Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
At first introduce portable terminal sub-district switching way, can comprise: soft handover, direct-cut operation, baton handover.
Soft handover is to keep being connected with two sub-districts simultaneously at the terminal that moves forward and backward of switching; Direct-cut operation is when switching, will discharge earlier and being connected of former sub-district, and rebulid and being connected of Target cell, and baton handover is to keep with when former sub-district is connected again; Attempt being connected with Target cell; Corresponding information at the switching instant Target cell that basis has obtained to the terminal, back is linked into Target cell, and network side discharges original link simultaneously.In the TD-SCDMA system; Because soft handover needs the terminal that two cover receiver systems are arranged; And need take two cover channel resources, so generally do not adopt this kind switching mode, baton handover and direct-cut operation have higher resource utilization and are easy to the advantage that portable terminal is realized; Therefore, the present invention is primarily aimed at baton handover and direct-cut operation.
The mobile terminal skip zone switching method that the embodiment of the invention provides, its flow process is as shown in Figure 1, comprises the steps:
Step S11: the mobile terminal protocol layer receives radio network controller (Radio Network Controller, RNC) the physical channel reprovision request of definite request handed over service sub-district of when switch the target adjacent area, sending of current service cell.
The mobile terminal protocol stack is that protocol layer is when receiving the measurement control message that the RNC of current service cell sends; Obtain measurement result from the mobile terminal physical layer to the adjacent area; And the measurement report that reports the measurement result that comprises the adjacent area gives the RNC of current service cell, so that the RNC of current service cell is according to measurement report select target adjacent area and determine whether to switch to the target adjacent area.
Step S12: resolve physical channel reprovision request and be given to the mobile terminal physical layer.
Step S13: ascending time slot is closed in the control of mobile terminal physical layer.
Step S14: the mobile terminal physical layer obtains the target neighboring area signal intensity of measurement and opens ascending time slot after the change of the community configured information of portable terminal is configured to the community configured information of target adjacent area.Wherein, community configured information comprises measurement control, synchronous tracking Control, frequency and Neighboring Cell List.
Step S15: the mobile terminal physical layer is initiated the uplink synchronous configuration flow to the target neighbor base station after accomplishing the community configured information change of portable terminal.
Step S16: the RNC of notification target adjacent area after the configuration of mobile terminal physical layer accomplished.
Handling process when preferably, said method also comprises the uplink synchronous configuration failure of portable terminal and target neighbor base station.
Reason when causing the uplink synchronous configuration failure of portable terminal and target neighbor base station possibly be many-sided, is example with direct-cut operation and baton handover:
If the sub-district switch mode is the baton handover pattern; Portable terminal is initiated the uplink synchronous configuration flow to the target neighbor base station; Specifically comprise: up special burst is sent in the base station of mobile terminal physical course target adjacent area; During the descending special burst that receives that the base station replys, send dedicated channel to the mobile terminal protocol stack and indicate synchronously; The mobile terminal protocol stack receives dedicated channel when indicating synchronously, and the RNC up channel of notification target adjacent area is reshuffled completion.
Because if the sub-district switch mode is the direct-cut operation pattern; Portable terminal is initiated the uplink synchronous configuration flow to the target neighbor base station; Specifically comprise: the mobile terminal physical layer sends uplink synchronous information through the ascending pilot frequency physical channel to the base station of target adjacent area, and receives the base station through physical access channel answer uplink synchronous information; Up special burst is sent in the base station of mobile terminal physical course target adjacent area, during the descending special burst that receives that the base station replys, sends dedicated channel to the mobile terminal protocol stack and indicates synchronously; The mobile terminal protocol stack receives dedicated channel when indicating synchronously, and the RNC up channel of notification target adjacent area is reshuffled completion.
Therefore; For baton handover; The reason that causes handoff failure possibly be to send up special burst or receive descending special burst failure; And for direct-cut operation, in addition, also possibly be to send uplink synchronous information or receive the base station through the failure of physical access channel answer uplink synchronous information to the base station of target adjacent area through the ascending pilot frequency physical channel.
Handling process when drawing together the uplink synchronous configuration failure of portable terminal and target neighbor base station specifically comprises the steps:
Step S17: if during the uplink synchronous configuration failure of portable terminal and target neighbor base station, mobile terminal physical course mobile terminal protocol stack transmission physical channel configuration failure information.
Step S18: the mobile terminal protocol stack sends the request of handoff failure rollback to the mobile terminal physical layer.
Step S19: the mobile terminal physical layer is controlled the frequency that frequency is switched back current service cell, will comprise that the community configured information of measuring control, synchronous tracking Control, frequency and Neighboring Cell List reverts to the community configured information of current service cell.
Step S20: the uplink synchronous configuring request is initiated in mobile terminal physical course current service cell base station, and the RNC physical channel reconfiguration failure of notice current service cell.
Above-mentioned method as shown in Figure 1 has provided the handling process of terminal physical layer when receiving the request of switching the sub-district.The processing procedure of physical layer is the critical process in the handoff procedure, makes portable terminal keep synchronized relation from the link that keeps synchronized relation to switch to the target adjacent area with the link of current service cell.As shown in Figure 2, provided the Signalling exchange flow chart between each module of physical layer in the handoff process of above-mentioned mobile terminal physical layer.
Step S21: uplink service control module notice radio frequency control (RFC) module is closed ascending time slot.
Mainly responsible frequency switching of radio frequency control module and time slot are opened and are closed.By the uplink service control module switching time to after date, send earlier ascending time slot and close notice (CloseUlSlot) and realize controlling radio frequency control module temporary close ascending time slot.And then notice downlink business control module starts follow-up handover operation.
Step S22: after the mobile terminal physical layer received the physical layer handoff request of mobile terminal protocol stack transmission, the uplink service of physical layer control (Uplink) module was sent to downlink business control (DownLink) module and is switched activation request (HandoverAct).
The downlink business control module mainly is responsible for descending transmission channel and physical layer channel and public control and treatment, and the uplink service control module mainly is responsible for uplink transport channel and physical channel and control and treatment.
Step S23: downlink business control module notice is measured the nearby region measurement that control (Measure) module stops current service cell.
Measuring control module mainly is responsible for Serving cell, safeguards with different-frequency measure and co-frequency cell tabulation.
The downlink business control module is received and is switched when activating request, measures expiry notification message (StopMeas) to measuring the control module transmission, and notice is measured control module and stopped the measuring process on the current service cell.
This moment is preferred, can preserve the community configured information of current service cell.
Step S24: downlink business control module notice downlink synchronization tracking/auto frequency deviation control (DST/AFC) module stops the synchronous tracking of current service cell.
The tracking Control module mainly is responsible for the control of synchronization timing and frequency deviation synchronously.
The downlink business control module is received and is switched when activating request, follows the tracks of expiry notification message (StopDst/Afc) to measuring the control module transmission, notifies synchronous tracking Control module to stop the synchronous tracing process on the current service cell.
Can ask synchronous tracking Control module to preserve current service cell timing and frequency deviation control word information in order to prevent handoff failure this moment, when the handoff failure rollback, recovers this synchronizing information, thereby improve the success rate of handoff failure rollback.
Step S25: downlink business control module notice radio frequency control module is closed descending time slot and frequency is switched to the frequency that the target adjacent area belongs to.
The downlink business control module is received and is switched when activating request, sends frequency switching message/descending time slot to radio frequency control module and closes notification message (FreqChange/CloseDlSlot), and the notice radio frequency control module is switched frequency and closed descending time slot.
Step S26: the downlink business control module is to the homogeneous-frequency adjacent-domain tabulation of measuring control module acquisition request target adjacent area.
The downlink business control module is obtained message (GetlntraCellList) to measuring control module transmission tabulation, obtains the homogeneous-frequency adjacent-domain tabulation of target adjacent area from measuring control module.
Step S27: the downlink business control module is obtained the homogeneous-frequency adjacent-domain tabulation of measuring the target adjacent area that control module provides.
Measure control module and return Neighboring Cell List response message (lntraCellListCnf) provides homogeneous-frequency adjacent-domain tabulation from the target adjacent area to the downlink business control module.And carry out the synchronous tracking of target adjacent area link for synchronous tracking Control module the homogeneous-frequency adjacent-domain list configuration of obtaining.
Above-mentioned steps S26 and step S27 have realized obtaining from measurement module the homogeneous-frequency adjacent-domain tabulation of target adjacent area.
Step S28: the downlink business control module notifies synchronous tracking Control module to open the synchronous tracking of target adjacent area.
The downlink business control module is sent tracking unlatching notification message (StartDst/Afc) to measuring control module, notifies synchronous tracking Control module to open the synchronous tracing process on the target adjacent area.
Step S29: the downlink business control module receives the downlink synchronization tracking indication that synchronous tracking Control module is replied.
The tracking Control module is tabulated according to homogeneous-frequency adjacent-domain and is followed the tracks of synchronously synchronously; Synchronously the tracking Control module maybe be because the adjustment of radio frequency automatic gain control AGC and instability, behind the down-bound pilot frequency signal DwPts that stably traces into the target adjacent area synchronously under the transmission of downlink business control module line trace indicate (DlSyncInd) synchronously.
Step S30: downlink business control module notice radio frequency control module is opened descending time slot.
The downlink business control module is sent descending time slot to radio frequency control module and is opened notification message (OpenDlSlot), and the notice radio frequency control module is opened descending time slot.What opened this moment is the downlink business time slot of target adjacent area, and the configurating downlink channel begins to detect downlink business.
Step S31: the downlink business control module is initiated up configuring request to the uplink service control module.
After opening the downlink business time slot, begin to carry out the uplink service configuration.Be to begin the uplink service configuration after the uplink service control module receives the up configuring request (UlRecfgReq) that the downlink business control module sends.
Above-mentioned steps S21-step S31 has realized that specifically the downlink business control module according to switching the request of activation, will comprise the community configured information that measurement is controlled, the community configured information of tracking Control, frequency and Neighboring Cell List changes to the target adjacent area synchronously.
Step S32: the uplink service control module is obtained the signal strength signal intensity of target adjacent area from measuring control module.
The uplink service control module receives the reporting signal strength message (GetRscp) of the target adjacent area of measuring the control module transmission, obtains the signal strength information of target adjacent area, like received signal code power RSCP information.
Step S33: uplink service control module control radio frequency control module is opened ascending time slot.
After obtaining target neighboring area signal strength information, open ascending time slot after the information such as calculating open loop transmitted power, timing and carry out uplink service.
The uplink service control module is sent ascending time slot unlatching notice (OpenUlSlot) realization control radio frequency control module and is opened ascending time slot.
Above-mentioned steps S21-step S33 has realized the community configured information change of portable terminal is configured to the community configured information of target adjacent area.
After handling process when above-mentioned physical layer is switched in the sub-district; The target neighbor base station of mobile terminal physical course network side is initiated the process of uplink synchronous configuration; When configuration failure; Mobile terminal physical course mobile terminal protocol stack sends physical channel configuration failure information, and the mobile terminal protocol stack sends the request of handoff failure rollback to the mobile terminal physical layer.The mobile terminal physical layer is controlled the frequency that frequency is switched back current service cell, will comprise that the community configured information of measuring control, synchronous tracking Control, frequency and Neighboring Cell List reverts to the community configured information of current service cell; Initiate the uplink synchronous configuring request to the current service cell base station, and the RNC physical channel reconfiguration failure of notice current service cell.Wherein, the processing procedure of mobile terminal physical layer specifically comprises the following steps:
Step S34: downlink business control module notice radio frequency control module is closed descending time slot and frequency is switched to the frequency that current service cell belongs to.
The downlink business control module is received and is switched when activating request, sends frequency switching message/descending time slot to radio frequency control module and closes notification message (FreqChange/CloseDlSlot), and the notice radio frequency control module is switched frequency and closed descending time slot.
Step S35: the downlink business control module is to the homogeneous-frequency adjacent-domain tabulation of measuring control module acquisition request current service cell.
The downlink business control module is obtained message (GetlntraCellList) to measuring control module transmission tabulation, obtains the homogeneous-frequency adjacent-domain tabulation of current service cell from measuring control module.
Step S36: the downlink business control module is obtained the homogeneous-frequency adjacent-domain tabulation of measuring the current service cell that control module provides.
Measure control module and return Neighboring Cell List response message (lntraCellListCnf) provides homogeneous-frequency adjacent-domain tabulation from current service cell to the downlink business control module.
Above-mentioned steps S35 and step S36 have realized obtaining from measurement module the homogeneous-frequency adjacent-domain tabulation of current service cell.
Step S37: the downlink business control module notifies synchronous tracking Control module to open the synchronous tracking of current service cell.
The downlink business control module is sent tracking unlatching notification message (StartDst/Afc) to measuring control module, notifies synchronous tracking Control module to open the synchronous tracing process on the current service cell.
Can utilize the configuration information of the current service cell of storage here, reach the purpose of fast return.
Step S38: the downlink business control module receives the downlink synchronization tracking indication that synchronous tracking Control module is replied.
The tracking Control module is replied to follow the tracks of and is opened acknowledge message (Dlsynclnd) to the downlink business control module synchronously.
Step S39: downlink business control module notice radio frequency control module is opened descending time slot.
The downlink business control module is sent descending time slot to radio frequency control module and is opened notification message (OpenDlSlot), and the notice radio frequency control module is opened descending time slot.
Step S40: the downlink business control module is initiated up configuring request to the uplink service control module.
The uplink service control module receives the up configuring request (UlRecfgReq) that the downlink business control module is sent.
Above-mentioned steps S34-step S40 has realized that specifically the downlink business control module according to switching the request of activation, will comprise the community configured information that measurement is controlled, the community configured information of tracking Control, frequency and Neighboring Cell List changes to current service cell synchronously.
Step S41: radio frequency control module temporary close ascending time slot.
The uplink service control module is sent ascending time slot and is opened notice (CloseUlSlot) realization control radio frequency control module temporary close ascending time slot.
Step S42: the uplink service control module is obtained the signal strength signal intensity of current service cell from measuring control module.
The uplink service control module receives the reporting signal strength message (GetRscp) of the current service cell of measuring the control module transmission, obtains the signal strength information of current service cell.
Step S43: uplink service control module control radio frequency control module is opened ascending time slot.
The uplink service control module is sent ascending time slot unlatching notice (OpenUlSlot) realization control radio frequency control module and is opened ascending time slot.
Above-mentioned steps S34-step S43 has realized the community configured information change of portable terminal is configured to the community configured information of target adjacent area.
The processing procedure of above-mentioned physical layer is applicable to TD-SCDMA terminal handover; With the current service cell is Cell1; The target adjacent area of switching is that Cell2 is an example, and what then step S21-step S33 realized is that portable terminal is kept synchronously from the link that the link with current service cell Cell1 keeps switching to synchronously with target adjacent area Cell2; Step S34-step S43 is when switching the trial failure, makes portable terminal recover to keep link synchronization as for current service cell Cell1.
When the method flow of above-mentioned Fig. 1 and Fig. 2 had been described the sub-district switching, the handling process of mobile terminal side was described portable terminal and the base station of network side and the interaction flow of RNC below in detail.Portable terminal is as shown in Figure 3 to the concrete implementation procedure of target adjacent area switching from current service cell, comprises the steps:
Step S101:RNC sends measurement control message to mobile terminal protocol stack.
The current service cell of supposing portable terminal is sub-district Cell1; Portable terminal communicates business on the Cell1 of sub-district; When portable terminal at the signal that arrives portable terminal away from sub-district Cell1 or sub-district Cell1 since the transmission path sudden change receive when weakening; The signal that portable terminal receives sub-district Cell1 will die down, and service feature will variation, and this moment is not if there is new Target cell that Connection Service is provided; Then portable terminal can lose and the service synchronization of former Serving cell Cell1 relation, and the business of portable terminal connects and will break off.So general portable terminal is being set up with after the communication of sub-district Cell1 is connected, the RNC of sub-district Cell1 will pass through the adjacent area that measurement control message (MeasCtl) is notified portable terminal sub-district Cell1, comprises co-frequency cell, alien-frequency district or intersystem cell.So that portable terminal is measured the adjacent area of Cell1, so that realize follow-up switching.
Step S102: after the mobile terminal protocol stack was resolved measurement control message, physical layer was given in configuration.
After the mobile terminal protocol stack receives MeasCtl message; Measurement capability and system configuration according to portable terminal determine whether needs are measured the adjacent area of Cell1, and the portable terminal of TD-SDMA system generally all must be supported the measurement to homogeneous-frequency adjacent-domain in the system and these two types of adjacent areas, alien frequencies adjacent area.The protocol stack of portable terminal with the MeasCtl message parse after configuration give physical layer so that physical layer is carried out nearby region measurement.
Step S103: after physical layer is carried out nearby region measurement, give protocol stack with reporting measuring result.
After physical layer receives the nearby region measurement request, can measure Serving cell Cell1 and adjacent area thereof at interval according to the physical layer Business Processing, and give the mobile terminal protocol stack according to certain periodic report.
Step S104: the mobile terminal protocol stack is to the RNC reporting measurement reports.
When the measures signal quality that the mobile terminal protocol stack monitors certain adjacent area is superior to current service cell and during a period of time that continues to set, send measurement report to the RNC of sub-district Cell1.
Step S105:RNC confirms and need when switch the adjacent area, send the physical channel reconfiguration request message to the mobile terminal protocol stack.
It is that protocol layer is when receiving the measurement control message that the RNC of current service cell sends that above-mentioned steps S101-step S105 has described the mobile terminal protocol stack; Obtain measurement result from the mobile terminal physical layer to the adjacent area; And the measurement report that reports the measurement result that comprises the adjacent area gives the RNC of current service cell, so that the RNC of current service cell is according to measurement report select target adjacent area and determine whether to switch to the target adjacent area.
The RNC of current service cell judges whether that according to the handover decisions of self needs switch to the terminal target adjacent area of reporting in the measurement report; Then do not reply the terminal if be judged as need not switch; If be judged as and then obtain the target channels of neighboring areas resource of switching when needing to switch; If the target adjacent area has available resource then to send physical channel reprovision request (PhyChRecfg) message to the terminal; Comprise the target adjacent area in the physical channel reprovision request message, like sub-district Cell2, community configured information and bearer service channel transmitted resource.
Step S106: the mobile terminal protocol stack sends the physical layer handoff request to physical layer.
After the terminal protocol stack is received physical channel reprovision request message, parse required parameter information of physical layer configurations and configuration to the mobile terminal physical layer.
After parameter information is sent to physical layer, step S13-step 14 or say the layoutprocedure of the mobile terminal physical layer of step S21-step S33 in the execution graph 1.
Step S107: up special burst is sent in the base station of mobile terminal physical course target adjacent area.
After the configuration of mobile terminal physical layer accomplished, begin to carry out and initiate the uplink synchronous configuration flow to the target neighbor base station.Method flow shown in Figure 3 is that example describes with the baton handover, therefore sends up special burst to the base station of target adjacent area.
Terminal physical layer stops and beginning being connected of current service cell Cell1 carrying out the process of switching to target adjacent area Cell2 at the activationary time that physical channel reprovision request message message is disposed to after date, and the activationary time here is definite according to Connection Frame Number (CFN).
If direct-cut operation; Then carry out and also need carry out the mobile terminal physical layer before this step and send uplink synchronous information to the base station of target adjacent area through the ascending pilot frequency physical channel; And receive the base station and reply uplink synchronous information, the up transmission skew (Tadv) of obtaining according to uplink synchronous then and the initialization (Tadv) and the power of the up special burst of power calculation (ULSb) through physical access channel.And for baton handover, then directly information is sent in open loops such as the initialization (Tadv) of collocating uplink special burst (ULSb) and power.
Step S108: the target neighbor base station is replied descending special burst to the mobile terminal physical layer.
After UlSb sent to the base station of target adjacent area Cell, the base station of target adjacent area Cell2 can issue descending special burst (DlSb) to portable terminal.
Step S109: mobile terminal physical course mobile terminal protocol stack sends dedicated channel and indicates synchronously.
After the reception signal interference ratio (SIR) that the mobile terminal physical layer detects DlSb was higher than synchronous thresholding, terminal physical layer reported dedicated channel to indicate (InSyncInd) synchronously to protocol stack.
Step S110: the mobile terminal protocol stack sends physical channel to the target neighbor base station and reshuffles completion message.
The terminal protocol stack receive think after the dedicated channel indication synchronously portable terminal from current service cell Cell1 to target adjacent area Cell2 handover success, and begin to send the physical channel reprovision and accomplish message (PhyChRecfgCmp) to the RNC of target adjacent area Cell2.
Step S111: the target neighbor base station sends the physical channel reprovision to portable terminal and accomplishes acknowledge message.
Affirmation indication (PhyChRecfgCmpCnf) can be replied after receiving PhyChRecfgCmp in the base station of target adjacent area Cell2, and expression PhyChRecfgCmp sends successfully, and the PhyChRecfgCmpCnf here is not a real messages, only is that packet is confirmed.
Step S112: the target neighbor base station sends the physical channel reprovision to RNC and accomplishes message.
Step S113:RNC sends measurement control message to portable terminal again.
After the target neighbor base station is reported to the RNC of target adjacent area Cell2 with physical channel reprovision completion message (PhyChRecfgCmp); The RNC of Cell2 thinks that portable terminal has switched on the Cell2 of target adjacent area; Again send measurement control message (MeasCtl) to portable terminal; The information such as Neighboring Cell List of notice portable terminal target adjacent area Cell2, portable terminal carries out business through sub-district Cell2 and connects.
The terminal protocol stack receives after the measurement control message and to continue the signal quality of monitor cell Cell2 and homogeneous-frequency adjacent-domain thereof to the physical layer configurations measurement request, and sub-district Cell2 becomes the current service cell of portable terminal, and the handover of portable terminal is accomplished.
Portable terminal switches but the detailed process of handoff failure is as shown in Figure 4 to the adjacent area from current service cell, comprises the steps:
Step S201: the RNC of current service cell confirms and need when switch the adjacent area, send physical channel reprovision request message to the mobile terminal protocol stack.
Referring to step S105.
Step S202: the mobile terminal protocol stack sends the physical layer handoff request to physical layer.
Referring to step S106.This moment, the mobile terminal physical layer was carried out physical layer handoff request (HandoverReq), and disconnection is connected with current service cell Cell1's, and trial is connected with target adjacent area Cell2's.
Step S203: mobile terminal physical course neighbor base station request handoff failure.It is the uplink synchronous configuration failure of portable terminal and target neighbor base station.
In the Target cell handoff procedure, possibly cause handoff failure because the environment of the switching net synchronization capability of portable terminal or Target cell changes, portable terminal need return back to current service cell as early as possible behind the handoff failure.
Referring to above-mentioned steps S107 and step S108, if baton handover, mobile terminal physical course neighbor base station request handoff failure generally takes place in this two step; Promptly detect the dedicated channel step-out and indicate (OutSyncInd), and report the mobile terminal protocol stack owing to UlSb sends with the DlSb receiving course failure.
If direct-cut operation; Except that these two steps take place, also maybe before the mobile terminal physical layer send uplink synchronous information and receive the base station and reply in these two steps of uplink synchronous information through physical access channel and take place to the base station of target adjacent area through the ascending pilot frequency physical channel.Promptly maybe be because ascending pilot frequency physical channel (UpPch) send to receive with physical access channel (FpachInd) fails when carrying out uplink synchronous, also maybe be because UlSb sends and the DlSb receiving course is failed detects the dedicated channel step-out and indicate (OutSyncInd).
Step S204: mobile terminal physical course mobile terminal protocol stack sends physical channel configuration failure information.
Portable terminal is when neighbor base station request handoff failure, and needing as early as possible, rollback does not interrupt to guarantee communication to current service cell.
For direct-cut operation; During the failure of portable terminal uplink synchronous; The mobile terminal physical layer can report physical channel configuration failure message (DlPhyChRecfgCnf (1)) to the terminal protocol stack; Wherein parameter 1 expression handoff failure then reports physical channel reprovision success message (DlPhyChRecfgCnf (0)) if uplink synchronous is successful, and parameter 0 is represented successfully.
Even the uplink synchronous success is the same with baton handover, also might and detect dedicated channel step-out indication (OutSyncInd) in UlSb transmission and the failure of DlSb receiving course, also can report mobile terminal protocol stack sign handoff failure this moment.When detecting dedicated channel step-out when indication, the mobile terminal protocol stack utilizes the channel configuration of current service cell to return back on the former Serving cell after receiving the handoff failure that physical layer reports at once.
Step S205: the mobile terminal protocol stack sends the request of handoff failure rollback to the mobile terminal physical layer.
After the mobile terminal physical layer is received handoff failure rollback request (HandoverBackReq), stop the link of synchronous tracking target adjacent area Cell2, current service cell Cell1 is arrived in link switchover.At this moment, step S19 or say the layoutprocedure of the mobile terminal physical layer of step S34-step S43 in the mobile terminal physical layer execution graph 1.
Step S206: up special burst is sent in the base station of mobile terminal physical course current service cell.
Recover the community configured information of current service cell at the mobile terminal physical layer after, send up special burst (UlSb), with the information of the mutual handoff failure of network side.
Step S207: descending special burst is replied in the current service cell base station.
Step S208: mobile terminal physical course protocol stack sends dedicated channel and indicates synchronously.
After the mutual completion of affirmation of mobile terminal physical layer and current service cell base station, send dedicated channel to protocol stack and indicate synchronously.
Step S209: the mobile terminal protocol stack sends physical channel reconfiguration failure message to the current service cell base station.
The mobile terminal protocol stack indicates the back to send physical channel reprovision failed message (PhyChRecfgFail) to current service cell Cell1 receiving dedicated channel synchronously, notice current service cell base station cell handoff failure.
Step S210: physical channel reconfiguration failure acknowledge message is replied to portable terminal in the current service cell base station.
Current service cell Cell1 receives physical channel reprovision failed message (PhyChRecfgFail) back and replys protocol stack physical channel reconfiguration failure acknowledge message (PhyChRecfgFailCnf); The PhyChRecfgFailCnf here is not a real messages; Only be that packet is confirmed, the notice portable terminal successfully receives physical channel reprovision failed message.
Step S211: physical channel reconfiguration failure message is sent to current service cell RNC in the current service cell base station.
Current service cell Cell1 reports this message to the RNC of current service cell after receiving physical channel reprovision failed message (PhyChRecfgFail), so that RNC is known the sub-district handoff failure, requires current service cell to carry out nearby region measurement again.
Step S212: current service cell RNC resends measurement control message to portable terminal.
The RNC of current service cell resends measurement control message (MeasCtl) and gives the mobile terminal protocol stack, and the terminal protocol stack reconfigures the nearby region measurement that physical layer is carried out current service cell Cell1 again, the success of sign handoff failure rollback.
Can not the rollback success if portable terminal switches the operation return back to current service cell; Then the terminal protocol stack can discharge current dedicated channel and connects and get back to Idle state, and in the time that allows, continue to attempt with sub-district Cell1 be connected or again to the Cell2 of target adjacent area trial set up communication link.
The difference of baton handover and direct-cut operation is described below.
Portable terminal is in order to simplify the control of protocol stack to physical layer, and baton handover and direct-cut operation all issue in same physical layer channel configuration messages, just can in uplink physical channel configuration messages (UlPhyChRecfgReq), indicate switching mode.If direct-cut operation can be in uplink physical channel configuration messages (UlPhyChRecfgReq) the synchronous information needed of collocating uplink, if baton handover then need not be disposed, the transmission of directly carrying out UlSb receives reciprocal process.
After the mobile terminal protocol stack receives the physical channel reconfiguration request; After physical layer receives handoff request; For the processing procedure of direct-cut operation and baton handover with inequality; The uplink service control module can adopt still direct-cut operation (Hard Handover) of baton handover (Relay Handover) according to the switching mode sign in the uplink physical channel configuration messages (UlPhyChRecfgReq) decision, is the example explanation with the baton handover among above-mentioned Fig. 3 and Fig. 4, and the handling process of direct-cut operation after physical layer receives handoff request is described below; Specifically as shown in Figure 5, comprise the steps:
Step S301: the mobile terminal protocol stack sends the down physical channel reconfiguration information to the downlink business control module of physical layer.
After the mobile terminal protocol stack receives the physical channel reconfiguration request of RNC transmission, send the down physical channel reconfiguration information to the downlink business control module of physical layer.
Step S302: the mobile terminal protocol stack sends the uplink physical channel reconfiguration information to the uplink service control module of physical layer.
Because the configuration information of switching mode is in the uplink physical channel configuration messages,, and carry out different processing according to the difference of switching mode tracing on the link of target adjacent area the back synchronously so the moment of switching is triggered by physical layer upload control module.
Step S303: the uplink service control module is sent physical access channel and is disposed to the downlink business control module.
Step S304: the uplink service control module is sent the base station that ascending pilot frequency information is given the target adjacent area.
This step is for sending the process of UpPch.
Step S305: the target neighbor base station sends rapid physical access channel information and gives the downlink business control module.
This step is for receiving the process of FpachInd.
If handoff failure occurs at step S304 and step S305, then direct-cut operation need report physical channel configuration failure message DlPhyChRecfgCnf (1) expression handoff failure in advance.
For direct-cut operation, physical layer uplink service control module sends to the base station by physical layer uplink service control module after the transmission parameter that calculates UpPch such as reference signature number (UlSyncId), transmission subframe numbers, transmission skew and transmitted power.The physical layer descending message control module is gone up in corresponding physical access channel (Fpach channel) and is detected FpachInd; If the physical layer descending message control module does not detect FpachInd at the appointed time; Then can carry out this uplink synchronous process again, until the number of times of regulation, if still do not detect; Then report the direct-cut operation failure through physical channel configuration failure message DlPhyChRecfgCnf (1)
Step S306: the downlink business control module is sent physical channel configuration information to the mobile terminal protocol stack.
The downlink business control module is sent the physical access channel configuration according to receiving rapid physical access channel information and uplink service control module, sends physical channel configuration information to the mobile terminal protocol stack.
Step S307: the uplink service control module is sent the base station that up special burst is given the target adjacent area.
If in step S305; Detect FpachInd at the appointed time and then report physical channel configuration successful message DlPhyChRecfgCnf (0); And proceed the transmission of up special burst and receive the reciprocal process of descending special burst, report protocol stack to represent the direct-cut operation success after detecting synchronous indication InSyncInd.
Step S308: the target neighbor base station sends descending special burst and gives the downlink business control module.
Step S309: the downlink business control module is sent dedicated channel to the mobile terminal protocol stack and is indicated synchronously.
The detection dedicated channel of downlink business control module down-going synchronous is indicated (InSyncInd) synchronously and is reported protocol stack to get final product, and knows handover success, and this all is suitable for to baton handover and direct-cut operation.If handoff failure occurs at step S307 and step S308, then can detect descending step-out indication (OutSyncInd), the terminal protocol stack can be initiated the handoff failure rollback at once behind handoff failure.
When the downlink business control module is received the handoff failure rollback when direct-cut operation; Can close radio frequency control module and switch go back to former sub-district at the time slot of Target cell and with frequency; Obtain the co-frequency cell list information of current service cell to measuring control module; And this Neighboring Cell List disposed the synchronous tracking of carrying out the current service cell link to synchronous tracking Control module; This moment since before preserved timing and the frequency deviation information on the current service cell, follow the tracks of idle module synchronously and carry out tracking meeting synchronously on this basis and restrain faster and more accurately.The downlink business control module is opened the business time-slot of current service cell after receiving that (DlSyncInd) indicated in line trace synchronously down, recover the downlink business of current service cell current service cell.The uplink service control module is closed the time slot and the uplink service of target adjacent area equally when receiving the handoff failure rollback, recover the time slot and the uplink service of current service cell., the downlink business control module report protocol stack to accomplish the handoff failure rollback flow process of physical layer after detecting the down-going synchronous indication.This process can be with reference to shown in Figure 1.
The step S303-step S306 that comprises in the flow process of above-mentioned direct-cut operation be baton handover the step that need not carry out.
The mobile terminal skip zone switching method that provides based on the embodiment of the invention; The embodiment of the invention also provides a kind of mobile terminal skip zone to switch the realization system; Its structure is as shown in Figure 6, comprising: the base station 20 of portable terminal 10, some sub-districts and radio network controller (RNC) 30.
Portable terminal 10 is used for receiving through protocol layer the physical channel reprovision request of the definite request handed over service sub-district of when switch the target adjacent area, sending of RNC of current service cell, resolves physical channel reprovision request and also is given to physical layer; Ascending time slot is closed in physical layer control, the community configured information change of portable terminal is configured to the community configured information of target adjacent area after, obtain the target neighboring area signal intensity of measurement and open ascending time slot; Wherein, community configured information comprises measurement control, synchronous tracking Control, frequency and Neighboring Cell List; Physical layer is initiated the uplink synchronous configuration flow to the target neighbor base station after accomplishing the community configured information change of portable terminal, and after configuration is accomplished the RNC of notification target adjacent area.
Preferably, above-mentioned portable terminal 10 also is used for:
When receiving the measurement control message that the RNC of current service cell sends through protocol stack; Obtain measurement result from physical layer to the adjacent area; And the measurement report that reports the measurement result that comprises the adjacent area gives the RNC of current service cell, so that the RNC of current service cell is according to measurement report select target adjacent area and determine whether to switch to the target adjacent area.
Preferably, above-mentioned portable terminal 10 specifically comprises:
If the sub-district switch mode is the baton handover pattern, send up special burst through physical layer to the base station of target adjacent area, during the descending special burst that receives that the base station replys, send dedicated channel to protocol stack and indicate synchronously; Receive dedicated channel when indicating synchronously through protocol stack, the RNC up channel of notification target adjacent area is reshuffled completion.
If the sub-district switch mode is the direct-cut operation pattern, sends uplink synchronous information through the ascending pilot frequency physical channel to the base station of target adjacent area through physical layer, and receive the base station through physical access channel answer uplink synchronous information; Send up special burst through physical layer to the base station of target adjacent area, during the descending special burst that receives that the base station replys, send dedicated channel to protocol stack and indicate synchronously; Protocol stack receives dedicated channel when indicating synchronously, and the RNC up channel of notification target adjacent area is reshuffled completion.
Preferably, above-mentioned portable terminal 10 also is used for:
If during, send physical channel configuration failure information to protocol stack through physical layer with the uplink synchronous configuration failure of target neighbor base station; Send the request of handoff failure rollback through protocol stack to physical layer; Control the frequency that frequency is switched back current service cell through physical layer, will comprise that the community configured information of measuring control, synchronous tracking Control, frequency and Neighboring Cell List reverts to the community configured information of current service cell; Initiate the uplink synchronous configuring request to the current service cell base station, and the RNC physical channel reconfiguration failure of notice current service cell.
Based on mobile terminal skip zone switching method and system that the embodiment of the invention provides, the embodiment of the invention also provides a kind of portable terminal, and its structure is as shown in Figure 7, comprising: protocol layer processing module 11 and physical layer process module 12.
Protocol layer processing module 11; The physical channel reprovision request of the request handed over service sub-district that the radio network controller (RNC) that is used to receive current service cell is confirmed when switch the target adjacent area, to send, parsing physical channel reprovision request also is given to physical layer process module 20.
Physical layer process module 12 is used for control and closes ascending time slot, the community configured information change of portable terminal is configured to the community configured information of target adjacent area after, obtain the target neighboring area signal intensity of measurement and open ascending time slot; Community configured information comprises measures control, synchronous tracking Control, frequency and Neighboring Cell List; After accomplishing the community configured information change of portable terminal, initiate the uplink synchronous configuration flow to the target neighbor base station, and after configuration is accomplished the RNC of notification target adjacent area.
Preferably, above-mentioned physical layer process module 12 specifically comprises: uplink service control module 121 and radio frequency control module 122.
Uplink service control module 121 is used to control radio frequency control module 122 and closes ascending time slot.
Preferably, above-mentioned physical layer process module 12 also comprises: downlink business control module 123.
Above-mentioned uplink service control module 121 also is used for sending switching to downlink business control module 123 and activates request.
Downlink business control module 123 is used for will comprising the community configured information that measurement is controlled, the community configured information of tracking Control, frequency and Neighboring Cell List changes to the target adjacent area synchronously according to switching the request of activation.
Preferably, above-mentioned physical layer process module 12 also comprises: synchronous tracking Control module 124 and measurement control module 125.
Downlink business control module 123; Also be used to notify measurement control module 125 to stop the nearby region measurement of current service cell; The synchronous tracking of notifying synchronous tracking Control module to stop current service cell, notice radio frequency control module 122 are closed descending time slot and frequency are switched to the frequency that the target adjacent area belongs to.
Downlink business control module 123; Also be used for after measure control module 125 and obtain the homogeneous-frequency adjacent-domain tabulation of target adjacent area; Notify synchronous tracking Control module 124 to open the synchronous tracking of target adjacent area, notice radio frequency control module 122 is opened descending time slot and is initiated up configuring request to the uplink service control module.
Preferably, above-mentioned uplink service control module 121 also is used for obtaining the signal strength signal intensity of target adjacent area from measuring control module 125; And control radio frequency control module 124 is opened ascending time slot.
Preferably; Above-mentioned protocol layer processing module 11; Also be used for: when receiving the measurement control message that the RNC of current service cell sends; Obtain measurement result from the physical layer process module, and report the measurement report of the measurement result that comprises the adjacent area to give the RNC of current service cell, so that the RNC of current service cell is according to measurement report select target adjacent area and determine whether to switch to the target adjacent area the adjacent area.
Preferably; Above-mentioned physical layer process module 12 specifically is used for: if the sub-district switch mode is the baton handover pattern, send up special burst to the base station of target adjacent area; During the descending special burst that receives that the base station replys, send dedicated channel to the protocol layer processing module and indicate synchronously; If the sub-district switch mode is the direct-cut operation pattern; Send uplink synchronous information through the ascending pilot frequency physical channel to the base station of target adjacent area; And receive the base station through physical access channel answer uplink synchronous information; And send up special burst to the base station of target adjacent area, during the descending special burst that receives that the base station replys, send dedicated channel to the protocol layer processing module and indicate synchronously.
Protocol layer processing module 12, when also being used to receive dedicated channel and indicating synchronously, the RNC up channel of notification target adjacent area is reshuffled completion.
Preferably, above-mentioned physical layer process module also is used for: if during the uplink synchronous configuration failure of portable terminal and target neighbor base station, to protocol layer processing module transmission physical channel configuration failure information; And control the frequency that frequency is switched back current service cell, will comprise that the community configured information of measuring control, synchronous tracking Control, frequency and Neighboring Cell List reverts to the community configured information of current service cell; Initiate the uplink synchronous configuring request to the current service cell base station, and the RNC physical channel reconfiguration failure of notice current service cell.
Protocol layer processing module 12 also is used for sending the request of handoff failure rollback to the physical layer process module.
Preferably, the downlink business control module that comprises of above-mentioned physical layer process module, radio frequency control module, measurement control module, uplink service control module and tracking Control module synchronously; Following function is also specifically arranged:
Downlink business control module 123 also is used to notify radio frequency control module 124 frequency to be switched back the frequency of current service cell.
Downlink business control module 123; Also be used for obtaining the homogeneous-frequency adjacent-domain tabulation of current service cell from measuring control module 125; Notify synchronous tracking Control module 122 to open the synchronous tracking of current service cell, notice radio frequency control module 124 is opened descending time slot and is initiated up configuring request to uplink service control module 121.
The uplink service control module also is used for the up configuring request according to 123 transmissions of downlink business control module, obtains the signal strength signal intensity of current service cell, and notice radio frequency control module 124 is opened ascending time slots.
Mobile terminal skip zone switching method, system and portable terminal that the embodiment of the invention provides have provided the physical layer detailed design method of TD-SCDMA terminal handover, have solved TD-SCDMA terminal handover physical layer problem of implementation.This scheme, is easy to the terminal and realizes that synchronization timing switches more stable, has improved handover success rate to baton handover and direct-cut operation design switching flow based on the characteristics of TD-SCDMA system.
Said method has provided new relay switching method on the basis that guarantees successful switch, only need to keep the baton handover of a down link can realize the sub-district switching; Designed and passed through the judgement of handoff failure and the recovery of synchronization timing; When handoff failure, can trigger handoff failure rollback flow process as early as possible; And provided physical layer information saving/restoring such as synchronization timing mechanism, and improve the success rate of handoff failure rollback, prevent the call drop that produces because of switching; Reduce the cutting off rate that switches, the present invention program has very strong practicality.
Said method handoff failure rollback is timely; Avoid switching time oversize; The traffic affecting continuity, synchronization timing saving/restoring mechanism guaranteed the success rate of handoff failure rollback, that has improved mobile terminal call when having reduced the cutting off rate that switches keeps performance for a long time.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention; But as previously mentioned; Be to be understood that the present invention is not limited to the form that this paper discloses, should do not regard eliminating as, and can be used for various other combinations, modification and environment other embodiment; And can in invention contemplated scope described herein, change through the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of accompanying claims of the present invention.