CN101355785B - Method and system for transmitting non-access layer information during switching procedure - Google Patents
Method and system for transmitting non-access layer information during switching procedure Download PDFInfo
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- CN101355785B CN101355785B CN2007100754140A CN200710075414A CN101355785B CN 101355785 B CN101355785 B CN 101355785B CN 2007100754140 A CN2007100754140 A CN 2007100754140A CN 200710075414 A CN200710075414 A CN 200710075414A CN 101355785 B CN101355785 B CN 101355785B
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- message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
Abstract
The invention discloses a transmission method for a non-access layer NAS message during a switching process. The method comprises the following steps: UE sends a NAS message contained in a switching confirmation message at a UE end to eNodeB; if the switching is successful, the targeted eNodeB sends the received NAS message contained in the switching confirmation message to MME/SAE Gateway with the carrier of a switching completion message; the MME/SAE Gateway sends the NAS message at the MME/SAE Gateway end to the targeted eNodeB with the carrier of a switching completion confirmation message; and then the targeted eNodeB sends the NAS message to the UE. The invention also discloses a system of a long-term development network for realizing the method and a base station thereof. The method can reduce the transmission time delay of the NAS message during the switching process, provide services demanded by users in time, and simultaneously save empty interface resources.
Description
Technical field
The present invention relates to the transmission method of message in the mobile communications network, the transmission method of NAS in particularly a kind of handoff procedure (Non-Access Stratum, Non-Access Stratum) message.
Background technology
LTE (Long Term Evolution, long-term evolving network) is by 3GPP (the 3rd generation collaborative project) standardization body's defined next mobile broadband network standard in the 8th version.Figure 1 shows that the structural framing schematic diagram of LTE, LTE mainly comprises subscriber equipment (UE, User Equipment), eNB (evolved NodeB, the NodeB of evolution) and MME/SAE Gateway (mobile management entity/gateway), wherein being connected by the S1 interface between MME/SAE Gateway and the eNB, is that X2 interface connects between the eNB.A plurality of eNB constitute the Access Network of LTE, and and unlike comprising NodeB and RNC (network controller) in UMTS (Universal Mobile Telecommunications System, the global system for mobile communications) Access Network.MME/SAE Gateway constitutes the core net (CN, Core Network) of LTE.
Among the present LTE, handoff procedure is divided into two big classes, and a class is the switching by X2 interface, and a class is the switching by the S1 interface.When MME/SAE Gateway does not change in the handoff procedure, source eNB directly sends handoff request message to target eNB by X2 interface and switches, this moment, handoff procedure was finished under same MME/SAE Gateway, and this switching is commonly referred to the X2 mouth and switches.
NAS message is the signaling message between CN and the UE, related protocol (TS36.300V0.0.2) the regulation NAS message of existing LTE can be at RRC (Radio Resource Control, Radio Resource control) send (for example signaling is set up in the RRC connection) in the message, eNB is by RANAP (Radio AccessNetworkApplication Part then, the wireless access network applying portion) sends to CN in the message, for example initial user message (Initial UE Message).
Compare with the switching between the RNC in the UMTS network, the X2 mouth among the LTE between the eNB switches more frequent, if so in the handoff procedure, have NAS message to produce, this NAS message is to need to handle.As shown in Figure 2, be the transfer process schematic diagram of NAS message during X2 mouth handover success in the existing LTE network:
This LTE network comprises: UE, source eNB, target eNB and MME/SAE Gateway, and the simplified flow chart of switching is as follows:
Step 1: source eNB sends handoff request message to target eNB, the necessary information when carrying target side switching preparation in this handoff request;
Step 2: target eNB sends handoff request acknowledgment message to source eNB;
Step 3: source eNB sends switching command message to terminal, and this switching command message order UE finishes handoff procedure.
Step 4:UE sends switch acknowledgment message to target eNB, and this switch acknowledgment message is finished to target eNB affirmation switching, if UE this moment has the generation of NAS message, then this NAS message of buffer memory.
Step 5: target eNB sends handoff completion message to MME/SAE Gateway, this handoff completion message notice MME/SAE Gateway node is changing district more, MME/SAE Gateway switches to target eNB with data path, the user's face that source of release eNB is relevant and the resource of transport network layer.
Step 6:MME/SAE Gateway sends to switch to target eNB and finishes acknowledge message, and this switching is finished acknowledge message affirmation switching and finished, if this moment, MME/SAE Gateway produced NAS message, then this NAS message of buffer memory.
Step 7: target eNB sends resource release message to source eNB, and this resource release message triggers source eNB and discharges resource.After source eNB receives resource release message, discharge wireless and the resource resource chain of command.
Step 8: the NAS message that sends above-mentioned UE buffer memory in handoff procedure with up direct-sending message.
Step 9: target eNB sends direct-sending message to MME/SAE Gateway, and this message is used to transmit the above-mentioned up direct-sending message that target eNB receives from UE.
Step 10:MME/SAE Gateway sends direct-sending message to target eNB, and this message is the feedback message to the above-mentioned up direct-sending message that receives from target eNB.
Step 11: target eNB sends descending direct-sending message to UE, is used for transmitting the above-mentioned feedback message that receives from MME/SAEGateway.
Equally,, also want first buffer memory when step 6, also will wait to switch and handle again after finishing if MME/SAE Gateway has NAS message to produce.
Up direct-sending message and descending direct-sending message in the above steps belong to RRC message, and direct-sending message belongs to RANAP message.
In sum, prior art is when handover success, though can handle the NAS message that MME/SAE Gateway and UE end produces in the handoff procedure, NAS message will be in UE or MME/SAE Gateway end buffer memory a period of time, for example: the step 8 at Fig. 2 could send, and has increased time delay; And construct direct-sending message and send NAS message, as the step 8 of Fig. 2,9,10,11, promptly also to use RRC message and RANAP message, wasted interface-free resources.In addition, prior art is not handled the NAS message that the UE end produces in handoff procedure when handoff failure, therefore, can not provide the service of customer requirements.
Summary of the invention
In view of this, the purpose of the embodiment of the invention provides the transmission method and the system of NAS message in a kind of handoff procedure, reducing the time delay that NAS message sends, thereby can in time provide the service of customer requirements, and save interface-free resources.
Based on above purpose, the embodiment of the invention provides the transmission method of NAS message in a kind of handoff procedure, this method comprises: subscriber equipment sends switch acknowledgment message to target BS, if handover success, target BS sends handoff completion message to core net, core net sends to switch to target BS finishes acknowledge message, it is characterized in that: if subscriber equipment produces NAS message in the handoff procedure, and the NAS message that incidentally described subscriber equipment produces in the described switch acknowledgment message; The NAS message of described subscriber equipment incidentally in the described handoff completion message; If core net produces NAS message in the handoff procedure, the NAS message that incidentally described core net produces in the acknowledge message is finished in described switching; Target BS is transmitted described switching to subscriber equipment and is finished acknowledge message.
Embodiments of the invention also provide a kind of long-term evolving network system, and in handoff procedure, this system comprises: subscriber equipment, source base station, target BS, core net, described subscriber equipment are used for sending switch acknowledgment message to target BS; If handover success, described target BS is used for sending handoff completion message to core net, described core net is used for sending switching to target BS and finishes acknowledge message, it is characterized in that, described subscriber equipment comprises: an IE generation unit is used in the described switch acknowledgment message NAS message of subscriber equipment incidentally; Described target BS comprises: the IE synthesis unit is used at the described handoff completion message NAS message of described subscriber equipment incidentally, Dispatch Unit: be used for transmitting described switching to subscriber equipment and finish acknowledge message; Described core net comprises: the 2nd IE generation unit is used for finishing the incidentally NAS message of core net of acknowledge message in described switching.
Embodiments of the invention also provide a kind of base station, in handoff procedure, this base station is when handover success, as target BS: be used to receive from the switch acknowledgment message of subscriber equipment with from the switching of core net and finish acknowledge message, and to core net transmission handoff completion message, it is characterized in that: described base station also comprises: the IE synthesis unit is used in the described handoff completion message NAS message of described subscriber equipment incidentally; Dispatch Unit: be used for transmitting described switching and finish acknowledge message to subscriber equipment.
The method and system that the embodiment of the invention provides makes when handover success, the NAS message that subscriber equipment or core net end produce in the handoff procedure, finish acknowledge message incidentally by switch acknowledgment message in the handoff procedure and switching, can send in time, reduced time-delay, thereby the service of customer requirements in time is provided; And do not need to resend RRC direct-sending message or RANAP direct-sending message, saved interface-free resources; And do not need to increase any complexity.
Description of drawings
Fig. 1 is the schematic network structure of LTE in the prior art;
Fig. 2 is the schematic flow sheet when the X2 mouth switches in the prior art;
Fig. 3 is in the embodiment of the invention during X2 mouth handover success, the transfer process schematic diagram of NAS message;
Fig. 4 is in the embodiment of the invention during X2 mouth handoff failure, the transfer process schematic diagram of NAS message;
Fig. 5 is the system configuration schematic diagram of the embodiment of the invention;
Embodiment
For making goal of the invention, technical scheme and beneficial effect clearer, the specific embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
When being illustrated in figure 3 as in the specific embodiment of the invention X2 mouth handover success, the transfer process schematic diagram of NAS message.
Step 301:UE sends switch acknowledgment message to target eNB, if UE this moment has NAS message to send, then this NAS message incidentally sent in switch acknowledgment message, and this NAS message of buffer memory.Concrete grammar is that UE generates a NAS PDU IE, this IE is inserted the IE tabulation of following switch acknowledgment message.
| Information?Element/Groupname | Need | Multi | Type?andreference | Semanticsdescription | Version |
| Message?Type | MP | Message?Type | |||
| UE?Information?Elements | |||||
| Integrity?info | Op | ||||
| Ciphering?info | OP | ||||
| New?U-RNTI | OP | ||||
| New?C-RNTI | OP | ||||
| Other | OP | ||||
| RB?Information?elements | |||||
| Downlink?counter?synchronisationinfo | OP | ||||
| >rb?info | OP | ||||
| NAS?elements | |||||
| NAS?PDU | OP | ||||
| Other IE |
The IE tabulation of switch acknowledgment message
Step 302: after target eNB is received this switch acknowledgment message, send handoff completion message to MME/SAE Gateway, if find to have in the above-mentioned switch acknowledgment message an above-mentioned NAS PDUIE, then this IE is taken out, and insert the IE tabulation of following handoff completion message.
| Message?Type | M | ||||
| Target?eNB?UE?Context?ID | M | allocated?atthe?MMENote：workingIE?name | |||
| MME?Context?ID | M | allocated?atthe?source?eNBNote：workingIE?name | |||
| SAE?Bearers?Admitted?List | |||||
| >SAE?Bearer?Info | 1?to<maxnoofSAEbearers> | ||||
| >>SAE?Bearer?ID | M | ||||
| >>GTP?TunnelEndpoint?info | O | Target?eNBtunnel | |||
| SAE?Bearers?Not?AdmittedList | |||||
| >SAE?Bearer?Info | 1?to<maxnoofSAEbearers> | ||||
| >>SAE?Bearer?ID | M | ||||
| >>Cause | M | ||||
| Target?eNodeB?to?SourceeNodeB?Transparent?Container | M | It?includes?HOinfo?for?the?UE | |||
| NASINFO | |||||
| >NAS?PDU | O | ||||
| Other IE |
The IE tabulation of handoff completion message
Step 303: when MME/SAE Gateway receives above-mentioned handoff completion message, send switching to target eNB and finish acknowledge message, if MME/SAE Gateway this moment has NAS message to send, then generate the 2nd NAS PDU IE, this IE is inserted the IE tabulation that acknowledge message is finished in following switching.
| Information?Element/Group?name | Need | Multi | Type?andreference | Semantics?description | Version |
| Message?Type | MP | Message?Type |
| Target?eNB?UE?Context?ID | M | allocated?at?the?MMENote：working?IE?name | |||
| MME?Context?ID | M | allocated?at?the?sourceeNBNote：working?IE?name | |||
| NASINFO | |||||
| >NAS?PDU | O | ||||
| Other IE |
Switch the IE tabulation of finishing acknowledge message
Step 304: finish acknowledge message when target eNB receives this switching from MME/SAE Gateway, if find to have in this message the 2nd NAS PDU IE, just transmitting above-mentioned switching with RRC message to UE finishes acknowledge message.
When being illustrated in figure 4 as in the embodiment of the invention X2 mouth handoff failure, the transfer process schematic diagram of NAS message: this process is UE NAS message incidentally in the switch acknowledgment message that sends to target eNB, and UE is with the not a kind of processing during success synchronously of target eNB.
Step 401:UE sends switch acknowledgment message to target eNB, NAS message incidentally in this message, and this NAS message of buffer memory.
Step 402: UE does not successfully arrive target eNB to the switch acknowledgment message that target eNB sends in the above-mentioned steps 401, i.e. UE and target eNB synchronization failure.UE sends article one RRC message to source eNB and recovers and being connected of source eNB, and UE carries the NAS message of above-mentioned buffer memory in this RRC message.
Step 403: source eNB transmits the above-mentioned article one RRC message that receives from UE with direct-sending message or other RANAP message to MME/SAE Gateway.
In addition, if at source eNB before UE sends switching command message, MME/SAE Gateway produces NAS message, this NAS message uses existing direct-sending message to be sent to source eNB, incidentally sends to UE again in switching command message.
The embodiment of NAS method for message transmission in the above-mentioned handoff procedure that provides for embodiment.The embodiment of the invention also provides a kind of LTE system, is used for the transmission of NAS message, is illustrated in figure 5 as the concrete structure schematic diagram of LTE system in the present embodiment, and this system comprises:
Target eNB 520, be used for when handover success, receive switch acknowledgment message from the UE termination, send handoff completion message to MME/SAE Gateway, receive to switch from MME/SAE Gateway and finish acknowledge message, if this message has the NAS message of MME/SAE Gateway, then acknowledge message is finished in this switching and be transmitted to UE, target eNB 720 also comprises IE extraction unit 521, is used for receiving above-mentioned switch acknowledgment message from subscriber equipment, and the NAS PDU IE in this message is extracted; IE synthesis unit 522 is used for a NAS PDU IE is inserted handoff completion message; Dispatch Unit 523 is used for the handoff completion message of the NAS message of MME/SAE Gateway incidentally is transmitted to UE.
Source eNB530 is used for when handoff failure, receives above-mentioned article one RRC message from UE, and transmits this message with the RANAP direct-sending message to MME/SAE Gateway540.
MME/SAE Gateway540 is used for when handover success, sends to switch to target eNB and finishes acknowledge message, if there is NAS message to send, also comprise the 2nd IE generation unit 541, be used to generate the 2nd NAS PDU IE, and this IE is inserted the IE tabulation that acknowledge message is finished in above-mentioned switching.
More than be to the transmission method of NAS message in a kind of handoff procedure provided by the present invention and the detailed introduction of system, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1. the transmission method of non access stratum NAS message in the handoff procedure, this method comprises, subscriber equipment sends switch acknowledgment message to target BS, if handover success, target BS sends handoff completion message to core net, core net sends to switch to target BS finishes acknowledge message, it is characterized in that:
If subscriber equipment produces NAS message in the handoff procedure, the NAS message that incidentally described subscriber equipment produces in the described switch acknowledgment message; The NAS message of described subscriber equipment incidentally in the described handoff completion message;
If core net produces NAS message in the handoff procedure, the NAS message that incidentally described core net produces in the acknowledge message is finished in described switching; Target BS is transmitted described switching to subscriber equipment and is finished acknowledge message.
2. transmission method as claimed in claim 1 is characterized in that, in the described switch acknowledgment message incidentally the method for the NAS message that produces of subscriber equipment comprise:
Described subscriber equipment generates a NAS Packet Data Unit cell NAS PDU IE, a described NAS PDU IE is inserted the cell IE tabulation of described switch acknowledgment message.
3. transmission method as claimed in claim 2 is characterized in that, the method for the NAS message that incidentally described subscriber equipment produces in the described handoff completion message comprises:
Described target BS takes out the described NAS PDU IE in the described switch acknowledgment message, and inserts the IE tabulation of described handoff completion message.
4. transmission method as claimed in claim 1 is characterized in that, the method that the NAS message that core net incidentally produces is finished in the acknowledge message in described switching comprises:
Described core net generates the 2nd NAS PDU IE, and described the 2nd NAS PDU IE is inserted the IE tabulation that acknowledge message is finished in described switching.
5. transmission method as claimed in claim 1, it is characterized in that if the NAS message that described subscriber equipment also produces in the buffer memory handoff procedure is handoff failure, then described subscriber equipment sends the NAS message of described buffer memory to source base station, and described source base station is transmitted described NAS message to core net.
6. described transmission method as claimed in claim 5 is characterized in that, the method that sends the NAS message of described buffer memory to described source base station comprises:
Subscriber equipment sends article one radio resource control RRC message to described source base station, is used for recovering and being connected of source base station, and described subscriber equipment carries the NAS message of described buffer memory in this message.
7. described transmission method as claimed in claim 1, it is characterized in that, if at source base station before subscriber equipment sends switching command message, core net produces NAS message, this NAS message uses existing direct-sending message to be sent to source base station, incidentally sends to subscriber equipment again in switching command message.
8. long-term evolving network system, in handoff procedure, this system comprises: subscriber equipment, source base station, target BS, core net, described subscriber equipment are used for sending switch acknowledgment message to target BS; If handover success, described target BS are used for sending handoff completion message to core net, described core net is used for sending switching to target BS and finishes acknowledge message, it is characterized in that,
Described subscriber equipment comprises: an IE generation unit is used in the described switch acknowledgment message non access stratum NAS message of subscriber equipment incidentally;
Described target BS comprises: the IE synthesis unit is used at the described handoff completion message NAS message of described subscriber equipment incidentally, Dispatch Unit: be used for transmitting described switching to subscriber equipment and finish acknowledge message;
Described core net comprises: the 2nd IE generation unit is used for finishing the incidentally NAS message of core net of acknowledge message in described switching.
9. system as claimed in claim 8, it is characterized in that, a described IE generation unit is used to generate a NAS Packet Data Unit cell NAS PDU IE, and a described NAS PDU IE is inserted the cell of described switch acknowledgment message and tabulate, and this NAS message of buffer memory.
10. system as claimed in claim 9 is characterized in that, described target BS also comprises:
The IE extraction unit is used for extracting a described NAS PDU IE from described switch acknowledgment message;
Described IE synthesis unit, a described NAS PDU IE who is used for extracting inserts handoff completion message;
Described Dispatch Unit is used for transmitting the switching of described core net to described subscriber equipment and finishing acknowledge message when described switching is finished acknowledge message and comprised the NAS message of core net.
11. system as claimed in claim 8 is characterized in that, described the 2nd IE generation unit is used to generate the 2nd NAS PDU IE, and described the 2nd NAS PDU IE is inserted the cell tabulation that acknowledge message is finished in described switching.
12. system as claimed in claim 8 is characterized in that, described subscriber equipment also comprises: the message buffering unit is used for the NAS message that the buffer memory handoff procedure produces; When if handoff failure, then described subscriber equipment recover to connect to described source base station transmission article one radio resource control RRC message, the NAS message of in this message, carrying described buffer memory.
13. system as claimed in claim 8 is characterized in that, source base station is used for transmitting the described article one RRC message that receives from subscriber equipment to core net.
14. base station, in handoff procedure, this base station is when handover success, as target BS: be used to receive from the switch acknowledgment message of subscriber equipment with from the switching of core net and finish acknowledge message, and to core net transmission handoff completion message, it is characterized in that: described base station also comprises:
The IE synthesis unit is used in the described handoff completion message non access stratum NAS message of described subscriber equipment incidentally;
Dispatch Unit: be used for transmitting described switching and finish acknowledge message to subscriber equipment.
15. base station as claimed in claim 14, in handoff procedure, during handoff failure, this base station is characterized in that as source base station: described source base station is used for transmitting the described article one radio resource control RRC message that receives from subscriber equipment to core net.
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| CN2007100754140A CN101355785B (en) | 2007-07-26 | 2007-07-26 | Method and system for transmitting non-access layer information during switching procedure |
| PCT/CN2008/070742 WO2009012666A1 (en) | 2007-07-26 | 2008-04-17 | A method and system for transmitting a non-access layer message during handover and a base station thereof |
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| CN2007100754140A CN101355785B (en) | 2007-07-26 | 2007-07-26 | Method and system for transmitting non-access layer information during switching procedure |
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| EP2317856A1 (en) | 2008-07-09 | 2011-05-11 | Basf Se | Pesticidal mixtures comprising isoxazoline compounds ii |
| WO2010088795A1 (en) * | 2009-02-03 | 2010-08-12 | 深圳华为通信技术有限公司 | Bearing processing method and apparatus as well as adhesion method and apparatus |
| EP2396942B1 (en) * | 2009-02-16 | 2015-03-11 | Telefonaktiebolaget LM Ericsson (publ) | Un-ciphered network operation solution |
| CN102202367B (en) * | 2010-03-23 | 2015-05-06 | 重庆重邮信科通信技术有限公司 | Method for switching non-access stratum of multi-mode terminal |
| CN102404809A (en) * | 2010-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | Method and system for transferring data transmission channel |
| CN102572816B (en) * | 2011-12-27 | 2014-08-06 | 电信科学技术研究院 | Method and device for mobile switching |
| CN104219637B (en) * | 2013-05-31 | 2019-04-16 | 中兴通讯股份有限公司 | A kind of sending method of non-access layer information, base station and equipment of the core network |
| EP3261404A1 (en) * | 2016-06-01 | 2017-12-27 | HTC Corporation | Device and method of handling radio resource control connection (rrc) resume procedure |
| CN110167081B (en) * | 2018-02-13 | 2022-07-26 | 中兴通讯股份有限公司 | Authentication method and device, message processing method and device, and storage medium |
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