JPH11261472A - Position registration control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid dissidence between mobile station position information registered to a control station and a current position of a mobile station by allowing a mobile station whose position information is updated and all mobile stations to send a position registration signal again on the occurrence of a fault in a control station or a connection channel between the control station and base station. SOLUTION: A fault monitor control section 111 of a radio base station 1 detects occurrence of a fault when interruption of periodic communication between the radio base station 1 and a control station 3 takes place, and a faulty state information transmission section 118 sends fault notice information. A mobile station receives the information and requests position registration to the radio base station 1 to update mobile position information registered in the control station 3. On the other hand, the radio base station 1 detecting the restoration from the fault uses a fault recovery information transmission section 114 to send restoration information to the mobile station, the mobile station sends the position registration request to the radio base station 1 again. The radio base station 1 receives the both and sends them to the control station 3 to update the position information, and the mobile station receives the registration reception signal via the radio base station 1 to make the registration complete. Then the registration information in the control station 3 and the actual position of the mobile station are coincident.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a location registration control method for a mobile station in a mobile communication system. A mobile communication system is composed of a control station equipped with a command table for performing communication commands and a function of performing wireless channel assignment control of a wireless base station, a plurality of wireless base stations connected to the control station via a wired or wireless line, and a plurality of wireless base stations. The mobile station forms a communication service area for performing wireless communication between the control station and the mobile station or between the mobile station and the mobile station via the wireless base station.

[0002] In such a mobile communication system, each mobile station must be located in the base zone when the mobile station shifts between base zones, shifts from outside the base zone to the base zone, or is powered on in the base zone. By transmitting a location registration request signal notifying that the base station is constantly updating the location registration information of the base zone managed by the control station. Although line allocation control is performed, location registration cannot be performed if a failure occurs in the control station or a failure occurs in the line between the control station and the radio base station.

[0003]

2. Description of the Related Art FIG. 12 shows a block configuration of a mobile communication system. In the figure, 80 is a control station, 81 is a wireless base station, 8
Reference numeral 2 denotes a mobile station such as a mobile phone.

[0004] The control station 80 manages the assignment of radio lines and the mobile stations in the base zone, and a service area (base station) in which a plurality of radio base stations 81 connected to the control station 80 by wire or radio line perform radio communication. A mobile station 82 in each base zone communicates with another mobile station or a command table or telephone in another mobile station via the wireless base station 81 or the wireless base station 81 and the control station 80. Perform communication.

[0005] The control station 80 is connected to the mobile station 82 or the command console 8.
0b, a home location register 80c (hereinafter, HLR) that manages the location information of the mobile station when there is a call request from the mobile station.
To check the location registration information of the called mobile station.
An optimal wireless base station is selected and wireless channel allocation is controlled. The HLR 80c does not confirm the position information, and allocates a wireless line to all the wireless base stations connected to the control station 80. After the allocation, the wireless signal of the unnecessary wireless base station 81 is transmitted by a response signal from the destination mobile station. Although it is possible to disconnect the line, a wireless line is also temporarily allocated to a wireless base station that is not a communication target, resulting in connection delay and waste of the wireless line. Also, in the case of group communication with a plurality of mobile stations, the method of obtaining responses from a plurality of mobile stations causes further connection delay and waste of the radio line. Management and control for selecting the wireless base station based on the location registration information and allocating a wireless line are required.

FIG. 13 shows a configuration of a conventional control station, radio base station, and mobile station, and FIG. 14 shows a location registration control sequence. In FIG. 13, reference numerals 80 to 82 correspond to the same reference numerals as in FIG. 800 in the control station 80 is a base station interface unit, 801 is a command console, 802 is a line control unit, and 803 is a mobile station location registration information management unit (HLR). In the radio base station 81, 810 is a main control unit, 811 is a modulation unit, 812 is a transmission unit, 813 is an antenna shared unit, 81
4 is a receiving unit, 815 is a demodulation unit, 816 is a memory timer unit, 817 is a control station interface unit, 818 is a fault monitoring control unit, and 819 is an alarm display unit. In the mobile station 82, 820 is a control unit, 821 is a modulation unit, 8
22 is a transmitting section, 823 is an antenna shared section, 824 is a receiving section, 825 is a demodulating section, 826 is a memory timer section, 82
Reference numeral 7 denotes a location registration control unit, 827a a power-on (ON) detection unit, 828 denotes a retransmission control unit, and 829 denotes a control program for monitoring a reception level, capturing a control channel, and the like.

The location registration control sequence shown in FIG. 14 will be described. The location registration control in the mobile communication system shown in FIGS. 12 and 13 is performed when the mobile station 82 shifts from one base station zone to another zone. Alternatively, when the mobile station moves from outside the service area to the base station zone or when the power is turned on in the base station zone, the control channel of the wireless base station 81 is captured, and the broadcast information transmitted on the control channel is received. 14A, the location registration control unit 827 of the mobile station 82 transmits a location registration request signal to the wireless base station 81 (b). Upon receiving the position registration request signal, the wireless base station 81 transmits the position registration data of the mobile station to the control station 80 (c in FIG. 14). The control station 80 that has received the location registration data sends an HLR that manages the location information of the mobile station.
The location registration information 803 is updated, and location registration reception data is returned to the wireless base station 81 (FIG. 14).
D). Upon receiving the reception data, the wireless base station 81 transmits a position registration reception signal to the mobile station 82 (e in FIG. 14). The mobile station 82 that has received the position registration acceptance signal completes the position registration.

[0008] Here, if the control station 80 goes down or the connection line between the control station 80 and the radio base station 81 fails (from the control station to the radio base station shown in FIG. 14g). The location registration request signal from the mobile station 82 does not reach the control station 80 and is discarded by the wireless base station 81 (i, k in FIG. 14).
The location registration rejection signal is transmitted from the wireless base station 81 (j, l). The mobile station 82 having received this terminates the position registration control with the position registration failure.

[0009]

As described above, conventionally, when the system of the control station goes down or the connection line between the control station and the radio base station fails, the position registration control ends with the position registration failure. However, there is a problem that the zone of the wireless base station where the mobile station actually exists and the location registration information managed by the control station do not match. Also, when a large number of mobile stations that have received the location registration rejection signal repeatedly resend the location registration request, or when the fault is restored, a location registration request is generated at the same time and the traffic of the radio base station or control station is transmitted. And there is a problem that the possibility that other communication connection requests are obstructed increases.

An object of the present invention is to provide a position registration control method capable of stopping retransmission of an unnecessary position registration request signal during a failure and quickly resolving position information mismatch between a mobile station and a control station. Aim.

[0011]

FIG. 1 shows the principle of the present invention. In the figure, 1 is a radio base station, 2 is a mobile station, and 3 is a control station. 10 in the wireless base station 1 is an information transmitting unit, 10a
Is a failure information transmission unit, 10b is a failure recovery information transmission unit, 1
Reference numeral 0c denotes a failure location registration rejection information sending unit. 11 is a management unit, 11a is a mobile station number designation management unit, 11b is a failure occurrence time management unit, 11c is a failure recovery time management unit, 1
Reference numeral 1d denotes a failure time designation management unit. Reference numeral 12 denotes a memory, and reference numeral 12a denotes a position registration mobile station number. In the mobile station 2, 20 is a location registration unit, 21 is a failure processing unit, 22 is a failure recovery unit, 22a is a failure recovery processing unit, 22b is a transmission activation unit, 22c is a retransmission activation unit, and 22d is a retransmission hold release transmission activation. Reference numeral 22e denotes a failure time designated retransmission activation unit, 22f designates a designated mobile station retransmission activation unit, 23 designates a memory, 23a designates failure registration transmission information, 23b designates transmission hold information, and 23c designates a registration rejection signal. 24 is a time management unit, 24a is a transmission time, 24b is a failure time, and 24c is a recovery time. In the control station 3, reference numeral 30 denotes a failure recovery base station selection unit.

(1) to (7) corresponding to each principle according to the present invention.
Will be described below in order. (1) When the radio base station 1 detects that a failure in the control station 3 or a failure has occurred in the connection line between the control station 3 and the radio base station 1, and then detects that the failure has been restored,
The failure recovery information sending unit 10b for notifying the mobile station 2 of the failure recovery is transmitted. The mobile station 2 has its radio base station 1
When the failure recovery information is received from the base station, a location registration request signal to the base station 1 in the base zone is transmitted to the failure recovery processing unit 2.
2a. Thereby, the position information managed by the control station 3 can be updated to the latest position information.

(2) Upon detecting a failure in the control station 3 or a failure in the connection line between the control station 3 and the wireless base station 1, the wireless base station 1 is in a failure state with respect to the mobile station 2. The failure information transmitting unit 10a transmits the failure notification information to notify the mobile station 2 that the failure has been recovered, and sends the failure recovery notification information for notifying the mobile station 2 of the failure recovery to the failure recovery information. Generated from the unit 10b. When the mobile station 2 receives the failure information from the wireless base station 1 at the time when the mobile station 2 moves between base zones, shifts from outside the zone to the base zone, or turns on the power in the base zone,
At the same time as transmitting the position registration request signal, the failure registration transmission information 23a in the memory 23 indicates that the transmission has failed.
When the failure recovery notification information from the radio base station 1 is received and the failure recovery notification information is stored in the failure registration transmission information 23a, the transmission activation unit 22b
Retransmits the location registration request signal. As a result, retransmission is limited to only the mobile station that has transmitted the location registration request signal during the occurrence of a failure, and an increase in the communication traffic of the wireless line due to all mobile stations retransmitting the location registration request signal at the same time is prevented.

(3) When the mobile station 2 receives the in-fault notification information from the radio base station 1 at the time when the location registration request signal is generated, the mobile station 2 temporarily suspends the transmission of the location registration request signal and simultaneously suspends the transmission. The fact that the temporary suspension of the transmission was in failure is stored in the information 23b. If the failure recovery notification information from the wireless base station 1 is received and the transmission suspension information 23b stores that the transmission during the failure is temporarily suspended, the transmission activation unit 22b transmits the position registration request signal. Start with In this way, during the occurrence of a failure, the transmission of the location registration request signal of the mobile station is temporarily suspended to prevent unnecessary transmission, and when the failure is recovered, the location registration request signal is limited to only the temporarily suspended mobile station. The transmission prevents the communication traffic of the wireless line from rising.

(4) The radio base station 1 detects a fault in the control station 3 or a fault in a connection line between the control station 3 and the radio base station 1, and outputs a location registration request signal from the mobile station 2. Is received, the failed location registration rejection information sending unit 10c returns a failed location registration rejection signal to the mobile station 2 indicating that the location registration request signal cannot be accepted due to the occurrence of a failure, and the failure is recovered. When the failure is detected, the failure recovery information transmitting unit 10b transmits failure recovery notification information to notify the mobile station 2 of the failure recovery.

After transmitting the location registration request signal, the mobile station 2 receives the return of the faulty location registration rejection signal from the radio base station, temporarily suspends the retransmission control of the location registration request signal, and simultaneously suspends the retransmission control. The fact that the suspension was in failure is stored as a registration refusal signal 23c in the memory 23, and when failure recovery notification information is received from the radio base station 1, retransmission control during the failure is temporarily suspended by the registration rejection signal 23c. If this is stored, retransmission of the position registration request signal is activated by the retransmission hold release transmission activation unit 22d. As described above, when a position registration request signal from the mobile station is received during the occurrence of a failure, a position registration rejection signal during the failure is returned, and unnecessary transmission is prevented by temporarily suspending retransmission of the mobile station. In addition, by retransmitting the location registration request signal only to the mobile station that was temporarily suspended at the time of failure recovery,
Prevents an increase in communication traffic on wireless lines.

(5) When a fault occurs, the radio base station 1 manages the time of occurrence by the fault occurrence time management section 11b, adds the fault occurrence time to the transmission information from the faulty information sending section 10a, and sets the fault recovery time. Is stored in the failure recovery time management unit 11c, and the failure recovery notification information is transmitted with the failure recovery time added. Further, when the failure is recovered, the failure time designation management unit 11d adds an arbitrary time period during the failure period when transmitting the failure recovery information, and makes a request to retransmit the position registration request signal in the designated time period. The mobile station receives the in-fault information, and adds the added fault time (fault occurrence time) 2
4b is stored in the time management unit 24 to transmit a prescribed position registration request signal, and the transmission time 24a is stored in the time management unit 24.
To memorize.

When the mobile station 2 recovers from the failure and receives the failure recovery information from the radio base station 1, the mobile station 2 stores the added failure recovery time in the time management unit 24 as the recovery time 24c, and similarly stores the failure recovery notification information. It checks the time of transmission of the location registration request signal of its own station against any time during the failure period added to the location, and if the specified time corresponds to the time of transmission of the location registration request signal, The time-designated retransmission start unit 22e is started to perform retransmission.

Thus, by designating an arbitrary time zone during the failure period and retransmitting the location registration request signal only to the mobile station corresponding to the time zone, the communication traffic of the wireless line after the recovery from the failure is restored. Prevent rise.

(6) When receiving a location registration request signal from a mobile station during a failure, the radio base station 1 records the mobile station number in the location registration mobile station number 12a of the memory 12. When the fault is recovered, the number of the mobile station that transmitted the location registration request signal during the fault is added to the fault recovery information, retrieved from the memory 12, and transmitted to the base zone. When the mobile station 2 receives this, if the designated mobile station number matches the own station number, the designated mobile station retransmission starting unit 22f retransmits the position registration request signal.

As described above, by restricting only the mobile station designated by the radio base station to the retransmission of the position registration request signal, an increase in the communication traffic of the radio line is prevented. (7) The control station 3 sets the failure recovery base station selection unit 3
The wireless base stations are selected one by one from a selection priority table (not shown) of a plurality of wireless base stations connected by 0, and a failure recovery notification is transmitted. The wireless base station 1 receives the failure recovery notification from the control station 3 and transmits the above-described failure recovery notification information (1) to (6) to the mobile station 2 in the base zone. As described above, by sequentially retransmitting the location registration request signal of the mobile station for each radio base station, an increase in communication traffic on the radio channel is prevented.

[0022] The above configuration is used during a failure from a radio base station.
In addition, the mobile station can be configured to independently transmit the position registration request signal using only the notification information of the failure recovery. Further, it is possible to limit the mobile stations transmitted from the wireless base station by notifying the state of the mobile station, the failure time information, and the mobile station number together with the failure recovery information of the wireless base station. Furthermore, it is also possible to configure so that the control station constituting the system selects the radio base station.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 2 and 3 show configurations (part 1) and (part 2) of an embodiment. FIG. 2 shows the radio base station 1 and the control station 3, and FIG. 3 shows the mobile station 2. In the wireless base station 1 of FIG. 2, 100 is a main control unit, 101 is a transmission control unit, 102 is a common control unit, 103 is a reception control unit, 10
4 is a modulation unit, 105 is a transmission unit, 106 is an antenna shared unit,
107 is a receiving unit, and 108 is a demodulation unit. 109 is a memory timer unit. 110, a control station interface unit for interfacing between the radio base station and the control station;
Denotes a fault monitoring control unit, and 112 denotes an alarm display unit. 1
Reference numerals 13 to 120 denote each unit provided according to the present invention.
Reference numeral 13 denotes a location registration mobile station number storage unit for storing the number of a mobile station that has issued a location registration request during a failure, 114 a failure recovery information sending unit, 115 a mobile station number designation management unit, and 116 a failure recovery time management unit. , 117 is a failure time designation management unit, 1
Reference numeral 18 denotes a failure information sending unit, 119 denotes a failure occurrence time management unit, and 120 denotes a failure location registration rejection information sending unit. In FIG. 2, reference numeral 30 denotes a base station interface unit, 31 denotes a command console, 32 denotes a line control unit, 33 denotes a failure recovery base station selecting unit, and 34 denotes an HLR (Home) for managing mobile station position registration information.
LocationResister).

In the mobile station 2 shown in FIG. 3, reference numeral 200 denotes a control unit, 201 denotes a transmission control unit, 202 denotes a common control unit, 203
Denotes a reception control unit, 204 denotes a modulation unit, 205 denotes a transmission unit,.
06 is an antenna shared unit, 207 is a receiving unit, 208 is a demodulation unit, and 209 is a memory timer unit.

Reference numeral 210 denotes a location registration control unit for controlling a location registration request signal, 211 a retransmission control unit, 212 a power-on (ON) detection unit, 213 a transmission time management unit, 214 a fault recovery information processing unit, and 215 A failure information processing unit for storing the location registration transmission during the failure; 216, a failure recovery and retransmission activation unit; 217, a transmission suspension storage control unit; 218, a failure recovery transmission activation unit; 219, a registration rejection signal storage control unit; 220
Is a retransmission hold release transmission activation unit, 221 is a failure time designated retransmission activation unit, 222 is a failure time management unit, 223 is a recovery time management unit, 224 is a designated mobile station retransmission activation unit, 225 is reception level monitoring, control channel acquisition, It is an existing function unit for collation of broadcast information, location registration control, and the like.

2 and 3, the control sequence of the embodiment corresponding to each principle configuration of (1) to (7) in FIG. 1 will be described below with reference to FIGS. 4 to 10. . FIG. 4 shows a first location registration control sequence according to the present invention, and corresponds to the control operation (1) according to the principle configuration of FIG. FIG. 4 shows a mobile station 2, a radio base station 1, and a control station 3.
Are shown over time.

When the regular communication between the radio base station 1 and the control station 3 is interrupted (FIG. 4A), the radio base station 1 detects the occurrence of a fault by the fault monitoring control
8 transmits the failure notification information (b in FIG. 4) including the control channel structure and the position information of the own station at the timing when the call control is not performed. When the mobile station 2 shifts to the base zone or turns on the power in the base zone, the mobile station 2 receives the fault notification information and updates the radio base station information registered in the control station 3 to update the location information of the mobile station. A location registration request signal (c in FIG. 4) is transmitted to the station 1. However, the signal is not transmitted to the control station 3 because of the failure, and the radio base station 1 operates the location registration rejection information sending unit 120 during the failure to operate the registration reject signal (see FIG. 4). Return d). Mobile station 2
When receiving a registration rejection signal, it refers to the rejection reason information in the signal and displays the reason. After that, the location registration request signal c is retransmitted in accordance with a preset threshold value. However, since the registration rejection signal d accompanying the failure is returned, the retransmission is stopped and the location registration fails.

When the periodic communication between the wireless base station 1 and the control station 3 is resumed and the failure recovery is detected, the wireless base station 1 transmits the failure recovery notification information (FIG. 4) by the failure recovery information sending unit 114 (FIG. 2). Send f). Mobile station 2 that received the information
Transmits a position registration request signal (g in FIG. 4) having the same contents as the position registration request signal (c in FIG. 4). Upon receiving this information, the wireless base station 1 executes an operation of transmitting the location registration data to the control station 3 (h in FIG. 4). In response, the position information of the control station 3 is updated to the latest position information. When the location information is updated, the control station 3 transmits the location registration acceptance data to the wireless base station 1 (i in FIG. 4), and transmits a registration acceptance signal (j in FIG. 4) from the wireless base station 1. The mobile station 2 receiving the signal completes the position registration, and the mismatch between the position registration information of the control station 3 and the position of the mobile station 2 is resolved.

It is to be noted that not only the mobile station 1 in which the location registration has failed but also all the mobile stations that have received the failure recovery notification information (f in FIG. 4) can transmit the location information. In the case of transmission, it is possible to sequentially perform location registration processing from the mobile station that has acquired the transmission right. FIG. 5 shows a second location registration control sequence according to the present invention, which corresponds to the control operation (2) according to the principle configuration shown in FIG.

When the periodic communication between the radio base station 1 and the control station 3 is interrupted, the radio base station 1 detects the occurrence of a fault as in the case of FIG. Is transmitted at the timing when the call control is not performed. Mobile station 2
If you switch to the base zone or turn on the power in the base zone,
Upon receiving the above-mentioned in-fault notification information, transmitting a position registration request signal (c in FIG. 5) for recognizing the in-fault and updating the position information of the control station to the radio base station 1, The transmission is stored in the information processing unit during failure 215 (FIG. 3) (S20 in FIG. 5). However, the location registration request signal is not transmitted to the control station 3 because of the failure, and the radio base station 1 sends the failed location registration rejection information sending unit 12.
By the operation of 0, a registration refusal signal (d in FIG. 5) accompanying the failure is returned.

Upon receiving the registration refusal signal (d in FIG. 5), the mobile station 2 refers to the refusal reason information therein and displays the reason. After that, the location registration request signal is retransmitted according to the threshold value of the preset time interval. However, since the registration rejection signal accompanying the failure is returned, the retransmission is stopped and the location registration fails.

When the periodic communication between the wireless base station 1 and the control station 3 is resumed and the failure recovery is detected, the wireless base station 1 drives the failure recovery information sending unit 114 (FIG. 2) to send the failure recovery notification information ( Send f) of FIG. The mobile station 2 that has received the information recognizes the recovery from the failure. At this time, the mobile station 2 recognizes that the location registration request signal has been transmitted during the failure from the contents stored in the failure information processing unit 215 (FIG. 3) (FIG. 5).
S21), the location registration request signal is retransmitted. This is transmitted by the radio base station 1 to the control station 3 so that the control station 3
Is updated to the latest location information. In this way, the mobile station that has made the location registration request during the failure stores this information, so that only the mobile station that has the failure registration request is transmitted at the time of recovery from the failure (mobile station without storage). The station prohibits the transmission of the registration request at the time of restoration of the failure and excludes the transmission of the position registration request), whereby the mismatch between the position registration information of the control station 3 and the position of the mobile station 2 is resolved, and the position registration request signal after the restoration of the failure. It is possible to limit the mobile stations that transmit the communication, and to prevent an increase in communication traffic due to simultaneous transmission by a plurality of mobile stations.

FIG. 6 shows a third location registration control sequence according to the present invention, which corresponds to the control operation (3) according to the principle configuration shown in FIG. When the periodic communication between the wireless base station 1 and the control station 3 is interrupted, the wireless base station 1 detects the occurrence of a failure,
Similar to FIGS. 4 and 5, the radio base station 1 transmits the in-fault notification information including the control channel structure and the location information of the own station at the timing when the call control is not performed (b in FIG. 6). When the mobile station 2 receives the above-mentioned in-fault notification information (b in FIG. 6) when the base zone shifts or the power is turned on in the base zone, the mobile base station 2 is controlled by the transmission suspension storage control unit 217 (FIG. 3). The side recognizes that the fault is occurring, temporarily suspends transmission of the position registration request signal for updating the position information of the control station, and stores the suspended state (S2 in FIG. 6).
0).

The periodic communication between the wireless base station 1 and the control station 3 is resumed (FIG. 6c), and when the failure recovery is detected, the wireless base station 1 sends the failure recovery information from the failure recovery information sending unit 114 (FIG. 2). The recovery notification information (d in FIG. 6) is transmitted. Upon receiving the information, the mobile station 1 recognizes that the failure recovery transmission activation unit 218 (FIG. 3) has recovered from the failure and temporarily suspends the transmission of the location registration request signal during the failure, and the transmission suspension storage control unit 217
When recognizing from the stored contents of (FIG. 3) (S21 of FIG. 6),
A position registration request signal (e in FIG. 6) is transmitted. The wireless base station 1 receiving this information transmits the location registration data to the control station 3 (f in FIG. 6), so that the location information of the control station is updated to the latest location information.

When the location information is updated, the control station 3 transmits the location registration reception data to the radio base station 1 (g in FIG. 6), and transmits a registration reception signal from the radio base station 1 (h in FIG. 6).
The mobile station 2 receiving the signal completes the location registration, and the inconsistency in the location registration information between the control station 3 and the mobile station 2 is resolved. As described above, the transmission of the location registration request from the mobile station is suspended due to the notification of the failure, and the location registration request signal from the suspended mobile station is transmitted after the recovery from the failure. By controlling not to transmit the position registration request signal, it is possible to prevent an increase in communication traffic due to simultaneous transmission by a large number of mobile stations after recovery from the failure.

FIG. 7 shows a fourth position registration control sequence according to the present invention, which corresponds to the control operation (4) according to the principle configuration of FIG. When the periodic communication between the radio base station 1 and the control station 3 is interrupted, the radio base station 1 detects the occurrence of a failure as in the case of FIGS. And the in-fault notification information (FIG. 7B) including the location information of the own station at a timing when the call control is not performed. When the mobile station 2 shifts to the base zone or powers on in the base zone, the mobile station 2 receives the fault notification information from the radio base station 1 and recognizes that the fault has occurred, and the position of the mobile station registered in the control station 3. A location registration request signal for updating information is transmitted to the radio base station 1 (c in FIG. 7), and the fact that registration transmission during failure has been performed by the failed information processing unit 214 (FIG. 3) is stored ( S20 in FIG. 7). However, this location registration request signal is not transmitted to the control station 3 because of the failure, and the radio base station 1 operates the location registration rejection information transmitting unit 120 (FIG. 2) during the failure, and during the failure, The associated registration rejection signal (d in FIG. 7) is returned to the mobile station 2. Mobile station 2
Receives the registration refusal signal, refers to the refusal reason information therein, displays the reason, and suspends the retransmission of the location registration request signal performed in accordance with a preset threshold value (S21 in FIG. 7).

When the periodic communication between the wireless base station 1 and the control station is resumed and the failure recovery is detected, the wireless base station 1 transmits the failure recovery notification information by the operation of the failure recovery information sending unit 114 (FIG. 7). f). Upon receiving the information, the mobile station 2 recognizes the restoration of the failure and, when recognizing that the location registration request signal was transmitted during the failure by referring to the storage contents of the information processing unit 214 during the failure, suspends retransmission. The release transmission activation unit 220 (FIG. 3) is driven to release the retransmission of the position registration request signal by the registration rejection signal (S22 in FIG. 7),
A position registration request signal is transmitted (g in FIG. 7). The wireless base station 1 that has received this position registration request signal updates the position information of the control station to the latest position information by transmitting the position registration data to the control station 3. Thereafter, FIGS.
The description is omitted.

As described above, by limiting the mobile stations to which the position registration request signal is retransmitted and by controlling the mobile station not to retransmit an unnecessary position registration request signal in the event of a failure, a plurality of position registration request signals can be transmitted. It is possible to prevent an increase in communication traffic due to simultaneous transmission by mobile stations.

FIG. 8 shows a fifth position registration control sequence according to the present invention, which corresponds to the control operation (5) according to the principle configuration shown in FIG. When the periodic communication between the wireless base station 1 and the control station 3 is interrupted, the wireless base station 1 detects the occurrence of a failure in the same manner as in FIGS. At this time, the radio base station 1 generates a fault occurrence time in the fault occurrence time management unit 119 (FIG. 2), and performs call control on the fault occurrence time in the fault notification information including the control channel structure and the location information of its own station. The transmission is performed at a timing not performed (b in FIG. 8). When the mobile station 2 shifts to the base zone or turns on the power in the base zone, the mobile station 2 receives the fault notification information and stores the fault occurrence time,
In addition, a location registration request signal for recognizing the failure and updating the location information stored in the control station 3 is transmitted to the wireless base station 1 (c in FIG. 8), and the transmission is performed during the failure. , The transmission time, and the transmission time management unit 213 (FIG. 3).
(S20 in FIG. 8), and the failure occurrence time received from the wireless base station 1 is stored in the failure time management unit 222 (FIG. 3). However, the signal is not transmitted to the control station 3 because of the failure, and a registration rejection signal accompanying the failure is returned from the radio base station 1 to the mobile station 2 (d in FIG. 8).

When the mobile station 2 receives the registration rejection signal,
The reason is displayed by referring to the refusal reason information in the information. afterwards,
The location registration request signal transmitted according to a preset threshold is retransmitted. However, since a registration rejection signal accompanying the failure is returned, retransmission is stopped and the location registration fails.

When the periodic communication between the wireless base station 1 and the control station 3 is resumed and the failure recovery is detected, the wireless base station 1 adds the failure recovery notification information to the failure recovery time management unit 116 (FIG. 2). The recovery time and the retransmission designated time zone from the failure time designation management unit 117 (FIG. 2) for the retransmission target mobile station are added and transmitted. The mobile station 2 that has received the information recognizes the failure recovery, the recovery time, and the designated retransmission time zone (S21 in FIG. 8). Subsequently, the mobile station 2 transmits the location registration request signal during the time period designated by the failure time designation retransmission activation unit 221 (FIG. 3) from the failure occurrence time stored in the own station to the recovery time. Is determined (S2 in FIG. 8).
2) If the condition is satisfied, retransmission control section 211 (FIG. 3)
To transmit a position registration request signal (g in FIG. 8).
The wireless base station 1 receiving this information transmits the location registration data to the control station, so that the location information of the control station is updated to the latest location information. Thereafter, the location registration data is sent to the control station 3 to update the data of the mobile station in the same manner as in FIGS.

In this case, a plurality of mobile stations transmit simultaneously by designating an arbitrary time zone in accordance with the time during the failure occurrence period and limiting the mobile stations to which the position registration request signal is retransmitted. This can prevent an increase in communication traffic.

FIG. 9 shows a sixth position registration control sequence according to the present invention, which corresponds to the control operation (6) according to the principle configuration shown in FIG. When the periodic communication between the wireless base station 1 and the control station 3 is interrupted (FIG. 9A), the wireless base station 1 detects the occurrence of a failure as in FIGS. At this time, the radio base station 1 transmits the in-fault notification information including the control channel structure and the location information of the own station at a timing when the call control is not performed (b in FIG. 9). When the mobile station 2 receives the above-mentioned in-fault notification information when the base station shifts or powers on in the base zone, the mobile station 2 recognizes that a failure has occurred and sends a location registration request signal for updating the location information of the control station to the radio station. The data is transmitted to the base station 1 (c in FIG. 9). When receiving a position registration request signal or a position registration request signal by retransmission during the occurrence of a failure, the wireless base station 1 stores the number of the mobile station in the position registration mobile station number storage unit 113 (FIG. 2). Even if the radio base station 1 receives the location registration request signal, the radio base station 1 is discarded without performing transmission to the control station 3 because the radio base station 1 is in failure, and the radio base station 1 sends a registration rejection signal to the mobile station 2 due to the failure. It is returned (d in FIG. 9).

When the mobile station 2 receives the registration rejection signal,
The reason is displayed by referring to the refusal reason information in the information. afterwards,
Retransmission is performed according to a preset threshold,
Since the registration rejection signal accompanying the failure is returned, retransmission is stopped and the location registration fails.

When the periodic communication between the radio base station 1 and the control station is resumed (g in FIG. 9) and the failure recovery is detected, the radio base station 1 stores the location registration mobile station number storage 1 in the failure recovery notification information.
13 and the number of the mobile station 2 to be retransmitted is added and transmitted (h in FIG. 9). The mobile station 2 that has received the failure recovery notification information recognizes the designated mobile station number (S20 in FIG. 9), and checks this mobile station number with its own number to determine whether they match (FIG. 9). S21), if they match, the location registration request signal is retransmitted (i in FIG. 9). The wireless base station 1 receiving this information transmits the location registration data to the control station 3, so that the location information of the control station 3 is updated to the latest location information. Thus, the mismatch between the location registration information of the control station 3 and the current location information of the mobile station 2 is resolved. In addition, by limiting the mobile station that retransmits the position registration request signal by the mobile station number, it is possible to prevent an increase in communication traffic due to simultaneous transmission by a plurality of mobile stations.

FIGS. 10 and 11 show the seventh position registration control sequence (part 1) and (part 2) according to the present invention, and correspond to the control operation (7) according to the principle configuration of FIG. 10 and 11, the radio base stations 1A and 1B are connected to the control station 3 by wire or radio, and the mobile station 2A is located in the zone of the radio base station 1A and the zone of the radio base station 1B. It is assumed that the mobile station 2B is present in the area.

When the periodic communication between the radio base station 1A or 1B and the control station 3 is interrupted (FIG. 10a, a '),
The occurrence of a fault is detected in each of the radio base stations 1A and 1B,
The in-fault notification information including the control channel structure and the location information of the own station is transmitted from the radio base station 1A or 1B at the timing when the call control is not performed (b, b '). When the mobile station 2A or the mobile station 2B switches to the base zone or turns on the power in the base zone, the mobile station 2A or the mobile station 2B receives the above-mentioned fault notification information, recognizes the fault, and updates the location information of the control station 3. The registration request signal is transmitted to the radio base station 1A or 1
B and the fact that the transmission is during a failure is stored (c, c 'in FIG. 10). However, the signal is not transmitted to the control station because of the failure, and the registration rejection signal accompanying the failure is returned from the radio base station 1A or 1B (d, d 'in FIG. 10).

When the mobile station 2A or 2B receives the registration rejection signal, it refers to the rejection reason information in the registration rejection signal and displays the reason. Then, the location registration request signal (e, FIG. e ') is retransmitted, but since the registration rejection signal (f, f') accompanying the failure is returned, retransmission is stopped and the location registration fails.

When the periodic communication between the radio base station 1A or 1B and the control station 3 is resumed (g, g 'in FIG. 11) and the recovery from the failure is detected, the control station 3 returns to the failure recovery base in its own station. Referring to the priority selection table 33a of the wireless base stations 1A and 1B connected to the own station of the station selection unit 33 (FIG. 2),
The retransmission signals of the following location registration request signals are controlled in the order of the radio base stations 1A and 1B. When the radio base station 1A is selected,
The control station 3 sends a radio base station 1A selection instruction (h in FIG. 11) to the radio base station 1A. Upon receiving the data, the wireless base station 1A transmits failure recovery notification information (FIG. 1).
1i). Upon receiving the information, the mobile station 2A in the base zone recognizes the failure recovery and transmits a location registration request signal (j in FIG. 11) having the same content as the location registration request signal c in FIG. Radio base station 1A that has received this information
Transmits the location registration data to the control station 3 (k in FIG. 11), thereby updating the location information of the mobile station 2A of the control station 3 to the latest location information.

When the location information is updated, the control station 3 transmits the location registration acceptance data to the radio base station 1A (l in FIG. 11), and the registration acceptance signal from the radio base station 1A to the mobile station 3 (m in FIG. 11). Send Mobile station 2A that has received the signal
Completes the location registration, and the inconsistency in the location registration information between the control station and the mobile station is resolved. Next, when the radio base station 1B is selected, the control station 3 sends the radio base station 1B to the radio base station 1B.
A B selection instruction is transmitted (h ′ in FIG. 11). The wireless base station 1B that has received the data transmits failure recovery notification information (i ′ in FIG. 11). Upon receiving the information, the mobile station 2B in the base zone recognizes the restoration from the failure and transmits a position registration request signal (j ′ in FIG. 11). The radio base station 2 that has received this information transmits the location registration data to the control station (k ′ in FIG. 11), thereby updating the location information of the mobile station 2B of the control station 3 to the latest location information. When the position information is updated, the control station 3 transmits the position registration reception data to the wireless base station 1B (l 'in FIG. 11), and transmits a registration reception signal from the wireless base station 1B (m' in FIG. 11). The mobile station 2B that has received the signal completes the location registration, and the inconsistency in the location registration information between the control station and the mobile station is resolved.

As described above, in the case of a failure of the control station 3, when the failure is recovered, all the connected radio base stations are sequentially selected and the transmission of the position registration request signal from the mobile station 3 is performed in units of the radio base station. , It is possible to prevent an increase in communication traffic from a plurality of wireless base stations.

[0052]

According to the location registration control method of the present invention, the mobile station whose location information has been updated when a control station or a connection line between the control station and the radio base station has failed, and all mobile stations after recovery from the failure By retransmitting the location registration transmission, it is possible to quickly resolve the mismatch between the location information of the mobile station registered in the control station and the current location of the mobile station. In addition, by limiting the number of mobile stations and radio base stations to be retransmitted, it is possible to reduce the increase in the communication traffic on the wireless line due to retransmission of location registration, and it is possible to carry out communications other than location registration smoothly. Becomes Further, the reliability of the mobile communication system can be improved by improving the use efficiency of the radio link and the quality of the radio link.

[Brief description of the drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram illustrating a configuration (part 1) of an embodiment.

FIG. 3 is a diagram illustrating a configuration (part 2) of the embodiment;

FIG. 4 is a diagram showing a first location registration control sequence according to the present invention.

FIG. 5 is a diagram showing a second location registration control sequence according to the present invention.

FIG. 6 is a diagram showing a third location registration control sequence according to the present invention.

FIG. 7 is a diagram showing a fourth location registration control sequence according to the present invention.

FIG. 8 is a diagram showing a fifth location registration control sequence according to the present invention.

FIG. 9 is a diagram showing a sixth location registration control sequence according to the present invention.

FIG. 10 is a diagram showing a seventh location registration control sequence (1) according to the present invention.

FIG. 11 is a diagram showing a seventh location registration control sequence (part 2) according to the present invention.

FIG. 12 is a diagram illustrating a block configuration of a mobile communication system.

FIG. 13 is a diagram showing a configuration of a conventional control station, radio base station, and mobile station.

FIG. 14 is a diagram showing a location registration control sequence.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless base station 10 information transmission unit 11 management unit 12 memory 2 mobile station 20 location registration unit 21 processing unit during failure 22 failure recovery unit 23 memory 24 time management unit 3 control station 30 failure recovery base station selection unit

Claims (7)

[Claims] 1. A control station connected to a plurality of radio base stations,
In a mobile communication system in which a mobile station communicating wirelessly with the radio base station generates a location registration request signal by moving between base zones or the like, and mobile station location registration information managed by the control station is updated, The radio base station detects that a failure in the control station or a failure has occurred in a connection line between the control station and the radio base station, and then, when the failure is recovered, the failure is recovered for the mobile station. The mobile station is provided with a means for transmitting failure recovery notification information notifying that
When receiving the failure recovery notification information from the base station, the base station includes a transmission unit for transmitting a position registration request signal to the zone of the base station,
A location registration control method, wherein a location registration request signal is transmitted from all the mobile stations in the base zone, so that the location base information coincides with the location base information due to the failure. 2. The wireless communication system according to claim 1, wherein:
When detecting that a failure of the control station or a failure has occurred in the connection line between the control station and the radio base station, the transmitting means for transmitting the in-flight notification information to the mobile station; Transmitting means for transmitting fault recovery notification information to the mobile station, wherein the mobile station receives fault notification information from the radio base station when a location registration request signal is generated due to a shift between base zones or the like. Upon receipt, the storage means for storing that the transmission of the location registration request signal was in failure, and when receiving the failure recovery notification information from the radio base station, the storage means stores the fact that the transmission was in failure. A means for retransmitting a location registration request signal when the location registration request signal has been received. 3. The mobile station according to claim 2, wherein the mobile station temporarily suspends transmission of the location registration request signal when receiving the in-fault notification information from the radio base station at the time of transition between base zones or the like. Means for storing the fact that the suspension was in failure, and that when the failure recovery notification information is received from the radio base station, the fact that the transmission during the failure was temporarily suspended is stored in the aforementioned storage means. , A location registration control method comprising: means for activating transmission of a location registration request signal. 4. The wireless communication system according to claim 1, wherein:
When the control station detects that a fault has occurred in its own station or in the line between itself and the radio base station, and receives a location registration request signal from the mobile station, the control station sends a faulty location registration rejection signal to the mobile station. And a means for transmitting failure recovery notification information to the mobile station upon detecting that the failure has been recovered. The mobile station, upon receiving the failure location registration rejection signal from the radio base station, Means for temporarily suspending the retransmission control of the position registration request signal and storing that the temporary suspension of the retransmission control is in failure; and when the failure recovery notification information is received from the radio base station, the aforementioned storage means And a means for restarting the retransmission control of the location registration request signal only when it is stored that the retransmission control during the failure is temporarily suspended. 5. The radio base station according to claim 2, wherein the radio base station stores a fault occurrence time, a means for adding the fault occurrence time to transmitted fault notification information, and a fault recovery time storage. A means for adding a fault recovery time to the fault recovery notification information to be transmitted to the means, and a retransmission request for a location registration request signal in a specified time zone by adding an arbitrary time zone during the fault period to the fault recovery notification information. Means for storing the time at which the location registration request signal was transmitted, means for storing the fault occurrence time added to the received in-fault notification information, and addition to the received fault recovery notification information. Means for storing the specified failure recovery time, and comparing an arbitrary time zone during the failure period added to the failure recovery notification information with the transmission time of the location registration request signal of the own station, and Obi requires location registration Means for retransmitting the location registration request signal when the time slot corresponds to the time zone in which the request signal was transmitted, and limiting the retransmission of the location registration request signal to mobile stations corresponding to the time zone in which the failure occurred. Registration control method. 6. The radio base station according to claim 2, wherein when the radio base station receives a location registration request signal from the mobile station during the fault, the radio base station stores the mobile station number and the fault recovery notification information. The mobile station is provided with a means for adding the above-mentioned mobile station number and transmitting it.
Location registration means for comparing a designated mobile station number added to the information with the own station number, and retransmitting a location registration request signal when the designated mobile station number matches the own station number. control method. 7. The control station according to claim 2, wherein the control station selects a radio base station one by one from a plurality of radio base stations connected at the time of restoration of the failure and sends a failure restoration notification. The radio base station, upon receiving the failure recovery notification from the control station, provides the mobile station in the base zone with
7. A location registration control method, comprising: means for transmitting failure recovery notification information according to claim 1, wherein said wireless base station sequentially transmits a location registration request signal to mobile stations in said base zone.