CN107659969A - The method and device of handover success rate is improved in Rail Transit System - Google Patents
The method and device of handover success rate is improved in Rail Transit System Download PDFInfo
- Publication number
- CN107659969A CN107659969A CN201710830864.XA CN201710830864A CN107659969A CN 107659969 A CN107659969 A CN 107659969A CN 201710830864 A CN201710830864 A CN 201710830864A CN 107659969 A CN107659969 A CN 107659969A
- Authority
- CN
- China
- Prior art keywords
- base station
- terminal
- random access
- source base
- purpose base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H04W36/0011—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
-
- 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
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/20—Performing reselection for specific purposes for optimising the interference level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
Abstract
The present invention provides a kind of method for being used in Rail Transit System improve handover success rate, when switching random access guiding is all detected with frequency handover source base station and purpose base station, only accidental access response is issued in purpose base station, switching flow is initiated in source base station including terminal, source base station and purpose base station all detect the random access guiding MSG1 that terminal is initiated；After source base station receives MSG1, inquiry is local without the dedicated preamble configuration of terminal and contextual information, then does not dispatch corresponding MSG2 and MSG3；After purpose base station receives MSG1, the contextual information of the dedicated preamble configuration sum of the local terminal of inquiry, then corresponding MSG2 and MSG3 are dispatched；Terminal removes the dedicated preamble configuration of purpose base station after handover.The present invention solves the problems, such as handoff failure when same frequency handover source base station and purpose base station all examine random access guiding and all issue accidental access response, improves handover success rate, reduces handover delay.
Description
Technical field
The present invention relates to track traffic moving communicating field, more particularly to a kind of improve switches successfully in Rail Transit System
The improved technology scheme of rate.
Background technology
In LTE Rail Transit Systems, subway can switch between multiple websites, for ensure subway run well and
The packet loss and time delay index of CBTC (train automatic controlling system based on communication) business, it is desirable to which handover success rate reaches
99.98%.Frequency is identical between being stood in Rail Transit System, i.e., is switched with frequency, and two base stations have signal in switching band
Co-channel interference, the reception of user equipment downlink signal can be influenceed.When terminal switches between two base stations, if source base station and purpose base
Stand and all detect the random access guiding of the terminal, two stations are all handled it, issue identical accidental access response money
Source, then the accidental access response signal of two base stations can produce strong co-channel interference, terminal on identical running time-frequency resource
Detection accidental access response signal may fail, and then cause handoff failure, reduce the handover success rate of system, can not meet
Handover success rate hardness index, business packet loss and the exceeded probability of time delay are added, has had a strong impact on whole Rail Transit System
Performance, even resulting in whole system can not run well.
The content of the invention
A kind of the shortcomings that it is an object of the invention to overcome prior art, there is provided improved technology side for improving handover success rate
Case, for the random access guiding for solving all to detect terminal with source base station during frequency switching and purpose base station, and in identical
Issue accidental access response in frequency resource, cause terminal due to downstream signal strong co-channel interference receiving random access response
Failure, and then the problem of handoff failure, improve handover success rate, it is ensured that the performance indications of system and normal operation.
Technical scheme provides a kind of method for being used in Rail Transit System improve handover success rate, same to cut frequently
Change source base station and purpose base station is all detected when switching random access guiding, only issue accidental access response in purpose base station；
Implementation includes performing following steps,
Step 101, terminal initiates switching flow in source base station, and purpose base station establishes terminal contexts and configures the terminal
Dedicated preamble, source base station do not configure the dedicated preamble of the terminal, and source base station and purpose base station all detect what terminal was initiated
Random access guiding MSG1；
Step 102, after source base station receives random access guiding MSG1, inquire about local without the special of the matching terminal
Configured with lead code, and without the contextual information of the terminal, then do not dispatch corresponding accidental access response MSG2 and MSG3；
Step 103, after purpose base station receives random access guiding MSG1, the local existing matching terminal is inquired about
Dedicated preamble configures, and the contextual information of the terminal, then dispatches corresponding accidental access response MSG2 and MSG3；
Step 104, after terminal completes switching flow in purpose base station, if switching successfully, remove purpose base station it is special before
Leading code configures, if handoff failure or the terminal are released, also removes the dedicated preamble configuration of purpose base station.
Moreover, the Rail Transit System is subway.
The present invention also provides a kind of device for being used in Rail Transit System improve handover success rate, with frequency handover source base station
When switching random access guiding is all detected with purpose base station, only accidental access response is issued in purpose base station；
Including with lower module,
First module, switching flow is initiated in source base station for terminal, terminal contexts are established in purpose base station and configuration should
The dedicated preamble of terminal, source base station do not configure the dedicated preamble of the terminal, and source base station and purpose base station all detect terminal
The random access guiding MSG1 of initiation；
Second module, after receiving random access guiding MSG1 for source base station, inquire about local without the matching end
The dedicated preamble configuration at end, and without the contextual information of the terminal, then do not dispatch corresponding accidental access response MSG2 with
MSG3；3rd module, after receiving random access guiding MSG1 for purpose base station, inquire about local existing matching terminal
Dedicated preamble configuration, and the contextual information of the terminal then dispatches corresponding accidental access response MSG2 and MSG3；
4th module, for terminal after purpose website completes switching flow, if switching successfully, remove the dedicated preamble of purpose website
Configuration, if handoff failure or the terminal are released, also remove the dedicated preamble configuration of purpose website.
Moreover, the Rail Transit System is subway.
Prior art is contrasted, the invention provides a kind of technical scheme for improving handover success rate, to solve to switch with frequency
When source base station and purpose base station all detect the random access guiding of terminal, and issue Stochastic accessing on identical running time-frequency resource
Response, causes terminal due to the strong co-channel interference of downstream signal and receiving random access response fails, and then handoff failure
Problem, improve handover success rate, it is ensured that the performance indications of system and normal operation.The beneficial features of the present invention are as follows：
1), the raising handover success rate method, all detect that switching is random using same frequency handover source base station and purpose base station
During access lead, accidental access response only is issued in purpose base station, avoids signal co-channel interference from causing handoff failure, scheme letter
Single, realization is easier, and clear thinking, interactivity is strong, does not influence existing procedure and business.
2), the raising handover success rate method, solves the defects of prior art is present, source base station when solving to switch with frequency
The random access guiding of terminal is all detected with purpose base station, and accidental access response is issued on identical running time-frequency resource, is led
Terminal receiving random access response failure due to the strong co-channel interference of downstream signal is caused, and then the problem of handoff failure, is carried
High handover success rate, it is ensured that the performance indications of system and normal operation, there is practical value.
Present invention is especially suited for but be not limited to subway scene use.
Brief description of the drawings
Fig. 1 is flow chart of the embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, combined below by embodiment
Accompanying drawing is described in further detail to technical solution of the present invention.
After the present invention detects the non-competing random access guiding of switching by base station, with the switching Special leader being locally configured
Code-phase matches, and judges whether the contextual information of the switching terminal, to determine whether base station dispatches accidental access response,
To solve same frequency handover source base station and random access guiding is all examined and when all issuing accidental access response in purpose base station, descending letter
Number co-channel interference causes by force very much the problem of terminal detection accidental access response failure and then handoff failure.
Referring to accompanying drawing 1, if in the LTE Rail Transit Systems of subway, terminal from a website run to another website when,
Corresponding base station is designated as source base station and purpose base station respectively, and the Stochastic accessing based on competitive mode includes 4 steps, corresponding message
MSG1, MSG2, MSG3, MSG4 are usually denoted as, 3 steps are included based on non-competing Stochastic accessing, corresponding message is usually denoted as
MSG1, MSG2, MSG3, embodiment provide method and comprised the steps of：
101) terminal initiates switching flow in source base station, and purpose base station can establish terminal contexts and configure the special of the terminal
With lead code, source base station does not configure the dedicated preamble of the terminal, source base station and purpose base station all detect that terminal initiates with
Machine access lead MSG1；
Specifically, in the step 101), after source base station initiates switching flow, purpose base station can first be established the end terminal
The context at end and the dedicated preamble information for configuring the terminal, source base station and purpose base station all detect that terminal is initiated random
Access lead MSG1.
102) after source base station receives random access guiding MSG1, inquire about it is local without the matching terminal it is special before
Leading code configures, and without the contextual information of the terminal, does not then dispatch corresponding accidental access response MSG2 and MSG3；
Specifically, in the step 102), after source base station receives random access guiding MSG1, inquire about local without therewith
The dedicated preamble configuration for the terminal matched somebody with somebody, and without the contextual information of the terminal, then the random access guiding is not preserved
MSG1, corresponding accidental access response MSG2 and MSG3 is not dispatched yet.
103) after purpose base station receives random access guiding MSG1, the special of the local existing matching terminal is inquired about
Lead code configures, and the contextual information of the terminal, then dispatches corresponding accidental access response MSG2 and MSG3；
Specifically, in the step 103), after purpose base station receives random access guiding MSG1, inquire about locally and have therewith
The dedicated preamble configuration of the terminal of matching, and the contextual information of the terminal, then preserve the random access guiding
MSG1, dispatch corresponding accidental access response MSG2 and MSG3.
104) after terminal completes switching flow in purpose base station, if switching successfully, the dedicated preamble of purpose base station is removed
Configuration, if handoff failure or the terminal are released, also remove the dedicated preamble configuration of purpose base station.
Specifically, in the step 104), after terminal completes switching flow in purpose base station, if switching successfully, need to remove
The dedicated preamble configuration of purpose base station, if handoff failure or the terminal are released, also need to remove the Special leader of purpose base station
Code configuration.If purpose base station is without removing, switch back next time after, two stations can all have proprietary lead code to configure, all
MSG2 and MSG3 can be issued, causes co-channel interference.
Limited by above step, after base station detects the non-competing random access guiding of switching, with the switching being locally configured
Dedicated preamble matches, and judges whether the contextual information of the switching terminal, to determine whether base station dispatches at random
Access response, to solve same frequency handover source base station and purpose base station all examines random access guiding and all issues accidental access response
When, downstream signal co-channel interference causes by force very much terminal detection accidental access response failure and then the problem of handoff failure.It is specific real
Shi Shi, 102) and 103) can carry out side by side, i.e., before switching Stochastic accessing is all detected with frequency handover source base station and purpose base station
When leading, only accidental access response is issued in purpose base station.
When it is implemented, method provided by the present invention can realize automatic running flow based on software engineering, mould can be also used
Block mode realizes corresponding system.The embodiment of the present invention also provides a kind of raising handover success rate being used in Rail Transit System
Device, when all detecting switching random access guiding for same frequency handover source base station and purpose base station, only issued in purpose base station
Accidental access response；
Including setting with lower module,
First module, switching flow is initiated in source base station for terminal, terminal contexts are established in purpose base station and configuration should
The dedicated preamble of terminal, source base station do not configure the dedicated preamble of the terminal, and source base station and purpose base station all detect terminal
The random access guiding MSG1 of initiation；
Second module, after receiving random access guiding MSG1 for source base station, inquire about local without the matching end
The dedicated preamble configuration at end, and without the contextual information of the terminal, then do not dispatch corresponding accidental access response MSG2 with
MSG3；3rd module, after receiving random access guiding MSG1 for purpose base station, inquire about local existing matching terminal
Dedicated preamble configuration, and the contextual information of the terminal then dispatches corresponding accidental access response MSG2 and MSG3；
4th module, for terminal after purpose website completes switching flow, if switching successfully, remove the dedicated preamble of purpose website
Configuration, if handoff failure or the terminal are released, also remove the dedicated preamble configuration of purpose website.
Each module specific implementation can be found in corresponding steps, and it will not go into details by the present invention.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the protection of the present invention
Scope.
Claims (4)
- A kind of 1. method for being used in Rail Transit System improve handover success rate, it is characterised in that：With frequency handover source base station and When purpose base station all detects switching random access guiding, only accidental access response is issued in purpose base station；Implementation includes performing following steps,Step 101, terminal initiates switching flow in source base station, and purpose base station establishes terminal contexts and configures the special of the terminal Lead code, source base station do not configure the dedicated preamble of the terminal, and source base station and purpose base station all detect that terminal is initiated random Access lead MSG1；Step 102, after source base station receives random access guiding MSG1, inquire about it is local without the matching terminal it is special before Leading code configures, and without the contextual information of the terminal, does not then dispatch corresponding accidental access response MSG2 and MSG3；Step 103, after purpose base station receives random access guiding MSG1, the special of the local existing matching terminal is inquired about Lead code configures, and the contextual information of the terminal, then dispatches corresponding accidental access response MSG2 and MSG3；Step 104, after terminal completes switching flow in purpose base station, if switching successfully, the dedicated preamble of purpose base station is removed Configuration, if handoff failure or the terminal are released, also remove the dedicated preamble configuration of purpose base station.
- 2. the method for being used in Rail Transit System improve handover success rate according to claim 1, it is characterised in that：It is described Rail Transit System is subway.
- A kind of 3. device for being used in Rail Transit System improve handover success rate, it is characterised in that：With frequency handover source base station and When purpose base station all detects switching random access guiding, only accidental access response is issued in purpose base station；Including with lower module,First module, switching flow is initiated in source base station for terminal, purpose base station establishes terminal contexts and configures the terminal Dedicated preamble, source base station do not configure the dedicated preamble of the terminal, and source base station and purpose base station all detect that terminal is initiated Random access guiding MSG1；Second module, after receiving random access guiding MSG1 for source base station, inquire about local no matching terminal Dedicated preamble configures, and without the contextual information of the terminal, does not then dispatch corresponding accidental access response MSG2 and MSG3；3rd module, after receiving random access guiding MSG1 for purpose base station, inquire about local existing matching terminal Dedicated preamble configuration, and the contextual information of the terminal then dispatches corresponding accidental access response MSG2 and MSG3；4th module, for terminal purpose website complete switching flow after, if switch successfully, remove purpose website it is special before Leading code configures, if handoff failure or the terminal are released, also removes the dedicated preamble configuration of purpose website.
- 4. it is used in Rail Transit System improve the device of handover success rate according to claim 3, it is characterised in that：It is described Rail Transit System is subway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830864.XA CN107659969B (en) | 2017-09-15 | 2017-09-15 | Method and device for improving switching success rate in rail transit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830864.XA CN107659969B (en) | 2017-09-15 | 2017-09-15 | Method and device for improving switching success rate in rail transit system |
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| CN107659969A true CN107659969A (en) | 2018-02-02 |
| CN107659969B CN107659969B (en) | 2020-09-08 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155415A (en) * | 2006-09-29 | 2008-04-02 | 中兴通讯股份有限公司 | Switching access method and apparatus based on random access channel |
| CN101932106A (en) * | 2010-09-03 | 2010-12-29 | 华为技术有限公司 | Random access method, user equipment, cell control equipment and system |
| CN101990311A (en) * | 2010-12-10 | 2011-03-23 | 中国海洋大学 | virtual lead code based random access method of wireless mobile broadband system |
| CN102123462A (en) * | 2011-03-21 | 2011-07-13 | 中兴通讯股份有限公司 | Method and LTE (long term evolution) system for across node B handover of user terminal |
| WO2012134178A3 (en) * | 2011-04-01 | 2013-01-03 | Pantech Co.,Ltd. | Handover apparatus and method for avoiding in-device coexistence interference |
| US20130223409A1 (en) * | 2010-11-05 | 2013-08-29 | Lg Electronics Inc. | Method for Performing Handover in Wireless Communication System |
| CN103826318A (en) * | 2014-01-26 | 2014-05-28 | 北京邮电大学 | Macro base station and micro base station combined random access method and equipment |
| CN104254092A (en) * | 2013-06-26 | 2014-12-31 | 华为技术有限公司 | Interference detection method and system, and apparatuses |
| CN104994551A (en) * | 2015-07-14 | 2015-10-21 | 武汉邮电科学研究院 | Configuration switching method of LTE (Long Term Evolution) system under high-speed mobile context |
| US20150319774A1 (en) * | 2014-05-05 | 2015-11-05 | Blackberry Limited | Identifying a subframe containing information relating to an uplink grant |
| CN105704673A (en) * | 2016-04-15 | 2016-06-22 | 武汉虹信通信技术有限责任公司 | Method for rail transit wireless data transmission based on LTE |
| CN106792556A (en) * | 2016-12-08 | 2017-05-31 | 武汉虹信通信技术有限责任公司 | Serving cell switching handling method under a kind of track traffic scene |
-
2017
- 2017-09-15 CN CN201710830864.XA patent/CN107659969B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155415A (en) * | 2006-09-29 | 2008-04-02 | 中兴通讯股份有限公司 | Switching access method and apparatus based on random access channel |
| CN101932106A (en) * | 2010-09-03 | 2010-12-29 | 华为技术有限公司 | Random access method, user equipment, cell control equipment and system |
| US20130223409A1 (en) * | 2010-11-05 | 2013-08-29 | Lg Electronics Inc. | Method for Performing Handover in Wireless Communication System |
| CN101990311A (en) * | 2010-12-10 | 2011-03-23 | 中国海洋大学 | virtual lead code based random access method of wireless mobile broadband system |
| CN102123462A (en) * | 2011-03-21 | 2011-07-13 | 中兴通讯股份有限公司 | Method and LTE (long term evolution) system for across node B handover of user terminal |
| WO2012134178A3 (en) * | 2011-04-01 | 2013-01-03 | Pantech Co.,Ltd. | Handover apparatus and method for avoiding in-device coexistence interference |
| CN104254092A (en) * | 2013-06-26 | 2014-12-31 | 华为技术有限公司 | Interference detection method and system, and apparatuses |
| CN103826318A (en) * | 2014-01-26 | 2014-05-28 | 北京邮电大学 | Macro base station and micro base station combined random access method and equipment |
| US20150319774A1 (en) * | 2014-05-05 | 2015-11-05 | Blackberry Limited | Identifying a subframe containing information relating to an uplink grant |
| CN104994551A (en) * | 2015-07-14 | 2015-10-21 | 武汉邮电科学研究院 | Configuration switching method of LTE (Long Term Evolution) system under high-speed mobile context |
| CN105704673A (en) * | 2016-04-15 | 2016-06-22 | 武汉虹信通信技术有限责任公司 | Method for rail transit wireless data transmission based on LTE |
| CN106792556A (en) * | 2016-12-08 | 2017-05-31 | 武汉虹信通信技术有限责任公司 | Serving cell switching handling method under a kind of track traffic scene |
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Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430073 Hubei province Wuhan Dongxin East Lake high tech Development Zone, Road No. 5 Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |