JPH07184250A - Mobile terminal equipment calling system - Google Patents

Abstract

PURPOSE:To provide the mobile terminal equipment calling system in which the load of an in-zone exchange is relieved. CONSTITUTION:In the mobile terminal equipment calling system comprising a gate exchange station 2 connecting to a general telephone network 1, an in-zone exchange station 3 connecting to the gate exchange station 2, a radio base station 6 connecting to the in-zone exchange station 3, and plural mobile terminal equipments 7 making radio communication with the radio base station 6, a zone.time memory 10 to which a radio zone with a called mobile terminal equipment 7 resident therein and date information are registered for the case when a communication path setting is disable is provided to each mobile terminal equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal calling system.

[0002]

2. Description of the Related Art FIG. 4 is a conceptual diagram showing the configuration of a conventional system of a mobile communication network. Solid lines are signal lines, broken lines are control lines, and double lines are memory access lines (the same applies hereinafter). In the figure, 1
Is a general telephone network, 2 is a gateway exchange station connected to the general telephone network 1, and 3 is a serving exchange station connected to the gateway exchange station 2. At least one of the in-zone switching stations 3 is connected to the gateway switching station 2. 4 is these gateway exchange 2 and in-area exchange 3
The location registration memory 5 having the location information of the mobile terminal connected thereto is a subscriber information memory having the subscriber information of the mobile terminal, which is also connected to the gateway exchange station 2 and the visited exchange station 3.

FIG. 5 is a diagram showing a configuration example of the position registration memory 4. 4a is a mobile terminal ID, 4b is a dial number, 4
c is position information. The location information 4c stores the number of the serving exchange station 3 in which the mobile terminal exists.

FIG. 6 is a diagram showing a configuration example of the subscriber information memory 5. 5a is a mobile terminal ID and 5b is corresponding subscriber information. As the subscriber information, a code as shown in the figure is used. For example, when a call is sent from a mobile terminal, a cipher unique to the mobile terminal is sent, and the visited exchange 3 compares the received cipher with the cipher stored in the subscriber information 5b. It is determined that the subscribers are matched with.

In FIG. 4, again, 6 is a radio base station connected to the in-area switching center 3, and 7 is a plurality of mobile terminals that communicate with the radio base station 6 by radio. At least one wireless base station 6 is connected to each in-zone switching station 3. Z1 is an exchange zone composed of two gateway exchanges, and Z2 is an existing exchange 3
A control zone configured in units, Z3 is a wireless zone configured in units of wireless base stations 6. The gateway exchange 2 accommodates at least one visited exchange 3 and controls the exchange zone Z1, and the visited exchange 3 has at least one radio base station 6
The wireless base station 6 accommodates at least one mobile terminal 7 and controls the wireless zone Z3. The control of the operation of the system configured as described above is as follows.

Unlike the fixed network, the mobile terminal 7 moves in the mobile network. Therefore, it is necessary for the network side to always know the position of each mobile terminal 7 in order to set a path with the mobile terminal 7 when the mobile network moves. is there. Therefore, the location registration memory 4 is updated every time the mobile terminal 7 moves to the control zone Z2. now,#
Refer to the figure for the procedure for setting the communication path from the mobile terminal 7 in the first wireless zone Z3 (hereinafter abbreviated as mobile terminal A) to the mobile terminal 7 in the third wireless zone Z3 (hereinafter abbreviated as mobile terminal B) While explaining, it is as follows.

1. When there is a call origination request from the originating mobile terminal A, the serving exchange station 3 of # 1 searches the subscriber information memory 5 to authenticate the originating mobile terminal A. 2. When the authentication is completed, the user dials the number of the mobile terminal B from the mobile terminal A.

3. Based on the received dial number, the location switching center 3 of # 1 refers to the location registration memory 4 and reads out the location registration information. 4. Based on the read position registration information, the located mobile switching center 3 of # 1 recognizes that the corresponding mobile terminal B is under the located local switching center 3 of # 2.

5. In response to the instruction from the visited exchange station 3 of # 1, the visited exchange station 3 of # 2 sends a call instruction to all the radio base stations 6 under its control. 6. All radio base stations 6 under the location of the # 2 exchange station 3
Makes a call to each wireless zone Z3.

7. A response to the call is returned from the mobile terminal B in the wireless zone Z3. 8. The location switching center 3 of # 2 searches the subscriber information memory 5 to authenticate the incoming mobile terminal B.

9. After the authentication is completed, the mobile terminal A on the network side
To the radio base station 6 of # 3 (the radio base station in which the mobile terminal B is located) are set. 10. By radio, a path is set between the mobile terminal B and the radio base station 6 of # 3.

[0012]

In the above-mentioned conventional system, the process of "the serving exchange station 3 of # 2 sends a call instruction to all the radio base stations 6 under its control" in the procedure 5 is as follows. It is a very heavy burden on the system controlling the network. FIG. 7 is a diagram showing a state of the broadcast communication of the in-area switching center 3 at this time. As shown in the figure, the in-zone switching center 3 first transmits information to the radio base station (BS) 1 () and then transmits information to the second BS 2 (). Hereinafter, similar processing is performed up to BSN.

Conventionally, the network side does not recognize when and where the incoming mobile terminal 7 received an incoming call.
Therefore, when a call is repeatedly sent to the same mobile terminal in a short time like redial (when the incoming mobile terminal is hardly moving and it is considered that it is near the wireless zone at the time of the previous call). 2), the processing of the procedure 5 must be always performed, and it is inevitable that the load on the system concentrates at that time. Further, since the communication line is wireless, there are some places where the wireless communication is very difficult to reach, and there is a problem that the procedure 5 is performed even when the line is disconnected during the call and the call must be made again. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mobile terminal calling system capable of reducing the burden on the service area switching center.

[0015]

FIG. 1 is a block diagram showing the principle of the present invention. The same parts as those in FIG. 4 are designated by the same reference numerals. In the figure, 2 is a gateway exchange station connected to the general telephone network 1, 3 is a visited exchange station connected to the gateway exchange station 2, 6 is a radio base station connected to these visited exchange station 3,
Reference numeral 7 denotes a plurality of mobile terminals that wirelessly communicate with these wireless base stations 6. Reference numeral 4 is a location registration memory that stores location registration information, and 5 is a subscriber information memory that stores subscriber information. These components make up the mobile terminal calling system. Reference numeral 10 denotes a zone / time memory for registering the wireless zone in which the incoming mobile terminal 7 is present and the date and time information at that time when the communication path cannot be set or when the communication ends.

[0016]

Function The in-area switching center 3 registers the wireless zone in which the incoming mobile terminal 7 is present and the date and time information at that time when the communication path cannot be set or when the communication is completed. Then, at the time of the next incoming call, the in-zone switching station 3 searches the zone / time memory 10 to directly call the wireless zone of the incoming mobile terminal. As a result, unlike the conventional system, there is no need to perform broadcast communication to all the radio base stations under the service of the in-zone switching station 3, so that the burden of the in-zone switching station 3 can be reduced.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a diagram showing a configuration example of a zone / time memory according to the present invention. In the figure, 10a is a mobile terminal ID, 10b is wireless zone information, and 10c is date and time information. The wireless zone information 10b that exists for each mobile terminal 7 and the date and time information 10c when the communication is completed or when the communication path cannot be set are registered. The date and time information 10c may be only time information,
The year may be added to the information shown in the figure.

The operation mode of the mobile terminal calling system of the present invention using the zone / time memory 10 configured as described above is as follows. At the end of communication with the mobile terminal 7, the wireless zone in which the mobile terminal 7 is located and its time are stored in the zone / time memory 10. Next, when there is an incoming call at the mobile terminal 7, the in-area switching center 3 determines the date and time and the zone / time memory 10 at that time.
The time and date stored in the zone / time memory 10 is compared with the wireless zone information 10b if the time is within a certain time.
Is read out, and a general call (broadcast communication) is performed to that wireless zone or only to the wireless zones around it.

When an incoming call arrives at the mobile terminal 7, if the mobile terminal 7 is in a call or the path cannot be set for some reason, the in-zone switching station 3 finds out the wireless zone and the date and time information of the called mobile terminal 7 which was found. It is stored in the time memory 10. When an incoming call arrives at the mobile terminal 7, the in-zone switching center 3 compares the date and time at that time with the date and time in the zone / time memory 10, and if the time is within a certain time, the zone / time memory 10 wirelessly transmits. The zone information 10b is read out, and all the calls are made to that wireless zone or to the wireless zones around it. A user who has failed communication usually does not have much time since the beginning,
It is believed that the wireless zone around it is not far away.

When an incoming call arrives at the mobile terminal 7, the local exchange 3 stores in the zone / time memory 10 the wireless zone and the date and time information of the incoming mobile terminal 7 found, regardless of whether or not a path can be set. To do. When the mobile terminal 7 receives an incoming call, the in-zone switching center 3 compares the date and time at that time with the date and time in the zone / time memory 10, and if the time is within a certain time, the zone / time memory 10 wirelessly transmits. The zone information 10b is read out, and all the calls are made to that wireless zone or to the wireless zones around it.

FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention. In the embodiment shown in the figure, a redial center 20 is provided to substitute a redial by using a PB signal when a call is reissued. Other configurations are the same as the principle block diagram shown in FIG. The redial center 20 is connected to the gateway exchange 2 and the in-area exchange 3. The operation of the embodiment configured as described above will be described below.

(Embodiment 1) When the mobile terminal 7 completes communication,
The in-zone switching station 3 registers the wireless zone in which the originating mobile terminal 7 was located and the date and time in the zone / time memory 10. Furthermore, the wireless zone in which the incoming mobile terminal 7 is located and the date and time are set in the zone / time memory 1
Register to 0. After that, it is assumed that an arbitrary user dials one of the mobile terminals 7. On the network side, the date-and-hour information at that time in the in-area switching center 3 is compared with the date-and-time information registered in the zone / time memory 10. Then, when it is over a certain time, the serving exchange station 3
A call is made using the conventional location registration memory 4 and subscriber information memory 5.

If both date and time information are within a certain time, the visited exchange 3 searches the zone / time memory 10 to read the radio zone in which the terminating mobile terminal 7 is present, and the radio base station 6 Direct call is instructed only to the wireless base stations 6 in the vicinity of the wireless base station or in the vicinity thereof. Therefore,
According to the present invention, since only the corresponding wireless base station 6 or the wireless base stations 6 in the vicinity thereof are directly called, it is possible to reduce the burden on the in-area switching center 3. And the mobile terminal 7
If there is a response from, the network sets the path. If there is no response, the location exchange memory 3 in the existing location exchange memory 3
And making a call using the subscriber information memory 5.

(Embodiment 2) When the incoming mobile terminal 7 is in a call or the path cannot be set for some reason, the in-area switching center 3 determines that the incoming mobile terminal 7 is in the wireless zone,
The date and time information is registered in the zone / time memory 10. Then, when the arbitrary user dials the mobile terminal 7, the in-zone switching center 3 compares the date and time information at that time with the date and time information registered in the zone / time memory 10. As a result of the comparison,
If a certain time or more has elapsed, a call is made using the conventional location registration memory 4 and subscriber information memory 5. As a result of the comparison, if it is within a certain time, the zone / time memory 10 is searched to read the wireless zone in which the mobile terminal 7 is located, and only the wireless base station 6 or the wireless base stations 6 around it is read. Direct the call.
Therefore, according to the present invention, only the corresponding wireless base station 6 or the wireless base stations in the vicinity thereof are directly called, so that the burden on the in-area switching center 3 can be reduced. At that time, if there is an incoming call response from the mobile terminal 7, the network sets a path. If there is no response, a call is made using the conventional location registration memory 4 and subscriber information memory 5.

(Third Embodiment) A mobile terminal 7 (hereinafter referred to as terminal A)
When a call is made to another mobile terminal 7 (hereinafter referred to as terminal B), the wireless zone in which the incoming mobile terminal B is located and the date and time information of the zone / time memory 10 regardless of the success / failure of the path setting. Register in the area for terminal A. After that, when the calling user again calls the same mobile terminal B, the service area switching center 3 notifies the redial center 20 by a PB signal. The redial center 20 that received the notification is
Reads the wireless zone of the receiving terminal B, which was set / passed last time, from the zone / time memory 10 to the wireless base station 6 or the wireless base stations 6 around it.
Direct call only to. As a result, since only the corresponding wireless base station 6 or the wireless base stations in the vicinity thereof are directly called, the burden on the in-area switching center 3 can be reduced.

Further, according to the present invention, the communication path disconnection date / time information is registered in the zone / time memory 10, and based on this information, the in-area switching center 3 calls the conventional method or directly. You can decide whether to make a call.

Here, the zone / time memory 10 is
It is possible to perform dynamic allocation without providing it for each mobile terminal, so that the serving exchange station 3 deletes the zone / time information after a certain period of time.

Further, the service area switching center 3 can determine which wireless zone the incoming mobile terminal 7 is in and to which wireless zone to call the station, depending on the time elapsed from the time of the previous incoming call.

Further, the registration in the zone / time memory 10 is not limited to the time when the communication setting is impossible, but is performed when the communication setting is possible.
After the communication path is cut off on the way, it is possible to directly call the wireless zone where the incoming mobile terminal 7 is located even when the call is reissued.

Further, the communication path disconnection date / time information is registered in the zone / time memory 10, and the in-area switching center 3 uses the information to decide whether to make a conventional call or a direct call. You can

Further, the zone / time memory 10 is not provided in each mobile terminal 7 but is dynamically allocated so that the serving exchange station 3 erases the zone / time information after a certain period of time. You can

Further, the in-area switching center 3 can determine the radio zone in which the incoming mobile terminal is located and which radio zone around the radio zone in which the incoming mobile terminal is to be called, depending on the time elapsed from the time of the previous incoming call.

[0033]

As described above in detail, according to the present invention, the zone / time memory 10 is provided with the position registration radio zone information 10b and the date / time information 10c, so that the same mobile terminal 7 receives a call within a short period of time. When there is a redial, the designated exchange base station 6 does not have to issue a simultaneous call instruction to all the exchange base stations 6 in the location-registered control zone. Since it is only necessary to give an instruction to the service, the processing load on the service area switching center 3 is reduced. At present, the processing capacity in terms of software is the limit of the system capacity, so reducing the load on the software will improve the processing capacity of the entire system, and provide inexpensive services to users. be able to.

As described above, according to the present invention, it is possible to provide the mobile terminal calling system capable of reducing the burden on the service area switching center, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a diagram showing a configuration example of a zone / time memory according to the present invention.

FIG. 3 is a configuration block diagram showing an embodiment of the present invention.

FIG. 4 is a conceptual diagram of a configuration of a conventional system.

FIG. 5 is a diagram showing a configuration example of a position registration memory.

FIG. 6 is a diagram showing a configuration example of a subscriber information memory.

[Fig. 7] Fig. 7 is a diagram showing a state of broadcast communication of a service area switching center.

[Explanation of symbols]

 1 general telephone network 2 gateway exchange 3 visited exchange 4 location registration memory 5 subscriber information memory 6 wireless base station 7 mobile terminal 10 zone / time memory

Claims (10)

[Claims] 1. A gateway exchange (2) connected to a general telephone network (1), a visited exchange (3) connected to the gateway exchange (2), and these visited exchanges (3). ), A mobile terminal calling system composed of a radio base station (6) connected to the mobile base station (6) and a mobile terminal (7) communicating with the radio base station (6) wirelessly. The zone where the incoming mobile terminal (7) is located and the time and date information at that time is registered.
A mobile terminal calling system characterized in that a time memory (10) is provided for each mobile terminal. 2. At the time of the next incoming call, the service area switching center (3) searches the zone / time memory (10) and directly calls the wireless zone of the incoming mobile terminal (7). Item 1. A mobile terminal calling system according to item 1. 3. The zone / time memory (10) is registered even when an incoming call is possible, and at the time of the next incoming call, the serving exchange station (3) searches the zone / time memory (10),
2. The mobile terminal calling system according to claim 1, wherein the wireless zone of the incoming mobile terminal (7) is called directly. 4. The communication path disconnection date / time information is registered in the zone / time memory (10), and based on this information, the in-area switching center (3) performs a conventional call or a direct call. The mobile terminal calling system according to claim 1 or 3, wherein it is determined whether or not to perform. 5. The zone / time memory (10) is not provided for each mobile terminal, but is dynamically allocated, and the serving exchange station (3) erases the zone / time information after a lapse of a certain time. The mobile terminal calling system according to claim 4, wherein 6. When the called mobile terminal (7) does not exist in the called wireless zone, the serving exchange station (3) stores the mobile terminal and the usual location registration memory (4) in which the location information is registered. The mobile terminal calling system according to any one of claims 1 to 5, wherein the location registration information is read out and the communication path is set. 7. When the in-area switching center (3) makes a direct call to a wireless zone in which the terminating mobile terminal (7) is located,
The mobile terminal calling system according to any one of claims 1 to 6, wherein a call is also made to a zone around it. 8. The in-area switching center (3) is configured to determine to which wireless zone the receiving terminal is located and to which wireless zone the area is to be called, depending on the time elapsed from the time of the last incoming call. 7. Any one of claims 4 to 6
Mobile terminal calling system according to claim 1. 9. A redial center (20) is provided for substituting a redial by using a PB signal when the call is recalled, and the service area switching center (3) is provided with the redial center (2) when the call is recalled.
The mobile terminal calling system according to claim 1, characterized in that by issuing a re-calling instruction to (0), the calling zone directly calls the wireless zone in which the mobile terminal (7) having received the call last time. 10. The incoming mobile terminal (also referred to as the incoming mobile terminal when registering in the zone / time memory (10) is not limited to the time when communication setting is not possible, and is also performed when communication setting is possible and the communication path is cut midway. 10. The mobile terminal calling system according to claim 9, wherein the wireless zone in which 7) is present can be called directly.