CN115734385A

CN115734385A - Voice service flow control method and system

Info

Publication number: CN115734385A
Application number: CN202111007216.7A
Authority: CN
Inventors: 程运; 王贻先
Original assignee: CICT Mobile Communication Technology Co Ltd
Current assignee: CICT Mobile Communication Technology Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2023-03-03

Abstract

The invention provides a method and a system for controlling a voice service process, which comprises the following steps: receiving a terminal RRC establishment request or a recovery request; if the voice service is judged to be not supported, other adjacent base station cells supporting the voice service are determined; sending a terminal releasing request to a core network, and redirecting the terminal to an adjacent base station cell; and after the terminal finishes the voice service, starting a terminal survival detection function to enable the terminal to enter an RRC (radio resource control) inactive state and reside in a preset network system corresponding to the voice service. The invention sends the RRC release information to the terminal in advance and redirects the terminal to the 4G/5G adjacent area supporting the voice service under the condition that the 4G/5G base station does not support the voice service, thereby better ensuring that the terminal normally carries out the voice service in the 4G/5G system, simplifying the flow, saving resources, continuously remaining in the 4G/5G system after completing the voice service, saving the control signaling overhead caused by the inter-system interoperation flow and improving the user service experience.

Description

Voice service process control method and system

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and a system for controlling a voice service process.

Background

In the 4G/5G system, because the terminal needs to perform the voice service, it initiates an RRC (Radio Resource Control) connection establishment/recovery request to the base station to establish/recover an RRC connection to perform the voice service. However, due to reasons such as network deployment requirements of operators, the base station only supports data services and does not support voice services, and in this case, when the UE initiates an RRC connection establishment/recovery request to perform a voice service, the base station needs to redirect or switch the UE to a 2G or 3G/4G cell of an adjacent station when the core network sends an S1/NG message to the base station to trigger the base station to perform a VoLTE/VoNR service.

When the base station does not support the voice service, the current VoNR mainstream mode is to assign the UE to the 4G neighboring cell for the VOLTE service through the EPS Fallback, and when the voice service is completed, the UE is returned to the NR cell through the redirection mode, and when the 4G base station does not support the VOLTE service, the UE is usually switched or redirected to the 2G/3G, and after the call is completed, the UE is returned to the 4G base station through the redirection and other technologies. The flow has larger time delay and is tedious and similar, and for VoNR, the voice needs to be returned to the NR system again through a redirection flow after the 4G system completes the voice, so that the inter-system interoperation flow signaling overhead and the UE measurement overhead are increased.

Disclosure of Invention

The invention provides a method and a system for controlling a voice service process, which are used for solving the defects in the prior art.

In a first aspect, the present invention provides a method for controlling a voice service flow, including:

receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal;

if the voice service request in the RRC establishment request or the recovery request is judged to be not supported, other adjacent base station cells supporting the voice service are determined;

sending a terminal releasing request to a core network, and redirecting the terminal to the adjacent base station cell;

and after the terminal finishes the voice service, starting a terminal survival detection function, so that the terminal enters an RRC (radio resource control) inactive state and resides in a preset network system corresponding to the voice service.

In one embodiment, the receiving of the RRC establishment request or the recovery request sent by the terminal previously includes:

when connection is established between adjacent base stations, a non-support voice service identification cell is newly added in the establishment request and response message;

when the adjacent base station configuration is updated, the non-support voice service identification information element is newly added in the configuration updating request message and the configuration updating response message.

In one embodiment, the voice service request is a 4G voice service request or a 5G voice service request, and the preset network system is a 4G network or a 5G network.

In a second aspect, the present invention further provides a method for controlling a voice service process, including:

sending an RRC establishment request or a recovery request to a current base station;

receiving a redirection request message issued by the current base station, and accessing an adjacent base station cell supporting voice service based on the redirection request message;

processing voice service when accessing the adjacent base station cell;

and after the voice service is finished, receiving an RRC configuration message issued by the adjacent base station cell, entering an RRC inactive state, and residing in a preset network system corresponding to the voice service.

In one embodiment, the receiving a redirection request message sent by the current base station, and accessing an adjacent base station cell supporting a voice service based on the redirection request message includes:

receiving a disconnection request message sent by a core network and the current base station, and receiving an access frequency point of an adjacent base station sent by the current base station;

based on the access frequency point of the adjacent base station, determining the measurement of the adjacent base station and initiating random access in the cell of the adjacent base station;

and after the random access is successful, finishing the RRC connection with the adjacent base station cell and reattaching the core network.

In a third aspect, the present invention further provides a system for controlling a voice service process, including:

the receiving module is used for receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal;

a determining module, configured to determine, if it is determined that the voice service is not supported based on the voice service request in the RRC establishment request or the recovery request, other neighboring base station cells that support the voice service;

a first redirection module, configured to send a request for releasing a terminal to a core network, so that the terminal is redirected to the neighboring base station cell;

and the first residing module is used for starting a terminal survival detection function after the terminal completes the voice service, so that the terminal enters an RRC (radio resource control) inactive state and resides in a preset network system corresponding to the voice service.

In a fourth aspect, the present invention further provides a voice service process control system, including:

a sending module, configured to send an RRC establishment request or a recovery request to a current base station;

a second redirection module, configured to receive a redirection request message issued by the current base station, and access an adjacent base station cell supporting a voice service based on the redirection request message;

the processing module is used for processing voice service by accessing the adjacent base station cell;

and the second residing module is used for receiving the RRC configuration message issued by the adjacent base station cell after the voice service is finished, entering an RRC non-activated state, and residing in a preset network system corresponding to the voice service.

In a fifth aspect, the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the voice service flow control method according to any one of the above-mentioned embodiments.

In a sixth aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the voice traffic flow control method according to any one of the above.

In a seventh aspect, the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the voice service flow control method described in any one of the above are implemented.

The method and the system for controlling the voice service process provided by the invention have the advantages that the RRC release information is sent to the terminal in advance under the condition that the 4G/5G base station does not support the voice service, and the terminal is redirected to the 4G/5G adjacent region supporting the voice service, so that the normal voice service of the terminal in the 4G/5G system is well ensured, the process is simplified, the resources are saved, the terminal is continuously remained in the 4G/5G system after completing the voice service, the control signaling overhead caused by the inter-operation process of different systems is saved, and the user service experience is improved.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic flow chart of a voice service flow control method provided by the present invention;

FIG. 2 is a flow chart of the newly added parameters of the Xn/x2 establishing process provided by the present invention;

FIG. 3 is a flow chart of a new parameter for configuration update of a base station according to the present invention;

fig. 4 is a second schematic flow chart of the voice service flow control method provided in the present invention;

FIG. 5 is a flow chart of the voice service of the original 4G IDLE state terminal of the present invention;

FIG. 6 is a flow chart of the improved 4G IDLE state voice service provided by the present invention;

fig. 7 is a flow chart of the voice service of the original 4G INACTIVE state terminal of the present invention;

FIG. 8 is a flow chart of the improved 4G INACTIVE state voice service provided by the present invention;

fig. 9 is a flow chart of the voice service of the original 5G IDLE state terminal of the present invention;

FIG. 10 is a flow chart of the improved 5G IDLE state voice service provided by the present invention;

FIG. 11 is a flow chart of the voice service of the original 5G INACTIVE state terminal of the present invention;

FIG. 12 is a flow chart of the improved 5G INACTIVE state voice service provided by the present invention;

FIG. 13 is a schematic structural diagram of a voice service flow control system provided in the present invention;

FIG. 14 is a second schematic structural diagram of a voice service flow control system provided in the present invention;

fig. 15 is a schematic structural diagram of an electronic device provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The RRC is a message configuration center and a control center of an access layer of the whole wireless communication protocol stack, and the importance of the RRC is self-evident. There is a new RRC _ INACTIVE between RRC _ CONNECTED and RRC _ IDLE, in which the base station and the UE can choose to remain INACTIVE without completely releasing the RRC-established bearer when there is no traffic data transmission.

RRC has three states: IDLE, INACTIVE, CONNECTED, each state having its corresponding functional characteristics: (1) features of RRC _ IDLE: PLMN selection, system information broadcast, cell reselection, called paging initiated by a core network, and DRX (Discontinuous Reception) configured by a core network NAS (Non-Access-Stratum) in a called paging area and used for CN paging; (2) PLMN selection, system information broadcasting, cell reselection, called paging initiated by a base station, notification area based on RAN managed by the base station, DRX of RAN paging configured by the base station, core network-base station connection (user plane and control plane) maintenance, AS context of UE stored in the base station and the UE, RNA where the UE is known by the base station; (3) features of RRC _ CONNECTED: establishing core network-base station connection of the UE, storing the AS context of the UE in the base station and the UE, knowing a cell where the UE is located by the base station, transmitting unicast data to/from the UE, and controlling the mobility of the UE by a network. The RRC _ INACTIVE state is a "combination" of RRC _ IDLE and RRC _ CONNECTED, and mobility in the INACTIVE state is controlled by the UE (through cell reselection) and is the same AS mobility in the IDLE state, and the INACTIVE state and the CONNECTED state maintain the connection between the core network and the base station and the context of the AS layer.

When the 4G/5G terminal in the IDLE/INACTIVE state needs to do voice service, the RRC connection is established/recovered by respectively sending RRCsetup request/RRC resumerRequest messages to the base station, so that voice call is completed. The 4G Voice, namely VoLTE, and the 5G Voice, namely VoNR, refers to Voice over NR, which is a technical solution of 5G Voice. At present, the 5G technology mainly has two voice technical schemes, one is VoNR, mainly aiming at an NR terminal, a calling party and a called party are provided by NR/NGC, and when NR has no coverage or weak coverage, service continuity interoperation with VoLTE after call connection needs to be considered; the other is EPS fallback, for the NR terminal, when the NR initiates a voice call, the NR network controls to fallback to 4G, and the VoLTE provides voice, which needs to consider the service continuity interoperation with VoLTE when the call is established. Based on the characteristics of ultra-low time delay and high reliability of 5G, voNR can provide a better use experience for users. The voice scheme of 4G mainly comprises VoLTE and CSFB, wherein the VoLTE and CSFB are an IP data transmission technology based on IMS voice service, and the terminal accesses the IMS system through EPS to complete the voice service; the latter is suitable for the scene of overlapping coverage of 2G/3G circuit domain and 4G network, no IMS system needs to be deployed, and in the initial stage of 4G network establishment, the operator can adopt CSFB voice fallback technology for the terminal supporting CSFB for the protection of the existing 2G/3G CS investment.

Aiming at the problems in the prior art, the invention adopts the technical scheme that after a 4G/5G base station receives RRCSetupRequest/RRC ResumeRequest sent by a terminal, the current UE is judged to need to carry out voice service according to the Establishmencause = mo-VoiceCall/resumeHeause = mo-VoiceCall carried in a message. If the base station does not support the voice service, a cell supporting the voice service in the adjacent 4G/5G base station is searched, UE is appointed to measure the cell through RRC release message and carries out the voice service in the cell, and a core network is informed to release the UE, wherein the release reason is REDIRECTION.

Fig. 1 is a schematic flow diagram of a voice service flow control method provided by the present invention, and as shown in fig. 1, a corresponding execution main body is a base station, which includes:

101, receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal;

102, if the voice service request in the RRC establishment request or the recovery request is judged to be not supported, determining other neighboring base station cells supporting the voice service;

103, sending a terminal release request to a core network, so that the terminal is redirected to the neighboring base station cell;

and 104, starting a terminal survival detection function after the terminal completes the voice service, so that the terminal enters an RRC (radio resource control) inactive state and resides in a preset network system corresponding to the voice service.

Specifically, in the prior art, when the 4G/5G base station does not support the voice service, when receiving the RRCSetup Request/RRCresumeRequest sent by the UE, resources are still allocated to the UE through the RRC Setup/RRC response, and then an S1/NG message subsequently sent by the core network is waited to trigger the next EPS Fallback/CSFB procedure, and the procedure falls back to the 4G/2G and 3G for the voice service, which is tedious, has a large delay, and is poor in user experience.

Aiming at the problems, the time for issuing the RRC Release to the UE is advanced by the base station side, namely after the base station receives the RRC SetupRequest/RRC Resume Request sent by the UE, the base station judges that the current base station does not support the voice service, immediately finds the 5G/4G adjacent cell supporting the voice service from the database and issues the adjacent cell to the UE for measurement, and performs the voice service in the cell. Instead of continuing to send the RRC Setup/RRC Resume message allocation resource (the resource can be reserved for other UEs) to the UE after receiving the RRCSetupRequest/RRC Resume Request of the UE, the UE is not required to be informed to measure the adjacent cell after the core network sends S1/NG message to trigger the voice service.

For the 4G system, after receiving an RRC setup request/RRCresumeRequest message which is sent by UE and carries a reason mo-VoiceCall, the 4G base station which does not support the VoLTE function immediately queries a database to find a cell of an adjacent base station supporting VoLTE, and sends cell information to the UE for measurement through an RRC Release message. After the UE completes the voice service in the 4G cell, the UE returns to the RRC INACTIVE state again through the survival detection function of the base station and is maintained in the 4G system, and when data service or voice service needs to be performed next time, the UE can quickly recover the connection and enjoy high-quality service provided by the 4G system;

for a 5G system, after a 5G base station which does not support the VoNR function receives an RRC setup request/RRCresumRequest message which is sent by UE and carries the reason of mo-VoiceCall, a database is immediately inquired to find a cell of an adjacent base station supporting the VoNR, and the cell information is sent to the UE through an RRC Release message for measurement. After the voice service is completed in the 5G cell, the UE returns to the RRC INACTIVE state again through the survivability detection function of the base station, and is maintained in the 5G system, so that when data service or voice service needs to be performed next time, the UE can quickly resume connection and enjoy the high-quality service provided by the 5G system.

The invention sends the RRC release information to the terminal in advance under the condition that the 4G/5G base station does not support the voice service, and redirects the terminal to the 4G/5G adjacent area supporting the voice service, thereby better ensuring that the terminal normally carries out the voice service in the 4G/5G system, simplifying the flow, saving resources, continuously remaining in the 4G/5G system after the terminal finishes the voice service, saving the control signaling overhead caused by the inter-system interoperation flow and improving the user service experience.

Based on the above embodiment, the method step 101 includes:

when the connection is established between the adjacent base stations, a non-support voice service identification cell is newly added in the establishment request and response message;

when the adjacent base station is configured and updated, the non-support voice service identification cell is newly added in the configuration updating request message and the configuration updating response message.

Specifically, for a 4G network, as shown in fig. 2, when an adjacent base station establishes an X2 connection, a new cell VoLTE Disable Indication is added in an X2 SETUP REQUEST/X2 SETUP RESPONSE message, and is used to indicate whether the base station supports VoLTE voice service; as shown in fig. 3, when the CONFIGURATION of the neighboring base station is updated, a VoLTE Disable Indication is newly added in an ENB CONFIGURATION UPDATE/ENB CONFIGURATION UPDATE acknowledgement message, and is used to indicate whether the base station supports VoLTE voice service. The newly added cell VoLTE Disable Indication is optional configuration, and when the configuration exists, the base station does not support VoLTE voice service. And the base station stores the VoLTE voice service support mark of the adjacent station in a database for the redirected alternative adjacent cell.

For 5G network, as shown in fig. 2, for 5G system, when the adjacent base station establishes XN connection, add new cell VoNR Disable Indication in XN SETUP REQUEST/XN SETUP RESPONSE message for indicating whether the base station supports VoNR voice service; as shown in fig. 3, when the CONFIGURATION of the neighboring base station is updated, an element VoNR Disable Indication is newly added in the NG-RAN NODE CONFIGURATION UPDATE/NG-RAN NODE CONFIGURATION UPDATE access message to indicate whether the base station supports the VoNR voice service. The newly added cell VoNR Disable Indication is optional configuration, and when the configuration exists, the base station does not support the VoNR voice service. And the base station stores the VoNR voice service support mark of the adjacent station in a database for the redirected alternative adjacent cell.

The invention adds the cell VoNR Disable Indication/VoLTE Disable Indication in the Xn/X2 message to identify whether the 5G/4G base station supports the voice service, the base station stores the newly added parameter attribute in the database for the redirected alternative cell, thereby saving the control signaling overhead caused by the inter-system interoperation process and the inter-system measurement process of the UE, and simplifying the overall switching process.

Fig. 4 is a second schematic flow chart of the voice service flow control method provided by the present invention, and as shown in fig. 4, the corresponding execution subject is a terminal, which includes:

201, sending an RRC establishment request or a recovery request to a current base station;

202, receiving a redirection request message issued by the current base station, and accessing an adjacent base station cell supporting voice service based on the redirection request message;

203, processing voice service when accessing the adjacent base station cell;

and 204, after the voice service is finished, receiving an RRC configuration message issued by the adjacent base station cell, entering an RRC inactive state, and residing in a preset network system corresponding to the voice service.

Wherein, the receiving the redirection request message issued by the current base station, and accessing the adjacent base station cell supporting the voice service based on the redirection request message comprises:

Specifically, for the 4G system, after the 4G base station that does not support the VoLTE function receives the RRCsetup request/RRCresumeRequest message carrying the mo-VoiceCall as the cause sent by the UE, the database is immediately queried to find a cell of an adjacent base station that supports VoLTE, and the cell information is sent to the UE through the RRC Release message for measurement. After the voice service is completed in the 4G cell, the UE returns to the RRC INACTIVE state again through the survivability detection function of the base station, and is maintained in the 4G system, so that when data service or voice service needs to be performed next time, the UE can quickly resume connection and enjoy the high-quality service provided by the 4G system.

For a 5G system, after a 5G base station which does not support the VoNR function receives an RRC setup request/RRCresumeRequest message which is sent by UE and carries a reason mo-VoiceCall, a database is immediately inquired to find a cell of an adjacent base station which supports VoNR, and the cell information is sent to the UE for measurement through an RRC Release message. After the voice service is completed in the 5G cell, the UE returns to the RRC INACTIVE state again through the survival detection function of the base station and is maintained in the 5G system, and when data service or voice service needs to be performed next time, the UE can quickly recover the connection and enjoy the high-quality service provided by the 5G system.

The solution according to the invention will be illustrated below with reference to specific examples:

1. compared with the original voice service flow of the terminal in the 4G IDLE state, referring to fig. 5, the present invention provides an improved voice service flow in the 4G IDLE state, referring to fig. 6, and the specific flow includes:

step 100: acquiring whether the adjacent base station supports VoLTE (Voice over Long term evolution) attribute through an X2 connection establishment or enb configuration updating process;

step 101: when the UE is required to be used as a voice service, sending an RRCSetuprequest message to a base station ENB1 to carry a reason mo-VoiceCall;

step 102: the current base station ENB1 receives an RRC connection establishment request message sent by the UE, and knows that the purpose of the UE for requesting to establish connection is voice service by judging the EstablishAuse. Inquiring a database of the base station to obtain that the current attribute is that the voice service is not supported, immediately inquiring an adjacent base station supporting the voice service from the database, and finally selecting a certain 4G cell under ENB 2;

step 103: the current base station ENB1 sends a UE context release request message to a core network MME, requests to release the current UE and carries a release reason as redirect;

step 104: the current base station ENB1 sends the frequency point information of the 4G neighbor cell found in the step 102 to the UE for measurement through an RRC Release message, and the UE is required to be redirected to the cell;

step 105: after receiving the redirection message, the UE starts to execute the measurement of the designated 4G cell and initiates random access in the cell;

step 106 to step 108: the UE is randomly accessed in the adjacent area to successfully complete RRC connection and successfully attach to a core network;

step 109: UE completes IMS registration and voice service in 4G adjacent area under ENB 2;

steps 110 to 111: and starting a UE survival detection function of the ENB2, judging that no service exists in the UE within a period of time, informing the UE to enter an RRC INACTIVE state through an RRC Release message carrying RRC-INACTIVE config, and continuously remaining in the 4G system.

2. Compared with the original voice service flow of the 4G INACTIVE state terminal, referring to fig. 7, the invention provides an improved 4G INACTIVE state voice service flow, referring to fig. 8, the specific flow includes:

step 200: acquiring whether the adjacent base station supports VoLTE (Voice over Long term evolution) attribute through an X2 connection establishment or enb configuration updating process;

step 201: when the UE is required to be used as a voice service, sending an RRCResuRequest message to a base station ENB1 to carry a reason mo-VoiceCall;

step 202: the current base station ENB1 receives an RRC recovery request message sent by the UE, and learns that the purpose of UE connection recovery is voice service by judging resume _ Hease. Inquiring a database of the base station to obtain that the current attribute is that the voice service is not supported, immediately inquiring an adjacent base station supporting the voice service from the database, and finally selecting a certain 4G cell under ENB 2;

step 203: the current base station ENB1 sends a UE context release request message to a core network MME, requests to release the current UE and carries a release reason as redirect;

step 204: the current base station ENB1 sends the frequency point information of the 4G neighbor cell found in step 202 to the UE through an RRC Release message for measurement, and requires the UE to be redirected to the cell;

step 205: after receiving the redirection message, the UE starts to execute the measurement of the designated 4G cell and initiates random access in the cell;

step 206 to step 208: the UE is randomly accessed in the adjacent area to successfully complete RRC connection and successfully attach to a core network;

step 209: UE completes IMS registration and voice service in a 4G adjacent cell under ENB 2;

step 210-211: and starting a UE survival detection function of the ENB2, judging that the UE has no service within a period of time, informing the UE to enter an RRC INACTIVE state through an RRC Release message carrying RRC-INACTIVE config, and continuing to stay in the 4G system.

3. Compared with the original voice service flow of the terminal in the 5G IDLE state, referring to fig. 9, the present invention provides an improved voice service flow in the 5G IDLE state, referring to fig. 10, where the specific flow includes:

step 300: acquiring whether the adjacent base station supports the attribute of VoNR or not through the Xn connection establishment or the NG-RAN NODE configuration updating process;

step 301: when the UE is required to be used as a voice service, the UE sends an RRCSetuprequest message to the base station GNB1 to carry a reason mo-VoiceCall;

step 302: the current base station GNB1 receives the RRC recovery request message sent by the UE, and knows that the purpose of the UE for requesting to establish connection is voice service by judging the EstablishAuse. Inquiring a database of the base station to obtain that the current attribute is that the voice service is not supported, immediately inquiring an adjacent base station supporting the voice service from the database, and finally selecting a certain NR cell under GNB 2;

step 303: the current base station GNB1 sends a UE context release request message to a core network AMF, and requests to release the current UE and carries a release reason as redirect;

step 304: the current base station GNB1 sends the information of the frequency point/SCS of the NR neighboring cell found in step 302 to the UE through an RRC Release message for measurement, and requests the UE to be redirected to the cell;

step 305: after receiving the redirection message, the UE starts to execute the measurement of the designated NR cell and initiates random access in the cell;

step 306-308: the UE successfully completes RRC connection in the adjacent cell by random access and successfully attaches to a core network;

step 309: UE completes IMS registration and voice service in NR neighboring area under GNB 2;

step 310 to step 311: and starting a UE survival detection function of the GNB2, judging that no service exists in the UE within a period of time, informing the UE to enter an RRC INACTIVE state through suspension config carried by an RRC Release message, and continuously remaining in the 5G system.

4. Compared with the original voice service flow of the 5G INACTIVE state terminal, referring to fig. 11, the invention provides an improved 5G INACTIVE state voice service flow, referring to fig. 12, and the specific flow includes:

step 400: acquiring whether the adjacent base station supports the attribute of VoNR or not through the Xn connection establishment or the NG-RAN NODE configuration updating process;

step 401: when the UE is required to be used as a voice service, sending an RRCResuRequest message to a base station GNB1 to carry a reason mo-VoiceCall;

step 402: the current base station GNB1 receives the RRC recovery request message sent by the UE, and learns that the purpose of UE connection recovery is voice service by judging resume _ Hease. Inquiring a database of the base station to obtain that the current attribute is that the voice service is not supported, immediately inquiring an adjacent base station supporting the voice service from the database, and finally selecting a certain NR cell under GNB 2;

step 403: the current base station GNB1 sends a UE context release request message to a core network AMF, and requests to release the current UE and carries a release reason as redirect;

step 404: the current base station GNB1 sends the information of the frequency point/SCS and the like of the NR neighbor cell found in the step 402 to the UE for measurement through an RRC Release message, and the UE is required to be redirected to the cell;

step 405: after receiving the redirection message, the UE starts to execute the measurement of the designated NR cell and initiates random access in the cell;

steps 406 to 408: the UE is randomly accessed in the adjacent area to successfully complete RRC connection and successfully attach to a core network;

step 409: UE completes IMS registration and voice service in NR neighboring area under GNB 2;

step 410-411: and starting a UE survival detection function of the GNB2, judging that no service exists in the UE within a period of time, informing the UE to enter an RRC INACTIVE state through suspension config carried by an RRC Release message, and continuously remaining in the 5G system.

The voice service process control system provided by the present invention is described below, and the voice service process control system described below and the voice service process control method described above may be referred to correspondingly.

Fig. 13 is a schematic structural diagram of a voice service flow control system provided in the present invention, as shown in fig. 13, including: a receiving module 1301, a determining module 1302, a first redirecting module 1303 and a first residing module 1304, wherein:

the receiving module 1301 is configured to receive a radio resource control RRC establishment request or a recovery request sent by a terminal; the determining module 1302 is configured to determine other neighboring base station cells supporting the voice service if it is determined that the voice service is not supported based on the voice service request in the RRC establishment request or the recovery request; the first redirection module 1303 is configured to send a request for releasing the terminal to the core network, so that the terminal is redirected to the neighboring base station cell; the first residing module 1304 is configured to start a terminal survival detection function when the terminal completes a voice service, so that the terminal enters an RRC inactive state and resides in a preset network system corresponding to the voice service.

Fig. 14 is a second schematic structural diagram of the voice service flow control system provided in the present invention, as shown in fig. 14, including: a sending module 1401, a second redirecting module 1402, a processing module 1403, and a second residing module 1404, wherein:

the sending module 1401 is configured to send an RRC establishment request or a recovery request to the current base station; the second redirection module 1402 is configured to receive a redirection request message issued by the current base station, and access an adjacent base station cell supporting a voice service based on the redirection request message; the processing module 1403 is configured to process a voice service in the cell of the neighboring base station to be accessed; the second residing module 1404 is configured to receive, after the voice service is completed, an RRC configuration message issued by the neighboring base station cell, enter an RRC inactive state, and reside in a preset network system corresponding to the voice service.

Fig. 15 illustrates a physical structure diagram of an electronic device, and as shown in fig. 15, the electronic device may include: a processor (processor) 1510, a communication Interface (Communications Interface) 1520, a memory (memory) 1530, and a communication bus 1540, wherein the processor 1510, the communication Interface 1520, and the memory 1530 communicate with each other via the communication bus 1540. The processor 1510 may invoke logic instructions in the memory 1530 to perform a voice traffic flow control method comprising: receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal; if the voice service request in the RRC establishment request or the recovery request is judged to be not supported, other adjacent base station cells supporting the voice service are determined; sending a terminal releasing request to a core network, and redirecting the terminal to the adjacent base station cell; and after the terminal completes the voice service, starting a terminal survival detection function, enabling the terminal to enter an RRC (radio resource control) inactive state and residing in a preset network system corresponding to the voice service.

In addition, the logic instructions in the memory 1530 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, a computer can execute the voice business process control method provided by the above methods, and the method includes: receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal; if the voice service request in the RRC establishment request or the recovery request is judged to be not supported, other adjacent base station cells supporting the voice service are determined; sending a terminal releasing request to a core network, and redirecting the terminal to the adjacent base station cell; and after the terminal finishes the voice service, starting a terminal survival detection function, so that the terminal enters an RRC (radio resource control) inactive state and resides in a preset network system corresponding to the voice service.

In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the voice business process control method provided by the above methods, the method comprising: receiving a Radio Resource Control (RRC) establishment request or a recovery request sent by a terminal; if the voice service request in the RRC establishment request/recovery request is based on, judging that the voice service is not supported, and determining other adjacent base station cells supporting the voice service; sending a terminal releasing request to a core network, and redirecting the terminal to the adjacent base station cell; and after the terminal completes the voice service, starting a terminal survival detection function, enabling the terminal to enter an RRC (radio resource control) inactive state and residing in a preset network system corresponding to the voice service.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling a voice service process is characterized by comprising the following steps:

and after the terminal completes the voice service, starting a terminal survival detection function, enabling the terminal to enter an RRC (radio resource control) inactive state and residing in a preset network system corresponding to the voice service.

2. The method of claim 1, wherein the receiving the RRC connection request or the recovery request sent by the terminal comprises:

3. The voice service process control method according to claim 1, wherein the voice service request is a 4G voice service request or a 5G voice service request, and the predetermined network system is a 4G network or a 5G network.

4. A method for controlling a voice service process is characterized by comprising the following steps:

sending an RRC connection request or a recovery request to a current base station;

processing voice service when accessing the adjacent base station cell;

and after the voice service is finished, receiving an RRC configuration message issued by the adjacent base station cell, entering an RRC non-activated state, and residing in a preset network system corresponding to the voice service.

5. The method of claim 4, wherein the receiving a redirection request message from the current base station, and accessing a neighboring base station cell supporting a voice service based on the redirection request message comprises:

6. A voice service flow control system, comprising:

a determining module, configured to determine other neighboring base station cells supporting the voice service if it is determined that the voice service is not supported based on the voice service request in the RRC establishment request or the recovery request;

7. A voice service process control system, comprising:

and the second residing module is used for receiving the RRC configuration message issued by the adjacent base station cell after the voice service is finished, entering an RRC inactive state and residing in a preset network system corresponding to the voice service.

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the voice traffic flow control method according to any of claims 1 to 5 are implemented when the processor executes the program.

9. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the voice traffic flow control method according to any of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the voice traffic flow control method according to any of claims 1 to 5 when executed by a processor.