CN106982422B

CN106982422B - Method and device for acquiring 2G/3G location area information in circuit switched fallback

Info

Publication number: CN106982422B
Application number: CN201610034319.5A
Authority: CN
Inventors: 李游; 蔡锴; 刘康
Original assignee: China Mobile Group Chongqing Co Ltd
Current assignee: China Mobile Group Chongqing Co Ltd
Priority date: 2016-01-19
Filing date: 2016-01-19
Publication date: 2020-01-17
Anticipated expiration: 2036-01-19
Also published as: CN106982422A

Abstract

The invention discloses a method and a device for acquiring 2G/3G location area information under CSFB, which comprises the following steps: when SCP requests the position information of called UE to called MSC, called MSC sends paging request to MME; the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling; the calling MSC continues to call to acquire the routing information and roaming number of the called UE; after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call.

Description

Method and device for acquiring 2G/3G location area information in circuit switched fallback

Technical Field

The present invention relates to Circuit Switched Fallback (CSFB) technology in the field of mobile data, and in particular, to a method and an apparatus for acquiring 2G/3G location area information under CSFB.

Background

The CSFB voice service is a circuit switched fallback voice solution. When a user registers in an Evolved Packet System (EPS) network of a 4 th Generation (4G, 4Generation), the EPS network instructs the user to drop back to a target circuit switched domain network and then initiates or receives a voice service. This voice solution is called circuit switched fallback (CSFB in EPS) scheme in evolved packet systems.

In a 2G/3G Mobile Network, when a user subscribes to an intelligent Network service, such as a Virtual Private Network (VPMN), abbreviated as V Network, a Service Control Point (SCP) in the intelligent Network needs to perform differentiated charging according to the location information of the user: referring to fig. 1, after a user triggers an intelligence, an SCP requests a Home Location Register (HLR) network element in a core network for Location information of the user, the HLR receives the request and then initiates a request to a Mobile Switching Center (MSC) registered by the user, and the MSC returns current Location information (e.g., Location Area Identity (LAI) and Global Cell Identity (GCI)) of the user to the HLR, and then returns the current Location information to the SCP to complete differentiated charging.

The existing scheme has at least the following disadvantages:

1. the intelligent called party (CSFB user) can not obtain the position information of 2G/3G through the 4G network.

2. The SCP in the intelligent network cannot acquire the location information of the user, and thus cannot implement services based on the location information, such as preferential area charging, special area call restriction, marketing package formulation within a strategic range, and the like.

3. When the 2G/3G user changes the 4G card, the original preferential service can not be honored, which leads to a great deal of complaints.

4. The missing of the user position information causes that the position positioning function can not be realized, thereby influencing the accurate pushing of the service and restricting the market expansion.

Disclosure of Invention

To solve the foregoing technical problem, embodiments of the present invention provide a method and an apparatus for acquiring 2G/3G location area information under CSFB.

The method for acquiring the 2G/3G position area information under the CSFB provided by the embodiment of the invention comprises the following steps:

when the SCP requests the position information of the called UE from the called MSC, the called MSC sends a paging request to a mobile management node (MME);

the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC;

the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling;

the calling MSC continues to call to acquire the routing information and roaming number of the called UE;

after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call.

In the embodiment of the invention, when the SCP requests the called MSC for the position information of the called UE, the called MSC sends a paging request to an MME, and the method comprises the following steps:

SCP sends a first request instruction to called HLR to request the position information of called UE;

the called HLR sends a second request instruction to the called MSC to request the position information of the called UE;

and when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends a paging request to the MME.

In the embodiment of the invention, the step of transmitting the position information of the called UE to the SCP by the called MSC comprises the following steps:

the called MSC sends the location information of the called UE to the SCP through the called HLR.

In the embodiment of the present invention, before the SCP sends the first request instruction to the called HLR to request the location information of the called UE, the method further includes:

after receiving a call request sent by calling UE, a calling MSC requests routing information of called UE from a called HLR;

the called HLR sends the subscription information of the called UE to the calling MSC;

and the calling MSC triggers the intelligent service of the called UE according to the subscription information of the called UE.

A method for acquiring 2G/3G location area information under CSFB according to another embodiment of the present invention includes:

when SCP requests the position information of called UE to called MSC, called MSC sends pseudo called UE information to called HLR, said pseudo called UE information carries current address acquisition field; the called HLR transmits the pseudo called UE information to SCP;

after the SCP identifies the previous address acquisition field from the pseudo called UE information, the following labels are set: when the calling MSC reports the charging message, the position information of the called UE is obtained again; and, instruct the caller MSC to continue the call;

when the calling MSC reports the charging information to the SCP, the SCP requests and acquires the position information of the called UE from the called MSC again according to the set label, and charging is carried out according to the position information of the called UE.

In the embodiment of the invention, when the SCP requests the called MSC for the position information of the called UE, the called MSC sends the pseudo called UE information to the called HLR, and the method comprises the following steps:

and when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends pseudo called UE information to the called HLR.

In the embodiment of the present invention, after the calling MSC is instructed to continue the call, the method further includes:

after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; and sends a paging request to the MME to complete the call.

The device for acquiring the 2G/3G location area information under the CSFB provided by the embodiment of the invention comprises the following components:

a first control unit, configured to control the SCP, the called MSC, and the MME to perform the following operations: when SCP requests the position information of called UE to called MSC, called MSC sends paging request to MME;

a second control unit, configured to control the MME and the UE to perform the following operations: the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC;

a third control unit, configured to control the called MSC, the SCP, and the calling MSC to perform the following operations: the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling; the calling MSC continues to call to acquire the routing information and roaming number of the called UE;

a fourth control unit, configured to control the called MSC and the UE to perform the following operations: after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call.

In an embodiment of the present invention, the first control unit is further configured to control:

SCP sends a first request instruction to called HLR to request the position information of called UE; the called HLR sends a second request instruction to the called MSC to request the position information of the called UE; and when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends a paging request to the MME.

In an embodiment of the present invention, the third control unit is further configured to control:

In the embodiment of the present invention, the apparatus further includes: a fifth control unit, configured to control the calling MSC and the called HLR to perform the following operations: after receiving a call request sent by calling UE, a calling MSC requests routing information of called UE from a called HLR; the called HLR sends the subscription information of the called UE to the calling MSC; and the calling MSC triggers the intelligent service of the called UE according to the subscription information of the called UE.

Another embodiment of the present invention provides an apparatus for acquiring 2G/3G location area information under CSFB, including:

a first control unit, configured to control the SCP, the called MSC, and the called HLR to perform the following operations: when SCP requests the position information of called UE to called MSC, called MSC sends pseudo called UE information to called HLR, said pseudo called UE information carries current address acquisition field; the called HLR transmits the pseudo called UE information to SCP;

a second control unit for controlling the SCP to perform the following operations: after the SCP identifies the previous address acquisition field from the pseudo called UE information, the following labels are set: when the calling MSC reports the charging message, the position information of the called UE is obtained again; and, instruct the caller MSC to continue the call;

a third control unit, configured to control the calling MSC and the SCP to perform the following operations: when the calling MSC reports the charging information to the SCP, the SCP requests and acquires the position information of the called UE from the called MSC again according to the set label, and charging is carried out according to the position information of the called UE.

SCP sends a first request instruction to called HLR to request the position information of called UE; the called HLR sends a second request instruction to the called MSC to request the position information of the called UE; and when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends pseudo called UE information to the called HLR.

In the embodiment of the present invention, the apparatus further includes: a fourth control unit, configured to control the calling MSC, the called MSC, and the UE to perform the following operations: the calling MSC continues to call to acquire the routing information and roaming number of the called UE; after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; and sends a paging request to the MME to complete the call.

In the technical scheme of the embodiment of the invention, when an SCP requests the position information of called UE to a called MSC, the called MSC sends a paging request to an MME; the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling; the calling MSC continues to call to acquire the routing information and roaming number of the called UE; after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call. Therefore, the position area information of the called UE is obtained through the first CSFB fallback, and the normal voice communication is carried out through the second CSFB fallback, so that the real 2G/3G position information of the called UE is obtained under the CSFB technology, the original differentiated charging service is maintained, and the use experience of upgrading a 2G/3G user into a 4G user is not influenced.

In the technical scheme of the embodiment of the invention, when an SCP requests the position information of called UE to a called MSC, the called MSC sends pseudo called UE information to a called HLR, and the pseudo called UE information carries a current address acquisition field; the called HLR transmits the pseudo called UE information to SCP; after the SCP identifies the previous address acquisition field from the pseudo called UE information, the following labels are set: when the calling MSC reports the charging message, the position information of the called UE is obtained again; and, instruct the caller MSC to continue the call; when the calling MSC reports the charging information to the SCP, the SCP requests and acquires the position information of the called UE from the called MSC again according to the set label, and charging is carried out according to the position information of the called UE. Therefore, after the called UE finally falls back, the 2G/3G position information is fed back, the service purposes of differentiated charging and the like can be accurately and efficiently achieved, and the call delay is greatly shortened.

Drawings

FIG. 1 is a flowchart illustrating a UE located in a 2G/3G network to provide location information to an intelligent network;

fig. 2 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a first embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a second embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a third embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of an apparatus for acquiring 2G/3G location area information under CSFB according to a fifth embodiment of the present invention;

fig. 7 is a schematic structural diagram of an apparatus for acquiring 2G/3G location area information under CSFB according to a sixth embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

The existing mechanism for acquiring the user position information under the 2G/3G/4G network has the following defects: because the 4G network is independent of the voice service, when the user initiates or receives a voice call in the 4G network, the CSFB technique migrates the user back to the 2G/3G network for connection, the whole process requires time processing, and the called user cannot provide the 2G/3G location information even in the 4G network, so that the SCP cannot acquire the 2G/3G location information of the user in time, and differential charging for the location information cannot be realized. Even after the original 2G/3G user is upgraded to a 4G user, the preferential charge enjoyed by the user cannot be redeemed.

The embodiment of the invention aims to realize the acquisition of the real 2G/3G position information under the CSFB technology, thereby keeping the original differentiated charging service and not influencing the use experience after the 2G/3G user is upgraded to the 4G user.

Fig. 2 is a flowchart illustrating a method for acquiring 2G/3G location area information under a CSFB according to a first embodiment of the present invention, where as shown in fig. 2, the method for acquiring 2G/3G location area information under a CSFB includes the following steps:

step 201: when SCP requests the position information of called UE to the called MSC, the called MSC sends a paging request to MME.

Here, when the called MSC determines that the called UE does not support CSFB or is not located in the 4G network, the called UE directly acquires and feeds back Location information in a Visitor Location Register (VLR) in the 2G/3G network.

Step 202: and the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC.

Step 203: the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling.

In the embodiment of the invention, the step of transmitting the position information of the called UE to the SCP by the called MSC comprises the following steps: the called MSC sends the location information of the called UE to the SCP through the called HLR.

Step 204: the calling MSC continues to call, and obtains the routing information and roaming number of the called UE.

Step 205: after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call.

Fig. 3 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a second embodiment of the present invention, where as shown in fig. 3, a corner mark a represents a calling party, and a corner mark b represents a called party, and the method for acquiring 2G/3G location area information under CSFB includes the following steps:

step 301: MSCa receives a call request signaling CM _ Service _ REQ initiated by a calling subscriber;

step 302: MSCa sends routing information (SRI, Send RouteneiInfo) to HLRb after passing through conventional processes such as authentication and encryption, and requests routing information of a called number from the HLRb;

step 303: HLRb returns subscription information (T _ CSI) of the UE to MSCa through SRI _ ACK;

step 304: the MSCa sends IDP to SCPb according to the T _ CSI to trigger called intelligent service;

step 305: SCPb sends ATI (carrying Current Location field) to HLRb, and requests the position information of the user from the HLRb;

step 306: HLRb sends PSI (carrying Current Location field) to MSCb, and requests the position information of the user from MSCb;

step 307: MSCb identifies that the UE is a CSFB user and is positioned under a 4G network, namely the SGs interface state is Associated, and immediately sends a paging request to MME;

step 308: the MME indicates the user to fall back to 2G/3G, and the UE feeds back the position information (GCI) to the MSCb through a Paging Response or Location Update signaling;

step 309: the MSCb returns the real position information GCI of the user after falling back to the 2G/3G network to the HLRb through the PSI _ ACK;

step 310: HLRb transmits GCI parameters to SCPb through ATI _ ACK;

step 311: SCPb stores the user position information after receiving the user position information for subsequent charging, and simultaneously issues commands such as RRBE, AC, FCI, Continue or Connect and the like to MSCa to Continue calling the service;

step 312: MSCa carries on the normal procedure of getting the called route, MSCb provides the roaming number to MSCa through HLRb for the continued call;

step 313: MSCa initiates an incoming call request IAM to MSCb;

step 314: carrying out a CSFB call drop-back flow of the called user, and finally dropping the UE into the 2G/3G network;

step 315: the MSCb returns ACM and ANM to the MSCa to represent that the user connects the call;

step 316: MSCa sends charging report (ACR) to SCPb after receiving ANM message;

step 317: after receiving the ACR, SCPb charges according to the user location information just saved.

So far, SCPb can be charged differentially through the position information.

In the technical scheme of the embodiment of the invention, when the UE is an intelligent user, the 2G/3G location area information is acquired through the first CSFB fallback during the connection, and then the normal voice communication is carried out through the second CSFB fallback. When SCP sends AT (carrying Current Location field) to HLR, HLR sends PSI (carrying Current Location field) to MSC, MSC recognizes UE as CSFB user and locates under 4G network, namely SGs interface state is Associated, and sends paging request to MME immediately. The MME indicates the UE to fall back to 2G/3G, the UE feeds back position information (GCI) to the MSC through a Paging Response or Location Update signaling, the MSC feeds back the position information to the SCP through the HLR, and the SCP carries out services such as charging and the like according to the position information.

By implementing the embodiment of the invention, when the UE is an intelligent user, the position information of the user can be effectively acquired by a method of falling back to the 2G/3G network. After the SCP in the intelligent network acquires the location information of the UE, services based on the location information, such as preferential area charging, special area call restriction, marketing package formulation within a strategic range, and the like, can be implemented. When the 2G/3G user changes the 4G phone card, the original preferential service can be continuously maintained, and the user does not have abnormal perception when using the preferential service. The obtained position information of the UE can be further used for functions such as position positioning and the like, so that the accuracy of service pushing is improved, and market expansion is facilitated. In a word, the defect that the existing CSFB voice fallback mechanism cannot acquire the real position information of the user under the 4G network architecture is made up, and services such as differentiated charging and the like can be carried out on the real area of the user; meanwhile, the defects that the services such as regional charging privilege are lost after the 2G/3G user is upgraded to the 4G user can be avoided.

The CSFB calling UE initiates the flow of the intelligent network SCP for requesting the position information after falling back to the 2G/3G network, so the CSFB calling UE is not different from the normal 2G/3G user and does not need to be changed. The embodiment of the invention mainly aims at how to acquire 2G/3G position information in a scenario that a called UE is in a 4G network and is an intelligent user and CSFB (Circuit switched fallback) occurs when voice service is received.

Fig. 4 is a flowchart illustrating a method for acquiring 2G/3G location area information under a CSFB according to a third embodiment of the present invention, where as shown in fig. 4, the method for acquiring 2G/3G location area information under a CSFB includes the following steps:

step 401: when SCP requests the position information of called UE to called MSC, called MSC sends pseudo called UE information to called HLR, said pseudo called UE information carries current address acquisition field; the called HLR transmits the pseudo called UE information to SCP.

Here, when the called MSC determines that the called UE does not support CSFB or is not located in the 4G network, the called UE directly obtains the location information in the VLR and performs feedback in the 2G/3G network.

Step 402: after the SCP identifies the previous address acquisition field from the pseudo called UE information, the following labels are set: when the calling MSC reports the charging message, the position information of the called UE is obtained again; and instructs the calling MSC to continue the call.

Step 403: when the calling MSC reports the charging information to the SCP, the SCP requests and acquires the position information of the called UE from the called MSC again according to the set label, and charging is carried out according to the position information of the called UE.

Fig. 5 is a flowchart illustrating a method for acquiring 2G/3G location area information under CSFB according to a fourth embodiment of the present invention, where as shown in fig. 5, a corner mark a represents a calling party, and a corner mark b represents a called party, and the method for acquiring 2G/3G location area information under CSFB includes the following steps:

step 501: MSCa receives a call request signaling CM _ Service _ REQ initiated by UE;

step 502: after the MSCa passes through the conventional processes of authentication, encryption and the like, SRI is sent to HLRb, and the routing information of the called number is requested to HLR;

step 503: HLRb returns the T _ CSI of the UE to MSCa through SRI _ ACK;

step 504: the MSCa sends IDP to SCPb according to the T _ CSI to trigger called intelligent service;

step 505: SCPb sends ATI (carrying Current Location field) to HLRb, and requests the position information of the user from the HLRb;

step 506: HLRb sends PSI (carrying Current Location field) to MSCb, and requests the position information of the user from MSCb;

step 507: MSCb identifies that the UE is a voice terminated Call (CSMT), and the SGs interface state is Associated (namely the UE is positioned under a 4G network), and immediately returns a pseudo PSI _ ACK, wherein the pseudo PSI _ ACK carries Current Location requested and does not perform SGs port paging;

step 508: HLRb transmits the Current Location Retrieved parameter to SCPb through ATI _ ACK;

step 509: after the SCPb identifies the Current Location Retrieved field, marking that the real 2G/3G Location information of the UE is fetched again when the MSCa reports the ACR message in the process, simultaneously sending commands of RRBE, AC, FCI, Continue or Connect and the like to the MSCa by the SCPb, and continuing to call the service;

step 510: MSCa carries on the normal procedure of getting the called route, MSCb provides the roaming number to MSCa through HLRb for the continued call;

step 511: MSCa initiates an incoming call request IAM to MSCb;

step 512: carrying out a normal CSFB call fallback flow of a called user, and finally feeding back position information (GCI) to MSCb by UE through a Paging Response or Location Update signaling;

step 513: the MSCb returns ACM and ANM to the MSCa to represent that the user connects the call;

step 514: MSCa sends charging report ACR to SCPb after receiving ANM message;

step 515: after receiving the ACR, SCPb caches the message, resends ATI (carrying currentlocation field) to HLRb according to the previous label, and requests the position information of the user from the HLRb;

step 516: HLRb sends PSI (carrying Current Location field) to MSCb, and requests the position information of the user from MSCb;

517: the MSCb returns the real position information GCI and the like of the UE which falls back to the 2G/3G network to the HLRb;

step 518: HLRb returns the UE current location information (CGI) to SCPb via ATI _ ACK, which initiates charging.

So far, the SCP can carry out differentiated charging through the position information.

In the technical scheme of the embodiment of the invention, the 2G/3G location area information is acquired only through one CSFB fallback during the connection. When SCP sends ATI (carrying Current Location field) to HLR, HLR sends PSI (carrying Current Location field) to MSC, MSC recognizes UE as CSMT, and SGs interface state is Associated (namely user is under 4G network), pseudo PSI _ ACK is returned immediately, carrying Current Location Retrieved, SGs interface paging is not done. And the SCP newly adds and identifies a Current Location Retrieved field, and marks that the flow needs to obtain the real 2G/3G Location information of the user again when the MSC reports the ACR message. The called user performs the normal CSFB call fallback flow, and finally the UE feeds back the current 2G/3G position information (GCI) to the MSC through the PaginResponse or Location Update signaling and connects the call. After the ACR is received by SCP, caching message, according to the above-mentioned mark, retransmitting ATI (carrying current location field) to HLR, HLR transmitting PSI request to MSC, at this time MSC feeding back real user position information to SCP by means of HLR, then starting charging.

By implementing the embodiment of the invention, the 2G/3G position information is fed back after the user finally falls back, and the purposes of business such as differentiated charging and the like can be accurately and efficiently achieved. When the SCP requests the called MSC to acquire the 2G/3G location information of the user in the 4G network, the MSC feeds back the pseudo PSI _ ACK and carries the relevant fields, and triggers the flow of acquiring the location information again after the SCP receives the ACR, so that a fall-back flow is omitted, and the call delay is greatly shortened. When the UE position information is obtained, the user only falls back once, the flow is simplified, the problem that the probability of call failure is increased due to two falls is solved, and the 2G/3G position information can be accurately obtained. Because the 2G/3G position information of the user is taken from the paging response message of the final voice call, the accuracy is very high, the problem that the information taken back for the first time is inconsistent with the real call position area does not exist, and the charging accuracy is ensured. In a word, the defect that the existing CSFB voice fallback mechanism cannot acquire the real position information of the user under the 4G network architecture is made up, and differential charging can be performed on the area where the UE is really located; meanwhile, the defect that the regional charging preferential service is lost after the 2G/3G user is upgraded to the 4G user can be avoided.

The following explains key terms appearing in the embodiments of the present invention:

ATI: any Time interpolation, queries over Time

PSI: provide Subscriber Information providing user Information

RRBE: request Report BCSM Event requesting Report BCSM Event

BCSM: basic Call State Model, Basic Call State Model

AC: apply Charging

ACR: apply Charging Report

FCI: furnish Charging Information, providing Charging Information

SRI: send Routing Information, sending Routing Information

PRN: provider Roaming Number, providing Roaming Number

Fig. 6 is a schematic structural diagram of an apparatus for acquiring 2G/3G location area information under CSFB according to a fifth embodiment of the present invention, and as shown in fig. 6, the apparatus for acquiring 2G/3G location area information under CSFB includes:

a first control unit 61, configured to control the SCP, the called MSC, and the MME to perform the following operations: when SCP requests the position information of called UE to called MSC, called MSC sends paging request to MME;

a second control unit 62, configured to control the MME and the UE to perform the following operations: the MME indicates the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC;

a third control unit 63, configured to control the called MSC, the SCP, and the calling MSC to perform the following operations: the called MSC transmits the position information of the called UE to the SCP, and the SCP stores the position information of the called UE and instructs the calling MSC to continue calling; the calling MSC continues to call to acquire the routing information and roaming number of the called UE;

a fourth control unit 64, configured to control the called MSC and the UE to perform the following operations: after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and sends a paging request to the MME to connect the call.

The first control unit 61 is further configured to control:

The third control unit 63 is further configured to control:

The device further comprises: a fifth control unit 65, configured to control the calling MSC and the called HLR to perform the following operations: after receiving a call request sent by calling UE, a calling MSC requests routing information of called UE from a called HLR; the called HLR sends the subscription information of the called UE to the calling MSC; and the calling MSC triggers the intelligent service of the called UE according to the subscription information of the called UE.

Those skilled in the art will understand that the implementation functions of each unit in the apparatus for acquiring 2G/3G location area information under CSFB shown in fig. 6 can be understood by referring to the related description of the method for acquiring 2G/3G location area information under CSFB.

Fig. 7 is a schematic structural diagram of an apparatus for acquiring 2G/3G location area information under CSFB according to a sixth embodiment of the present invention, and as shown in fig. 7, the apparatus for acquiring 2G/3G location area information under CSFB includes:

a first control unit 71, configured to control the SCP, the called MSC, and the called HLR to perform the following operations: when SCP requests the position information of called UE to called MSC, called MSC sends pseudo called UE information to called HLR, said pseudo called UE information carries current address acquisition field; the called HLR transmits the pseudo called UE information to SCP;

a second control unit 72, configured to control the SCP to perform the following operations: after the SCP identifies the previous address acquisition field from the pseudo called UE information, the following labels are set: when the calling MSC reports the charging message, the position information of the called UE is obtained again; and, instruct the caller MSC to continue the call;

a third control unit 73, configured to control the calling MSC and the SCP to perform the following operations: when the calling MSC reports the charging information to the SCP, the SCP requests and acquires the position information of the called UE from the called MSC again according to the set label, and charging is carried out according to the position information of the called UE.

The first control unit 71 is further configured to control:

The device further comprises: a fourth control unit 74, configured to control the calling MSC, the called MSC, and the UE to perform the following operations: the calling MSC continues to call to acquire the routing information and roaming number of the called UE; after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; and sends a paging request to the MME to complete the call.

Those skilled in the art will understand that the implementation functions of each unit in the apparatus for acquiring 2G/3G location area information under CSFB shown in fig. 7 can be understood by referring to the related description of the method for acquiring 2G/3G location area information under CSFB.

The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.

In the embodiments provided in the present invention, it should be understood that the disclosed method and intelligent device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. A method for obtaining 2G/3G location area information under Circuit Switched Fallback (CSFB), the method comprising:

a service control point SCP sends a first request instruction to a called home location register HLR to request the location information of a called terminal UE;

the called HLR sends a second request instruction to a called mobile switching center MSC to request the position information of the called UE;

when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends a paging request to a mobile management node (MME);

2. The method of claim 1, wherein the step of transmitting the location information of the called UE to the SCP by the called MSC comprises:

3. The method of claim 1, wherein before the SCP sends the first request command to the called HLR to request location information of the called UE, the method further comprises:

4. A method for obtaining 2G/3G location area information under Circuit Switched Fallback (CSFB), the method comprising:

when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends pseudo called UE information to the called HLR; the pseudo called UE information carries a current address acquisition field; the called HLR transmits the pseudo called UE information to SCP;

5. The method of claim 4 wherein after instructing the calling MSC to continue the call, the method further comprises:

6. An apparatus for acquiring 2G/3G location area information under circuit switched fallback CSFB, the apparatus comprising:

a first control unit, configured to control the SCP, the called MSC, and the MME to perform the following operations: SCP sends a first request instruction to called HLR to request the position information of called UE; the called HLR sends a second request instruction to the called MSC to request the position information of the called UE; when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends a paging request to the MME;

7. The apparatus of claim 6, wherein the third control unit is further configured to control:

8. The apparatus of claim 6, wherein the apparatus for obtaining 2G/3G location area information under a circuit switched fallback CSFB is further configured to: a fifth control unit, configured to control the calling MSC and the called HLR to perform the following operations: after receiving a call request sent by calling UE, a calling MSC requests routing information of called UE from a called HLR; the called HLR sends the subscription information of the called UE to the calling MSC; and the calling MSC triggers the intelligent service of the called UE according to the subscription information of the called UE.

9. An apparatus for acquiring 2G/3G location area information under circuit switched fallback CSFB, the apparatus comprising:

a first control unit, configured to control the SCP, the called MSC, and the called HLR to perform the following operations: SCP sends a first request instruction to called HLR to request the position information of called UE; the called HLR sends a second request instruction to the called MSC to request the position information of the called UE; when the called MSC determines that the called UE supports CSFB and is positioned under the 4G network, the called MSC sends pseudo called UE information to the called HLR;

10. The apparatus of claim 9, wherein the apparatus for obtaining 2G/3G location area information under circuit switched fallback CSFB further comprises: a fourth control unit, configured to control the calling MSC, the called MSC, and the UE to perform the following operations: the calling MSC continues to call to acquire the routing information and roaming number of the called UE; after receiving the incoming call request of the calling MSC, the called MSC instructs the called UE to fall back to the 2G/3G network, and the called UE sends the position information to the called MSC; and sends a paging request to the MME to complete the call.