JPH07135678A - Zone number changeover system in mobile communication system - Google Patents

Abstract

PURPOSE:To reduce power consumption of a portable telephone set by inducing a position registration signal to the portable telephone set only when a network side requires position registration information. CONSTITUTION:The position of a portable telephone set 20 is registered in a zone A. A network (radio base station 18-1) informs a zone number of the zone A as a number A, to the portable telephone set 20 periodically at that time. When the radio base station 18-1 requires position registration from the portable telephone set 20 in the zone A, the station 18-1 changes the zone number A. in the zone A (shown in solid lines) into a zone number A. (shown in dotted lines) Thus, this is similar to the case that the portable telephone set 20 in the zone A is moved to the outside of the zone A and the portable telephone set 20 detects a change in the zone number to induce the position registration.

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, and more particularly to location registration in a second generation digital cordless system in which a plurality of mobile stations having different specifications coexist.

[0002]

2. Description of the Related Art In a mobile communication system, when an incoming call is made to a mobile station which is a subscriber terminal, it is necessary to make a call based on the location of the mobile station in order to prevent an invalid call to an absent area. Therefore, the service area is divided into appropriate sizes, that is, zones, which are used as the position identification unit (position registration area) of the mobile station.

Conventionally, in such a cordless system in mobile communication, each manufacturer induces location registration from a network side to a mobile station at regular intervals by a unique protocol, thereby registering and releasing location registration information. And had been updating.

[0004]

On the other hand, in the second-generation digital cordless system, a multi-vendor (multi-v) of a mobile phone constituted by products of a plurality of different manufacturers.
The standardization of the protocol is being advanced so as to be compatible with the endor), and the registration and update of the location registration information are performed by the initiative of the mobile phone which is a mobile station.

Therefore, in the prior art in which location registration is triggered by a unique protocol when the network side requires location registration information, there is a problem that a mobile phone which does not support this protocol cannot enjoy the service. there were.

[0006] Further, according to the standard protocol, it is said that the mobile phone does not need to re-register its position until the movement to a different zone is detected. Therefore, if the network side loses the location registration information due to a failure, etc., the conventional method cannot induce location registration for mobile phones that do not support the original protocol, and it is determined that the location registration is required again due to movement, etc. The location registration information remains lost until the location registration of the telephone, and there is a problem that the tracking exchange cannot be performed for the mobile telephone.

The present invention solves the above-mentioned drawbacks of the prior art, and when the network side needs location registration from the cell phone due to the loss of location registration information including the multi-vendor of the cell phone, the system can be used. In order to provide a zone number switching method for mobile communication systems that can trigger location registration even for mobile phones that do not support the original protocol, quickly restore and update location registration information, and enable tracking and exchange. To aim.

[0008]

According to the present invention, in order to solve the above problems, when a mobile station moves to a zone of a different radio base station, the mobile station stores the zone number assigned to the radio base station. By registering the location of
In a zone number switching method in a mobile communication system that enables communication in multiple zones, a wireless base station is assigned multiple zone numbers for a single zone,
By switching the zone number, the location registration is triggered for the mobile station in the zone of the radio base station.

[0009]

According to the present invention, one zone has a plurality of zone numbers assigned to radio base stations and the like, and when the network side requires location registration from a mobile station, the zone numbers of the zones are set to different values. By switching, the mobile station moves to another zone, determines that location registration is necessary, and induces location registration, whereby the network side registers, releases, and updates location registration information.

[0010]

Embodiments of the zone number switching system in a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are system configuration diagrams showing an embodiment of a zone number switching system in a mobile communication system according to the present invention. The telephone circuit (TSW) 10 is
It is a switching circuit that controls connection of a call of a mobile phone (PS) 20, which is a mobile station, by a central processing unit (CPU) 12. The call circuit 10 includes a radio base station (B) to which a plurality of zone numbers are given via a plurality of radio control circuits (FIU) 16-1 to 16-n which are bidirectional trunks.
S) 18-1 to 18-n connected to each radio base station 18
The call processing of the mobile phone 20 in the zone is performed.

The radio control circuit 16 also includes a mobile phone 20.
When the location registration is required, the zone number of each zone of the connected wireless base station 18 is switched to a different value under the control of the central processing unit. As a result, the mobile phone 20 is moved to another zone and it is determined that the location registration is necessary, the location registration is triggered, and the location registration information is registered, released and updated on the network side. The information in which the registration, cancellation and updating of the position registration information is performed by this processing is stored in the main memory (MEM) by the central processing unit.

The main storage device is a memory for storing various data such as a call processing program of the central processing unit and location registration information. In the present embodiment, the call circuit 1
0, the central processing unit 12, the main memory 14 and the wireless control circuit 16 form a mobile communication switching center. Further, although the mobile communication switching center is not connected to another switching center (upper station, etc.) in the same figure, it goes without saying that a communication system including the upper station is also included in the scope of the present invention.

Next, the operation of this embodiment will be described with reference to FIGS. In FIG. 2, the mobile phone 20 is registered in the zone A. At this time, the network (radio base station 1
8-1) periodically notifies the mobile phone 20 of the zone number with the zone number of the zone A as A ₁ .

When the mobile phone 20 moves to the zone B (zone number B _{1 at} this time), the network (the radio base station 18-
1) It is detected that the zone number A ₁ periodically notified by the network has changed to the zone number B ₁ periodically notified by the network (radio base station 18-2), and the location is registered.

FIG. 1 shows an example of zone number switching in a single zone. When the network (radio base station 18-1) requires location registration from the mobile phone 20 in the zone A, the zone number of the zone A is indicated by a solid line A ₁ to a dotted line A _1.
By switching to _2, the cellular phone 2 in the zone A
As in the case of moving from zone A to zone B shown in FIG. 2, the change in zone number is detected and position registration is triggered.

When the network side performs zone switching only for a specific zone and simultaneous zone switching for all zones in the system, it is necessary that the zone numbers assigned to each zone in the system do not overlap. The zone number assigned to each zone does not need to have regularity, but having regularity simplifies control and management on the network side.

FIG. 3 is a zone number configuration diagram showing an example of giving regularity to zone numbers. In this way, the fixed part for each zone is common to all zone numbers assigned to that zone, and by changing the modulo part,
Assign multiple zone numbers.

FIG. 4 shows an example of the processing flow on the network side in this embodiment. When changing the modulo part in this way, it is first determined whether the request type is "simultaneous", "specific zone" or "specific mobile phone" (S100). Then, in the case of simultaneous broadcast, the modulo values of all base stations 18-1 to 18-n in the system are changed (S1
02) In the case of a specific zone, the base station 18-1
The modulo value of the target base station 18 among 18 to 18-n is changed (S104). Further, if it is a specific mobile phone, the final location registration zone of the mobile phone 20 is extracted (S10
6) Change the modulo value of the base station 18 in the target location registration zone (S108).

As described above, according to this embodiment, the position registration, which is the initiative of the mobile phone 20, can be controlled from the network side by switching the zone number, and one base station can be made to appear as a plurality of different base stations. . Therefore, when the location registration information on the rope side is lost, it is possible to promptly restore the information and confirm the location, etc. by using the standard protocol including multi-vendorization.

Note that the term "zone number" in this specification is a generic term for numbers that are periodically notified from the network (radio base station 18) to the mobile phone 20 and the mobile phone 20 determines the necessity of relocation registration. And

[0022]

As described above, according to the present invention, by switching the zone number, the network side controls the induction of location registration of the mobile phones in the zone, including the mobile phones that do not support the unique protocol in the system. If the location registration information on the network side is lost, the information can be quickly restored.

Further, when the mobile telephone moves out of the zone, the fact that it has moved out of the zone is not notified to the network side, so information on the network side remains, but by periodically switching the zone number, It is also possible to confirm whether each mobile phone registered in each zone remains in the zone (confirmation of presence).

Further, since the location registration is induced in the mobile telephone only when the network side needs the location registration information, the power consumption of the mobile telephone can be reduced as compared with the method of inducing the location registration periodically.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of zone number switching in a single zone showing an embodiment of a zone number switching system in a mobile communication system according to the present invention.

FIG. 2 is an explanatory diagram of zone number switching showing an embodiment of a zone number switching system in a mobile communication system according to the present invention.

FIG. 3 is a configuration diagram of zone numbers in the present embodiment.

FIG. 4 is a flowchart showing an example of a network-side processing flow in this embodiment.

[Explanation of symbols]

 10 telephone circuit (TSW) 12 central processing unit (CPU) 14 main memory (MEM) 16-1 to 16-n wireless control circuit (FIU) 18-1 to 18-n wireless base station (BS) 20 mobile phone ( PS)

Claims (2)

[Claims] 1. When a mobile station moves to a zone of a different radio base station, the mobile station stores the zone number assigned to the radio base station and registers the location thereof.
In a zone number switching method in a mobile communication system that enables communication in a plurality of zones, the wireless base station is assigned a plurality of zone numbers for a single zone, and the wireless base station is switched by switching the zone numbers. A zone number switching method in a mobile communication system, wherein location registration is induced for the mobile station in the zone. 2. The zone number switching method according to claim 1, wherein the zone number switching is performed on the network side including the wireless base station, and each zone number is a number that does not overlap with other zone numbers. Zone number switching method in mobile communication systems.