JPH07303280A - Mobile radio communication system of group subscription - Google Patents

Abstract

PURPOSE:To equalize the utilization of a radio channel by controlling the traffic of a group of mobile sets which belong to the same subscriber. CONSTITUTION:This mobile radio communication system composing the radio channel 3 of a communication channel 3A and a control channel 3B prescribes the mobile sets belonging to the same subscriber 2 to be the mobile sets of group subscription 2G and a mobile communication exchange 1 is provided with a scription identification means 11 identifying the mobile set of group subscription, a communication state monitoring means 12 monitoring and storing the communication situation of the mobile sets of group subscription 2G, a communication limit prescribing means 13 prescribing the limiting number of simultaneous communication for each group, and a connection control means 14 confirming whether a pertient mobile set is among the mobile sets of group subscription or not at the time of receiving the request of connecting the origination and the transmission of the mobile set and, at the time of the mobile set of group subscription, assigns the communication channel when the number of the communicating mobile sets of group subscription within the same group is less than the limiting number of simultaneous communication and can not conduct connection when the number is not less than the limit number of simultaneous communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system. In recent years, mobile communications such as car phones and mobile phones are rapidly becoming widespread. However, shortage of wireless channels has always been a problem because the electric waves that can be used for mobile communications are limited.

On the other hand, since all current mobile stations are in the form of single subscription, if a large number of mobile stations belonging to a specific company frequently communicate with each other, in an extreme case, the mobile station of the company may be used. A situation may occur in which most of the wireless channels of the wireless zone in question are occupied. However, the conventional mobile communication service does not regulate the traffic even if such a situation occurs.

For this reason, companies that use mobile communication frequently
There is a need for a mobile communication service that can keep the total traffic volume of mobile devices owned by the same subscriber within a certain range.

[0004]

2. Description of the Related Art FIG. 7 is an explanatory diagram of a radio channel configuration in a mobile communication network, and FIG. 8 is an explanatory diagram of a subscriber line configuration in a fixed communication network. First, the relationship between a wireless channel and a mobile device in a conventional mobile communication network will be described with reference to FIG.

In FIG. 7, reference numeral 21 is a mobile communication exchange, and 22S, 2
2G is a mobile device, 23 is a wireless channel, 23A and 23B are two types of channels that make up the wireless channel 23, 23A is a plurality of communication channels used for communication, and 23B is commonly used for connection control. It is a control channel. Further, 24 is a wireless base station, 25 is a wireless zone, 26 is a mobile communication network, and 27 is a fixed communication network. The mobile units 22S and 22G are separated from each other for convenience of explanation. 22S is a mobile unit corresponding to a single subscriber in a fixed communication network (hereinafter referred to as a single mobile unit), and 22G is a mobile unit belonging to the same subscriber. (Hereinafter, it is referred to as a group mobile unit). However, when the individual mobile units 22S and the group mobile units 22G are collectively referred to, they are referred to as mobile units 22.

In FIG. 7, when the mobile station 22 makes a call for communication, the call information is sent to the mobile telecommunication switch 21 via the radio base station 24 via the control channel 23B. When the mobile communication switchboard 21 receives this calling information, the mobile switchboard 22
The communication channel 23A is assigned to and the connection processing is performed for the connection partner specified by the calling information. that time,
If the communication channel 23A is fully busy, the busy information is sent to the mobile unit 22 that has called via the control channel 23B,
Notify that the connection cannot be established. If the communication channel 23A can be captured, the connection is made to the connection partner (may be a subscriber of the fixed communication network 27 or a subscriber of the mobile communication network 26), but is busy or relayed by the connection partner. Similarly, if the line is encountered during line talk, information indicating that the line is busy is transmitted via the control channel 23B.

Next, a case where the mobile device 22 receives an incoming call will be described. For example, from a subscriber of the fixed communication network 27, a mobile communication switch 21
When there is an incoming call to the mobile switching center 22,
After selecting 23A, the called mobile device 22 is called via the control channel 23B, and when the called mobile device 22 responds, a call is made via the selected communication channel 23A. However, if the communication channel 23A is busy, the busy tone is sent to the caller of the fixed communication network 27.

As described above, the communication channel 23 is set by the mobile communication exchange 21 in both cases of originating a mobile station and receiving a mobile station.
Although A is assigned, in the mobile communication service according to the conventional technology, all the mobile units 22 are treated as individual subscribers and there is no regulation to call the group mobile unit 22G. Therefore, regarding the assignment of the communication channel 23A, the single mobile unit 22S and the group mobile unit 22G are assigned. There is no difference between aircraft 22G.

Therefore, if a large number of group mobile stations 22G belonging to a particular company frequently communicate, most of the communication channels 23A of the wireless zone 25 are occupied by the group mobile station 22G of the company. May occur. However, in the conventional technology, even if such a situation occurs, there is no means for controlling traffic, so that other mobile
It is inevitable that the 22S communication will be affected.

Next, the structure of the subscriber line of the fixed communication network of FIG. 8 will be described in order to compare with the structure of the wireless channel of the mobile communication of FIG. Although (1) of FIG. 8 illustrates a general configuration in which a subscriber terminal or a private branch exchange is directly accommodated in the subscriber exchange, a typical example of subscribers accommodated in the subscriber exchange 31 is shown. , Single telephone 32S, co-subscriber telephone 32P and private branch exchange (PBX) 35.

A single telephone 32S in which one telephone is connected to one subscriber line 33 always monopolizes the subscriber line 33 regardless of whether or not a telephone call is made.
In this system, the subscriber line 33 of the book is shared by two subscribers, and the two parties of the joint subscriber telephone 32P, Party B and Party B, belong to different subscribers, have different telephone numbers, and are called individually. Since the co-subscribed telephone 32P shares one subscriber line, the other telephone cannot communicate while one telephone is in use. Does not affect the subscribers of.

32G is an extension telephone housed in a private branch exchange (PBX) 35. The private branch exchange 35 is accommodated in the subscriber exchange 31 by a much smaller number of subscriber lines than the total number of the extension telephones 32E (hereinafter, the subscriber line connected to the private branch exchange 35 will be referred to as a central line) 34. When making a call to the outside from the extension telephone 32E, the private branch exchange 35 selects the vacant station line 34 to connect, but when the number of connection requests to the outside increases, the station line 34 becomes full busy. The private branch exchange 35 sends a busy tone or the like to the calling extension telephone 32E to notify that the connection cannot be established. However, multiple extension phones
No matter how much traffic is generated from 32E, it does not affect the subscriber line 33 other than the preset office line 34.

Next, (2) in FIG. 8 will be described. Of FIG.
(2) shows a concentrating system configuration in which subscribers are accommodated in the subscriber exchange through the concentrator. In this system, since there are subscribers who are grouped in an area far from the subscriber exchange station 40 in which the subscriber exchange 41 is installed,
A local exchange station (hereinafter referred to as a slave station) 49 is installed, and concentrators 46 and 47 are provided at a subscriber exchange station (hereinafter referred to as a master station) 40 and a slave station 49, respectively, and both concentrators 46 and 47 are connected by a trunk line 48. is doing. Trunk line
The number of 48 lines is determined by the traffic, but of course the slave station 49
Much less than the total number of subscriber lines 43,44.

In the concentrator 47 of the slave station 49, as in the subscriber exchange shown in FIG. 8 (1), a single telephone 42S and a joint telephone 42P.
And a private branch exchange (PBX) 45 is housed, and a private branch exchange 45
The extension telephone 42E is housed in the.

The configuration of (2) in FIG. 8 is different from the configuration of (1) in that the subscriber lines 43 and 44 are not directly accommodated in the subscriber exchange 41 but are concentrated and connected by a concentrator 47. is there. For this reason, even the single telephone 42S is affected by the traffic of other subscribers, and if the traffic increases, it may not be possible to connect to the subscriber exchange 41. However, in the configuration shown in the figure, the private branch exchange 45 is connected to the concentrator 47 by the subscriber line (hereinafter, the subscriber line connected to the private branch exchange 45 is referred to as the office line) 44. Even if there are many calls, traffic will be limited by the number of central lines 44, and the influence on other subscribers will be reduced.

The structure of the radio channel of the mobile communication network shown in FIG. 7 is compared with the structure of the subscriber line of the fixed communication network shown in FIG.
In the configuration shown in FIG. 7, all the mobile units 22 can be considered to have the same character as a single telephone in a fixed communication network, but since the empty communication channel 23 is captured each time a call is made or received, the exchange and the telephone are always connected. Directly connected Fig. 8 (1)
Clearly different from the general configuration of. On the other hand, the line concentrating structure in FIG. 8 (2) is a system similar to the wireless channel in FIG. 7 because it is a system that captures an empty trunk line 48 each time a call is made or received.

Comparing the constituent parts of FIG. 7 with the constituent parts of (2) of FIG. 8, the mobile communication switch 21 corresponds to the subscriber switch 41, the radio channel 23 corresponds to the trunk line 48, and the mobile device 22 corresponds to the single telephone 42S. It will be done. However, since the mobile units 22S and 22G shown in FIG. 7 are directly connected to the communication channel 23A corresponding to the trunk line 48 shown in FIG.
S is a subscriber exchange without using the subscriber line 43 and the concentrator 47.
By the control of 41, it is directly connected to the trunk line 48, which corresponds to a form.

In contrast to the above, the mobile unit shown in FIG.
Since 22G is a terminal belonging to the same subscriber (company etc.), it has the character of the extension telephone 42E of FIG. 8 (2).
Since there is no equivalent to the private branch exchange 45 in the mobile communication network 25, the single telephone 42S is entirely accommodated in the concentrator 47. Therefore, when a large amount of traffic is generated from the mobile device 22G, the communication channel corresponding to the trunk line 48 in FIG.
Most of the 23A is occupied by the mobile unit 22G.

[0019]

In the conventional mobile communication service, since all the mobile devices are in a single subscription mode,
When the traffic from a plurality of mobile devices belonging to the same subscriber increases, the communication channel is occupied thereby, which affects the communication of other mobile devices. In other words, the conventional mobile communication service limits the number of wireless channels that can be used by a subscriber having a plurality of terminals, unlike the subscriber line (station line) of a private branch exchange or a co-subscribed telephone in a fixed communication network. There is a problem that you can not.

An object of the present invention is to equalize the use of radio channels by controlling the traffic of mobile station groups belonging to the same subscriber.

[0021]

FIG. 1 is a basic configuration diagram of the present invention. In the figure, 2 is a plurality of mobile devices, 4 is a radio base station,
Reference numeral 3 is a radio channel set between the radio base station 4 and the plurality of mobile devices 2, 3A and 3B constitute a radio channel 3, 3A is a plurality of communication channels for transmitting communication information, and 3B is a plurality of mobile devices 2 Is a control channel for transmitting control information of 1 in common, and 1 is a mobile telecommunication exchange that controls connection of a plurality of mobile units 2 via a radio base station 4 and a radio channel 3.

In the present invention, a plurality of mobile stations 2 belonging to the same subscriber are grouped among a plurality of mobile stations 2 and each of them is defined as a group subscription mobile station 2G. Provide means.

Reference numeral 11 is a group subscription identifying means for identifying whether each of the plurality of mobile stations 2 is a group subscription mobile station 2G, and 12 is a communication state monitoring means for monitoring and storing the usage status of the group subscription mobile station 2G. , 13 are communication limit defining means for defining, for each group, the number of communication channels 3A that can be simultaneously used by the group subscribing mobile devices 2G in the group as the simultaneous communication limit number.

Further, 14 receives the call request from the mobile unit 2 via the control channel 3B, or receives the connection request to the mobile unit 2 from the fixed communication network via the group identification means 11. It is confirmed whether the calling mobile device 2 or the receiving mobile device 2 is a group subscribing mobile device 2G, and if it is a group subscribing mobile device 2G, a group subscribing mobile device in communication within the same group. When the number of 2G is confirmed by the communication status monitoring means 12 and compared with the simultaneous communication limit defined by the communication limit defining means 13, when the number of group subscribing mobile stations 2G in communication is less than the simultaneous communication limit Is mobile 2
Communication channel 3A is allocated to, and if the number of group subscribing mobile stations 2G in communication exceeds the simultaneous communication limit number, information indicating that connection to the calling mobile station 2 or the fixed communication network is impossible is displayed. It is a connection control means for sending out.

[0025]

In FIG. 1, when any mobile station 2 (including the group-subscribing mobile station 2G) makes a call, the call information is the control channel.
It is sent to the connection control means 14 of the mobile communication exchange 1 via 3B. Upon receiving the calling information, the connection control means 14 accesses the group identification means 11 and confirms whether or not the calling mobile unit 2 is the group joining mobile unit 2G, and the group joining mobile unit.
If it is not 2G, normal connection processing is performed.

The calling mobile unit 2 is a group joining mobile unit 2G
(In this case, the calling mobile unit 2 is referred to as a group joining mobile unit 2G), the communication group monitoring unit 12 is accessed and the calling group joining mobile unit 2G confirmed by the group identifying unit 11 belongs. Check the number of group subscribing mobile devices 2G that are communicating in the group.

Next, the connection control means 14 is a communication limit defining means.
13 is accessed and compared with the maximum number of simultaneous communication of the group specified in advance, and if the number of group mobile units 2G in communication is less than the maximum number of simultaneous communication, the group mobile unit 2G that made the call is sent. Then, the communication channel 3A is allocated to the connection processing. When the number of group subscribing mobile stations 2G in communication is equal to or greater than the simultaneous communication limit number, information indicating that connection cannot be established is sent to the group subscribing mobile station 2G that has called through the control channel 3B.

When there is a connection request from the fixed communication network side to the mobile unit 2, the connection control unit 14 determines whether the mobile unit 2 of the called party is the group joining mobile unit 2G via the group identification unit 11. After confirming that, the same processing as described above is performed. That is, when the mobile device 2 of the called party is the group-subscribed mobile device 2G and the number of the group-subscribed mobile devices 2G in communication in the group is less than the simultaneous communication limit number, the called party's group-subscribed mobile device. Communication channel for 2G
3A is allocated and connection processing is performed, and when the number of group subscribing mobile stations 2G in communication is equal to or greater than the simultaneous communication limit number, information indicating that connection cannot be made is sent to the fixed communication network side.

As described above, in FIG. 1, a plurality of group subscribing mobile stations 2G belonging to the same subscriber cannot simultaneously perform communication beyond a predetermined simultaneous communication limit. That is, in FIG. 1, traffic is limited in the same way as the maximum number of simultaneous communications is the same as the number of office lines in a private branch exchange of a fixed communication network, so that mobile stations in the same group may occupy more than the maximum number of simultaneous communication channels. It will be gone. For this reason, even if the traffic from a plurality of mobile devices belonging to the same subscriber increases, the communication of other mobile devices is not significantly affected.

[0030]

FIG. 2 is a block diagram of a mobile communication exchange according to an embodiment of the present invention, FIG. 3 is an explanatory view of a group joining identification means according to the embodiment of the present invention, and FIG. 4 is a communication limit definition table according to the embodiment of the present invention. FIG. 5 is a flow chart of a mobile device originating connection according to an embodiment of the present invention, and FIG. 6 is a flow chart of a mobile device incoming connection according to an embodiment of the present invention.

Throughout the drawings, the same reference numerals denote the same objects, 10 is a control device for controlling the mobile telecommunication switch, 11 to 15
Is provided in the control device 11, 11 is a group joining identification table (implementation form of the group identification means 11 of FIG. 1), 12 is a line memory (implementation form of the communication state monitoring means 12 of FIG. 1),
13 is a communication limit definition table (communication limit definition means 13 in FIG.
Is a connection control unit, and 15 is a subscriber data file.

Reference numeral 16 is a speech path switch, 17 is a trunk (TRK) connected to a fixed communication network (not shown), and 18 is connected to the radio base station 4 (see FIG. 1) via a communication line 19A. Mobile trunk (TRK-M), 19A is a communication line connected to the communication channel 3A (see FIG. 1) via the radio base station 4, and 19B is a control channel 3B via the radio base station 4.
It is a control line connected to (see FIG. 1).

FIG. 2 shows a detailed structure of the mobile communication exchange 1 of FIG. Although the external configuration of the mobile communication exchange 1 is not shown in FIG. 2, the external configuration is the same as that of FIG. 1, and therefore each external configuration part will be described using the reference numerals of FIG. In the mobile communication network, a radio control station is generally installed between the mobile communication exchange 1 and the radio base station 4, but the operation of the radio control station is not directly related to the present invention. The description is omitted.

First, an embodiment of the operation of mobile unit transmission will be described mainly with reference to FIGS. In addition, S1 to S12 in the following
Is a code for identifying each step in FIG. When any mobile device 2 including the group mobile device 2G makes a call (the subscriber number of the calling mobile device is A, and the calling mobile device 2 is hereinafter referred to as mobile device A) (S1), the call is made. Information control channel
It is transmitted to the radio base station 4 via 3A, and sent from the radio base station 4 to the control device 10 of the mobile communication exchange 1 via the control line 19B. In the mobile telecommunication exchange 1, the connection control unit 14 receives this calling information, but the connection control unit 14 accesses the group joining identification table 11 to determine whether the calling mobile unit A is the group joining mobile unit 2G. Is confirmed (S2, S3).

Now, referring to FIG. 3, the group joining mobile unit 2G
The identification method of will be described. In the present invention, a group is composed of a plurality of mobile stations 2 belonging to the same subscriber. The grouped mobile stations 2 are registered in the subscriber data of the subscriber data file 15 as being a group subscription mobile station 2G. Keep it. 3 (1) shows an example of the subscriber data stored in the subscriber data file 15 of FIG.
Among the plurality of mobile units 2 in FIG. 1, mobile units A, J, P belonging to the same group (group name is G1)
Subscriber data is shown.

In the subscriber data file 15 of FIG. 3 (1), the subscriber data of the mobile station A from the address a is stored. Of these, the subscriber data that has been conventionally used is stored in the portion described as subscriber A information, but in the present invention, the portion described as group identification information is added to this.

The group identification information includes a group number, a representative mobile station address, and a next mobile station address. In the figure, the mobile station A belongs to the group number G1 and the representative mobile station is included in these items. Is the mobile station stored at address a, that is, mobile station A itself, and the next mobile station belonging to the same group G1 is stored at address j.

As shown in the figure, the subscriber data of the mobile station J is stored at the address j stored in the next mobile station address. The mobile station J moves the mobile station A as a representative by the group identification information. It is shown that the next mobile station belonging to the group G1 which is a machine is stored at the address p. Similarly, the subscriber information of the mobile station P is obtained, but the next mobile station address of the mobile station P stores END indicating the last mobile station instead of the address. This makes it clear that the mobile devices A, J, and P are included in the same group G1.

The subscriber data file 15 shown in FIG. 2 is a general file provided in the exchange, but as described above, by configuring as shown in FIG.
In addition to identifying whether or not is a group joining mobile device 2G,
Since it can be used to confirm the group subscribing mobile devices 2G belonging to the same group and the group number to which each group subscribing mobile device 2G belongs, the subscriber data file 15 itself also serves as the embodiment of the group identifying means 11 of FIG. You can also let it.

On the other hand, (2) in FIG. 3 is a subscriber data file
A table in which the information extracted from 15 is collectively stored in units of groups, which is another embodiment of the group joining identification means 11. FIG. 3 (2) shows that at least three group-subscribing mobile stations 2G having subscriber numbers A, J and P belong to the group G1.

The mobile station A that originated the call is a group-subscribed mobile station 2G
In order to confirm whether or not it is, the mobile station is accessed by accessing the address a of the subscriber data file 15 of (1) of FIG. 3 using the subscriber number A as an index and reading the group identification information of the subscriber data. A is a group-subscribed mobile device
It can be confirmed whether or not it is 2G, but when the group subscription identification table 11 of FIG. 3 (2) is provided, the group subscription identification table 11 can be directly searched and confirmed.

As will be described later, when the calling mobile station A is the group subscribing mobile station 2G, the group subscribing mobile station 2G belonging to the same group is extracted in order to confirm the communication status of the mobile stations of the same group. This is necessary, but this extraction uses the subscriber data file 15 of (1) in FIG. 3, and if mobile unit A is found to be a group subscribing mobile unit, for example, by tracking the chain, mobile unit J and mobile unit It can be confirmed that P is included in the same group. If the calling mobile station is not the mobile station A of the representative mobile station but the mobile station J, the mobile station A is confirmed from the representative mobile station address of the subscriber data of the mobile station J. You can check other mobile stations that join the group at.

However, in the case where the group joining identification table 11 is provided and the group joining mobile stations belonging to the same group are extracted, whether or not the calling mobile station is the group joining mobile station is determined by the subscriber data file 15. When confirming that, the group number is confirmed at the same time, and the group joining identification table 11 is accessed by using the group number as a key, whereby the group joining mobile unit of the same group can be found quickly. It is possible to store the address information of the group subscription identification table 11 in the group identification information of the subscriber data file 15 as shown in FIG.
The description is omitted in (1).

As a result of checking whether or not the mobile device A is the group-subscribing mobile device 2G as described above (S3), if it is confirmed that the mobile device A is not the group-subscribing mobile device 2G, the connection control unit 14 will Call processing, for example, idle communication channel 3A
The communication line 19A corresponding to is selected and assigned to the mobile device A to execute the connection process (S3 → S12).

If the mobile unit A is the group-subscribed mobile unit 2G, the group number (G1) to which the mobile unit A belongs.
Then, the subscriber numbers of all the mobile stations 2G belonging to the group G1 are confirmed (S4). This confirmation can be performed using either the subscriber data file 15 or the group subscription identification table 11 as described above, but FIG. 5 shows an example using the group subscription identification table 11.

When confirming the subscriber numbers of all the group mobile stations 2G included in the same group G1 as the mobile station A, the connection control unit 14 accesses the line memory 12 to access the mobile stations J and P.
The communication state of the group subscribing mobile device 2G in the same group G1 including the above is confirmed (S5). The line memory 12 stores whether or not the subscriber is in a call state, and is widely used in exchanges, but here also monitors and stores the communication state of the group subscribing mobile unit 2G. So
The communication state monitoring table 12 shown in FIG. 1 is realized (detailed description thereof is omitted because it is a known technique).

In this example, since the mobile unit A in the group G1 has not started communication yet, the line memory 12 confirms the communication state with the two mobile units J and P. Is communicating, the number n of mobile units in communication is 1.

After confirming the number of mobile units in communication, the connection control unit 14 checks whether or not it is necessary to confirm the use states of all communication channels 3A (S6). When it is necessary to confirm the usage statuses of all the communication channels 3A, which is the case where claim 2 is applied (described later), this is not necessary here, and the process proceeds to step S9. Simultaneous communication limit number of groups G1 connection controller 14 accesses the communication limit defines the table 13 in S9 N _i
Is confirmed and compared with the number n of mobile units in communication (S9, S1
0).

The contents of the communication limit definition table 13 in this case are shown in (1) of FIG. As shown in the figure, the simultaneous communication limit number of the group G1 defined in the communication limit definition table 13 is N.
_{Assuming that i} = 2, the number of mobile units in communication is n = 1.
Then, since the number of mobile units n in communication is less than the simultaneous communication limit number (n <N _i ), the connection control unit 14 executes the calling process as in the conventional case (S10 → S12).

However, when N _i = 1 is defined, n = N _i , and the number of mobile units in communication exceeds the simultaneous communication limit number. Therefore, the connection control unit 14 cannot connect to the control line 19B. The information to be notified is sent (S10 → S11). This information is received by mobile station A via control channel 3B
It is converted into an audible sound or visible information in the inside and is notified to the user (processing in the mobile unit can be realized by a known technique, so description will be omitted).

Next, the operation for confirming the usage statuses of all communication channels 3A will be described. This operation is performed when claim 2 is applied as described above. Figure 5
When it is confirmed in step S6 that it is necessary to confirm the use states of the communication channels, the connection control unit 14 confirms the use states of all the communication channels 3A (S7). Specifically, this confirmation is performed by confirming the number of simultaneous operations or the number of vacant units of the trunk 18 for the mobile unit or the communication line 19A. A dedicated table may be provided for this confirmation, but in order to simplify the explanation here, the total number of mobile units in communication (corresponding to the number of communication lines 19A in use) is counted using the line memory 12. Then, the number of free communication lines is calculated by subtracting from the number of equipment of the communication lines 19A stored in advance, and the number is defined as the number of free communication channels (denoted as T).

Here, if the number T of available communication channels is equal to or more than the number T _M defined in advance, that is, if the line has a margin, the connection is not restricted. In this case, the conventional call processing is unconditionally performed, the communication channel 3A is selected, and the connection processing is executed (S8 → S12). If the number T of available communication channels is less than T _M , the connection control unit 14 accesses the communication limit regulation table 13 and confirms the simultaneous communication limit number N _i of the communication channels of group 1 (S8 → S9).
(2) in Fig. 4 is the communication limit specification table used in this case.
13 examples are shown.

4 (2) shows an example of the simultaneous communication limit number N _i for each group, the number T of empty communication channels in FIG. 4 (2) is a number smaller than the above number T _M. Is set. As shown in the figure, for example, the simultaneous communication limit number N _i of the group G3 is N _i = 1 when the number T of empty communication channels is T ≦ 4, and N _i = 2, T ≧ when T = 5 to 7 If the number is 8, the number of simultaneous communication limit number N _i is set larger as N _i = 3 and the number T of available communication channels increases.

Further, in the case of the group G5 of FIG. 4, an example is shown in which the simultaneous communication limit number N _i is always 1 except when there is no free communication channel number T, that is, when T = 0. This is because the same subscriber has multiple mobile stations,
This means that the communication channel always uses only one line, and the mobile device corresponds to a co-subscribed telephone set (two groups or many groups) of a fixed communication network.

From the above, according to the communication limit definition table 13, the simultaneous communication limit number N of the group G1 to which the calling mobile station A belongs is
_{When i} is confirmed (S9), the connection control unit 14 compares it with the number n of the group-subscribing mobile stations 2G in communication of the group G1 confirmed previously (S10), and the number n of the group-subscribing mobile stations 2G in communication is n.
Is less than the simultaneous communication limit number N _i , that is, if n <N _i , a calling process is performed. Specifically, the idle communication line 19A corresponding to the idle communication channel 3A is allocated to the mobile device A and the connection process is performed (S10). → S12). However, the group mobile unit that is in communication
If the number of 2G n is greater than or equal to the simultaneous communication limit number N _i , the control line
Sends information to 19B indicating that connection is impossible. This information is sent to the calling mobile station A via the radio base station 4 and the control channel 3B and converted into audible sound or visible information in the mobile station A to notify the user that the connection is impossible.

Next, an example of the operation of the incoming call from the mobile station will be described mainly with reference to FIGS. 2 and 6, but the description of the same parts as those originating from the mobile station will be omitted. It should be noted that S21 to S32 in the following are codes for identifying each step in FIG.

From the fixed communication network, the mobile unit 2 or the group-subscribing mobile unit 2G (the subscriber number of the mobile unit of the connection partner is A,
Hereinafter, it is assumed that a call requesting a connection to mobile unit A has arrived at mobile telecommunication exchange 1 (S21). The connection control unit 14 of the mobile communication exchange 1 confirms whether or not the mobile device A is the group-subscribed mobile device 2G (S22), but thereafter, S23.
-S30 and S32 are the same as S2-S10 and S12 of FIG. 5, respectively.

[0058] Stiff S30 result of comparing the number n and the group G1 concurrent communication limit speed N _i of the group subscriber mobile 2G in communication with the group G1 in which belongs incoming call destination mobile device A in, if n <N _i The connection control unit 14 executes a calling process (S30 → S32), and if n ≧ N _i , the connection control unit 14 sends, for example, a talkie announcement or a busy tone to the fixed communication network side to caller. Notify that connection is not possible (S30 → S3
1).

As described above, according to the present invention, a plurality of group subscribing mobile stations 2G belonging to the same subscriber cannot simultaneously perform communication beyond a predetermined maximum number of simultaneous communication. That is, since the traffic limit is the same as the number of office lines in the private branch exchange of the fixed communication network or the common subscriber line of the joint subscriber telephone, the traffic of a plurality of mobile devices belonging to the same subscriber is limited. Even if it increases, it does not have a great influence on the communication of other mobile devices.

The embodiment of the present invention has been described above with reference to FIGS. 2 to 6. However, FIGS. 2 to 6 merely show a part of the embodiment of the present invention, and the embodiment of the present invention is shown. It goes without saying that it is not limited to. For example, since there are various types of exchanges, the mobile communication exchange may have various configurations other than the configuration shown in FIG. Further, the effects of the present invention will not change even if the contents and numerical values of the subscriber data file, the group identification table, the communication limit definition table, etc. shown in FIGS. 3 and 4 are not shown.

Further, in FIG. 5 and FIG. 6, when there is a margin in the communication channel, regardless of the definition of the maximum number of simultaneous communication,
It is supposed that the incoming and outgoing call processing is performed, but the effect of the present invention does not change even if this function is excluded.

[0062]

As described above, according to the present invention, a plurality of mobile stations belonging to the same subscriber are grouped, and the maximum number of simultaneous communication is defined for each group, so that the group subscribing mobile stations belonging to the same group can be provided. It is possible to prevent more than the simultaneous communication limit number of simultaneous communication. Therefore, even if a plurality of mobile devices belonging to a company or the like frequently perform mobile communication, the communication of other mobile subscribers is not significantly affected, and the use of radio channels can be equalized. Further, since the traffic of a plurality of mobile devices belonging to the same subscriber is suppressed to a certain limit, the traffic fluctuation of the wireless channel becomes small. Therefore, the traffic design of the radio channel is facilitated and the use efficiency of the radio channel is improved.

Further, to define the maximum number of simultaneous communication for each group is to set the limit of the number of simultaneous communication in the private branch exchange of the fixed communication network
Or, as with the subscriber line of the co-subscribed telephone set, the number of subscriber lines used by the subscriber is limited, so it is similar to introducing a private branch exchange or co-subscriber form of a fixed communication network to the mobile communication network. Can be obtained. Specifically, in mobile communication services, the value of the maximum number of simultaneous communications for the same subscriber group is set so that subscribers who install private branch exchanges in fixed-line networks will have different line charges depending on the number of office lines. It may be reflected in the usage fee of. For example, a group subscription fee that is cheaper than a single-subscribed mobile device in return for restricting the number of mobile devices that an operator providing mobile communication services can use for communication with multiple mobile devices at the same time. By applying, it can be expected to reduce communication costs for large users of mobile communication such as companies.

As described above, the present invention greatly contributes to the efficiency and the equalization of utilization of wireless channels for which shortage is sought, and the effect of the present invention is reflected in the usage fee of the mobile communication service to subscribe. There is a great possibility that it will also contribute to the reduction of communication costs for users.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a block diagram of a mobile communication exchange according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a group joining identification means according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a communication limit definition table according to the embodiment of this invention.

FIG. 5 is a flow chart of a mobile device originating connection according to an embodiment of the present invention.

FIG. 6 is a mobile terminal incoming connection flow chart according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a wireless channel configuration in a mobile communication network.

FIG. 8 is an explanatory diagram of a subscriber line configuration of a fixed communication network.

[Explanation of symbols]

 1 Mobile Communication Switch 2 Mobile Device 2G Group Join Mobile Device 3 Radio Channel 3A Communication Channel 3B Control Channel 4 Radio Base Station 11 Group Identification Means 12 Communication Status Monitoring Means 13 Communication Limit Defining Means 14 Connection Control Means

 ─────────────────────────────────────────────────── --Continued front page (72) Inventor Hiroshi Sawada 2-10-1 Toranomon, Minato-ku, Tokyo NTT Mobile Communication Network Co., Ltd.

Claims (2)

[Claims] 1. A mobile communication exchange (1) controls connection between a plurality of mobile devices (2) via a wireless base station (4) and a wireless channel (3), and the wireless channel (3) A plurality of communication channels (3A) for transmitting communication information and the plurality of mobile devices
In a mobile communication system configured with a control channel (3B) that transmits the control information of (2) in common, a plurality of mobile devices (2) belonging to the same subscriber among the plurality of mobile devices (2) are Grouping and defining each as a group joining mobile unit (2G), the mobile communication exchange (1)
A group subscription identifying means (11) capable of identifying whether each of the plurality of mobile stations (2) is the group subscription mobile station (2G), and the usage status of the group subscription mobile station (2G) A communication state monitoring means (12) for monitoring and storing information, and a group-subscribing mobile device within each group for each group.
(2G) communication limit defining means (13) that defines the number of communication channels (3A) that can be used simultaneously as the simultaneous communication limit number, and a call request from the mobile unit (2) via the control channel (3B). When receiving a request for connection to the mobile device (2) from the fixed communication network, the calling mobile device (2) or the destination mobile device via the group identification means (11).
Check whether (2) is a group joining mobile device (2G),
If it is a group subscribing mobile device (2G), the number of communicating group subscribing mobile devices (2G) in the same group is confirmed by the communication status monitoring means (12), and the communication limit defining means (1
If the number of group subscribing mobile units (2G) in communication is less than the simultaneous communication limit number compared with the simultaneous communication limit specified in 3), the communication channel ( 2A) is assigned, and if the number of group subscribing mobile stations (2G) in communication is equal to or more than the simultaneous communication limit number, the calling mobile station (2)
Alternatively, a group subscribing mobile communication system is provided with a connection control means (14) for transmitting information indicating that the connection to the fixed communication network is impossible. 2. The communication limit defining means (13) changes and specifies the simultaneous communication limit number of each group according to the usage state of the entire communication channel (3A). Group mobile communication system.