CN103476103A - Method and device for uplink transmission time adjustment - Google Patents
Method and device for uplink transmission time adjustment Download PDFInfo
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- CN103476103A CN103476103A CN2012101859795A CN201210185979A CN103476103A CN 103476103 A CN103476103 A CN 103476103A CN 2012101859795 A CN2012101859795 A CN 2012101859795A CN 201210185979 A CN201210185979 A CN 201210185979A CN 103476103 A CN103476103 A CN 103476103A
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Abstract
The invention discloses a method and a device for uplink transmission time adjustment. The method comprises the steps of adjusting an uplink Tadv, sending an uplink SB to a base station according to the adjusted uplink Tadv and adjusting the uplink transmission time according to a downlink SB sent by the base station. According to the method, the uplink Tadv is adjusted first, then the uplink SB is sent to the base station according to the adjusted uplink Tadv, and finally, the uplink transmission time is adjusted according to the downlink SB sent by the base station. The problem that the cell switching effect is influenced due to low accuracy of the uplink Tadv in the related technology is solved, the reliability of uplink Tadv setting is improved, and the success rate of cell relay switching is improved.
Description
Technical field
The present invention relates to the communications field, in particular to method of adjustment and the device of a kind of up launch time.
Background technology
At TD SDMA access (Time Division-Synchronous Code Division Multiple Access, referred to as TD-SCDMA) in system, when during travelling carriage is being conversed, the Cong Yige community enters another community, calling is transformed into one other channel from a wireless channel in its process, switches.Switching in the TD-SCDMA system is divided into direct-cut operation and two kinds of modes of baton handover.
Direct-cut operation refers to,, first interrupts and the communicating by letter of former base station to another community or during sector when user Cong Yige community or sector switch, and then changes carrier frequency Yu Xin community and set up and communicate by letter.Baton handover refers to, when user Cong Yige community or sector switch to another community or during sector, utilize the technology such as smart antenna and uplink synchronous to position the distance and bearing of terminal, the supplementary according to the azimuth-range information of terminal as switching.If terminal enters switch area, radio network controller (Radio Network Controller, referred to as RNC) notifies another base station to carry out the switching preparation, thereby reaches fast, the reliably and efficiently purpose of switching.
Baton handover utilizes the up presynchronization technology of terminal, obtains in advance the synchronization parameter with Target cell, and keeps and the synchronizeing of Target cell by open loop approach, once network judgement switching, terminal You Yuan community rapidly is switched to Target cell.
In the situation that base station is strict synchronous, the down-going synchronous deviation OTD(Observed Time Difference of synchronous and Target cell that can be by former community, observed time difference) calculate the uplink synchronous time of Target cell, then utilize down-going synchronous to determine uplink synchronous, just can carry out presynchronization by the method for open loop.
The basic principle that uplink synchronous keeps is, subscriber equipment (User Equipment, referred to as UE) is mobile, and it is to the distance of base station (Node B) always in variation.So in whole communication process, Node B must detect the due in of Midamble code in its uplink frame incessantly, and the x time of UE is carried out to closed-loop control, to keep synchronous reliably.Node B can estimate at same time slot skew launch time of UE by the midamble code of measuring each UE, then launch simultaneous bias (Synchronization Shift at the next one in available descending time slot, referred to as SS) order, so that UE can suitably adjust its Tx launch time according to order, thereby guaranteed the stability of uplink synchronous.The adjustment step-length of uplink synchronous is configurable and setting again, and span is 1/8～1chip.The renewal of uplink synchronous has three kinds of possibility situations: increase a step-length, reduce by a step-length or constant.
Fig. 1 is the flow chart according to the community baton handover of the uplink synchronous of correlation technique, and as shown in Figure 1, this flow process comprises the following steps (step S102-step S114):
Step S102, the RSCP intensity on the P-CCPCH of terminal measurement adjacent area and the OTD of adjacent area.Wherein, the measurement of OTD realizes by the SYNC-DL data segment.The TD-SCDMA system has basic down-going synchronous (the synchronous downlink that 32 groups of length are 64, SYNC-DL) code, a base station of the unique sign of SYNC-DL and a code character, each code character comprises 4 specific scramblers, the corresponding specific Basic Midamble code of each scrambler.
Step S104, terminal is switched to Target cell according to the control of network side, converts the initial timing value be switched to after Target cell according to the timing position of former community and above-mentioned OTD.
Step S106, the initial uplink Tadv(emission time initial lead of converting Target cell according to above-mentioned OTD measured value).
Step S108, terminal receives the SYNC-DL data on Target cell, carries out down-going synchronous, adjusts accordingly the descending timing of terminal.
Step S110, terminal, according to the above-mentioned up Tadv converted out, sends up SB(special burst, special burst) signal.
Step S112, base station receives up SB, and, according to the upward signal received, sends descending SB.Wherein, this descending SB comprises the SS order of adjusting up launch time.
Step S114, terminal, according to the SS order in the descending SB received, is adjusted up launch time to rational position.
Can be known according to above step, up Tadv really fixes exactness and has determined that to a great extent can switching flow complete smoothly, and the accuracy of Tadv depends on the accuracy that OTD measures.
From theory analysis and actual field testing, under weak signal or same frequently more intense communication scenes, the OTD measurement has certain error, and this error also may be larger.While with SYNC-DL, realizing down-going synchronous, down-going synchronous window larger [32,96] chip, so downlink error has surpassed this scope so long as not too large, descendingly can adjust to correct position over time.And up synchronous adjustment, NodeB determines according to the peak of the Midamble code received the SS command context that issues, and the receiver window of Midamble code only has 16chip, up receiver window is smaller, if up launch time, the Tx deviation ratio was larger, thereby causes the words of uplink receiving signal exit window, NodeB will can not receive up Midamble code, the corresponding descending correct SS order that also will can not receive, up Tadv can't adjust, and finally cause switching flow unsuccessfully.
Accuracy for up Tadv in correlation technique is lower, thereby affects the problem of community switching effect, not yet proposes at present effective solution.
Summary of the invention
Accuracy for up Tadv in correlation technique is lower, thereby affects the problem of community switching effect, the invention provides method of adjustment and the device of a kind of up launch time, at least to address the above problem.
According to an aspect of the present invention, provide the method for adjustment of a kind of up launch time, the method comprises: up Tadv is adjusted; Send up SB to base station according to the up Tadv after adjusting; The descending SB sent according to base station adjusts up launch time.
Up Tadv is adjusted and can comprise: whether be stabilized in predeterminated position according to the down-going synchronous position, up Tadv is adjusted.
Up Tadv is adjusted and can comprise: according to downlink cycle redundant check code, whether CRC is correct, and up Tadv is adjusted.
Whether be stabilized in above-mentioned predeterminated position according to above-mentioned down-going synchronous position, up Tadv is adjusted and can comprise: detect above-mentioned down-going synchronous position and whether be stabilized in predeterminated position; When above-mentioned down-going synchronous position stability being detected at above-mentioned predeterminated position, obtain current timing value, according to above-mentioned current timing value, up Tadv is adjusted.
Detect before whether above-mentioned down-going synchronous position be stabilized in predeterminated position, said method can also comprise: obtain the SYNC-DL data segment; Determine above-mentioned down-going synchronous position according to above-mentioned SYNC-DL data segment.
Whether correct according to above-mentioned descending CRC, up Tadv is adjusted and can comprise: whether correctly detect descending CRC; When above-mentioned descending CRC being detected when correct, obtain current timing value, according to timing value before deserving, up Tadv is adjusted.
According to a further aspect in the invention, provide the adjusting device of a kind of up launch time, this device comprises: the first adjusting module, for up Tadv is adjusted; Sending module, send up SB for the up Tadv according to after above-mentioned the first adjusting module adjustment to base station; The second adjusting module, adjust up launch time for the descending SB sent according to base station.
Above-mentioned the first adjusting module can comprise: the first adjustment unit, for according to the down-going synchronous position, whether being stabilized in predeterminated position, up Tadv is adjusted.
Above-mentioned the first adjusting module can comprise: the second adjustment unit, for whether correct according to downlink cycle redundant check code CRC, above-mentioned up Tadv is adjusted.
Above-mentioned the first adjustment unit can comprise: whether the first detection sub-unit is stabilized in above-mentioned predeterminated position for detection of above-mentioned down-going synchronous position; First adjusts subelement, for when above-mentioned the first detection sub-unit detects above-mentioned down-going synchronous position stability at above-mentioned predeterminated position, obtains current timing value, according to above-mentioned current timing value, up Tadv is adjusted.
Above-mentioned the first adjustment unit can also comprise: obtain subelement, for obtaining the SYNC-DL data segment; Determine subelement, for according to above-mentioned, obtain the above-mentioned SYNC-DL data segment that subelement obtains and determine above-mentioned down-going synchronous position.
Above-mentioned the second adjustment unit comprises: whether the second detection sub-unit is correct for detection of descending CRC; Second adjusts subelement, for above-mentioned descending CRC being detected when above-mentioned the second detection sub-unit when correct, obtains current timing value, according to above-mentioned current timing value, up Tadv is adjusted.
By the present invention, first up Tadv is adjusted, then send up SB to base station according to the up Tadv after adjusting, the descending SB sent according to base station again adjusts up launch time, solved in the correlation technique accuracy of up Tadv lower, thereby affect the problem of community switching effect, thereby improved the reliability that up Tadv arranges, improved the success rate of community baton handover.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the flow chart according to the community baton handover of the uplink synchronous of correlation technique;
Fig. 2 is the flow chart according to the method for adjustment of the up launch time of the embodiment of the present invention;
Fig. 3 is the flow chart according to adjustment up launch time of the embodiment of the present invention;
Fig. 4 be according to the embodiment of the present invention to carrying out the concrete flow chart of adjusting up launch time;
Fig. 5 is the structured flowchart according to the adjusting device of the up launch time of the embodiment of the present invention;
Fig. 6 is the first concrete structure block diagram according to the adjusting device of the up launch time of the embodiment of the present invention;
Fig. 7 is the second concrete structure block diagram according to the adjusting device of the up launch time of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the application can combine mutually.
In order to improve the effect of community baton handover, the embodiment of the present invention provides method of adjustment and the device of a kind of up launch time.By up Tadv is adjusted, improved the accuracy of up Tadv, and then improved the success rate of community baton handover.Below by embodiment, be elaborated.
The present embodiment provides the method for adjustment of a kind of up launch time, and the method can realize in end side, the flow chart of the method for adjustment of up launch time as shown in Figure 2, and the method comprises the following steps (step S202-step S206):
Step S202, adjusted up Tadv;
Step S204, send up SB according to the up Tadv after adjusting to base station;
Step S206, the descending SB sent according to base station adjusts up launch time.
Pass through said method, first up Tadv is adjusted, then send up SB to base station according to the up Tadv after adjusting, the descending SB sent according to base station again adjusts up launch time, solved in the correlation technique accuracy of up Tadv lower, thereby affect the problem of community switching effect, thereby improved the reliability that up Tadv arranges, improved the success rate of community baton handover.
Up Tadv is adjusted and can be accomplished in several ways, because the receiver window of Midamble code only has 16chip, up receiver window is smaller, if up launch time, the Tx deviation ratio was larger, thereby cause uplink receiving signal exit window, NodeB will can not receive up Midamble code, therefore, can exit window as long as meet the uplink receiving signal, just can obtain suitable up Tadv.Below introduce two kinds of implementations adjusting up Tadv.
The first implementation is, terminal is according to the SYNC-DL data segment, judge whether the down-going synchronous position is stabilized near ideal position, if having, continuous m subframe be stabilized near ideal position (m, n are greater than 0 integer) for n time, judge and descendingly adjust, according to timing value now, up Tadv is done once and upgrades;
The second implementation is, terminal demodulation downstream signal judges the CRC of descending reception, if the crc error of switching starting stage,, by the descending timing adjustment of certain hour, until the CRC received is correct, then according to timing value now, up Tadv is done once and upgrades.
Two kinds of implementations based on the up Tadv of above-mentioned adjustment, the present embodiment provides a kind of preferred implementation, up Tadv is adjusted and comprises: according to the down-going synchronous position whether be stabilized in predeterminated position (be above-mentioned ideal position near, particular location can be determined according to actual conditions), up Tadv is adjusted.Above-mentioned up Tadv is also adjusted and comprised: whether correct according to descending CRC, up Tadv is adjusted.Success by the adjustment ，Wei community baton handover to up Tadv provides the foundation.
The first implementation for adjusting up Tadv, below be specifically described, and whether terminal is stabilized in predeterminated position according to the down-going synchronous position, and up Tadv is adjusted and comprises: detect the down-going synchronous position and whether be stabilized in above-mentioned predeterminated position; When above-mentioned down-going synchronous position stability being detected at above-mentioned predeterminated position, obtain current timing value, according to current timing value, up Tadv is adjusted.
Yet, before whether terminal detection down-going synchronous position is stabilized in predeterminated position, need to first determine the down-going synchronous position, therefore, the present embodiment provides a kind of preferred implementation, and terminal is obtained the SYNC-DL data segment, according to the SYNC-DL data segment, determines the down-going synchronous position.
For the second implementation of adjusting up Tadv, whether terminal is correct according to descending CRC, and up Tadv is adjusted and comprises: whether correctly detect descending CRC, when descending CRC being detected when correct, obtain current timing value, according to timing value before deserving, up Tadv is adjusted.
Below the adjustment process of up launch time is described, the present embodiment is confirmed by the signal quality to down receiving signal, improves the reliability that up Tadv arranges, and improves the success rate of community baton handover.Fig. 3 is that as shown in Figure 3, this flow process comprises the following steps (step S302-step S322) according to the flow chart of adjustment up launch time of the embodiment of the present invention:
Step S302, the RSCP intensity on the P-CCPCH of terminal measurement adjacent area and the OTD of adjacent area, wherein, the measurement of OTD utilizes the SYNC-DL data segment to realize.
Step S304, according to the control of network side, terminal Cong Yuan community is switched to Target cell, and according to the timing position of former community and the OTD of above-mentioned measurement, conversion is switched to the initial timing after Target cell.
Step S306, convert the initial uplink Tadv of Target cell according to the measured value of above-mentioned OTD.
Step S308, terminal receives the SYNC-DL data on Target cell, does down-going synchronous, adjusts accordingly the descending timing of terminal.
Step S310, terminal sends up SB according to the above-mentioned up Tadv converted out.
Step S312, base station receives up SB, and, according to the upward signal received, sends descending SB.Wherein, this descending SB comprises the SS order of adjusting up launch time.
Step S314, terminal, according to the SS order in the descending SB received, is adjusted up launch time to rational position.
Step S316, whether whether terminal is stabilized near ideal position according to the down-going synchronous position, or correct according to the CRC of descending reception, and up Tadv is upgraded.
Particularly, terminal, according to the SYNC-DL data segment, judges whether the down-going synchronous position is stabilized near ideal position, if continuous m subframe has, is stabilized in for n time near ideal position, judge and descendingly adjust, more up Tadv is upgraded according to timing value now.
Perhaps, the signal that the terminal demodulation is descending, judge that whether the CRC of descending reception is correct, if switching starting stage crc error carries out descending timing adjustment by certain hour, until CRC is correct, then according to timing value now, more up Tadv upgraded.
Step S318, terminal sends up SB according to the up Tadv after upgrading.
Step S320, base station receives up SB, and, according to the upward signal received, sends descending SB.Wherein, this descending SB comprises the SS order of adjusting up launch time.
Step S322, terminal, according to the SS order in the descending SB received, is adjusted up launch time to rational position.
Fig. 4 be according to the embodiment of the present invention to carrying out the concrete flow chart of adjusting up launch time, as shown in Figure 4, this flow process comprises the following steps (step S402-step S420):
Step S402, the RSCP intensity on the P-CCPCH of terminal measurement adjacent area and the OTD of adjacent area, wherein the measurement of OTD realizes by the SYNC-DL data segment of 8 samplings.The scene of supposing the present embodiment is as follows, and 1 baton handover is to community 8 from community for terminal, and terminal is by receiving the SYNC-DL data segment of 64chip, and before and after the SYNC-DL data segment, the GP of each 32chip realizes down-going synchronous.The timing position of community 1 is: the up launch time of t1， community 1: tadv1, the OTD of community 8 is: OTD8.
Step S404, according to the control of network side, terminal Cong Yuan community 1 is switched to Target cell 8, is switched to Target cell 8 initial timing afterwards and converts according to timing position and the above-mentioned OTD measured of former community 1.Convert formula can be: t8=t1+OTD8.
Step S406, according to the measured value of above-mentioned OTD, the initial uplink Tadv of conversion Target cell.Convert formula can be: tadv8=tadv1+2 * OTD8.
Step S408, terminal receives the SYNC-DL data on Target cell 8, does down-going synchronous, adjusts accordingly the descending timing of terminal.
Step S410, terminal sends up SB according to above-mentioned up Tadv.
Step S412, base station receives up SB, and, according to the upward signal received, sends descending SB.Wherein, this descending SB comprises the SS order of adjusting up launch time.
Step S414, whether whether terminal is stabilized near ideal position according to the down-going synchronous position, or correct according to the CRC of descending reception, and up Tadv is upgraded.
Particularly; terminal is according to the SYNC-DL data segment; judge whether the down-going synchronous position is stabilized near ideal position, if continuously in m(the present embodiment, get m=4) individual subframe have in n(the present embodiment get n=3) near inferior be stabilized in ideal position 257 (and since 1 timing, 8 sampling precision; If 4 sampling precision, ideal value is 129, by that analogy), judges and descendingly adjusts, and according to timing value t8new now, more up tadv8 is done once and upgrades.
Perhaps, the signal that the terminal demodulation is descending, judge the CRC of descending reception, if switching starting stage crc error, carry out descending timing adjustment by certain hour, until the CRC received is correct, terminal is done once and is upgraded up tadv8 again according to timing value t8new now.The specific implementation formula can be: Δ t=t8new-t8, tadv8new=tadv8+2 * Δ t.
Step S416, terminal sends up SB according to up tadv8new.
Step S418, base station receives up SB, and, according to the upward signal received, sends descending SB.Wherein, this descending SB comprises the SS order of adjusting up launch time.
Step S420, terminal is adjusted up launch time to rational position according to the SS order in the descending SB received.
The present embodiment is by the difference of sync bit and ideal position, or the CRC of descending reception judges the quality of descending reception, improves up Tadv reliability is set, and improved in weak signal and the strong success rate with community switching under scene frequently.
Corresponding to the method for adjustment of above-mentioned up launch time, the present embodiment provides the adjusting device of a kind of up launch time, and this device can be arranged on end side, for realizing above-described embodiment.Fig. 5 is the structured flowchart according to the adjusting device of the up launch time of the embodiment of the present invention, and as shown in Figure 5, this device comprises: the first adjusting module 10, sending module 20 and the second adjusting module 30.Below this structure is described.
The first adjusting module 10, for being adjusted up Tadv;
Sending module 20, be connected to the first adjusting module 10, for the up Tadv after adjusting according to above-mentioned the first adjusting module 10, sends up SB to base station;
The second adjusting module 30, be connected to sending module 20, for the descending SB sent according to base station, adjusts up launch time.
Pass through said apparatus, the first adjusting module 10 is first adjusted up Tadv, then sending module 20 sends up SB according to the up Tadv after adjusting to base station, the descending SB that the second adjusting module 30 sends according to base station again adjusts up launch time, solved in the correlation technique accuracy of up Tadv lower, thereby affect the problem of community switching effect, thereby improved the reliability that up Tadv arranges, improved the success rate of community baton handover.
The up Tadv of the first 10 pairs of adjusting modules adjusts and can be accomplished in several ways, can exit window as long as meet the uplink receiving signal, just can obtain suitable up Tadv.Front by the agency of adjust two kinds of implementations of up Tadv, do not repeat them here, based on this, the present embodiment provides a kind of preferred implementation, the first concrete structure block diagram of the adjusting device of up launch time as shown in Figure 6, the modules of this device in comprising above-mentioned Fig. 5, above-mentioned the first adjusting module 10 also comprises: the first adjustment unit 12, for according to the down-going synchronous position, whether being stabilized in predeterminated position, up Tadv is adjusted.Perhaps, whether the second adjustment unit 14, for correct according to descending CRC, adjusted up Tadv.Fig. 6 be take above-mentioned the first adjusting module 10 and is comprised that the first adjustment unit 12 describes as example.
For the first implementation of adjusting up Tadv, below be specifically described, Fig. 7 is the second concrete structure block diagram according to the adjusting device of the up launch time of the embodiment of the present invention, as shown in Figure 7, the modules of this device in comprising above-mentioned Fig. 6, above-mentioned the first adjustment unit 12 also comprises: the first detection sub-unit 120 and first is adjusted subelement 122.Below this structure is described.
Whether the first detection sub-unit 120, be stabilized in predeterminated position for detection of the down-going synchronous position;
First adjusts subelement 122, is connected to the first detection sub-unit 120, for when above-mentioned the first detection sub-unit 120 detects the down-going synchronous position stability at predeterminated position, obtains current timing value, according to timing value before deserving, up Tadv is adjusted.
Yet, before whether terminal detection down-going synchronous position is stabilized in predeterminated position, need to first determine the down-going synchronous position, therefore, the present embodiment provides a kind of preferred implementation, and above-mentioned the first adjustment unit 12 also comprises: obtain subelement, for obtaining the SYNC-DL data segment; Determine subelement, for according to above-mentioned, obtain the SYNC-DL data segment that subelement obtains and determine above-mentioned down-going synchronous position.
For the second implementation of adjusting up Tadv, whether terminal is correct according to descending CRC, and up Tadv is adjusted and comprises: whether correctly detect descending CRC, when descending CRC being detected when correct, obtain current timing value, according to timing value before deserving, up Tadv is adjusted.Based on this, the present embodiment provides a kind of preferred implementation, and above-mentioned the second adjustment unit 14 comprises: whether the second detection sub-unit is correct for detection of descending CRC; Second adjusts subelement, for descending CRC being detected when above-mentioned the second detection sub-unit when correct, obtains current timing value, according to deserving front timing value, up Tadv is adjusted.
As can be seen from the above description, the CRC of the difference of the present invention by sync bit and ideal position or descending reception judges the quality of descending reception, improved the reliability that arranges of up Tadv, improved the success rate of switching under weak signal and strong same scene frequently.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order be different from herein, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. the method for adjustment of a up launch time, is characterized in that, comprising:
Up emission time initial lead Tadv is adjusted;
Send up special burst signal SB to base station according to the described up Tadv after adjusting;
The descending SB sent according to base station adjusts up launch time.
2. method according to claim 1, is characterized in that, described up Tadv is adjusted and comprises:
Whether be stabilized in predeterminated position according to the down-going synchronous position, described up Tadv is adjusted.
3. method according to claim 1, is characterized in that, described up Tadv is adjusted and comprises:
According to downlink cycle redundant check code, whether CRC is correct, and described up Tadv is adjusted.
4. method according to claim 2, is characterized in that, according to described down-going synchronous position, whether is stabilized in described predeterminated position, and described up Tadv is adjusted and comprises:
Detect described down-going synchronous position and whether be stabilized in described predeterminated position;
When described down-going synchronous position stability being detected at described predeterminated position, obtain current timing value, according to described current timing value, up Tadv is adjusted.
5. method according to claim 4, is characterized in that, detects before whether described down-going synchronous position be stabilized in described predeterminated position, and described method also comprises:
Obtain the SYNC-DL data segment;
Determine described down-going synchronous position according to described SYNC-DL data segment.
6. whether method according to claim 3, is characterized in that, correct according to described descending CRC, and described up Tadv is adjusted and comprises:
Whether correctly detect described descending CRC;
When described descending CRC being detected when correct, obtain current timing value, according to described current timing value, up Tadv is adjusted.
7. the adjusting device of a up launch time, is characterized in that, comprising:
The first adjusting module, for being adjusted up emission time initial lead Tadv;
Sending module, send up special burst signal SB for the described up Tadv according to after described the first adjusting module adjustment to base station;
The second adjusting module, adjust up launch time for the descending SB sent according to base station.
8. device according to claim 7, is characterized in that, described the first adjusting module comprises:
The first adjustment unit, for according to the down-going synchronous position, whether being stabilized in predeterminated position, adjusted described up Tadv.
9. device according to claim 7, is characterized in that, described the first adjusting module comprises:
Whether the second adjustment unit, for correct according to downlink cycle redundant check code CRC, adjusted described up Tadv.
10. device according to claim 8, is characterized in that, described the first adjustment unit comprises:
Whether the first detection sub-unit, be stabilized in described predeterminated position for detection of described down-going synchronous position;
First adjusts subelement, for when described the first detection sub-unit detects described down-going synchronous position stability at described predeterminated position, obtains current timing value, according to described current timing value, up Tadv is adjusted.
11. device according to claim 10, is characterized in that, described the first adjustment unit also comprises:
Obtain subelement, for obtaining the SYNC-DL data segment;
Determine subelement, for according to described, obtain the described SYNC-DL data segment that subelement obtains and determine described down-going synchronous position.
12. device according to claim 9, is characterized in that, described the second adjustment unit comprises:
Whether the second detection sub-unit is correct for detection of described descending CRC;
Second adjusts subelement, for described descending CRC being detected when described the second detection sub-unit when correct, obtains current timing value, according to described current timing value, up Tadv is adjusted.
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