CN101043254B - Method for processing terminal to transmit uplink signal - Google Patents
Method for processing terminal to transmit uplink signal Download PDFInfo
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- CN101043254B CN101043254B CN200610065484A CN200610065484A CN101043254B CN 101043254 B CN101043254 B CN 101043254B CN 200610065484 A CN200610065484 A CN 200610065484A CN 200610065484 A CN200610065484 A CN 200610065484A CN 101043254 B CN101043254 B CN 101043254B
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- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000012549 training Methods 0.000 claims description 4
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Abstract
The invention discloses a processing method of terminal emission up-bound signal, radio frequency channel process delay is stored in terminal, and this method includes: the terminal obtains the emission time initial lead, when the terminal sends up-bound signal, the radio frequency emission channel brings forwards radio frequency channel process delay to process the radio frequency signal on foundation of said emission time initial lead, then it sends the up-bound signal to base station. The invention eliminates the effect of delay to emission time initial lead TADV by compensating the delay of process of signal, so the emission time initial lead TADV which is reported by terminal to network is the delay of signal in air, the network side can locate precisely according to the emission timeinitial lead TADV which is reported by terminal. Besides, the invention provides multiple realization modes, it can be chosen based on real condition, and the realization is more flexible.
Description
Technical field
The present invention relates to synchronous code division multiple access of time-division and insert (TD-SCDMA, TimeDivision-Synchronous Code Division Multiple Access) technology, be meant a kind of processing method of terminal to transmit uplink signal especially.
Background technology
The TD-SCDMA system is a system that up-downgoing is synchronous, requires terminal must keep synchronously in communicating by letter with the base station, so that terminal and base station are detected the signal that receives.On the one hand, can be in order to guarantee the base station according to the time synchronized of himself, correct receiving terminal is to the upward signal of its transmission, and terminal must shift to an earlier date a period of time transmission upward signal, should a period of time in advance be called emission time initial lead T
ADVLike this, terminal need be measured emission time initial lead T
ADVOn the other hand, network side is according to the emission time initial lead T of terminal to report
ADVAnd terminal is positioned in conjunction with other data.Below at first to emission time initial lead T
ADVThe process of obtaining is described.
The Cell searching stage, terminal is at first by feature window searching downlink pilot frequency slot (DwPTS, Downlink Pilot Time Slot) Position Approximate, after determining the Position Approximate of DwPTS, by calculating the relevant of DwPTS signal and 32 descending synchronous codes (SYNC_DL), because SYNC_DL has orthogonality preferably to each other, the SYNC_DL that obtains the correlation peak maximum is the employed SYNC_DL of terminal present access subzone, and accurately determines the position of SYNC_DL.SYNC_DL is predefined 64 pseudo noises (PN) sequences, and SYNC_DL has 32 kinds of possible selections at most.The SYNC_DL of neighbor cell is different in the TD-SCDMA system, and the SYNC_DL of non-conterminous sub-district can be multiplexing.According to the position of SYNC_DL and the frame structure of TD-SCDMA system, terminal determine self regularly the frame head position and the position of uplink pilot time slot (UpPTS, Uplink PilotTime Slot), this UpPTS is used to carry uplink synchronous code (SYNC-UL).SYNC-UL in the TD-SCDMA system is divided into 32 groups, and every group of 8 SYNC-UL are corresponding with a SYNC_DL.Because SYNC_DL is determined by the base station, therefore, 8 SYNC-UL for the base station and the terminal that has obtained down-going synchronous all be known, when terminal is set up uplink synchronous, to from 8 known SYNC-UL, select 1 at random, and in UpPTS, launch according to timing and the performance number estimated.
Random access procedure, terminal adopts the method for attempting access, time and the pairing time of self regularly determining of UpPTS and inequality of the actual transmission of terminal SYNC-UL, there is difference between the two, this difference is emission time initial lead T
ADVAfter the SYNC-UL of terminal transmission is received in the base station, according to the corresponding relation (1 SYNC_DL corresponding 8 SYNC-ULs) of SYNC_DL with SYNC-UL, relevant with these 8 SYNC-UL respectively, determine actual SYNC-UL that receives and the position of receiving SYNC-UL according to correlated results, and with this information-bearing at forward physical access channel (FPACH, Front Physical Access Channel) send to terminal in, the information that the terminal basis is received is to emission time initial lead T
ADVAdjust, radio frequency is sent out passage the relevant information of terminal self is shifted to an earlier date emission time initial lead T then
ADVCarry out radio frequency processing, and be carried in the Physical Random Access Channel (PRACH, Physical Random Access Channel) and send to the base station.
After Radio Link was set up, the base station was estimated to be offset the launch time of terminal by user's training sequence (midamble) sign indicating number of measuring terminals, and came indicating terminal according to setting step-length to emission time initial lead T by adjust order to the terminal transmission
ADVAdjust, realize the maintenance of terminal uplink synchronous.
Emission time initial lead T
ADVReal embody be the antenna for base station mouth to the propagation delay time between the terminal antenna mouth, but above-described emission time initial lead T
ADVBe reference point regularly, obtain with the baseband signal transmitting-receiving, do not have the propagation delay time that consideration is introduced Signal Processing owing to the radio-frequency channel, the emission time initial lead T that so just causes terminal to obtain by base band signal process
ADVIn comprise the time delay t that signal transmits aloft
1And radio-frequency channel time delay t that signal is handled
2Two parts have also been regarded the time delay that signal is handled as time delay that signal transmits aloft in the radio-frequency channel.Though it is skyborne synchronously that above-mentioned this processing method can't influence signal, the emission time initial lead T that causes terminal to report to network side
ADVCorrectly the skyborne propagation delay time of reflected signal makes network side according to emission time initial lead T
ADVCan produce very big deviation when terminal is positioned, this deviation is 1/2 * 3 * 10
8* t
2(microsecond) * 10
-6Rice, the propagation delay time that the terminal radio frequency passage is handled signal is several microseconds, like this, network side is according to according to emission time initial lead T
ADVThe error that terminal is positioned is more than hundreds of rice.
According to above description as seen, the emission time initial lead T that terminal is reported to network side
ADVReally be presented as the time delay that signal transmits aloft, thereby make the network side can be according to the emission time initial lead T of terminal to report
ADVTerminal is accurately located, become the problem of needing solution at present badly.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of processing method of terminal to transmit uplink signal, make the emission time initial lead T that terminal reports to network side
ADVReally be presented as the time delay that signal transmits aloft, thereby make the network side can be according to the emission time initial lead T of terminal to report
ADVTerminal is accurately located.
In order to achieve the above object, the invention provides a kind of processing method of terminal to transmit uplink signal, store the radio-frequency channel processing delay in the terminal, the method includes the steps of:
A, terminal are obtained emission time initial lead;
B, terminal when the base station upward signal, radio frequency send out passage on the basis of described emission time initial lead more in advance the radio-frequency channel processing delay signal is carried out radio frequency processing, then to this upward signal of base station.
Described radio-frequency channel processing delay is that radio frequency is sent out the passage processing delay.
Described radio-frequency channel processing delay is that radio frequency is sent out the passage processing delay and radio frequency is received the passage processing delay, further comprise before the described step B: the radio frequency receipts passage of terminal receives and handles the downstream signal from the base station, obtain baseband signal, abandon radio frequency and receive the interior invalid data of passage processing delay, send remaining baseband signal to baseband processing unit then, adjust the time reference of terminal; Described step B is: terminal is when the base station upward signal, radio frequency is sent out passage according to adjusted time reference, on the basis of described emission time initial lead more in advance radio frequency send out the passage processing delay signal carried out radio frequency processing, then to this upward signal of base station.
Described radio frequency is sent out passage processing delay and radio frequency and is received the passage processing delay when identical, and terminal storage has data.
Described radio frequency is received the invalid data in the passage processing delay: for being positioned at the section start of baseband signal; Or for being positioned at ending place of baseband signal; Or be between baseband signal head and the tail one section; Or be in baseband signal arbitrary extracting, radio frequency receives the invalid data of passage processing delay in the time.
Described radio-frequency channel processing delay is whole processing delay of radio-frequency channel transmitting-receiving, and this processing delay is a numerical value.
Described in the step B be: when the radio-frequency channel disposes to upward signal, immediately to the base station upward signal to the base station upward signal.
Described in the step B to the base station upward signal be: the radio-frequency channel shifts to an earlier date described emission time initial lead to the base station upward signal according to emission time initial lead.
Described steps A is: terminal is determined the employed descending synchronous code SYNC_DL of present access subzone, and accurately determines the position of descending synchronous code SYNC_DL.Insert the frame structure of TD-SCDMA system according to the position of descending synchronous code SYNC_DL and synchronous code division multiple access of time-division, terminal is determined the position that the uplink pilot time slot UpPTS of uplink synchronous code SYNC-UL is carried in self frame head position and being used to regularly, after the uplink synchronous code SYNC-UL of terminal transmission is received in the base station, corresponding relation according to a descending synchronous code SYNC_DL and eight uplink synchronous code SYNC-UL, eight uplink synchronous code SYNC-UL with corresponding are relevant respectively, determine actual uplink synchronous code SYNC-UL that receives and the position of receiving uplink synchronous code SYNC-UL, determine the information of emission time initial lead according to the described uplink synchronous code SYNC-UL that receives and the position of receiving uplink synchronous code SYNC-UL, and the information of described emission time initial lead sent to terminal, terminal is obtained described emission time initial lead according to the information of the described emission time initial lead of receiving.
This method further comprises: skew launch time of terminal is estimated in the base station by the user's training sequence sign indicating number of measuring terminals, and, keep the uplink synchronous of terminal by coming indicating terminal emission time initial lead to be adjusted according to setting step-length to terminal transmission adjustment order.
According to the proposed method, by compensation radio-frequency channel time delay that signal is handled, eliminate since the time delay that handle signal the radio-frequency channel to emission time initial lead T
ADVInfluence, with the emission time initial lead T that guarantees that terminal reports to network side
ADVReally be presented as the time delay that signal transmits aloft, make that network side can be according to the emission time initial lead T of terminal to report
ADVTerminal is accurately located.
In addition, provide multiple implementation among the present invention, can choose arbitrarily, made that realization is more flexible according to actual conditions.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Among the present invention by compensation radio-frequency channel time delay that signal is handled, eliminate since the time delay that handle signal the radio-frequency channel to emission time initial lead T
ADVInfluence, with the emission time initial lead T that guarantees that terminal reports to network side
ADVReally be presented as the time delay that signal transmits aloft.Below specific implementation step of the present invention is described in detail.
Implementation one
Storing radio frequency in the terminal sends out time delay-radio frequency that passage handles signal and sends out passage processing delay Δ Ttx.Radio frequency is sent out passage processing delay Δ Ttx and can be obtained by instrument or some method of measurement.
The Cell searching stage, terminal is at first by the Position Approximate of feature window search DwPTS, determine the Position Approximate of DwPTS after, by calculating the relevant of DwPTS signal and 32 SYNC_DL, determine the employed SYNC_DL of terminal present access subzone, and accurately determine the position of SYNC_DL.According to the position of SYNC_DL and the frame structure of TD-SCDMA system, terminal determine self regularly the frame head position and the position of UpPTS, this UpPTS is used to carry SYNC-UL.
After the SYNC-UL of terminal transmission is received in the base station, according to the corresponding relation (1 SYNC_DL corresponding 8 SYNC-ULs) of SYNC_DL with SYNC-UL, carry out relevant with corresponding 8 SYNC-UL respectively, determine actual SYNC-UL that receives and the position of receiving SYNC-UL according to correlated results, and this information-bearing sent to terminal in FPACH, terminal according to the information of receiving to emission time initial lead T
ADVAdjust.
After Radio Link was set up, the base station was estimated to be offset the launch time of terminal by the user's training sequence sign indicating number of measuring terminals, and came indicating terminal according to setting step-length to emission time initial lead T by adjust order to the terminal transmission
ADVAdjust, realize the maintenance of uplink synchronous.
Terminal obtains emission time initial lead T
ADVAfter, when the base station upward signal, take into account for radio frequency being sent out passage processing delay Δ Ttx, guarantee the emission time initial lead T that terminal reports to network side
ADVReally be presented as the time delay that signal transmits aloft, radio frequency is sent out passage and is needed at emission time initial lead T
ADVThe basis on more in advance radio frequency send out passage processing delay Δ Ttx upward signal carried out radio frequency processing, can when upward signal be disposed, directly open radio frequency and send out passage then, to this upward signal of base station; Also can be after upward signal be disposed, again according to emission time initial lead T
ADV, shift to an earlier date emission time initial lead T
ADVOpen radio frequency and send out passage, to this upward signal of base station.
Because the radio-frequency channel can comprise that radio frequency is received passage and radio frequency is sent out passage, radio frequency is received the time delay that passage is handled signal, can cause the change of time reference, therefore, can receive the passage processing delay according to radio frequency time reference is adjusted, so that network side is according to the emission time initial lead T of terminal to report
ADVMore accurate to the location that terminal is carried out, like this, send out passage processing delay Δ Ttx except that storing radio frequency in the terminal, also store radio frequency and receive time delay-radio frequency receipts passage processing delay Δ Trx that passage is handled signal.Radio frequency is received passage processing delay Δ Trx and can be obtained by instrument or some method of measurement equally.
The radio frequency receipts passage of terminal receives and handles the downstream signal from the base station, obtains baseband signal, abandons radio frequency and receives interior invalid data of passage processing delay Δ Trx time, then to the remaining baseband signal of baseband processing unit.Receive the invalid data of passage processing delay Δ Trx in the time by abandoning radio frequency, the frame head, the slot timing that utilize relevant or other method to obtain terminal itself when making Base-Band Processing have shifted to an earlier date Δ Trx with respect to not abandoning under the invalid data situation, realize adjustment, make the time reference of terminal shift to an earlier date the time reference of terminal.Described radio frequency is received the section start that interior invalid data of passage processing delay Δ Trx time can be positioned at baseband signal, also can be positioned at ending place of baseband signal, also can be between baseband signal head and the tail one section, also can be in baseband signal arbitrary extracting, radio frequency receives the invalid data of passage processing delay Δ Trx in the time.
Terminal obtains emission time initial lead T
ADVAfter, when the base station upward signal, radio frequency is sent out passage according to adjusted time reference, at emission time initial lead T
ADVThe basis on more in advance radio frequency send out passage processing delay Δ Ttx upward signal carried out radio frequency processing, can when upward signal be disposed, directly open radio frequency and send out passage then, to this upward signal of base station; Also can be after upward signal be disposed, again according to emission time initial lead T
ADV, shift to an earlier date emission time initial lead T
ADVOpen radio frequency and send out passage, to this upward signal of base station.
Two data are identical if radio frequency is sent out passage processing delay Δ Ttx and radio frequency receipts passage processing delay Δ Trx, and then terminal can only be stored a data Δ T.
Implementation two
Store the time delay-radio-frequency channel transmitting-receiving processing delay Δ Tx that the radio-frequency channel is handled by signal in the terminal, this radio-frequency channel transmitting-receiving processing delay Δ Tx is that radio frequency is sent out passage processing delay Δ Ttx and radio frequency is received passage processing delay Δ Trx sum, only stores transmitting-receiving processing delay Δ Tx data in radio-frequency channel in the terminal.Radio-frequency channel transmitting-receiving processing delay Δ Tx can obtain by instrument or some method of measurement equally; Also can obtain radio frequency respectively and send out passage processing delay Δ Ttx and radio frequency receipts passage processing delay Δ Trx, then the two addition is obtained radio-frequency channel transmitting-receiving processing delay Δ Tx, if it is identical with two data of radio frequency receipts passage processing delay Δ Trx that radio frequency is sent out passage processing delay Δ Ttx, then radio-frequency channel transmitting-receiving processing delay Δ Tx is two times that radio frequency is sent out passage processing delay Δ Ttx or radio frequency receipts passage processing delay Δ Trx.
Terminal obtains emission time initial lead T
ADVAfter, when the base station upward signal, take into account for the radio-frequency channel being received and dispatched processing delay Δ Tx, guarantee the emission time initial lead T that terminal reports to network side
ADVReally be presented as the time delay that signal transmits aloft, radio frequency is sent out passage and is needed at emission time initial lead T
ADVThe basis on again the processing delay of radio-frequency channel transmitting-receiving in advance Δ Tx upward signal is carried out radio frequency processing, can when upward signal be disposed, directly open radio frequency and send out passage then, to this upward signal of base station; Also can be after upward signal be disposed, again according to emission time initial lead T
ADV, shift to an earlier date emission time initial lead T
ADVOpen radio frequency and send out passage, to this upward signal of base station.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. the processing method of a terminal to transmit uplink signal is characterized in that, stores the radio-frequency channel processing delay in the terminal, and the method includes the steps of:
A, terminal are obtained emission time initial lead;
B, terminal when the base station upward signal, radio frequency send out passage on the basis of described emission time initial lead more in advance the radio-frequency channel processing delay signal is carried out radio frequency processing, then to this upward signal of base station.
2. method according to claim 1 is characterized in that, described radio-frequency channel processing delay is that radio frequency is sent out the passage processing delay.
3. method according to claim 1 is characterized in that, described radio-frequency channel processing delay is that radio frequency is sent out the passage processing delay and radio frequency is received the passage processing delay,
Further comprise before the described step B: the radio frequency receipts passage of terminal receives and handles the downstream signal from the base station, obtain baseband signal, abandon radio frequency and receive the interior invalid data of passage processing delay, send remaining baseband signal to baseband processing unit then, adjust the time reference of terminal;
Described step B is: terminal is when the base station upward signal, radio frequency is sent out passage according to adjusted time reference, on the basis of described emission time initial lead more in advance radio frequency send out the passage processing delay signal carried out radio frequency processing, then to this upward signal of base station.
4. method according to claim 3 is characterized in that, described radio frequency is sent out passage processing delay and radio frequency and received the passage processing delay when identical, and terminal storage has data.
5. method according to claim 3 is characterized in that, described radio frequency is received the invalid data in the passage processing delay: for being positioned at the section start of baseband signal; Or for being positioned at ending place of baseband signal; Or be between baseband signal head and the tail one section; Or be in baseband signal arbitrary extracting, radio frequency receives the invalid data of passage processing delay in the time.
6. method according to claim 1 is characterized in that, described radio-frequency channel processing delay is whole processing delay of radio-frequency channel transmitting-receiving, and this processing delay is a numerical value.
7. according to each described method of claim 1 to 4, it is characterized in that, described in the step B be: when the radio-frequency channel disposes to upward signal, immediately to the base station upward signal to the base station upward signal.
8. according to each described method of claim 1 to 4, it is characterized in that, described in the step B to the base station upward signal be: the radio-frequency channel shifts to an earlier date described emission time initial lead to the base station upward signal according to emission time initial lead.
9. method according to claim 1, it is characterized in that, described steps A is: terminal is determined the employed descending synchronous code SYNC_DL of present access subzone, and accurately determine the position of descending synchronous code SYNC_DL, insert the frame structure of TD-SCDMA system according to the position of descending synchronous code SYNC_DL and synchronous code division multiple access of time-division, terminal is determined the position that the uplink pilot time slot UpPTS of uplink synchronous code SYNC-UL is carried in self frame head position and being used to regularly, after the uplink synchronous code SYNC-UL of terminal transmission is received in the base station, corresponding relation according to a descending synchronous code SYNC_DL and eight uplink synchronous code SYNC-UL, eight uplink synchronous code SYNC-UL with corresponding are relevant respectively, determine actual uplink synchronous code SYNC-UL that receives and the position of receiving uplink synchronous code SYNC-UL, determine the information of emission time initial lead according to the described uplink synchronous code SYNC-UL that receives and the position of receiving uplink synchronous code SYNC-UL, and the information of described emission time initial lead sent to terminal, terminal is obtained described emission time initial lead according to the information of the described emission time initial lead of receiving.
10. method according to claim 1, it is characterized in that, this method further comprises: skew launch time of terminal is estimated in the base station by the user's training sequence sign indicating number of measuring terminals, and, keep the uplink synchronous of terminal by coming indicating terminal emission time initial lead to be adjusted according to setting step-length to terminal transmission adjustment order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610065484A CN101043254B (en) | 2006-03-24 | 2006-03-24 | Method for processing terminal to transmit uplink signal |
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| CN200610065484A CN101043254B (en) | 2006-03-24 | 2006-03-24 | Method for processing terminal to transmit uplink signal |
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| CN101043254B true CN101043254B (en) | 2010-05-26 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2255588B1 (en) * | 2008-03-20 | 2018-05-09 | Telefonaktiebolaget LM Ericsson (publ) | Scheduling of uplink measurement reports |
| CN101841778A (en) * | 2009-03-17 | 2010-09-22 | 松下电器产业株式会社 | Method and device for adjusting timing advance in uplink multipoint reception |
| CN101720105B (en) * | 2009-12-01 | 2012-08-29 | 哈尔滨海能达科技有限公司 | Method for solving problem of coverage distance limitation of DMR communication system |
| CN102802226B (en) * | 2011-05-25 | 2016-06-22 | 联芯科技有限公司 | The system and method for terminal timing is adjusted during the switching of radio-frequency channel |
| CN103476103A (en) * | 2012-06-07 | 2013-12-25 | 中兴通讯股份有限公司 | Method and device for uplink transmission time adjustment |
| WO2016019686A1 (en) * | 2014-08-07 | 2016-02-11 | 深圳市中兴微电子技术有限公司 | A method for scheduling transmitting timing of uplink channels and device |
| CN109983811B (en) * | 2016-11-30 | 2021-01-29 | 华为技术有限公司 | Synchronous time error correction method and device |
| WO2020042017A1 (en) * | 2018-08-29 | 2020-03-05 | 深圳市大疆创新科技有限公司 | Tdd communication method and device |
| CN109474986A (en) * | 2018-12-27 | 2019-03-15 | 西安电子科技大学 | Uplink synchronisation method, device, equipment, storage medium and LTE communication system |
| CN114071692B (en) * | 2020-08-07 | 2023-08-01 | 大唐移动通信设备有限公司 | Correction method, device and storage medium for transmission channel delay |
| CN114845235A (en) * | 2021-01-15 | 2022-08-02 | 大唐移动通信设备有限公司 | Information processing method and device, terminal and network side equipment |
| CN118283674A (en) * | 2022-12-29 | 2024-07-02 | 华为技术有限公司 | Communication method and communication device |
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| CN1126538A (en) * | 1993-07-05 | 1996-07-10 | 诺基亚电信公司 | Base station with time-aligned mobile transmitting moments according to distance to base station |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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Effective date of registration: 20210528 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |