CN103716872A - upper link synchronization adjusting method and device in TDD system - Google Patents
upper link synchronization adjusting method and device in TDD system Download PDFInfo
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- CN103716872A CN103716872A CN201210379499.2A CN201210379499A CN103716872A CN 103716872 A CN103716872 A CN 103716872A CN 201210379499 A CN201210379499 A CN 201210379499A CN 103716872 A CN103716872 A CN 103716872A
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Abstract
This invention discloses an upper link synchronization adjusting method and a device in a TDD system. The upper link synchronization adjusting method comprises: (1) storing previous cell information into a first variate and determining whether uplink transmitting advance (Tadv) of a current cell can be directly obtained or not, if yes, proceeding a step 2, if not, proceeding a step 3; (2) acquiring Tadv of the current cell, calculating the ultimate uplink transmitting timing of the current cell, storing the information of the current cell into a second variate and proceeding a step 4; (3) storing the information of the current cell into the second variate, determining whether the first variate and the second variate are identical or not, if yes, calculating the ultimate uplink transmitting timing of the current cell according to the Tad of the previous cell, if not, acquiring downlink timing difference, acquiring the Tadv of the current cell, and calculating the ultimate uplink transmitting timing of the current cell according to the Tadv and proceeding the step 4; and (4) updating the cell information in the second variate into the first variate.
Description
Technical field
The present invention relates to field of mobile communication, particularly relate to uplink synchronous method of adjustment and device in a kind of time division duplex (Time Division Duplexing, referred to as TDD) system.
Background technology
In TDD system, the scene that needs uplink synchronous adjustment that terminal may run into comprises: initial link setup, reshuffle, the scene such as baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback and bimodulus handoff failure rollback.In above-mentioned scene, except initial link setup and direct-cut operation can directly obtain up transmitting lead (Tadv) when carrying out uplink synchronous, other scenes all need indirectly to obtain by TPU.
Under external field environment, what affect up transmission performance mainly contains transmitting power and Tadv, and up transmission is the most responsive to Tadv.For example, when switching, need to Tadv, adjust soon according to descending timing, if Tadv adjusts mistake soon, thereby will be probably directly cause up transmission exit window handoff failure, and follow-uply cannot pass through slow adjustment and recovery, if also failure of rollback (as former cell signal a little less than), to directly cause voice call drop or data cutout, and have a strong impact on user and experience.
Summary of the invention
The invention provides uplink synchronous method of adjustment and device in a kind of TDD system, thereby to solve in prior art, the fast timing of Tadv is easily occurred to mistake affects the problem of up transmission performance.
The invention provides uplink synchronous method of adjustment in a kind of TDD system, comprise: step 1, determining while need to carry out uplink synchronous, last cell information is stored in the first variable, and judge whether directly to obtain the up transmitting lead Tadv of current area, and if the judgment is Yes, execution step 2, otherwise, execution step 3; Step 2, directly obtains the Tadv of current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable into execution step 4 according to the Tadv of current area; Step 3, directly current area information is stored in the second variable, judge that whether the first variable and the second variable be identical, if identical, according to the final up transmission of the Tadv calculating current area of last community regularly, if it is not identical, obtain the descending timing difference of last community and current area, and according to descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of current area, calculate the final up transmission timing of current area, execution step 4; Step 4, is updated to the cell information in the second variable in the first variable.
Preferably, the scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback; The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation; The scene that the first variable is identical with the second variable comprises: reshuffle; The first variable scene different with the second variable comprises: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.
Preferably, the Tadv that directly obtains current area specifically comprises: according to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
Preferably, final up the transmission regularly of calculating current area specifically comprises: the final up transmission timing of calculating current area according to formula 1:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
Preferably, according to descending timing difference, the Tadv of last community is adjusted, the Tadv that obtains current area specifically comprises: according to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
The present invention also provides uplink synchronous adjusting device in a kind of TDD system, comprise: storage judge module, for determining while need to carry out uplink synchronous, last 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, call the first storage computing module, otherwise, call the second storage computing module; The first storage computing module, for directly obtaining the Tadv of current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable according to the Tadv of current area, call update module; The second storage computing module, directly current area information is stored in the second variable, judge that whether the first variable and the second variable be identical, if identical, according to the Tadv of last community, calculate the final up transmission timing of current area, if it is not identical, obtain the descending timing difference of last community and current area, and according to descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of current area, calculate the final up transmission timing of current area, call update module; Update module, is updated to the cell information in the second variable in the first variable.
Preferably, the scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback; The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation; The scene that the first variable is identical with the second variable comprises: reshuffle; The first variable scene different with the second variable comprises: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.
Preferably, first storage computing module specifically for: according to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
Preferably, the first storage computing module and the second storage computing module are specifically for final up the transmissions timing of calculating current area according to formula 1:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
Preferably, second storage computing module specifically for: according to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
Beneficial effect of the present invention is as follows:
By in TDD system, under various scenes, to terminal, the Tadv for uplink synchronous unifies to adjust, solved in prior art the fast timing of Tadv has easily been occurred to thereby mistake affects the problem of up transmission performance, can improve up transmission performance, especially make that voice under the mobile environment of outfield are long to be protected and the Mean Speed of upload and download data is significantly improved, greatly reduced the appearance of voice call drop and data cutout situation.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, by identical reference symbol, represent identical parts.In the accompanying drawings:
Fig. 1 is the flow chart of uplink synchronous method of adjustment in the TDD system of the embodiment of the present invention;
Fig. 2 is the schematic diagram of up-downgoing timing relationship in the TD-SCDMA system of the embodiment of the present invention;
Fig. 3 is that the terminal of the embodiment of the present invention is carried out Tadv adjustment detail flowchart under each scene;
Fig. 4 is the structural representation of uplink synchronous adjusting device in the TDD system of the embodiment of the present invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, yet should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can by the scope of the present disclosure complete convey to those skilled in the art.
In order to solve in prior art, the fast timing of Tadv is easily occurred to thereby mistake affects the problem of up transmission performance, the invention provides uplink synchronous method of adjustment and device in a kind of TDD system, in embodiments of the present invention, considered when terminal reshuffling, baton handover, baton handover failure rollback, direct-cut operation failure rollback, bimodulus handoff failure rollback etc. cannot directly obtain under the scene of Tadv, according to TPU, indirectly carry out the method for Tadv adjustment.While considering initial link setup and direct-cut operation, directly obtain the scene of Tadv simultaneously, and modularization and the portability of software realization, a kind of unified Tadv method of adjustment that is applicable to above-mentioned each scene has been proposed.Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit the present invention.
Embodiment of the method
According to embodiments of the invention, uplink synchronous method of adjustment in a kind of TDD system is provided, Fig. 1 is the flow chart of uplink synchronous method of adjustment in the TDD system of the embodiment of the present invention, it should be noted that, in embodiments of the present invention, the scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback; The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation; The scene that the first variable is identical with the second variable comprises: reshuffle; The first variable scene different with the second variable comprises: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.For above scene, analyze respectively below:
Particularly, when terminal is reshuffled, because community before and after reshuffling is identical, Tadv and TPU do not need to adjust soon, the slow adjustment before still continuing.
When terminal is carried out baton handover, baton handover failure rollback, direct-cut operation failure rollback, bimodulus handoff failure rollback, because community, front and back is different, need to adjust soon Tadv and TPU.Terminal can first be carried out the descending Timing Synchronization that TPU has adjusted soon Yu Xin community, utilizes afterwards the relation of up-downgoing timing in TDD system, Tadv is adjusted soon, thereby indirectly carry out the up Timing Synchronization of new community.
When terminal is carried out initial link setup or direct-cut operation, terminal can be carried out uplink synchronous process, directly from net side, obtains the Tadv of initial/new community.Due to when carrying out uplink synchronous process, terminal has obtained cell information, thereby can the unified processing with each above-mentioned scene.
In TDD system, the transmission of terminal regularly, except will considering Tadv, also needs to consider that Base-Band Processing postpones.For some terminals, it is a fixed value that Base-Band Processing postpones.Particularly, can calculate according to following formula TX_Timing=Timing-Tadv-TX_HW_Delay, wherein, TX_Timing is final up transmission timing, and Timing is according to descending timing and the definite up timing of frame structure, and TX_HW_Delay is that hardware handles postpones.
Based on above-mentioned analysis, below the technical scheme of the embodiment of the present invention is elaborated.
As shown in Figure 1, according to uplink synchronous method of adjustment in the TDD system of the embodiment of the present invention, comprise following processing:
Step 101, determining while need to carry out uplink synchronous, is stored in last cell information in the first variable, and judges whether directly to obtain the up transmitting lead Tadv of current area, if the judgment is Yes, and execution step 102, otherwise, execution step 103;
Step 102, directly obtains the Tadv of current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable into execution step 104 according to the Tadv of current area;
In step 102, the Tadv that directly obtains current area specifically comprises: according to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
Step 103, directly current area information is stored in the second variable, judge that whether the first variable and the second variable be identical, if identical, according to the Tadv of last community, calculate the final up transmission timing of current area, if it is not identical, obtain the descending timing difference of last community and current area, and according to descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of current area, calculate the final up transmission timing of current area, execution step 104;
In step 102 and step 103, the final up transmission of calculating current area regularly specifically comprises following processing:
According to formula 1, calculate the final up transmission timing of current area:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
In step 103, according to descending timing difference, the Tadv of last community is adjusted, the Tadv that obtains current area specifically comprises following processing:
According to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
Step 104, is updated to the cell information in the second variable in the first variable.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the present invention is described in detail.
Fig. 2 is the schematic diagram of up-downgoing timing relationship in the TD-SCDMA system of the embodiment of the present invention, as shown in Figure 2, the descending receiver of supposing terminal postpones for Delta_T, because uplink downlink in TD-SCDMA has identical link delay, so terminal need to shift to an earlier date Delta_T constantly than NodeB side ascending time slot place, the upward signal that just can make terminal send just in time drops in the ascending time slot of NodeB.And the up timing of terminal is to take descending timing as benchmark, so need to shifting to an earlier date 2 * Delta_T on the ascending time slot basis definite according to descending timing, terminal sends ascending time slot signal.According to foregoing description, can draw, between the up timing difference of two minizones and descending timing difference, have twice relation.The descending timing difference of two minizones is designated as to OTD, and the up timing of Ze Xin community is as follows: Tadv+=2 * OTD, i.e. Tadv
current area=Tadv
previous community+ 2*OTD.
Fig. 3 is that the terminal of the embodiment of the present invention is carried out Tadv adjustment detail flowchart under each scene, as shown in Figure 3, specifically comprises following processing:
The embodiment of the present invention provide terminal at initial link setup, reshuffle, Tadv method of adjustment when baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, bimodulus handoff failure rollback, for terminal, at the link of Serving cell, keep the slow method of adjustment of Tadv in stage, the embodiment of the present invention is not considered.
In embodiments of the present invention, need to use two global variable: PreCellInfo and NewCellInfo, wherein, PreCellInfo preserves last cell information, and NewCellInfo preserves current area information.
Determining while need to carry out uplink synchronous, the scene that the Tadv(that judges whether directly to obtain current area can directly obtain the Tadv of current area has initial link setup and direct-cut operation);
If can directly obtain the Tadv of current area, last cell information is stored in to (corresponding to the first above-mentioned variable) in global variable PreCellInfo, then according to the UPpos information of carrying in FPACH, calculate Tadv and upgrade, according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate subsequently the final up transmission timing of current area, and store current area information into NewCellInfo(corresponding to above-mentioned the second variable) in, finally, cell information is updated to PreCellInfo, be PreCellInfo=NewCellInfo, so that at upper once initial link setup, reshuffle, baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, during bimodulus handoff failure rollback, use.
If can not directly obtain the Tadv of current area, only need recording cell information NewCellInfo, and then whether community, judgement front and back is identical, whether PreCellInfo is identical with NewCellInfo.If identical table is shown same community, the timing difference OTD of minizone is 0, according to formula Tadv
current area=Tadv
previous community+ 2*OTD, can determine that the Tadv of current area is identical with the Tadv of previous community, therefore, according to the Tadv of last community, calculate the final up transmission timing of current area, and according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate the final up transmission timing of current area; If be expressed as different districts, need to obtain the timing difference OTD of two communities, the relation of fixing time according to up-downgoing and the OTD value obtained are (that is, according to formula Tadv
current area=Tadv
previous community+ 2*OTD), calculate Tadv, finally according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate the final up transmission timing of current area.Finally, cell information is updated to PreCellInfo, be PreCellInfo=NewCellInfo, so as at upper once initial link setup, reshuffle, use when baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, bimodulus handoff failure rollback.
It should be noted that, to be the TD-SCDMA system of take in TDD system describe as example the embodiment of the present invention, and its Method And Principle is equally applicable to TD-LTE system.
In sum, the embodiment of the present invention has considered the uplink synchronous method of adjustment of terminal under various scenes, thereby improved up transmission performance, especially make that voice under the mobile environment of outfield are long to be protected and the Mean Speed of upload and download data is significantly improved, greatly reduce the appearance of voice call drop and data cutout situation.And the embodiment of the present invention adopts unified Tadv method of adjustment to each scene, optimize software and realized realization flow, be convenient to transplant and safeguard.
Device embodiment
According to embodiments of the invention, uplink synchronous adjusting device in a kind of TDD system is provided, Fig. 4 is the structural representation of uplink synchronous adjusting device in the TDD system of the embodiment of the present invention, it should be noted that, in embodiments of the present invention, the scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback; The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation; The scene that the first variable is identical with the second variable comprises: reshuffle; The first variable scene different with the second variable comprises: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.For above scene, analyze respectively below:
Particularly, when terminal is reshuffled, because community before and after reshuffling is identical, Tadv and TPU do not need to adjust soon, the slow adjustment before still continuing.
When terminal is carried out baton handover, baton handover failure rollback, direct-cut operation failure rollback, bimodulus handoff failure rollback, because community, front and back is different, need to adjust soon Tadv and TPU.Terminal can first be carried out the descending Timing Synchronization that TPU has adjusted soon Yu Xin community, utilizes afterwards the relation of up-downgoing timing in TDD system, Tadv is adjusted soon, thereby indirectly carry out the up Timing Synchronization of new community.
When terminal is carried out initial link setup or direct-cut operation, terminal can be carried out uplink synchronous process, directly from net side, obtains the Tadv of initial/new community.Due to when carrying out uplink synchronous process, terminal has obtained cell information, thereby can the unified processing with each above-mentioned scene.
In TDD system, the transmission of terminal regularly, except will considering Tadv, also needs to consider that Base-Band Processing postpones.For some terminals, it is a fixed value that Base-Band Processing postpones.Particularly, can calculate according to following formula TX_Timing=Timing-Tadv-TX_HW_Delay, wherein, TX_Timing is final up transmission timing, and Timing is according to descending timing and the definite up timing of frame structure, and TX_HW_Delay is that hardware handles postpones.
Based on above-mentioned analysis, below the technical scheme of the embodiment of the present invention is elaborated.
As shown in Figure 4, according to uplink synchronous adjusting device in the TDD system of the embodiment of the present invention, comprise: storage judge module 40, the first storage computing module 42, the second storage computing module 44 and update module 46, below be described in detail the modules of the embodiment of the present invention.
The first storage computing module 42, for directly obtaining the Tadv of current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable according to the Tadv of current area, call update module 46;
The first storage computing module 42 can be according to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
The second storage computing module 44, directly current area information is stored in the second variable, judge that whether the first variable and the second variable be identical, if identical, according to the Tadv of last community, calculate the final up transmission timing of current area, if it is not identical, obtain the descending timing difference of last community and current area, and according to descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of current area, calculate the final up transmission timing of current area, call update module 46;
First storage computing module 42 and second storage computing module 44 specifically for:
According to formula 1, calculate the final up transmission timing of current area:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
Second storage computing module 44 specifically for:
According to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the present invention is described in detail.
Fig. 2 is the schematic diagram of up-downgoing timing relationship in the TD-SCDMA system of the embodiment of the present invention, as shown in Figure 2, the descending receiver of supposing terminal postpones for Delta_T, because uplink downlink in TD-SCDMA has identical link delay, so terminal need to shift to an earlier date Delta_T constantly than NodeB side ascending time slot place, the upward signal that just can make terminal send just in time drops in the ascending time slot of NodeB.And the up timing of terminal is to take descending timing as benchmark, so need to shifting to an earlier date 2 * Delta_T on the ascending time slot basis definite according to descending timing, terminal sends ascending time slot signal.According to foregoing description, can draw, between the up timing difference of two minizones and descending timing difference, have twice relation.The descending timing difference of two minizones is designated as to OTD, and the up timing of Ze Xin community is as follows: Tadv+=2 * OTD, i.e. Tadv
current area=Tadv
previous community+ 2*OTD.
Fig. 3 is that the terminal of the embodiment of the present invention is carried out Tadv adjustment detail flowchart under each scene, as shown in Figure 3, specifically comprises following processing:
The embodiment of the present invention provide terminal at initial link setup, reshuffle, Tadv method of adjustment when baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, bimodulus handoff failure rollback, for terminal, at the link of Serving cell, keep the slow method of adjustment of Tadv in stage, the embodiment of the present invention is not considered.
In embodiments of the present invention, need to use two global variable: PreCellInfo and NewCellInfo, wherein, PreCellInfo preserves last cell information, and NewCellInfo preserves current area information.
Determining while need to carry out uplink synchronous, the scene that the Tadv(that judges whether directly to obtain current area can directly obtain the Tadv of current area has initial link setup and direct-cut operation);
If can directly obtain the Tadv of current area, last cell information is stored in to (corresponding to the first above-mentioned variable) in global variable PreCellInfo, then according to the UPpos information of carrying in FPACH, calculate Tadv and upgrade, according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate subsequently the final up transmission timing of current area, and store current area information into NewCellInfo(corresponding to above-mentioned the second variable) in, finally, cell information is updated to PreCellInfo, be PreCellInfo=NewCellInfo, so that at upper once initial link setup, reshuffle, baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, during bimodulus handoff failure rollback, use.
If can not directly obtain the Tadv of current area, only need recording cell information NewCellInfo, and then whether community, judgement front and back is identical, whether PreCellInfo is identical with NewCellInfo.If identical table is shown same community, the timing difference OTD of minizone is 0, according to formula Tadv
current area=Tadv
previous community+ 2*OTD, can determine that the Tadv of current area is identical with the Tadv of previous community, therefore, according to the Tadv of last community, calculate the final up transmission timing of current area, and according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate the final up transmission timing of current area; If be expressed as different districts, need to obtain the timing difference OTD of two communities, the relation of fixing time according to up-downgoing and the OTD value obtained are (that is, according to formula Tadv
current area=Tadv
previous community+ 2*OTD), calculate Tadv, finally according to formula TX_Timing=Timing-Tadv-TX_HW_Delay, calculate the final up transmission timing of current area.Finally, cell information is updated to PreCellInfo, be PreCellInfo=NewCellInfo, so as at upper once initial link setup, reshuffle, use when baton handover, baton handover failure rollback, direct-cut operation, direct-cut operation failure rollback, bimodulus handoff failure rollback.
It should be noted that, to be the TD-SCDMA system of take in TDD system describe as example the embodiment of the present invention, and its Method And Principle is equally applicable to TD-LTE system.
In sum, the embodiment of the present invention has considered the uplink synchronous method of adjustment of terminal under various scenes, thereby improved up transmission performance, especially make that voice under the mobile environment of outfield are long to be protected and the Mean Speed of upload and download data is significantly improved, greatly reduce the appearance of voice call drop and data cutout situation.And the embodiment of the present invention adopts unified Tadv method of adjustment to each scene, optimize software and realized realization flow, be convenient to transplant and safeguard.
The algorithm providing at this is intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with demonstration.Various general-purpose systems also can with based on using together with this teaching.According to description above, it is apparent constructing the desired structure of this type systematic.In addition, the present invention is not also for any certain programmed language.It should be understood that and can utilize various programming languages to realize content of the present invention described here, and the description of above language-specific being done is in order to disclose preferred forms of the present invention.
In the specification that provided herein, a large amount of details have been described.Yet, can understand, embodiments of the invention can not put into practice in the situation that there is no these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand one or more in each inventive aspect, in the above in the description of exemplary embodiment of the present invention, each feature of the present invention is grouped together into single embodiment, figure or sometimes in its description.Yet, the method for the disclosure should be construed to the following intention of reflection: the present invention for required protection requires than the more feature of feature of clearly recording in each claim.Or rather, as reflected in claims below, inventive aspect is to be less than all features of disclosed single embodiment above.Therefore, claims of following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and can the module in the equipment in embodiment are adaptively changed and they are arranged in one or more equipment different from this embodiment.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and can put them into a plurality of submodules or subelement or sub-component in addition.At least some in such feature and/or process or unit are mutually repelling, and can adopt any combination to combine all processes or the unit of disclosed all features in this specification (comprising claim, summary and the accompanying drawing followed) and disclosed any method like this or equipment.Unless clearly statement in addition, in this specification (comprising claim, summary and the accompanying drawing followed) disclosed each feature can be by providing identical, be equal to or the alternative features of similar object replaces.
In addition, those skilled in the art can understand, although embodiment more described herein comprise some feature rather than further feature included in other embodiment, the combination of the feature of different embodiment means within scope of the present invention and forms different embodiment.For example, in the following claims, the one of any of embodiment required for protection can be used with compound mode arbitrarily.
All parts embodiment of the present invention can realize with hardware, or realizes with the software module moved on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that and can use in practice microprocessor or digital signal processor (DSP) to realize according to the some or all functions of the some or all parts in uplink synchronous adjusting device in the TDD system of the embodiment of the present invention.The present invention for example can also be embodied as, for carrying out part or all equipment or device program (, computer program and computer program) of method as described herein.Realizing program of the present invention and can be stored on computer-readable medium like this, or can there is the form of one or more signal.Such signal can be downloaded and obtain from internet website, or provides on carrier signal, or provides with any other form.
It should be noted above-described embodiment the present invention will be described rather than limit the invention, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has a plurality of such elements.The present invention can be by means of including the hardware of some different elements and realizing by means of the computer of suitably programming.In having enumerated the unit claim of some devices, several in these devices can be to carry out imbody by same hardware branch.The use of word first, second and C grade does not represent any order.Can be title by these word explanations.
Claims (10)
1. a uplink synchronous method of adjustment in TDD system, is characterized in that, comprising:
Step 1, determining while need to carry out uplink synchronous, is stored in last cell information in the first variable, and judges whether directly to obtain the up transmitting lead Tadv of current area, if the judgment is Yes, and execution step 2, otherwise, execution step 3;
Step 2, directly obtains the Tadv of described current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable into execution step 4 according to the Tadv of described current area;
Step 3, directly current area information is stored in the second variable, judge that whether described the first variable is identical with described the second variable, if identical, according to the Tadv of last community, calculate the final up transmission timing of current area, if it is not identical, obtain the descending timing difference of last community and current area, and according to described descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of described current area, calculate the final up transmission timing of current area, execution step 4;
Step 4, is updated to the cell information in described the second variable in described the first variable.
2. the method for claim 1, is characterized in that,
The scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback;
The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation;
Described the first variable comprises with the identical scene of described the second variable: reshuffle;
Described the first variable comprises with the different scene of described the second variable: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.
3. the method for claim 1, is characterized in that, the Tadv that directly obtains described current area specifically comprises:
According to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
4. the method for claim 1, is characterized in that, the final up transmission of calculating current area regularly specifically comprises:
According to formula 1, calculate the final up transmission timing of current area:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
5. the method for claim 1, is characterized in that, according to described descending timing difference, the Tadv of last community is adjusted, and the Tadv that obtains current area specifically comprises:
According to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is described descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
6. a uplink synchronous adjusting device in TDD system, is characterized in that, comprising:
Storage judge module, for determining while need to carry out uplink synchronous, last 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, call the first storage computing module, otherwise, the second storage computing module called;
The first storage computing module, for directly obtaining the Tadv of described current area, calculates the final up transmission timing of current area, and current area information is stored in the second variable according to the Tadv of described current area, call update module;
The second storage computing module, directly current area information is stored in the second variable, judge that whether described the first variable is identical with described the second variable, if identical, according to the Tadv of last community, calculate the final up transmission timing of current area, if it is not identical, obtain the descending timing difference of last community and current area, and according to described descending timing difference, the Tadv of last community is adjusted, obtain the Tadv of current area, according to the Tadv of described current area, calculate the final up transmission timing of current area, call update module;
Update module, is updated to the cell information in described the second variable in described the first variable.
7. device as claimed in claim 6, is characterized in that,
The scene that need to carry out uplink synchronous comprises: initial link setup, reshuffle, baton handover, the failure of baton handover rollback, direct-cut operation, the failed rollback of direct-cut operation and bimodulus handoff failure rollback;
The scene that can directly obtain the Tadv of current area comprises: initial link setup and direct-cut operation;
Described the first variable comprises with the identical scene of described the second variable: reshuffle;
Described the first variable comprises with the different scene of described the second variable: baton handover, the failure of baton handover rollback, the failed rollback of direct-cut operation and bimodulus handoff failure rollback.
8. device as claimed in claim 6, is characterized in that, described first storage computing module specifically for: according to obtaining the Tadv of current area in quick Acquisition Indicator Channel FPACH.
9. device as claimed in claim 6, is characterized in that, described first storage computing module and described second storage computing module specifically for:
According to formula 1, calculate the final up transmission timing of current area:
TX_Timing=Timing-Tadv-TX_HW_Delay formula 1;
Wherein, regularly, Timing is according to descending timing and the definite up timing of frame structure in the final up transmission of TX_Timing Wei Qian community, and TX_HW_Delay is that hardware handles postpones.
10. device as claimed in claim 6, is characterized in that, described second storage computing module specifically for:
According to the Tadv of 2 pairs of last communities of formula, adjust, obtain the Tadv of current area;
Tadv
current area=Tadv
previous community+ 2*OTD formula 2;
Wherein, OTD is described descending timing difference, Tadv
previous communityfor the Tadv of last community, Tadv
previous communitythe Tadv of Wei Qian community.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210379499.2A CN103716872B (en) | 2012-10-09 | 2012-10-09 | Uplink synchronous method of adjustment and device in TDD system |
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| Publication Number | Publication Date |
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| CN103716872A true CN103716872A (en) | 2014-04-09 |
| CN103716872B CN103716872B (en) | 2017-11-10 |
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| CN201210379499.2A Active CN103716872B (en) | 2012-10-09 | 2012-10-09 | Uplink synchronous method of adjustment and device in TDD system |
| CN201380052749.4A Active CN104737601B (en) | 2012-10-09 | 2013-09-17 | Method and device for adjusting uplink synchronization in time division duplexing system |
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| CN201380052749.4A Active CN104737601B (en) | 2012-10-09 | 2013-09-17 | Method and device for adjusting uplink synchronization in time division duplexing system |
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| Country | Link |
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| CN (2) | CN103716872B (en) |
| HK (1) | HK1208984A1 (en) |
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| CN104737601B (en) * | 2012-10-09 | 2017-05-03 | 中兴通讯股份有限公司 | Method and device for adjusting uplink synchronization in time division duplexing system |
| CN107438285A (en) * | 2016-05-27 | 2017-12-05 | 普天信息技术有限公司 | A kind of uplink synchronous method of adjustment and device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103716872B (en) | 2017-11-10 |
| WO2014056388A1 (en) | 2014-04-17 |
| CN104737601B (en) | 2017-05-03 |
| CN104737601A (en) | 2015-06-24 |
| HK1208984A1 (en) | 2016-03-18 |
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