WO2016173117A1 - 语音电话回落的方法及系统、服务器和移动终端 - Google Patents

语音电话回落的方法及系统、服务器和移动终端 Download PDF

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Publication number
WO2016173117A1
WO2016173117A1 PCT/CN2015/082966 CN2015082966W WO2016173117A1 WO 2016173117 A1 WO2016173117 A1 WO 2016173117A1 CN 2015082966 W CN2015082966 W CN 2015082966W WO 2016173117 A1 WO2016173117 A1 WO 2016173117A1
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Prior art keywords
mobile terminal
voice call
call fallback
service
query
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PCT/CN2015/082966
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English (en)
French (fr)
Inventor
张志刚
黄伟
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2016173117A1 publication Critical patent/WO2016173117A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection

Definitions

  • the present invention relates to the field of terminal technologies, and in particular, to a method for voice call fallback, a CSCF server, a mobile terminal, a mobile management server, and a system for voice call fallback.
  • the LTE network is provided to ensure the reliability of the voice service of the mobile terminal.
  • CSFB Circuit Switched Fallback
  • SRVCC Single Radio Voice Call Continuity
  • the mobile terminal when the mobile terminal or the LTE network cannot support the IMS service, the mobile terminal drops back from the LTE network to the 2G through the voice call drop (CSFB) technology (The 2nd Generation Mobile Communication Technology)/ 3G (the 3 rd Generation mobile communication technology, 3rd generation mobile communication technology) circuit domain service to complete the call; and when the mobile terminal supporting the LTE network and IMS services through dual mode single standby radio voice call continuity (the SRVCC) technology, The mobile terminal can switch from the LTE network to the 2G/3G network, thereby ensuring the continuity of the telephone call.
  • CSFB voice call drop
  • 3G the 3 rd Generation mobile communication technology, 3rd generation mobile communication technology
  • the CSFB mode or the SRVCC mode is selected needs to be configured on the mobile terminal side. Therefore, it is not conducive to the deployment of the IMS service: if the mobile terminal configuration does not support the IMS service, the mobile terminal must be in the LTE network in which the IMS service is deployed.
  • the CSFB is initiated by the OTA (Over The Air, "over the air” technology of mobile terminal applications such as mobile phones) of the LTE network.
  • the invention is based on the above problems, and proposes a new technical solution, which can effectively guide the mobile terminal to perform the voice call fallback operation to ensure the continuity of the voice call, thereby effectively improving the voice call of the mobile terminal supporting the IMS service. Quality, enhance the user experience, and at the same time realize the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state.
  • a method for voice call fallback is provided, which is used for a CSCF server, comprising: receiving protocol signaling for initiating a VoLTE voice service from a mobile terminal; determining whether according to the protocol signaling Transmitting a service query instruction to the mobility management entity of the mobile terminal; receiving a query result from the mobility management entity, and transmitting a voice call fallback command to the mobile terminal according to the query result, so that the mobile terminal performs voice a callback operation, where the protocol signaling includes a target identifier for marking, by the mobile terminal, the voice call fallback operation under the protocol signaling, the query instruction is used to enable the mobility management entity Perform a resource status query.
  • the result of the query of the mobility management entity determines whether a voice call fallback command is sent to the mobile terminal to determine whether the mobile terminal performs a voice call fallback operation, or can perform a VoLTE voice service, that is, causes the terminal to perform a corresponding operation, thus, through the CSCF server and
  • the cooperation of the mobility management entity enables the LTE network to guide the mobile terminal to perform the voice call fallback operation through a protocol (for example, the SIP protocol) to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving
  • the user experience also implements a voice communication mode that enables the LTE network to select the mobile terminal according to the current network state.
  • determining whether to move to the mobile according to the protocol signaling The sending, by the management entity, the service query instruction specifically includes: determining whether the CSCF server supports the target identifier; and when the determination result is yes, sending the service query instruction to the mobility management entity.
  • the LTE network is allowed to guide the mobile terminal to initiate a voice call fallback operation through a protocol (for example, the SIP protocol), that is, the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation). Or VoLTE voice service, thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation).
  • VoLTE voice service thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result and the voice call fallback command to cause the mobile terminal to perform the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • LTE network current network
  • VoLTE voice service status of the mobile terminal a VoLTE voice service status of the mobile terminal
  • load status of the base station to which the mobile terminal belongs a load status of the base station to which the mobile terminal belongs
  • the other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, etc.; and according to the query result from the mobility management entity and the voice call fallback command sent to the mobile mobile terminal Carrying the target network, setting the target network for the mobile terminal to perform the voice call fallback, can finally realize the voice call fallback of the mobile mobile terminal, ensuring the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving user experience.
  • the other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, etc.
  • a second aspect of the present invention provides a CSCF server, including: a first receiving module, configured to receive protocol signaling for initiating a VoLTE voice service from a mobile terminal, and a determining module, configured to determine, according to the protocol signaling, whether Sending a service query instruction to the mobile management entity of the mobile terminal; the first receiving module is further configured to: receive a query result from the mobile management entity; and the first sending module is configured to send the result according to the query result
  • the mobile terminal sends a voice call fallback command to cause the mobile terminal to perform a voice call fallback operation; wherein the protocol letter The command includes a target identifier for marking the voice call back operation of the mobile terminal to support the protocol signaling, and the query instruction is used to enable the mobility management entity to perform a resource status query.
  • the cooperation with the mobile management entity enables the LTE network to guide the mobile terminal to perform the voice call fallback operation through a protocol (for example, the SIP protocol) to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the determining module is specifically configured to: determine whether the CSCF server supports the target identifier; and the first sending module is further configured to: when the determination result is yes, move to the target The management entity sends the service query instruction.
  • the LTE network is allowed to guide the mobile terminal to initiate a voice call fallback operation through a protocol (for example, the SIP protocol), that is, the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation). Or VoLTE voice service, thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation).
  • VoLTE voice service thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result and the voice call fallback command to cause the mobile terminal to perform the voice call fallback operation according to the target network.
  • the content of the resource status query includes but is not limited to: the current network (LTE) a combination of one or a combination of a deployment state, a VoLTE voice service state of the mobile terminal, a load state of the base station to which the mobile terminal belongs, and other network resource states, wherein the other network resource states are other networks than the LTE network
  • LTE current network
  • the other network resource states are other networks than the LTE network
  • a 2G network, a 3G network, etc. and according to the query result from the mobile management entity and the target network carried in the voice call fallback command sent to the mobile terminal, setting the target network in which the mobile terminal performs the voice call fallback, and finally implementing the mobile terminal
  • the voice call is dropped, ensuring the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • a third aspect of the present invention provides a method for voice call fallback, which is used for a mobile terminal, including: adding a target identifier in a protocol signaling, where the target identifier is used to mark the mobile terminal support protocol signaling The voice call fallback operation; transmitting the protocol signaling to a CSCF server; receiving a voice call fallback command from the CSCF server to perform a voice call fallback operation, wherein the voice call fallback command includes the voice The target network of the call back operation.
  • the LTE network can provide the necessary premise guarantee for the mobile mobile terminal to perform the voice call fallback operation through the SIP protocol, and perform the voice call fallback operation according to the target network carried in the voice call fallback command from the CSCF server to ensure the continuity of the voice call.
  • the voice call quality of the mobile terminal supporting the IMS service is effectively improved, and the user experience is improved.
  • the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state is implemented.
  • a fourth aspect of the present invention provides a mobile terminal, including: a marking module, configured to add a target identifier in a protocol signaling, where the target identifier is used to mark the voice under the mobile terminal support protocol signaling
  • the second sending module is configured to send the protocol signaling to the CSCF server
  • the second receiving module is configured to receive a voice call fallback command from the CSCF server, to perform a voice call fallback operation, where The voice call fallback command includes a target network of the voice call fallback operation.
  • the target identifier that is, by modifying the protocol, provides the necessary premise guarantee for the LTE network to guide the mobile mobile terminal to perform the voice call fallback operation through the SIP protocol, and performs voice call fallback according to the target network carried in the voice call fallback command from the CSCF server.
  • the operation ensures the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, improving the user experience, and realizing the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state.
  • a method for voice call fallback for a mobile management entity, comprising: receiving a service query instruction from a CSCF server; performing a resource status query according to the service query instruction; and sending the query result to The CSCF server determines whether the mobile terminal performs a voice call fallback operation.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • the other network resource status is a network other than the LTE network, such as a 2G network, a 3G network, and the like; and when the query result is fed back to the CSCF server, setting the target network in which the mobile terminal performs the voice call fallback In order to finally realize the voice call back of the mobile terminal, the continuity of the voice call is ensured, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • a sixth aspect of the present invention provides a mobility management entity, including: a third receiving module, configured to receive a service query instruction from a CSCF server; and a query module, configured to perform a resource status query according to the service query instruction; And a sending module, configured to send the query result to the CSCF server to determine whether the mobile terminal performs a voice call fallback operation.
  • the resource status query is performed according to the service query instruction from the CSCF server, and the query result is fed back to the CSCF server to determine that the mobile mobile terminal is an execution language.
  • the voice call back operation can still perform the VoLTE voice service.
  • the LTE network guides the mobile terminal to perform the voice call fallback operation through the protocol to ensure the continuity of the voice call, thereby effectively improving
  • the voice call quality of the mobile terminal supporting the IMS service improves the user experience, and at the same time realizes the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • the other network resource status is a network other than the LTE network, such as a 2G network, a 3G network, and the like; and when the query result is fed back to the CSCF server, setting the target network in which the mobile terminal performs the voice call fallback In order to finally realize the voice call back of the mobile terminal, the continuity of the voice call is ensured, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • a system for voice call fallback comprising a CSCF server, a mobile terminal, and a mobility management entity, wherein:
  • the mobile terminal adds a target identifier in the protocol signaling, where the target identifier is used to mark the voice call fallback operation under the mobile terminal support protocol signaling;
  • the mobility management entity performs a resource status query according to the service query instruction
  • the mobility management entity sends the query result to the CSCF server;
  • the mobile terminal performs a voice call fallback operation.
  • the CSCF server determines, according to the protocol signaling, that the service query instruction is sent to the mobility management entity of the mobile terminal, including:
  • the CSCF server sends the service query instruction to the mobility management entity.
  • the content of the resource status query includes at least one of the following:
  • the query result and the voice call fallback command include a target network of the voice call fallback operation, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the technical solution of the present invention can effectively guide the mobile terminal to perform the voice call fallback operation to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, improving the user experience, and realizing the
  • the LTE network can select the voice communication mode of the mobile terminal according to the current network state.
  • FIG. 1 is a flow chart showing a method of voice call fallback according to an embodiment of the present invention
  • FIG. 2 shows a block diagram of a CSCF server in accordance with one embodiment of the present invention
  • FIG. 3 is a flow chart showing a method of voice call fallback according to another embodiment of the present invention.
  • Figure 4 shows a block diagram of a mobile terminal in accordance with one embodiment of the present invention
  • FIG. 5 is a flow chart showing a method of voice call fallback according to still another embodiment of the present invention.
  • Figure 6 shows a block diagram of a mobility management entity in accordance with one embodiment of the present invention.
  • Figure 7 shows a block diagram of a system for voice call fallback in accordance with one embodiment of the present invention.
  • FIG. 8 is a flow chart showing a method of voice call fallback according to still another embodiment of the present invention.
  • FIG. 1 is a flow chart showing a method of voice call fallback according to an embodiment of the present invention.
  • the cooperation of the mobility management entity enables the LTE network to guide the mobile terminal to perform the voice call fallback operation through a protocol (for example, the SIP protocol) to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving user experience,
  • a voice communication mode that enables the LTE network to select the mobile terminal according to the current network state is implemented.
  • the step 104 includes: determining whether the CSCF server supports the target identifier; and when the determination result is yes, sending the service query instruction to the mobility management entity.
  • the LTE network is allowed to guide the mobile terminal to initiate a voice call fallback operation through a protocol (for example, the SIP protocol), that is, the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation). Or VoLTE voice service, thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation).
  • VoLTE voice service thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result and the voice call fallback command to cause the mobile terminal to perform the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • LTE network current network
  • VoLTE voice service status of the mobile terminal a VoLTE voice service status of the mobile terminal
  • load status of the base station to which the mobile terminal belongs a load status of the base station to which the mobile terminal belongs
  • the other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, etc.; and according to the query result from the mobility management entity and the voice call fallback command sent to the mobile mobile terminal Carrying the target network, setting the target network for the mobile terminal to perform the voice call fallback, can finally realize the voice call fallback of the mobile mobile terminal, ensuring the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving user experience.
  • the other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, etc.
  • FIG. 2 shows a block diagram of a CSCF server in accordance with one embodiment of the present invention.
  • the CSCF server 20 includes: a first receiving module 202, configured to receive protocol signaling for initiating a VoLTE voice service from a mobile terminal; and a determining module 204, configured to Determining protocol signaling to determine whether to move to the mobile terminal
  • the mobile management entity sends a service query instruction; the first receiving module 202 is further configured to: receive a query result from the mobile management entity; and the first sending module 206 is configured to send a voice to the mobile terminal according to the query result.
  • the query instruction is configured to enable the mobility management entity to perform a resource status query.
  • the cooperation with the mobile management entity enables the LTE network to guide the mobile terminal to perform the voice call fallback operation through a protocol (for example, the SIP protocol) to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the determining module 204 is specifically configured to: determine whether the CSCF server supports the target identifier; and the first sending module 206 is further configured to: when the determination result is yes, The mobility management entity sends the service query instruction.
  • the LTE network is allowed to guide the mobile terminal to initiate a voice call fallback operation through a protocol (for example, the SIP protocol), that is, the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation). Or VoLTE voice service, thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • a protocol for example, the SIP protocol
  • the LTE network can control the mobile terminal to perform the traditional circuit domain voice service according to the network state (the voice service after the voice call fallback operation).
  • VoLTE voice service thereby ensuring the voice service quality of the mobile terminal supporting the IMS service.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks.
  • Resource status; and the result of the query and The voice call fallback command includes a target network of the voice call fallback operation, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • LTE network current network
  • VoLTE voice service status of the mobile terminal a VoLTE voice service status of the mobile terminal
  • load status of the base station to which the mobile terminal belongs a load status of the base station to which the mobile terminal belongs
  • the other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, etc.; and is carried according to the query result from the mobility management entity and the voice call fallback command sent to the mobile terminal
  • the target network setting the target network for the mobile terminal to perform the voice call fallback, can finally realize the voice call fallback of the mobile terminal, ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving the user experience.
  • FIG. 3 is a flow chart showing a method of voice call fallback according to another embodiment of the present invention.
  • a method for voice call fallback for a mobile terminal, includes: Step 302, adding a target identifier in a protocol signaling, the target identifier being used to mark the mobile
  • the terminal supports the voice call fallback operation under the protocol signaling; step 304, the protocol signaling is sent to the CSCF server; and step 306, receiving a voice call fallback command from the CSCF server to perform a voice call fallback operation,
  • the voice call fallback command includes a target network of the voice call fallback operation.
  • the LTE network can provide the necessary premise guarantee for the mobile mobile terminal to perform the voice call fallback operation through the SIP protocol, and perform the voice call fallback operation according to the target network carried in the voice call fallback command from the CSCF server to ensure the continuity of the voice call.
  • the voice call quality of the mobile terminal supporting the IMS service is effectively improved, and the user experience is improved.
  • the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state is implemented.
  • Figure 4 shows a block diagram of a mobile terminal in accordance with one embodiment of the present invention.
  • a mobile terminal 40 includes: a marking module 402, configured to add a target identifier in a protocol signaling, where the target identifier is used to mark the shift
  • the mobile terminal supports the voice call fallback operation under the protocol signaling;
  • the second sending module 404 is configured to send the protocol signaling to the CSCF server;
  • the second receiving module 406 is configured to receive the voice from the CSCF server.
  • the callback command is executed to perform a voice call fallback operation, wherein the voice call fallback command includes a target network of the voice call fallback operation.
  • the LTE network can provide the necessary premise guarantee for the mobile mobile terminal to perform the voice call fallback operation through the SIP protocol, and perform the voice call fallback operation according to the target network carried in the voice call fallback command from the CSCF server to ensure the continuity of the voice call.
  • the voice call quality of the mobile terminal supporting the IMS service is effectively improved, and the user experience is improved.
  • the voice communication mode that enables the LTE network to select the mobile terminal according to the current network state is implemented.
  • FIG. 5 is a flow chart showing a method of voice call fallback according to still another embodiment of the present invention.
  • a method for voice call fallback for a mobility management entity, includes: Step 502: Receive a service query instruction from a CSCF server; Step 504, according to the service query instruction Performing a resource status query; step 506, sending a query result to the CSCF server to determine whether the mobile terminal performs a voice call fallback operation.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • LTE network current network
  • VoLTE voice service status of the mobile terminal a load status of the base station to which the mobile terminal belongs
  • other network resource status is other networks than the LTE network, such as a 2G network, a 3G network, and the like; and when the query result is fed back to the CSCF server, setting the mobile terminal to perform voice call fallback
  • the target network is used to finally realize the voice call back of the mobile terminal, ensuring the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • Figure 6 shows a block diagram of a mobility management entity in accordance with one embodiment of the present invention.
  • the mobility management entity 60 includes: a third receiving module 602, configured to receive a service query instruction from a CSCF server; and a query module 604, configured to query, according to the service query Performing a resource status query; the third sending module 606 is configured to send the query result to the CSCF server to determine whether the mobile terminal performs a voice call fallback operation.
  • the resource status query is performed according to the service query instruction from the CSCF server, and the query result is fed back to the CSCF server to determine whether the mobile mobile terminal performs the voice call fallback operation or the VoLTE voice service, and thus, through the CSCF.
  • the collaboration between the server and the mobility management entity enables the LTE network to guide the mobile terminal to perform the voice call fallback operation through the protocol to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • a voice communication method that enables the LTE network to select the mobile terminal according to the current network state is implemented.
  • the content of the resource status query includes at least one of the following: a current network deployment status, a VoLTE voice service status of the mobile terminal, a load status of a base station to which the mobile terminal belongs, and other networks. a resource status; and the target network of the voice call fallback operation included in the query result, so that the mobile terminal performs the voice call fallback operation according to the target network.
  • the content of the resource status query includes, but is not limited to, one of a current network (LTE network) deployment status, a VoLTE voice service status of the mobile terminal, a load status of the base station to which the mobile terminal belongs, and other network resource status.
  • the other network resource status is a network other than the LTE network, such as a 2G network, a 3G network, and the like; and when the query result is fed back to the CSCF server, setting the target network in which the mobile terminal performs the voice call fallback In order to finally realize the voice call back of the mobile terminal, the continuity of the voice call is ensured, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service and improving the user experience.
  • Figure 7 shows a block diagram of a system for voice call fallback in accordance with one embodiment of the present invention.
  • a system 70 for voice call fallback includes: the CSCF server 20 according to any one of the above technical solutions, the mobile terminal 40 as described in the above technical solution, and the above technical solution.
  • the mobile management entity 60 of any one of the above, the system has the same technical effects as the CSCF server 20, the mobile terminal 40, and the mobility management entity 60 described in any of the foregoing technical solutions, and details are not described herein again. .
  • FIG. 8 is a flow chart showing a method of voice call fallback according to still another embodiment of the present invention.
  • the process of the mobile terminal and the network device collaborating to complete the voice call fallback operation through the SIP protocol is as follows:
  • the terminal adds a flag (target identifier) to the SIP-INVITE message (SIP signaling) of the VoLTE voice service, such as Accept-Contact, to identify that the mobile terminal supports the CSFB operation under the SIP protocol.
  • a flag target identifier
  • SIP signaling SIP signaling
  • the service query command is sent to the mobility management entity (MME) that manages the mobile terminal to query whether the mobile terminal performs the IMS VoLTE service or needs to be executed.
  • MME mobility management entity
  • the MME is based on the current network deployment (current network deployment status), the service status of the terminal (VoLTE voice service status of the mobile terminal), and the load of the eNB (base station) to which the mobile terminal is attached (the load of the base station to which the mobile terminal belongs) Status), and other network resource status, determine the voice service mode of the mobile terminal.
  • the MME If it is the CSFB mode, the MME returns the result to the CSCF and carries the destination network (target network) that the mobile terminal drops back, and the MME notifies the mobile terminal to drop the destination network to prepare the circuit resources.
  • the CSCF returns a SIP-4xx message to the mobile terminal (the client has an error indicating that the request message contains a syntax error or the server cannot complete the processing of the request message), indicating that the VoLTE voice service cannot be performed, and the specific reason may be 488. -Not Acceptable (not accepted here), etc., and in this message, the destination network that needs to be dropped by the mobile terminal is attached.
  • the SIP protocol needs to modify and supplement the destination network field accordingly, including: the type of the destination network ( For example, GSM (Global System For Mobile Communications), WCDMA (Wide Band Code Division Multiple Access) Code division multiple access (CDMA), CDMA (Code Division Multiple Access), etc., destination network frequency band and frequency point, etc.; and the terminal needs to process the network field of this destination, and perform voice call fallback operation according to its content.
  • GSM Global System For Mobile Communications
  • WCDMA Wide Band Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • the mobile terminal After receiving the SIP-4xx message, the mobile terminal performs a CSFB operation according to the mobile terminal's fallback destination network information, and performs voice telephony service in the destination network circuit domain.
  • the CSCF is notified to continue the VoLTE service, and the CSCF sends the SIP-INVITE message to the CSCF of the called terminal.
  • the invention combines the CSFB technology and provides a method for selecting a mobile terminal voice communication mode according to the current network state through the cooperation of the CSCF and the MME, and can effectively improve the voice call quality of the mobile terminal supporting the IMS service.
  • the technical solution of the present invention is specifically described above with reference to the accompanying drawings, which can effectively guide the mobile terminal to perform the voice call fallback operation to ensure the continuity of the voice call, thereby effectively improving the voice call quality of the mobile terminal supporting the IMS service, and improving the user.
  • the experience also realizes a voice communication mode that enables the LTE network to select the mobile terminal according to the current network state.

Abstract

本发明提出了一种语音电话回落的方法、一种CSCF服务器、一种移动终端、一种移动管理实体和一种语音电话回落的系统，所述方法包括：接收来自移动终端的发起VoLTE语音业务的协议信令；根据协议信令确定是否向移动终端的移动管理实体发送业务查询指令；接收来自移动管理实体的查询结果，并根据查询结果向移动终端发送语音电话回落命令，以使移动终端执行语音电话回落操作。通过本发明的技术方案，可以有效地指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。

Description

语音电话回落的方法及系统、服务器和移动终端
本申请要求于2015年04月30日提交中国专利局，申请号为CN 201510218934.7、发明名称为“语音电话回落的方法及系统、服务器和移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及终端技术领域，具体而言，涉及一种语音电话回落的方法、一种CSCF服务器、一种移动终端、一种移动管理服务器和一种语音电话回落的系统。
背景技术
在目前的LTE(Long Term Evolution，长期演进)网络覆盖不完全和IMS(IP Multimedia Subsystem，IP多媒体系统)业务尚未完全展开的情况下，为了保障移动终端的语音业务的可靠性，LTE网络提供了CSFB(Circuit Switched Fallback，语音电话回落)和SRVCC(Single Radio Voice Call Continuity，双模单待无线语音呼叫连续性)两种技术。
在相关技术中，当移动终端或LTE网络无法支持IMS业务时，移动终端通过语音电话回落(CSFB)技术从LTE网络回落到2G(The 2nd Generation Mobile Communication Technology，第2代移动通信技术)/3G(The 3rd Generation Mobile Communication Technology，第3代移动通信技术)电路域完成通话业务；而当移动终端和LTE网络支持IMS业务时，通过双模单待无线语音呼叫连续性(SRVCC)技术，移动终端可以从LTE网络切换到2G/3G网络，从而保证电话呼叫的连续性。
然而，是选择CSFB模式还是SRVCC模式，需要在移动终端侧进行配置，如此，不利于IMS业务的部署：如果移动终端配置不支持IMS业务，移动终端即使在部署了IMS业务的LTE网络中也须通过LTE网络的OTA(Over The Air，手机等移动终端应用的“空中下载”技术)信令发起CSFB，那么，随着IMS业务在网络侧部署的逐渐成熟，升级移动终端支持IMS业务需要大量的时间和精力，同时也影响原有2G/3G网络向LTE网络的迁移； 如果移动终端支持IMS业务，移动终端和LTE网络不会发起CSFB，而是使用VoLTE(Voice Over LTE，基于IMS的语音业务)和SRVCC技术进行语音通话，那么，在LTE网络和IMS业务部署尚未成熟的地区，会产生大量的呼叫失败和掉话的情况，而且也无法保证语音通话的质量。
因此，需要一种新的语音回落的方法，以解决上述技术问题。
发明内容
本发明正是基于上述问题，提出了一种新的技术方案，可以有效地指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
有鉴于此，本发明的第一方面，提出了一种语音电话回落的方法，用于CSCF服务器，包括：接收来自移动终端的发起VoLTE语音业务的协议信令；根据所述协议信令确定是否向所述移动终端的移动管理实体发送业务查询指令；接收来自所述移动管理实体的查询结果，并根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，所述协议信令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
在该技术方案中，根据移动终端发起的VoLTE语音业务的且包括目标标识的协议信令(比如，SIP协议信令)确定是否向移动管理实体发送业务查询指令，并在确定发送后，根据来自移动管理实体的查询结果确定是否向移动终端发送语音电话回落命令，以确定该移动终端是执行语音电话回落操作，还是可以进行VoLTE语音业务，即：使终端执行相应操作，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议(比如，SIP协议)指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，根据所述协议信令确定是否向所述移动 管理实体发送所述业务查询指令，具体包括：判断所述CSCF服务器是否支持所述目标标识；在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
在该技术方案中，在接收到包含目标标识的协议信令后，并在判定支持该目标标识时，向移动管理实体发送业务查询指令，即通过对网络设备CSCF服务器和移动管理实体进行修改，允许LTE网络通过协议(比如，SIP协议)指导移动终端发起语音电话回落操作，也就是说，LTE网络可以根据自身网络状态控制移动终端进行传统电路域语音业务(语音电话回落操作后的语音业务)或者VoLTE语音业务，从而保证支持IMS业务的移动终端的语音业务质量。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及根据来自移动管理实体的查询结果和向移动移动终端发送的语音电话回落命令中携带的目标网络，设置移动终端执行语音电话回落的目标网络，可以最终实现移动移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
本发明的第二方面，提出了一种CSCF服务器，包括：第一接收模块，用于接收来自移动终端的发起VoLTE语音业务的协议信令；确定模块，用于根据所述协议信令确定是否向所述移动终端的移动管理实体发送业务查询指令；所述第一接收模块还用于：接收来自所述移动管理实体的查询结果；第一发送模块，用于根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，所述协议信 令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
在该技术方案中，根据移动终端发起的VoLTE语音业务的且包括目标标识的协议信令(比如，SIP协议信令)确定是否向移动管理实体发送业务查询指令，并在确定发送后，根据来自移动管理实体的查询结果确定是否向移动终端发送语音电话回落命令，以确定该移动终端是执行语音电话回落操作，还是可以进行VoLTE语音业务，即：使移动终端执行相应操作，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议(比如，SIP协议)指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，所述确定模块具体用于：判断所述CSCF服务器是否支持所述目标标识；所述第一发送模块还用于：在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
在该技术方案中，在接收到包含目标标识的协议信令后，并在判定支持该目标标识时，向移动管理实体发送业务查询指令，即通过对网络设备CSCF服务器和移动管理实体进行修改，允许LTE网络通过协议(比如，SIP协议)指导移动终端发起语音电话回落操作，也就是说，LTE网络可以根据自身网络状态控制移动终端进行传统电路域语音业务(语音电话回落操作后的语音业务)或者VoLTE语音业务，从而保证支持IMS业务的移动终端的语音业务质量。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE 网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及根据来自移动管理实体的查询结果和向移动终端发送的语音电话回落命令中携带的目标网络，设置移动终端执行语音电话回落的目标网络，可以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
本发明的第三方面，提出了一种语音电话回落的方法，用于移动终端，包括：在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；将所述协议信令发送至CSCF服务器；接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
在该技术方案中，在向CSCF服务器发送协议信令之前，通过在协议信令中添加用于标记该移动终端支持协议信令下的语音电话回落操作的目标标识，即通过修改协议，为使LTE网络可以通过SIP协议指导移动移动终端执行语音电话回落操作提供必要的前提保障，并根据来自CSCF服务器的语音电话回落命令中携带的目标网络执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
本发明的第四方面，提出了一种移动终端，包括：标记模块，用于在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；第二发送模块，用于将所述协议信令发送至CSCF服务器；第二接收模块，用于接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
在该技术方案中，在向CSCF服务器发送协议信令之前，通过在协议信令中添加用于标记该移动终端支持协议信令下的语音电话回落操作的目 标标识，即通过修改协议，为使LTE网络可以通过SIP协议指导移动移动终端执行语音电话回落操作提供必要的前提保障，并根据来自CSCF服务器的语音电话回落命令中携带的目标网络执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
本发明的第五方面，提出了一种语音电话回落的方法，用于移动管理实体，包括：接收来自CSCF服务器的业务查询指令；根据所述业务查询指令进行资源状态查询；将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及在向CSCF服务器反馈的查询结果时，设置移动终端执行语音电话回落的目标网络，以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
本发明的第六方面，提出了一种移动管理实体，包括：第三接收模块，用于接收来自CSCF服务器的业务查询指令；查询模块，用于根据所述业务查询指令进行资源状态查询；第三发送模块，用于将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
在该技术方案中，根据来自CSCF服务器的业务查询指令进行资源状态查询，并向CSCF服务器反馈查询结果，以确定移动移动终端是执行语 音电话回落操作，还是可以进行VoLTE语音业务，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及在向CSCF服务器反馈的查询结果时，设置移动终端执行语音电话回落的目标网络，以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
本发明的第七方面，提出了一种语音电话回落的系统，包括CSCF服务器、移动终端和移动管理实体，其中：
所述移动终端在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；
所述移动终端将所述协议信令发送至所述CSCF服务器；
所述CSCF服务器根据所述协议信令确定向所述移动终端的移动管理实体发送业务查询指令；
所述移动管理实体根据所述业务查询指令进行资源状态查询；
所述移动管理实体将查询结果发送至所述CSCF服务器；
所述CSCF服务器根据所述查询结果向所述移动终端发送语音电话回落命令，其中，所述语音电话回落命令中包括所述语音电话回落操作的目 标网络；
所述移动终端执行语音电话回落操作。
在上述技术方案中，优选地，所述CSCF服务器根据所述协议信令确定向所述移动终端的移动管理实体发送业务查询指令，包括：
所述CSCF服务器判断所述CSCF服务器是否支持所述目标标识；
在判断结果为是时，所述CSCF服务器向所述移动管理实体发送所述业务查询指令。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：
当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
通过本发明的技术方案，可以有效地指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
附图说明
图1示出了根据本发明的一个实施例的语音电话回落的方法的流程示意图；
图2示出了根据本发明的一个实施例的CSCF服务器的框图；
图3示出了根据本发明的另一个实施例的语音电话回落的方法的流程示意图；
图4示出了根据本发明的一个实施例的移动终端的框图；
图5示出了根据本发明的又一个实施例的语音电话回落的方法的流程示意图；
图6示出了根据本发明的一个实施例的移动管理实体的框图；
图7示出了根据本发明的一个实施例的语音电话回落的系统的框图；
图8示出了根据本发明的再一个实施例的语音电话回落的方法的流程示意图。
具体实施方式
为了可以更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的一个实施例的语音电话回落的方法的流程示意图。
如图1所示，根据本发明的一个实施例的语音电话回落的方法，用于CSCF服务器，包括：步骤102，接收来自移动终端的发起VoLTE语音业务的协议信令；步骤104，根据所述协议信令确定是否向所述移动终端的移动管理实体发送业务查询指令；步骤106，接收来自所述移动管理实体的查询结果，并根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，所述协议信令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
在该技术方案中，根据移动终端发起的VoLTE语音业务的且包括目标标识的协议信令(比如，SIP协议信令)确定是否向移动管理实体发送业务查询指令，并在确定发送后，根据来自移动管理实体的查询结果确定是否向移动终端发送语音电话回落命令，以确定该移动终端是执行语音电话回落操作，还是可以进行VoLTE语音业务，即：使终端执行相应操作，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议(比如，SIP协议)指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验， 同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，所述步骤104具体包括：判断所述CSCF服务器是否支持所述目标标识；在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
在该技术方案中，在接收到包含目标标识的协议信令后，并在判定支持该目标标识时，向移动管理实体发送业务查询指令，即通过对网络设备CSCF服务器和移动管理实体进行修改，允许LTE网络通过协议(比如，SIP协议)指导移动终端发起语音电话回落操作，也就是说，LTE网络可以根据自身网络状态控制移动终端进行传统电路域语音业务(语音电话回落操作后的语音业务)或者VoLTE语音业务，从而保证支持IMS业务的移动终端的语音业务质量。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及根据来自移动管理实体的查询结果和向移动移动终端发送的语音电话回落命令中携带的目标网络，设置移动终端执行语音电话回落的目标网络，可以最终实现移动移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
图2示出了根据本发明的一个实施例的CSCF服务器的框图。
如图2所示，根据本发明的一个实施例的CSCF服务器20，包括：第一接收模块202，用于接收来自移动终端的发起VoLTE语音业务的协议信令；确定模块204，用于根据所述协议信令确定是否向所述移动终端的移 动管理实体发送业务查询指令；所述第一接收模块202还用于：接收来自所述移动管理实体的查询结果；第一发送模块206，用于根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，所述协议信令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
在该技术方案中，根据移动终端发起的VoLTE语音业务的且包括目标标识的协议信令(比如，SIP协议信令)确定是否向移动管理实体发送业务查询指令，并在确定发送后，根据来自移动管理实体的查询结果确定是否向移动终端发送语音电话回落命令，以确定该移动终端是执行语音电话回落操作，还是可以进行VoLTE语音业务，即：使移动终端执行相应操作，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议(比如，SIP协议)指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，所述确定模块204具体用于：判断所述CSCF服务器是否支持所述目标标识；所述第一发送模块206还用于：在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
在该技术方案中，在接收到包含目标标识的协议信令后，并在判定支持该目标标识时，向移动管理实体发送业务查询指令，即通过对网络设备CSCF服务器和移动管理实体进行修改，允许LTE网络通过协议(比如，SIP协议)指导移动终端发起语音电话回落操作，也就是说，LTE网络可以根据自身网络状态控制移动终端进行传统电路域语音业务(语音电话回落操作后的语音业务)或者VoLTE语音业务，从而保证支持IMS业务的移动终端的语音业务质量。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果和 所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及根据来自移动管理实体的查询结果和向移动终端发送的语音电话回落命令中携带的目标网络，设置移动终端执行语音电话回落的目标网络，可以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
图3示出了根据本发明的另一个实施例的语音电话回落的方法的流程示意图。
如图3所示，根据本发明的另一个实施例的语音电话回落的方法，用于移动终端，包括：步骤302，在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；步骤304，将所述协议信令发送至CSCF服务器；步骤306，接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
在该技术方案中，在向CSCF服务器发送协议信令之前，通过在协议信令中添加用于标记该移动终端支持协议信令下的语音电话回落操作的目标标识，即通过修改协议，为使LTE网络可以通过SIP协议指导移动移动终端执行语音电话回落操作提供必要的前提保障，并根据来自CSCF服务器的语音电话回落命令中携带的目标网络执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
图4示出了根据本发明的一个实施例的移动终端的框图。
如图4所示，根据本发明的一个实施例的移动终端40，包括：标记模块402，用于在协议信令中添加目标标识，所述目标标识用于标记所述移 动终端支持协议信令下的所述语音电话回落操作；第二发送模块404，用于将所述协议信令发送至CSCF服务器；第二接收模块406，用于接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
在该技术方案中，在向CSCF服务器发送协议信令之前，通过在协议信令中添加用于标记该移动终端支持协议信令下的语音电话回落操作的目标标识，即通过修改协议，为使LTE网络可以通过SIP协议指导移动移动终端执行语音电话回落操作提供必要的前提保障，并根据来自CSCF服务器的语音电话回落命令中携带的目标网络执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
图5示出了根据本发明的又一个实施例的语音电话回落的方法的流程示意图。
如图5所示，根据本发明的又一个实施例的语音电话回落的方法，用于移动管理实体，包括：步骤502，接收来自CSCF服务器的业务查询指令；步骤504，根据所述业务查询指令进行资源状态查询；步骤506，将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及在向CSCF服务器反馈的查询结果时，设置移动终端执行语音电话回落 的目标网络，以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
图6示出了根据本发明的一个实施例的移动管理实体的框图。
如图6所示，根据本发明的一个实施例的移动管理实体60，包括：第三接收模块602，用于接收来自CSCF服务器的业务查询指令；查询模块604，用于根据所述业务查询指令进行资源状态查询；第三发送模块606，用于将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
在该技术方案中，根据来自CSCF服务器的业务查询指令进行资源状态查询，并向CSCF服务器反馈查询结果，以确定移动移动终端是执行语音电话回落操作，还是可以进行VoLTE语音业务，如此，通过CSCF服务器和移动管理实体的协同，使LTE网络通过协议指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
在上述技术方案中，优选地，所述资源状态查询的内容至少包括以下之一：当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
在该技术方案中，资源状态查询的内容包括但不限于：当前网络(LTE网络)部署状态、移动终端的VoLTE语音业务状态、移动终端所归属的基站的负载状态以及其他网络资源状态中的一个或几个的组合，其中，其他网络资源状态为除LTE网络外的其他网络，比如2G网络、3G网络等；以及在向CSCF服务器反馈的查询结果时，设置移动终端执行语音电话回落的目标网络，以最终实现移动终端的语音电话回落，确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验。
图7示出了根据本发明的一个实施例的语音电话回落的系统的框图。
如图7所示，根据本发明的一个实施例的语音电话回落的系统70，包括：如上技术方案中任一项所述的CSCF服务器20、如上技术方案所述的移动终端40和如上技术方案中任一项所述的移动管理实体60，因此，该系统具有和上述技术方案中任一项所述的CSCF服务器20、移动终端40以及移动管理实体60相同的技术效果，在此不再赘述。
图8示出了根据本发明的再一个实施例的语音电话回落的方法的流程示意图。
如图8所示，移动终端和网络设备协同通过SIP协议完成语音电话回落操作的流程具体如下：
(1)终端在发起VoLTE语音业务的电话SIP-INVITE消息(SIP信令)中，比如Accept-Contact，增加一个标记(目标标识)，标识该移动终端支持SIP协议下的CSFB操作。
(2)处理该SIP-INVITE消息的CSCF如果同时支持该标识，则先向管理该移动终端的移动管理实体(MME)发送业务查询指令，以查询该移动终端是进行IMS VoLTE业务，还是需要执行CSFB。
(3)MME根据当前网络部署情况(当前网络部署状态)、该终端的业务情况(移动终端的VoLTE语音业务状态)以及该移动终端附着的eNB(基站)的负载(移动终端归属的基站的负载状态)，以及其他网络资源状态，决定该移动终端此次的语音业务方式。
(4)如果是CSFB方式，MME向CSCF返回结果，并携带移动终端回落的目的网络(目标网络)，同时MME通知移动终端回落的目的网络准备电路资源。
(5)CSCF向移动终端返回SIP-4xx消息(客户端出错，表示请求消息中包含语法错误或者服务器端不能完成对该请求消息的处理)，表示无法进行VoLTE语音业务，其具体原因可以是488-Not Acceptable(此处不接受)等，并且在这条消息里面附带需要移动终端回落的目的网络，为达到此目的，SIP协议需要相应修改、补充目的网络字段，内容包括：目的网络的类型(比如GSM(Global System For Mobile Communications，全球移动通信系统)、WCDMA(Wide Band Code Division Multiple Access，宽频 码分多址)、CDMA(Code Division Multiple Access，码分多址)等)、目的网络频段和频点等；而终端需要对此目的网络字段进行处理，根据其内容执行语音电话回落操作。
(6)移动终端接收到SIP-4xx消息后，根据其中的移动终端回落目的网络信息执行CSFB操作，在目的网络电路域进行语音电话业务。
在上述(3)中，如果MME发现当前移动终端附着的LTE网络小区能够支撑IMS业务，则通知CSCF继续进行VoLTE业务，CSCF向被呼叫终端的CSCF发送上述SIP-INVITE消息。
本发明结合CSFB技术，通过CSCF和MME的协同，给LTE网络提供了根据当前网络状态选择移动终端语音通信方式的方法，能够有效提高支持IMS业务的移动终端语音通话质量。
以上结合附图详细说明了本发明的技术方案，可以有效地指导移动终端执行语音电话回落操作，以确保语音电话的连续性，进而有效地提高支持IMS业务的移动终端的语音通话质量，提升用户体验，同时实现了使LTE网络可以根据当前网络状态选择移动终端的语音通信方式。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (15)

  1. 一种语音电话回落的方法，用于CSCF服务器，其特征在于，包括：
    接收来自移动终端的发起VoLTE语音业务的协议信令；
    根据所述协议信令确定是否向所述移动终端的移动管理实体发送业务查询指令；
    接收来自所述移动管理实体的查询结果，并根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，
    所述协议信令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
  2. 根据权利要求1所述的语音电话回落的方法，其特征在于，根据所述协议信令确定是否向所述移动管理实体发送所述业务查询指令，具体包括：
    判断所述CSCF服务器是否支持所述目标标识；
    在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
  3. 根据权利要求1或2所述的语音电话回落的方法，其特征在于，
    所述资源状态查询的内容至少包括以下之一：
    当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
    所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
  4. 一种CSCF服务器，其特征在于，包括：
    第一接收模块，用于接收来自移动终端的发起VoLTE语音业务的协议信令；
    确定模块，用于根据所述协议信令确定是否向所述移动终端的移动管理实体发送业务查询指令；
    所述第一接收模块还用于：接收来自所述移动管理实体的查询结果；
    第一发送模块，用于根据所述查询结果向所述移动终端发送语音电话回落命令，以使所述移动终端执行语音电话回落操作；其中，
    所述协议信令中包括用于标记所述移动终端支持所述协议信令下的所述语音电话回落操作的目标标识，所述查询指令用于使所述移动管理实体进行资源状态查询。
  5. 根据权利要求4所述的CSCF服务器，其特征在于，
    所述确定模块具体用于：判断所述CSCF服务器是否支持所述目标标识；
    所述第一发送模块还用于：在判断结果为是时，向所述移动管理实体发送所述业务查询指令。
  6. 根据权利要求4或5所述的CSCF服务器，其特征在于，
    所述资源状态查询的内容至少包括以下之一：
    当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
    所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
  7. 一种语音电话回落的方法，用于移动终端，其特征在于，包括：
    在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；
    将所述协议信令发送至CSCF服务器；
    接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
  8. 一种移动终端，其特征在于，包括：
    标记模块，用于在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；
    第二发送模块，用于将所述协议信令发送至CSCF服务器；
    第二接收模块，用于接收来自所述CSCF服务器的语音电话回落命令，以执行语音电话回落操作，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络。
  9. 一种语音电话回落的方法，用于移动管理实体，其特征在于，包括：
    接收来自CSCF服务器的业务查询指令；
    根据所述业务查询指令进行资源状态查询；
    将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
  10. 根据权利要求9所述的语音电话回落的方法，其特征在于，所述资源状态查询的内容至少包括以下之一：
    当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
    所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
  11. 一种移动管理实体，其特征在于，包括：
    第三接收模块，用于接收来自CSCF服务器的业务查询指令；
    查询模块，用于根据所述业务查询指令进行资源状态查询；
    第三发送模块，将查询结果发送至所述CSCF服务器，以确定所述移动终端是否执行语音电话回落操作。
  12. 根据权利要求11所述的移动管理实体，其特征在于，所述资源状态查询的内容至少包括以下之一：
    当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
    所述查询结果中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
  13. 一种语音电话回落的系统，其特征在于，包括CSCF服务器、移动终端和移动管理实体，其中：
    所述移动终端在协议信令中添加目标标识，所述目标标识用于标记所述移动终端支持协议信令下的所述语音电话回落操作；
    所述移动终端将所述协议信令发送至所述CSCF服务器；
    所述CSCF服务器根据所述协议信令确定向所述移动终端的移动管理实体发送业务查询指令；
    所述移动管理实体根据所述业务查询指令进行资源状态查询；
    所述移动管理实体将查询结果发送至所述CSCF服务器；
    所述CSCF服务器根据所述查询结果向所述移动终端发送语音电话回落命令，其中，所述语音电话回落命令中包括所述语音电话回落操作的目标网络；
    所述移动终端执行语音电话回落操作。
  14. 根据权利要求13所述的系统，其特征在于，所述CSCF服务器根据所述协议信令确定向所述移动终端的移动管理实体发送业务查询指令，包括：
    所述CSCF服务器判断所述CSCF服务器是否支持所述目标标识；
    在判断结果为是时，所述CSCF服务器向所述移动管理实体发送所述业务查询指令。
  15. 根据权利要求13或14所述的系统，其特征在于，
    所述资源状态查询的内容至少包括以下之一：
    当前网络部署状态、所述移动终端的VoLTE语音业务状态、所述移动终端归属的基站的负载状态和其他网络资源状态；以及
    所述查询结果和所述语音电话回落命令中包括所述语音电话回落操作的目标网络，以使所述移动终端根据所述目标网络执行所述语音电话回落操作。
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