WO2017166291A1

WO2017166291A1 - Communication method, terminal, base station, and mobility management equipment

Info

Publication number: WO2017166291A1
Application number: PCT/CN2016/078323
Authority: WO
Inventors: 林铌忠; 庞伶俐; 郑潇潇
Original assignee: 华为技术有限公司
Priority date: 2016-04-01
Filing date: 2016-04-01
Publication date: 2017-10-05
Also published as: CN108029073A

Abstract

A communication method, terminal, base station, and mobility management equipment. The communication method comprises: a terminal transmits to a base station a capability indication message indicative of the terminal supporting a voice service in a first network and a data service in a second network; the terminal receives from the base station a voice service establishment indication message instructing the terminal to perform a voice service in the first network, and maintain a current service state in the second network; the terminal maintains the current service state in the second network and performs the voice service in the first network, one the basis of the voice service establishment indication message. The invention can increase voice service quality while ensuring transmission efficiency of a data service.

Description

Communication method, terminal, base station and mobility management device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a communication method, a terminal, a base station, and a mobility management device.

Background technique

Long Term Evolution (LTE) is a mainstream next-generation broadband wireless communication technology. The LTE network architecture adopts a unified Packet Switch (PS) architecture, which no longer supports the circuit switching (CS) voice solution of the traditional Universal Mobile Telecommunications System (UMTS). In order to achieve the performance level of the voice service in the LTE network, there are mainly a voice switch based on Circuit Switched Fallback (CSFB) and a voice solution based on dual standby terminals.

In the CSFB-based voice solution, the terminal resides in the LTE network, and when the voice service is required, the circuit domain of the UMTS Terrestrial Radio Access Network (UTRAN) that is switched from LTE to UMTS is re-accessed, and The voice service is received according to the service initiation process of the circuit domain. At this time, if the data service of the packet domain is being performed in the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) of the LTE network, the data service of the packet domain is also switched to the UTRAN. If the UTRAN does not support the data service of the packet domain, the data service of the packet domain is suspended, which affects the transmission efficiency of the packet domain data service.

Summary of the invention

The embodiments of the present invention provide a communication method, a terminal, a base station, and a mobility management device to improve voice service quality on the premise of ensuring data transmission efficiency.

In a first aspect, a communication method is provided. When the voice service of the terminal is switched to the first network, the service state of the terminal in the second network is maintained. When the terminal needs to perform data service, the second network is still used. Data services to ensure the transmission efficiency of terminal data services. The method may be implemented in the following manner: the terminal sends capability indication information to the base station, and the capability indication information refers to The terminal supports the joint operation of the voice service and the data service, and the base station determines to send a voice service creation indication to the terminal to instruct the terminal to perform voice service in the first network and maintain the current service state in the second network. information. The terminal receives the voice service creation indication information sent by the base station, and maintains the current service state in the second network according to the voice service creation indication information, and performs the voice service in the first network.

In the embodiment of the present invention, the first network may be a GSM network or a UMTS network, and the second network may be an LTE network.

In the embodiment of the present invention, the joint operation of the voice service and the data service refers to performing voice service in the first network, and performing data service on the second network or in the second network.

The maintaining the current service state in the second network in the embodiment of the present invention means that if the RRC state of the terminal is in the idle state, it continues to camp on the second network; if the RRC state of the terminal is in the connected state, the data transmission is not maintained. Interrupted.

In a possible design, the base station determines to send voice service creation indication information to the terminal in different manners:

In a possible implementation manner, the voice service creation indication information is determined by the base station by using the capability indication information and indication information that is sent by the mobility management device to the base station to indicate that a CSFB operation is performed. . Specifically, the base station receives the capability indication information sent by the user side device and the indication information sent by the mobility management device to indicate that the CSFB operation is performed. And the determining, by the base station, the voice service creation indication information to the terminal by using the capability indication information and the indication information that is sent by the mobility management device to indicate that the CSFB operation is performed.

In another possible implementation, the voice service creation indication information is determined by the base station by using the mobility management device to send indication information for performing a voice service and a data service joint operation to the base station. . Specifically, after the terminal sends the capability indication information to the base station, the capability indication information is transparently transmitted to the mobility management device by the base station. The mobility management device receives the capability indication information that is transparently transmitted by the base station and is sent by the terminal, and sends indication information for indicating a joint operation of the voice service and the data service to the base station according to the capability indication information. The base station receives the joint operation sent by the mobility management device for indicating voice service and data service And the indication information that is sent by the mobility management device is used to indicate that the voice service and the data service are jointly operated, and the voice service creation indication information is sent to the terminal.

Optionally, the base station may send the voice service creation indication information by using different message forms according to the RRC state of the terminal in the second network. If the RRC state of the user in the second network is an idle state, the voice service creation indication information includes, but is not limited to, an RRC connection release message. If the RRC state of the terminal in the second network is a connection state, the voice service creation indication information includes not limited to an RRC reconfiguration message.

Optionally, the mobility management device may send, according to the RRC state of the terminal in the second network, the indication information used to indicate the joint operation of the voice service and the data service. If the service status of the terminal in the second network is an idle state, the indication information used to indicate the joint operation of the voice service and the data service may include, but is not limited to, an initial context setup request message. If the RRC state of the terminal in the second network is the connection state, the indication information for indicating the joint operation of the voice service and the data service may include, but is not limited to, a user context modification request message.

In another possible design, different implementation manners are adopted to ensure that paging messages of subsequent voice services are accessed through the second network:

In a possible implementation manner, after receiving the voice service creation indication information, the terminal sends paging access indication information to the MSC, where the paging access indication information is used to indicate that the MSC passes the second network to The terminal sends a voice service paging message.

Optionally, the paging access indication information is an indication cell included in the NAS message; or the paging access indication information is a connection management service request.

In another possible implementation manner, after the terminal receives the voice service creation indication information, the terminal determines to end the joint tracking area update in the case that the voice service is performed on the UMTS network.

In a second aspect, a communication method is provided in which a terminal transmits data service data through a first network through a part of a module of a second network together with a part of a module of the first network. Specifically, in the embodiment of the present invention, when the terminal performs data services, the RLC layer of the second network needs to be separately configured. And the RLC layer in the first network, that is, two RLCs are configured. In the embodiment of the present invention, the RLC layer of the second network is configured to perform a segmentation cascading function, and the RLC layer in the first network is configured to perform an encryption function. The terminal accesses the radio access network of the second network through the second network, and performs data service transmission through the communication interface between the first network radio access network and the radio access network of the second network to ensure data. The transmission efficiency of the business.

In a third aspect, a terminal is provided, and the terminal has a function for implementing a terminal in the design of the foregoing method, and the function may be implemented by using hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The modules can be software and/or hardware.

In a possible design, the terminal comprises a transmitting unit, a receiving unit and a processing unit. The sending unit is configured to send the capability indication information to the base station, where the capability indication information is used to indicate that the terminal supports the joint operation of the voice service and the data service, where the combined operation of the voice service and the data service refers to the first The voice service is performed in the network, and the data service is performed on the second network or on the second network. The receiving unit is configured to receive voice service creation indication information that is sent by the base station, where the voice service creation indication information is used to indicate that the terminal performs voice service in the first network, and maintains the current service in the second network. status. The processing unit is configured to maintain the current service state in the second network according to the voice service creation indication information received by the receiving unit, and perform the voice service in the first network.

In another possible design, the terminal comprises a processor, a transmitter and a receiver, the processor being configured to support the terminal to perform a corresponding function in the above method. The transmitter is configured to support the foregoing terminal to send capability indication information for indicating that the terminal supports voice service and data service joint operation to the base station. The receiver is configured to support receiving voice service creation indication information sent by the base station. The terminal can also include a memory for coupling with the processor that retains program instructions and data necessary for the terminal.

A fourth aspect provides a base station, where the base station has a function of implementing a base station in the foregoing method design, and the function may be implemented by using hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The module can be software and / Or hardware.

In a possible design, the base station includes a processing unit and a transmitting unit. The processing unit is configured to determine that the voice service creation indication information is sent to the terminal, where the voice service creation indication information is used to indicate that the terminal performs voice service in the first network, and maintains the current service state in the second network. The sending unit is configured to send, to the terminal, the voice service creation indication information that is determined by the processing unit.

In another possible design, the base station includes a processor and a communication unit, the processor being configured to support a base station to perform a corresponding function in the above method. The processor is configured to determine, according to the capability indication information and the indication information used by the mobility management device to indicate that the CSFB operation is performed, to send a voice service creation indication information to the terminal or according to the mobility management device. The indication information sent to indicate the joint operation of the voice service and the data service determines that the voice service creation indication information is sent to the terminal. The communication unit is configured to support communication with the terminal and the mobility management device. The base station can also include a memory for coupling with the processor that stores the necessary program instructions and data for the base station.

The base station in the embodiment of the present invention may be a device for providing a wireless communication function for a terminal in a radio access network, such as an evolved Node B (abbreviated as a base station or an eNodeB).

In a fifth aspect, a mobility management device is provided, and the mobility management device has a function of implementing a mobility management device in the foregoing method design, and the function may be implemented by using hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The modules can be software and/or hardware.

In a possible design, the mobility management device includes a receiving unit and a sending unit. The receiving unit is configured to receive the capability indication information sent by the terminal, where the capability indication information is used to indicate that the terminal supports the joint operation of the voice service and the data service, where the combined operation of the voice service and the data service refers to the first The voice service is performed in the network, and the data service is performed on the second network or on the second network. The sending unit is configured to send, according to the capability indication information received by the receiving unit, indication information for indicating a joint operation of the voice service and the data service to the base station.

In another possible design, the mobility management device includes a receiver and a transmitter, The receiver is configured to receive capability indication information transparently transmitted by the base station and sent by the terminal; the transmitter is configured to send, according to the capability indication information, a base station to indicate a joint operation of the voice service and the data service Instructions. The mobility management device may further include a processor and a memory, the memory saves program instructions and data necessary for the mobility management device to perform a corresponding function, and the processor coupled to control the receiver and the transmitter to perform corresponding The function.

The mobility management device in the embodiment of the present invention may be a Mobility Management Entity (MME).

In a sixth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the terminal, which includes a program involved in executing the terminal in the above aspect.

In a seventh aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use by the base station, including a program involved in performing the foregoing aspects of the base station.

In an eighth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the mobility management device, including a program involved in executing the mobility management device.

The communication method, the terminal, the base station, and the mobility management device provided by the embodiments of the present invention can improve the quality of the voice service under the premise of ensuring the high-speed data service, so as to achieve the dual purposes of ensuring the quality of the voice service and ensuring the efficiency of the data service.

DRAWINGS

1 is a structural diagram of a communication system to which a communication method is applied according to an embodiment of the present invention;

2 is a flowchart of an implementation of a voice service that needs to be handed over to a UMTS network by a UE according to an embodiment of the present invention;

FIG. 3 is a flowchart of another implementation of a voice service that needs to be handed over to a UMTS network by a UE according to an embodiment of the present invention;

FIG. 4 is a flowchart of still another implementation of a voice service that needs to be handed over to a UMTS network by a UE according to an embodiment of the present invention;

FIG. 5 is a flowchart of still another implementation of a voice service that needs to be handed over to a UMTS network by a UE according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a communication process of transmitting, by using some modules in an eNB of an LTE network, together with some modules in a UMTS network RNC, and transmitting data service data through an SGSN in a UMTS network according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a specific implementation process of transmitting, by using a part of a module in an eNB of an LTE network, together with a part of a module in a UMTS network RNC, and transmitting data service data through an SGSN in a UMTS network according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a mobility management device according to an embodiment of the present disclosure;

FIG. 13 is another schematic structural diagram of a mobility management device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings in the embodiments of the present invention.

With the development of communication technologies, communication systems have evolved into communication architectures as shown in FIG. As shown in FIG. 1 , in the communication system, the UE uses a UMTS Terrestrial Radio Access Network (UTRAN) and a Mobile Service Switch Center (MSC) and a general packet radio service (General Packet Radio). Service, GPRS) Serving GPRS Support Node (SGSN) for communication, UE through Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and Mobility Management Entity (MME) And the Serving Gateway (S-GW) communicates. An SGs interface is configured between the MSC in the UMTS network and the MME in the LTE network, and the SGs interface can implement the UE in the UMTS network and the LTE network. The voice business between the networks is continuous.

At present, the LTE network can provide high data service transmission efficiency for the UE. However, the performance of the voice service in the LTE network is still slightly lacking. Therefore, to improve the voice service quality of the UE in the LTE network, the SGs can be adopted. The interface switches the voice service of the UE to a UMTS network or a Global System for Mobile communications (GSM) network, and performs voice services through the UMTS network or the GSM network.

The embodiment of the present invention provides a communication method, in which the service state of the terminal in the second network is maintained when the voice service of the terminal is switched to the first network, and the second network is still used when the terminal needs to perform data service. Perform data services to ensure the transmission efficiency of terminal data services. The method may be implemented in the following manner: the terminal sends the capability indication information to the base station, where the capability indication information indicates that the terminal supports the joint operation of the voice service and the data service, and the base station determines to send the terminal to the terminal to indicate that the terminal is in the first A voice service creation indication message that performs a voice service in the network and maintains a current service state in the second network. The terminal receives the voice service creation indication information sent by the base station, and maintains the current service state in the second network according to the voice service creation indication information, and performs the voice service in the first network.

It should be noted that the terminal in the embodiment of the present invention may include various handheld devices, wireless devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms of users. User Equipment (UE), mobile station (MS), terminal equipment (Terminal Equipment), and the like. The following is a description of the convenience of the terminal as a UE.

The base station in the embodiment of the present invention is a device deployed in a radio access network to provide a wireless communication function for a terminal. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In a system using different radio access technologies, the name of the base station may be different. For example, in an LTE network, an evolved NodeB (evolved NodeB, eNB or eNodeB for short) is used in the third generation 3G network. Medium, called Node B (Node B) and so on. The following is a description of the convenience of the base station as an eNB.

It should be further noted that the description of the embodiments of the present invention and the claims and the drawings relate to And the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or order, for example, the first network and the second network involved in the above embodiments of the present invention are only It is used to facilitate the description and to distinguish different networks, and does not constitute a limitation on the network. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the invention described herein can be implemented in a sequence other than those illustrated or described herein.

In the embodiment of the present invention, the first network may be a GSM network or a UMTS network, and the second network may be an LTE network. The following uses the first network as the UMTS network and the second network as the LTE network as an example.

The following is an example of the handover of the voice service of the UE to the UMTS network. The signaling procedure in the process of implementing the handover of the voice service of the UE to the UMTS network is applicable to the implementation process of switching the voice service of the UE to the GSM network. The process of implementing the handover of the voice service of the UE to the GSM network is not described in detail in the embodiments of the present invention.

In the embodiment of the present invention, in order to prevent the UE from switching to the GSM network or the UMTS network to perform voice services, the data service transmission efficiency of the UE is affected. In a possible implementation manner, when the voice service of the UE is switched to the GSM network or the UMTS network, The service state of the UE in the LTE network is maintained. When the UE needs to perform data services, the data service is still performed through the LTE network to ensure the transmission efficiency of the UE data service. In another possible implementation manner, when the voice service of the UE is switched to the GSM network or the UMTS network, the connection between the UE and the radio access network in the LTE network is maintained, and when the UE needs to perform data service, the evolved type through the LTE network Some modules in the base station (evolved NodeB, eNB) and part of the radio network controller (RNC) in the UMTS network transmit data service data to ensure the transmission efficiency of the UE data service.

Embodiments of the Present Invention The above two implementation manners will be separately described below in conjunction with actual applications.

The embodiment of the present invention first describes how to implement the service state of the UE in the LTE network when the voice service of the UE is switched to the UMTS network.

FIG. 2 is a flowchart of an implementation of a voice service that needs to be handed over to a UMTS network for a UE that accesses or camps on an LTE network according to an embodiment of the present invention.

S101: The UE that accesses or camps on the LTE network receives the voice service paging sent by the MSC. interest.

S102: The UE sends an Extended Service Request (ESP) to the MME to request voice service in the UMTS network.

S103: The UE sends the capability indication information to the eNB, where the capability indication information is used to indicate that the UE supports the voice service and the data service joint operation.

In the embodiment of the present invention, the joint operation of the voice service and the data service refers to performing voice service in a UMTS network or a GSM network, and performing data service on the LTE network or on the LTE network.

In a possible implementation manner, the capability indication information may be sent by using a notification message, where the notification message is used to notify the eNB that the UE supports voice service in a UMTS network, and supports data in an LTE network camp or an LTE network. business. In another possible implementation manner, the capability indication information may be sent by using a request message, where the request message is used to request voice service in a UMTS network, and perform data service on an LTE network or on an LTE network.

For example, the UE determines to be in the UMTS network and the LTE network coverage according to the current coverage situation, or the UE determines that the eNB supports the voice service and the data service joint operation by reading the broadcast message, and then determines that the voice service may be requested in the UMTS network and is in the LTE network. Hosting or performing data service, and then sending a request message to the eNB to request voice service in the UMTS network, and performing data service on the LTE network or in the LTE network, and receiving the request message by the eNB, determining that the UE supports Perform voice services in a UMTS network and support data services in an LTE network camp or an LTE network.

The execution order of the steps S102 and S103 is in no particular order.

S104: The MME receives the extended service request sent by the UE, and sends indication information for instructing to perform the CSFB operation to the eNB.

In the embodiment of the present invention, the RRC (Radio Resource Control) state of the UE in the LTE network may be an idle state or a connected state.

The MME may send the indication information indicating that the CSFB operation is performed according to the RRC state of the UE in the LTE network. In a possible implementation manner, the UE is in LTE The RRC state in the network is an idle state, and the indication information for indicating that the CSFB operation is performed may include, but is not limited to, an initial context setup request message. The MME carries the indication information for indicating the CSFB operation in the initial context setup request message sent by the eNB, and after receiving the initial context setup request message, the eNB returns a context setup response message to the MME if the CSFB operation is triggered. .

In another possible implementation manner, the RRC state of the UE in the LTE network is a connection state, and the indication information used to indicate that the CSFB operation is performed may include, but is not limited to, a user context modification request message. The MME carries the indication information for indicating the CSFB operation in the user context modification request message sent to the eNB, and after receiving the user context modification request message, the eNB returns a context modification response message to the MME if the CSFB operation is triggered. .

S105: The eNB determines to send the voice service creation indication information to the UE according to the UE capability indication information that is sent by the UE to the eNB and the indication information that the MME sends to the eNB to indicate the CSFB operation.

The voice service creation indication information in the embodiment of the present invention is used to indicate that the UE performs voice service in the UMTS network, and maintains the current service state in the LTE network. The maintaining the current service state in the LTE network means that if the RRC state of the UE in the LTE network is an idle state, the UE continues to camp on the LTE network and remains idle, for example, the UE listens for paging messages in the LTE network. The system broadcasts the message, performs the mobility measurement, and the like; if the RRC state of the UE in the LTE network is the connected state, the UE continues to maintain the data service transmission state in the LTE network.

In short, the maintaining the current service state in the LTE network in the embodiment of the present invention means that if the RRC state of the UE is in the idle state, the UE continues to camp on the LTE network; if the RRC state of the UE is in the connected state, the UE remains The data transmission is not interrupted.

In the embodiment of the present invention, according to the RRC state of the UE in the LTE network, the eNB may send the voice service creation indication information to the UE in different message forms. In a possible implementation manner, the RRC state of the UE in the LTE network is an idle state, and the voice service creation indication information includes, but is not limited to, a Radio Resource Control (RRC) connection release message (RRC connection release). In another possible implementation manner, the RRC state of the UE in the LTE network is a connection. The voice service creation indication information includes not limited to an RRC reconfiguration message.

S106: The UE receives the voice service creation indication information sent by the eNB, maintains the current service state in the LTE network, completes the voice service establishment process in the UMTS network, and performs the voice service.

In the embodiment of the present invention, after receiving the voice service creation indication information, the UE maintains the current service state in the LTE network and initiates a voice service in the UMTS network. During the establishment of the voice service in the UMTS network, the UE does not send a Routing Area Update (RAU) message, that is, the data service is not performed in the UMTS network, and the current service state can be maintained in the LTE network. The paging message of the data service is sent from the LTE network.

In the method implementation process shown in FIG. 2, the voice service creation indication information is determined by the eNB by using the capability indication information and indication information that is sent by the MME to the eNB to indicate that a CSFB operation is performed. In the embodiment of the present invention, the MME may also send the indication information for indicating the joint operation of the voice service and the data service to the eNB, where the eNB determines the voice service creation indication information according to the voice service and the data service joint operation indication information.

FIG. 3 is a flowchart of another implementation of a voice service that needs to be handed over to a UMTS network for a UE that accesses or camps on an LTE network according to an embodiment of the present invention. The steps S201, S202, and S206 in the method flow shown in FIG. 3 are the same as the steps S101, S102, and S106 in the method implementation flow shown in FIG. 2, respectively, and the differences are as follows.

S203: The UE sends capability indication information to the MME.

In the embodiment of the present invention, the UE may transparently transmit the capability indication information to the MME by using the eNB, that is, after the UE sends the capability indication information to the eNB, the eNB transparently transmits the capability indication information to the MME.

In the embodiment of the present invention, the UE may carry the capability indication information in an Extended Service Request message sent to the MME.

It should be noted that the execution order of S202 and S203 in the embodiment of the present invention is in no particular order.

Optionally, the UE may also request the MME to perform a joint operation of the voice service and the data service.

S204: The MME requests a joint operation of the voice service and the data service based on the UE, or is based on the UE. The capability indication information that supports the joint operation of the voice service and the data service determines that the UE can be triggered to perform the voice service and the data service joint operation, and then the indication information for indicating the joint operation of the voice service and the data service can be sent to the eNB.

The MME may send the indication information for indicating a joint operation of the voice service and the data service in different message forms according to the RRC state of the UE in the LTE network. In a possible implementation manner, the service state of the UE in the LTE network is an idle state, and the indication information for indicating a joint operation of the voice service and the data service may be sent by, but not limited to, an initial context setup request message. The MME, in the initial context setup request message sent to the eNB, carries the indication information for indicating a joint operation of the voice service and the data service, and after receiving the initial context setup request message, the eNB supports triggering the voice service and the data service. The joint operation then replies to the MME with a context establishment response message.

In another possible implementation manner, the RRC state of the UE in the LTE network is a connection state, and the indication information for indicating a joint operation of the voice service and the data service may be sent by, but not limited to, a user context modification request message. The MME, in the user context modification request message sent to the eNB, carries the indication information for indicating a joint operation of the voice service and the data service, and after receiving the user context modification request message, the eNB supports triggering the voice service and the data service. The joint operation then replies to the MME with a User Context Modification Response message.

S205: The eNB receives the indication information that is sent by the MME to indicate that the voice service and the data service are jointly operated, and sends the voice service creation indication information to the UE.

The voice service creation indication information is still used to indicate that the terminal performs voice service in the UMTS network and maintains the current service state in the LTE network.

The voice service creation indication information sent by the eNB in the embodiment S205 is similar to the voice service creation indication information in the process S105 shown in FIG. 2, except that the voice service creation indication information is sent by the MME for indicating The indication information of the joint operation of the voice service and the data service is determined.

In the embodiment of the present invention, after receiving the voice service creation indication information, the UE maintains the current service state in the LTE network and initiates a voice service in the UMTS network. UE in UMTS network During the process of establishing a voice service in the network, the RAU message is not sent, that is, the data service is not performed in the UMTS network, and the paging message of the data service is delivered from the LTE network.

Optionally, in the embodiment of the present invention, the UE switches to the UMTS network to perform the voice service, but the UE still maintains the service state in the LTE network, and the paging message for ensuring the subsequent voice service is accessed through the LTE network. In a possible implementation manner, the UE may send paging access indication information to the MSC, where the paging access indication information is used to instruct the MSC to send a voice service paging to the UE by using the LTE network. Message. In another possible implementation manner, if the UE determines that the voice service in the UMTS network ends, the UE may trigger a Combined Tracking Area Update (TAU) process.

The foregoing embodiment of the present invention is applicable to the method of the method shown in FIG. 2 and FIG. The process is schematically illustrated by way of example.

FIG. 4 is a flow chart showing another implementation of a voice service that needs to be handed over to a UMTS network by a UE in an LTE network according to an embodiment of the present invention. The steps S301, S302, S303, S304, S305, and S306 in the method flow shown in FIG. 4 are the same as the steps S201, S202, S203, S204, S205, and S206 in the method flow shown in FIG. 3, and details are not described herein again. The differences are as follows.

S307: The UE sends the paging access indication information to the MSC, where the paging access indication information is used to instruct the MSC to send a voice service paging message to the UE by using the LTE network.

In the embodiment of the present invention, the paging access indication information may be an indication cell included in a non-access stratum (NAS) message; or the paging access indication information may be a connection management service request ( Connect management service request, CM service request).

FIG. 5 is a flowchart of still another implementation of a UE that accesses or camps on an LTE network and needs to switch to a UMTS network for voice service according to an embodiment of the present invention. The steps S401, S402, S403, S404, S405, and S406 in the method flow shown in FIG. 5 are the same as the steps S201, S202, S203, S204, S205, and S206 in the method flow shown in FIG. 3, and details are not described herein again. The differences are as follows.

S407: The UE determines that the voice service in the UMTS network has ended.

S408: The UE triggers the combined TAU, so that the MSC sends a voice service paging message to the UE by using the LTE network.

In the embodiment of the present invention, a combined TAU request is sent to the MME, where the combined TAU procedure is used to notify the MSC UE to camp on the LTE network, and subsequently send a voice service paging message to the UE through the LTE network.

The specific implementation of the combined TAU process in the embodiment of the present invention may be performed by using the existing combined TAU process, that is, the UE sends a TAU request to the MME, and the MME sends a location update request to the MSC, and the MSC sends a location update response to the MME. Instructing the MSC to send a voice service paging message to the UE through the LTE network. The difference is that the combined TAU process in the embodiment of the present invention is triggered by the UE performing the joint operation of the voice service and the data service after determining that the voice service in the joint operation of the voice service and the data service ends.

The flow of the communication method shown in FIG. 4 and FIG. 5 can ensure that the paging message of the subsequent voice service of the UE is accessed through the LTE network.

The communication method provided by the embodiment of the present invention is different from the traditional CSFB operation in that the UE maintains the current service state in the LTE network, and if the data service needs to be performed, the data service, that is, the UE data, can be performed in the LTE network. The service does not switch to the UMTS network, and it can avoid the problem of suspended or data transmission efficiency caused by the data service being switched to the UMTS network.

The embodiment of the present invention describes in detail the implementation manner in which the UE transmits data service data through the SGSN in the UMTS network through a part of the module in the eNB of the LTE network together with some modules in the UMTS network RNC.

In the embodiment of the present invention, part of the module in the eNB that implements the UE through the LTE network, together with some modules in the UMTS network RNC, transmits data service data through the SGSN in the UMTS network, and needs to be in the U-UTRAN of the UMTS network UTRAN and the LTE network. Establish a communication interface. FIG. 6 is a schematic diagram of a communication over-architecture of transmitting data service data by an SGSN in a UMTS network by using a part of modules in a eNB of an LTE network, together with some modules in a UMTS network RNC, according to an embodiment of the present invention. As shown in FIG. 6, the UE accesses the E-UTRAN of the LTE network through LTE-Uu, and communicates with the E-UTRAN of the LTE network through the UMTS network UTRAN. The signaling interface performs data service transmission to implement the transmission efficiency of the data service of the UE in the UMTS network.

It should be noted that, in FIG. 6, the uplink data flow direction is taken as an example, and the flow direction of the downlink data may be reversed.

In the embodiment of the present invention, when the UE performs the data service, the radio link control (RLC) layer of the eNB included in the LTE network E-UTRAN and the RLC layer of the RNC in the UMTS network are respectively configured, that is, two configurations are configured. RLC. In the embodiment of the present invention, the RLC layer of the eNB is configured to perform a segmentation cascading function, and the RLC layer in the RNC is configured to perform an encryption function.

Specifically, when the eNB is configured in the embodiment of the present invention, the configuration parameter is required according to the quality of service (QoS) requirement of the data service of the UE. When the RLC layer in the RNC is configured, in order to save overhead, the unacknowledged mode (UM) mode may be adopted in the UMTS network to complete data transmission of the data service by using a serial number (SN).

FIG. 7 is a schematic diagram of a specific implementation process of transmitting data service data by using an SGSN in a UMTS network by using a part of a module in an LTE network and a part of a module in a UMTS network RNC provided by an embodiment of the present invention. As shown in FIG. 7, the UE accesses the E-UTRAN of the LTE network through the physical layer (PHY), the Medium Access Control (MAC) layer, and the RLC layer of the eNB, instead of the PHY of the NB. The layer and the MAC layer access the network. The RLC layer in the eNB mainly performs the segmentation and concatenation function on the data of the data service, and the eNB does not perform the Packet Data Convergence Protocol (PDCP) process. The data of the data service is transmitted to the RLC layer in the RNC through the communication interface between the UMTS network UTRAN and the E-UTRAN of the LTE network, and the RLC layer of the RNC encrypts and decrypts the data of the data service, and then the RNC performs PDCP processing on the data of the data service. . The data of the data service processed by the RNC is transmitted through the SGSN and the GGSN.

The partial module in the eNB of the LTE network provided by the embodiment of the present invention, together with the partial module in the RNTS network RNC, transmits the data service data through the SGSN in the UMTS network, and can realize the use of the high-speed data service. The UMTS network performs voice services to achieve the dual purpose of ensuring the quality of voice services and ensuring the efficiency of data service transmission.

It should be noted that the communication method for transmitting data service data through the SGSN in the UMTS network is not only applicable to the voice service and the partial module in the eNB of the LTE network provided by the foregoing embodiment of the present invention, together with the partial module in the UMTS network RNC. The scenario of joint operation of data services can also be applied to scenarios where data services exist separately.

Based on the communication method provided by the foregoing embodiment, the embodiment of the present invention further provides a terminal 100. FIG. 8 is a schematic structural diagram of a terminal 100 according to an embodiment of the present invention. As shown in FIG. 8, the terminal 100 provided by the embodiment of the present invention includes a sending unit 101, a receiving unit 102, and a processing unit 103.

The sending unit 101 is configured to send the capability indication information to the base station, where the capability indication information is used to indicate that the terminal 100 supports the joint operation of the voice service and the data service, where the combined operation of the voice service and the data service refers to being in the first network. Perform voice services and perform data services on the second network or on the second network.

The receiving unit 102 is configured to receive the voice service creation indication information that is sent by the base station, where the voice service creation indication information is used to indicate that the terminal 100 performs voice service in the first network, and maintains the current service in the second network. status.

The processing unit 103 is configured to maintain the current service state in the second network according to the voice service creation indication information received by the receiving unit 102, and perform the voice service in the first network.

Optionally, the voice service creation indication information is determined by the base station by using the capability indication information and the circuit domain fallback CSFB operation indication information, where the CSFB operation indication information is sent by the mobility management device to the base station. .

Optionally, the sending unit 101 is further configured to transparently transmit the capability indication information to the mobility management device by using the base station after sending the capability indication information to the base station.

The voice service creation indication information is determined by the base station by using voice service and data service joint operation indication information, where the voice service and data service joint operation indication information is sent by the mobility management device to the base station of.

The service state of the terminal 100 in the second network is an idle state, and the voice service creation indication information includes a radio resource control RRC connection release message.

The service state of the terminal 100 in the second network is a service connection state, and the voice service creation indication information includes a radio resource control RRC reconfiguration message.

In a possible implementation, the sending unit 101 is further configured to send paging access indication information to the mobile switching center MSC after the receiving unit 102 receives the voice service creation indication information. The paging access indication information is used to instruct the MSC to send a voice service paging message to the terminal 100 by using the second network.

Optionally, the paging access indication information is an indication cell included in a non-access stratum NAS message, or the paging access indication information is a connection management service request.

In another possible implementation manner, the processing unit 103 is further configured to: after the receiving unit 102 receives the voice service creation indication information, and determine to end the voice service in the first network, trigger the joint tracking area. Update.

FIG. 9 is a schematic structural diagram of another terminal 100 according to an embodiment of the present invention. As shown in FIG. 9, the terminal 100 provided by the embodiment of the present invention adopts a general computer system structure, including a processor 1001, a memory 1002, a receiver 1003, and a transmitter 1004. The program code for executing the solution of the present invention is stored in the memory 1002, and Execution is controlled by the processor 1001.

In the embodiment of the present invention, the processor 1001 is configured to support the terminal to perform a corresponding function in the foregoing method. The transmitter 1004 is configured to support the foregoing terminal to send capability indication information for indicating that the terminal supports voice service and data service joint operation to the base station. The receiver 1003 is configured to support receiving voice service creation indication information sent by the base station.

The embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the terminal 100, and includes a program related to the terminal 100 for performing the above aspect.

It is to be understood that the terminal 100 of this embodiment may be used to implement all the functions of the terminal involved in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and details are not described herein again.

Based on the communication method provided by the foregoing embodiment, the embodiment of the present invention further provides a base station 200. FIG. 10 is a schematic structural diagram of a base station 200 according to an embodiment of the present invention. As shown in FIG. 10, the base station 200 includes a processing unit 201 and a sending unit 202.

The processing unit 201 is configured to determine that the voice service creation indication information is sent to the terminal, where the voice service creation indication information is used to indicate that the terminal performs voice service in the first network, and maintains the current service state in the second network.

The sending unit 202 is configured to send, to the terminal, the voice service creation indication information that is determined by the processing unit 201.

The processing unit 201 determines, by using the following manner, that the voice service creation indication information is sent to the terminal: the capability indication information and the indication information sent by the mobility management device to indicate the CSFB operation are determined, and the voice is sent to the terminal. Business creation instructions.

The capability indication information is sent by the terminal. The capability indication information is used to indicate that the terminal supports voice service and data service joint operation, where the voice service and the data service joint operation refer to performing voice service in the first network, and camping on the second network or The second network conducts data services. The indication information of the CSFB operation is sent by the mobility management device.

The processing unit 201 determines, by using the following manner, that the voice service creation indication information is sent to the terminal: the indication information sent by the mobility management device for indicating the joint operation of the voice service and the data service is determined. The voice service and the data service joint operation are sent by the mobility management device, and the indication information used to indicate the joint operation of the voice service and the data service is that the mobility management device is transparently transmitted by the base station 200. The capability indication information sent by the terminal is determined by the information.

The service status of the terminal in the second network is an idle state, and the indication information for indicating a joint operation of the voice service and the data service includes an initial context setup request message.

The service status of the terminal in the second network is a service connection status, and the indication information used to indicate that the voice service and the data service are jointly performed includes a context modification request message.

FIG. 11 is a schematic diagram showing another structure of a base station 200 according to an embodiment of the present invention. As shown in FIG. 11, the base station 200 includes a processor 2001 and a communication unit 2002.

In the embodiment of the present invention, the processor 2001 is configured to support a base station to perform a corresponding function in the foregoing method. The processor 2001 is configured to determine to send to the terminal according to the capability indication information and the indication information sent by the mobility management device for indicating that the CSFB operation is performed. The voice service creation indication information or the indication information for indicating the joint operation of the voice service and the data service sent by the mobility management device determines that the voice service creation indication information is sent to the terminal. The communication unit 2002 is configured to support communication with the terminal and the mobility management device.

The base station 200 can also include a memory 2003 for coupling with the processor 2001, which stores the necessary program instructions and data for the base station.

The embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the base station 200, and includes a program related to the base station 200 for performing the above aspect.

It is to be understood that the base station 200 of the present embodiment can be used to implement all the functions of the base station involved in the foregoing method embodiments. For the specific implementation process, reference may be made to the related description of the foregoing method embodiments, and details are not described herein again.

Based on the communication method provided by the foregoing embodiment, the embodiment of the present invention further provides a mobility management device 300. FIG. 12 is a schematic structural diagram of a mobility management device 300 according to an embodiment of the present invention. As shown in FIG. 12, the mobility management device 300 includes a receiving unit 301 and a sending unit 302.

The receiving unit 301 is configured to receive the capability indication information sent by the terminal. The capability indication information is used to indicate that the terminal supports the voice service and the data service joint operation, where the voice service and the data service joint operation are in the first network. Perform voice services and perform data services on the second network or on the second network.

The sending unit 302 is configured to send, according to the capability indication information received by the receiving unit 301, indication information for indicating a joint operation of the voice service and the data service.

FIG. 13 is a schematic diagram showing another structure of the mobility management device 300 according to an embodiment of the present invention. As shown in FIG. 13, the mobility management device 300 includes a receiver 3001 and a transmitter 3002.

In the embodiment of the present invention, the receiver 3001 is configured to receive the transparent transmission by the base station and by the terminal The capability indication information sent by the terminal. The transmitter 3002 is configured to send, to the base station, indication information for indicating a joint operation of the voice service and the data service according to the capability indication information.

The mobility management device 300 may further include a processor 3003 and a memory 3004 that stores program instructions and data necessary for the mobility management device 300 to perform respective functions, and is coupled to the processor 3003 to control the receiver 3001. The transmitter 3002 performs a corresponding function.

The embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the mobility management device 300, and includes a program related to the mobility management device 300 for performing the above aspects.

It can be understood that the mobility management device 300 of the present embodiment can be used to implement all the functions of the mobility management device involved in the foregoing method embodiments, and the specific implementation process can refer to the related description of the foregoing method embodiments, and Narration.

It should be noted that the above-mentioned bus in the embodiment of the present invention may include a path for transmitting information between various components of the computer.

The processor can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention. One or more memories included in the computer system, which may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) Or other types of dynamic storage devices that can store information and instructions, or disk storage. These memories are connected to the processor via a bus.

Communication units, receivers, and transmitters can use devices such as any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like.

A memory, such as a RAM, holds an operating system and a program for executing the inventive scheme. The operating system is a program that controls the running of other programs and manages system resources.

One of ordinary skill in the art can understand all or part of the steps in the method of implementing the above embodiments. The processor may be instructed to execute by a program, and the program may be stored in a computer readable storage medium, which is a non-transitory medium, such as a random access memory, a read only memory, Flash memory, hard disk, solid state hard disk, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

The present invention has been described with reference to the respective flowcharts and block diagrams of the method and apparatus of the embodiments of the invention. It will be understood that each flow and block of the flowchart illustrations. FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. A device that implements the functions specified in one or more blocks of a flowchart or a plurality of flows and block diagrams.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A communication method, comprising:

The terminal sends the capability indication information to the base station, where the capability indication information is used to indicate that the terminal supports the voice service and the data service joint operation, where the voice service and the data service joint operation refer to the voice service in the first network, and The second network resides or performs data services on the second network;

The terminal receives the voice service creation indication information sent by the base station, where the voice service creation indication information is used to indicate that the terminal performs voice service in the first network, and maintains the current service state in the second network;

And the terminal maintains a current service state in the second network according to the voice service creation indication information, and performs the voice service in the first network.
The method according to claim 1, wherein the voice service creation indication information is determined by the base station by the capability indication information and the circuit domain fallback CSFB operation indication information, wherein the CSFB operation indication information is a mobile The sex management device sends to the base station.
The method according to claim 1, wherein after the terminal sends the capability indication information to the base station, the method further includes:

Transmitting, by the base station, the capability indication information to the mobility management device;

The voice service creation indication information is determined by the base station by using voice service and data service joint operation indication information, where the voice service and data service joint operation indication information is sent by the mobility management device to the base station of.
The method according to any one of claims 1 to 3, wherein the service state of the terminal in the second network is an idle state;

The voice service creation indication information includes a radio resource control RRC connection release message.
The method according to any one of claims 1 to 3, wherein the service state of the terminal in the second network is a service connection state;

The voice service creation indication information includes a radio resource control RRC reconfiguration message.
Method according to any of claims 1 to 5, characterized in that said terminal receives speech After the voice service creates the indication information, the method further includes:

The terminal sends paging access indication information to the mobile switching center MSC, where the paging access indication information is used to instruct the MSC to send a voice service paging message to the terminal through the second network.
The method according to claim 6, wherein the paging access indication information is an indication cell included in a non-access stratum NAS message; or

The paging access indication information is a connection management service request.
The method according to any one of claims 1 to 5, wherein after the terminal receives the voice service creation indication information, the method further includes:

The terminal determines to end the joint tracking area update in the case that the first network performs the voice service.
A communication method, comprising:

The base station determines to send the voice service creation indication information to the terminal, where the voice service creation indication information is used to indicate that the terminal performs the voice service in the first network, and maintains the current service state in the second network;

The base station sends the voice service creation indication information to the terminal.
The method of claim 9, wherein the determining, by the base station, that the voice service creation indication information is sent to the terminal comprises:

The base station receives the capability indication information sent by the terminal, where the capability indication information is used to indicate that the terminal supports the joint operation of the voice service and the data service, where the joint operation of the voice service and the data service refers to being performed in the first network. Voice service, and the data service is carried in the second network or in the second network;

Receiving, by the base station, indication information that is sent by the mobility management device to indicate that the CSFB operation is performed;

And the determining, by the base station, the voice service creation indication information to the terminal by using the capability indication information and the indication information that is sent by the mobility management device to indicate that the CSFB operation is performed.
The method of claim 9 wherein said base station determines to send to the terminal Voice service creation indication information, including:

The base station receives the indication information that is sent by the mobility management device to indicate the joint operation of the voice service and the data service, where the indication information used to indicate the joint operation of the voice service and the data service is that the mobility management device passes The base station transparently transmits and is determined by the capability indication information sent by the terminal;

The base station determines, by using the indication information that is sent by the mobility management device to indicate a joint operation of the voice service and the data service, to send the voice service creation indication information to the terminal.
The method according to claim 11, wherein the service state of the terminal in the second network is an idle state;

The indication information for indicating a joint operation of the voice service and the data service includes an initial context setup request message.
The method according to claim 11, wherein the service status of the terminal in the second network is a service connection status;

The indication information for indicating a joint operation of the voice service and the data service includes a context modification request message.
A communication method, comprising:

The mobility management device receives the capability indication information sent by the terminal, where the capability indication information is used to indicate that the terminal supports the voice service and the data service joint operation, where the voice service and the data service joint operation refer to performing voice in the first network. Business, and the data service is carried in the second network or in the second network;

The mobility management device sends, according to the capability indication information, indication information for indicating a joint operation of the voice service and the data service to the base station.
The method according to claim 14, wherein the service state of the terminal in the second network is an idle state;

The indication information for indicating a joint operation of the voice service and the data service includes an initial context setup request message.
The method of claim 14 wherein said terminal is in said second network The business status in the middle is the business connection status;

The indication information for indicating a joint operation of the voice service and the data service includes a context modification request message.
A terminal, comprising:

a sending unit, configured to send the capability indication information to the base station, where the capability indication information is used to indicate that the terminal supports the joint operation of the voice service and the data service, where the combined operation of the voice service and the data service refers to performing voice in the first network. Business, and the data service is carried in the second network or in the second network;

a receiving unit, configured to receive voice service creation indication information sent by the base station, where the voice service creation indication information is used to indicate that the terminal performs voice service in the first network, and maintains a current service state in the second network;

The processing unit is configured to maintain the current service state in the second network according to the voice service creation indication information received by the receiving unit, and perform the voice service in the first network.
The terminal according to claim 17, wherein the voice service creation indication information is determined by the base station by using the capability indication information and the circuit domain fallback CSFB operation indication information, where the CSFB operation indication information is a mobile The sex management device sends to the base station.
The terminal according to claim 17, wherein the sending unit is further configured to transparently transmit the capability indication information to the mobility management device by using the base station after transmitting the capability indication information to the base station;

The voice service creation indication information is determined by the base station by using voice service and data service joint operation indication information, where the voice service and data service joint operation indication information is sent by the mobility management device to the base station of.
The terminal according to any one of claims 17 to 19, wherein the service state of the terminal in the second network is an idle state;

The voice service creation indication information includes a radio resource control RRC connection release message.
The terminal according to any one of claims 17 to 19, wherein the service state of the terminal in the second network is a service connection state;

The voice service creation indication information includes a radio resource control RRC reconfiguration message.
The terminal according to any one of claims 17 to 21, wherein the sending unit is further configured to: after the receiving unit receives the voice service creation indication information, send a paging access indication to the mobile switching center MSC. information;

The paging access indication information is used to instruct the MSC to send a voice service paging message to the terminal by using the second network.
The terminal according to claim 22, wherein the paging access indication information is an indication cell included in a non-access stratum NAS message; or

The paging access indication information is a connection management service request.
The terminal according to any one of claims 17 to 21, wherein the processing unit is further configured to: after the receiving unit receives the voice service creation indication information, and determine to end the voice service in the first network. In the case, the joint tracking area update is triggered.
A base station, comprising:

a processing unit, configured to send a voice service creation indication information to the terminal, where the voice service creation indication information is used to indicate that the terminal performs a voice service in the first network, and maintains a current service state in the second network;

And a sending unit, configured to send, to the terminal, the voice service creation indication information that is determined by the processing unit.
The base station according to claim 25, wherein the processing unit determines to send the voice service creation indication information to the terminal in the following manner:

Receiving the capability indication information sent by the terminal, where the capability indication information is used to indicate that the terminal supports the voice service and the data service joint operation, where the voice service and the data service joint operation refer to performing voice service in the first network. And performing data services on the second network or on the second network;

Receiving indication information sent by the mobility management device to indicate that the CSFB operation is performed;

And determining, by the capability indication information and the indication information sent by the mobility management device to indicate that the CSFB operation is performed, the sending of the voice service creation indication information to the terminal.
The base station according to claim 25, wherein the processing unit determines to send the voice service creation indication information to the terminal in the following manner:

Receiving, by the mobility management device, indication information for indicating a joint operation of the voice service and the data service, where the indication information for indicating a joint operation of the voice service and the data service is that the mobility management device transparently transmits by the base station And determined by the capability indication information sent by the terminal;

And determining, by using the indication information sent by the mobility management device to indicate a joint operation of the voice service and the data service, sending the voice service creation indication information to the terminal.
The base station according to claim 27, wherein the service state of the terminal in the second network is an idle state;

The indication information for indicating a joint operation of the voice service and the data service includes an initial context setup request message.
The base station according to claim 27, wherein the service state of the terminal in the second network is a service connection state;

The indication information for indicating a joint operation of the voice service and the data service includes a context modification request message.
A mobility management device, comprising:

a receiving unit, configured to receive the capability indication information sent by the terminal, where the capability indication information is used to indicate that the terminal supports the joint operation of the voice service and the data service, where the combined operation of the voice service and the data service refers to being performed in the first network. Voice service, and the data service is carried in the second network or in the second network;

And a sending unit, configured to send, according to the capability indication information received by the receiving unit, indication information for indicating a joint operation of the voice service and the data service.
The mobility management device according to claim 30, wherein the service state of the terminal in the second network is an idle state;

The indication information for indicating a joint operation of the voice service and the data service includes an initial context setup request message.
The mobility management device according to claim 30, wherein the service state of the terminal in the second network is a service connection state;

The indication information for indicating a joint operation of the voice service and the data service includes a context modification request message.