting the time zone allocation result to each of the plurality of terminals.

The twenty-third invention provides
A recording medium carrying the program of the twenty-second aspect of the present invention, which can be used by a computer.

The twenty-fourth aspect of the present invention
In the transmission system of the first aspect of the present invention,
Transmission path information acquisition means for acquiring transmission path information between each other terminal;
It is a terminal comprising transmission path information transmission means for transmitting the acquired transmission path information to a transmission right management device.

According to a twenty-fifth aspect of the present invention,
In the transmission system of the first aspect of the present invention,
Transmission path information receiving means for receiving transmission path information from each of a plurality of terminals;
In consideration of the transmission path information, transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
A transmission right management device comprising: transmission right information transmission means for transmitting the time zone allocation result to each of the plurality of terminals.

  According to the present invention, it is possible to provide a transmission system, a transmission method, a terminal, and a transmission right management device that can perform communication with high transmission efficiency as a whole transmission system even if the state of the transmission path between terminals differs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, in order to facilitate understanding of the transmission system of the present invention, features of the present invention will be described. FIG. 1 is a schematic block diagram of a transmission system for explaining the features of the present invention.

  In the transmission system shown in FIG. 1, a plurality of terminals 310 to 31n and a transmission right management device 320 are connected to a transmission path 340. Each terminal 310 to 31n requests a time for communication with the other terminals 310 to 31n from the transmission right management device 320, and the transmission right management device 320 allocates a time zone for communication between the terminals. Then, the allocated time zone (transmission right) is notified to each of the terminals 310 to 31n. And each terminal 310-31n communicates with another terminal in the allocated time slot | zone.

  The above configuration and operation are the configuration and operation of a transmission system that performs general demand assignment TDMA communication. In the transmission system of the present invention, each of the terminals 310 to 31n and the transmission right management device 320 has the following characteristics. It has a special means.

  As characteristic means, each of the terminals 310 to 31n includes a transmission path information acquisition unit 331 and a transmission path information transmission unit 332, respectively. The transmission right management device 320 includes a transmission path information receiving unit 321, a transmission right allocation processing unit 322, and a transmission right information transmission unit 323.

  The transmission path information acquisition unit 331 of each terminal 310 to 31n acquires transmission path information for each of the other terminals 310 to 31n via the transmission path 340. The transmission path information is information indicating the state and performance of the transmission path between the other terminals 310 to 31n. Then, the transmission path information transmission means 332 transmits this transmission path information to the transmission right management device 320.

  In the transmission right management device 320, the transmission path information receiving unit 321 receives the transmission path information transmitted from each of the terminals 310 to 31n. Then, based on the transmission path information from each of the terminals 310 to 31n, a time zone for communication between the terminals is assigned. And the transmission right information transmission means 323 transmits the information of the allocated time slot | zone to each terminal 310-31n.

  The transmission system of the present invention is characterized in that each terminal 310 to 31n acquires transmission path information for each terminal and transmits it to the transmission right management device 320, and the transmission right management device 320 includes each terminal 310 to 31n. The time zone for communication between the terminals is assigned based on the transmission path information received from.

  Hereinafter, specific embodiments of the transmission system of the present invention will be described.

(Embodiment 1)
FIG. 2 is a block diagram showing the configuration of the coaxial transmission system according to Embodiment 1 of the present invention.

  The coaxial transmission system according to the first embodiment includes terminals 111 to 11n, a transmission right management device 12, and a coaxial transmission line 13 that uses a single frequency band connecting the terminals 111 to 11n and the transmission right management device 12. ing. Note that the terminals 111 to 11n indicate two or more terminals having the same configuration, and the number of terminals is not particularly limited.

  Here, the coaxial transmission line 13 is a coaxial cable network installed in a general household and installed for television. Therefore, the terminals 111 to 11n and the transmission right management device 12 are connected to the coaxial cable via the distributor.

  Each of the terminals 111 to 11n receives a signal from the other terminals 111 to 11n and the transmission right management device 12 from the coaxial transmission line 13, and the other terminals 111 to 11n and the transmission right management device to the coaxial transmission line 13. The transmission path state is transmitted to the transmission section 142 for transmitting a signal to 12, the transmission path state inspection section 143 for inspecting the transmission path state with other terminals 111 to 11n other than the own terminal, and the transmission path state inspection section 143. Transmission path state inspection control unit 144 for instructing inspection, transmission path state holding unit 145 for holding result information of the transmission path state inspected by transmission path state inspection unit 143, transmission destination information, transmission source information, and transmission path state holding A transmission request generation unit 146 that generates transmission request information from transmission path state information with a transmission destination terminal held by the unit 145, and an allocation time acquisition unit 14 that acquires transmission right information using the reception unit 141. , And a transceiver transmission control unit 147 for controlling the transmission and reception of transmission information based on the acquired transmission right information at allocation time acquisition unit 148.

  A combination of the transmission path state inspection unit 143, the reception unit 141, and the transmission unit 142 is an example of the transmission path information acquisition unit of the present invention. A combination of the transmission request generation unit 146 and the transmission unit 142 is an example of the transmission path information transmission unit of the present invention. The transmission right information is an example of a result of assigning a time zone for transmission / reception between terminals according to the present invention. Further, the transmission path state information is an example of the transmission path information of the present invention.

  The transmission right management device 12 includes a reception unit 151 that receives signals from the terminals 111 to 11n from the coaxial transmission line 13, a transmission unit 152 that transmits signals to the terminals 111 to 11n to the coaxial transmission line 13, and a reception unit 151. Transmission right allocation processing for extracting transmission request information of the terminals 111 to 11n from the received signal and processing transmission right allocation from transmission destination state information, transmission source state information between the transmission destination terminal information and the transmission destination terminal 153 and a transmission right information generation unit 154 that generates transmission right information to the terminals 111 to 11n that have requested the transmission right from the transmission right assigned by the transmission right assignment processing unit 153.

  The receiving unit 151 is an example of the transmission path information receiving unit of the present invention. The transmission right assignment processing unit 153 is an example of the transmission right assignment processing means of the present invention. A combination of the transmission right information generation unit 154 and the transmission unit 152 is an example of the transmission right information transmission unit of the present invention.

  In addition, the instruction | indication which makes the transmission line state inspection part 143 test | inspect a transmission line state from the transmission line state inspection control part 144 may be repeatedly instructed at a fixed interval, and may be instructed irregularly.

  FIG. 3 is a time frame of the coaxial transmission system according to the first embodiment.

  The time frame of the first embodiment includes a transmission path inspection period 21 in which a transmission path state between terminals is inspected, a transmission request period 22 in which a terminal transmits a transmission request, and transmission right information assigned by the transmission right management apparatus 12. Each frame is composed of a transmission right notification period 23 for transmission and an information transmission period 24 for transmitting information by the terminal. An information transmission period with another terminal assigned to one terminal constitutes one frame, and the information transmission period 24 is composed of a plurality of frames indicating the information transmission period in each terminal. 25 frames in the information transmission period 24 are frames indicating an information transmission period between the terminal 111 and the terminal 112 allocated to the terminal 111.

  FIG. 4 shows a configuration of transmission request information of the coaxial transmission system according to the first embodiment.

  The transmission request information includes transmission destination terminal information 31 (terminal ID and the like), transmission source terminal information 32 (terminal ID and the like), and transmission path information 33 between the transmission source and the transmission destination.

  FIG. 5 shows a configuration of transmission right information of the coaxial transmission system according to the first embodiment.

  The transmission right information includes, for each terminal, transmission destination terminal information 41 (terminal ID and the like) of the assigned transmission right, transmission source terminal information 42 (terminal ID and the like) of the assigned transmission right, and an assigned transmission period. The information 43 is composed of a plurality of combinations.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the first embodiment will be described.

  The attenuation amount of the network using the coaxial cable becomes very large by passing through the distributor. And between terminals with a large amount of attenuation, the transmission quality differs depending on the modulation method, and the conditions for good transmission quality differ between terminals. Similarly, the transmission quality differs depending on the frequency band, the conditions of the frequency band with good transmission quality differ between terminals, and the transmission quality is not necessarily improved as the frequency band is lower.

  Therefore, since the transmission path state of the used frequency band between the terminals differs, the amount of transmission that can be transmitted in the transmittable period assigned by the transmission right management device 12 increases or decreases. In this case, transmission cannot be performed. Even when the transmission right management device 12 efficiently allocates a transmission period to each terminal, efficient communication cannot actually be performed depending on the condition of the transmission path.

  Therefore, in the coaxial transmission system of the first embodiment, for each terminal, the transmission path state is inspected and transmission path information is transmitted to the transmission right management apparatus 12, and the transmission right management apparatus 12 transmits the transmission path information. Considering this, by assigning a time zone for communication between terminals, the entire system can perform transmission with high transmission efficiency.

  The terminal 111 first checks the transmission path state in order to hold transmission path state information with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also check the transmission path state in order to hold transmission path state information with other terminals.

  The transmission line state inspection unit 143 of the terminal 111 receives the inspection information with the highest modulation efficiency (modulation method and transmission bandwidth) in the transmission line inspection period 21 according to the instruction of the transmission line state inspection control unit 144. Through the transmission unit 142 to the terminals 112 to 11n.

  On the other hand, in the terminals 112 to 11 n, the reception unit 141 receives inspection information from the coaxial transmission line 13 during the transmission line inspection period 21. Then, the transmission path state inspection unit 143 checks whether there is an error in the received information. If there is no error in the information, “inspection complete” information is displayed. If there is an error in the information, “inspection incomplete” information is displayed. Is transmitted from the transmission unit 142 to the terminal 111 as inspection result information.

  Next, the terminal 111 receives the inspection result information from the terminals 112 to 11n by the receiving unit 141. When the inspection result information is “inspection complete”, the transmission path state holding unit 145 holds the modulation efficiency at the time when the inspection is completed as transmission line state information. When the inspection result information is “inspection incomplete”, the transmission line state inspection unit 143 transmits inspection information with reduced modulation efficiency from the transmission unit 142 to the terminals 112 to 11 n according to an instruction from the transmission line state inspection control unit 144. . This inspection operation is repeated until “inspection complete” inspection result information is received.

  Note that the above inspection method is an example, and any method can be used as long as appropriate modulation efficiency can be detected. In the above inspection method, the transmission path information is defined as the modulation efficiency. However, the transmission speed per unit time may be used as long as the information can express the transmission path state. The combination of the modulation method and the transmission bandwidth is an example of the transmission condition of the present invention.

  Next, in the transmission request generation unit 146, the terminal 111 transmits the transmission destination terminal information 31 (terminal ID and the like) of the terminal 112 that is the transmission destination and the transmission source terminal information 32 (terminal ID and the like) of the terminal 111 that is the transmission source. ) And the transmission path information 33 between the terminal 112 held by the transmission path status holding unit 145 and the transmission request information. Here, as the transmission path information 33, information on the transmission path state between the terminal 112 held by the transmission path state holding unit 145, that is, the modulation efficiency obtained by the above-described inspection is used. Then, the transmission unit 142 transmits the transmission request information to the transmission right management device 12 through the coaxial transmission line 13 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 13 at the reception unit 151. Then, the transmission right allocation processing unit 153 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and transmission path information 33, transmission right allocation processing to terminals 111 to 11n (in this case, terminal 111) is performed. Then, in the transmission right information generation unit 154, from the transmission right assigned by the transmission right assignment processing unit 153, to the terminals 111 to 11n configured by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43 Transmission right information (see FIG. 5) is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 13 during the transmission right notification period 23.

  Here, in consideration of the transmission path information 33, the transmission right assignment processing unit 153 performs transmission right assignment processing to the terminals 111 to 11n, that is, communication time zone assignment processing between the terminals. For example, when the transmission path information 33 is a transmission rate, more time zones are allocated to communication between terminals having a low transmission rate than communication between terminals having a high transmission rate.

  In the conventional transmission system that performs TDMA communication, the time zone for communication between terminals is assigned regardless of the transmission speed for each terminal. The time after transfer is not used for communication and is wasted. The coaxial transmission system of the first embodiment can increase the transmission efficiency of the entire system by allocating a time that is not used for this communication and is wasted as a time for a communication with a low transmission speed.

  For example, when the transmission rate between the terminals 111 and 112 is 100 Mbps and the transmission rate between the terminals 113 and 114 is 50 Mbps, a transmission system that performs conventional TDMA communication allocates the same time for these two communications. On the other hand, in the coaxial transmission system according to the first embodiment, a time twice as long as the time allocated for the communication between the terminals 111-112 is allocated to the communication between the terminals 113-114.

  In the terminal 111, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. Control is performed so that transmission information is transmitted from the transmission unit 142 to the terminal 112 through the coaxial transmission line 13 during the information transmission period 25 between the terminal 111 and the terminal 112.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. In the information transmission period 25 between the terminal 111 and the terminal 112, the receiving unit 141 performs control so that transmission information from the terminal 111 is received.

  In the first embodiment, the transmission line state inspection control unit 144 that instructs the transmission line state inspection unit 143 to inspect the transmission line state is provided in the terminals 111 to 11n. The coaxial transmission path 13 may be used to instruct the transmission path state inspection unit 143 of the terminals 111 to 11n to inspect the transmission path state. In this case, the transmission path state inspection control unit arranged in the transmission right management apparatus 12 is an example of a transmission path information update request unit of the present invention.

  In addition, when transmitting the transmission request information to the transmission right management device 12, each of the terminals 111 to 11n causes the transmission line state inspection unit 143 to check the transmission line state with the transmission destination terminal that requests transmission, The inspection result may be the inter-terminal transmission path information 33 of the transmission request information, and the transmission request information may be transmitted.

  As described above, in the coaxial transmission system according to the first embodiment, the state of the transmission path of the used frequency band is inspected between terminals, the terminal holds the inspection result, adds it to the transmission request, and transmits it to the transmission right management apparatus. Then, the transmission right management device considers the transmission path state between the terminals based on the inspection result, and assigns the transmission right, thereby enabling communication with high transmission efficiency corresponding to the transmission path state between the terminals.

  Further, the transmission capacity requested by the terminal is added to the transmission request information generated by the transmission request generation unit 146 of the terminals 111 to 11n, and transmitted to the transmission right management device 12, and the transmission right allocation processing unit 153 of the transmission right management device 12 is transmitted. When the transmission right allocation process is performed in the above, communication with higher transmission efficiency can be performed by determining the allocation period in consideration of the required transmission capacity of the terminal. Here, the transmission capacity requested by the terminal for the transmission request information is an example of the capacity of transmission data to be transmitted to the destination terminal of the present invention.

  Here, the transmission right allocation processing unit 153 also considers the transmission capacity requested by the terminal, for example, by calculating the time when transmission data transmission between the terminals ends from the transmission speed and the transmission capacity, and between each terminal Time is allocated to communication between each terminal so that transmission of each transmission data ends at the same time. By assigning the communication time zone in this way, more efficient transmission can be performed as the entire system.

(Embodiment 2)
FIG. 6 is a configuration block diagram of the coaxial transmission system according to the second embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 1, and the description is abbreviate | omitted.

  In addition to the configuration of the terminal of the first embodiment, each of the terminals 111 to 11n transmits the transmission data from the transmission data capacity and the transmission path state information between the transmission destination terminal held by the transmission path state holding unit 145. A transmission period information generation unit 511 that generates request period information is provided. Then, the transmission request generation unit 512 generates transmission request information from the transmission destination information, the transmission source information, and the transmission request period information generated by the transmission period information generation unit 511. The transmission request period information generated here is an example of the time required for transmitting the transmission data to be transmitted to the destination terminal of the present invention.

  Further, in the transmission right management device 12, the transmission right allocation processing unit 521 extracts the transmission request information from the terminals 111 to 11n from the signal received by the reception unit 151, and transmits the transmission source information, the transmission destination information, and the transmission request period information. The transmission right assignment is processed from the above.

  The time frame of the coaxial transmission system of the second embodiment has the same configuration as the time frame of the first embodiment shown in FIG.

  FIG. 7 shows a configuration of transmission request information of the coaxial transmission system according to the second embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission request information of Embodiment 1, and the description is abbreviate | omitted.

  The transmission request information 61 in FIG. 7 is transmission request period information generated by the transmission period information generation unit 511 from the capacity of transmission data to be transmitted and transmission path state information.

  The transmission right information of the coaxial transmission system of the second embodiment has the same configuration as the transmission right information of the first embodiment shown in FIG.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the second embodiment will be described. The description of the same operation as in the first embodiment is omitted.

  The terminal 111 first checks the transmission path state in order to hold transmission path information with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also check the transmission path state in order to hold transmission path information with other terminals.

  Next, the transmission period information generation unit 511 of the terminal 111 uses the transmission data state between the transmission data capacity to be transmitted to the terminal 112 and the transmission destination terminal 112 held by the transmission line state holding unit 145. The transmission request period information is generated. The transmission request generation unit 512 includes transmission destination terminal information 31 of the terminal 112 that is the transmission destination, transmission source terminal information 32 of the own terminal 111 that is the transmission source, and transmission request period information generated by the transmission period information generation unit 511. From 61, the transmission request information shown in FIG. Then, the transmission unit 142 transmits the transmission request information to the transmission right management device 12 through the coaxial transmission line 13 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 13 at the reception unit 151. Then, the transmission right allocation processing unit 521 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and transmission request period information 61, transmission right allocation processing to terminals 111 to 11n (in this case, terminal 111) is performed. Then, the transmission right information generation unit 154 changes the transmission right assigned by the transmission right assignment processing unit 521 to the terminals 111 to 11n including the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. Transmission right information (see FIG. 5) is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 13 during the transmission right notification period 23.

  Here, in consideration of the transmission request period information 61, the transmission right allocation processing unit 521 performs a transmission right allocation process to the terminals 111 to 11n, that is, a communication time zone allocation process between the terminals. For example, more time zones are allocated to communication between terminals with a long transmission request period than between other terminals.

  For example, if the transmission request period between the terminals 111 and 112 is 5 seconds and the transmission request period between the terminals 113 and 114 is 10 seconds, the transmission system that performs the conventional TDMA communication has these two communications. In the coaxial transmission system according to the second embodiment, twice the time allocated for communication between terminals 111-112 is allocated for communication between terminals 113-114. To do. By doing in this way, the transmission efficiency as the whole system can be raised, and the transmission of the transmission data between the terminals 113-114 can be completed quickly.

  In the terminal 111, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. Control is performed so that transmission information is transmitted from the transmission unit 142 to the terminal 112 through the coaxial transmission line 13 during the information transmission period 25 between the terminal 111 and the terminal 112.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. In the information transmission period 25 between the terminal 111 and the terminal 112, the receiving unit 141 performs control so that transmission information from the terminal 111 is received.

  As described above, in the coaxial transmission system according to the second embodiment, the transmission path state of the used frequency band is inspected between the terminals, the terminals hold the inspection results, and the transmission period information is obtained from the inspection results and the transmission data capacity. Is transmitted to the transmission right management device. Then, the transmission right assignment processing unit of the transmission right management device determines the assignment period in consideration of the transmission request period generated from the inspection result of the transmission path state between the terminals when performing the transmission right assignment process. As a result, transmission right allocation processing is optimized, and communication with high transmission efficiency can be performed.

(Embodiment 3)
FIG. 8 is a block diagram showing the configuration of the coaxial transmission system according to the third embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 1, and the description is abbreviate | omitted.

  Each of the terminals 111 to 11n generates transmission line information from the transmission line state checked by the transmission line state inspection unit 143 instead of the transmission line state holding unit 145 having the terminal configuration of the first embodiment. Part 711 is provided. And the transmission request production | generation part 712 produces | generates transmission request information from transmission source information and transmission destination information.

  In addition to the configuration of the transmission right management apparatus of the first embodiment, the transmission right management apparatus 12 holds transmission path state for holding transmission path information with other terminals transmitted from the terminals 111 to 11n. Part 721 is provided. Then, the transmission right allocation processing unit 722 processes transmission right allocation based on transmission destination terminal information, transmission source terminal information, and transmission path information between terminals held in the transmission path state holding unit 721. Yes.

  FIG. 9 is a time frame of the coaxial transmission system according to the third embodiment. In addition, the same number is attached | subjected to the same frame part as the time frame of Embodiment 1, and the description is abbreviate | omitted.

  The frame 81 in FIG. 9 is a transmission path information transmission period for transmitting inter-terminal transmission path information including transmission path information with other terminals generated by the terminals 111 to 11n.

  FIG. 10 shows the configuration of the inter-terminal transmission path information in the coaxial transmission system according to the third embodiment.

The transmission path information includes transmission destination terminal information 91 (terminal ID, etc.), transmission source terminal information 92 (terminal ID).
), And transmission path information 93 between the transmission source and transmission destination terminals.

  FIG. 11 shows a configuration of transmission request information of the coaxial transmission system according to the third embodiment.

  The transmission request information includes transmission destination terminal information 31 (terminal ID and the like) and transmission source terminal information 32 (terminal ID and the like).

  The transmission right information of the coaxial transmission system of the third embodiment has the same configuration as the transmission right information of the first embodiment shown in FIG.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the third embodiment will be described. The description of the same operation as in the first embodiment is omitted.

  The terminal 111 first checks the transmission path state in order to hold transmission path state information with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also check the transmission path state in order to hold transmission path state information with other terminals.

  Then, the transmission path information generation unit 711 of the terminals 111 to 11n acquires the inspection result in the transmission path state inspection unit 143 from the transmission path state inspection control unit 144, and transmits destination terminal information 91, transmission source terminal information 92, and Then, inter-terminal transmission path information composed of transmission path information 93 between the transmission source and transmission destination terminals is generated. Then, the transmission unit 142 transmits the inter-terminal transmission path information generated by the transmission path information generation unit 711 to the transmission right management device 12 through the coaxial transmission path 13 during the transmission path information transmission period 81.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 13 in the transmission line information transmission period 81 at the reception unit 151. Then, the transmission path state holding unit 721 extracts the inter-terminal transmission path information from the transmission information received in the transmission path information transmission period 81 and holds it.

  Next, in the transmission request generation unit 712, the terminal 111 generates transmission request information from the transmission destination terminal information 31 of the terminal 112 that is the transmission destination and the transmission source terminal information 32 of the own terminal 111 that is the transmission source. Then, the transmission unit 142 transmits this transmission request information to the transmission right management device 12 through the coaxial transmission line 13 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 13 in the transmission request period 22 at the reception unit 151. Then, the transmission right allocation processing unit 722 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and transmission path information held by the transmission path information holding unit 721, transmission right allocation processing to the terminals 111 to 11n (in this case, the terminal 111) is performed.

  Then, the transmission right information generation unit 154 changes the transmission right assigned by the transmission right assignment processing unit 722 to the terminals 111 to 11n configured by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The transmission right information is generated. Then, the transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 13 during the transmission right notification period 23.

  In the terminal 111, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. Control is performed so that transmission information is transmitted from the transmission unit 142 to the terminal 112 through the coaxial transmission line 13 during the information transmission period 25 between the terminal 111 and the terminal 112.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 13 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 147, and the transmission / reception transmission control unit 147 transmits the terminals within the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. In the information transmission period 25 between the terminal 111 and the terminal 112, the receiving unit 141 performs control so that transmission information from the terminal 111 is received.

  As described above, in the coaxial transmission system according to the third embodiment, the transmission path state of the used frequency band is inspected between terminals, the inspection result is transmitted to the transmission right management apparatus in advance, and the inspection result is transmitted to the transmission right. Hold in the management device. When receiving a transmission request from a terminal, it is possible to perform transmission right allocation processing considering the transmission line state between terminals, so without adding transmission line state information every time a transmission request occurs Therefore, the amount of transmission request information can be reduced, and communication with high transmission efficiency can be performed.

(Embodiment 4)
FIG. 12 is a block diagram showing the configuration of the coaxial transmission system according to the fourth embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 1, and the description is abbreviate | omitted.

  Unlike the coaxial transmission line 13 in the first embodiment that uses a single frequency band, the coaxial transmission line 1101 that connects the terminals 111 to 11n and the transmission right management device 12 is a transmission that uses a plurality of frequency bands. Road. Here, the coaxial transmission line 1101 uses a network of coaxial cables installed in a household and installed for television. Therefore, the terminals 111 to 11n and the transmission right management device 12 are connected to the coaxial cable via the distributor.

  Each of the terminals 111 to 11n has the same configuration as that of the terminal of the first embodiment, but the transmission path state holding unit 11021 holds transmission path state information of a plurality of frequency bands checked by the transmission path state inspection unit 143. It is supposed to be. Further, the transmission request generation unit 11022 transmits transmission request information from a plurality of transmission path state information between the transmission destination terminal information, the transmission source terminal information, and the transmission destination state terminal held by the transmission path state holding unit 11021. Is supposed to generate. In addition, the transmission / reception transmission control unit 247 includes a frequency setting unit 11023 that sets the frequency of the reception unit 141 and the transmission unit 142 in the allocated frequency band included in the transmission right information acquired by the allocation time acquisition unit 148. Note that transmission path states in a plurality of frequency bands are an example of a plurality of types of transmission conditions according to the present invention.

  Further, in the transmission right management device 12, the transmission right allocation processing unit 11031 extracts the transmission request information from the terminals 111 to 11n from the transmission information received by the reception unit 151, the terminal information of the transmission destination and the terminal information of the transmission source The transmission right (allocation frequency band and allocation period) is allocated from a plurality of pieces of transmission path information between the transmission destination and the transmission destination terminal. Also, the transmission right information generation unit 11032 generates transmission right information to the terminals 111 to 11n that requested the transmission right from the transmission right information assigned by the transmission right assignment processing unit 11031.

  The time frame of the coaxial transmission system of the fourth embodiment has the same configuration as the time frame of the first embodiment shown in FIG.

  FIG. 13 shows a configuration of transmission request information of the coaxial transmission system according to the fourth embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission request information of Embodiment 1, and the description is abbreviate | omitted.

  The transmission request information 1201 to 120m is transmission path information for each frequency band between the transmission source and transmission destination terminals.

  FIG. 14 shows transmission right information of the coaxial transmission system according to the fourth embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission right information of Embodiment 1, and the description is abbreviate | omitted.

  Transmission right information 1301 is allocated frequency band information.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the fourth embodiment will be described. The description of the same operation as in the first embodiment is omitted.

  The terminal 111 first checks the transmission path state for each frequency band in order to hold transmission path state information for each frequency band in the coaxial transmission path 1101 with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also inspect the transmission line state in order to hold transmission line state information for each frequency band in the coaxial transmission line 1101 with other terminals.

  Next, the transmission request generation unit 11022 of the terminal 111 is held by the transmission destination terminal information 31 of the terminal 112 that is the transmission destination, the transmission source terminal information 32 of the own terminal 111 that is the transmission source, and the transmission path state holding unit 11021. Transmission request information as shown in FIG. 13 is generated from the transmission path information 1201 to 120m for each frequency band with the terminal 112. Then, the transmission unit 142 transmits the transmission request information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission right allocation processing unit 11031 extracts the transmission request information from the transmission information received during the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal). 111) and transmission path information 1201 to 120m, transmission right allocation processing to terminals 111 to 11n (in this case, terminal 111) is performed. In this allocation process, a frequency band used for communication between terminals and a time zone for communication are allocated.

  Here, the transmission right allocation processing unit 11031 performs transmission right allocation processing to the terminals 111 to 11n in consideration of the transmission path information 1201 to 120m.

  For example, when the transmission speed between certain terminals is 100 Mbps for 100 to 150 MHz and 75 Mbps for 200 to 250, the frequency band used between the terminals is determined to be 100 to 150 MHz, and is based on the transmission speed in that frequency band. To perform communication time allocation processing. By doing in this way, the transmission efficiency as the whole system can be raised.

  Then, the transmission right information generation unit 11032 includes transmission destination terminal information 41, transmission source terminal information 42, transmission period information 43, and frequency band information 1301 based on the transmission right assigned by the transmission right assignment processing unit 11031. Transmission right information (see FIG. 14) to the terminals 111 to 11n is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 1101 during the transmission right notification period 23.

  In the terminal 111, the allocated time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the transmission unit 142 so that a signal is transmitted in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the setting of the frequency band of the transmission unit 142 is changed, and transmission information is transmitted in the frequency band set by the frequency setting unit 11023 to the terminal 112 through the coaxial transmission line 1101.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the receiving unit 141 so that the signal is received in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the frequency band setting of the reception unit 141 is changed, and transmission information is received from the terminal 111 through the coaxial transmission line 1101 in the frequency band set by the frequency setting unit 11023.

  As described above, in the coaxial transmission system of the fourth embodiment, the transmission path state for each used frequency band is inspected between terminals, and the terminal holds the inspection result for each used frequency band, and the transmission right is transmitted as transmission path information. Send to the management device. In the transmission right allocation processing unit of the transmission right management apparatus, when performing transmission right allocation processing, the transmission period information for each frequency band used between terminals is taken into consideration, the allocation period and the frequency band used for communication between the terminals. Thus, communication with high transmission efficiency corresponding to the transmission path condition can be performed.

  In the fourth embodiment, the transmission path states in a plurality of used frequency bands are used as a plurality of different transmission specifications, but a plurality of other different transmission specifications such as combinations of a plurality of different modulation schemes and transmission bandwidths. It may be.

  Further, the transmission data capacity to be transmitted is added to the transmission request information generated by the transmission request generation unit 11022 of the terminals 111 to 11n, and the transmission data is transmitted to the transmission right management device 12, and the transmission right allocation processing unit of the transmission right management device 12 is transmitted. When performing transmission right allocation processing at 11031, communication with higher transmission efficiency can be performed by determining the allocation period and frequency in consideration of the capacity of transmission data that the terminal wants to transmit.

(Embodiment 5)
FIG. 15 is a configuration block diagram of the coaxial transmission system according to the fifth embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 4, and the description is abbreviate | omitted.

  In addition to the configuration of the terminal of the fourth embodiment, each of the terminals 111 to 11n has a transmission path for each frequency band between the transmission data capacity to be transmitted and the destination terminal held by the transmission path state holding unit 11021 A transmission period information generation unit 14011 that generates transmission request period information from the state information is provided. The transmission request generation unit 14012 generates transmission request information from transmission destination information, transmission source information, and transmission request period information for each frequency band generated by the transmission period information generation unit 14011. The transmission request period information is an example of the time required for transmission to the transmission destination terminal of the present invention.

  Further, in the transmission right management device 12, the transmission right allocation processing unit 14021 extracts the transmission request information from the terminals 111 to 11n from the signal received by the reception unit 151, and transmits the transmission source information, the transmission destination information, and the frequency band. The transmission right allocation is processed from the transmission request period information.

  The time frame of the coaxial transmission system of the fifth embodiment has the same configuration as the time frame of the first embodiment shown in FIG.

  FIG. 16 shows a configuration of transmission request information of the coaxial transmission system according to the fifth embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission request information of Embodiment 4, and the description is abbreviate | omitted.

  The transmission request information 1501 to 150m is transmission request period information for each frequency band generated from the requested transmission capacity and transmission path information for each frequency band.

  The transmission right information of the coaxial transmission system of the fifth embodiment has the same configuration as the transmission right information of the fourth embodiment shown in FIG.

Next, operations in the terminals 111 to 11n and the transmission right management device 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system of the fifth embodiment will be described. In addition,
The description of the same operation as in the fourth embodiment is omitted.

  The terminal 111 first checks the transmission path state for each frequency band in order to hold transmission path state information for each frequency band of the coaxial transmission path 1101 with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also inspect the transmission path state in order to hold transmission path state information for each frequency band of the coaxial transmission path 1101 with other terminals.

  Next, the transmission period information generation unit 14011 of the terminal 111 determines the transmission data capacity requested and the transmission path state information for each frequency band between the transmission destination terminal 112 held by the transmission path state holding unit 11021. Transmission request period information is generated. The transmission request generation unit 14012 transmits the transmission destination terminal information 31 of the terminal 112 that is the transmission destination, the transmission source terminal information 32 of the own terminal 111 that is the transmission source, and the frequency period generated by the transmission period information generation unit 14011. Transmission request information is generated from the transmission request period information 1501 to 150m. Then, the transmission unit 142 transmits the transmission request information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission right allocation processing unit 14021 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and transmission request period information 1501 to 150m for each frequency band, transmission right allocation processing to terminals 111 to 11n (in this case, terminal 111) is performed. Then, the transmission right information generation unit 11032 determines the transmission destination terminal information 41, the transmission source terminal information 42, the transmission period information 43, and the assigned frequency band information from the transmission right assigned by the transmission right assignment processing unit 14021. Transmission right information (see FIG. 14) to the terminals 111 to 11n configured with 1301 is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 1101 during the transmission right notification period 23.

  In the terminal 111, the allocated time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the transmission unit 142 so that a signal is transmitted in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the setting of the frequency band of the transmission unit 142 is changed, and transmission information is transmitted in the frequency band set by the frequency setting unit 11023 to the terminal 112 through the coaxial transmission line 1101.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the receiving unit 141 so that the signal is received in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the frequency band setting of the reception unit 141 is changed, and transmission information is received from the terminal 111 through the coaxial transmission line 1101 in the frequency band set by the frequency setting unit 11023.

  As described above, in the coaxial transmission system according to the fifth embodiment, the transmission path state for each used frequency band is inspected between terminals, the terminal holds the inspection result, and the inspection result and the capacity of transmission data to be transmitted Transmission period information for each used frequency band is generated and transmitted to the transmission right management device. Then, in the transmission right allocation processing unit of the transmission right management device, when performing the transmission right allocation process, the transmission request period generated from the transmission path state information for each frequency band used between the terminals is considered, and the allocation period and By determining the frequency band to be used for communication between the terminals, transmission right allocation processing is optimized, and communication with high transmission efficiency can be performed.

(Embodiment 6)
FIG. 17 is a configuration block diagram of the coaxial transmission system according to the sixth embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 4, and the description is abbreviate | omitted.

  Each of the terminals 111 to 11n determines a requested transmission path from a plurality of transmission path state information with the transmission destination terminal held by the transmission path state holding unit 11021 in addition to the configuration of the terminal of the fourth embodiment. The transmission transmission line determination unit 1611 is provided. Here, the determined required transmission path is a transmission path condition of desired transmission specifications (a specific frequency band, modulation scheme, transmission bandwidth, etc.) with a specific terminal as a transmission destination. Then, the transmission request generation unit 1612 generates transmission request information from the transmission destination information, the transmission source information, and the request transmission path information determined by the transmission transmission path determination unit 1611. Note that the transmission path information of the requested transmission path determined here is an example of transmission path information in a transmission condition desired in communication with another terminal of the present invention.

  Also, in the transmission right management device 12, the transmission right allocation processing unit 1621 extracts transmission request information from the terminals 111 to 11n from the signal received by the reception unit 151, and transmits destination terminal information, transmission source terminal information, and request transmission. The transmission right allocation (allocation frequency band and allocation period) is processed from the path information.

  The time frame of the coaxial transmission system of the sixth embodiment has the same configuration as the time frame of the first embodiment shown in FIG.

  FIG. 18 shows a configuration of transmission request information of the coaxial transmission system according to the sixth embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission request information of Embodiment 1, and the description is abbreviate | omitted.

  Transmission request information 171 illustrated in FIG. 18 is request transmission path information determined by the transmission transmission path determination unit 1611.

  The transmission right information of the coaxial transmission system of the sixth embodiment has the same configuration as the transmission right information of the fourth embodiment shown in FIG.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system of the sixth embodiment will be described. Note that the description of the same operation as in the fourth embodiment is omitted.

  The terminal 111 first checks the transmission path state for each frequency band in order to hold transmission path state information for each frequency band of the coaxial transmission path 1101 with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also inspect the transmission line state in order to hold transmission line state information for each frequency band of the coaxial transmission line 1101 with other terminals.

  Next, the transmission transmission path determination unit 1611 of the terminal 111 determines the requested transmission path from a plurality of transmission path state information with the transmission destination terminal held by the transmission path state holding unit 11021. The transmission request generation unit 1612 includes the transmission destination terminal information 31 of the terminal 112 that is the transmission destination, the transmission source terminal information 32 of the own terminal 111 that is the transmission source, and the request transmission path information 171 determined by the transmission transmission path determination unit 1611. Generate transmission request information. Then, the transmission unit 142 transmits the transmission request information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission right allocation processing unit 1621 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and the requested transmission path information 171 are assigned to the terminals 111 to 11n (in this case, the terminal 111).

  Then, the transmission right information generation unit 11032 includes transmission destination terminal information 41, transmission source terminal information 42, transmission period information 43, and frequency band information 1301 from the transmission right assigned by the transmission right assignment processing unit 1621. Transmission right information (see FIG. 14) to the terminals 111 to 11n is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 1101 during the transmission right notification period 23.

  In the terminal 111, the allocated time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the transmission unit 142 so that a signal is transmitted in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the setting of the frequency band of the transmission unit 142 is changed, and transmission information is transmitted in the frequency band set by the frequency setting unit 11023 to the terminal 112 through the coaxial transmission line 1101.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the receiving unit 141 so that the signal is received in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the frequency band setting of the reception unit 141 is changed, and transmission information is received from the terminal 111 through the coaxial transmission line 1101 in the frequency band set by the frequency setting unit 11023.

  As described above, in the coaxial transmission system according to the sixth embodiment, the transmission path state for each used frequency band is inspected between terminals, the terminal holds the inspection result, and the required frequency band is determined from the inspection result, Transmit to the transmission right management device. In the transmission right allocation processing unit of the transmission right management apparatus, communication with high transmission efficiency can be performed by determining the allocation frequency in consideration of the requested frequency information when performing the transmission right allocation process.

  Further, the transmission data capacity to be transmitted is added to the transmission request information generated by the transmission request generation unit 1612 of the terminals 111 to 11n, and transmitted to the transmission right management device 12, and the transmission right allocation processing unit of the transmission right management device 12 is transmitted. When transmission right allocation processing is performed in 1621, communication with higher transmission efficiency can be performed by determining the allocation period in consideration of the capacity of transmission data to be transmitted by the terminal.

(Embodiment 7)
FIG. 19 is a configuration block diagram of the coaxial transmission system according to the seventh embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 4, and the description is abbreviate | omitted.

  In addition to the terminal configuration of the fourth embodiment, each of the terminals 111 to 11n includes the priority of the requested transmission path from a plurality of transmission path status information with the destination terminal held by the transmission path status holding unit 11021. A transmission transmission line priority order determination unit 1811 is provided. Here, the priority of the requested transmission path is, for example, a priority determined from a frequency band having a high transmission rate. Then, the transmission request generation unit 1812 generates transmission request information from the destination information, the transmission source information, and the priority determined by the transmission transmission path priority order determination unit 1811.

  Further, in the transmission right management device 12, the transmission right allocation processing unit 1821 extracts the transmission request information from the terminals 111 to 11n from the transmission information received by the reception unit 151, and transmits the transmission source information, the transmission destination information, and the frequency band. The transmission right allocation (allocation frequency band and allocation period) is processed from the priority information.

  The time frame of the coaxial transmission system of the seventh embodiment has the same configuration as the time frame of the first embodiment shown in FIG.

  FIG. 20 shows a configuration of transmission request information of the coaxial transmission system according to the seventh embodiment. In addition, the same number is attached | subjected to the part of the same content as the transmission request information of Embodiment 4, and the description is abbreviate | omitted.

  The transmission request information 191 is priority information including the priority of the requested transmission path determined by the transmission transmission path priority determining unit 1811 from a plurality of transmission path information with the destination terminal. The priority information 191 is information including a plurality of transmission path state information and the priority for each.

  The transmission right information according to the seventh embodiment of the present invention has the same configuration as the transmission right information according to the fourth embodiment shown in FIG.

  Next, operations in the terminals 111 to 11n and the transmission right management device 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the seventh embodiment will be described. Note that the description of the same operation as in the fourth embodiment is omitted.

  The terminal 111 first checks the transmission path state for each frequency band in order to hold transmission path state information for each frequency band in the coaxial transmission path 1101 with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also inspect the transmission line state in order to hold transmission line state information for each frequency band in the coaxial transmission line 1101 with other terminals.

  Next, the transmission transmission line priority determining unit 1811 of the terminal 111 determines the priority of the requested transmission line from a plurality of transmission line state information with the transmission destination terminal held by the transmission line state holding unit 11021. . For example, the priority is determined from a frequency band having a high transmission rate.

  The transmission request generation unit 1812 includes the transmission destination terminal information 31 of the terminal 112 that is the transmission destination, the transmission source terminal information 32 of the own terminal 111 that is the transmission source, and the priority determined by the transmission transmission path priority order determination unit 1811. The transmission request information is generated from the priority information 191 created from the above. Then, the transmission unit 142 transmits the transmission request information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission right allocation processing unit 1821 extracts the transmission request information from the transmission information received in the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and the priority information 191, the combination having the highest priority is selected, and the transmission right (allocation frequency band and allocation period) to the terminals 111 to 11n (in this case, the terminal 111) is assigned.

  Then, the transmission right information generating unit 11032 includes transmission destination terminal information 41, transmission source terminal information 42, transmission period information 43, and frequency band information 1301 from the transmission right assigned by the transmission right assignment processing unit 1821. Transmission right information (see FIG. 14) to the terminals 111 to 11n is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 1101 during the transmission right notification period 23.

  In the coaxial transfer system according to the seventh embodiment, the transmission right allocation process based on the priority information in the transmission right allocation processing unit 1821 is selected with the combination having the highest priority. If so, any selection method may be used.

  In the terminal 111, the allocated time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the transmission unit 142 so that a signal is transmitted in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the setting of the frequency band of the transmission unit 142 is changed, and transmission information is transmitted in the frequency band set by the frequency setting unit 11023 to the terminal 112 through the coaxial transmission line 1101.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the receiving unit 141 so that the signal is received in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the frequency band setting of the reception unit 141 is changed, and transmission information is received from the terminal 111 through the coaxial transmission line 1101 in the frequency band set by the frequency setting unit 11023.

  As described above, in the coaxial transmission system of the seventh embodiment, the transmission path state for each used frequency band is inspected between terminals, the terminal holds the inspection result, and the priority for each used frequency band is determined from the inspection result. Is transmitted to the transmission right management device. Then, the transmission right assignment processing unit of the transmission right management device determines the assignment period in consideration of the priority for each frequency band used between the terminals when performing the transmission right assignment process. Communication can be performed with high transmission efficiency.

  Further, a transmission data capacity to be transmitted is added to the transmission request information generated by the transmission request generation unit 1812 of the terminals 111 to 11n, and the transmission data is transmitted to the transmission right management device 12, and the transmission right allocation processing unit of the transmission right management device 12 is transmitted. When performing transmission right allocation processing in 1821, considering the capacity of transmission data that the terminal wants to transmit, by determining the allocation period and the frequency band used for communication between the terminals, communication with higher transmission efficiency can be performed. Yes.

(Embodiment 8)
FIG. 21 is a configuration block diagram of the coaxial transmission system according to the eighth embodiment of the present invention. In addition, the same number is attached | subjected to the part of the structure which has the same function as the coaxial transmission system of Embodiment 4, and the description is abbreviate | omitted.

  Each of the terminals 111 to 11n is based on the transmission line state for each used frequency band inspected by the transmission line state inspection unit 143, instead of the transmission line state holding unit 11021 having the terminal configuration of the fourth embodiment shown in FIG. A transmission path information generation unit 2011 that generates transmission path information is provided. And the transmission request production | generation part 2012 produces | generates transmission request information from transmission source information and transmission destination information.

  In addition to the configuration of the transmission right management apparatus of the fourth embodiment, the transmission right management apparatus 12 holds transmission path information for each used frequency band transmitted between the terminals 111 to 11n and between other terminals. A road state holding unit 2021 is provided. Then, the transmission right assignment processing unit 2022 uses the transmission right (assignment) from the transmission destination terminal information, the transmission source terminal information, and the transmission path information for each used frequency band between the terminals held in the transmission path state holding unit 2021. Frequency band and allocation period) are processed.

  The time frame of the coaxial transmission system of the eighth embodiment has the same configuration as the time frame of the third embodiment shown in FIG. Further, the inter-terminal transmission path information of the eighth embodiment has the same configuration as the inter-terminal transmission path information of the third embodiment shown in FIG. Further, the transmission request information of the eighth embodiment has the same configuration as the transmission request information of the third embodiment shown in FIG. Further, the transmission right information of the eighth embodiment has the same configuration as the transmission right information of the fourth embodiment shown in FIG.

  Next, operations in the terminals 111 to 11n and the transmission right management apparatus 12 when transmission is performed from the terminal 111 to the terminal 112 in the coaxial transmission system according to the eighth embodiment will be described. Note that the description of the same operation as in the fourth embodiment is omitted.

  The terminal 111 first checks the transmission path state for each frequency band in order to hold transmission path state information for each frequency band in the coaxial transmission path 1101 with the terminals 112 to 11n. Similarly, the terminals 112 to 11n also inspect the transmission line state in order to hold transmission line state information for each frequency band in the coaxial transmission line 1101 with other terminals.

  Next, the transmission path information generation unit 2011 of the terminals 111 to 11n determines the transmission destination terminal information 91, the transmission source terminal information 92, the transmission source, and the transmission from the transmission path state inspection result for each frequency band of the transmission path state inspection unit 143. Inter-terminal transmission path information composed of transmission path information 93 between the previous terminals is generated. Then, the transmission unit 142 transmits the inter-terminal transmission line information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission line information transmission period 81.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission path state holding unit 2021 extracts and holds the inter-terminal transmission path information from the transmission information received during the transmission path information transmission period 81.

  Next, the transmission request generation unit 2012 of the terminal 111 generates transmission request information from the transmission destination terminal information 31 of the terminal 112 that is the transmission destination and the transmission source terminal information 32 of the own terminal 111 that is the transmission source. Then, the transmission unit 142 transmits the transmission request information to the transmission right management apparatus 12 through the coaxial transmission line 1101 during the transmission request period 22.

  The transmission right management device 12 receives transmission information from the coaxial transmission line 1101 at the reception unit 151. Then, the transmission right allocation processing unit 2022 extracts the transmission request information from the transmission information received during the transmission request period 22, and transmits the transmission destination terminal information 31 (in this case, the terminal 112) and the transmission source terminal information 32 (in this case, the terminal) 111) and transmission path information for each frequency band held in the transmission path state holding unit 2021 is used to assign transmission rights (assigned frequency band and assignment period) to the terminals 111 to 11n (in this case, the terminal 111). Do.

  Then, the transmission right information generation unit 11032 includes transmission destination terminal information 41, transmission source terminal information 42, transmission period information 43, and frequency band information 1301 from the transmission right assigned by the transmission right assignment processing unit 2022. Transmission right information to the terminals 111 to 11n is generated. The transmission unit 152 transmits the transmission right information to the terminals 111 to 11n through the coaxial transmission line 1101 during the transmission right notification period 23.

  In the terminal 111, the allocated time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the transmission unit 142 so that a signal is transmitted in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the setting of the frequency band of the transmission unit 142 is changed, and transmission information is transmitted in the frequency band set by the frequency setting unit 11023 to the terminal 112 through the coaxial transmission line 1101.

  In the terminal 112, the allocation time acquisition unit 148 uses the reception unit 141 to acquire transmission right information from the coaxial transmission line 1101 during the transmission right notification period 23. Then, the transmission right information is passed to the transmission / reception transmission control unit 247, and the transmission / reception transmission control unit 247 transmits the terminal in the information transmission period 24 assigned by the transmission destination terminal information 41, the transmission source terminal information 42, and the transmission period information 43. The frequency setting unit 11023 is instructed to change the frequency band of the receiving unit 141 so that the signal is received in the frequency band assigned by the frequency band information 1301 during the information transmission period 25 between the terminal 111 and the terminal 112. Then, the frequency band setting of the reception unit 141 is changed, and transmission information is received from the terminal 111 through the coaxial transmission line 1101 in the frequency band set by the frequency setting unit 11023.

  As described above, in the coaxial transmission system according to the eighth embodiment, the transmission path state for each used frequency band is inspected between terminals, and the inspection result is transmitted to the transmission right management apparatus in advance. Hold. When receiving a transmission request from a terminal, it is possible to perform transmission right allocation processing considering the transmission path state for each frequency band used between terminals. Further, the amount of transmission request information can be reduced without adding transmission path information every time a transmission request occurs, and communication with high transmission efficiency can be performed.

  Further, the transmission data capacity to be transmitted is added to the transmission request information generated by the transmission request generation unit 2012 of the terminals 111 to 11n, and transmitted to the transmission right management device 12, and the transmission right allocation processing unit of the transmission right management device 12 is transmitted. When performing the transmission right allocation process in 2022, the allocation period and the frequency band used for communication between the terminals are determined in consideration of the capacity of transmission data that the terminal wants to transmit, thereby enabling communication with higher transmission efficiency. Yes.

  As described above, in the coaxial transmission system of each embodiment, the terminal or the transmission right management device holds the transmission line state of the used frequency band, and the transmission right management device transmits the transmission line between the terminals based on the transmission line information. By assigning transmission rights in consideration of the status, it becomes possible to assign transmission rights corresponding to the transmission path status between each terminal, and furthermore, use multiple frequency bands to manage terminals or transmission rights. If the device holds the transmission path state for each frequency band used and is held by the terminal, the transmission path information is added to the transmission request and transmitted to the transmission right management apparatus. Thus, by efficiently assigning the transmission right to each terminal, it becomes possible to cope with the inherent noise for each frequency band between the terminals, and communication with high quality and high transmission efficiency becomes possible.

  In each of the embodiments, the description has been made mainly using the transmission speed as the transmission path state, but other transmission path states such as a transmission error rate may be used as the transmission path state. When the transmission rate is used, the transmission efficiency of the entire system can be increased. However, when the transmission error rate is used, the reliability of the entire system can be increased.

  In each embodiment, for ease of explanation, the transmission system is a coaxial transmission system and the transmission path is a coaxial transmission path. However, the present invention is not limited to the coaxial transmission system and the coaxial transmission path. In addition, the transmission path may be wired or wireless.

  The present invention is not limited to the embodiments described above, and can be implemented with various modifications without departing from the scope of the invention. Further, the embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Further, each embodiment includes various higher-level and lower-level inventions, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted because some constituent elements can be omitted from all the constituent elements described in the means for solving the invention, the omitted part is used when the extracted invention is implemented. Is appropriately supplemented by well-known conventional techniques.

  The program of the present invention is a program for causing a computer to execute the functions of the transmission path information acquisition means and the transmission path information transmission means of the terminal of the transmission system of the present invention described above, in cooperation with the computer. It is a program that runs.

  The recording medium of the present invention is a recording medium carrying a program for causing a computer to execute the functions of transmission path information acquisition means and transmission path information transmission means of the terminal of the transmission system of the present invention described above. And a recording medium in which the read program is used in cooperation with the computer.

  The program of the present invention is a program for causing a computer to execute the functions of the transmission path information receiving means, transmission right allocation processing means, and transmission right information transmitting means of the transmission right management apparatus of the transmission system of the present invention described above. It is a program that operates in cooperation with a computer.

  The recording medium of the present invention is a program for causing a computer to execute the functions of transmission path information receiving means, transmission right assignment processing means, and transmission right information transmitting means of the transmission right management device of the transmission system of the present invention described above. Is a recording medium that is readable by a computer and in which the read program is used in cooperation with the computer.

  Further, one usage form of the program of the present invention may be an aspect in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.

  Further, the recording medium includes a ROM and the like.

  The computer of the present invention described above is not limited to pure hardware such as a CPU, and may include firmware, an OS, and peripheral devices.

  As described above, the configuration of the present invention may be realized by software or hardware.

  By holding information on the used frequency band of the transmission path and performing transmission right assignment processing on the transmission path based on the information, by providing an efficient communication environment according to the usage environment, high-quality images, etc. It can also be used in applications where it is essential to efficiently transmit high quality and large capacity.

Outline block diagram of transmission system for explaining features of the present invention Configuration block diagram of coaxial transmission system according to Embodiment 1 of the present invention The figure which shows the time frame of Embodiment 1 of this invention. The figure which shows the structure of the transmission request information of Embodiment 1 of this invention. The figure which shows the structure of the allocation information of Embodiment 1 of this invention. Configuration block diagram of coaxial transmission system according to Embodiment 2 of the present invention The figure which shows the structure of the transmission request information of Embodiment 2 of this invention. Configuration block diagram of coaxial transmission system according to Embodiment 3 of the present invention The figure which shows the time frame of Embodiment 3 of this invention. The figure which shows the structure of the transmission line information between terminals of Embodiment 3 of this invention. The figure which shows the structure of the transmission request information of Embodiment 3 of this invention. Configuration block diagram of coaxial transmission system according to embodiment 4 of the present invention The figure which shows the structure of the transmission request information of Embodiment 4 of this invention. The figure which shows the structure of the allocation information of Embodiment 4 of this invention. Configuration block diagram of coaxial transmission system according to embodiment 5 of the present invention The figure which shows the structure of the transmission request information of Embodiment 5 of this invention. Configuration block diagram of coaxial transmission system according to Embodiment 6 of the present invention The figure which shows the structure of the transmission request information of Embodiment 6 of this invention. Configuration block diagram of coaxial transmission system according to embodiment 7 of the present invention The figure which shows the structure of the transmission request information of Embodiment 7 of this invention. Configuration block diagram of coaxial transmission system according to embodiment 8 of the present invention Configuration block diagram of conventional coaxial transmission system The figure which shows the time frame of the conventional transmission system The figure which shows the structure of the transmission request information of the conventional transmission system The figure which shows the structure of the allocation information of the conventional transmission system

Explanation of symbols

111 to 11n, 2111 to 211n Terminal 12, 212 Transmission right management device 13, 1101, 213 Coaxial transmission path 141, 151, 2141, 2151 Reception unit 142, 152, 2142, 2152 Transmission unit 143 Transmission path state inspection unit 144 Transmission path State inspection control unit 145, 721, 11021, 2021 Transmission path state holding unit 146, 512, 712, 11022, 14012, 1612, 1812, 2012, 2143 Transmission request generation unit 147, 247, 2144 Transmission / reception transmission control unit 148 Acquisition of allocated time Units 153, 521, 722, 11031, 14021, 1621, 1821, 2022, 2153 Transmission right allocation processing units 154, 11032, 2154 Transmission right information generation unit 21 Transmission path inspection period 22, 221 Transmission request period 23, 222 Transmission right notification Period 24, 223 Information transmission period 25 Information transmission period between terminal 111 and terminal 112 31, 41, 91, 231, 241 Transmission destination terminal information 32, 42, 92, 232, 242 Transmission source terminal information 33, 93 Transmission path information 43, 243 Transmission period information 511, 14011 Transmission period information generator 61, 1501-150m Transmission request period information 711, 2011 Transmission path information generation section 81 Transmission path information transmission period 11023 Frequency setting section 1201-120m Transmission path information 1301 Frequency band Information 1611 Transmission transmission path determination section 171 Request transmission path information 1811 Transmission transmission path priority order determination section 191 Priority information 224 Information transmission period between terminal 2111 and terminal 2112

Claims (25)

Multiple terminals that send and receive signals;
A transmission right management device for managing and assigning a time zone for transmitting and receiving signals between the terminals;
In a transmission system comprising a transmission path for communicating each of the plurality of terminals and the transmission right management device with each other,
Each of the plurality of terminals is
Transmission path information acquisition means for acquiring transmission path information between each other terminal;
Transmission path information transmitting means for transmitting the acquired transmission path information to the transmission right management device,
The transmission right management device includes:
Transmission path information receiving means for receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
A transmission system comprising: transmission right information transmitting means for transmitting the time slot allocation result to each of the plurality of terminals.   The transmission system according to claim 1, wherein the transmission path information is information regarding transmission conditions when communicating with the other terminal and a transmission path state corresponding thereto.   3. The transmission system according to claim 2, wherein when there are a plurality of types of transmission conditions, the transmission right management device assigns the time zone and determines transmission conditions.   The transmission system according to claim 3, wherein the transmission condition is a frequency band and / or a modulation scheme and a transmission bandwidth.   The transmission system according to claim 2, wherein the transmission path state is a transmission rate and / or a transmission error rate. The transmission path state is a transmission speed,
The transmission system according to claim 2, wherein the transmission right information processing unit allocates a large time zone for transmission and reception for communication between terminals having a low transmission rate in consideration of the transmission rate. Each of the plurality of terminals also transmits the transmission data capacity to be transmitted to the destination terminal in addition to the transmission path information,
The transmission system according to claim 1, wherein the transmission right management device further assigns the time zone in consideration of the capacity. The transmission path information is a transmission speed,
The transmission system according to claim 7, wherein the transmission right information processing unit allocates a large transmission / reception time zone to a communication in which transmission of the transmission data between terminals is late in consideration of the transmission speed and the capacity.   The transmission system according to claim 1, wherein the transmission path information is a time required for transmitting transmission data to be transmitted to a transmission destination terminal to the transmission destination terminal.   The transmission system according to claim 1, wherein each of the plurality of terminals acquires and updates transmission path information with each other terminal at regular intervals.   4. The transmission system according to claim 3, wherein each of the plurality of terminals transmits only transmission path information under a transmission condition desired in communication with the other terminal to the management apparatus. Each of the plurality of terminals gives a priority to each of the plurality of transmission path information and transmits,
The transmission system according to claim 3, wherein the transmission right management device further assigns the time zone and determines a transmission condition in consideration of the priority.   The transmission according to claim 12, wherein each of the plurality of terminals gives high priority to a frequency band and / or a modulation scheme and a transmission bandwidth desired to be preferentially used for communication between specific terminals. system.   2. The transmission system according to claim 1, wherein the transmission right management device further includes a transmission path information update request unit that requests each of the plurality of terminals to update a transmission path state via the transmission path. .   2. The transmission system according to claim 1, wherein each of the plurality of terminals transmits the transmission path information when requesting the transmission right management apparatus to allocate a communication time.   2. The transmission system according to claim 1, wherein each of the plurality of terminals transmits the transmission path information in advance before requesting the transmission right management apparatus to allocate a communication time.   The transmission system according to claim 1, wherein each of the plurality of terminals acquires the transmission path information when requesting the transmission right management apparatus to allocate a communication time.   2. The transmission system according to claim 1, wherein the transmission path includes a plurality of coaxial cables and a distributor that branches a signal of one coaxial cable into signals of another plurality of coaxial cables. Multiple terminals that send and receive signals;
A transmission right management device for managing and assigning a time zone for transmitting and receiving signals between the terminals;
In a transmission method of a transmission system comprising a transmission path for communicating each of the plurality of terminals and the transmission right management device with each other,
The plurality of terminals are:
Obtaining transmission path information with each other terminal;
Transmitting the acquired transmission path information to the transmission right management device,
The transmission right management device includes:
Receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, assigning a time zone for transmitting and receiving signals between the terminals,
Transmitting the time slot allocation result to each of the plurality of terminals. Each of a plurality of terminals of the transmission system according to claim 1;
The transmission path information acquisition means for acquiring transmission path information between each other terminal;
And a program for causing a computer to function as the transmission path information transmitting means for transmitting the acquired transmission path information to the transmission right management device.   A recording medium carrying the program according to claim 20, which is usable by a computer. The transmission right management device of the transmission system according to claim 1,
The transmission path information receiving means for receiving the transmission path information from each of the plurality of terminals;
In consideration of the transmission path information, the transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
A program for causing a computer to function as the transmission right information transmitting means for transmitting the time zone allocation result to the plurality of terminals.   23. A recording medium carrying the program according to claim 22, which can be used by a computer. In the transmission system according to claim 1,
Transmission path information acquisition means for acquiring transmission path information between each other terminal;
A terminal comprising transmission path information transmitting means for transmitting the acquired transmission path information to a transmission right management device. In the transmission system according to claim 1,
Transmission path information receiving means for receiving transmission path information from each of a plurality of terminals;
In consideration of the transmission path information, transmission right assignment processing means for assigning a time zone for transmitting and receiving signals between the terminals,
A transmission right management device comprising: transmission right information transmission means for transmitting the time slot allocation result to each of the plurality of terminals.

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