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WO2016041208A1 - Procede et appareil associe pour la selection d'operateurs de domaine a commutation de circuits et de domaine a commutation de paquets de reseau de partage cible - Google Patents

Procede et appareil associe pour la selection d'operateurs de domaine a commutation de circuits et de domaine a commutation de paquets de reseau de partage cible Download PDF

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Publication number
WO2016041208A1
WO2016041208A1 PCT/CN2014/086962 CN2014086962W WO2016041208A1 WO 2016041208 A1 WO2016041208 A1 WO 2016041208A1 CN 2014086962 W CN2014086962 W CN 2014086962W WO 2016041208 A1 WO2016041208 A1 WO 2016041208A1
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WIPO (PCT)
Prior art keywords
domain
network
information
plmn
msc
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PCT/CN2014/086962
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English (en)
Chinese (zh)
Inventor
崇卫微
吴晓波
舒林
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2014/086962 priority Critical patent/WO2016041208A1/fr
Priority to CN201480082075.7A priority patent/CN106688281A/zh
Publication of WO2016041208A1 publication Critical patent/WO2016041208A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and related apparatus for selecting a CS domain and a PS domain operator of a target shared network.
  • a traditional network In a traditional network (only one carrier in the network), one carrier can provide users with circuit switching (English: Circuit Switching, CS for short) and packet switching (English: Packet Switching, PS for short). That is, the CS domain operator and the PS domain operator serving the user are always the same.
  • User Equipment English: User Equipment, UE for short
  • a traditional second-generation mobile phone communication technology English: 2-Generation wireless telephone technology, 2G for short
  • traditional third-generation mobile communication In the technology (English: 3rd-Generation, 3G for short) network, the CS domain registration request message and the PS domain are respectively sent to the network domain of the CS domain and the PS domain of the network through the access network element of the network.
  • the registration request message, the CS domain core network element that accepts the CS domain registration request message of the UE and the PS domain core network element that accepts the PS domain registration request message of the UE always belong to the same operator, and the UE subsequently
  • the voice service signal passes through the CS domain, and the data service signal passes through the PS domain, and the same carrier provides the CS domain and the PS domain service for the UE.
  • a shared network refers to a network shared by multiple operators. Due to lack of resources or network selection policies, the PS domain and CS domain registration messages of the UE in the shared network may be accepted by the core network elements of different operators. . For example, in a shared network, the registration message of the UE in the CS domain is accepted by the CS domain core network element of the first operator, and the registration message of the UE in the PS domain is used by the PS domain core network of the second operator. Accepted by the meta, this makes the UE inconsistent with the operators of the CS domain and the PS domain of this shared network.
  • the prior art proposes a method for selecting a target shared network CS domain and a PS domain operator,
  • the UE is in the CS domain registration process of the target shared network as an example.
  • the mobile switching center (English: Mobile Switching Center, MSC for short) determines the UE and the carrier registered in the original network CS domain.
  • MSC Mobile Switching Center
  • the UE selects the core network element corresponding to the operator registered in the original network CS domain; if the base station determines that the UE is registered in the original network CS domain, If the target shared network is unavailable, the operator is reselected for the UE according to the International Mobile Subscriber Identity (IMSI) information of the UE.
  • IMSI International Mobile Subscriber Identity
  • the UE when the UE is different in the original network CS domain and the PS domain registered carrier, if the operator registered in the original network CS domain and the PS domain is available in the target shared network, the UE is in the target.
  • the operators of the shared network CS domain and PS domain will be consistent with the operators registered in the original network CS domain and PS domain respectively, that is, the UEs in the target shared network CS domain and PS domain are necessarily different; if in the original network CS domain or One of the operators of the PS domain registration may not be available in the target shared network, and the UE may not be the same in the target shared network CS domain and the PS domain.
  • the UE When the UE is only registered in the PS domain, and the registered PS domain operator is available in the target shared network, the UE is registered in the target shared network by using the method of selecting the target shared network CS domain and the PS domain operator.
  • the operators of the CS domain and the PS domain may not be the same. That is, through the prior art, the CS domain operator and the PS domain operator that the UE registers with the target shared network may still be different.
  • Embodiments of the present invention provide a method and related apparatus for selecting a target shared network CS domain and a PS domain operator, and solving a CS domain operator of the target shared network after the UE switches from the original network to a target shared network.
  • PS domain operator inconsistency issues.
  • an embodiment of the present invention provides a mobile switching center MSC, where the MSC includes: a sending unit;
  • the sending unit is configured to switch to the target shared network by the user equipment UE by using a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, before the end of the circuit switched CS domain call process of the target shared network Transmitting, by the UE, a temporary mobile subscriber identity TMSI and a location area identifier LAI of the CS domain, where the TMSI includes a network resource identifier NRI of the CS domain, and the NRI of the CS domain and the UE are in the original network packet exchange PS domain.
  • the mobility management entity coded MMEC in the globally unique temporary identity GUTI is the same, the LAI includes a public land mobile network identity PLMN ID, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI, such that the UE is
  • the TMSI and the LAI are carried in a registration request message of a CS domain sent by a base station of the target shared network.
  • the MSC further includes: a receiving unit;
  • the receiving unit is configured to receive the MMEC and the PLMN ID in the GUTI sent by the mobility management entity MME, where the MME is a core network element registered by the UE in the original network PS domain.
  • an embodiment of the present invention provides a user equipment UE, where the UE includes: a receiving unit and a sending unit;
  • the receiving unit is configured to: when the UE switches to a target shared network by using a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, the UE receives before the end of the circuit switched CS domain call process of the target shared network a temporary mobile subscriber identity TMSI and a location zone identity LAI of the circuit switched CS domain sent by the first mobile switching center MSC of the target shared network, wherein the TMSI includes a network resource identifier NRI of the CS domain, and the NRI of the CS domain
  • the UE is the same as the mobility management entity code MMEC in the globally unique temporary mobile identity GUTI of the packet switched PS domain of the original network, the LAI including the public land mobile network identity PLMN ID, the PLMN ID in the LAI and the GUTI The PLMN ID is the same;
  • the sending unit is configured to send a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain carries the TMSI and the LAI.
  • an embodiment of the present invention provides a mobility management entity MME, where the MME includes: a sending unit;
  • the sending unit is configured to switch to the target shared network by the user equipment UE by using a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, before the end of the circuit switched CS domain call process of the target shared network
  • the first mobile switching center MSC of the target shared network sends the mobility management entity code MMEC and the public land mobile network identifier PLMN ID in the globally unique temporary mobile subscriber identity GUTI of the packet switched PS domain of the original network, where
  • the MME is a core network element that is registered by the UE in the PS domain of the original network, so that the first MSC sends a temporary mobile subscriber identity of the CS domain to the UE before the UE sends a registration request message of the CS domain.
  • the TMSI and the location area identifier LAI where the TMSI includes a network resource identifier NRI of the CS domain, the NRI of the CS domain is the same as the MMEC in the GUTI, and the LAI includes a PLMN ID, and the PLMN in the LAI The ID is the same as the PLMN ID in the GUTI.
  • an embodiment of the present invention provides a service support node SGSN of a general packet radio service technology, where the SGSN includes: a first receiving unit, a sending unit, a second receiving unit, and a determining unit;
  • the first receiving unit is configured to receive a registration request message of a packet switched PS domain sent by a base station of the target shared network;
  • the sending unit is configured to send a context request message to the first core network element, where the context request message carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original network circuit.
  • the network resource identifier NRI information and the public land mobile network identifier PLMN ID information of the CS domain are exchanged, wherein the first core network network element is a core registered in the original network PS domain before the UE switches to the target shared network.
  • the second receiving unit is configured to receive a context request response message sent by the first core network element, where the context request response message carries NRI information and PLMN ID information of the UE in the original network CS domain;
  • the determining unit is configured to: according to the NRI information of the UE in the CS domain of the original network, The PLMN ID information determines whether to accept the registration request message of the PS domain.
  • an embodiment of the present invention provides a core network element, including a receiving unit and a sending unit.
  • the receiving unit is configured to receive a context request message sent by the service support node SGSN of the first general packet radio service technology of the target shared network, where the context request information carries a first identifier, where the first identifier is used to indicate the
  • the first SGSN requests to acquire the network resource identifier NRI information and the public land mobile network identifier PLMN ID information of the UE in the original network circuit switched CS domain;
  • the sending unit is configured to send a context request response message to the first SGSN according to the first identifier in the context request message, where the context request response message carries an NRI of the UE in a CS domain of an original network.
  • the information and the PLMN ID information are such that the first SGSN determines whether to accept the registration request information of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • an embodiment of the present invention provides a mobile switching center MSC, where the MSC includes a first receiving unit and a first determining unit;
  • the first receiving unit is configured to receive a registration request message of a circuit switched CS domain sent by a base station of the target shared network;
  • the first determining unit is configured to: according to the network resource identifier NRI information of the original network packet switched PS domain or the mobile management entity coded MMEC information, and the public land mobile network identifier PLMN ID, according to the user equipment UE that sends the CS domain registration request message. Information, determining whether to accept the registration request message of the CS domain.
  • the MSC further includes: a second determining unit, a sending unit, and a second receiving unit;
  • the second determining unit is configured to determine whether the MSC stores NRI information or MMEC information of the UE in the PS domain of the original network, and PLMN ID information;
  • the sending unit is configured to receive a determination result of the second determining unit, and if the determining result is that the MSC does not store the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information,
  • the second core network element sends a context request message, where the context request message carries a second identifier, and the second identifier Knowing that the first MSC requests to acquire NRI information or MMEC of the UE in the PS domain of the original network, and PLMN ID information, where the second core network element is that the UE is switching to the target sharing Before the network, the core network element registered in the original network CS domain;
  • the second receiving unit is configured to receive a context request response message sent by the second core network element, where the context request response message carries NRI information or MMEC information of the UE in the original network PS domain, and a PLMN ID. information.
  • an embodiment of the present invention provides a core network element, where the network element includes a receiving unit and a sending unit.
  • the receiving unit is configured to receive a context request message sent by the first mobile switching center MSC of the target shared network, where the context request information carries a second identifier, where the second identifier is used to indicate that the first MSC requests to obtain the location Determining, by the UE, network resource identifier NRI information or mobility management entity coded MMEC information in the original network packet switched PS domain, and public land mobile network identity PLMN ID information;
  • the sending unit is configured to send a context request response message to the first MSC according to the second identifier in the context request message, where the context request response message carries an NRI of the UE in a PS domain of an original network.
  • the information or the MMEC information, and the PLMN ID information so that the first MSC determines whether to receive the registration request message of the CS domain according to the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the UE When the user equipment UE switches to the target shared network through a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, the UE is first of the target shared network before the circuit switched CS domain call procedure of the target shared network ends
  • the mobile switching center MSC sends the temporary mobile subscriber identity TMSI and the location area identifier LAI of the CS domain to the UE, where the TMSI includes the network resource identifier NRI of the CS domain, and the NRI of the CS domain and the UE are in the original network.
  • the mobility management entity coded MMEC in the globally unique temporary identity GUTI of the packet switched PS domain is the same, the LAI contains The public land mobile network identifies a PLMN ID, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI, so that the UE carries the registration request message of the CS domain sent to the base station of the target shared network. TMS and the LAI.
  • the method before the first mobile switching center MSC of the target shared network sends the temporary mobile subscriber identity TMSI and the location zone identifier LAI of the CS domain to the UE, the method further include:
  • the first MSC receives the MMEC and the PLMN ID in the GUTI sent by the mobility management entity MME, where the MME is a core network element registered by the UE in the original network PS domain.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the UE When the user equipment UE switches to the target shared network through a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, the UE receives the target shared network before the circuit switched CS domain call procedure of the target shared network ends a temporary mobile subscriber identity TMSI and a location area identifier LAI of the CS-switched CS domain sent by the first mobile switching center MSC, where the TMSI includes a network resource identifier NRI of the CS domain, and the NRI of the CS domain and the UE are in the original The mobility management entity coded MMEC in the globally unique temporary mobile identity GUTI of the packet switched PS domain of the network, the LAI including the public land mobile network identity PLMN ID, the PLMN ID in the LAI and the PLMN ID in the GUTI the same;
  • the UE sends a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain carries the TMSI and the LAI.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the UE moves to the target before the end of the circuit switched CS domain call procedure of the target shared network
  • the first mobile switching center MSC of the shared network transmits the mobility management entity code of the UE in the globally unique temporary mobile subscriber identity GUTI of the packet switched PS domain of the original network
  • the MMEC and the public land mobile network identify the PLMN ID, wherein the MME is a core network element registered by the UE in the PS domain of the original network, such that the first MSC before the UE sends a registration request message of the CS domain.
  • a temporary mobile subscriber identity TMSI and a location area identifier LAI of the CS domain where the TMSI includes a network resource identifier NRI of the CS domain, and the NRI of the CS domain is the same as the MMEC in the GUTI.
  • the LAI contains a PLMN ID, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the service support node SGSN of the first general packet radio service technology of the target shared network receives the registration request message of the packet switched PS domain sent by the base station of the target shared network;
  • the first SGSN sends a context request message to the first core network element, where the context request message carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original network circuit switched CS.
  • the first SGSN receives a context request response message sent by the first core network element, where the context request response message carries NRI information and PLMN ID information of the UE in the original network CS domain;
  • the first SGSN determines whether to accept the registration request message of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the first core network element Receiving, by the first core network element, a context request message sent by the service support node SGSN of the first general packet radio service technology of the target shared network, where the context request information carries a first identifier, where the first identifier is used to indicate the first An SGSN requests to acquire the network resource identifier NRI information and the public of the UE in the original network circuit switched CS domain
  • the land mobile network identifies the PLMN ID information, where the first core network element is a core network element registered in the original network PS domain before the UE switches to the target shared network;
  • the first core network element sends a context request response message to the first SGSN according to the first identifier in the context request message, where the context request response message carries the UE in the original network CS domain.
  • the NRI information and the PLMN ID information are such that the first SGSN determines whether to accept the registration request information of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the first mobile switching center MSC of the target shared network receives the registration request message of the circuit switched CS domain sent by the base station of the target shared network;
  • the network resource identifier NRI information or the mobility management entity coded MMEC information of the original network packet switched PS domain and the public land mobile network identifier PLMN ID information is accepted.
  • the first MSC according to the user equipment UE that sends the CS domain registration request message, is in the original network packet switched PS domain network resource identifier NRI information or a mobility management entity.
  • the method further includes: encoding the MMEC information, and the public land mobile network identifier PLMN ID information, and determining whether to accept the registration request message of the CS domain, the method further includes:
  • the first MSC sends a context request message to the second core network element, where the context request message carries a second identifier, where the second identifier is used to indicate that the first MSC requests to acquire the UE.
  • the first MSC receives a context request response message sent by the second core network element, where the context request response message carries NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information.
  • an embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the method includes:
  • the second core network element receives the context request message sent by the first mobile switching center MSC of the target shared network, where the context request information carries a second identifier, where the second identifier is used to indicate that the first MSC requests to obtain the location
  • the second core network element sends a context request response message to the first MSC according to the second identifier in the context request message, where the context request response message carries the UE in the original network PS domain.
  • the NRI information or the MMEC information, and the PLMN ID information so that the first MSC determines whether to receive the registration request message of the CS domain according to the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information.
  • an embodiment of the present invention provides a mobile switching center MSC, where the MSC includes a processor, a bus, a memory, and a transmitter;
  • the processor calls the content in the memory through the bus, and when the user equipment UE switches to the target shared network by using a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, the UE is in the target shared network.
  • the temporary mobile subscriber identity TMSI and the location area identifier LAI of the CS domain are reassigned to the UE before the end of the circuit switched CS domain call process, wherein the TMSI includes a network resource identifier NRI of the CS domain, and the CS domain
  • the NRI is the same as the mobility management entity code MMEC in the globally unique temporary identity GUTI of the original network packet switched PS domain, the LAI including the public land mobile network identity PLMN ID, the PLMN ID in the LAI and the GUTI
  • the PLMN ID is the same;
  • the transmitter is configured to send the TMSI and the LAI to the UE, so that the UE carries the TMSI and the LAI in a registration request message of a CS domain sent to a base station of the target shared network. .
  • the MSC further includes: a receiver
  • the receiver is configured to receive the MMEC and the PLMN ID in the GUTI sent by the mobility management entity MME, where the MME is a core network element registered by the UE in the original network PS domain.
  • an embodiment of the present invention provides a user equipment UE, where the user equipment UE includes a receiver, a processor, a bus, a memory, and a transmitter;
  • the receiver configured to: when the UE switches to a target shared network by using a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, before the end of the circuit switched CS domain call process of the target shared network, the UE Receiving a temporary mobile subscriber identity TMSI and a location zone identifier LAI of the circuit switched CS domain sent by the first mobile switching center MSC of the target shared network, where the TMSI includes a network resource identifier NRI of the CS domain, and the NRI of the CS domain Same as the mobility management entity coding MMEC in the globally unique temporary mobility identity GUTI of the packet switched PS domain of the original network, the LAI comprising a public land mobile network identity PLMN ID, the PLMN ID in the LAI and the The PLMN ID in GUTI is the same;
  • the processor by using the bus to invoke an instruction in the memory, to generate a CS domain registration request message, where the registration request message of the CS domain carries the TMSI and the LAI, and the A CS domain registration request message is sent to the base station of the target shared network.
  • an embodiment of the present invention provides a mobility management entity MME, where the MME includes a processor, a bus, a memory, and a transmitter;
  • the processor invokes an instruction in the memory through the bus, and when the user equipment UE switches to a target shared network through a single wireless voice call continuity SRVCC or a circuit domain fallback CSFB, the UE is in the target shared network circuit
  • the first mobile switching center MSC to the target shared network Allocating a mobility management entity coding MMEC and a public land mobile network identity PLMN ID in the globally unique temporary mobile subscriber identity GUTI of the packet switched PS domain of the original network, wherein the MME is the PS domain of the UE in the original network a registered core network element, such that the first MSC sends a temporary mobile subscriber identity TMSI and a location zone identifier LAI of the CS domain to the UE before the UE sends a registration request message of the CS domain, where the TMSI Included in the network domain identifier NRI of the CS domain, the NRI of the CS domain is the same as the MMEC in the GUTI, the LA
  • the transmitter is configured to send, by the UE, a mobility management entity code MMEC and a public land mobile network identity PLMN ID in a globally unique temporary mobile subscriber identity GUTI of a packet switched PS domain of the original network to the first MSC.
  • an embodiment of the present invention provides a service support node SGSN of a general packet radio service technology, where the SGSN includes a receiver, a processor, a bus, a memory, and a transmitter;
  • the receiver is configured to receive a registration request message of a packet switched PS domain sent by a base station of the target shared network;
  • the processor by using the bus to invoke an instruction in the memory, to generate a context request message, where the context request message carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original Network resource identification NRI information of the network circuit switched CS domain and public land mobile network identity PLMN ID information;
  • the receiver is further configured to: receive a context request response message sent by the first core network element, where the context request response message carries NRI information and PLMN ID information of the UE in a CS domain of the original network;
  • the processor by using the bus, invokes an instruction in the memory, to determine whether to accept the registration request message of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • an embodiment of the present invention provides a core network element, where the network element includes a receiver, a processor, a bus, a memory, and a transmitter;
  • a receiver configured to receive a context request message sent by a service support node SGSN of a first general packet radio service technology of a target shared network, where the context request information carries a first identifier, where the first identifier is used to indicate the
  • the first SGSN requests to acquire the network resource identifier NRI information and the public land mobile network identifier PLMN ID information of the UE in the original network circuit switched CS domain;
  • the processor by using the bus, to invoke an instruction in the memory, to generate a context request response message according to the first identifier in the context request message, where the context request response message carries the UE The NRI information and the PLMN ID information of the original network CS domain, so that the first SGSN determines whether to accept the registration request information of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain, and by using the The sender sends the context request response message to the first SGSN.
  • an embodiment of the present invention provides a mobile switching center MSC, where the MSC includes: a receiver, a processor, a bus, and a memory;
  • the receiver is configured to receive a registration request message of a circuit switched CS domain sent by a base station of the target shared network;
  • the processor invokes, by the bus, an instruction in the memory, for the network resource identifier NRI information or the mobility management entity code MMEC of the user equipment UE in the original network packet switched PS domain according to the UE domain registration request message that sends the CS domain registration request message.
  • the information, and the public land mobile network identifier PLMN ID information determine whether to accept the registration request message of the CS domain.
  • the processor is further configured to:
  • the context request message carries a second identifier, where the second identifier is used to indicate that the first MSC requests to acquire the UE in the original NRI information or MMEC of the network PS domain, and PLMN ID information;
  • the MSC further includes a receiver, configured to receive a context request response message sent by the second core network element, where the context request response message carries NRI information or MMEC information of the UE in the PS domain of the original network, and the PLMN. ID information.
  • an embodiment of the present invention provides a core network element, including: a receiver, a processor, a bus, a memory, and a transmitter;
  • the receiver is configured to receive a context request message sent by the first mobile switching center MSC of the target shared network, where the context request information carries a second identifier, where the second identifier is used to indicate that the first MSC requests to obtain the location Determining, by the UE, network resource identifier NRI information or mobility management entity coded MMEC information in the original network packet switched PS domain, and public land mobile network identity PLMN ID information;
  • the processor by using the bus, to invoke an instruction in the memory, to generate a context request response message according to the second identifier in the context request message, where the context request response message carries the UE NRI information or MMEC information in the original network PS domain, and PLMN ID information, so that the first MSC determines whether to receive the CS domain according to the NRI information or MMEC information of the UE in the PS domain of the original network, and the PLMN ID information.
  • Registration request message ;
  • the transmitter is configured to send the context request response message to the first MSC.
  • an embodiment of the present invention provides a communication system, including: the first aspect and the first possible implementation manner of the first aspect, the fifteen aspect, and the fifteenth aspect
  • the mobile switching center MSC according to any one of the preceding embodiments, and the user equipment UE of the second aspect or the sixteenth aspect, and the mobility management entity MME of the third aspect or the seventeenth aspect.
  • the embodiment of the present invention provides a communication system, comprising: the general packet radio service technology according to the fourth aspect or the eighteenth aspect
  • the service support node SGSN and the core network element described in any one of the fifth aspect and the nineteenth aspect.
  • the embodiment of the present invention provides a communication system, comprising any one of the first aspect to the first aspect of the sixth aspect, and the first to the twentieth aspect A mobile switching center MSC as claimed in any one of the possible embodiments, and/or a core network element as described in the seventh aspect and the twenty-first aspect.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator.
  • the target shared network side passes the UE in the original network.
  • the PS domain registration registration information, or the registration information of the UE in the original network CS domain performs registration of the UE in the PS domain and the CS domain of the target shared network.
  • the CS domain operator registered by the UE on the target shared network side is consistent with the PS domain operator, and is the PS domain operator or the CS domain operator registered by the UE on the original network side, or both are
  • the base station of the target shared network solves the CS domain operator and the PS domain operator registered by the UE in the target shared network in the prior art according to the IMSI of the UE and the operator selected by the UE by the preset policy. Inconsistent issues.
  • FIG. 1 is a schematic diagram of a mobile switching center according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a mobility management entity according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a service support node of a general packet radio service technology according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a core network element according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of still another mobile switching center according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of still another core network element according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a computer system according to an embodiment of the present invention.
  • FIG. 9 is a flowchart 1 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention.
  • FIG. 10 is a flowchart 2 of a method for selecting a target shared network CS domain and a PS domain operator according to an embodiment of the present invention
  • FIG. 11 is a flowchart of a method for selecting a CS domain and a PS domain operator of a target shared network in an SRVCC scenario according to an embodiment of the present invention
  • FIG. 12 is a flowchart of a method for selecting a target shared network CS domain and a PS domain operator in a called CSFB scenario according to an embodiment of the present invention
  • FIG. 13 is a flowchart of a method for selecting a target shared network CS domain and a PS domain operator in a calling CSFB scenario according to an embodiment of the present invention
  • FIG. 14 is a flowchart 3 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 15 is a flowchart 4 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 16 is a flowchart 5 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 17 is a flowchart 6 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 18 is a flowchart 7 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 19 is a flowchart 8 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 20 is a flowchart 9 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 21 is a flowchart 10 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • FIG. 22 is a schematic diagram of the first MSC obtained in FIG. 13 according to an embodiment of the present invention. Schematic diagram of the process of registering a message of the UE in the original network PS domain;
  • FIG. 23 is a flowchart 11 of a method for selecting a CS domain and a PS domain operator of a target shared network according to an embodiment of the present invention
  • Figure 24 is a schematic diagram 1 of a communication system
  • Figure 25 is a schematic diagram 2 of a communication system
  • Figure 26 is a third schematic diagram of a communication system.
  • a method for selecting a target shared network CS domain and a PS domain operator is provided, which aims to make the user equipment UE After switching from the original network to the target shared network, the CS domain registered in the target shared network is the same as the carrier of the PS domain.
  • the UE is registered in the original network CS domain, and now switches to the target shared network, and the CS domain registration process of the target shared network is taken as an example.
  • the core network element of the target shared network After receiving the CS domain registration request message sent by the UE, the core network element of the target shared network obtains the CS domain identifier that is allocated by the UE in the CS domain of the original network according to the CS domain registration request message, if it is determined
  • the operator that is registered in the CS domain of the original network is different from the carrier that is served by the UE, and sends a rerouting command to the base station of the target shared network, instructing the base station to reselect the CS domain core network element for the UE.
  • the re-routing command received by the base station carries the CS domain identifier and the IMSI information of the core network element that is registered by the UE in the original network CS domain, and the CS domain identifier of the UE includes: Network Resource Identifier (English: Network Resource Identifier, NRI) and Location Area Identifier (English: Temporary Mobile Subscriber Identity, TMSI)
  • NRI Network Resource Identifier
  • TMSI Temporary Mobile Subscriber Identity
  • PLMN ID Public Land Mobile Network Identification
  • LAI Location Area Identity
  • the network CS domain is registered with the operator, and when the operator is available to the target shared network, the base station selects the core network element corresponding to the operator for the UE; if the operator is unavailable in the target shared network, The base station reselects the operator for the UE according to the IMSI information of the UE, and sends a CS domain registration request message of the UE to the CS domain core network element corresponding to the operator, and indicates the CS.
  • the domain core network element accepts the CS domain registration request message.
  • the UE is different in the original network PS domain and the CS domain, and the CS domain operator and the PS domain operator registered in the original network have at least one available in the target shared network.
  • the operators registered in the target shared network PS domain and CS domain may not be the same.
  • the operator registered in the original network CS domain is the carrier one
  • the operator registered in the original network PS domain is the operator 2
  • only one operator is available in the target shared network, such as the carrier is available in the target shared network
  • the operation If the second is not available in the target shared network
  • the UE registered in the target shared network CS domain is the operator one
  • the operator registered in the PS domain is the target shared network side base station according to the UE's IMSI, and the preset
  • the algorithm, which is selected for the UE may be the operator one or the operator one.
  • the UE may be different in the target shared network PS domain and the CS domain.
  • the PS domain operator registered by the UE in the target shared network is still the operator one, and the operator registered in the CS domain is the target sharing.
  • the base station on the network side selects the UE for the UE according to the IMSI of the UE and the preset algorithm, and may or may not be the operator one.
  • the above-mentioned prior art does not guarantee that the CS operator registered with the target shared network is the same as the PS operator, that is, the existing UE still has the CS domain and the PS domain in the target shared network. Inconsistent issues with registered carriers.
  • an embodiment of the present invention proposes a target sharing network.
  • Method and related device of the CS domain and the PS domain operator by allowing the target shared network side to select a CS domain operator of the target shared network according to the registration message of the UE in the original network PS domain; or by letting the target shared network side
  • the registration message of the UE in the original network CS domain selects the PS domain operator of the target shared network for the UE, and solves the problem that the UE in the target shared network CS domain domain PS domain operator is inconsistent in the prior art.
  • an embodiment of the present invention provides an MSC, including: a sending unit 101;
  • the sending unit 101 is configured to switch to the target shared network by using a Single Radio Voice Call Continuity (SRVCC) or a Circuit Switched Fallback (CSFB) in the UE.
  • the UE sends the TMSI and the LAI of the CS domain to the UE before the end of the CS domain call process of the target shared network, where the TMSI includes the NRI of the CS domain, and the NRI of the CS domain
  • the mobility management entity code (English: Mobility Management Entity, MMEC) in the globally unique temporary identifier (GUTI) of the original network PS domain is the same, and the LAI includes the PLMN ID.
  • the PLMN ID in the LAI is the same as the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in a registration request message of a CS domain sent to a base station of the target shared network.
  • the MSC when the first MSC does not store the MMEC and the PLMN ID of the UE in the original network PS domain, in order to obtain the MMEC and the PLMN ID of the UE in the original network PS domain, the MSC further includes: a receiving unit 102;
  • the receiving unit 102 is configured to receive an MMEC and a PLMN ID in the GUTI sent by a mobility management entity (English: Mobility Management Entity, MME for short), where the MME is registered by the UE in the original network PS domain. Core network element.
  • a mobility management entity English: Mobility Management Entity, MME for short
  • the receiving unit 102 is specifically configured to:
  • the handover request message of the PS domain that is sent by the MME to the CS domain is received, where the handover request message carries the MMEC and the PLMN ID in the GUTI. .
  • the receiving unit 102 is specifically configured to:
  • the UE If the UE is handed over to the target shared network by using the SRVCC, receiving a handover request message that is sent by the MME to the CS domain, where the handover request message carries the packet of the UE in the original network PS domain.
  • the Temporary Mobile Subscriber Identity (English: Packet Temporary Mobile Subscriber Identity, P-TMSI) and the Routing Area Identity (RAI)
  • P-TMSI carries the MMEC
  • RAI Routing Area Identity
  • the PLMN ID in the GUTI is carried in, and the P-TMSI and the RAI are mapped by the GUTI.
  • the receiving unit 102 is specifically configured to:
  • the service request message sent by the MME is received, where the service request message is used. And indicating the connection status of the UE, so that the first MSC stops paging the UE, and the service request message carries the MMEC and the PLMN ID in the GUTI.
  • the receiving unit 102 is specifically configured to:
  • the service request message sent by the MME is received, where the service request message is used. Determining the connection status of the UE, so that the first MSC stops paging the UE, and the service request message carries the P-TMSI and the RAI of the UE in the PS domain of the original network, in the P-TMSI Carrying the MMEC, the RAI carries a PLMN ID in the GUTI, and the P-TMSI and the RAI are mapped by the GUTI.
  • the receiving unit 102 is specifically configured to:
  • the calling CSFB indication message sent by the MME, where the calling CSFB indication message is used to indicate a service request message subsequently received by the first MSC. It is caused by the calling CSFB, and the calling CSFB indication message carries the MMEC and the PLMN ID in the GUTI.
  • the receiving unit 102 is specifically configured to:
  • the calling CSFB indication message sent by the MME, where the calling CSFB indication message is used to indicate a service request message subsequently received by the first MSC. It is caused by the calling CSFB, and the calling CSFB indication message carries the P-TMSI and the RAI of the UE in the original network PS domain, where the P-TMSI carries the MMEC, and the RAI carries The PLMN ID in the GUTI, the P-TMSI and the RAI are mapped by the GUTI.
  • the embodiment of the present invention provides an MSC, which is a first MSC located in a target shared network, and is accessed by the user equipment UE from the PS domain of the original LTE or 4G network to the target shared network by using SRVCC or CSFB.
  • the first MSC re-allocates the TMSI and the LAI to the UE before the UE ends the call, and the NRI in the re-allocated TMSI is the same as the MMEC in the GUTI of the original network PS domain.
  • the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the network side selects the same operator for the UE according to the MMEC and the PLMN ID in the GUTI, thereby solving the prior art.
  • the user equipment UE switches from the LTE or 4G network to the shared 2G or 3G network through the SRVCC or the CSFB, the UE is inconsistent with the operators of the CS domain and the PS domain.
  • the LAI includes a PLMN ID
  • the UE can acquire the registered PLMN according to the PLMN ID (English: Registered The Public Land Mobile Network (RPLMN) solves the problem that the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network in the prior art, and there is no problem caused by the RPLMN in the process.
  • PLMN ID English: Registered The Public Land Mobile Network (RPLMN) solves the problem that the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network in the prior art, and there is no problem caused by the RPLMN in the process.
  • RPLMN Registered The Public Land Mobile Network
  • the embodiment of the present invention provides a UE, and the UE includes: a receiving unit 201 and a sending unit 202;
  • the receiving unit 201 is configured to: when the UE is switched to the target shared network by using the SRVCC or the CSFB, the UE receives the CS sent by the first MSC of the target shared network before the CS domain call process of the target shared network ends.
  • the TMSI and the LAI of the domain where the TMSI includes the NRI of the CS domain, the NRI of the CS domain is the same as the MMEC of the UE in the GUTI of the PS domain of the original network, and the LAI includes the PLMN ID, the LAI The PLMN ID in the same is the same as the PLMN ID in the GUTI;
  • the sending unit 202 is configured to send a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain carries the TMSI and the LAI.
  • the embodiment of the present invention provides a user equipment UE, and the target shared network selects a CS domain operator and a PS domain operator of the target shared network according to the MMEC and the PLMN ID of the UE in the GUTI of the original network PS domain, so that the UE The CS domain operation registered on the target shared network is the same as the PS domain operator.
  • the LAI since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the existing In the technology, the UE switches to the target shared network through SRVCC or CSFB, and there is no problem caused by the RPLMN during the call.
  • the MME includes: a sending unit 301, in order to solve the problem that the CS domain operator and the PS domain operator that are registered by the target shared network are inconsistent, the embodiment of the present invention provides a mobility management entity MME, and the MME includes:
  • the sending unit 301 is configured to: when the user equipment UE switches to the target shared network by using the SRVCC or the CSFB, the UE sends the first MSC of the target shared network before the end of the CS domain call process of the target shared network
  • the MMEC and the PLMN ID of the UE in the GUTI of the PS domain of the original network where the MME is a core network element registered by the UE in the PS domain of the original network, so that the first MSC is sent by the UE
  • the registration request message of the CS domain sends the TMSI and the LAI of the CS domain to the UE, where the TMSI includes the NRI of the CS domain, the NRI of the CS domain is the same as the MMEC in the GUTI, and the LAI includes PLMN ID, said The PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the embodiment of the present invention provides an MME, where the target shared network selects a CS domain operator and a PS domain operator of the target shared network according to the MMEC and the PLMN ID of the UE in the GUTI of the original network PS domain, so that the UE is in the target.
  • the CS domain operation of the shared network registration is the same as that of the PS domain operator.
  • the LAI since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the existing In the technology, after the UE switches from the SRVCC or the CSFB to the target shared network, there is no problem caused by the RPLMN during the call.
  • the embodiment of the present invention provides a service support node of the general packet radio service technology (English: Serving GPRS SUPPORT NODE, referred to as: SGSN), in conjunction with FIG. 4, the SGSN includes: a first receiving unit 401, a sending unit 402, a second receiving unit 403, and a determining unit 404;
  • SGSN includes: a first receiving unit 401, a sending unit 402, a second receiving unit 403, and a determining unit 404;
  • the first receiving unit 401 is configured to receive a registration request message of a PS domain sent by a base station of the target shared network.
  • the sending unit 402 is configured to send a context request message to the first core network element, where the context request message carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original network.
  • the second receiving unit 403 is configured to receive a context request response message sent by the first core network element, where the context request response message carries NRI information and PLMN ID information of the UE in the CS domain of the original network;
  • the determining unit 404 is configured to determine, according to the NRI information and the PLMN ID information of the UE in the original network CS domain, whether to accept the registration request message of the PS domain.
  • the determining unit 404 is configured to:
  • the sending unit 402 is further configured to: send an accept response message to the UE;
  • the sending unit 402 is further configured to: send a re-routing message to the base station, where the re-routing message carries NRI information, PLMN ID information, and IMSI information of the UE in the CS domain of the original network. .
  • the embodiment of the present invention provides an SGSN. After receiving the registration request message of the UE in the PS domain, the SGSN does not determine whether to accept the registration request message of the PS domain or send a reroute to the base station of the target shared network.
  • the ID selects the same CS domain and the PS domain operator for the UE, thereby solving the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art.
  • the embodiment of the present invention provides a core network element, where the core network element is the UE is switched to the target sharing.
  • the core network element registered in the original network PS domain in conjunction with FIG. 5, includes a receiving unit 501 and a sending unit 502;
  • the receiving unit 501 is configured to receive a context request message sent by the first SGSN of the target shared network, where the context request information carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE.
  • the sending unit 502 is configured to send a context request response message to the first SGSN according to the first identifier in the context request message, where the context request response message carries the UE in a CS domain of an original network.
  • the NRI information and the PLMN ID information are such that the first SGSN determines whether to accept the registration request information of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • the core network element receives the first SGSN at the receiving unit Before the Context Request message is sent, the NRI information and the PLMN ID information of the UE in the original network CS domain are also required to be obtained. Based on this, the core network element further includes: an obtaining unit 503;
  • the acquiring unit 503 is configured to obtain NRI information and PLMN ID information of the UE in the CS domain of the original network.
  • the embodiment of the present invention provides a core network element, such that the target shared network side selects the same target shared network CS domain operator and PS domain operator according to the NRI and PLMN ID of the UE in the original network CS domain. Therefore, the problem that the CS domain operator and the PS domain operator selected by the target network for the user equipment UE in the prior art may be different may be solved.
  • the embodiment of the present invention provides an MSC, which includes a first receiving unit 601 and a first determining unit 602 in conjunction with FIG. 6;
  • the first receiving unit 601 is configured to receive a registration request message of a CS domain sent by a base station of the target shared network;
  • the first determining unit 602 is configured to determine, according to the NRI information or the MMEC information of the original network PS domain, and the PLMN ID information, whether the user equipment UE that sends the CS domain registration request message accepts the registration request message of the CS domain. .
  • the MSC further includes: a second determining unit 603, a sending unit 604, and a second receiving unit 605;
  • the second determining unit 603 is configured to determine whether the MSC stores NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information;
  • the sending unit 604 is configured to receive a determination result of the second determining unit, and if the determining result is that the MSC does not store the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information, Send to the second core network element Sending a context request message, where the context request message carries a second identifier, where the second identifier is used to indicate that the first MSC requests to acquire NRI information or MMEC of the UE in the original network PS domain, and PLMN ID information, where The second core network element is a core network element registered by the UE in the original network CS domain before switching to the target shared network;
  • the second receiving unit 605 is configured to receive a context request response message sent by the second core network element, where the context request response message carries NRI information or MMEC information of the UE in the PS domain of the original network, and the PLMN. ID information.
  • the first determining unit 1102 is configured to:
  • the sending unit 1104 is further configured to: send an accept response message to the UE;
  • the sending unit 1104 is further configured to: send a re-routing message to the base station, where the re-routing message carries NRI information or MMEC information, PLMN ID information, and the UE of the UE in the original network PS domain. IMSI information.
  • the embodiment of the present invention provides an MSC, after receiving the registration request message of the CS domain in the CS domain, the MSC does not determine whether to accept the registration request message of the CS domain or the base station to the target shared network.
  • Sending a rerouting command message but determining whether it stores the registration message of the UE in the original network PS domain, if not, sending a context request message to the core network element registered by the UE in the original CS domain, to obtain the UE in the original
  • the NRI or MMEC information of the PS domain, and the PLMN ID information, in the subsequent CS domain and PS domain registration process, the network element of the target shared network is according to the NRI/MMEC and PLMN ID of the UE in the original PS domain.
  • the UE selects the same CS domain and the PS domain operator, thereby solving the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art.
  • the embodiment of the present invention provides a core network element, the core network.
  • the network element is a core network element registered in the original network CS domain before the UE switches to the target shared network.
  • the network element includes a receiving unit 701 and a sending unit 702.
  • the receiving unit 701 is configured to receive a context request message sent by the first MSC of the target shared network, where the context request information carries a second identifier, where the second identifier is used to indicate that the first MSC requests to acquire the UE.
  • the sending unit 702 is configured to send a context request response message to the first MSC according to the second identifier in the context request message, where the context request response message carries the UE in a PS domain of an original network.
  • the NRI information or the MMEC information, and the PLMN ID information so that the first MSC determines whether to receive the registration request message of the CS domain according to the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information.
  • the second core network element before the receiving unit receives the context request message sent by the first MSC, further needs to acquire NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information, based on With reference to Figure 7, the network element further includes: an obtaining unit 703;
  • the acquiring unit 703 is configured to acquire NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information.
  • the embodiment of the present invention provides a core network element, such that the target shared network selects the CS domain operator of the same target shared network for the UE according to the NRI or MMEC of the original network PS domain and the PLMN ID of the UE.
  • the PS domain operator solves the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art.
  • the receiving unit may be implemented by the receiver 801, and the sending unit may be implemented by the transmitter 802.
  • the network element further includes a processor. 803.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the method is applied to the UE.
  • the SRVCC or CSFB technology the scenario of switching from the original LTE or 4G network to the target sharing 2G or 3G network, the execution entity of the method is the first MSC of the CS domain core network element of the target sharing 2G or 3G network, and FIG. Methods include:
  • the first MSC of the target shared network sends the TMSI of the CS domain to the UE before the CS domain call process of the target shared network ends.
  • the TMSI includes an NRI of a CS domain
  • the NRI of the CS domain is the same as an MMEC of the UE in a GUTI of an original network packet switched PS domain
  • the LAI includes a PLMN ID
  • a PLMN in the LAI The ID is the same as the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in a registration request message of a CS domain sent to a base station of the target shared network.
  • the MME registered by the UE in the original LTE or 4G network selects the first MSC of the target shared network to assist the UE in the call process of the target shared network;
  • the network element of the network where the calling UE is located sends a paging request message to the first MSC registered by the UE on the 2G or 3G network, the first MSC.
  • the paging request message is sent to the MME registered by the UE.
  • the first MSC assists the UE to complete the call process on the target shared network.
  • the UE switches to the first MSC through the SRVCC or the CSFB, and the UE cannot perform the registration process on the target shared network before the end of the call process, only after the UE ends the call on the target shared network, the UE In order to register the CS domain and register the PS domain on the target shared network.
  • the registration of a UE in a network can be mainly divided into two types.
  • the first one is an attach procedure initiated by the UE in the CS domain and the PS domain of one network after the booting, and the other is when the UE is booting and completing the attaching process. Due to the reasons of mobile, etc., it is necessary to switch to another network in the power-on state, the location area update (English: Location Area Identity, LAU) process initiated by the CS domain of another network, and the routing area update initiated by the PS domain. :Routing Area Update, referred to as: RAU) process.
  • the registration of the UE in the CS domain and the PS domain of the target shared network is a LAU and RAU procedure, respectively, in the SRVCC or CSFB scenario applied in the embodiment of the present method.
  • the first MSC sends the TMSI and the LAI to the UE, where the NRI in the TMSI is the same as the MMEC in the GUTI allocated by the MME registered by the original LTE or 4G network.
  • the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the UE After the UE ends the call of the target shared network, the UE performs the registration process of the CS domain and the PS domain in the target shared network, and the CS domain registration request message sent by the UE is a LAU request message, where the LAU request message carries the The PSI and the LAI of the first MSC, the PS domain registration request message sent by the UE is a RAU request message, where the RAU request message carries the P-TMSI and the RAI of the GUTI equivalent mapping, where the P- The NRI in the TMSI is the same as the MMEC in the GUTI, and the PLMN ID in the RAI is the same as the PLMN ID in the GUTI.
  • the CS domain NRI in the LAU and the PLMN ID and the PS domain NRI and the PLMN ID in the RAU are all assigned by the same operator, that is, the operator registered by the UE in the original network PS domain, which is assumed to be the operator one.
  • the base station determines whether the NRI and the operator's correspondence relationship carried in the LAU request message are stored, and after receiving the RAU request message sent by the UE, determining whether the RAU request message is stored. If the NRI carried in the LAU request message is the same as the NRI carried in the RAU request message, if the base station stores the corresponding relationship between the NRI and the carrier 1 Sending the LAU request message to an MSC corresponding to the operator, and sending the RAU request message to the operator Corresponding SGSN, so that the UE is the same as the PS domain operator registered by the target shared network and the PS domain operator.
  • the base station If the base station does not store the corresponding relationship between the NRI and the operator, after receiving the LAU request message sent by the UE, the base station sends the LAU request message to the base station randomly or according to a certain policy.
  • a connected MSC which is assumed to be MSC1
  • the base station after receiving the RAU request message sent by the UE, the base station randomly sends the RAU request message to an SGSN connected to the base station according to a certain policy, which is assumed to be SGSN1.
  • the MSC1 After receiving the LAU request message, the MSC1 determines, according to the NRI and/or the PLMN ID carried in the LAU request message, whether the operator that allocates the NRI and the PLMN ID is the operator to which it belongs, and if so, the MSC1 belongs to The operator is the operator one, the MSC1 accepts the LAU request, and if not, sends a rerouting command to the base station, where the CS domain NRI and the PLMN ID are carried, and the IMSI information of the UE that sends the LAU request is Specifically, how to obtain the IMSI of the UE in the MSC1 may be performed in multiple manners, for example, directly to the UE, and the details are not described herein.
  • the base station If the base station receives the rerouting command sent by the MSC1, the base station first determines, according to the NRI and the PLMN ID in the rerouting command, that the operator corresponding to the NRI and the PLMN ID is the operator one, and determines that the operator is in the target sharing. Whether the network is available, if available, the LAU request is sent to an MSC corresponding to the operator, and if not available, according to the IMSI of the UE, and a preset algorithm, such as a hash algorithm, is the UE. Reselect an operator and send the LAU request to the MSC corresponding to the operator.
  • SGSN1 performs the same judgment as MSC1.
  • the IMSI of the UE is unique, and the base station is a CS domain and a PS domain operator that are reselected for the UE according to the same preset algorithm, and therefore, the base station is The CS domain and the PS domain operator reselected by the UE must also be the same. Based on this, the CS domain operator and the PS domain operator registered by the UE on the target shared network must be the same.
  • the registered core network element allocates PLMN ID information to the UE, and the UE according to the PLMN ID
  • the PLMN list is obtained as a registered PLMN, that is, an RPLMN, for subsequent network selection, and the network name is correctly displayed on the UE side.
  • the UE when the UE switches from the original LTE or 4G network to the target shared network through the SRVCC or the CSFB, the UE must perform the CS domain and the PS in the target shared network after the CS session of the target shared network ends.
  • the registration process of the domain acquires the re-allocated PLMN ID of the operator registered in the target shared network, and the RPLMN of the UE in the original LTE network is unavailable in the target shared network, and therefore, when the UE switches to the SRVCC or CSFB to The target shares the network, and before the end of the CS domain call process of the target shared network, the UE has no available RPLMNs in the target shared network, which will cause some problems, such as the UE has no network name at this stage. Displaying, or if the UE needs to reselect the network after the call ends, the UE has no basis for reselecting the network or the like because no RPLMN is available.
  • the UE has received the LAI re-allocated by the first MSC before the end of the CS session of the target shared network, and the LAI carries the PLMN ID, and the UE can be based on the PLMN ID.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the execution entity of the method is the first MSC of the target shared network CS domain, and the user equipment UE is from the original LTE through SRVCC or CSFB.
  • the first MSC redistributes the TMSI and the LAI for the UE before the end of the UE call, and the NRI and the RSI in the redistributed TMSI
  • the UE has the same MMEC in the GUTI of the original network PS domain, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the network side selects the same CS domain operator and the PS domain operator for the UE according to the MMEC and the PLMN ID. Therefore, the problem that the CS domain operator and the PS domain operator registered by the UE in the target shared network are inconsistent is solved.
  • the LAI since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, The UE can obtain the RPLMN according to the PLMN ID, thereby solving the problem that the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network in the prior art, and there is no problem caused by the RPLMN in the process. .
  • the embodiment of the present invention further provides a method for selecting a target shared network CS domain and a PS domain operator. The method is performed by the first MSC. Referring to FIG. 10, the method includes:
  • the first MSC receives the MMEC and the PLMN ID in the GUTI sent by the MME, where the MME is a core network element registered by the UE in the original network PS domain.
  • the first MSC may have acquired the registration message of the UE on the MME of the original LTE or 4G network.
  • the UE has already performed the CSFB process.
  • the MME is jointly registered with the MME of one LTE or 4G network and the MSC of another 2G or 3G network.
  • the MME can obtain the registration message of the UE on the MSC, that is, the MSC registered by the UE is the UE.
  • the allocated TMSI and the LAI the MSC can obtain the registration message of the UE on the MME, that is, the GUTI allocated by the UE to the UE in the registered MME.
  • the first MSC that assists the UE in completing the call of the target shared network may be the MSC that the UE has registered with the target shared network, and at this time, the first MSC can acquire the UE.
  • the joint registration is only a special case in which the UE is registered in the original network CS domain and the PS domain, and the UE may also be registered in the original network CS domain and PS domain, but not jointly registered, and the registration time is mutual Independently, the registered PS domain core network element cannot know the registration letter of the UE on the registered CS domain core network element.
  • the registered CS domain core network element may also not be aware of the registration information of the UE on the registered PS domain core network element.
  • the first MSC cannot directly obtain the registration information of the MME that is registered by the UE in the original LTE or the 4G network, that is, the MME cannot directly obtain the GUTI that the UE is allocated in the original network. .
  • the first MSC needs to acquire the UE in the original network PS domain from the MME registered by the UE in the original network LTE or 4G network before the UE ends the CS domain call of the target shared network.
  • MMEC and PLMN ID information in GUTI are examples of the MME registered by the UE in the original network LTE or 4G network.
  • the first MSC of the target shared network sends the CS domain to the UE before the CS domain call process of the target shared network ends.
  • TMSI and LAI wherein the TMSI includes an NRI of a CS domain, the NRI of the CS domain is the same as the MMEC of the UE in the GUTI of the original network PS domain, the LAI includes a PLMN ID, and the PLMN in the LAI The ID is the same as the PLMN ID in the GUTI, so that the UE carries the TMSI and the LAI in a registration request message of a CS domain sent to a base station of the target shared network.
  • step 1002 can be referred to the foregoing step 901, which is not repeatedly described in the embodiment of the present invention.
  • the first scenario SRVCC scenario.
  • the MME of the original LTE or 4G network registered by the UE selects the first MSC of the target shared network to assist the UE to complete according to its interface condition or its own selection policy.
  • a call of the target shared network is initiated, and a handover request message of the PS domain handover to the CS domain is initiated to the first MSC.
  • the handover request message carries the MMEC and the PLMN ID of the UE in the GUTI of the original network PS domain.
  • the MME that is registered by the user equipment UE in the original LTE or 4G network selects the first MSC of the target shared network according to the interface status of itself or its own policy.
  • the MME sends a handover request message of the PS domain to the CS domain to the first MSC, where the handover request message carries the MMEC and the PLMN ID of the UE in the GUTI of the PS domain of the original network.
  • the MME may directly carry the MMEC and the PLMN ID of the UE in the GUTI of the original network PS domain in the handover request message of the PS domain to the CS domain sent by the first MSC, where the MME
  • the P-TMSI and the RAI of the UE may be carried in the handover request message, where the P-TMSI carries the MMEC, and the RAI carries the PLMN ID in the GUTI.
  • the P-TMSI and the RAI are mapped by a GUTI allocated by the MME registered by the UE in the original LTE or 4G network.
  • the first MSC accepts a handover request message that the PS domain sent by the MME switches to the CS domain.
  • the first MSC re-allocates the TMSI and the LAI to the UE, where the NRI in the TMSI is the MMEC in the GUTI allocated by the UE in the original PS domain, and the PLMN ID in the LAI is the PLMN in the GUTI. ID.
  • the second scenario the user equipment UE acts as a CSFB process triggered by the called party.
  • the first MSC receives a paging request message sent by another network element.
  • the other network element is a related network element of the network where the UE is located.
  • the first MSC receives the other network element to send. Page request message.
  • the first MSC sends a paging request message to an MME where the called UE is located.
  • the MME forwards the paging request message to the called UE by using a base station.
  • the MME sends a service request message to the first MSC, and carries the MMEC and the PLMN ID of the called UE.
  • the service request message sent by the MME to the first MSC is used to notify the first MSC of the connection status of the called UE, so that the first MSC stops paging the called UE.
  • the MME may directly carry the MMEC and the PLMN ID of the UE in the GUTI of the PS domain of the original network in the service request message, and the MME may also be in the service request message in an indirect manner.
  • the called UE sends a service extension request to the MME by using a base station, and triggers CSFB.
  • the first MSC re-allocates the TMSI and the LAI to the called UE, where the NRI in the TMSI is the same as the MMEC, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the third case the CSFB process triggered by the UE as the calling party.
  • the calling UE sends a service extension request message to the MME, and triggers CSFB.
  • the MME sends a calling CSFB indication message to the first MSC, where the calling CSFB indication message carries the MMEC and the PLMN ID of the UE in the GUTI of the PS domain of the original network.
  • the calling CSFB indication message sent by the MME to the first MSC is used to indicate that the service request message subsequently received by the first MSC is caused by the calling CSFB.
  • the MME may directly
  • the calling CSFB indication message carries the MMEC and the PLMN ID of the UE in the GUTI of the original PS domain.
  • the MME may also carry the foregoing in the calling CSFB indication message by using an indirect carrying method.
  • a PS domain temporary mobile subscriber identity P-TMSI and a routing area identifier RAI of the UE where the P-TMSI carries the MMEC, the RAI carries the PLMN ID, and the P-TMSI and the RAI are Mapped by the GUTI.
  • the first MSC redistributes TMSI and LAI for the called UE.
  • the NRI in the TMSI is the same as the MMEC, and the PLMN ID in the LAI is the same as the PLMN ID in the GUTI.
  • the UE may be before the end of the CS domain call of the target shared network, that is, before the UE initiates the CS domain registration process on the target shared network.
  • the MMEC in the same is the same, the PLMN ID in the LAI redistributed by the first MSC to the UE is the same as the PLMN ID in the GUTI allocated by the MME in the original network PS domain.
  • the UE in the location area update request message initiated by the CS domain carries the TMSI and the LAI re-allocated by the MSC1, and the UE carries the UE in the original PS domain in the routing area update request message initiated by the PS domain.
  • P-TMSI and RAI of the GUTI mapping wherein the TMSI is the same as the network resource identifier of the CS domain carried in the P-TMSI and the network resource identifier of the PS domain, and is the MMEC in the GUTI.
  • the LAI and the PLMN ID carried in the RAI are the same, and are the PLMN IDs in the GUTI.
  • the target shared network is the same as the operator of the CS domain selected by the UE and the operator of the PS domain.
  • the operator of the PS domain registered by the UE in the original LTE or 4G network if the UE registered in the original LTE or 4G network is not available in the target shared network, the target shared network is the operation of the CS domain selected by the UE.
  • the quotient is consistent with the operator of the PS domain, and is the operator that the base station reselects for the UE through the preset policy and the IMSI of the UE.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the target shared network selects a CS domain operator and a PS domain operation of the target shared network according to the MMEC and the PLMN ID in the GUTI.
  • the CS domain operation that the UE registers with the target shared network is the same as the PS domain operator.
  • the LAI The PLMN ID is included, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the problem that the UE switches from the LTE or 4G network through the SRVCC or the CSFB to the shared 2G or 3G network in the prior art, and there is no RPLMN in the process. The problem that comes with it.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the execution method of the method is UE, in conjunction with FIG. 14, the method includes:
  • the UE When the user equipment UE is handed over to the target shared network by using the SRVCC or the CSFB, the UE receives the TMSI of the CS domain sent by the first MSC of the target shared network before the CS domain call process of the target shared network ends.
  • an LAI where the TMSI includes an NRI of a CS domain, the NRI of the CS domain is the same as an MMEC of the UE in a GUTI of a PS domain of an original network, the LAI includes a PLMN ID, and a PLMN in the LAI The ID is the same as the PLMN ID in the GUTI.
  • the UE sends a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain carries the TMSI and the LAI.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the target shared network selects a CS domain operator and a PS domain operation of the target shared network according to the MMEC and the PLMN ID in the GUTI.
  • the CS domain operation that the UE registers with the target shared network is the same as the PS domain operator.
  • the LAI since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the existing In the technology, the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network, and there is no problem caused by the RPLMN in the process.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the execution method of the method is Before the UE switches to the target shared network, the MME registered in the original LTE or 4G network, in conjunction with FIG. 15, the method includes:
  • the MME When the UE is handed over to the target shared network by using the SRVCC or the CSFB, the MME sends the PS of the UE in the original network to the first MSC of the target shared network before the CS domain call process of the target shared network ends.
  • the MME is a core network element registered by the UE in the PS domain of the original network, so that the first MSC before the UE sends a registration request message of the CS domain Transmitting, to the UE, a TMSI and a LAI of a CS domain, where the TMSI includes an NRI of a CS domain, an NRI of the CS domain is the same as an MMEC in the GUTI, and the LAI includes a PLMN ID, where the LAI is The PLMN ID is the same as the PLMN ID in the GUTI.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the target shared network selects the same target shared network CS domain operator and PS according to the MMEC and the PLMN ID in the GUTI.
  • the domain operator solves the problem that the CS domain operator registered by the UE on the target shared network is inconsistent with the PS domain operator.
  • the LAI since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the existing In the technology, the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network, and there is no problem caused by the RPLMN in the process.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator. Referring to FIG. 16, the method includes:
  • the MME registered by the UE in the original network PS domain to the target shared network The first MSC transmits the MMEC and PLMN ID in the GUTI allocated to the UE.
  • the first MSC re-allocates a TMSI and an LAI to the UE, where an NRI in the TMSI is the same as an MMEC in the GUTI, and a PLMN ID in the LAI is the same as a PLMN ID in the GUTI. .
  • the UE sends a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain carries the re-allocated TMSI and LAI, and the registration request message of the CS domain is LAU request message.
  • the shared network in this application refers to a 2G or 3G network.
  • the base station determines, according to the NRI in the TMSI, whether a correspondence between the NRI and an operator is stored.
  • the base station after receiving the LAU request message, the base station does not identify the PLMN ID information in the LAI carried in the request message, and can only identify the NRI information of the CS domain in the TMSI, and The base station cannot directly determine, according to the CS domain NRI information, which operator the operator that allocates the CS domain NRI is, and can only determine whether the NRI and the operation of the CS domain are stored according to the NRI information of the CS domain.
  • the corresponding relationship of the quotient if any, the base station can determine the operator registered by the UE in the original network CS domain according to the correspondence, and if not, the base station cannot determine the operator registered by the UE in the original network CS domain.
  • the base station may store the corresponding relationship between the NRI of the CS domain and the operator. For example, if the UE is registered in the CS domain of the target shared network, it is assumed that the registered CS domain operator is the operator one. The operator allocates the TMSI and the LAI to the UE, and the base station of the target shared network stores the correspondence between the CS domain NRI and the operator one in the TMSI. When the UE switches from the registered LTE or 4G network to the shared 2G or 3G network, the base station receives the LAU request message sent by the UE, where the LAU request message carries the operator-assigned TMSI and LAI, and the base station determines that the TMSI is stored. The correspondence between the CS domain NRI and the operator one.
  • the base station of the target shared network does not store the correspondence between the CS domain NRI and the operator, that is, the base station of the target shared network cannot according to the NRI information of the CS domain in the LAU request message of the UE. , judging that the CS domain NRI is Which operator is assigned.
  • the base station sends a registration request message of the CS domain to a second MSC corresponding to the operator.
  • the second MSC accepts a registration request message of the CS domain, and sends an accept response message to the UE.
  • the second MSC may obtain the NRI information of the CS domain in the TMSI in the LAU request message, and the PLMN ID information in the LAI, where the MSC1 determines the NRI information of the CS domain and the The PLMN ID is assigned by the operator to which it belongs, and the MSC1 accepts the LAU request message and sends an accept response message to the UE.
  • the second MSC when the second MSC receives After the LAU request message, it may be determined whether the CS domain NRI information in the LAU request message is allocated by the operator to which the UE belongs, or may only determine whether the PLMN ID in the LAU request message is assigned by the operator to which the LAU request message belongs. And determining, by the OC1, whether the CS domain NRI and/or the PLMN ID in the LAU request message are allocated by the own operator. There may be many ways, which are not described in detail in the embodiments of the present invention.
  • the base station sends a registration request message of the CS domain to a third MSC connected to the base station, where the third MSC is an MSC connected to the base station, and the third MSC
  • the base station is randomly selected according to a preset policy.
  • the third MSC determines, according to the PLMN ID in the LAI in the registration request message of the CS domain or the NRI in the TMSI, whether the PLMN ID and the operator corresponding to the NRI are carriers to which the UE belongs.
  • the third MSC accepts the registration request message of the CS domain, and sends an accept response message to the UE.
  • the third MSC sends a rerouting message to the UE.
  • the rerouting message carries information such as an NRI, a PLMN ID, and an IMSI of the UE.
  • the base station determines whether an NRI corresponding to the re-routing message and an operator corresponding to the PLMN ID are available in the target shared network.
  • the base station when the base station can only obtain the NRI information of the CS domain, if the base station does not store the correspondence between the NRI and the operator in the TMSI, the base station cannot determine the allocation only according to the NRI information of the CS domain.
  • Which operator is the operator of the NRI information of the CS domain, and when the base station simultaneously acquires the NRI information of the CS domain and the PLMN ID information, the base station may determine the allocation of the CS domain by combining the two.
  • Which operator is the NRI information and the operator of the PLMN ID information, that is, the operator registered by the UE in the original network CS domain, and whether the operator is available in the target shared network.
  • the base station sends a registration request message of the CS domain to a fourth MSC corresponding to the operator.
  • the base station determines, according to the NRI information of the CS domain and the PLMN ID information, that the operator that allocates the NRI information of the CS domain and the PLMN ID information is the operator one, the base station will The LAU request message is sent to a fourth MSC corresponding to the operator, and the fourth MSC accepts the LAU request message and sends an accept response message to the UE.
  • the fourth MSC may accept the request message by determining that the CS domain NRI and the PLMN ID corresponding to the operator in the request message are the operator to which the fourth MSC belongs, and further, the base station is transmitting the LAU request message.
  • the IMSI of the UE may also be carried in the message, indicating that the rerouting procedure has been performed, the fourth MSC directly accepts the request message according to the IMSI in the request message, or the base station is transmitting a LAU request message.
  • the instruction of the fourth MSC to receive the LAU request message is carried out. It can be understood that the process of the fourth MSC accepting the LAU request message may be multiple, which is not repeatedly described in the embodiment of the present invention.
  • the fourth MSC accepts a registration request message of the CS domain, and sends an acceptance response message to the UE.
  • the base station reselects a CS domain operator for the UE according to the IMSI of the UE.
  • the base station reselects a CS domain operator for the UE according to the IMSI of the UE, and assumes that it is the operator 2, and sends the LAU request message to the operator.
  • the MSC sends an accept response message to the UE.
  • the registration process of the UE in the PS domain is not implemented.
  • the network side performs the MMEC and the PLMN ID in the GUTI allocated by the MME for the UE.
  • the UE selects the CS domain operator, and the selection process may refer to steps 1603 to 1604, except that the core network element that accepts the PS domain registration request message of the UE is the SGSN of the target shared network.
  • the target shared network selects the CS domain operator and the PS domain operator of the same target shared network for the UE according to the MMEC and the PLMN ID in the GUTI, thereby solving the CS domain operator domain PS domain operation of the UE registered in the target shared network. Inconsistent issues. Moreover, since the first MSC allocates an LAI to the UE during the UE call, the LAI includes a PLMN ID, and the UE can acquire the RPLMN according to the PLMN ID, thereby solving the existing In the technology, the UE switches from the LTE or 4G network through the SRVCC or CSFB to the shared 2G or 3G network, and there is no problem caused by the RPLMN in the process.
  • the operator of the target shared network CS domain and the PS domain are inconsistent, and the embodiment of the present invention provides a target shared network CS domain and PS domain.
  • the method of the operator, the executor of the method is the first SGSN of the target shared network
  • the scenario applied by the method is a scenario in which the user equipment UE is jointly registered in the PS domain and the CS domain of the original network. Referring to FIG. 17, the method includes:
  • the first SGSN of the target shared network receives a registration request message of a PS domain sent by a base station of the target shared network.
  • the registration request message of the PS domain is a PS domain registration request message sent by the UE on the target shared network, and may be an RAU request message or an attachment request message of the PS domain.
  • the first SGSN sends a context request message to the first core network element, where the context request message carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original network CS.
  • the first SGSN After the first SGSN receives the registration request message of the PS domain, the first SGSN does not determine whether to accept the registration request message of the PS domain or send a rerouting command to the base station of the shared network.
  • the first SGSN sends the context request information to the first core network element, where the context request information carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE in the original network CS domain. NRI information and PLMN ID information.
  • the joint registration refers to that after the user equipment UE registers in the PS domain of the LTE or 4G network, the registered MME triggers an MSC of the 2G or 3G network to complete the CS domain of the UE in the 2G or 3G network.
  • the registered SGSN triggers an MSC of the network to complete the CS domain registration process of the UE in the network.
  • the jointly registered MME or SGSN can learn the registration message of the UE on the MSC, for example, the TMSI and LAI information allocated by the MSC for the UE, and the jointly registered MSC can also acquire the UE on the MME or the SGSN.
  • the registration message such as the GUTI allocated by the MME for the UE, or the P-TMSI and the RAI allocated by the SGSN to the UE.
  • the first SGSN receives a context request response message sent by the first core network element, where the context request response message carries the UE in the original network. NRI information and PLMN ID information of the CS domain.
  • the first SGSN determines, according to the NRI information and the PLMN ID information of the UE in the original network CS domain, whether to accept the registration request message of the PS domain.
  • the first SGSN determines whether the NRI information of the UE in the CS domain of the original network and the operator corresponding to the PLMN ID information are carriers to which the UE belongs.
  • the first SGSN accepts the registration request message of the PS domain, and sends an accept response message to the UE. If not, the first SGSN sends a re-routing message to the base station, where the re-routing message carries NRI information, PLMN ID information, and IMSI information of the UE in the CS domain of the original network.
  • the first SGSN sends a rerouting command message to the base station, so that the base station selects the UE according to the NRI and PLMN ID of the original CS domain in the rerouting command message.
  • the operator registered by the UE in the target shared network is the operator registered by the UE in the original network CS domain;
  • the operator registered in the original network CS domain is not available in the target shared network, and the UE registered in the target shared network is the base station of the target shared network, according to the IMSI of the UE, and a preset algorithm, for the UE. Re-elected operators.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator.
  • the first SGSN of the PS domain of the target shared network After receiving the registration request message of the UE in the PS domain, the first SGSN of the PS domain of the target shared network
  • the first core network element sends a context request message to obtain the NRI and the PLMN ID of the UE in the original CS domain.
  • the network element of the target shared network is in accordance with the UE.
  • the NRI and the PLMN ID of the CS domain select the same PS domain and the CS domain operator for the UE, thereby solving the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE in the prior art may not The same problem.
  • Embodiments of the present invention provide a CS domain and a PS domain operation for selecting a target shared network.
  • the method of the method, the method is performed by the first core network element, and the first core network element is a core network element registered in the original PS domain before the UE switches to the target shared network, and the method is combined with FIG. 18 include:
  • the first core network element receives the context request message sent by the first SGSN of the target shared network, where the context request information carries a first identifier, where the first identifier is used to indicate that the first SGSN requests to acquire the UE.
  • the first core network element sends a context request response message to the first SGSN according to the first identifier in the context request message, where the context request response message carries the UE in the original network CS.
  • the NRI information of the domain and the PLMN ID information so that the first SGSN determines whether to accept the registration request information of the PS domain according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • the first core network element Before receiving the context request message sent by the first SGSN, the first core network element needs to acquire the NRI information and the PLMN ID information of the UE in the original network CS domain by using the joint registration.
  • the embodiment of the present invention provides a core network element, where the target shared network side selects the same target shared network CS domain operator and PS domain operator for the UE according to the NRI and the PLMN ID of the UE in the original network CS domain. Therefore, the problem that the CS domain operator and the PS domain operator selected by the target network for the user equipment UE in the prior art may be different may be solved.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the method is combined with FIG. include:
  • the UE sends a registration request message of the PS domain to the base station of the target shared network, where the registration request message of the PS domain is an attach request message or a routing area update. RAU request message.
  • the base station sends a registration request message of the PS domain to a first SGSN of the target shared network.
  • the first SGSN sends a context request message to the first core network element, where the context request information carries a second identifier, where the second identifier is used to indicate that the first SGSN requests to acquire the UE in the original network CS.
  • NRI information and PLMN ID information of the domain are used to indicate that the first SGSN requests to acquire the UE in the original network CS.
  • the first core network element may be represented by a second SGSN or MME.
  • the first core network element sends a context request response message to the first SGSN, where the context request response message carries NRI information and PLMN ID information of the UE in the original network CS domain.
  • the first SGSN determines whether the NRI information of the UE in the CS domain of the original network and the operator corresponding to the PLMN ID information are carriers to which the UE belongs.
  • the first SGSN accepts a registration request message of the PS domain, and sends an accept response message to the UE.
  • the first SGSN sends a re-routing message to the base station, where the re-routing message carries NRI information, PLMN ID information, and IMSI information of the UE in the original network CS domain.
  • the base station determines whether the NRI and the operator corresponding to the PLMN ID are operators of the target shared network.
  • the base station selects a third SGSN corresponding to the operator for the UE, and sends a registration request message of the PS domain to the third SGSN.
  • the third SGSN accepts a registration request message of the PS domain and sends an acceptance response message to the UE.
  • the base station reselects the PS domain operator for the UE according to the IMSI of the UE.
  • the registration process of the UE in the CS domain is not reflected, and the UE is at the target.
  • the target shared network selects a CS domain operator for the UE according to the NRI information and the PLMN ID information of the UE in the original network CS domain.
  • An embodiment of the present invention provides a method for selecting a CS domain and a PS domain operator of a target shared network, by which the base station selects the same CS domain for the UE according to the NRI and the PLMN ID of the original CS domain.
  • the operator and the PS domain operator solve the problem that the CS domain and the PS domain operator selected by the target network for the user equipment UE in the prior art may be inconsistent.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the execution method of the method is The first MSC of the target shared network, in conjunction with FIG. 20, the method includes:
  • the first MSC of the target shared network receives the registration request message of the CS domain sent by the base station of the target shared network.
  • the registration request message of the CS domain is a CS domain registration request message sent by the UE on the target shared network, and may be a LAU request message or an attachment request message of the CS domain.
  • the first MSC determines, according to the NRI information or the MMEC information of the original network packet switched PS domain, and the PLMN ID information, according to the user equipment UE that sends the CS domain registration request message, whether to accept the registration request message of the CS domain.
  • the LTE or 4G network since the LTE or 4G network is in the initial stage of construction, in general, the LTE or 4G network only supports data services, and the user's call service still needs to be returned to the traditional 2G or 3G network. At this time, there is a case where the UE may be jointly registered with an MME sharing a 2G or 3G network in an MME of an LTE or 4G network.
  • the registered MME allocates a GUTI to the UE, and the registered MSC is The UE allocates the TMSI and the LAI, where the TMSI includes the CS domain NRI information, and the LAI includes the PLMN ID information, and the base station of the network where the MSC is located stores the correspondence between the NRI and the operator to which the MSC belongs.
  • the CS domain and the PS domain are initiated within the network.
  • the registration process after receiving the CS domain registration request message, the base station can determine the correspondence between the NRI and the operator according to the NRI information in the TMSI, and send the CS domain registration request message to the operator.
  • the MSC that is, the first MSC that receives the CS domain registration request information sent by the UE may be the MSC that the UE was previously registered with.
  • the first MSC After the first MSC receives the CS domain registration request message sent by the UE, the first MSC has acquired the registration message of the UE on the MME, that is, the MMEC in the GUTI allocated by the MME to the UE. And the PLMN ID, the first MSC determines, according to the MMEC and the PLMN ID, whether to accept the CS domain registration request message sent by the UE.
  • the first MSC accepts the registration request message of the CS domain, and sends an accept response message to the UE;
  • the first MSC sends a re-routing message to the base station, where the re-routing message carries the MMEC information, the PLMN ID information of the UE in the PS domain of the original network, and the International Mobile Subscriber Identity (IMSI) of the UE. information.
  • IMSI International Mobile Subscriber Identity
  • the receiving the first MSC is not the MSC that is jointly registered before the UE
  • the first MSC needs to register with the UE in the original network CS domain after receiving the CS domain registration request.
  • the MSC obtains the NRI or MMEC information of the UE in the original network PS domain, and the PLMN ID information.
  • the acquisition process can be seen in FIG. 21, including:
  • the first MSC determines whether the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information are stored.
  • the first MSC sends a context request message to the second core network element, where the context request message carries a second identifier, where the second identifier is used to indicate that the first MSC requests to obtain the location.
  • the context request message carries a second identifier, where the second identifier is used to indicate that the first MSC requests to obtain the location.
  • the first MSC After the first MSC receives the registration request message of the CS domain, the first MSC does not determine whether to accept the registration request message of the CS domain or send a rerouting command to the base station of the target shared network. After the first MSC determines that the NRI information or the MMEC information of the UE in the original network PS domain and the PLMN ID information are not stored, the first MSC sends the context request information to the second core network element, The context request information carries a second identifier, where the second identifier is used to indicate that the first MSC requests to acquire NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information.
  • the first MSC receives a context request response message sent by the second core network element, where the context request response message carries NRI information or MMEC information of the UE in a PS domain of the original network, and PLMN ID information.
  • the second core network element can obtain the registration message of the UE on the MME or SGSN registered in the original network PS domain, that is, the second core, in the case that the UE is jointly registered in the CS domain and the PS domain of the original network.
  • the network element can obtain the P-TMSI and the RAI allocated by the GUTI or SGSN allocated by the MME registered by the UE in the original network.
  • the second core network element sends a context request response message to the first MSC according to the second identifier, where the context request response information carries the P-TMSI and the RAI of the UE in the original network PS domain.
  • the context request response information carries the P-TMSI and the RAI of the UE in the original network PS domain.
  • the first MSC determines NRI information or MMEC information of the UE in the original network PS domain, and whether the operator corresponding to the PLMN ID information is an operator to which the UE belongs.
  • the first MSC accepts the registration request message of the CS domain, and sends an accept response message to the UE.
  • the first MSC sends a re-routing message to the base station, where the re-routing message carries NRI information or MMEC information, PLMN ID information, and IMSI information of the UE in the original network PS domain.
  • the first MSC sends a rerouting command message to the base station, so that the base station according to the NRI information or the MMEC information of the UE in the PS domain of the original network according to the rerouting command message, and the PLMN ID is The UE selects a corresponding operator, or causes the base station to reselect an operator for the UE according to the IMSI of the UE.
  • the target shared network is the operator selected by the UE in the CS domain and the operator selected in the PS domain are all the UE in the original.
  • An operator registered in the network PS domain if the UE registered in the original network PS domain is not available in the target shared network, the base station is registered in the CS domain registration process of the UE or in the PS domain of the UE. The process re-selects the operator for the UE according to the IMSI of the UE. Since the IMSI of the UE is unique, the reselection policies are consistent (for example, all are IMSI hash algorithms), so the reselected PS domain and CS are performed. The operators of the domain are also consistent.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, in which the first MSC of the PS domain of the target shared network receives the registration request message of the UE in the CS domain of the CS domain. After that, it is determined whether the UE registers the registration message of the UE in the original network PS domain, and if not, sends a context request message to the second core network element to obtain the NRI or MMEC information of the UE in the original PS domain, and the PLMN ID information.
  • the network element of the target shared network selects the CS domain operator and the PS domain operator for the UE according to the NRI/MMEC and the PLMN ID of the UE in the original network PS domain.
  • the operators that register the UE in the target shared network are the same, are the operators registered in the original network PS domain, or all the operators that the target shared network base station reselects for the UE. Therefore, the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art is solved.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the execution method of the method is a second core network element, wherein The second core network element is a core network element that is registered in the original network CS domain before the UE switches to the target shared network.
  • the method includes:
  • the second core network element that sends the registration request message of the CS domain in the target shared network receives the context request message sent by the first MSC of the target shared network, where the context request information carries the second identifier, where the second identifier is And indicating that the first MSC requests to acquire NRI information or MMEC information of the UE in the PS domain of the original network, and PLMN ID information.
  • the second core network element sends a context request response message to the first MSC according to the second identifier in the context request message, where the context request response message carries the UE in the original network PS.
  • the NRI information or the MMEC information of the domain, and the PLMN ID information so that the first MSC determines whether to receive the registration request message of the CS domain according to the NRI information or the MMEC information of the UE in the PS domain of the original network, and the PLMN ID information. .
  • the second core network element acquires a registration message of the UE in the original network PS domain in the process of the joint registration, that is, the MMEC in the GUTI allocated by the registered MME for the UE. And the PLMN ID information, or the NRI information in the P-TMSI allocated by the registered SGSN for the UE and the PLMN ID information in the RAI.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the target shared network selects the same target for the UE according to the NRI or MMEC of the original network PS domain and the PLMN ID.
  • the CS domain operator and the PS domain operator of the shared network solve the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art.
  • the embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, and the method is combined with FIG. 23 Includes:
  • the user equipment UE sends a registration request message of the CS domain to the base station of the target shared network, where the registration request message of the CS domain is an attach request message or a LAU request message.
  • the base station sends a registration request message of the CS domain to a first MSC of the target shared network.
  • the first MSC determines whether a registration message of the UE in the original network PS domain is stored. If not, the first MSC sends a context request message to the second core network element, where the context request information carries the first And the first identifier is used to indicate that the first MSC requests to acquire NRI or MMEC information of the UE in the original network PS domain, and PLMN ID information.
  • the second core network element is represented by a second MSC.
  • the second core network element sends a context request response message to the first MSC, where the context request response message carries NRI information or MMEC information of the UE in the original network PS domain, and PLMN ID information.
  • the first MSC determines whether the UE is in the NRI or MMEC of the original network PS domain, and whether the operator corresponding to the PLMN ID information is an operator to which the UE belongs.
  • the first MSC accepts the registration request message of the CS domain, and sends an acceptance response message to the UE.
  • the first MSC sends a re-routing message to the base station, where the re-routing message carries the NRI or MMEC, PLMN ID information of the UE in the original network PS domain, and the IMSI information of the UE.
  • the base station determines whether the NRI or MMEC, and an operator corresponding to the PLMN ID, is an operator of the target shared network.
  • the base station selects a third MSC corresponding to the operator for the UE, and sends a registration request message of the CS domain to the third MSC.
  • the third MSC accepts a registration request message of the CS domain and sends an accept response message to the UE.
  • the base station is heavy for the UE according to the IMSI of the UE. Select the CS domain operator.
  • the embodiment shown in FIG. 23 does not show the PS domain registration process of the UE in the target shared network.
  • the target shared network side is based on the NRI or MMEC of the UE in the original network PS domain, and the PLMN ID is the UE. Select the carrier of the PS domain.
  • An embodiment of the present invention provides a method for selecting a target shared network CS domain and a PS domain operator, where the target shared network selects the same target for the UE according to the NRI or MMEC of the original network PS domain and the PLMN ID.
  • the CS domain operator and the PS domain operator of the shared network solve the problem that the CS domain operator and the PS domain operator selected by the target shared network for the user equipment UE may be different in the prior art.
  • the embodiment of the present invention provides a communication system, which is applied to the UE to switch through SRVCC or CSFB.
  • the LTE/4G network and the target shared network may be overlapped or non-overlapping, which is not limited by the embodiment of the present invention.
  • the communication system includes an MSC, a UE, and an MME.
  • MSC mobile station
  • UE mobile station
  • MME mobile station
  • the detailed technical features of the MSC in the communication system refer to the corresponding embodiment of any one of FIG. 1 and FIG. 9 to FIG. 13.
  • the detailed technical features of the UE can be referred to any one of FIG. 2 and FIG.
  • the detailed technical features of the MME refer to the corresponding embodiments in any of the embodiments of FIG. 3 and FIG.
  • the embodiment of the present invention further provides a communication system, where the communication system includes an SGSN of a target shared network and a first core network element, where the first core network element is the UE handover.
  • the core network element registered in the original network PS domain is applied to the scenario where the UE is jointly registered in the PS domain of the original network CS domain.
  • the detailed technical features of the SGSN can be referred to the corresponding embodiment in any of the foregoing FIG. 4 and FIG. 17.
  • the detailed technical features of the second core network element can be seen in the figure. 5 and FIG. 18 corresponding to the embodiment, the embodiment of the present invention will not be described again.
  • the embodiment of the present invention further provides a communication system, where the communication system is applied to a scenario in which a UE is jointly registered in a CS domain and a PS domain of an original network, where the communication system includes: an MSC and a second core network. yuan.
  • the original network and the target shared network may or may not overlap, which is not limited by the embodiment of the present invention.
  • the embodiment of the present invention provides a communication system, in which the registration information of the UE in the original network PS domain, including the PS domain NRI or MMEC, and the PLMN ID, the CS domain operator and the PS domain operator that select the target shared network for the UE, Or, by using the registration information of the UE in the original network CS domain, including the CS domain NRI and the PLMN ID, selecting the CS domain operator and the PS domain operator of the target shared network for the UE, so that the CS domain operator registered by the UE in the target shared network
  • the same as the PS domain operator which solves the problem that the CS domain operator and the PS domain operator registered by the UE in the target shared network are inconsistent.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon des modes de réalisation, la présente invention concerne un procédé et un appareil associé pour la sélection d'opérateurs de domaine à commutation de circuits (domaine CS) et de domaine à commutation de paquets (PS) du réseau de partage cible, et permettant de résoudre le problème d'incohérence d'enregistrement d'opérateurs de domaine CS et d'opérateurs de domaine PS après la commutation d'un équipement utilisateur (UE) vers le réseau de partage cible. Le procédé comprend les étapes suivantes: lorsque l'équipement utilisateur commute vers le réseau de partage cible à travers une continuité d'appel vocal radio unique (SRVCC) ou un repli sur commutation de circuits (CSFB), avant la fin des appels de l'équipement utilisateur dans le domaine CS, un premier centre de commutation mobile (MSC) du réseau de partage cible reçoit le codage d'entité de gestion d'entité de mobilité (MMEC) et l'identifiant de réseau mobile terrestre public (PLMN ID) de l'équipement utilisateur (UE) transmis par une entité de gestion de mobilité (MME); le premier centre MSC transmet l'identifiant d'abonné mobile temporaire (TMSI) et l'identifiant de zone de localisation (LAI) du domaine CS à l'équipement utilisateur, l'identifiant TMSI comprend l'identifiant de ressource de réseau (NRI) du domaine CS à l'équipement utilisateur, le codage MMEC est le même que l'identifiant NRI, l'identifiant LAI contient un identifiant PLMN ID, l'identifiant PLMN ID dans l'identifiant LAI est le même que l'identifiant PLMN ID reçu par le premier centre MSC, afin que l'équipement utilisateur transmette le message de demande d'enregistrement comportant l'identifiant TMSI et l'identifiant LAI du domaine CS à la station de base du réseau de partage de la cible réseau. Le procédé s'applique au domaine technique des communications.
PCT/CN2014/086962 2014-09-19 2014-09-19 Procede et appareil associe pour la selection d'operateurs de domaine a commutation de circuits et de domaine a commutation de paquets de reseau de partage cible Ceased WO2016041208A1 (fr)

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CN201480082075.7A CN106688281A (zh) 2014-09-19 2014-09-19 选择目标共享网络的cs域和ps域运营商的方法及相关装置

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