CN106688281A - Method and associated apparatus for selecting CS domain and PS domain operators of target sharing network - Google Patents

Abstract

The embodiments of the present invention provide a method and an associated apparatus for selecting circuit switching (CS) domain and packet switching (PS) domain operators of the target sharing network, and solves the problem of CS domain registration operators and PS domain operators are inconsistent after user equipment (UE) switches to the target sharing network. The method comprises: when the UE switches to the target sharing network through single radio voice call continuity (SRVCC) or circuit switched fallback (CSFB), before the end of the UE calls in the CS domain, a first mobile switching center (MSC) of the target sharing network receives the mobility management entity coding (MMEC) and public land mobile network identification (PLMN ID) of the UE sent by mobility management entity (MME); the first MSC sends the temporary mobile subscriber identity (TMSI) and location area identity (LAI) of the CS domain to the UE, the TMSI includes the network resource identifier (NRI) of the CS domain, the MMEC is same as the NRI, the LAI contains a PLMN ID, the PLMN ID in the LAI is same as the PLMN ID received by the first MSC, so that the UE sends the registration request message carrying TMSI and LAI of the CS domain to the base station of the target sharing network. The method is applied to the technical field of communications.

Description

Selection target shares the CS domains of network and the method and relevant apparatus of ps domain operator Technical field

The CS domains of network and the method and relevant apparatus of ps domain operator are shared the present invention relates to communication technical field, more particularly to selection target.

Background technology

In legacy network (only one of which operator in network), an operator can provide the user circuit switching (English simultaneously：Circuit Switching, referred to as：CS) domain and packet switch (English：Packet Switching, referred to as：PS) the service in domain, that is, serve the CS domains operator and ps domain operator of user always identical.For example, user equipment (English：User Equipment, referred to as：UE) in one traditional second generation mobile communication technology (English of access：2-Generation wireless telephone technology, abbreviation 2G) network or traditional 3rd generation mobile communication technology (English：3rd-Generation, referred to as：3G) during network, the access network elements for first passing through the network send CS domains login request message and ps domain login request message respectively to the core network element in the CS domains of the network and ps domain, the ps domain core network element for the ps domain login request message for receiving the CS domain core nets network element of the CS domains login request message of the UE and receiving the UE always belongs to same operator, speech business the signal follow-up UE is via CS domains, data service signal is provided the service of CS domains and ps domain by same operator via ps domain for the UE.

But may not always so in shared network.Shared network refers to the network shared by multiple operators, due to the difference of scarcity of resources or network selection strategy, and ps domains and CS domain registration message of the UE in shared network may be received by the core network element of different operators respectively.For example, in a shared network, registration messages of the UE in CS domains is received by the CS domain core net network elements of the first operator, UE is received in the registration message of ps domain by the ps domain core network element of the second operator, and this make it that operators of the UE in the CS domains of this shared network and ps domain is inconsistent.

In order to solve UE in the CS domains of shared network and operator's inconsistence problems of ps domain, prior art proposes a kind of method that selection target shares network C S domains and ps domain operator, with UE is exemplified by the CS domains registration process that target shares network, when the mobile switching centre's (English for the CS domains login request message for receiving UE transmissions：Mobile Switching Center, abbreviation MSC) when judging operator that UE registers in former network C S domains and inconsistent operator belonging to itself, the base station for sharing network to target, which is sent, re-routes order, and request base station is that UE reselects a MSC.If base station judges that the operator that UE is registered in former network C S domains shares network in target and can use, the corresponding core network element of operator for selecting to register in former network C S domains for UE；If base station judges that the operator that UE is registered in former network C S domains is unavailable in the shared network of target, then according to UE international mobile subscriber identity (International Mobile Subscriber Identity, IMSI) information, uses predetermined algorithm to reselect operator for UE.

It can thus be appreciated that, pass through prior art, when UE is in the case where the operator that former network C S domains and ps domain are registered differs, if sharing network in target in the operator that former network C S domains and ps domain are registered all to can use, UE will be consistent with the operator in former network C S domains and ps domain registration respectively in the operator that target shares network C S domains and ps domain, i.e. UE is necessarily differed in the operator that target shares network C S domains and ps domain；If one in the operator that former network C S domains or ps domain are registered is shared in target, network is unavailable, and UE may be differed in the operator that target shares network C S domains and ps domain.And when UE was only registered in ps domain, and the ps domain operator registered is in the case of the shared network of target is available, the method of network C S domains and ps domain operator is shared using above-mentioned selection target, UE shares the CS domains of network registry in target and the operator of ps domain is possible to differ.I.e. by prior art, UE shares the CS domains operator and ps domain operator of network registry it is possible to differing in target.

The content of the invention

Embodiments of the invention provide the method and relevant apparatus that selection target shares network C S domains and ps domain operator, solve UE to share after network from former network switching to a target, the UE is the problem of target shares the CS domains operator and inconsistent ps domain operator of network.

To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：

In a first aspect, the embodiments of the invention provide a kind of moving exchanging center MSC, the MSC includes：Transmitting element；

The transmitting element, for sharing network when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in CS domains are sent to the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique temporary mark GUTI that former network packet exchanges ps domain is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in the login request message in the CS domains that the base station that network is shared to the target is sent.

In the first possible embodiment, with reference in a first aspect, the MSC also includes：Receiving unit；

The receiving unit, MMEC the and PLMN ID in the GUTI for receiving mobile management entity MME transmission, wherein, the MME is the core network element that the UE is registered in former network PS field.

Second aspect, the embodiments of the invention provide a kind of user equipment (UE), the UE includes：Receiving unit and transmitting element；

The receiving unit, for sharing network when the UE switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, receive the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI of the circuit-switched CS domain of the first moving exchanging center MSC transmission of the shared network of target, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique Temporary Mobile GUTI of the packet switched ps domain of former network is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

The transmitting element, sends in the login request message in CS domains, the login request message in the CS domains for sharing the base station of network to the target and carries the TMSI and the LAI.

The third aspect, the embodiments of the invention provide a kind of mobile management entity MME, the MME includes：Transmitting element；

The transmitting element, for sharing network when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the first moving exchanging center MSC for sharing network to the target sends mobile management entity coding MMECs and PLMN mark PLMN ID of the UE in the globally unique Temporary Mobile Subscriber Identity GUTI of the packet switched ps domain of former network, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI.

Fourth aspect, the embodiments of the invention provide a kind of serving GPRS support node SGSN of general packet radio service technology, the SGSN includes：First receiving unit, transmitting element, the second receiving unit and judging unit；

First receiving unit, the login request message for receiving the packet switched ps domain that the base station of the shared network of the target is sent；

The transmitting element, for sending context request message to the first core network element, the context request message carries first and identified, described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

Second receiving unit, NRI information and PLMN id information of the UE in former network C S domains are carried for receiving in the context request response message that first core network element is sent, the context request response message；

The judging unit, for according to the UE former network C S domains NRI information and PLMN id informations, judge whether to receive the login request message of the ps domain.

5th aspect, the embodiments of the invention provide a kind of core network element, including receiving unit and transmitting element；

The receiving unit, for receiving the context request message that the serving GPRS support node SGSN for the first general packet radio service technology that target shares network is sent, the context request information carries first and identified, and described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network；

The transmitting element, for first mark in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.

6th aspect, the embodiments of the invention provide a kind of moving exchanging center MSC, the MSC includes the first receiving unit and the first judging unit；

First receiving unit, the login request message for receiving the circuit-switched CS domain that the base station of the shared network of the target is sent；

First judging unit, network resource identifier NRI information or mobile management entity coding MMEC information for exchanging ps domain in former network packet according to the user equipment (UE) for sending CS domains login request message, and PLMN mark PLMN id informations, judge whether to receive the login request message in the CS domains.

In the first possible embodiment, with reference to the 6th aspect, the MSC also includes：Second judging unit, transmitting element and the second receiving unit；

Second judging unit, for judging whether the MSC is stored with NRI information or MMEC information of the UE in former network PS field, and PLMN id informations；

The transmitting element, judged result for receiving second judging unit, if the judged result, which is the MSC, does not store NRI information or MMEC information of the UE in former network PS field, and PLMN id informations, then context request message is sent to the second core network element, the context request message carries second and identified, second mark Know for representing NRI information or MMEC of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations, wherein, to be the UE switching to before the target shares network second core network element, the core network element registered in former network C S domains；

Second receiving unit, NRI information or MMEC information of the UE in former network PS field, and PLMN id informations are carried for receiving in the context request response message that second core network element is sent, the context request response message.

7th aspect, the embodiments of the invention provide a kind of core network element, the network element includes receiving unit and transmitting element；

The receiving unit, the context request message that the first moving exchanging center MSC of network is sent is shared for receiving target, the context request information carries second and identified, described second identifies for representing that UE described in the first MSC acquisition requests exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain, and PLMN mark PLMN id informations in former network packet；

The transmitting element, for second mark in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains.

Eighth aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the target shares the first moving exchanging center MSC of network to the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in UE transmission CS domains, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique temporary mark GUTI that former network packet exchanges ps domain is identical, the LAI is included PLMN ID in PLMN mark PLMN ID, the LAI are identical with the PLMN ID in the GUTI, to cause the UE to carry the TMSI and the LAI in the login request message in the CS domains that the base station for sharing network to the target is sent.

In the first possible embodiment, with reference to eighth aspect, the target share network the first moving exchanging center MSC send the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in CS domains to the UE before, this method also includes：

First MSC receives MMEC the and PLMN ID in the GUTI that mobile management entity MME is sent, wherein, the MME is the core network element that the UE is registered in former network PS field.

9th aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI for the circuit-switched CS domain that the first moving exchanging center MSC that the UE receives the shared network of target is sent, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique Temporary Mobile GUTI of the packet switched ps domain of former network is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

The UE sends in the login request message in CS domains, the login request message in the CS domains to the base station that the target shares network and carries the TMSI and the LAI.

Tenth aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, and the first moving exchanging center MSC that mobile management entity MME shares network to the target sends mobile management entities of the UE in the globally unique Temporary Mobile Subscriber Identity GUTI of the packet switched ps domain of former network and encoded MMEC and PLMN mark PLMN ID, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the PLMN ID that the LAI is included in PLMN ID, the LAI are identical with the PLMN ID in the GUTI.

Tenth on the one hand, and the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

The login request message for the packet switched ps domain that the base station that target shares the shared network of the serving GPRS support node SGSN receptions target of the first general packet radio service technology of network is sent；

First SGSN sends context request message to the first core network element, the context request message carries first and identified, described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

First SGSN is received in the context request response message that first core network element is sent, the context request response message and is carried NRI information and PLMN id information of the UE in former network C S domains；

First SGSN, in the NRI information and PLMN id informations in former network C S domains, judges whether to receive the login request message of the ps domain according to the UE.

12nd aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

First core network element receives the context request message that the serving GPRS support node SGSN for the first general packet radio service technology that target shares network is sent, the context request information carries first and identified, and described first identifies and exchange the network resource identifier NRI information in CS domains and public for representing UE described in the first SGSN acquisition requests in former lattice network Land mobile identifies PLMN id informations, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

First mark of first core network element in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.

13rd aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

The login request message for the circuit-switched CS domain that the base station that target shares the shared network of the first moving exchanging center MSC reception target of network is sent；

First MSC exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain according to the user equipment (UE) for sending CS domains login request message in former network packet, and PLMN mark PLMN id informations, judge whether to receive the login request message in the CS domains.

In the first possible embodiment, with reference to the 13rd aspect, first MSC exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain according to the user equipment (UE) for sending CS domains login request message in former network packet, and PLMN mark PLMN id informations, before the login request message for judging whether to receive the CS domains, this method also includes：

First MSC judges whether NRI information or MMEC information of the UE in former network PS field that is stored with, and PLMN id informations；

If not having, first MSC sends context request message to the second core network element, the context request message carries second and identified, described second identifies for representing NRI information or MMEC of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations, wherein, to be the UE switching to before the target shares network second core network element, the core network element registered in former network C S domains；

First MSC is received in the context request response message that second core network element is sent, the context request response message and is carried NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.

Fourteenth aspect, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, this method includes：

Second core network element, receive target and share the context request message that the first moving exchanging center MSC of network is sent, the context request information carries second and identified, described second identifies for representing that UE described in the first MSC acquisition requests exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain in former network packet, and PLMN mark PLMN id informations, wherein, second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains；

Second mark of second core network element in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains.

15th aspect, the embodiments of the invention provide a kind of moving exchanging center MSC, the MSC includes processor, bus, memory and transmitter；

Wherein, the processor calls the content in the memory by the bus, network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in CS domains are reassigned for the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique temporary mark GUTI that former network packet exchanges ps domain is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

The transmitter, for the TMSI and LAI to be sent to the UE, so that the UE carries the TMSI and the LAI in the login request message in the CS domains that the base station that network is shared to the target is sent.

In the first possible embodiment, with reference to the 15th aspect, it is characterised in that the MSC also includes：Receiver；

The receiver, MMEC the and PLMN ID in the GUTI for receiving mobile management entity MME transmission, wherein, the MME is the core network element that the UE is registered in former network PS field.

16th aspect, the embodiments of the invention provide a kind of user equipment (UE), the user equipment (UE) includes receiver, processor, bus, memory and transmitter；

The receiver, for sharing network when the UE switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI for the circuit-switched CS domain that the first moving exchanging center MSC that UE receives the shared network of target is sent, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique Temporary Mobile GUTI of the packet switched ps domain of former network is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

The processor calls the instruction in the memory by the bus, generate CS domains login request message, the TMSI and the LAI are carried in the login request message in the CS domains, and CS domains login request message is sent to the target to the base station for sharing network by the transmitter.

17th aspect, the embodiments of the invention provide a kind of mobile management entity MME, the MME includes processor, bus, memory and transmitter；

The processor calls the instruction in the memory by the bus, network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE shares the first moving exchanging center MSC of network to the target before the circuit-switched CS domain communication process that the target shares network terminates The mobile management entity coding MMEC and PLMN mark PLMN ID distributed in the globally unique Temporary Mobile Subscriber Identity GUTI of packet switched ps domain of the UE in former network, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

The transmitter, for mobile management entities of the UE in the globally unique Temporary Mobile Subscriber Identity GUTI of the packet switched ps domain of former network being encoded into MMEC and PLMN mark PLMN ID are sent to the first MSC.

18th aspect, includes receiver, processor, bus, memory and transmitter the embodiments of the invention provide the serving GPRS support node SGSN, the SGSN of a kind of general packet radio service technology；

The receiver, the login request message for receiving the packet switched ps domain that the base station of the shared network of the target is sent；

The processor calls the instruction in the memory by the bus, generate context request message, the context request message carries first and identified, and described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network；

The transmitter sends the context request message to the first core network element, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

The receiver is additionally operable to：Receive in the context request response message that first core network element is sent, the context request response message and carry NRI information and PLMN id information of the UE in former network C S domains；

The processor calls the instruction in the memory by the bus, for, in the NRI information and PLMN id informations in former network C S domains, judging whether to receive the login request message of the ps domain according to the UE.

19th aspect, the embodiments of the invention provide a kind of core network element, the network element includes receiver, processor, bus, memory and transmitter；

The receiver, for receiving the context request message that the serving GPRS support node SGSN for the first general packet radio service technology that target shares network is sent, the context request information carries first and identified, and described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network；

The processor calls the instruction in the memory by the bus, for first mark in the context request message, generate context request response message, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, receive the registration information of the ps domain to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether, and sent the context request response message to the first SGSN by the transmitter.

20th aspect, the embodiments of the invention provide a kind of moving exchanging center MSC, the MSC includes：Receiver, processor, bus and memory；

The receiver, the login request message for receiving the circuit-switched CS domain that the base station of the shared network of the target is sent；

The processor calls the instruction in the memory by the bus, for encoding MMEC information in the network resource identifier NRI information or mobile management entity that former network packet exchanges ps domain according to the user equipment (UE) for sending CS domains login request message, and PLMN mark PLMN id informations, judge whether to receive the login request message in the CS domains.

In the first possible embodiment, with reference to the 20th aspect, the processor is additionally operable to：

Judge whether NRI information or MMEC information of the UE in former network PS field that is stored with, and PLMN id informations；

If no, generating context request message, the context request message carries second and identified, and described second identifies for representing that UE is in original described in the first MSC acquisition requests The NRI information or MMEC of network PS field, and PLMN id informations；

The transmitter sends the context request message to the second core network element, wherein, second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains；

The MSC also includes receiver, and NRI information or MMEC information of the UE in former network PS field, and PLMN id informations are carried for receiving in the context request response message that second core network element is sent, the context request response message.

20th on the one hand, the embodiments of the invention provide a kind of core network element, including：Receiver, processor, bus, memory and transmitter；

The receiver, the context request message that the first moving exchanging center MSC of network is sent is shared for receiving target, the context request information carries second and identified, described second identifies for representing that UE described in the first MSC acquisition requests exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain, and PLMN mark PLMN id informations in former network packet；

The processor calls the instruction in the memory by the bus, for second mark in the context request message, generate context request response message, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains；

The transmitter, for the context request response message to be sent to the first MSC.

22nd aspect, the embodiments of the invention provide a kind of communication system, the communication system includes：Such as the moving exchanging center MSC in terms of first aspect and first aspect the first possible embodiment, 15 and as described in any one of the first possible embodiment in terms of the 15th, with the user equipment (UE) described in second aspect or the 16th aspect, and the mobile management entity MME described in terms of the third aspect or the 17th.

23rd aspect, the embodiments of the invention provide a kind of communication system, the communication system includes：General packet radio service technology described in fourth aspect or the 18th aspect Serving GPRS support node SGSN, and the core network element described in any one of the 5th aspect and the 19th aspect.

Twenty-fourth aspect, the embodiments of the invention provide a kind of communication system, any one of the first possible embodiment in terms of including the 6th aspect to the 6th, with the moving exchanging center MSC described in any one of the first possible embodiment in terms of the 20th aspect to the 20th, and/or the 7th aspect and the core network element described in the 20th one side.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, when user equipment (UE) shares the registration in network progress CS domains or ps domain in target, target shares network side and registers log-on message in former network PS field by the UE, or institute UE is in the log-on message in former network C S domains, the registration that the UE shares network PS field and CS domains in target is carried out.Pass through this method, so that UE is consistent with ps domain operator in the CS domains operator that the shared network side of target is registered, all it is ps domain operator or CS domains operator that the UE is registered in former network side, or be all that the target shares the base station of network according to the IMSI of the UE, by the operator that default strategy is the UE gravity treatments, UE in the prior art is solved the problem of target shares the CS domains operator and inconsistent ps domain operator of network registry.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of schematic diagram of mobile switching centre provided in an embodiment of the present invention；

Fig. 2 is a kind of schematic diagram of user equipment provided in an embodiment of the present invention；

Fig. 3 is a kind of schematic diagram of mobile management entity provided in an embodiment of the present invention；

Fig. 4 is a kind of schematic diagram of the serving GPRS support node of general packet radio service technology provided in an embodiment of the present invention；

Fig. 5 is a kind of schematic diagram of core network element provided in an embodiment of the present invention；

Fig. 6 is the schematic diagram of another mobile switching centre provided in an embodiment of the present invention；

Fig. 7 is the schematic diagram of another core network element provided in an embodiment of the present invention；

Fig. 8 is a kind of computer system schematic diagram provided in an embodiment of the present invention；

Fig. 9 is the method flow diagram one that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

A kind of Figure 10 selection targets provided in an embodiment of the present invention share the method flow diagram two of network C S domains and ps domain operator；

Figure 11 is the method flow diagram of the shared network C S domains of selection target and ps domain operator under a kind of SRVCC scenes provided in an embodiment of the present invention；

Figure 12 is the method flow diagram of the shared network C S domains of selection target and ps domain operator under a kind of called CSFB scenes provided in an embodiment of the present invention；

Figure 13 is the method flow diagram of the shared network C S domains of selection target and ps domain operator under a kind of caller CSFB scenes provided in an embodiment of the present invention；

Figure 14 is the method flow diagram three that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 15 is the method flow diagram four that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 16 is the method flow diagram five that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 17 is the method flow diagram six that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 18 is the method flow diagram seven that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 19 is the method flow diagram eight that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 20 is the method flow diagram nine that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 21 is the method flow diagram ten that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 22 is that the first MSC shown in a kind of Figure 13 provided in an embodiment of the present invention is obtained Process schematics of the UE in the registration message of former network PS field；

Figure 23 is the method flow diagram 11 that a kind of selection target provided in an embodiment of the present invention shares network C S domains and ps domain operator；

Figure 24 is a kind of communication system schematic diagram one；

Figure 25 is a kind of communication system schematic diagram two；

Figure 26 is a kind of communication system schematic diagram three.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

In existing third generation partner program (English：3rd Generation Partnership Project, referred to as：3GPP) in agreement, the method of network C S domains and ps domain operator is shared there is provided a kind of selection target, its object is to user equipment (UE) to share after network from former network switching to target, the CS domains registered in the shared network of target are consistent with the operator of ps domain.

To be registered in UE in former network C S domains, now switch to target and share network, illustrated exemplified by the target shares the CS domains registration process of network.Target shares the core network element of network after the CS domains login request message of UE transmissions is received, according to the UE carried in the login request message of the CS domains in the allocated CS domain identifiers in the CS domains of former network, if it is determined that the UE is different from the operator that itself is serviced in the operator that the CS domains of former network are registered, the base station for then sharing network to target, which is sent, re-routes order, indicates that the base station reselects CS domain core net network elements for the UE.

The CS domain identifiers and IMSI information for the core network element distribution that the rerouting that the base station is received the carries core network element parsing UE in ordering is registered in former network C S domains, wherein, the CS domain identifiers of the UE include：Temporary Mobile Subscriber Identity (English：Temporary Mobile Subscriber Identity, referred to as：TMSI network resource identifier (the English in)：Network Resource Identifier, referred to as：NRI), Location Area Identification (English Text：Location Area Identity, referred to as：LAI the PLMN mark (English in)：Public land Mobile Network identification, referred to as：PLMN ID) information, the base station can determine the operator that the UE is registered in former network C S domains according to the NRI and PLMNID of the UE, and the operator, when target is shared network and can use, the base station is that the UE selects the corresponding core network element of the operator；If the operator is when the shared network of target is unavailable, then the base station is according to the IMSI information of the UE, predetermined algorithm is used to reselect operator for the UE, and UE CS domains login request message is sent into CS domain core nets network element corresponding to the operator, and indicate that the CS domain core net network elements receive the CS domains login request message.

It is not difficult to draw, differed for UE in the operator that former network PS field and CS domains are registered, and the UE in target shares network at least one available situation in CS domains operator and the ps domain operator of former network registry, UE shares the operator that is registered in network PS field and CS domains in target to be differed.The operator for example registered in former network C S domains is operator one, the operator of former network PS field registration is operator two, and only one of which operator shares network in target and can use, as operator one can use in target shares network, operator two is unavailable in target shares network, then UE shares the operator registered in network C S domains as operator one in target, the operator registered in ps domain is that target shares the base station of network side according to UE IMSI, and default algorithm, selected for the UE, it is probably operator one, it is also possible to be not operator one.

When UE was only registered in former network PS field, UE may be differed in the operator that the shared network PS field of target and CS domains are registered.Operator one is in the operator for example registered, and operator one shares network in target and can use, then UE is still operator one in the ps domain operator that the shared network of target is registered, the operator registered in CS domains is that target shares the base station of network side according to UE IMSI, and default algorithm, selected for the UE, it may be possible to operator one, it is also possible to be not operator one.

In summary, by above-mentioned prior art, do not ensure that UE is identical with PS operators in the CS operators that the shared network of target is registered, i.e. by prior art, still suffer from UE the problem of the operator that target shares network C S domains with ps domain is registered is inconsistent.

To solve the above problems, the embodiment of the present invention, which proposes a kind of selection target, shares network CS domains and ps domain operator method and relevant apparatus, by allow target share network side according to UE former network PS field registration message, be UE selection targets share network CS domains operator；Or be the ps domain operator that UE selection targets share network by allowing target to share network side according to UE in the registration message in former network C S domains, solve UE in the prior art and share the problem of network C S Yu Yu ps domains operator is inconsistent in target.

With reference to Fig. 1, the embodiments of the invention provide a kind of MSC, including：Transmitting element 101；

The transmitting element 101, for switching (English by single wireless voice calling continuity as UE：Single Radio Voice Call Continuity, referred to as：SRVCC) or circuit domain dropping (English：Circuit Switched Fallback, abbreviation CSFB) switch to the shared network of target, the UE is before the CS domain call processes that the target shares network terminate, the TMSI and LAI in CS domains are sent to the UE, wherein, the NRI in CS domains is included in the TMSI, the NRI and the UE in the CS domains are (English in the globally unique temporary mark of former network PS field：Globally Unique Temporary Identity, referred to as：GUTI the mobile management entity coding (English in)：Mobility Management Entity, referred to as：MMEC it is) identical, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in the login request message in the CS domains that the base station that network is shared to the target is sent.

Further, when the first MSC does not store MMEC and PLMN IDs of the UE in former network PS field, to obtain MMEC the and PLMN ID of the UE in former network PS field, the MSC also includes：Receiving unit 102；

The receiving unit 102, for receiving mobile management entity (English：Mobility Management Entity, referred to as：MME) MMEC the and PLMN ID in the GUTI sent, wherein, the MME is the core network element that the UE is registered in former network PS field.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by SRVCC shares network, the ps domain for receiving the MME transmissions switches to the handover request message in CS domains, wherein, MMEC the and PLMN ID in the GUTI are carried in the handover request message.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by SRVCC shares network, the ps domain for receiving the MME transmissions switches to the handover request message in CS domains, wherein, packet TMSI (English of the UE in former network PS field is carried in the handover request message：Packet Temporary Mobile Subscriber Identity, referred to as：P-TMSI) and Routing Area Identifier (English：Routing Area Identity, referred to as：RAI), it is by the GUTI maps that the PLMN ID, the P-TMSI and the RAI carried in the MMEC, the RAI in the GUTI is carried in the P-TMSI.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by CSFB shares network, after the first MSC sends paging request message to the MME, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop carrying MMEC the and PLMN ID in the GUTI in UE described in paging, the business request information.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by CSFB shares network, after the first MSC sends paging request message to the MME, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop UE described in paging, P-TMSIs and RAI of the UE in former network PS field are carried in the business request information, the MMEC is carried in the P-TMSI, the PLMN ID in the GUTI are carried in the RAI, the P-TMSI and the RAI are by the GUTI maps.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by CSFB shares network, receive the caller CSFB instruction message that the MME is sent, wherein, the caller CSFB indicates that message is used to indicate that the subsequently received business request informations of the first MSC are that caused by caller CSFB, the caller CSFB indicates to carry MMEC the and PLMN ID in the GUTI in message.

Optionally, the receiving unit 102 specifically for：

If the UE switches to the target by CSFB shares network, receive the caller CSFB instruction message that the MME is sent, wherein, the caller CSFB indicates that message is used to indicate that the subsequently received business request informations of the first MSC are caused by caller CSFB, the caller CSFB indicates to carry P-TMSIs and RAI of the UE in former network PS field in message, the MMEC is carried in the P-TMSI, the PLMN ID, the P-TMSI and the RAI carried in the RAI in the GUTI is by the GUTI maps.

The embodiments of the invention provide a kind of MSC for the embodiment of the present invention, the MSC is to be located at the first MSC that target shares network, after user equipment (UE) is linked into the CS domains that target shares network by the ps domain of SRVCC or CSFB from former LTE or 4G networks, before the UE end of conversations, first MSC is that the UE reassigns TMSI and LAI, MMECs of the NRI with the UE in the GUTI of former network PS field in the TMSI of the reassignment is identical, and the PLMN ID in LAI are identical with the PLMN ID in the GUTI.Based on this, in UE in the CS domains registration process and ps domain registration process that target shares network, network side can be in the GUTI MMEC and PLMN ID be UE selections identical operator, switched to so as to solve user equipment (UE) in the prior art from LTE or 4G networks by SRVCC or CSFB after shared 2G or 3G network, the inconsistent situation of operators of the UE in CS domains and ps domain.Also, because in the UE communication process, the first MSC is assigned with LAI, the LAI for the UE can just obtain registered PLMN (English comprising PLMN ID, the UE according to the PLMN ID：Registered Public Land Mobile Network, referred to as：RPLMN), so that solve UE in the prior art switches to shared 2G or 3G network from LTE or 4G networks by SRVCC or CSFB, there is no the problem of RPLMN is brought during words.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of UE, with reference to Fig. 2, the UE includes：Receiving unit 201 and transmitting element 202；

The receiving unit 201, for sharing network when the UE switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, receive the TMSI and LAI in the CS domains of the first MSC transmissions of the shared network of target, wherein, the NRI in CS domains is included in the TMSI, MMEC in the GUTI of ps domains of the NRI in the CS domains with the UE in former network is identical, the PLMN ID that the LAI is included in PLMN ID, the LAI are identical with the PLMN ID in the GUTI；

The transmitting element 202, sends in the login request message in CS domains, the login request message in the CS domains for sharing the base station of network to the target and carries the TMSI and the LAI.

The embodiments of the invention provide a kind of user equipment (UE), target shares the CS domains operator and ps domain operator that network shares network according to MMEC and PLMN ID of the UE in the GUTI of former network PS field for the UE selection targets so that UE is identical with ps domain operator in the CS domains operation that target shares network registry.And, due in the UE communication process, first MSC is that the UE is assigned with LAI, PLMN ID are included in the LAI, the UE can just obtain RPLMN according to the PLMN ID, the shared network of target is switched to by SRVCC or CSFB so as to solve UE in the prior art, does not have the problem of RPLMN is brought in communication process.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of mobile management entity MME, with reference to Fig. 3, the MME includes：Transmitting element 301；

The transmitting element 301, for sharing network when user equipment (UE) switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, the first MSC for sharing network to the target sends MMEC the and PLMN ID in the GUTI of ps domains of the UE in former network, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send TMSI and LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the LAI includes PLMN ID, it is described PLMN ID in LAI are identical with the PLMN ID in the GUTI.

The embodiments of the invention provide a kind of MME, target shares the CS domains operator and ps domain operator that network shares network according to MMEC and PLMN ID of the UE in the GUTI of former network PS field for the UE selection targets so that UE is identical with ps domain operator in the CS domains operation that target shares network registry.And, due in the UE communication process, first MSC is that the UE is assigned with LAI, PLMN ID are included in the LAI, the UE can just obtain RPLMN according to the PLMN ID, shared so as to solve UE in the prior art from target is switched to by SRVCC or CSFB after network, there is no the problem of RPLMN is brought in communication process.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of serving GPRS support node of general packet radio service technology (English：Serving GPRS SUPPORT NODE, referred to as：SGSN), with reference to Fig. 4, the SGSN includes：First receiving unit 401, transmitting element 402, the second receiving unit 403 and judging unit 404；

First receiving unit 401, the login request message for receiving the ps domain that the base station of the shared network of the target is sent；

The transmitting element 402, for sending context request message to the first core network element, the context request message carries first and identified, described first identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

Second receiving unit 403, NRI information and PLMN id information of the UE in former network C S domains are carried for receiving in the context request response message that first core network element is sent, the context request response message；

The judging unit 404, for, in the NRI information and PLMN id informations in former network C S domains, judging whether to receive the login request message of the ps domain according to the UE.

Specifically, the judging unit 404 is used for：

Judge that the UE is right in the NRI information in former network C S domains and PLMN id informations institute Whether the operator answered is operator belonging to itself；

If so, receiving the login request message of the ps domain；

The transmitting element 402 is additionally operable to：Sent to the UE and receive response message；

If it is not, the transmitting element 402 is additionally operable to：Send to re-route in message, the rerouting message to the base station and carry IMSI informations of the UE in the NRI information in former network C S domains, PLMN id informations and the UE.

The embodiments of the invention provide a kind of SGSN, the SGSN receives UE after the login request message of ps domain, do not judge whether to receive the login request message of the ps domain or send to the base station that the target shares network to re-route command messages, but obtain NRI and PLMN IDs of the UE in former network C S domains, in follow-up ps domain and CS domains register flow path, it is UE selection identical CS domains and ps domain operator that the target, which shares NRI and PLMN ID of the network element of network according to the UE in former CS domains, it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ so as to solve target in the prior art to share network.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of core network element, the core network element is the UE before the shared network of target is switched to, the core network element registered in former network PS field, with reference to Fig. 5, including receiving unit 501 and transmitting element 502；

The receiving unit 501, the context request message that the first SGSN of network is sent is shared for receiving target, the context request information carries first and identified, and described first identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests；

The transmitting element 502, for first mark in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.

Further, the core network element receives the first SGSN in the receiving unit Before the context request message of transmission, in addition it is also necessary to obtain NRI information and PLMN id information of the UE in former network C S domains, based on this, with reference to Fig. 5, the core network element also includes：Acquiring unit 503；

The acquiring unit 503, for taking the UE in the NRI information and PLMN id informations in former network C S domains.

The embodiments of the invention provide a kind of core network element, so that it is the shared network C S domain operators of UE selection identical targets and ps domain operator that target, which shares NRI and PLMN ID of the network side according to the UE in former network C S domains, so that it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ to solve objective network in the prior art.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of MSC, with reference to Fig. 6, including the first receiving unit 601 and the first judging unit 602；

First receiving unit 601, the login request message for receiving the CS domains that the base station of the shared network of the target is sent；

First judging unit 602, for according to NRI information or MMEC information of the user equipment (UE) in former network PS field for sending CS domains login request message, and PLMN id informations, judging whether to receive the login request message in the CS domains.

Further, if the MSC is not stored with the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations, the MSC also needs to obtain NRI information or MMEC information of the UE in former network PS field, and PLMN id informations, therefore, with reference to Fig. 6, the MSC also includes：Second judging unit 603, the receiving unit 605 of transmitting element 604 and second；

Second judging unit 603, for judging whether the MSC is stored with NRI information or MMEC information of the UE in former network PS field, and PLMN id informations；

The transmitting element 604, the judged result for receiving second judging unit if the judged result, which is the MSC, does not store NRI information or MMEC information of the UE in former network PS field, and PLMN id informations, is then sent out to the second core network element Send context request message, the context request message carries second and identified, described second identifies for representing NRI information or MMEC of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations, wherein, second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains；

Second receiving unit 605, NRI information or MMEC information of the UE in former network PS field, and PLMN id informations are carried for receiving in the context request response message that second core network element is sent, the context request response message.

Specifically, first judging unit 1102 is used for：

Judge NRI information or MMEC information of the UE in former network PS field, and whether the operator corresponding to PLMN id informations is operator belonging to itself；

If so, receiving the login request message in the CS domains；

The transmitting element 1104 is additionally operable to：And receive response message to UE transmissions；

If it is not, the transmitting element 1104 is additionally operable to：Send to re-route in message, the rerouting message to the base station and carry the UE in the NRI information of former network PS field or the IMSI information of MMEC information, PLMN id informations and the UE.

The embodiments of the invention provide a kind of MSC, the MSC receives UE after the login request message in the CS domains in CS domains, do not judge whether to receive the login request message in the CS domains or send to the base station that the target shares network to re-route command messages, but judge registration messages of the UE in former network PS field that itself whether be stored with, if not having, then context request message is sent to the UE core network elements registered in former CS domains, to obtain NRI or MMEC information of the UE in former ps domain, and PLMN id informations, in follow-up CS domains and ps domain register flow path, the network element of the shared network of the target is UE selection identical CS domains and ps domain operator in NRI/MMEC the and PLMN ID of former ps domain according to the UE, it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ so as to solve target in the prior art to share network.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator that network is registered, the embodiments of the invention provide a kind of core network element, the core net Network element is that UE is switched to before the shared network of target, the core network element registered in former network C S domains, and with reference to Fig. 7, the network element includes receiving unit 701 and transmitting element 702；

The receiving unit 701, the context request message that the first MSC of network is sent is shared for receiving target, the context request information carries second and identified, described second identifies the NRI information or MMEC information for representing UE described in the first MSC acquisition requests in former network PS field, and PLMN id informations；

The transmitting element 702, for second mark in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains.

Second core network element, before the receiving unit receives the context request message that the first MSC is sent, in addition it is also necessary to obtain NRI information or MMEC information of the UE in former network PS field, and PLMN id informations, based on this, with reference to Fig. 7, the network element also includes：Acquiring unit 703；

The acquiring unit 703, for obtaining NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.

The embodiments of the invention provide a kind of core network element, so that target share network according to the UE former network PS field NRI or MMEC, and PLMN ID, identical target is selected to share the CS domains operator and ps domain operator of network for the UE, so that it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ to solve target in the prior art to share network.

It should be noted that, with reference to Fig. 8, in the embodiment of all devices of the invention, receiving unit can be realized by receiver 801, transmitting element can be realized by transmitter 802, specifically, also include processor 803, bus 804 and memory 805 in the network element, wherein, the processor 803 calls the instruction in the memory 805 by the bus 804, the content to be sent of transmitter 801 is generated, or the content received to receiver 802 is handled, and realize the function of the unit of other in device.Also, this hair The detail technical features of each bright relevant apparatus refer to the embodiment of method, specifically, being repeated no more in device embodiment.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiment of the present invention proposes a kind of method that selection target shares network C S domains and ps domain operator, this method passes through SRVCC or CSFB technologies applied to UE, the scene of 2G or 3G network is shared from former LTE or 4G network switchings to target, the executive agent of this method is the MSC of CS domain core nets network element the first that target shares 2G or 3G network, with reference to Fig. 9, this method includes：

901, network is shared when UE switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, the target shares the first MSC of network to the TMSI and LAI in UE transmission CS domains, wherein, the NRI in CS domains is included in the TMSI, MMECs of the NRI and the UE in the CS domains in the GUTI that former network packet exchanges ps domain is identical, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, to cause the UE to carry the TMSI and the LAI in the login request message in the CS domains that the base station for sharing network to the target is sent.

When UE needs to share network in target by SRVCC or CSFB callers and conversed, UE assists the UE in the communication process of the shared network of target in the MME that former LTE or 4G networks are registered the first MSC that a target can be selected to share network；When being conversed during UE needs to be called by CSFB and shares network in target, now, the first MSC transmission paging request messages that the network element of network where calling UE can be registered to UE in 2G or 3G network, first MSC can send the paging request message MME registered to the UE, during the called CSFB of UE subsequently, the first MSC assists the UE to complete to share the communication process of network in target.

It should be noted that, if UE switches to the first MSC by SRVCC or CSFB, and UE is before communication process terminates, UE can not share network in target and carry out registration process, only after UE shares the end of conversation of network in target, UE could share network in target and carry out the registration in CS domains and the registration of ps domain.

UE can be largely classified into two kinds in the registration of a network, the first be UE after powering, the attaching process initiated in the CS domains of network and ps domain, another is after UE is starting shooting and completing attaching process, due to the reason such as mobile, need to switch to another network under open state, the location area updating (English initiated in the CS domains of another network：Location Area Identity, referred to as：LAU) Routing Area Update (the English that process and ps domain are initiated：Routing Area Update, referred to as：RAU) process.

By under SRVCC the or CSFB scenes that this law embodiment is applied, the registration that UE shares the CS domains and ps domain of network in target is respectively LAU and RAU processes.When UE is before LAU processes are initiated, first MSC sends TMSI and LAI to the UE, wherein, MMECs of the NRI in the TMSI with the UE in the GUTI for the MME distribution that former LTE or 4G networks are registered is identical, and the PLMN ID in LAI are identical with the PLMN ID in the GUTI.

After UE shares the end of conversation of network in target, UE shares the registration process that network carries out CS domains and ps domain in target, the CS domains login request message that the UE is sent is LAU request messages, the TMSI and LAI of the first MSC distribution are carried in the LAU request messages, the ps domain login request message that UE is sent is RAU request messages, the P-TMSI and RAI that the equivalent mappings of the GUTI are carried in the RAU request messages and are come, wherein, NRI in the P-TMSI is identical with the MMEC in the GUTI, PLMN ID in the RAI are identical with the PLMN ID in the GUTI.That is ps domain NRI and the PLMN ID in CS domains NRI and PLMN ID and RAU in LAU are same operator's distribution, the i.e. operator that UE is registered in former network PS field, it is assumed that be operator one.

Now, base station is received after the LAU request messages of UE transmissions, the NRI and the corresponding relation of operator for judging whether to be stored with entrained in LAU request messages, after the RAU request messages for receiving UE transmissions, the NRI and the corresponding relation of operator for judging whether to be stored with entrained in RAU request messages, because the NRI carried in the LAU request messages is identical with the NRI carried in RAU request messages, if then base station stored has the NRI and operator one corresponding relation, then by the LAU request messages send to the MSC corresponding to the operator one, by the RAU request messages send to the institute of operator one Corresponding SGSN, so that UE is consistent with ps domain operator in the CS domains operator that the shared network of target is registered, all it is operator one.

The NRI and the corresponding relation of operator if base station is not stored with, then base station is received after the LAU request messages that the UE is sent, random, or according to certain strategy, the LAU request messages are sent to a MSC being connected with the base station, it is assumed to be MSC1, base station is received after the RAU request messages that the UE is sent, random, or according to certain strategy, the RAU request messages are sent to a SGSN being connected with the base station, it is assumed that be SGSN1.MSC1 is received after the LAU request messages, NRI and/or PLMN ID according to being carried in the LAU request messages judge the operator for distributing NRI the and PLMN ID whether be itself belonging to operator, if, that is the operator belonging to MSC1 is operator one, then MSC1 receives LAU requests, if not, then sent to base station and re-route order, wherein carry CS domains NRI and the PLMN ID, and send the UE of LAU requests IMSI information, specifically, the IMSI how MSC1 obtains the UE can have various ways, such as directly being obtained to UE, specifically, the embodiment of the present invention is repeated no more to this.

If base station receives the rerouting order of MSC1 transmissions, operator one is in operator of the base station first according to corresponding to NRI the and PLMN ID re-routed in order judge NRI and PLMN ID, and judge whether operator one can use in target shares network, if available, then LAU requests are sent to a MSC corresponding to operator one, if unavailable, then according to the IMSI of the UE, and default algorithm, such as hash algorithm, for one operator of UE gravity treatments, and LAU requests are sent to the MSC corresponding to the operator.

Accordingly, SGSN1 judge with MSC1 identicals.And, if the operator one is unavailable in target shares network, UE IMSI is unique, and base station is CS domains and the ps domain operator according to identical preset algorithm for UE gravity treatments, therefore, base station is that CS domains and the ps domain operator of the gravity treatment of UE institutes also must be identicals.Based on this, UE is necessarily identical in the CS domains operator and ps domain operator that target shares network registry.

Further, in the prior art, UE is after a network registry success, and the core network element registered can distribute PLMN id informations as UE, and the UE is according to the PLMN ID PLMN lists are obtained, as registered PLMN, i.e. RPLMN, network name etc. is correctly shown for follow-up network selection, and in UE sides.

But, in the prior art, when UE by SRVCC or CSFB from former LTE or 4G network switchings to target share network, the UE must be after the shared network C S domain calls of target terminate, the registration process that network carries out CS domains and ps domain could be shared in target, obtain the PLMN ID that the operator registered in the shared network of the target redistributes, and it is disabled that the UE shares network in the RPLMN of former LTE network in target, therefore, network is shared when UE switches to target by SRVCC or CSFB, and before the CS domain call processes that target shares network terminate, the UE shares network without available RPLMN in the target, this will cause some problems, UE does not have network name to show in this stage as described, or, if the UE needs reselecting network after the conversation is over, due to RPLMN can not be used, the foundations of the UE without reselecting network etc..

In the present invention, because UE is before the shared network C S domain calls of target terminate, UE just has been received by the LAI of the first MSC reassignment, PLMN ID are carried in the LAI, the UE is according to the PLMN ID, the available RPLMN in target shares network can be just obtained, so that solve above-mentioned UE shares the problem of being brought before network C S domain call processes terminate without RPLMN in target.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is the first MSC that target shares network C S domains, after user equipment (UE) is linked into the CS domains that target shares network by the ps domain of SRVCC or CSFB from former LTE or 4G networks, before the UE end of conversations, first MSC is that the UE reassigns TMSI and LAI, MMECs of the NRI with the UE in the GUTI of former network PS field in the TMSI of the reassignment is identical, and the PLMN ID in LAI are identical with the PLMN ID in the GUTI.Based on this, in UE in target shares the CS domains registration process or ps domain registration process of network, network side can be that the UE selects identical CS domain operators and ps domain operator according to the MMEC and PLMN ID, so as to solve the UE the problem of target shares the CS domains operator and inconsistent ps domain operator of network registry.Also, because in the UE communication process, the first MSC is that the UE is assigned with LAI, the LAI comprising PLMN ID, The UE can just obtain RPLMN according to the PLMN ID, so that solve UE in the prior art switches to shared 2G or 3G network from LTE or 4G networks by SRVCC or CSFB, not have the problem of RPLMN is brought during words.

Further, in the case where the first MSC is not stored with MMEC and PLMN IDs of the UE in the GUTI that the MME of former network registry is distributed, to solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator of network registry, the embodiment of the present invention additionally provides a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is the first MSC, with reference to Figure 10, this method includes：

1001st, the first MSC receives MMEC the and PLMN ID in the GUTI that MME is sent, wherein, the MME is the core network element that the UE is registered in former network PS field.

Before UE switches to the first MSC, first MSC may get registration messages of the UE on the MME of former LTE or 4G networks, for example, to support CSFB characteristics, UE perform CSFB flows before just combined registering on the MME and another 2G of a LTE or 4G network or the MSC of 3G network, under the scene of combined registering, MME can obtain registration messages of the UE on MSC, that is the MSC that UE is registered is the UE TMSI distributed and LAI, MSC can obtain registration messages of the UE on MME, that is the GUTI that UE is distributed in the MME registered as the UE.During UE carries out CSFB, it may be exactly that the UE shares the MSC that network registry is crossed in target to assist the UE to complete in the first MSC that target shares the call of network, now, first MSC can get registration messages of the UE on former LTE or 4G networks MME, i.e. described MME is the GUTI that the UE is distributed, and the first MSC can obtain MMEC the and PLMN ID in the GUTI.

And, the combined registering is a kind of special circumstances that the UE was registered in former network C S domains and ps domain, the UE may also be registered in former network C S domains and ps domain, but it is not combined registering, hour of log-on is separate, and the ps domain core network element now registered can not know registration letters of the UE on the CS domain core net network elements of registration Breath, the CS domain core nets network element registered can not know log-on messages of the UE on the ps domain core network element of registration.

But, under other scenes, the first MSC can not be directly obtained the log-on message for the MME that the UE is registered in former LTE or 4G networks, i.e., described MME can not be directly obtained the GUTI that the UE is allocated in former network.

In this case, the first MSC is needed in the UE before the CS domain calls that target shares network terminate, MMEC and PLMN id informations of the UE in the GUTI of former network PS field is obtained from the UE in the MME that former network LTE or 4G networks are registered.

1002, network is shared when user equipment (UE) switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, the target shares the first MSC of network to the TMSI and LAI in UE transmission CS domains, wherein, the NRI in CS domains is included in the TMSI, MMECs of the NRI in the CS domains with the UE in the GUTI of former network PS field is identical, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, to cause the UE to carry the TMSI and the LAI in the login request message in the CS domains that the base station for sharing network to the target is sent.

Specifically, the detail technical features of step 1002 can be found in above-mentioned steps 901, the embodiment of the present invention is repeated no more to this.

Further, the method described in above-mentioned steps 901 and step 902 can be divided into three kinds of specific scenes to be described.

The first scene：SRVCC scenes.

When the UE need by SRVCC technologies switch to target share network when, the MME for the former LTE or 4G networks that UE is registered can be according to the interface case of itself or itself selection strategy, the first MSC that selection target shares network assists the UE to complete to share the call of network in target, and initiates the handover request message that ps domain switches to CS domains to the first MSC.MMEC and PLMN IDs of the UE in the GUTI of former network PS field is carried in the handover request message.

Specifically, with reference to Figure 11, including：

1101：The MME that user equipment (UE) is registered in former LTE or 4G networks shares the first MSC of network according to its own interfaces situation or the strategy of itself, selection target.

1102nd, the MME sends the handover request message that ps domain switches to CS domains to the first MSC, wherein, MMEC the and PLMN ID in the GUTI of ps domains of the UE in former network are carried in the handover request message.

Specifically, the MME can be switched in the handover request message in CS domains to the first MSC ps domains sent, directly carry MMEC and PLMN IDs of the UE in the GUTI of former network PS field, the MME can also pass through round-about way, the P-TMSI and RAI of the UE is carried in the handover request message, the MMEC is carried in the P-TMSI, the PLMN ID in the GUTI are carried in the RAI, wherein, the P-TMSI and the RAI be by the GUTI mappings of the UE MME distribution registered in former LTE or 4G networks Lai.

1103rd, the ps domain that the first MSC receiving MME is sent switches to the handover request message in CS domains.

1104th, the first MSC is that the PLMN ID that the UE reassigns in MMEC of the NRI in TMSI and LAI, the TMSI for the UE in the GUTI that former ps domain is allocated, the LAI are the PLMN ID in the GUTI.

Second of scene：User equipment (UE) is used as called triggered CSFB flows.

In this case, with reference to Figure 12, including：

1201st, the first MSC receives the paging request message transmitted by other network elements.

Specifically, other described network elements are the related network elements of the network where calling UE, when the UE as it is called and need to be switched to target by CSFB share network when, the first MSC receives the paging request message that other described network elements are sent.

1202nd, the first MSC sends paging request message to the MME where called UE.

1203rd, the MME forwards the paging request message to the called UE by base station.

1204th, the MME sends business request information to the first MSC, carries MMEC the and PLMN ID of called UE.

The business request information that the MME is sent to the first MSC is used for the connection status for informing called UE described in the first MSC, to cause the first MSC to stop called UE described in paging.

Specifically, the MME can directly carry MMEC and PLMN IDs of the UE in the GUTI of the ps domain of former network in the business request information, the MME can also pass through indirect mode, the P-TMSI and RAI of the UE is carried in the business request information, the MMEC is carried in the P-TMSI, the PLMN ID are carried in the RAI, the P-TMSI and the RAI are by the GUTI maps.

1205th, the called UE sends operation expanding to the MME by base station and asked, and triggers CSFB.

1206th, the first MSC is that the NRI that the called UE is reassigned in TMSI and LAI, the TMSI is identical with the MMEC, and the PLMN ID in the LAI are identical with the PLMN ID in the GUTI.

The third situation：The CSFB flows that UE is triggered as caller.

In this case, with reference to Figure 13, including：

1301st, calling UE sends operation expanding request message to MME, triggers CSFB.

1302nd, MME sends caller CSFB to the first MSC and indicates message, and the caller CSFB indicates to carry MMEC the and PLMN ID in the GUTI of ps domains of the UE in former network in message.

Wherein, the caller CSFB that the MME is sent to the first MSC indicates that message is used to indicate that the subsequently received business request informations of the first MSC are caused by caller CSFB, specifically, the MME directly can indicate to carry MMEC and PLMN IDs of the UE in the GUTI of former ps domain in message in the caller CSFB, certainly, the MME can also be by carrying indirectly method, the ps domain Temporary Mobile Subscriber Identity P-TMSI and Routing Area Identifier RAI of the UE is carried in the caller CSFB indicates message, the MMEC is carried in the P-TMSI, the PLMN ID are carried in the RAI, the P-TMSI and the RAI are by the GUTI maps.

1303rd, the first MSC is that the called UE reassigns TMSI and LAI, institute The NRI stated in TMSI is identical with the MMEC, and the PLMN ID in the LAI are identical with the PLMN ID in the GUTI.

Therefore, in above-mentioned three kinds of scene (SRVCC, called CSFB and caller CSFB) under, the UE is before the CS domain calls that target shares network terminate, i.e. in UE before target shares network initiation CS domains register flow path, it is obtained with TMSI and LAI that the first MSC is reassigned, wherein, MMEC of the NRI information in the CS domains in the TMSI that the first MSC is reassigned to the UE with the UE in the GUTI for the MME distribution that former network PS field is registered is identical, PLMN IDs of the PLMN ID with the UE in the GUTI for the MME distribution that former network PS field is registered in the LAI that first MSC is reassigned to the UE is identical.

The UE is in the location area updating request message that CS domains are initiated, carry TMSI and LAI that the MSC1 is reassigned, the UE is in the Routing Area Update request message that ps domain is initiated, carry P-TMSI and RAI that the UE comes in the GUTI mappings that former ps domain is allocated, wherein, the TMSI is identical with the network resource identifier in CS domains and the network resource identifier of ps domain that are carried in the P-TMSI, all it is the MMEC in the GUTI, the LAI is identical with the PLMN ID carried in the RAI, is all the PLMN ID in the GUTI.

Based on this, if the UE also can use in network is shared in target by the operator that former LTE or 4G networks are registered, then the shared network of target is consistent with the operator of ps domain for the operator in the UE CS domains selected, all it is operators of the UE in the ps domain registered described in former LTE or 4G networks, if the UE is unavailable in network is shared in target by the operator that former LTE or 4G networks are registered, then the shared network of target is consistent with the operator of ps domain for the operator in the UE CS domains selected, all it is that base station passes through preset strategy, and UE IMSI, it is the operator of the UE gravity treatments.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, it is the CS domains operator and ps domain operator that the UE selection targets share network that target, which shares MMEC and PLMN ID of the network in GUTI, so that UE is identical with ps domain operator in the CS domains operation that target shares network registry.Also, because in the UE communication process, the first MSC is that the UE is assigned with LAI, the LAI In RPLMN can just be obtained according to the PLMN ID comprising PLMN ID, the UE so that solve UE in the prior art switches to shared 2G or 3G network from LTE or 4G networks by SRVCC or CSFB, there is no the problem of RPLMN is brought during words.

To solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator of network registry, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is UE, and with reference to Figure 14, this method includes：

1401st, network is shared when user equipment (UE) switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, the TMSI and LAI in the CS domains that the first MSC that the UE receives the shared network of target is sent, wherein, the NRI in CS domains is included in the TMSI, MMEC in the GUTI of ps domains of the NRI in the CS domains with the UE in former network is identical, and the PLMN ID that the LAI is included in PLMN ID, the LAI are identical with the PLMN ID in the GUTI.

1402nd, the UE sends in the login request message in CS domains, the login request message in the CS domains to the base station that the target shares network and carries the TMSI and the LAI.

Specifically, the detail technical features of step 2001 and step 2002 can be found in above-mentioned first MSC embodiment, the embodiment of the present invention is not repeated this.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, it is the CS domains operator and ps domain operator that the UE selection targets share network that target, which shares MMEC and PLMN ID of the network in GUTI, so that UE is identical with ps domain operator in the CS domains operation that target shares network registry.And, due in the UE communication process, first MSC is that the UE is assigned with LAI, PLMN ID are included in the LAI, the UE can just obtain RPLMN according to the PLMN ID, shared 2G or 3G network is switched to by SRVCC or CSFB from LTE or 4G networks so as to solve UE in the prior art, is not having the problem of RPLMN is brought during words.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is that UE is switched to before the shared network of target, in the MME of former LTE or 4G network registries, with reference to Figure 15, this method includes：

1501, network is shared when UE switches to target by SRVCC or CSFB, the UE is before the CS domain call processes that the target shares network terminate, the first MSC that MME shares network to the target sends MMEC the and PLMN ID in the GUTI of ps domains of the UE in former network, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send TMSI and LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI.

Specifically, the detail technical features of the embodiment of the present invention can be found in above-mentioned first MSC embodiment, contrast of the embodiment of the present invention is repeated no more.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, it is that the UE selects identical target to share the CS domains operator and ps domain operator of network that target, which shares MMEC and PLMN ID of the network in GUTI, so as to solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator.And, due in the UE communication process, first MSC is that the UE is assigned with LAI, PLMN ID are included in the LAI, the UE can just obtain RPLMN according to the PLMN ID, shared 2G or 3G network is switched to by SRVCC or CSFB from LTE or 4G networks so as to solve UE in the prior art, is not having the problem of RPLMN is brought during words.

To solve UE the problem of target shares CS domains and the inconsistent ps domain operator of network registry, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, with reference to Figure 16, this method includes：

1601st, the MME that the UE is registered in former network PS field shares network to target The first MSC send MMEC the and PLMN ID distributed in UE GUTI.

1602nd, the first MSC reassigns TMSI and LAI to the UE, wherein, the NRI in the TMSI is identical with the MMEC in the GUTI, and the PLMN ID in the LAI are identical with the PLMN ID in the GUTI.

1603rd, the UE sends the login request message in CS domains to the base station that the target shares network, wherein, the login request message in the CS domains carries the TMSI and LAI of the reassignment, and the login request message in the CS domains is LAU request messages.

It should be noted that the shared network in the application, refers to 2G or 3G network.

1604th, NRI of the base station in the TMSI judges whether the be stored with NRI and the corresponding relation of operator.

Specifically, the base station is received after the LAU request messages, the PLMN id informations in LAI entrained in the request message are not identified, the NRI information in the CS domains in the TMSI can only be recognized, and, which operator the operator that the base station directly can not judge to distribute the CS domains NRI according to the CS domains NRI information is, itself whether the be stored with NRI in the CS domains and the corresponding relation of operator can only be judged according to the NRI information in the CS domains, if having, the base station can judge the operator that UE is registered in former network C S domains according to the corresponding relation, if not having, base station can not judge the operator that UE is registered in former network C S domains.

In some cases, the base station may be stored with the NRI in the CS domains and the corresponding relation of operator, as UE was registered in the CS domains that target shares network, it is operator one to assume registered CS domains operator, operator one is that UE distributes TMSI and LAI, and the base station stored that the target shares network has the CS domains NRI in TMSI and the corresponding relation of operator one.When UE is from LTE the or 4G network switchings of registration to the shared 2G or 3G network, base station receives the LAU request messages of UE transmissions, TMSI and LAI that operator one distributes are carried in the LAU request messages, base station judges be stored with the CS domains NRI in TMSI and the corresponding relation of operator one.

In other cases, the target shares the be not stored with CS domains NRI and the corresponding relation of operator, the i.e. target of base station of network and shares the base station of network and can not judge that CS domains NRI is according to the NRI information in the CS domains in the LAU request messages of the UE Which operator's distribution.

1605th, if so, the login request message in the CS domains is sent twoth MSC corresponding to the operator by the base station.

1606th, the 2nd MSC receives the login request message in the CS domains, and receives response message to UE transmissions.

Specifically, 2nd MSC can obtain the NRI information in the CS domains in the TMSI in the LAU request messages, and the PLMN id informations in the LAI, the MSC1 judges that the NRI information in the CS domains and the PLMN ID are operator's distribution belonging to itself, the MSC1 receives the LAU request messages, is sent to the UE and receives response message.

It should be noted that, because the CS domains NRI and PLMN ID in LAU request messages must be same operator's distribution, the CS domains operator distribution that i.e. described UE is registered in former network, therefore, after the 2nd MSC receives the LAU request messages, whether can only judge CS domains NRI information in LAU request messages is that operator belonging to itself distributes, whether can also only judge the PLMN ID in LAU request messages is the distribution of itself operator, it can also combine and judge whether CS domains NRI and the PLMN ID is itself operator's distribution, specifically, the MSC1 judge CS domains NRI and/or PLMN ID in the LAU request messages whether be own operations business distributed can have various ways, the embodiment of the present invention is repeated no more to this.

If the 1607, not having, the base station sends the login request message in the CS domains to the 3rd MSC being connected with the base station, wherein, the 3rd MSC is the MSC being connected with the base station, and the 3rd MSC is the base station according to preset strategy or randomly selected.

1608th, the NRI in the PLMN ID or TMSI in LAI of the 3rd MSC in the login request message in the CS domains judge the PLMN ID and the corresponding operators of the NRI whether be itself belonging to operator.

1609th, if so, the 3rd MSC receives the login request message in the CS domains, and response message is received to UE transmissions.

1610th, if it is not, the 3rd MSC is sent to the UE re-routes message, Wherein, the information such as NRI, PLMN ID and IMSI of the UE are carried in the rerouting message.

1611st, the base station judges whether the operator corresponding to NRI the and PLMN ID in the rerouting message can use in the target shares network.

Specifically, when the base station can only obtain the NRI information in the CS domains, the NRI in TMSI and the corresponding relation of operator if base station is not stored with, which operator the operator that the base station only can not judge to distribute the NRI information in the CS domains according to the NRI information in the CS domains is, when the base station obtains the NRI information in the CS domains and the PLMN id informations simultaneously, which operator the base station can be with reference to the NRI information in both judgement distribution CS domain and the operator of the PLMN id informations, that is what UE is in the operator that former network C S domains are registered, and the operator shares whether network can use in the target.

If the 1612, can use, the base station sends the login request message in the CS domains to the 4th MSC corresponding to the operator.

For example, the base station is according to the NRI information and the PLMN id informations in the CS domains, judge to distribute the NRI information in the CS domains and the operator of the PLMN id informations for operator one, then the base station sends the LAU request messages to the 4th MSC corresponding to operator one, and the 4th MSC receives the LAU request messages and sent to the UE to receive response message.

4th MSC can be by judging that the operator corresponding to CS domains NRI and PLMN ID in the request message is operator belonging to the 4th MSC and receives the request message, other, the base station can also carry the IMSI of the UE within the message when sending LAU request messages, show to have carried out route flow journey again, IMSIs of 4th MSC in the request message directly receives the request message, or the base station carries the instruction for indicating that the 4th MSC receives the LAU request messages in LAU request messages are sent, it is appreciated that, the process that 4th MSC receives the LAU request messages can have a variety of, the embodiment of the present invention is repeated no more to this.

1613rd, the 4th MSC receives the login request message in the CS domains, and receives response message to UE transmissions.

If the 1614, unavailable, the base station, according to the IMSI of the UE, is described one CS domains operator of UE gravity treatments.

For example, the base station is according to the IMSI of the UE, pass through hash algorithm, for described one CS domains operator of UE gravity treatments, it is assumed to be operator two, and the LAU request messages is sent to the MSC corresponding to the operator, and indicates that the MSC receives the LAU request messages, the MSC receives after LAU request messages, and sending one to UE receives response message

In figure 16, UE is not embodied in the registration process of ps domain, UE is in the ps domain registration process of ps domain, network side is that MMEC the and PLMN ID in the GUTI that the UE is distributed are that the UE selects CS domains operator according to the MME, selection course refers to step 1603 to 1604, unlike, the core network element for receiving the ps domain login request message of the UE is the SGSN that target shares network.

It is that the UE selects identical target to share the CS domains operator and ps domain operator of network that target, which shares MMEC and PLMN ID of the network in GUTI, so as to solve UE the problem of the CS domains provider domain ps domain operation that target shares network registry is inconsistent.And, due in the UE communication process, first MSC is that the UE is assigned with LAI, PLMN ID are included in the LAI, the UE can just obtain RPLMN according to the PLMN ID, shared 2G or 3G network is switched to by SRVCC or CSFB from LTE or 4G networks so as to solve UE in the prior art, is not having the problem of RPLMN is brought during words.

Shared for user equipment (UE) from former network switching to target after network, the problem of operator in the shared network C S domains of the target and ps domain registration is inconsistent, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is the first SGSN that target shares network, the scene of this method application is the scene that user equipment (UE) is crossed in the ps domain and CS domains combined registering of former network, with reference to Figure 17, this method includes：

1701st, target shares the login request message of the ps domain of the base station transmission of the shared network of the first SGSN receptions target of network.

Specifically, the login request message of the ps domain is the UE shares the ps domain login request message that network is sent in target, can be RAU request messages or the Attach Request message of ps domain.

1702nd, the first SGSN sends context request message to the first core network element, the context request message carries first and identified, described first identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field.

After the first SGSN receives the login request message of the ps domain, first SGSN does not judge whether to receive the login request message of the ps domain or send to the base station of the shared network to re-route order, first SGSN sends context request information to first core network element, the context request information carries first and identified, and described first identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests.

It should be noted that the combined registering, refers to user equipment (UE) after the ps domain registration of LTE or 4G networks, the MME triggering 2G or a MSC of 3G network registered completes registration processes of the UE in the 2G or the CS domains of 3G network；Or user equipment (UE) is referred to after the ps domain registration of a 2G or 3G network, the SGSN of the registration triggers CS domain registration processes of the MSC completion UE in the network of the network.In the case of combined registering, the MME or SGSN of combined registering can know registration messages of the UE on MSC, such as MSC is TMSI the and LAI information that UE is distributed, the MSC of combined registering can also obtain registration messages of the UE on MME or SGSN, such as the GUTI that MME is UE distribution, or the P-TMSI and RAI that SGSN is UE distribution.

Specifically, during combined registering, how the CS domain core nets network element registered obtains the registration message of registered ps domain core network element, and how the ps domain core network element registered obtains the registration message of registered CS domain core net network elements, the embodiment of the present invention is repeated no more to this.

1703rd, the first SGSN is received in the context request response message that first core network element is sent, the context request response message and is carried the UE in former network The NRI information and PLMN id informations in CS domains.

1704th, the first SGSN judges whether to receive the login request message of the ps domain according to the UE in the NRI information and PLMN id informations in former network C S domains.

Specifically, the first SGSN judges whether operator corresponding to NRI information and PLMN id informations of the UE in former network C S domains is operator belonging to itself.

If so, the first SGSN receives the login request message of the ps domain, and receive response message to UE transmissions.If it is not, the first SGSN sends to re-route in message, the rerouting message to the base station carries IMSI informations of the UE in the NRI information in former network C S domains, PLMN id informations and the UE.

Specifically, first SGSN sends to the base station and re-routes command messages, to cause the UE of the base station in the rerouting command messages in NRI the and PLMN ID in former CS domains as the corresponding operators of the UE selections NRI and PLMN ID, or the base station is caused to be the UE gravity treatments operator according to the IMSI of the UE.

If it follows that the operator that the UE is registered in former CS domains shares network in target and can use, the UE is in the operator that the operation commercial city that target shares network registry is that the UE is registered in former network C S domains；If it is unavailable that network is shared in target by the operator that the UE is registered in former network C S domains, the UE is that target shares the base station of network according to the IMSI of the UE in the operation commercial city that target shares network registry, and default algorithm, it is the operator of the UE gravity treatments.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, in the method, the first SGSN that target shares the ps domain of network receives UE after the login request message of ps domain, context request message is sent to the first core network element, to obtain NRI and PLMN IDs of the UE in former CS domains, in follow-up ps domain and CS domains register flow path, it is UE selection identical ps domains and CS domains operator that the target, which shares NRI and PLMN ID of the network element of network according to the UE in former CS domains, it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ so as to solve target in the prior art to share network.

Network C S domains and ps domain operation are shared the embodiments of the invention provide a kind of selection target The method of business, the executive agent of this method is the first core network element, and first core network element is that UE is switched to before the shared network of target, the core network element registered in former ps domain, and with reference to Figure 18, this method includes：

1801st, the first core network element receives the context request message that target shares the first SGSN transmissions of network, the context request information carries first and identified, described first identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests, wherein, first core network element is that the UE is switched to before the shared network of target, the core network element registered in former network PS field.

1802nd, first mark of first core network element in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.

Specifically, first core network element before the context request message that the first SGSN is sent is received, it is necessary to obtain NRI information and PLMN id information of the UE in former network C S domains by combined registering.

The detail technical features of the embodiment of the present invention can be found in above-mentioned first SGSN embodiment, and the embodiment of the present invention is repeated no more to this.

The embodiments of the invention provide a kind of core network element, it is the shared network C S domain operators of UE selection identical targets and ps domain operator that target, which shares NRI and PLMN ID of the network side according to the UE in former network C S domains, so that it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ to solve objective network in the prior art.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, with reference to Figure 19, this method includes：

1901st, UE sends the login request message of ps domain to the base station that target shares network, wherein, the login request message of the ps domain is Attach Request message or Routing Area Update RAU request messages.

1902nd, the base station sends the login request message of the ps domain to the target the first SGSN for sharing network.

1903rd, the first SGSN sends context request message to the first core network element, the context request information carries second and identified, and described second identifies for representing NRI information and PLMN id information of the UE in former network C S domains described in the first SGSN acquisition requests.

First core network element can be represented with the 2nd SGSN or MME.

1904th, first core network element sends in context request response message, the context request response message to the first SGSN and carries NRI information and PLMN id information of the UE in former network C S domains.

1905th, the first SGSN judges whether operator corresponding to NRI information and PLMN id informations of the UE in former network C S domains is operator belonging to itself.

1906th, if so, the first SGSN receives the login request message of the ps domain, and response message is received to UE transmissions.

1907th, if it is not, the first SGSN sends to re-route in message, the rerouting message to the base station carries IMSI informations of the UE in the NRI information in former network C S domains, PLMN id informations and the UE.

1908th, the base station judges whether operator corresponding to the NRI and PLMN ID is operator that the target shares network.

1909th, if so, the base station, which is the UE, selects the 3rd SGSN corresponding to the operator, and the login request message of the ps domain is sent to the 3rd SGSN.

1910th, the 3rd SGSN receives the login request message of the ps domain and sent to the UE to receive response message.

1911st, it is the UE gravity treatments ps domain operator if it is not, the base station is according to the IMSI of the UE.

Specifically, embodiment of the step 1901 to step 1911, reference can be made to above-mentioned first SGSN embodiment, the embodiment of the present invention is repeated no more to this.

In Figure 19, registration processes of the UE in CS domains is not embodied, and UE is in target In the CS domains registration process of shared network, it is UE selection CS domains operator that target, which shares NRI information and PLMN id information of the network according to the UE in former network C S domains,.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, pass through this method, NRI and PLMN ID of the base station according to the UE in former CS domains for the UE selects identical CS domain operators and ps domain operator, so that solving objective network in the prior art is the selected CS domains of user equipment (UE) and the problem of ps domain operator is possible to inconsistent.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is the first MSC that target shares network, with reference to Figure 20, this method includes：

2001st, target shares the login request message in the CS domains of the base station transmission of the shared network of the first MSC receptions target of network.

Specifically, the login request message in the CS domains is the UE shares the CS domains login request message that network is sent in target, can be the Attach Request message in LAU request messages or CS domains.

2002nd, the first MSC exchanges the NRI information or MMEC information of ps domain, and PLMN id informations according to the user equipment (UE) for sending CS domains login request message in former network packet, judges whether to receive the login request message in the CS domains.

It should be noted that because LTE or 4G networks are just in first stage of construction, therefore, generally, LTE or 4G networks only support data service, and the talk business of user still needs to return to traditional 2G or 3G network is carried out.Now, there is such case, UE may a LTE or 4G network MME, and shared a 2G or 3G network MSC combined registering mistakes, registration when, the MME registered distributes GUTI as UE, the MSC registered distributes TMSI and LAI as UE, wherein, CS domains NRI information is included in TMSI, the base station of network can store the NRI and MSC operators corresponding relation where including PLMN id informations, MSC in LAI.After UE is from LTE the or 4G network switchings to the 2G or 3G network registered, CS domains and ps domain are initiated in the network Registration process, after base station receives the CS domains login request message, NRI information in TMSI, it may determine that the NRI and the corresponding relation of operator, and send the CS domains login request message to the MSC corresponding to the operator, that is, the first MSC for receiving the CS domains registration information of UE transmissions may be before exactly UE in the MSC registered.

Now, first MSC is received after the CS domains login request message of UE transmissions, due to during combined registering, first MSC has got registration messages of the UE on MME, that is MME is MMEC the and PLMN ID in the GUTI that UE is distributed, first MSC judges whether to receive the CS domains login request message of UE transmissions according to MMEC the and PLMN ID.

Specifically, the first MSC judge the UE former network PS field=MMEC information, and whether operator corresponding to PLMN id informations is operator belonging to itself；

If so, the first MSC receives the login request message in the CS domains, and receive response message to UE transmissions；

If it is not, the first MSC sends to re-route in message, the rerouting message to the base station carries international mobile subscriber identity IMSI informations of the UE in the MMEC information of former network PS field, PLMN id informations and the UE.

Further, under other scenes, or under above-mentioned scene, but receive the MSC of combined registering before the first MSC is not UE, then the first MSC after CS domains registration request is received, it is necessary to MSC acquisitions UE register in former network C S domains to UE former network PS field NRI or MMEC information, and PLMN id informations, specifically, acquisition process can be found in Figure 21, including：

2101st, the first MSC judges whether NRI information or MMEC information of the UE in former network PS field that is stored with, and PLMN id informations.

If the 2102, not having, first MSC sends context request message to the second core network element, the context request message carries second and identified, described second identifies for representing NRI information or MMEC of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations, wherein, second core network element is described UE is before the shared network of the target is switched to, the core network element registered in former network C S domains.

After the first MSC receives the login request message in the CS domains, first MSC does not judge whether to receive the login request message in the CS domains or send to the base station that the target shares network to re-route order, first MSC judges NRI information or MMEC information of the UE in former network PS field that is not stored with, and after PLMN id informations, first MSC sends context request information to second core network element, the context request information carries second and identified, described second identifies for representing NRI information or MMEC information of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations.

2103rd, the first MSC is received in the context request response message that second core network element is sent, the context request response message and is carried NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.

Because UE is in the case of the CS domains of former network and ps domain combined registering, second core network element can get the registration message on MME or SGSN that the UE registers in former network PS field, i.e., described second core network element can get the UE in the MME of the former network registry GUTI distributed or the P-TMSI and RAI of SGSN distribution.

Second core network element can be according to the described second mark, a context request response message is sent to the first MSC, P-TMSI and RAI information of the UE in former network PS field, or MMEC the and PLMN id informations in GUTI are carried in the context request response message.

Further, the first MSC judges NRI information or MMEC information of the UE in former network PS field, and whether the operator corresponding to PLMN id informations is operator belonging to itself.

If so, the first MSC receives the login request message in the CS domains, and receive response message to UE transmissions.

If it is not, the first MSC sends to re-route in message, the rerouting message to the base station carries the UE in the NRI information of former network PS field or the IMSI information of MMEC information, PLMN id informations and the UE.

Specifically, first MSC sends to the base station and re-routes command messages, to cause the UE of the base station in the rerouting command messages in the NRI information or MMEC information of former network PS field, and PLMN ID are that the UE selects corresponding operator, or the base station is caused to be the UE gravity treatments operator according to the IMSI of the UE.

If it follows that the UE shares in the operator that former ps domain is registered in target, network is available, and the shared network of the target is the operator that the UE is registered in former network PS field by the UE operators selected in CS domains and in the operation commercial city that ps domain is selected；If the UE is unavailable in the shared network of target in the operator that former network PS field is registered, the base station no matter UE CS domains registration process, or in the ps domain registration process of the UE, will be that the UE reselects operator according to the IMSI of the UE, because UE IMSI is unique, reselection strategies are consistent (being for example all IMSI hash algorithms), therefore the ps domain of gravity treatment with the operator in CS domains is also consistent.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, in the method, the first MSC that target shares the ps domain of network receives UE after the login request message in the CS domains in CS domains, judge registration messages of the UE in former network PS field that itself whether be stored with, if not having, then context request message is sent to the second core network element, to obtain NRI or MMEC information of the UE in former ps domain, and PLMN id informations, in follow-up CS domains and ps domain register flow path, the network element of the shared network of the target is UE selection CS domain operators and ps domain operator in NRI/MMEC the and PLMN ID of former network PS field according to the UE, so that UE is identical in the operator that target shares network registry, all it is the operator registered in former network PS field, or all be target share network base station be the UE gravity treatments operator.It is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ so as to solve target in the prior art to share network.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, the executive agent of this method is the second core network element, wherein Second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains, and with reference to Figure 22, this method includes：

2201st, the second core network element that network sends the login request message in CS domains is shared in target, receive target and share the context request message that the first MSC of network is sent, the context request information carries second and identified, described second identifies the NRI information or MMEC information for representing UE described in the first MSC acquisition requests in former network PS field, and PLMN id informations.

2202nd, second mark of second core network element in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains.

Specifically, second core network element is before the context request message is received, registration messages of the UE in former network PS field is got during combined registering, the PLMN id informations in NRI information and RAI in MMEC and PLMN id informations in the GUTI that the MME registered distributes as UE, or the P-TMSI that are distributed as UE of the SGSN registered.

Specifically, the detail technical features of the embodiment of the present invention can be found in the embodiment of the first MSC corresponding to above-mentioned Figure 21, the embodiment of the present invention is repeated no more to this.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, target share network according to the UE former network PS field NRI or MMEC, and PLMN ID, identical target is selected to share the CS domains operator and ps domain operator of network for the UE, so that it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ to solve target in the prior art to share network.

To solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, the embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, with reference to Figure 23, this method includes：

2301st, user equipment (UE) sends the login request message in CS domains to the base station that target shares network, wherein, the login request message in the CS domains is Attach Request message or LAU request messages.

2302nd, the base station sends the login request message in the CS domains to the target the first MSC for sharing network.

2303rd, the first MSC judges whether registration messages of the UE in former network PS field that be stored with, if not having, first MSC sends context request message to the second core network element, the context request information carries first and identified, described first identifies NRI the or MMEC information for representing UE described in the first MSC acquisition requests in former network PS field, and PLMN id informations.

In embodiments of the present invention, second core network element is represented with the 2nd MSC.

2304th, second core network element sends in context request response message, the context request response message to the first MSC and carries NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.

2305th, the first MSC judges NRIs or MMEC of the UE in former network PS field, and whether the operator corresponding to PLMN id informations is operator belonging to itself.

2306th, if so, the first MSC receives the login request message in the CS domains, and response message is received to UE transmissions.

2307th, if it is not, the first MSC sends to re-route in message, the rerouting message to the base station carries the UE in the NRI of former network PS field or MMEC, PLMN id information and the UE IMSI information.

2308th, the base station judges the NRI or MMEC, and whether the operator corresponding to the PLMN ID is operator that the target shares network.

2309th, if so, the base station, which is the UE, selects the 3rd MSC corresponding to the operator, and the login request message in the CS domains is sent to the 3rd MSC.

2310th, the 3rd MSC receives the login request message in the CS domains and sent to the UE to receive response message.

2311st, it is the UE weights if it is not, the base station is according to the IMSI of the UE Select CS domains operator.

Specifically, embodiment of the step 2301 to step 2311, reference can be made to above-mentioned first MSC embodiment, the embodiment of the present invention is repeated no more to this.

In embodiment shown in Figure 23 represent UE target share network ps domain registration process, specifically, target share network side according to the UE former network PS field NRI or MMEC, and PLMN ID be the UE select ps domain operator.

The embodiments of the invention provide a kind of method that selection target shares network C S domains and ps domain operator, target share network according to the UE former network PS field NRI or MMEC, and PLMN ID, identical target is selected to share the CS domains operator and ps domain operator of network for the UE, so that it is the problem of CS domains operator and ps domain operator that user equipment (UE) is selected are possible to differ to solve target in the prior art to share network.

Further, to solve UE the problem of the CS domains operator that target shares network registry is inconsistent with ps domain operator, with reference to Figure 24, the embodiments of the invention provide a kind of communication system, the system is applied to UE and switches to the scene that target shares network by SRVCC or CSFB, specifically, it can be overlapping that the LTE/4G networks and the target, which share network, can also be nonoverlapping, the embodiment of the present invention is not limited this.

The communication system includes MSC, UE and MME.The detail technical features of MSC in this communication system can be found in the embodiment corresponding to any width in Fig. 1 and Fig. 9-Figure 13, UE detail technical features can be found in the embodiment corresponding to any width in Fig. 2 and Figure 14, MME detail technical features can be found in the embodiment corresponding to any width in Fig. 3 and Figure 15, and the embodiment of the present invention is repeated no more to this.

Optionally, with reference to Figure 25, the embodiment of the present invention additionally provides a kind of communication system, the communication system includes the SGSN and the first core network element that target shares network, first core network element is that the UE is switched to before the shared network of target, the core network element registered in former network PS field, the system is applied to scenes of the UE in former network C S domains domain ps domain combined registering.

Specifically, the detail technical features of the SGSN can be found in the embodiment corresponding to any width in Fig. 4 and Figure 17, the detail technical features of second core network element can be found in figure Embodiment in 5 and Figure 18 corresponding to any width, the embodiment of the present invention is repeated no more to this.

Optionally, with reference to Figure 26, the embodiment of the present invention additionally provides a kind of communication system, and the communication system applications are in UE in former network C S domains and the scene of ps domain combined registering, and the communication system includes：MSC and the second core network element.Specifically, in the communication system that Figure 26 is described, the shared network of former network and target can be with overlapping, can not also be overlapping, and the embodiment of the present invention is not limited this.

Specifically, the detail technical features of the MSC can be found in the embodiment corresponding to any width in Fig. 6, Figure 20 and Figure 21, the detail technical features of second core network element can be found in the embodiment corresponding to any width in Fig. 7 and Figure 22, and the embodiment of the present invention is repeated no more to this.

The embodiments of the invention provide a kind of communication system, by UE former network PS field log-on message, including ps domain NRI or MMEC, and PLMN ID are the CS domains operator and ps domain operator that the UE selection targets share network, or by UE former network C S domains log-on message, including CS domains NRI and PLMN ID, the CS domains operator and ps domain operator of network are shared for the UE selection targets, so that UE is identical with ps domain operator in the CS domains operator that target shares network registry, so as to solve UE the problem of target shares the CS domains operator and inconsistent ps domain operator of network registry.

It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims (41)

1. A kind of moving exchanging center MSC, it is characterised in that the MSC includes：Transmitting element；

   The transmitting element, for sharing network when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in CS domains are sent to the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique temporary mark GUTI that former network packet exchanges ps domain is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in the login request message in the CS domains that the base station that network is shared to the target is sent.
2. MSC according to claim 1, it is characterised in that the MSC also includes：Receiving unit；

   The receiving unit, MMEC the and PLMN ID in the GUTI for receiving mobile management entity MME transmission, wherein, the MME is the core network element that the UE is registered in former network PS field.
3. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by SRVCC shares network, the ps domain for receiving the MME transmissions switches to the handover request message in CS domains, wherein, MMEC the and PLMN ID in the GUTI are carried in the handover request message.
4. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by SRVCC shares network, the ps domain for receiving the MME transmissions switches to the handover request message in CS domains, wherein, packet TMSI P-TMSIs and Routing Area Identifier RAI of the UE in former network PS field are carried in the handover request message, the MMEC, institute are carried in the P-TMSI It is by the GUTI maps to state the PLMN ID, the P-TMSI and the RAI carried in RAI in the GUTI.
5. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by CSFB shares network, after the first MSC sends paging request message to the MME, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop carrying MMEC the and PLMN ID in the GUTI in UE described in paging, the business request information.
6. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by CSFB shares network, after the first MSC sends paging request message to the MME, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop UE described in paging, P-TMSIs and RAI of the UE in former network PS field are carried in the business request information, the MMEC is carried in the P-TMSI, the PLMN ID in the GUTI are carried in the RAI, the P-TMSI and the RAI are by the GUTI maps.
7. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by CSFB shares network, receive the caller CSFB instruction message that the MME is sent, wherein, the caller CSFB indicates that message is used to indicate that the subsequently received business request informations of the first MSC are that caused by caller CSFB, the caller CSFB indicates to carry MMEC the and PLMN ID in the GUTI in message.
8. MSC according to claim 2, it is characterised in that the receiving unit specifically for：

   If the UE switches to the target by CSFB shares network, the caller CSFB instruction message that the MME is sent is received, wherein, the caller CSFB indicates that message is used to refer to Show that the subsequently received business request informations of the first MSC are caused by caller CSFB, the caller CSFB indicates to carry P-TMSIs and RAI of the UE in former network PS field in message, the MMEC is carried in the P-TMSI, the PLMN ID, the P-TMSI and the RAI carried in the RAI in the GUTI is by the GUTI maps.
9. A kind of user equipment (UE), it is characterised in that the UE includes：Receiving unit and transmitting element；

   The receiving unit, for sharing network when the UE switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, receive the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI of the circuit-switched CS domain of the first moving exchanging center MSC transmission of the shared network of target, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique Temporary Mobile GUTI of the packet switched ps domain of former network is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

   The transmitting element, sends in the login request message in CS domains, the login request message in the CS domains for sharing the base station of network to the target and carries the TMSI and the LAI.
10. A kind of mobile management entity MME, it is characterised in that the MME includes：Transmitting element；

    The transmitting element, for sharing network when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the first moving exchanging center MSC for sharing network to the target sends mobile management entity coding MMECs and PLMN mark PLMN ID of the UE in the globally unique Temporary Mobile Subscriber Identity GUTI of the packet switched ps domain of former network, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send the interim shifting that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE Employ family mark TMSI and Location Area Identification LAI, wherein, network resource identifier NRI, the NRI in the CS domains comprising CS domains are identical with the MMEC in the GUTI in the TMSI, the PLMN ID that the LAI is included in PLMN ID, the LAI are identical with the PLMN ID in the GUTI.
11. A kind of serving GPRS support node SGSN of general packet radio service technology, it is characterised in that the SGSN includes：First receiving unit, transmitting element, the second receiving unit and judging unit；

    First receiving unit, the login request message for receiving the packet switched ps domain that the base station of the shared network of the target is sent；

    The transmitting element, for sending context request message to the first core network element, the context request message carries first and identified, described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

    Second receiving unit, NRI information and PLMN id information of the UE in former network C S domains are carried for receiving in the context request response message that first core network element is sent, the context request response message；

    The judging unit, for, in the NRI information and PLMN id informations in former network C S domains, judging whether to receive the login request message of the ps domain according to the UE.
12. SGSN according to claim 11, it is characterised in that the judging unit specifically for：

    Whether judge the operator corresponding to NRI information and PLMN id informations of the UE in former network C S domains is operator belonging to itself；

    If so, receiving the login request message of the ps domain；

    The transmitting element is additionally operable to：Sent to the UE and receive response message；

    If it is not, the transmitting element is additionally operable to：Send to re-route in message, the rerouting message to the base station and carry international mobile subscriber identity IMSI informations of the UE in the NRI information in former network C S domains, PLMN id informations and the UE.
13. A kind of core network element, including receiving unit and transmitting element；

    The receiving unit, for receiving the context request message that the serving GPRS support node SGSN for the first general packet radio service technology that target shares network is sent, the context request information carries first and identified, and described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network；

    The transmitting element, for first mark in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.
14. Network element according to claim 13, it is characterised in that the network element also includes：Acquiring unit；

    The acquiring unit, for taking the UE in the NRI information and PLMN id informations in former network C S domains.
15. A kind of moving exchanging center MSC, it is characterised in that the MSC includes the first receiving unit and the first judging unit；

    First receiving unit, the login request message for receiving the circuit-switched CS domain that the base station of the shared network of the target is sent；

    First judging unit, network resource identifier NRI information or mobile management entity coding MMEC information for exchanging ps domain in former network packet according to the user equipment (UE) for sending CS domains login request message, and PLMN mark PLMN id informations, judge whether to receive the login request message in the CS domains.
16. MSC according to claim 15, it is characterised in that the MSC also includes：Second judging unit, transmitting element and the second receiving unit；

    Second judging unit, for judging whether the MSC is stored with NRI information or MMEC information of the UE in former network PS field, and PLMN id informations；

    The transmitting element, the judged result for receiving second judging unit, if the judged result is the MSC do not store the UE in the NRI information of former network PS field or MMEC information, and PLMN id informations, then context request message is sent to the second core network element, the context request message carries second and identified, described second identifies the NRI information or MMEC for representing UE described in the first MSC acquisition requests in former network PS field, and PLMN id informations, wherein, second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains；

    Second receiving unit, NRI information or MMEC information of the UE in former network PS field, and PLMN id informations are carried for receiving in the context request response message that second core network element is sent, the context request response message.
17. MSC according to claim 15 or 16, it is characterised in that first judging unit specifically for：

    Judge NRI information or MMEC information of the UE in former network PS field, and whether the operator corresponding to PLMN id informations is operator belonging to itself；

    If so, receiving the login request message in the CS domains；

    The transmitting element is additionally operable to：And receive response message to UE transmissions；

    If it is not, the transmitting element is additionally operable to：Send to re-route in message, the rerouting message to the base station and carry the UE in the NRI information of former network PS field or the international mobile subscriber identity IMSI information of MMEC information, PLMN id informations and the UE.
18. A kind of core network element, it is characterised in that the network element includes receiving unit and transmitting element；

    The receiving unit, the context request message that the first moving exchanging center MSC of network is sent is shared for receiving target, the context request information carries second and identified, described second identifies for representing that UE described in the first MSC acquisition requests exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain, and PLMN mark PLMN id informations in former network packet；

    The transmitting element, for second mark in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in former network PS The NRI information or MMEC information in domain, and PLMN id informations judge whether to receive the login request message in the CS domains.
19. Network element according to claim 18, it is characterised in that the network element also includes：Acquiring unit；

    The acquiring unit, for obtaining NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.
20. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the target shares the first moving exchanging center MSC of network to the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in UE transmission CS domains, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique temporary mark GUTI that former network packet exchanges ps domain is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in the login request message in the CS domains that the base station that network is shared to the target is sent.
21. Method according to claim 20, it is characterised in that the first moving exchanging center MSC of the shared network of the target is sent to the UE before the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI in CS domains, and this method also includes：

    First MSC receives MMEC the and PLMN ID in the GUTI that mobile management entity MME is sent, wherein, the MME is the core network element that the UE is registered in former network PS field.
22. Method according to claim 21, it is characterised in that MMEC the and PLMN ID that the first MSC is received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by SRVCC shares network, the ps domain that the first MSC receptions MME is sent switches to the handover request message in CS domains, wherein, institute State MMEC the and PLMN ID carried in handover request message in the GUTI.
23. Method according to claim 21, it is characterised in that MMEC the and PLMN ID that the first MSC is received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by SRVCC shares network, the ps domain that the first MSC receptions MME is sent switches to the handover request message in CS domains, wherein, packet TMSI P-TMSIs and Routing Area Identifier RAI of the UE in former network PS field are carried in the handover request message, the MMEC is carried in the P-TMSI, the PLMN ID, the P-TMSI and the RAI carried in the RAI in the GUTI is by the GUTI maps.
24. Method according to claim 21, it is characterised in that MMEC the and PLMN ID that the first MSC is received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by CSFB shares network, first MSC to the MME after paging request message is sent, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop carrying MMEC the and PLMN ID in the GUTI in UE described in paging, the business request information.
25. Method according to claim 21, it is characterised in that MMEC the and PLMN ID that the first MSC is received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by CSFB shares network, first MSC to the MME after paging request message is sent, receive the business request information that the MME is sent, wherein, the business request information is used for the connection status for representing the UE, to cause the first MSC to stop UE described in paging, P-TMSIs and RAI of the UE in former network PS field are carried in the business request information, the MMEC is carried in the P-TMSI, the PLMN ID in the GUTI are carried in the RAI, the P-TMSI and the RAI are by the GUTI maps.
26. Method according to claim 21, it is characterised in that the first MSC MMEC the and PLMN ID received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by CSFB shares network, first MSC receives the caller CSFB instruction message that the MME is sent, wherein, the caller CSFB indicates that message is used to indicate that the subsequently received business request informations of the first MSC are that caused by caller CSFB, the caller CSFB indicates to carry MMEC the and PLMN ID in the GUTI in message.
27. Method according to claim 21, it is characterised in that MMEC the and PLMN ID that the first MSC is received in the GUTI that mobile management entity MME is sent are specifically included：

    If the UE switches to the target by CSFB shares network, first MSC receives the caller CSFB instruction message that the MME is sent, wherein, the caller CSFB indicates that message is used to indicate that the subsequently received business request informations of the first MSC are caused by caller CSFB, the caller CSFB indicates to carry P-TMSIs and RAI of the UE in former network PS field in message, the MMEC is carried in the P-TMSI, the PLMN ID, the P-TMSI and the RAI carried in the RAI in the GUTI is by the GUTI maps.
28. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI for the circuit-switched CS domain that the first moving exchanging center MSC that the UE receives the shared network of target is sent, wherein, the network resource identifier NRI in CS domains is included in the TMSI, mobile management entity coding MMECs of the NRI and the UE in the CS domains in the globally unique Temporary Mobile GUTI of the packet switched ps domain of former network is identical, the LAI includes PLMN mark PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI；

    The UE sends the login request message in CS domains to the base station that the target shares network, The TMSI and the LAI are carried in the login request message in the CS domains.
29. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    Network is shared when user equipment (UE) switches to target by single wireless voice calling continuity SRVCC or circuit domain dropping CSFB, the UE is before the circuit-switched CS domain communication process that the target shares network terminates, the first moving exchanging center MSC that mobile management entity MME shares network to the target sends mobile management entities of the UE in the globally unique Temporary Mobile Subscriber Identity GUTI of the packet switched ps domain of former network and encodes MMEC and PLMN mark PLMN ID, wherein, the MME is the core network element that the UE is registered in the ps domain of former network, to cause the first MSC to send Temporary Mobile Subscriber Identity TMSI and Location Area Identification LAI that UE described in the forward direction of the login request message in CS domains sends CS domains in the UE, wherein, the network resource identifier NRI in CS domains is included in the TMSI, the NRI in the CS domains is identical with the MMEC in the GUTI, the LAI includes PLMN ID, PLMN ID in the LAI are identical with the PLMN ID in the GUTI.
30. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    The login request message for the packet switched ps domain that the base station that target shares the shared network of the serving GPRS support node SGSN receptions target of the first general packet radio service technology of network is sent；

    First SGSN sends context request message to the first core network element, the context request message carries first and identified, described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

    First SGSN is received in the context request response message that first core network element is sent, the context request response message and is carried NRI information and PLMN id information of the UE in former network C S domains；

    First SGSN, in the NRI information and PLMN id informations in former network C S domains, judges whether to receive the login request message of the ps domain according to the UE.
31. Method according to claim 30, it is characterised in that the first SGSN, in the NRI information and PLMN id informations in former network C S domains, judges whether that the login request message for receiving the ps domain is specifically included according to the UE：

    First SGSN judges whether operator corresponding to NRI information and PLMN id informations of the UE in former network C S domains is operator belonging to itself；

    If so, the first SGSN receives the login request message of the ps domain, and receive response message to UE transmissions；

    If not, first SGSN sends to re-route in message, the rerouting message to the base station that the target shares network carries international mobile subscriber identity IMSI informations of the UE in the NRI information in former network C S domains, PLMN id informations and the UE.
32. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    First core network element receives the context request message that the serving GPRS support node SGSN for the first general packet radio service technology that target shares network is sent, the context request information carries first and identified, described first identifies for representing that UE described in the first SGSN acquisition requests exchanges the network resource identifier NRI information and PLMN mark PLMN id informations in CS domains in former lattice network, wherein, first core network element is that the UE is switched to before the shared network of the target, the core network element registered in former network PS field；

    First mark of first core network element in the context request message, context request response message is sent to the first SGSN, NRI information and PLMN id information of the UE in former network C S domains are carried in the context request response message, to cause NRI information and PLMN id information of the first SGSN according to the UE in former network C S domains to judge whether to receive the registration information of the ps domain.
33. Method according to claim 32, it is characterised in that before the context request message that the serving GPRS support node SGSN that first core network element receives the first general packet radio service technology that target shares network is sent, this method also includes：

    First core network element obtain the UE in the NRI information in former network C S domains and PLMN id informations.
34. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    The login request message for the circuit-switched CS domain that the base station that target shares the shared network of the first moving exchanging center MSC reception target of network is sent；

    First MSC exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain according to the user equipment (UE) for sending CS domains login request message in former network packet, and PLMN mark PLMN id informations, judge whether to receive the login request message in the CS domains.
35. Method according to claim 34, it is characterized in that, first MSC exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain according to the user equipment (UE) for sending CS domains login request message in former network packet, and PLMN mark PLMN id informations, before the login request message for judging whether to receive the CS domains, this method also includes：

    First MSC judges whether NRI information or MMEC information of the UE in former network PS field that is stored with, and PLMN id informations；

    If not having, first MSC sends context request message to the second core network element, the context request message carries second and identified, described second identifies for representing NRI information or MMEC of the UE in former network PS field described in the first MSC acquisition requests, and PLMN id informations, wherein, to be the UE switching to before the target shares network second core network element, the core network element registered in former network C S domains；

    First MSC is received in the context request response message that second core network element is sent, the context request response message and is carried NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.
36. Method according to claim 34 or 35, it is characterized in that, first MSC exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain according to the user equipment (UE) for sending CS domains login request message in former network packet, and PLMN mark PLMN id informations, judge whether that the login request message for receiving the CS domains is specifically included：

    First MSC judges NRI information or MMEC information of the UE in former network PS field, and whether the operator corresponding to PLMN id informations is operator belonging to itself；

    If so, the first MSC receives the login request message in the CS domains, and receive response message to UE transmissions；

    If it is not, the first MSC sends to re-route in message, the rerouting message to the base station carries the UE in the NRI information of former network PS field or the international mobile subscriber identity IMSI information of MMEC information, PLMN id informations and the UE.
37. A kind of method that selection target shares network C S domains and ps domain operator, it is characterised in that this method includes：

    Second core network element receives target and shares the context request message that the first moving exchanging center MSC of network is sent, the context request information carries second and identified, described second identifies for representing that the first MSC acquisition requests user equipment (UE) exchanges the network resource identifier NRI information or mobile management entity coding MMEC information of ps domain in former network packet, and PLMN mark PLMN id informations, wherein, second core network element, which is the UE, to be switched to before the target shares network, the core network element registered in former network C S domains；

    Second mark of second core network element in the context request message, context request response message is sent to the first MSC, NRI information or MMEC information of the UE in former network PS field are carried in the context request response message, and PLMN id informations, to cause the first MSC according to the UE in the NRI information or MMEC information of former network PS field, and PLMN id informations judge whether to receive the login request message in the CS domains.
38. Method according to claim 37, it is characterised in that second core network element is received before the context request message of the first moving exchanging center MSC transmission that target shares network, and this method also includes：

    Second core network element obtains NRI information or MMEC information of the UE in former network PS field, and PLMN id informations.
39. A kind of communication system, it is characterised in that the communication system includes：Moving exchanging center MSC as described in claim any one of 1-8 and the user as described in claim 9 set For the mobile management entity MME described in UE and claim 10.
40. A kind of communication system, it is characterised in that the communication system includes：The serving GPRS support node SGSN of general packet radio service technology as described in claim 11 or 12, and the core network element described in claim 13 or 14.
41. A kind of communication system, it is characterised in that the communication system includes：Moving exchanging center MSC as described in claim any one of 15-17, and/or the core network element described in claim 18 or 19.