JPH05300082A - Mobile radio communication system - Google Patents

Abstract

PURPOSE:To make registered position information of a storage device (HLR) coincident with a position registration area in which a mobile equipment is resident quickly by allowing the mobile equipment in a relevant registered area to forcibly send a position registration request signal to a storage device at the restart of the storage device. CONSTITUTION:A storage device (HLR) 15 stores position information or the like of mobile equipments (10a, 10b, 11a, 11b) in the unit of position registration areas LA1, LA2 and allows plural radio base stations(BS) 121-123, 124-126 in an area in the unit of the position registration areas LA1, LA2 at the arrival of a call to a mobile equipment. Mobile communication exchange stations (MSC) 131, 132 send position registration restart command information including a specific number of the HLR 15 restarted from each of the radio base stations 121-126 accommodated in the HLR 15 at the restart of the HLR 15. The position registration request signal is forcibly sent to a mobile station relevant to a commanded specific number among mobile equipments receiving the command information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio communication system, and more particularly to a mobile radio communication system for recovering location information of a location registration area in which a mobile station is located when resuming location registration.

FIG. 9 shows a schematic configuration diagram of a general mobile radio system. In the figure, the mobile station (MS) 1 is a base station (B
S) A terminal capable of bidirectional wireless communication with 2 _{1 to} 2 ₆ . Each of BS2 ₁ to 2 ₆ can perform wireless communication with MS1 only with the wireless zones centered on BS2 _{1 to} 2 ₆ , respectively, but each wireless zone of BS2 ₁ to 2 ₃ is a location registration area (or simultaneous). Read-out area) constitutes LA ₁ and B
S2 ₄ to 2 ₆ each radio zone constitute a location area (or paging area) LA _2.

Mobile communication switching centers (MSCs) 3 ₁ and 3 ₂ are switching centers having functions for implementing call connection control and service control for providing mobile communication services.
SC3 ₁ is BS2 _{1 to} 2 ₃ and MSC3 ₂ is BS2 ₄ to
It is connected with ₂₆ . Gate Mobile Switching Center (GS) 4
Is an exchange that receives calls from other networks to subscribers within the own network or to roaming subscribers within the own network.
While connected to SC3 ₁ and 3 ₂ via a communication line,
The home location register (HLR) 5 is connected through a control signal line so that the home location register (HLR) 5 can be inquired of position information.

The HLR 5 is a location registration area LA ₁ , LA ₂
It is a register that stores the location information of the MS 1 in units, and is a database that guarantees the mobility of the MS 1 and manages all information necessary for providing services to the subscribers and the MS 1. Location registration area L for incoming MS1
Simultaneous reading is performed in units of A ₁ and LA ₂ .

In the mobile radio system having such a configuration, when the HLR 5 is restarted for some reason,
Re-registration of location information that accurately indicates the location of MS1 in HLR5 is required.

[0006]

2. Description of the Related Art In a conventional mobile radio communication system, location registration is roughly performed in the following procedure. First, BS in Figure 9
2 _{1 to} 2 ₃ notify the MS ₁ of information for position registration and the like by broadcast information. Was located in the location area LA ₁ in this state MS1 location registration area LA ₂
If you move to, MS1 detects a change in the location registration area by broadcast information from the BS2 ₄ ~BS2 _6.

As a result, the MS 1 sends out a location registration request signal. This position registration request signal is supplied to the MSC3 ₂ via any one of the BSs _{2 4} to 2 ₆ and the MSC 3 ₂ performs the authentication procedure based on this. When the authentication result is normal, the MSC3 ₂ sends a location registration instruction signal to the HLR ₅ to register the routing number and location information in the MSC 3 ₂ , and at the same time returns a location registration acceptance signal to the MS 1.

When the HLR ₅ receives the position registration instruction signal from the MSC 32, the HLR ₅ receives the routing number (PRN) and the MS1.
The location information (LI) indicating the location registration area in which is located is registered. When a call arrives at the MS1, the GS4 reads the location information registered in the HLR5 from the subscriber number of the MS1 in the dialed number from the caller, and the BSs in the location registration area indicated by the location information perform simultaneous readout. Let

Upon simultaneous paging, MS1 automatically sends a response signal to MSC via BS. Then, the MSC establishes an empty communication channel by a known procedure and connects the line. In this way, wherever the mobile device moves, the location information of the location registration area in which the mobile device is located is updated and registered in the HLR5, so that the mobile device can receive a call from a caller of another network. become.

[0010]

However, if the HLR is restarted for some reason such as a failure of the HLR5, all the stored contents of the HLR5 will be reset. Therefore, in the conventional method, the maintenance station backs up at a certain time unit. The position information of each mobile device updated and stored in the file is read from the backup file and registered in the HLR 5 again.

Therefore, in the conventional method, the HL is restarted when the HLR is restarted.
Since the location information of R5 will be replaced with the location information of the backup file, the location information of the mobile station replaced by HLR5 and the location information of the mobile station after the HLR restart may not match. In that case Will not be able to call the mobile device. In the conventional method, HLR5
In order to restore the registered location information of the mobile station to the location information of the mobile station after the HLR is restarted, there was no choice but to wait for a call from the mobile station or a change in the location registration area.

The present invention has been made in view of the above points,
An object of the present invention is to provide a mobile radio communication system that solves the above problems by promptly restoring the registered location information of the HLR when the HLR is restarted.

[0013]

According to the mobile wireless communication system of the present invention, a mobile device is stored in a storage device based on a position registration request signal sent from the mobile device every time the mobile device moves to a different location registration area. The position information of the position registration area in which the mobile device is located is updated and registered, and at the time of an incoming call to the mobile device, based on the position information read from the storage device, in the position registration area in which the mobile device is located. In a mobile wireless communication system in which a plurality of base stations are simultaneously called, when the storage device is restarted, a position including the unique number of the storage device restarted from each of the plurality of base stations accommodated in the storage device. Registration resumption instruction information is transmitted, and the location registration request signal is forcibly transmitted from the mobile station corresponding to the unique number among the mobile stations that have received the location registration resumption instruction information.

According to the second aspect of the present invention, a plurality of mobile communication switching stations provided corresponding to the plurality of location registration areas are instructed with a time difference, and the instructions are transmitted via the mobile communication switching station. Based on this, the location registration restart instruction information is transmitted from the plurality of base stations.

According to the third aspect of the present invention, the location registration resuming instruction information transmitted from each of the plurality of base stations includes the subscriber number of the mobile station, and the subscriber number is periodically changed. Sent out.

According to the invention of claim 4, the mobile telecommunication switching center which has received the position registration request signal forcibly transmitted from the mobile unit via the base station instructs the storage device to immediately register the position information. To do.

Further, in the invention of claim 5, a second storage device for backup of the storage device is provided, and when resuming, the registration position information of the second storage device is read and registered in the storage device.

[0018]

According to the first aspect of the present invention, when the storage device is restarted, the position registration request signal is forcibly transmitted from the mobile device corresponding to the storage device. Can be registered in the storage device.

According to the second aspect of the present invention, since the location registration request instruction is transmitted from a plurality of other subordinate stations with a time lag to the plurality of mobile communication switching stations, the mobile stations in the system simultaneously perform location registration. It is possible to avoid sending the request signal.

According to the third aspect of the present invention, since the subscriber numbers are grouped, it is possible to prevent all the mobile stations in the system from sending the location registration request signal all at once.

According to the fourth aspect of the present invention, it is possible to eliminate the need for comparison and verification between the authentication response from the mobile device and the authentication information response from the storage device, which is required in the case of normal location registration. Furthermore,
In the invention according to claim 5, since the same position information as the registered position information of the first storage device can be registered in the second storage device at all times, the position immediately before the restart is immediately stored in the first storage device at the time of restart. Information can be registered.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a conceptual diagram of one embodiment of the present invention. 9, those parts which are the same as those corresponding parts in FIG. 9 are designated by the same reference numerals, and a description thereof will be omitted. In FIG. 1, the mobile stations 10a and 11a are located in the location registration area LA ₁ ,
Mobile stations 10b and 11b are located in A ₂ .

Mobile units (MS) 10a, 10b, 11a and
And 11b have basically the same configuration as the mobile unit 1 described above.
However, in this embodiment, the wireless base station (BS) 12 is further provided.₁~
12 ₆When more predetermined location registration restart instruction information is received,
It has a function to automatically send the location registration request signal.
It

BS12₁~ 12₃Is MSC13₁Than
Location registration area LA according to instructions₁Mobile device 10a and
11a is called all at once and BS12_Four~
12 ₆Is MSC13₂Location registration area according to instructions from
LA₂Call all mobiles 10b and 11b
Do.

The BSs 12 _{1 to} 12 ₆ perform wireless communication with the mobile units 10a, 11a, 10b or 11b located in their respective radio zones, and at the same time, the higher MSCs 13 ₁ or 13
₂ communicates with the conventional BS2 ₁ to 2 via a communication line.
Similar to ₆ , but the location registration restart instruction information is sent to the mobile units 10a, 11a, based on the instruction from the MSC 13 ₁ or 13 ₂ .
It differs from the conventional one in that it has a function capable of wirelessly transmitting to 10b and 11b.

The MSCs 13 ₁ and 13 ₂ have a function of receiving resumption information from the HLR 15 and a function of instructing the BSs 12 _{1 to} 12 ₃ and 12 _{4 to} 12 ₆ under its control to transmit the position registration resumption instruction information by receiving the resumption information. , Conventional MS
It is a mobile communication switching center added to C3 ₁ and 3 ₂ .

Further, the home location register (HL
The R) 15 is the same as the conventional HLR 5 in that the subscriber number, the mobile unit number, the position information, etc. are read from the backup file (not shown) upon restart, but all MSCs 13 ₁ , 13 in the network are restarted by the restart instruction. _The storage device is different from the conventional one in that it has a function of issuing a restart notification to _2nd and so on. The HLR 15 may be provided for each of the MSCs 13 ₁ and 13 ₂ .

Next, the outline of the location registration of the present invention will be described. When the content of the HLR 15 is cleared and restarted due to the failure of the HLR 15, the HLR 15 will have the same subscriber data (subscriber number) as the stored information of the HLR 15 a predetermined time before from the backup file (not shown) as shown in FIG. , Mobile number), location information and service status etc. are automatically read, and at the same time, as shown in
Resume is notified to all MSCs such as MSCs 13 ₁ and 13 ₂ in the network.

Then, the MSC13₁And 13₂Is under
BS12₁~ 12₃, 12_Four~ 12 ₆More shown in Figure 1
As described above, the position registration restart instruction information is transmitted. By this
Location registration area LA₁Mobile units 10a and 11a
And location registration area LA₂Of mobile units 10b and 11b
Among them, as shown in Fig. 1, it corresponds to HLR15 (HL
Subscribers' mobiles 10a and 1 stored in R15
0b sends out a location registration request signal.

[0030] The location registration request signal BS 12 ₁ to 12
Among the information received via any one of ₆ and read by the HLR 15 from the backup file, the HLR 15 is made to register and update the position information of the mobile devices 10a and 10b. As a result, the position information of the HLR 15 is quickly updated to the correct position information after the restart.

Next, each embodiment of the main part of the present invention will be described. If the BS simultaneously sends the location registration resuming instruction information in accordance with the instructions of all MSCs in the system, it causes congestion of wireless lines and signals and congestion of each device in the system.

Therefore, in the first embodiment of the present invention, as shown in the sequence diagram of FIG. 2, when the HLR 15 is restarted (step 101), the MSC 13 ₁ and All MSCs in the network including 13 ₂ have a unique number (HL) for the HLR 15 that has been restarted for the subordinate BSs such as BS 12 _{1 to} 12 _6.
The location registration restart instruction information including the R number) is transmitted (step 102).

As a result, the mobile units 10a, 11a, 10
b and 11b determine whether the HLR number in the received position registration information matches the HLR number for which the own position information is registered (step 103), and only when they match, the position registration request signal is forcibly made. Is transmitted to the BS and the location is registered in the HLR 15 according to the usual location registration procedure (step 104).

In the normal location registration in step 104, as shown in FIG. 3, when a location registration request signal is transmitted from the mobile station (MS) (step 201), the location of the mobile station in the center of the radio zone in which the MS is located. It is received by the MSC via the BS (step 202), and the MSC requests the HLR 15 to read the authentication information (step 203).

Even when the HLR 15 is restarted, subscriber data, position information, and information such as service status are read from the backup file at the time of restart, as described above, but the position information usually changes with time. On the other hand, since the subscriber data hardly changes, it can be considered that the correct value is read in the subscriber data. Therefore, the HLR 15 sends an authentication information read response to the MSC based on the subscriber data read from this backup file (step 208).

On the other hand, at the same time that the MSC sends the authentication information read request notification to the HLR 15, the MSC sends an authentication request to the MS that has sent the location registration request signal via the corresponding BS (steps 204 and 205). .. Upon receiving this authentication request, the MS notifies the MSC of its own subscriber data as an authentication response via the BS (step 2).
06, 207).

Then, the MSC compares the authentication response information from the MS with the authentication information read response information from the HLR 15 and determines whether or not they match (step 2).
09), only when normal, the MSC instructs the HLR 15 to register the position information indicating the position registration area where the MS of the subscriber data is located, and updates the position information (steps 210 and 211), Notify the MS that the location has been registered via the BS (steps 212, 2).
13).

In this way, the location registration request signal can be wirelessly transmitted only to the MSs (10a and 10b in FIG. 1) registered in the restarted HLR 15 in the first embodiment shown in FIG. The position information can be efficiently restored in the HLR 15 by minimizing the congestion of the mobile communication network.

FIG. 4 shows a sequence diagram of the second embodiment of the essential part of the present invention. In the figure, the same processing steps as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 4, H
When the HLR is restarted, the LR 15 sequentially notifies the MSCs in the network of the restart at regular time intervals (step 1).
11).

Upon receiving the notification of resumption, the MSC is configured to send location registration resumption instruction information including the HLR number of the reactivated HLR 15 to the subordinate BSs (step 102), as in the first embodiment. Therefore, the above MS
Due to the restart notification with a time lag to C, all BSs do not send the location registration instruction information all at once, but sequentially send the location registration restart instruction information in units of BS groups under the control of the MSC. Therefore, according to the present embodiment, the probability of congestion can be reduced even when applied to a larger-scale mobile communication network than the first embodiment.

FIG. 5 shows a sequence diagram of a third embodiment of the essential part of the present invention. In the figure, the same processing steps as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 5, H
Upon receiving the LR restart notification, the MSC causes the BS to send location registration restart instruction information including the subscriber numbers grouped to the BS to the MS (step 121).

The subscriber number is, for example, 8 digits,
If it is “CDEF0000”, the MS has the upper 4 digits of its own subscriber number and the upper 4 digits of the received subscriber number.
It is determined whether or not it matches the digit "CDEF" (step 122). That is, the lower 4 digits of the subscriber number are not judged as matching / mismatching. However, the value "F" in the upper 4th digit of the subscriber number sent from the BS to the MS for the first time is "0".
It is said that.

The BS periodically counts up the value "F" of the upper 4th digit of the subscriber number in the location registration restart instruction information from "0" to "9" by 1 and transmits it (step 123). ). In this way, the location registration request signal is forcibly transmitted for each MS group in which the upper four digits of the subscriber number transmitted from the BS match, and the location information is restored in the HLR 15 according to the location registration procedure of FIG. 3 described above. be registered.

FIG. 6 shows a sequence diagram of the fourth embodiment of the essential part of the present invention. In the figure, the same processing steps as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. HL in MS
When the determination result that the R numbers match is obtained (step 103), the position registration request signal is transmitted from the MS, which is the same as each of the above-described embodiments, but in this embodiment, FIG. As shown in FIG. 3, when the MSC receives this location registration request signal via the BS instead of the normal location registration procedure shown in FIG. 3 (step 131), the MSC immediately receives the HLR.
A position registration instruction is given to 15 (step 132).

Therefore, according to the present embodiment, it is not necessary to compare the authentication response information, and the location information can be repaired and registered in the HLR 15 simply and quickly. The present embodiment may be combined with the second embodiment of FIG. 4 and the third embodiment of FIG. That is, when it is determined in step 103 in FIG. 4 that the HLR numbers match, or in step 122 in FIG. 5 that the subscriber number is the corresponding subscriber number, step 13 in FIG.
It is also possible to simply carry out the processing of 1 and 132 to carry out the restoration registration of the position information in the HLR 15.

By the way, in the above embodiment, the HLR 15 is single as shown in FIG. 1, but it is also possible to use two HLRs 15 as a set. 7 and 8 are HL
R15 is a master HLR (first storage device) and a slave H
The fifth embodiment of the present invention in which a pair of LRs (second storage devices) is provided.
The sequence diagram at the time of normal position registration and HLR restart in an Example is shown. 7, those processing steps that are the same as those corresponding processing steps in FIG. 3 are designated by the same reference numerals, and a description thereof will be omitted.

At the time of normal registration of this embodiment, as shown in FIG. 7, the position information is updated in the master HLR by transmitting the position registration request signal of the MS as in the conventional case (step 2).
11), but at the same time, the master HLR becomes the slave HLR.
The user is instructed to register only the position information of the self registration information (step 221). This makes slave H
The LR constantly updates and registers the same position information as the position information registered in the master HLR (step 222).

Therefore, in the case of the present embodiment, when the master HLR is restarted, as shown in FIG. 8, the master HLR is restarted to notify the slave HLR of the position information request (steps 301 and 302). , Which allows the slave HLR to set the position information (step 3
03), and transmits to the master HLR (step 304).
As a result, the master HLR registers the position information from the slave HLR and repairs it (step 305).

The present invention is not limited to the above embodiment, and the MS may accept the forced location registration only once, for example. In this case, after the HLR is restarted, the MS is prevented from accepting the forced location registration from the broadcast information when making a call or performing normal location registration.

[0050]

As described above, according to the invention described in claim 1, since the position information of the mobile device can be quickly registered in the storage device after the restart, the position of the mobile device managed by the storage device can be registered. It is possible to prevent a state where the mobile device cannot receive a call due to a mismatch between the information and the location registration area where the mobile device is currently located. Further, according to the second and third aspects of the present invention, it is possible to prevent all the mobile stations in the system from sending the location registration request signal all at once, so that the congestion of the mobile communication network can be minimized and the location information can be efficiently provided. Can be repaired.

Further, in the invention described in claim 4, the position information can be restored by the simplified position registration as compared with the normal position registration, and in the invention described in claim 5, the position registration request signal from the mobile device is forced. It has the feature that location information can be easily restored without sending it to the.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

FIG. 2 is a sequence diagram of a first embodiment of a main part of the present invention.

FIG. 3 is a sequence diagram of normal location registration.

FIG. 4 is a sequence diagram of a second embodiment of the main part of the present invention.

FIG. 5 is a sequence diagram of a third embodiment of the main part of the present invention.

FIG. 6 is a sequence diagram of a fourth embodiment of the main part of the present invention.

FIG. 7 is a sequence diagram at the time of normal location registration according to the fifth embodiment of the present invention.

FIG. 8 is a sequence diagram when the HLR is restarted according to the fifth embodiment of this invention.

FIG. 9 is a schematic configuration diagram of a mobile radio system.

[Explanation of symbols]

10a, 10b, 11a, 11b Mobile station (MS) 12 _{1 to} 12 ₆ Radio base station (BS) 13 ₁ and 13 ₂ Mobile switching center (MSC) 15 Home location register (HLR) LA ₁ and LA ₂ Location registration area

Claims (5)

[Claims] 1. A mobile device (10) to a different location registration area.
a, 10b, 11a, 11b)
(10a, 10b, 11a, 11b)
The transfer to the storage device (15) is performed based on the registration request signal.
The position where the aircraft (10a, 10b, 11a, 1b) is located
The position information of the recording area is updated and registered, and the mobile device (10a,
10b, 11a, 11b), the storage device
Based on the position information read from (5), the mobile device
Position registration where (10a, 10b, 11a, 11b) is located
Multiple base stations (12₁~ 12₃, 12_Four~
12 ₆) Mobile radio communication system
In, when the storage device (15) is restarted, the storage device (15)
A plurality of base stations (12₁~ 12₆)husband of
Including the unique number of the storage device (15) restarted
Of the mobile device that has transmitted the registration resumption instruction information and has received the location registration resumption instruction information.
Force the location registration request signal from the mobile device corresponding to the number
A mobile wireless communication system characterized in that the mobile wireless communication system is characterized in that it is sent out. 2. The position registration restart instruction information including the unique number of the restarted storage device (15) is sent from each of the plurality of base stations (12 _{1 to} 12 ₆ ) to send a plurality of the position registrations. A plurality of mobile communication switching stations (13 ₁ , 13 ₂ ) provided corresponding to the areas (LA ₁ , LA ₂ ) are instructed with a time difference, and the mobile communication switching stations (13 ₁ , 1 ₂ ) are instructed.
3 ₂ ) based on the instruction via the plurality of base stations (12
_{1 to} 12 ₆ ) is performed.
The described mobile wireless communication system. 3. The location registration resuming instruction information transmitted from each of the plurality of base stations (12 _{1 to} 12 ₆ ) includes a subscriber number of the mobile device, and the subscriber number is periodically changed. The mobile radio communication system according to claim 1, wherein the mobile radio communication system is transmitted. 4. The position registration request signal forcibly transmitted from the mobile unit is transmitted to the base station (12 _{1 to} 12 ₃ , 12).
_{4 to} 12 ₆ ) via mobile switching center (13 ₁ ,
13. The mobile radio communication system according to claim 1, wherein 13 ₂ ) immediately instructs the storage device (15) to register the position information. 5. A mobile station (10) to a different location registration area.
a, 10b, 11a, 11b) each time the mobile device (10a, 10b, 11a, 11b) moves to the first storage device (5) based on the position registration request signal sent from the mobile device (10a, 10b, 11a, 11b). (10a, 10b, 11a, 1b) updates and registers the position information of the position registration area in which the mobile device (10
a, 10b, 11a, 11b), based on the position information read from the first storage device (5),
A plurality of base stations (12 _{1 to} 12 ₃ , in the location registration area in which the mobile devices (10a, 10b, 11a, 11b) are located)
In the mobile radio communication system in which all the calls are made from 12 _{4 to} 12 ₆ ), a second storage device for registering the position information when the position information is updated and registered in the first storage device (5) is provided. Then, when the first storage device (5) is restarted, the registration position information of the second storage device is read and registered in the first storage device (5).