CN104918292B - A kind of service 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

Service control method and system

Technical Field

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

Background

With the maturity of LTE network technology and the accelerated progress of scale-up construction work, how to provide high-quality voice services for LTE users and ensure user service awareness becomes one of the key points for LTE network service deployment.

At present, the 2/3G network has achieved full coverage through years of operation, and the voice service of the existing 2/3G mobile user is carried in a circuit domain (CS domain) device, and has excellent voice quality. The existing LTE network only covers hot spot areas of voice and data services of some cities, the LTE network is a packet switching network, voice services of LTE users can be realized only through session services borne by IP, and connection control needs to be provided by IMS network equipment. An LTE user often crosses an LTE network and an 2/3G network in a call process, and because the LTE network and the 2/3G network have different carrying modes and connection processes for voice services, under the condition of not adopting any voice continuity guarantee technology, a voice interruption phenomenon can occur, the call continuity is damaged, and the perception of the LTE user for the voice services is influenced.

Disclosure of Invention

In view of this, to solve the existing technical problem, embodiments of the present invention provide a method, a system, and a system for controlling a service, which can ensure service continuity and improve user experience.

A method of traffic control, comprising:

when the service running in the first network meets a first preset condition, switching the running service to a second network;

and switching the running service from the second network to the third network, wherein the first parameter of the service 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 second parameter of the service when the service is running in the third network is better than the second parameter when the service is running in the second network.

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

the method specifically comprises the following steps:

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;

and transferring the voice service from the PS domain to the CS domain of the 2/3G network.

Preferably, the method further comprises: 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.

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

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.

Preferably, the transferring the voice service from the PS domain to the CS domain of the 2/3G network 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 the voice connection through the circuit domain, and the original VOIP conversation is transferred to the traditional voice.

A traffic control system comprising: 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 service running in the first network meets a first preset condition or not;

the first switching module is used for switching the running service to a second network when the judging module determines that the service running in the first network meets a 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, where a first parameter when the service is switched from the first network to the second network is better than a first parameter when the service is switched from the first network to the third network, and a second parameter when the service is operated in the third network is better than a second parameter when the service is operated in the second network.

Preferably, the determining module is specifically configured to determine whether the UE moves out of the LTE network coverage area;

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

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 further comprises 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.

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

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.

Preferably, the second switching module transfers the voice service from the PS domain of the 2/3G network to the CS domain, and specifically 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 the voice connection through the circuit domain, and the original VOIP conversation is transferred to the traditional voice.

According to the service control method and system provided by the embodiment of the invention, when the service running in the first network meets the first preset condition, the running service is switched to the second network; and switching the running service from the second network to the third network, wherein the first parameter of the service 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 second parameter of the service when the service is running in the third network is better than the second parameter when the service is running in the second network. The scheme of the embodiment of the invention can ensure the service continuity and improve the user experience.

Drawings

Fig. 1 is a schematic flow chart of a service control method according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a specific service control method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a service control system according to an embodiment of the present invention;

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

fig. 5 is a schematic diagram illustrating a general implementation flow of the PHO-ICT voice switching method according to embodiment 1 of the present invention;

fig. 6 is a schematic diagram of a network structure according to embodiment 2 of the present invention;

fig. 7 is a signaling flow diagram illustrating a process of implementing PS domain voice handover according to embodiment 3 of the present invention;

fig. 8 is a signaling flow diagram of the CS domain voice transfer process according to embodiment 4 of the present invention.

Detailed Description

In various embodiments of the invention: when the service running in the first network meets a first preset condition, switching the running service to a second network; and switching the running service from the second network to the third network, wherein the first parameter of the service 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 second parameter of the service when the service is running in the third network is better than the second parameter when the service is running in the second network.

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

step 101: when the service running in the first network meets a first preset condition, switching the running service to a second network;

step 102: and switching the running service from the second network to the third network, wherein the first parameter of the service 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 second parameter of the service when the service is running in the third network is better than the second parameter when the service is running in the second network.

Optionally, the first network is an LTE network, the second network is a PS domain of an 2/3G network, the third network is a CS domain of a 2/3G network, the service is a voice service, the first preset condition is that the UE moves out of an LTE network coverage area, the first parameter at least includes a handover speed, the second parameter at least includes a resource quantity,

as shown in fig. 2, the embodiment of the method specifically includes:

step 201: 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;

step 202: and transferring the voice service from the PS domain to the CS domain of the 2/3G network.

Optionally, the method further includes: 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.

Optionally, an embodiment of the present invention further provides a service control system accordingly, as shown in fig. 3, where the system includes: a judging module 31, a first switching module 32 and a second switching module 33; wherein,

the determining module 31 is configured to determine whether a service running in a first network meets a first preset condition;

the first switching module 32 is configured to switch the running service to the second network when the determining module 31 determines that the service running in the first network meets the first preset condition;

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

Optionally, the determining module is specifically configured to determine whether the UE moves out of the LTE network coverage area;

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

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 fig. 4, the system further includes a concurrency control module 34,

and the concurrency control module 34 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 2/3G network PS domain.

The technical solution of the present invention is further described in detail by the following specific examples.

Example 1

This embodiment describes a PHO-ICT (PS domain Handover in conjunction with IMS controlled Call Transfer) voice Handover scheme.

In this embodiment, when LTE network coverage is not complete, when an LTE user moves out of LTE coverage during a voice service, a PHO (PS Handover) is first used to quickly switch IP voice to a PS domain (existing network GPRS network) to ensure continuity of the voice service and support concurrence of data and voice services, and meanwhile, considering that 2/3G radio channel resource capacity is relatively short, and in order to protect investment in a CS domain (circuit domain), a CS domain call transfer service request is initiated to an IMS call transfer module by a terminal through a call transfer function controlled by an IMS, and IP voice in the PS domain is automatically transferred to a CS domain traditional voice under control of the IMS call transfer function, so that the user completes a call process in a 2/3G network circuit domain, thereby ensuring better voice service quality and good customer perception, while data traffic is not affected.

Fig. 5 is a schematic general implementation flow diagram of a PHO-ICT voice switching method according to embodiment 1 of the present invention, and as shown in fig. 5, the method specifically includes:

step 501: the terminal realizes the VOIP voice service based on IP bearing under the control of IMS in the LTE network;

step 502: when an LTE user moves out of an LTE coverage area in the voice service process, VOIP voice is quickly switched to a PS domain through a PHO to ensure that the continuity of the voice service is guaranteed.

Step 503, after the PHO voice switching process is completed, the terminal immediately initiates a CS domain call transfer service request to the IMS call transfer module through an ICT (IMS controlled call transfer) function, and automatically transfers the VOIP voice of the PS domain to the CS domain traditional voice under the control of the IMS call transfer function module, so as to ensure that the voice quality is guaranteed, and the user has good service perception.

As can be seen from the above description, the PHO-ICT voice switching scheme according to this embodiment implements smooth voice switching from LTE to 2/3G PS domain networks and an automated IMS call transfer function, supports concurrence of data and voice services, and well solves the continuity problem of the voice service of the LTE user in networks of different systems. The technical problems of call time extension, complex processing mechanism, data service suspension, easy failure phenomenon of switching, slow development of terminals and chips and the like in the implementation process of the related technology can be solved. In summary, the beneficial effects of the present embodiment are: the switching time delay is short, the concurrence of data and voice services is supported, the continuity of the data and voice services is accelerated, and the perception of an LTE user on the data and voice services is not influenced.

Example 2

This embodiment describes a network structure, which can implement the PHO-ICT voice switching scheme described in embodiment 1, and it should be noted that, in order to accelerate the implementation of the service flow of this scheme and make good interoperability between hardware and software devices, each device in the model of this scheme employs a standard open interface; meanwhile, in order to facilitate flexible networking of the equipment and independent function optimization and upgrading of each equipment, the model of the scheme adopts a modular design.

Fig. 6 is a schematic diagram of a network structure according to embodiment 2 of the present invention, and as shown in fig. 6, the network includes:

1. voice Call Continuity-Application Server (VCC-AS): is responsible for inter-domain transfer of voice calls and quickly establishing a new voice channel to ensure voice continuity.

2. Inter-network Transfer Function (Domain Transfer Function) module: and the VCC AS application equipment is positioned, and in the IMS Call transfer process, the voice Call is transferred from the VOIP voice state of the IMS domain to the traditional switching equipment of the CS domain, and the VCC AS application equipment is responsible for reestablishing the Call or releasing the Call.

3. A circuit domain adaptation function (CS addition function) module: and the equipment is positioned at VCC AS application equipment, and realizes the completion of the circuit domain call adaptation processing function and the number detection function after a user is switched from an LTE network to a traditional 2/3G network in the IMS call transfer process.

4. P-CSCF (proxy Call Session Control Function): the method is mainly used for receiving registration and session requests of terminal users and forwarding information related to control and bearing by proxy.

5. The I-CSCF (Interrogating Call Session control function) performs the interrogation of the subscriber subscription data and the allocation of services.

6. S-CSCF (Serving Call Session Control Function): and executing the service request of the user, and carrying out service logic processing, session connection and service triggering to the VCC AS module.

7. And the HSS (Home Subscriber Server) is mainly used for managing the subscription information and the service data of the user.

8. PCRF (Policy and Charging Rules Function): and carrying out QOS strategy, service rule and charging mode control.

9. MGCF (Media Gateway Control Function) is responsible for the conversion of application protocol, realizes the intercommunication between IMS domain and CS domain, and CSCF indirectly controls 2/3G network to carry out information interaction and call connection through MGCF.

10. All devices in the LTE core network: and the system is responsible for data and voice service connection when the LTE user is resident in the LTE network.

11. 2/3G all devices of the traditional core network: and when the LTE user moves out of the LTE network range, the fast switching of the IP voice is completed through the PS domain, and the transfer of the traditional voice service from the IP voice to the circuit domain is completed under the control of the VCC-AS.

Example 3

In embodiment 1, when an LTE user moves out of the LTE coverage during a voice service, first, a PHO is used to quickly switch VOIP voice to a PS domain (a current network GPRS network) to ensure that the continuity of the voice service is guaranteed. This embodiment describes a signaling procedure for implementing the PS domain voice handover procedure, as shown in fig. 7, the signaling procedure includes:

step 701, when an LTE user reaches an LTE network and 2/3G network boundary area in a voice service process, an LTE network wireless side eNodeB device (source base station) sends a handover request message to a Mobility Management Entity (MME) that the user originally registers.

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

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

Step 704, the target RNC allocates RAB resource and returns a redirection response (Relocation request Ack) message to the SGSN.

Step 705, the target SGSN returns a Forward relocation response (Forward redirect) message to the source MME, which contains radio side RAB information and self IP information.

Step 706, the source MME sends a Handover Command message to the source base station, informing it that the Handover preparation is completed.

And step 707, the source base station sends a HO from E-UTRONMOMMAND message to the user to indicate the user to perform handover, wherein the message contains the radio resource information established by the target RNC.

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

And 709, the user completes the switching according to the received user parameters, and the IP information transmission is continued under the target RNC, so that the continuity of the VOIP voice and the continuous transmission of the data service are ensured.

Step 710, the target RNC sends a redirection Complete (Relocation Complete) message to the target SGSN, the SGSN is informed that the user switching is completed, and the SGSN starts to prepare to receive data from the RNC and send the data to SAE-GW.

And step 711, the target SGSN sends a Forward redirection complete (Forward relocation complete) message to the source MME to inform the MME that the switching is successful.

Step 712, the source MME responds to the SGSN with a redirection Complete Ack (Relocation Complete Ack) message.

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

Step 714, SAE-GW updates PDP context field, returns Update PDP context Response message, user current IP load has been established among UE, RNC, SGSN, SAE-GW, VOIP voice is maintained.

Step 715, the user informs the target SGSN that he has registered to the new Routing Area through a Routing Area Update procedure (Routing Area Update procedure) message.

Example 4

In embodiment 1, after the user completes the PHO voice switching process, to ensure that the voice perception of the user is not affected by the shortage of the wireless bandwidth resources of the GPRS network, the terminal immediately initiates a CS domain call transfer service request to the IMS call transfer function module through an ICT (IMS controlled call transfer) function, and automatically transfers the VOIP voice of the PS domain to the CS domain traditional voice under the control of the IMS call transfer function module, so as to ensure that the user has good voice perception. This embodiment describes a signaling procedure for implementing the CS domain voice transfer procedure, as shown in fig. 8, the signaling procedure includes:

step 801: when a terminal user is switched to a GPRS network, the terminal user is registered to a circuit domain MSC through a GSM function, in order to ensure that the voice perception of the user is not influenced by the shortage of wireless bandwidth resources of the GPRS network, a Setup message is immediately initiated to the circuit domain MSC, an opposite terminal number is carried by HoserviceNo, and the automatic call initiation function of the terminal can be quickly realized by performing IMS call transfer function superposition and number configuration on the basis of 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 establishment message of the MSC, the MGCF initiates an Invite message to the IMS core network, sets the SDP information of the Invite message AS the end point information distributed on the MGW controlled by the MGCF, and finally routes the message to VCC-AS.

Step 805: VCC-AS judges that the call is a call which needs to be transferred to the circuit domain according to the number information in the switching service code message (HoServiceNo) and the current call state of the calling and the called, and simultaneously finds the original call control block information according to the calling number information, thereby finding the detailed information of the opposite terminal user who carries out VOIP call with the calling user, and sends the detailed information to the IMS core network through the re-invite message.

Step 806: the IMS core network transmits a Reinvite message to an opposite terminal user, wherein a home terminal SDP carries the endpoint information of MGW controlled by MGCF.

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

Step 808: and the 200ok message is transmitted back to the MGCF through the IMS core network, and the MGW and the media resource of the opposite-end user are established and completed.

Step 809: MGCF informs MSC that the opposite terminal user has responded through ANM message.

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

Step 811: the calling terminal returns a connect ACK response, the terminals on the two sides complete voice connection through the circuit domain, the original VOIP conversation is transferred to traditional voice, user perception is well guaranteed, and meanwhile, the high-quality voice resources of the circuit domain are well utilized.

Compared with the related art, the method provided by the embodiment of the invention can achieve the following technical effects:

1. compared with a Circuit Switched Fallback (CSFB) mode, the method can avoid the problems that call setup delay is increased in the voice Fallback process, the called user Fallback failure processing mechanism is complex, and the user has unreachable time when returning to LTE.

2. Compared with a mode of providing Voice call continuity (SRVCC) for a Single Radio frequency (Single standby) terminal, the method can avoid the problem of Voice service interruption of about 300-500MS during switching, and ensure that the switching time is controlled to about 100MS, thereby improving the customer perception and completely meeting the commercial deployment requirement; in addition, aiming at the current situation that the development of an SRVCC terminal and a chip is immature and the problems of large interference, large power consumption, large volume and high cost of a multi-mode dual-standby terminal, the embodiment of the invention can realize the rapid deployment of the LTE voice service through a soft terminal in advance; in addition, the problem of data service suspension or rate reduction caused in the SRVCC switching process or CSFB voice falling process can be solved, and a realization means is provided for concurrency and continuity of data and voice services.

3. The large-scale transformation of the existing 2/3G core network is avoided, the investment cost is saved, the continuity of data and voice services of the LTE network can be accelerated, reliable high-quality voice services are provided for LTE users in advance, and better service quality is ensured.

The modules may be implemented by a Central Processing Unit (CPU), a Digital Signal Processor (DSP), or a Programmable logic 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 present 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 (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

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 of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a system for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction system which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the 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.