WO2016091136A1 - 语音切换的方法和装置 - Google Patents

语音切换的方法和装置 Download PDF

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Publication number
WO2016091136A1
WO2016091136A1 PCT/CN2015/096560 CN2015096560W WO2016091136A1 WO 2016091136 A1 WO2016091136 A1 WO 2016091136A1 CN 2015096560 W CN2015096560 W CN 2015096560W WO 2016091136 A1 WO2016091136 A1 WO 2016091136A1
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Prior art keywords
terminal
voice switching
voice
notification message
communication network
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PCT/CN2015/096560
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English (en)
French (fr)
Inventor
郑顺利
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华为技术有限公司
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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 KR1020177018002A priority Critical patent/KR101903686B1/ko
Priority to JP2017548517A priority patent/JP6604386B2/ja
Priority to EP21170017.4A priority patent/EP3930379B1/en
Priority to EP15867135.4A priority patent/EP3223558B1/en
Publication of WO2016091136A1 publication Critical patent/WO2016091136A1/zh
Priority to US15/616,691 priority patent/US10506485B2/en
Priority to US16/688,643 priority patent/US11240721B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • 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
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for voice switching.
  • the terminal In the process of switching a voice call under a 4G network to a 2G or 3G network, the terminal detects the channel quality of the channel in use and the surrounding neighboring cell, and transmits the channel quality to the source base station, and the source base station passes the channel quality of each channel.
  • the target MSC performs voice switching processing, that is, the target MSC sends a resource allocation request to the corresponding target base station, and when the target base station receives the resource allocation request, the target base station starts to prepare for the handover.
  • the notification message of the resource preparation is sent to the target MSC, and the target MSC sends a handover command carrying the terminal identifier to the IMS (Internet Protocol Multimedia Subsystem), and the IMS queries the terminal. Whether the voice capability information is related to the current call The status information is matched. If it matches, the IMS performs a voice switching procedure. At the same time, the target MSC notifies the terminal to handover to the target base station. If not, the target MSC sends a notification message of the handover failure to the source base station.
  • IMS Internet Protocol Multimedia Subsystem
  • the target MSC After the voice call is switched to the 2G or 3G network in the above manner, after the source MME sends a voice switch request to the target MSC, the target MSC needs to notify the target base station to prepare the corresponding resources, and prepare the resources before starting.
  • the IMS initiates a voice switching process.
  • the target base station When the IMS determines that the voice capability information does not match the current call state information, the target base station has reserved the resources prepared for the handover for a long time (up to 15 seconds), thereby causing A waste of resources.
  • a method for voice switching comprising:
  • the first communication network is a preset communication network
  • the query request of the capability where the query request carries the terminal identifier;
  • the notification message of the capability sends a notification message of the handover failure to the source MME.
  • the notification message with the voice switching capability carries current call state information
  • the notification message with the voice switching capability sent by the IMS is received, determining, according to the locally stored correspondence between the call state information of the terminal and the voice switching capability, and the current call state information, determining the terminal Whether the voice switching capability is available in the current call state, and if yes, performing voice switching processing according to the target base station identifier and the terminal identifier;
  • the method further includes:
  • the terminal does not have the voice switching capability in the current call state, according to the locally stored correspondence between the call state information of the terminal and the voice switching capability, and the current call state information, sending, to the source MME, the source MME Switch the failed notification message.
  • the receiving, by the IMS, the notification message with the voice switching capability, according to the target base station identifier and the terminal identifier , for voice switching processing including:
  • the resource occupancy rate of the target base station corresponding to the target base station identifier is obtained, and if the resource occupancy rate is less than a preset resource occupancy threshold, Performing voice switching processing according to the target base station identifier and the terminal identifier.
  • the receiving, by the IMS, the notification message with the voice switching capability, according to the target base station identifier and the terminal identifier After performing the voice switching process, the method further includes:
  • the notification message with voice switching capability carries current call state information
  • the method further includes:
  • the notification message of the voice handover failure is sent to the source MME.
  • a device for voice switching comprising:
  • a receiving module configured to receive a voice switching request sent by the source mobility management entity MME, where the first communication network currently used by the terminal to be switched, the terminal identifier of the terminal, and the target base station identifier are received;
  • a sending module configured to send, to the network interconnection protocol multimedia subsystem IMS, a second, if the first communication network is a preset communication network, to query whether the terminal currently has a second use by the first communication network to be used locally
  • the query request of the voice switching capability of the communication network where the query request carries the terminal identifier
  • a processing module configured to perform voice switching processing according to the target base station identifier and the terminal identifier, if the notification message with the voice switching capability sent by the IMS is received, and if not received by the IMS
  • the notification message with the voice switching capability sends a notification message of the handover failure to the source MME.
  • the notification message with the voice switching capability carries current call state information
  • the processing module is configured to:
  • the notification message with the voice switching capability sent by the IMS is received, determining, according to the locally stored correspondence between the call state information of the terminal and the voice switching capability, and the current call state information, determining the terminal Whether the voice switching capability is available in the current call state, and if yes, performing voice switching processing according to the target base station identifier and the terminal identifier;
  • the sending module is configured to:
  • the terminal does not have the voice switching capability in the current call state, according to the locally stored correspondence between the call state information of the terminal and the voice switching capability, and the current call state information, sending, to the source MME, the source MME Switch the failed notification message.
  • the processing module is configured to:
  • the resource occupancy rate of the target base station corresponding to the target base station identifier is obtained, and if the resource occupancy rate is less than a preset resource occupancy threshold, Performing voice switching processing according to the target base station identifier and the terminal identifier.
  • the apparatus further includes a canceling module, configured to:
  • the notification message with voice switching capability carries current call state information
  • the processing module is configured to:
  • the sending module is configured to:
  • the notification message of the voice handover failure is sent to the source MME.
  • the voice switching request of the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal that is to be switched is sent by the source mobility management entity MME, if the first communication network is a preset communication
  • the network sends a query request to the network interconnection protocol multimedia subsystem IMS for querying whether the terminal currently has the voice switching capability of the second communication network used by the first communication network to the local.
  • the query request carries the terminal identifier, if received If the notification message with the voice switching capability is sent to the IMS, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • the notification message that does not have the voice switching capability sent by the IMS is received, the notification of the handover failure is sent to the source MME.
  • the message in this way, can determine whether the terminal has the corresponding voice switching capability before preparing the resource for the terminal to perform voice switching. Only after determining that the terminal has the corresponding voice switching capability, the corresponding resource is prepared for the terminal, thereby reducing the number of resources. Waste of resources.
  • FIG. 1 is a flowchart of a method for voice switching according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for canceling voice switching according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an apparatus for voice switching according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an MSC according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for voice switching. As shown in FIG. 1 , the processing procedure of the method may include the following steps:
  • Step 101 Receive a voice switching request sent by the source mobility management entity MME that carries the first communication network currently used by the terminal to be switched, the terminal identifier of the terminal, and the target base station identifier.
  • Step 102 If the first communication network is a preset communication network, send a query to the Internet Protocol Protocol Multimedia Subsystem IMS for querying whether the terminal currently has a voice switching capability of the second communication network used by the first communication network to the local communication network.
  • the request, the query request carries the terminal identifier.
  • Step 103 If receiving the notification message with the voice switching capability sent by the IMS, performing voice switching processing according to the target base station identifier and the terminal identifier; if receiving the notification message that the IMS does not have the voice switching capability, the source MME is sent to the source MME. Send a notification message that the switch failed.
  • the voice switching request of the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal that is to be switched is sent by the source mobility management entity MME, if the first communication network is a preset communication
  • the network sends to the Internet Protocol Protocol Multimedia Subsystem IMS to query whether the terminal currently has a first communication network to use locally.
  • the query request of the voice switching capability of the second communication network carries the terminal identifier, and if the notification message with the voice switching capability sent by the IMS is received, the voice switching process is performed according to the target base station identifier and the terminal identifier; Receiving the notification message that the IMS does not have the voice switching capability, and sending the notification message of the handover failure to the source MME, so that the terminal can determine whether the terminal has the corresponding voice switching capability before preparing the resource for the terminal to perform voice switching. After determining that the terminal has the corresponding voice switching capability, the corresponding resources are prepared for the terminal, thereby reducing resource waste.
  • the embodiment of the invention provides a method for voice switching, and the execution subject of the method is a target MSC.
  • the target MSC may be composed of a communication network device (such as a server), or may be composed of two communication network devices having different functions.
  • a target MSC composed of one communication network device is taken as an example. The detailed description is similar to the other cases, and will not be described here.
  • Step 101 Receive a voice switching request sent by the source mobility management entity MME that carries the first communication network currently used by the terminal to be switched, the terminal identifier of the terminal, and the target base station identifier.
  • the communication network may include multiple types, such as a 2G network, a 3G network, and a 4G network.
  • the first communication network may be one of the foregoing multiple communication networks, and the terminal may have any terminal with a wireless communication function, such as a mobile phone.
  • the terminal identifier may be an IMEI (International Mobile Equipment Identity) of the terminal, or may be a communication number (such as a mobile phone number) of the terminal, and the base station identifier may be a number or a name of the base station.
  • IMEI International Mobile Equipment Identity
  • the user can input the terminal identifier of another terminal that needs to make a voice call, such as a mobile phone number, in the terminal used by the user.
  • a voice call such as a mobile phone number
  • the user can click the dial button, and the terminal obtains the terminal identifier input by the user and the user.
  • the terminal identifier generates a voice communication request, and sends the voice communication request to the base station to which the terminal belongs (ie, the source base station), and the source base station can send the voice communication request to the EPC (Evolved Packet Core) to which it belongs, thereby The voice communication request is sent to the IMS.
  • EPC Evolved Packet Core
  • the IMS may extract the terminal identifier input by the user in the voice communication request, query the identifier of other devices in the core network corresponding to the terminal identifier, and receive the received voice communication.
  • the request is sent to the device corresponding to the identifier that is queried in the above manner, and the voice communication request is sequentially forwarded until the other terminal receives the voice communication request, thereby establishing voice communication between the terminal and another terminal.
  • the terminal to be switched may measure the channel quality of the neighbor channel of the terminal in some manner, detect the channel quality of the communication network currently used by the terminal, and generate a measurement message by using the related information of the neighbor channel, and send the measurement message to the source.
  • the base station if the source base station determines that the channel quality of the first communication network currently used by the terminal is smaller than a preset first channel quality threshold, the source base station may analyze related information of the received neighbor channel, and select a channel quality from which the channel quality is greater than
  • the neighboring channel of the second channel quality threshold acquires related information of the neighboring channel, such as related information of the cell where the neighboring channel is located, such as a cell identifier, etc., the source base station may use related information of the neighboring channel and a terminal identifier of the terminal, Generating a voice switching request and sending it to the MME to which it belongs (ie, the source MME), the source MME may obtain the corresponding MSC identifier (ie, the destination MSC identifier)
  • MSC may be composed of two parts, such as an MSC server and an MSC processing device.
  • the process and manner of processing the data may refer to the existing processing and processing methods. This will not be repeated here.
  • Step 102 If the first communication network is a preset communication network, send a query to the Internet Protocol Protocol Multimedia Subsystem IMS for querying whether the terminal currently has a voice switching capability of the second communication network used by the first communication network to the local communication network.
  • the request, the query request carries the terminal identifier.
  • the first communication network may be different from the second communication network.
  • the first communication network may be a 4G network
  • the second communication network may be any communication network other than the 4G network, for example, a 2G network
  • the voice switching capability may include Voice switching before ringing, voice switching in ringing, and voice switching for multi-way calls.
  • the preset communication network may be a 4G network
  • the target MSC receives the voice switch.
  • extracting information of the first communication network such as the network identifier of the first communication network or the information of the communication protocol used by the first communication network, by using the information, determining the network type to which the first communication network belongs, and then determining the network type to which the first communication network belongs, and then The first communication network can be compared with the preset communication network (which can be a 4G network). If the first communication network is not a 4G network, the target MSC can perform corresponding processing through the existing voice switching processing flow, if the first The communication network is a 4G network, and the second communication network used by the target MSC is a 2G network.
  • the target MSC can determine whether the terminal to be switched currently has voice switching capability from the 4G network to the 2G network. Specifically, the target MSC can pass the IMS to the IMS.
  • the method of querying determines whether the terminal has the voice switching capability, that is, the target MSC sends a query request to the IMS to which the terminal belongs, wherein the query request is used to query whether the terminal currently has a voice of the 2G network used by the 4G network to the local device. Switching ability.
  • Step 103 If receiving the notification message with the voice switching capability sent by the IMS, performing voice switching processing according to the target base station identifier and the terminal identifier; if receiving the notification message that the IMS does not have the voice switching capability, the source MME is sent to the source MME. Send a notification message that the switch failed.
  • the first terminal when the first terminal (which may be any terminal) sends a voice communication request to the second terminal (other terminals than the first terminal), the first terminal will pass the voice switching capability of the first terminal to the source base station.
  • the EPC is sent to the IMS, and the IMS can store the terminal identifier of the first terminal in association with the voice switching capability of the first terminal.
  • the IMS receives the query request, the IMS can query the terminal identifier carried in the request.
  • the corresponding voice switching capability is determined, and the IMS can store the current call state information of the terminal, for example, before ringing, ringing, or multi-way call, and the IMS can query the terminal identifier carried in the request.
  • the IMS can match the current call state information with the voice switching capability of the terminal. If the current call state information matches the voice switching capability of the terminal, The notification message with voice switching capability may be sent to the target MSC, and after receiving the notification message, the target MSC may The target base station identifier and the terminal identifier perform voice switching processing, that is, the target MSC may send a resource allocation request to the target base station, and when the target base station receives the resource allocation request, the target base station may prepare corresponding resources for the voice switching, and after the preparation is completed, the target is completed.
  • the MSC sends a notification message that the resource preparation is completed, and the target MSC sends a voice switching instruction carrying the terminal identifier to the IMS, and the IMS performs voice cut.
  • the program is changed, and the target MSC notifies the target base station to perform voice switching, thereby completing the voice switching process.
  • the notification message that does not have the voice switching capability may be sent to the target MSC.
  • the target MSC may send a notification message of the handover failure to the source MME.
  • the source MME may send the notification message of the handover failure to the source base station. If the source base station determines that the voice handover needs to be performed again at a certain moment, the foregoing process may be repeated to complete the process from the first communication network to the second communication network. Voice switching.
  • the processing manner of the foregoing step 103 may be various.
  • the following provides an optional processing manner, which may include the following: the notification message with the voice switching capability carries the current call state information, and if the IMS is received, And sending the notification message with the voice switching capability, according to the locally stored correspondence between the call state information of the terminal and the voice switching capability, and the current call state information, determining whether the terminal has voice switching capability in the current call state. If yes, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • a terminal may have multiple voice switching capabilities. However, in the process of actual voice switching, the success rate of voice switching may be lower, and the target MSC may record a terminal with a lower voice switching success rate.
  • the terminal identifier may be stored in the target MSC in a corresponding manner, such as establishing a correspondence between the call state information of the terminal and the voice switching capability.
  • the target MSC may store the terminal identifiers of the multiple terminals and the voice switching capability of the terminal corresponding thereto, so that the target MSC may first process the voice switching process of the terminal by using the locally stored voice switching capability.
  • the IMS may determine, by using the foregoing processing manner, that the terminal to be switched has a voice switching capability, and the IMS may carry the voice switching capability of the current call state information corresponding to the terminal.
  • the notification message is sent to the target MSC, and the target MSC can extract the current call state information, and find the current call state information and the terminal identifier of the terminal in the corresponding relationship to determine whether the terminal to be switched is in the current call state.
  • the voice switching capability is performed. If yes, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • the call state information and voice switching capability of the terminal stored locally are The corresponding relationship, and the current call state information, determines that the terminal does not have the voice switching capability in the current call state, and sends a notification message of the handover failure to the source MME.
  • the target MSC may send a notification message of the handover failure to the source MME.
  • the source MME may send a notification message of the handover failure to the source base station. If the source base station determines that the voice handover needs to be performed again at a certain time, the foregoing process may be repeated to complete the first communication network to the second communication network. Voice switching.
  • the processing manner of the voice switching processing in the foregoing step 103 may be various.
  • the following may also provide an optional processing manner, which may specifically include the following: if receiving the voice switching capability sent by the IMS The notification message is used to obtain the resource occupancy rate of the target base station corresponding to the target base station identifier. If the resource occupancy rate is less than the preset resource occupancy threshold, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • the resource usage of different base stations may be different at different times. If the resource occupancy rate of a certain base station is high at a certain time, the burden of the base station is increased after the voice switching is performed, and thus the voice call quality is degraded.
  • the specific processing may be: when the IMS receives the query request, the IMS may determine that the terminal to be switched has the voice switching capability, and the IMS may send the notification message with the voice switching capability to the target MSC.
  • the target MSC may extract the target base station identifier carried in the voice handover request, and the target MSC may store related information of multiple base stations, such as the resource occupancy rate of the base station, etc., and then the target MSC may be in the storage.
  • the resource occupancy rate of the base station is searched for, and the resource occupancy rate of the target base station corresponding to the target base station identifier is obtained, and the resource occupancy rate is compared with the preset resource occupancy threshold. If the resource occupancy rate is smaller than the resource usage.
  • the rate threshold can be based on the target base station identifier and the terminal identifier. Voice switching process, particularly the above process may refer to the content, which is not repeated herein.
  • the processing manner of performing the voice switching processing in the foregoing step 103 may be various.
  • the following may also provide an optional processing manner, which may include the following content: the notification message with the voice switching capability carries the current Call status information, if receiving a notification message with voice switching capability sent by the IMS, and the local support terminal switches from the first communication network to the second communication network in the call state corresponding to the current call state information, according to the target
  • the base station identifier and the terminal identifier perform voice switching processing.
  • the IMS, the target MSC, the target LAI (Location Area Identity), the target RNC (Radio Network Controller), and/or the target BSC (Base Station Controller) may be The terminal does not support the voice switching. Therefore, when the IMS receives the query request, the IMS can determine that the terminal to be switched has the voice switching capability, and the IMS can carry the voice switching capability with the current call state information.
  • the notification message is sent to the target MSC. For the specific processing, refer to the related content. After receiving the notification message, the target MSC can determine whether the target MSC and the target LAI support the terminal in the call state corresponding to the current call state information.
  • Voice switching from the first communication network to the second communication network that is, voice switching from the 4G network to the 2G network. If supported, the voice switching processing is performed according to the target base station identifier and the terminal identifier. For the specific processing, refer to the related content. , will not repeat them here.
  • the notification message of the voice handover failure is sent to the source MME.
  • the target MSC may send the voice handover failure to the source MME.
  • the notification message at this time, the source MME may send the notification message of the handover failure to the source base station. If the source base station determines that the voice handover needs to be performed again at a certain moment, the foregoing process may be repeated to complete the second communication network to the second. Voice switching of the communication network.
  • the prepared resources of the target base station may be released.
  • the specific processing may include the following: if receiving the notification message of the voice handover failure sent by the IMS, identifying the target to the target base station The base station sends a resource release request, suspending the network resource of the first communication network currently used by the terminal, and the current call state of the terminal.
  • the notification message of canceling the voice handover sent by the source MME canceling the terminal by the first communication network Voice switching to the second communication network.
  • the target MSC may send a resource allocation request to the target base station, and when the target base station receives the resource allocation request, the target base station may prepare for the voice handover.
  • the corresponding resources are ready to be completed
  • the target MSC sends a voice switching instruction carrying the terminal identifier to the IMS, the IMS performs a voice switching procedure, and the target MSC notifies the target base station to perform voice switching, if in the foregoing process, For some reasons, the voice switching fails, for example, the communication network is disconnected.
  • the IMS may send a notification message of the voice handover failure to the target MSC.
  • the target MSC may send the resource to the target base station corresponding to the target base station identifier.
  • the release request the target base station may release the corresponding resource.
  • the source base station may reserve the network resource of the first communication network currently used by the terminal to be switched and the current call state of the terminal, when the terminal cannot access the target channel, The original channel may be returned by using the reserved network resource, or the source base station initiates service re-establishment, re-establishes a channel, and provides the channel for use by the terminal, or initiates service re-establishment through other base stations except the source base station in the first communication network.
  • the source eNB may send the notification message to the source MME, and the source MME may forward the notification message to the target MSC, and after receiving the notification message, the target MSC may Deactivating the voice switching of the terminal from the first communication network to the second communication network. If the terminal does not return to the original channel within a preset duration, the target MSC may cancel the terminal from the first communication network to the second communication network.
  • the source MME can release the corresponding 4G network resources. The foregoing process may be that after the source MME receives the notification message, the source MME may wait for the source base station to perform detection or the terminal voluntarily abandons the voice handover, and then the source MME may release the corresponding 4G network resource.
  • the process of matching the current call state information with the voice switching capability of the terminal may be performed by the target MSC.
  • the target MSC may be configured. Sending, to the IMS, a query request for querying whether the terminal currently has a voice switching capability of the second communication network used by the first communication network to the local use, where the query request carries the terminal identifier, and the IMS can forward the current call state information and the terminal.
  • the information such as the voice switching capability is sent to the target MSC, and the target MSC can match the current call state information with the voice switching capability of the terminal, and then determine whether the current call state information matches the voice switching capability of the terminal to complete the follow-up.
  • the first communication network, the terminal identifier of the terminal, and the voice of the target base station identifier currently used by the terminal carrying the terminal to be switched, which is sent by the source mobile management entity MME, is received.
  • Switching request if the first communication network is a preset communication network, sending a query to the Internet Protocol Multimedia Subsystem IMS for querying whether the terminal currently has a voice switching capability of the second communication network used by the first communication network to the local communication network
  • the request, the query request carries the terminal identifier, and if the notification message with the voice switching capability sent by the IMS is received, the voice switching process is performed according to the target base station identifier and the terminal identifier; if the IMS sends the voice switching capability without the voice switching capability And the notification message is sent to the source MME, and the notification message of the handover failure is sent to the source MME, so that the terminal can determine whether the terminal has the corresponding voice switching capability before the terminal performs voice switching preparation, and only after determining that the terminal has
  • Step 201 The source MME sends a voice switching request to the target MSC.
  • Step 202 The target MSC sends a voice handover request to the target base station.
  • Step 203 The target base station sends a voice handover confirmation to the target MSC.
  • Step 204 The IMS sends a notification message of the voice switching response to the target MSC.
  • Step 205 The target MSC sends a voice switching instruction to the IMS.
  • step 206 the IMS performs a voice switching procedure.
  • Step 207 The target MSC sends a voice switching response to the source MME.
  • Step 208 The target MSC sends a resource release request to the target base station.
  • Step 209 The source MME sends a notification message for canceling the voice handover to the target MSC.
  • Step 210 The target MSC cancels the voice handover of the terminal from the first communication network to the second communication network.
  • the voice switching request of the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal that is to be switched is sent by the source mobility management entity MME, if the first communication network is a preset communication
  • the network sends a query request to the network interconnection protocol multimedia subsystem IMS for querying whether the terminal currently has the voice switching capability of the second communication network used by the first communication network to the local communication, and the query request carries the terminal identifier
  • the notification message with the voice switching capability sent by the IMS is received, the voice switching process is performed according to the target base station identifier and the terminal identifier; if the notification message without the voice switching capability sent by the IMS is received, the message is sent to the source MME.
  • the failure notification message is switched, so that the terminal can determine whether the terminal has the corresponding voice switching capability before preparing the resource for the terminal to perform voice switching. Only after determining that the terminal has the corresponding voice switching capability, the terminal prepares the corresponding resource for the terminal. Thereby, resource waste can be reduced.
  • the embodiment of the present invention further provides a device for voice switching.
  • the device includes:
  • the receiving module 310 is configured to receive, by the source mobility management entity MME, a voice switching request that is used by the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal to be switched;
  • the sending module 320 is configured to send, to the network interconnection protocol multimedia subsystem IMS, a voice switch for querying whether the terminal currently has a second communication network used by the first communication network to the local communication network if the first communication network is a preset communication network.
  • the capability query request, the query request carries the terminal identifier;
  • the processing module 330 is configured to perform voice switching processing according to the target base station identifier and the terminal identifier if receiving the notification message with the voice switching capability sent by the IMS, and if receiving the notification message that the IMS does not have the voice switching capability, A notification message of handover failure is sent to the source MME.
  • the notification message with voice switching capability carries current call state information
  • the processing module 330 is configured to:
  • the terminal determines whether the terminal has the voice switching capability in the current call state according to the correspondence between the call state information of the locally stored terminal and the voice switching capability, and the current call state information. If yes, performing voice switching processing according to the target base station identifier and the terminal identifier;
  • the sending module 320 is configured to:
  • the capability sends a notification message of the handover failure to the source MME.
  • processing module 330 is configured to:
  • the resource occupancy rate of the target base station corresponding to the target base station identifier is obtained. If the resource occupancy rate is less than the preset resource occupancy threshold, the target base station identifier and the terminal identifier are used according to the target base station identifier. Perform voice switching processing.
  • the apparatus further includes a cancel module for:
  • the notification message of the voice handover failure sent by the IMS If the notification message of the voice handover failure sent by the IMS is received, sending a resource release request to the target base station corresponding to the target base station identifier, suspending the network resource of the first communication network currently used by the terminal, and the current call state of the terminal, when receiving When the notification message of canceling the voice switching sent by the source MME is sent, the voice switching of the terminal from the first communication network to the second communication network is cancelled.
  • the notification message with voice switching capability carries current call state information
  • the processing module 330 is configured to:
  • the local support terminal switches from the first communication network to the second communication network in the call state corresponding to the current call state information, according to the target base station identifier and the terminal identifier , performing voice switching processing;
  • the sending module 320 is configured to:
  • the notification message of the voice handover failure is sent to the source MME.
  • the voice switching request of the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal that is to be switched is sent by the source mobility management entity MME, if the first communication network is a preset communication
  • the network sends a query request to the network interconnection protocol multimedia subsystem IMS for querying whether the terminal currently has the voice switching capability of the second communication network used by the first communication network to the local.
  • the query request carries the terminal identifier, if received If the notification message with the voice switching capability is sent to the IMS, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • the notification message that does not have the voice switching capability sent by the IMS is received, the notification of the handover failure is sent to the source MME.
  • the message in this way, can determine whether the terminal has the corresponding voice switching capability before preparing the resource for the terminal to perform voice switching. Only after determining that the terminal has the corresponding voice switching capability, the corresponding resource is prepared for the terminal, thereby reducing the number of resources. Waste of resources.
  • the device for voice switching provided by the foregoing embodiment is only illustrated by the division of the foregoing functional modules. In actual applications, the function distribution may be completed by different functional modules as needed. The internal structure of the MSC is divided into different functional modules to complete all or part of the functions described above.
  • the device for the voice switching provided by the foregoing embodiment is the same as the method for the voice switching, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.
  • FIG. 4 is a schematic structural diagram of an MSC according to an embodiment of the present invention.
  • the MSC can be used to implement the method for voice switching provided in the foregoing embodiment. Specifically:
  • the MSC 1100 may vary considerably depending on configuration or performance, and may include one or more central processing units (CPUs) 1122 (eg, one or more processors) and memory 1132, one or more A storage medium 1130 storing storage application 1142 or data 1144 (eg, one or one storage device in Shanghai).
  • the memory 1132 and the storage medium 1130 may be short-term storage or persistent storage.
  • the program stored on storage medium 1130 may include one or more modules (not shown), each of which may include a series of instruction operations in the MSC.
  • the central processor 1122 can be configured to communicate with the storage medium 1130 to perform a series of instruction operations in the storage medium 1130 on the MSC 1100.
  • the MSC 1100 may also include one or more power sources 1126, one or more wired or wireless network interfaces 1150, one or more input and output interfaces 1158, one or more keyboards 1156, and/or one or more operating systems 1141 For example, Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.
  • the MSC includes a memory, and one or more programs, wherein one or more programs are stored in the memory, and one or more programs may include one or more modules, and each module may Included with a series of instruction operations in a server, and configured to be executed by one or more processors.
  • the one or more programs include instructions for:
  • the network interconnection protocol multimedia subsystem sends a query request for querying whether the terminal currently has a voice switching capability of the second communication network used by the first communication network to the local device, where the query request carries the terminal identifier;
  • the voice switching process is performed according to the target base station identifier and the terminal identifier; if the notification message without the voice switching capability sent by the IMS is received, the handover failure is sent to the source MME. Notification message.
  • the notification message with voice switching capability carries current call state information
  • the voice switching process is performed according to the target base station identifier and the terminal identifier, including:
  • the terminal determines whether the terminal has the voice switching capability in the current call state according to the correspondence between the call state information of the locally stored terminal and the voice switching capability, and the current call state information. If yes, performing voice switching processing according to the target base station identifier and the terminal identifier;
  • the method also includes:
  • the notification message of the handover failure is sent to the source MME.
  • the voice switching process is performed according to the target base station identifier and the terminal identifier, including:
  • the resource occupancy rate of the target base station corresponding to the target base station identifier is obtained. If the resource occupancy rate is less than the preset resource occupancy threshold, the target base station identifier and the terminal identifier are used according to the target base station identifier. Perform voice switching processing.
  • the method further includes:
  • the notification message of the voice handover failure sent by the IMS If the notification message of the voice handover failure sent by the IMS is received, sending a resource release request to the target base station corresponding to the target base station identifier, suspending the network resource of the first communication network currently used by the terminal, and the current call state of the terminal, when receiving When the notification message of canceling the voice switching sent by the source MME is sent, the voice switching of the terminal from the first communication network to the second communication network is cancelled.
  • the notification message with voice switching capability carries current call state information
  • the voice switching process is performed according to the target base station identifier and the terminal identifier, including:
  • the local support terminal switches from the first communication network to the second communication network in the call state corresponding to the current call state information, according to the target base station identifier and the terminal identifier , performing voice switching processing;
  • the method also includes:
  • the notification message of the voice handover failure is sent to the source MME.
  • the voice switching request of the first communication network, the terminal identifier of the terminal, and the target base station identifier currently used by the terminal that is to be switched is sent by the source mobility management entity MME, if the first communication network is a preset communication
  • the network sends a query request to the network interconnection protocol multimedia subsystem IMS for querying whether the terminal currently has the voice switching capability of the second communication network used by the first communication network to the local.
  • the query request carries the terminal identifier, if received If the notification message with the voice switching capability is sent to the IMS, the voice switching process is performed according to the target base station identifier and the terminal identifier.
  • the notification message that does not have the voice switching capability sent by the IMS is received, the notification of the handover failure is sent to the source MME.
  • the message in this way, can determine whether the terminal has the corresponding voice switching capability before preparing the resource for the terminal to perform voice switching. Only after determining that the terminal has the corresponding voice switching capability, the corresponding resource is prepared for the terminal, thereby reducing the number of resources. Waste of resources.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明实施例公开了一种语音切换的方法和装置，属于通信技术领域。所述方法包括：接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息。采用本发明，可以减少资源浪费。

Description

语音切换的方法和装置
本申请要求于2014年12月08日提交中国专利局、申请号为201410745218.X、发明名称为“语音切换的方法和装置”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
本发明涉及通信技术领域，特别涉及一种语音切换的方法和装置。
背景技术
随着通信技术的不断发展，尤其是无线通信技术，已经由最初的第一代移动通信技术(即1G)、第二代移动通信技术(即2G)发展到现在的第三代移动通信技术(即3G)和第四代移动通信技术(即4G)，由于第四代移动通信技术还处于调试、试用阶段，因此，4G网络的覆盖范围较小，在使用4G网络进行通话时，如果使用的4G网络较差，可以将4G网络下的语音通话切换到2G或3G网络。
在将4G网络下的语音通话切换到2G或3G网络的过程中，终端检测其正在使用的信道和周围的邻居小区内信道的信道质量，并发送给源基站，源基站通过各信道的信道质量，选择一个信道，获取该信道的无线标识，向源MME(Mobility Management Entity，移动管理实体)发送携带有该无线标识的切换请求，源MME向对应的目标MSC(Mobile Switching Center，移动交换中心)发送语音切换请求，目标MSC接收到语音切换请求后，进行语音切换处理，即目标MSC向对应的目标基站发送资源分配请求，目标基站接收到资源分配请求时，目标基站开始为本次切换准备相应的资源，准备完成后，向目标MSC发送资源准备完毕的通知消息，目标MSC向IMS(Internet Protocol Multimedia Subsystem，网络互联协议多媒体子系统)发送携带有终端标识的切换指令，IMS查询终端所具有的语音能力信息是否与当前呼叫状态信息匹配，如果匹配，IMS执行语音切换程序，同时，目标MSC通知终端切换到目标基站，如果不匹配，则目标MSC向源基站发送切换失败的通知消息。
在实现本发明的过程中，发明人发现现有技术至少存在以下问题：
通过上述方式将4G网络下的语音通话切换到2G或3G网络的过程中，源MME向目标MSC发送语音切换请求后，目标MSC需要通知目标基站准备相应的资源，准备好资源后，才开始由IMS发起语音切换的流程，当IMS确定所具有的语音能力信息与当前呼叫状态信息不匹配时，目标基站已经为本次切换准备的资源保留了很长时间(可达到15秒)，从而，造成了资源的浪费。
发明内容
为了解决现有技术的问题，本发明实施例提供了一种语音切换的方法和装置。所述技术方案如下：
第一方面，提供了一种语音切换的方法，所述方法包括：
接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、所述终端的终端标识和目标基站标识的语音切换请求；
如果所述第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询所述终端当前是否具有由所述第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，所述查询请求中携带有所述终端标识；
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理；如果接收到所述IMS发送的不具有所述语音切换能力的通知消息，则向所述源MME发送切换失败的通知消息。
结合第一方面，在第一方面的第一种可能实现方式中，所述具有所述语音切换能力的通知消息中携带有当前呼叫状态信息；
所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
所述方法还包括：
如果根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下不具有语音切换能力，则向所述源MME发送切换失败的通知消息。
结合第一方面，在第一方面的第二种可能实现方式中，所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则获取所述目标基站标识对应的目标基站的资源占用率，如果所述资源占用率小于预设的资源占用率阈值，则根据所述目标基站标识和所述终端标识，进行语音切换处理。
结合第一方面，在第一方面的第三种可能实现方式中，所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理之后，所述方法还包括：
如果接收到所述IMS发送的语音切换失败的通知消息，则向所述目标基站标识对应的目标基站发送资源释放请求，悬置所述终端当前使用的所述第一通信网络的网络资源和所述终端当前呼叫状态，当接收到所述源MME发送的取消语音切换的通知消息时，取消所述终端由所述第一通信网络到所述第二通信网络的语音切换。
结合第一方面，在第一方面的第四种可能实现方式中，所述具有语音切换能力的通知消息中携带有当前呼叫状态信息；
所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，且本地支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
所述方法还包括：
如果本地不支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则向所述源MME发送语音切换失败的通知消息。
第二方面，提供了一种语音切换的装置，所述装置包括：
接收模块，用于接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、所述终端的终端标识和目标基站标识的语音切换请求；
发送模块，用于如果所述第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询所述终端当前是否具有由所述第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，所述查询请求中携带有所述终端标识；
处理模块，用于如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理；如果接收到所述IMS发送的不具有所述语音切换能力的通知消息，则向所述源MME发送切换失败的通知消息。
结合第二方面，在第二方面的第一种可能实现方式中，所述具有所述语音切换能力的通知消息中携带有当前呼叫状态信息；
所述处理模块，用于：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
所述发送模块，用于：
如果根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下不具有语音切换能力，则向所述源MME发送切换失败的通知消息。
结合第二方面，在第二方面的第二种可能实现方式中，所述处理模块，用于：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则获取所述目标基站标识对应的目标基站的资源占用率，如果所述资源占用率小于预设的资源占用率阈值，则根据所述目标基站标识和所述终端标识，进行语音切换处理。
结合第二方面，在第二方面的第三种可能实现方式中，所述装置还包括取消模块，用于：
如果接收到所述IMS发送的语音切换失败的通知消息，则向所述目标基站标识对应的目标基站发送资源释放请求，悬置所述终端当前使用的所述第一通信网络的网络资源和所述终端当前呼叫状态，当接收到所述源MME发送的取消语音切换的通知消息时，取消所述终端由所述第一通信网络到所述第二通信网络的语音切换。
结合第二方面，在第二方面的第四种可能实现方式中，所述具有语音切换能力的通知消息中携带有当前呼叫状态信息；
所述处理模块，用于：
如果接收到所述IMS发送的具有所述语音切换能力的通知消息，且本地支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
所述发送模块，用于：
如果本地不支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则向所述源MME发送语音切换失败的通知消息。
本发明实施例提供的技术方案带来的有益效果是：
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
附图说明
图1是本发明实施例提供的一种语音切换的方法流程图；
图2是本发明实施例提供的一种取消语音切换的方法流程图；
图3是本发明实施例提供的一种语音切换的装置结构示意图；
图4是本发明实施例提供的一种MSC的结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
实施例一
本发明实施例提供了一种语音切换的方法，如图1所示，该方法的处理流程可以包括如下的步骤：
步骤101，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求。
步骤102，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识。
步骤103，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息。
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用 的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
实施例二
本发明实施例提供了一种语音切换的方法，该方法的执行主体为目标MSC。其中，目标MSC可以是由一个通信网络设备(如服务器)组成，也可以是由两个具有不同功能的通信网络设备组成，本发明实施例中以一个通信网络设备组成的目标MSC为例进行方案的详细说明，对于其它情况与此类似，在此不再赘述。
下面将结合具体实施方式，对图1所示的处理流程进行详细的说明，内容可以如下：
步骤101，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求。
其中，通信网络可以包括多种，例如2G网络、3G网络和4G网络等，第一通信网络可以是上述多种通信网络中的一种通信网络，终端可以具有无线通信功能的任意终端，如手机等，终端标识可以是终端的IMEI(International Mobile Equipment Identity，移动设备国际身份码)，也可以是终端的通信号码(如手机号码)等，基站标识可以是基站的编号或名称等。
在实施中，用户可以在其使用的终端中输入需要进行语音通话的另一终端的终端标识，例如手机号码等，输入完成后，可以点击拨号按键，该终端获取用户输入的终端标识和自身的终端标识，生成语音通信请求，发送给该终端所属的基站(即源基站)，源基站可以将该语音通信请求发送给其所属的EPC(Evolved Packet Core，演进型分组核心网)，从而，使得 该语音通信请求发送给IMS，IMS接收到语音通信请求后，可以提取该语音通信请求中用户输入的终端标识，查询该终端标识对应的核心网中其它设备的标识，可以将接收到的语音通信请求，发送给上述查询到的标识对应的设备，通过上述方式，依次转发语音通信请求，直到另一个终端接收到该语音通信请求为止，从而，建立该终端和另一个终端之间的语音通信。
待切换的终端可以通过某些方式，测量该终端所在位置的邻居信道的信道质量，并对终端当前使用的通信网络的信道质量进行检测，使用上述邻居信道的相关信息生成测量消息，发送给源基站，如果源基站判定该终端当前使用的第一通信网络的信道质量小于预设的第一信道质量阈值，则源基站可以对接收到的邻居信道的相关信息进行分析，从中选取一个信道质量大于第二信道质量阈值的邻居信道，获取该邻居信道的相关信息，如该邻居信道所在的小区的相关信息，如小区标识等，源基站可以使用该邻居信道的相关信息和该终端的终端标识，生成语音切换请求，发送给其所属的MME(即源MME)，源MME可以从该邻居信道的相关信息中，获取相应的MSC标识(即目的MSC标识)、该终端当前使用的通信网络(即第一通信网络)和目标基站标识等，判断是否需要进行语音切换，如果需要进行语音切换，则可以将上述信息设置在上述语音切换请求中，发送给目的MSC标识对应的目标MSC。
需要说明的是，上述目的MSC可以由两部分组成，如可以由MSC服务器和MSC处理器件组成，两者对数据进行处理的过程和方式，可以参照现有的处理过程和处理方式的内容，在此不再赘述。
步骤102，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识。
其中，第一通信网络可以与第二通信网络不同，例如，第一通信网络可以为4G网络，第二通信网络可以为除4G网络外的任一个通信网络，例如2G网络，语音切换能力可以包括振铃前的语音切换、振铃中的语音切换和多路通话的语音切换等。
在实施中，预设通信网络可以是4G网络，目标MSC接收到语音切换 请求后，提取其中的第一通信网络的信息，如第一通信网络的网络标识或第一通信网络所使用的通信协议的信息等，通过该信息，判定第一通信网络所属的网络类型，然后，可以将第一通信网络与预设通信网络(可以为4G网络)进行比较，如果第一通信网络不是4G网络，则目标MSC可以通过现有的语音切换的处理流程进行相应处理，如果第一通信网络是4G网络，目标MSC使用的第二通信网络为2G网络，则目标MSC可以确定待切换的终端当前是否具有由4G网络到2G网络的语音切换能力，具体地，目标MSC可以通过向IMS查询的方式，确定该终端是否具有上述语音切换能力，即目标MSC向其所属的IMS发送查询请求，其中，该查询请求用于查询该终端当前是否具有由4G网络到本地使用的2G网络的语音切换能力。
步骤103，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息。
在实施中，第一终端(可以为任一终端)向第二终端(除第一终端外的其它终端)发送语音通信请求时，第一终端会将自身所具有的语音切换能力通过源基站、EPC等，发送给IMS，IMS可以将第一终端的终端标识与第一终端所具有的语音切换能力对应存储，当IMS接收到上述查询请求时，可以通过查询请求中携带的终端标识，在如上述的对应关系中，确定对应的语音切换能力，IMS中可以存储有终端的当前呼叫状态信息，例如，振铃前、振铃中或多路通话等，IMS可以通过查询请求中携带的终端标识，查找到当前相应的终端所处的呼叫状态信息，然后，IMS可以将当前的呼叫状态信息与终端的语音切换能力进行匹配对比，如果当前的呼叫状态信息与终端的语音切换能力相匹配，则可以向目标MSC发送具有语音切换能力的通知消息，目标MSC接收到该通知消息后，可以根据目标基站标识和终端标识，进行语音切换处理，即目标MSC可以向目标基站发送资源分配请求，目标基站接收到资源分配请求时，可以为本次语音切换准备相应的资源，准备完成后，向目标MSC发送资源准备完毕的通知消息，目标MSC向IMS发送携带有终端标识的语音切换指令，IMS执行语音切 换程序，并且目标MSC通知目标基站进行语音切换，从而，完成语音切换过程。
如果当前的呼叫状态信息与终端的语音切换能力不匹配，则可以向目标MSC发送不具有语音切换能力的通知消息，目标MSC接收到该通知消息后，可以向源MME发送切换失败的通知消息，此时，源MME可以将切换失败的通知消息发送给源基站，如果某时刻，源基站再次判定需要进行语音切换时，则可以重复上述过程，以完成由第一通信网络到第二通信网络的语音切换。
可选地，上述步骤103的处理方式可以多种多样，以下提供一种可选的处理方式，具体可以包括以下内容：具有语音切换能力的通知消息中携带有当前呼叫状态信息，如果接收到IMS发送的具有所述语音切换能力的通知消息，则根据本地存储的该终端的呼叫状态信息与语音切换能力的对应关系，以及当前呼叫状态信息，确定该终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据目标基站标识和终端标识，进行语音切换处理。
在实施中，某终端可以具有多个语音切换能力，但是，在实际语音切换的过程中，进行语音切换的成功率可能会较低，目标MSC中可以记录有进行语音切换成功率较低的终端的终端标识，具体可以对应关系的方式存储在目标MSC中，如建立终端的呼叫状态信息与语音切换能力的对应关系等。目标MSC中可以存储有多个终端的终端标识和与其相对应的终端所具有的语音切换能力，这样，目标MSC可以先通过本地存储的语音切换能力，对上述终端的语音切换过程进行相应处理，具体可以为：当IMS接收到上述查询请求时，IMS可以通过上述处理方式，确定上述待切换的终端具有语音切换能力，IMS可以将携带有该终端相对应的当前呼叫状态信息的具有语音切换能力的通知消息，发送给目标MSC，目标MSC可以提取出当前呼叫状态信息，通过当前呼叫状态信息和该终端的终端标识，在上述对应关系中查找，以判断待切换的终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据目标基站标识和终端标识，进行语音切换处理，相应的处理过程可以参见上述内容，在此不再赘述。
相应地，如果根据本地存储的该终端的呼叫状态信息与语音切换能力 的对应关系，以及当前呼叫状态信息，确定该终端在当前呼叫状态下不具有语音切换能力，则向源MME发送切换失败的通知消息。
在实施中，如果目标MSC通过当前呼叫状态信息、该终端的终端标识和上述对应关系，确定该终端在当前呼叫状态下不具有语音切换能力，则目标MSC可以向源MME发送切换失败的通知消息，此时，源MME可以将切换失败的通知消息发送给源基站，如果某时刻，源基站再次判定需要进行语音切换时，则可以重复上述过程，以完成由第一通信网络到第二通信网络的语音切换。
可选地，上述步骤103中的进行语音切换处理的处理方式可以多种多样，以下还提供了一种可选地处理方式，具体可以包括以下内容：如果接收到IMS发送的具有语音切换能力的通知消息，则获取目标基站标识对应的目标基站的资源占用率，如果资源占用率小于预设的资源占用率阈值，则根据目标基站标识和终端标识，进行语音切换处理。
在实施中，不同的基站在不同时刻的资源占用率可能不同，如果某时刻某基站的资源占用率较高，则进行语音切换后，该基站的负担加重，这样，会造成语音通话质量降低，具体的处理过程可以为：当IMS接收到上述查询请求时，IMS可以通过上述处理方式，确定上述待切换的终端具有语音切换能力，IMS可以将具有语音切换能力的通知消息，发送给目标MSC，目标MSC接收到该通知消息时，可以提取语音切换请求中携带的目标基站标识，目标MSC中可以存储有多个基站的相关信息，例如基站的资源占用率等，然后，目标MSC可以在存储的各基站的资源占用率等信息中查找，得到目标基站标识对应的目标基站的资源占用率，并可以将该资源占用率与预设的资源占用率阈值比较，如果该资源占用率小于上述资源占用率阈值，则可以根据目标基站标识和终端标识，进行语音切换处理，具体处理过程可以参见上述相关内容，在此不再赘述。
可选地，上述步骤103中的进行语音切换处理的处理方式可以多种多样，以下还提供了一种可选地处理方式，具体可以包括以下内容：具有语音切换能力的通知消息中携带有当前呼叫状态信息，如果接收到IMS发送的具有语音切换能力的通知消息，且本地支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则根据目标 基站标识和终端标识，进行语音切换处理。
在实施中，IMS、目标MSC、目标LAI(Location Area Identity，位置区识别码)、目标RNC(Radio Network Controller，无线网络控制器)和/或目标BSC(Base Station Controller，基站控制器)等可能不支持终端进行语音切换，因此，当IMS接收到上述查询请求时，IMS可以通过上述处理方式，确定上述待切换的终端具有语音切换能力，IMS可以将携带有当前呼叫状态信息的具有语音切换能力的通知消息，发送给目标MSC，具体的处理过程可以参见上述相关内容，目标MSC接收到该通知消息后，可以判断上述目标MSC和目标LAI等是否支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，即由4G网络到2G网络的语音切换，如果支持，则根据目标基站标识和终端标识，进行语音切换处理，具体处理过程可以参见上述相关内容，在此不再赘述。
相应地，如果本地不支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则向源MME发送语音切换失败的通知消息。
在实施中，如果通过上述判断，确定本地不支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则目标MSC可以向源MME发送语音切换失败的通知消息，此时，源MME可以将切换失败的通知消息发送给源基站，如果某时刻，源基站再次判定需要进行语音切换时，则可以重复上述过程，以完成由第一通信网络到第二通信网络的语音切换。
可选地，如果上述语音切换失败，可以将目标基站已准备好的资源释放，具体处理过程可以包括以下内容：如果接收到IMS发送的语音切换失败的通知消息，则向目标基站标识对应的目标基站发送资源释放请求，悬置该终端当前使用的第一通信网络的网络资源和该终端当前呼叫状态，当接收到源MME发送的取消语音切换的通知消息时，取消该终端由第一通信网络到第二通信网络的语音切换。
在实施中，如果目标MSC接收到IMS发送的具有所述语音切换能力的通知消息时，目标MSC可以向目标基站发送资源分配请求，目标基站接收到资源分配请求时，可以为本次语音切换准备相应的资源，准备完成 后，向目标MSC发送资源准备完毕的通知消息，目标MSC向IMS发送携带有终端标识的语音切换指令，IMS执行语音切换程序，并且目标MSC通知目标基站进行语音切换，如果在上述过程中由于某些原因导致语音切换失败，如通信网络断开等，此时，IMS可以向目标MSC发送语音切换失败的通知消息，目标MSC接收到该通知消息后，可以向目标基站标识对应的目标基站发送资源释放请求，目标基站可以释放相应的资源，此时，源基站可以保留待切换的终端当前使用的第一通信网络的网络资源和该终端当前呼叫状态，当该终端无法接入到目标信道时，可以通过上述保留的网络资源返回原信道，或者源基站发起业务重建，重新建立一个信道，提供给该终端使用，又或者，通过第一通信网络中除源基站外的其它基站发起业务重建，重新建立一个信道，提供给该终端使用，并向源基站发送携带有终端标识的取消语音切换的通知消息，源基站可以将该通知消息发送给源MME，源MME可以将该通知消息转发给目标MSC，目标MSC接收到该通知消息后，可以取消该终端由第一通信网络到第二通信网络的语音切换，如果在预设的时长内，该终端没有返回原信道，则目标MSC可以取消该终端由第一通信网络到第二通信网络的语音切换，源MME可以释放相应的4G网络资源。其中，上述处理过程还可以为，源MME接收到该通知消息后，可以等待源基站进行检测或者该终端主动放弃语音切换，进而，源MME可以释放相应的4G网络资源。
需要说明的是，上述将当前的呼叫状态信息与终端的语音切换能力进行匹配对比的处理过程还可以由目标MSC完成，具体可以为：如果第一通信网络为预设通信网络，则目标MSC可以向IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，IMS可以将当前的呼叫状态信息和终端的语音切换能力等信息，发送给目标MSC，目标MSC可以将当前的呼叫状态信息与终端的语音切换能力进行匹配对比，进而，判断当前的呼叫状态信息与终端的语音切换能力是否匹配，以完成后续的处理过程，具体的处理过程可以参见上述相关内容，在此不再赘述。
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音 切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
实施例三
下面将结合具体的应用场景，对本发明实施例中取消该终端由第一通信网络到第二通信网络的语音切换的过程进行详细说明，如图2所示，可以包括如下处理步骤：
步骤201，源MME向目标MSC发送语音切换请求。
步骤202，目标MSC向目标基站发送语音切换请求。
步骤203，目标基站向目标MSC发送语音切换确认。
步骤204，IMS向目标MSC发送语音切换响应的通知消息。
步骤205，目标MSC向IMS发送语音切换指令。
步骤206，IMS执行语音切换程序。
步骤207，目标MSC向源MME发送语音切换响应。
步骤208，目标MSC向目标基站发送资源释放请求。
步骤209，源MME向目标MSC发送取消语音切换的通知消息。
步骤210，目标MSC取消该终端由第一通信网络到第二通信网络的语音切换。
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标 识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
实施例四
基于相同的技术构思，本发明实施例还提供了一种语音切换的装置，如图3所示，该装置包括：
接收模块310，用于接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、终端的终端标识和目标基站标识的语音切换请求；
发送模块320，用于如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识；
处理模块330，用于如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息。
可选地，具有语音切换能力的通知消息中携带有当前呼叫状态信息；
处理模块330，用于：
如果接收到IMS发送的具有语音切换能力的通知消息，则根据本地存储的终端的呼叫状态信息与语音切换能力的对应关系，以及当前呼叫状态信息，确定终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据目标基站标识和终端标识，进行语音切换处理；
发送模块320，用于：
如果根据本地存储的终端的呼叫状态信息与语音切换能力的对应关系，以及当前呼叫状态信息，确定终端在当前呼叫状态下不具有语音切换 能力，则向源MME发送切换失败的通知消息。
可选地，处理模块330，用于：
如果接收到IMS发送的具有语音切换能力的通知消息，则获取目标基站标识对应的目标基站的资源占用率，如果资源占用率小于预设的资源占用率阈值，则根据目标基站标识和终端标识，进行语音切换处理。
可选地，该装置还包括取消模块，用于：
如果接收到IMS发送的语音切换失败的通知消息，则向目标基站标识对应的目标基站发送资源释放请求，悬置该终端当前使用的第一通信网络的网络资源和该终端当前呼叫状态，当接收到源MME发送的取消语音切换的通知消息时，取消终端由第一通信网络到第二通信网络的语音切换。
可选地，具有语音切换能力的通知消息中携带有当前呼叫状态信息；
处理模块330，用于：
如果接收到IMS发送的具有语音切换能力的通知消息，且本地支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则根据目标基站标识和终端标识，进行语音切换处理；
发送模块320，用于：
如果本地不支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则向源MME发送语音切换失败的通知消息。
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
需要说明的是：上述实施例提供的语音切换的装置在语音切换时，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将MSC的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。另外，上述实施例提供的语音切换的装置与语音切换的方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
实施例五
请参考图4，其示出了本发明实施例所涉及的MSC的结构示意图，该MSC可以用于实施上述实施例中提供的语音切换的方法。具体来讲：
MSC 1100可因配置或性能不同而产生比较大的差异，可以包括一个或一个以上中央处理器(central processing units，CPU)1122(例如，一个或一个以上处理器)和存储器1132，一个或一个以上存储应用程序1142或数据1144的存储介质1130(例如一个或一个以上海量存储设备)。其中，存储器1132和存储介质1130可以是短暂存储或持久存储。存储在存储介质1130的程序可以包括一个或一个以上模块(图示未示出)，每个模块可以包括对MSC中的一系列指令操作。更进一步地，中央处理器1122可以设置为与存储介质1130通信，在MSC 1100上执行存储介质1130中的一系列指令操作。MSC 1100还可以包括一个或一个以上电源1126，一个或一个以上有线或无线网络接口1150，一个或一个以上输入输出接口1158，一个或一个以上键盘1156，和/或，一个或一个以上操作系统1141，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等等。具体在本实施例中，MSC包括有存储器，以及一个或一个以上的程序，其中一个或者一个以上程序存储于存储器中，且一个或者一个以上程序可以包括一个或一个以上模块，且每个模块可以包括对服务器中的一系列指令操作，且经配置以由一个或者一个以上处理器执行该一个或者一个以上程序包含用于进行以下操作的指令：
接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、终端的终端标识和目标基站标识的语音切换请求；
如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统 IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识；
如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息。
可选地，具有语音切换能力的通知消息中携带有当前呼叫状态信息；
如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理，包括：
如果接收到IMS发送的具有语音切换能力的通知消息，则根据本地存储的终端的呼叫状态信息与语音切换能力的对应关系，以及当前呼叫状态信息，确定终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据目标基站标识和终端标识，进行语音切换处理；
该方法还包括：
如果根据本地存储的终端的呼叫状态信息与语音切换能力的对应关系，以及当前呼叫状态信息，确定终端在当前呼叫状态下不具有语音切换能力，则向源MME发送切换失败的通知消息。
可选地，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理，包括：
如果接收到IMS发送的具有语音切换能力的通知消息，则获取目标基站标识对应的目标基站的资源占用率，如果资源占用率小于预设的资源占用率阈值，则根据目标基站标识和终端标识，进行语音切换处理。
可选地，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理之后，该方法还包括：
如果接收到IMS发送的语音切换失败的通知消息，则向目标基站标识对应的目标基站发送资源释放请求，悬置该终端当前使用的第一通信网络的网络资源和该终端当前呼叫状态，当接收到源MME发送的取消语音切换的通知消息时，取消终端由第一通信网络到第二通信网络的语音切换。
可选地，具有语音切换能力的通知消息中携带有当前呼叫状态信息；
如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理，包括：
如果接收到IMS发送的具有语音切换能力的通知消息，且本地支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则根据目标基站标识和终端标识，进行语音切换处理；
该方法还包括：
如果本地不支持终端在当前呼叫状态信息对应的呼叫状态下由第一通信网络到第二通信网络的语音切换，则向源MME发送语音切换失败的通知消息。
本发明实施例中，接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、该终端的终端标识和目标基站标识的语音切换请求，如果第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询终端当前是否具有由第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，查询请求中携带有终端标识，如果接收到IMS发送的具有语音切换能力的通知消息，则根据目标基站标识和终端标识，进行语音切换处理；如果接收到IMS发送的不具有语音切换能力的通知消息，则向源MME发送切换失败的通知消息，这样，可以在为终端进行语音切换准备资源之前，确定该终端是否具有相应的语音切换能力，只有确定终端具有相应的语音切换能力后，才为该终端准备相应的资源，从而，可以减少资源浪费。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，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 (10)

  1. 一种语音切换的方法，其特征在于，所述方法包括：
    接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、所述终端的终端标识和目标基站标识的语音切换请求；
    如果所述第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询所述终端当前是否具有由所述第一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，所述查询请求中携带有所述终端标识；
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理；如果接收到所述IMS发送的不具有所述语音切换能力的通知消息，则向所述源MME发送切换失败的通知消息。
  2. 根据权利要求1所述的方法，其特征在于，所述具有所述语音切换能力的通知消息中携带有当前呼叫状态信息；
    所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
    所述方法还包括：
    如果根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下不具有语音切换能力，则向所述源MME发送切换失败的通知消息。
  3. 根据权利要求1所述的方法，其特征在于，所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则获 取所述目标基站标识对应的目标基站的资源占用率，如果所述资源占用率小于预设的资源占用率阈值，则根据所述目标基站标识和所述终端标识，进行语音切换处理。
  4. 根据权利要求1所述的方法，其特征在于，所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理之后，所述方法还包括：
    如果接收到所述IMS发送的语音切换失败的通知消息，则向所述目标基站标识对应的目标基站发送资源释放请求，悬置所述终端当前使用的所述第一通信网络的网络资源和所述终端当前呼叫状态，当接收到所述源MME发送的取消语音切换的通知消息时，取消所述终端由所述第一通信网络到所述第二通信网络的语音切换。
  5. 根据权利要求1所述的方法，其特征在于，所述具有语音切换能力的通知消息中携带有当前呼叫状态信息；
    所述如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理，包括：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，且本地支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
    所述方法还包括：
    如果本地不支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则向所述源MME发送语音切换失败的通知消息。
  6. 一种语音切换的装置，其特征在于，所述装置包括：
    接收模块，用于接收源移动管理实体MME发送的携带有待切换的终端当前使用的第一通信网络、所述终端的终端标识和目标基站标识的语音切换请求；
    发送模块，用于如果所述第一通信网络为预设通信网络，则向网络互联协议多媒体子系统IMS发送用于查询所述终端当前是否具有由所述第 一通信网络到本地使用的第二通信网络的语音切换能力的查询请求，所述查询请求中携带有所述终端标识；
    处理模块，用于如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据所述目标基站标识和所述终端标识，进行语音切换处理；如果接收到所述IMS发送的不具有所述语音切换能力的通知消息，则向所述源MME发送切换失败的通知消息。
  7. 根据权利要求6所述的装置，其特征在于，所述具有所述语音切换能力的通知消息中携带有当前呼叫状态信息；
    所述处理模块，用于：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下是否具有语音切换能力，如果是，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
    所述发送模块，用于：
    如果根据本地存储的所述终端的呼叫状态信息与语音切换能力的对应关系，以及所述当前呼叫状态信息，确定所述终端在当前呼叫状态下不具有语音切换能力，则向所述源MME发送切换失败的通知消息。
  8. 根据权利要求6所述的装置，其特征在于，所述处理模块，用于：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，则获取所述目标基站标识对应的目标基站的资源占用率，如果所述资源占用率小于预设的资源占用率阈值，则根据所述目标基站标识和所述终端标识，进行语音切换处理。
  9. 根据权利要求6所述的装置，其特征在于，所述装置还包括取消模块，用于：
    如果接收到所述IMS发送的语音切换失败的通知消息，则向所述目标基站标识对应的目标基站发送资源释放请求，悬置所述终端当前使用的所述第一通信网络的网络资源和所述终端当前呼叫状态，当接收到所述源MME发送的取消语音切换的通知消息时，取消所述终端由所述第一通信网络到所述第二通信网络的语音切换。
  10. 根据权利要求6所述的装置，其特征在于，所述具有语音切换能力的通知消息中携带有当前呼叫状态信息；
    所述处理模块，用于：
    如果接收到所述IMS发送的具有所述语音切换能力的通知消息，且本地支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则根据所述目标基站标识和所述终端标识，进行语音切换处理；
    所述发送模块，用于：
    如果本地不支持终端在所述当前呼叫状态信息对应的呼叫状态下由所述第一通信网络到所述第二通信网络的语音切换，则向所述源MME发送语音切换失败的通知消息。
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