KR101595531B1 - Back up exchange and apparatus for recovering service in mobile communication system and method thereof - Google Patents

Abstract

The present invention relates to a method for restoring a service using a backup exchange in the event of an exchange failure in a mobile communication system, the method comprising the steps of: detecting a self-station signal point of a PSG group for interworking with an external system connected to an STP network, The signal point of the ISG or the MSG group for interworking with the RNC is differently set and then the signal point of the local station of the ISG or MSG group connected to the RNC is changed to be the same as the signal point of the local station of the previous commercial exchange, Thus, it is not necessary to change the signaling point of the exchange for the exchange which should be performed in each RNC when exchanging the exchange, so that the exchange time of the exchange can be greatly reduced. In addition, the above-mentioned quick service restoration can improve the satisfaction of the user.

WCDMA, Switch, Backup, Service, OSP, DPC

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a backup switching apparatus and a service recovery apparatus and method for a mobile communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange of a mobile communication system, and more particularly to an exchange of a mobile communication system such as a Wideband Mobile Switching Center (WMSC) or a Serving GPRS Support Node (SGSN) (RNC) of a local signal point of an own signal point (OSP) of an interworking PSG (PSTN Signaling Gateway) group and an ISG (Iu Signaling Gateway) and MSG (Megaco Signaling Gateway) It is possible to omit the signal point change operation in the RNC when switching the exchanger by changing or setting in advance the same signal point value of the local station set in the mobile communication exchange where the fault occurs, And more particularly, to a backup switching apparatus and a service restoration apparatus and method of a mobile communication system capable of minimizing the number of backups.

Generally, when a failure occurs in a mobile communication exchange such as a WMSC and an SGSN which are connected to an RNC in a WCDMA (Wideband CDMA) mobile communication network and perform a call or data service to a mobile communication terminal, conventionally, The signal point changing work should be performed to change the signal point to a new signal point corresponding to the local signal point of the backup exchange replacing the faulty mobile communication exchange.

However, the signal point change operation in the RNC as described above is a most time-consuming operation in the switching process of the exchange. It takes a considerable time to switch to the backup exchange due to the RNC signal point change operation, There is a problem that it can not be done quickly.

FIG. 1 illustrates a concept of service recovery using a backup switching center in a conventional WCDMA mobile communication network. Referring to FIG. 1, a switching operation to a backup switching center for service recovery in a conventional WCDMA mobile communication network, do.

First, when a failure occurs in the WMSC 100 that is currently in service, the W-CDMA recovery management system (W-RMS) 102 inputs RNC information of the failed WMSC 100 to the backup WMSC 104, (Asynchronous Transfer Mode) path so that the RNCs 106, 108, 110, and 112 are connected to the backup WMSC 104.

The W-RMS 102 then instructs the RNCs 106, 108, 110, and 112 to change signal point operations for switching to the new backup WMSC 104, and each RNC 106, 108, 110, Deletes the signal point information associated with the connected WMSC 100, and performs a signal point change operation to generate a signal point of the backup WMSC 104. [

However, as described above, the operation of updating the signal point information of the RNC to the signal point information of the backup WMSC is the most time-consuming operation in the switching process of the switching center as shown in FIG. 2, , As shown in FIG. 2, when 12 RNCs are connected to the exchange, it takes about 6 minutes or longer to perform the task of 264 lines, which has been a major cause of the rapid restoration of the mobile communication service.

Therefore, in the mobile communication system, when a failure occurs in a mobile communication exchange such as a WMSC or an SGSN, the local signal point of the PSG group for interworking with the external communication network of the backup exchange, the ISG for interworking with the RNC, The signal point of the local station can be changed to be the same as the local station signal point value set in the mobile communication exchange in which the failure occurs, or it can be set in advance so that the signal point change operation in the RNC can be omitted in case of exchanging the exchange, A backup switching apparatus and a service recovery apparatus and method in a mobile communication system capable of providing a backup service.

The present invention relates to a mobile communication back-up exchange having different signal points for each of its own stations for connection between a signaling transfer point (STP) signaling network and a radio network controller (RNC) A media gateway controller (MGC) for changing a local signal point for connection with the RNC to a first local signal point of the commercial exchange that matches the local signal point of the RNC; And a MGW (Media GateWay) for changing a local signal point to a second local station signal point of the commercial exchange that matches the local signal point of the RNC and connecting to the RNC,

Wherein the MGC comprises: an external network matching unit connected to the STP signaling network with a local signal point having a value different from a local signal point for the RNC; and a local signal point for connection with the RNC when connected to the RNC, And an RNC matching unit for changing the first local signal point of the exchange to connect to the RNC.

In addition, the RNC matching unit is connected to the RANAP signal link of the RNC, and the MGW includes an MGW matching unit connected to the ALCAP signal link of the RNC, and the MGW matching unit is connected to the RNC, To the second local station signal point of the commercial exchanger which has been matched with the ALCAP signal link and connects to the RNC.

In addition, the present invention provides a mobile communication back-up exchange having a different signal point for each of its own stations for connection between an STP signaling network and an RNC, and a self-station signal point for connection with the RNC, A signal point set as a local signal point and connected to the RNC upon switching according to a failure of the commercial exchange; and a second local signal point set in common with the commercial switchboard, the local signal point connected to the RNC, And an MGW connected to the RNC,

Wherein the MGC comprises: an external network matching unit connected to the STP signaling network with a local signal point having a value different from a local signal point for the RNC; and a local signal point for connection with the RNC when connected to the RNC, And an MGC matching unit connected to the MGW at the same local signal point as that of the external network matching unit.

In addition, the RNC matching unit is connected to the RANAP signal link of the RNC, and the MGW includes an MGW matching unit connected to the ALCAP signal link of the RNC. The MGW matching unit, when connected to the RNC, And a second local station signal point of the commercial exchanger matched with the RNC. At this time, the MGW matching unit is connected to the MGC matching unit at a local signal point having a value different from the signal point of the second local station when connected to the MGC.

In addition, the present invention provides a mobile communication service recovery apparatus, comprising: a local signal point set in the RNC when a commercial switching center interlocked with an RNC is switched to a local signal point of the commercial switching center matching the local signal point of the RNC; And a W-RMS for performing a switching switching to connect to the RNC when the commercial exchange fails in the backup exchange, the backup exchange being changed to the same local signal point as the commercial exchange with respect to the RNC.

In addition, the present invention provides a mobile communication service restoration apparatus, comprising: a home signal point set in common with all commercial exchanges cooperating with an RNC; and, when the commercial switching center is switched according to occurrence of a fault, And a W-RMS for performing switching switching to connect to the backup exchange having the same local signal point as that of the commercial exchange with respect to the RNC in the event of failure of the commercial exchange.

The present invention also provides a method for restoring a mobile communication service, the method comprising the steps of: establishing signal points of respective different local stations for connection between an exchange STP signaling network and an RNC; and, when switching to the backup switching center, Changing the local signal point of the exchange to a local signal point of the failed exchange that matches the local signal point of the RNC; and connecting the RNC to the backup switchboard using the modified local signal point, The local signaling point for connection with the RNC includes a first local signal point matched with a RANAP signal link of the RNC and a second local signal point matched with an ALCAP signal link of the RNC.

According to another aspect of the present invention, there is provided a method for restoring a mobile communication service, the method comprising the steps of: establishing signal points of respective different local stations for connection between an exchange STP signaling network and an RNC; And a step of connecting the RNC to the backup switching center using the same local station signal point when switching to a backup switching center in response to the occurrence of a failure of the switching center, The local signal point for connection includes a first local signal point matched with a RANAP signal link of the RNC and a second local signal point matched with an ALCAP signal link of the RNC.

The present invention relates to a method for restoring a service using a backup exchange in the event of an exchange failure in a mobile communication system, the method comprising the steps of: detecting a self-station signal point of a PSG group for interworking with an external system connected to an STP network, The signal point of the ISG or the MSG group for interworking with the RNC is differently set and then the signal point of the local station of the ISG or MSG group connected to the RNC is changed to be the same as the signal point of the local station of the previous commercial exchange, Thus, there is no need to change the signal point of the exchange for the exchange which had to be performed in each RNC when exchanging the exchange, which can advantageously reduce the exchange time of the exchange. In addition, there is an advantage that the user can improve the service satisfaction through the above-mentioned quick service restoration.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

When a failure occurs in a mobile communication exchange such as a WMSC or an SGSN in a mobile communication system, a self-signal point of a PSG group for interworking with an external communication network of a backup exchange, an ISG for an RNC and an MSG group It is possible to omit the signal point change operation in the RNC in case of exchanging the switching center by changing or presetting the local signal point associated with the RNC to the same value as the local station signal point set in the mobile communication exchange in which the failure occurs, It is possible to easily attain the object of the present invention through the technique of shortening the time.

3 illustrates a service backup concept using a backup switch in a WCDMA mobile communication network according to an embodiment of the present invention.

Hereinafter, the switching operation to the backup exchange for service recovery in the event of a failure of the exchange in the WCDMA mobile communication network will be described in detail with reference to FIG.

First, the WMSC 300 manages the circuit-switched connection to the mobile communication exchange supporting the mobile communication service in the circuit-switched network, and controls the mobility such as location update, location registration, It manages the security related functions of data as well as management.

The backup WMSC 302 is an exchange provided to continuously perform the operations performed by the WMSC 300 until the failure of the WMSC 300 that has failed when a fault occurs in the WMSC 300 currently operating. The ISG for connection with the RNCs 306, 308, 310 and 312 and the OSP value of the MSG group are disconnected when the WMSC 300 is switched to the RNCs 306, 308, 310 and 312 The RNCs 306 and 308 use the local signal point values of the ISG and MSG groups of the previous WMSC 300 to be the same as those of the local station signal points set in the same WSS, 310, and 312 without changing the signal point of the RNCs 306, 308, 310, and 312.

The W-RMS 304 is connected to the RNCs 306, 308, 310, and 312 and switches the ATM path when the WMSC 300 is in operation to the backup WMSC 302, Allow the service to continue. At this time, the W-RMS 304 instructs the backup WMSC 302 to perform a signal point change operation so that the mobile communication service can be continuously performed through the backup WMSC 302, and the RNCs 306, 308, 310, and 312, the local signal point value of the MSG group is changed to be the same as the local signal point value of the ISG and MSG group of the previous WMSC 300 in which the failure occurs.

In another embodiment of the present invention, RNCs 306, 308, 310, and 312 are connected to all WMSCs 300 and 302 so as to omit a signal point change operation in RNCs 306, 308, 310, Set the local signal points of the ISG and MSG groups for connection to the same value as one value.

Accordingly, the W-RMS 304 sets the ISG of the backup WMSC 302 and the local signal point value of the MSG group to be the same as the local signal point value of the ISG and MSG group of the WMSC 300 currently operating, 308, 310, and 312 by controlling only the switching operation of the ATM path in the event of failure of the WMSC 300 without instructing the backup WMSC 302 and the RNCs 306, 308, 310, , 312) can be immediately connected to the backup WMSC 302.

The RNCs 306, 308, 310 and 312 are directly connected to a core network and function as access points for services for all services provided through the core network do.

A base station (Node B) 314 plays a role of a physical layer and is responsible for transmission and reception of data through a wireless interface. In addition, according to the control information transmitted from the RNCs 306, 308, 310 and 312, radio physical channels necessary for data exchange are set, and data transmitted from an upper protocol is converted according to the radio environment and transmitted. And transfers data received from a user element (UE) 316 to an upper layer protocol of the RNCs 306, 308, 310, and 312.

The mobile communication terminal 316 is an interface device of a user implementing a service provided in a mobile communication network, supports voice video call with the other party, and supports data services such as wireless Internet through a data network.

A home location register (HLR) 320 is one of external systems connected through a signaling transfer point (STP) signaling network. The home location register (HLR) 320 is connected to the WMSC 300 through a local signal point of the PSG group for interworking with the external system of the WMSC 300 300, and manages the status, statistics, and various service related information of the mobile subscriber as well as current location information of the mobile communication terminal 316.

The Short Message Service Center (SMSC) 322 is connected to the WMSC 300 through a local signal point of the PSG group for interworking with an external system of the WMSC 300 as one of the external systems connected through the STP signal network, To the mobile communication terminal (316).

The Authentication Center (AuC) 318 is connected to the WMSC 300 through a local signal point of the PSG group for interworking with an external system of the WMSC 300, and is connected to the WMSC 300 through an STP signaling network. Authentication for the subscriber, and encryption function for the wireless call interval. That is, for authentication and encryption, a defined authentication algorithm is performed by managing a telephone number, a terminal serial number, an authentication key, and the like for a subscriber in its own database.

A CGS (Cellular Gateway Switch) 324 is connected to the WMSC 300 through a local signal point of a PSG group for interworking with an external system of the WMSC 300, and is connected to a private branch exchange And performs call processing by being connected to a plurality of wired / wireless exchanges.

FIG. 4 illustrates a concept of service recovery through modification of a local signal point of an ISG and a MSG group connected to RNCs 306, 308, 310, and 312 in a backup WMSC 302 according to an embodiment of the present invention. A case where two RNCs 306 and 308 are connected will be described as an example.

4, the backup WMSC 302 includes a MGC (Media Gateway Controller) 400 and a MGW (Media GateWay) 402. When a switch-over command is received from the W-RMS 304, The MGC 400 of the WMSC 302 transmits the local signal point value of the ISU ISU group connected to the RANAP (Radio Access Network Application Part) signal link of the RNCs 306 and 308 to the RNC signal point To the local station value of the previous WMSC where the fault is matched.

4, an RNC 306 connected to an RANAP signal link in an ISG group on an RNC interface unit (I / O Interface for STM-1 board unit) 406 of the MGC 400, The MGC 400 changes the local signal point of the ISG connected to the RANAP signal link of the RNCs 306 and 308 on the IISU 406 from 278F to 268F.

At this time, the MGC 408 can set its own signal point for connection between the STP signal network and the RNCs 306 and 308, The signal point of the own station of the PSG group is maintained at 278F without changing according to the switching of the switching center, and the MGC matching unit I (I / O interface for ss7 by E1 / ATM-E1 board unit: ISEU) / O Interface for Mc by STM-1 board Unit: IMSU) 408 maintains the local signal point value of the MSG group as 278F.

Next, the MGW 402 transmits the local signal point of the MSG group on the IMSU 408 connected to the ALCAP signal link of the RNCs 306 and 308 to the local signal point of the RNCs 306 and 308, To the local signal point value of the matched previous WMSC (300).

4, the RNCs 306 and 308 connected to the ALCAP signaling link in the MSG group on the MGW Mc Interface Interface (STM-1) unit 410 of the MGW 402, The MGW 402 changes the local signal point in the MSG group connected to the ALCAP signal link of the RNCs 306 and 308 on the MMSU 410 from 2790 to 2690. [

5 is a block diagram illustrating a configuration of a backup WMSC 302 according to an embodiment of the present invention in which a plurality of local signal points of ISG and MSG groups connected to RNCs 306, 308, 310, own signal point. In the description of the present invention, a case where two RNCs 306 and 308 are connected will be described.

5, assuming that the local signal points of the ISG and MSG groups of all the commercial WMSC 300 and the backup WMSC 302 connected to the RNCs 306 and 308 are set to the same value, The exchange switching operation in the switching center 302 will be described.

First, if all the commercial WMSCs 300 have the same local station signal point value for connection with the RNCs 306 and 308 as described above, the backup WMSC 302 is also prepared for the switching according to the occurrence of the failure of the commercial WMSC 300 And the same local station signal point value as that of the commercial WMSC 300 is set for the RNCs 306 and 308 in advance.

5, the local signaling point of the ISG group on the IISU 406 connected to the RANAP signal link R1 of the RNCs 306 and 308 in the MGC 400 of the backup WMSC 302 is the RNC 306 and 308 and the 268F that can be directly matched to the WMC 304. When an exchange changeover command from the W-RMS 304 is received, the MGC 400 sets the pre-established WMSC 308 via the RANAP signal link Rl using the local signal point having the same value as that of the RNC 300. [

The local signal point of the MSG group on the MMSU 502 connected to the ALCAP signal link A1 of the RNCs 306 and 308 in the MGW 500 of the backup WMSC 302 is immediately matched with the RNCs 306 and 308 For example, 2690, and when an exchange switch command from the W-RMS 304 is received, the MGW 500 transmits a pre-set all of the pre-set values in the MSG group on the MMSU 502 And connects directly to the RNCs 306 and 308 through the ALCAP signal link A1 using the local signal point of the same value on the exchanger.

5, the MMSU 502 of the MGW 500 connected to the RNCs 306 and 308 via the ALCAP signaling link A1 transmits a local signal point for connection with the RNCs 306 and 308, So that the local signal point for connection with the IMSU 408 of the MS 400 can have different values in the MSG group. That is, an ALCAP of the RNCs 306 and 308, which is a signal point value 2790 of the MSG group on the MMSU 502 of the MGW 500 matching the local signal point value 278F of the MSG group on the IMSU 408 of the MGC 400, The value of 2709 is maintained unchanged to the value of 2690 for connection to the signaling link A1, so that service interworking of BICC (Bearer Independent Call Control), MEGACO (MEdia GAteway COntrol), MTRU and the like becomes possible .

Therefore, since the RNCs 306 and 308 do not need to perform the switching operation of the signaling point for the connection to the backup WMSC 302, the time required for switching the exchange can be significantly reduced.

FIG. 6 illustrates a concept of SGSN recovery in a packet network of a WCDMA mobile communication system according to an embodiment of the present invention. All of the commercial SGSN 600 and the backup SGSN 602, which are connected to the RNCs 306, 308, 310, The exchange switching operation in the backup SGSN 602 will be described on the assumption that the local signal point of the ISG group of the backup SGSN 602 is set to the same value. Hereinafter, a case where one RNC 306 is connected in the description of the embodiment of the present invention will be described.

First, when all the SGSNs 600 and 602 of the packing network have the same local station signal point value for connection with the RNC 306 as described above, the backup SGSN 602 also performs the switching according to the occurrence of the failure of the commercial SGSN 600 The same local signal point value as that of the commercial SGSN 600 is preset for the RNC 306 in advance.

6, the local signaling point of the ISG group connected to the RANAP signal link R1 of the RNC 306 in the backup SGSN 602 is connected to the RNC 306, which performs the switching according to the failure of the commercial SGSN 600, HMS 2620 that can be matched directly with the base station 306, and when a switch-over command from the W-RMS 304 is received, a local station signal of the same value as that of the previous commercial SGSN 600 preset in the ISG group And directly connects to the RNC 306 via the RANAP signal link R1.

At this time, both the commercial SGSN 600 and the backup SGSN 602 can set their own signal points for connection between the STP signal network and the RNC 306, 322, the SCP 323, the HLR 320, the CGS 324, and the like, the signal point of the PSG group is not changed to H'2620, which is the PSG group's own signal point value of the previous commercial SGSN 600, Maintain H'2791, which is the set local signal point value.

In the SGSNs 600 and 602, the RNC 306 is connected only to the SGSNs 602 and 602 via the RANAP signaling link Rl, unlike the WMSCs 300 and 302 of the circuit-switched network, The ISG group's own signal point value of the SGSNs 600 and 602 connected to the RANAP signal link R1 of the RNC 306 is transferred to all the SGSNs 600 and 602 in the same manner as that of the SGSN 600 and 602 It is possible to directly connect to the RNC 306 upon reception of the exchange switching command.

As described above, according to the present invention, in a service recovery using a backup exchange in the event of a switch failure in a mobile communication system, when a switch is switched to a backup switch due to a switch failure, The signal points of the ISG and the MSG group for interworking with the signal point and the RNC are separated and set differently and then the local signal points of the ISG and the MSG group connected to the RNC are changed to be the same as the local signal points of the previous commercial exchanges, By setting in advance, it is not necessary to change the signal point of the exchange for the exchange which had to be performed in each RNC when exchanging the exchange, so that the exchange time of the exchange can be drastically reduced. In addition, the above-mentioned quick service restoration can improve the satisfaction of the user.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

As described above, according to the present invention, in service recovery using a backup exchange in the event of a switch failure in a mobile communication system, it is not necessary to change a signal point of an exchange for each switch, which had to be performed in each RNC, In addition, it is possible to enhance the service satisfaction of the user through the above-mentioned quick service restoration, which is suitable for activating the mobile communication service.

FIG. 1 is a conceptual diagram of service recovery in a conventional mobile communication system,

FIG. 2 is a view illustrating an example of a switchover process for recovering a conventional mobile communication service;

FIG. 3 is a service recovery conceptual diagram in a mobile communication system according to an embodiment of the present invention;

FIG. 4 is a conceptual operation diagram of detailed operation inside a backup exchange for service recovery according to an embodiment of the present invention; FIG.

FIG. 5 is a detailed operation conceptual diagram in a backup exchange for service recovery according to another embodiment of the present invention; FIG.

FIG. 6 is a detailed operation diagram of the SGSN for service recovery in a packet network according to another embodiment of the present invention; FIG.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

300: WMSC 302: Backup WMSC

304: W-RMS 306, 308, 310, 312: RNC

314: Node B 316: UE

318: AuC 320: HLR

322: SMSC 324: CGS

Claims (18)

A mobile communication backup exchange, Each STP signal network having a different signal point for each connection between the STP signaling network and the RNC and having a different value from the local signaling point for the RNC, And a local signal point for connection with the RNC when switching to the RNC in response to a failure of a commercial exchange is changed to a first local signal point of the commercial exchange that matches the local signal point of the RNC, An MGC (Media Gateway Controller) including an RNC matching unit for connecting to an RNC, (Media GateWay), which is connected to the RNC by changing the local signal point connected to the RNC to the second local signal point of the commercial exchange that matches the local signal point of the RNC according to the control of the MGC, The mobile communication backup switch comprising: delete The method according to claim 1, The RNC matching unit, Wherein the RNC is connected to the RANAP signaling link of the RNC. The method according to claim 1, The MGW includes: And an MGW matching unit connected to the ALCAP signaling link of the RNC. 5. The method of claim 4, The MGW matching unit includes: And when the RNC is connected to the RNC, changes its own signaling point for connection with the RNC to a second signal point of the commercial switchboard that was matched with the ALCAP signaling link and connects to the RNC. A mobile communication backup exchange, An external network connection unit connected to the STP signaling network, the STP signaling network having different local signal points for connection between the STP signaling network and the RNC, the local signaling point having a different value from the local signaling point for the RNC; An RNC matching unit which establishes a local signal point for connection to a first local station signal point commonly set in all commercial exchanges and connects to the RNC when switching over in accordance with a failure of the commercial exchange; An MGC including an MGC matching unit for connecting to the MGW as a signal point, And a second signaling point set in common with the commercial switchboard, the signaling point being connected to the RNC under control of the MGC, The mobile communication backup switch comprising: delete The method according to claim 6, The RNC matching unit, Wherein the RNC is connected to the RANAP signaling link of the RNC. The method according to claim 6, The MGW includes: And an MGW matching unit connected to the ALCAP signaling link of the RNC. 10. The method of claim 9, The MGW matching unit includes: Wherein the RNC is connected to the RNC with a signal point of a second self-station of the commercial exchange matched with the ALCAP signal link when connected to the RNC. 10. The method of claim 9, The MGW matching unit includes: And connects to the MGC matching unit with a local signal point having a value different from that of the second local station signal point when connected to the MGC. 1. A mobile communication service recovery device, A backup exchanger for changing a local signal point set in the RNC to a local signal point of the commercial exchange that matches the local signal point of the RNC when the commercial switchboard interlocked with the RNC changes, A W-RMS that performs switching switching to connect to the RNC when the commercial switching center fails, to the backup switching center that has been changed to the same local signal point as the commercial switching center The mobile communication service recovery apparatus comprising: 1. A mobile communication service recovery device, A backup exchanger for establishing the same local station signal point common to all commercial exchanges interworking with the RNC and for connecting to the RNC using the same local station when the commercial switchboard fails due to the occurrence of a fault; A W-RMS that performs switching switching to connect to the backup exchange having the same local signal point as the commercial exchange with respect to the RNC in the event of failure of the commercial exchange; The mobile communication service recovery apparatus comprising: The method according to claim 12 or 13, Wherein the backup exchange comprises: STP signaling network and each of the RNC's own signal points for connection to the RNC. 15. The method of claim 14, Wherein the backup exchange comprises: Wherein the mobile communication service restoration device is a circuit network switching device or a packet network switching device. A method for restoring a mobile communication service, The local signal point set for the RNC of the backup exchange is changed to the local signal point of the faulty commercial exchange that matches the local signal point of the RNC when switching to the backup exchange due to the occurrence of a fault in the commercial exchange interworking with the RNC Step, Connecting the RNC to the backup exchange which has been replaced with the same local signal point as the commercial exchange The method comprising the steps of: A method for restoring a mobile communication service, Setting a local signal point for connection with an RNC to the same value common to all commercial exchanges to which the RNC is connected; Connecting the RNC to the backup switching center using the local signal point set to the same value when switching to the backup switching center due to the occurrence of the failure of the commercial switching center The method comprising the steps of: 18. The method according to claim 16 or 17, The local station signal point for connection with the RNC, A first local signal point matched with a RANAP signal link of the RNC and a second local signal point matched with an ALCAP signal link of the RNC.

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