CN101217308A - A synchronous channel transmitting method and device for time division duplex - Google Patents
A synchronous channel transmitting method and device for time division duplex Download PDFInfo
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- CN101217308A CN101217308A CNA200810001078XA CN200810001078A CN101217308A CN 101217308 A CN101217308 A CN 101217308A CN A200810001078X A CNA200810001078X A CN A200810001078XA CN 200810001078 A CN200810001078 A CN 200810001078A CN 101217308 A CN101217308 A CN 101217308A
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Abstract
The invention provides a synchronized signal channel sending method which is used for TDD systems and comprises the following steps of arranging a main synchronized channel of the synchronized channels with the circular prefix length of 144 Ts in the first OFDM symbol of DwPTS, arranging UpPTS and GP for leading the circular prefix of each symbol on the DwPTS to be same. The invention further provides a synchronized channel sending device which is used for TDD systems and comprises a first arranging module that is used for arranging the main synchronized channel of the synchronized channels with the circular prefix length of 144 Ts in the first OFDM symbol of the DwPTS; a second arranging module that is used for arranging the UpPTS and the GP for leading the circular prefix of each symbol on the DwPTS to be same. The synchronized channel designed by the invention can simplify the initial query procedure in a duplex mode and the procedure for processing DwPTS timeslots.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of synchronization channel transmission method and device that is used for TDD (TimeDivision Duplex, time division duplex) system.
Background technology
The frame structure of LTE (Long Term Evolution, Long Term Evolution) system TDD mode, as shown in Figure 1.In this frame structure; a 10ms (307200Ts; radio frames 1ms=30720Ts) is divided into the field of two 5ms, and it is 0.5ms (15360Ts) time slot and 3 special time slots that each field comprises 8 length: descending pilot frequency time slot DwPTS (Downlink Pilot Time Slot), protection be GP (Guard Period) and uplink pilot time slot UpPTS (Uplink Pilot Time Slot) at interval.The length of these three each time slots of special time slot is configurable, but total length is 1ms (30720Ts).The time slot of per two 0.5ms is formed the subframe that length is 1ms, is numbered subframe # 0～subframe # 9, and wherein, subframe # 1 and subframe # 6 comprise above-mentioned said special time slot, and subframe # 0 and subframe # 5 are fixed as descending time slot.Also there is another kind of model F DD (FrequencyDivision Duplex, Frequency Division Duplexing (FDD)) in current LTE system.
Fig. 2 is the structural representation of synchronizing channel under tdd mode and the fdd mode in the prior LTE system.For two kinds of patterns, when adopting normal cyclic prefix CP (Cyclic Prefix), the structure of its synchronizing channel as shown in Figure 2.For the FDD system, its primary synchronization channel P-SCH (Primary Synchronization Channel) sends on last OFDM of subframe # 0 and subframe #5 (Orthogonal Frequency Division Multiplexing) symbol, and auxiliary synchronization channel S-SCH (Secondary Synchronization Channel) sends on the penult OFDM of subframe # 0 and subframe # 5 symbol.And for the TDD system, P-SCH sends on first symbol of DwPTS time slot, and S-SCH sends on last symbol of subframe # 0 and subframe # 5.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
As can be seen from Figure 2, during for the employing normal cyclic prefix, because first OFDM symbol of each time slot has had more 16Ts (160-144=16) with respect to the CP of other OFDM symbols, therefore, when initial cell search, finished the timing synchronously of P-SCH after, carry out S-SCH when detecting according to the timing of P-SCH, for different dual-modes, S-SCH will occur regularly fuzzy.That is to say that for two kinds of dual-modes, P-SCH is different with fixed time interval between the S-SCH.Therefore, when user equipment (UE) (User Equipment) when carrying out initial ranging, when not about the duplex mode information of system the time, UE can not obtain correct S-SCH timing position after P-SCH has regularly detected.
Summary of the invention
The present invention aims to provide the synchronization channel transmission method and the device of a kind of TDD of being used for system, can solve in the prior art the fuzzy problem of the timing of S-SCH in the two class dual-modes.
In an embodiment of the present invention, provide a kind of synchronization channel transmission method that is used for tdd systems, may further comprise the steps: the primary synchronization channel in the synchronizing channel is arranged in first OFDM symbol of DwPTS, its circulating prefix-length is 144Ts; And UpPTS and GP are set, all identical so that DwPTS goes up the Cyclic Prefix of each symbol.
Preferably, UpPTS and GP are set, the Cyclic Prefix of each symbol is all identical specifically to be comprised so that DwPTS goes up: the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS; Or the symbol that 2 Cyclic Prefix are 160Ts is arranged among the GP; Or the symbol that 1 Cyclic Prefix is 160Ts is arranged among the GP, be that the symbol of 160Ts is arranged among the UpPTS with individual Cyclic Prefix; Or the symbol that 1 Cyclic Prefix is 160Ts is arranged among the GP, the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
Preferably, the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS and specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the GP and specifically comprises: UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-(N+M) * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP3)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
In an embodiment of the present invention, a kind of synchronizing channel dispensing device that is used for wireless communication system also is provided, comprise: first module, be used for the primary synchronization channel of synchronizing channel is arranged in first OFDM symbol of DwPTS, its circulating prefix-length is 144Ts; And second module, be used to be provided with UpPTS and GP, all identical so that DwPTS goes up the Cyclic Prefix of each symbol.
Preferably, second module specifically comprises following at least one unit: first module is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on UpPTS; Unit second is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on GP; Unit the 3rd is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the UpPTS; Unit the 4th is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
Preferably, the symbol that first module is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS and specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit second is 160Ts with 2 Cyclic Prefix is arranged among the GP and specifically comprises: UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-(N+M) * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit the 3rd is 160Ts with 2 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit the 3rd is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP3)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Synchronization channel transmission method of the above embodiment of the present invention and device are because reasonably designed the structure of synchronizing channel, so overcome the regularly fuzzy problem of S-SCH that two class duplex system structures do not match and cause in the prior art, and then can simplify the initial ranging process of dual-mode, and simplify effect to DwPTS time slot processing procedure.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the frame structure of LTE system TDD mode;
Fig. 2 is the structural representation of synchronizing channel under tdd mode and the fdd mode in the prior LTE system;
Fig. 3 shows the flow chart according to the synchronization channel transmission method of the embodiment of the invention;
Fig. 4 shows the block diagram according to the synchronizing channel dispensing device of the embodiment of the invention;
Fig. 5 is synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention;
Fig. 6 comprises the synchronous channel structure and the frame structure design diagram of the embodiment of the invention for another;
Fig. 7 comprises the synchronous channel structure and the frame structure design diagram of the embodiment of the invention for another;
Fig. 8 comprises the synchronous channel structure and the frame structure design diagram of the embodiment of the invention for another;
Fig. 9 comprises the synchronous channel structure and the frame structure design diagram of the embodiment of the invention for another.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 3 shows the flow chart according to the synchronization channel transmission method of the embodiment of the invention, may further comprise the steps:
Step S10 is arranged on the primary synchronization channel in the synchronizing channel in first OFDM symbol of DwPTS, and its circulating prefix-length is 144Ts; And
Step S20 is provided with UpPTS and GP, and is all identical so that DwPTS goes up the Cyclic Prefix of each symbol.
Tdd mode for prior LTE system, the time that its 3 special time slots continue is 1ms, corresponding 30720Ts, and the duration of each time slot is 0.5ms, the length of the Cyclic Prefix of first symbol correspondence of each time slot is 160Ts, and the circulating prefix-length of all the other symbol correspondences is 144Ts.And the synchronization channel transmission method of present embodiment is because reasonably designed the structure of synchronizing channel, so overcome the regularly fuzzy problem of S-SCH that two class duplex system structures do not match and cause in the prior art, and then can simplify the initial ranging process of dual-mode, and simplify effect to DwPTS time slot processing procedure.
In addition, about the allocation problem of three special time slots, in the prior art, some typical configurations are that UpPTS at most only accounts for last 2 symbols, and remaining is configured to DwPTS and GP.As can be seen from Figure 2, because in the 1ms that three special time slots continue, the CP length that always has the CP length of two symbols and other symbols is inconsistent, so the inconsistent situation of CP of CP and other OFDM symbols of certain OFDM symbol just might appear in the OFDM symbol in the DwPTS time slot.This demodulation to DwPTS also can bring unnecessary trouble.Obviously, the appropriate design of the foregoing description has also overcome this problem.
Preferably, UpPTS and GP are set, the Cyclic Prefix of each symbol is all identical specifically to be comprised so that DwPTS goes up: the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS; Or the symbol that 2 Cyclic Prefix are 160Ts is arranged among the GP; Or the symbol that 1 Cyclic Prefix is 160Ts is arranged among the GP, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the UpPTS; Or the symbol that 1 Cyclic Prefix is 160Ts is arranged among the GP, the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
Preferably, the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS and specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 2 Cyclic Prefix is arranged among the GP and specifically comprises: UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-(N+M) * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP3)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Fig. 4 shows the block diagram according to the synchronizing channel dispensing device of the embodiment of the invention, comprising:
The synchronizing channel dispensing device of this embodiment is because reasonably designed the structure of synchronizing channel, so overcome the regularly fuzzy problem of S-SCH that two class duplex system structures do not match and cause in the prior art, and then can simplify the initial ranging process of dual-mode, and simplify effect to DwPTS time slot processing procedure.
Preferably, second module specifically comprises following at least one unit: first module is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on UpPTS; Unit second is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on GP; Unit the 3rd is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the UpPTS; Unit the 3rd is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
Preferably, the symbol that first module is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS and specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit second is 160Ts with 2 Cyclic Prefix is arranged among the GP and specifically comprises: UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-(N+M) * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit the 3rd is 160Ts with 1 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP1)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Preferably, the symbol that Unit the 4th is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprises: UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is: T
GP=30720Ts-M * (T
Symbol+ CP3)-N * (T
Symbol+ CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
Easy for describing, suppose 1ms correspondence 30720% here, the length of DwPTS is N symbol (2≤N≤12), and the length of Cyclic Prefix is designated as CP1 during for 160Ts, and the length of Cyclic Prefix is designated as CP2 during for 144Ts, and the length of each OFDM symbol is designated as T
Symbol
Under above hypothesis, the corresponding following embodiment of concrete configuration in the special time slot.
Embodiment one
Fig. 5 has provided synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention.As shown in the figure, the length of UpPTS is 1 symbol, and the length of its corresponding Cyclic Prefix is CP1, and the circulating prefix-length of all symbols of DwPTS all is CP2, and this moment, the length of corresponding GP was:
T
GP＝30720Ts-(T
symbol+CP1)-N×(T
symbol+CP2)。
Embodiment two
Fig. 6 has provided synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention.As shown in the figure, the length of UpPTS is 1 symbol, and the length of its corresponding Cyclic Prefix is CP2, and the circulating prefix-length of all symbols of DwPTS all is CP2, and this moment, the length of corresponding GP was:
T
GP＝30720Ts-(N+1)×(T
symbol+CP2)。
Embodiment three
Fig. 7 has provided synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention.As shown in the figure, the length of UpPTS is 2 symbols, and the length of its corresponding Cyclic Prefix is CP1, and the circulating prefix-length of all symbols of DwPTS all is CP2, and this moment, the length of corresponding GP was:
T
GP＝30720Ts-2×(T
symbol+CP1)-N×(T
symbol+CP2)。
Embodiment four
Fig. 8 has provided synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention.As shown in the figure, the length of UpPTS is 2 symbols, and the length of its corresponding Cyclic Prefix is CP2, and the circulating prefix-length of all symbols of DwPTS all is CP2, and this moment, the length of corresponding GP was:
T
GP＝30720Ts-(N+2)×(T
symbol+CP2)。
Embodiment five
Fig. 9 has provided synchronous channel structure and the frame structure design diagram that comprises the embodiment of the invention.As shown in the figure, the length of UpPTS is 2 symbols, and the length of its corresponding Cyclic Prefix is CP3=CP1+ (CP1-CP2)/2, and the circulating prefix-length of all symbols of DwPTS all is CP2, and this moment, the length of corresponding GP was:
T
GP＝30720Ts-2×(T
symbol+CP3)-N×(T
symbol+CP2)。
From above description, as can be seen, the synchronization channel transmission method and the device that adopt the present invention to propose, obtained a kind of new frame structure design, it is irrelevant with the dual-mode of place system that the initial cell search procedure of UE will become, the timing relationship of P-SCH and S-SCH is fixed, and has solved in the existing synchronization channel transmission method S-SCH for different system's dual-modes fuzzy problem regularly down.Another principal character of the above embodiment of the present invention is that the circulating prefix-length of all symbols all is the same on the DwPTS time slot, and this can simplify the processing procedure of DwPTS time slot.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a synchronization channel transmission method that is used for tdd systems is characterized in that, may further comprise the steps:
Primary synchronization channel in the synchronizing channel is arranged in first OFDM symbol of DwPTS, its circulating prefix-length is 144Ts; And
UpPTS and GP are set, all identical so that DwPTS goes up the Cyclic Prefix of each symbol.
2. synchronization channel transmission method according to claim 1 is characterized in that, UpPTS and GP are set, and the Cyclic Prefix of each symbol is all identical specifically to be comprised so that DwPTS goes up:
The symbol that is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS; Or
The symbol that is 160Ts with 2 Cyclic Prefix is arranged among the GP; Or
The symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, and the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the UpPTS; Or
The symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, and the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
3. synchronization channel transmission method according to claim 2 is characterized in that, 2 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprise:
UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP1)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS
Be N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts;
CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
4. synchronization channel transmission method according to claim 2 is characterized in that, 2 Cyclic Prefix symbol that is 160Ts is arranged among the GP specifically comprise:
UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-(N+M)×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
5. synchronization channel transmission method according to claim 2 is characterized in that, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprise:
UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP1)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
6. synchronization channel transmission method according to claim 2 is characterized in that, the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprise:
UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP3)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
7. a synchronizing channel dispensing device that is used for the TDD system is characterized in that, comprising:
First module is used for the primary synchronization channel of synchronizing channel is arranged in first OFDM symbol of DwPTS, and its circulating prefix-length is 144Ts; And
Second module is used to be provided with UpPTS and GP, and is all identical so that DwPTS goes up the Cyclic Prefix of each symbol.
8. synchronizing channel dispensing device according to claim 7 is characterized in that, second module specifically comprises following at least one unit:
First module is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on UpPTS;
Unit second is used for the symbol that 2 Cyclic Prefix are 160Ts is arranged on GP;
Unit the 3rd is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 160Ts with 1 Cyclic Prefix is arranged among the UpPTS;
Unit the 4th is used for the symbol that 1 Cyclic Prefix is 160Ts is arranged on GP, and the symbol that is 152Ts with 2 Cyclic Prefix is arranged among the UpPTS.
9. synchronizing channel dispensing device according to claim 8 is characterized in that, the symbol that first module is 160Ts with 2 Cyclic Prefix is arranged among the UpPTS and specifically comprises:
UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP1)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
10. synchronizing channel dispensing device according to claim 8 is characterized in that, the symbol that Unit second is 160Ts with 2 Cyclic Prefix is arranged among the GP and specifically comprises:
UpPTS uses cyclic prefix CP 2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-(N+M)×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=1,2; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
11. synchronizing channel dispensing device according to claim 8 is characterized in that the symbol that Unit the 3rd is 160Ts with 1 Cyclic Prefix is arranged among the GP, 1 Cyclic Prefix symbol that is 160Ts is arranged among the UpPTS specifically comprise:
UpPTS uses cyclic prefix CP 1, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP1)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=1; The length of DwPTS is N symbol, 2≤N≤12; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
12. synchronizing channel dispensing device according to claim 8 is characterized in that the symbol that Unit the 4th is 160Ts with 1 Cyclic Prefix is arranged among the GP, 2 Cyclic Prefix symbol that is 152Ts is arranged among the UpPTS specifically comprise:
UpPTS uses cyclic prefix CP 3=CP1+ (CP1-CP2)/2, and the circulating prefix-length of last all symbols of DwPTS all is CP2, and at this moment the length of GP is:
T
GP＝30720Ts-M×(T
symbol+CP3)-N×(T
symbol+CP2)
Wherein, the length of UpPTS is M symbol, M=2; The length of DwPTS is N symbol, 2≤N≤11; CP1 represents that length is the Cyclic Prefix of 160Ts; CP2 represents that length is the Cyclic Prefix of 144Ts; The length of each OFDM symbol is T
Symbol
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|---|---|---|---|
| CN200810001078.XA CN101217308B (en) | 2008-01-18 | 2008-01-18 | For synchronization channel transmission method and the device of tdd systems |
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|---|---|---|---|
| CN200810001078.XA CN101217308B (en) | 2008-01-18 | 2008-01-18 | For synchronization channel transmission method and the device of tdd systems |
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| CN101217308B CN101217308B (en) | 2015-09-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729138B (en) * | 2008-10-15 | 2013-05-08 | 电信科学技术研究院 | Uplink and downlink transmission method, base station and user equipment |
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|---|---|---|---|---|
| CN101084695B (en) * | 2004-11-02 | 2013-03-27 | 北电网络有限公司 | Systems and methods for use with orthogonal frequency division multiplexing |
| CN101425888A (en) * | 2007-11-02 | 2009-05-06 | 北京三星通信技术研究有限公司 | Device and method for synchronous signal transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101729138B (en) * | 2008-10-15 | 2013-05-08 | 电信科学技术研究院 | Uplink and downlink transmission method, base station and user equipment |
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