WO2016183729A1 - Procédé, système et dispositif de réalisation de service volte - Google Patents

Procédé, système et dispositif de réalisation de service volte Download PDF

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Publication number
WO2016183729A1
WO2016183729A1 PCT/CN2015/079068 CN2015079068W WO2016183729A1 WO 2016183729 A1 WO2016183729 A1 WO 2016183729A1 CN 2015079068 W CN2015079068 W CN 2015079068W WO 2016183729 A1 WO2016183729 A1 WO 2016183729A1
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WIPO (PCT)
Prior art keywords
message
core network
network element
proxy device
request
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PCT/CN2015/079068
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English (en)
Chinese (zh)
Inventor
严凯
李明
胡钰舒
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to PCT/CN2015/079068 priority Critical patent/WO2016183729A1/fr
Priority to CN201580072139.XA priority patent/CN107251609B/zh
Publication of WO2016183729A1 publication Critical patent/WO2016183729A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/142—Reselecting a network or an air interface over the same radio air interface technology

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, system, and device for implementing a VoLTE service.
  • the base station In the second generation (2 nd generation, 2G) mobile communication network and the third generation (3 rd generation, 3G) mobile communication network, the base station simultaneously accesses the core network circuit domain and the packet domain, as shown in FIG. 1 .
  • the voice service accesses the core network circuit domain through the base station, and the called network number is analyzed by the core network circuit domain, and the voice service is connected to the called number.
  • IP Internet Protocol
  • an IP data service channel is established by the core network packet domain, and the IP data service is connected to a corresponding IP data service network, such as the Internet or a private network.
  • the short message service and the voice intelligent network service are all responsible for dredging by the core network circuit domain.
  • the fourth generation (4 th Generation, 4G) mobile communication network an evolved base station (evolved NodeB, eNB) only access an evolved packet core network (Evolved Packet Core, EPC), shown in Figure 2, the EPC service gateway comprising (Serving Gateway, SGW) and Packet Date Network Gateway (PGW), which may also include a Mobility Management Entity (MME).
  • EPC evolved Packet Core
  • SGW Serving Gateway
  • PGW Packet Date Network Gateway
  • MME Mobility Management Entity
  • the 4G network has only a Packet Switch Domain (PS Domain) and no Circuit Switched Domain (CS Domain).
  • PS Domain Packet Switch Domain
  • CS Domain Circuit Switched Domain
  • VoLTE Voice over LTE
  • LTE Long Term Evolution
  • IMS Multimedia Subsystem
  • the voice service accesses the IMS through the IP data channel in the EPC, and the IMS analyzes the called number, connects the call to the called user, and the IMS is responsible for voice service control.
  • IMS-based VoLTE requires the deployment of an IMS system.
  • the deployment of the IMS system involves multiple network elements and interfaces, which makes the deployment of the IMS system affect the deployment progress of the VoLTE.
  • the embodiments of the present invention provide a method, a system, and a device for implementing a VoLTE service, which are used to overcome the problem that the deployment of the IMS system affects the deployment progress of the VoLTE in the existing implementation of the VoLTE service.
  • the first aspect provides a proxy device, where the proxy device is respectively connected to a circuit switched domain CS core network element, a base station eNB, and a mobility management entity MME, where the proxy device includes a communication module and a processing module;
  • the communication module is configured to acquire, according to the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling of the eNB or the MME;
  • LTE Long Term Evolution
  • the processing module is configured to convert the VoLTE bearer related signaling obtained by the communications module into CS voice bearer related signaling that can be processed by the CS core network NE;
  • the communication module is configured to send the CS voice bearer related signaling that is converted by the processing module to the CS core network element;
  • the communication module is configured to acquire CS voice bearer related signaling of the CS core network element
  • the processing module is configured to convert the CS voice bearer related signaling acquired by the communications module into a voice VoLTE bearer related signaling based on Long Term Evolution (LTE);
  • LTE Long Term Evolution
  • the communication module is configured to send the VoLTE bearer related signaling that is converted by the processing module to the eNB or the MME.
  • the communications module is further configured to:
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the communication module is further configured to:
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the communications module is further configured to:
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • connection management request related signaling Transmitting, by the processing module, the connection management request related signaling to the CS core network element, and receiving the radio access bearer returned by the CS core network element according to the connection management request related signaling RAB allocation request message;
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the communication module is further configured to:
  • the ringing message sent by the CS core network element is received;
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the SIP signaling that is obtained by converting the processing module to the called party to play back ringing tone is sent to the UE by the eNB.
  • the communication module is further configured to:
  • connection management request related signaling After the connection management request related signaling is sent to the CS core network element, receiving a message that the current call returned by the CS core network element is being processed;
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • connection confirmation message received by the communication module into a connection message that can be processed by the CS core network element
  • the communication module is specifically configured to:
  • the processing module is specifically configured to:
  • the communication module is specifically configured to:
  • the communications module is further configured to:
  • the processing module is further configured to:
  • the communication module is further configured to:
  • the proxy device is integrated in a radio network controller RNC or a serving gateway SGW.
  • a mobility management entity MME including:
  • a receiving module configured to receive a long-term evolution LTE-based voice VoLTE bearer-related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer related signaling of the proxy device to the circuit switched domain CS core network network element Conversion obtained;
  • a sending module configured to send, to the proxy device, VoLTE bearer related signaling of the user equipment UE.
  • the processing module is further included;
  • the receiving module is specifically configured to:
  • the processing module is specifically configured to:
  • the sending module is specifically configured to:
  • the receiving module is specifically configured to:
  • the processing module is specifically configured to:
  • the sending module is specifically configured to:
  • a bearer setup response is returned to the proxy device.
  • the receiving module is specifically configured to: receive a session parameter sent by the proxy device, where the session parameter is the proxy device The received paging message sent by the CS core network element is carried;
  • the processing module is specifically configured to: page to the UE according to the session parameter;
  • the sending module is specifically configured to: return a paging response to the proxy device;
  • the receiving module is specifically configured to: receive a bearer setup request sent by the proxy device;
  • the processing module is specifically configured to: establish a VoLTE bearer between the UE and the proxy device according to the bearer setup request;
  • the sending module is specifically configured to: return a bearer setup response to the proxy device.
  • a base station eNB including:
  • a receiving module configured to receive a long-term evolution LTE-based voice VoLTE bearer-related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer related signaling of the proxy device to the circuit switched domain CS core network network element Conversion obtained;
  • a sending module configured to send, to the proxy device, the VoLTE bearer related signaling of the user equipment UE.
  • the fourth aspect provides a VoLTE service implementation system, including the base station eNB according to the third aspect, the mobility management entity MME according to any one of the foregoing aspects, and the proxy device according to any one of the foregoing aspects. And a circuit switched domain CS core network element;
  • the proxy device is respectively connected to the eNB, the MME, and the CS core network element;
  • the proxy device is configured to convert the LTE-based voice VoLTE bearer related signaling of the eNB or the MME into CS voice bearer related signaling that can be processed by the CS core network NE, and Transmitting the CS voice bearer related signaling to the CS core network element; and converting the CS voice bearer related signaling of the CS core network element into VoLTE bearer related signaling, and sending the eNB or the MME.
  • a fifth aspect provides a method for implementing a VoLTE service, including:
  • the proxy device obtains the long-term evolution LTE-based voice VoLTE bearer-related signaling of the base station eNB or the mobility management entity MME, and converts the obtained VoLTE bearer-related signaling into a CS voice bearer related information that can be processed by the CS core network element of the circuit-switched domain. And transmitting, to the CS core network element, the converted CS voice bearer related signaling;
  • the proxy device acquires the CS voice bearer related signaling of the CS core network element, and converts the obtained CS voice bearer related signaling into a VoLTE bearer related signaling, and sends the converted VoLTE bearer related signaling.
  • the proxy device acquires the CS voice bearer related signaling of the CS core network element, and converts the obtained CS voice bearer related signaling into a VoLTE bearer related signaling, and sends the converted VoLTE bearer related signaling.
  • the eNB or the MME To the eNB or the MME.
  • the method further includes:
  • the proxy device receives an authentication request of the CS core network element, and the authentication request carries at least an authentication parameter, and sends an authentication parameter in the authentication request to the MME;
  • the proxy device receives an authentication response sent by the user equipment UE according to the authentication parameter, and converts the authentication response into an authentication response that can be processed by the CS core network element.
  • the CS core network element sends an authentication response that can be processed by the CS core network element.
  • the method further includes:
  • the proxy device receives the session initiation protocol SIP registration request signaling of the user equipment UE that is forwarded by the eNB, where the SIP registration request signaling carries the identifier information of the UE, and is carried according to the SIP registration request signaling.
  • the identifier information of the UE generates a location update request, and sends the location update request to the CS core network element;
  • the proxy device receives a location update accept message returned by the CS core network element according to the location update request, where the location update accept message is used to indicate that the SIP registration request of the UE is accepted, and is accepted according to the location update.
  • the message obtains SIP registration completion signaling, and sends the SIP registration completion signaling to the eNB.
  • the method specifically includes:
  • the proxy device receives a SIP request message for creating a session of the user equipment UE, and the SIP request message of the creation session carries a session parameter, and converts the SIP request message of the creation session into a CS core network element capable of processing
  • the connection management request related signaling is sent to the CS core network element by the connection management request related signaling;
  • the proxy device receives a radio access bearer RAB allocation request message returned by the CS core network element according to the connection management request related signaling, establishes a voice bearer according to the RAB allocation request message, and allocates a request according to the RAB. Generating a bearer setup request, and sending the bearer setup request to the MME;
  • the proxy device receives a bearer setup response returned by the MME after establishing a VoLTE bearer with the UE according to the bearer setup request, and obtains the CS core network according to the bearer setup response.
  • the RAB allocation response message corresponding to the RAB allocation request message that can be processed by the network element, and the RAB allocation response message corresponding to the RAB allocation request message is sent to the CS core network network element;
  • the proxy device receives the connection message returned by the CS core network element, and obtains SIP signaling indicating that the session connection is established according to the connection message, and sends the indication that the session connection is established to the UE by the eNB.
  • a response message of the connection message that can be processed by the CS core network element, and a response message of the connection message is returned to the CS core network element.
  • the proxy device After the proxy device sends the RAB allocation response message corresponding to the RAB allocation request message to the CS core network element, receiving a ringing message sent by the CS core network element, and converting the ringing message into an indication
  • the called SIP message that plays the ringback tone to the calling party, and sends the SIP signaling indicating that the called party plays the ring back tone to the calling party, and sends the SIP signaling to the UE through the eNB.
  • the proxy device Transmitting, by the proxy device, the connection management request related signaling to the CS core network element
  • the message that the current call is being processed is converted into a SIP message indicating the progress of the session, and the SIP message indicating the progress of the session is passed through the eNB. Sent to the UE.
  • the method specifically includes:
  • the proxy device receives a paging message sent by the network element of the CS core network, where the paging message carries a session parameter, acquires the session parameter carried in the paging message, and sends the session parameter to the
  • the MME receives the paging response returned by the MME after paging to the UE according to the session parameter, and converts the paging response returned by the MME into a paging response that can be processed by the CS core network element.
  • the voice call confirmation message that can be processed by the element, and the voice call confirmation message is sent to the CS core network element;
  • a radio access bearer RAB allocation request sent by the CS core network element establishing a voice bearer according to the RAB allocation request, obtaining a bearer setup request, and sending the bearer setup request to the MME
  • the RAB allocates the requested RAB allocation response, and sends an RAB allocation response corresponding to the RAB allocation request to the CS core network element;
  • the proxy device After receiving the connection confirmation message of the UE forwarded by the eNB, the proxy device converts the connection confirmation message into a connection message that can be processed by the CS core network element, and sends the connection message to the CS core network element.
  • the connection message is received, and the corresponding connection sent by the network element of the CS core network is received.
  • the response message of the message After the response message of the message, the response message of the connection message is converted into SIP signaling indicating the connection confirmation, and the SIP signaling indicating the connection confirmation is sent to the UE by using the eNB.
  • the proxy device After the proxy device sends the RAB allocation response corresponding to the RAB allocation request to the CS core network element, receiving the SIP signaling that the UE forwards by the eNB to indicate that the called party plays the ringback tone to the calling party, The SIP signaling indicating that the called party plays the ringback tone is converted into a ringing message that can be processed by the CS core network element, and the ringing message is sent to the CS core network element.
  • a method for implementing a VoLTE service including:
  • the mobility management entity MME receives the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling sent by the proxy device, where the VoLTE bearer related signaling is the CS voice bearer related signaling of the proxy device to the circuit switched domain CS core network network element. Conversion obtained;
  • LTE Long Term Evolution
  • the MME sends the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • the method further includes:
  • the MME generates a non-access stratum NAS message carrying the authentication parameter
  • the MME sends a NAS message carrying the authentication parameter to the UE.
  • the method further includes:
  • the MME returns a bearer setup response to the proxy device.
  • the method in the called process specifically includes:
  • the MME After paging, the MME, after paging to the UE according to the session parameter, returns a search to the proxy device. Responding to receive a bearer setup request sent by the proxy device;
  • the MME establishes a VoLTE bearer between the UE and the proxy device according to the bearer setup request, and returns a bearer setup response to the proxy device.
  • the seventh aspect provides a method for implementing a VoLTE service, including:
  • the base station eNB receives the long-term evolution LTE-based voice VoLTE bearer-related signaling sent by the proxy device, where the VoLTE bearer-related signaling is obtained by the proxy device to convert the CS voice bearer related signaling of the circuit switched domain CS core network network element;
  • the eNB sends the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • the proxy device can implement the conversion between the VoLTE bearer related signaling and the CS voice bearer related signaling that can be processed by the CS core network NE.
  • the VoLTE call accesses the CS domain of the traditional core network (2G or 3G), and completes the voice call through the CS domain of the traditional core network.
  • the VoLTE service is completed by using the traditional core network.
  • Figure 1 is a schematic diagram of a 2G/3G network structure
  • FIG. 2 is a schematic diagram of a 4G network structure
  • FIG. 3 is a schematic structural diagram of an LTE system according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of another LTE system according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an authentication and encryption process according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a process of attaching a UE to an LTE network according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a SIP registration process performed by a UE according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a calling process according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a called party according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a proxy device according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of another proxy device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an MME according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another MME according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of an eNB according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of another eNB according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic flowchart of a method for implementing a VoLTE service by using a proxy device according to an embodiment of the present invention
  • FIG. 17 is a schematic flowchart of a method for an MME to implement a VoLTE service according to an embodiment of the present disclosure
  • FIG. 18 is a schematic flowchart of a method for an eNB to implement a VoLTE service according to an embodiment of the present invention.
  • a proxy device is set on the network side of the LTE network, and the transition between the Session Initiation Protocol (SIP) signaling of the VoLTE and the CS signaling that can be processed by the network element of the CS core network is implemented by the proxy device.
  • the CS signaling refers to the voice signaling in the traditional CS domain.
  • the VoLTE call is connected to the CS domain of the traditional core network (2G or 3G), and the voice call is completed through the CS domain of the traditional core network, and the voice call is implemented.
  • the VoLTE service is completed using the traditional core network.
  • the voice signaling in the CS domain is voice signaling based on the IuCS interface
  • the voice signaling in the CS domain in the 2G network is voice signaling based on the A interface.
  • the LTE system architecture provided by the present invention includes at least an eNB, an MME, a proxy device, and a CS core network element; the proxy device is respectively connected to the MME, the eNB, and the CS core network element.
  • the CS core network element includes a Mobile Switching Center (MSC) and a Media Gateway (MGW), wherein the MSC is used to control the CS service. Face processing, MGW is used for user plane processing of CS services.
  • MSC Mobile Switching Center
  • MGW Media Gateway
  • the MME and the proxy device are connected through a private interface.
  • the system architecture further includes an SGW and a PGW, and the eNB, the MME, the SGW, and the PGW are connected according to a connection relationship defined by the LTE protocol.
  • the eNB is connected to the MME and the SGW
  • the SGW is connected to the PGW
  • the PGW is connected to the core network
  • the MME is connected to the SGW.
  • the eNB is connected to the MME through an S1-MME interface
  • the eNB is connected to the SGW through an S1-U interface.
  • the eNB, the SGW, the PGW, and the Internet constitute a transmission path of the PS domain user plane data stream.
  • the MME, eNB, SGW, and proxy device form a transmission path for the control plane data stream.
  • the MME, the eNB, the proxy device, and the CS core network element form a transmission path for the voice data stream.
  • the MME is responsible for allocating the PS domain service to the SGW and the VoLTE service to the proxy device.
  • the MME establishes a VoLTE bearer between the eNB and the proxy device, and the VoLTE bearer includes at least one of the following: a VoLTE signaling bearer and a VoLTE voice bearer.
  • the MME is also used to complete the authentication process for the MSC and complete the paging process for the MSC.
  • the proxy device converts the VoLTE bearer into a voice bearer of the CS domain that can be processed by the CS core network element.
  • the voice bearer of the CS domain includes a control plane bearer and a user plane bearer, and the proxy device sends the data related to the user plane bearer to the MGW.
  • the control plane bearer related signaling is sent to the MSC.
  • the proxy device may be a Radio Network Controller (RNC) or a Base Station Controller (BSC).
  • RNC Radio Network Controller
  • BSC Base Station Controller
  • the proxy device is responsible for completing the conversion between SIP signaling and CS signaling.
  • the UE attaches and initiates the PS service in the EPC according to the procedures specified in the existing protocol.
  • the SGW and the PGW do not need to establish a VoLTE bearer.
  • the proxy device may be implemented on an entity that integrates SGW functions, and is responsible for conversion between SIP signaling and CS signaling.
  • the proxy device is also responsible for VoLTE bearer processing and mobility processing, and is responsible for processing data transmitted by the IuCS interface or the A interface, and an IuR interface between the proxy device and a network entity integrating the functions of the proxy device.
  • the transmitted data is processed, the IuR interface
  • the proxy device is mainly used to convert the LTE-based voice VoLTE bearer related signaling of the eNB or the MME into the CS voice bearer related signaling that can be processed by the CS core network NE, and send the signaling to the CS voice bearer related signaling.
  • the CS core network element is configured to convert the CS voice bearer related signaling of the CS core network element into VoLTE bearer related signaling, and send the signal to the eNB or the MME.
  • the CS voice bearer related signaling refers to voice signaling that can be processed by the CS core network element.
  • VoLTE based on the above system architecture is described below through a plurality of different processing procedures.
  • the proxy device receives an authentication request (authentication request) of the CS core network element, and the authentication request carries at least an authentication parameter, and the authentication request is used in the authentication request.
  • the MME receives the authentication parameter sent by the proxy device, generates a non-access stratum NAS message carrying the authentication parameter, and sends a NAS message carrying the authentication parameter to the UE.
  • the UE corresponding to the authentication request can be determined by using the underlying signaling link number. This is not the content of the present invention. For details, refer to the provisions in the existing protocol, and the description is not described in detail herein.
  • the authentication parameters include but are not limited to RAND and AUTN.
  • the RES is included in the authentication response.
  • Step 501 Receive an authentication request sent by the MME when the UE initially attaches to the MME.
  • Step 502 The UE returns an authentication response to the MME.
  • Step 501 to step 502 are the first authentication of the UE under LTE, and the proxy device does not participate in the authentication process.
  • Step 503 The MSC in the CS core network element sends an authentication request of the UE to the proxy device.
  • Step 504 The MME sends an authentication request of the UE to the UE.
  • Step 506 The UE returns an authentication response to the authentication request to the MME.
  • Step 507 The MME returns an authentication response of the UE to the proxy device.
  • Step 508 The proxy device converts the authentication response of the UE into an authentication response that can be processed by the network element of the CS core network, and returns an authentication response that can be processed by the network element of the CS core network to the MSC.
  • Step 509 The MSC sends a security mode command (Security Mode Commands) to the proxy device.
  • a security mode command Security Mode Commands
  • Step 510 The RNC parses the password pair (CK, IK) carried in the security mode command, and sends the password pair to the MME.
  • the MME calculates the root key (Kasme) according to the password pair, and obtains the key.
  • the UE is attached to the LTE network.
  • the MME receives the attach request of the user equipment UE sent by the eNB, and returns a request for activating the VoLTE bearer to the eNB after accepting the attach request of the UE.
  • the request for activating the VoLTE bearer carries the VoLTE bearer parameter;
  • the eNB notifies the UE of the VoLTE bearer parameter carried in the request for activating the VoLTE bearer.
  • the VoLTE bearer parameter includes, but is not limited to, a service level parameter (QCI), an access point name (APN), and a destination address of the VoLTE bearer, where the destination address of the VoLTE bearer is an address of the proxy device. .
  • QCI service level parameter
  • API access point name
  • destination address of the VoLTE bearer is an address of the proxy device.
  • the specific process of the UE attaching to the LTE network is as follows:
  • Step 601 The UE sends an attach request (Attach Request) to the eNB;
  • Step 602 The eNB sends an attach request of the UE to the MME.
  • Step 603 After receiving the attach request of the UE, the MME returns a request for activating the VoLTE bearer to the eNB, where the request for the activated VoLTE bearer carries the VoLTE bearer parameter.
  • Step 604 The eNB sends a UE Capability Enquiry message to the UE, where the UE capability query message carries a VoLTE bearer parameter.
  • Step 605 The UE returns UE Capability Information to the eNB.
  • Step 606 The eNB performs RRC connection reconfiguration (RRC Connection Reconfiguration (RRC), radio resource control): after accepting the attach request of the UE, sending an Attach Accept message to the UE, and initiating activation of the default to the UE. a request carried by the EPS, and sending a context request to the UE to notify the UE of the information carried by the VoLTE;
  • RRC Radio Resource Control
  • Step 607 The UE sends an RRC Connection Reconfiguration Complete message to the eNB.
  • Step 608 The eNB sends an Initial Context Setup Response to the MME.
  • Step 609 The UE sends an Attach Complete message to the eNB.
  • Step 610 The eNB sends an attach complete message to the MME.
  • the proxy device receives the session initiation protocol SIP registration request signaling of the user equipment UE forwarded by the eNB, and the SIP registration request signaling carries the identifier information of the UE. And generating a location update request that can be processed by the CS core network element according to the identifier information of the UE that is carried in the SIP registration request signaling, and sending the location update request to the CS core network element; and receiving the location Determining, by the CS core network element, a location update accept message returned according to the location update request, the location update accept message is used to indicate that the SIP registration request of the UE is accepted, and sending the message to the eNB according to the location update accept message.
  • SIP registration completion signaling ;
  • the eNB forwards the SIP registration completion signaling to the UE.
  • Step 701 The eNB sends a SIP registration request of the UE to the proxy device.
  • Step 702 The proxy device converts the SIP registration request into a location update request that can be processed by the CS core network element, and sends the location update request to the CS core network element MSC.
  • Step 703 The MSC sends a location update accept message to the proxy device.
  • Step 704 The proxy device sends a 200 ok SIP message to the UE through the eNB.
  • the proxy device receives a SIP request message for creating a session of the user equipment UE, and the SIP request message of the created session carries a session parameter, and converts the SIP request message of the created session into a CS.
  • a connection management request related signaling that can be processed by the core network element, and sending the connection management request related signaling to the CS core network element;
  • connection message returned by the CS core network element obtaining, according to the connection message, SIP signaling indicating that the session connection is established, and sending, by the eNB, the SIP signaling indicating that the session connection is established, and Receiving the response signaling returned by the UE that is forwarded by the eNB to the SIP signaling indicating that the session connection is established, and obtaining the CS core network according to the received response signaling corresponding to the SIP signaling indicating that the session connection is established.
  • the response message of the connection message that can be processed by the network element returns a response message of the connection message to the CS core network element.
  • the proxy device further sends a ringing message sent by the network element of the CS core network after the RAB allocation response message corresponding to the RAB allocation request message is sent to the CS core network element according to the bearer setup response. Transmitting the ringing message into SIP signaling indicating that the called party plays the ring back tone to the calling party, and sending the SIP signaling indicating that the called party plays the ring back tone to the calling party, and sending the SIP signaling to the UE through the eNB .
  • the proxy device sends the connection management request related signaling to the CS core network element, receiving a message that the CS core network element returns the current call being processed, and the current call is being processed.
  • the processed message is converted into a SIP message indicating the progress of the session, the indication session is The progressed SIP message is sent to the UE through the eNB.
  • the session parameter includes at least a calling identifier and a called identifier.
  • Step 801 The eNB sends an SIP request message for creating a session of the UE to the proxy device, that is, an Invite message, where the Invite message carries the session parameter.
  • Step 802 The proxy device converts the Invite message into a connection management request related signaling that can be processed by the CS core network element, where the connection management request related signaling includes a connection management service request (CM Service Request) and a setup request (Setup).
  • CM Service Request connection management service request
  • Setup setup request
  • Step 803 The MSC sends a message to the proxy device that the current call is being processed (Call Proceeding);
  • Step 804 The proxy device converts the message that the current call is being processed into a SIP message indicating the progress of the session, that is, SIP signaling: 183Session Progress, and sends 183Session Progress to the UE through the eNB to notify the UE that the current call is being processed;
  • Step 805 The eNB sends the Prack signaling of the UE to the proxy device.
  • Step 806 The proxy device sends an acknowledgment signaling to the UE through the eNB, that is, SIP signaling: 200 OK;
  • Step 807 The MSC sends an RAB Assignment Request message (RAB Assignment Request) to the proxy device.
  • RAB Assignment Request RAB Assignment Request
  • Step 808 The proxy device establishes a voice bearer according to the RAB allocation request message, and generates a bearer setup request according to the RAB allocation request message, and sends the bearer to the MME.
  • Step 809 The MME initiates a process of establishing a VoLTE bearer to the UE, that is, activating a destination EPS bearer according to the bearer setup request, and sending a context request to the UE.
  • Step 810 The UE returns a context accept message (Context Accept) to the MME.
  • Step 811 The MME sends a bearer setup response to the proxy device.
  • Step 812 The proxy device obtains a RAB Assignment Response (RAB Assignment Response) of the RAB allocation request message that can be processed by the CS core network element according to the bearer setup response, to the MSC. Return the RAB allocation response;
  • RAB Assignment Response RAB Assignment Response
  • Step 813 The MSC sends a ringing message (Alerting) to the proxy device.
  • Step 814 The proxy device converts the ringing message into SIP signaling indicating that the called party plays a ringback tone to the calling party, that is, SIP signaling: 180Ring, and sends 180Ring to the UE through the eNB;
  • Step 815 The proxy device receives a connection message (Connect) sent by the MSC.
  • Step 816 The proxy device converts the connection message into acknowledgment signaling, that is, SIP signaling: 200 OK, and sends the 200 OK to the UE through the eNB;
  • Step 817 The proxy device receives the SIP response signaling (ACK) sent by the UE.
  • ACK SIP response signaling
  • Step 818 The proxy device converts the SIP response signaling into a connection response message (Connect ACK) that can be processed by the CS core network element, and sends a connection response message to the MSC, and the voice connection is successfully established.
  • Connect ACK connection response message
  • the proxy device receives a paging message sent by the network element of the CS core network, where the paging message carries a session parameter, and the method is carried in the paging message.
  • a session parameter the session parameter is sent to the MME, and the paging response returned by the MME after paging to the UE according to the session parameter is received, and the paging response returned by the UE is converted into a CS core network element.
  • a paging response that can be processed, and sending a paging response that the CS core network element can process to the CS core network element;
  • the voice call confirmation message that can be processed by the CS core network element is obtained according to the acknowledgment message of the SIP request message for the created session, to the CS core network.
  • the network element sends the voice call confirmation message;
  • connection confirmation message of the UE sent by the eNB After receiving the connection confirmation message of the UE sent by the eNB, converting the connection confirmation message into a connection message that can be processed by the CS core network element, sending the connection message to the CS core network element, and receiving After the response message of the connection message is sent by the CS core network element, the response message of the connection message is converted into the SIP signaling indicating the connection confirmation, and the SIP signaling indicating the connection confirmation is passed.
  • the eNB sends to the UE.
  • the eNB receives an indication from the eNB that the called party plays a ringback tone to the calling party.
  • SIP signaling converting the SIP signaling indicating that the called party plays the ringback tone to the ringing message that the CS core network element can process, and sending the ringing message to the CS core network Network element.
  • the session parameter includes at least a calling identifier and a called identifier.
  • Step 901 The CS core network element MSC sends a paging message (Paging) to the proxy device, where the paging message carries the session parameter.
  • Paging paging message
  • Step 902 The proxy device sends the session parameter carried in the paging message to the MME, and the MME sends the paging. Specifically, the proxy device carries the session parameter by using a message agreed with the MME.
  • Step 903 The MME pages the called UE according to the session parameter.
  • Step 904 The UE initiates a process of establishing a VoLTE bearer in response to the paging of the MME, and sends a PDN Connectivity Request (PDN, Packet Data Network, Packet Data Network) to the MME.
  • PDN Connectivity Request Packet Data Network, Packet Data Network
  • Step 905 The MME activates a default EPS bearer of the UE, and sends a context request (Context Request) to the UE.
  • Context Request a context request
  • Step 906 The UE returns a Context Accept message to the MME.
  • Step 907 The MME returns a paging response to the proxy device, where the paging response is carried by the message agreed between the MME and the proxy device.
  • Step 908 The proxy device converts the paging response of the MME into a paging response (Paging Response) that can be processed by the CS core network element, and returns a paging response that can be processed by the CS core network element to the MSC.
  • Paging Response a paging response
  • Step 909 The MSC sends a voice call setup request (Setup) to the proxy device.
  • Step 910 The proxy device converts the Setup into a SIP request message for creating a session, that is, an Invite message, and sends the Invite message to the UE through the eNB.
  • Step 911 The eNB sends a SIP message indicating the progress of the session of the UE to the proxy device, that is, SIP signaling: 183 Session Progress;
  • Step 912 The proxy device returns Prack signaling to the UE by using the eNB.
  • Step 913 The eNB returns the acknowledgment signaling of the UE to the proxy device, that is, SIP signaling: 200 OK;
  • Step 914 The proxy device converts the 200 OK into a call confirmation message (Call Confirmed) that can be processed by the CS core network element, and sends a Call Confirmed to the MSC.
  • Call Confirmed a call confirmation message
  • Step 915 The MSC sends an RAB Assignment Request (RAB Assignment Request) to the proxy device.
  • RAB Assignment Request RAB Assignment Request
  • Step 916 The proxy device sends a bearer setup request to the MME.
  • the bearer setup request is a message agreed between the proxy device and the MME.
  • Step 917 The MME activates a Dedicated EPS Brearer of the UE, and sends a context request (Context Request) to the UE.
  • Step 918 The UE sends a context accept message (Context Accept) to the MME.
  • Step 919 The MME returns a bearer setup response to the proxy device.
  • Step 920 The proxy device obtains a RAB Assignment Response that can be processed by the CS core network element according to the bearer setup response of the MME, and sends the RAB assignment response to the MSC.
  • Step 921 The eNB sends, to the proxy device, the SIP signaling indicating that the called party plays the ringback tone to the calling party, that is, SIP signaling: 180Ring;
  • Step 922 The proxy device converts the 180Ring into a ringing message (Alerting) that can be processed by the CS core network element, and sends the Alerting to the MSC.
  • Step 923 The eNB returns a connection confirmation message of the UE to the proxy device, that is, SIP signaling: 200 OK;
  • Step 924 The proxy device converts the 200 OK into a connection message (Connect) that the CS core network element can process, and sends the Connect to the MSC.
  • Step 925 The MSC sends a connection response message (Connect ACK) to the proxy device.
  • Step 926 The proxy device converts the Connect ACK into a SIP response (ACK) message, and sends a SIP response message to the UE, and the voice connection of the called UE is successfully established.
  • ACK SIP response
  • the structure of the proxy device provided in the embodiment of the present invention is as shown in FIG. 10, and mainly includes a communication module 1001 and a processing module 1002:
  • the communication module 1001 is configured to acquire, according to the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling of the base station eNB or the mobility management entity MME;
  • LTE Long Term Evolution
  • the processing module 1002 is configured to convert the VoLTE bearer related signaling obtained by the communication module 1001 into CS voice bearer related signaling that can be processed by the CS core network element of the circuit switched domain;
  • the communication module 1001 is configured to send the CS voice bearer related signaling that is converted by the processing module 1002 to the CS core network element; or
  • the communication module 1001 is configured to acquire CS voice bearer related signaling of the CS core network element
  • the processing module 1002 is configured to convert the CS voice bearer related signaling acquired by the communications module 1001 into VoLTE bearer related signaling.
  • the communication module 1001 is configured to send the VoLTE bearer related signaling converted by the processing module 1002 to the eNB or the MME.
  • the communication module 1001 is further configured to: receive an authentication request of the CS core network element, where the authentication request carries at least an authentication parameter;
  • the processing module 1002 is further configured to: obtain an authentication parameter in the authentication request received by the communication module;
  • the communication module 1001 is further configured to send the authentication parameter acquired by the processing module to the Receiving, by the MME, an authentication response sent by the user equipment UE according to the authentication parameter;
  • the processing module 1002 is further configured to: convert the authentication response received by the communication module into an authentication response that can be processed by the CS core network element;
  • the communication module 1001 is further configured to: send an authentication response that can be processed by the CS core network element obtained by the processing module to the CS core network element.
  • the communication module 1001 is further configured to: receive a session initiation protocol SIP registration request signaling of the user equipment UE that is forwarded by the eNB, where the SIP registration request signaling carries the Identification information of the UE;
  • the processing module 1002 is further configured to: generate a location update request according to the identifier information of the UE that is carried in the SIP registration request signaling received by the communication module;
  • the communication module 1001 is further configured to: send the location update request generated by the processing module to the CS core network element, and receive a location update that is returned by the CS core network element according to the location update request. Accepting a message, the location update accept message is used to indicate accepting a SIP registration request of the UE;
  • the processing module 1002 is further configured to: obtain SIP registration completion signaling according to the location update accept message received by the communication module;
  • the communication module 1001 is further configured to: send, to the eNB, the SIP registration completion signaling obtained by the processing module.
  • the communication module 1001 is specifically configured to: receive a SIP request message for creating a session of the UE that is forwarded by the eNB, where the SIP request message of the created session carries a session parameter;
  • the processing module 1002 is specifically configured to: convert the SIP request message of the session created by the communication module into a connection management request related signaling that can be processed by the CS core network element;
  • the communication module 1001 is specifically configured to: send the connection management request related signaling that is converted by the processing module to the CS core network element, and receive the CS core network element according to the connection management request.
  • the processing module 1002 is specifically configured to: according to the RAB allocation request received by the communication module Generating a voice bearer, and generating a bearer setup request according to the RAB allocation request message;
  • the communication module 1001 is specifically configured to: send the bearer setup request generated by the processing module to the MME, and receive the MME to establish, with the UE, the proxy device according to the bearer setup request.
  • the processing module 1002 is specifically configured to: obtain, according to the bearer setup response, an RAB allocation response message that can be processed by the CS core network element corresponding to the RAB allocation request message;
  • the communication module 1001 is specifically configured to: send, to the CS core network element, an RAB allocation response message corresponding to the RAB allocation request message obtained by the processing module, and receive a connection message returned by the CS core network element ;
  • the processing module is specifically configured to: obtain SIP registration completion signaling according to the connection message received by the communication module 1001;
  • the communication module 1001 is specifically configured to: send, by using the eNB, the SIP signaling that is completed by the processing module to indicate that the session connection is established, and receive the indication that the UE that is forwarded by the eNB corresponds to the indication The response signaling returned by the SIP signaling completed by the session connection establishment;
  • the processing module is specifically configured to: obtain, according to the response signaling of the SIP signaling that is received by the communication module, the SIP message, which is configured by the CS core network, to obtain a response message of the connection message that can be processed by the CS core network element;
  • the communication module 1001 is specifically configured to: return, to the CS core network element, a response message of the connection message obtained by the processing module.
  • the communication module 1001 is further configured to: after sending the RAB allocation response message corresponding to the RAB allocation request message to the CS core network element, receive the ringing sent by the CS core network element Message
  • the processing module 1002 is further configured to: convert the ringing message received by the communication module into SIP signaling that indicates that the called party plays a ringback tone to the calling party;
  • the communication module 1001 is further configured to: send, by the eNB, the SIP signaling that is obtained by converting the processing module to the caller to play a ringback tone to the UE.
  • the communication module 1001 is further configured to: associate the connection management request with a letter After the network element is sent to the CS core network, the message that the current call returned by the CS core network element is being processed is received;
  • the processing module is further configured to: convert, by the communication module, a message that the current call is being processed into a SIP message indicating a progress of the session;
  • the communication module 1001 is further configured to: send the SIP message indicating the progress of the session obtained by the processing module to the UE by using the eNB.
  • the communication module 1001 is specifically configured to: receive a paging message sent by the network element of the CS core network, where the paging message carries a session parameter;
  • the processing module 1002 is specifically configured to: acquire the session parameter carried in the paging message received by the communication module;
  • the communication module 1001 is specifically configured to: send the session parameter obtained by the processing module to the MME, and receive a paging response returned by the MME after paging to the UE according to the session parameter;
  • the processing module 1002 is specifically configured to: convert a paging response returned by the MME received by the communication module into a paging response that can be processed by the network element of the CS core network;
  • the communication module 1001 is specifically configured to: send a paging response that can be processed by the CS core network element obtained by the processing module to the CS core network element, and receive the network element sent by the CS core network element.
  • Voice call setup request ;
  • the processing module 1002 is specifically configured to: obtain an SIP request message for creating a session according to the voice call setup request received by the communication module;
  • the communication module 1001 is specifically configured to: send, by using the eNB, the SIP request message of the created session obtained by the processing module to the UE, and receive, by the eNB, the returned UE that is returned by the UE for the created session.
  • the processing module is specifically configured to: convert an acknowledgement message of the SIP request message for the session created by the communication module into a voice call confirmation message that can be processed by the CS core network element;
  • the communication module 1001 is specifically configured to: send the processing module to the CS core network element Transmitting the obtained voice call confirmation message, and receiving a radio access bearer RAB allocation request sent by the CS core network element;
  • the processing module 1002 is specifically configured to: establish a voice bearer to obtain a bearer setup request according to the RAB allocation request received by the communications module;
  • the communication module 1001 is specifically configured to: send, to the MME, the bearer setup request obtained by the processing module, and receive, by the MME, between the UE and the proxy device according to the bearer setup request.
  • the bearer setup response returned after the VoLTE bearer;
  • the processing module is specifically configured to: obtain, according to the bearer setup response received by the communications module, an RAB allocation response that can be processed by the CS core network element corresponding to the RAB allocation request;
  • the communication module 1001 is specifically configured to: send, to the CS core network element, an RAB allocation response that is obtained by the processing module and that is corresponding to the RAB allocation request, and receive a connection confirmation message of the UE that is forwarded by the eNB;
  • the processing module is specifically configured to: convert the connection confirmation message received by the communication module into a connection message that can be processed by the CS core network element;
  • the communication module 1001 is specifically configured to: send, to the CS core network element, the connection message obtained by the processing module, and receive a response message sent by the CS core network element corresponding to the connection message;
  • the processing module is specifically configured to: convert a response message of the connection message received by the communication module into a SIP signaling indicating a connection confirmation;
  • the communication module 1001 is specifically configured to: send the SIP signaling indicating the connection confirmation obtained by the processing module to the UE by using the eNB.
  • the communication module 1001 is further configured to: after sending the RAB allocation response corresponding to the RAB allocation request to the CS core network element, receive the indication of the UE forwarded by the eNB The SIP signal that the calling party plays the ring back tone;
  • the processing module 1002 is further configured to: convert, by the communication module, the SIP signaling indicating that the called party plays the ringback tone to the calling party, to a ringing message that can be processed by the CS core network element;
  • the communication module 1001 is further configured to: send the ringing message obtained by the processing module conversion to the CS core network element.
  • the embodiment of the present invention further provides another proxy device.
  • the proxy device mainly includes processing.
  • the processor 1101 acquires the VoLTE bearer-related signaling of the eNB or the MME through the communication interface 1102, and converts the obtained VoLTE bearer-related signaling into CS voice bearer related signaling that can be processed by the CS core network element, and uses the communication interface 1102 to Transmitting the CS voice bearer related signaling to the CS core network element; and acquiring the CS voice bearer related signaling of the CS core network element by using the communication interface 1102, and acquiring the CS voice bearer
  • the related signaling is converted into the VoLTE bearer related signaling, and the converted VoLTE bearer related signaling is sent to the eNB or the MME through the communication interface 1102.
  • the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, a discrete hardware component, and may implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • FIG. 12 which mainly includes a receiving module 1201 and a sending module 1202, specifically:
  • the receiving module 1201 is configured to receive, according to the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer of the proxy device to the circuit switched domain CS core network network element Related signaling conversion is obtained;
  • LTE Long Term Evolution
  • the sending module 1202 is configured to send the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • the processing module 1203 is further included;
  • the receiving module is specifically configured to: receive the authentication parameter sent by the proxy device;
  • the processing module is specifically configured to: generate a non-access stratum NAS message that carries the authentication parameter;
  • the sending module is specifically configured to: send a NAS message that carries the authentication parameter to the UE.
  • the receiving module is specifically configured to: receive an attach request of the user equipment UE sent by the eNB;
  • the sending module is specifically configured to: after receiving the attach request of the UE, return a request for activating a VoLTE bearer to the eNB, where the request for activating the VoLTE bearer carries a VoLTE bearer parameter.
  • the VoLTE bearer parameter includes a service level parameter QCI, an APN, and a destination address of the VoLTE bearer, and the destination address of the VoLTE bearer is an address of the proxy device.
  • the receiving module is specifically configured to: receive a bearer setup request sent by the proxy device;
  • the processing module is specifically configured to: establish, by the proxy device, a VoLTE bearer between the UE and the UE according to the bearer setup request;
  • the sending module is specifically configured to: return a bearer setup response to the proxy device.
  • the receiving module is specifically configured to: receive a session parameter sent by the proxy device, where the session parameter is carried in a paging message sent by the network element of the CS core network received by the proxy device;
  • the processing module is specifically configured to: page to the UE according to the session parameter;
  • the sending module is specifically configured to: return a paging response to the proxy device;
  • the receiving module is specifically configured to: receive a bearer setup request sent by the proxy device;
  • the processing module is specifically configured to: establish a VoLTE bearer between the UE and the proxy device according to the bearer setup request;
  • the sending module is specifically configured to: return a bearer setup response to the proxy device.
  • the embodiment of the present invention further provides another MME.
  • the MME mainly includes a processor 1301 and Communication interface 1302, processor 1301 through communication interface 1302 Receiving the VoLTE bearer related signaling sent by the proxy device, where the VoLTE bearer related signaling is obtained by the proxy device to convert the CS voice bearer related signaling of the CS core network element of the circuit switched domain; and to the proxy device by using the communication interface 1302 Transmitting the VoLTE bearer related signaling of the user equipment UE.
  • the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, a discrete hardware component, and may implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the structure of the eNB provided by the embodiment of the present invention is as shown in FIG. 14 , and mainly includes a receiving module 1401 and a sending module 1402, specifically:
  • the receiving module 1401 is configured to receive, according to the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer of the proxy device to the circuit switched domain CS core network network element Related signaling conversion is obtained;
  • LTE Long Term Evolution
  • the sending module 1402 is configured to send the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • the eNB in this embodiment refers to the description of the eNB in each communication process, and the repeated description is not repeated.
  • the eNB mainly includes a processor 1501. And the transceiver 1502, the processor 1501 receives the VoLTE bearer related signaling sent by the proxy device by using the transceiver 1502, where the VoLTE bearer related signaling is obtained by the proxy device to convert the CS voice bearer related signaling of the CS core network network element. Transmitting the VoLTE bearer related signaling of the UE to the proxy device through the transceiver 1502.
  • the processor can be a general purpose processor, a digital signal processor, an application specific integrated circuit,
  • the methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or executed by field programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the specific process of implementing the VoLTE service by using the proxy device is as follows:
  • Step 1601 The proxy device acquires the Long-Evolved LTE-based voice VoLTE bearer-related signaling of the base station eNB or the mobility management entity MME, and converts the obtained VoLTE bearer-related signaling into a CS voice that can be processed by the CS core network element of the circuit-switched domain. Carrying the relevant signaling, and transmitting the converted CS voice bearer related signaling to the CS core network element;
  • Step 1602 The proxy device acquires the CS voice bearer related signaling of the CS core network element, and converts the obtained CS voice bearer related signaling into a VoLTE bearer related signaling, and associates the converted VoLTE bearer. Signaling is sent to the eNB or the MME.
  • each communication process in the VoLTE service process by the proxy device can be referred to the related description of the above system part, and the repeated description is not repeated.
  • the proxy device receives an authentication request of the CS core network element, the authentication request carries at least an authentication parameter, and sends an authentication parameter in the authentication request to the MME;
  • the proxy device receives an authentication response sent by the user equipment UE according to the authentication parameter, and converts the authentication response into an authentication response that can be processed by the CS core network element.
  • the CS core network element sends an authentication response that can be processed by the CS core network element.
  • the proxy device receives the session initiation protocol SIP registration request signaling of the user equipment UE forwarded by the eNB, where the SIP registration request signaling carries the identifier information of the UE, and is registered according to the SIP.
  • the location information update request is generated by the identifier information of the UE that is carried in the request signaling, and the location update request is sent to the CS core network element.
  • the proxy device receives a SIP request message for creating a session of the user equipment UE, and the SIP request message of the created session carries a session parameter, and converts the SIP request message of the created session into the CS core.
  • the connection management request related signaling that can be processed by the network element, and the connection management request related signaling is sent to the CS core network element;
  • the proxy device receives a radio access bearer RAB allocation request message returned by the CS core network element according to the connection management request related signaling, establishes a voice bearer according to the RAB allocation request message, and allocates a request according to the RAB. Generating a bearer setup request, and sending the bearer setup request to the MME;
  • the proxy device receives a bearer setup response returned by the MME after establishing a VoLTE bearer with the UE according to the bearer setup request, and obtains the CS core network according to the bearer setup response.
  • the RAB allocation response message corresponding to the RAB allocation request message that can be processed by the network element, and the RAB allocation response message corresponding to the RAB allocation request message is sent to the CS core network network element;
  • the proxy device receives the connection message returned by the CS core network element, and obtains SIP signaling indicating that the session connection is established according to the connection message, and sends the indication that the session connection is established to the UE by the eNB.
  • a response message of the connection message that can be processed by the CS core network element, and a response message of the connection message is returned to the CS core network element.
  • the proxy device sends a ringing message sent by the network element of the CS core network to the CS core network element, after receiving the RAB allocation response message corresponding to the RAB allocation request message, and the ringing message is sent by the CS core network element.
  • the bell message is converted into SIP signaling indicating that the called party plays the ring back tone to the calling party, and the SIP signaling indicating that the called party plays the ring back tone to the calling party is sent to the UE through the eNB.
  • the proxy device sends the connection management request related signaling to the CS After receiving the core network element, the message that the current call is being processed by the CS core network element is received, and the message that the current call is processing is converted into a SIP message indicating the progress of the session, and the SIP message indicating the progress of the session is received. Transmitted to the UE by the eNB.
  • the proxy device receives a paging message sent by the network element of the CS core network, where the paging message carries a session parameter, and obtains the session parameter carried in the paging message, and the Transmitting the session parameter to the MME, and receiving a paging response returned by the MME after paging to the UE according to the session parameter, and converting the paging response returned by the MME to the CS core network element capable of processing a paging response, sending, to the CS core network element, a paging response that can be processed by the CS core network element;
  • the voice call confirmation message that can be processed by the element, and the voice call confirmation message is sent to the CS core network element;
  • a radio access bearer RAB allocation request sent by the CS core network element establishing a voice bearer according to the RAB allocation request, obtaining a bearer setup request, and sending the bearer setup request to the MME
  • the RAB allocates the requested RAB allocation response, and sends an RAB allocation response corresponding to the RAB allocation request to the CS core network element;
  • the proxy device After receiving the connection confirmation message of the UE forwarded by the eNB, the proxy device converts the connection confirmation message into a connection message that can be processed by the CS core network element, and sends the connection message to the CS core network element.
  • the connection message after receiving the response message corresponding to the connection message sent by the CS core network element, converting the response message of the connection message into SIP signaling indicating connection confirmation, and the SIP indicating the connection confirmation Signaling is sent to the UE by the eNB.
  • the UE receives an indication from the eNB that the called party plays a ringback tone to the calling party.
  • the SIP signaling, the SIP signaling indicating that the called party plays the ringback tone to the calling party is converted into a ringing message that can be processed by the CS core network element, and the ringing message is sent to the CS core. Network element.
  • the specific process of implementing the VoLTE service by using the MME is as follows:
  • Step 1701 The MME receives the Long Term Evolution (LTE)-based voice VoLTE bearer-related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer related signaling conversion of the proxy device to the circuit switched domain CS core network network element.
  • LTE Long Term Evolution
  • Step 1702 The MME sends the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • each communication process in the VoLTE service process by the MME can be referred to the related description in the system part above, and the repeated description is not repeated.
  • the specific process of implementing the VoLTE service by the eNB is as follows:
  • Step 1801 The eNB receives the Long Term Evolution (LTE)-based voice VoLTE bearer related signaling sent by the proxy device, where the VoLTE bearer related signaling is a CS voice bearer related signaling conversion of the proxy device to the circuit switched domain CS core network network element.
  • LTE Long Term Evolution
  • Step 1802 The eNB sends the VoLTE bearer related signaling of the user equipment UE to the proxy device.
  • each communication process in the VoLTE service process by the eNB can be referred to the related description in the system part above, and the repeated description is not repeated.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention concerne un procédé, un système et un dispositif de réalisation de service VoLTE, pour traiter le problème selon lequel un système de déploiement VoLTE est affecté par un déploiement d'un système IMS requis dans la solution de service VoLTE existante. Un dispositif de proxy est fourni dans un réseau LTE et est relié à un élément de réseau central du domaine de la commutation de circuits (CS), à un eNB et à une entité de gestion de mobilité (MME), respectivement. Le dispositif de proxy comprend un module de communication et un module de traitement. Le module de traitement convertit une signalisation transportée par VoLTE connexe en une signalisation transportant de la voix CS connexe traitable pour l'élément de réseau central du domaine CS, puis transmet celle-ci à l'élément de réseau central du domaine CS. En variante, le module de traitement convertit une signalisation transportant de la voix CS connexe en une signalisation transportée par voLTE connexe, et transmet celle-ci à l'eNB ou au MME.
PCT/CN2015/079068 2015-05-15 2015-05-15 Procédé, système et dispositif de réalisation de service volte WO2016183729A1 (fr)

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CN201580072139.XA CN107251609B (zh) 2015-05-15 2015-05-15 一种VoLTE业务实现方法、系统及设备

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WO2024104180A1 (fr) * 2022-11-17 2024-05-23 中移(成都)信息通信科技有限公司 Procédé et appareil de transmission de données de station de base, et dispositif et support de stockage lisible

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