JP3056095B2 - Mobile station registration method for mobile radio telephone system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station registration system for a mobile radio telephone system, and more particularly, to registration and maintenance of a mobile station when a failure occurs in a base station apparatus.

[0002]

2. Description of the Related Art In a cellular mobile radio telephone system, as is well known, a base station needs to register the position of a mobile station in its own radio zone.
In the method in which the mobile station performs the initial operation of registration, the mobile station transmits its own ID to the base station and automatically registers based on a control signal including the ID of the base station transmitted periodically from the base station. It is carried out.

[0003] Therefore, when a mobile station moves from one radio zone to another radio zone when the power of the mobile station is turned on, the mobile station moves out of the service area (meaning that the mobile station is not in any radio zone). In addition, the location registration is performed when the mobile station enters the network. In addition to this, re-registration is performed also when a failure occurs in the base station apparatus and communication of the control signal is interrupted. The location registration is performed by exchanging control signals between the mobile station and the base station as described above, but the problem here is that the location registration is first caused by frequent movements of the mobile station or radio wave interference. Is frequently performed, and secondly, when a fault occurs in the base station apparatus and the fault is recovered, a large number of mobile stations in the wireless zone of the base station simultaneously make a position registration request to the same base station. Is transmitted.

That is, in the first case, the connection time is prolonged due to frequent useless location registrations. In the second case, a large number of mobile stations in the wireless zone are simultaneously operated. The connection time is prolonged due to an increase in the traffic of the control signal due to the transmission of the location registration request.
One of the means for solving the first problem is disclosed in, for example,
There is a prior art disclosed in Japanese Patent No. 79472, “Location registration method for wireless telephone device”.

In this prior art, a location registration determination level changing unit is provided in addition to the location registration determination level monitoring unit, and a mobile station that receives a control signal transmitted from a base station receives the control signal transmitted from the base station at a predetermined level. It is determined whether the above is the case, and a position registration request signal is transmitted.If the received electric field strength fluctuates due to frequent movements of mobile stations or obstacles, etc., and the position registration request is frequently made, , The determination level when transmitting the registration request signal is changed. Specifically, the number of times of transmitting the location registration request is reduced by setting the determination level to a high level.
Therefore, unnecessary communication of control signals between the mobile station and the base station can be eliminated, and the connection time can be reduced.

[0006]

In the mobile station registration system of the mobile radio telephone system shown in the prior art as described above, the first problem is to reduce unnecessary position registration requests due to fluctuations in received electric field strength. However, the second problem, that is, the failure of the base station apparatus, causes an increase in the traffic of the control signal when a large number of mobile stations in the wireless zone of the base station simultaneously transmit a location registration request. It cannot be prevented, and it takes time to complete registration of all mobile stations. In addition, since the control channel is occupied for a long time, there is a problem that a call on the control channel performed when all the communication channels are in use cannot be performed until registration of all mobile stations is completed.

The present invention has been made to solve such a problem, and can prevent an increase in traffic of a control signal generated at the time of re-registration due to a failure of a base station device, and can efficiently use a frequency. It is an object of the present invention to provide a mobile station registration system for a mobile radio telephone system.

[0008]

According to a mobile station registration system of a mobile radio telephone system according to the present invention, when a location registration request is transmitted to a mobile station to a base station, the location registration request is activated by the mobile station. The first means for determining whether or not to perform at power-on, the base station ID (identification code) included in the control signal from the base station received when not to perform at startup power-on is already stored. A second means for determining whether or not the ID matches the base station ID;
A third means for not transmitting the location registration request when D is coincident is provided, and a failure occurs in the base station in which a control signal cannot be communicated with the mobile station. Means for maintaining the location registration of the mobile station before the occurrence of the fault when the mobile station returns.

Also, a timer is provided in the base station, and a failure occurs in which control signals cannot be exchanged with the mobile station, and only when the failure returns within a predetermined time measured by the timer. Means for maintaining location registration of the mobile station before the occurrence of the failure.

The mobile station registration system of the mobile radio telephone system according to the present invention has the above-described configuration, and is provided with a control signal based on a location registration request from each mobile station which is performed at the same time when a base station fault is recovered. For a long time can be eliminated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram schematically illustrating a device configuration of a mobile station and a base station for explaining an embodiment of the present invention. In the figure, 1 indicates the entire mobile station,
10 is a transmitting means for inputting the voice of the user and transmitting it to the other party, 11 is a receiving means for receiving the voice from the other party, 12 is a voice interface for adjusting the input / output gain of the voice signal, and 13 is a user interface. Operation means for performing dial input and on-hook and off-hook operations for performing wireless communication; display means 14 including LEDs and LCDs for displaying information such as dial numbers and dates;
15 is a wireless communication means for transmitting and receiving control signals and communication signals to and from the base station, 16 is an antenna for transmitting and receiving radio waves to and from the base station, and 17 is an identification code of the base station (hereinafter I
D) on the base station, and a base station ID storing means for storing the base station ID at the time of reception in order to check whether the base station ID is the same. Sometimes a mobile station ID storage means for storing a mobile station ID to check whether the mobile station IDs are the same, a location registration request means 19 for making a location registration request to the base station, and a control 20 for controlling the entire mobile station apparatus Means.

Reference numeral 2 denotes the entire base station, 21 is an antenna for transmitting and receiving radio waves to and from each mobile station, 22 is a radio communication means for transmitting and receiving control signals and communication signals to and from each mobile station, and 23 is a base station. Control means for controlling the entire apparatus, 24 is a position registration memory for registering the position of the mobile station, 25 is a backup memory for backing up the contents of the position registration memory, and 26 is a timer.

Next, the operation of this embodiment when a failure occurs in the base station apparatus will be described. FIG. 2 is a flowchart showing the operation in the base station in this case, and FIG. 3 is a flowchart showing the operation in the mobile station in the same manner. First, in the base station 2, if a failure occurs such that the control signal cannot be communicated with each mobile station in step S 200, the base station 2 cannot communicate the control signal. Since the location registration which has been performed is deleted, the location registration is performed again in the conventional mobile station registration method. However, in the present embodiment, the contents of the location registration memory 24 are backed up by the backup memory 25. In step S201, the control unit 23
Detects that a failure has occurred, in step S202
6 is operated, and the time until this fault is recovered is measured.

If the fault is recovered within a predetermined time (immediately) in step S203, the contents of the backup memory 25 are moved to the position registration memory 24, a control signal is transmitted, and each registered movement is performed. Communication of a control signal with the station 1 is started. If the failure does not return within the predetermined time in step S203, the operation in step S204 is not performed, and the newly registered position registration is sequentially registered in the position registration memory 24. Become. In other words, if the fault recovers immediately, it is considered that most of the mobile stations have not moved, and there is no problem if the location registration is returned to the state before the fault occurred, but if it takes time to recover from the fault, It is conceivable that many mobile stations perform location registration with another base station during the occurrence of a failure, and the failure recovery time is determined in order to avoid double registration in this case.

As is well known, the location registration requesting means 19 of the mobile station 1, when moving from the wireless zone of a certain base station to the wireless zone of another base station at the time of starting power supply of the mobile station, moves from outside the service area to the wireless zone. In addition to the case where the mobile station has entered, the location registration request is also output when the communication of the control signal is interrupted due to the failure of the base station as described above. 20 determines whether this position registration request is a registration request at the time of starting power-on, and if it is a registration request at the time of starting power-on, as in the conventional method, the mobile station 1 in step S302. Transmits a registration request signal to the base station 2 to start the location registration operation. Then, when the location registration is completed in step S303, the system enters a call waiting state in step S305.

If it is determined in step S301 that the request is not a registration request when the power is turned on, the process proceeds to step S304, where the base station ID included in the received control signal is the base station ID.
It is determined whether or not the ID matches the base station ID stored in the storage unit 17. If the ID does not match due to the movement of the mobile station 1 or the like, steps S302 and S302 are performed in order to newly register with another base station. Move to S303. On the other hand, step S30
If the base station IDs match at 4, no registration request signal is transmitted, and the process immediately enters the incoming call waiting state at step S 305. That is, even if a failure occurs in the base station 2 and communication of the control signal is interrupted, if the failure immediately recovers,
The base station 2 maintains the location registration before the occurrence of the failure. If the IDs in the control signals match, there is no need to re-register the location registration. In such a case, registration delay and communication delay due to an increase in traffic of the control signal are prevented.

In the case where the received electric field strength fluctuates, the mobile station 1 does not issue a registration request when the starting power is turned on.
Since the base station ID also matches, no registration request signal is transmitted,
Also, since the base station 2 maintains the position registration as it is as a short-time radio wave obstruction, the re-registration operation is not performed, and useless use of a control signal in this case can be eliminated.

The location registration memory 24, the backup memory 25, and the timer 26 shown in FIG. 1 are, of course, an embodiment. When a failure occurs, the location registration before the failure is maintained for a short time. If it is a means,
Any configuration may be used.

[0019]

As described above, the mobile station registration system of the mobile radio telephone system according to the present invention has the above-described configuration, so that efficient mobile station registration can be performed and a base station failure can be restored. This eliminates the long-term occupation of the control signal by the location registration request of each mobile station, which has been performed simultaneously, thereby reducing the traffic of the control signal and shortening the connection time.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically illustrating a device configuration of a mobile station and a base station for explaining an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of a base station according to the present embodiment.

FIG. 3 is a flowchart illustrating an operation of a mobile station according to the present embodiment.

[Explanation of symbols]

 Reference Signs List 1 mobile station 2 base station 10 transmitting means 11 receiving means 12 voice interface 13 operating means 14 display means 15, 22 wireless communication means 16, 21 antenna 17 base station ID storage means 18 mobile station ID storage means 19 position registration request means 20 , 23 control means 24 position registration memory 25 backup memory 26 timer

Claims (1)

(57) [Claims] 1. A mobile station registration system for a mobile radio telephone system in which a plurality of mobile stations located in a wireless zone of the base station are registered in the base station, wherein a position registration request is transmitted to the base station. First means for determining whether or not this location registration request is to be made when the mobile station is turned on, and included in a control signal from the base station received when the location registration request is not made when the startup power is turned on. Base station ID (identification code)
A second means for determining whether the base station ID matches the already stored base station ID. If the base station ID matches in the second means, this location registration request is not transmitted. the third comprises means, to the base station, a timer is provided, disorder communication can not be performed in the control signal of the mobile station is generated, pre this failure is measured by the timer
A mobile station registration system for a mobile radio telephone system, comprising means for maintaining location registration of the mobile station before the occurrence of the failure only when the mobile station returns within a predetermined time .