CN105578537B - A kind of method, apparatus of audio call switching and base station - Google Patents
A kind of method, apparatus of audio call switching and base station Download PDFInfo
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Abstract
The embodiment of the present invention discloses method, apparatus and the base station of a kind of audio call switching, wherein method includes: when detecting that terminal initiates audio call and be moved to neighboring community by the current area of the first base station of first network, to obtain the configuration information whether multiple first network adjacent cells adjacent with current area support voice service；According to the configuration information, when detecting the first network adjacent cell for existing in multiple first network adjacent cells and not supporting voice service, measurement instruction is sent to terminal；Obtain the measurement result to the second network adjacent cell adjacent with current area in first network adjacent cell and the second network that terminal is reported according to the measurement instruction；According to the measurement result and configuration information, for the Target cell of terminal selection switching；The current audio call of terminal is switched to Target cell.The solution of the present invention can choose the switching that suitable Target cell carries out audio call, and the audio call of user is protected not interrupt, and improve user experience.
Description
Technical field
The present invention relates to the communications field, method, apparatus and the base station of a kind of audio call switching are particularly related to.
Background technique
LTE wireless network (3GPP Long Term Evolution) is needed if you need to support VoLTE business (voice service based on IMS)
Function upgrading is carried out to the network elements such as eNB and MME (mobile management entity), during actual deployment, in fact it could happen that operator
The network element updatings such as subregional eNB and MME support VoLTE business in the middle part of network, and another part eNB does not upgrade support
VoLTE。
When VoLTE terminal is under the eNB covering for supporting VoLTE business, network will inform that terminal, terminal support VoLTE,
Terminal will carry out VoLTE business by LTE.When terminal leaves LTE covering, if carrying out VoLTE calling, can pass through
SRVCC (double-mode single-standby wireless voice call continuity) mechanism switches the call to 2G/3G circuit domain, guarantees the company of voice service
It is continuous.
But when VoTE terminal enters the LTE covering for not supporting VoLTE business from the LTE covering of support VoLTE business,
SRVCC can't be triggered, therefore when network attempts when establishing VoLTE carrying under target LTE is covered, meeting is due to target network
VoLTE voice is not supported and can not establish the dedicated PDN connection of VoLTE, so that audio call interrupts, user experience is brought
Larger impact.
Summary of the invention
The method, apparatus switched the technical problem to be solved in the present invention is to provide a kind of audio call and base station, so as to
So that VoTE terminal, when entering the LTE covering for not supporting VoLTE business from the LTE covering of support VoLTE business, Ke Yixuan
The switching that suitable Target cell carries out audio call is selected, the audio call of user is protected not interrupt, improves user experience.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of audio call switching, comprising:
Detect that terminal is initiated audio call by the current area of the first base station of first network and is moved to adjacent small
Qu Shi obtains the configuration information whether multiple first network adjacent cells adjacent with current area support voice service；
According to the configuration information, the first net for existing in multiple first network adjacent cells and not supporting voice service is detected
When network adjacent cell, measurement instruction is sent to terminal；
Obtain terminal according to the measurement instruction report in first network adjacent cell and the second network with currently it is small
The measurement result of the second adjacent network adjacent cell of area；
According to the measurement result and configuration information, for the Target cell of terminal selection switching；
The current audio call of terminal is switched to Target cell.
It wherein, is that the step of terminal selects the Target cell switched includes: according to the measurement result and configuration information
When in measurement result there are signal strength be higher than a preset value, and support voice service first network adjacent cell,
Selecting the first network adjacent cell is switching target small area；Or
When the first network adjacent cell in measurement result there are signal strength higher than a preset value, and first network neighbour is small
Area does not support voice service, then selects the second network adjacent cell for the Target cell of switching；Or
When the signal strength of first network adjacent cells all in measurement result is below voice service desired signal intensity threshold
Value then selects the second network adjacent cell for the Target cell of switching.
Wherein, first network is LTE network, and audio call is VoLTE calling, and the second network is 2G/3G network.
Wherein, when selecting the first network adjacent cell as switching target small area, the current audio call of terminal is switched to
The step of Target cell includes:
Switching request of the base station belonging to current area to mobility management entity MME initiation packet domain to packet domain, and
Sv interface between mobile switching center server MSC Server is passed through by MME and initiates double-mode single-standby wireless voice call company
Continuous property SRVCC switching flow, is switched to mobile switching center server MSC Server for voice bearer, complete by MSC Server
While at carrying switching flow, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, instruction IMS domain completes meeting
Switching of the session layer to first network adjacent cell.
Wherein, select the second network adjacent cell for switching Target cell when, the current audio call of terminal is switched to
The step of Target cell includes:
Base station belonging to current area is asked to the switching that mobility management entity MME initiates packet domain PS to circuit domain CS
It asks；Pass through the initiation double-mode single-standby wireless speech of the Sv interface between mobile switching center server MSC Server by MME to exhale
It is continuity SRVCC switching flow, voice bearer is switched to MSC Server, carrying switching flow is completed by MSC Server
While, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, instruction IMS domain completes session layer to the second network
The switching of adjacent cell.
The embodiment of the present invention also provides a kind of device of audio call switching, comprising:
Detection module, for detecting that terminal initiates audio call simultaneously by the current area of the first base station of first network
When being moved to neighboring community, the configuration whether multiple first network adjacent cells adjacent with current area support voice service is obtained
Information；
Sending module does not support language for according to the configuration information, detecting to exist in multiple first network adjacent cells
When the first network adjacent cell of sound business, measurement instruction is sent to terminal；
Obtain module, for obtain terminal according to the measurement instruction report to first network adjacent cell and the second net
The measurement result of the second network adjacent cell adjacent with current area in network；
Determining module, for selecting the Target cell of switching for terminal according to the measurement result and configuration information；
Switching module, for the current audio call of terminal to be switched to Target cell.
Wherein, obtaining module includes:
First obtains submodule, for when there are signal strengths to be higher than a preset value, and support voice industry in measurement result
The first network adjacent cell of business, selecting the first network adjacent cell is switching target small area；Or
Second obtains submodule, for when there are signal strength is small higher than the first network neighbour of a preset value in measurement result
Area, and the first network adjacent cell does not support voice service, then selects the second network adjacent cell for the Target cell of switching；Or
Third obtains submodule, for being below voice when the signal strength of all first network adjacent cells in measurement result
Business desired signal intensity threshold then selects the second network adjacent cell for the Target cell of switching.
Wherein, first network is LTE network, and audio call is VoLTE calling, and the second network is 2G/3G network.
Wherein, switching module is specifically used for the switching request to mobility management entity MME initiation packet domain to packet domain,
Sv interface between mobile switching center server MSC Server is passed through by MME and initiates double-mode single-standby wireless voice call company
Continuous property SRVCC switching flow, is switched to MSC Server for voice bearer, completes the same of carrying switching flow by MSC Server
When, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, it is small to first network neighbour that instruction IMS domain completes session layer
The switching in area.
Wherein, switching module is specifically used for: the switching of packet domain PS to circuit domain CS is initiated to mobility management entity MME
Request；Sv interface between mobile switching center server MSC Server is passed through by MME and initiates double-mode single-standby wireless speech
Voice bearer is switched to MSC Server by call continuity SRVCC switching flow, completes carrying switching stream by MSC Server
While journey, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, instruction IMS domain completes session layer to the second net
The switching of network adjacent cell.
The embodiment of the present invention also provides a kind of base station, including device as described above.
The advantageous effects of the above technical solutions of the present invention are as follows:
Above scheme of the invention is by detecting that terminal initiates language by the current area of the first base station of first network
When sound calls and is moved to neighboring community, obtain whether the multiple first network adjacent cells adjacent with current area support voice industry
The configuration information of business；According to the configuration information, detects to exist in multiple first network adjacent cells and do not support voice service
When first network adjacent cell, measurement instruction is sent to terminal；Obtain terminal according to the measurement instruction report to first network
The measurement result of the second network adjacent cell adjacent with current area in adjacent cell and the second network；According to the measurement result
And configuration information, for the Target cell of terminal selection switching；The current audio call of terminal is switched to Target cell, thus
It is able to detect that target LTE covering lower network does not support VoLTE, and then triggers SRVCC switching, switch the call to 2G/3G electricity
Road domain, to guarantee the continuity of voice service.
Detailed description of the invention
Fig. 1 shows the method flow diagrams of audio call of the invention switching；
Fig. 2 indicates the specific embodiment flow chart of the method for audio call switching of the invention；
Fig. 3 indicates audio call SRVCC switching flow schematic diagram of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in detail.
The embodiment of the present invention is to solve in the prior art, does not support VoLTE in target LTE covering lower network, cannot touch
The problem of sending out SRVCC switching, the embodiment of the present invention provides a kind of audio call switching method and device, can be in target LTE
Covering lower network does not support VoLTE, 2G/3G circuit domain is switched the call to, to guarantee the continuity of voice service.
As shown in Figure 1, the embodiment of the present invention provides a kind of method of audio call switching, comprising:
Step 11, detect that terminal is initiated audio call by the current area of the first base station of first network and is moved to
When neighboring community, the configuration information whether multiple first network adjacent cells adjacent with current area support voice service is obtained；
Step 12, it according to the configuration information, detects to exist in multiple first network adjacent cells and does not support voice service
First network adjacent cell when, to terminal send measurement instruction；
Step 13, obtain terminal according to the measurement instruction report in first network adjacent cell and the second network with
The measurement result of the second adjacent network adjacent cell of current area；
Step 14, according to the measurement result and configuration information, for the Target cell of terminal selection switching；
Step 15, the current audio call of terminal is switched to Target cell.
In the embodiment of the invention, detect that terminal initiates voice by the current area of the first base station of first network
When calling and being moved to neighboring community, obtain whether the multiple first network adjacent cells adjacent with current area support voice service
Configuration information；According to the configuration information, for existing in multiple first network adjacent cells and not supporting voice service is detected
When one network adjacent cell, measurement instruction is sent to terminal；Acquisition terminal reports adjacent to first network according to the measurement instruction
The measurement result of the second network adjacent cell adjacent with current area in cell and the second network；According to the measurement result with
And configuration information, for the Target cell of terminal selection switching；The current audio call of terminal is switched to Target cell, so as to
It enough detects that target LTE covering lower network does not support VoLTE, and then triggers SRVCC switching, switch the call to 2G/3G circuit
Domain, to guarantee the continuity of voice service.
In a specific embodiment of the invention, including on the basis of above-mentioned steps 11-15, step 14 be specifically as follows as
Under several situations:
Situation 1: when there are signal strengths to be higher than a preset value, and the first network neighbour of support voice service in measurement result
Cell, selecting the first network adjacent cell is switching target small area；Wherein, which can be LTE adjacent cell,
That is terminal is currently located LTE cell adjacent cell in the lte networks, terminal from be currently located LTE cell be moved in LTE network with
When the adjacent LTE adjacent cell in current LTE cell, if LTE adjacent cell supports VoLTE business, select the LTE adjacent cell as
The Target cell of VolTE service switching；
Situation 2: when there are the first network adjacent cell that signal strength is higher than a preset value, and first nets in measurement result
Network adjacent cell does not support voice service, then selects the second network adjacent cell for the Target cell of switching；Wherein, the first network is adjacent
Cell can be LTE adjacent cell, i.e. terminal is currently located LTE cell adjacent cell in the lte networks, and terminal is from being currently located LTE
When cell is moved to LTE adjacent cell adjacent with current LTE cell in LTE network, if LTE adjacent cell does not support VoLTE business,
It then can choose Target cell of the adjacent cell adjacent with current LTE cell in 2G or 3G network as VoLTE service switching；
Situation 3: when the signal strength of first network adjacent cells all in measurement result is below voice service desired signal
Intensity threshold then selects the second network adjacent cell for the Target cell of switching；Wherein, which can be LTE
Adjacent cell, i.e. terminal are currently located LTE cell adjacent cell in the lte networks, and terminal is moved to LTE from LTE cell is currently located
In network when the LTE adjacent cell adjacent with current LTE cell, if the signal strength of all LTE adjacent cells is below voice service
Required signal strength threshold then also can choose adjacent cell conduct adjacent with current LTE cell in 2G or 3G network
The Target cell of VoLTE service switching.
Further, in above situation 1, when selecting the first network adjacent cell as switching target small area, above-described embodiment
The switching flow that the current audio call of terminal is switched to Target cell includes: by middle step 15
Switching request of the base station belonging to current area to mobility management entity MME initiation packet domain to packet domain；
MME passes through the Sv interface between mobile switching center server MSC Server and initiates double-mode single-standby wireless speech
Voice bearer is switched to mobile switching center server MSC Server by call continuity SRVCC switching flow；
While completing carrying switching flow by MSC Server, initiate to the session of IP multimedia subsystem IMS domain to cut
Change of current journey, instruction IMS domain complete the switching of session layer to first network adjacent cell.
Further, in above situation 2 and 3, select the second network adjacent cell for switching Target cell when, above-mentioned implementation
Example in step 15, include: by the switching flow that the current audio call of terminal is switched to Target cell
Base station belonging to current area is asked to the switching that mobility management entity MME initiates packet domain PS to circuit domain CS
It asks；
MME passes through the Sv interface between mobile switching center server MSC Server and initiates double-mode single-standby wireless speech
Voice bearer is switched to MSC Server by call continuity SRVCC switching flow；
While MSC Server completes carrying switching flow, initiate to the session of IP multimedia subsystem IMS domain to switch
Process, instruction IMS domain complete the switching of session layer to the second network adjacent cell.
As shown in Fig. 2, the specific implementation flow of the above embodiment of the present invention includes:
1, VoLTE terminal is in the LTE covering for supporting VoLTE, and is carrying out a VoLTE calling；
2, VoLTE terminal will be moved to neighboring community from current area, and eNB discovery terminal is carrying out a VoLTE
It calls, there is the LTE adjacent cell for not supporting VoLTE in neighboring community, therefore it is required that terminal measures the phase of LTE and 2G/3G simultaneously
Adjacent cell；
3, terminal return measurement result；
4, eNB switches target to the support situation selection of VoLTE business according to measurement result and the LTE adjacent cell of configuration
Cell:
5, when in measurement result some LTE adjacent cell signal it is preferable, and the cell also supports VoLTE business, selects the LTE
Adjacent cell is switching target small area；ENB initiates PS to PS HO switching request to source MME；Follow-up process is standard PS to
The normal process of PS HO switching, switches the call to target side network, guarantees call continuity；
6, when in measurement result some LTE adjacent cell signal it is preferable, but the cell does not support VoLTE business, then does not select
The cell is switching target small area, but selects in 2G/3G the preferable cell of signal as Target cell；ENB is sent out to source MME
Play PS to CS HO switching request；Follow-up process is the normal process of standard SRVCC switching, switches the call to target side 2G/
3G circuit-domain network guarantees call continuity；
7, when in measurement result LTE adjacent cell signal be below VoLTE business needed for threshold value, then select signal in 2G/3G
Preferable cell is as Target cell；ENB initiates PS to CS HO switching request to source MME；Follow-up process is standard
The normal process of SRVCC switching, switches the call to target side 2G/3G circuit-domain network, guarantees call continuity；
As shown in figure 3, specific SRVCC switching flow includes:
1, E-UTRAN indicates that MME carries out SR VCC switching.
2, MME passes through the initiation SR VCC process of the Sv interface between MSC Server, and voice bearer is switched to MSC
Server。
3, while MSC Server completes carrying switching flow, the session switching flow for arriving IMS domain is initiated, indicates IMS
The switching of domain completion session layer.
4, after the bearing resource that MSC Server completes the domain CS prepares, E-UTRAN is passed through by Sv interface notification MME, MME
Instruction UE starts to switch.
5, in step 2, MME can also initiate PS switching flow as needed, and non-voice carrying is switched to purpose
The ps domain (SGSN) of GERAN/UTRAN.
The scheme for the SRVCC handover trigger that the above embodiment of the present invention proposes, configures adjacent LTE cell pair by eNB
The support situation of VoLTE business；It is called when eNB discovery terminal is carrying out a VoLTE, exists in neighboring community and do not support
The LTE cell of VoLTE, it is desirable that terminal measures the neighboring community of LTE and 2G/3G simultaneously；ENB is according to measurement result and configuration
LTE adjacent cell selects switching target small area to the support situation of VoLTE business, initiates PS when LTE can support VoLTE business
To PS switching flow, and SRVCC process is initiated when LTE cannot support VoLTE business；So as to detect that target LTE covers
Lid lower network does not support VoLTE, and then triggers SRVCC switching, 2G/3G circuit domain is switched the call to, to guarantee voice industry
The continuity of business.
The embodiment of the present invention also provides a kind of device of audio call switching, comprising:
Detection module, for detecting that terminal initiates audio call simultaneously by the current area of the first base station of first network
When being moved to neighboring community, the configuration whether multiple first network adjacent cells adjacent with current area support voice service is obtained
Information；
Sending module does not support language for according to the configuration information, detecting to exist in multiple first network adjacent cells
When the first network adjacent cell of sound business, measurement instruction is sent to terminal；
Obtain module, for obtain terminal according to the measurement instruction report to first network adjacent cell and the second net
The measurement result of the second network adjacent cell adjacent with current area in network；
Determining module, for selecting the Target cell of switching for terminal according to the measurement result and configuration information；
Switching module, for the current audio call of terminal to be switched to Target cell.
Wherein, obtaining module includes: the first acquisition submodule, for when there are signal strengths to be higher than one in advance in measurement result
If value, and support the first network adjacent cell of voice service, selecting the first network adjacent cell is switching target small area；Or
Second obtains submodule, for when there are signal strength is small higher than the first network neighbour of a preset value in measurement result
Area, and the first network adjacent cell does not support voice service, then selects the second network adjacent cell for the Target cell of switching；Or
Third obtains submodule, for being below voice when the signal strength of all first network adjacent cells in measurement result
Business desired signal intensity threshold then selects the second network adjacent cell for the Target cell of switching.
Wherein, first network is LTE network, and audio call is VoLTE calling, and the second network is 2G/3G network.
Switching module is specifically used for the switching request to mobility management entity MME initiation packet domain to packet domain, by MME
Double-mode single-standby wireless voice call continuity is initiated by the Sv interface between mobile switching center server MSC Server
Voice bearer is switched to MSC Server by SRVCC switching flow, while completing carrying switching flow by MSC Server,
The session switching flow of IP multimedia subsystem IMS domain is initiated, instruction IMS domain completes session layer to first network adjacent cell
Switching.
Switching module is specifically used for: the switching request of packet domain PS to circuit domain CS is initiated to mobility management entity MME；
Sv interface between mobile switching center server MSC Server is passed through by MME and initiates double-mode single-standby wireless voice call company
Continuous property SRVCC switching flow, is switched to MSC Server for voice bearer, completes the same of carrying switching flow by MSC Server
When, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, it is small to the second network neighbour that instruction IMS domain completes session layer
The switching in area.
It should be understood that the device is device corresponding to the above method embodiment, institute in above method embodiment
There is implementation suitable for the embodiment of the device, can also reach identical technical effect.
The embodiment of the present invention also provides a kind of base station, including device as described above.
In the above method of the invention, by detecting that terminal is initiated by the current area of the first base station of first network
Audio call and when being moved to neighboring community, obtains whether the multiple first network adjacent cells adjacent with current area support voice
The configuration information of business；According to the configuration information, detects to exist in multiple first network adjacent cells and do not support voice service
First network adjacent cell when, to terminal send measurement instruction；Obtain terminal according to the measurement instruction report to the first net
The measurement result of the second network adjacent cell adjacent with current area in network adjacent cell and the second network；It is tied according to the measurement
Fruit and configuration information, for the Target cell of terminal selection switching；The current audio call of terminal is switched to Target cell, from
And it is able to detect that target LTE covering lower network does not support VoLTE, and then trigger SRVCC switching, switch the call to 2G/3G
Circuit domain, to guarantee the continuity of voice service.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (9)
1. a kind of method of audio call switching characterized by comprising
When detecting that terminal initiates audio call and be moved to neighboring community by the current area of the first base station of first network,
Obtain the configuration information whether multiple first network adjacent cells adjacent with current area support voice service；
According to the configuration information, detects to exist in multiple first network adjacent cells and do not support the first network of voice service adjacent
When cell, measurement instruction is sent to terminal；
Obtain terminal according to the measurement instruction report in first network adjacent cell and the second network with current area phase
The measurement result of the second adjacent network adjacent cell；
According to the measurement result and configuration information, for the Target cell of terminal selection switching；
The current audio call of terminal is switched to Target cell；
The first network is LTE network, and audio call is VoLTE calling, and second network is 2G/3G network.
2. the method for audio call switching according to claim 1, which is characterized in that according to the measurement result and match
Confidence breath is that the step of terminal selects the Target cell switched includes:
When there are signal strengths to be higher than a preset value, and the first network adjacent cell of support voice service, selection in measurement result
The first network adjacent cell is switching target small area；Or
When the first network adjacent cell in measurement result there are signal strength higher than a preset value, and the first network adjacent cell is not
It supports voice service, then selects the second network adjacent cell for the Target cell of switching；Or
When the signal strength of first network adjacent cells all in measurement result is below voice service desired signal intensity threshold, then
Select the second network adjacent cell for the Target cell of switching.
3. the method for audio call according to claim 2 switching, which is characterized in that select the first network adjacent cell for
When switching target small area, the step of current audio call of terminal is switched to Target cell, includes:
Switching request of the base station belonging to current area to mobility management entity MME initiation packet domain to packet domain, and by MME
Double-mode single-standby wireless voice call continuity is initiated by the Sv interface between mobile switching center server MSC Server
Voice bearer is switched to mobile switching center server MSC Server by SRVCC switching flow, is held by MSC Server completion
While carrying switching flow, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, instruction IMS domain completes session layer
To the switching of first network adjacent cell.
4. the method for audio call switching according to claim 2, which is characterized in that select the second network adjacent cell to cut
When the Target cell changed, the step of current audio call of terminal is switched to Target cell, includes:
The switching request of packet domain PS to circuit domain CS is initiated to mobility management entity MME in base station belonging to current area；By
It is continuous that MME passes through the initiation of the Sv interface between mobile switching center server MSC Server double-mode single-standby wireless voice call
Property SRVCC switching flow, voice bearer is switched to MSC Server, by MSC Server complete carrying switching flow it is same
When, the session switching flow for arriving IP multimedia subsystem IMS domain is initiated, it is small to the second network neighbour that instruction IMS domain completes session layer
The switching in area.
5. a kind of device of audio call switching characterized by comprising
Detection module, for detecting that terminal initiates audio call and movement by the current area of the first base station of first network
When to neighboring community, obtain whether the multiple first network adjacent cells adjacent with current area support voice service matches confidence
Breath；
Sending module does not support voice industry for according to the configuration information, detecting to exist in multiple first network adjacent cells
When the first network adjacent cell of business, measurement instruction is sent to terminal；
Obtain module, for obtain terminal according to the measurement instruction report in first network adjacent cell and the second network
The measurement result of the second network adjacent cell adjacent with current area；
Determining module, for selecting the Target cell of switching for terminal according to the measurement result and configuration information；
Switching module, for the current audio call of terminal to be switched to Target cell；
The first network is LTE network, and audio call is VoLTE calling, and second network is 2G/3G network.
6. the device of audio call switching according to claim 5, which is characterized in that obtaining module includes:
First obtains submodule, and for working as, there are signal strengths to be higher than a preset value in measurement result, and supports voice service
First network adjacent cell, selecting the first network adjacent cell is switching target small area；Or
Second obtains submodule, for working as the first network adjacent cell in measurement result there are signal strength higher than a preset value,
And the first network adjacent cell does not support voice service, then selects the second network adjacent cell for the Target cell of switching；Or
Third obtains submodule, for being below voice service when the signal strength of all first network adjacent cells in measurement result
Desired signal intensity threshold then selects the second network adjacent cell for the Target cell of switching.
7. the device of audio call switching according to claim 6, which is characterized in that switching module is specifically used for movement
Property management entity MME initiate packet domain to the switching request of packet domain, passed through by MME and mobile switching center server MSC
Sv interface between Server initiates double-mode single-standby wireless voice call continuity SRVCC switching flow, and voice bearer is switched
To MSC Server, while completing carrying switching flow by MSC Server, the meeting for arriving IP multimedia subsystem IMS domain is initiated
Switching flow is talked about, instruction IMS domain completes the switching of session layer to first network adjacent cell.
8. the device of audio call switching according to claim 6, which is characterized in that switching module is specifically used for: Xiang Yi
The switching request of mobility management entity MME initiation packet domain PS to circuit domain CS；Passed through by MME and Mobile Switching Center Server
Sv interface between MSC Server initiates double-mode single-standby wireless voice call continuity SRVCC switching flow, by voice bearer
It is switched to MSC Server, while completing carrying switching flow by MSC Server, initiates to arrive IP multimedia subsystem IMS domain
Session switching flow, instruction IMS domain complete session layer to the second network adjacent cell switching.
9. a kind of base station, which is characterized in that including such as described in any item devices of claim 5-8.
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| CN108476453A (en) * | 2016-09-05 | 2018-08-31 | 华为技术有限公司 | A kind of method, terminal and the storage medium of voice switching |
| CN113810419B (en) * | 2016-11-09 | 2023-09-19 | 联发科技股份有限公司 | Method for enhancing multimedia call control, base station and user equipment thereof |
| WO2018102970A1 (en) * | 2016-12-05 | 2018-06-14 | 华为技术有限公司 | Method and apparatus for creating voice bearer |
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