JP5664352B2 - Method for initial construction of wireless communication network system and mobile station - Google Patents

Description

  The present invention relates to a network system that wirelessly communicates with a plurality of mobile stations having variable directional antennas by a time division multiplexing method, and in particular, controls a variable directional antenna to avoid signal interference and to initially establish a wireless communication network. Concerning how to build.

  A wireless communication network system constructed from a single reference station (hereinafter referred to as “parent station”) and a plurality of dependent stations (hereinafter referred to as “child stations”) is a network topology used in all systems including a wireless LAN. . In a wireless communication network having a single master station and multiple slave stations as antennas and an omnidirectional antenna, the master station can construct a network without knowing its own location and the location of the slave station. . However, in a radio communication network system in which the master station and the plurality of slave stations are both mobile stations and have variable directional antennas, antenna directivity control is required in each station.

  Usually, interference avoidance is an indispensable technique for constructing a wireless communication network. For example, in a wireless LAN or the like, data collision occurs when a plurality of terminals that have been carrier-sensed and are waiting for vacancy transmit all at once. In order to avoid this collision, each terminal is provided with a back-off time in which a random number is generated after the channel becomes idle and a standby time is set according to the number of generated random numbers.

  Also, in constructing a communication network, in Patent Document 1, a pilot signal is transmitted from a base station (parent station) in all directions within an area, and reception characteristics of pilot signals transmitted from a plurality of subordinate stations (terminal stations) are disclosed. Has proposed a method for controlling the directivity of a variable directivity antenna included in a base station (parent station).

JP-A-9-200115 (page 1-28, FIG. 1)

  According to Patent Document 1, in the case of a fixed master station (base station), the antenna directivity of the master station can be controlled by simple control so as to be surely directed to the direction of a terminal that performs communication, The effect can be demonstrated and the communication quality can be improved. However, when the master station and a plurality of slave stations move, it does not take into account the complicated positional relationship due to movement, and when transmitting pilot signals from the master station to all the slave stations, time division It is assumed that no interference occurs due to frequency division or code division.

  Thus, in the case of a system in which a single master station and a plurality of slave stations are both mobile stations and move in a complicated manner, interference may occur in time division or code division other than frequency division. In the case of the wireless communication network system of the present invention, since radio waves are divided in space, interference occurs only when there are two or more stations within the same beam range.

  In wireless LAN, etc., in order to avoid interfering with multiple terminals that have performed carrier sense to check the status of radio waves as a result of starting transmission all at once, each terminal responds to a random number generated before transmission. Random back-off time is set to wait for transmission for a certain time. However, there are few cases where two or more stations exist in the same beam coverage of the master station, and in most cases the back-off time becomes a dead time, resulting in a decrease in throughput, which is a processing capability per unit time. There's a problem.

  The present invention has been made to solve the above-described problems, and includes a means for avoiding a case where reception responses transmitted simultaneously from a plurality of slave stations interfere with each other in the master station, and the same beam range of the master station is provided. In the case where there is no child station or only one station is present, an object is to suppress a decrease in throughput and reduce dead time.

  An initial construction method of a wireless communication network system according to the present invention is an initial construction method of a wireless communication network system that performs communication by a time division multiplexing method between a plurality of mobile stations including a single master station and a plurality of slave stations. A step of waiting for a predetermined time after the parent station transmits a beacon signal; a step of waiting for a predetermined time after returning a reception response to the parent station when the slave station receives the beacon signal; and If the reception response is received while waiting for a certain time, registering the direction of the slave station that transmitted the reception response, and transmitting an ACK signal in that direction; and the slave station waiting for a certain time If the ACK signal is received while the master station is in the process of registering the direction of the master station, the reception response is received while the master station is waiting for a predetermined time. If the second beacon signal is not received, the step of transmitting the second beacon signal, and the case where the slave station cannot receive the ACK signal while waiting for a certain period of time and then receiving the second beacon signal, A step of transmitting a second reception response at different timings, and a step of registering the direction of the slave station that has transmitted the second reception response when the parent station has received the second reception response; And a step of registering a direction of the master station when the slave station receives the ACK signal from the master station in response to the second reception response.

  A mobile station according to the present invention is a mobile station that is the parent station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations, and is variable An antenna unit having a directional antenna and capable of directing a desired direction, a transmitting / receiving unit that transmits and receives an RF signal to and from the antenna unit, an antenna control unit that controls a beam directing direction of the antenna unit, and presence or absence of interference of the RF signal An interference determination unit, and a communication control unit having a network control unit that controls the timing of transmission / reception of the transmission / reception unit based on the determination result of the interference determination unit, and a beacon signal when initially constructing a wireless communication network system A step of waiting for a certain period of time after transmitting the signal, and reception from the slave station that has received the beacon signal while waiting for the certain period of time When receiving an answer, register the direction of the slave station that transmitted the reception response, and transmitting an ACK signal in that direction; and when the reception response cannot be received while waiting for the predetermined time, Transmitting the second beacon signal and transmitting the second reception response when the slave station receiving the second beacon signal receives the second reception response transmitted at different timings. Registering the direction of the slave station and transmitting an ACK signal in that direction.
  A mobile station that is the slave station of a wireless communication network system that communicates by a time-division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations, and has a variable directional antenna An antenna unit capable of directing a desired direction, a transmission / reception unit that transmits / receives an RF signal to / from the antenna unit, an antenna control unit that controls a beam directing direction of the antenna unit, and a network control unit that controls a timing at which the transmission / reception unit transmits / receives When the beacon signal transmitted by the parent station is received when initially constructing a wireless communication network system, a step of waiting for a predetermined time after returning a reception response to the parent station, When receiving the ACK signal transmitted by the master station that has received the reception response while waiting for the predetermined time, the direction of the master station is determined. And when receiving the second beacon signal transmitted by the master station when the ACK signal cannot be received while waiting for the predetermined time and then receiving the second beacon signal transmitted by the master station, the second reception is performed at different timings. A step of transmitting a response; and a step of registering the direction of the master station when an ACK signal is received from the master station in response to the second reception response.

  According to the present invention, when a moving parent station and a plurality of child stations initially construct a wireless communication network system, interference in the parent station can be avoided and no child station exists in the beam coverage of the parent station. Or a decrease in throughput when only one station exists. In addition, the dead time can be reduced, and the wireless communication network system can be initially constructed at high speed.

The image figure which shows the basic operation mode of the radio | wireless communication network system which concerns on Embodiment 1 of this invention. The image figure which shows the sequence of the operation mode of the radio | wireless communication network system which concerns on Embodiment 1 of this invention. The antenna beam pointing direction switching diagram of the master station or the slave station according to Embodiment 1 of the present invention. FIG. 2 is a functional block diagram of a master station or a slave station according to Embodiment 1 of the present invention. 4 is an example of an antenna beam pattern of a master station or a slave station according to Embodiment 1 of the present invention. FIG. 2 is a functional block diagram of a master station or a slave station according to Embodiment 1 of the present invention. An example of information managed in a memory unit of a master station or a slave station according to Embodiment 1 of the present invention. FIG. 3 is a functional block diagram of a network control unit in a master station or a slave station according to Embodiment 1 of the present invention. The interference avoidance sequence (1) of the system which concerns on Embodiment 1 of this invention. The interference avoidance sequence (2) of the system which concerns on Embodiment 2 of this invention. The interference avoidance sequence (3) of the system which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 shows a basic operation image of the system according to Embodiment 1 of the present invention. In this example, there are five wireless stations moving in the communication area 1, 2 is a single master station, and the remaining four stations are slave stations 3. By establishing a wireless communication network and exchanging each location information, the location of each radio station can be grasped, so that appropriate antenna directivity control is possible and timing information can also be shared, so time division control Interference can be avoided by performing. However, in a network unestablished state, there is a possibility that interference occurs because the reference timing is unknown in the position and network of each station.

  FIG. 2 shows an operation mode sequence for constructing a communication network of the system according to the first embodiment. The communication network first grasps the positions of the master station 2 and the plurality of slave stations 3 in the initial acquisition mode 201, and then shifts to the network mode 202 to perform radio wave tracking. Here, when the tracking is lost, the mode shifts to the search mode 203 and shifts to the network mode 202 again. Further, by changing the resources allocated to the communication network, it is possible to shift to the data transmission mode 204 in which large-capacity data communication or the like is performed. Among these modes, the present invention relates to an initial network construction that avoids interference in the initial acquisition mode 201.

  FIG. 3 relates to the first embodiment, and shows how the antenna beam pointing direction is switched for the master station 2, for example. The beam directing direction of the variable directivity antenna 24 possessed by the master station 2 of this system is switched by time division (t0, t1, t2,..., Tn) to search for surrounding terminals.

  FIG. 4 shows an example of the configuration of the master station 2 or the slave station 3 according to the first embodiment. The master station 2 and each slave station 3 have the same configuration, and include an antenna unit 21 (for example, eight), a communication control unit 22, and a transmission / reception unit 23 (for example, eight). Variable directivity antennas 24-1 to 24-8 that can switch the beam direction of the antenna units 21-1 to 21-8 according to a command from the communication control unit 22, and a transmission / reception unit 23-for transmitting and receiving RF signals 1 to 23-8, and one communication control unit 22 for these.

  FIG. 5 is an example of a beam pattern in which the beam directions that each antenna unit 21 can direct are shown in two dimensions (AZ / EL). Here, AZ is an azimuth, and EL is an abbreviation for Elevation and indicates an orientation. Each variable directivity antenna 24 has a plurality of beam patterns with respect to the two-dimensional direction in the covering area of the AZ direction ± 45 ° and the EL direction ± 45 °. It is installed so as to cover different coverage areas in different directions, receives instructions from the communication control unit 22 in the direction in which the beam of each antenna should be directed, and directs the beam in that direction. Therefore, when the coverage areas of the plurality of antenna units 21 are integrated, it is possible to cover all the necessary areas as the whole antenna unit and to direct the beam.

  FIG. 6 is a functional block diagram of the master station 2 or the slave station 3. Each antenna unit 21 has a variable directivity antenna 24 that can arbitrarily switch the beam direction under the control of the antenna control unit 221. The transmission / reception unit 23 includes an RF unit 25 that transmits and receives signals, and a reception level measurement unit 26 that measures a reception signal level.

  The communication control unit 22 includes a switch 222 that selects an antenna path, a modulation / demodulation unit 223 that performs modulation / demodulation processing of a transmission / reception signal, an interference determination unit 224 that determines presence / absence of interference with reference to a reception level and a demodulation result, A variable directional antenna 24 that calculates an absolute beam direction to be directed based on position / posture direction information and is used in accordance with an instruction from the network control unit 31, an antenna control unit 221 that controls the beam direction, and control information thereof And a network control unit 31 for managing a reference timing inputted from the outside and notifying the antenna control unit 221 of timing / mode / connection destination ID information.

  Next, details of the transmission / reception unit 23 will be described. The RF unit 25 converts the frequency into an RF signal and amplifies the RF signal, amplifies the RF signal obtained from the received signal, extracts the necessary band, converts the RF signal into an IF signal, and converts the converted IF signal. A reception system for transmitting to the communication control unit 22 and the reception level measurement unit 26 is provided.

  The reception level measurement unit 26 detects the reception IF signal and transmits the reception signal level as a voltage signal to the interference determination unit 224 of the communication control unit 22.

  Next, details of the communication control unit 22 will be described. In the switch 222, the antenna path to be used is individually selected for the transmission system and the reception system in accordance with the control from the antenna control unit 221. The interference determination unit 224 converts the analog received signal level into a digital value, and determines that interference has occurred when the reception level is equal to or higher than a certain value, but the network control unit 31 determines that interference has occurred. To notify.

  The modulation / demodulation unit 223 modulates the transmission signal according to the timing information from the network control unit 31 using the modulation scheme, coding scheme, and spreading factor specified by the network control unit 31, performs D / A conversion, and performs the transmission / reception unit 23. Send to. In addition, A / D conversion is performed on the reception signal input from the transmission / reception unit 23, the reception signal is demodulated based on the communication method stored in the header, transmitted to the network control unit 31, and the demodulation result is notified to the interference determination unit 224. To do.

  The memory unit 225 stores the antenna number, beam number, own station position, posture orientation, and time at the time of connection together with the ID of the connected terminal. FIG. 7 shows an example of information stored in the memory unit 225. For each transmission frame, an antenna number (M is 8 in the case of FIG. 4), a beam number (N is 46 in the case of FIG. 5), time, and own station position. , Posture orientation, connection ID is stored.

  The antenna control unit 221 operates in accordance with the mode instruction from the network control unit 31, receives a connection completion notification / connection destination terminal ID from the network control unit 31, and selects the antenna number, beam number, and own device position selected at that time. / The orientation registration and the time are stored in the memory unit 225 to complete the terminal location registration. Also, the terminal ID information to be connected is received from the network control unit 31, and the antenna control information (antenna number / beam number) and the own device position / posture direction at the previous communication with the ID are referred from the memory unit 225. Then, the relative azimuth of the beam directing direction is calculated, the antenna beam directing direction is controlled according to the timing from the network control unit 31 based on the calculation result, and the antenna unit 21 to be used according to the transmission / reception partner is selected. The switch 222 is controlled.

  FIG. 8 is a functional block diagram of the network control unit 31. The network control unit 31 includes a communication management unit 311, a data buffer unit 312, a timing management unit 313, a network management unit 314, and a mode management unit 315.

  The timing management unit 313 manages beam control timing and data transmission / reception timing in synchronization with a reference timing signal input from the outside, and notifies the mode management unit 315, the network management unit 314, and the communication management unit 311 of timing information. . In addition, the slot configuration is calculated based on the subscriber station information from the network management unit 314 and the operation mode from the mode management unit 315, the transmission timing of the data buffer unit 312 is controlled, and the slot configuration for the communication management unit 311 is calculated. Provide information.

  The timing management unit 313 manages beam control timing and data transmission / reception timing in synchronization with a reference timing signal input from the outside, and notifies the mode management unit 315, the network management unit 314, and the communication management unit 311 of timing information. . In addition, the slot configuration is calculated based on the subscriber station information from the network management unit 314 and the operation mode from the mode management unit 315, the transmission timing of the data buffer unit 312 is controlled, and the slot configuration for the communication management unit 311 is calculated. Provide information.

  The data buffer unit 312 transmits a transmission signal input from the outside to the communication management unit 311 in accordance with the transmission timing managed by the timing management.

  The mode management unit 315 switches the operation mode (initial acquisition, search, data communication) of the master station / slave station and the own station by an external operation. Further, based on the network subscription information from the network management unit 314, in addition to whether the own station is the master station 2 or the slave station 3, the own station operation mode (initial acquisition mode 201, network mode 202, search mode 203, data The transmission mode 204) is determined and managed, and the operation mode of the own station is notified to the timing management unit 313 and the antenna control unit 221. Further, upon receiving the interference determination result from the interference determination unit 224, the timing management unit 313 and the antenna control unit 221 are instructed to switch to the interference avoidance mode.

  In accordance with the timing information from the timing management unit 313, the network management unit 314 receives the received signal (connection radio station ID, status information) and the received signal level from the communication management unit 311 and receives the network status (number of subscribed radio stations, subscriptions). Radio station ID, status of each subscribing radio station, received signal level). Also, the current network information of the local station is provided to the mode management unit 315, receives an instruction of the current operation mode from the mode management unit 315, and manages so that the state of the managed network and the operation mode are linked. At the same time, it notifies the antenna control unit 221 of the connection destination ID of the other party who is going to communicate.

  The communication management unit 311 receives the connected wireless station ID and the status information from the received signal input from the modem unit 223 based on the timing from the timing management unit, notifies the network management unit 314, and sends it from the data buffer unit. Similarly, based on the timing from the timing management unit, the input transmission signal is added with time stamp information and network information and transmitted to the modem unit 223. In addition, the radio wave propagation environment with each station is managed from the received signal level input from the interference determining unit, the modulation / decoding unit 223 is notified of the modulation / coding scheme and the spreading factor, and the received signal level is also transmitted to the network managing unit 314. Notify information. Furthermore, it is determined from the received signal from the modem 223 whether or not the wireless station is permitted to connect, and if it is not the permitted wireless station, the data is discarded.

  Further, when the local station is the master station 2, the communication management unit 311 determines that the slave station 3 exists in the transmission direction when receiving a reception response from the slave station 3 within a certain time after outputting the beacon signal, and again An ACK signal is transmitted in the same direction, and a connection completion notification is sent to the antenna control unit 221. When the local station is the slave station 3, after receiving the beacon signal from the master station 2, it transmits a reception response signal, receives the ACK signal from the master station 2, and indicates that the connection is completed. Terminal information is registered.

  FIG. 9 is an operation sequence of the master station 2 and the slave station No 3 and the slave station No 4 for avoiding interference in the present system. In the initial acquisition mode, the master station 2 transmits a beacon signal while switching the beam directing direction with respect to the surroundings (step S101). After transmission, the device waits for a certain period of time (response waiting state) (step S102). When the slave station No3 and the slave station No4 receive the beacon signal from the master station 2, they immediately transmit a reception response to the master station 2 (steps S301 and S401). However, if the slave station No3 and the slave station No4 are located in the same direction, the reception response signals from the slave station No3 and the slave station No4 interfere with reception of the master station 2 and are not normally received. Therefore, if the master station 2 receives some radio wave within the wait time and cannot receive normally, it determines that interference has occurred and switches to the interference avoidance mode (step S103). The slave station No3 and slave station No4 return a reception response, and then wait for a certain period of time as in the master station 2 (steps S302 and S402). If the ACK signal from the master station 2 cannot be received within the wait time, it is determined that interference has occurred on the master station 2 side, and the mode is switched to the interference avoidance mode (steps S303 and S403).

After switching to the interference avoidance mode, the master station 2 transmits a beacon signal again (step S104). When this beacon signal is received, the slave station No3 and the slave station No4 do not immediately return a reception response, but provide a random backoff time (steps S304 and S404) and return a reception response (steps S305 and S405). The master station 2 registers the directions of the slave stations No3 and No4 (steps S105 and S107), and returns an ACK signal (steps S106 and S108). When the slave station No 3 and slave station No 4 receive this ACK signal, they register the master direction (steps S306 and S406). As described above, in the case where the slave stations 3 are located in the same direction, interference of signals from the slave stations No 3 and No 4 in the master station 2 can be avoided.

  In the sequence of FIG. 9, the communication management unit 311 of the network control unit 31 waits for a certain time after transmitting the beacon signal when the own station is the master station 2 (step S101, step S102). If it is determined that there is no slave station 3 or if there is interference from the interference determination unit 224, it is determined that there are a plurality of slave stations, and interference has occurred to the mode management unit 315. And retransmits the data to the modem unit 223.

  If the local station is the slave station 3, a reception response is transmitted after receiving a beacon signal from the master station 2 (steps S301 and S401). When there is no response after waiting for a certain time (steps S302 and S402), it is determined that interference has occurred, and the mode management unit 315 is notified that the interference has occurred. When the own station is the slave station 3, an instruction to switch to the interference avoidance mode is received from the mode management unit 315, and a random backoff time is provided after receiving the beacon signal from the master station 2 until returning the reception response ( Steps S304 and S404). Thereafter, the antenna control unit 221 is notified that the ACK signal from the master station 2 has been received (connection establishment completed).

  As described above, according to the first embodiment, when there are two slave stations in the same beam coverage area, each slave station provides a back-off time first after receiving the beacon signal from the master station. By responding to the master station without any interference, it is possible to avoid interference at the master station and to suppress a decrease in throughput when there is no slave station in the beam coverage of the master station or when there is only one station. can do. Furthermore, there is an effect that it is possible to reduce useless time and establish a wireless communication network with high-speed initial supplementation.

Embodiment 2. FIG.
The second embodiment shows a method for constructing a communication network by initial supplementation at a high speed by a sequence different from that of the first embodiment when there are two slave stations in the same beam coverage of the master station 2. FIG. 10 shows an interference avoidance sequence (2) of the system according to the second embodiment.

  FIG. 10 shows that when there are two slave stations in the same beam coverage of the master station 2, the slave station No 3 and the slave station No 4 grasp each other, and the master station 2 and each slave station are directed without delay. It is a sequence that can be registered. First, the master station 2 transmits a beacon signal to the surroundings while switching the beam directing direction (step S101). When the slave station No3 and the slave station No4 receive the beacon signal, the slave station No3 and the slave station No4 immediately return a reception response to the master station 2 at the same timing. (Step S301, Step S401). At this time, both the slave station No. 3 and the slave station No. 4 are set in a reception standby state by directing different antennas in a direction symmetrical to the transmission direction by 180 °. In this way, when there are a plurality of counterpart stations in the same beam direction, it is possible to grasp the existence of other stations on the extension line between the master station 2 and the own station. In the case of FIG. 10, the slave station No3 first receives the radio wave of the slave station No4 (step S321), and performs direction registration of the slave station No4 (step S322).

  Next, since the slave station No. 3 knows that there is a high possibility that interference has occurred in the master station 2, it retransmits the reception response to the master station 2 again (step S323). The master station 2 receives the slave station signal, registers the direction of the slave station No3 (step S105), and transmits an ACK signal (step S106). At this time, the slave station No. 3 performs registration in the master station 2 direction (step S306), and the slave station No. 4 similarly receives an ACK signal. It can be understood that there is another child station between them. Thereafter, the slave station No. 4 retransmits the reception response (step S421), the master station 2 registers the direction of the slave station No. 4 (step S108), and the slave station No. 4 completes the registration of the master station 2 direction (step S406). .

  In FIG. 10, when the local station is a slave station, the communication management unit 311 transmits a reception response to the master station 2 after receiving a beacon signal from the master station 2 (steps S301 and S401). At the same time, the received signal is monitored. For example, when the slave station No 3 has confirmed reception, the direction of the slave station No 4 that is the transmission source of the received signal is registered, it is determined that interference has occurred in the master station 2, and the reception response signal is sent to the master station 2. Retransmit (step S323). If the own station is a slave station No4, after receiving a beacon signal from the master station 2, it transmits a reception response (step S401), waits for a certain time (step S402), and determines that interference has occurred if there is no response. In addition, the mode management unit 315 is notified that interference has occurred, and the reception response signal is retransmitted to the master station 2 (step S421).

  Further, when the local station is a slave station, the antenna control unit 221 receives an antenna beam in a direction opposite to the transmission direction by 180 ° when transmitting a reception response to the master station 2 after receiving a beacon signal from the master station 2. The antenna 222 is selected by controlling the switch 222 so as to be able to receive radio waves, and the beam direction is controlled.

  Thus, according to the sequence of the present embodiment, when there are two slave stations in the same beam coverage, when each slave station receives a beacon signal, a reception response is immediately returned to the master station. At the same time, another antenna is directed toward the direction symmetrical to the transmission direction by 180 °, and reception is awaited. As a result, each slave station grasps each other's existence and does not provide backoff time without delay, and the master station and each slave station register directions to each other, so that there is a slave station in the beam coverage of the master station. If this is not done, or if there is only one station, a decrease in throughput can be suppressed. Furthermore, the dead time can be reduced, and the effect of being able to construct a communication network system by initially supplementing at high speed can be achieved.

Embodiment 3 FIG.
In the third embodiment, when there are two slave stations in the same beam coverage of the master station 2, a communication network is established by initial supplementation at a high speed by a sequence different from the first and second embodiments. How to do. FIG. 11 shows an interference avoidance sequence (3) of the system according to the third embodiment.

  In FIG. 11, the slave station No3 retransmits the reception response to the master station 2 again (step S323), and immediately transmits its own station information to the slave station No4 (step S331). In the slave station No4, a wait is provided for a certain time (step S402), and a signal from the slave station No3 is received while waiting for an ACK signal from the master station 2 (step S431). The slave station No. 4 can register the direction of the slave station No. 3 as well as the slave station No. 3 (step S432), and can grasp each other's position. Note that the position here is a position where communication is possible, and it is not always necessary to grasp accurate coordinates.

  In FIG. 11, the communication management unit 311 transmits a reception response to the master station 2 after receiving a beacon signal from the master station 2 when the own station is a slave station, and at the same time, a transmission direction and a direction that is subject to 180 °. The received signal from is monitored. When reception is confirmed, the ID of the slave station 3 that is the transmission source of the received signal is registered (steps S321 and S322), it is determined that interference has occurred in the master station 2, and the reception response signal is sent to the master station. Immediately after being retransmitted to 2 (step S323), the antenna control unit 221 is instructed to transmit the local station information to the master station 2 in the direction of 180 ° (step S331).

  As described above, according to the sequence of the third embodiment, when there are two slave stations in the same beam coverage, the slave station points another antenna in a direction 180 ° symmetrical to the transmission direction of its own signal. Waiting for a signal, identifying another slave station that was the source of interference, sending its own station information to that slave station, and grasping each other's presence, resulting in registration time in the direction of the master station 2 Can also be shortened. As a result, the dead time can be further reduced as compared with the second embodiment, and the effect of being able to construct a wireless communication network with initial supplementation at high speed can be achieved.

1 communication area, 2 master station, 3 slave stations,
201 initial acquisition mode, 202 network mode, 203 search mode,
204 data transmission mode,
21 antenna unit, 22 communication control unit, 23 transmission / reception unit, 24 variable directional antenna,
25 RF unit, 26 reception level measurement unit,
221 antenna control unit, 222 switch, 223 modulation / demodulation unit, 224 interference determination unit, 225 memory unit,
31 network control unit, 311 communication management unit, 312 data buffer unit,
313 Timing manager, 314 Network manager, 315 Mode manager.

Claims (9)

A initial construction method of a wireless communication network systems that communicate by time division multiplexing between a plurality of mobile stations comprising a single master station and a plurality of slave stations,
Waiting for a certain time after the master station transmits a beacon signal;
If the previous Noriko station receives the beacon signal, the steps of waiting a predetermined time after the reply received in response to said master station,
A step of said reception response when receiving, registering the direction of the slave station that transmitted the reception response, and transmits an ACK signal in that direction while said master station is listening a certain time,
Registering the direction of the master station when the slave station receives the ACK signal while waiting for a certain period of time;
When the master station can not receive the reception response while waiting a predetermined time, transmitting a second beacon signal,
A step wherein when the subsequent receiving the second beacon signal can not receive the ACK signal, transmits a second reception response respectively different timings while the slave station is waiting a certain time,
When the master station receives the second reception response , registering the direction of the slave station that transmitted the second reception response ;
An initial construction of a wireless communication network system comprising: a step of registering a direction of the master station when the slave station receives the ACK signal from the master station in response to the second reception response. Method. A initial construction method of a wireless communication network systems that communicate by time division multiplexing between a plurality of mobile stations comprising a single master station and a plurality of slave stations,
Waiting for a certain time after the master station transmits a beacon signal;
Oriented if the previous Noriko station receives the beacon signal, the co the wait a certain time after the reply received in response to said master station, another antenna to the slave station has replied direction 180 ° symmetry direction a step of waiting the reception response from another of said slave station is,
If the reception response is received while the master station is waiting for a certain time, registering the direction of the slave station that has transmitted the reception response and transmitting an ACK signal in that direction;
If the previous Noriko station receives the reception response from another of said slave stations in a different antenna, and transmitting the second acknowledgment Previous SL master station,
Transmitting said if it can not receive the ACK signal, the second reception response Previous SL master station from the master station while the remote station is waiting a certain time,
When the master station receives the second reception response , registering the direction of the slave station that transmitted the second reception response, and transmitting an ACK signal in the direction;
Before when Noriko station receives the ACK signal from the master station, initial construction method of a wireless communication network system is characterized in that a step of registering the direction of the front Kioyakyoku. A initial construction method of a wireless communication network systems that communicate by time division multiplexing between a plurality of mobile stations comprising a single master station and a plurality of slave stations,
Waiting for a certain time after the master station transmits a beacon signal;
Before when Noriko station receives the beacon signal, the co Replying a reception response to the master station, the child another to direct a different antenna to the direction of 180 ° symmetry direction in which the slave station has replied a step of Ru receiving waits for the reception response from the station,
Before when Noriko station has received a reception response from another of said slave stations in a separate antenna, before Symbol to transmit Then share the second reception response to the master station, another of the child sent from the reception response Identifying a station and sending its own station information to the other slave station;
A step separate the slave station, to transmit the when receiving a local station information, the second reception response Previous SL master station,
When the master station receives the second reception response , registering the direction of the slave station that transmitted the second reception response, and transmitting an ACK signal in the direction;
Before when Noriko station receives the ACK signal from the master station, initial construction method of a wireless communication network system is characterized in that a step of registering the direction of the front Kioyakyoku.   A mobile station that is the parent station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, an interference determination unit that determines whether or not interference occurs in the RF signal, and a network control unit that controls timing at which the transmission / reception unit transmits and receives based on a determination result of the interference determination unit A communication control unit having
  When initially building a wireless communication network system,
  Waiting for a certain time after transmitting the beacon signal;
  When a reception response is received from the slave station that has received the beacon signal while waiting for the predetermined time, the direction of the slave station that has transmitted the reception response is registered, and an ACK signal is transmitted in that direction. Steps,
  Transmitting the second beacon signal when the reception response cannot be received while waiting for the predetermined time;
  When the slave station that has received the second beacon signal receives a second reception response that is transmitted at different timings, it registers the direction of the slave station that has transmitted the second reception response, and Transmitting a ACK signal in a direction.   A mobile station that is the slave station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, and a communication control unit that includes a network control unit that controls the timing at which the transmission / reception unit transmits and receives,
  When initially building a wireless communication network system,
  When receiving a beacon signal transmitted by the master station, waiting for a predetermined time after returning a reception response to the master station;
  When receiving the ACK signal transmitted by the parent station that has received the reception response while waiting for the predetermined time, registering the direction of the parent station;
  When receiving the second beacon signal transmitted by the master station when the ACK signal cannot be received while waiting for the predetermined time, and then transmitting the second reception response at different timings, respectively. When,
  And a step of registering a direction of the master station when receiving an ACK signal from the master station in response to the second reception response.   A mobile station that is the parent station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, an interference determination unit that determines whether or not interference occurs in the RF signal, and a network control unit that controls timing at which the transmission / reception unit transmits and receives based on a determination result of the interference determination unit A communication control unit having
  When initially building a wireless communication network system,
  Waiting for a certain time after transmitting the beacon signal;
  When a reception response is received from the slave station that has received the beacon signal while waiting for the predetermined time, the direction of the slave station that has transmitted the reception response is registered, and an ACK signal is transmitted in that direction. And steps to
  After the slave station that has received the beacon signal returns the reception response, the reception response from another slave station is received by another antenna directed in a direction 180 ° symmetrical to the direction in which the reception response is returned. Registering the direction of the slave station that transmitted the second reception response when receiving the second reception response transmitted by the slave station, and transmitting an ACK signal in the direction;
  When receiving the second reception response transmitted by the slave station that has returned the reception response when the ACK signal from the parent station cannot be received while waiting for the predetermined time, the second reception is performed. And registering the direction of the slave station that has transmitted the response, and transmitting an ACK signal in that direction.   A mobile station that is the slave station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, and a communication control unit that includes a network control unit that controls the timing at which the transmission / reception unit transmits and receives,
  When initially building a wireless communication network system,
  When the beacon signal transmitted by the master station is received, a reception response is returned to the master station, and then a certain time is waited, and another antenna is directed in a direction 180 degrees symmetrical to the direction in which the slave station returns. Waiting for the reception response from another slave station;
  Transmitting a second reception response to the parent station when the reception response from another child station is received by another antenna;
  A step of transmitting a second reception response to the parent station when the ACK signal from the parent station cannot be received while waiting for the predetermined time;
  And a step of registering a direction of the master station when the ACK signal is received from the master station.   A mobile station that is the parent station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, an interference determination unit that determines whether or not interference occurs in the RF signal, and a network control unit that controls timing at which the transmission / reception unit transmits and receives based on a determination result of the interference determination unit A communication control unit having
  When initially building a wireless communication network system,
  Waiting for a certain time after transmitting the beacon signal;
  When a reception response is received from the slave station that has received the beacon signal while waiting for the predetermined time, the direction of the slave station that has transmitted the reception response is registered, and an ACK signal is transmitted in that direction. And steps to
  After the slave station that has received the beacon signal returns the reception response, the reception response from another slave station is received by another antenna directed in a direction 180 ° symmetrical to the direction in which the reception response is returned. Registering the direction of the slave station that transmitted the second reception response when receiving the second reception response transmitted by the slave station, and transmitting an ACK signal in the direction;
  The local station that has received the reception response from another slave station via another antenna has identified the other slave station that has been transmitted from the received reception response and has transmitted to the other slave station. Registering the direction of the slave station that has transmitted the second reception response and transmitting an ACK signal in that direction when receiving a second reception response transmitted by another slave station that has received The mobile station characterized by performing.   A mobile station that is the slave station of a wireless communication network system that communicates by a time division multiplexing method between a plurality of mobile stations composed of a single master station and a plurality of slave stations,
  An antenna unit having a variable directivity antenna and capable of directing a desired direction;
  A transmitting / receiving unit that transmits and receives RF signals to and from the antenna unit;
  An antenna control unit that controls a beam directing direction of the antenna unit, and a communication control unit that includes a network control unit that controls the timing at which the transmission / reception unit transmits and receives,
  When initially building a wireless communication network system,
  When the beacon signal transmitted by the master station is received, a reception response is returned to the master station, and another antenna is directed to a direction 180 ° symmetrical to the direction returned by the slave station. Waiting for the reception response from the station;
  When the reception response from another child station is received by another antenna, a second reception response is transmitted to the parent station, and another child station transmitted from the reception response is identified and separated. Sending own station information to the slave station of
  A step of transmitting a second reception response to the master station when the local station information is received;
  And a step of registering a direction of the master station when the ACK signal is received from the master station.

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