CN107135522A - A kind of method and user equipment for improving handover success rate - Google Patents
A kind of method and user equipment for improving handover success rate Download PDFInfo
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- CN107135522A CN107135522A CN201610112579.XA CN201610112579A CN107135522A CN 107135522 A CN107135522 A CN 107135522A CN 201610112579 A CN201610112579 A CN 201610112579A CN 107135522 A CN107135522 A CN 107135522A
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- 238000000034 method Methods 0.000 title claims abstract description 79
- 230000008569 process Effects 0.000 claims abstract description 38
- 238000012790 confirmation Methods 0.000 claims abstract description 7
- 230000000977 initiatory effect Effects 0.000 claims description 23
- 238000010295 mobile communication Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 101100396152 Arabidopsis thaliana IAA19 gene Proteins 0.000 description 4
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 description 4
- 101150096622 Smr2 gene Proteins 0.000 description 4
- 102100039292 Cbp/p300-interacting transactivator 1 Human genes 0.000 description 3
- 101000888413 Homo sapiens Cbp/p300-interacting transactivator 1 Proteins 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 108091005487 SCARB1 Proteins 0.000 description 1
- 102100037118 Scavenger receptor class B member 1 Human genes 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/04—Scheduled access
-
- 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
-
- 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
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
- H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to the switching field of mobile communication, more particularly to a kind of method and user equipment for improving handover success rate.Wherein, improving the method for handover success rate includes：In handoff procedure, during T304 timer expiries, user equipment (UE) judges whether MSG3 has sent；Match somebody with somebody completion message again comprising switching in the MSG3；If having sent, the confirmation ACK of the MSG3 is waited to feed back；Otherwise initiate to re-establish process.Accordingly, present invention also offers a kind of user equipment for improving handover success rate.
Description
Technical field
The present invention relates to the switching field of mobile communication, more particularly to a kind of method for improving handover success rate
And user equipment.
Background technology
With third generation partner program (The 3rd Generation Partnership Project,
Abbreviation 3GPP) technology propulsion, the communications industry to Long Term Evolution (Long Term Evolution, referred to as
LTE) the commercial of system accelerates to promote, and LTE technologies are more and more received and grasped by people, skill
Art document and regulation are also perfect therewith, and LTE protocol experienced the hair of multiple versions in short several years
Exhibition, content is more rich, function more comprehensively, details it is more accurate, but with the increasing of the commercial scene of LTE system
It is many, it will reflect in practical application and not consider thorough aspect in agreement.
In Current protocol, for handover trigger based on non-competing random access procedure, basic procedure is such as
Under：Target cell is to one special lead code of carrying in the handoff response of cell-of-origin, when switching for UE
Use non-competing mode Stochastic accessing；When user equipment (User Equipment, abbreviation UE) is received and taken
After the RRC connection reallocation messages of Tape movement control (mobilityControlInfo) field, it is believed that cut
Beginning is changed, starts T304 timers, and initiates the Stochastic accessing to target side, when random access procedure is complete
Into then kill T304 timers.UE and base station (LTE systems are occurred when implementing according to existing protocol
Evolved node B, evolved Node B, abbreviation eNB are also referred to as in system) to switching successfully or failing
Judge inconsistent situation, so as to cause the exception of follow-up process, handover success rate reduction.
The content of the invention
The invention provides a kind of method and user equipment for improving handover success rate, to solve UE and eNB
The problem of inconsistent caused handover success rate is low is judged switching result.
To solve the above problems, the method for the raising handover success rate that the present invention is provided, including：Switched
When Cheng Zhong, T304 timer expiry, user equipment (UE) judges whether MSG3 has sent；In the MSG3
Match somebody with somebody completion message again comprising switching；If having sent, the confirmation ACK of the MSG3 is waited to feed back；Otherwise
Initiation re-establishes process.
It is preferred that, above-mentioned wait MSG3 ACK feedbacks include：If received in preset time T described
ACK feeds back, it is determined that switch successfully, and no longer initiates to re-establish process.If do not received in preset time T
To ACK feedbacks, it is determined that handoff failure, initiation re-establishes process.
It is preferred that, above-mentioned preset time T reaches maximum re-transmission less than or equal to wireless chain control layer RLC
Time used in number of times.
In order to solve the above technical problems, present invention also offers a kind of user equipment for improving handover success rate
Including judge module, re-establish process initiation module；Wherein, judge module is used in handoff procedure, T304
During timer expiry, judge whether MSG3 has sent；And will determine that result re-establishes process hair described in notifying
Play module；Match somebody with somebody completion message again comprising switching in the MSG3；When the judged result is that MSG3 has been sent out
It is described to re-establish the delay initiation of process initiation module and re-establish when sending, wait the confirmation ACK of the MSG3
Feedback；When the judged result is that MSG3 is not sent, the process initiation module that re-establishes is initiated immediately
Re-establish process.
It is preferred that, if receiving the ACK feedbacks in preset time T, it is determined that switch successfully, no
Initiate to re-establish process again.If not receiving the ACK feedbacks in preset time T, it is determined that switching
Failure, initiation re-establishes process.
It is preferred that, above-mentioned preset time T reaches maximum re-transmission less than or equal to wireless chain control layer RLC
Time used in number of times.
Solving UE under specific circumstances by above-mentioned technical proposal can switch successfully but because T304 is super
When have to carry out the problem of reconstruction is so as to handoff failure, it is to avoid the defect in existing protocol, improve and cut
Successful probability is changed, the quality of network is improved.
Brief description of the drawings
Fig. 1 improves the basic step flow chart of the method for handover success rate for the present invention；
Fig. 2 is the method flow diagram that the first application example improves handover success rate；
Fig. 3 is the method flow diagram that the second application example improves handover success rate；
Fig. 4 is the method flow diagram that the 3rd application example improves handover success rate；
Fig. 5 is the method flow diagram that the 4th application example improves handover success rate；
Fig. 6 improves the comprising modules figure of the user equipment of handover success rate for the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing
Embodiments of the invention are described in detail.It should be noted that in the case where not conflicting, this Shen
Please in embodiment and the feature in embodiment can mutually be combined.
In correlation technique, under the scene that accesses of non-competing mode of handover trigger, target side Stochastic accessing
The end mark of process is that UE is successfully decoded accidental access response message (also referred to as MSG2) and received up
Authorize.According to agreement, when implementing, uplink authorization (UL grant) is first dealt into bottom by UE, so
Mark the completion of random access procedure again afterwards.If UL grant are just dealt into bottom by UE, now without
Line resources control (Radio Resource Control, abbreviation RRC) connection again with completion message (
Referred to as MSG3) be already prepared to, then it can start transmission immediately, and now T304 is not killed also, then
There is such a case：MSG3 has been sent from, and time-out occurs before being killed for T304, and UE now sentences
Disconnected handoff failure, can then initiate to re-establish process；And eNB sides decode weight because have received MSG3
With completion message, judge that UE switchings complete and are notified that core net UE has been switched successfully；It can be seen that, now
UE and eNB is inconsistent to the judgement for switching successfully or failing, so that cause the exception of follow-up process,
This switching also ends in failure, and reduces success rate.Fig. 1 improves the side of handover success rate for the present invention
The basic step flow chart of method.As illustrated, the method that the present invention improves handover success rate mainly includes：
S101：In T304 timer expiries, UE judges whether MSG3 has sent；If having sent,
Jump to S102；Otherwise S103 is jumped to；
S102：Wait MSG3 confirmation (Acknowledge, abbreviation ACK) feedback；
S103：Initiation re-establishes process.
Match somebody with somebody completion message again comprising switching in above-mentioned MSG3, similarly hereinafter, repeat no more.
If T304 is overtime, UE MSG3 is not sent also, then illustrates that base station can not possibly receive switching
Match somebody with somebody completion message again, also not will be considered that UE is switched successfully, now UE should stop MSG3 transmission, directly
Sending and receiving rise and re-establish process.
If T304 is overtime, UE MSG3 has been sent, then is likely to base station and has received MSG3,
As long as receiving the message base station is judged as UE handover success.Now UE does not initiate to re-establish, and waits letter
Make and match somebody with somebody completion message on radio bearer 1 (Signalling radio bearers, abbreviation SRB1) again
Wireless chain control layer (Radio Link Control, abbreviation RLC) feeds back, if in preset time
RLC ACK feedbacks are have received in T, then illustrate base station it had been thought that UE is switched successfully, and will be UE
Scheduling resource, now UE abandon re-establishing, state is set to handover success, continues to carry out in Target cell
The processing of up-downgoing data transfer.If never being received in preset time T and matching somebody with somebody completion message again
RLC ACK feed back, then illustrate that base station is not received and match somebody with somebody completion message again, now UE and base station side state one
Cause, all think handoff failure, now UE initiates to re-establish process again.
Above-mentioned preset time T can be set smaller than or reached equal to RLC according to the requirement to network delay
To the time used in maximum retransmission.
Using the above method, compared with prior art, solving UE can switch successfully but due to T304
Time-out has to carry out the problem of reconstruction is so as to handoff failure, improves the probability of handover success, improves net
The quality of network.
Above-described embodiment is further described using example below by three.
Fig. 2 is the method flow diagram that the first application example improves handover success rate.As illustrated, this example
The middle method for improving handover success rate comprises the following steps：
S201：UE receives the switching command of source base station transmission, starts T304 timers；T304 timers
Duration basis of design existing protocol；
S202：UE initiating random access procedures, send random access guiding to target BS and (are referred to as：MSG1)；
S203：UE receives the MSG2 from target BS；
S204：T304 timer expiries, UE directly initiates to re-establish process.
Fig. 3 is the method flow diagram that the second application example improves handover success rate.As illustrated, this example
The middle method for improving handover success rate comprises the following steps：
S301：UE receives the switching command of source base station transmission, starts T304 timers；
S302：UE performs random access procedure, and MSG1 is sent to target BS；
S303：UE receives the MSG2 from target BS；
S304：UE sends MSG3 to target BS；
S305：T304 timer expiries, UE judges that MSG3 has been sent, and waits the ACK for matching somebody with somebody completion message again
Feedback；
S306：Above-mentioned ACK feedbacks are received in preset time T, it is determined that switching successfully, state is set to
Switch successfully.Wherein, preset time T reaches the time used in maximum retransmission less than or equal to RLC.
Fig. 4 is the method flow diagram that the 3rd application example improves handover success rate.As illustrated, this example
The middle method for improving handover success rate comprises the following steps：
S401：UE receives the switching command of source base station transmission, starts T304 timers；
S402：UE performs random access procedure, and MSG1 is sent to target BS；
S403：UE receives the MSG2 from target BS；
S404：UE sends MSG3 to target BS；
S405：T304 timer expiries, UE judges that MSG3 has been sent, and waits the ACK for matching somebody with somebody completion message again
Feedback；
S406：Do not receive above-mentioned ACK feedbacks in preset time T, determine handoff failure, initiate weight
Set up process.Wherein, preset time T reaches the time used in maximum retransmission less than or equal to RLC.
Fig. 5 is the method flow diagram that the 4th application example improves handover success rate.As illustrated, this example
The middle method for improving handover success rate comprises the following steps：
S501：UE receives the switching command of source base station transmission, starts T304 timers；
S502：T304 timer expiries, UE judges whether MSG3 has sent；If having sent, redirect
To S503；Otherwise S504 is jumped to；
S503：Wait MSG3 ACK feedbacks；If receiving the ACK feedbacks in preset time T,
Then determine to switch successfully；Otherwise step S504 is jumped to；Wherein, preset time T reaches less than or equal to RLC
To the time used in maximum retransmission.
S504：Initiation re-establishes process.
Fig. 6 improves the user equipment composition module map of handover success rate for the present invention.As illustrated, the use
Family equipment includes：Judge module 01, re-establish process initiation module 02；Wherein judge module 01 is used for
In handoff procedure during T304 timer expiries, judge whether MSG3 has sent；And will determine that result is notified
Re-establish process initiation module 02；When the judged result is that MSG3 has been sent, process initiation is re-established
The delay initiation of module 02 is re-established, and waits MSG3 confirmation ACK feedbacks；When the judged result is MSG3
When not sending, re-establish process initiation module 02 and initiate to re-establish process immediately.
Above-mentioned wait MSG3 ACK feedbacks include：
If receiving the ACK feedbacks in preset time T, switching state is set to handover success,
No longer initiate to re-establish process., will switching if not receiving the ACK feedbacks in preset time T
State is set to handoff failure, and initiation re-establishes process.Wherein, preset time T is less than or equal to radio chains
Circuit control layer RLC reaches the time used in maximum retransmission.
One of ordinary skill in the art will appreciate that all or part of step in the above method can pass through program
To instruct related hardware to complete, described program can be stored in computer-readable recording medium, such as read-only
Memory, disk or CD etc..Alternatively, all or part of step of above-described embodiment can also be used
One or more integrated circuits realize that correspondingly, each module/unit in above-described embodiment can be used
The form of hardware is realized, it would however also be possible to employ the form of software function module is realized.The present invention is not restricted to appoint
The combination of the hardware and software of what particular form.
It should be noted that the present invention can also have other various embodiments, without departing substantially from spirit of the invention and
In the case of its essence, those skilled in the art can make various corresponding changes according to the present invention
And deformation, but these corresponding changes and deformation should all belong to the protection model of appended claims of the invention
Enclose.
Claims (8)
1. a kind of method for improving handover success rate, it is characterised in that methods described includes：Handoff procedure
In, during T304 timer expiries, user equipment (UE) judges whether MSG3 has sent；In the MSG3
Match somebody with somebody completion message again comprising switching；If having sent, the confirmation ACK of the MSG3 is waited to feed back；Otherwise
Initiation re-establishes process.
2. the method as described in claim 1, it is characterised in that the ACK feedbacks of the wait MSG3
Including：If receiving the ACK feedbacks in preset time T, it is determined that switch successfully, no longer initiate
Re-establish process.
3. the method as described in claim 1, it is characterised in that the ACK feedbacks of the wait MSG3
Including：If not receiving the ACK feedbacks in preset time T, it is determined that handoff failure, weight is initiated
Set up process.
4. method as claimed in claim 2 or claim 3, it is characterised in that the preset time T be less than or
The time used in maximum retransmission is reached equal to wireless chain control layer RLC.
5. a kind of user equipment for improving handover success rate, it is characterised in that the user equipment includes：
Judge module, re-establish process initiation module；The judge module, in handoff procedure, T304 to be fixed
When device it is overtime when, judge whether MSG3 has sent；And will determine that result re-establishes process initiation described in notifying
Module；Match somebody with somebody completion message again comprising switching in the MSG3；When the judged result is that MSG3 has been sent
When, it is described to re-establish the delay initiation of process initiation module and re-establish, wait the confirmation ACK of the MSG3
Feedback；When the judged result is that MSG3 is not sent, the process initiation module that re-establishes is initiated immediately
Re-establish process.
6. user equipment as claimed in claim 4, it is characterised in that the ACK of the wait MSG3
Feedback includes：If receiving the ACK feedbacks in preset time T, it is determined that switch successfully, no longer
Initiation re-establishes process.
7. user equipment as claimed in claim 4, it is characterised in that the ACK of the wait MSG3
Feedback includes：If not receiving the ACK feedbacks in preset time T, it is determined that handoff failure, hair
Rise and re-establish process.
8. user equipment as claimed in claims 6 or 7, it is characterised in that the preset time T
The time used in maximum retransmission is reached less than or equal to wireless chain control layer RLC.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112579.XA CN107135522A (en) | 2016-02-26 | 2016-02-26 | A kind of method and user equipment for improving handover success rate |
| PCT/CN2016/108270 WO2017143828A1 (en) | 2016-02-26 | 2016-12-01 | Method and user equipment for improving handover success rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112579.XA CN107135522A (en) | 2016-02-26 | 2016-02-26 | A kind of method and user equipment for improving handover success rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107135522A true CN107135522A (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610112579.XA Pending CN107135522A (en) | 2016-02-26 | 2016-02-26 | A kind of method and user equipment for improving handover success rate |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107135522A (en) |
| WO (1) | WO2017143828A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020020139A1 (en) * | 2018-07-23 | 2020-01-30 | 南京中兴新软件有限责任公司 | Radio access mode handover method, base station, terminal, and readable storage medium |
| CN111918352A (en) * | 2020-08-06 | 2020-11-10 | Oppo广东移动通信有限公司 | Cell switching method, device, terminal and storage medium |
| CN112640522A (en) * | 2018-06-29 | 2021-04-09 | 三星电子株式会社 | Method and apparatus for transmitting and receiving data in wireless communication system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013039435A1 (en) * | 2011-09-16 | 2013-03-21 | Telefonaktiebolaget L M Ericsson (Publ) | Improved contention-free random access procedure in wireless networks |
| CN103200627B (en) * | 2012-01-04 | 2018-05-11 | 中兴通讯股份有限公司 | The method and mobile terminal of conflict are re-established in a kind of solution handoff procedure |
| CN103298048B (en) * | 2012-03-05 | 2018-09-11 | 中兴通讯股份有限公司 | The method and terminal of RRC connection re-establishment numbers in a kind of reduction handoff procedure |
| CN102769849A (en) * | 2012-07-25 | 2012-11-07 | 中兴通讯股份有限公司 | Message sending method and device |
| WO2015051486A1 (en) * | 2013-10-07 | 2015-04-16 | Qualcomm Incorporated | Rach msg3 timeline design in eimta |
-
2016
- 2016-02-26 CN CN201610112579.XA patent/CN107135522A/en active Pending
- 2016-12-01 WO PCT/CN2016/108270 patent/WO2017143828A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112640522A (en) * | 2018-06-29 | 2021-04-09 | 三星电子株式会社 | Method and apparatus for transmitting and receiving data in wireless communication system |
| US12096482B2 (en) | 2018-06-29 | 2024-09-17 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving data in wireless communication system |
| WO2020020139A1 (en) * | 2018-07-23 | 2020-01-30 | 南京中兴新软件有限责任公司 | Radio access mode handover method, base station, terminal, and readable storage medium |
| CN111918352A (en) * | 2020-08-06 | 2020-11-10 | Oppo广东移动通信有限公司 | Cell switching method, device, terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017143828A1 (en) | 2017-08-31 |
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