JPH09149452A - Mobile communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a speaking state even when moving from an area in which the speech is established to another area in a speaking state by reserving a communication link to use for communication by means of a mobile terminal prior to the moving of the mobile terminal. SOLUTION: A control part 42 allows a user to move at about a speed of walking within the areas of exchanges 31 to 33 to maintain the speech of user's mobile terminal 11. In addition the control part 42 specifies mobile terminal terminating equipments 21 to 26 and the exchanges 31 to 33 at the moving destination of the mobile terminal 11 based on history information held in a mobile history storing part 43 and reserve-processes the communication link the mobile terminal terminating equipments 21 to 26 and the exchanges 31 to 33 at the specified moving destination use for communication by means of the mobile terminal 11 prior to the moving of the mobile terminal 11. Thus user's inconvenience of shifting to the speaking state again after the speaking state is temporarily released is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication device that allows a user to talk while moving. In particular, the present invention relates to securing a call in a device that allows a mobile terminal to move at a speed comparable to that of a human walking.

[0002]

2. Description of the Related Art A conventional mobile communication system is roughly classified into a high-speed mobile communication system in which communication is possible even from a high-speed moving body such as an automobile, and a free movement at a speed equivalent to that of a human walking. System (hereinafter "low-speed mobile communication system")
There is).

In the high-speed mobile communication system, when the user moves while in a call, the call is guaranteed not only in the area where the call is established, but also when the user reaches the adjacent area beyond the area. This is because the exchanges accommodating the radio base stations that communicate with the mobile terminals by radio lines in each area are connected to the exchanges in other areas by a mesh-like relay line network. Is. That is,
When the mobile terminal goes beyond the area, the destination exchange that accommodates the radio base station in the new area and the exchange that accommodates the radio base station that receives and receives the call are connected by a trunk line, and the call status of the terminal Guarantee. This is equivalent to that the exchange that first receives and receives the call becomes the transit exchange for the destination exchange and sets the line. In the high-speed mobile communication system, the large zone system in which the wireless zone per base station is several kilometers is used, and since the base station and the exchange uniquely correspond to each other, the relay line (destination exchange) to be reserved is specified. It's easy to do. However, since the relay line is used, when the user moves through many zones, the relay resources are required accordingly.

On the other hand, in the low-speed mobile communication system, a small zone system using a wireless zone of about several hundred meters is used, assuming a range in which the user can move while walking even if the user moves while talking. In the small zone system, since one exchange accommodates a plurality of base stations (mobile terminal equipment), it is not possible to uniquely specify the exchange to which the destination is moved. Therefore, in the low-speed mobile communication system, there is a constraint condition that the call is guaranteed only in the area where the call is established and the call is disconnected when reaching the adjacent area beyond the area. This is because a relay exchange exists between the source exchange and the destination exchange, so it takes time to switch the relay line, and because the relay line is set separately, the call is released once and then again. This is because it is necessary to put it in a call state. As described above, in the low speed mobile communication system, a call when the user moves beyond the area is not guaranteed.

[0005]

When a user is in a call and moves to a new area beyond the area where the call is allowed to move, a new switch is placed under the jurisdiction of the new area. By establishing a proper communication link, the call status can be guaranteed. However, in the conventional low-speed mobile communication system, in order to establish a communication link, it is necessary to exchange control signals therefor between the source exchange and the destination exchange, which takes time. For this reason, the user has the inconvenience of once returning from the call state and then returning to the call state.

The present invention solves such a problem, and the mobile communication of the low speed mobile communication system which can maintain the communication state even when the communication is moved from the area where the communication is established to another area while the communication is in progress. The purpose is to provide a device.

[0007]

A mobile communication device of the present invention comprises a plurality of exchanges, and at least some of the exchanges (hereinafter, particularly "subscriber exchanges") are connected to a mobile terminal. One or more mobile terminal terminating equipments terminating each wireless circuit are connected to each of the subscriber exchanges, and an area formed by one or more mobile terminal terminating equipments connected to the exchanges (hereinafter simply referred to as "exchange area").
In the mobile communication device including means for allowing the user to move at a speed of walking, and maintaining the call of the user's mobile terminal, each subscriber exchange has an area of the exchange. When a mobile terminal moves in a call state, the movement history holding means for holding the movement state as history information, and the movement destination of the mobile terminal based on the history information held in the movement history holding means Means for identifying the mobile terminal terminal device and the exchange, and means for reserving the communication link used by the mobile terminal termination device and the exchange of the specified destination for communication by the mobile terminal prior to the movement of the mobile terminal. It is characterized by including.

[0008] Specifically, when the user is moving in a telephone call state by registering the position information indicating the position of the user in the destination network and transferring the contract information from the home switch of the user. In addition, the movement of the user is constantly monitored by the exchange and the movement state is retained as history information. Then, based on these movement history information, the adjacent mobile terminal terminating device and the destination exchange are predicted and specified, and the communication link between the predicted mobile terminal terminating device, the predicted destination exchange, and the transit exchange is reserved. When there are a plurality of adjacent mobile terminal terminating devices or destination exchanges, a plurality of communication links are reserved between the plurality of mobile terminal terminating devices or exchanges and the transit exchange. The wireless section is not reserved, and the wireless link is set by the connection request from the terminal. Further, the contractor information is transferred to an exchange that is predicted in advance for reservation, and the contract information is confirmed in advance.

The deletion of the movement history temporarily held in the exchange of the movement source is performed as follows. That is, when the user moves to another exchange (destination exchange), the movement history of the movement source is erased upon the transfer of the movement history to the destination exchange. Alternatively, when the user has not moved after a certain period of time, the temporarily stored movement history is deleted in consideration of effective use of the storage area. The movement history may be erased when the user's call ends.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention, showing a device configuration provided in a mobile communication network. This device is provided with a plurality of subscriber exchanges 31 within the network.
33 to 33 and a relay exchange 71, the subscriber exchange 31
Are connected to mobile terminal terminating devices 21 to 23 terminating a wireless line with the mobile terminal, and the subscriber exchange 32 is also connected to mobile terminal terminating devices 24 to 26. Although a mobile terminal terminating device is also connected to the subscriber exchange 33, it is not shown. Connections between the subscriber exchanges 31 to 33 and the respective mobile terminal terminating devices 21 to 26 are made by subscriber lines which are physical lines. Also provided in the network are a location information database 51 that manages location information of each mobile terminal and a home exchange 61 that manages contract information of users of each mobile terminal. The position information database 51 may be provided separately from the exchange or may be provided in any of the exchanges. Subscriber switch 31-3
3, the position information database 51, the home exchange 61, and the transit exchange 71 are connected to each other by a direct or indirect communication link via another exchange.

Each of the subscriber exchanges 31 to 33 has a line switching unit 41 for performing line switching, a control unit 42 for controlling the line switching unit 41, and a mobile terminal moving within the area of the exchange while the mobile terminal is busy. At some times, a movement history storage unit 43 for temporarily storing movement history information that holds the movement state as history information is provided. The control unit 42 allows the user to move within the area of the exchange at a speed of walking, and maintains the call of the mobile terminal of the user.
The control unit 42 also identifies the mobile terminal terminating device and the exchange of the destination of the mobile terminal based on the history information held in the movement history storage unit 43, and the mobile terminal terminating device and the exchange of the identified destination are identified. A process of reserving a communication link used for communication by the mobile terminal prior to the movement of the mobile terminal is performed.

Here, it is assumed that the mobile terminal 11 is connected to the subscriber exchange 31 via the mobile terminal terminating device 21 and is communicating with the other party via the relay exchange 71. The contract information of the user of the mobile terminal 11 is managed by the home exchange 61. When the mobile terminal 11 moves from the radio zone of the mobile terminal terminating device 21 under the subscriber exchange 31 to the radio zone of the mobile terminal terminating device 22 connected to another subscriber line of the same subscriber exchange, the subscriber Since it is a movement within the exchange 31, the location information database 51 is not accessed, and the movement history (trajectory) of the mobile terminal 11 within the subscriber exchange 31 is stored in the movement history storage unit 43.

Here, it is assumed that the mobile terminal terminating device 22 is installed at the boundary of the area between the subscriber exchange 31 and another subscriber exchange 32. At this time, the control unit 42 of the subscriber exchange 31 predicts the next movement direction from the movement history stored in the movement history storage unit 43, and the adjacent exchange (herein, referred to as the subscriber exchange 32) in the movement direction is predicted. , Transfer the user contract information of the mobile terminal 11 via the home exchange 51. Subscriber exchange 3 to which this user contract information has been transferred
In 2, the communication link with the transit exchange 61 is set in advance and the area switching instruction signal from the mobile terminal 11 is waited for. When a plurality of exchanges are predicted as the moving direction of the mobile terminal 11, for example, two subscriber exchanges 32 and 33 are predicted, each sets a communication link with the transit exchange 61.

It is assumed that the mobile terminal 11 generates a switching instruction and the mobile terminal terminating device 24 receives the switching instruction. At this time,
The subscriber exchange 3 to which the mobile terminal terminating device 24 is connected
2 connects the line from the mobile terminal 11 to the repeater exchange 71 and the line set in advance. At the same time, the destination subscriber exchange 32 transfers and registers information on the identifier of the mobile terminal 11 and the location in the network to the location information database 51, and at the source subscriber exchange 31 the user of the mobile terminal 11 is registered. Delete contract information.
Regarding the movement history, the subscriber exchange 31 of the movement source
Is transferred to the destination subscriber exchange 32 and stored in the movement history storage unit 43 in the subscriber exchange 32.

Next, an example of accumulating movement history information will be described with reference to FIGS.

FIG. 2 shows an example of a storage format of the movement history storage unit 43. The movement history storage unit 43 stores, for each user number of the mobile terminal, the identifier of the home exchange in which the contract information of the user of the mobile terminal is stored, the contract information of the mobile terminal, and the movement history of the mobile terminal. Information is stored. The movement history information is represented by the subscriber line number that the mobile terminal has used so far. Taking the mobile terminal 11 as an example, the contract information of the user is stored in the home exchange 61, and when the mobile terminal 11 is connected to the subscriber exchange 31, the home exchange 61 to the subscriber exchange 3
1, and is stored in the movement history storage unit 43. When the mobile terminal 11 is using the mobile terminal device 21,
When the number of the subscriber line to which the mobile terminal terminating device 21 is connected is written as movement history information and the mobile terminal 11 moves to the radio zone of another mobile terminal terminating device 22,
The number of the subscriber line to which the mobile terminal terminating device 22 is connected is added. That is, the movement history is recorded by the subscriber line number. The mobile terminal 11 is a subscriber exchange 31
When the area boundary is reached, one or a plurality of destination exchanges accommodating adjacent subscriber lines are predicted based on the movement history information.

FIG. 3 shows a flow of a storage process in the movement history storage unit 43. The mobile terminal terminating device 2 connected to the accommodated subscriber line in the source subscriber exchange 31
When the mobile terminal 11 makes a call via 1, the control unit 42 secures a storage location in the movement history storage unit 43. Then, when the storage location is secured, the identifier of the home exchange is obtained from the number of the mobile terminal 11, the home exchange 61 is accessed according to the identifier, the contract information is received, and stored in the movement history storage unit 43. The transfer of the contract information from the home exchange 61 to the subscriber exchange 31 may be performed when the contract information authentication determination is made for the call from the mobile terminal 11. Next, the position of the mobile terminal 11 is identified by the number of the subscriber line to which the mobile terminal terminating device 21 used by the mobile terminal 11 is connected, and the number is stored as movement history information. Further, it monitors whether the mobile terminal 11 has moved from the wireless zone of the mobile terminal terminating device 21, and when it has moved to the radio zone of the mobile terminal terminating device 52, the mobile terminal terminating device 52 is connected to the subscriber line to which it is connected. Add and remember the number. In the subsequent movement, similarly, the subscriber line number is stored as movement history information.

FIG. 4 is a diagram for explaining a destination area prediction method based on the movement history information. Here, an area X is formed by each wireless zone of the mobile terminal terminating device accommodated in the source subscriber exchange 31 and an area X is formed by each wireless zone of the mobile terminal terminating device accommodated in the destination subscriber exchange 32. Suppose Y is formed. Also,
The area X includes the wireless zone A by the mobile terminal terminating device 21 and the wireless zone B by the mobile terminal terminating devices 22 and 23, and the area Y includes the mobile terminal terminating device 24.
It is assumed that the wireless zones C, D, and E according to each of .about.

When the mobile terminal 11 in communication via the mobile terminal terminating device 21 moves from the radio zone A to the zone of the mobile terminal terminating device 22 in the radio zone B, this mobile terminal 11
Transmits the movement information (positional information) to the mobile terminal terminating device 22, and the subscriber exchange 31 uses the movement information to identify the subscriber line connected to the relay exchange 71 and the mobile terminal terminating device 21.
To the one connected to the mobile terminal device 22. At this time, the subscriber number is stored as movement history information. Further, by using this movement history information, the location information database 51 (not shown in FIG. 4) is accessed, and the mobile terminal terminating device 21 connected to the subscriber line before switching and the subscriber line after switching are connected. The distance and direction on the map with the mobile terminal terminating device 22 are obtained. Then, when it is predicted that the mobile terminal 11 has reached the area boundary from the moving time, the next moving direction is predicted.

At this time, if the mobile terminal terminating device 22 is located near the boundary with the radio zone C, the mobile terminal 1
1 is expected to move to wireless zone C. This is the prediction of the subscriber exchange 32. When the mobile terminal 11 communicates with the mobile terminal terminating device 23 arranged near the boundary with the radio zone D, the movement to the radio zone D is predicted.

Although the wireless zone C is predicted, the mobile terminal 1
If 1 turns in the direction of the mobile terminal terminating device 23 in the wireless zone B, the prediction will fail. However, since there are a plurality of mobile terminal terminators in the wireless zone and the exchange area that accommodates the mobile terminal terminators is large, the probability of zone prediction failure is low. Also,
Even if the zone prediction fails, if the destination wireless zone is in the same area of the subscriber exchange as the predicted zone, the reservation of the trunk line with the trunk exchange 71 will succeed, and the line reservation will fail. The probability of doing is extremely low.

FIG. 5 shows the flow of the trunk line reservation process when it is predicted that the mobile terminal will move to another exchange area. First, the predicted destination exchange (subscriber exchange 3
The contract information of the user terminal (mobile terminal 11) moving to 2) is transferred. Next, based on the movement history information, the optimum mobile terminal terminating device (mobile terminal terminating device 2 in the destination exchange)
4) Predict the subscriber line connecting to 4). Then, the communication link between the predicted subscriber line and the transit exchange (71) that relays the communication between the mobile terminal is reserved. When there are a plurality of subscriber lines that can be connected (for example, the destination exchange 33 in FIG. 1), the communication link between the subscriber line and the transit exchange is predicted. After that, triggered by the user moving from the mobile terminal terminating device (22) connected to the source exchange to the mobile terminal terminating device (24) connected to the destination exchange, the mobile terminal moves from the location information database (51). )
Register the location registration information in. At the same time, the communication link between the source exchange and the transit exchange is switched to the communication link between the destination exchange and the transit exchange. By using the switched communication link, the mobile terminal can make a non-instantaneous call. After that, the movement history information of the source exchange is deleted. The destination exchange stores the subscriber line to which the mobile terminal is connected in the wireless zone of the mobile terminal terminating device, and repeats the storage processing of the movement history information.

FIG. 6 shows a flow of processing for erasing the movement history information. It is predicted that the mobile terminal (11) will move to another exchange area, and the destination exchange (subscriber exchange 3
When the contract information is transferred to 2) and the movement of the mobile terminal from the source exchange (subscriber exchange 31) to the destination exchange (subscriber exchange 32) is completed, the source exchange erases the movement history information. Also, when the call from the mobile terminal is disconnected, the movement history information is deleted at that time.

[0024]

As described above, according to the present invention, when a user moves to another exchange, if a new communication link is established in the exchange having jurisdiction over the area, the call state is guaranteed. be able to. For this reason, it is possible to eliminate the inconvenience of the user such that the user once cancels the call state and then returns to the call state.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a storage format of a movement history storage unit.

FIG. 3 is a diagram showing a flow of storage processing in a movement history storage unit.

FIG. 4 is a diagram illustrating a destination area prediction method based on movement history information.

FIG. 5 is a diagram showing a flow of a trunk line reservation process when it is predicted that the mobile terminal will move to another exchange area.

FIG. 6 is a diagram showing a flow of processing for erasing movement history information.

[Explanation of symbols]

 11 Mobile Terminals 21-26 Mobile Terminal Termination Devices 31-33 Subscriber Switch 41 Circuit Switching Section 42 Control Section 43 Movement History Storage Section 51 Position Information Database 61 Home Switch 71 Relay Switch

Claims (4)

[Claims] 1. A plurality of exchanges, wherein at least some of the plurality of exchanges are connected to one or more mobile terminal terminating devices for terminating a wireless line with a mobile terminal, respectively. Each of the exchanges allows the user to move at a speed equivalent to walking in an area formed by one or more mobile terminal terminating devices connected to the exchange, and maintains the call of the mobile terminal of the user. In the mobile communication device including means for performing at least some of the exchanges, when the mobile terminal moves in a busy state in an area formed by one or more mobile terminal terminating devices connected to the exchange, A movement history holding unit that holds the movement state as history information, and a mobile terminal to which the mobile terminal moves based on the history information held by the movement history holding unit. Means for identifying the end device and the exchange, and means for reserving the communication link used by the identified mobile terminal terminating device and exchange for communication by the mobile terminal prior to the movement of the mobile terminal. A mobile communication device characterized by the above. 2. The reservation means includes means for transferring contract information of a moving mobile terminal to a destination exchange before moving the mobile terminal to confirm the contract information in advance. Mobile communication device. 3. The switching means from the destination exchange to the intermediate exchange so as to switch the communication link from the source exchange to the first transit exchange of the communication links used by the mobile terminal for the call. The mobile communication device of claim 1, including means for reserving a communication link up to. 4. The mobile communication device according to claim 3, wherein switching of the communication link is performed without interruption.