WO2017000262A1 - 一种srvcc能力信息的传输方法、装置及系统 - Google Patents

一种srvcc能力信息的传输方法、装置及系统 Download PDF

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Publication number
WO2017000262A1
WO2017000262A1 PCT/CN2015/083002 CN2015083002W WO2017000262A1 WO 2017000262 A1 WO2017000262 A1 WO 2017000262A1 CN 2015083002 W CN2015083002 W CN 2015083002W WO 2017000262 A1 WO2017000262 A1 WO 2017000262A1
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WO
WIPO (PCT)
Prior art keywords
network
srvcc
terminal
capability information
network element
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PCT/CN2015/083002
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English (en)
French (fr)
Inventor
王振东
Original Assignee
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/083002 priority Critical patent/WO2017000262A1/zh
Priority to KR1020177034921A priority patent/KR102034533B1/ko
Priority to CN201580039952.7A priority patent/CN106576278B/zh
Priority to EP15896793.5A priority patent/EP3288311A4/en
Publication of WO2017000262A1 publication Critical patent/WO2017000262A1/zh
Priority to US15/857,068 priority patent/US10524178B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • 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
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for transmitting SRVCC capability information.
  • the network standard is constantly evolving. After the introduction of the new network standard, the construction of the standard network is not a one-step process, but needs to go through the process from the hot spot to the wide coverage. Moreover, the network standard of the existing network can still serve the terminal, so there is often a problem that the terminal from the high-standard network to the low-standard network voice continuity during the call.
  • the SRVCC Single Radio Voice Call Continuity
  • the solution requires the terminal to have the ability to convert high-standard data packets into low-standard data packets, which may be referred to as the terminal's SRVCC capability.
  • a CN (Core Network) network element of a high-standard system is required to have a capability of interacting with a low-standard CN network element to ensure call continuity, and the CN network element needs to know the SRVCC capability of the terminal, and notify the capability to the network element.
  • a RAN (Radio Access Network) network element so that the RAN network element starts the SRVCC process accordingly.
  • the SRVCC capability negotiation is involved, which includes the SRVCC capability negotiation of the CN network element and the terminal, and the SRVCC capability negotiation of the CN network element and the RAN network element.
  • the negotiation between the CN network element and the terminal's SRVCC capability involves the process of how the CN network element obtains the terminal's support capability for the SRVCC.
  • the SRVCC capability negotiation process between the CN network element and the RAN network element involves how the CN network element connects the terminal and the CN network element to the SRVCC. The process of supporting the ability to notify the RAN network element.
  • the terminal can be in an attach or TAU (Tracking Area Update) process.
  • the capability information of the terminal to support the SRVCC is reported to the CN network element (MME, mobility management entity) by using an attach request or a TAU request.
  • the CN network element may notify the RAN network element (eNB, evolved) by using the INITIAL CONTEXT SETUP REQUEST and HANDOVER REQUEST messages in the handover or initial context establishment procedure.
  • Type Node B Whether the terminal has SRVCC capability.
  • the SRVCC capability is not required due to the low-standard network.
  • Information so the SRVCC capability information is missing when the terminal is switched into the high-standard network, so that after the terminal enters the high-standard network, the RAN network element cannot obtain the SRVCC capability information of the UE, and thus the SRVCC process cannot be started.
  • voice continuity is not guaranteed and the user's voice experience is degraded.
  • the embodiment of the invention provides a method, a device and a system for transmitting SRVCC capability information, so as to solve the problem of continuity of voice communication after the terminal switches into a high-standard network through different systems.
  • the embodiment of the present invention adopts the following technical solutions:
  • an embodiment of the present invention provides a method for transmitting SRVCC capability information, including:
  • the core network (CN) network element acquires the SRVCC capability information of the terminal from the terminal, where the terminal accesses the second standard network where the CN network element is located from the first standard network by using a different system handover, and the The one-standard network does not support the SRVCC function, and the second-standard network supports the SRVCC function;
  • the CN network element sends the SRVCC capability information to a radio access network (RAN) network element.
  • RAN radio access network
  • the CN network element sends the SRVCC capability information to the RAN network element, including:
  • the CN network element sends a user equipment context modification request message to the RAN network element, where the user equipment context modification request message carries the SRVCC capability information.
  • the acquiring, by the CN network element, the SRVCC capability information of the terminal from the terminal includes:
  • the CN network element obtains the SRVCC capability information of the terminal from the TAU request message in a tracking area update (TAU) process.
  • TAU tracking area update
  • the SRVCC capability information of the terminal includes an SRVCC operation Possibility of the cell.
  • an embodiment of the present invention provides a method for transmitting SRVCC capability information, including:
  • the radio access network (RAN) network element receives the SRVCC capability information of the terminal that is sent by the core network (CN) network element, where the terminal accesses the second RAN network element from the first standard network by using a different system handover.
  • CN core network
  • the RAN network element sends a response message to the CN network element.
  • the RAN network element receives the SRVCC capability information of the terminal that is sent by the CN network element, and includes:
  • the RAN network element receives the user equipment context modification request message sent by the CN network element, where the user equipment context modification request message carries the SRVCC capability information.
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the method further includes:
  • the RAN network element When the voice service of the terminal needs to be switched to the third-standard network, the RAN network element initiates an SRVCC process according to the SRVCC capability information of the terminal.
  • the third mode network does not support the SRVCC function.
  • the third system network is the same as or different from the first system network.
  • an embodiment of the present invention provides a method for transmitting SRVCC capability information, including: a terminal accessing a second standard network from a first standard network by using a different system handover, and the first standard network does not support the SRVCC function.
  • the second standard network supports the SRVCC function;
  • CN core network
  • RAN radio access network
  • the terminal sends the SRVCC capability information of the terminal to the CN network by using a TAU request message in a tracking area update (TAU) process. yuan.
  • TAU tracking area update
  • the embodiment of the present invention provides a device for transmitting SRVCC capability information, which is located in a core network (CN) network element, and includes:
  • Obtaining a module acquiring, by the terminal, the SRVCC capability information of the terminal, where the terminal accesses the second standard network where the CN network element is located from the first standard network by using a different system handover, and the first standard network does not Supporting SRVCC function, the second standard network supporting the SRVCC function;
  • the sending module sends the SRVCC capability information to a radio access network (RAN) network element.
  • RAN radio access network
  • the sending module is specifically configured to:
  • the acquiring module is specifically configured to:
  • the SRVCC capability information of the terminal is obtained from a TAU request message.
  • the SRVCC capability information of the terminal Includes SRVCC operational possibility cells.
  • an embodiment of the present invention provides a transmission apparatus for SRVCC capability information, which is located in a radio access network (RAN) network element, and includes:
  • a receiving module configured to receive the SRVCC capability information of the terminal that is sent by the core network (CN) network element, where the terminal accesses the second standard network where the RAN network element is located from the first standard network by using a different system handover, and The first standard network does not support the SRVCC function, and the second standard network supports the SRVCC function;
  • CN core network
  • a sending module configured to send a response message to the CN network element.
  • the receiving module is specifically configured to:
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the third possible implementation of the fifth aspect further comprising:
  • the processing module is configured to initiate an SRVCC process according to the SRVCC capability information of the terminal when the voice service of the terminal needs to be switched to the third-standard network.
  • the third standard network does not support the SRVCC function.
  • the third system network is the same as or different from the first system network.
  • an embodiment of the present invention provides a device for transmitting SRVCC capability information, which is located at a terminal, and includes:
  • An access module configured to access a second-standard network from a first-standard network by using a different system, where the first-standard network does not support the SRVCC function, and the second-standard network supports the SRVCC function;
  • a sending module configured to send the SRVCC capability information of the terminal to a core network (CN) network element of the second standard network, so that the CN network element may use the SRVCC capability information of the terminal according to its own support capability for the SRVCC
  • RAN radio access network
  • the sending module is specifically configured to:
  • the SRVCC capability information of the terminal is sent to the CN network element by using a TAU request message.
  • the method, device and system for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system switching, the terminal sends the SRVCC capability information to the second standard network.
  • the core network (CN) network element obtains the SRVCC capability information of the terminal from the terminal, and sends the SRVCC capability information to the radio access network (RAN) network element; the RAN network element receives the SRVCC of the terminal sent by the CN network element Capability information and send it to the CN network element Response message.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the terminal when the terminal enters the high-standard network through the different system switching, the low-standard network does not need the SRVCC capability information, so the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the terminal when the terminal enters the high-standard network from the low-standard network, the terminal sends the SRVCC capability information to the CN network element of the second-standard network, and then sends the CN network element to the RAN network. yuan.
  • the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • FIG. 1 is a schematic structural diagram of a different system network according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for transmitting SRVCC capability information according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another method for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of another method for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of transmission interaction of SRVCC capability information in a specific application scenario according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart of another method for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of another method for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of another method for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an apparatus for transmitting SRVCC capability information according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another apparatus for transmitting SRVCC capability information according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another apparatus for transmitting SRVCC capability information according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a CN network element according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a RAN network element according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the heterogeneous system network includes a high-standard network and a low-standard network (taking 2G or 3G networks as an example).
  • the high-standard network takes an LTE network as an example, and includes a CN network element MME 111, an S-GM (Serving GateWay, service gateway) 112, and a RAN network element eNB 113.
  • the low-standard network is exemplified by a 2G or 3G network, including a CN MSC (Mobile Switching Center) 121 and a RAN network element.
  • CN MSC Mobile Switching Center
  • the RAN network element includes a BS (Base Station) 122 and a BSC (Base Station Controller).
  • the RAN network element 122 includes a NodeB (Node B, Node B). 122 and RNC (Radio Network Controller) 123.
  • the system also includes an IMS (IP multimedia subsystem) 130 capable of supporting packet conversion and circuit conversion to support SRVCC implementation.
  • IMS IP multimedia subsystem
  • the terminal 140 (also referred to as user equipment UE) can switch between the 2G or 3G network and the LTE network.
  • the eNB 113 starts according to the support capability of the terminal 140 and the MME 111 for the SRVCC.
  • SRVCC process to ensure the continuity of voice services, where the MME 111 can support the SRVCC capability, in the handover or initial context establishment process,
  • the eNB 113 is notified of the SRVCC capability information of the terminal 140 using the INITIAL CONTEXT SETUP REQUEST and HANDOVER REQUEST messages.
  • the SRVCC capability information of the terminal 140 is sent by the terminal to the MME 111 by using an attach request or a TAU request (TAU request) in an attach (attach) or TAU (Tracking Area Update) flow.
  • the problem that the eNB 113 cannot know the SRVCC capability information when the terminal 140 cuts into the LTE network from the 2G or 3G network through the heterogeneous system handover is not considered. This is because the 2G network and the 3G network do not need to support the SRVCC function. Therefore, the SRVCC capability information is missing during the handover process.
  • the MME 111 cannot use the handover or initial context establishment procedure to use the handover or initial context establishment procedure.
  • the SRVCC capability information is sent to the eNB 113, and the eNB 113 cannot start the SRVCC process, so that the continuity of the subsequent voice service cannot be guaranteed.
  • the CN network element of the high-standard network can obtain the SRVCC capability information of the terminal, and can send the SRVCC capability information to the RAN without relying on the handover or initial context establishment procedure.
  • the network element ensures that the RAN network element obtains the SRVCC capability information of the terminal to ensure the continuity of the subsequent voice service.
  • the UE Context Modification Request message is used to send the SRVCC capability information of the terminal to the RAN network element in the existing user equipment context modification (UE Context Modification) process.
  • the embodiment of the invention provides a method for transmitting SRVCC capability information, which is performed by a CN network element. As shown in FIG. 2, the method includes:
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal.
  • the terminal accesses the second standard network where the CN network element is located from the first standard network by using a different system, and the first standard network does not support the SRVCC function, and the second standard network supports the SRVCC.
  • the CN network element sends the SRVCC capability information to the RAN network element.
  • the terminal can report its SRVCC capability information to the CN network element through the TAU process.
  • the terminal may carry the SRVCC capability information in the TAU request (TAU request) to send the SRVCC capability information to the CN network element, so that the CN network element can obtain the terminal after the terminal accesses the network where the network element is located.
  • SRVCC can Information.
  • the CN network element can send the SRVCC capability information of the terminal to the RAN network element after the SRVCC capability is supported by itself, so that the RAN network element starts the SRVCC process according to the RAT network element when the terminal needs to switch from the high-standard network to the low-standard network. .
  • the CN network element may send the SRVCC capability information to the RAN network element through a new signaling, or may add the SRVCC capability information in the existing signaling process, for example, the UE Context Modification Request message carrying The SRVCC capability information.
  • the SRVCC capability information is newly added in the UE Context Modification Request message.
  • the SRVCC capability information is, for example, an SRVCC Operation Possible cell.
  • the newly added SRVCC Operation Possible may be used as an optional cell, and is sent by the CN network element to the RAN network element.
  • the RAN network element receives the user equipment context modification request message sent by the CN network element, the SRVCC Operation Possible information element may be saved, so that the subsequent terminal performs the different system switching.
  • a method for transmitting SRVCC capability information is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal, and sends the SRVCC capability information to the RAN network element, so that the RAN network element receives the terminal sent by the CN network element.
  • SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the CNV element when the terminal enters the high-standard network from the low-standard network, acquires the SRVCC capability information of the terminal and sends the information to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the CN network element may send the SRVCC capability information to the RAN network element by sending a user equipment context modification request message to the RAN network element. Therefore, on the basis of the implementation shown in FIG. 2, the CN network element sends the SRVCC capability information to the RAN network element in step 202, which may be specifically implemented as step 2021.
  • the specific implementation is shown in Figure 3:
  • the CN network element sends a user equipment context modification request message to the RAN network element.
  • the user equipment context modification request message carries the SRVCC capability information.
  • a method for transmitting SRVCC capability information is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal, and sends the SRVCC capability information to the RAN network element, so that the RAN network element receives the terminal sent by the CN network element.
  • SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the CNV element when the terminal enters the high-standard network from the low-standard network, acquires the SRVCC capability information of the terminal and sends the information to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the CN network element may obtain the SRVCC capability information of the terminal from the TAU request message. Therefore, on the basis of the implementation manner shown in FIG. 2, the CN network element obtains the SRVCC capability information of the terminal from the terminal in step 201, which may be specifically implemented as step 2011.
  • the specific implementation is shown in Figure 4:
  • the CN network element obtains the SRVCC capability information of the terminal from the TAU request message in the TAU process.
  • the method for transmitting SRVCC capability information is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the TAU request message, and sends the SRVCC capability information to the RAN network element, so as to facilitate the RAN network.
  • the element receives the SRVCC capability information of the terminal sent by the CN network element.
  • the CN network element when the terminal enters the high-standard network from the low-standard network, the CN network element obtains the SRVCC capability information of the terminal from the TAU request message in the TAU process, and sends the information to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the embodiment of the present invention provides a method for transmitting SRVCC capability information, where the CN network element uses the UE context modification procedure to send the SRVCC capability information of the terminal to the RAN network element, so that no new Signaling process.
  • FIG. 5 it is a flow chart of the transmission of the SRVCC capability information in a specific application scenario.
  • the LTE network is used as an example, where the CN network element is the MME and the RAN network element is the eBN.
  • the method includes:
  • the CN network element sends a user equipment context modification request message to the RAN network element, where the user equipment context modification request message carries the SRVCC capability information of the terminal.
  • the RAN network element receives the user equipment context modification request message, and sends a user equipment context modification response to the CN network element.
  • the CN network element of the high-standard network can send the SRVCC capability information to the RAN network element by using the UE Context Modification Request message after obtaining the SRVCC capability information of the terminal. Then, the RAN network element returns a UE Context Modification Respones message to the CN network element.
  • a method for transmitting SRVCC capability information is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal, and sends a user equipment context modification request message carrying the SRVCC capability information to the RAN network element, so as to facilitate the RAN network.
  • the element receives the SRVCC capability information of the terminal sent by the CN network element.
  • the CN network element when the terminal enters the high-standard network from the low-standard network, the CN network element obtains the SRVCC capability information of the terminal, and sends the user equipment context modification request message to send the SRVCC capability information. Give the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the embodiment of the invention provides a method for transmitting SRVCC capability information, which is performed by a RAN network element. As shown in FIG. 6, the method includes:
  • the RAN network element receives the SRVCC capability information of the terminal sent by the CN network element.
  • the terminal accesses the second-standard network where the RAN network element is located from the first-standard network by using a different system, and the first-standard network does not support the SRVCC function, and the second-standard network supports the SRVCC.
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the RAN network element sends a response message to the CN network element.
  • the method for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system handover, the RAN network element receives the SRVCC capability information of the terminal sent by the CN network element, and Send a response message to the CN network element.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the RAN network element when the terminal enters the high-standard network from the low-standard network, the RAN network element receives the SRVCC capability information sent by the CN network element, and returns a response message to the CN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the RAN network element may obtain the SRVCC capability information by receiving a user equipment context modification request message that is sent by the CN network element and carries the SRVCC capability information.
  • the RAN network element may initiate an SRVCC process according to the SRVCC capability information of the terminal. Therefore, on the basis of the implementation manner shown in FIG. 6, the implementation manner shown in FIG. 7 may be implemented, that is, after the RAN network element sends a response message to the CN network element in step 402, the step 403 may be performed.
  • the RAN network element initiates an SRVCC process according to the SRVCC capability information of the terminal.
  • the third standard network does not support the SRVCC function; the third standard network is the same as or different from the first standard network.
  • the method for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system handover, the RAN network element receives the SRVCC capability information of the terminal sent by the CN network element, and Send a response message to the CN network element. And when the terminal language When the tone service needs to be switched to the third-standard network, the RAN network element can initiate the SRVCC process according to the SRVCC capability information of the terminal.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the RAN network element when the terminal enters the high-standard network through the different system switching, the low-standard network does not need the SRVCC capability information, so the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the RAN network element when the terminal enters the high-standard network from the low-standard network, the RAN network element receives the SRVCC capability information sent by the CN network element, and returns a response message to the CN network element.
  • the RAN network element can initiate the SRVCC process according to the SRVCC capability information of the terminal.
  • the RAN network element acquires the SRVCC capability information of the terminal, so that the SRVCC process can be started when the terminal switches to the third-standard network, and the terminal enters the high-speed through the different system switching.
  • the continuity problem of the voice communication after the system network also solves the problem of the continuity of the voice communication after the terminal switches to the third system network again.
  • the embodiment of the invention provides a method for transmitting SRVCC capability information, and the method flow is performed by a terminal. As shown in FIG. 8, the method includes:
  • the terminal accesses the second standard network from the first standard network by using different system switching.
  • the first standard network does not support the SRVCC function, and the second standard network supports the SRVCC function.
  • the terminal sends the SRVCC capability information to the CN network element of the second standard network, so that the CN network element sends the SRVCC capability information of the terminal to the RAN network element of the second standard network according to the support capability of the CNVCC.
  • the method for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system switching, the terminal sends the SRVCC capability information to the CN network element of the second standard network. Therefore, the CN network element sends the SRVCC capability information of the terminal to the RAN network element of the second standard network according to its own support capability for the SRVCC.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the embodiment of the present invention can enter the terminal from the low-standard network
  • the terminal sends its SRVCC capability information to the CN network element of the second-standard network, so that the CN network element is sent to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the terminal may send the SRVCC capability information to the CN network element by using a TAU request message.
  • the embodiment of the present invention provides a transmission device 50 for SRVCC capability information, which is located in a CN network element. As shown in FIG. 9, the device 50 includes:
  • the obtaining module 51 is configured to acquire the SRVCC capability information of the terminal from the terminal, where the terminal accesses the second standard network where the CN network element is located from the first standard network by using a different system, and the first standard network does not support the SRVCC function.
  • the second standard network supports the SRVCC function.
  • the sending module 52 sends the SRVCC capability information to the RAN network element.
  • the apparatus for transmitting SRVCC capability information is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal, and sends the SRVCC capability information to the RAN network element, so that the RAN network element receives the terminal sent by the CN network element.
  • SRVCC capability information Compared with the prior art, when the terminal enters the high-standard network through the different system switching, the low-standard network does not need the SRVCC capability information, so the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the CNV element when the terminal enters the high-standard network from the low-standard network, acquires the SRVCC capability information of the terminal and sends the information to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the sending module 52 is specifically configured to:
  • the acquiring module 51 is specifically configured to:
  • the SRVCC capability information of the terminal is obtained from a TAU request message.
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the foregoing obtaining module 51 may be a separately set processor, or may be implemented in one processor of the CN network element, or may be stored in the memory of the CN network element in the form of program code, by A processor of the CN network element invokes and performs its function.
  • the processor described herein may be a CPU or an Application Specific Interlated Circuit (ASIC) or one or other configured to implement an embodiment of the present invention. Multiple integrated circuits.
  • the implementation of the above sending module 52 is similar to the obtaining module 51, and may be integrated with the obtaining module 51 or may be implemented separately.
  • the CN network element has an interface for communicating with the RAN network element, and the obtaining module 51 and the sending module 52 communicate with the RAN network element through the interface.
  • the interface is preferably a wired interface, such as a fiber optic interface, and of course, other interfaces, such as coaxial cable, wireless, and the like.
  • the embodiment of the present invention provides a transmission device 60 for SRVCC capability information, where the device is located in a RAN network element. As shown in FIG. 10, the device 60 includes:
  • the receiving module 61 is configured to receive the SRVCC capability information of the terminal that is sent by the CN network element, where the terminal accesses the second standard network where the RAN network element is located from the first standard network by using a different system handover, and the The one-standard network does not support the SRVCC function, and the second-standard network supports the SRVCC function.
  • the sending module 62 is configured to send a response message to the CN network element.
  • the apparatus for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system handover, the RAN network element receives the SRVCC capability information of the terminal sent by the CN network element, and Send a response message to the CN network element.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the RAN network element when the terminal enters the high-standard network from the low-standard network, the RAN network element receives the SRVCC capability information sent by the CN network element, and returns a response message to the CN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the receiving module 61 is specifically configured to:
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the device 60 further includes:
  • the processing module 63 is configured to initiate an SRVCC process according to the SRVCC capability information of the terminal when the voice service of the terminal needs to be switched to the third-standard network.
  • the third mode network does not support the SRVCC function.
  • the third system network is the same as or different from the first system network.
  • the foregoing receiving module 61 may be a separately set processor, or may be implemented in one processor of the RAN network element, or may be stored in the memory of the RAN network element in the form of program code, by A processor of the RAN network element invokes and performs its functions.
  • the processor described herein can be a CPU or an ASIC or one or more integrated circuits configured to implement embodiments of the present invention.
  • the implementation of the above sending module 62 is similar to that of the receiving module 61, and may be integrated with the receiving module 61, or may be implemented separately.
  • the RAN network element has an interface for communicating with the CN network element, and the receiving module 61 and the sending module 62 communicate with the CN network element through the interface.
  • the interface is preferably a wired interface, such as a fiber optic interface, and of course, other interfaces, such as coaxial cable, wireless, and the like.
  • the implementation of the processing module 63 is the same as that of the receiving module 61, and may be integrated with one or both of the receiving module 61 and the transmitting module 62, or may be implemented separately.
  • the embodiment of the present invention provides a transmission device 70 for SRVCC capability information, and the device is located at a terminal. As shown in FIG. 11, the device 70 includes:
  • the access module 71 is configured to access the second-standard network from the first-standard network by using a different system, and the first-standard network does not support the SRVCC function, and the second-standard network supports the SRVCC function.
  • the sending module 72 is configured to send the SRVCC capability information of the terminal to the CN network element of the second standard network, so that the CN network element performs the terminal according to its own support capability for the SRVCC.
  • the SRVCC capability information is sent to the RAN network element of the second standard network.
  • the sending module 72 is specifically configured to:
  • the SRVCC capability information of the terminal is sent to the CN network element by using a TAU request message.
  • the apparatus for transmitting SRVCC capability information provided by the embodiment of the present invention, when the terminal accesses the second standard network from the first standard network through the different system switching, the terminal sends the SRVCC capability information to the CN network element of the second standard network. Therefore, the CN network element sends the SRVCC capability information of the terminal to the RAN network element of the second standard network according to its own support capability for the SRVCC.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the low-standard network does not need the SRVCC capability information, so the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the terminal when the terminal enters the high-standard network from the low-standard network, the terminal sends the SRVCC capability information to the CN network element of the second-standard network, so that the CN network element is sent to the RAN network. yuan.
  • the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • FIG. 12 is a schematic structural diagram of another embodiment of the core network (CN) network element 80 of the present invention.
  • the CN network element 80 includes a processor 81 and an interface circuit 82.
  • the memory 83 and the bus 84 are also shown.
  • the processor 81, the interface circuit 82 and the memory 83 are connected by a bus 84 and complete each other. Communication between.
  • the processor 81 herein may be a processing component or a collective name of multiple processing components.
  • the processing component may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital singal processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 83 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And save The memory 83 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • the bus 84 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 84 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • the CN network element 80 can also include input and output devices coupled to the bus 84 for connection to other portions, such as the processor 81, via a bus.
  • the processor 81 calls the program code in the memory 83 to perform the operations performed by the CN network element in the foregoing method embodiment.
  • the processor 81 calls the program code in the memory 83 to perform the operations performed by the CN network element in the foregoing method embodiment. For example, include:
  • the terminal accesses the second standard network where the CN network element is located from the first standard network by using a different system handover, and the first standard network
  • the SRVCC function is not supported, and the second standard network supports the SRVCC function.
  • the SRVCC capability information is transmitted by the interface circuit 82 to a Radio Access Network (RAN) network element.
  • RAN Radio Access Network
  • the interface circuit 82 is configured to implement a connection between the CN network element and the RAN network element, and the terminal sends the SRVCC capability information to the RAN network element, and the RAN network element sends the information to the CN network element through the interface between the CN network element and the CN network element, such that the CN The network element can obtain the SRVCC capability information.
  • the processor 81 uses the user equipment context modification procedure to send the SRVCC capability information to the RAN network element by using the user equipment context modification request message, specifically for:
  • the processor 81 obtains the SRVCC capability information of the terminal from the TAU request message in a tracking area update (TAU) process.
  • TAU tracking area update
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • a CN network element is provided by the embodiment of the present invention.
  • the CN network element obtains the SRVCC capability information of the terminal from the terminal, and sends the SRVCC capability information to the RAN network element, so that the RAN network element receives the SRVCC capability of the terminal sent by the CN network element. information.
  • the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the CNV element when the terminal enters the high-standard network from the low-standard network, acquires the SRVCC capability information of the terminal and sends the information to the RAN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • FIG. 13 is a schematic structural diagram of another embodiment of a radio access network (RAN) network element 90 according to the present invention.
  • the RAN network element 90 includes a processor 91 and an interface circuit 92.
  • the memory 93 and the bus 94 are also shown.
  • the processor 91, the interface circuit 92 and the memory 93 are connected by a bus 94 and complete each other. Communication between.
  • the processor 91 herein may be a processing component or a general term of multiple processing components.
  • the processing component may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital singal processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 93 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 93 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • the bus 94 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 94 can be divided into an address bus, a data bus, a control bus, and the like. For the convenience of the table In the figure, only one thick line is shown in Fig. 13, but it does not mean that there is only one bus or one type of bus.
  • the RAN network element 90 can also include input and output devices coupled to the bus 94 for connection to other portions, such as the processor 91, via a bus.
  • the processor 91 calls the program code in the memory 93 to perform the operations performed by the RAN network element in the foregoing method embodiment.
  • the method includes: receiving SRVCC capability information of a terminal that is sent by a core network (CN) network element, where the terminal accesses a second-standard network where the RAN network element is located from a first-standard network by using a different system handover, and The first standard network does not support the SRVCC function, the second standard network supports the SRVCC function; and sends a response message to the CN network element.
  • CN core network
  • the interaction of the processor 91 of the RAN network element with the CN network element is implemented by the interface circuit 92.
  • the processor 91 is specifically configured to:
  • the SRVCC capability information of the terminal includes an SRVCC operation possibility cell.
  • the processor 91 is further configured to:
  • the SRVCC process is initiated according to the SRVCC capability information of the terminal.
  • the third standard network does not support the SRVCC function.
  • the third standard network is the same as or different from the first standard network.
  • the RAN network element when the terminal accesses the second standard network from the first standard network through the different system switching, the RAN network element receives the SRVCC capability information of the terminal sent by the CN network element, and sends the information to the CN network.
  • the meta sends a response message.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the RAN network element when the terminal enters the high-standard network from the low-standard network, the RAN network element receives the SRVCC capability information sent by the CN network element, and returns a response message to the CN network element. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • FIG. 14 is a schematic structural diagram of another embodiment of the terminal 10 of the present invention.
  • the terminal 10 includes a processor 11 and an interface circuit 12, which also shows a memory 13 and a bus 14, which are connected by a bus 14 and are completed by each other. Communication.
  • the processor 11 herein may be a processing component or a general term of multiple processing components.
  • the processing component may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital singal processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 13 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 13 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • the bus 14 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 14 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.
  • the terminal 10 may also include input and output means coupled to the bus 14 for connection to other portions, such as the processor 11, via a bus.
  • the processor 11 calls the program code in the memory 13 for performing the above method implementation.
  • the operation performed by the RAN network element in the example comprising: for accessing a second-standard network from a first-standard network by using a different system, and the first-standard network does not support an SRVCC function, the second-standard network supports the SRVCC function; and its SRVCC
  • the capability information is sent to the core network (CN) network element of the second standard network, so that the CN network element sends the SRVCC capability information of the terminal to the second standard network according to its own support capability for the SRVCC.
  • Radio access network RAN network element Radio access network RAN network element.
  • the above interface circuit 12 is configured to implement communication between the terminal and the RAN network element, and the processor 11 of the terminal can access the RAN network element of the second standard network through the interface circuit, and the SRVCC capability of the RAN network element is obtained by the RAN network element. The information is sent to the CN network element.
  • the processor 11 is specifically configured to:
  • the SRVCC capability information of the terminal is sent to the CN network element by using a TAU request message.
  • the terminal when the terminal accesses the second standard network from the first standard network through the different system switching, the terminal sends the SRVCC capability information to the CN network element of the second standard network, so that the CN network element
  • the SRVCC capability information of the terminal is sent to the RAN network element of the second standard network according to its own support capability for the SRVCC.
  • the first standard network does not support the SRVCC function
  • the second standard network supports the SRVCC function.
  • the low-standard network does not need the SRVCC capability information, so the SRVCC capability information is switched when the terminal switches into the high-standard network.
  • the terminal when the terminal enters the high-standard network from the low-standard network, the terminal sends the SRVCC capability information to the CN network element of the second-standard network, so that the CN network element is sent to the RAN network. yuan. Therefore, after the terminal enters the high-standard network, the RAN network element acquires the SRVCC capability information of the terminal, thereby starting the SRVCC process, and solving the problem of continuity of voice communication after the terminal switches to the high-standard network through the different system.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种单一无线语音通话连续性(SRVCC)能力信息的传输方法、装置及系统，涉及通信技术领域，能够解决终端通过异系统切换进入高制式网络后的语音通信的连续性问题。本发明实施例的方法包括：核心网(CN)网元从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；所述CN网元将所述SRVCC能力信息发送给无线接入网(RAN)网元。

Description

一种SRVCC能力信息的传输方法、装置及系统 技术领域
本发明涉及通信技术领域，尤其涉及一种SRVCC能力信息的传输方法、装置及系统。
背景技术
随着通信技术的发展，网络制式在不断演进。新的网络制式引入之后，该制式网络的建设不是一蹴而就的，而是需要经过从热点区域逐渐到广覆盖的过程。且现网的网络制式仍然能够服务终端，因此常常会出现终端在通话过程中从高制式的网络到低制式网络语音连续性的问题。
为此，引入了SRVCC(Single Radio Voice Call Continuity，单一无线语音通话连续性)解决方案。该方案要求终端具有将高制式的数据包转换为低制式的数据包的能力，在此，可以称为终端的SRVCC能力。同样，要求高制式的CN(Core Network，核心网)网元具备与低制式的CN网元交互以保证通话连续性的能力，且CN网元需要知道终端的SRVCC能力，并将该能力通知给RAN(Radio Access Network，无线接入网)网元，以便RAN网元据此启动SRVCC流程。因此，在SRVCC方案中，涉及到SRVCC能力协商，其包括CN网元与终端的SRVCC能力协商和CN网元与RAN网元的SRVCC能力协商。CN网元与终端的SRVCC能力协商涉及CN网元如何获取终端对SRVCC的支持能力的过程，CN网元与RAN网元的SRVCC能力协商过程涉及CN网元如何将终端和CN网元对SRVCC的支持能力通知给RAN网元的过程。
目前，以已经在网络中部署的LTE(Long Term Evolution，长期演进)网络到2G或3G网络的SRVCC过程为例，终端可以在attach(附着)或TAU(Tracking Area Update，跟踪区域更新)流程中，利用attach request(附着请求)或TAU request(TAU请求)将终端是否支持SRVCC的能力信息上报给CN网元(MME，移动性管理实体)。CN网元可以在切换或初始上下文建立流程中，利用INITIAL CONTEXT SETUP REQUEST(初始上下文建立请求)和HANDOVER REQUEST(切换请求)消息来通知RAN网元(eNB，演进 型节点B)终端是否具备SRVCC能力。然而，当终端是通过异系统切换进入到高制式网络中，即从低制式网络(例如，2G或3G网络)切换到高制式网络(例如，LTE网络)中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，导致该终端在进入该高制式网络之后，RAN网元无法获取该UE的SRVCC能力信息，从而无法启动SRVCC流程，导致语音连续性无法保证，用户语音体验下降。
发明内容
本发明实施例提供一种SRVCC能力信息的传输方法、装置及系统，以解决终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
为达到上述目的，本发明实施例采用如下技术方案：
第一方面，本发明实施例提供一种SRVCC能力信息的传输方法，包括：
核心网(CN)网元从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
所述CN网元将所述SRVCC能力信息发送给无线接入网(RAN)网元。
结合第一方面，在第一方面的第一种可能的实现方式中，所述CN网元将所述SRVCC能力信息发送给RAN网元，包括：
所述CN网元向所述RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
结合第一方面，或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述CN网元从终端获取所述终端的SRVCC能力信息，包括：
所述CN网元在跟踪区域更新(TAU)流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
结合第一方面，或第一方面的第一至第二种可能的实现方式中的任一项，在第一方面的第三种可能的实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
第二方面，本发明实施例提供一种SRVCC能力信息的传输方法，包括：
无线接入网(RAN)网元接收核心网(CN)网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
所述RAN网元向所述CN网元发送响应消息。
结合第二方面，在第二方面的第一种可能的实现方式中，所述RAN网元接收CN网元发送的终端的SRVCC能力信息，包括：
所述RAN网元接收所述CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
结合第二方面，或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
结合第二方面，或第二方面的第一至第二种可能的实现方式中的任一项，在第二方面的第三种可能的实现方式中，还包括：
当所述终端的语音业务需要切换到第三制式网络中时，所述RAN网元根据所述终端的SRVCC能力信息，发起SRVCC流程。
结合第二方面的第三种可能的实现方式，在第二方面的第四种可能的实现方式中，所述第三制式网络不支持SRVCC功能。
结合第二方面的第三或第四种可能的实现方式，在第二方面的第五种可能的实现方式中，所述第三制式网络与所述第一制式网络相同或不同。
第三方面，本发明实施例提供一种SRVCC能力信息的传输方法，包括：终端通过异系统切换从第一制式网络接入第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
所述终端将其SRVCC能力信息发送给所述第二制式网络的核心网(CN)网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的SRVCC能力信息发送给所述第二制式网络的无线接入网(RAN)网元。
结合第三方面，在第三方面的第一种可能的实现方式中，所述终端在跟踪区域更新(TAU)流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
第四方面，本发明实施例提供一种SRVCC能力信息的传输装置，位于核心网(CN)网元，包括：
获取模块，从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
发送模块，将所述SRVCC能力信息发送给无线接入网(RAN)网元。
结合第四方面，在第四方面的第一种可能的实现方式中，所述发送模块，具体用于：
向所述RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
结合第四方面，或第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，所述获取模块，具体用于：
在跟踪区域更新(TAU)流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
结合第四方面，或第四方面的第一至第二种可能的实现方式中任一项所述的装置，在第四方面的第三种可能的实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
第五方面，本发明实施例提供一种SRVCC能力信息的传输装置，位于无线接入网(RAN)网元，包括：
接收模块，用于接收核心网(CN)网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
发送模块，用于向所述CN网元发送响应消息。
结合第五方面，在第五方面的第一种可能的实现方式中，所述接收模块，具体用于：
接收所述CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
结合第五方面，或第五方面的第一种可能的实现方式，在第五方面的第二种可能的实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
结合第五方面，或第五方面的第一至第二种可能的实现方式中任一项所述的装置，在第五方面的第三种可能的实现方式中，还包括：
处理模块，用于当所述终端的语音业务需要切换到第三制式网络中时，根据所述终端的SRVCC能力信息，发起SRVCC流程。
结合第五方面的第三种可能的实现方式，在第五方面的第四种可能的实现方式中，所述第三制式网络不支持SRVCC功能。
结合第五方面的第三或第四种可能的实现方式，在第五方面的第五种可能的实现方式中，所述第三制式网络与所述第一制式网络相同或不同。
第六方面，本发明实施例提供一种SRVCC能力信息的传输装置，位于终端，包括：
接入模块，用于通过异系统切换从第一制式网络接入第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
发送模块，用于将终端的SRVCC能力信息发送给所述第二制式网络的核心网(CN)网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的SRVCC能力信息发送给所述第二制式网络的无线接入网(RAN)网元。
结合第六方面，在第六方面的第一种可能的实现方式中，所述发送模块，具体用于：
在跟踪区域更新(TAU)流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
本发明实施例提供的一种SRVCC能力信息的传输方法、装置及系统，当终端通过异系统切换从第一制式网络接入第二制式网络时，终端将其SRVCC能力信息发送给第二制式网络的核心网(CN)网元；CN网元从终端获取终端的SRVCC能力信息，并将SRVCC能力信息发送给无线接入网(RAN)网元；RAN网元接收CN网元发送的终端的SRVCC能力信息，并向CN网元发送 响应消息。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由终端将其SRVCC能力信息发送给第二制式网络的CN网元，再由CN网元发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本发明实施例提供的一种异系统网络的结构示意图；
图2为本发明实施例提供的一种SRVCC能力信息的传输方法流程图；
图3为本发明实施例提供的另一种SRVCC能力信息的传输方法流程图；
图4为本发明实施例提供的另一种SRVCC能力信息的传输方法流程图；
图5为本发明实施例提供的具体应用场景下SRVCC能力信息的传输交互流程图；
图6为本发明实施例提供的另一种SRVCC能力信息的传输方法流程图；
图7为本发明实施例提供的另一种SRVCC能力信息的传输方法流程图；
图8为本发明实施例提供的另一种SRVCC能力信息的传输方法流程图；
图9为本发明实施例提供的一种SRVCC能力信息的传输装置的结构示意图；
图10为本发明实施例提供的另一种SRVCC能力信息的传输装置的结构示意图；
图11为本发明实施例提供的另一种SRVCC能力信息的传输装置的结构示意图；
图12为本发明实施例提供的一种CN网元的结构示意图；
图13为本发明实施例提供的一种RAN网元的结构示意图；
图14为本发明实施例提供的一种终端的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括复数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何，或所有可能组合。
请参考图1，其为本发明实施例提供的一种异系统网络的结构示意图。该异系统网络包括高制式网络和低制式网络(以2G或3G网络为例)。如图1所示，该高制式网络以LTE网络为例，包括CN网元MME111和S-GM(Serving GateWay，业务网关)112和RAN网元eNB113。低制式网络以2G或3G网络为例，包括CN网元MSC(Mobile Switching Center，移动交换中心)121和RAN网元。在2G网络中，该RAN网元包括BS(Base Station，基站)122和BSC(Base Station Controller，基站控制器)123；在3G网络中，该RAN网元122包括NodeB(Node B，节点B)122和RNC(Radio Network Controller，无线网络控制器)123。该系统还包括IMS(IP multimedia subsystem，IP多媒体子系统)130，IMS130能够支持包转换和电路转换，以为SRVCC实现提供支持。
终端140(又称之为用户设备UE)可以在2G或3G网络与LTE网络之间切换，当终端140从LTE网络切入2G或3G网络时，eNB113根据该终端140和MME111对SRVCC的支持能力启动SRVCC流程，以保证语音业务的连续性，其中MME111可以在自身支持SRVCC能力时，在切换或初始上下文建立流程中， 利用INITIAL CONTEXT SETUP REQUEST(初始上下文建立请求)和HANDOVER REQUEST(切换请求)消息来通知eNB113终端140的SRVCC能力信息。终端140的SRVCC能力信息是终端在attach(附着)或TAU(Tracking Area Update，跟踪区域更新)流程中，利用attach request(附着请求)或TAU request(TAU请求)发送给MME111的。
在以上过程中，均未考虑到当终端140通过异系统切换从2G或3G网络切入该LTE网络时eNB113无法获知该SRVCC能力信息的问题。这是因为2G网络和3G网络并不需要支持SRVCC功能，因此，在切换过程中SRVCC能力信息是缺失的，当终端140切入LTE网络时，MME111无法利用切换或初始上下文建立流程来将终端140的SRVCC能力信息发送给eNB113，导致eNB113无法启动SRVCC流程，从而无法保证后续语音业务的连续性。
本发明考虑到此问题，在终端切入高制式网络后，高制式网络的CN网元可以在获得终端的SRVCC能力信息后，可以不依靠切换或初始上下文建立流程，将该SRVCC能力信息发送给RAN网元，从而保证RAN网元获得终端的SRVCC能力信息，以保证后续语音业务的连续性。较佳的，利用现有的用户设备上下文修改(UE Context Modification)流程中的，用户设备上下文修改请求(UE Context Modification Request)消息将终端的SRVCC能力信息发送给RAN网元。
本发明实施例提供一种SRVCC能力信息的传输方法，该方法流程由CN网元来执行。如图2所示，所述方法包括：
201、CN网元从终端获取所述终端的SRVCC能力信息。
其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
202、CN网元将所述SRVCC能力信息发送给RAN网元。
当终端通过异系统切换从低制式网络进入高制式网络后，终端可以通过TAU流程将其SRVCC能力信息上报给CN网元。例如，终端会在TAU request(TAU请求)中携带SRVCC能力信息，以将该SRVCC能力信息发送给CN网元，如此CN网元便可以在终端接入该网元所在的网络后，获得终端的SRVCC能 力信息。而后，该CN网元可以在自身支持SRVCC能力之后，将该终端的SRVCC能力信息发送给RAN网元，以便RAN网元在终端需要从该高制式网络切换到低制式网络时据此启动SRVCC流程。
CN网元可以通过一新增信令向RAN网元发送SRVCC能力信息，也可以在现有的信令流程中增加该SRVCC能力信息，例如在用户设备上下文修改请求(UE Context Modification Request)消息携带该SRVCC能力信息。如表一所示，在用户设备上下文修改请求(UE Context Modification Request)消息中新增加了SRVCC能力信息。该SRVCC能力信息例如为SRVCC操作可能性(SRVCC Operation Possible)信元。
表一
Figure PCTCN2015083002-appb-000001
Figure PCTCN2015083002-appb-000002
Figure PCTCN2015083002-appb-000003
在本发明实施例中，新增的信元SRVCC Operation Possible可以作为可选的信元，由CN网元向RAN网元发送。当RAN网元在接收到CN网元发送的用户设备上下文修改请求消息时，便可以保存该SRVCC Operation Possible信元，以便后续终端进行异系统切换时使用。
需要说明的是，SRVCC Operation Possible信元在TS36.413协议中章节9.2.1.58中有具体的定义，在本文中不作赘述。
本发明实施例提供的一种SRVCC能力信息的传输方法，CN网元从终端获取终端的SRVCC能力信息，并将SRVCC能力信息发送给RAN网元，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元获取终端的SRVCC能力信息，并发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，CN网元可以通过向RAN网元发送用户设备上下文修改请求消息，来实现将SRVCC能力信息发送至RAN网元。因此，在如图2所示的实现方式的基础上，步骤202中CN网元将SRVCC能力信息发送给RAN网元，可以具体实现为步骤2021。具体实现方式如图3所示：
2021、CN网元向RAN网元发送用户设备上下文修改请求消息。
其中，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
本发明实施例提供的一种SRVCC能力信息的传输方法，CN网元从终端获取终端的SRVCC能力信息，并将SRVCC能力信息发送给RAN网元，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元获取终端的SRVCC能力信息，并发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，CN网元可以从TAU请求消息中获得终端的SRVCC能力信息。因此，在如图2所示的实现方式的基础上，步骤201中CN网元从终端获取终端的SRVCC能力信息，可以具体实现为步骤2011。具体实现方式如图4所示：
2011、CN网元在TAU流程中，从TAU请求消息中获得终端的SRVCC能力信息。
本发明实施例提供的一种SRVCC能力信息的传输方法，CN网元在TAU流程中，从TAU请求消息中获得终端的SRVCC能力信息，并将SRVCC能力信息发送给RAN网元，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元从TAU流程中的TAU请求消息中获取终端的SRVCC能力信息，并发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
本发明实施例提供一种SRVCC能力信息的传输方法，CN网元利用UE上下文修改流程将终端的SRVCC能力信息发送给RAN网元，从而无需增加新的 信令流程。如图5所示，为一种具体应用场景下SRVCC能力信息的传输交互流程图，在此实施例中，以LTE网络为例，其中CN网元为MME，RAN网元为eBN。如图5所示，所述方法包括：
301、CN网元向RAN网元发送用户设备上下文修改请求消息，该用户设备上下文修改请求消息中携带终端的SRVCC能力信息。
302、RAN网元接收该用户设备上下文修改请求消息，并向CN网元发送用户设备上下文修改响应。
如此，在终端切入高制式网络后，高制式网络的CN网元可以在获得终端的SRVCC能力信息后，将该SRVCC能力信息通过用户设备上下文修改请求(UE Context Modification Request)消息发送给RAN网元，之后由RAN网元向CN网元返回用户设备上下文修改响应(UE Context Modification Respones)消息。
本发明实施例提供的一种SRVCC能力信息的传输方法，CN网元从终端获取终端的SRVCC能力信息，并向RAN网元发送携带有SRVCC能力信息的用户设备上下文修改请求消息，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元获取终端的SRVCC能力信息，并通过发送用户设备上下文修改请求消息，来将SRVCC能力信息发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
本发明实施例提供一种SRVCC能力信息的传输方法，该方法流程由RAN网元来执行。如图6所示，所述方法包括：
401、RAN网元接收CN网元发送的终端的SRVCC能力信息。
其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
需要说明的是，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
402、RAN网元向CN网元发送响应消息。
本发明实施例提供的一种SRVCC能力信息的传输方法，当终端通过异系统切换从第一制式网络接入第二制式网络时，RAN网元接收CN网元发送的终端的SRVCC能力信息，并向CN网元发送响应消息。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由RAN网元接收CN网元发送的SRVCC能力信息，并向CN网元返回响应消息。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，RAN网元可以通过接收CN网元发送的携带有SRVCC能力信息的用户设备上下文修改请求消息，来获取SRVCC能力信息。
在本发明实施例的一个实现方式中，当RAN网元向CN网元返回响应消息之后，若终端的语音业务需要切换到第三制式网络中时。RAN网元可以根据终端的SRVCC能力信息，发起SRVCC流程。因此，在如图6所示的实现方式的基础上，还可以实现为如图7所示的实现方式，也就是在步骤402RAN网元向CN网元发送响应消息执行完毕之后，可以执行步骤403：
403、当终端的语音业务需要切换到第三制式网络中时，RAN网元根据所述终端的SRVCC能力信息，发起SRVCC流程。
需要说明的是，所述第三制式网络不支持SRVCC功能；所述第三制式网络与所述第一制式网络相同或不同。
本发明实施例提供的一种SRVCC能力信息的传输方法，当终端通过异系统切换从第一制式网络接入第二制式网络时，RAN网元接收CN网元发送的终端的SRVCC能力信息，并向CN网元发送响应消息。并且，当终端的语 音业务需要切换到第三制式网络中时，RAN网元可以根据终端的SRVCC能力信息，发起SRVCC流程。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由RAN网元接收CN网元发送的SRVCC能力信息，并向CN网元返回响应消息。并且，当终端的语音业务需要切换到第三制式网络中时，RAN网元可以根据终端的SRVCC能力信息，发起SRVCC流程。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而可以在终端切换到第三制式网络中时启动SRVCC流程，在解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题的同时，还解决了当终端再次切换至第三制式网络中后的语音通信的连续性问题。
本发明实施例提供一种SRVCC能力信息的传输方法，该方法流程由终端来执行。如图8所示，所述方法包括：
501、终端通过异系统切换从第一制式网络接入第二制式网络。
其中，所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
502、终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便所述CN网元根据自身对SRVCC的支持能力，将终端的SRVCC能力信息发送给第二制式网络的RAN网元。
本发明实施例提供的一种SRVCC能力信息的传输方法，当终端通过异系统切换从第一制式网络接入第二制式网络时，终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便CN网元根据自身对SRVCC的支持能力，将终端的SRVCC能力信息发送给第二制式网络的RAN网元。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到 高制式网络中时，由终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便于CN网元发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，终端可以通过TAU请求消息将SRVCC能力信息发送给CN网元。
本发明实施例提供一种SRVCC能力信息的传输装置50，该装置位于CN网元，如图9所示，所述装置50包括：
获取模块51，从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入CN网元所在的第二制式网络，且第一制式网络不支持SRVCC功能，第二制式网络支持SRVCC功能。
发送模块52，将所述SRVCC能力信息发送给RAN网元。
本发明实施例提供的一种SRVCC能力信息的传输装置，CN网元从终端获取终端的SRVCC能力信息，并将SRVCC能力信息发送给RAN网元，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元获取终端的SRVCC能力信息，并发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，发送模块52，具体用于：
向RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
在本发明实施例的一个实现方式中，获取模块51，具体用于：
在TAU流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
在本发明实施例的一个实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
需要说明的是，以上获取模块51可以为单独设立的处理器，也可以集成在CN网元的某一个处理器中实现，此外也可以以程序代码的形式存储于CN网元的存储器中，由CN网元的某一个处理器调用并执行其功能，这里所述的处理器可以是一个CPU或者是特定集成电路(Application Specific Intergrated Circuit，ASIC)或者是被配置成实施本发明实施例的一个或多个集成电路。以上发送模块52的实现与获取模块51类似，且可以与获取模块51集成在一起，也可以单独实现。其该CN网元具有与RAN网元通信的接口，获取模块51和发送模块52便是通过该接口与RAN网元通信的。该接口较佳的为有线接口，例如光纤接口，当然，也可以为其它接口形式，例如同轴电缆，无线等。
本发明实施例提供一种SRVCC能力信息的传输装置60，该装置位于RAN网元，如图10所示，所述装置60包括：
接收模块61，用于接收CN网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
发送模块62，用于向所述CN网元发送响应消息。
本发明实施例提供的一种SRVCC能力信息的传输装置，当终端通过异系统切换从第一制式网络接入第二制式网络时，RAN网元接收CN网元发送的终端的SRVCC能力信息，并向CN网元发送响应消息。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由RAN网元接收CN网元发送的SRVCC能力信息，并向CN网元返回响应消息。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
在本发明实施例的一个实现方式中，所述接收模块61，具体用于：
接收CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
在本发明实施例的一个实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
在本发明实施例的一个实现方式中，所述装置60还包括：
处理模块63，用于当所述终端的语音业务需要切换到第三制式网络中时，根据所述终端的SRVCC能力信息，发起SRVCC流程。
在本发明实施例的另一个实现方式中，所述第三制式网络不支持SRVCC功能。
在本发明实施例的另一个实现方式中，所述第三制式网络与所述第一制式网络相同或不同。
需要说明的是，以上接收模块61可以为单独设立的处理器，也可以集成在RAN网元的某一个处理器中实现，此外也可以以程序代码的形式存储于RAN网元的存储器中，由RAN网元的某一个处理器调用并执行其功能，这里所述的处理器可以是一个CPU或者是ASIC或者是被配置成实施本发明实施例的一个或多个集成电路。以上发送模块62的实现与接收模块61类似，且可以与接收模块61集成在一起，也可以单独实现。其该RAN网元具有与CN网元通信的接口，接收模块61和发送模块62便是通过该接口与CN网元通信的。该接口较佳的为有线接口，例如光纤接口，当然，也可以为其它接口形式，例如同轴电缆，无线等。此外，处理模块63的实现同接收模块61，且可以与接收模块61和发送模块62之一或全部集成在一起，也可以单独实现。
本发明实施例提供一种SRVCC能力信息的传输装置70，该装置位于终端，如图11所示，所述装置70包括：
接入模块71，用于通过异系统切换从第一制式网络接入第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
发送模块72，用于将终端的SRVCC能力信息发送给所述第二制式网络的CN网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的 SRVCC能力信息发送给所述第二制式网络的RAN网元。
在本发明实施例的一个实现方式中，所述发送模块72，具体用于：
在TAU流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
本发明实施例提供的一种SRVCC能力信息的传输装置，当终端通过异系统切换从第一制式网络接入第二制式网络时，终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便CN网元根据自身对SRVCC的支持能力，将终端的SRVCC能力信息发送给第二制式网络的RAN网元。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便于CN网元发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
请继续参考图12，为本发明核心网(CN)网元80另一实施例结构示意图。如图12所示，该CN网元80包括处理器81和接口电路82，图中还示出了存储器83和总线84，该处理器81、接口电路82和存储器83通过总线84连接并完成相互间的通信。
需要说明的是，这里的处理器81可以是一个处理元件，也可以是多个处理元件的统称。例如，该处理元件可以是中央处理器(Central Processing Unit，CPU)，也可以是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器83可以是一个存储装置，也可以是多个存储元件的统称，且用于存储可执行程序代码或接入网管理设备运行所需要参数、数据等。且存 储器83可以包括随机存储器(RAM)，也可以包括非易失性存储器(non-volatile memory)，例如磁盘存储器，闪存(Flash)等。
总线84可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。该总线84可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
该CN网元80还可以包括输入输出装置，连接于总线84，以通过总线与处理器81等其它部分连接。
其中，处理器81调用存储器83中的程序代码，用于执行以上方法实施例中CN网元执行的操作。例如，包括：
通过接口电路82从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能。
通过接口电路82将所述SRVCC能力信息发送给无线接入网(RAN)网元。
其中接口电路82用于实现CN网元和RAN网元之间连接，终端将其SRVCC能力信息发送给RAN网元，RAN网元通过与CN网元之间的接口发送给CN网元，如此CN网元便可以获得该SRVCC能力信息。
在本发明实施例的一个实现方式中，处理器81利用用户设备上下文修改流程，通过用户设备上下文修改请求消息将SRVCC能力信息发送给RAN网元，具体用于：
向所述RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
在本发明实施例的一个实现方式中，所述处理器81在跟踪区域更新(TAU)流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
在本发明实施例的一个实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
本发明实施例提供的一种CN网元，CN网元从终端获取终端的SRVCC能力信息，并将SRVCC能力信息发送给RAN网元，以便于RAN网元接收CN网元发送的终端的SRVCC能力信息。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由CN网元获取终端的SRVCC能力信息，并发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
请继续参考图13，为本发明无线接入网(RAN)网元90另一实施例结构示意图。如图13所示，该RAN网元90包括处理器91和接口电路92，图中还示出了存储器93和总线94，该处理器91、接口电路92和存储器93通过总线94连接并完成相互间的通信。
需要说明的是，这里的处理器91可以是一个处理元件，也可以是多个处理元件的统称。例如，该处理元件可以是中央处理器(Central Processing Unit，CPU)，也可以是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器93可以是一个存储装置，也可以是多个存储元件的统称，且用于存储可执行程序代码或接入网管理设备运行所需要参数、数据等。且存储器93可以包括随机存储器(RAM)，也可以包括非易失性存储器(non-volatile memory)，例如磁盘存储器，闪存(Flash)等。
总线94可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。该总线94可以分为地址总线、数据总线、控制总线等。为便于表 示，图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
该RAN网元90还可以包括输入输出装置，连接于总线94，以通过总线与处理器91等其它部分连接。
其中，处理器91调用存储器93中的程序代码，用于执行以上方法实施例中RAN网元执行的操作。例如，包括：接收核心网(CN)网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；向所述CN网元发送响应消息。
该RAN网元的处理器91与CN网元的交互通过接口电路92实现。
在本发明实施例的一个实现方式中，处理器91，具体用于：
接收所述CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
在本发明实施例的一个实现方式中，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
在本发明实施例的一个实现方式中，处理器91，还具体用于：
当所述终端的语音业务需要切换到第三制式网络中时，根据所述终端的SRVCC能力信息，发起SRVCC流程。
在本发明实施例的一个实现方式中，所述第三制式网络不支持SRVCC功能。
在本发明实施例的一个实现方式中，所述第三制式网络与所述第一制式网络相同或不同。
本发明实施例提供的一种RAN网元，当终端通过异系统切换从第一制式网络接入第二制式网络时，RAN网元接收CN网元发送的终端的SRVCC能力信息，并向CN网元发送响应消息。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失 的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由RAN网元接收CN网元发送的SRVCC能力信息，并向CN网元返回响应消息。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
请继续参考图14，为本发明终端10另一实施例结构示意图。如图14所示，该终端10包括处理器11和接口电路12，图中还示出了存储器13和总线14，该处理器11、接口电路12和存储器13通过总线14连接并完成相互间的通信。
需要说明的是，这里的处理器11可以是一个处理元件，也可以是多个处理元件的统称。例如，该处理元件可以是中央处理器(Central Processing Unit，CPU)，也可以是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器13可以是一个存储装置，也可以是多个存储元件的统称，且用于存储可执行程序代码或接入网管理设备运行所需要参数、数据等。且存储器13可以包括随机存储器(RAM)，也可以包括非易失性存储器(non-volatile memory)，例如磁盘存储器，闪存(Flash)等。
总线14可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。该总线14可以分为地址总线、数据总线、控制总线等。为便于表示，图14中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
该终端10还可以包括输入输出装置，连接于总线14，以通过总线与处理器11等其它部分连接。
其中，处理器11调用存储器13中的程序代码，用于执行以上方法实施 例中RAN网元执行的操作。例如，包括：，用于通过异系统切换从第一制式网络接入第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；将其SRVCC能力信息发送给所述第二制式网络的核心网(CN)网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的SRVCC能力信息发送给所述第二制式网络的无线接入网RAN网元。
其中，以上接口电路12用于实现终端与RAN网元的通信，且终端的处理器11可以通过该接口电路接入第二制式网络的RAN网元，且通过该RAN网元将自身的SRVCC能力信息发送给CN网元。
在本发明实施例的一个实现方式中，所述处理器11，具体用于：
在跟踪区域更新(TAU)流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
本发明实施例提供的一种终端，当终端通过异系统切换从第一制式网络接入第二制式网络时，终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便CN网元根据自身对SRVCC的支持能力，将终端的SRVCC能力信息发送给第二制式网络的RAN网元。其中，第一制式网络不支持SRVCC功能，第二制式网络支持所述SRVCC功能。相比较于现有技术中，终端通过异系统切换，从低制式网络进入到高制式网络中时，由于低制式网络无需SRVCC能力信息，因此该SRVCC能力信息在该终端切换入高制式网络中时是缺失的，本发明实施例可以在终端从低制式网络进入到高制式网络中时，由终端将其SRVCC能力信息发送给第二制式网络的CN网元，以便于CN网元发送给RAN网元。因此，该终端在进入该高制式网络之后，RAN网元获取到该终端的SRVCC能力信息，从而启动SRVCC流程，解决了终端通过异系统切换进入高制式网络后的语音通信的连续性问题。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于系统实施例而言，由于其基本相似于方法实施例，所以描述得比较简单，相关之处参见方法实施例的部分说明即可。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (24)

  1. 一种单一无线语音通话连续性SRVCC能力信息的传输方法，其特征在于，包括：
    核心网CN网元从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    所述CN网元将所述SRVCC能力信息发送给无线接入网RAN网元。
  2. 根据权利要求1所述的方法，其特征在于，所述CN网元将所述SRVCC能力信息发送给RAN网元，包括：
    所述CN网元向所述RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述CN网元从终端获取所述终端的SRVCC能力信息，包括：
    所述CN网元在跟踪区域更新TAU流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
  5. 一种单一无线语音通话连续性SRVCC能力信息的传输方法，其特征在于，包括：
    无线接入网RAN网元接收核心网CN网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    所述RAN网元向所述CN网元发送响应消息。
  6. 根据权利要求5所述的方法，其特征在于，所述RAN网元接收CN网元发送的终端的SRVCC能力信息，包括：
    所述RAN网元接收所述CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
  7. 根据权利要求5或6所述的方法，其特征在于，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
  8. 根据权利要求5至7任一项所述的方法，其特征在于，还包括：
    当所述终端的语音业务需要切换到第三制式网络中时，所述RAN网元根据所述终端的SRVCC能力信息，发起SRVCC流程。
  9. 根据权利要求8所述的方法，其特征在于，所述第三制式网络不支持SRVCC功能。
  10. 根据权利要求8或9所述的方法，其特征在于，所述第三制式网络与所述第一制式网络相同或不同。
  11. 一种单一无线语音通话连续性SRVCC能力信息的传输方法，其特征在于，包括：
    终端通过异系统切换从第一制式网络接入第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    所述终端将其SRVCC能力信息发送给所述第二制式网络的核心网CN网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的SRVCC能力信息发送给所述第二制式网络的无线接入网RAN网元。
  12. 根据权利要求11所述的方法，其特征在于，所述终端在跟踪区域更新TAU流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
  13. 一种单一无线语音通话连续性SRVCC能力信息的传输装置，位于核心网CN网元，其特征在于，包括：
    获取模块，从终端获取所述终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述CN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    发送模块，将所述SRVCC能力信息发送给无线接入网RAN网元。
  14. 根据权利要求13所述的装置，其特征在于，所述发送模块，具体用于：
    向所述RAN网元发送用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
  15. 根据权利要求13或14所述的装置，其特征在于，所述获取模块，具体用于：
    在跟踪区域更新TAU流程中，从TAU请求消息中获得所述终端的SRVCC能力信息。
  16. 根据权利要求13至15任一项所述的装置，其特征在于，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
  17. 一种单一无线语音通话连续性SRVCC能力信息的传输装置，位于无线接入网RAN网元，其特征在于，包括：
    接收模块，用于接收核心网CN网元发送的终端的SRVCC能力信息，其中，所述终端通过异系统切换从第一制式网络接入所述RAN网元所在的第二制式网络，且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    发送模块，用于向所述CN网元发送响应消息。
  18. 根据权利要求17所述的装置，其特征在于，所述接收模块，具体用于：
    接收所述CN网元发送的用户设备上下文修改请求消息，所述用户设备上下文修改请求消息中携带所述SRVCC能力信息。
  19. 根据权利要求17或18所述的装置，其特征在于，所述终端的SRVCC能力信息包括SRVCC操作可能性信元。
  20. 根据权利要求17至19任一项所述的装置，其特征在于，还包括：
    处理模块，用于当所述终端的语音业务需要切换到第三制式网络中时，根据所述终端的SRVCC能力信息，发起SRVCC流程。
  21. 根据权利要求20所述的装置，其特征在于，所述第三制式网络不支持SRVCC功能。
  22. 根据权利要求20或21所述的装置，其特征在于，所述第三制式网络与所述第一制式网络相同或不同。
  23. 一种单一无线语音通话连续性SRVCC能力信息的传输装置，位于终端，其特征在于，包括：
    接入模块，用于通过异系统切换从第一制式网络接入第二制式网络， 且所述第一制式网络不支持SRVCC功能，所述第二制式网络支持所述SRVCC功能；
    发送模块，用于将所述终端的SRVCC能力信息发送给所述第二制式网络的核心网CN网元，以便所述CN网元根据自身对SRVCC的支持能力，将所述终端的SRVCC能力信息发送给所述第二制式网络的无线接入网RAN网元。
  24. 根据权利要求23所述的装置，其特征在于，所述发送模块，具体用于：
    在跟踪区域更新TAU流程中，通过TAU请求消息将所述终端的SRVCC能力信息发送给所述CN网元。
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