WO2012031393A1 - Method and system for paging based on imsi - Google Patents

Abstract

A method for paging based on IMSI is disclosed in the present invention, which includes: a Radio Network Controller (RNC) receives the International Mobile Subscriber Identity (IMSI) which is transmitted by a paged User Equipment (UE), and according to the received IMSI and the corresponding relationship between the IMSI, which has been saved in the RNC itself, and the MSC ID, the RNC sends the Initial Direct Transfer, which is transmitted by the paged UE, to the Mobile Switching Center (MSC) which initiates the paging. A system for paging based on IMSI is also disclosed in the present invention. By applying the present invention, instead of computing routing parameters, the MSC which initiates a paging can be found directly according to the IMSI of the UE. Not only is the succeeding rate of IMSI paging effectively improved under Iu flex configuration, but also is the time for IMSI paging effectively saved.

Description

 IMSI-based paging method and system

 The present invention relates to a paging technology of a Universal Mobile Telecommunications System (UMTS), and more particularly to a paging method and system based on an International Mobile Subscriber Identity (IMSI). Background technique

 In UMTS, when Iu Flex is configured, a Radio Network Controller (RNC) can connect to multiple Mobile Switching Centers (MSCs) at the same time. When the core network does not have the Temporary Mobile Subscriber Identity (TMSI) information, the CS domain called UE will use the IMSI paging, and the RNC needs to route the initial direct transmission message of the called UE to the MSC that initiates the paging. To ensure the success of this paging, if the RNC routes the initial direct transmission message of the called UE to the MSC that does not initiate paging, paging failure will result.

The method for selecting the MSC by the RNC described in the 3GPP, 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) protocol is as follows: First, the MSC registered by the UE sends an IMSI paging message and carries itself. The global core network identifier (Global CN ID) and the IMSI of the paged UE, the RNC receives and stores the Global CN ID of the MSC and the IMSI of the paged UE; and then, after receiving the paging message, the UE is in the cause The initial direct transfer message with the value of the paging response carries the intra-domain non-access stratum node selection (IDN S, Intra Domain NAS Node Selector) cell, and in this cell, indicates that the IMSI paging is used. The way, and the routing parameter are calculated by taking IMSI as a natural number in decimal, dividing by 10, and then using 1000 (Decimal To Binary [(IMSI div 10) mod 1000] ); Finally, RNC from the initial direct message IDNNS The cell is known as the IMSI paging mode. According to the calculation method of the routing parameters carried in the cell, the routing parameters corresponding to the previously stored IMSI are calculated, and the corresponding relationship between the routing parameters and the previously saved Global CN ID is obtained, and then the calculated route is obtained. In the parameter, searching for the same routing parameter as the routing parameter carried in the received IDN S cell, if the same routing parameter is found, finding the Global CN ID corresponding to the routing parameter, and The initial direct transmission message is sent to the MSC identified by the Global CN ID, and the paging succeeds. Otherwise, the initial direct transmission message is not sent, and the paging fails. However, this method may calculate the same routing parameters for the IMSIs of different UEs, so that the RNC cannot accurately find the Global CN ID of the MSC that initiated the paging, thereby causing the paging failure. Therefore, the method may easily lead to paging failure, The call success rate is low.

 For example, the UE-1 of IMSI 206201010000270 is currently registered in MSC-1, the UE-2 of IMSI 206201011000271 is registered in MSC-5, and the IMSI is 206201010300275.

UE 3 is registered at MSC-6. The core network simultaneously initiates the IMSI paging for the three UEs. The UE-1, the UE-2, and the UE-3 obtain the respective routing parameters according to the foregoing routing parameter calculation method, and the routing parameters are all 27, and then the initial direct transmission message is sent. Carry as the routing parameter. According to the above paging method, the RNC calculates the routing parameters of the route parameters in the initial direct transmission message, and also calculates the routing parameters of all three. Therefore, since the routing parameters are all 27, the RNC cannot match according to the routing parameters. The MSCs respectively registered by the UE-1, the UE2, and the UE3 are located, and the initial direct transmission message reported by the UE-1, UE2, and UE3 cannot be sent to the MSC that initiates the paging, which ultimately leads to subsequent paging. s failure. Summary of the invention

 In view of this, the main object of the present invention is to provide an IMSI-based paging method and system to solve the problem of low success rate of the existing IMSI paging method.

 In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a paging method based on an international mobile subscriber identity IMSI, the method The method includes: the radio network controller RNC receives the IMSI sent by the paging user equipment UE, and according to the received IMSI, and the corresponding relationship between the IMSI and the mobile switching center MSC identifier that is saved, the initial The message is sent to the MSC that initiated the page.

 In the above solution, the initial direct transmission message sent by the UE is sent to the MSC that initiates paging according to the received IMSI and the corresponding relationship between the IMSI and the MSC identity that is saved by the UE, and the RNC is in the RNC. In the corresponding relationship between the IMSI and the MSC identity that is saved, the IMSI that is the same as the IMSI sent by the UE is found, and the MSC identifier corresponding to the IMSI is found, and the initial sent by the UE is sent according to the found MSC identifier. A message is sent to the MSC that initiated the paging.

 In the foregoing solution, before the RNC receives the IMSI sent by the paging UE, the method further includes: the MSC initiating a paging, and sending, to the RNC, a page that carries the own identity and the IMSI of the paged UE. The RNC receives the paging message, and saves the correspondence between the MSC identifier carried in the paging message and the IMSI of the paged UE.

 In the above solution, before the RNC receives the IMSI sent by the paging UE, the method further includes: the UE carrying its own IMSI in an RRC connection request message, and sending the message to the RNC.

 In the above solution, the UE carries its own IMSI in the RRC connection request message, and is: selecting the initial UE identifier carried in the RRC connection request message as IMSI.

 In the above solution, before the initial UE identifier carried in the RRC connection request message is selected as the IMSI, the method further includes: configuring, in the priority level of the initial UE identifier in the RRC connection request message, the following information: The current TMSI is unavailable. The reason for initiating the RRC connection request is the paging response of the CS domain, and when the paging mode is IMSI paging, the IMSI is selected.

In the above solution, before the RNC receives the IMSI sent by the paging UE, the method further includes: the UE carrying the IMSI of the UE in the initial direct transmission message, and sending the IMSI to the RNC. In the above solution, the UE carries its own IMSI in the initial direct transmission message, specifically: the UE sets the mobile identity of the CM service request requested by the NAS layer message connection management service in the initial direct transmission message. For IMSI.

 The present invention also provides an IMSI-based paging system, the system comprising: an MSC that initiates paging, an RNC, and a paged UE, wherein the RNC includes a receiving unit and a sending unit, and the receiving unit is configured to receive An IMSI sent by the paging UE, configured to: send, according to the IMSI received by the receiving unit, and the corresponding relationship between the saved IMSI and the MSC identity, the initial direct transmission message sent by the paging UE to the initiator Called MSC.

 In the above solution, the paged UE is specifically configured to carry its own IMSI in an RRC connection request message and send the message to the RNC; or, carry the IMSI in the initial direct transmission message and send it to the Said RNC.

 In the foregoing solution, the MSC that initiates the paging is specifically configured to: initiate a paging, and send, to the RNC, a paging message that carries the own identifier and the IMSI of the paged UE; the RNC further includes: a storage unit And configured to receive a paging message sent by the MSC, and save a correspondence between the MSC identifier carried by the paging message and an IMSI of the paged UE.

 In the foregoing solution, the sending unit is specifically configured to: in the corresponding relationship between the IMSI and the MSC identity that is saved by the storage unit, find an IMSI that is the same as the IMSI received by the receiving unit, and then find the IMSI And corresponding to the MSC identifier, the initial direct transmission message sent by the UE is sent to the MSC according to the found MSC identifier.

The IMSI-based paging method and system provided by the present invention finds the MSC identity of the originating paging MSC by matching the IMSI of the UE with the IMSI in the paging message, so that the RNC can according to the found MSC identity, The initial direct transmission message sent by the UE is accurately transmitted to the MSC that initiates the paging. The routing parameters are not calculated, and the MSC that initiates the paging is directly found according to the IMSI of the UE, which can effectively improve the success rate of the IMSI paging when the Iu flex is configured. Moreover, the time of IMSI paging can be saved. DRAWINGS

 1 is a schematic structural diagram of a composition of an IMSI-based paging system according to the present invention;

 2 is a schematic diagram of interaction of a paging process according to Embodiment 1 of the present invention;

 FIG. 3 is a schematic diagram of interaction of a paging process according to Embodiment 2 of the present invention. detailed description

 An IMSI-based paging method according to the present invention is applicable to a network configured by an Iu Flex, and mainly includes the following process: The RNC receives the IMSI transmitted by the paging UE, and according to the received IMSI, and the IMSI and the MSC that have been saved by itself. Corresponding relationship of the identifier, sending the initial direct transmission message sent by the paging UE to the MSC that initiated the paging.

 Specifically, the initial direct transmission message sent by the UE is sent to the MSC that initiates paging according to the received IMSI and the corresponding relationship between the IMSI and the MSC identity that is saved by itself, specifically: the RIMS has saved the IMSI in itself. In the corresponding relationship with the MSC identity, the IMSI that is the same as the IMSI sent by the UE is found, and the MSC identity corresponding to the IMSI is found, and the initial direct transmission message sent by the UE is sent to the MSC identity according to the found MSC identity. The MSC that initiated the paging.

 Before the RNC receives the IMSI sent by the paging UE, the method further includes: the MSC initiating paging, and sending, to the RNC, a paging message that carries the identity of the UE and the IMSI of the paged UE, where the RNC receives the paging message. The paging message is saved, and the correspondence between the identifier of the MSC and the IMSI of the paged UE is saved.

 Here, the MSC identifies a Global CN ID that is specifically an MSC.

 In the present invention, before the RNC receives the IMSI sent by the paging UE, the method may further include: the UE carries its own IMSI in the initial direct transmission message, and sends the IMSI to the RNC.

Here, the UE carries its own IMSI in the initial direct transmission message, which may be: the UE will use the mobile identity of the NAS layer message connection management service request (CM service request) in the initial direct transmission message (Mobile Identity) ) set to IMSI. In the present invention, before the RNC receives the IMSI sent by the paging UE, the method may further include: the UE carries its own IMSI in an RRC CONNECTION REQUEST message, and sends the message to the RNC. .

 Here, the UE carries its own IMSI in the RRC connection request message, specifically: selecting an initial UE identity carried in the RRC connection request message as IMSI.

 The method further includes: configuring the following information in the priority level of the initial UE identifier in the RRC connection request message: If the current TMSI is currently selected in the RRC connection request message, the method further includes: Unavailable. The reason for initiating the RRC connection request is the paging response of the CS domain, and when the paging mode is IMSI paging, the IMSI is selected.

 Specifically, in the prior art, the priority level of the UE carrying the initial UE identifier in the RRC connection request message is specifically: if the TMSI (Global System for Mobile Communications - Mobile Application Part) ) )), select TMSI ( GSM-MAP ); if P-TMSI ( GSM-MAP ) is available, select P-TMSI ( GSM-MAP ); if IMSI ( GSM-MAP ) is available, select IMSI ( GSM- MAP ); If none of the above is true, then select International Mobile Equipment Identity (IMEI).

 In the present invention, the priority level of the UE carrying the initial UE identifier in the RRC connection request message is modified as follows: if TMSI ( ) is available, TMSI ( GSM-MAP ) is selected; if the reason for initiating the RRC connection request is the search of the CS domain When responding, and the paging mode is IMSI paging, IMSI (GSM-MAP) is selected; if P-TMSI (GSM-MAP) is available, P-TMSI (GSM-MAP) is selected; if IMSI (GSM-MAP) If available, select IMSI (GSM-MAP); if none of the above is true, select IMEI.

In the present invention, before the RNC sends the initial direct transmission message sent by the paging UE to the MSC that initiates the paging, the method may further include: sending, by the UE, the reason to the RNC The value is the initial direct transmission message of the paging response, and carries the means for indicating the use of the IMSI paging mode.

IDN S cell.

 The IDN S cell may further include the following content: The calculation method of the routing parameter is to divide the IMSI number into a natural number in decimal, divide by 10, and then use 1000 to reserve. This is prior art and will not be described in detail.

 To implement the above method, the present invention also provides an IMSI-based paging system. Referring to FIG. 1, the system includes: an MSC-11, a RNC-12, and a paged UE-13, which initiate paging. The RNC-12 includes a receiving unit 121 and a transmitting unit 122. The receiving unit 121 is configured to receive the IMSI transmitted by the paging UE-13, and the sending unit 122 is configured to receive the IMSI according to the receiving unit 121, and the saved The mapping between the IMSI and the MSC identity sends the initial direct transmission message sent by the paging UE to the MSC-11 that initiated the paging.

 The paged UE 13 is specifically configured to carry its own IMSI in an RRC connection request message and send it to the RNC-12; or, carry its own IMSI in the initial direct message and send the message to the RNC-12.

 The MSC 11 that initiates paging is specifically configured to initiate paging, and send a paging message to the RNC-12 that carries the IMSI with its own identity and the paged UE-13; the RNC 12 further includes: The unit 123 is configured to receive a paging message sent by the MSC-11, and save a correspondence between the MSC identifier carried by the paging message and the IMSI of the paged UE-13.

 The sending unit 122 is specifically configured to: in the corresponding relationship between the IMSI and the MSC identity that is saved by the storage unit 123, find the same IMSI as the IMSI received by the receiving unit 121, and then find the MSC corresponding to the IMSI. Identifying, the MSC identity found by the residence, and sending the initial direct transmission message sent by the UE-13 to the MSC-11.

 Embodiment 1

As shown in FIG. 2, the IMSI-based paging method in this embodiment may specifically include the following processes: Step 201: The MSC initiates paging, and sends a Global CN ID carrying its own and a CS domain paging message of the IMSI of the paged UE.

 Step 202: The RNC receives the paging message, saves the Global CN ID of the MSC carried therein, the IMSI of the paged UE, and the corresponding relationship between the two, and transparently transmits the paging message to the paged UE;

 Step 203: The paging UE receives the paging message. When it is determined that the TMSI is not available, and the paging message determines that the paging mode of the paging is an IMSI paging, the UE is in an RRC connection request. The message carries the initial UE identifier as the IMSI, and the RNC saves the IMSI of the paged UE carried therein after receiving the RRC connection request message.

 Steps 204-206, interaction between the UE and the RNC, and between the RNC and the NodeB, complete

The establishment process of the RRC connection.

 Step 207: The UE sends an initial direct transmission message whose cause value is a paging response, where the initial direct transmission message carries an IDNNS cell, indicating that the IMSI mode is used, and the calculation method of the routing parameter is to treat the IMSI as a natural number in decimal After dividing by 10, use 1000 more;

 Step 208: The RNC receives the initial direct transmission message sent by the UE, and the IDNNS routing mode is the IMSI mode. In the corresponding relationship between the saved IMSI and the Global CN ID, the IMSI carried in the RRC connection request message with the UE is found. The same IMSI, and finds the Global CN ID corresponding to the IMSI, and sends the initial direct transmission message to the MSC identified by the Global CN ID, that is, the MSC that initiated the paging, and the paging succeeds, after which the UE can Routing its own communication data to the MSC based on the Global CN ID found.

 Embodiment 2

 As shown in FIG. 3, the IMSI-based paging method in this embodiment specifically includes the following processes: Steps 301-302: The same as steps 201-202;

Steps 303-306: The same as steps 203-206, except that the initial UE identifier carried by the UE in the RRC connection request message may not be the IMSI, and the packet temporary identifier (PTMSI, Packet) When the TMSI exists, the initial UE identifier carried in the message may be selected as PTMSI; Step 307: The UE sets the mobile identifier of the NAS layer message CM service request in the initial direct transmission message whose cause value is the paging response to the IMSI, and Sending the initial direct transmission message to the RNC, carrying the IDN S cell, indicating that the IMSI method and the calculation method of the routing parameter are the natural number of the IMSI as a decimal number, and after dividing by 10, the remaining 1000 is used;

 Step 308: The IDNNS routing mode is the IMSI mode, and the RNC searches for the mobile identity of the NAS layer message CM service request in the initial direct transmission message in the corresponding relationship between the saved IMSI and the Global CN ID. IMSI is the same IMSI, and finds the Global CN ID corresponding to the IMSI, and sends the initial direct transmission message to the MSC identified by the found Global CN ID, that is, the MSC that initiated the paging, the paging succeeds, and then the UE It is possible to route its own communication data to the MSC based on the Global CN ID found.

 The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim  A paging method based on the International Mobile Subscriber Identity (IMS), characterized in that the method comprises:  The radio network controller RNC receives the IMSI transmitted by the paging user equipment UE, and according to the received IMSI, and the corresponding relationship between the IMSI and the mobile switching center MSC identity, the initial direct transmission message sent by the paging UE is sent. Send to the MSC that initiated the paging.  The IMSI-based paging method according to claim 1, wherein the initial direct transmission message sent by the UE according to the received IMSI and the corresponding relationship between the IMSI and the MSC identity saved by the UE is performed. The MSC sent to the originating page is:  The RNC finds the same IMSI as the IMSI sent by the UE in the corresponding relationship between the IMSI and the MSC identity that is saved by the RNC, and then finds the MSC identity corresponding to the IMSI, and the UE is determined according to the found MSC identity. The initial direct transmission message sent is sent to the MSC that initiated the paging.  The IMSI-based paging method according to claim 1, wherein before the RNC receives the IMSI sent by the paging UE, the method further includes:  The MSC initiates paging, and sends a paging message carrying the self-identification and the IMSI of the paged UE to the RNC, where the RNC receives the paging message, and the MSC carried in the paging message The correspondence between the identity and the IMSI of the paged UE is saved.  The IMSI-based paging method according to any one of claims 1 to 3, wherein before the RNC receives the IMSI transmitted by the paging UE, the method further includes: the UE The IMSI is carried in the RRC Connection Request message and sent to the RNC. The IMSI-based paging method according to claim 4, wherein the UE carries its own IMSI in an RRC connection request message, which is:  And selecting an initial UE identifier carried in the RRC connection request message as IMSI. 6. The IMSI-based paging method according to claim 5, wherein said Before the initial UE identifier carried in the RRC connection request message is selected as the IMSI, the method further includes:  The following information is configured in the priority level of the RRC connection request message carrying the initial UE identifier: if the current TMSI is unavailable, the reason for initiating the RRC connection request is the paging response of the CS domain, and the paging mode is IMSI paging, Select IMSI.  The IMSI-based paging method according to any one of claims 1 to 3, wherein before the RNC receives the IMSI transmitted by the paging UE, the method further includes: the UE The IMSI is carried in the initial direct transmission message and sent to the RNC.  The IMSI-based paging method according to claim 7, wherein the UE carries its own IMSI in the initial direct transmission message, specifically: the UE will be in the initial direct transmission message. The NAS layer message connection management service requests the mobile identity of the CM service request to be set to IMSI.  An IMSI-based paging system, the system includes: an MSC that initiates paging, an RNC, and a paged UE, where the RNC includes a receiving unit and a sending unit,  a receiving unit, configured to receive an IMSI sent by the paged UE;  And a sending unit, configured to send, according to the IMSI received by the receiving unit, and the corresponding relationship between the saved IMSI and the MSC identity, the initial direct transmission message sent by the paging UE to the MSC that initiates the paging.  The IMSI-based paging system according to claim 9, wherein the paged UE is specifically configured to: carry its own IMSI in an RRC connection request message and send the message to the RNC; or The IMSI is carried in the initial direct transmission message and sent to the RNC. The IMSI-based paging system according to claim 10, wherein the MSC that initiates paging is specifically configured to: initiate a paging, and send, to the RNC, a self-identified identifier, and a paging UE. IMSI paging message; The RNC further includes: a storage unit, configured to receive a paging message sent by the MSC, and save a correspondence between an MSC identifier carried by the paging message and an IMSI of the paged UE.  12. The IMSI-based paging system according to claim 11, wherein the sending unit is specifically configured to:  In the corresponding relationship between the stored IMSI and the MSC identity, the IMSI that is the same as the IMSI received by the receiving unit is found, and then the MSC identifier corresponding to the IMSI is found, and according to the found MSC identifier, The initial direct transmission message sent by the UE is sent to the MSC.