CN102215569A - Circuit switched fall back (CSFB) process notification method and device - Google Patents
Circuit switched fall back (CSFB) process notification method and device Download PDFInfo
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- CN102215569A CN102215569A CN2010101496650A CN201010149665A CN102215569A CN 102215569 A CN102215569 A CN 102215569A CN 2010101496650 A CN2010101496650 A CN 2010101496650A CN 201010149665 A CN201010149665 A CN 201010149665A CN 102215569 A CN102215569 A CN 102215569A
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Abstract
The invention discloses a circuit switched fall back (CSFB) process notification method, which comprises the following steps of: receiving an initial context setup request message carrying a CSFB indicator; and replying an initial context setup fail message of which the carried contents comprise CSFB cells. The invention also discloses another CSFB process notification method, which comprises the following steps of: receiving a service request message comprising the CSFB indicator; transmitting the initial context setup request message carrying the CSFB indicator to a base station; and receiving the initial context setup fail message of which the carried contents comprise the CSFB cells, and keeping a user context. The invention also discloses a device corresponding to the method. In the method and the device, after the base station receives the CSFB indicator, an enhanced-radio access bearer (E-RAB) is not needed to be established; therefore, CSFB time delay can be reduced, and probable system resource waste is avoided; and the conflict of an E-RAB identifier (ID) on the required cells in the initial context setup fail message can be avoided.
Description
Technical field
The present invention relates to the communications field, particularly circuit domain dropping CSFB flow process Notification Method and device.
Background technology
CSFB (Circuit Switched Fall Back, circuit domain dropping) be a kind of at LTE (Long TermEvolution, Long Term Evolution) use other RAN (Radio Access Network Radio Access Network) to support CS territory (Circuit Switched Domain in the system coverage area, circuit domain) Tong Hua technology, the CSFB flow process can be so that user's CS business, for example speech business, all transfer to the access network of relatively low bandwidth, GSM for example, WCDMA etc., thus the bandwidth resources of operator can be saved.The applicant finds in realizing process of the present invention: in the CSFB flow process of prior art, when replying initial context foundation response Initial Context Setup Response message, must carry one in the message at least and set up good E-RAB (Enhanced-Radio Access Bear ID, the enhancing RAB) sign ID, if base station eNodeB was waited for and successfully set up the time-delay of returning INITIAL CONTEXTSETUP RESPONSE message again behind the E-RAB then causing CSFB this moment, and cause the flow process of setting up E-RAB to waste resource; Just do not return INITIAL CONTEXT SETUP RESPONSE message behind the E-RAB if do not wait to have set up, then can't fill in E-RAB ID wherein.
Summary of the invention
The embodiment of the invention provides a kind of circuit domain dropping CSFB flow process Notification Method, comprising:
Receive initial context and set up request message, carry the CSFB indication in the described message;
Reply failure of establishing initial context message, carry the cell that content comprises CSFB in the described failure of establishing initial context message.
Another embodiment of the present invention provides another kind of circuit domain dropping CSFB flow process Notification Method, comprising:
Reception comprises the service request information of CSFB indication;
Send the initial context that carries the CSFB indication to the base station and set up request message;
The failure of establishing initial context Initial Context Setup Fail message that content comprises the CSFB cell is carried in reception, and keeps user's context.
Another embodiment of the present invention also provides a kind of circuit domain dropping CSFB flow process notifying device, comprising:
Initial context is set up request receiver module 310, is used to receive the initial context that carries the CSFB indication and sets up request message;
Failure of establishing initial context is replied module 320, is used to reply failure of establishing initial context message, and carries the cell that content comprises CSFB in this message.
Another embodiment of the present invention provides another kind of circuit domain dropping CSFB flow process notifying device, comprising: service request receiver module 410 is used to receive the service request information that comprises the CSFB indication;
Initial context is set up request message sending module 420, is used for sending the initial context that carries the CSFB indication to the base station and sets up request message;
Failure of establishing initial context message sink module 430 is used to receive and carries content and comprise the failure of establishing initial context message of CSFB cell and continue to keep user's context.
In the method and apparatus that the embodiment of the invention provides, E-RAB need not be set up in the base station after the indication of receiving CSFB, thereby can reduce the time delay of CSFB, also avoided setting up E-RAB but switch at once or discharge the resource waste that may bring; By in Initial Context Setup Fail message, carrying the cell notice MME of CSFB, can avoid the conflict of E-RAB ID in Initial Context Setup Response message on the other hand for filling out cell.
Description of drawings
Fig. 1 is the method flow diagram of the embodiment of the invention;
Fig. 2 is the method flow diagram of another embodiment of the present invention;
Fig. 3 is the device schematic diagram of the embodiment of the invention;
Fig. 4 is the device schematic diagram of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention one provides a kind of circuit domain dropping CSFB flow process Notification Method, comprising:
S110 receives initial context and sets up request Initial Context Setup Request message, carries the CSFB indication in the described message
After user equipment (UE) receives CS paging CS Paging message, if judge it is paging oneself, then can be by base station eNodeB and MME (Mobile Management Entity, mobile management entity) sets up link, and pass through this link to MME transmission service request Service Request message, in message, comprise the CSFB indication, be CS fallback indication, MME can set up initial context by indication eNodeB after receiving Service Request message, indication CS fallback indication in the Initial Context Setup Request message that sends to eNodeB, eNodeB receives the initial context that carries described CSFB indication and sets up request message.
S120 replys failure of establishing initial context Initial Context Setup Fail message, carries the cell that content comprises CSFB in the message
After eNodeB receives Initial Context Setup Request message, reply Initial Context SetupFail message, comprise CSFB in the cell of message, thereby can notify MME eNodeB starting the CSFB flow process.MME receives and can not think failure of establishing initial context after the Initial Context Setup Fail message that carries above special cell, but continues to keep the context of user in core net, waits for follow-up CSFB flow process.
In the embodiments of the invention, in Initial Context Setup Fail message, carry content and comprise that the mode of CSFB cell can have multiple, for example, can be in the S1AP protocol message of existing S1 interface (interface between eNodeB and the core net MME), for example the Cause cell in the Initial Context Setup Fail message increases enumerated value CSFB activity newly, and is specifically as shown in table 1:
| IE/Group?Name | Presence | Rang e | IE?Type?and?Reference | Semantics Descriptio n |
| CHOICE?Cause Group | M | |||
| ＞Radio Network?Layer |
| ＞＞Radio Network Layer?Cause | M | ENUMERATED (Unspecified， TX2 RELOCOverall Expiry， Successful Handover， Release due to E-UTRAN Generated Reason， Handover Cancelled，Partial Handover，Handover Failure In Target EPC/eNB Or Target System， Handover Target not allowed， TS1 RELOCoverall Expiry， TS1 RELOCprep Expiry， Cell not available，， Unknown Target ID， No Radio Resources Available in Target Cell，Unknown or already allocated MME UE S1AP ID， Unknown or already allocated eNB UE S1AP ID， Unknown or inconsistent pair of UE S1AP ID，Handover desirable for radio reasons， Time critical handover， Resource optimisation handover， Reduce load in serving cell，User inactivity， Radio Connection With UE Lost，Load Balancing TAU Required，CS Fallback Triggered， UE Not Available For PS Service，Radio resources not available， Failure in the Radio Interface Procedure， Invalid QoS combination，Inter-RAT redirection， Interaction with other procedure，Unknown E-RAB ID， Multiple E-RAB ID instances，Encryption and/or integrity protection algorithms not supported，S1 intra system Handover triggered，S1 inter system Handover triggered， X2 Handover triggered ...， Redirection towards 1xRTT， Not supported QCI value， invalid CSG Id) | ||
| ＞Transport Layer |
| ＞＞Transport Layer?Cause | M | ENUMERATED (Transport?Resource?Unavailable， Unspecified， ...) | ||
| ＞NAS | ||||
| ＞＞NAS Cause | M | ENUMERATED(Normal?Release， Authentication?failure， Detach， Unspecified， ...，CSFB?activity，) | ||
| ＞Protocol | ||||
| ＞＞Protocol Cause | M | ENUMERATED (Transfer Syntax Error， Abstract Syntax Error(Rejact)， Abstract Syntax Error(lgnore and Notify)， Message not Compatible with Receiver State， Semantic Error， Abstract Syntax Error(Falsely Constructed Message)， Unspecified，...) | ||
| ＞Misc | ||||
| ＞＞Miscellan eous?Cause | M | ENUMERATED (Control Processing Overload，Not enough User Plane Processing Resources， Hardware Failure， | ||
| O&M?Intervention，Unspecified，Unknown?PLMN，...) |
Table 1
Perhaps can also for example increase cell CS Fallback Indicator in the Initial Context Setup Fail message newly at the S1AP of S1 interface protocol message, specifically as shown in table 2:
| IE/Group?Name | Presence | Range | IE?type?and reference | Semantics description | Criticality | Assigned Criticality |
| Message?Type | M | 9.2.1.1 | YES | reject | ||
| MME?UE?S1AP?ID | M | 9.2.3.3 | YES | ignore | ||
| eNB?UE?S1AP?ID | M | 9.2.3.4 | YES | ignore | ||
| Cause | M | 9.2.1.3 | YES | ignore | ||
| Criticality?Diagnostics | O | 9.2.1.21 | YES | ignore | ||
| CS?Fallback?Indicator | O | - | YES | ignore |
Table 2
Certainly, the present invention is not limited to above-mentioned two kinds of alter modes, the indication of CSFB cell also is not limited to CSFB activity or these two kinds of forms of CS Fallback Indicator, this cell can also in existing message structure, carry other cells in other positions, as long as can represent that eNodeB is starting the CSFB flow process.
In the present embodiment, eNodeB need not set up E-RAB after the indication of receiving CSFB, thereby can reduce the time delay of CSFB, also avoided setting up E-RAB but switch at once or discharge the resource waste that may bring; By in Initial Context Setup Fail message, carrying the cell notice MME of CSFB, can avoid the conflict of E-RAB ID in Initial Context Setup Response message on the other hand for filling out cell.The method that present embodiment provides can realize in base station side.
In the circuit domain dropping CSFB flow process Notification Method that another embodiment of the present invention provides,, can also comprise after the S120 as a kind of additional project:
S130 initiates to switch, and UE is switched to target access system
ENodeB can directly initiate to switch between system after replying Initial Context Setup Fail message, and UE is switched to target access system, for example GSM or WCDMA etc., and UE can insert in target access system again, and sets up voice link.It is to be noted, the circuit domain dropping CSFB flow process Notification Method that provides for the embodiment of the invention, this step is not a necessary procedure, and those skilled in the art also can expect having other executive mode or implementation, do not constitute for qualification of the present invention.
Another embodiment of the present invention provides another kind of circuit domain dropping CSFB flow process Notification Method, comprising:
S210 receives the service request Service Request message that comprises the CSFB indication
After UE receives beep-page message, judge if paging oneself, then can set up with MME and link by eNodeB, and by linking message to MME transmission Service Request, comprise CS fallbackindication in message, MME receives this service request information that comprises CSFB indication CSFB indication.
S220 sends the initial context that carries the CSFB indication to the base station and sets up request message
MME receives that the service request information that comprises CSFB indication successively can set up initial context by Initial Context SetupRequest message indication eNodeB, and in this Initial Context Setup Request message indication CS fallback indication.
S230 receives and carries the failure of establishing initial context Initial ContextSetup Fail message that content comprises the CSFB cell, continues to keep user's context
After eNodeB receives Initial Context Setup Request message, reply Initial Context SetupFail message, carry the cell that content comprises CSFB in the message, the mode of carrying the CSFB cell in the message can have multiple, for example can be with reference to other modes of mentioning among several modes enumerated among the S120 and the S120.MME can know that the eNodeB side is starting the CSFB flow process after receiving this Initial Context Setup Fail message that carries special cell, thereby continue to keep the context of user in core-network side, and does not think failure of establishing initial context.The method that present embodiment provides can be in core net, and for example the MME side realizes.
In the circuit domain dropping CSFB flow process Notification Method that another embodiment of the present invention provides, can also comprise before the S210:
S206 receives CS Paging message
The MSC of core-network side (Mobile Switching Center, mobile switching centre) notice MME has the beep-page message CS Paging in CS territory, and MME receives this CS Paging message
S208 broadcasts this CS beep-page message to UE
MME can broadcast this CS beep-page message to UE by the base station after receiving the CS beep-page message.
It is to be noted, these two steps are not the non-necessary procedure of circuit domain dropping CSFB flow process Notification Method that the embodiment of the invention provides, those skilled in the art also can expect having other executive mode or implementation, do not constitute for qualification of the present invention.
Another embodiment of the present invention provides a kind of circuit domain dropping CSFB flow process notifying device, comprising:
Initial context is set up request receiver module 310, is used to receive the initial context that carries the CSFB indication and sets up request message Initial Context Setup Request
After user equipment (UE) receives CS paging CS Paging message, if judge it is paging oneself, then can be by base station eNodeB and MME (Mobile Management Entity, mobile management entity) sets up link, and pass through this link to MME transmission service request Service Request message, in message, comprise the CSFB indication, be CS fallback indication, MME can send Initial Context Setup Request message to base station side after receiving Service Request message, indication CS fallback indication in this message, initial context is set up the initial context of asking receiver module 310 receptions to carry described CSFB indication and is set up request message.
Failure of establishing initial context is replied module 320, setting up request receiver module 410 with described initial context links to each other, be used to reply failure of establishing initial context Initial Context Setup Fail message, and in this message, carry the cell that content comprises CSFB.
Base station side is after receiving Initial Context Setup Request message, failure of establishing initial context is replied module 320 and is replied Initial Context Setup Fail message, and in this message, carry the cell that content comprises CSFB, thereby can notify MME eNodeB starting the CSFB flow process.Failure of establishing initial context is replied module 320 and is carried the mode of the cell that content comprises CSFB and can have multiple, for example can be with reference to other modes of mentioning among several modes enumerated among the S120 and the S120, corresponding, reply in the module 320 at the failure of establishing initial context that present embodiment is mentioned, also can comprise with described S 120 in the corresponding performance element of other modes mentioned among several modes of enumerating or the S120, for example, enumerated value CSFB activity increases the unit or CS Fallback Indicator increases unit etc.
In the present embodiment, base station side need not be set up E-RAB after the indication of receiving CSFB, thereby can reduce the time delay of CSFB, also avoided setting up E-RAB but switch at once or discharge the resource waste that may bring; By in Initial Context Setup Fail message, carrying the cell notice MME of CSFB, can avoid the conflict of E-RAB ID in Initial Context Setup Response message on the other hand for filling out cell.
In the circuit domain dropping CSFB flow process notifying device that another embodiment of the present invention provides, can also comprise: switch initiation module 330, reply module 320 with failure of establishing initial context and link to each other, be used for initiating to switch
The circuit domain dropping CSFB flow process notifying device that present embodiment provides is arranged at base station side, both can be embedded in the base station, also can link to each other for the device that is independent of the base station and with the base station.
Another embodiment of the present invention provides a kind of circuit domain dropping CSFB flow process notifying device, comprising:
Service request receiver module 410 is used to receive the service request Service Request message that comprises the CSFB indication
After UE receives beep-page message, judge if paging oneself, then can set up with core-network side and link by eNodeB, and by linking message to core-network side transmission service request Service Request, comprise CS fallback indication in message, service request receiver module 410 receives this service request information that comprises CSFB indication CSFBindication.
Initial context is set up request message sending module 420, links to each other with service request receiver module 410, is used for sending the initial context that carries the CSFB indication to the base station and sets up request message
Core-network side is received the service request information priority that comprises the CSFB indication, initial context is set up request message sending module 420 can set up initial context by Initial Context Setup Request message indication eNodeB, and indicates CS fallback indication in this Initial Context Setup Request message.
Failure of establishing initial context message sink module 430, set up request message sending module 420 with initial context and link to each other, be used to receive and carry content and comprise the failure of establishing initial context InitialContext Setup Fail message of CSFB cell and continue to keep user's context
After eNodeB receives Initial Context Setup Request message, reply Initial Context SetupFail message, carry the cell that content comprises CSFB in the message, the mode of carrying the CSFB cell in the message can have multiple, for example can be with reference to other modes of mentioning among several modes enumerated among the S120 and the S 120.After failure of establishing initial context message sink module 430 is received this Initial ContextSetup Fail message that carries special cell, can know that the eNodeB side is starting the CSFB flow process, thereby continue to keep the context of user, and do not think failure of establishing initial context in core-network side.
In the circuit domain dropping CSFB flow process notifying device that another embodiment of the present invention provides, described device can also comprise:
Beep-page message receiver module 406 links to each other with beep-page message broadcast module 408, is used to receive CS territory beep-page message
The MSC of core-network side (Mobile Switching Center, mobile switching centre) notice MME has the beep-page message CS Paging in CS territory, and beep-page message receiver module 406 receives this CS Paging message.
Beep-page message broadcast module 408 links to each other with service request receiver module 410, is used for broadcasting described CS beep-page message to UE
Beep-page message receiver module 406 receives after this CS Paging message, and beep-page message broadcast module 408 can be broadcasted this CS beep-page message to UE by the base station.
The circuit domain dropping CSFB flow process notifying device that present embodiment provides is arranged at core-network side, both can be embedded among the MME, also can link to each other for the device that is independent of MME and with MME
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, described program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a circuit domain dropping CSFB flow process Notification Method is characterized in that, comprising:
Receive initial context and set up request message, carry the CSFB indication in the described message;
Reply failure of establishing initial context message, carry the cell that content comprises CSFB in the described failure of establishing initial context message.
2. the method for claim 1, it is characterized in that carry the cell that content comprises CSFB in the described failure of establishing initial context message and specifically comprise: the Cause cell in described failure of establishing initial context message increases enumerated value CSFB activity newly.
3. the method for claim 1 is characterized in that, carries the cell that content comprises CSFB in the described failure of establishing initial context message and specifically comprises: newly-increased cell CS Fallback Indicator in described failure of establishing initial context message.
4. as claim 1 or 2 or 3 described methods, it is characterized in that described method also comprises: initiate to switch, UE is switched to target access system.
5. a circuit domain dropping CSFB flow process Notification Method is characterized in that, comprising:
Reception comprises the service request information of CSFB indication;
Send the initial context that carries the CSFB indication to the base station and set up request message;
The failure of establishing initial context Initial Context Setup Fail message that content comprises the CSFB cell is carried in reception, and keeps user's context.
6. method as claimed in claim 5 is characterized in that, the service request information that described reception comprises the CSFB indication also comprises before:
Receive CS territory beep-page message;
Broadcast described CS territory beep-page message to UE.
7. a circuit domain dropping CSFB flow process notifying device is characterized in that, comprising:
Initial context is set up request receiver module 310, is used to receive the initial context that carries the CSFB indication and sets up request message;
Failure of establishing initial context is replied module 320, is used to reply failure of establishing initial context message, and carries the cell that content comprises CSFB in this message.
8. device as claimed in claim 7 is characterized in that, described device also comprises: switch initiation module 330, be used for initiating to switch, UE is switched in the target access system.
9. a circuit domain dropping CSFB flow process notifying device is characterized in that, comprising:
Service request receiver module 410 is used to receive the service request information that comprises the CSFB indication;
Initial context is set up request message sending module 420, is used for sending the initial context that carries the CSFB indication to the base station and sets up request message;
Failure of establishing initial context message sink module 430 is used to receive and carries content and comprise the failure of establishing initial context message of CSFB cell and continue to keep user's context.
10. device as claimed in claim 9 is characterized in that, also comprises:
Beep-page message receiver module 406 is used to receive CS territory beep-page message;
Beep-page message broadcast module 408 is used for broadcasting described CS beep-page message to UE.
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| CN105025532A (en) * | 2015-06-12 | 2015-11-04 | 大唐移动通信设备有限公司 | A method and a system for handling circuit domain rollback |
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| CN102215569B (en) | 2016-01-13 |
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