CN103716872B - Uplink synchronous method of adjustment and device in TDD system - Google Patents

Uplink synchronous method of adjustment and device in TDD system Download PDF

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Publication number
CN103716872B
CN103716872B CN201210379499.2A CN201210379499A CN103716872B CN 103716872 B CN103716872 B CN 103716872B CN 201210379499 A CN201210379499 A CN 201210379499A CN 103716872 B CN103716872 B CN 103716872B
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tadv
current area
variable
timing
cell
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CN103716872A (en
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郭坤飞
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Sanechips Technology Co Ltd
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ZTE Corp
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Priority to CN201210379499.2A priority Critical patent/CN103716872B/en
Priority to PCT/CN2013/083633 priority patent/WO2014056388A1/en
Priority to CN201380052749.4A priority patent/CN104737601B/en
Publication of CN103716872A publication Critical patent/CN103716872A/en
Priority to HK15109473.0A priority patent/HK1208984A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses uplink synchronous method of adjustment and device in a kind of TDD system.This method includes：Step 1, previous cell information is stored in the first variable, and judges whether directly obtain the up transmitting lead Tadv of current area, if it is, performing step 2, otherwise, perform step 3；Step 2, the Tadv of current area is obtained, calculates the final up transmission timing of current area, and current cell information storage is performed into step 4 into the second variable；Step 3, by current cell information storage into the second variable, judge whether the first variable and the second variable are identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, if differed, obtain descending timing difference, the Tadv of current area is obtained, the final up transmission timing of current area is calculated according to the Tadv, performs step 4；Step 4, the cell information in the second variable is updated into the first variable.

Description

Uplink synchronous method of adjustment and device in TDD system
Technical field
The present invention relates to field of mobile communication, more particularly to a kind of time division duplex（Time Division Duplexing, referred to as TDD）Uplink synchronous method of adjustment and device in system.
Background technology
In a tdd system, what terminal was likely encountered needs the scene of uplink synchronous adjustment to include：Initial link setup, match somebody with somebody again Put, baton handover, baton handover unsuccessfully retracts, direct-cut operation, direct-cut operation unsuccessfully retract and bimodulus handoff failure retract etc. field Scape.In above-mentioned scene, except initial link setup and direct-cut operation can directly obtain up transmitting when carrying out uplink synchronous and shift to an earlier date Amount（Tadv）Outside, other scenes are required to obtain indirectly by TPU.
Under external field environment, influence up sending performance mainly has transmission power and Tadv, and up transmission is to Tadv It is most sensitive.For example, when switching over, it is necessary to adjusted soon to Tadv according to descending timing, will if Tadv adjusts mistake soon It is likely to directly result in up transmission exit window so as to handoff failure, and subsequently can not be also lost by slow adjustment and recovery if retracted Lose（As former cell signal is weaker）, voice call drop or data cutout are will result directly in, has a strong impact on Consumer's Experience.
The content of the invention
The present invention provides uplink synchronous method of adjustment and device in a kind of TDD system, to solve in the prior art to Tadv Easily there is the problem of mistake is so as to influence up sending performance in fast timing.
The present invention provides uplink synchronous method of adjustment in a kind of TDD system, including：Step 1, it is determined that needing to carry out up When synchronous, previous cell information is stored in the first variable, and judges whether directly obtain the up hair of current area Lead Tadv is penetrated, if the judgment is Yes, performs step 2, otherwise, performs step 3；Step 2, current area is directly obtained Tadv, the final up transmission timing of current area is calculated according to the Tadv of current area, and current cell information storage is arrived In second variable, step 4 is performed；Step 3, directly by current cell information storage into the second variable, judge the first variable with Whether the second variable is identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, such as Fruit differs, and obtains the descending timing difference of previous cell and current area, and the Tadv according to descending timing difference to previous cell It is adjusted, obtains the Tadv of current area, the final up transmission timing of current area is calculated according to the Tadv of current area, Perform step 4；Step 4, the cell information in the second variable is updated into the first variable.
Preferably, it is necessary to which carrying out the scene of uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover are returned Move back unsuccessfully, direct-cut operation, direct-cut operation unsuccessfully retract and bimodulus handoff failure retract；The Tadv of current area can directly be obtained Scene include：Initial link setup and direct-cut operation；First variable and the second variable identical scene include：Reconfigure；First becomes The amount scene different with the second variable includes：Baton handover, the failure of baton handover rollback, direct-cut operation unsuccessfully retracts and bimodulus Handoff failure retracts.
Preferably, the Tadv for directly obtaining current area is specifically included：Obtained according to quickly accessing in instruction channel FPACH The Tadv of current area.
Preferably, the final up transmission timing for calculating current area specifically includes：Current area is calculated according to formula 1 Final up transmission timing：
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is according to descending timing and frame structure The up timing determined, TX_HW_Delay postpone for hardware handles.
Preferably, the Tadv of previous cell is adjusted according to descending timing difference, the Tadv for obtaining current area is specific Including：The Tadv of previous cell is adjusted according to formula 2, obtains the Tadv of current area；
TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
Wherein, OTD is descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
Present invention also offers uplink synchronous adjusting apparatus in a kind of TDD system, including：Store judge module, for It is determined that when needing to carry out uplink synchronous, previous cell information is stored in the first variable, and judge whether directly to obtain The up transmitting lead Tadv of current area, if the judgment is Yes, the first storage computing module is called, otherwise, calls second Store computing module；First storage computing module, for directly obtaining the Tadv of current area, is counted according to the Tadv of current area The final up transmission timing of current area is calculated, and current cell information storage is called into update module into the second variable；The Two storage computing modules, directly by current cell information storage into the second variable, judge whether are the first variable and the second variable It is identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, if it is not the same, obtaining The descending timing difference of previous cell and current area is taken, and the Tadv of previous cell is adjusted according to descending timing difference, is obtained The Tadv of current area is taken, the final up transmission timing of current area is calculated according to the Tadv of current area, calls renewal mould Block；Update module, the cell information in the second variable is updated into the first variable.
Preferably, it is necessary to which carrying out the scene of uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover are returned Move back unsuccessfully, direct-cut operation, direct-cut operation unsuccessfully retract and bimodulus handoff failure retract；The Tadv of current area can directly be obtained Scene include：Initial link setup and direct-cut operation；First variable and the second variable identical scene include：Reconfigure；First becomes The amount scene different with the second variable includes：Baton handover, the failure of baton handover rollback, direct-cut operation unsuccessfully retracts and bimodulus Handoff failure retracts.
Preferably, the first storage computing module is specifically used for：According to quickly accessing, acquisition in instruction channel FPACH is current small The Tadv in area.
Preferably, the first storage computing module and the second storage computing module are specifically used for：Calculated according to formula 1 current small The final up transmission timing in area：
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is according to descending timing and frame structure The up timing determined, TX_HW_Delay postpone for hardware handles.
Preferably, the second storage computing module is specifically used for：The Tadv of previous cell is adjusted according to formula 2, obtained Take the Tadv of current area；
TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
Wherein, OTD is descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
The present invention has the beneficial effect that：
Tadv by being used for uplink synchronous to terminal under various scenes in a tdd system carries out unified adjustment, solves In the prior art easily occurs the problem of mistake is so as to influence up sending performance on the fast timings of Tadv, it is possible to increase up hair Performance is sent, the voice under the mobile environment of outfield is grown guarantor and is uploaded and is significantly improved with the Mean Speed of downloading data, Greatly reduce the appearance of voice call drop and data cutout situation.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can Become apparent, below especially exemplified by the embodiment of the present invention.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 be the embodiment of the present invention TDD system in uplink synchronous method of adjustment flow chart；
Fig. 2 be the embodiment of the present invention TD-SCDMA system in up-downgoing timing relationship schematic diagram；
Fig. 3 is that the terminal of the embodiment of the present invention carries out Tadv adjustment detail flowcharts under each scene；
Fig. 4 be the embodiment of the present invention TDD system in uplink synchronous adjusting apparatus structural representation.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure Completely it is communicated to those skilled in the art.
In order to solve the problems, such as in the prior art Tadv fast timings easily occur mistake so as to influence up sending performance, The invention provides uplink synchronous method of adjustment and device in a kind of TDD system, in embodiments of the present invention, it is contemplated that work as terminal Reconfigure, baton handover, baton handover unsuccessfully retracts, direct-cut operation unsuccessfully retracts, bimodulus handoff failure retract etc. can not be direct Under the scene for obtaining Tadv, the method that carries out Tadv adjustment indirectly according to TPU.Consider simultaneously straight when initial link setup and direct-cut operation Obtain the scene for taking Tadv, and the modularization realized of software and portability, it is proposed that a kind of suitable for above-mentioned each scene Unified Tadv methods of adjustment.Below in conjunction with accompanying drawing and embodiment, the present invention will be described in further detail.It should manage Solution, the specific embodiments described herein are merely illustrative of the present invention, does not limit the present invention.
Embodiment of the method
According to an embodiment of the invention, there is provided uplink synchronous method of adjustment in a kind of TDD system, Fig. 1 are of the invention real The flow chart of uplink synchronous method of adjustment in the TDD system of example is applied, it is necessary to illustrate, in embodiments of the present invention, it is necessary to enter The scene of row uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover retract failure, direct-cut operation, direct-cut operation Failure retracts and bimodulus handoff failure retracts；The scene for the Tadv that current area can be directly obtained includes：Initial link setup, And direct-cut operation；First variable and the second variable identical scene include：Reconfigure；First variable and the different field of the second variable Scape includes：Baton handover, the failure of baton handover rollback, direct-cut operation unsuccessfully retracts and bimodulus handoff failure retracts.Separately below Analyzed for above scene：
Specifically, identical due to reconfiguring front and rear cell when terminal is reconfigured, Tadv and TPU need not enter The fast adjustment of row, the slow adjustment before continuing to.
When terminal carries out baton handover, baton handover unsuccessfully retracts, direct-cut operation unsuccessfully retracts, bimodulus handoff failure retracts When, because front and rear cell difference, it is necessary to be adjusted soon to Tadv and TPU.Terminal can first carry out TPU adjust soon completion with newly it is small The descending Timing Synchronization in area, afterwards using the relation of up-downgoing timing in TDD system, Tadv is adjusted soon, so as to indirectly Carry out the up Timing Synchronization of new cell.
When terminal carries out initial link setup or direct-cut operation, terminal can carry out uplink synchronous process, directly be obtained just from net side The Tadv of beginning/new cell.Because when carrying out uplink synchronous process, terminal has obtained cell information, so as to it is above-mentioned Each scene be uniformly processed.
In a tdd system, the transmission timing of terminal is in addition to Tadv to be considered, it is also necessary to considers that Base-Band Processing postpones. For some terminal, Base-Band Processing delay is a fixed value.Specifically, can be calculated according to below equation, TX_Timing=Timing-Tadv-TX_HW_Delay, wherein, TX_Timing is final up transmission timing, Timing For the up timing according to descending timing and frame structure determination, TX_HW_Delay postpones for hardware handles.
Based on above-mentioned analysis, the technical scheme of the embodiment of the present invention is described in detail below.
As shown in figure 1, uplink synchronous method of adjustment includes following processing in TDD system according to embodiments of the present invention：
Step 101, when it is determined that needing to carry out uplink synchronous, previous cell information is stored in the first variable, and is sentenced The disconnected up transmitting lead Tadv that whether can directly obtain current area, if the judgment is Yes, step 102 is performed, otherwise, Perform step 103；
Step 102, directly obtain current area Tadv, according to the Tadv of current area calculate current area it is final on Row transmission timing, and current cell information storage is performed into step 104 into the second variable；
In a step 102, the Tadv for directly obtaining current area is specifically included：Channel FPACH is indicated according to quickly accessing The middle Tadv for obtaining current area.
Step 103, judge whether are the first variable and the second variable into the second variable directly by current cell information storage It is identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, if it is not the same, obtaining The descending timing difference of previous cell and current area is taken, and the Tadv of previous cell is adjusted according to descending timing difference, is obtained The Tadv of current area is taken, the final up transmission timing of current area is calculated according to the Tadv of current area, performs step 104；
In step 102 and step 103, the final up transmission timing for calculating current area specifically includes following processing：
The final up transmission timing of current area is calculated according to formula 1：
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is according to descending timing and frame structure The up timing determined, TX_HW_Delay postpone for hardware handles.
In step 103, the Tadv of previous cell is adjusted according to descending timing difference, obtains the Tadv of current area Specifically include following processing：
The Tadv of previous cell is adjusted according to formula 2, obtains the Tadv of current area；
TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
Wherein, OTD is descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
Step 104, the cell information in the second variable is updated into the first variable.
Below in conjunction with accompanying drawing, the above-mentioned technical proposal of the embodiment of the present invention is described in detail.
Fig. 2 be the embodiment of the present invention TD-SCDMA system in up-downgoing timing relationship schematic diagram, as shown in Fig. 2 false If the downlink reception link delay of terminal is Delta_T, because uplink downlink has identical link delay in TD-SCDMA, So terminal needs to shift to an earlier date Delta_T than the moment where the ascending time slot of NodeB sides, it can just make the upward signal that terminal is sent just Fall in NodeB ascending time slot.And the up timing of terminal is on the basis of descending timing, so terminal is needed under Shift to an earlier date 2 × Delta_T on the basis of the ascending time slot of row timing determination and send ascending time slot signal.It can be obtained according to foregoing description Go out, twice of relation between the up timing difference and descending timing difference of two minizones be present.The descending timing difference of two minizones is remembered For OTD, then the up timing of new cell is as follows：Tadv+=2 × OTD, i.e. TadvCurrent area=TadvPrevious cell+2*OTD。
Fig. 3 is that the terminal of the embodiment of the present invention carries out Tadv adjustment detail flowcharts under each scene, as shown in figure 3, tool Body includes following processing：
It is provided in an embodiment of the present invention be terminal initial link setup, reconfigure, baton handover, baton handover unsuccessfully retract, Direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retract when Tadv methods of adjustment, for terminal serving cell chain Road keeps the slow methods of adjustment of Tadv in stage, and the embodiment of the present invention is without considering.
In embodiments of the present invention, it is necessary to use two global variables：PreCellInfo and NewCellInfo, wherein, PreCellInfo preserves previous cell information, and NewCellInfo preserves current cell information.
When it is determined that needing to carry out uplink synchronous, judge whether directly obtain the Tadv of current area（Can be direct The scene for obtaining the Tadv of current area has initial link setup and direct-cut operation）；
If the Tadv of current area can be obtained directly, previous cell information is stored in global variable In PreCellInfo（Corresponding to the first above-mentioned variable）, Tadv is then calculated simultaneously according to the UPpos information carried in FPACH Renewal, the final up transmission of current area is then calculated according to formula TX_Timing=Timing-Tadv-TX_HW_Delay Regularly, and by current cell information storage NewCellInfo is arrived（Corresponding to above-mentioned second variable）In, finally, by cell information PreCellInfo, i.e. PreCellInfo=NewCellInfo are updated, in initial link setup next time, to reconfigure, relay Switching, baton handover unsuccessfully retracts, direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retract when use.
If the Tadv of current area can not be obtained directly, recording cell information NewCellInfo is only needed, and then Whether cell is identical before and after judgement, i.e. whether PreCellInfo and NewCellInfo is identical.If it is identical be expressed as it is same Cell, then the timing difference OTD of minizone is 0, according to formula TadvCurrent area=TadvPrevious cell+ 2*OTD, it may be determined that current area Tadv it is identical with the Tadv of previous cell, therefore, according to the Tadv of previous cell calculate current area final up hair Timing is sent, and the final up transmission of current area is calculated according to formula TX_Timing=Timing-Tadv-TX_HW_Delay Regularly；If presented as different districts, it is necessary to obtain the timing difference OTD of two cells, the relation fixed time according to up-downgoing and obtain The OTD values taken（That is, according to formula TadvCurrent area=TadvPrevious cell+2*OTD）, Tadv is calculated, finally according to formula TX_Timing =Timing-Tadv-TX_HW_Delay calculates the final up transmission timing of current area.Finally, cell information renewal is arrived PreCellInfo, i.e. PreCellInfo=NewCellInfo, in initial link setup next time, to reconfigure, baton handover, connect Used when power handoff failure rollback, direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retracts.
It should be noted that the embodiment of the present invention is illustrated by taking the TD-SCDMA system in TDD system as an example, its side Method principle is equally applicable to TD-LTE system.
In summary, the embodiment of the present invention has considered uplink synchronous method of adjustment of the terminal under various scenes, from And up sending performance is improved, the voice under the mobile environment of outfield is grown the Mean Speed protected and uploaded with downloading data It is significantly improved, greatly reduces the appearance of voice call drop and data cutout situation.And the embodiment of the present invention is adopted to each scene With unified Tadv methods of adjustment, optimize software and realize implementation process, be easy to transplant and safeguard.
Device embodiment
According to an embodiment of the invention, there is provided uplink synchronous adjusting apparatus in a kind of TDD system, Fig. 4 are of the invention real The structural representation of uplink synchronous adjusting apparatus in the TDD system of example is applied, it is necessary to which explanation, in embodiments of the present invention, is needed Carrying out the scene of uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover retract failure, direct-cut operation, firmly Handoff failure retracts and bimodulus handoff failure retracts；The scene for the Tadv that current area can be directly obtained includes：Just establish Chain and direct-cut operation；First variable and the second variable identical scene include：Reconfigure；First variable and the second variable are different Scene include：Baton handover, the failure of baton handover rollback, direct-cut operation unsuccessfully retracts and bimodulus handoff failure retracts.Below Analyzed respectively for above scene：
Specifically, identical due to reconfiguring front and rear cell when terminal is reconfigured, Tadv and TPU need not enter The fast adjustment of row, the slow adjustment before continuing to.
When terminal carries out baton handover, baton handover unsuccessfully retracts, direct-cut operation unsuccessfully retracts, bimodulus handoff failure retracts When, because front and rear cell difference, it is necessary to be adjusted soon to Tadv and TPU.Terminal can first carry out TPU adjust soon completion with newly it is small The descending Timing Synchronization in area, afterwards using the relation of up-downgoing timing in TDD system, Tadv is adjusted soon, so as to indirectly Carry out the up Timing Synchronization of new cell.
When terminal carries out initial link setup or direct-cut operation, terminal can carry out uplink synchronous process, directly be obtained just from net side The Tadv of beginning/new cell.Because when carrying out uplink synchronous process, terminal has obtained cell information, so as to it is above-mentioned Each scene be uniformly processed.
In a tdd system, the transmission timing of terminal is in addition to Tadv to be considered, it is also necessary to considers that Base-Band Processing postpones. For some terminal, Base-Band Processing delay is a fixed value.Specifically, can be calculated according to below equation, TX_Timing=Timing-Tadv-TX_HW_Delay, wherein, TX_Timing is final up transmission timing, Timing For the up timing according to descending timing and frame structure determination, TX_HW_Delay postpones for hardware handles.
Based on above-mentioned analysis, the technical scheme of the embodiment of the present invention is described in detail below.
As shown in figure 4, uplink synchronous adjusting apparatus includes in TDD system according to embodiments of the present invention：Storage judges mould Block 40, first stores computing module 42, second and stores computing module 44 and update module 46, below to the embodiment of the present invention Modules be described in detail.
Judge module 40 is stored, for when it is determined that needing to carry out uplink synchronous, previous cell information to be stored in into first In variable, and judge whether directly obtain the up transmitting lead Tadv of current area, if the judgment is Yes, call the One storage computing module 42, otherwise, call the second storage computing module 44；
First storage computing module 42, for directly obtaining the Tadv of current area, is calculated according to the Tadv of current area The final up transmission timing of current area, and current cell information storage is called into update module 46 into the second variable；
First storage computing module 42 can obtain current area according to quickly accessing Tadv in instruction channel FPACH.
Second storage computing module 44, directly by current cell information storage into the second variable, judge the first variable with Whether the second variable is identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, such as Fruit differs, and obtains the descending timing difference of previous cell and current area, and the Tadv according to descending timing difference to previous cell It is adjusted, obtains the Tadv of current area, the final up transmission timing of current area is calculated according to the Tadv of current area, Call update module 46；
First storage computing module 42 and second stores computing module 44 and is specifically used for：
The final up transmission timing of current area is calculated according to formula 1：
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is according to descending timing and frame structure The up timing determined, TX_HW_Delay postpone for hardware handles.
Second storage computing module 44 is specifically used for：
The Tadv of previous cell is adjusted according to formula 2, obtains the Tadv of current area；
TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
Wherein, OTD is descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
Update module 46, the cell information in the second variable is updated into the first variable.
Below in conjunction with accompanying drawing, the above-mentioned technical proposal of the embodiment of the present invention is described in detail.
Fig. 2 be the embodiment of the present invention TD-SCDMA system in up-downgoing timing relationship schematic diagram, as shown in Fig. 2 false If the downlink reception link delay of terminal is Delta_T, because uplink downlink has identical link delay in TD-SCDMA, So terminal needs to shift to an earlier date Delta_T than the moment where the ascending time slot of NodeB sides, it can just make the upward signal that terminal is sent just Fall in NodeB ascending time slot.And the up timing of terminal is on the basis of descending timing, so terminal is needed under Shift to an earlier date 2 × Delta_T on the basis of the ascending time slot of row timing determination and send ascending time slot signal.It can be obtained according to foregoing description Go out, twice of relation between the up timing difference and descending timing difference of two minizones be present.The descending timing difference of two minizones is remembered For OTD, then the up timing of new cell is as follows：Tadv+=2 × OTD, i.e. TadvCurrent area=TadvPrevious cell+2*OTD。
Fig. 3 is that the terminal of the embodiment of the present invention carries out Tadv adjustment detail flowcharts under each scene, as shown in figure 3, tool Body includes following processing：
It is provided in an embodiment of the present invention be terminal initial link setup, reconfigure, baton handover, baton handover unsuccessfully retract, Direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retract when Tadv methods of adjustment, for terminal serving cell chain Road keeps the slow methods of adjustment of Tadv in stage, and the embodiment of the present invention is without considering.
In embodiments of the present invention, it is necessary to use two global variables：PreCellInfo and NewCellInfo, wherein, PreCellInfo preserves previous cell information, and NewCellInfo preserves current cell information.
When it is determined that needing to carry out uplink synchronous, judge whether directly obtain the Tadv of current area（Can be direct The scene for obtaining the Tadv of current area has initial link setup and direct-cut operation）；
If the Tadv of current area can be obtained directly, previous cell information is stored in global variable In PreCellInfo（Corresponding to the first above-mentioned variable）, Tadv is then calculated simultaneously according to the UPpos information carried in FPACH Renewal, the final up transmission of current area is then calculated according to formula TX_Timing=Timing-Tadv-TX_HW_Delay Regularly, and by current cell information storage NewCellInfo is arrived（Corresponding to above-mentioned second variable）In, finally, by cell information PreCellInfo, i.e. PreCellInfo=NewCellInfo are updated, in initial link setup next time, to reconfigure, relay Switching, baton handover unsuccessfully retracts, direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retract when use.
If the Tadv of current area can not be obtained directly, recording cell information NewCellInfo is only needed, and then Whether cell is identical before and after judgement, i.e. whether PreCellInfo and NewCellInfo is identical.If it is identical be expressed as it is same Cell, then the timing difference OTD of minizone is 0, according to formula TadvCurrent area=TadvPrevious cell+ 2*OTD, it may be determined that current area Tadv it is identical with the Tadv of previous cell, therefore, according to the Tadv of previous cell calculate current area final up hair Timing is sent, and the final up transmission of current area is calculated according to formula TX_Timing=Timing-Tadv-TX_HW_Delay Regularly；If presented as different districts, it is necessary to obtain the timing difference OTD of two cells, the relation fixed time according to up-downgoing and obtain The OTD values taken（That is, according to formula TadvCurrent area=TadvPrevious cell+2*OTD）, Tadv is calculated, finally according to formula TX_Timing =Timing-Tadv-TX_HW_Delay calculates the final up transmission timing of current area.Finally, cell information renewal is arrived PreCellInfo, i.e. PreCellInfo=NewCellInfo, in initial link setup next time, to reconfigure, baton handover, connect Used when power handoff failure rollback, direct-cut operation, direct-cut operation unsuccessfully retract, bimodulus handoff failure retracts.
It should be noted that the embodiment of the present invention is illustrated by taking the TD-SCDMA system in TDD system as an example, its side Method principle is equally applicable to TD-LTE system.
In summary, the embodiment of the present invention has considered uplink synchronous method of adjustment of the terminal under various scenes, from And up sending performance is improved, the voice under the mobile environment of outfield is grown the Mean Speed protected and uploaded with downloading data It is significantly improved, greatly reduces the appearance of voice call drop and data cutout situation.And the embodiment of the present invention is adopted to each scene With unified Tadv methods of adjustment, optimize software and realize implementation process, be easy to transplant and safeguard.
Algorithm and display be not inherently related to any certain computer, virtual system or miscellaneous equipment provided herein. Various general-purpose systems can also be used together with teaching based on this.As described above, required by constructing this kind of system Structure be obvious.In addition, the present invention is not also directed to any certain programmed language.It should be understood that it can utilize various Programming language realizes the content of invention described herein, and the description done above to language-specific is to disclose this hair Bright preferred forms.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect, Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor The application claims of shield features more more than the feature being expressly recited in each claim.It is more precisely, such as following Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore, Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself Separate embodiments all as the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any Combination is to this specification（Including adjoint claim, summary and accompanying drawing）Disclosed in all features and so disclosed appoint Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification（Including adjoint power Profit requirement, summary and accompanying drawing）Disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments In included some features rather than further feature, but the combination of the feature of different embodiments means in of the invention Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed One of meaning mode can use in any combination.
The all parts embodiment of the present invention can be realized with hardware, or to be run on one or more processor Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that it can use in practice Microprocessor or digital signal processor（DSP）To realize, uplink synchronous adjusts in TDD system according to embodiments of the present invention The some or all functions of some or all parts in device.The present invention is also implemented as being used to perform being retouched here The some or all equipment or program of device for the method stated（For example, computer program and computer program product）. Such program for realizing the present invention can store on a computer-readable medium, or can have one or more signal Form.Such signal can be downloaded from internet website and obtained, either provide on carrier signal or with it is any its He provides form.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims, Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame Claim.

Claims (6)

  1. A kind of 1. uplink synchronous method of adjustment in TDD system, it is characterised in that including：
    Step 1, when it is determined that needing to carry out uplink synchronous, previous cell information is stored in the first variable, and is judged whether The up transmitting lead Tadv of current area can be directly obtained, if the judgment is Yes, performs step 2, otherwise, performs step 3；
    Step 2, the Tadv of the current area is directly obtained, the final of current area is calculated according to the Tadv of the current area Up transmission timing, and current cell information storage is performed into step 4 into the second variable；
    Step 3, judge that first variable and second variable are into the second variable directly by current cell information storage It is no identical, if identical, the final up transmission timing of current area is calculated according to the Tadv of previous cell, if it is not the same, Carry out descending Timing Synchronization and obtain the descending timing difference of previous cell and current area, and according to the descending timing difference to preceding The Tadv of one cell is adjusted, and obtains the Tadv of current area, and current area is calculated according to the Tadv of the current area Final up transmission timing, performs step 4；
    Step 4, the cell information in second variable is updated into first variable；
    The final up transmission timing for calculating current area specifically includes：
    The final up transmission timing of current area is calculated according to formula 1：
    TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
    Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is to be determined according to descending timing and frame structure Up timing, TX_HW_Delay be hardware handles delay；
    The Tadv of previous cell is adjusted according to the descending timing difference, the Tadv for obtaining current area is specifically included：
    The Tadv of previous cell is adjusted according to formula 2, obtains the Tadv of current area；
    TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
    Wherein, OTD is the descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
  2. 2. the method as described in claim 1, it is characterised in that
    The scene for needing to carry out uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover retract failure, cut Change, direct-cut operation unsuccessfully retracts and bimodulus handoff failure retracts；
    The scene for the Tadv that current area can be directly obtained includes：Initial link setup and direct-cut operation；
    First variable and the second variable identical scene include：Reconfigure；
    First variable scene different with second variable includes：Baton handover, the failure of baton handover rollback, direct-cut operation Failure retracts and bimodulus handoff failure retracts.
  3. 3. the method as described in claim 1, it is characterised in that the Tadv for directly obtaining the current area is specifically included：
    The Tadv of the UPpos acquisition of information current area carried according to quickly accessing in instruction channel FPACH.
  4. A kind of 4. uplink synchronous adjusting apparatus in TDD system, it is characterised in that including：
    Judge module is stored, for when it is determined that needing to carry out uplink synchronous, previous cell information to be stored in the first variable, And judge whether directly obtain the up transmitting lead Tadv of current area, if the judgment is Yes, call the first storage Computing module, otherwise, call the second storage computing module；
    First storage computing module, for directly obtaining the Tadv of the current area, is counted according to the Tadv of the current area The final up transmission timing of current area is calculated, and current cell information storage is called into update module into the second variable；
    Second storage computing module, directly judges first variable and institute by current cell information storage into the second variable Whether identical state the second variable, if identical, the final up transmission timing of current area calculated according to the Tadv of previous cell, If it is not the same, carry out descending Timing Synchronization and obtain the descending timing difference of previous cell and current area, and according under described Row timing difference is adjusted to the Tadv of previous cell, obtains the Tadv of current area, is counted according to the Tadv of the current area The final up transmission timing of current area is calculated, calls update module；
    Update module, the cell information in second variable is updated into first variable；
    The first storage computing module and the second storage computing module are specifically used for：
    The final up transmission timing of current area is calculated according to formula 1：
    TX_Timing=Timing-Tadv-TX_HW_Delay formula 1；
    Wherein, TX_Timing is the final up transmission timing of preceding cell, and Timing is to be determined according to descending timing and frame structure Up timing, TX_HW_Delay be hardware handles delay；
    The second storage computing module is specifically used for：
    The Tadv of previous cell is adjusted according to formula 2, obtains the Tadv of current area；
    TadvCurrent area=TadvPrevious cell+ 2*OTD formula 2；
    Wherein, OTD is the descending timing difference, TadvPrevious cellFor the Tadv of previous cell, TadvPrevious cellFor preceding cell Tadv。
  5. 5. device as claimed in claim 4, it is characterised in that
    The scene for needing to carry out uplink synchronous includes：Initial link setup, reconfigure, baton handover, baton handover retract failure, cut Change, direct-cut operation unsuccessfully retracts and bimodulus handoff failure retracts；
    The scene for the Tadv that current area can be directly obtained includes：Initial link setup and direct-cut operation；
    First variable and the second variable identical scene include：Reconfigure；
    First variable scene different with second variable includes：Baton handover, the failure of baton handover rollback, direct-cut operation Failure retracts and bimodulus handoff failure retracts.
  6. 6. device as claimed in claim 4, it is characterised in that the first storage computing module is specifically used for：According to quick The Tadv of the UPpos acquisition of information current area carried in Acquisition Indicator Channel FPACH.
CN201210379499.2A 2012-10-09 2012-10-09 Uplink synchronous method of adjustment and device in TDD system Active CN103716872B (en)

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CN201210379499.2A CN103716872B (en) 2012-10-09 2012-10-09 Uplink synchronous method of adjustment and device in TDD system
PCT/CN2013/083633 WO2014056388A1 (en) 2012-10-09 2013-09-17 Method and device for adjusting uplink synchronization in time division duplexing system
CN201380052749.4A CN104737601B (en) 2012-10-09 2013-09-17 Method and device for adjusting uplink synchronization in time division duplexing system
HK15109473.0A HK1208984A1 (en) 2012-10-09 2015-09-25 Method and device for adjusting uplink synchronization in time division duplexing system

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CN103716872B (en) * 2012-10-09 2017-11-10 中兴通讯股份有限公司 Uplink synchronous method of adjustment and device in TDD system
CN107438285B (en) * 2016-05-27 2020-01-17 普天信息技术有限公司 Uplink synchronization adjustment method and device
CN111049614B (en) * 2018-10-12 2021-08-10 中国移动通信有限公司研究院 Remote interference back-off method and base station

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CN100426704C (en) * 2002-06-06 2008-10-15 华为技术有限公司 Method for ralizing synchronization in TDD radio communication system
CN100534216C (en) * 2005-09-19 2009-08-26 上海原动力通信科技有限公司 Layering community mobile communication system switching method
CN101039154B (en) * 2006-03-15 2010-08-25 联芯科技有限公司 Method for obtaining transceiver channel transmission time of user terminal
CN101043256B (en) * 2006-03-23 2013-03-27 电信科学技术研究院 User access method for TDD mode
CN101494496B (en) * 2008-01-24 2012-11-28 中兴通讯股份有限公司 Method for holding ascending synchronization of customer equipment
CN101772093A (en) * 2008-12-31 2010-07-07 华为技术有限公司 User uplink and downlink out-of-step switching method and device
US20120258706A1 (en) * 2009-03-27 2012-10-11 Ling Yu Apparatus, Method and Article of Manufacture
CN101753202A (en) * 2010-01-07 2010-06-23 中兴通讯股份有限公司 Up synchronous method and terminal.
CN102469570B (en) * 2010-11-11 2014-11-26 大唐移动通信设备有限公司 Information notification and timing advance (TA) obtaining method, system and equipment thereof
CN102281626B (en) * 2011-07-06 2013-10-02 电信科学技术研究院 Method and device for determining uplink timing advance
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