CN101808354B - Method for detecting and switching failure scene based on mobile terminal information - Google Patents
Method for detecting and switching failure scene based on mobile terminal information Download PDFInfo
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- CN101808354B CN101808354B CN 201010120790 CN201010120790A CN101808354B CN 101808354 B CN101808354 B CN 101808354B CN 201010120790 CN201010120790 CN 201010120790 CN 201010120790 A CN201010120790 A CN 201010120790A CN 101808354 B CN101808354 B CN 101808354B
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Abstract
The invention discloses a method for detecting and switching a failure scene based on mobile terminal information, which mainly solves the problems of the inaccuracy and the incompleteness of the detection for switching the failure scene in the mobile robustness optimization in the conventional SON. The method mainly comprises the following contents: 1, modifying reestablishment connection request information, adding a former cell field, and adding options of coverage hole and other RLF to a request connection reason field; and 2, receiving the reestablishment connection request information by using a target base station; reading a value of the request connection reason field, and if the value is the other RLF, determining that the link failure is resulted from irrationality switching of the parameter; reading the former cell field, and if the value is 0, switching the failure scene in a mode that the switching is triggered too late; if the value is the same as a local cell ID, switching the failure scene in the mode that the switching is triggered to early; and if the value is different from the local cell ID, then switching the failure scene in the mode that the failure scene isswitched to an error cell. The method is applied to parameter optimization of a cellular network for improving network performance.
Description
Technical field
The present invention relates to wireless communication field; Be particularly related to the optimization of self-organizing network SON in the 3G (Third Generation) Moblie Long Term Evolution 3GPP LTE system; Be exactly to propose a kind of detection method specifically, can be used in the mobile robustness optimization process of sub-district switching failure scene in the mobile robustness optimization.
Background technology
Present 2G/3G system adopts the manual configuration handoff parameter, and this is the task of a spended time, under a lot of scenes, because cost does not remove to upgrade handoff parameter later in initialization too greatly.In some cases, the RRM in base station can detect problem and adjust moving parameter, but some example is that the RRM in the base station is insurmountable.
Incorrect parameter configuration can cause switching the table tennis Radio Link Failure relevant with handoff failure, thereby has passive influence to waste Internet resources simultaneously to user's impression.Owing to do not produce the handoff failure of Radio Link Failure, user's impression less than, be the switching failure scene that produces Radio Link Failure so mobile robustness optimization at first will consider.But, though handoff parameter can cause the degradation of service not because of the optimization configuration causes Radio Link Failure, as: the sluggish coefficient of incorrect switching is to produce ping-pong and the reason that be connected of prolongation with non-optimum subdistrict; Therefore second target of mobile robustness optimization is to reduce because unnecessary or miss and switch and cause the invalid use of Internet resources.
The relevant failure scene of existing switching can be divided into: the link failure scene that handover trigger causes excessively evening, the link failure scene that handover trigger causes too early and switch to the link failure scene that wrong cell causes.Wherein:
Handover trigger is late excessively, is meant that the speed of portable terminal has surpassed the permissible value that handoff parameter is provided with, the low generation Radio Link Failure of attending the meeting of the signal strength signal intensity of former sub-district, and switching just is triggered, and perhaps switching also is not triggered, and Radio Link Failure has just taken place.In other words, switching evening is exactly a kind of Radio Link Failure that before handover trigger or in handoff procedure, produced, the Radio Link Failure scene that while portable terminal and another sub-district connect.Present detection method: because Radio Link Failure is to occur in former sub-district to receive before the signal measurement report of portable terminal transmission; Former sub-district can not know taken place to switch the evening; Therefore; If after Radio Link Failure has taken place in the A sub-district, be connected to the B sub-district, then the B sub-district need be to Radio Link Failure report of A cell report, and A can detect owing to switched the scene that cause link failure evening.
Handover trigger is too early; Be meant that portable terminal gets into an isolated island in the Serving cell coverage; But this isolated island is included in another sub-district, the too early switching in terminal that can be moved, and this situation mainly occurs in intensive urban area; Promptly in portable terminal success and very short time after Target cell is connected, Radio Link Failure has taken place, portable terminal is connected to former sub-district again.Present detection method: since at A in the too early incident of the switching of B; A can receive that B sends out the Radio Link Failure report; A can think taken place to switch evening, guarantees the stability of mobile robustness optimization function in network for fear of such situation, therefore; If B is after A sends release mobile-terminal text information, at T
Store_UE_cntxtReceive in second from A about the report of the Radio Link Failure of same portable terminal, then B returns an indication too early message that switches to A, A can detect through this information and switch too early scene.
Switch to wrong cell; Be meant that sub-district individual character offset parameter is incorrect; Though switching time is right; But can switch to the sub-district of a mistake, that is: Radio Link Failure has taken place in the very short time after portable terminal successfully is connected to Target cell, and portable terminal is connected to the 3rd sub-district that is not former sub-district and Target cell again.Also there is not testing mechanism at present.
In addition, the unwanted switching of mismatching the meeting generation of the reselecting parameters of sub-district and handoff parameter increases switching times, reduces network resource utilization, need go to avoid to the function of parameter adjustment through mobile robustness optimization.Wherein, unwanted switching was meant in the very short time after portable terminal makes a call, and need switch to the scene of another sub-district.
At present for the detection of the relevant failure scene of the above switching acquired information that all is the base station through analyzing oneself and make judgement; But because the resulting information of mobile terminal in base station may not be accurate; The judgement of making possibly be a mistake, thereby influences the adjustment of parameter, promptly possibly adjust parameter in the opposite direction; Not only can not improve systematic function, systematic function is worsened more.
Summary of the invention
The present invention be directed to inaccuracy and imperfection that present detection method exists, propose a kind of method, to realize correct judgement switching failure scene based on information of mobile terminal detection switching failure scene.
To achieve these goals, the present invention includes following steps:
(1) after Radio Link Failure takes place, portable terminal generates RRCConnectionReestablishment Request Message information according to self detection information and recorded information, sends to target BS;
(2) after target BS receives RRCConnectionReestablishment Request Message information, read the value of ReestablishmentCause and forwardCellId field in the information;
(3) target BS is according to the value of ReestablishmentCause field; Judge the reason that Radio Link Failure takes place between portable terminal and the former Serving cell; If the value of ReestablishmentCause field is coveragehole; Then Radio Link Failure is former because cover leak, if the value otherRLF of ReestablishmentCause field, then Radio Link Failure is former because handoff parameter is unreasonable;
(4) target BS judge take place the Radio Link Failure reason be handoff parameter unreasonable after; Value according to the forwardCellId field is judged switching failure scene; If the value of forwardCellId field is 0, switching failure scene is that handover trigger is late excessively, if the value of forwardCellId field is identical with this sub-district ID; Switching failure scene is that handover trigger is too early; If the value of forwardCellId field is different with this sub-district ID, switching failure scene is accomplished and is detected handoff procedure for switching to wrong cell.
The described portable terminal of above-mentioned steps (1) generates RRCConnectionReestablishment RequestMessage information; Comprise C-RNTI, physCellId, forwardCellId and ReestablishmentCause field; Wherein, The value of C-RNTI field is the positional information of portable terminal; The value of physCellId field is the sub-district ID that belongs to when Radio Link Failure takes place, and the forwardCellId field is to need new field of adding, and refers to take place the previous sub-district ID that once served for portable terminal of the sub-district at Radio Link Failure place; The value representation request of ReestablishmentCause field rebulids the reason of connection, increases coverage hole and two options of other RLF in this ReestablishmentCause field.
The described portable terminal of above-mentioned steps (1) generates RRCConnectionReestablishment RequestMessage information; Be the measured value of base station signal to be filled in the reason of asking to rebulid connection according to portable terminal; If the measured value of base station signal all is lower than threshold value; Then the value of ReestablishmentCause field is selected coverage hole, if the signal of base station measured value is higher than threshold value, then the value of ReestablishmentCause field is selected other RLF.
The described portable terminal of above-mentioned steps (1) generates RRCConnectionReestablishment RequestMessage information; Be to fill in corresponding field according to own information recorded; If the portable terminal time resident in the sub-district surpasses the shortest residence time; Then with the value zero setting of forwardCellId field, the time resident in the sub-district as if portable terminal does not surpass the shortest residence time, then the respective cell ID in the filling records information in the forwardCellId field.
The present invention compared with prior art has following advantage:
Existing detection method about handoff failure mainly realizes through interactive information between the base station at present; Information interaction repeatedly can be with causing losing of information; The information of transmitting simultaneously is the testing result of base station oneself, thereby inaccurate, thereby causes the incorrect of scene detection results.Target BS of the present invention is because the information of utilizing portable terminal in RRCConnectionReestablishment Request Message information, to provide directly detects the scene of handoff failure; More accurate than the base station like this through the information detection of oneself; Simultaneously need not pass through X2 interface pass-along message; Thereby can reduce Signalling exchange, and shorten detection time, make testing result more accurately with reliable.
Description of drawings
Fig. 1 is the flow chart that target BS of the present invention detects switching failure scene.
Fig. 2 is the procedure chart that portable terminal of the present invention generates RRCConnectionReestablishment RequestMessage information;
Fig. 3 is the RRCConnectionReestablishment RequestMessage information format figure that portable terminal of the present invention generates;
Embodiment
With reference to Fig. 1, the present invention comprises the steps: the detection of switching failure scene
Radio Link Failure is taking place in step 1, and portable terminal loses and will generate RRCConnectionReestablishment Request Message information after serving BS is connected, and process of this generation information is following with reference to Fig. 2:
(1a) portable terminal loses with after serving BS is connected; Read the own base station signal detection list that the input of peripheral base station is generated; If all base station signal measured values all are lower than threshold value in the tabulation, show that the reason that Radio Link Failure takes place is to cover leak, the field ReestablishmentCause of information selects coverage hole; If exist the base station signal measured value to be higher than threshold value in the tabulation; It is unreasonable to show that then the reason that Radio Link Failure takes place is that handoff parameter is provided with, and portable terminal is not correctly switched to other sub-districts, and field ReestablishmentCause selects other RLF;
(1b) portable terminal through self timer obtain own in current sub-district the resident time; If residence time is greater than the resident shortest time of portable terminal sub-district of regulation; Portable terminal will be left out a last Serving cell ID, in the forwardCellId of information field, write 0 value; If residence time is less than the resident shortest time of portable terminal sub-district of regulation, portable terminal will be preserved a Serving cell ID, write this sub-district ID in the forwardCellId of information field;
(1c) portable terminal is by the C-RNTI and the physCellId field of original standard write information; Accomplish the generation of RRCConnectionReestablishment Request Message information; This information format such as Fig. 3; It comprises C-RNTI, physCellId, forwardCellId and ReestablishmentCause field; Wherein, the C-RNTI field is the positional information in the sub-district of portable terminal, and the physCellId field is the sub-district ID at portable terminal place when Radio Link Failure takes place; The forwardCellId field is to need new field of adding; The previous of sub-district that refers to generation Radio Link Failure portable terminal place was the sub-district ID of portable terminal service once, and the ReestablishmentCause field representes that mobile terminal request rebulids the reason of connection, in this ReestablishmentCause field, increases coverage hole and two options of other RLF.
Step 2, portable terminal are sent this information to target BS after generating RRCConnectionReestablishment Request Message information, and request connects with target BS.
After step 3, target BS are received RRCConnectionReestablishment Request Message information, read the value of ReestablishmentCause and forwardCellId field in the information.
Step 4; Target BS is judged the reason that Radio Link Failure takes place between portable terminal and the former Serving cell, if the value of ReestablishmentCause field is coverage hole according to the value of ReestablishmentCause field; Then target BS judges that the reason of Radio Link Failure is to cover leak; The permission portable terminal inserts, and sends access information to portable terminal, reports to the RRM center simultaneously; If the value of ReestablishmentCause field is other RLF, then to judge that the Radio Link Failure reason is that handoff parameter is provided with unreasonable for target BS, and the base station gets into next step detection; If the value of ReestablishmentCause field is other values, then target BS only needs to send the response signal that comprises the required information that connects to portable terminal.
Step 5; Target BS judge take place the Radio Link Failure reason be handoff parameter unreasonable after, judge switching failure scene according to the value of forwardCellId field, if the value of forwardCellId field is 0; Show portable terminal at former Serving cell residence time greater than the shortest residence time; Because of in time not switched, the Radio Link Failure that just causes, target BS judge that the reason of Radio Link Failure is that handover trigger is late excessively; If the value of forwardCellId field is non-vanishing; The value of contrast forwardCellId field and oneself sub-district ID, if identical, explain that portable terminal switches to former Serving cell after; Radio Link Failure took place in the very short time; Request connects with this sub-district, and then target BS judges that the reason of Radio Link Failure is that handover trigger is too early, if the value of forwardCellId field is different with the sub-district ID of oneself; Explain that portable terminal switches to former Serving cell from the 3rd sub-district; And in the resident very short time of former Serving cell Radio Link Failure has just taken place, taken place to hope and oneself to connect that this just shows that portable terminal is not directly switch to proper cell from the 3rd sub-district behind the Radio Link Failure; But by the wrong former Serving cell that switches to, target BS judges that the reason that Radio Link Failure takes place is to switch to wrong cell.
Terminological interpretation
3GPP:3rd Generation Partnership Project, third generation partner program;
LTE:Long Term Evolution, Long Term Evolution;
SON:Self-Organized Network, self-organizing network;
RRM:Radio Resource Management, RRM.
Claims (1)
1. the method based on information of mobile terminal detection switching failure scene comprises the steps:
(1) after Radio Link Failure takes place, portable terminal generates RRCConnectionReestablishment Request Message information according to self detection information and recorded information, sends to target BS;
(2) after target BS receives RRCConnectionReestablishment Request Message information, read field ReestablishmentCause and forwardCellId value in the information;
(3) target BS is judged the reason that Radio Link Failure takes place between portable terminal and the former Serving cell according to the value of ReestablishmemCause field, if the value of ReestablishmentCause field is coverage hole,
Then Radio Link Failure is former because cover leak, if the value other RLF of ReestablishmentCause field, then Radio Link Failure is former because handoff parameter is unreasonable;
(4) target BS judge take place the Radio Link Failure reason be handoff parameter unreasonable after; Value according to the forwardCellId field is judged switching failure scene; If the value of forwardCellId field is 0, switching failure scene is that handover trigger is late excessively, if the value of forwardCellId field is identical with this sub-district ID; Switching failure scene is that handover trigger is too early; If the value of forwardCellId field is not 0 and different with this sub-district ID, switching failure scene is accomplished and is detected handoff procedure for switching to wrong cell;
Wherein, The RCConnectionReestablishment Request Message information that the described portable terminal of step (1) generates; Comprise C-RNTI, physCellId, forwardCellId and ReestablishmentCause field; The value of C-RNTI field is the positional information of portable terminal; The value of physCellId field is the sub-district ID that belongs to when Radio Link Failure takes place, and the value of forwardCellId field is the field of newly adding, and the previous sub-district ID that once served for portable terminal of the sub-district at Radio Link Failure place takes place in indication; The value representation request of ReestablishmentCause field rebulids the reason of connection, increases coverage hole and two options of other RLF in this ReestablishmentCause field;
Said portable terminal generates RRCConnectionReestablishment Request Message information according to self detection information and recorded information, specifically comprises:
One; The measured value of base station signal is filled in the reason of asking to rebulid connection according to portable terminal; If the measured value of base station signal all is lower than threshold value; Then the value of ReestablishmentCause field is selected coverage hole, if the signal of base station measured value is higher than threshold value, then the value of ReestablishmentCause field is selected other RLF;
Two; Fill in corresponding field according to own information recorded; If the portable terminal time resident in the sub-district surpasses the shortest residence time; Then with the value zero setting of forwardCellId field, the time resident in the sub-district as if portable terminal does not surpass the shortest residence time, then the respective cell ID in the filling records information in the forwardCellId field.
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| CN 201010120790 CN101808354B (en) | 2010-03-09 | 2010-03-09 | Method for detecting and switching failure scene based on mobile terminal information |
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| CN 201010120790 CN101808354B (en) | 2010-03-09 | 2010-03-09 | Method for detecting and switching failure scene based on mobile terminal information |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101951629B (en) * | 2010-09-21 | 2012-10-10 | 东南大学 | Method for detecting cell coverage loopholes and switching errors |
| CN102448079B (en) * | 2010-10-14 | 2015-05-20 | 中兴通讯股份有限公司 | Method and device for determining failure cause of radio link |
| CN103190169B (en) * | 2010-11-30 | 2016-03-30 | 富士通株式会社 | Report the method for radio link failure information, terminal equipment and base station |
| CN102123427B (en) * | 2011-01-24 | 2015-10-21 | 中兴通讯股份有限公司 | A kind of detection covers empty method, SON center |
| CN102883361B (en) * | 2011-07-15 | 2016-04-06 | 华为技术有限公司 | The method and apparatus of reporting district information and cell mobility parameter adjustment |
| CN102932821B (en) * | 2011-08-11 | 2017-10-13 | 中兴通讯股份有限公司 | A kind of terminal reports the method, system and terminal of radio link failure report |
| CN110267289B (en) * | 2011-12-23 | 2022-10-11 | 北京三星通信技术研究有限公司 | Method for detecting reason of radio link failure or switching failure |
| CN103188744B (en) * | 2011-12-30 | 2015-12-02 | 华为技术有限公司 | The method of radio communication, subscriber equipment and system |
| MX336069B (en) * | 2012-01-20 | 2016-01-06 | Fujitsu Ltd | Method for analyzing link failure cause, and network optimizing method and device thereof. |
| CN102547764B (en) * | 2012-02-01 | 2014-09-10 | 电信科学技术研究院 | Method, system and device for improving mobile robustness |
| CN102821410B (en) * | 2012-08-20 | 2016-02-03 | 北京北方烽火科技有限公司 | Handoff failure last type of analysis methodologies and base station in a kind of LTE system |
| EP2954725A4 (en) * | 2013-02-06 | 2016-09-21 | Ericsson Telefon Ab L M | An enhanced solution for handover |
| CN104811967B (en) * | 2014-01-27 | 2019-08-30 | 中兴通讯股份有限公司 | Mobile robustness optimization method, base station and terminal under a kind of more covering scenes |
| CN105282801A (en) * | 2014-07-25 | 2016-01-27 | 中兴通讯股份有限公司 | RRC reestablishment and original service cell confirmation method, target base station, terminal and system |
| CN108462981A (en) * | 2017-02-17 | 2018-08-28 | 中兴通讯股份有限公司 | The detection method and device of pingpang handoff |
| CN113973292B (en) * | 2020-07-24 | 2023-09-08 | 大唐移动通信设备有限公司 | Method for reporting mobility information and UE |
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| US9060316B2 (en) * | 2007-01-10 | 2015-06-16 | Qualcomm Incorporated | Radio resource connection (RCC) establishment for wireless systems |
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| CN1605220A (en) * | 2001-12-07 | 2005-04-06 | 艾利森电话股份有限公司 | Mobile terminal for optimal spectrum utilization in cellular systems |
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| CN101483927A (en) * | 2008-01-08 | 2009-07-15 | 华为技术有限公司 | Method and apparatus for detecting wireless link failure, and reducing failure loss of wireless link |
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