CN101854646A - Uplink detection method, as well as uplink synchronization method, device and system of LTE (Long Term Evolution) - Google Patents
Uplink detection method, as well as uplink synchronization method, device and system of LTE (Long Term Evolution) Download PDFInfo
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- CN101854646A CN101854646A CN 200910161968 CN200910161968A CN101854646A CN 101854646 A CN101854646 A CN 101854646A CN 200910161968 CN200910161968 CN 200910161968 CN 200910161968 A CN200910161968 A CN 200910161968A CN 101854646 A CN101854646 A CN 101854646A
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- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
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Abstract
The embodiment of the invention discloses an uplink detection method of a long term evolution system, comprising the following steps of: receiving an access preamble sequence from UE (User Equipment), and correlating the access preamble sequence with a local sequence; calculating RTD (Round Trip Delay) according to a correlated peak value obtained by the correlation, and also calculating a TA (Timing Alignment) value; subtracting a preset value by the TA value to obtain a target TA value, and sending the target TA value to the UE for regulating time bias through a TA signalling. The embodiment of the invention also discloses a method and a device for realizing uplink synchronization and also provides equipment with the device and a communication system. The embodiment of the invention enables the data which is originally possible to reach eNodeB in advance to be laggingly sent by subtracting a preset value from the TA value, thereby reducing the probability of the data reaching the eNodeB in advance, wherein the data is sent by the UE; in addition, the embodiment of the invention reduces the probability of interference caused among signs, thereby reducing the error rate.
Description
Technical field
The present invention relates to communication technical field, more particularly, relate to LTE up link detection method, uplink synchronisation method, device and system.
Background technology
Long Term Evolution (Long Term Evolution, LTE) being a kind of broadband wireless technical standard that third generation partner program (3rdGeneration Partnership Project 3GPP) tissue proposes, is a High Data Rate, low time delay and based on the mobile communication system standard of full grouping.
In the LTE system, access technology is a very important technology at random, and subscriber equipment (UE) and evolved base station (eNodeB) normal data must insert alternately at random.The up timing that random access procedure generally occurs in UE synchronously also by aligning the time with ing, and in general, this situation often occurs in the synchronous tracking that UE has just entered the sub-district or omitted up link.Therefore, in the random access procedure, network side is mainly finished two tasks: set up the up time synchronized of UE and eNodeB, and finish the initial access of UE.
In the prior LTE system RACH detection method, eNodeB receives the access lead sequence (preamble sequence) that UE sends, described preamble sequential structure as shown in Figure 1, comprise Cyclic Prefix (CP, Cycle Prefix) and sequence part (Sequence), described CP is that the latter half (shown in the dash area among the figure) of getting Sequence obtains.Then, eNodeB calculates corresponding timing alignment (TA, Timing Alignment), and described TA value is sent to described UE in the mode of signaling (TA signaling).
UE can adjust the transmitting time of business datum according to the TA value after receiving described TA signaling, make UE and eNodeB synchronous.
In the process of carrying out the invention, the inventor finds, because the LTE system is based on OFDM (OFDM, Orthogonal Frequency Division Multiplex) system, have the OFDM correlation properties, if in time, partially change greater than 0 and during less than a predetermined value, if the OFDM symbol arrives eNodeB in advance, will cause both having comprised in the FFT integration window part sample value of current OFDM symbol, the part sample value that comprises next OFDM symbol CP again, can cause that like this (ISI InterSymbolInterference), causes the error rate to increase to intersymbol interference.
Summary of the invention
The embodiment of the invention provides long evolving system up link detection method device.
A kind of long evolving system up link detection method comprises:
Reception is from the access lead sequence of UE, and described access lead sequence and local sequence carried out relevant, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Calculate round-trip delay RTD according to the relevant correlation peak that obtains, and calculate timing alignment TA value;
Described TA value is deducted predetermined value obtain target TA value, and it is inclined to one side when adjusting by the TA signaling described target TA value to be sent to described UE.
A kind of long evolving system uplink synchronisation method comprises:
Send the access lead sequence to network side, described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Receive the TA signaling that comprises timing alignment TA value that network side sends, described TA value is that the described access lead sequence of network side foundation calculates after relevant with its local sequence;
Described TA value is deducted predetermined value obtain target TA value, and inclined to one side when adjusting, realize synchronous with network side according to described target TA value.
A kind of base station comprises:
Correlation unit is used for carrying out from the access lead sequence of UE and local sequence relevantly, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
First computing unit calculates round-trip delay RTD according to the relevant correlation peak that obtains, and calculates timing alignment TA value;
Second computing unit deducts predetermined value with described TA value and obtains target TA value;
Transmitting element is used for described target TA value is sent to described UE, and described target TA value is a described UE inclined to one side benchmark when adjusting.
A kind of communication system comprises:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, described TA value is deducted predetermined value obtain target TA value, and described target TA value is sent to subscriber equipment;
Inclined to one side when described subscriber equipment is adjusted according to described target TA value, realize uplink synchronous with the base station.
A kind of communication system comprises:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence comprises Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, and described TA value is sent to subscriber equipment;
After described subscriber equipment obtains described TA value, described TA value is deducted predetermined value obtain target TA value, inclined to one side when adjusting according to described target TA value, realize uplink synchronous with the base station.
A kind of user terminal comprises:
Access lead sequence transmitting element is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Timing alignment value receiving element is used to receive the timing alignment TA value that network side sends, and described TA value is that the described access lead sequence of network side foundation calculates after relevant with its local sequence;
Timing alignment value processing unit is used for that described TA value is deducted predetermined value and obtains target TA value;
The time offset whole unit, inclined to one side when being used for adjusting according to described target TA value, realize synchronous with network side
From above-mentioned technical scheme as can be seen, compared with prior art, the embodiment of the invention is by deducting predetermined value with the TA value, make the data that originally may the arrive eNodeB in advance transmission that lagged behind, thereby the data that reduce the UE transmission arrive the probability of eNodeB in advance, reduce the probability that causes intersymbol interference, and then reduce the error rate.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do simple the introduction to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of preamble sequence;
The flow chart of a kind of Random Access Channel detection method that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is that the OFDM symbol is leading, punctual and lag behind and arrive the schematic diagram of eNodeB;
Fig. 4 is in the embodiment of the invention, and the time of hysteresis, OFDM arrived the schematic diagram of eNodeB when being the maximum duration that allows;
A kind of method flow diagram of realizing uplink synchronous that Fig. 5 provides for the embodiment of the invention;
The structural representation of a kind of base station that Fig. 6 provides for the embodiment of the invention;
The structural representation of a kind of user terminal that Fig. 7 provides for the embodiment of the invention;
A kind of long evolving system up link detection method basic procedure schematic diagram that Fig. 8 provides for the embodiment of the invention;
A kind of long evolving system uplink synchronisation method basic procedure schematic diagram that Fig. 9 provides for the embodiment of the invention;
A kind of base station basic logical structure schematic diagram that Figure 10 provides for the embodiment of the invention;
A kind of terminal basic logical structure schematic diagram that Figure 11 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of RACH detection method, uplink synchronisation method, device and system, arrives eNodeB in advance and causes intersymbol interference with the data of avoiding UE to send.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Please refer to Fig. 2, the flow chart of a kind of Random Access Channel detection method that provides for the embodiment of the invention may further comprise the steps:
Step S21, will carry out relevant with local sequence from the Preamble sequence of UE.
Receive the Preamble sequence that UE sends, described Preamble sequence is that described UE selects in the sequence family of sub-district according to demand at random.
Step S22, the relevant correlation peak that obtains of basis calculate RTD (Round Trip Delay, round-trip delay), and calculate the TA value.
Specifically how to calculate RTD and TA value, the mode that can adopt prior art to provide no longer describes in detail herein.
Step S23, described TA value is deducted predetermined value obtain target TA value, and described target TA value is sent to described UE.
Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation.
Described target TA value is described UE inclined to one side benchmark when adjusting, and is inclined to one side when UE utilizes described target TA value to adjust, realize and eNodeB between uplink synchronous, on this basis to eNodeB transmission data.
Need to prove, the value of TA described in the above-mentioned steps S22 obtains according to the TA algorithm, there is certain error X in its general and actual value, and the scope of X is determined, be (Δ TA, Δ TA) that wherein Δ TA is the minimum particle size of TA signaling, generally according to the multipath tolerance of eNodeB receiver, TA signaling and time overhead are determined.
If X is in (Δ TA, 0) interval, the data that UE sends lag behind and arrive eNodeB, and as shown in Figure 3, timing base so carries out comprising current sign and cyclic shift sample value thereof in the OFDM window of fast fourier transform integration just in the CP scope, can not cause ISI; And if X is in (0, Δ TA) when interval, the OFDM symbol arrives eNodeB in advance, timing base has surpassed the scope of CP, has then both comprised the part sample value of current OFDM symbol in the FFT integration window, comprises the part sample value of next OFDM symbol CP again, can cause ISI like this, cause the error rate to increase.
Therefore, present embodiment is after the foundation algorithm obtains the TA value, this TA value is deducted predetermined value, this predetermined value is more than or equal to Δ TA, as long as concrete numerical value meets the following conditions: when sending afterwards data symbol arrival eNodeB when UE based target TA value is adjusted partially, the left margin that eNodeB obtains the OFDM window of symbol is in the CP scope of described symbol.In other words, the data symbol that UE is sent is punctual or hysteresis certain hour arrival eNodeB gets final product.
Suppose that the maximum duration that lags behind is T1, when then the data symbol of UE transmission arrived eNodeB, the left margin of the OFDM window that obtains symbol of eNodeB was in the CP of current data symbol and the separation of previous data symbol, as shown in Figure 4.
Be that Δ TA example describes below with the predetermined value:
The error X that exists between TA value that obtains according to algorithm and the actual TA value is (Δ TA, Δ TA) any one numerical value between, after deducting Δ TA, difference range between target TA value that obtains and the actual TA value is (2 Δ TA, 0), guaranteed originally to be in described (0 thereby make, Δ TA) interval may arrive the data of eNodeB in advance can be on time or lag behind and arrive, assurance carries out only comprising in the OFDM window of FFT integration the sample value of an OFDM symbol, therefore can not cause intersymbol crosstalking, reduce the error rate.
The embodiment of the invention also discloses the another kind of method that realizes uplink synchronous, in described method, eNodeB sends to UE after calculating the TA value, after UE gets access to described TA value, described TA value is deducted predetermined value, with the uplink synchronous of realization with eNodeB.Detailed process may further comprise the steps as shown in Figure 5:
Step S51, send the Preamble sequence to eNodeB.
UE selects a Preamble sequence as required at random in the sequence family of sub-district, send to described eNodeB through processing and after adding CP.
Step S52, receive the TA value that described eNodeB returns after to described Preamble series processing.
ENodeB receives described Preamble sequence, removes CP wherein, and relevant with local sequence after handling, the correlation peak that obtains according to correlated results calculates a RTD value, and calculates corresponding TA value thus, sends to UE by the TA signaling then.
Step S53, described TA value is deducted predetermined value, obtain target TA value.
Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation, and this predetermined value associated description can be with reference to the content of preamble Random Access Channel detection method part.
Step S54, inclined to one side when utilizing described target TA value to adjust realizes the uplink synchronous with eNodeB.
After the adjustment, can think and realize that with eNodeB synchronously, follow-up data can send on this basis.
Need to prove that in other embodiments, eNodeB also can deduct described predetermined value with this TA value after calculating the TA value, send to UE in the result that will obtain then.That is to say, this TA value can be defined as target TA value after the TA value that UE gets access to, and inclined to one side during according to described target TA value adjustment, the uplink synchronous of realization and eNodeB.
As can be seen, the embodiment of the invention deducts a tentation data on the basis of original TA value (i.e. the TA value that directly calculates according to the RTD value), thereby can change UE TA the time be the situation that 0 data that send to the time interval between the predetermined value arrive eNodeB in advance partially, the data that reduce the UE transmission on the whole arrive the probability of eNodeB in advance, thereby reduce the probability that causes intersymbol interference, reduce the error rate.
The embodiment of the invention discloses a kind of base station, the structure of this base station comprises as shown in Figure 6: correlation unit 61, first computing unit 62, second computing unit 63 and transmitting element 64.
Wherein:
Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation, and this predetermined value associated description can be with reference to the content of preamble Random Access Channel detection method part.
Described target TA value is a described UE inclined to one side benchmark when adjusting, and inclined to one side in the time of can adjusting according to described target TA value after UE obtains this target TA value, follow-up all is to carry out on the basis of adjustment to eNodeB transmission data.
The disclosed Random Access Channel checkout gear of the embodiment of the invention can be arranged on the eNodeB, make this eNodeB have the function of adjusting the TA value, make local timing equal or be ahead of the timing (also being the punctual or arrival eNodeB that lags behind of data that UE sends) of UE, thereby the data of having avoided UE to send arrive eNodeB in advance, and then guarantee to carry out to comprise in the OFDM window of FFT integration a kind of sample value of symbol, therefore can not cause intersymbol crosstalking, reduce the error rate.
Need to prove that the eNodeB that comprises described Random Access Channel checkout gear belongs to protection category of the present invention equally.The embodiment of the invention also provides a kind of terminal, and its structure comprises as shown in Figure 7: Random Access Channel sequence transmitting element 71, timing alignment value receiving element 72, timing alignment value processing unit 73 and adjustment unit 74.
Wherein:
Random Access Channel sequence transmitting element 71 is used to send the Preamble sequence.
Timing alignment value receiving element 72 is used to receive the timing alignment TA value that eNodeB sends.Described TA value calculates after to be eNodeB according to described Preamble sequence relevant with its local sequence, its computational process is: eNodeB receives described Preamble sequence, remove CP wherein, it is relevant with local sequence to handle the back, the correlation peak that obtains according to correlated results calculates a RTD value, and calculate corresponding TA value thus, send to UE by the TA signaling then.
Timing alignment value processing unit 73 is used for that described TA value is deducted predetermined value and obtains target TA value.Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation, and this predetermined value associated description can be with reference to the content of preamble Random Access Channel detection method part.
The time offset whole unit 74.Inclined to one side when being used for adjusting according to described target TA value, realize synchronous with eNodeB.
The embodiment of the invention can be arranged on the UE, makes this UE can adjust the TA value, realizes the uplink synchronous with eNodeB.Need to prove, " synchronously " described herein refers to synchronous relatively, in fact, through after the above-mentioned adjustment, UE and eNodeB might not be absolute synchronization still, but the data that can reduce the UE transmission at least arrive the probability of eNodeB in advance, thereby reduce the probability that causes intersymbol interference, reduce the error rate.
Need to prove that the UE with device of described realization uplink synchronous belongs to protection category of the present invention equally.
In addition, the embodiment of the invention also discloses a kind of communication system, comprises eNodeB and UE, wherein:
ENodeB is used for: will carry out relevant with local sequence from the Preamble sequence of UE, calculate RTD according to the relevant correlation peak that obtains, after calculating timing alignment TA value according to this, described TA value is deducted predetermined value obtain target TA value, and described target TA value is sent.
UE, inclined to one side when being used for adjusting according to described target TA value, realize uplink synchronous with eNodeB.
Concrete, the concrete structure of eNodeB can be identical with structure shown in Figure 6 or similar.In addition, the embodiment of the invention also discloses another kind of communication system, comprises eNodeB and UE, wherein:
ENodeB is used for: will carry out relevantly from the Preamble sequence of UE and local sequence, calculate RTD according to the relevant correlation peak that obtains, calculate timing alignment TA value according to this after, send to UE.
UE is used for: after obtaining described TA value, described TA value deducted predetermined value obtains target TA value, and inclined to one side when adjusting according to described target TA value, realize uplink synchronous with eNodeB.
Concrete, the concrete structure of UE can be identical with structure shown in Figure 7 or similar.
See also Fig. 8, a kind of long evolving system up link detection method basic procedure schematic diagram that the embodiment of the invention provides.Embodiment illustrated in fig. 8 removing is applicable to Random Access Channel (PRACH, PhysicalRandom Access Channel) outside the sequence (embodiment as shown in Figure 2), can also be applicable to other access lead sequences, for example, Physical Uplink Shared Channel (PUSCH, Physical Uplink SharedChannel) sequence or monitoring reference signal (SRS, Sounding Reference Signal) sequence, its basic procedure comprises:
Step S81 receives the access lead sequence from UE, and described access lead sequence and local sequence is carried out relevant, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitoring reference signal sequence.
Step S82 calculates round-trip delay RTD according to the relevant correlation peak that obtains, and calculates timing alignment TA value.
Step S83 deducts predetermined value with described TA value and obtains target TA value, and it is inclined to one side when adjusting by the TA signaling described target TA value to be sent to described UE.
In the present embodiment, predetermined value can be the minimum particle size Δ TA of TA signaling.
Consider the various uncertain factors of wireless channel, the error X of the TA value that obtains according to the TA algorithm among the above-mentioned steps S82 and actual timing alignment TA ' value may add a minimum particle size Δ of less than TA for several minimum particle size Δ TA or several minimum particle size Δs TA, promptly, the error X of the timing alignment TA ' value of TA value and reality is at (Δ TA, Δ TA) outside, for example, X may be 2 * Δ TA or 2.7 * Δ TA, then need according to the access lead sequence that receives recomputate TA value until the error X of the timing alignment TA ' value of TA value that calculates and reality within (Δ TA, Δ TA).
Therefore, for the uncertain factor of eliminating above-mentioned wireless channel bring than mistake, in the embodiment shown in fig. 8, if the difference of the timing alignment TA ' value of described timing alignment TA value that calculates and reality is at (Δ TA, Δ TA) outside, then describedly described TA value deducted predetermined value obtain target TA value, and by the TA signaling described target TA value is sent to described UE and comprise partially when adjusting:
The access lead sequence that step 1), basis are received is calculated described timing alignment TA value;
Step 2), described timing alignment TA value is sent to described subscriber equipment so that subscriber equipment is adjusted the delivery time of business datum according to described timing alignment value;
Step 3), repeat abovementioned steps 1) and 2), until the difference of the timing alignment TA ' that calculates gained timing alignment TA value and reality within (Δ TA, Δ TA);
Step 4), step 3) is calculated gained timing alignment TA value deduct predetermined value and obtain target TA value, and it is inclined to one side when adjusting by the TA signaling described target TA value to be sent to described UE.
See also Fig. 9, a kind of long evolving system uplink synchronisation method basic procedure schematic diagram that the embodiment of the invention provides.Embodiment illustrated in fig. 9 removing is applicable to Random Access Channel (PRACH, Physical RandomAccess Channel) outside the sequence (embodiment as shown in Figure 6), can also be applicable to other access lead sequences, for example, Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) sequence or monitoring reference signal (SRS, Sounding Reference Signal) sequence, its basic procedure comprises:
Step S91 sends the access lead sequence to network side, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence.
Step S92 receives the TA value that described network side returns after to described access lead series processing.
Network side receives described access lead sequence, removes CP wherein, and relevant with local sequence after handling, the correlation peak that obtains according to correlated results calculates a RTD value, and calculates corresponding TA value thus, sends to UE by the TA signaling then.
Step S93, described TA value is deducted predetermined value, obtain target TA value.
Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation, and this predetermined value associated description can be with reference to the content of preamble Random Access Channel detection method part.
Step S94, inclined to one side when utilizing described target TA value to adjust realizes the uplink synchronous with eNodeB.
After the adjustment, can think and realize that with eNodeB synchronously, follow-up data can send on this basis.
See also Figure 10, a kind of base station basic logical structure schematic diagram that the embodiment of the invention provides, this base station is removed and is applicable to processing Random Access Channel (PRACH, Physical Random Access Channel) outside the sequence, also be applicable to and handle other access lead sequences, for example, Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) sequence or monitoring reference signal (SRS, Sounding Reference Signal) sequence, base station embodiment illustrated in fig. 10 comprises:
Described predetermined value draws according to test statistics, and can adjust according to the network practical operation situation, and this predetermined value associated description can be with reference to the content of preamble Random Access Channel detection method part.
Transmitting element 104 is used for described target TA value is sent to described UE, and described target TA value is a described UE inclined to one side benchmark when adjusting.
Described target TA value is a described UE inclined to one side benchmark when adjusting, and inclined to one side in the time of can adjusting according to described target TA value after UE obtains this target TA value, follow-up all is to carry out on the basis of adjustment to eNodeB transmission data.
In the present embodiment, described predetermined value can be the minimum particle size Δ TA of TA signaling, and described correlation unit 101 can be Random Access Channel sequence correlation unit, is used for carrying out relevant with local sequence the Random Access Channel sequence from UE.
Consider the various uncertain factors of wireless channel, the error X of the TA value that above-mentioned first computing unit 102 obtains according to the TA algorithm and actual timing alignment TA ' value may add a minimum particle size Δ of less than TA for several minimum particle size Δ TA or several minimum particle size Δs TA, promptly, the error X of the timing alignment TA ' value of TA value and reality is at (Δ TA, Δ TA) outside, for example, X may be 2 * Δ TA or 2.7 * Δ TA, then need according to the access lead sequence that receives recomputate TA value until the error X of the timing alignment TA ' value of TA value that calculates and reality within (Δ TA, Δ TA).
In other words, for the uncertain factor of eliminating above-mentioned wireless channel bring than mistake, in the embodiment shown in fig. 10, if the difference of the timing alignment TA ' value of timing alignment TA value that described first computing unit 102 calculates and reality is at (Δ TA, Δ TA) outside, then described base station further comprises:
Correcting unit 105, the difference that is used for calculating gained timing alignment TA values and the timing alignment TA ' value of reality at described first computing unit 102 are outside (Δ TA, Δ TA) time:
1), calculates described timing alignment TA value according to the access lead sequence of receiving;
2), described timing alignment TA value is sent to described subscriber equipment so that subscriber equipment is adjusted the delivery time of business datum according to described timing alignment value;
3), repeat aforementioned 1) and 2), until the difference of calculating gained timing alignment TA value and the timing alignment TA ' of reality within (Δ TA, Δ TA);
4), with 3) calculate gained timing alignment TA value and deduct predetermined value and obtain target TA value, and inclined to one side when described target TA value being sent to described UE in order to adjustment by the TA signaling.
The disclosed access lead sequence detecting apparatus of the embodiment of the invention can be arranged on the eNodeB, make this eNodeB have the function of adjusting the TA value, make local timing equal or be ahead of the timing (also being the punctual or arrival eNodeB that lags behind of data that UE sends) of UE, thereby the data of having avoided UE to send arrive eNodeB in advance, and then guarantee to carry out to comprise in the OFDM window of FFT integration a kind of sample value of symbol, therefore can not cause intersymbol crosstalking, reduce the error rate.
Need to prove that the eNodeB that comprises described access lead sequence detecting apparatus belongs to protection category of the present invention equally.
The another kind of terminal basic logical structure schematic diagram that the embodiment of the invention provides as shown in figure 11, it comprises:
Access lead sequence transmitting element 111 is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Timing alignment value receiving element 112 is used to receive the timing alignment TA value that network side sends, and described TA value is that the described access lead sequence of network side foundation calculates after relevant with its local sequence;
Timing alignment value processing unit 113 is used for that described TA value is deducted predetermined value and obtains target TA value;
The time offset whole unit 114, inclined to one side when being used for adjusting according to described target TA value, realize synchronous with network side.
In the present embodiment, described access lead sequence transmitting element 111 is to be used to send the Random Access Channel sequence for Random Access Channel sequence transmitting element; Described timing alignment value receiving element 112 can be Random Access Channel sequence timing alignment value receiving element, be used to receive the timing alignment TA value that network side sends, described TA value is that the described Random Access Channel sequence of network side foundation calculates after relevant with its local sequence.
The embodiment of the invention discloses another kind of communication system, and it comprises:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, described TA value is deducted predetermined value obtain target TA value, and described target TA value is sent to subscriber equipment;
Inclined to one side when described subscriber equipment is adjusted according to described target TA value, realize uplink synchronous with the base station.
Described base station comprises:
Correlation unit is used for carrying out relevant with local sequence the access lead sequence from UE;
First computing unit calculates round-trip delay RTD according to the relevant correlation peak that obtains, and calculates timing alignment TA value;
Second computing unit deducts predetermined value with described TA value and obtains target TA value;
Transmitting element is used for described target TA value is sent to described UE, and described target TA value is a described UE inclined to one side benchmark when adjusting.
In the present embodiment, described correlation unit can be Random Access Channel sequence correlation unit, is used for carrying out relevant with local sequence the Random Access Channel sequence from UE; Described subscriber equipment can be used to send the Random Access Channel sequence for Random Access Channel sequence transmitting apparatus.
Disclosed another communication system of the embodiment of the invention comprises:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence comprises Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, and described TA value is sent to subscriber equipment;
After described subscriber equipment obtains described TA value, described TA value is deducted predetermined value obtain target TA value, inclined to one side when adjusting according to described target TA value, realize uplink synchronous with the base station.
Described subscriber equipment comprises:
Access lead sequence transmitting element is used to send the access lead sequence;
Timing alignment value receiving element is used to receive the timing alignment TA value that network side sends;
Timing alignment value processing unit is used for that described TA value is deducted predetermined value and obtains target TA value;
The time offset whole unit, inclined to one side when being used for adjusting according to described target TA value, realize synchronous with network side.
In the present embodiment, described access lead sequence transmitting element can be used to send the Random Access Channel sequence for Random Access Channel sequence transmitting element.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
It will be understood by those skilled in the art that and to use many different technologies and in the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
The professional can also further recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, described program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (17)
1. a long evolving system up link detection method is characterized in that, comprising:
Reception is from the access lead sequence of UE, and described access lead sequence and local sequence carried out relevant, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Calculate round-trip delay RTD according to the relevant correlation peak that obtains, and calculate timing alignment TA value;
Described TA value is deducted predetermined value obtain target TA value, and it is inclined to one side when adjusting by the TA signaling described target TA value to be sent to described UE.
2. method according to claim 1 is characterized in that, described predetermined value is the minimum particle size Δ TA of TA signaling.
3. method according to claim 2, it is characterized in that, if the difference of the timing alignment TA ' value of described timing alignment TA value that calculates and reality is at (Δ TA, Δ TA) outside, then describedly described TA value deducted predetermined value obtain target TA value, and by the TA signaling described target TA value is sent to described UE and comprise partially when adjusting:
The access lead sequence that step 1), basis are received is calculated described timing alignment TA value;
Step 2), described timing alignment TA value is sent to described subscriber equipment so that subscriber equipment is adjusted the delivery time of business datum according to described timing alignment value;
Step 3), repeat abovementioned steps 1) and 2), until the difference of the timing alignment TA ' that calculates gained timing alignment TA value and reality within (Δ TA, Δ TA);
Step 4), step 3) is calculated gained timing alignment TA value deduct predetermined value and obtain target TA value, and it is inclined to one side when adjusting by the TA signaling described target TA value to be sent to described UE.
4. a long evolving system uplink synchronisation method is characterized in that, comprising:
Send the access lead sequence to network side, described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Receive the TA signaling that comprises timing alignment TA value that network side sends, described TA value is that the described access lead sequence of network side foundation calculates after relevant with its local sequence;
Described TA value is deducted predetermined value obtain target TA value, and inclined to one side when adjusting, realize synchronous with network side according to described target TA value.
5. a base station is characterized in that, comprising:
Correlation unit is used for carrying out from the access lead sequence of UE and local sequence relevantly, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
First computing unit calculates round-trip delay RTD according to the relevant correlation peak that obtains, and calculates timing alignment TA value;
Second computing unit deducts predetermined value with described TA value and obtains target TA value;
Transmitting element is used for described target TA value is sent to described UE, and described target TA value is a described UE inclined to one side benchmark when adjusting.
6. base station as claimed in claim 5 is characterized in that, described predetermined value is the minimum particle size Δ TA of TA signaling.
7. base station as claimed in claim 6 is characterized in that, described base station further comprises:
Correcting unit, the difference that is used for calculating gained timing alignment TA value and the timing alignment TA ' value of reality at described first computing unit are outside (Δ TA, Δ TA) time:
1), calculates described timing alignment TA value according to the access lead sequence of receiving;
2), described timing alignment TA value is sent to described subscriber equipment so that subscriber equipment is adjusted the delivery time of business datum according to described timing alignment value;
3), repeat aforementioned 1) and 2), until the difference of calculating gained timing alignment TA value and the timing alignment TA ' of reality within (Δ TA, Δ TA);
4), with 3) calculate gained timing alignment TA value and deduct predetermined value and obtain target TA value, and inclined to one side when described target TA value being sent to described UE in order to adjustment by the TA signaling.
8. base station as claimed in claim 5 is characterized in that, described correlation unit is a Random Access Channel sequence correlation unit, is used for carrying out relevant with local sequence the Random Access Channel sequence from UE.
9. a communication system is characterized in that, comprising:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, described TA value is deducted predetermined value obtain target TA value, and described target TA value is sent to subscriber equipment;
Inclined to one side when described subscriber equipment is adjusted according to described target TA value, realize uplink synchronous with the base station.
10. communication system as claimed in claim 9 is characterized in that, described base station comprises:
Correlation unit is used for carrying out relevant with local sequence the access lead sequence from UE;
First computing unit calculates round-trip delay RTD according to the relevant correlation peak that obtains, and calculates timing alignment TA value;
Second computing unit deducts predetermined value with described TA value and obtains target TA value;
Transmitting element is used for described target TA value is sent to described UE, and described target TA value is a described UE inclined to one side benchmark when adjusting.
11. communication system as claimed in claim 10 is characterized in that, described correlation unit is a Random Access Channel sequence correlation unit, is used for carrying out relevant with local sequence the Random Access Channel sequence from UE.
12. communication system as claimed in claim 9 is characterized in that, described subscriber equipment is a Random Access Channel sequence transmitting apparatus, is used to send the Random Access Channel sequence.
13. a communication system is characterized in that, comprising:
Subscriber equipment is used to send the access lead sequence, and described access lead sequence comprises Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
The base station is used for carrying out from the access lead sequence of UE and local sequence relevantly, and calculates round-trip delay RTD and timing alignment TA value, and described TA value is sent to subscriber equipment;
After described subscriber equipment obtains described TA value, described TA value is deducted predetermined value obtain target TA value, inclined to one side when adjusting according to described target TA value, realize uplink synchronous with the base station.
14. communication system as claimed in claim 13 is characterized in that, described subscriber equipment comprises:
Access lead sequence transmitting element is used to send the access lead sequence;
Timing alignment value receiving element is used to receive the timing alignment TA value that network side sends;
Timing alignment value processing unit is used for that described TA value is deducted predetermined value and obtains target TA value;
The time offset whole unit, inclined to one side when being used for adjusting according to described target TA value, realize synchronous with network side.
15. communication system as claimed in claim 14 is characterized in that, described access lead sequence transmitting element is a Random Access Channel sequence transmitting element, is used to send the Random Access Channel sequence.
16. a user terminal is characterized in that, comprising:
Access lead sequence transmitting element is used to send the access lead sequence, and described access lead sequence is Random Access Channel sequence, Physical Uplink Shared Channel sequence or monitors reference signal sequence;
Timing alignment value receiving element is used to receive the timing alignment TA value that network side sends, and described TA value is that the described access lead sequence of network side foundation calculates after relevant with its local sequence;
Timing alignment value processing unit is used for that described TA value is deducted predetermined value and obtains target TA value;
The time offset whole unit, inclined to one side when being used for adjusting according to described target TA value, realize synchronous with network side.
17., it is characterized in that described access lead sequence transmitting element is a Random Access Channel sequence transmitting element, is used to send the Random Access Channel sequence as user terminal as described in the claim 16;
Described timing alignment value receiving element is a Random Access Channel sequence timing alignment value receiving element, be used to receive the timing alignment TA value that network side sends, described TA value is that the described Random Access Channel sequence of network side foundation calculates after relevant with its local sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910161968 CN101854646B (en) | 2008-12-31 | 2009-09-10 | LTE uplink detection method, as well as uplink synchronization method, device and system |
| PCT/CN2009/076124 WO2010075758A1 (en) | 2008-12-31 | 2009-12-28 | Uplink detection method, uplink synchronization method for lte, apparatus and system thereof |
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| CN200810186598 | 2008-12-31 | ||
| CN200810186598.2 | 2008-12-31 | ||
| CN 200910161968 CN101854646B (en) | 2008-12-31 | 2009-09-10 | LTE uplink detection method, as well as uplink synchronization method, device and system |
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| CN101854646B CN101854646B (en) | 2013-04-24 |
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| WO (1) | WO2010075758A1 (en) |
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| WO2011140875A1 (en) * | 2010-05-13 | 2011-11-17 | 中兴通讯股份有限公司 | Method and apparatus for implementing uplink synchronization in mobile communication system |
| WO2012109929A1 (en) * | 2011-02-17 | 2012-08-23 | 中兴通讯股份有限公司 | Lte time advance adjusting method and base station |
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| WO2007075559A2 (en) * | 2005-12-22 | 2007-07-05 | Interdigital Technology Corporation | Method and system for adjusting uplink transmission timing for long term evolution handover |
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| CN101572577B (en) * | 2008-04-30 | 2012-11-28 | 电信科学技术研究院 | Method and device for achieving timing advance of uplink transmission |
| CN101594705B (en) * | 2008-05-30 | 2011-02-09 | 展讯通信（上海）有限公司 | Timing adjusting method and base station of time division duplex system |
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| WO2013020443A1 (en) * | 2011-08-09 | 2013-02-14 | 华为技术有限公司 | Secondary cell random access method and device |
| CN104254100A (en) * | 2013-06-25 | 2014-12-31 | 普天信息技术研究院有限公司 | Uplink timing advance measuring method |
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| CN110167130A (en) * | 2018-02-13 | 2019-08-23 | 华为技术有限公司 | A kind of transmission method and device of temporal information |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2010075758A1 (en) | 2010-07-08 |
| CN101854646B (en) | 2013-04-24 |
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