CN106937338A - Link re-establishment method and system - Google Patents

Abstract

The present invention proposes a kind of link reselecting method and system, is related to wireless communication field.Wherein, link re-establishment method of the invention, including：Base station receives the RRC reconstruction request messages for carrying out self terminal, and the extension carrier information of Radio Link Failure occurs in extension carrier wave including instruction terminal；Extension carrier information is added in base station in the handover report information of the cell own base station that Radio Link Failure occurs is sent to, and the cell extension carrier wave wireless link failure situation of the generation Radio Link Failure is determined so as to the cell own base station that Radio Link Failure occurs.By such method, when terminal is when carrier wave generation Radio Link Failure is extended, the cell own base station that Radio Link Failure occurs can determine the carrier type that Radio Link Failure occurs, so as to provide data basis to perform adjustment reduction Radio Link Failure probability.

Description

Link re-establishment method and system

Technical field

The present invention relates to wireless communication field, particularly a kind of link re-establishment method and system.

Background technology

In current LTE/LTE-A agreements, LTE single carrier bandwidth only supports 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, Several configurations such as 20MHz, but during actual LTE frequencies are backsetted, operator finds 2G/3G systems (such as GSM/ The carrier bandwidths sum of multiple frequencies WCDMA/CDMA2000) is not the integral multiple of the bandwidth of LTE definition, therefore this feelings Condition necessarily result in the waste of the frequency resource in operator's hand.

In order to solve the above problems, the company and operator of some GSM/WCDMA carry in the standardization effort of 3GPP R13 The concept of " flexible bandwidth " is gone out, it is desirable in the case where network and terminal transparency is not influenceed, operator can be more flexible The existing frequency resource of use, promote the frequency of 2G/3G to backset work.Current these companies just promote " spirit in 3GPP plenary sessions The project verification work of bandwidth living " technology.

The principle of " flexible bandwidth " is as shown in Figure 1.For a bandwidth of descending 7MHz, base station side is all entered in whole 7MHz The transmitting of row signal, for not supporting the conventional terminal of " flexible bandwidth ", its bandwidth that can only operate in traditional 5MHz On, remaining 2MHz bandwidth resources are unusable for conventional terminal.For supporting the terminal of " flexible bandwidth ", Can be operated in above traditional 5MHz and extension 5MHz.The 5MHz frequencies that so the old and new's terminal can work different On, so as to solve the compatibility issue of carrier wave.We do not support that the carrier wave that the terminal of flexible bandwidth is accessed is called main carrier, Specify according to 3GPP R12 and before in version on the carrier wave, the public of transmitting correlation, user's signal specific and related letter Road information.The carrier wave that we do not support the terminal of flexible bandwidth and cannot access is called extension carrier wave, wherein in the non-of extension carrier wave On overlapping region, as shown in Fig. 2 base station does not send traditional descending common control signal, PBCH (Physical Broadcast Channel, Physical Broadcast Channel), synchronizing signal etc., but still send CRS (Common Reference Signal, it is public Reference signal).Terminal works extend carrier wave when, by reading ePDCCH (enhanced Physical Downlink Control Channel, strengthen downlink physical control channel) obtain the schedule information and feedback information of base station side.

After it there is Radio Link Failure in terminal, it is necessary first to carry out cell reselection to select suitable cell to be stayed Stay, and RRC connection reconstruction processes are sent in suitable cell, rebuild in request message, carrying following information is used to recognize User identity：

RRCConnectionReestablishmentRequest message

Be can see from above- mentioned information, the identification information of terminal includes the C-RNTI of user, Radio Link Failure Cell ID and encrypted authentication information ShortMAC-I.

Rebuild cell to be notified according to situation about rebuilding, using X2 handover information Handover Report to Radio Link Failure cell, failure cell can adjust wireless parameter so as to realize the optimization of wireless performance according to statistics, from following table As can be seen that containing unsuccessfully ECGI information of cell etc. in Handover Report message.

Table 1Handover Report message

According to above-mentioned message it is known that in the case of introducing extension carrier wave in a network, network side cannot determine wirelessly The carrier type of link failure, i.e., during the MRO of RRC connection reconstructions and SON, interactive information all only only fails The mark (such as PCI or ECGI information) of cell, because extension carrier wave and main carrier may from planning angle and pilot frequency design Using identical PCI and ECGI information, therefore it is in main carrier or extension that network and Target cell all cannot be distinguished by failure Produced on carrier wave, because extension carrier wave is easily disturbed near other systems by other systems, it is thus possible to have higher Call drop probability produce.

The content of the invention

The scheme of the carrier type of Radio Link Failure is known it is an object of the present invention to provide a kind of base station.

According to an aspect of the present invention, a kind of link re-establishment method is proposed, including：Base station receives carrys out the wireless of self terminal Resources control RRC rebuilds request message, wherein, RRC rebuilds request message to be included extending carrier information, and extension carrier information refers to Show that terminal occurs Radio Link Failure in extension carrier wave；Base station rebuilds whether request message judges Radio Link Failure according to RRC Occur rebuilding cell；If Radio Link Failure is not occur rebuilding cell, base station is being sent to generation Radio Link Failure Cell own base station handover report information in add extension carrier information, so as to there is Radio Link Failure cell belonging to Base station determines the cell extension carrier wave wireless link failure situation that Radio Link Failure occurs；If Radio Link Failure occurs in weight Cell is built, then the extension carrier information that base station is rebuild in request message according to RRC determines to rebuild the extension carrier wave wireless chain of cell Road failure scenarios.

Alternatively, also include：The terminal for residing in extended frequency band is attempted carrying out in the case where there is Radio Link Failure Cell is rebuild in cell process of reconstruction, gravity treatment configuration information selection of the terminal in broadcast message, and sends RRC to cell is rebuild Rebuild request message.

Alternatively, gravity treatment configuration information includes, by the unidirectional gravity treatment configuration information of extension carrier wave gravity treatment to main carrier, staying The terminal of extended frequency band is stayed in the case where there is Radio Link Failure, according to unidirectional gravity treatment configuration information, configurating terminal is stayed The extension carrier wave for staying is lowest priority and starts reselection timer timing, selected according to frequency priority in preset time range Select suitable Target cell；If find being adapted to resident Target cell, gravity treatment terminal is resident to Target cell；If terminal is pre- If failing to find in time range and being adapted to resident Target cell, then terminal selects suitable mesh by performing cell search process Mark cell is resident.

Alternatively, also include：The cell own base station that Radio Link Failure occurs rebuilds request according to the RRC for carrying out self terminal Message, or there is the Radio Link of the cell of Radio Link Failure from the handover report Information Statistics for rebuilding cell own base station Failure information, radio link failure information includes the time that Radio Link Failure occurs, carrier type, rebuilds cell ID and mistake Lose cell ID；If RRC rebuilds request message or handover report information to include extending carrier information, it is determined that Radio Link loses Generation is lost in extension carrier wave.

Alternatively, there is the cell own base station of Radio Link Failure according to radio link failure information, the pre- timing of statistics It is interior to occur extending the Radio Link Failure number of times of carrier wave in the Radio Link Failure number of times of main carrier and generation；Occur wireless The cell own base station of link failure calculates Radio Link Failure ratio of the cell in extension carrier wave, nothing of the cell in extension carrier wave Wired link failure ratio is the ratio that total frequency of failure occurs to be accounted in the Radio Link Failure number of times of extension carrier wave；Generation radio chains The cell own base station reporting subdistrict of road failure is extending the nothing of carrier wave in the Radio Link Failure ratio of extension carrier wave and generation The wired link frequency of failure is to network management system.

Alternatively, also include：Network management system judges small according to the extension carrier wave wireless link failure ratio obtained from base station Whether area exceedes predetermined failure thresholding in the Radio Link Failure ratio of extension carrier wave；If exceeding predetermined failure thresholding, to hair The cell own base station of raw Radio Link Failure sends schedule information, will pass through schedule information adjustment handoff parameter or control base Station avoids for Cell Edge User being dispatched to extension carrier wave.

Alternatively, handoff parameter includes main carrier handoff parameter and extension carrier switch parameter；Wherein, main carrier switching ginseng Number is switched to the decision threshold of neighbor cell main carrier for terminal from the main carrier of this base station cell；Extending carrier switch parameter is Terminal extends the decision threshold of carrier wave or main carrier from the extension carrier switch of this base station cell to neighbor cell；Network management system is led to Cross the extension carrier switch parameter that schedule information control base station adjusts base station.

Alternatively, also include：Network management system opens travelling performance optimization function, and instruction message is issued to base station；Base station root According to indicate message open mobility optimization function, to be operated in extension carrier wave or needs be switched to extension carrier wave terminal issue RRC configures message, and RRC configurations message includes that mobility distributes information rationally；Terminal is held according to the mobility information of distributing rationally Row extension carrier wave measurement operation, the Reference Signal Received Quality RSRQ and reference signal of cell extension carrier wave where measuring terminals connect Receive power RSRP；When the terminal for being operated in extension carrier wave occurs Radio Link Failure, terminal rebuilds request message by RRC will The RSRQ and RSRP that the cell of Radio Link Failure occurs report base station.

Alternatively, the mobility information of distributing rationally includes：Extension carrier wave measurement indicate, be operated in extension carrier wave or need by It is switched to the extension carrier parameter of the terminal of extension carrier wave cell according to where extension carrier wave measurement indicates measurement；Measurement reports finger Show, be operated in extension carrier wave or need the terminal for being switched to extension carrier wave to report instruction to be lost in generation Radio Link according to measurement Request message report measurement results are rebuild by RRC when losing；Measurement amount, measurement amount includes RSRP and/or RSRQ.

Alternatively, also include：Extension carrier wave from base station to cell where network management system reporting terminal RSRQ and RSRP；If net Guard system judges that cell exceedes predetermined failure thresholding in the Radio Link Failure ratio of extension carrier wave, then, network management system is by RSRQ Information compares RSRP information with predetermined RSRP thresholdings compared with RSRQ thresholdings；If RSRQ information is less than predetermined RSRQ Limit, and RSRP information is higher than predetermined RSRP thresholdings, then network management system avoids using cell edge by schedule information control base station Family is dispatched to extension carrier wave；If RSRQ information is higher than predetermined RSRQ thresholdings, and RSRP information is less than predetermined RSRP thresholdings, then webmaster System adjusts extension carrier switch parameter by schedule information control base station.

Alternatively, also include supporting the adjacent cell list of extension carrier wave measurement in RRC configurations message；Terminal measurement RRC matches somebody with somebody Extension carrier wave RSRP, RSRQ of adjacent cell in the adjacent cell list of the support extension carrier wave measurement for putting message, main carrier RSRP, RSRQ, measures main carrier RSRP, RSRQ of other adjacent cells；When the terminal for being operated in extension carrier wave occurs Radio Link Failure When, the RSRP and RSRQ of adjacent cell, carrier type and cell ID are rebuild request message and report base station by terminal by RRC.

Alternatively, also include：Base station cell extension carrier wave RSRQ, RSRP according to where the terminal obtained from terminal, are based on Extension carrier switch parameter judges whether to perform carrier switch；Cell row of the base station according to the RRC configuration message obtained from terminal RSRP, RSRQ and carrier type of the adjacent cell of cell where terminal determine the cell and carrier-class for switching the terminal into table Type.

Alternatively, mobility also includes in distributing information rationally：Adjacent cell configuration parameter, if being operated in extension carrier wave or needing Terminal to extension carrier wave to be switched measures adjacent cell RSRP and/or RSRQ and reaches adjacent cell configuration parameter, then in terminal During generation Radio Link Failure, terminal rebuilds request message by adjacent cell RSRP and/or RSRQ reporting base station by RRC.

Alternatively, extension carrier information is 1 bit identification.

By such method, when terminal is when carrier wave generation Radio Link Failure is extended, terminal can be sent to base The RRC for standing rebuilds insertion mark terminal in request and the extension carrier information of Radio Link Failure occurs in extension carrier wave, and base station can To add extension carrier information in the handover report information of the cell own base station that Radio Link Failure occurs is sent to, so as to The cell own base station that Radio Link Failure occurs determines the carrier type that Radio Link Failure occurs.

According to a further aspect of the invention, a kind of link re-establishment system, including base station and terminal are proposed, wherein, base station Including：Message reception module, the RRC that self terminal is carried out for receiving rebuilds request message, and RRC rebuilds request message includes extension There is Radio Link Failure in extension carrier wave in carrier information, extension carrier information instruction terminal；Judge module, for according to RRC Rebuild request message and judge whether Radio Link Failure occurs rebuilding cell；Handover module, in Radio Link Failure not It is occur, in the case where cell is rebuild, be sent to the handover report information of the cell own base station that Radio Link Failure occurs Middle addition extension carrier information, so that the cell own base station that Radio Link Failure occurs determines the small of Radio Link Failure Area extends carrier wave wireless link failure situation.

Alternatively, terminal is used in the state of extended frequency band is resided in, and is attempted in the case of there is Radio Link Failure When carrying out cell process of reconstruction, cell is rebuild in the gravity treatment configuration information selection in broadcast message, and is sent to cell is rebuild RRC rebuilds request message.

Alternatively, gravity treatment configuration information includes, by the unidirectional gravity treatment configuration information of extension carrier wave gravity treatment to main carrier, staying The terminal of extended frequency band is stayed in the case where there is Radio Link Failure, according to unidirectional gravity treatment configuration information, configurating terminal is stayed The extension carrier wave for staying is lowest priority and starts reselection timer timing, selected according to frequency priority in preset time range Select suitable Target cell；If find being adapted to resident Target cell, gravity treatment terminal is resident to Target cell；If terminal is pre- If failing to find in time range and being adapted to resident Target cell, then terminal selects suitable mesh by performing cell search process Mark cell is resident.

Alternatively, message capturing module is additionally operable to, in the case where base station occurs Radio Link Failure, rebuild small from terminal The own base station in area obtains handover report information；Base station also includes：Memory module, please for being rebuild according to the RRC for carrying out self terminal Seek message or from the radio link failure information for rebuilding this cell of the handover report Information Statistics of cell own base station, radio chains Road failure information includes the time that Radio Link Failure occurs, carrier type, rebuilds cell ID and failure cell ID；Judge Module, is additionally operable to include that extension carrier information determines that Radio Link loses according to RRC reconstruction request messages or handover report information Generation is lost in extension carrier wave.

Alternatively, base station also includes：Statistical module, for according to radio link failure information, being sent out in the statistics scheduled time It is raw to extend the Radio Link Failure number of times of carrier wave in the Radio Link Failure number of times of main carrier and generation；Computing module, is used for Radio Link Failure ratio of the cell in extension carrier wave is calculated, cell is occur to exist in the Radio Link Failure ratio of extension carrier wave The Radio Link Failure number of times for extending carrier wave accounts for the ratio of total frequency of failure；Reporting module, for reporting subdistrict in extension carrier wave Radio Link Failure ratio and occur time to count to network management system in the Radio Link Failure of extension carrier wave.

Alternatively, also include：Network management system, for the extension carrier wave wireless link failure ratio that basis is obtained from base station, Judge whether cell exceedes predetermined failure thresholding in the Radio Link Failure ratio of extension carrier wave；If exceeding predetermined failure thresholding, Then to occur Radio Link Failure cell own base station send schedule information, with will pass through schedule information adjustment handoff parameter or Control base station avoids for Cell Edge User being dispatched to extension carrier wave.

Alternatively, handoff parameter includes main carrier handoff parameter and extension carrier switch parameter；Wherein, main carrier switching ginseng Number is switched to the decision threshold of neighbor cell main carrier for terminal from the main carrier of this base station cell；Extending carrier switch parameter is Terminal extends the decision threshold of carrier wave or main carrier from the extension carrier switch of this base station cell to neighbor cell；Network management system is also Extension carrier switch parameter for adjusting base station by schedule information control base station.

Alternatively, network management system is additionally operable to open travelling performance optimization function, and instruction message is issued to base station；Also use base station According to indicate message open mobility optimization function, to be operated in extension carrier wave or needs be switched to extension carrier wave terminal RRC configuration message is issued, RRC configurations message includes that mobility distributes information rationally；Terminal is additionally operable to be optimized according to mobility Configuration information performs extension carrier wave measurement operation, the Reference Signal Received Quality RSRQ of cell extension carrier wave where measuring terminals and Reference Signal Received Power RSRP；When the terminal for being operated in extension carrier wave occurs Radio Link Failure, terminal is rebuild by RRC The RSRQ and RSRP of the cell that Radio Link Failure occurs are reported base station by request message.

Alternatively, the mobility information of distributing rationally includes：Extension carrier wave measurement mark, be operated in extension carrier wave or need by It is switched to the extension carrier parameter of the terminal of extension carrier wave cell according to where extension carrier wave measurement mark measurement；Report indicateing arm Know, be operated in extension carrier wave or needs be switched to extension carrier wave terminal according to report sign occur Radio Link mistake Request message report measurement results are rebuild by RRC when losing；Measurement amount is identified, and is operated in extension carrier wave or needs are switched to expansion The terminal for opening up carrier wave determines measurement RSRP and/or RSRQ values according to measurement amount mark.

Alternatively, reporting module, is additionally operable to extension the carrier wave RSRQ and RSRP to cell where network management system reporting terminal； Network management system is additionally operable in the case where judging that Radio Link Failure ratio of the cell in extension carrier wave exceedes predetermined failure thresholding, RSRQ information is compared with predetermined RSRQ thresholdings, RSRP information is compared with predetermined RSRP thresholdings；If RSRQ information is less than Predetermined RSRQ thresholdings, and RSRP information be higher than predetermined RSRP thresholdings, then network management system by schedule information control base station avoid by Cell Edge User is dispatched to extension carrier wave；If RSRQ information is higher than predetermined RSRQ thresholdings, and RSRP information is less than predetermined RSRP Thresholding, then network management system is by schedule information control base station adjustment extension carrier switch parameter.

Alternatively, also include being applicable the cell row for extending carrier wave in the adjacent cell of cell where terminal in RRC configurations message Table；Terminal is additionally operable to extension carrier wave RSRP, RSRQ of adjacent cell in the cell list for measure RRC configuration message, main carrier RSRP, RSRQ, measures main carrier RSRP, RSRQ of other adjacent cells；When the terminal for being operated in extension carrier wave occurs Radio Link Failure When, the RSRP and RSRQ of adjacent cell, carrier type and cell ID are rebuild request message and report base station by terminal by RRC.

Alternatively, base station also includes：Extension carrier switching module, cell expands where the terminal obtained from terminal for basis Exhibition carrier wave RSRQ, RSRP, judge whether to perform carrier switch based on extension carrier switch parameter；Base station is according to obtaining from terminal RSRP, RSRQ and carrier type of the adjacent cell of cell where terminal are determined terminal in the cell list of RRC configuration message The cell and carrier type being switched to.

Alternatively, also include in RRC configuration information：Adjacent cell configuration parameter, if being operated in extension carrier wave or needing to be cut The terminal for changing to extension carrier wave measures adjacent cell RSRP and/or RSRQ and reaches adjacent cell configuration parameter, then nothing occurs in terminal When wired link fails, terminal rebuilds request message by adjacent cell RSRP and/or RSRQ reporting base station by RRC.

Alternatively, extension carrier information is 1 bit identification.

In such system, terminal is inserted mark terminal and is being expanded in can rebuilding request message the RRC of base station is sent to There is the extension carrier information of Radio Link Failure in exhibition carrier wave, base station can be sent to the cell institute of generation Radio Link Failure Belong to addition extension carrier information in the handover report information of base station, so that the cell own base station that Radio Link Failure occurs determines There is the carrier type of Radio Link Failure.

Brief description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：

Fig. 1 is the principle schematic of flexible bandwidth.

Fig. 2 is the frequency partition schematic diagram of flexible bandwidth.

Fig. 3 is the flow chart of one embodiment of link re-establishment method of the invention.

Fig. 4 is the flow chart of another embodiment of link re-establishment method of the invention.

Fig. 5 is that the cell own base station of generation Radio Link Failure in link re-establishment method of the invention carries out RRC reconstructions The flow chart of request message or one embodiment of handover report information processing.

Fig. 6 is that the cell own base station of generation Radio Link Failure in link re-establishment method of the invention carries out RRC reconstructions The flow chart of request message or another embodiment of handover report information processing.

Fig. 7 be link re-establishment method of the invention in network management system to extension carrier wave wireless link failure ratio enter row information The flow chart of one embodiment for the treatment of.

Fig. 8 be link re-establishment method of the invention in network management system to extension carrier wave wireless link failure ratio enter row information The flow chart of another embodiment for the treatment of.

Fig. 9 is one embodiment that base station is extended carrier switch parameter adjustment in link re-establishment method of the invention Flow chart.

Figure 10 is the schematic diagram of the one embodiment in link re-establishment system of the invention.

Figure 11 is the schematic diagram of another embodiment of the base station in link re-establishment system of the invention.

Figure 12 is the schematic diagram of another embodiment of the base station in link re-establishment system of the invention.

Figure 13 is the schematic diagram of the further embodiment of link re-establishment system of the invention.

Specific embodiment

Below by drawings and Examples, technical scheme is described in further detail.

The flow chart of one embodiment of link re-establishment method of the present invention is as shown in Figure 3.

In step 301, when terminal occurs Radio Link Failure, when being reconstructed into a cell, RRC weights can be sent to base station Build request message.Base station receives the RRC reconstruction request messages for carrying out self terminal.If terminal occurs Radio Link in extension carrier wave losing Lose, then RRC rebuilds can include extension carrier information in request message, mark terminal occurs Radio Link Failure in extension carrier wave. In one embodiment, extension carrier information is 1 bit identification.

In step 302, base station judges whether terminal is to rebuild cell generation radio chains according to RRC reconstructions request message Road fails.RRC rebuilds request message includes failure cell ID, and base station can determine that Radio Link Failure is sent out according to the mark Raw cell.If Radio Link Failure occurs rebuilding cell, step 303 is performed；If Radio Link Failure not occurs Cell is rebuild, then performs step 304.

In step 303, base station determination there occurs Radio Link Failure in the extension carrier wave for rebuilding cell, according to RRC weights The extension carrier information built in request message determines to rebuild the extension carrier wave wireless link failure situation of cell.

In step 304, base station is being sent to the handover report information of the cell own base station that Radio Link Failure occurs Middle addition extension carrier information, so that the cell own base station that Radio Link Failure occurs determines the small of Radio Link Failure Area extends carrier wave wireless link failure situation.

By such method, when terminal is when carrier wave generation Radio Link Failure is extended, terminal can be sent to base The RRC for standing rebuilds in request message the extension carrier information for inserting mark terminal in extension carrier wave generation Radio Link Failure, base Standing can add extension carrier information in the handover report information of the cell own base station that Radio Link Failure occurs is sent to, The carrier type of generation Radio Link Failure is determined so as to the cell own base station that Radio Link Failure occurs.

The flow chart as shown in Figure 2 of another embodiment of link re-establishment method of the invention

In step 401, there is Radio Link Failure in the terminal for residing in extended frequency band.Terminal is attempted carrying out cell weight Build.In one embodiment, cell is rebuild in gravity treatment configuration information selection of the terminal in broadcast message, in gravity treatment configuration information Including the unidirectional gravity treatment configuration information by extension carrier wave gravity treatment to main carrier, there are radio chains in the terminal for residing in extended frequency band In the case of the failure of road, according to unidirectional gravity treatment configuration information, the resident extension carrier wave of configurating terminal is for lowest priority and starts Reselection timer timing, according to the Target cell that frequency priority selection is suitable in preset time range；If find to be adapted to stay The Target cell for staying, then the gravity treatment terminal is resident to the Target cell；If terminal fails to find suitable in preset time range Resident Target cell, then terminal is resident by the Target cell for performing cell search process to select and being adapted to.

In step 402, terminal sends RRC and rebuilds request message to the cell own base station for rebuilding selection.RRC rebuilds please Seeking message includes extending carrier information, and mark terminal occurs Radio Link Failure in extension carrier wave.

In step 403, base station judges whether terminal is to rebuild cell generation radio chains according to RRC reconstructions request message Road fails.If Radio Link Failure occurs rebuilding cell, step 404 is performed；If Radio Link Failure not occurs in weight Cell is built, then performs step 405.

In step 404, base station determination there occurs Radio Link Failure in the extension carrier wave for rebuilding cell, according to RRC weights The extension carrier information built in request message determines to rebuild the extension carrier wave wireless link failure situation of cell.

In step 405, base station is being sent to the handover report information of the cell own base station that Radio Link Failure occurs Middle addition extension carrier information, so that the cell own base station that Radio Link Failure occurs determines the small of Radio Link Failure Area extends carrier wave wireless link failure situation.

By such method, terminal can be adapted to after it there is Radio Link Failure according to the selection of gravity treatment configuration information Cell be resident.Terminal is inserted mark terminal and is occurred in extension carrier wave in can rebuilding request message the RRC of base station is sent to The extension carrier information of Radio Link Failure, base station can be sent to cutting for the cell own base station of generation Radio Link Failure Change in report information and add extension carrier information, so that the cell own base station that Radio Link Failure occurs determines radio chains The carrier type of road failure.

In link re-establishment method of the invention occur Radio Link Failure cell own base station carry out RRC rebuild request disappear The flow chart of breath or one embodiment of handover report information processing is as shown in Figure 5.

In step 501, there is the cell own base station statistics radio link failure information of Radio Link Failure.If occurring It is same cell that the cell of Radio Link Failure rebuilds cell with terminal, then base station rebuilds request and disappears according to the RRC for carrying out self terminal Breath, obtains and counts radio link failure information；If it is not same that the cell that Radio Link Failure occurs and terminal rebuild cell , then there is the cell own base station of Radio Link Failure according to the handover report information obtained from reconstruction cell own base station in cell Obtain and count radio link failure information.Radio link failure information includes type, carrier-class that Radio Link Failure occurs Type, reconstruction cell ID and failure cell ID.

In step 502, whether base station rebuilds in request message or handover report information include extension carrier wave letter according to RRC Breath judge Radio Link Failure generation carrier type.If including extension carrier information, Radio Link Failure occurs expanding Exhibition carrier wave；If not including extension carrier information, Radio Link Failure occurs in main carrier.

By such method, the cell own base station that Radio Link Failure occurs can count generation Radio Link Failure Cell in the radio link failure information that occurs, and the carrier type of failure is judged, consequently facilitating base station is according to Radio Link Failure information is adjusted.

In one embodiment, there is Radio Link Failure in the extension carrier wave such as terminal in cell PCI1, and in same cell PCI1 realizes link re-establishment, then terminal sends RRC and rebuilds request message to PCI1 own base stations, and RRC is rebuild in request message The extension carrier information of Radio Link Failure is there occurs in extension carrier wave including instruction terminal.PCI1 rebuilds request and disappears according to RRC The cell ID that fails in breath determines that terminal occurs Radio Link Failure in this cell, and determines that terminal exists according to extension carrier information There is Radio Link Failure in extension carrier wave, so as to count radio link failure information.

If terminal occurs Radio Link Failure in the extension carrier wave of cell PCI1, link re-establishment is realized in cell PCI2, Then terminal sends RRC and rebuilds request message to PCI2 own base stations, and RRC rebuilds request message includes that instruction terminal is carried in extension Ripple there occurs the extension carrier information of Radio Link Failure.PCI2 own base stations rebuild the cell that fails in request message according to RRC Mark determines that the cell that Radio Link Failure occurs is PCI1, then send handover report information to PCI2 own base stations, and cutting Change in report information and add extension carrier information.Extension carrier informations of the PCI1 in handover report information determines that terminal is expanding There is Radio Link Failure in exhibition carrier wave, so as to count radio link failure information.

By such method, the cell own base station that Radio Link Failure occurs can determine generation Radio Link Failure Carrier type so that for be targetedly adjusted, reduce extension carrier wave Radio Link Failure probability provide data Basis.

In link re-establishment method of the invention occur Radio Link Failure cell own base station carry out RRC rebuild request disappear The flow chart of breath or another embodiment of handover report information processing is as shown in Figure 6.

In step 601, there is the radio link failure information of the cell own base station according to statistics of Radio Link Failure, Statistics occurs extending the Radio Link Failure of carrier wave in the Radio Link Failure number of times of main carrier and generation in the given time Number of times.

In step 602, the cell own base station that Radio Link Failure occurs calculates radio chains of the cell in extension carrier wave Road failure ratio.Cell extension carrier wave Radio Link Failure ratio=occur in the scheduled time extension carrier wave radio chains The road frequency of failure/(occurring extending the Radio Link Failure number of times of the Radio Link Failure number of times+generation in main carrier of carrier wave).

In step 603, there is in the Radio Link Failure ratio of extension carrier wave and in the scheduled time cell in base station The Radio Link Failure number of times for extending carrier wave is reported to network management system.

By such method, base station can calculate the Radio Link Failure situation occurred in extension carrier wave, main carrier, with And the Radio Link Failure ratio in extension carrier wave occurs and network management system is reported, it is easy to network management system to be analyzed judgement, And carry out corresponding adjustment.

Network management system carries out information processing to extension carrier wave wireless link failure ratio in link re-establishment method of the invention One embodiment flow chart it is as shown in Figure 7.

In step 701, network management system obtains the extension carrier wave wireless link failure ratio of cell from base station.

In a step 702, judge whether cell exceedes predetermined threshold in the Radio Link Failure ratio of extension carrier wave.If super Predetermined threshold is crossed, then performs step 703；If not less than predetermined threshold, not processing.

In step 703, network management system sends schedule information to Radio Link Failure cell own base station, and control base station is entered Row adjustment, to reduce service fail ratio.

By such method, network management system can obtain Radio Link Failure ratio from base station, and then cell is being expanded The Radio Link Failure situation for opening up carrier wave is judged, when thresholding is exceeded in the Radio Link Failure situation for extending carrier wave, is adjusted Degree base station is adjusted, to reduce the service fail rate in extension carrier wave.

In one embodiment, network management system exceedes the same of thresholding in the Radio Link Failure ratio for judging extension carrier wave When, also to judge to extend the Radio Link Failure number of times of carrier wave whether beyond number of times thresholding.Enter again when both of which exceeds thresholding Row adjustment, so as to avoid extending carrier wave to have carried out mistuning in the case that Radio Link Failure ratio is high but number of times is few whole, reduce Adjustment number of times, reduces network regulation burden.

In one embodiment, the handoff parameter of base station includes two kinds：Main carrier handoff parameter and extension carrier switch ginseng Number.Base station is configured with extension carrier switch parameter independently of main carrier handoff parameter.When terminal from the base station cell for being connected When main carrier is switched to the main carrier of neighbor cell, using main carrier handoff parameter as decision threshold；When terminal from place cell Extension carrier switch to neighbor cell extension carrier wave or main carrier when, to extend carrier switch parameter as decision threshold. Main carrier handoff parameter with difference, and can distinguish management and control with the specific data of extension carrier switch parameter.

By such method, base station has different handoff parameters for main carrier and extension carrier wave, can make respectively Be terminal from main carrier, extension carrier switch to neighbor cell decision threshold, enable handoff parameter correspond with main carrier, The service condition of carrier wave is extended, makes handoff parameter more targeted, improve Consumer's Experience.In addition, when network management system needs adjustment During the extension carrier wave of base station, the handoff parameter of extension carrier wave can be only adjusted, main carrier handoff parameter not influenceed, so that being directed to The adjustment for extending carrier wave is more targeted, and the terminal for being connected to main carrier is not impacted.

In one embodiment, network management system can open mobility according to the configuration of the demand of operator or technical staff Optimization function, instruction message is issued to base station.Indicate to include indicating base station to open the mark that mobility optimizes function in message Know, and to supporting the base station of flexible bandwidth ability for the optimization information of extension carrier wave.Optimization information can specifically include referring to Show that terminal carries out flexible bandwidth measurement and the mark for reporting, instruction terminal needs to report RSRP and/or RSRQ, and base station needs The cycle reported to network management system.Indicate that in message all kinds of threshold values, including handoff parameter thresholding, timer door can also be included Limit etc..

By such method, network management system can open the mobility optimization function of base station, and issue optimization to base station Information and all kinds of threshold values, enhance the controllability to base station, terminal.

In one embodiment, base station is according to indicating message to open mobility optimization function, and to being operated in extension carrier wave Or need the terminal for being switched to extension carrier wave to issue RRC configuration message.RRC configurations message includes that mobility distributes letter rationally Breath.

In one embodiment, the mobility information of distributing rationally of RRC configurations message includes multiple parameters, wherein, root According to extension carrier wave measurement mark, it is operated in extension carrier wave or needs whether the terminal judges for being switched to extension carrier wave measure institute In the extension carrier parameter of cell, e.g., when extension carrier wave measurement is designated 1, the extension carrier wave of cell is joined where terminal measurement Number, otherwise, does not perform extension carrier parameter measurement operation.According to sign is reported, it is operated in extension carrier wave or needs is cut The terminal for changing to extension carrier wave rebuilds request message report measurement results when there is Radio Link Failure by RRC.Measurement amount Mark can with instruction terminal measure RSRP or RSRQ values, or both measure.

By such method, base station can configure the operation that message arrangement terminal is performed by RRC, make terminal in extension The measurement of carrier wave has more controllability.

Be operated in extension carrier wave or needs be switched to the terminal of extension carrier wave can be with according to the mobility information of distributing rationally RSRP, RSRQ information of cell where measurement；When terminal occurs Radio Link Failure, RSRP, RSRQ of place cell are believed Cease and the own base station that request message is sent to reconstruction cell is rebuild by RRC.The own base station for rebuilding cell can be by cell RSRP, RSRQ information reporting to network management system, so that network management system accurately analyzes generation Radio Link according to the information for obtaining The extension Carrier State of the cell of failure, so as to more targetedly be adjusted.

Network management system carries out information processing to extension carrier wave wireless link failure ratio in link re-establishment method of the invention Another embodiment flow chart it is as shown in Figure 8.

In step 801, network management system obtains the extension carrier wave wireless link failure ratio of cell, and extension from base station RSRQ, RSRP information of carrier wave.

In step 802, network management system judges cell makes a reservation for whether the Radio Link Failure ratio of extension carrier wave exceedes Thresholding.If exceeding predetermined threshold, step 803 is performed；If not less than predetermined threshold, performing step 807.

In step 803, respectively be compared RSRQ, RSRP information with predetermined RSRQ, RSRP thresholding by network management system.If RSRQ information is less than predetermined RSRQ thresholdings, but RSRP information is higher than predetermined RSRP thresholdings, then perform step 804；Otherwise, step is performed Rapid 805.

In step 804, network management system sends schedule information to base station, and control base station avoids dispatching Cell Edge User To extension carrier wave.

In step 805, respectively be compared RSRQ, RSRP information with predetermined RSRQ, RSRP thresholding by network management system.If RSRQ information is higher than predetermined RSRQ thresholdings, but RSRP information is less than predetermined RSRP thresholdings, then perform step 806；Otherwise, step is performed Rapid 807.

In step 806, network management system adjusts handoff parameter by schedule information control base station, to reduce in extension carrier wave Radio Link Failure situation occur.

In step 807, network management system ignores the Radio Link Failure ratio for this time reporting, the behaviour for not carrying out regulation base station Make.

By such method, network management system, being capable of basis after the Radio Link Failure ratio for obtaining extension carrier wave RSRQ, RSRP situation judge which kind of regulation and control is carried out to base station, so as to targetedly be adjusted, preferably reduce the expansion of base station Exhibition Bearer traffic probability of failure.

Base station is extended the flow of one embodiment of carrier switch parameter adjustment in link re-establishment method of the invention Figure is as shown in Figure 9.

In step 901, base station issues extension carrier wave measurement configuration message to terminal, in extension carrier wave measurement configuration message Object, cell list, report manner, measurement mark and/or the event argument of measurement are needed including terminal.

In step 902, terminal performs the measurement operation to extending carrier wave, and extension carrier wave measurement report is reported into base Stand.

In step 903, base station judges whether to perform according to extension carrier wave measurement report based on extension carrier switch parameter Carrier switch, and judge terminal extension carrier wave from place cell extension carrier switch to neighbor cell or neighbor cell Main carrier.

By such method, base station can be to extend carrier switch parameter as judgement foundation, the expansion to terminal feedback Exhibition carrier wave measurement report is analyzed, and judges whether terminal from the extension carrier switch of place cell to the extension of neighbor cell Carrier wave or main carrier, realize the extension carrier switch independently of main carrier switching, make extension Bearer traffic more perfect.

In one embodiment, base station also includes the adjacent small of cell where terminal in being sent to the RRC of terminal configuration message The cell list of extension carrier wave is applicable in area.Terminal can measure the adjacent cell being included in the cell list of RRC configuration message Extension carrier wave RSRP, RSRQ, main carrier RSRP, RSRQ, can also measure and not be included in the cell list of RRC configuration message Other adjacent cells main carrier RSRP, RSRQ.When the terminal for being operated in extension carrier wave occurs Radio Link Failure, terminal will The RSRP and RSRQ and corresponding carrier type and cell ID of adjacent cell rebuild request message and report base station by RRC.

By such method, base station can obtain occur Radio Link Failure cell adjacent cell RSRP and RSRQ, carrier type, cell ID such that it is able to extend carrier switch parameter as handoff threshold, by comparing adjacent cell RSRP, RSRQ be suitable switching cell, the suitable carrier type of terminal selection for being operated in extension carrier wave.

In one embodiment, mobility also includes adjacent cell configuration parameter in distributing information rationally.If being operated in extension When the terminal that carrier wave or needs are switched to extension carrier wave measures adjacent cell RSRP, RSRQ and reaches the adjacent cell configuration parameter, Illustrate the cell signal quality preferably, the alternative cell that can switch as terminal, then when terminal occurs Radio Link Failure, Terminal rebuilds request message by adjacent cell RSRP and/or RSRQ reporting base station by RRC；If adjacent cell RSRP, RSRQ is not up to The configuration parameter of the adjacent cell, then need not be reported to base station.

By such method, can configurating terminal carry out the screening operation of part adjacent cell, carrier wave, reduce base station Burden, while also reducing the network burden that terminal is interacted with base station.

The schematic diagram of one embodiment of link re-establishment system of the invention is as shown in Figure 10.Wherein, 1001 is terminal, 1002 is base station.Base station 1002 includes message reception module 1012, can receive the RRC reconstruction request messages for carrying out self terminal. When terminal occurs Radio Link Failure, when being switched to a base station, RRC can be sent to base station and rebuild request message.RRC rebuilds please Seeking message includes extending carrier information, and mark terminal occurs Radio Link Failure in extension carrier wave.In one embodiment, expand Exhibition carrier information is 1 bit identification.Judge module 1022, can rebuild request message and judge whether terminal is in weight according to RRC Build cell and Radio Link Failure occurs.Handover module 1032, not can rebuild cell generation Radio Link Failure in terminal In the case of, handover report information is sent to the cell that Radio Link Failure occurs, and extension is added in handover report information Carrier information, so as to the cell own base station that Radio Link Failure occurs determine the cell extension carrier wave of the Radio Link Failure without Wired link failure scenarios.

In such system, terminal is inserted mark terminal and is carried in extension in can rebuilding request the RRC of base station is sent to There is the extension carrier information of Radio Link Failure in ripple, base station can be sent to the affiliated base of cell of generation Radio Link Failure Extension carrier information is added in the handover report information stood, so that the cell own base station that Radio Link Failure occurs determines occur The carrier type of Radio Link Failure.

In one embodiment, there is Radio Link Failure in the terminal for residing in extended frequency band.Terminal is attempted carrying out cell Rebuild.In one embodiment, cell, gravity treatment configuration information are rebuild in gravity treatment configuration information selection of the terminal in broadcast message Include that the terminal that extended frequency band is resided in by the unidirectional gravity treatment configuration information of extension carrier wave gravity treatment to main carrier is occurring wirelessly In the case of link failure, according to unidirectional gravity treatment configuration information, the resident extension carrier wave of configurating terminal is for lowest priority and opens Dynamic reselection timer timing, according to the Target cell that frequency priority selection is suitable in preset time range；If finding suitable Resident Target cell, then the gravity treatment terminal is resident to the Target cell；If terminal fails to find suitable in preset time range Resident Target cell is closed, then terminal selects suitable Target cell to be resident by performing cell search process.Terminal is to selection Cell own base station send RRC rebuild request message.RRC rebuilds request message to be included extending carrier information, identifies terminal There is Radio Link Failure in extension carrier wave.

In such a system, terminal can be adapted to after it there is Radio Link Failure according to the selection of gravity treatment configuration information Cell be resident.It is wireless in extension carrier wave generation that terminal can insert mark terminal in the RRC of base station reconstruction requests are sent to The extension carrier information of link failure, base station can be sent to the switching report of the cell own base station that Radio Link Failure occurs Extension carrier information is added in announcement information, so that the cell own base station that Radio Link Failure occurs determines that Radio Link occurs to be lost The carrier type for losing.

The schematic diagram of another embodiment of the base station in link re-establishment system of the invention is as shown in figure 11.Wherein, disappear Breath receiver module 1101, judge module 1102 and the 26S Proteasome Structure and Function of handover module 1103 are similar to the embodiment of Figure 10.Disappear Breath receiver module 1101 is in addition to receiving the RRC for carrying out self terminal and rebuilding request, additionally it is possible to obtain the handover report from other base stations Information.After terminal occurs Radio Link Failure in the cell for belonging to this base station, if the reconstruction cell of terminal does not belong to this Base station, the then home base station that this base station can rebuild cell from terminal obtains handover report information.Base station also includes memory module 1104.If it is same cell that cell and terminal that Radio Link Failure occurs rebuild cell, memory module 1104 is according to coming from The RRC of terminal rebuilds request message statistics radio link failure information；If the cell that Radio Link Failure occurs and terminal are rebuild Cell is not same cell, then memory module 1104 according to from rebuild handover report Information Statistics that cell own base station obtains without Wired link failure information.Radio link failure information includes the type that Radio Link Failure occurs, carrier type, rebuilds cell mark Know and failure cell ID.

In such system, the cell own base station that Radio Link Failure occurs can count the generation Radio Link Failure Cell in the radio link failure information that occurs, and the carrier type of failure is judged, so that for follow-up optimization processing is provided Necessary information, is easy to base station to be adjusted according to radio link failure information.

The schematic diagram of another embodiment of the base station in link re-establishment system of the invention is as shown in figure 12.Wherein, disappear The 26S Proteasome Structure and Function and the reality of Figure 11 of breath receiver module 1201, judge module 1202, handover module 1203 and memory module 1204 Apply similar in example.Base station also includes statistical module 1205, can be according to the radio link failure information of statistics, and statistics is in pre- timing It is interior to occur extending the Radio Link Failure number of times of carrier wave in the Radio Link Failure number of times of main carrier and generation.Computing module 1206 can calculate Radio Link Failure ratio of the cell in extension carrier wave.Radio Link Failure ratio of the cell in extension carrier wave There is Radio Link Failure number of times/(Radio Link Failure of the generation in extension carrier wave in extension carrier wave in the=scheduled time Radio Link Failure number of times of the number+generation in main carrier).Cell can extended the Radio Link of carrier wave by reporting module 1207 Occur to be reported to network management system in the Radio Link Failure number of times of extension carrier wave in failure ratio and the scheduled time.

Such base station can calculate the Radio Link Failure situation occurred in extension carrier wave, main carrier, and occur The Radio Link Failure ratio for extending carrier wave simultaneously reports network management system, is easy to network management system to be analyzed judgement, and carry out it is right The adjustment answered.

The schematic diagram of the further embodiment of link re-establishment system of the invention is as shown in figure 13.Wherein, multiple base stations are Multiple Terminal for service, base station is connected with network management system, it is possible to will occur in extension carrier wave Radio Link Failure ratio, Number of times reports network management system.After the extension carrier wave wireless link failure ratio that network management system obtains cell from base station, judge small Whether area exceedes predetermined threshold in the Radio Link Failure ratio of extension carrier wave.If exceeding predetermined threshold, lost to Radio Link Lose cell own base station and send schedule information, control base station is adjusted, to reduce the service fail probability in extension carrier wave.

In such link re-establishment system, network management system can obtain Radio Link Failure ratio from base station, and then to small Area is judged in the Radio Link Failure situation of extension carrier wave, when the Radio Link Failure situation in extension carrier wave exceedes thresholding When, scheduling base station is adjusted, to reduce service fail rate.

In one embodiment, network management system exceedes the same of thresholding in the Radio Link Failure ratio for judging extension carrier wave When, also to judge to extend the Radio Link Failure number of times of carrier wave whether beyond number of times thresholding.Enter again when both of which exceeds thresholding Row adjustment, so as to avoid extending carrier wave to have carried out mistuning in the case that Radio Link Failure ratio is high but number of times is few whole, reduce Adjustment number of times, reduces network regulation burden.

In one embodiment, the reporting module of base station can also be by RSRQ, RSRP information reporting of cell extension carrier wave To network management system.Network management system can obtain RSRQ, RSRP information of cell extension carrier wave from base station.Judging cell in extension In the case that the Radio Link Failure ratio of carrier wave exceedes predetermined threshold, network management system by RSRQ, RSRP information respectively with it is predetermined RSRQ, RSRP thresholding are compared.If RSRQ information is less than predetermined RSRQ thresholdings, but RSRP information is higher than predetermined RSRP thresholdings, Schedule information then is sent to base station, control base station avoids for Cell Edge User being dispatched to extension carrier wave.If RSRQ information is higher than Predetermined RSRQ thresholdings, but RSRP information is less than predetermined RSRP thresholdings, then adjust handoff parameter by schedule information control base station, with The Radio Link Failure situation reduced in extension carrier wave occurs.

In such link re-establishment system, network management system, can after the Radio Link Failure ratio for obtaining extension carrier wave Judge which kind of regulation and control is carried out to base station according to RSRQ, RSRP situation, so as to targetedly be adjusted, preferably reduce base station Extension Bearer traffic probability of failure.

In one embodiment, the handoff parameter of base station includes two kinds：Main carrier handoff parameter and extension carrier switch ginseng Number.Base station is configured with extension carrier switch parameter independently of main carrier handoff parameter.When terminal from the main load of place base station cell When ripple is switched to the main carrier of neighbor cell, using main carrier handoff parameter as decision threshold；When terminal from the expansion of place cell Exhibition carrier switch to neighbor cell extension carrier wave or main carrier when, to extend carrier switch parameter as decision threshold.Main load Ripple handoff parameter with difference, and can distinguish management and control with the specific data of extension carrier switch parameter.

Such base station has different handoff parameters for main carrier and extension carrier wave, can be respectively as terminal from master The decision threshold of carrier wave, extension carrier switch to neighbor cell, enables handoff parameter to correspond with main carrier, extend carrier wave Service condition, makes handoff parameter more targeted, improves Consumer's Experience.In addition, when network management system needs the extension of scheduling base station During carrier wave, the handoff parameter of extension carrier wave can be only adjusted, main carrier handoff parameter is not influenceed, so that for extension carrier wave Adjustment more targetedly, and is not impacted to the terminal for being connected to main carrier.

In one embodiment, base station also includes extension carrier switching module, can issue extension carrier wave to terminal and measure Configuration message, extension carrier wave measurement configuration message includes object, cell list, report manner, the measurement of the measurement of terminal needs Mark and/or event argument；Extension carrier wave measurement report is obtained from terminal to report；According to extension carrier wave measurement report, based on expansion Exhibition carrier switch parameter judges whether to perform carrier switch, and judges terminal from place cell extension carrier switch to adjacent The extension carrier wave or the main carrier of neighbor cell of cell.

Such base station can be to extend carrier switch parameter as judgement foundation, the extension carrier wave measurement to terminal feedback Report is analyzed, and judges whether terminal from the extension carrier switch of place cell to the extension carrier wave or main load of neighbor cell Ripple, realizes the extension carrier switch independently of main carrier switching, makes extension Bearer traffic more perfect.

Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations；To the greatest extent Pipe has been described in detail with reference to preferred embodiment to the present invention, and those of ordinary skill in the art should be understood：Still Specific embodiment of the invention can be modified or equivalent is carried out to some technical characteristics；Without deviating from this hair The spirit of bright technical scheme, it all should cover in the middle of claimed technical scheme scope of the invention.

Claims (28)

1. a kind of link re-establishment method, it is characterised in that including：

Base station receives the radio resource control RRC reconstruction request message for carrying out self terminal, wherein, the RRC is rebuild in request message Including extension carrier information, the extension carrier information indicates the terminal that Radio Link Failure occurs in extension carrier wave；

The base station rebuilds request message and judges whether the Radio Link Failure occurs rebuilding cell according to the RRC；

If the Radio Link Failure is occurred in the reconstruction cell, the base station is being sent to generation Radio Link Failure Cell own base station handover report information in add extension carrier information, so as to it is described generation Radio Link Failure cell Own base station determines the cell extension carrier wave wireless link failure situation of the generation Radio Link Failure；

If the Radio Link Failure occurs in the reconstruction cell, the base station is rebuild in request message according to the RRC Extension carrier information determine it is described reconstruction cell extension carrier wave wireless link failure situation.

2. method according to claim 1, it is characterised in that also include：

The terminal for residing in extended frequency band is attempted carrying out cell process of reconstruction, the end in the case where there is Radio Link Failure Hold the gravity treatment configuration information selection in broadcast message to rebuild cell, and request message is rebuild to cell transmission RRC is rebuild.

3. method according to claim 2, it is characterised in that the gravity treatment configuration information is included by extension carrier wave gravity treatment To the unidirectional gravity treatment configuration information of main carrier, the terminal of extended frequency band is resided in the case where there is Radio Link Failure, root According to the unidirectional gravity treatment configuration information, the resident extension carrier wave of configurating terminal is for lowest priority and starts reselection timer meter When, according to the Target cell that frequency priority selection is suitable in preset time range；

If find being adapted to resident Target cell, terminal described in gravity treatment is resident to the Target cell；

If the terminal fails to find in preset time range is adapted to resident Target cell, the terminal is small by performing The suitable Target cell of area searching process choosing is resident.

4. method according to claim 1 and 2, it is characterised in that also include：

The cell own base station that Radio Link Failure occurs rebuilds request message according to the RRC for carrying out self terminal, or comes There is the Radio Link Failure of the cell of Radio Link Failure described in handover report Information Statistics from reconstruction cell own base station Information, the radio link failure information includes the time that Radio Link Failure occurs, carrier type, rebuilds cell ID and mistake Lose cell ID；

If the RRC rebuilds request message or handover report information to include extending carrier information, it is determined that the Radio Link Failure occurs in extension carrier wave.

5. method according to claim 4, it is characterised in that the cell own base station root of the generation Radio Link Failure According to the radio link failure information, occur expanding in the Radio Link Failure number of times of main carrier and generation in the statistics scheduled time Open up the Radio Link Failure number of times of carrier wave；

The cell own base station that Radio Link Failure occurs calculates Radio Link Failure ratio of the cell in extension carrier wave, institute It is that the generation is accounted for always in the Radio Link Failure number of times of extension carrier wave that cell is stated in the Radio Link Failure ratio of extension carrier wave The ratio of the frequency of failure；

The cell own base station that Radio Link Failure occurs reports the cell in the Radio Link Failure ratio of extension carrier wave Example and generation count to network management system in the Radio Link Failure of extension carrier wave.

6. method according to claim 5, it is characterised in that also include：

The network management system judges cell in extension carrier wave according to the extension carrier wave wireless link failure ratio obtained from base station Whether Radio Link Failure ratio exceedes predetermined failure thresholding；

If exceeding the predetermined failure thresholding, scheduling letter is sent to the cell own base station of the generation Radio Link Failure Breath, avoids for Cell Edge User being dispatched to extension load will pass through the schedule information adjustment handoff parameter or control base station Ripple.

7. method according to claim 6, it is characterised in that the handoff parameter includes main carrier handoff parameter and extension Carrier switch parameter；Wherein, the main carrier handoff parameter is switched to neighbor cell for terminal from the main carrier of this base station cell The decision threshold of main carrier；The extension carrier switch parameter is terminal from the extension carrier switch of this base station cell to adjacent small Area extends the decision threshold of carrier wave or main carrier；

The network management system adjusts the extension carrier switch parameter of the base station by the schedule information control base station.

8. method according to claim 6, it is characterised in that also include：

The network management system opens travelling performance optimization function, and instruction message is issued to the base station；

The base station according to it is described instruction message open mobility optimization function, to be operated in extension carrier wave or needs be switched to The terminal for extending carrier wave issues RRC configuration message, and the RRC configurations message includes that mobility distributes information rationally；

The terminal is distributed information rationally and performs extension carrier wave measurement operation according to the mobility, and cell expands where measuring terminals Open up the Reference Signal Received Quality RSRQ and Reference Signal Received Power RSRP of carrier wave；

When the terminal for being operated in extension carrier wave occurs Radio Link Failure, terminal rebuilds request message by RRC will occur nothing The RSRQ and RSRP of the cell of wired link failure report base station.

9. method according to claim 8, it is characterised in that the mobility information of distributing rationally includes：

Extension carrier wave measurement is indicated, and is operated in extension carrier wave or is needed the terminal for being switched to extension carrier wave to be carried according to the extension Wave measurement indicates the extension carrier parameter of cell where measurement；

Measurement reports instruction, is operated in extension carrier wave or needs the terminal for being switched to extension carrier wave to report finger according to the measurement Show and request message report measurement results are rebuild by RRC when there is Radio Link Failure；

Measurement amount, the measurement amount includes RSRP and/or RSRQ.

10. method according to claim 9, it is characterised in that also include：

Extension carrier wave from the base station to cell where network management system reporting terminal RSRQ and RSRP；

If the network management system judges that cell exceedes predetermined failure thresholding in the Radio Link Failure ratio of extension carrier wave,

The network management system compares RSRQ information with RSRQ thresholdings, and RSRP information is compared with predetermined RSRP thresholdings；

If the RSRQ information is less than predetermined RSRQ thresholdings, and RSRP information is higher than predetermined RSRP thresholdings, then the network management system Avoid for Cell Edge User being dispatched to extension carrier wave by the schedule information control base station；

If the RSRQ information is higher than predetermined RSRQ thresholdings, and RSRP information is less than predetermined RSRP thresholdings, then the network management system Extension carrier switch parameter is adjusted by the schedule information control base station.

11. method according to claim 9 or 10, it is characterised in that also include supporting to extend in the RRC configurations message The adjacent cell list of carrier wave measurement；

The extension of adjacent cell is carried in the adjacent cell list that the support extension carrier wave that the terminal measures the RRC configurations message is measured Ripple RSRP, RSRQ, main carrier RSRP, RSRQ measure main carrier RSRP, RSRQ of other adjacent cells；

When there is Radio Link Failure in the terminal for being operated in extension carrier wave, the terminal by the RSRP of the adjacent cell and RSRQ, carrier type and cell ID rebuild request message and report base station by RRC.

12. methods according to claim 11, it is characterised in that also include：

The base station cell extension carrier wave RSRQ, RSRP according to where the terminal obtained from terminal, are cut based on extension carrier wave Parameter is changed to judge whether to perform carrier switch；The base station configures the cell list of message according to the RRC obtained from terminal Described in cell where terminal adjacent cell RSRP, RSRQ and carrier type determine the cell and the carrier wave that switch the terminal into Type.

13. methods according to claim 10, it is characterised in that the mobility also includes in distributing information rationally：

Adjacent cell configuration parameter, if being operated in extension carrier wave or needing the terminal for being switched to extension carrier wave to measure adjacent cell RSRP and/or RSRQ reach the adjacent cell configuration parameter, then when terminal occurs Radio Link Failure, terminal is by RRC weights Request message is built by the adjacent cell RSRP and/or RSRQ reporting base stations.

14. methods according to claim 9, it is characterised in that the extension carrier information is 1 bit identification.

A kind of 15. link re-establishment systems, including base station and terminal, it is characterised in that wherein, the base station includes：

Message reception module, the RRC that self terminal is carried out for receiving rebuilds request message, and the RRC rebuilds request message to be included Extension carrier information, the extension carrier information indicates the terminal that Radio Link Failure occurs in extension carrier wave；

Judge module, judges whether Radio Link Failure occurs rebuilding cell for rebuilding request message according to the RRC；

Handover module, for not being occur in the case of the reconstruction cell, be sent in the Radio Link Failure Extension carrier information is added in the handover report information of the cell own base station of raw Radio Link Failure, is occurred wirelessly so as to described The cell own base station of link failure determines the cell extension carrier wave wireless link failure situation of the generation Radio Link Failure.

16. systems according to claim 15, it is characterised in that

The terminal, in the state of extended frequency band is resided in, trial to carry out small in the case of generation Radio Link Failure During area's process of reconstruction, cell is rebuild in the gravity treatment configuration information selection in broadcast message, and sends RRC reconstructions to cell is rebuild Request message.

17. systems according to claim 16, it is characterised in that the gravity treatment configuration information is included by extension carrier wave weight The unidirectional gravity treatment configuration information of main carrier being chosen, the terminal of extended frequency band is resided in the case where there is Radio Link Failure, According to the unidirectional gravity treatment configuration information, the resident extension carrier wave of configurating terminal is for lowest priority and starts reselection timer meter When, according to the Target cell that frequency priority selection is suitable in preset time range；

If find being adapted to resident Target cell, terminal described in gravity treatment is resident to the Target cell；

If the terminal fails to find in preset time range is adapted to resident Target cell, the terminal is small by performing The suitable Target cell of area searching process choosing is resident.

18. system according to claim 15 or 16, it is characterised in that

The message capturing module is additionally operable to, in the case where base station occurs Radio Link Failure, be rebuild belonging to cell from terminal Base station obtains handover report information；

The base station also includes：

Memory module, for rebuilding request message or cutting from reconstruction cell own base station according to the RRC for carrying out self terminal The radio link failure information that report information counts this cell is changed, the radio link failure information includes that Radio Link occurs to be lost Time, carrier type, reconstruction cell ID and the failure cell ID for losing；

The judge module, is additionally operable to include extension carrier wave letter according to RRC reconstruction request messages or handover report information Breath determines that the Radio Link Failure occurs in extension carrier wave.

19. systems according to claim 18, it is characterised in that the base station also includes：

Statistical module, for according to the radio link failure information, there are the radio chains in main carrier in the statistics scheduled time The road frequency of failure and generation are extending the Radio Link Failure number of times of carrier wave；

Computing module, for calculating Radio Link Failure ratio of the cell in extension carrier wave, nothing of the cell in extension carrier wave Wired link failure ratio is the ratio for occurring and total frequency of failure being accounted in the Radio Link Failure number of times of extension carrier wave；

Reporting module, for reporting the cell in the Radio Link Failure ratio of extension carrier wave and the nothing in extension carrier wave occurring The wired link frequency of failure is to network management system.

20. systems according to claim 19, it is characterised in that also include：Network management system, obtains for basis from base station Extension carrier wave wireless link failure ratio, judge whether cell exceedes predetermined mistake in the Radio Link Failure ratio of extension carrier wave Lose thresholding；

If exceeding the predetermined failure thresholding, scheduling letter is sent to the cell own base station of the generation Radio Link Failure Breath, avoids for Cell Edge User being dispatched to extension load will pass through the schedule information adjustment handoff parameter or control base station Ripple.

21. systems according to claim 20, it is characterised in that

The handoff parameter includes main carrier handoff parameter and extension carrier switch parameter；Wherein, the main carrier handoff parameter The decision threshold of neighbor cell main carrier is switched to from the main carrier of this base station cell for terminal；The extension carrier switch parameter Extend the decision threshold of carrier wave or main carrier to neighbor cell from the extension carrier switch of this base station cell for terminal；

The network management system is additionally operable to be adjusted by the schedule information control base station extension carrier switch parameter of the base station.

22. systems according to claim 20, it is characterised in that the network management system is additionally operable to open travelling performance optimization Function, instruction message is issued to the base station；

The base station be additionally operable to according to it is described instruction message open mobility optimization function, to be operated in extend carrier wave or need by The terminal for being switched to extension carrier wave issues RRC configuration message, and the RRC configurations message includes that mobility distributes information rationally；

The terminal is additionally operable to distribute information rationally according to the mobility and perform extend carrier wave measurement operation, where measuring terminals The Reference Signal Received Quality RSRQ and Reference Signal Received Power RSRP of cell extension carrier wave；When the end for being operated in extension carrier wave End occur Radio Link Failure when, terminal by RRC rebuild request message by occur Radio Link Failure cell RSRQ with RSRP reports base station.

23. systems according to claim 22, it is characterised in that the mobility information of distributing rationally includes：

Extension carrier wave measurement mark, is operated in extension carrier wave or needs the terminal for being switched to extension carrier wave to be carried according to the extension The extension carrier parameter of cell where wave measurement mark measurement；

Sign is reported, extension carrier wave is operated in or is needed the terminal for being switched to extension carrier wave that indicateing arm is reported according to Know and request message report measurement results are rebuild by RRC when there is Radio Link Failure；

Measurement amount is identified, and is operated in extension carrier wave or is needed the terminal for being switched to extension carrier wave true according to measurement amount mark Location survey amount RSRP and/or RSRQ value.

24. systems according to claim 23, it is characterised in that

The reporting module, is additionally operable to extension the carrier wave RSRQ and RSRP to cell where network management system reporting terminal；

The network management system is additionally operable to judging Radio Link Failure ratio of the cell in extension carrier wave more than predetermined failure thresholding In the case of, RSRQ information is compared with predetermined RSRQ thresholdings, RSRP information is compared with predetermined RSRP thresholdings；

If the RSRQ information is less than predetermined RSRQ thresholdings, and RSRP information is higher than predetermined RSRP thresholdings, then the network management system Avoid for Cell Edge User being dispatched to extension carrier wave by the schedule information control base station；

If the RSRQ information is higher than predetermined RSRQ thresholdings, and RSRP information is less than predetermined RSRP thresholdings, then the network management system Extension carrier switch parameter is adjusted by the schedule information control base station.

25. system according to claim 23 or 24, it is characterised in that

Also include being applicable the cell list for extending carrier wave in the adjacent cell of cell where the terminal in the RRC configurations message；

The terminal is additionally operable to extension carrier wave RSRP, RSRQ of adjacent cell in the cell list for measure the RRC configurations message, main Carrier wave RSRP, RSRQ, measure main carrier RSRP, RSRQ of other adjacent cells；When the terminal for being operated in extension carrier wave occurs wirelessly During link failure, the RSRP and RSRQ of the adjacent cell, carrier type and cell ID are rebuild and asked by the terminal by RRC Information reporting is to base station.

26. systems according to claim 25, it is characterised in that the base station also includes：

Extension carrier switching module, cell extension carrier wave RSRQ, RSRP where the terminal obtained from terminal for basis, base Judge whether to perform carrier switch in extension carrier switch parameter；The base station disappears according to the RRC configurations obtained from terminal RSRP, RSRQ and carrier type of the adjacent cell of cell where terminal described in the cell list of breath determine to switch the terminal into Cell and carrier type.

27. systems according to claim 24, it is characterised in that also include in the RRC configuration information：

Adjacent cell configuration parameter, if being operated in extension carrier wave or needing the terminal for being switched to extension carrier wave to measure adjacent cell RSRP and/or RSRQ reach the adjacent cell configuration parameter, then when terminal occurs Radio Link Failure, terminal is by RRC weights Request message is built by the adjacent cell RSRP and/or RSRQ reporting base stations.

28. base stations according to claim 23, it is characterised in that the extension carrier information is 1 bit identification.