CN104918292B - A business control method and system - Google Patents

Abstract

The embodiment of the invention discloses a kind of service control methods, comprising: when the business operated in first network meets the first preset condition, by the service switching being currently running to the second network；By the business being currently running from the second network switching to third network, wherein, the first parameter when the business is switched to the second network from first network is better than the first parameter when being switched to third network from first network, and second parameter of the service operation in third network is better than the second parameter when operating in the second network.The embodiment of the present invention also accordingly discloses service control system, comprising: judgment module, the first switching module and the second switching module.

Description

A business control method and system

technical field

The present invention relates to the field of mobile communication service control, in particular to a service control method and system.

Background technique

With the maturity of LTE network technology and the acceleration of scale-up construction, how to provide high-quality voice services for LTE users and ensure user service perception has become one of the key points of LTE network service deployment.

At present, our 2/3G network has achieved comprehensive coverage after years of operation. The voice services of existing 2/3G mobile users are carried on circuit domain (CS domain) equipment, with excellent voice quality. The existing LTE network only covers the hotspot areas of voice and data services in some cities. The LTE network is a packet-switched network. The voice services of LTE users can only be implemented through the session services carried by IP, and the IMS network equipment needs to provide connection control. . LTE users often cross the LTE network and the 2/3G network during a call. Because the LTE network and the 2/3G network have different bearer methods and connection processes for voice services, without adopting any voice continuity guarantee technology, There will be interruptions in the voice, which will destroy the continuity of the call, thus affecting the perception of the LTE user's voice service.

SUMMARY OF THE INVENTION

In view of this, in order to solve the existing technical problems, the embodiments of the present invention provide a service control method, system and system, which can ensure service continuity and improve user experience.

A business control method, comprising:

When the service running in the first network meets the first preset condition, switch the running service to the second network;

Switch the running service from the second network to the third network, wherein the first parameter when the service is switched from the first network to the second network is better than the first parameter when switching from the first network to the third network. A parameter, the second parameter when the service runs on the third network is better than the second parameter when the service runs on the second network.

Preferably, the first network is an LTE network, the second network is a 2/3G network PS domain, the third network is a 2/3G network CS domain, the service is a voice service, and the first network is a The preset condition is that the user equipment UE moves out of the coverage of the LTE network, the first parameter includes at least the handover speed, and the second parameter includes at least the number of resources,

Specifically, the method includes:

When the LTE user equipment moves out of the LTE coverage during the voice service process, the voice service is switched to the 2/3G network PS domain;

The voice service is transferred from the 2/3G network PS domain to the CS domain.

Preferably, the method further includes: after switching the voice service to the PS domain of the 2/3G network, supporting concurrent operation of the data service and the voice service.

Preferably, it is characterized in that the switching of the voice service to the 2/3G network PS domain includes:

The source base station sends a handover request message to the source mobility management entity MME;

The source MME sends a Forward Relocation Request (Forward Relocation Request) message to the target SGSN, including the source-side PDP context information;

The target SGSN sends a Relocation Request message to the target RNC, requesting the RNC to establish a radio network RAB resource;

The target RNC allocates RAB resources and returns a Relocation Request Ack message to the SGSN;

The target SGSN returns a Forward Relocation Response (Forward Relocation Response) message to the source MME, including the radio side RAB information and its own IP information;

The source MME sends a Handover Command (Handover Command) message to the source base station to notify it that the handover preparation is complete;

The source base station sends a handover instruction (HO from E-UTRAN Command) message to the user equipment to instruct the user to perform handover;

When the source base station is ready for redirection, it transmits the source RNC context forward (Forward SRNS Context) message to the target RNC through the source MME and the target SGSN, performs the redirection process, and completes the SRNS context transfer;

The user equipment completes the handover according to the received user parameters, and continues to transmit IP information under the target RNC;

The target RNC sends a Relocation Complete message to the target SGSN. Notifies the SGSN that the user is handed over, and the target SGSN begins to prepare to receive data from the RNC and send data to the target SAE-GW;

The target SGSN sends a Forward Relocation Complete (Forward Relocation Complete) message to the source MME to notify the source MME that the handover has been successful;

The source MME responds to the target SGSN with a Relocation Complete Ack message;

The target SGSN sends an Update PDPContext Request message to the target SAE-GW, informing the SAE-GW to manage all the current PDP contexts of the user;

The target SAE-GW updates the PDP context field and returns an Update PDP ContextResponse message;

The user equipment informs the target SGSN that it has registered with the new routing area through a routing area update procedure (Routing Area Update procedure) message.

Preferably, the transfer of the voice service from the PS domain of the 2/3G network to the CS domain includes:

The user equipment initiates a Setup message to the circuit domain MSC;

The MSC routes the call to the IMS core network via the MGCF;

The MGCF initiates an invitation message to the IMS core network, sets the SDP information of the invitation message to the endpoint information allocated on the MGW controlled by the MGCF, and finally routes the message to the VCC-AS;

VCC-AS judges that this is a call that needs to be transferred to the circuit domain according to the number information in the handover service code message (HoServiceNo) and the current call status of the calling party and the called party, and finds the original call control block information according to the calling number information. Thereby, the detailed information of the opposite end user who is in the VOIP call with the calling user is found, and sent to the IMS core network through a Reinvite message;

The IMS core network forwards a Reinvite message to the peer user, where the local SDP carries the endpoint information of the MGW controlled by the MGCF;

After receiving the re-invitation message, the peer user changes the media bearer to the MGW, and returns a 200ok message;

The 200ok message is sent back to the MGCF via the IMS core network, and the media resources of the MGW and the peer user are established;

The MGCF informs the MSC that the peer user has responded through an ANM message;

Invite the MSC to send a connect message to the initiating calling user;

The calling terminal returns a connection confirmation response, the terminals on both sides complete the voice connection through the circuit domain, and the original VOIP call is transferred to traditional voice.

A service control system, comprising: a judgment module, a first switching module and a second switching module; wherein,

The judging module is used to judge whether the service running in the first network satisfies the first preset condition;

the first switching module, configured to switch the running service to the second network when the judgment module determines that the service running in the first network satisfies the first preset condition;

The second switching module is configured to switch the running service from the second network to the third network after the running service is switched to the second network, wherein the service is switched from the first network The first parameter when going to the second network is better than the first parameter when switching from the first network to the third network, and the second parameter when the service is running on the third network is better than the second parameter when running on the second network. parameter.

Preferably, the judging module is specifically used to judge whether the UE moves out of the coverage of the LTE network;

The first switching module is specifically configured to switch the voice service to the 2/3G network PS domain when the LTE user equipment moves out of the LTE coverage during the voice service process;

The second switching module is specifically configured to transfer the voice service from the PS domain of the 2/3G network to the CS domain.

Preferably, the system also includes a concurrency control module,

The concurrency control module is configured to control and support concurrent operation of the data service and the voice service after the voice service is switched to the PS domain of the 2/3G network.

Preferably, the first switching module switches the voice service to the PS domain of the 2/3G network, specifically including:

The source base station sends a handover request message to the source mobility management entity MME;

The source MME sends a Forward Relocation Request (Forward Relocation Request) message to the target SGSN, including the source-side PDP context information;

The target SGSN sends a Relocation Request message to the target RNC, requesting the RNC to establish a radio network RAB resource;

The target RNC allocates RAB resources and returns a Relocation Request Ack message to the SGSN;

The target SGSN returns a Forward Relocation Response (Forward Relocation Response) message to the source MME, including the radio side RAB information and its own IP information;

The source MME sends a Handover Command (Handover Command) message to the source base station to notify it that the handover preparation is complete;

The source base station sends a handover instruction (HO from E-UTRAN Command) message to the user equipment to instruct the user to perform handover;

When the source base station is ready for redirection, it transmits the source RNC context forward (Forward SRNS Context) message to the target RNC through the source MME and the target SGSN, performs the redirection process, and completes the SRNS context transfer;

The user equipment completes the handover according to the received user parameters, and continues to transmit IP information under the target RNC;

The target RNC sends a Relocation Complete message to the target SGSN. Notifies the SGSN that the user is handed over, and the target SGSN begins to prepare to receive data from the RNC and send data to the target SAE-GW;

The target SGSN sends a Forward Relocation Complete (Forward Relocation Complete) message to the source MME to notify the source MME that the handover has been successful;

The source MME responds to the target SGSN with a Relocation Complete Ack message;

The target SGSN sends an Update PDP Context Request (Update PDP Context Request) message to the target SAE-GW, informing the SAE-GW to manage all the current PDP contexts of the user;

The target SAE-GW updates the PDP context field and returns an Update PDP ContextResponse message;

The user equipment informs the target SGSN that it has registered with the new routing area through a routing area update procedure (Routing Area Update procedure) message.

Preferably, the second switching module transfers the voice service from the PS domain of the 2/3G network to the CS domain, specifically including:

The user equipment initiates a Setup message to the circuit domain MSC;

The MSC routes the call to the IMS core network via the MGCF;

The MGCF initiates an invitation message to the IMS core network, sets the SDP information of the invitation message to the endpoint information allocated on the MGW controlled by the MGCF, and finally routes the message to the VCC-AS;

VCC-AS judges that this is a call that needs to be transferred to the circuit domain according to the number information in the handover service code message (HoServiceNo) and the current call status of the calling party and the called party, and finds the original call control block information according to the calling number information. Thereby, the detailed information of the opposite end user who is in the VOIP call with the calling user is found, and sent to the IMS core network through a Reinvite message;

The IMS core network forwards a Reinvite message to the peer user, where the local SDP carries the endpoint information of the MGW controlled by the MGCF;

After receiving the re-invitation message, the peer user changes the media bearer to the MGW, and returns a 200ok message;

The 200ok message is sent back to the MGCF via the IMS core network, and the media resources of the MGW and the peer user are established;

The MGCF informs the MSC that the peer user has responded through an ANM message;

Invite the MSC to send a connect message to the initiating calling user;

The calling terminal returns a connection confirmation response, the terminals on both sides complete the voice connection through the circuit domain, and the original VOIP call is transferred to traditional voice.

In the service control method and system according to the embodiment of the present invention, when the service running in the first network meets the first preset condition, the running service is switched to the second network; the running service is switched from the The second network is switched to the third network, wherein the first parameter when the service is switched from the first network to the second network is better than the first parameter when the service is switched from the first network to the third network, and the service operates in The second parameter when running on the third network is better than the second parameter when running on the second network. Through the solutions described in the embodiments of the present invention, service continuity can be guaranteed and user experience can be improved.

Description of drawings

1 is a schematic flowchart of a service control method according to an embodiment of the present invention;

2 is a schematic flowchart of a specific service control method according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a service control system according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of another service control system according to an embodiment of the present invention;

5 is a schematic flowchart of an overall implementation of the PHO-ICT voice switching method according to Embodiment 1 of the present invention;

6 is a schematic diagram of a network structure according to Embodiment 2 of the present invention;

7 is a schematic diagram of a signaling flow for implementing a PS domain voice switching process according to Embodiment 3 of the present invention;

FIG. 8 is a schematic diagram of a signaling flow of a CS domain voice transfer process according to Embodiment 4 of the present invention.

Detailed ways

In various embodiments of the present invention: when the service running in the first network satisfies the first preset condition, the running service is switched to the second network; the running service is switched from the second network Switching to a third network, wherein the first parameter when the service is switched from the first network to the second network is better than the first parameter when switching from the first network to the third network, and the service runs on the third network The second parameter when running is better than the second parameter when running on the second network.

An embodiment of the present invention proposes a service control method, as shown in FIG. 1 , the method includes:

Step 101: when the service running in the first network satisfies the first preset condition, switch the running service to the second network;

Step 102: Switch the running service from the second network to the third network, wherein the first parameter when the service is switched from the first network to the second network is better than switching from the first network to the third network The first parameter when the service runs on the third network is better than the second parameter when the service runs on the second network.

Optionally, the first network is an LTE network, the second network is a 2/3G network PS domain, the third network is a 2/3G network CS domain, the service is a voice service, and the first network The preset condition is that the user equipment UE moves out of the coverage of the LTE network, the first parameter includes at least the handover speed, and the second parameter includes at least the number of resources,

As shown in Figure 2, the method embodiment specifically includes:

Step 201: when the LTE user equipment moves out of the LTE coverage during the voice service process, the voice service is switched to the 2/3G network PS domain;

Step 202: Transfer the voice service from the PS domain of the 2/3G network to the CS domain.

Optionally, the method further includes: after switching the voice service to the PS domain of the 2/3G network, supporting concurrent operation of the data service and the voice service.

Optionally, the embodiment of the present invention also proposes a service control system accordingly. As shown in FIG. 3 , the system includes: a judgment module 31 , a first switching module 32 and a second switching module 33 ; wherein,

The judgment module 31 is used for judging whether the service running in the first network satisfies the first preset condition;

a first switching module 32, configured to switch the running service to the second network when the judgment module 31 determines that the service running in the first network satisfies the first preset condition;

The second switching module 33 is configured to switch the running service from the second network to the third network after the running service is switched to the second network, wherein the service is switched from the first network to The first parameter in the second network is better than the first parameter in switching from the first network to the third network, and the second parameter in the service running in the third network is better than the second parameter in the second network .

Optionally, the judging module is specifically configured to judge whether the UE moves out of the coverage of the LTE network;

The first switching module is specifically configured to switch the voice service to the 2/3G network PS domain when the LTE user equipment moves out of the LTE coverage during the voice service process;

The second switching module is specifically configured to transfer the voice service from the PS domain of the 2/3G network to the CS domain.

Optionally, as shown in Figure 4, the system also includes a concurrency control module 34,

The concurrency control module 34 is configured to control and support concurrent operation of the data service and the voice service after the voice service is switched to the PS domain of the 2/3G network.

The technical solutions of the present invention will be further described in detail below through specific embodiments.

Example 1

This embodiment describes a PHO-ICT (PS Handover-IMS Controlled Call Transfer) voice handover solution.

In this embodiment, when the LTE network coverage is not yet comprehensive, when the LTE user moves out of the LTE coverage during the voice service process, the IP voice is quickly switched to the PS domain through PHO (PS Handover, PS domain handover). GPRS network) to ensure the continuity of voice services and support the concurrency of data and voice services. At the same time, considering that 2/3G wireless channel resource capacity is relatively tight, and in order to protect the investment in CS domain (circuit domain), immediately Through the call transfer function controlled by the IMS, the terminal initiates a CS domain call transfer service request to the IMS call transfer module. The 3G network circuit domain completes the call process, thereby ensuring better voice service quality and good customer perception, while data services are not affected.

FIG. 5 is a schematic diagram of an overall implementation flow of the PHO-ICT voice switching method according to Embodiment 1 of the present invention. As shown in FIG. 5 , the method specifically includes:

Step 501: the terminal is in the LTE network, and realizes the VOIP voice service based on IP bearer under the control of the IMS;

Step 502: When the LTE user moves out of the LTE coverage during the voice service process, firstly, the VOIP voice is quickly switched to the PS domain through PHO, so as to ensure the continuity of the voice service.

Step 503: After the PHO voice switching process is completed, immediately through the ICT (IMS controlled call transfer) function, the terminal initiates a CS domain call transfer service request to the IMS call transfer module, and the PS domain is transferred under the control of the IMS call transfer function module. The VOIP voice is automatically transferred to the traditional voice in the CS domain to ensure that the voice quality is guaranteed, so that users have good business perception.

It can be seen from the above description that the PHO-ICT voice switching solution described in this embodiment realizes smooth voice switching from LTE to 2/3G PS domain network and automatic IMS call transfer transfer function, and supports data and voice services. Concurrent, it solves the continuity problem of LTE user voice services in different standard networks. It can avoid technical problems such as prolonged call time, complex processing mechanism, suspension of data services, easy switching failures, and slow development of terminals and chips during the implementation of related technologies. All in all, the beneficial effects of this embodiment are: the handover delay is short, the concurrency of data and voice services is supported, the continuity of data and voice services is accelerated, and the perception of data and voice services by LTE users is not affected.

Example 2

This embodiment describes a network structure, which can implement the PHO-ICT voice switching solution described in Embodiment 1. It should be noted that, in order to speed up the realization of the business process of this solution and enable good interoperability between hardware and software devices, Each device in this solution model adopts a standard open interface; at the same time, in order to facilitate the flexible networking of the device and the function optimization and upgrade of each device independently, the solution model adopts a modular design.

FIG. 6 is a schematic diagram of the network structure according to Embodiment 2 of the present invention. As shown in FIG. 6 , the network includes:

1. Voice Call Continuity-Application Server (VCC-AS): Responsible for inter-domain transfer of voice calls and rapid establishment of new voice channels to ensure voice continuity.

2. Domain Transfer Function module: It is located in the VCC AS application equipment. During the IMS call transfer process, it transfers the voice call from the VOIP voice state in the IMS domain to the traditional switching device in the CS domain, and is responsible for re-establishing the call or releasing it. Call.

3. CS Adaption function module: It is located in the VCC AS application equipment. During the IMS call transfer process, when the user switches from the LTE network to the traditional 2/3G network, the circuit domain call adaptation processing function is completed. and number detection function.

4. P-CSCF (proxy Call Session Control Function): It is mainly used to receive registration and session requests from end users, and proxy forwarding control and bearer-related information.

5. I-CSCF (Interrogating Call Session Control Function, Interrogating Call Session Control Function): Query user subscription data and allocate services.

6. S-CSCF (Serving Call Session Control Function, Serving Call Session Control Function): executes the user's service request, performs service logic processing, session connection and service triggering to the VCC AS module.

7. HSS (Home Subscriber Server): mainly manages user subscription information and service data.

8. PCRF (Policy and Charging Rules Function): Controls QOS policies, business rules and charging methods.

9. MGCF (Media Gateway Control Function): It is responsible for the conversion of application protocols and realizes the interworking between the IMS domain and the CS domain. The CSCF indirectly controls the 2/3G network for information exchange and call connection through the MGCF.

10. All devices in the LTE core network: responsible for the connection of data and voice services when LTE users reside on the LTE network.

11. All equipment in the 2/3G traditional core network: when the LTE user moves out of the LTE network range, it completes the fast handover of IP voice through the PS domain and completes the transfer of IP voice to the traditional voice service in the circuit domain under the control of VCC-AS.

Example 3

As mentioned in Embodiment 1, when an LTE user moves out of the LTE coverage during the voice service process, firstly, the VOIP voice is quickly switched to the PS domain (the existing GPRS network) through PHO to ensure the continuity of the voice service. This embodiment describes a signaling process for implementing the PS domain voice switching process. As shown in FIG. 7 , the signaling process includes:

Step 701. When the LTE user reaches the boundary area between the LTE network and the 2/3G network during the voice service process, the eNodeB device (source base station) on the wireless side of the LTE network sends a handover request to the Mobility Management Entity (MME) originally registered by the user information.

Step 702. The source MME determines that the handover request is an inter-system handover, and sends a Forward Relocation Request message to the target network SGSN (target SGSN), including all the PDP context information on the source side.

Step 703. The target SGSN sends a Relocation Request (Relocation Request) message to the target RNC, requesting the RNC to establish a radio network RAB resource.

Step 704. The target RNC allocates RAB resources and returns a redirection response (Relocation RequestAck) message to the SGSN.

Step 705. The target SGSN returns a forwarding redirection response (Forward RelocationResponse) message to the source MME, including the radio side RAB information and its own IP information.

Step 706. The source MME sends a handover command (Handover Command) message to the source base station to notify it that the handover preparation is complete.

Step 707 . The source base station sends a handover instruction (HO from E-UTRANCommand) message to the user to instruct the user to perform handover. The message includes the radio resource information established by the target RNC.

Step 708. When the redirection is ready, the source base station transmits the source RNC context forward (Forward SRNS Context) message to the target RNC through the MME and the SGSN, performs the redirection process, and completes the SRNS context transfer.

Step 709. The user completes the handover according to the received user parameters, and continues to transmit IP information under the target RNC to ensure continuity of VOIP voice and continued transmission of data services.

Step 710. The target RNC sends a Relocation Complete (Relocation Complete) message to the target SGSN to notify the SGSN that the user is handed over, and the SGSN begins to prepare to receive data from the RNC and send data to the SAE-GW.

Step 711. The target SGSN sends a forward redirection complete (Forward RelocationComplete) message to the source MME to notify the MME that the handover has been successful.

Step 712. The source MME responds to the SGSN with a Relocation Complete Ack message.

Step 713. The target SGSN sends an Update PDP Context Request (Update PDP ContextRequest) message to the SAE-GW, informing the SAE-GW to manage all the current PDP contexts of the user.

Step 714. The SAE-GW updates the PDP context field and returns an Update PDPContext Response message. The user's current IP bearer has been established between the UE, RNC, SGSN, and SAE-GW, and the VOIP voice is maintained.

Step 715. The user informs the target SGSN that he has registered with the new routing area through a Routing Area Update procedure message.

Example 4

As mentioned in Embodiment 1, after the PHO voice switching process of the user is completed, in order to ensure that the user's voice perception is not affected by the shortage of wireless bandwidth resources of the GPRS network, the terminal immediately uses the ICT (IMS-controlled call transfer) function to call the IMS. The transfer function module initiates a call transfer service request in the CS domain, and automatically transfers the VOIP voice in the PS domain to the traditional voice in the CS domain under the control of the IMS call transfer function module to ensure that users have good voice perception. This embodiment describes a signaling process for implementing the CS domain voice transfer process. As shown in FIG. 8 , the signaling process includes:

Step 801: When switching to the GPRS network, the terminal user registers to the circuit domain MSC through the GSM function. In order to ensure that the user's voice perception is not affected by the shortage of wireless bandwidth resources of the GPRS network, a Setup message is immediately sent to the circuit domain MSC. The number is carried by HoserviceNo, and the automatic call initiation function of the terminal can be quickly realized by superimposing the IMS call transfer function and configuring the number on the basis of the IMS terminal software of the existing mobile phone.

Step 802: The MSC routes the call to the IMS core network via the MGCF according to the HoServiceNo in the SETUP message.

Steps 803 and 804: After receiving the call setup message from the MSC, the MGCF initiates an Invite message to the IMS core network, sets the SDP information of the Invite message to the endpoint information allocated on the MGW controlled by the MGCF, and finally routes the message to the VCC- AS.

Step 805: VCC-AS judges that this is a call that needs to be transferred to the circuit domain according to the number information in the handover service code message (HoServiceNo) and the current call status of the calling party and the called party, and finds the original call control according to the calling number information. block information, so as to find out the detailed information of the opposite end user who has a VOIP call with the calling user, and send it to the IMS core network through a Reinvite message.

Step 806: The IMS core network forwards the Reinvite message to the opposite end user, wherein the local SDP carries the endpoint information of the MGW controlled by the MGCF.

Step 807: After receiving the Reinvite message, the peer user redirects the media bearer to the MGW, and returns a 200ok message.

Step 808: The 200ok message is transmitted back to the MGCF via the IMS core network, and the media resources of the MGW and the peer user are established.

Step 809: The MGCF notifies the MSC that the peer user has responded through an ANM message.

Step 810: The MSC sends a connect (connect) message to the originating calling user.

Step 811: The calling terminal returns a connect ACK response, the terminals on both sides complete the voice connection through the circuit domain, the original VOIP call is transferred to traditional voice, the user's perception is well guaranteed, and the high-quality voice resources in the circuit domain are greatly improved. Good use.

Compared with the related art, using the method described in the embodiment of the present invention, the following technical effects can be achieved:

1. Compared with the Circuit Switched Fallback (CSFB) method, it can avoid the increase of call setup delay in the process of voice fallback, the complexity of the called user's fallback failure processing mechanism, and the user's certain time delay when returning to LTE. unreachable problem.

2. Compared with the method of providing voice call continuity (Single Radio Voice Call Continuity, SRVCC) for a single radio (single standby) terminal, it can avoid the interruption of voice services of about 300-500MS during handover, and ensure that the handover time is controlled at about 100MS , so as to improve customer perception and fully meet the needs of commercial deployment; in addition, in view of the immature development of SRVCC terminals and chips, and the problems of large interference, large power consumption, large size and high cost of multi-mode dual-standby terminals, the present invention The embodiment can realize the rapid deployment of the LTE voice service through the soft terminal in advance; in addition, it can solve the problem of data service suspension or rate drop during the SRVCC handover process or the CSFB voice fallback process. The concurrency and continuity provided by the implementation means.

3. It avoids the large-scale transformation of the existing 2/3G core network, saves investment costs, and can speed up the realization of the continuity of data and voice services of the LTE network, provide LTE users with reliable high-quality voice services in advance, and ensure Better business quality.

The above modules may be implemented by a central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP) or a programmable logic array (Field-Programmable Gate Array, FPGA) in the electronic device.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce A system for implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising a system of instructions, the instructions The system implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (6)

1. A method for traffic control, the method comprising:

when the LTE user equipment moves out of the LTE coverage area in the voice service process, switching the voice service to 2/3G network PS domain;

transferring the voice traffic from the PS domain to the CS domain of the 2/3G network, comprising:

user equipment initiates a Setup message to a circuit domain MSC;

MSC routes the call to IMS core network via MGCF;

MGCF initiates an invite message to IMS core network, sets SDP information of the invite message AS endpoint information allocated on MGW controlled by MGCF, and finally routes the message to VCC-AS;

VCC-AS judges that the call is a call which needs to be transferred to a circuit domain according to number information in a switching service code message (HoServiceNo) and the current call state of a calling party and a called party, and simultaneously finds original call control block information according to the calling number information, thereby finding out the detailed information of an opposite terminal user carrying out VOIP call with the calling party, and sending the detailed information to an IMS core network through a re-invite message;

an IMS core network forwards a Reinvite (Reinvite) message to an opposite terminal user, wherein a home terminal SDP carries endpoint information of MGW controlled by MGCF;

after receiving the re-invitation message, the opposite end user redirects the media bearer to the MGW and returns a 200ok message;

the 200ok message is transmitted back to MGCF through IMS core network, MGW and media resource establishment of the opposite terminal user are completed;

MGCF informs MSC opposite end user response through ANM message;

then inviting the MSC to send a connection (connect) message to the initiating calling subscriber;

the calling terminal returns a connection confirmation response, the terminals on the two sides complete voice connection through the circuit domain, and the original VOIP conversation is transferred to traditional voice;

wherein a first parameter of the service switched from the LTE network to the PS domain of the 2/3G network is better than a first parameter of the service switched from the LTE network to the CS domain of the 2/3G network, a second parameter of the service operated in the CS domain of the 2/3G network is better than a second parameter of the service operated in the PS domain of the 2/3G network, the first parameter at least comprises the switching speed, and the second parameter at least comprises the resource quantity.

2. The method of claim 1, further comprising: and after the voice service is switched to the PS domain of the 2/3G network, the concurrent operation of the data service and the voice service is supported.

3. The method according to claim 1 or 2, wherein the switching the voice traffic to the PS domain of the 2/3G network comprises:

a source base station sends a switching request message to a source mobility management entity MME;

a source MME sends a Forward redirection Request (Forward redirection Request) message to a target SGSN, wherein the Forward redirection Request message contains context information of a source side PDP;

the target SGSN sends a redirection Request (Relocation Request) message to the target RNC, and requests the RNC to establish radio network RAB resources;

target RNC distributes RAB resource, and returns redirection response (Relocation Request Ack) message to SGSN;

the target SGSN returns a Forward Relocation Response (Forward Relocation Response) message to the source MME, wherein the Forward Relocation Response message comprises radio side RAB information and self IP information;

the source MME sends a Handover Command (Handover Command) message to the source base station to inform the source base station that the Handover preparation is completed;

a source base station sends a HO from E-UTRAN Command message to user equipment to indicate a user to switch;

when the source base station is ready for redirection, a Forward SRNS Context message is transmitted to a target RNC through a source MME and a target SGSN, the redirection process is executed, and the SRNS Context transfer is completed;

the user equipment completes switching according to the received user parameters and continues to transmit IP information under the target RNC;

target RNC sends redirection Complete (Relocation Complete) message to target SGSN, notifying SGSN user switching completion, target SGSN starts to prepare for receiving data from RNC, and sends data to target SAE-GW;

the target SGSN sends a Forward redirection Complete (Forward redirection Complete) message to the source MME to inform the source MME that the switching is successful;

the source MME responds to the target SGSN through a redirection completion acknowledgement (Relocation Complete Ack) message;

target SGSN sends Update PDP Context Request message to target SAE-GW to inform SAE-GW to manage all current PDP contexts of user;

the target SAE-GW updates the PDP context field and returns an Update PDP context response (Update PDP context response) message;

the user equipment notifies the target SGSN that it has registered to the new Routing Area through a Routing Area Update procedure (Routing Area Update procedure) message.

4. A traffic control system, characterized in that the system comprises: the device comprises a judging module, a first switching module and a second switching module; wherein,

the judging module is used for judging whether the UE moves out of the LTE network coverage area;

the first switching module is used for switching the voice service to 2/3G network PS domain when the LTE user equipment moves out of the LTE coverage area in the voice service process;

the second switching module is configured to transfer the voice service from the 2/3G network PS domain to the CS domain after the voice service is switched to the 2/3G network PS domain, and includes:

user equipment initiates a Setup message to a circuit domain MSC;

MSC routes the call to IMS core network via MGCF;

MGCF initiates an invite message to IMS core network, sets SDP information of the invite message AS endpoint information allocated on MGW controlled by MGCF, and finally routes the message to VCC-AS;

VCC-AS judges that the call is a call which needs to be transferred to a circuit domain according to number information in a switching service code message (HoServiceNo) and the current call state of a calling party and a called party, and simultaneously finds original call control block information according to the calling number information, thereby finding out the detailed information of an opposite terminal user carrying out VOIP call with the calling party, and sending the detailed information to an IMS core network through a re-invite message;

an IMS core network forwards a Reinvite (Reinvite) message to an opposite terminal user, wherein a home terminal SDP carries endpoint information of MGW controlled by MGCF;

after receiving the re-invitation message, the opposite end user redirects the media bearer to the MGW and returns a 200ok message;

the 200ok message is transmitted back to MGCF through IMS core network, MGW and media resource establishment of the opposite terminal user are completed;

MGCF informs MSC opposite end user response through ANM message;

then inviting the MSC to send a connection (connect) message to the initiating calling subscriber;

the calling terminal returns a connection confirmation response, the terminals on the two sides complete voice connection through a circuit domain, and the original VOIP conversation is transferred to traditional voice, wherein a first parameter when the service is switched from the LTE network to the 2/3G network PS domain is superior to a first parameter when the service is switched from the LTE network to the 2/3G network CS domain, a second parameter when the service operates in the 2/3G network CS domain is superior to a second parameter when the service operates in the 2/3G network PS domain, the first parameter at least comprises switching speed, and the second parameter at least comprises resource quantity.

5. The system of claim 4, further comprising a concurrency control module,

and the concurrency control module is used for controlling and supporting the concurrent operation of the data service and the voice service after the voice service is switched to the PS domain of the 2/3G network.

6. The system according to claim 4 or 5, wherein the first handover module is configured to handover the voice service to the PS domain of the 2/3G network, and specifically comprises:

a source base station sends a switching request message to a source mobility management entity MME;

a source MME sends a Forward redirection Request (Forward redirection Request) message to a target SGSN, wherein the Forward redirection Request message contains context information of a source side PDP;

the target SGSN sends a redirection Request (Relocation Request) message to the target RNC, and requests the RNC to establish radio network RAB resources;

target RNC distributes RAB resource, and returns redirection response (Relocation Request Ack) message to SGSN;

the target SGSN returns a Forward Relocation Response (Forward Relocation Response) message to the source MME, wherein the Forward Relocation Response message comprises radio side RAB information and self IP information;

the source MME sends a Handover Command (Handover Command) message to the source base station to inform the source base station that the Handover preparation is completed;

a source base station sends a HO from E-UTRAN Command message to user equipment to indicate a user to switch;

when the source base station is ready for redirection, a Forward SRNS Context message is transmitted to a target RNC through a source MME and a target SGSN, the redirection process is executed, and the SRNS Context transfer is completed;

the user equipment completes switching according to the received user parameters and continues to transmit IP information under the target RNC;

target RNC sends redirection Complete (Relocation Complete) message to target SGSN, notifying SGSN user switching completion, target SGSN starts to prepare for receiving data from RNC, and sends data to target SAE-GW;

the target SGSN sends a Forward redirection Complete (Forward redirection Complete) message to the source MME to inform the source MME that the switching is successful;

the source MME responds to the target SGSN through a redirection completion acknowledgement (Relocation Complete Ack) message;

target SGSN sends Update PDP Context Request message to target SAE-GW to inform SAE-GW to manage all current PDP contexts of user;

the target SAE-GW updates the PDP context field and returns an Update PDP context response (Update PDP context response) message;

the user equipment notifies the target SGSN that it has registered to the new Routing Area through a Routing Area Update procedure (Routing Area Update procedure) message.