JPH0851661A - Mobile radio communication system - Google Patents

Abstract

PURPOSE:To prevent incoming call impossibility generated by the area movement change of a mobile radio terminal and the ON and OFF of a power source at the time of mobile communication position registration. CONSTITUTION:In this mobile radio communication system, a service area by plural base stations is divided into plural position registration areas A and B, position registration codes LA and LB respectively allocated to them beforehand are reported from the base station 6 to the mobile radio terminal 7, the reported position registration code is compared with the position registration code stored by the mobile radio terminal 7 beforehand and the position registration code of the position registration area where the mobile radio terminal 7 is present is stored in a home memory on a network side based on the result. When a compared result is different and the mobile radio terminal 7 requests position registration to the base station 6, the position registration code for which the position registration is received and the position registration code for which the position registration is requested are separately stored in the nonvolatile memory of the mobile radio terminal 7 and a position registration operation is restarted when the position registration code reported by the base station and the position registration code for which the position registration is requested do not match.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a plurality of fixed base stations,
The present invention relates to a mobile radio communication system having a plurality of mobile radio terminals that perform radio communication with the fixed base station, and in particular, a movement for confirming the position of the mobile radio terminal within a service area by the plurality of fixed base stations. When registering the communication position, the area of the mobile wireless terminal is changed and the power is turned on.
The present invention relates to a mobile radio communication system capable of preventing an incoming call failure caused by turning off.

[0002]

2. Description of the Related Art Generally, there is known a mobile radio communication system having a plurality of fixed base stations and a plurality of mobile radio terminals for performing radio communication with the fixed base stations. In the mobile radio communication system, since the mobile radio terminals move, the processing for each mobile radio terminal is changed according to the movement, not the fixed base station fixed, and route selection and determination of the charging index are performed. , The position of the mobile wireless terminal must be constantly tracked and registered by the control station, etc. on the higher side of the fixed base station (hereinafter referred to as the network side) for services such as matching of the incoming call area to the mobile wireless terminal. There is. This is generally called location registration of a mobile radio terminal, and a unit of area managed by the network as location information is called a location registration area. Normally, the location registration area of each mobile radio terminal is registered in the home memory provided in a specific switching center on the network side, and the call from the network side at the time of an incoming call is the entire movement within the location registration area. A plurality of wireless base stations call the wireless terminal all at once.

FIG. 15 is an explanatory diagram showing an example of an area for general mobile communication location registration. In FIG. 15, A,
B is a location registration area, where location registration code LA,
LB is assigned. The location registration area is further divided into a large number of base station zones Z, and a fixed base station is installed in the center thereof, and C indicates an area boundary. The position registration codes L assigned to the mobile radio terminals in the position registration areas A and B are respectively assigned by the fixed base stations respectively arranged.
A and LB are notified as notification signals. The mobile radio terminal compares the location registration code LA or LB notified from the fixed base station with the location registration code stored in the mobile radio terminal, and when the mobile radio terminal moves into another location registration area. When the compared position registration codes are different, the position registration code notified from the fixed base station of the movement destination is stored in its own memory based on a predetermined sequence. In this way, the location where the mobile wireless terminal is located,
The position registration code (position registration area information) on the home memory is always matched.

Next, the conventional mobile communication location registration operation will be described in more detail. FIG. 16 is a sequence diagram of a basic operation when the location registration code is different in the mobile communication location registration operation. As shown in step 1 of FIG. 16, when the location registration code notified from the base station and the location registration code stored in the mobile radio terminal are different, the mobile radio terminal is moved to the destination base station. In contrast,
Send a "location registration request" message. Next, in step 2, the base station receiving the message sends an “authentication request” to the mobile radio terminal, and in step 3, the mobile radio terminal sends an “authentication response” to the base station for a response. send. Next, in step 4,
When the authentication can be confirmed by the authentication response sent from the mobile wireless terminal, the base station sends "location registration acceptance" to the mobile wireless terminal and also registers the new location registration code in the home memory on the network side. . Here, the mobile radio terminal receiving the "location registration acceptance" confirms that a new location registration code is registered on the network side, and stores the new location registration code in the non-volatile memory.
Update memory. If the base station does not accept the location registration because the communication channel is not available, that is, if the authentication cannot be confirmed, in step 5, the base station moves the "location registration refusal" message to the mobile terminal. The mobile wireless terminal which has sent the wireless terminal and received the wireless terminal does not update the memory. Further, when neither "location registration acceptance" nor "location registration refusal" is returned from the base station within a predetermined time after sending the "location registration request" in step 1, the mobile radio terminal Clears the non-volatile memory as location registration failure.

Now, when the mobile radio terminal moves from the area A to the area B as shown in FIG. 15, the notified position registration code is different from the stored position registration code. Start the registration operation. On the other hand, in recent years, this type of mobile wireless terminal has a system in which the power is repeatedly turned on and off at a predetermined timing in order to reduce consumption of battery power.
Here, if the mobile radio terminal immediately turns off the power of the mobile radio terminal after sending the "authentication response", the "location registration acceptance" cannot be received. Further, if the power supply is turned off after the mobile radio terminal receives the "location registration acceptance" and before the non-volatile memory is updated, the non-volatile memory of the mobile radio terminal is not updated. In either case, the above mobile radio terminal has the original location registration code LA.
Will be remembered. Further, the base station side transmits "location registration acceptance" regardless of the state of the mobile radio terminal side, and updates the location registration code of the home memory to LB.
As a result, a discrepancy occurs between the location registration code stored in the nonvolatile memory of the mobile radio terminal and the location registration code stored in the home memory of the base station. here,
When the power of the mobile-less terminal is turned on again, the location registration code LB notified from the base station is different from the memory code LA of the mobile radio terminal, so the mobile communication location registration processing is performed again, Disagreement is resolved.

However, here, after the mobile radio terminal moves from area A to area B and the mobile communication location registration process is started, the power of the mobile radio terminal is turned off. When returning and turning on the power there, the location registration code notified from the base station becomes LA, which is the same as the location registration code LA stored in the mobile radio terminal, so that the mobile communication location registration processing is performed. Absent. When an incoming call is made to the mobile radio terminal in such a state, since the home memory of the network side of the base station has been updated to the location registration code LB, the mobile radio terminal is in the area B. "Call" is made to the area B based on the misunderstanding that the call signal is different from the call signal to the area A in which the mobile radio terminal is located.
"Call" is not valid. Therefore, there has been a serious problem that an incoming call cannot be made even though the mobile wireless terminal is powered on.

[0007]

The present invention has been made in view of the above circumstances, and when registering a mobile communication position for confirming the position of a mobile wireless terminal within a service area by a plurality of fixed base stations, an area of the mobile wireless terminal is provided. Movement change and power supply O
An object of the present invention is to provide a mobile radio communication system capable of preventing an incoming call failure caused by N and OFF.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention includes a plurality of fixed base stations and a mobile radio terminal that performs wireless communication with the fixed base stations, and each of the plurality of base stations serves a service area. The location registration area is set to each of the plurality of location registration areas, and the location registration code previously assigned to each of the plurality of location registration areas is notified from the base station to the mobile wireless terminal, and the mobile wireless terminal is notified from the base station. The location registration code is compared with the location registration code stored in advance, and based on the comparison result, the location registration code of the location registration area in which the mobile radio terminal exists is stored in the home memory on the network side. In the mobile radio communication system described above, when the comparison result is different and the mobile radio terminal makes a location registration request to the base station, the location registration accepted by the location registration is performed. And over de, characterized in that the manner to store the location registration code that requested the position registration in the non-volatile memory separately the mobile radio terminal. Further, when the location registration code notified by the base station and the location registration code requesting the location registration do not match, the location registration operation is restarted.

[0009] Further, it includes a plurality of fixed base stations and a mobile radio terminal for performing wireless communication between the fixed base stations, and a location registration area is set for each service area of the plurality of base stations. The location registration code previously assigned to each of the location registration areas is notified from the base station to the mobile radio terminal, and the mobile radio terminal stores in advance the location registration code notified from the base station. In the mobile radio communication system, the location registration code is compared with the location registration code, and the location registration code of the location registration area in which the mobile radio terminal exists is stored in the home memory on the network side based on the comparison result. The feature is that the power is not turned off until the processing is completed.

[0010]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is an overall configuration diagram of an embodiment of a mobile radio communication system according to the present invention. As shown in Figure 1,
In this mobile radio communication system, as shown in FIG. 15, the location registration areas A, B, ...
.., divided into position registration areas A, B, ...
Are further subdivided into zones Z, and the base stations 6 are installed individually. Now, when the mobile radio terminals 7 in the location registration areas A and B are powered on, the mobile radio terminals 7 perform location registration and call origination after the perch channel scanning operation and the standby channel selection processing. It is connected to the channel of the base station to which it belongs, and is registered in the home memory on the network side of the base station 6 (not shown).

FIG. 2 is an internal configuration diagram of the mobile radio terminal 7, and the mobile radio terminal 7 shown in this example includes a radio section 8 and
It has a control unit 9 connected to the wireless unit 8.

The radio section 8 further includes a transmitting section 11 connected to the transmitting antenna 10, a receiving antenna 12 and a receiving section 13 connected to the transmitting section 11, and a synthesizer 14 connected to the receiving section 13. Have In addition, the control unit 9 controls the control processing unit 1 connected to the transmission unit 11.
5, a demodulation unit 16 connected to the control processing unit 15 and the receiving unit 13, a wireless control unit 17 connected to the control processing unit 15 and the synthesizer 14, and a CPU 18 connected to the control processing unit 15. , VSELP 19 connected to the control processing unit 15, an audio processing unit 20 connected to the VSELP 19, a RAM 21 connected to the control processing unit 15, and a ROM (nonvolatile) connected to the control processing unit 15. Memory) 22 and the control processing unit 15
And a LCD 24 connected to the control processing unit 15. As shown in FIG. 3, the ROM (nonvolatile memory) 22 is a request memory for storing the location registration code received when the mobile radio terminal 7 sends a location registration request to the base station 6. 25 and a position memory 26 for storing a new position registration code when the mobile wireless terminal 7 receives a position registration acceptance, and the RAM 21 holds the received position registration code. It is a thing.

Next, the mobile communication position registration operation by the plurality of fixed base stations 6 in the mobile radio communication system having the above configuration will be described with reference to FIGS. Since the basic operation of this mobile communication location registration is the same as that shown in FIG. 16, refer also to FIG. First, as shown in FIG. 4, when the mobile radio terminal 7 is registered in the location registration area A shown in FIG. 1, the location registration code LA is stored in the home memory on the network side of the base station 6. The position registration code LA is stored in each of the position memory 26, the request memory 25, and the RAM 21 of the mobile wireless terminal 7.

Next, as shown in FIG. 5, when the mobile radio terminal 7 moves from the location registration area A to the location registration area B, the location registration code LB notified by the base station 6 by the mobile radio terminal 7. Is received and written in the RAM 21. Therefore, the position registration code LA stored in the position memory 26 and the position registration code LB stored in the RAM 21 do not match. When the contents of the position memory 26 and the RAM 21 do not match, a position registration request is sent from the mobile radio terminal 7 to the base station 6 as shown in FIG. 6 (see step 1 in FIG. 16). At the same time, according to the present invention, the RAM is stored in the request memory 25.
21 is stored, that is, the location registration code L
B is written. As a result, the fact that the location registration request is made in the area B on the mobile radio terminal 7 side is stored.

Next, an authentication request is sent from the base station 6 to the mobile radio terminal 7 (step 2 in FIG. 16), and in response thereto, an authentication response is sent from the mobile radio terminal 7 to the base station 6. When the authentication is confirmed (step 3 in FIG. 16), the location registration acceptance is sent from the base station 6 to the mobile radio terminal 7 as shown in FIG. 7 (step 4 in FIG. 16), and the base station is transmitted. 6, the home memory on the network side is updated to the location registration code LB, and at the same time, the mobile radio terminal 7
The position registration acceptance is received by, the contents of the position memory 26 are updated to the position registration code LB, and the position registration operation is completed.

Here, as shown in FIG. 8 and FIG. 9, when the mobile radio terminal 7 is moved from the area B to the area A while the power is still on, the mobile radio terminal 7 is moved from the area A to the area B. The same position registration operation is performed in the memory state opposite to the case.

However, if the mobile radio terminal 7 is powered off before the location registration acceptance is received by the mobile radio terminal 7 from the base station 6 shown in FIG.
As shown in 0, the contents of the position memory 26 are not updated and remain the position registration code LA, and the request memory 2
The content of 5 is the position registration code LB, but the RAM 2
The contents of 1 are cleared because the power is off, and at the same time, the contents of the home memory are updated to the position registration code LB.

Next, as shown in FIG. 11, when the mobile radio terminal 7 moves from the area B to the area A while the power supply shown in FIG. 10 remains off, the power supply is turned off. It doesn't work at all and the memory contents are unchanged. On the other hand, the contents of the position memory 26 become the position registration code LA and the contents of the memory 25 become the position registration code LB, but the contents of the RAM 21 are cleared. here,
As shown in FIG. 12, when the power of the mobile wireless terminal 7 is turned on, the position registration code LA notified from the base station 6 is written in the RAM 21. In this state, the position memory 26 is stored. Although the contents of 1 and the contents of the RAM 21 match, the contents of the request memory 25 and the contents of the RAM 21 do not match. Therefore, as described above, the normal calling operation in the area B becomes impossible.

Therefore, in the present invention, the request memory 25 is provided.
And the contents of the RAM 21 do not match, it is determined that there is a difference between the contents of the home memory (in this case, the position registration code LB) and the contents of the position memory 26 (in this case, the position registration code LA). As shown in FIG. 13, the mobile radio terminal 7 again sends a location registration request to the base station 6. By this processing, the position registration code LA stored in the RAM 21 is written in the request memory 25.

Next, the base station 6 issues an authentication request to the mobile radio terminal 7 (step 2 in FIG. 16), and in response thereto, the mobile radio terminal 7 sends an authentication response to the base station 6. When the authentication is confirmed (step 3 in FIG. 16), the location registration acceptance is sent from the base station 6 to the mobile wireless terminal 7 as shown in FIG. 14 (step 4 in FIG. 16).
The home memory on the network side of the base station 6 is the location registration code L.
Updated to A. At the same time, the location registration acceptance is received by the mobile wireless terminal 7, and the location memory 2
The content of 6 is updated to the location registration code LA, and the location registration operation is completed.

As described above, the contents of the RAM 21 and the request memory 25 are compared with each other to determine whether the contents of the home memory and the position memory 26 do not match, and a position registration request is made again in accordance with the result of the judgment. Therefore, it is possible to solve the problem that the reception processing cannot be performed even though the power supply of the mobile wireless terminal is turned on as described in the related art. In addition,
In the above-described embodiment, the contents of the RAM 21 and the request memory 25 are compared to determine the mismatch between the contents of the home memory and the position memory 26. However, as a modification, the contents of the position memory 26 and the request memory 25 are compared and Position memory 2
It is also possible to judge the disagreement of the contents of 6. Also, as a second embodiment, the power switch of the mobile radio terminal is a software switch, and even if the power off switch is pressed during the position registration process or the power supply voltage drops, the position registration process is completed. May be configured not to turn off the power. In this case, the same effect as that of the first embodiment can be obtained.

[0022]

As described above, the contents of the RAM and the request memory are compared with each other to determine whether the contents of the home memory and the position memory do not match, and a position registration request is made to match them according to the result of the judgment. Therefore, it is effective in solving the problem that reception processing becomes impossible even though the power supply of the mobile wireless terminal is turned on as described in the related art.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a mobile radio communication system according to the present invention.

FIG. 2 is an internal configuration diagram of the mobile terminal without a mobile terminal shown in FIG.

FIG. 3 is an explanatory diagram showing a memory configuration of the mobile radio terminal shown in FIG.

4 is an operation explanatory diagram of a location registration operation of a mobile radio terminal in the mobile radio communication system shown in FIG.

5 is an operation explanatory diagram of a location registration operation of a mobile radio terminal in the mobile radio communication system shown in FIG.

6 is an operation explanatory diagram of a position registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

7 is an operation explanatory diagram of a location registration operation of a mobile radio terminal in the mobile radio communication system shown in FIG.

8 is an operation explanatory diagram of a location registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

9 is an operation explanatory diagram of a location registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

10 is an operation explanatory diagram of a position registration operation of the mobile wireless terminal in the mobile wireless communication system shown in FIG.

11 is an operation explanatory diagram of a location registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

12 is an operation explanatory diagram of a position registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

13 is an operation explanatory diagram of a location registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

FIG. 14 is an operation explanatory diagram of a location registration operation of a mobile wireless terminal in the mobile wireless communication system shown in FIG.

FIG. 15 is an explanatory diagram showing an example of an area at the time of mobile communication location registration of a general mobile radio communication system.

FIG. 16 is a sequence diagram of a basic operation of mobile communication position registration in a general mobile radio system.

[Explanation of symbols]

1 to 5 ... Each step, 6 ... Base station, 7 ... Mobile radio terminal, 8 ... Radio unit, 9 ... Control unit, 10
… Transmitting antenna, 11… Transmitting part,
12 ... Receiving antenna, 13 ... Receiving part,
14 ... Synthesizer, 15 ... Control processing part, 16 ... Demodulation part, 17 ... Wireless control part, 18 ... CPU, 19 ...
VSELP, 20 ... Voice processing unit, 21 ... RAM, 22 ...
ROM, 23 ... PROM, 2
4 ... LCD, 25 ... request memory,
26 ... position memory,

Claims (3)

[Claims] 1. A plurality of fixed base stations, and a mobile wireless terminal that performs wireless communication with the fixed base stations, wherein a location registration area is set for each service area of the plurality of base stations. The location registration code previously assigned to each of the location registration areas is notified from the base station to the mobile radio terminal, and the mobile radio terminal stores in advance the location registration code notified from the base station. In the mobile radio communication system, which compares the location registration code and stores the location registration code of the location registration area where the mobile radio terminal exists in the home memory on the network side based on the comparison result, Differently, when the mobile radio terminal makes a location registration request to the base station, the location registration code accepted for the location registration and the location registration requesting the location registration. A mobile radio communication system characterized in that the code and the code are separately stored in the non-volatile memory of the mobile radio terminal. 2. The mobile radio according to claim 1, wherein the location registration operation is restarted when the location registration code notified by the base station and the location registration code requesting the location registration do not match. Communications system. 3. A plurality of fixed base stations and a mobile wireless terminal that performs wireless communication with the fixed base stations, wherein each of the plurality of base stations sets a location registration area for each service area, and the plurality of fixed base stations are set. The location registration code previously assigned to each of the location registration areas is notified from the base station to the mobile radio terminal, and the mobile radio terminal stores in advance the location registration code notified from the base station. In the mobile radio communication system, the location registration code is compared with the location registration code, and the location registration code of the location registration area in which the mobile radio terminal exists is stored in the home memory on the network side based on the comparison result. A mobile radio communication system characterized in that power is not turned off until processing is completed.