Embodiment
Of background technology; In the LTE system; Introduced high-priority service such as eMPS and IMS emergence call service, compared with general service, network has higher priority when handling eMPS and IMS emergency business; When network was in higher load condition or overload and can not keeps the connection of general service, these high-priority service still can normally be linked in the network.
In addition, for the UE that resides in the LTE system still can receive CS territory business, in the LTE system, introduced CS Fallback mechanism.
After UE initiatively initiated or receives the paging in CS territory, it is professional that UE will return back to 2G/3G system receiving circuit territory.If network is not supported the PS handoff procedure from the source base station to the target BS, behind the CS Fallback, UE will be released in the connection of LTE sub-district and reselect to Target cell, and set up the CS territory with Target cell and be connected.At this moment, UE can only receive the business in CS territory, and can not receive the business in PS territory.
According to foregoing description; If UE has had the high-priority service that activates or activating, and this moment, UE initiated the business in CS territory, had perhaps received the called of CS territory and when being redirected to the 2G/3G system; High-priority service will be terminated, and has influenced the continuity of high-priority service.In order to address this problem, the embodiment of the invention has provided the triggering reason or the content of the new CS territory service request of a kind of basis, determines whether to carry out the method for processing business that CS Fallback handles.
As shown in Figure 1, the schematic flow sheet of a kind of method for processing business that proposes for the embodiment of the invention is applied in the LTE system, and this method specifically may further comprise the steps:
Step S101, MME receive the CS territory service request of counterpart terminal equipment.
In practical application, in this step, the received CS territory service request of MME can comprise following two kinds:
(1) terminal equipment sends to Extended Service Request (lengthening service request) message of MME.
(2) MSC is through the paging request message of SGs interface to the MME transmission.
According to the type difference of CS territory service request, corresponding subsequent processing also can be distinct, specifically will in the description of subsequent step, describe.
Step S102, MME judge the current high-priority service that activates or activating that whether exists of terminal equipment.
If do not exist, execution in step S103;
If there is execution in step S104.
In concrete application scenarios; The concrete processing procedure of this step is: MME judges the current high-priority service that activates or activating that whether exists of terminal equipment according to current pairing business information record of terminal equipment and/or the pairing contextual information of terminal equipment.
In practical application; No matter which network equipment the promoter of high-priority service is; MME can have record to corresponding business information; And,, also certainly exist corresponding recorded information in the contextual information of this terminal equipment if there is the high-priority service that has activated or activated in terminal equipment; MME also can confirm the current high-priority service that has activated or activated that whether exists of this terminal equipment through the recorded information in the contextual information, and concrete employ information is for influencing protection scope of the present invention according to the judgment processing of carrying out this step.
Step S103, MME carry out CS Fallback to terminal equipment and handle according to CS territory service request.
Step S104, MME determine whether that according to the triggering reason or the content of CS territory service request terminal equipment is carried out CS Fallback to be handled.
Two kinds of type of messages among the corresponding step S101, the processing of this step also comprises following two kinds of situation accordingly:
When the CS territory service request of situation one, the counterpart terminal equipment that receives as MME is specially the Extended Service Request message that this terminal equipment sends; MME determines whether that according to the triggering reason of this CS territory service request this terminal equipment is carried out CS Fallback to be handled.
In such cases, the triggering reason of corresponding CS territory service request, specifically can confirm in the following manner:
If mode one terminal equipment is to initiate CS territory service request at Idle state, MME confirms the triggering reason of CS territory service request according to through entrained and the corresponding RRC Cause of terminal equipment information in the received message of S1 interface.
If mode two terminal equipments are to initiate CS territory service request at connected state, MME confirms the triggering reason of CS territory service request according to the Service Type information that is comprised in the Extended Service Request message.
No matter through which kind of above-mentioned mode, MME is after the triggering reason of having confirmed CS territory service request, and according to the particular type of relative trigger reason, the concrete processing of this step is divided into following several kinds of situation:
(1) be normal business procedure when triggering when MME judges the triggering reason of CS territory service request, the MME refusal is carried out CS Fallback to terminal equipment and is handled.
Wherein, normal business procedure specifically can be normal MO CS Fallback or 1xCSFallback process, also can be normal MT CS Fallback or 1xCS Fallback process.
(2) when MME judges that the triggering reason of CS territory service request is the high-priority service triggering, MME carries out CS Fallback to terminal equipment and handles.
Wherein, in above situation, high-priority service specifically comprises emergency (promptly) business or eMPLL (enhanced Multi-Level Precedence and Preemption, the multipriority of enhancing with the take the lead) business in CS territory.
It is pointed out that for above-mentioned (1) operation that the MME refusal is carried out CS Fallback processing to terminal equipment is specially:
MME sends Service Reject (service denial) message to terminal equipment, carries corresponding Reason For Denial indication information in this Service Reject message.
In concrete application scenarios; Above-mentioned Reason For Denial indication information is specially CS domaintemporarily not available (the CS territory temporarily can not be used) information, or has high-priority service and can not carry out CS Fallback and handle corresponding cause information with current.
Wherein, There is high-priority service and can not carries out CS Fallback to handle corresponding cause information can be a kind of new cause value information of presetting with current; Its concrete content can be set according to the scene needs of reality, and such variation does not influence protection scope of the present invention.
The CS territory service request of situation two, the counterpart terminal equipment that receives as MME be specially that MSC sends to paging request message that should terminal equipment the time; MME determines whether that according to whether carrying the high priority indication information in this CS territory service request this terminal equipment is carried out CS Fallback to be handled.
Processing in such cases specifically comprises following flow process:
At first, MME judges whether carry the high priority indication information in the paging request message.
If carry, MME confirms that paging request message is to be triggered by the high-priority service process, and MME confirms that terminal equipment is carried out CS Fallback to be handled, and sends the beep-page message in CS territory to terminal equipment, carries out corresponding paging operation.
And if do not carry, MME confirms that paging request message is not to be triggered by the high-priority service process, the MME refusal is carried out CS Fallback to terminal equipment and is handled.
In the application scenarios of reality, the realization flow that above-mentioned MME refusal is carried out the operation of CS Fallback processing to terminal equipment is specially:
MME sends refuse information to MSC, carries corresponding Reason For Denial indication information in the refuse information, sends the professional paging request message that is triggered in common CS territory so that MSC suspends to MME.
In concrete application scenarios; The Reason For Denial indication information is specially Mobile terminating CSFallback call rejected by the user (MT CS rollback call out by user refusal) information, or has high-priority service with current terminal equipment and can not carry out CS Fallback and handle corresponding cause information.
Wherein, There is high-priority service and can not carries out CS Fallback to handle corresponding cause information can be a kind of new cause value information of presetting with current; Its concrete content can be set according to the scene needs of reality, and such variation does not influence protection scope of the present invention.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme that the embodiment of the invention proposed; Can exist under the situation of the high-priority service that activates or activating at terminal equipment; By triggering reason or the content of MME according to the new CS territory service request of this terminal equipment that receives, confirm that whether carrying out CSFallback for this CS territory service request handles, thereby; Avoid high-priority service to be interrupted because of general service; Guarantee the continuity of high-priority service, solve when current priority is professional to conflict with CS territory service request mutually, how preferentially to guarantee the problem that high-priority service is carried out.
Below, the enforcement scene in conjunction with concrete is elaborated to the technology side that the embodiment of the invention proposed.
Corresponding aforesaid situation one, when MME had received the Extended Service Request message of UE transmission, MME judged this moment, whether UE had the high-priority service that activates or activating, like eMPS business, IMS urgency traffic etc.
If judged result is for existing, then according to the triggering reason of Extended Service Request message, the corresponding following three kinds of situation that comprise of handling:
The Extended Service Request message that situation A, UE send is to be triggered by normal MO CSFallback or 1xCS Fallback process.
Concrete triggering reason, MME can obtain through the Service Type in RRC cause in the S1 message (if UE this moment is the Extended Service Request message of initiating at Idle state) or the Extended ServiceRequest message (if UE this moment initiates Extended ServiceRequest message at connected state).
In order to prevent to cause the professional perhaps IMS emergency business of eMPS not keep after UE from returning back to the 2G/3G system; MME will not carry out the CSFallback process after receiving Extended Service Request message; But return service reject message, and carry cause#39 indication " CSdomain temporarily not available " to UE.
The Extended Service Request message that situation B, UE send is by MT CS Fallback or 1xCS Fallback.
MME judges further whether this MT course is high-priority service, and is professional like emergency or the eMLPP of CS.
If not then MME does not carry out CS Fallback process, but return service reject message, and carry cause#39 indication " CS domain temporarily not available " to UE.
If the CS process of this MT is a high-priority service, then MME will carry out CS Fallback process after receiving Extended ServiceRequest message.
Corresponding aforesaid situation two; If MME receives that the paging of the MSC that MSC transmits from the SGs interface triggers; MME need judge this moment, whether UE had the high-priority service of activation; If have, then MME further judges paging from SGs triggers whether the high priority indication is arranged (MSC sends in the paging request of MME can carry the priority indication).
If triggering, paging do not have the high priority indication; The paging that is the SGs interface is to be caused by normal CS business; Then MME returns refuse information to MSC; In refuse information, can use " Mobile terminatingCS Fallback call rejected by the user " this cause (cause value), also can define new cause again and be used to notify MSC temporarily can not use at present owing to UE has the professional CS Fallback of high priority PS call.MSC receives will in a period of time, suspend to MME behind this new cause and sends the paging request that common CS business causes.
If paging triggers the high priority indication is arranged, promptly the beep-page message of SGs interface is that high-priority service by the CS territory causes that then MME carries out normal processes, initiates the beep-page message in CS territory to UE.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme that the embodiment of the invention proposed; Can exist under the situation of the high-priority service that activates or activating at terminal equipment; By triggering reason or the content of MME according to the new CS territory service request of this terminal equipment that receives, confirm that whether carrying out CSFallback for this CS territory service request handles, thereby; Avoid high-priority service to be interrupted because of general service; Guarantee the continuity of high-priority service, solve when current priority is professional to conflict with CS territory service request mutually, how preferentially to guarantee the problem that high-priority service is carried out.
In order to realize technical scheme of the present invention, the present invention also provides a kind of MME, is applied in the LTE system, and its structural representation is as shown in Figure 2, specifically comprises:
Communication module 21 is used to receive the CS territory service request of counterpart terminal equipment;
Judge module 22 is used for when communication module 21 receives the CS territory service request of counterpart terminal equipment, judges the current high-priority service that activates or activating that whether exists of terminal equipment.
In practical application, judge module 22 specifically is used for:
According to current pairing business information record of terminal equipment and/or the pairing contextual information of terminal equipment, judge the current high-priority service that activates or activating that whether exists of terminal equipment.
Processing module 23 is used in the judged result of judge module 22 when existing, and triggering reason or content according to the received CS territory service request of communication module 21 determine whether that terminal equipment is carried out CS Fallback to be handled.
Further, processing module 23 also is used for:
In the judged result of judge module 22 when to be that terminal equipment is current exist the high-priority service that activates or activating,, terminal equipment is carried out CS Fallback handle according to the received CS territory service request of communication module 21.
In concrete application scenarios; The CS territory service request of the counterpart terminal equipment that communication module 21 is received, the Extended Service Request message that specifically comprises terminal equipment and sent, or the paging request message of the counterpart terminal equipment that sends of MSC; Processing module 23 specifically is used for:
When the CS territory service request of the received counterpart terminal equipment of communication module 21 is specially the Extended Service Request message that terminal equipment sends; According to the triggering reason of CS territory service request, determine whether that terminal equipment is carried out CS Fallback to be handled; Or,
When the CS territory service request of the received counterpart terminal equipment of communication module 21 is specially the paging request message of the counterpart terminal equipment that MSC sends; According to whether carrying the high priority indication information in the service request of CS territory, determine whether that terminal equipment is carried out CS Fallback to be handled.
Wherein, when the CS territory service request of the received counterpart terminal equipment of communication module 21 was specially the Extended Service Request message that terminal equipment sends, processing module 23 specifically was used for:
When the triggering reason of CS territory service request is a normal business procedure when triggering, refusal is carried out CS Fallback to terminal equipment and is handled;
When the triggering reason of CS territory service request was the high-priority service triggering, MME carried out CS Fallback to terminal equipment and handles;
Wherein, high-priority service comprises that specifically the emergency business in CS territory or eMPLL are professional.
Further, communication module 21 also is used for:
When processing module 23 confirms that refusal is carried out CS Fallback processing to terminal equipment, send Service Reject message to terminal equipment, carry corresponding Reason For Denial indication information in the Service Reject message;
Wherein, the Reason For Denial indication information is specially CS domain temporarily not available information, or has high-priority service and can not carry out CS Fallback and handle corresponding cause information with current.
On the other hand; When the CS territory service request of the received counterpart terminal equipment of communication module 21 is specially the paging request message of the counterpart terminal equipment that MSC sends; Processing module 23 is used for specifically judging whether paging request message carries the high priority indication information;
If carry, confirm that then paging request message is to be triggered by the high-priority service process, terminal equipment is carried out CS Fallback handle, and notifying communication module 21 is sent the beep-page message in CS territory to terminal equipment;
If do not carry; Confirm that then paging request message is not to be triggered by the high-priority service process; Refusal is carried out CS Fallback to terminal equipment and is handled; And notifying communication module 21 sends refuse information to MSC, carries corresponding Reason For Denial indication information in the refuse information, sends the professional paging request message that is triggered in common CS territory so that MSC suspends to MME;
Wherein, The Reason For Denial indication information is specially Mobile terminating CS Fallback callrejected by the user information, or has high-priority service with current terminal equipment and can not carry out CSFallback and handle corresponding cause information.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme that the embodiment of the invention proposed; Can exist under the situation of the high-priority service that activates or activating at terminal equipment; By triggering reason or the content of MME according to the new CS territory service request of this terminal equipment that receives, confirm that whether carrying out CSFallback for this CS territory service request handles, thereby; Avoid high-priority service to be interrupted because of general service; Guarantee the continuity of high-priority service, solve when current priority is professional to conflict with CS territory service request mutually, how preferentially to guarantee the problem that high-priority service is carried out.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) each implements the described method of scene to carry out the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred sketch map of implementing scene, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number is not represented the quality of implementing scene just to description.
More than disclosedly be merely several practical implementation scene of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into traffic limits scope of the present invention.