JPS5926147B2 - Digital information transmission method for mobile subscribers of wireless communication networks - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a wireless communication network in which a plurality of wireless concentration stations are provided,
The frequency arrangement of the radio concentrators was determined so that the radio concentrators were arranged in a cell-like manner, the radio concentrator areas overlapped, and there was almost no interference from the same channel within the radio concentrator area, including the border areas. , relates to a digital information transmission system for mobile subscribers of a wireless communication network.

Radio communication networks of this type are known, for example, from US Pat. This is different from non-public land mobile radio.

Mobile telephone subscribers of public land mobile radios are connected to the switching center of the public telephone communication network via radio exchanges; subscribers of non-public land mobile radios are In addition to organizations and emergency disaster relief organizations, there are also industrial entities such as taxis, transportation, industry, commerce, and mining.Mobile radio has recently become popular, and the number of subscribers is also increasing.
Therefore, it is an undeniable fact that when there are many subscribers, the configuration of known wireless communication networks is no longer sufficient. Subscribers are assigned to various radio concentrators on a semi-informed basis depending on their geographical situation. Therefore, the allocation of subscribers will be determined without considering optimal reachability. Furthermore, when forming a connection from a wireless concentrator to a subscriber, the wireless concentrator designates and allocates an empty channel.Therefore, subscriber wireless communication conditions such as same-channel interference and adjacent channel interference are hardly taken into consideration. When a large number of calls and connection requests occur during peak communication, there is a drawback that the possibility of blockage increases rapidly even if there are empty channels. Furthermore, the mechanism of the known wireless communication system has the drawback that network configuration functions are lost during communication by a blocked subscriber.The basic problem of the present invention is to solve the drawback of the known wireless communication system. According to the present invention, this problem is solved in the following manner. Information related to communication network functions is exchanged between subscribers and radio concentrators in individual radio concentrator areas that operate in accordance with upper level clock synchronization, using functional channels, and from the radio concentrators. The functional channel sent to the subscriber periodically sends out an information block containing the identification information of the radio concentrator and information related to the communication load status of the radio concentrator, and furthermore the information block of the radio communication network of the radio concentrator. Other information related to the functionality is time-division multiplexed and sent subsequent to the information block, so that an active subscriber receives the functionality channel and obtains information from said radio. Taking into account information related to the communication load state of the concentrator, it is possible to judge which wireless concentrator area should be changed and when, based on the wireless technology situation in which the concentrator is located;
Then, the subscriber contacts the radio concentrator via the functional channel to carry out the above determination. As described above, in the present invention, the subscriber in the active state first contacts the radio concentrator that is available for reception. receive information from the functional channels in the area, use this information to determine which wireless concentration area can ensure sufficient communication quality for later communications, and then The subscriber then becomes attached to the radio concentration area and continues to receive and obtain information from the functional channel of the radio concentration area to which it belongs, checking whether the radio concentration area is still suitable. .

For example, if a mobile subscriber moves and the radio concentrator area is no longer suitable, the subscriber can use the information obtained by receiving functional channels from other radio concentrators to find another more suitable radio concentrator. The present invention is based on the recognition that, by using a common functional channel, communication in a wireless communication network can be Functional channels not only significantly simplify the exchange of information necessary to control the flow, but also speed up the flow of functional operations in a wireless communication network when there are a large number of subscribers. In addition, the wireless concentrator transmits information related to the channels displayed as free channels to the subscriber via the functional channel, and selects the most suitable working channel based on the subscriber's own wireless technology status. 〇The subscriber can select the radio technology of the various radio concentrators from the field strength and phase jitter of the receiving function channel or simply the phase jitter, taking into account adjacent channel interference and same channel interference. It would be advantageous to configure the system to determine whether the reachability of the wireless communication network is good or bad. This is because information related to the functionality of the wireless communication network is transmitted between the subscriber and the wireless concentrator via the functional channel. 〇According to the present invention,
A subscriber who has applied for a radio concentrator in a radio concentrator area, after applying, receives information related to vacant working channels that is continuously reported from the radio concentrator via the functional channel, and receives the latest applicable information. The information is stored, and when the subscriber wishes to connect, the subscriber checks the wireless technology availability of the working channel, which the latest information displays as a free channel, and selects the most suitable free working channel. As information related to the functionality of the radio communication network, information indicating the most suitable free working channel is sent to the radio concentrator for connection formation.

If the subscriber is configured to check the radio technical availability of the working channel, which is displayed as a free channel from the radio concentrator, after the request for connection has arisen in this way,
However, on the other hand, the time from the reception of a call or the occurrence of a request for connection from a subscriber until the desired connection is formed is only that long. If a long 0 feature channel is configured such that a considerable time interval occurs between calls, the subscriber may have previously contacted the radio concentrator in the time interval that occurs between calls. It is advantageous to constantly check the radio availability of active channels reported as free channels by the network, to memorize a plurality of active channels that are found to be suitable, and to ensure that the memory is up-to-date. With such an arrangement, when a call to a subscriber occurs or the subscriber desires to connect, the subscriber immediately indicates at least one suitable free working channel to be used for forming the desired connection. Furthermore, according to the present invention, the subscriber notifies and requests the wireless concentrator via the functional channel for the most suitable free working channel that the subscriber specifies for connection formation, and the wireless concentrator According to the present invention, information related to the functions of the wireless communication network is exchanged in accordance with the clock synchronization between the subscriber and the upper layer. This is done using functional channels between the radio concentrators in each radio concentrator area, and the functional channels sent from the radio concentrators to the subscribers are used to communicate the identification information of the wireless concentrator area and the communication load of the wireless concentrator. It periodically transmits information blocks containing status-related information, and also time-division multiplexes information related to applications, application changes, location checks, blockages, calls, and similar various radio network functions. the active subscriber takes into account information related to the communication load state of the radio concentrator by receiving the functional channel and obtaining information from the functional channel; Based on the wireless technology situation in which the subscriber is located, it is possible to judge which radio concentration area the subscriber should belong to and when to change the radio concentration area to which the subscriber belongs. communicates with the radio concentrator via the functional channel to implement the above judgment, and transmits the location confirmation information in a superframe cycle spanning multiple frames to shorten the cycle of location confirmation over time. It can be adjusted according to the communication load that fluctuates over time. In this way, the flow of information exchange between the subscriber and the radio concentrator via the functional channel (4) can be made simple and time-saving. The reason why the location confirmation cycle is superframe is that it is generally sufficient to confirm the subscriber's location at a cycle that is much longer than the frame cycle of the functional channel. The number of subscribers is much larger than the number of working channels at each radio concentrator. Therefore, it is advantageous to configure the application place in a super frame to accommodate such a large number of subscribers who can apply.Furthermore, according to the present invention, applications from subscribers to the radio concentrator and calls, a predetermined number of discrete time slots are made available in each frame period of the functional channel of the radio concentrator, so that the subscribers are evenly distributed among all the time slots; A frame-synchronized and bit-synchronized scrambler is provided for each subscriber, and the scrambler selects the time slot to be used by the subscriber from among the time slots of the functional channel. By doing this, even if applications and calls from subscribers overlap in time, it is possible to prevent subscribers from blocking each other using a simple device. According to the present invention, even if the subscriber is busy, the subscriber does not lose the functionality of the wireless communication network.0 According to the present invention, the communication of the subscriber who is busy is connected to the functional channel. The information block is interrupted for the duration of the information block, and is used to confirm whether the subscriber can maintain the communication connection using the working channel currently used for communication, and to receive information on the functional channels of other wireless concentrators. Obtain information from this information alternately o This makes it possible to judge when to change the wireless concentrator area to which the subscriber belongs o Exchange of signals between the subscriber and the wireless concentrator station do,
It is also possible to periodically check whether the communication connection can be maintained using the current working channel for communication, and to release the connection when the signal is disconnected for several cycles of this check.

If a temporary storage device for communication signals is installed on both the subscriber and the transmitter/receiver side of the wireless concentrator, and the transmission speed in the wireless section is sped up, it is possible to receive the functional channels of other wireless concentrators and transfer information from the functional channels. There is no problem even if the communication connection is periodically interrupted and the continuity of communication is lost when obtaining the information. Even when the subscriber is busy, the subscriber constantly receives and obtains information from the functional channels of the various radio concentrators to ascertain his/her wireless technology status.

Therefore, the subscriber can identify when it is necessary to change the radio concentration area even when the subscriber is busy. When changing the radio concentration area, the subscriber must first change the wireless concentration area to another wireless concentration station that is deemed appropriate based on radio technology. The radio concentrator receives the channel information and obtains the information from it.Then, the radio concentrator applies to the radio concentrator and informs it of the vacant working channels it deems appropriate.The radio concentrator responds to this report by sending a signal to switch the subscriber to a standby state. send. In the standby state, the subscriber maintains the connection with the conventional wireless concentrator.0 The conventional wireless concentrator and the switched wireless concentrator maintain contact, and the switching technology connection is changed. After preparing the connection, the switched radio concentrator notifies the subscriber of the connection switching time. The subscriber and the wireless concentrator after switching switch connections at the same time. Repeat the switching time of the wireless concentrator and notify the subscriber so that the subscriber can check the remaining time until the switching time. If the subscriber receives at least one of the repeated notifications and allows the subscriber to perform the switching on time, it is possible to reliably change the radio concentration area. The invention will be explained in detail with reference to the drawings in accordance with embodiments.〇Figure 1 shows a wireless communication network configured in a cellular manner〇The wireless communication network in Figure 1 is an expandable mobile wireless communication network.〇The wireless concentrator is Arranged in cells.

Each radio concentrator has an area of average radius R. The average radius R is set to, for example, about 15 km.0 A wireless communication network of the type shown in Fig. 1 is, for example, ``Jaalbuch des Elektritsien Vernmeldebesens'', 21, 1970, Verlag Fair Wissenschaft und Leben, Georg Heidetzka. , Bad Vinsheim, pages 305-311 (see especially page 308, FIG. 1). The wireless communication network shown in FIG. 1 uses a frequency duplex method in the UHF band of about 450 MHz, for example. In this case, to obtain 100% electromagnetic compatibility, it is necessary to provide a frequency interval of 10 MHz or more between the transmitting band and the receiving band. As is clear from Figure 1, wireless communication networks Divided into allocation areas Each frequency allocation area has seven radio concentrators 1 to 7 In FIG. Radio concentrators F1 to F7 belong to the frequency allocation area of the block shown with the 0 right-sloping line. Radio concentrators P1 to B7 belong to the frequency allocation area of the block shown with the 0 left-slant line. 0 On the other hand, in the frequency allocation area of the block drawn with a horizontal line, there are 0 wireless concentrators Fl, to which wireless concentrators F'1 to F'7 belong.
F″1, Bi1 are schematically indicated with an x mark 0.On the other hand, the remaining radio concentrators are schematically indicated with an O symbol.Radio concentrator stations Fl, F″1,
The difference between Y'1 and the remaining radio concentrators lies in the following points; that is, radio concentrator Fl, F''1, y71 is a radio switching center that forms the connection between the radio concentrators and the public telephone communication network. It also has the function of a switching center.The structure of the frequency allocation area having seven wireless concentrators is the same.Furthermore, the frequency allocation of each is also the same.

The area numbers of the concentrators 1 to 7 are 1 to 7, respectively. Mobile radio subscriber T is 0 shown in area F1 in FIG.
In order to ensure the reach of the mobile radio subscriber T, the areas of the radio concentrators are overlapped with each other.

In this way, there will be no gap between the areas of wireless concentrators, so even in the overlapping areas of 0 wireless concentrators that can reliably reach mobile wireless subscriber T, it is possible to prevent co-channel interference from occurring as much as possible. The minimum level between the channel level and the noise that can occur depending on the minimum level difference between the channel level and the noise at the receiving point of the mobile wireless subscriber, even if the same channel interferes with a wireless concentrator station that is quite far away. The difference varies depending on the demodulation method.The frequency allocation in each frequency allocation area is determined by taking the above circumstances into consideration.In other words, the frequency allocation in the adjacent frequency allocation area is also taken into consideration when determining the upper frequency allocation. . Frequency allocation to individual radio concentrators is carried out as follows; that is, if the distance between radio concentrators having the same area number (and thus radio concentrators to which the same radio frequency is assigned) is sufficiently large and the minimum value is In the case of Figure 1, the minimum distance between wireless concentrators having the same area number is approximately 80 km. As is clear from FIG. 2, the transmission band X and reception band Y, which constitute a complete duplex system, each have 120 channel groups KG. The number of usable channels for each frequency allocation area is 840. One channel from each channel group KG is assigned to each radio concentration area 1 to 7. channels occupying the same position in each channel group KG are assigned to.

In FIG. 2, the channel group numbers of the transmission band As is clear from FIG. 2, the first channel of each channel group KG is assigned to the radio concentration area 1. The second channel of each channel group KG is assigned to the radio concentration area 6. The third channel of each channel group KG is assigned to the radio concentration area 4. Similarly 0 If frequencies are allocated in this way, the frequency interval between channels used in each radio concentration area will be equivalent to 6 channels 0 Therefore, the channels used in each radio concentration area Adjacent channel interference of the transmitters of the individual radio concentrators is unlikely to occur because there is sufficient frequency spacing between the channels allocated to directly adjacent radio concentrators in the individual frequency allocation areas. The interval is the maximum possible.If we calculate it based on communication theory, we can see that a wireless concentrator station that accommodates 120 channels can accommodate a maximum of 2,400 subscribers. In this section, we will explain the functional problems of a wireless communication network that operates in a complete duplex system using digital signal transmission using zero-order binary frequency modulation, which constitutes a wireless concentrator.

In the present invention, a specific functional channel is provided in the radio concentration area, and the subscribers solving the functional problems of the radio communication network receive this functional channel and obtain information from it. Then, using this functional channel, the subscriber applies for the radio concentration area or changes the radio concentration area, taking into account, for example, the communication load of the wireless communication network from the radio technology point of view specific to the subscriber. Furthermore, by using this functional channel, in addition to the above functions, functions such as location confirmation, blocking, and calling can also be realized. 〇 Wireless communication network that accommodates a small number of subscribers or a small number of wireless concentration areas. It would then be advantageous to combine all information related to the functionality of a wireless communication network into a composite functional channel.

In digital technology, information related to various functions can be easily accommodated in time-division multiplexed frames, so it is not a bad idea to combine them into composite function channels. As is clear from Figures 3 to 8, which schematically illustrate the flow of information related to the functionality of a wireless communication network when using a composite functional channel, the frame period of the composite functional channel 0K is τ. o The composite function channel 0K is divided into time slots ZS.

Three types of time slots C, A, and B are provided in the zero synthesis function channel 0K, which have the same time width of the time slots ZS. Time slot C indicates the start of the reference frame. The 0 information plotter K, whose information block is denoted by K, is the 0 time slot C that includes information for identifying the radio concentrator area and information related to the blockage state of the radio concentrator whose service area is the radio concentrator area. is followed alternately by time slot A and time slot B.
Different information is transmitted in time slot A and time slot B. Figures 3-8 schematically illustrate the flow of information related to the functions of the wireless communication network in relation to time t. In FIG. 8, the first letter indicates the station that is the entity related to the information, i.e. subscriber T or wireless concentrator Fi.
0, with the first character optionally followed by a number 0, while the second character designates the responding functional or communication channel 0, with the second character optionally followed by a number A number has been added. The functional channel of the wireless concentrator Fi is denoted by 0Ki, and the communication channel of the wireless concentrator Fi is denoted by GKi. In the diagrams showing the flow of information related to the functions of a wireless communication network, arrows indicate the direction of transmission, and transmitted signals are indicated by letters or a combination of letters and numbers. FIG. 3 schematically shows the flow of information when a subscriber attempts to apply for communication to a wireless concentrator. When the subscriber starts operating, the subscriber goes to step 7 in Figure 1.
Functional channels 0K1 to 0K7 of one radio concentration area 1 to 7
Check the suitability of radio technology using This confirmation operation is performed for subscriber T, for example, by confirming the suitability of radio technology using 0 function channels 0K1 to 0K7, which are illustrated by T-0K1 to T-0K7 in FIG. It is assumed that subscriber T is the most appropriate wireless concentration area judging from the radio technology situation in which subscriber T is located. In this case, subscriber T is After determining the compatibility or suitability of
It switches to the functional channel 0K2 of the radio concentrator area 2 and starts receiving the functional channel 0K2. At the start of the subsequent frame of functional channel F2-0K of radio concentration area 2, subscriber T receives an information block K of functional channel F2-0K. Then, the subscriber T who supplements the existing bit synchronization by frame synchronization further obtains information related to the blockage state of the radio concentrator F2 from the information content of the information block K. Contains information on how much of the acceptance capacity is currently in use, what the average degree of blockage of communication channels is, and whether all communication channels are currently occupied.Applications flooded to 0 application capacity. and/or the average degree of occlusion of the communication channel exceeds the limit value, subscriber However, in the example shown in Figure 3, it has been confirmed that there is still room for accepting applications from the information content of information block K of function channel F2-0K. Assuming 0, the subscriber T signals the provisional application signal EM to the time slot A on the transmission path of the functional channel T-0K2, and sends it to the radio concentrator F2.0 The radio concentrator F2 in the radio concentrator area 2 In response to the provisional offer signal EM, subscriber T sends an offer request signal MF by signaling time slot B (following time slot A) of function channel 0K2 of subscriber T. Then subscriber T sends a request signal MF to radio concentrator F2. At the next time slot B of the functional channel 0K, the application of the subscriber T to the radio concentrator F2 is completed by sending the subscriber application signal MT in response to the application request signal MF. It must receive channel F2-0K and note the presence or absence of a call to subscriber T or the free channel information. When a call to subscriber T occurs, this fact is sent via time slot B. On the other hand, the free channel information is sent via time slot A. Reading of the received information on the functional channel F2-0K to check whether there is a call to subscriber T or the free channel information is performed by the information program K.
It is interrupted every other frame at time slot C, which transmits the data. When reception and reading of information on functional channel F2-0K is interrupted, subscriber T uses functional channels 0K1 and 0K3 in the remaining wireless concentration areas 1, 3 to 7 other than wireless concentration area 2.
~0K7 0 and replaces it with the information block K of the wireless concentrator station F2 in the wireless concentrator area 2 that subscriber T applied for, and subscriber T confirms the reachability in terms of wireless technology 0 The information related to reachability obtained for each radio concentration area in this way is continuously averaged, and the average value is stored in the subscriber T. The reachability based on wireless technology in the wireless concentration area 2 for which subscriber T applied is
When the subscriber T confirms that the reachability in any of the remaining radio concentration areas is significantly lower than the wireless technology reachability, the subscriber T starts switching the radio concentration areas.

Furthermore, judging from the information content of the information block K sent from the wireless concentrator F2 for which subscriber T has applied, if there is a risk that the wireless concentrator F2 will be blocked due to time fluctuations in the communication load, that is, the communication Even if the average degree of blockage of the channel exceeds the limit value, subscriber T starts switching the radio concentration area. However, in that case, the radio concentration station to be connected by switching is not compatible with radio technology. The wireless concentrator station F2 exhibits good reachability and the average degree of occlusion of its communication channel
Subscriber T switches the radio concentration area only if the situation is better than the case of , and the switching of the radio concentration area is effective.
In order to minimize the situation where provisional application signals EM occur overlappingly in time, and therefore subscribers who have made provisional applications to the same radio concentrator at the same time block each other and are unable to apply, the subscribers are screened. The 0 scrambler, which is provided with a scrambler, works to distribute the provisional application signal EM sent from the subscriber to all time slots A as uniformly as possible.
The time slot A to be assigned to the subscriber's provisional application signal EM is determined depending on which time slot A is specified for the subscriber's provisional application signal EM. The scrambler operates in the same way even when changing the application to the concentrating station. 〇Figure 4 shows
In FIG. 4, which shows the flow of connection formation from subscriber T through radio concentrator F2 in radio concentrator area 2, subscriber T first receives information block K of functional channel 0K of radio concentrator F2. , continues to receive the applied functional channel 0K of the wireless concentrator F2.

Information related to the empty channel formed by the radio concentrator F2 is transmitted to the radio concentrator F2 via the time slot A which is two time slots behind the information block Kf.
Sent from 2. Subscriber T receives this time slot A. The information stored in time slot A is
It is shown by Information V is transmitted via each time slot A of the functional channel. However, in FIGS. 4 and 5 to 8, for the sake of simplicity, information is shown only where necessary for explaining the flow of each operation. In time slot B, which follows time slot A, subscriber T receives a call to subscriber T from functional channel 0K of radio concentrator F2.

This call is indicated by RF in FIG. On the basis of the information relating to free channels, which is constantly sent from the functional channels to the subscriber T in the rhythm of the frame period, the subscriber T always has an up-to-date status. Therefore, when the subscriber T receives the call RF, the subscriber T can immediately select an appropriate free channel from the set of free channels of the radio concentrator F2 (vacant channel selection FS). During free channel selection, subscriber T leaves the functional channel of radio concentrator F2. When the free channel selection FS is completed, subscriber T:
Through the time slot B of the functional channel, the wireless concentrator F2 selects an empty channel that is optimal in terms of wireless technology from the perspective of the subscriber T.
Report to. Then, it responds to the received call RF. The wireless concentrator F2 is the communication channel GK designated by the subscriber T.
It responds to the notification QT of an empty channel from the subscriber T using the signal QF. Subscriber T sends the report QT and sends the signal QF.
During the reception of , it switches to the communication channel GK. In this way, a connection is established with the subscriber T via the radio concentrator F2. Communication takes place between subscriber T and the subscriber who called subscriber T via radio concentrator F2. Fourth
In the figure, this state of communication is shown by a double-lined arrow and a diagonally lined portion of the communication channel that intersects with it. Subscriber T
Even if the wireless concentrator F is in a busy state, the subscriber T
Continue to check the reachability of the remaining wireless concentrators other than 2.

This is, on the one hand, to ensure that one's own connection is maintained, and on the other hand, to determine which remaining radio concentrator area to switch to if the reachability of the radio technology at radio concentrator F2 decreases. This is to determine. Therefore, wireless concentrator F
The radio-technical reachability of the remaining radio concentrators other than 2 is checked using the time slots C of the functional channels K and in rhythm with the frame period τ. In time slot C, which occurs for the first time after the connection is established, a signal MF is sent from the radio concentrator F2 to the subscriber T, and a signal MT is sent from the independent subscriber T to the radio concentrator F2. Subscriber T ends up on wireless network F
Receiving the signal MF from subscriber T2, radio concentrator F2 receives the signal MF from subscriber T
Upon receiving the signal MT from the radio concentrator F2, the subscriber T or the radio concentrator F2 confirms that the frame synchronization strength {still maintained and the communication strength between the radio concentrator F2 and the subscriber T {still connected confirm. On the other hand, if the subscriber T does not receive the signal MF over multiple time slots C, the communication connection from the subscriber T is automatically terminated. Also, the wireless concentrator F2 receives the signal MF over multiple time slots C. If not received, the communication connection is automatically released from the wireless concentrator F2. Then, at the next time slot C, the subscriber T leaves the communication channel GK and receives and obtains information from any of the functional channels of the remaining radio concentrators other than the radio concentrator F2. In FIG. 4, the period of time slot C is indicated by FP. As described above, the original communication is interrupted during the time slot C.

That is, communication via communication channel GK is interrupted during the time slot C period. Even if communication is interrupted in this way, it does not cause much trouble. This is because the transmission speed in the wireless section is high, and temporary storage devices for communication signals are provided on the transmitting and receiving sides for both the subscriber and the wireless concentrator. These temporary storage devices can be used to fill time gaps. When the calling subscriber side wants to terminate the communication, the radio concentrator F2 sends a release signal AF in the next time slot C via the communication channel GK. When the release signal AF arrives, the subscriber T sends back the release signal AT by means of two consecutive time slots A, B. As a result, the connection with subscriber T is released. On the other hand, when the called subscriber T terminates the communication, the subscriber T sends a release signal AT via the communication channel GK using the next time slot C, and the radio concentrator F2 terminates this release. In response to the signal AT, the following 2
Release signal A using two consecutive time slots A and B.
Send F. When the release signal AF is sent, at least the connection in the wireless section is released (see also FIG. 5 for the above). FIG. 5 shows the flow of operations when a subscriber T who has applied to the wireless concentrator F2 in the wireless concentrator area 2 makes a call requesting connection. In the example of FIG. 5, subscriber T is the calling subscriber. Subscriber T receives information V via scrambled time slot A of the functional channel. Information V is
Contains information related to empty channels from the perspective of the wireless concentrator F2. Upon receiving the information V, the subscriber T selects an empty channel from the set of empty channels provided by the radio concentrator F2 during the next time slot B (empty channel selection FS). In the free channel selection FS, the subscriber T selects the most suitable free channel from the perspective of the subscriber T in terms of wireless technology. This free channel is then reported to the radio concentrator via the functional channel. In FIG. 5, the notification of the selected free channel when the subscriber T is the calling subscriber is indicated by RT. The timeslot in which the notification RT with the call is sent is not immediately after the scrambled timeslot in which the information is to be read. After sending the message RT, the subscriber T leaves the functional channel and switches to the communication channel GK specified by the subscriber T. Upon receiving the notification RT, the radio concentrator F2 transmits the signal QF via the communication channel GK.
and respond. The connection is formed as described above,
Communication takes place as already explained in FIG. When the calling subscriber T wants to terminate the communication, the subscriber T sends a release signal AT in the next time slot C via the communication channel GK.

Upon receiving the release signal AT, the radio concentrator F2 responds by sending a release signal AF using two consecutive time slots A and B. This releases the connection. If the called party wants to terminate the communication, the called party's end-of-call indication is either confirmed at the radio concentrator or signaled via the switching network pre-connected to the radio concentrator. The radio concentrator is notified. If the called subscriber wishes to terminate the communication, the radio concentrator F2 is thus informed and sends a release signal AF via the communication channel GK using the next time slot C7. Upon receiving the release signal AF, subscriber T responds and sends two consecutive time slots A
, B to send the release signal AT. As a result, at least the connection in the wireless section is canceled. 4 and 5, after a call with subscriber T as the other subscriber occurs or after subscriber T makes a call, subscriber T selects an empty channel FS.
, and leave the feature channel.

As described above, the operation FS of receiving information and selecting an empty channel from a group of channels that the wireless concentrator reports as an empty channel can be executed in advance.
In this way, when a call is generated with subscriber T as the called subscriber or when subscriber T makes a call, the time required to establish a connection can be shortened. The radio concentrators must periodically check whether each subscriber subscribed to each radio concentrator is still reachable.

The flow of operations at that time is shown in FIG. In Figure 6,
Subscriber T first receives an information block K from time slot C of the functional channel. Then, after a period of several time slots has elapsed from the time slot C storing the information block K, an application request signal M is sent via the time slot B.
F is sent. Subscriber T receives this application request signal MF. The next time slot B responds by sending a signal MT. Subscriber T also receives information within the same frame period. The information is information related to free channels provided by the wireless concentrator. At the beginning of the next frame, subscriber T leaves time slot C of the functional channel and switches to the functional channel of one of the remaining radio concentration areas. Subscriber T receives and obtains information from these functional channels and verifies radio reachability. The above operations are repeated for each frame in the manner described above. The subscription signal MF is not generated for each individual frame. They occur at time intervals much longer than the frame period. Since there are a large number of subscribers who can apply to an individual radio concentrator, which is much larger than the number of time slots B that can be used in an individual frame for these subscribers, the period of occurrence of the application request signal MF is It has no choice but to be longer than the frame period. Therefore, the transmission cycle of the subscription request signal MF sent to the subscriber who has subscribed spans several frame periods. In contrast to the functions of wireless communication networks such as calling, identification, subscription, etc., this is sufficient. The location confirmation may be performed in a long cycle spanning several frame periods. FIG. 7 shows the flow of operations when a subscriber T who applied to the wireless concentrator F2 in the wireless concentrator area 2 changes his application to another wireless concentrator.

However, subscriber T is not busy. In the case of FIG. 7, subscriber T who applied to wireless concentrator F2 must change his application to wireless concentrator F2 in wireless concentrator area 7 in order to maintain reachability based on wireless technology. Assume that you have confirmed during a routine check that this is not the case. Subscriber T therefore receives timestamp C of the functional channel of radio concentrator F7 at the beginning of the next frame. Then, it receives an information block K including information indicating the blocked state of the communication channel of the wireless concentrator F7 and information identifying the wireless concentrator F7. Subscriber T then immediately goes to radio concentrator F2.
Return to feature channel. In the scrambled subsequent time slot A, the subscriber T sends out a subscription change signal UM via the functional channel of the radio concentrator F7. Upon receiving the offer change signal UM, the radio concentrator F7 responds by sending an offer request signal MF in a subsequent time slot B.
Upon receiving the application request signal MF, the subscriber T responds by saying,
The next time slot B sends the application signal MT. This completes the application for subscriber T to the wireless concentrator F7. The subsequent flow of operations is the same as that shown in FIG. There is no need to notify the wireless concentrator F2 of changes in the application. Wireless concentrator F
This is because if subscriber T does not respond to the application request from F2 within a predetermined time, subscriber T will be automatically deleted from the memory of wireless concentrator F2. However, it is also possible to directly exchange information between the wireless concentrator F7 and the wireless concentrator F2 to erase the subscriber T from the memory of the wireless concentrator F2. 8th
The figure shows the flow of operations when a busy subscriber T changes his application to a wireless concentrator.

In FIG. 8, subscriber T changes his application from wireless concentrator F2 to wireless concentrator F7. Therefore, in FIG. 8, the communication channel GK sent out from the radio concentrator F2 to the subscriber T is schematically shown directly below the column of time slots ZS. Communication is performed in the hatched areas where the communication channels GK intersect. However, this communication is carried out during time slot C with signal MF.
Interrupt to send. From subscriber T to wireless concentrator F
The communication channel GK sent to GK 2 is indicated schematically in the column from the top. When subscriber T confirms the need to change the application to the radio concentrator and decides to change the application to radio concentrator F7, subscriber T leaves communication channel GK at the beginning of the frame and during time slot C. The information block K of the functional channel of the radio concentrator F7 is received. Subscriber T then receives information V. This information is related to the free channel provided by the radio concentrator F7 and is sent by the scrambled time slot A. Then, during the next time slot B, the subscriber T checks the radio technical suitability of each channel of the channel group that the radio concentrator F7 designates as an empty channel. In FIG. 8, this confirmation operation period is indicated by FS. Subscriber T then goes to wireless concentrator F.
Call R by time slot A via function channel 7.
Send TU. The call RTU is used to change the applied wireless concentrator while maintaining the current connection, and also displays the desired free channel specified by the subscriber T. Upon receiving the call RTU, the radio concentrator F7 responds by sending a waiting signal W via the desired communication channel. Time slot A above
,B to change the applied wireless concentrator station, communication will be interrupted for a short time. Subscriber T then returns to the communication channel of radio concentrator F2. and keep the connection intact.
In FIG. 8, the situation during this period is shown by double-lined arrows. For the arrival of subsequent frames, subscriber T sends a message to radio concentrator F.
During the time slot C, the presence or absence of the waiting signal W from the radio concentrator F7 is checked on the communication channel provided by F7 to the subscriber T. Radio concentrator F7 sends out a waiting signal W via time slot C until a switching connection from radio concentrator F2 to radio concentrator F7 is established. During the time slot C in which the waiting signal W is sent out, the subscriber T sends out the signal MT. Radio concentrator F7 connects subscriber T to time slot C.
Upon receiving the signal MT transmitted during
thereby confirms that the connection with subscriber T is still maintained. Once the new connection is established, the radio concentrator F7 sends a signal C3 to the subscriber T in the next time slot C via the communication channel. Signal C3 signals that the switching of connections occurs at the beginning of the next next arriving frame. In time slot C of the next frame, signal C2 is sent out from radio concentrator F7. Signal C2 informs subscriber T that the switching of the connection will occur at the beginning of the next arriving frame. At the beginning of the next frame, the radio concentrator F7 sends a signal C1 to the subscriber T. Signal C1 indicates the time of connection switching. Connection switching is completed in the above manner.

The connection is now established and maintained via the communication channel of the radio concentrator F7. Signals C3, C2, Cl are a kind of countdown.

If you use a countdown type signal like this, the signal C2
If one of the signals C3 and C3 is received, the subscriber T can be reliably switched even if the switching signal C1 is received by mistake. 9 and 10 show embodiments of a wireless concentrator and a subscriber.

The radio concentrators and subscribers of FIGS. 9 and 10 are used for dual-power digital signal transmission. FIG. 9 is a block diagram of the radio concentrator.

The wireless concentrator shown in FIG. 9 is used in the wireless communication networks shown in FIGS. 1 and 2, and has 120 communication channels GK. In FIG. 9, only a portion of the communication channel GKl among the 120 communication channels GK is illustrated. Communication channel G
The portions K2 to GKl2O are only shown briefly. The communication channel GK is of course used not only as a communication channel but also as a data transmission channel or other information transmission channel. The channel equipment of each communication channel has a transmitting/receiving branching circuit WE. The transmitter S and the receiver E are connected to an antenna (not shown) via a transmitting/receiving branching circuit WE.
Transmitter S and receiver E are connected to synthesizer SY. In the synthesizer SY, frequencies assigned to both transmission directions of the channel GKl are formed. A regenerator RG is connected downstream to the output side of the receiver E. Regenerator RG regenerates the received signal and adjusts its timing. Regenerator RG
A delay time standardization circuit LN is connected downstream. The delay time standardization circuits 1 and N function to standardize the received frame phases, which take various values, to the frame phase of the wireless concentrator. The received frame phase varies within a maximum range of about ±3 bits. In this way, phase shifts associated with transmission can be reduced. The secret device VS is provided in both the transmission path and the reception path. In wireless telephones, the secrecy of communication cannot be maintained unless the communication signal is polarized and transmitted. Therefore, in the 0 reception path in which such a secret device VS is provided, a speed conversion device GW is connected downstream of the secret device S. In the external power transmission path, the speed conversion device GW is connected to the secret device S.
is prefixed. In the transmission direction, the speed conversion device GW changes the bit rate of the information to be transmitted to, for example, 4.8Kbit.
/S to 5.4Kbit/S. This creates gaps in the continuous flow of information before speed conversion. Signaling information is inserted into the gap corresponding to time slot C of the frame of the functional channel. These signaling information are coordinated by the data security device DS. In the receiving path, the signaling information following the signal is separated from the signal by a secure device S. This makes the signal flow discontinuous. This discontinuous signal flow is converted from a bit rate of 5.4 Kbit/S to a bit rate of 4.8 Kbit/S by a speed converter GW. Therefore, the original continuous signal flow is restored. The data security device DS forms the signaling information of the transmitted signal into a signaling block and takes measures to ensure that it is protected against the occurrence of errors.

In the receive path, the data security device DS receives the incoming signaling block, detects errors in the transmission, and corrects them if necessary. A signal processing device SV is connected to the data security device DS. The signal processing device S is in charge of various functions of the wireless communication network that should be executed as a routine. For example, the signal processing device S carries out identification and application processes for signal repetition and disconnection. When the operating state changes, the signal processing device S notifies the corresponding functional unit that cooperates with the radio concentrator control device FS. The radio concentrator controller FS works as a higher level device of the functional units. When the operating state is changed, a notification to that effect is sent to the signal processing device S as a signal. In FIG. 9, the common clock device TZ is shown schematically.

The common clock device TZ forms the clock and frame and supplies the clocks to the various components of the radio concentrator. Derive the starting conditions for the functional unit ESB.

When the formation of a connection begins between a radio concentrator and a subscriber, the functional unit ESB derives the conditions for starting the operation of the secure device S from the transmitted subscriber number. In this way, it is not necessary to provide a large number of storage devices for the decoding keys of all the subscribers in the radio communication network. The functional unit K is responsible for managing the active channels of the radio concentrator.

Information related to the free/busy status of 120 channels is written into the functional unit K and managed by the functional unit K. Functional unit K only indicates as free channels those channels which are not occupied by a useful signal and which do not have a noise level exceeding a permissible value. Information relating to available free channels is sent to the subscriber via functional channel 0K. Functional channel 0K also differs from communication channel GKi in terms of configuration.

That is, the secret device VS is not required in the functional channel 0K.
This is because there is no need to polarize information related to the functions of the wireless communication network. Function channel 0K is also speed converter G
Does not have W. In both transmission directions, sending and receiving, the information flow is directly established by the data security device DS. Functional unit SS controls the transmission.

That is, the functional unit SS connects the communication channels KGl to KGl.
2O's 120 transmitters S are attached to 0N/0FF as necessary. Functional unit KE generates information block K.

Information block K is sent to the subscriber at the beginning of each frame of functional channel 0K. The information block K includes identification information of the radio concentrator and information related to the busy state of the radio concentrator. Information related to the blockage status of the wireless concentrator includes: how many applications have been received by the wireless concentrator, what is the average degree of blockage of communication channels, and whether all communication channels are currently blocked. This is the information to display. Information related to the average degree of blockage of the communication channel provides the subscriber with a criterion for whether or not to convert the subscription to another wireless concentrator. The information block K also displays the frame phase to the subscriber. The information block K can also store useful information other than the above information. The functional unit R controls the sending and receiving of calls, and disconnects the subscriber.
Responsible for communication with subscribers regarding connection formation/termination.

Functional unit MN acts as an application-related device.

That is, the functional unit MN stores provisional applications and application changes, continuously confirms the location, and deletes the subscriber from its memory. If the subscriber's location cannot be confirmed even after repeated location checks several times, or if the exchange receives a deletion or cancellation instruction, the subscriber will be deleted or deleted. A multiplexer MUX of 120 communication channels GKl to GKl2O is provided between the switching center MSt and the switching center MSt.

The main parts of the switching center MSt include a signaling device SE, a switch frame KF, and a control device SW. Since switching center MSt also cooperates with other functional units, this is indicated schematically in FIG. 9 by three arrows. FIG. 10 shows an embodiment of a subscriber.

The subscriber has a transmitting/receiving duplexer WE in FIG.
The transmitting/receiving duplexer WE is assigned to the transmitter S and the receiver E1. The transmitter S and the receiver E1 are connected to the antenna AN1 via a transmitting/receiving duplexer WE. Since the die punch force method is used, the subscriber is provided with a second receiver E2. Receiver E2 cooperates with antenna AN2. Antenna AN2 is located apart from antenna ANl. Receiver E
The output sides of I and E2 are connected to a die punch synthesizer DC. The die punch synthesizer DC detects the reception level of the receiver E1 and the reception level of the receiver E2, and detects signal jitter. A synthesizer SY is provided in the transmitter S and the receivers El, E2 corresponding to the channel device of the communication channel GK of the wireless concentrator shown in FIG.

Synthesizer SY generates several desired frequencies.
The synthesizer SY is separated from the functional unit SYS. The common clock device TZ is synchronized by a regenerator RG.
The regenerator RG is downstream connected to the die-punch synthesizer DC. Corresponding to the channel devices of the communication channels GKl to GKl2O in FIG. 9, the subscriber has a secret device S, a rate conversion device GK, and a data security device DS common for transmission and reception. For the selection of the radio concentrator, the die-punch combiner DC cooperates with the functional unit FA.

In the functional unit FA, reception levels and functional channel jitter information from various radio concentrators are collected and evaluated in order to select the most suitable radio concentrator for provisional applications and application changes. The die punch synthesizer DC is further equipped with a functional unit Z.
Collaborate with SOFE.

In the functional unit FE, information related to vacant working channels reported from the radio concentrator via the functional channels is
It is evaluated based on the subscriber's wireless technology viewpoint, and the latest information is stored. When selecting a vacant working channel, the subscriber selects the most suitable working channel each time based on the stored information. Functional unit RVI controls the sending and receiving of calls.

Functional unit RV' is provided with a scrambler as described above. Functional unit MN7 is a signaling device necessary for location confirmation.

Changes to your application can also be made using this functional unit! It is done through. Functional units MN7, R7, SYS, FA, FE cooperate with a higher-level common control unit ZS.

The common control device ZS consists of a microprocessor, for example. The subscriber's transmitter M and receiver H are respectively connected to the input side or the output side of the speed conversion device GW via an AD converter A/D or a DA converter D/A.

The busy tone generator BT is controlled by a common control device ZS.
The busy tone generator BT operates if, for various reasons in radio technology, it is not possible to establish a connection or the connection is broken.
An analog-to-digital converter A/D downstream of the handset M cooperates with an empty tone generator FTO. The vacancy indicator tone generator FTO is connected to the common control device ZS. A ring tone generator RTO, which is attached to the common control device ZS, has an acoustic paging device L for acoustically indicating a call from a radio concentrator to a subscriber.
Selection keyboard W for manual operation of subscriber equipment
There is a T.

The selection keyboard WT includes an optical display device AZ, a dial memory WS, and an operation control device BS. Operation control device BS
is connected to a common control device ZS. The devices schematically shown to the left of the dashed line in FIG. 10 are data communication devices.

The data communication device and the privacy device can be used selectively. The data communication device consists of a data transmission device DU and a data terminal device DE.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a wireless communication network, Fig. 2 is a diagram illustrating the ratio of channel frequencies in the frequency allocation area of the 5U wireless communication network shown in Fig. 1, and Fig. 3 is based on the digital information transmission power formula of the present invention. FIG. 4 is a schematic diagram illustrating the flow of information during a subscription between a subscriber and a wireless concentrator; FIG. FIG. 5 is a schematic diagram showing the information flow when a call is made between a subscriber and a wireless concentrator using the digital information transmission system of the present invention. FIG. A schematic diagram showing the flow of information when confirming the location between a subscriber and a wireless concentrator using the digital information transmission method; FIG. FIG. 8 is a schematic diagram showing the flow of information when changing the applied wireless concentrator station, and FIG. A schematic diagram showing the flow of information when changing the wireless concentrator from a subscriber, FIG. 9 is a block diagram of an embodiment of the wireless concentrator of the digital information transmission system of the present invention, and FIG. 10 is a diagram showing the flow of information when changing the wireless concentrator of the present invention. 1 is a block diagram of a transmit power subscriber embodiment; FIG.

Claims (1)

[Claims] 1. A wireless communication network is provided with a plurality of wireless concentration stations, the wireless concentration stations are arranged in a cellular manner, the wireless concentration station areas overlap, and the wireless concentration stations including the boundary area In a digital information transmission system for mobile subscribers of a wireless communication network in which the frequency allocation of wireless concentrators is determined so that there is almost no co-channel interference within the area, the exchange of information related to the functions of the wireless communication network. is performed between the subscriber T and the radio concentrators Fi in the individual radio concentrator areas 1 to 7 that operate in accordance with the clock synchronization of the upper layer, using the functional channel OKi,
The functional channel OKi sent from the wireless concentrator Fi to the subscriber T periodically sends out an information block K containing identification information of the wireless concentrator areas 1 to 7 and information related to the communication load state of the wireless concentrator Fi. In addition, wireless concentration area 1 to 7
time-division multiplexing and subsequent transmission of other information related to the functionality of the radio communication network in an information block, such that an active subscriber T receives the functionality channel and obtains information from the functionality channel. In particular, in consideration of the information regarding the communication load state of the wireless concentrator, it is possible to determine which wireless concentrator area 1 to 7 the wireless concentrator should belong to and the wireless concentrator to which it belongs based on the wireless technology situation in which the wireless concentrator is located. The subscriber T then contacts the radio concentrator Fi via the functional channel OKi,
A digital information transmission system for mobile subscribers of a wireless communication network, characterized in that the judgment is put into practice. 2 Subscriber T receives the functional channel, obtains the field strength and phase jitter of the receiving functional channel as information from the functional channel, and calculates the field strength and phase jitter of the receiving functional channel from the subscriber's own radio. Taking into consideration the technical situation, the size and size of the reachability of various wireless concentrators Fi from the field strength and phase jitter of the receiving function channel in terms of wireless technology are determined.
A digital information transmission system for mobile subscribers of a wireless communication network according to claim 1, wherein the quality is judged. 3 Subscriber T receives the functional channel and obtains the phase jitter of the received functional channel as information from the functional channel,
Considering the phase jitter of the reception function channel as the radio technology situation of the subscriber, and judging from the phase jitter of the reception function channel, the size and quality of the radio technology reachability of various wireless concentrators Fi. A digital information transmission system for mobile subscribers of a wireless communication network according to claim 1. 4. A wireless communication network has multiple wireless concentration stations, the wireless concentration stations are arranged in a cellular manner, the wireless concentration station areas overlap, and most co-channel interference occurs within the wireless concentration station area, including border areas. In a digital information transmission system for mobile subscribers of a wireless communication network, in which the frequency allocation of wireless concentrators is determined, the exchange of information related to the functions of the wireless communication network is Functional channel OKi is used between wireless concentrators Fi in individual wireless concentrator areas 1 to 7 that operate according to clock synchronization, and functional channel O is sent from wireless concentrator Fi to subscriber T.
Ki periodically sends out an information block K containing identification information of the wireless concentrator areas 1 to 7 and information related to the communication load state of the wireless concentrator Fi, and further transmits the information block K that includes the identification information of the wireless concentrator areas 1 to 7 and the information related to the communication load state of the wireless concentrator Fi, and further updates the wireless communication network of the wireless concentrator areas 1 to 7. time-division multiplexing and subsequently sending out other information related to the functionality of the information block, such that the active subscriber T receives the functionality channel and obtains information from the functionality channel. , taking into account the information related to the communication load state of the wireless concentrator, and determining which wireless concentrator area 1 to 7 it should belong to and the wireless concentrator area 1 to which it belongs based on the wireless technology situation in which it is located. .about.7 when to make the change, then the subscriber T contacts the radio concentrator Fi via the functional channel OKi,
The above judgment is put into practice, and the radio concentrator area 1
Subscriber T who applied to wireless concentrator Fi in ~7.
Following the application, the relevant radio concentrator F via the functional channel
i receives the information related to the free working channel GKi that is continuously reported from
When a person wishes to connect, the latest information is available on the available channel GKi.
Subscriber T checks the radio technology availability of the working channel displayed as
as information related to the functionality of the wireless communication network.
Digital information transmission system for mobile subscribers of a radio communication network, characterized in that information indicating the most suitable free working channel GKi is sent to a radio concentrator Fi for connection formation. 5. A wireless communication network has multiple wireless concentration stations, the wireless concentration stations are arranged in a cellular manner, the wireless concentration station areas overlap, and most co-channel interference occurs within the wireless concentration station area, including border areas. In a digital information transmission system for mobile subscribers of a wireless communication network, in which the frequency allocation of wireless concentrators is determined, the exchange of information related to the functions of the wireless communication network is Functional channel OKi is used between wireless concentrators Fi in individual wireless concentrator areas 1 to 7 that operate according to clock synchronization, and functional channel O is sent from wireless concentrator Fi to subscriber T.
Ki periodically sends an information block containing the identification information of the wireless concentrator areas 1 to 7 and information related to the communication load state of the wireless concentrator Fi, and further transmits the information block to the wireless communication network of the wireless concentrator areas 1 to 7. time-division multiplexing and subsequently sending out other information related to the functionality of the information block, such that the active subscriber T receives the functionality channel and obtains information from the functionality channel. , taking into account the information related to the communication load state of the wireless concentrator, and determining which wireless concentrator area 1 to 7 it should belong to and the wireless concentrator area 1 to which it belongs based on the wireless technology situation in which it is located. .about.7 when to make the change, then the subscriber T contacts the radio concentrator Fi via the functional channel OKi,
The above judgment is carried out, and furthermore, the subscriber T who has applied to the wireless concentrator Fi in the wireless concentrator areas 1 to 7 receives continuous notifications from the wireless concentrator Fi via the functional channel after applying. receive information related to the free working channel GKi, store the latest information, and when the subscriber T wishes to connect, the latest information is stored in the free channel GKi.
Subscriber T checks the radio technology usability of the working channel indicated as i and selects the most suitable free working channel GK.
i, and the subscriber T requests by informing the radio concentrator Fi via the functional channel the optimal free working channel GKi which the subscriber T specifies for connection formation;
A digital information transmission system for a mobile subscriber of a radio communication network, characterized in that the radio concentrator Fi responds to the request via the specified working channel GKi. 6 A wireless communication network has multiple wireless concentration stations, the wireless concentration stations are arranged in a cellular manner, the wireless concentration station areas overlap, and most co-channel interference occurs within the wireless concentration station area, including the border area. In a digital information transmission system for mobile subscribers of a wireless communication network, in which the frequency allocation of wireless concentrators is determined, the exchange of information related to the functions of the wireless communication network is Functional channel OKi is used between wireless concentrators Fi in individual wireless concentrator areas 1 to 7 that operate according to clock synchronization, and functional channel O is sent from wireless concentrator Fi to subscriber T.
Ki periodically sends out an information block K containing identification information of the radio concentrator areas 1 to 7 and information regarding the communication load status of the radio concentrator Fi. Various information related to functions of a wireless communication network similar to the above are time-division multiplexed to form an information block K.
, the subscriber T in the active state receives the functional channel and obtains information from the functional channel, taking into account the information related to the communication load state of the radio concentrator, Based on the wireless technology situation in which the user is located, it is possible to judge which wireless concentration area 1 to 7 to which the user should belong and when to change the wireless concentration area 1 to 7 to which he/she belongs, and then The subscriber T contacts the wireless concentrator Fi via the functional channel OKi to implement the above judgment, and transmits the location confirmation information in a super frame cycle spanning multiple frames to confirm the location. 1. A digital information transmission system for mobile subscribers of a wireless communication network, characterized in that the cycle can be adjusted according to a time-varying communication load. 7. A wireless communication network has multiple wireless concentration stations, the wireless concentration stations are arranged in a cellular manner, the wireless concentration station areas overlap, and most co-channel interference occurs within the wireless concentration station area, including the border area. In a digital information transmission system for mobile subscribers of a wireless communication network, in which the frequency allocation of wireless concentrators is determined, information related to the functions of the wireless communication network is exchanged between subscriber T and the upper clock. Radio concentrators F in individual radio concentrator areas 1 to 7 that operate according to synchronization
i, using the functional channel OKi, and sent from the wireless concentrator Fi to the subscriber T.
i periodically sends out an information block K containing identification information of the wireless concentrator areas 1 to 7 and information related to the communication load status of the wireless concentrator Fi, and further handles application, application change, location confirmation, blocking, and call processing. and information related to various similar wireless communication network functions are time-division multiplexed to form an information block K.
, the subscriber T in the active state receives the functional channel and obtains information from the functional channel, taking into account the information related to the communication load state of the radio concentrator, Based on the wireless technology situation in which the user is located, it is possible to judge which wireless concentration area 1 to 7 to which the user should belong and when to change the wireless concentration area 1 to 7 to which he/she belongs, and then The subscriber T contacts the wireless concentrator Fi via the functional channel OKi to implement the above judgment, and transmits the location confirmation information in a super frame cycle spanning multiple frames to confirm the location. can be adjusted in accordance with the time-varying communication load, and furthermore, for applications and calls from subscribers T to the radio concentrator Fi, the cycle is adjusted in each frame period τ of the functional channel of the radio concentrator Fi. A predetermined number of discrete time slots are made available, and subscribers T are uniformly distributed among all the time slots.Furthermore, each subscriber T is provided with a frame-synchronized and bit-synchronized scrambler. A mobile subscription to a wireless communication network, characterized in that a scrambler selects a time slot to be used by T from among the time slots of a functional channel, and distributes subscriber T uniformly to all the time slots. Digital information transmission method for people. 8 A wireless communication network is equipped with multiple wireless concentration stations, the wireless concentration stations are arranged in a cell-like manner, the wireless concentration station areas overlap, and most co-channel interference occurs within the wireless concentration station area, including border areas. In a digital information transmission system for mobile subscribers of a wireless communication network, in which the frequency allocation of wireless concentrators is determined, the exchange of information related to the functions of the wireless communication network is Functional channels OKi are used between wireless concentrators Fi in individual wireless concentrator areas 1 to 7 that operate according to clock synchronization, and functional channels O are transmitted from wireless concentrators Fi to subscribers T.
Ki periodically sends an information block containing the identification information of the wireless concentrator areas 1 to 7 and information related to the communication load state of the wireless concentrator Fi, and further transmits the information block to the wireless communication network of the wireless concentrator areas 1 to 7. time-division multiplexing and subsequently sending out other information related to the functionality of the information block, such that the active subscriber T receives the functionality channel and obtains information from the functionality channel. , taking into account the information related to the communication load state of the wireless concentrator, and determining which wireless concentrator area 1 to 7 it should belong to and the wireless concentrator area 1 to which it belongs based on the wireless technology situation in which it is located. .about.7 when to make the change, then the subscriber T contacts the radio concentrator Fi via the functional channel OKi,
The above judgment is carried out, and furthermore, the subscriber T who is busy
The communication of the subscriber T is interrupted for a period of time specified in the information block of the functional channel, and it is confirmed whether the subscriber T can maintain the communication connection using the working channel that is currently being used for communication, and the communication with other wireless concentrators is suspended. Wireless communication characterized in that it alternately receives the functional channels of and obtains information therefrom, thereby making it possible to judge when to change the radio concentration areas 1 to 7 to which it belongs. Digital information transmission method for mobile subscribers of the network. 9 Signals M_T, M between subscriber T and wireless concentrator Fi
By exchanging _F, it is periodically determined whether or not the communication connection can be maintained using the current working channel for communication, and if the signals M_T and M_F are disconnected for multiple test cycles, the connection is 9. A digital information transmission system for a mobile subscriber of a wireless communication network according to claim 8, wherein the digital information transmission method is forcibly canceled. 10 Periodic interruptions in communication when receiving functional channels of other wireless concentrators and obtaining information from the functional channels can be eliminated by increasing the transmission speed in the wireless section, and temporary storage devices for communication signals to be transmitted can be eliminated. 9. A digital information transmission system for mobile subscribers of a wireless communication network according to claim 8, wherein the digital information transmission system is provided at both the transmitting and receiving sides of the subscriber T and the wireless concentrator Fi. 11. The busy subscriber T receives and reads the channel information of other radio concentrators as deemed appropriate in terms of radio technology by receiving the functional channels of other radio concentrators and obtaining information from the functional channels; Then, the subscriber T applies to the radio concentrator, designates a vacant working channel deemed appropriate at the time, and the radio concentrator responds to the application by sending a signal to keep the subscriber T on standby;
In a standby state, subscriber T maintains the connection via the conventional wireless concentrator, and prepares for switching the connection by making contact between the conventional wireless concentrator and the switched wireless concentrator. Then, the wireless concentrator after switching notifies subscriber T of the switching time, and at the notified switching time, subscriber T and the wireless concentrator after switching simultaneously execute the switching, and subscriber T who is busy 9. A digital information transmission system for mobile subscribers of a wireless communication network according to claim 8, wherein the mobile subscriber of a wireless communication network can change the wireless concentration area to which the subscriber belongs. 12 Repeatedly notify the subscriber T of the switching time of the wireless concentrator so that the subscriber can confirm the remaining time until the switching time, and repeat the notifications C_3, C_2,
A mobile subscriber of a wireless communication network according to claim 11, wherein the subscriber T is able to perform the switching at a predetermined time if the subscriber T receives at least one notification of C_1. A digital information transmission method for