CN102396281B - Method and device for processing random access procedure - Google Patents
Method and device for processing random access procedure Download PDFInfo
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- CN102396281B CN102396281B CN200980119880.1A CN200980119880A CN102396281B CN 102396281 B CN102396281 B CN 102396281B CN 200980119880 A CN200980119880 A CN 200980119880A CN 102396281 B CN102396281 B CN 102396281B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
A method for processing a random access procedure is disclosed by the embodiment of the present invention, and includes the following steps: the MAC layer enters into random access failure mode; if the MAC layer continues the current random access procedure, the MAC layer, after selection, implements the new random access procedure indicated by the RRC layer, and if the MAC layer stops the current random access procedure, the MAC layer implements the new random access procedure indicated by the RRC layer. In addition, the present invention also discloses a device for processing a random access procedure. By using the technical solutions provided by the embodiments of the present invention, it is ensured that the random access procedure caused by RRC connection reconstruction has a higher priority, and thus the waste of random access resources is avoided.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of processing method of random access problems, device.
Background technology
Random access in LTE is divided into competitive mode and noncompetitive pattern, and wherein, the random access procedure of competitive mode is divided into four steps, as shown in Figure 1:
UE successfully receives after message 2, and MAC layer need to cushion the uplink message of need transmission in message 3.
The resource that message 3, UE use message 2 to distribute sends resource request at Uplink Shared Channel, and carries out collision detection;
In random access procedure, on Uplink Shared Channel, transmit C-RNTI MAC CE(media access control unit) or CCCH SDU(Common Control Channel service data unit) MAC PDU(media access control protocol data unit).Because C-RMTI MAC CE and CCCH SDU all comprise the unique identification of UE, UE can independently select preamble and PRACH(Physical Random Access Channel) resource, if different UEs has been selected identical preamble and PRACH, just can clash, so message 3 can be used for collision detection.
The resource allocation conditions of message 4, eNB feedback data, and indicate collision detection whether successful.
The random access procedure of noncompetitive pattern is that UE distributes special access lead (dedicated preamble) and PRACH by eNB, so the random access procedure of noncompetitive pattern is divided into 3 steps, as shown in Figure 2:
Message 0, eNB distribute Dedicated preamble and the spendable special PRACH resource of UE to UE;
In this PRACH resource that message 1, UE distribute at eNB, send Dedicated preamble;
Under noncompetitive pattern, UE does not correctly receive the message 2 that eNB sends, and under competitive mode, UE does not correctly receive message 2 or the message 4 that eNB sends, and all can cause random access procedure failure.UE, in sending preamble for the first time, starts a timer, in the time that this timer does not stop, if current failed random access procedure is noncompetitive pattern, UE starts to initiate random access procedure next time from message 1 immediately, until random access procedure success stops this timer; If current failed random access procedure is competitive mode, in message 2, backoff (maximum time interval of twice random access) is arranged, UE 0 and this backoff after arranging between select a random number, as the time interval of twice random access, time interval of this twice random access then after, from message 1, initiate random access procedure next time, until random access procedure success stops this timer.If this timer stops, random access procedure is still unsuccessful, stops attempting random access procedure.
When UE sends random access preamble, start preamble transmitting counter, preamble of every transmission, counter will add 1, in the time that preamble transmitting counter reaches maximum number of times of transmission and adds 1, the MAC layer of UE sends random access problems instruction to rrc layer, and rrc layer is initiated RRC connection reconstruction process, RRC connection reconstruction triggers MAC layer and starts new random access procedure, as shown in Figure 3:
301, the MAC layer of UE sends random access problems instruction to rrc layer, and continues the current random access procedure of MAC layer;
302, the rrc layer of UE is initiated RRC connection reconstruction process after receiving this problem instruction, and instruction MAC layer starts new random access procedure.
Now, there are two random access procedures in MAC layer, respectively the new random access procedure of the current random access procedure of MAC layer and rrc layer instruction, the new random access procedure that MAC layer determines to continue current random access procedure or carries out rrc layer instruction according to the realization of UE.MAC layer is processed new and old random access procedure and causes the competition of random access procedure, has caused the waste of random access resource.
Summary of the invention
The technical problem underlying that embodiment of the present invention will solve is to provide a kind of processing method, device of random access procedure.
In order to realize the object of the embodiment of the present invention, the embodiment of the present invention provides following technical scheme:
A processing method for random access procedure, comprising:
MAC layer enters random access failure pattern;
If MAC layer stops current random access procedure, MAC layer is carried out the new random access procedure of RRC instruction;
If MAC layer continues current random access procedure, MAC layer is carried out the new random access procedure of being indicated by rrc layer after selecting, and ensures that the described new random access procedure that RRC connection reconstruction causes has higher priority.
A processing unit for random access procedure, comprising:
Confirm module, for confirming that MAC layer enters random access mode;
Processing module, enters after random access mode for MAC layer, and MAC layer stops current random access procedure, carries out the new random access procedure of rrc layer instruction; If or MAC layer continues current random access procedure, after selecting, carry out the new random access procedure of rrc layer instruction, ensure that the described new random access procedure that RRC connection reconstruction causes has higher priority.
MAC layer enters random access failure pattern, if MAC layer stops current random access procedure, initiates after new random access procedure when RRC connection reconstruction triggers rrc layer instruction MAC layer, and MAC layer is carried out the new random access procedure of rrc layer instruction; If MAC layer continues current random access procedure, when triggering rrc layer instruction MAC layer, RRC connection reconstruction initiates after new random access procedure, now MAC layer has the new random access procedure of current random access procedure and rrc layer instruction, after MAC selects, carries out the new random access procedure of being indicated by rrc layer.Ensure that the new random access procedure that RRC connection reconstruction causes has higher priority, avoided the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoided the waste of random access resource.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the random access procedure figure of competitive mode;
Fig. 2 is the random access procedure figure of noncompetitive pattern;
Fig. 3 is existing random access processing mode flow chart;
Fig. 4 is the flow chart of the embodiment of the present invention one;
Fig. 5 is the flow chart of the embodiment of the present invention two;
Fig. 6 is the flow chart of the embodiment of the present invention three;
Fig. 7 is the flow chart of embodiment of the present invention device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Under noncompetitive pattern, UE does not receive the message 2 that eNB sends, and under competitive mode, UE does not receive message 2 or the message 4 that eNB sends, and all can cause random access procedure failure.After entering at random unsuccessfully, UE is in sending preamble for the first time, start a timer, in the time that this timer does not stop, if current failed random access procedure is noncompetitive pattern, UE starts to initiate random access procedure next time from message 1 immediately, until random access procedure success stops this timer; If current failed random access procedure is competitive mode, UE can 0 and backoff between select a random number, as the time interval of twice random access, time interval of this twice random access then after, from message 1, initiate random access procedure next time, until random access procedure success stops this timer, as shown in Figure 4, for the flow chart of the embodiment of the present invention one, be specially:
401, MAC layer enters random access failure pattern;
When the MAC layer of UE sends random access preamble, also start preamble transmitting counter, preamble of every transmission, counter will add 1, in the time that preamble transmitting counter reaches maximum number of times of transmission and adds 1, the MAC layer of UE sends random access problems instruction to rrc layer.
If 402a media access control MAC layer stops current random access procedure, MAC layer is carried out the new random access procedure of rrc layer instruction; Or
If 402b MAC layer continues current random access procedure, the new random access procedure of being indicated by rrc layer is selected and carried out to MAC layer.
Wherein, MAC layer also comprises after entering random access failure pattern, and MAC layer receives that after the instruction of the RRC connection reconstruction that rrc layer sends, MAC layer is initiated the new random access procedure of RRC connection reconstruction instruction.
In 402a step, if MAC layer stops, after current random access procedure, also comprising:
The value of replacement preamble transmitting counter and backoff.
If random access procedure is competitive mode, needs also to need to remove message 3 and cushion.
Because in the random access procedure under competitive mode, message 3 is the MAC Control Element that comprises C-RNTI or the uplink message of CCCH SDU, before message 3 successfully sends, MAC layer needs this uplink message to cushion in message 3, when MAC layer stops after current random access procedure, flush message 3 cushions, the resource that buffer release is shared.
MAC layer enters random access failure pattern, if MAC layer stops current random access procedure, initiates after new random access procedure when RRC connection reconstruction triggers rrc layer instruction MAC layer, and MAC layer is carried out the new random access procedure of rrc layer instruction; If MAC layer continues current random access procedure, when triggering rrc layer instruction MAC layer, RRC connection reconstruction initiates after new random access procedure, now MAC layer has the new random access procedure of current random access procedure and rrc layer instruction, after MAC selects, carries out the new random access procedure of being indicated by rrc layer.Ensure that the new random access procedure that RRC connection reconstruction causes has higher priority, avoided the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoided the waste of random access resource.
After the preamble of UE transmitting counter reaches maximum number of times of transmission and adds 1, stop the random access procedure of current MAC layer, the value of replacement preamble transmitting counter and backoff, if random access procedure is competitive mode, also need flush message 3 to cushion, the resource of release busy, as shown in Figure 5, for the flow chart of the embodiment of the present invention two, be specially:
501, the MAC layer of UE sends random access problems instruction to rrc layer, and stop the current random access procedure of MAC layer, the value of replacement preamble transmitting counter and backoff, if current random access mode is the random access procedure of competitive mode, needs flush message 3 simultaneously to cushion.Because in the random access procedure under competitive mode, the uplink message of the MAC Control Element that message 3 comprises C-RNTI or CCCH SDU, before message 3 successfully sends, MAC layer needs this uplink message to cushion in message 3, when MAC layer stops after current random access procedure, flush message 3 cushions, the resource that buffer release is shared.
502, rrc layer instruction MAC layer triggers the new random access procedure being caused by RRC connection reconstruction.
The rrc layer of UE is receiving after this problem instruction, whether rrc layer judgement initiates RRC connection reconstruction process.
If initiate RRC connection reconstruction, RRC connection reconstruction instruction MAC layer starts new random access procedure, and MAC layer is carried out the new random access procedure of rrc layer instruction;
If do not initiate RRC connection reconstruction, rrc layer replacement MAC layer.
MAC layer enters random access failure pattern, if MAC layer stops current random access procedure, when triggering rrc layer instruction MAC layer, RRC connection reconstruction initiates after new random access procedure, MAC layer is carried out the new random access procedure of rrc layer instruction, ensure that the new random access procedure that RRC connection reconstruction causes has higher priority, avoid the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoid the waste of random access resource.
After the preamble transmitting counter of UE reaches maximum number of times of transmission and adds 1, MAC layer continues current random access procedure, now, MAC layer comprises two random access procedures, be respectively the new random access procedure of the current random access procedure of MAC layer and rrc layer instruction, the new random access procedure of rrc layer instruction should be selected and carry out to MAC layer.As shown in Figure 6, be the flow chart of the embodiment of the present invention three, be specially:
601, the MAC layer of UE sends after random access problems instruction to rrc layer, continues current random access procedure;
602, rrc layer instruction MAC layer triggers the new random access procedure being caused by RRC connection reconstruction, and MAC layer is carried out the new random access procedure of being indicated by rrc layer after selecting.
The rrc layer of UE receives, after this problem instruction, whether this rrc layer judgement initiates RRC connection reconstruction process;
If rrc layer is initiated RRC connection reconstruction process, this RRC connection reconstruction process triggers new random access procedure, the new random access procedure that now MAC layer comprises current random access procedure and rrc layer instruction, and MAC layer is selected the new random access procedure of rrc layer instruction;
If do not initiate RRC connection reconstruction process, rrc layer replacement MAC layer, and stop the current random access procedure of MAC layer.
MAC layer enters random access failure pattern, if MAC layer continues current random access procedure, when triggering rrc layer instruction MAC layer, RRC connection reconstruction initiates after new random access procedure, now MAC layer has the new random access procedure of current random access procedure and rrc layer instruction, after MAC selects, carries out the new random access procedure of being indicated by rrc layer.Ensure that the new random access procedure that RRC connection reconstruction causes has higher priority, avoided the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoided the waste of random access resource.
As shown in Figure 7, be the flow chart of embodiment of the present invention device, this device is specially and comprises:
Confirm module 701, for confirming that MAC layer enters random access failure pattern;
Processing module 702, enters after random access mode for this MAC layer, and this MAC layer stops current random access procedure, carries out the new random access procedure of rrc layer instruction; If or this MAC layer continues current random access procedure, the new random access procedure of execution rrc layer instruction after selecting.
Wherein, described confirmation module also comprises:
Wherein, if described processing module also stops current random access procedure for MAC layer, the value of replacement preamble transmitting counter and backoff;
Wherein, if described processing module is also competitive mode for random access procedure, removes message 3 and cushion.
Wherein, described processing module is also for receiving after the RRC connection reconstruction instruction of rrc layer transmission, trigger MAC layer the new random access procedure of initiating the instruction of RRC connection reconstruction.
When MAC layer enters random access failure pattern, if MAC layer stops current random access procedure, MAC layer is carried out the new random access procedure of rrc layer instruction; If MAC layer continues current random access procedure, MAC selects to carry out the new random access procedure of being indicated by rrc layer.Ensure that the random access procedure that RRC connection reconstruction causes has higher priority, avoided the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoided the waste of random access resource.
When MAC layer enters random access failure pattern, if MAC layer stops current random access procedure, MAC layer is carried out the new random access procedure of rrc layer instruction; If MAC layer continues current random access procedure, MAC selects to carry out the new random access procedure of being indicated by rrc layer.Ensure that the random access procedure that RRC connection reconstruction causes has higher priority, avoided the competition of current random access procedure and the new random access procedure that RRC connection reconstruction causes of MAC layer, thereby avoided the waste of random access resource.
By the description of above each embodiment, those skilled in the art can be well understood to the present invention and can realize by the mode of software and essential general hardware platform, certainly, also can pass through hardware, but much the former is better embodiment in situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method that each embodiment of the present invention is somebody's turn to do.
Although by with reference to some preferred embodiment of the present invention, the present invention is illustrated and described, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. a processing method for random access procedure, is characterized in that, comprising:
Media access control MAC layer enters random access failure pattern, and wherein, described random access failure pattern refers to UE and initiates after current random access procedure, does not receive accidental access response message and/or collision detection success message;
If MAC layer stops current random access procedure, MAC layer is carried out the new random access procedure of radio resource control RRC layer instruction;
If MAC layer continues current random access procedure, MAC layer is carried out the new random access procedure of being indicated by rrc layer after selecting, and ensures that the described new random access procedure that RRC connection reconstruction causes has higher priority.
2. method according to claim 1, is characterized in that, MAC layer enters after random access failure pattern, also comprises:
The replacement access lead preamble transmitting counter of MAC layer reaches maximum transmission times and adds 1
After, MAC layer sends random access problems instruction to rrc layer.
3. method according to claim 1 and 2, is characterized in that, if MAC layer stops, after current random access procedure, also comprising:
The value of the maximum time interval backoff of twice random access of MAC layer reset preamble transmitting counter and MAC layer.
4. method according to claim 3, is characterized in that, if random access mode is competitive mode, also comprises:
MAC layer is removed message 3 and is cushioned.
5. method according to claim 1 and 2, is characterized in that, described media access control
MAC layer enters after random access failure pattern, also comprises:
MAC layer receives the RRC connection reconstruction instruction that rrc layer sends, and triggers MAC layer and initiates the new random access procedure that RRC connection reconstruction is indicated.
6. a processing unit for random access procedure, is characterized in that, comprising:
Confirm module, for confirming that MAC layer enters random access failure pattern, wherein, described random access failure pattern refers to UE and initiates after current random access procedure, does not receive accidental access response message and/or collision detection success message;
Processing module, enters after random access failure pattern for MAC layer, and MAC layer stops current random access procedure, carries out the new random access procedure of rrc layer instruction; If MAC layer continues current random access procedure, after selecting, carry out the new random access procedure of rrc layer instruction, ensure that the described new random access procedure that RRC connection reconstruction causes has higher priority.
7. device according to claim 6, is characterized in that, described confirmation module also comprises:
Confirm module one, after confirming that preamble transmitting counter reaches maximum transmission times and adds 1, MAC layer sends random access problems instruction to rrc layer.
8. according to the device described in claim 6 or 7, it is characterized in that,
If described processing module also stops current random access procedure for MAC layer, the value of replacement preamble transmitting counter and backoff.
9. device according to claim 8, is characterized in that,
If described processing module is also competitive mode for random access procedure, removes message 3 and cushion.
10. device according to claim 6, is characterized in that,
Described processing module is also for receiving after the RRC connection reconstruction instruction of rrc layer transmission, trigger MAC layer the new random access procedure of initiating the instruction of RRC connection reconstruction.
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| PCT/CN2009/070646 WO2010099659A1 (en) | 2009-03-05 | 2009-03-05 | Method and device for processing random access procedure |
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| CN109392049A (en) * | 2017-08-02 | 2019-02-26 | 夏普株式会社 | The remapping method and device of media access control layer |
| CN111726884B (en) * | 2019-03-20 | 2022-06-07 | 中国移动通信有限公司研究院 | Indication method and device |
| CN113647186A (en) * | 2019-03-28 | 2021-11-12 | 上海诺基亚贝尔股份有限公司 | Mechanism for fallback from a first random access mode to a second random access mode |
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| CN101155405A (en) * | 2006-09-29 | 2008-04-02 | 北京三星通信技术研究有限公司 | Device and method for solving collision in random access course |
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| US6721281B1 (en) * | 1999-06-18 | 2004-04-13 | Interdigital Technology Corporation | Random access channel access and backoff mechanism |
| EP2078342B1 (en) * | 2006-10-30 | 2015-08-26 | LG Electronics Inc. | Method for transmitting random access channel message and response message, and mobile communication terminal |
| CN101370270A (en) * | 2007-08-13 | 2009-02-18 | 中兴通讯股份有限公司 | Accidental access method for honeycomb wireless communication system |
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| CN101155405A (en) * | 2006-09-29 | 2008-04-02 | 北京三星通信技术研究有限公司 | Device and method for solving collision in random access course |
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| 3GPP.Medium Access Control (MAC) protocol specification.《3GPP TS 25.321,V8.4.0,Medium Access Control (MAC) protocol specification(Release 8)》.2009,第11.2.2节. * |
| 3GPP.MediumAccessControl(MAC)protocolspecification.《3GPPTS25.321 V8.4.0 |
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