JPH0568004A - Mobile communication control method - Google Patents

Abstract

PURPOSE:To obtain the excellent mobile communication control method having a high communication efficiency by reducing a useless position registration request with respect to a radio control station. CONSTITUTION:A mobile station 13 is provided with a setting means used to set a prescribed value representing a zone cross number of times moved from a radio zone at a current position to other radio zone and with a position registration means used to send position information of a radio zone in which the mobile station is resident when the zone cross number of times reaches the prescribed value, and a radio control station consists of a master equipment 11 and plural base stations 12a-12p, registers the position information sent from the mobile station 13 to its memory and sets plural radio zones including the radio zone in which the mobile station is resident to a service area used for the calling of an incoming signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station and a radio control station which registers position information of the mobile station and communicates with the mobile station in a communication area composed of a plurality of radio zones. The present invention relates to a mobile communication control method for location registration and incoming call processing.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional mobile radio communication system showing a communication area including a mobile station, a radio control station, and a plurality of radio zones. In FIG. 3, reference numeral 21 denotes a main device, which is a region surrounded by a thick line 22X and 22X.
Y is a communication area called a service area or a calling area. The calling areas 22X and 22Y are each formed by seven wireless zones (hexagonal portions surrounded by thin lines in the figure). However, the actual shape of the wireless zone is a circle or an ellipse, and it may be deformed under the influence of surrounding buildings. Further, the boundaries of the wireless zones are not separated by lines as shown in FIG. 3, and the surrounding areas overlap each other. However, here, in order to facilitate the description, the wireless zone is hexagonal as shown in FIG.

Reference numerals 22a to 22g are base stations arranged in respective radio zones of the calling area 22X, and 22h to 22n are base stations arranged in respective radio zones of the calling area 22Y (hereinafter, for example, the base station 22a is The existing wireless zone is referred to as a wireless zone 22a). Main device 21
And the plurality of base stations 22a to 22n constitute a radio control station that communicates with the mobile station. A mobile station 23 performs wireless communication with the wireless control station while moving within the service area.

Next, the operation of the above conventional example will be described. In FIG. 3, the mobile station 23 is located in the wireless zone 22g, and the area of the incoming call is the wireless zone 22g.
Calling area 2 up to wireless zone 22g centered on a
It is a fixed area of 2X.

Next, when the mobile station 23 moves from the radio zone 22g to the radio zone 22j, the mobile station 23 determines that the mobile station 23 has crossed the boundary between the calling area 22X and the calling area 22Y. Request registration of location information.

The main device 21 that has received this location registration request
Registers the position information of the mobile station 23 in the home memory.
After the registration of the position information, by setting the calling area 22Y as an incoming call area, incoming call processing to the mobile station 23 becomes possible.

[0007]

However, in the above-mentioned conventional method, since the calling area is fixed, for example, the mobile station 23 has the wireless zone 22g and the wireless zone 22j.
When going back and forth between and, the location registration request to the main device 21 is frequently generated. Therefore, the main device 2
In No. 1, the calling area had to be changed frequently, and the incoming call processing had to be performed for all the wireless zones in the calling areas 22X and 22Y.

Therefore, there is a problem that communication efficiency is deteriorated due to generation of useless location registration requests, and at the same time, a wide communication path is occupied during the incoming call, which hinders other mobile stations.

The present invention solves such a conventional problem and provides an excellent mobile communication control method having high communication efficiency by reducing unnecessary position registration requests to the radio control station. With the goal.

[0010]

In order to achieve the above object, the present invention has the following mobile station configuration and various radio control station configurations.

1. The mobile station is a setting means for setting a predetermined value of the number of times of crossing the zone moving from the wireless zone of the current position to another wireless zone, and when the number of times of crossing the zone reaches a predetermined value, the mobile station of the wireless zone in which the mobile station is located. A location registration requesting means for transmitting location information to the radio control station is provided.

2. The radio control station registers the position information transmitted from the mobile station in the memory, and sets a plurality of radio zones centering on the radio zone in which the mobile station is located in the incoming call area.

3. The radio control station includes means for setting the range of the calling area for each mobile station, and makes an incoming call to the mobile station in the calling area of the set range.

4. The radio control station is provided with a position predicting means for predicting a future position of the mobile station in response to a position registration request from the mobile station, and receives a call to the mobile station with respect to a calling area including a radio zone in which the future position is located. Make a call.

[0015]

The present invention has the following actions due to the above construction.

1. The mobile station counts the number of times it has crossed the boundary of the wireless zone, and when it reaches the preset number of times, it makes a position registration request to the wireless control station, so unnecessary position registration requests frequently occur. Can be suppressed.

2. The radio control station manages the paging area for each mobile station by registering the position information of the mobile station, and manages the variable paging area centered on the radio zone of the current position of the mobile station, thereby Unnecessary incoming calls can be reduced.

3. Since the radio control station sets the range of the calling area for each mobile station, it is possible to ensure an incoming call to the mobile radio control station.

4. The radio control station comprises means for predicting the future position of the mobile station based on the history of location information registered in the home memory in response to a location registration request from the mobile station, and a calling area including a radio zone in which the future location is located. Is set, it is possible to ensure an incoming call to the mobile station.

[0020]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a configuration of a service area which is a communication area between a radio control station (main device and base station) and a mobile station in the embodiment of the present invention. In addition, FIG.
FIG. 2A is a flowchart of the location registration request process executed by the mobile station in the embodiment of the present invention, and FIG. 2B is a flowchart of the memory update registration process executed by the radio control station.

In FIG. 1, 11 is a main unit having a home memory for registering position information of mobile stations, and 12a to 12n.
Is a plurality of base stations that accommodate a wireless zone (hexagonal area in the figure) while communicating with the main device 11. The main device and a plurality of base stations form a radio control station. A mobile station 13 performs wireless communication with a wireless control station in a service area (communication area) including a plurality of wireless zones. Although not shown in the figure, the mobile station 13 includes a counter that counts the number of zone crossings each time the mobile station 13 crosses a boundary between wireless zones. This boundary detection method is performed, for example, by determining the identification signal unique to the base station and the strength of the radio wave.

Next, the operation of the above embodiment will be described with reference to FIG.
This will be described with reference to the flowcharts of (a) and (b). In FIG. 2A, when the power is turned on, the mobile station 13 issues a position registration request for the current position, that is, the wireless zone in which it is located, to the wireless control station (main device / base station) (step S1). ). Then, the initial value of the counter value n is set to 0 (step S2). Thereafter, it is determined whether or not the zone has been crossed (step S3), and when the zone has been crossed, the value n of the counter is incremented (step S4). It is determined whether or not the value n of this counter has reached a preset value N (step S
5) If N is not reached, the process returns to step S3 to execute the subsequent steps. If N is reached, the process returns to step S1 to issue a position registration request. After that, the processes of steps S1 to S5 are repeatedly executed.

For example, when N = 2, in FIG. 1, when the mobile station 13 moves from the current position of the wireless zone 12g to the wireless zone 22p, that is, when the counter value n is 1, the wireless Does not issue a location registration request to the control station. The mobile station 13 further moves to the wireless zone 22j and issues a location registration request when n = 2.

Therefore, according to the movement situation of the mobile station 13,
By appropriately setting the value of N set in advance, useless position registration requests can be reduced.

In FIG. 2B, the radio control station having received the location registration request from the mobile station 13 activates a location registration subroutine (step S5). And the main device 11
The location information registered in the home memory therein is updated, and the calling area for making an incoming call to the mobile station 13 whose location information has been updated is updated (step S7), and the location registration subroutine ends.

After that, when a call request is made to the mobile station 13 from another mobile station or a general subscriber terminal, the radio control station displays the mobile station identification number such as the telephone number registered in the home memory. , And based on the position information corresponding to this identification number, an incoming call is made to the calling area including the wireless zone in which the mobile station 13 is located.

In determining the area of this incoming call, there are various embodiments as described below. The first embodiment of determining the calling area is centered on the wireless zone in which the mobile station is located,
The calling area is a range including a plurality of adjacent wireless zones. For example, in FIG.
Is located in the wireless zone 12g, the calling area is centered on the wireless zone 12g, and is adjacent to the wireless zones 12a, 12b, 12f, 12j, 12p, 12o.
A total of seven wireless zones are used as calling areas. Next, after the mobile station 13 moves to the wireless zone 12j and the location information is updated, the calling area is the wireless zone 12j,
7 of 12g, 12f, 12k, 12h, 12i, 12p
There will be one wireless zone.

Therefore, according to the first embodiment, since the calling area is not fixed and is variable according to the moving condition of the mobile station, the range of useless incoming calls can be reduced, so that the communication efficiency is improved. Can be improved, and it can be avoided that it interferes with other mobile stations.

In the second embodiment of determining the calling area, the size of the range including a plurality of wireless zones around the wireless zone in which the mobile station is located is set for each mobile station. .. Specifically, a wireless zone adjacent to the wireless zone in which the mobile station is located is set as a zone of distance 1, and a wireless zone adjacent to the zone further outside the zone of distance 1 is set at distance 2
Then, an arbitrary distance is determined around the existing wireless zone. Then, an appropriate distance range is set as a calling area for each mobile station. The setting of the calling area, that is, the distance is determined for each mobile station based on the conditions such as the moving range and speed of the target mobile station.

Therefore, according to the second embodiment, a reliable incoming call can be made to each mobile station.

In the third embodiment of determining the calling area, the radio control station is provided with a position predicting means, and the position information of the home memory in the main unit 11 is updated in response to a position registration request from the mobile station. The history of position information is retained. Then, the traveling direction of the mobile station, that is, the future position is predicted, and a calling area including the predicted position is determined.

For example, in FIG. 1, the mobile station 13 is a car telephone installed in a vehicle, and the wireless zones 12b, 1
2g, 12j, ..., The case where it is moving at high speed is assumed.

In this case, the calling direction is determined by predicting the traveling direction of the mobile station, that is, the future position by the position predicting means from the current position information in the home memory and the previous position information or the previous position information. Is. For example, the calling area when the current wireless zone in which the mobile station 13 is located is 12g is set to 12g, 12j, 12h, or a fan-shaped area that spreads in the traveling direction of the mobile station 13.

By thus predicting the future position of the mobile station and determining the calling area, the service to the mobile station can be improved and the communication efficiency can be improved.

[0035]

As is apparent from the above embodiment, the mobile communication control method according to the present invention has the following effects.

1. The mobile station counts the number of times it has crossed the boundary of the wireless zone, and makes a location registration request when the number of times reaches a preset number, which has the effect of suppressing the frequent occurrence of useless location registration requests. ..

2. The radio control station manages the paging area for each mobile station by registering the position information of the mobile station, and manages the variable paging area centered on the radio zone of the current position of the mobile station, thereby At the time of incoming call, it is effective in reducing unnecessary incoming call and improving communication efficiency.

3. Since the radio control station sets the range of the calling area for each mobile station, it has the effect of ensuring the incoming call to the mobile radio control station and at the same time improving the communication efficiency.

4. The radio control station has means for predicting the future position of the mobile station according to the history of location registration requests from the mobile station, and sets a calling area including the radio zone in which the future position is located. And at the same time has the effect of improving communication efficiency.

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration according to an embodiment of the present invention.

2A is a flowchart of a location registration request process of a mobile station, and FIG. 2B is a flowchart of a memory update registration process of a radio control station.

FIG. 3 is a diagram showing a conventional system configuration.

[Explanation of symbols]

 11, 21 Main device 12a to 12p, 22a to 22n Base station 13,23 Mobile station 22X, 22Y Fixed call area

Claims (5)

[Claims] Claim: What is claimed is: 1. A mobile radio station comprising a memory for registering position information of the mobile station, and a radio control station communicating with the mobile station in a communication area comprising a plurality of radio zones. A communication control method, wherein the mobile station sets a predetermined value of the number of times of zone crossing moving from the wireless zone of the current position to another wireless zone, and when the number of times of zone crossing reaches the predetermined value. And a location registration requesting means for transmitting location information of a radio zone in which the mobile station is located to the radio control station. 2. A mobile communication between a mobile station and a radio control station which comprises a memory for storing position information of the mobile station and which communicates with the mobile station in a communication area composed of a plurality of radio zones. In the control method, the radio control station registers position information transmitted from the mobile station in the memory, and a plurality of radio zones centering on a radio zone in which the mobile station is located in the communication area. A mobile radio control method comprising: 3. A mobile communication between a mobile station and a radio control station which is provided with a memory for storing position information of the mobile station and which communicates with the mobile station in a communication area composed of a plurality of radio zones. A control method, wherein the radio control station includes means for setting a range of the communication area for each mobile station, and makes an incoming call to the mobile station in the communication area of the set range. Mobile communication control method. 4. A mobile communication between a mobile station and a radio control station which comprises a memory for storing position information of the mobile station and which communicates with the mobile station in a communication area composed of a plurality of radio zones. In the control method, the radio control station, in response to the location registration request from the mobile station, comprises a position prediction means for predicting a future position of the mobile station, the wireless zone in which the future position is located. A mobile communication control method, characterized in that an incoming call is made to the mobile station in a communication area including the communication area. 5. The radio control station includes a plurality of base stations accommodating at least one radio zone, and a main device having the memory and accommodating the base stations. 4. The mobile communication control method described in 4.