CN104080159B - Carrier wave sends time setting method and communication system - Google Patents
Carrier wave sends time setting method and communication system Download PDFInfo
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- CN104080159B CN104080159B CN201310101126.3A CN201310101126A CN104080159B CN 104080159 B CN104080159 B CN 104080159B CN 201310101126 A CN201310101126 A CN 201310101126A CN 104080159 B CN104080159 B CN 104080159B
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Abstract
Time setting method and communication system are sent the invention discloses a kind of carrier wave, base station is calculated according to the Timing Advance of each each carrier wave of terminal respectively and is directed to the timing information that each carrier wave is sent, and according to this timing information, on the basis of one of component carrier, calculate the Timing Advance time difference of other component carriers therewith, and then the transmission time of each carrier wave is determined according to Timing Advance of the different terminals on different carrier waves, to ensure that the maximum time difference between all terminals are received in cell each carrier signal meets TAE requirement and corresponding demodulation performance.
Description
Technical field
The present invention relates to the communications field, and in particular to a kind of carrier wave sends time setting method and communication system.
Background technology
The RF index TAE of base station（Time Alignment Error, time synchronization error）It is the difference that base station is sent
Signal branch reaches the time difference thresholding of same terminal.If the different branch signal reaching time-differences that terminal is received are more than
TAE, then demodulation performance can drop to not receivable degree, it is on the contrary then demodulation performance is had not significant impact.So, how to protect
Each signal branch arrival time difference of terminal reception is demonstrate,proved within TAE, is the key for ensureing terminal demodulation performance.
According to research display：When the different carrier waves of terminal-pair use same TAG（Send lead group）When, 260ns is set
TAE can ensure the demodulation performance of terminal；When the different carrier waves of terminal-pair use two or more TAG, set 1300ns's
TAE can ensure the demodulation performance of terminal.
In base station radio-frequency performance specification TS36.104, the definition for TAE is broadly divided into several classes：
1. for multiple antennas and transmission diversity technology, the TAE on each carrier wave can not be more than 65ns；
2. for polymerizeing with interior continuous carrier, multiple antennas and transmission diversity technology are not used, TAE can not be more than 130ns；
3. for polymerizeing with interior discontinuous carrier, multiple antennas and transmission diversity technology are not used, TAE can not be more than 260ns；
4. for interband carrier aggregation, multiple antennas and transmission diversity technology are not used, TAE can not be more than 1300ns.
As can be seen that for different carrier aggregation scenes, 3GPP specifications different TAE values ensure the demodulation of terminal
Performance.The current terminal MTA carried out in 3GPP RAN2Rel-11（Many times send lead）Problem, is defined in some fields
Terminal needs to send different branch informations using different Timing Advances in scape, to ensure that each branch information is reached simultaneously
Base station is simultaneously received, demodulated.These branches are probably different carrier waves in carrier aggregation scene, it is also possible to by relay base station or
RRH（RF remote）The different propagation paths caused.When different carrier waves, relay base station or the different paths of RRH are adopted in carrier aggregation
During with different TAG, illustrate there is obvious propagation time difference between multiple carrier waves or multiple paths.If according to existing
Technology base station sends different carrier waves in synchronization, and this time difference may produce obvious to the demodulation performance of terminal
Negative effect.The carrier wave of multiple TAG in the problem both may be from different frequency ranges（Interband carrier aggregation）It may also come from
Same frequency range（Intralband carrier aggregation）.If defining method according to current TAE, the TAE of intralband carrier aggregation is defined as
130ns.According to 3GPP specifications, a TA step-length is 520ns.When two carrier waves of intralband carrier aggregation use different TAG, two
The terminal of individual carrier wave sends lead and at least differs 520ns.It is round-trip delay according to defining TA to be（Round Trip Time）,
The difference that base station sends two carrier waves is not less than 520ns/2=260ns, and usual base station sends different carrier waves simultaneously, then terminal connects
The difference of two carrier waves received is not less than 260ns, it is impossible to meet TAE demand.
In addition, 3GPP is determined in descending support RRH and the carrier aggregation of relay base station scene, according to RAN2 research knot
Really, for the two scenes, either intralband carrier aggregation or interband carrier aggregation, are required for supporting multiple uplink clocks to carry
Before, that is, need terminal to set different TAG for different component carriers.Now, the 3rd of TAE specifications is directed in TS36.104
Point just occurs when terminal uses different TAG, can not meet TAE demand.
It can be seen that, the requirement that set of time is not well positioned to meet TAE is sent to each carrier wave using prior art.
The content of the invention
The main technical problem to be solved in the present invention is to provide a kind of carrier wave and sends time setting method and communication system,
Time synchronization error TAE requirement and corresponding demodulation can not be met very well by solving the existing set of time mode that sent to each carrier wave
The problem of performance.
In order to solve the above technical problems, the present invention, which provides a kind of carrier wave, sends time setting method, including：
Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij；I=1 ... ..., n, the n be more than
Integer equal to 2；J=1 ... ..., m, the m is the integer more than or equal to 2；
From the carrier wave C1... ..., CmOne carrier wave C of middle selectionkAs reference carrier, the terminal AiIn the carrier wave Ck
On Timing Advance TAikOn the basis of Timing Advance；
By the TAijWith the TAikSubtract each other, obtain Timing Advance difference DELTA TAi(k-j), the j is not equal to the k；
Based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., CmThe transmission time.
In an embodiment of the present invention, the carrier wave CjIt is the terminal A for control base stationiThe carrier wave of offer；It is described
Based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., CmThe transmission time include：
By Δ TA1(k-j)... ..., Δ TAn(k-j)It is added obtained value divided by n obtains the class average value of Timing Advance difference
ΔT(k-j)；
Class average value Δ T based on the Timing Advance difference(k-j)The carrier wave C is set1... ..., CmTransmission when
Between.
In an embodiment of the present invention, m=2, the carrier wave C1It is the terminal A for control base stationiThere is provided
Carrier wave, the carrier wave C2It is the terminal A for relay base stationiThe carrier wave of offer；
It is described to be based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., CmThe transmission time bag
Include：
Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationiz；
By the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1z..., TTnzIt is added obtained value divided by n is obtained
To the class average value Δ T of Timing Advance difference(k-j)；
Class average value Δ T based on the Timing Advance difference(k-j)Value sets the carrier wave C1... ..., CmTransmission
Time.
In an embodiment of the present invention, m=2, the carrier wave C1It is the terminal A for control base stationiThere is provided
Carrier wave, the carrier wave C2It is the terminal A for RF remoteiThe carrier wave of offer；
It is described to be based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., CmThe transmission time bag
Include：
Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationir；
By the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1r..., TTnrIt is added obtained value divided by n is obtained
To the class average value Δ T of Timing Advance difference(k-j)；
Class average value Δ T based on the Timing Advance difference(k-j)Value sets the carrier wave C1... ..., CmTransmission
Time.
In an embodiment of the present invention, the terminal A where the acquisition base station in celliIn carrier wave CjOn time
Lead TAijSpecially：
Pass through terminal AiIn carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij。
In an embodiment of the present invention, the class average value Δ T based on the Timing Advance difference(k-j)Value is set
Put the carrier wave C1... ..., CmThe transmission time include：
Reference carrier C is setkTransmission time Tk；
Judge the class average value Δ T of the Timing Advance difference(k-j)Whether 0, in this way, then carrier wave C are more than or equal tojHair
Send time Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
In an embodiment of the present invention, the carrier wave CjFor the different carrier waves in polymerizeing with interior continuous carrier, or band
Different carrier waves in interior discontinuous carrier polymerization, or the different carrier waves in the polymerization of interband continuous carrier.
In order to solve the above problems, present invention also offers a kind of communication system, including the end in control base station and cell
Hold Ai；I=1 ... ..., n, the n is the integer more than or equal to 2；The control base station includes Timing Advance and obtains mould
Block, reference carrier selecting module, Timing Advance difference acquisition module and carrier wave send set of time module,
The Timing Advance acquisition module is used to obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij；
J=1 ... ..., m, the m is the integer more than or equal to 2；
The reference carrier selecting module is used for from the carrier wave C1... ..., CmOne carrier wave C of middle selectionkCarried as benchmark
Ripple, the terminal AiIn the carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；
The Timing Advance difference acquisition module is used for the TAijWith the TAikSubtract each other, obtain Timing Advance
Difference DELTA TAi(k-j), the j is not equal to the k；
Carrier wave, which sends set of time module, to be used to be based on the Timing Advance difference DELTA TAi(k-j)The carrier wave is set
C1... ..., CmThe transmission time.
In an embodiment of the present invention, the carrier wave CjIt is the terminal A for the control base stationiThe carrier wave of offer；
The carrier wave sends set of time module and is based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., Cm's
The transmission time includes：
The carrier wave sends set of time module by Δ TA1(k-j)... ..., Δ TAn(k-j)It is added obtained value divided by n is obtained
The class average value Δ T of Timing Advance difference(k-j)；
The carrier wave sends class average value Δ T of the set of time module based on the Timing Advance difference(k-j)Institute is set
State carrier wave C1... ..., CmThe transmission time.
In an embodiment of the present invention, m=2, the carrier wave C1It is the terminal A for the control base stationiCarry
The carrier wave of confession, the carrier wave C2It is the terminal A for relay base stationiThe carrier wave of offer；
The carrier wave sends set of time module and is based on the Timing Advance difference DELTA TAi(k-j)The carrier wave is set
C1... ..., CmThe transmission time include：
The carrier wave sends set of time module and obtains terminal AiCorrespondence control base station to relay base station downlink transfer when
Between TTiz；
The carrier wave sends set of time module by the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1z...,
TTnzIt is added obtained value divided by n obtains the class average value Δ T of Timing Advance difference(k-j)；
The carrier wave sends class average value Δ T of the set of time module based on the Timing Advance difference(k-j)Value is set
The carrier wave C1... ..., CmThe transmission time.
In an embodiment of the present invention, m=2, the carrier wave C1It is the terminal A for the control base stationiCarry
The carrier wave of confession, the carrier wave C2It is the terminal A for RF remoteiThe carrier wave of offer；
The carrier wave sends set of time module and is based on the Timing Advance difference DELTA TAi(k-j)The carrier wave is set
C1... ..., CmThe transmission time include：
The carrier wave sends set of time module and obtains terminal AiCorrespondence control base station to relay base station downlink transfer when
Between TTir；
The carrier wave sends set of time module by the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1r...,
TTnrIt is added obtained value divided by n obtains the class average value Δ T of Timing Advance difference(k-j)；
The carrier wave sends class average value Δ T of the set of time module based on the Timing Advance difference(k-j)Value is set
The carrier wave C1... ..., CmThe transmission time.
In an embodiment of the present invention, the carrier wave sends set of time module and is based on the Timing Advance difference
Class average value Δ T(k-j)Value sets the carrier wave C1... ..., CmThe transmission time include：
The carrier wave sends set of time module and sets reference carrier CkTransmission time Tk；
The carrier wave sends the class average value Δ T that set of time module judges the Timing Advance difference(k-j)It is whether big
In equal to 0, in this way, then carrier wave CjTransmission time Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
The beneficial effects of the invention are as follows：
The carrier wave that the present invention is provided sends time setting method and communication system, by obtaining terminal A in celliCarrying
Ripple CjOn Timing Advance TAij；I=1 ... ..., n, n is the integer more than or equal to 2；J=1 ... ..., m, m is more than or equal to 2
Integer；Then from carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal AiIn carrier wave CkOn time carry
Preceding amount TAikOn the basis of Timing Advance；By TAijWith TAikSubtract each other, obtain Timing Advance difference DELTA TAi(k-j), j is not equal to institute
State k；Based on Timing Advance difference DELTA TAi(k-j)Carrier wave C is set1... ..., CmThe transmission time；That is, the present invention is according to each end
Hold the Timing Advance on each carrier wave to calculate base station respectively and be directed to the timing information that each carrier wave is sent, and during according to this
Sequence information, on the basis of one of component carrier, calculates the Timing Advance time difference of other component carriers therewith, Jin Ergen
The transmission time of each carrier wave is determined according to Timing Advance of the different terminals on different carrier waves, to ensure that all terminals connect in cell
Maximum time difference between each carrier signal received meets TAE requirement and corresponding demodulation performance.
Brief description of the drawings
Fig. 1 is setting carrier wave transmission time flow schematic diagram one in the embodiment of the present invention one；
Fig. 2 is setting carrier wave transmission time flow schematic diagram two in the embodiment of the present invention one；
Fig. 3 is setting carrier wave transmission time flow schematic diagram in the embodiment of the present invention two；
Fig. 4 is setting carrier wave transmission time flow schematic diagram in the embodiment of the present invention three；
Fig. 5 is setting carrier wave transmission time flow schematic diagram in the embodiment of the present invention four；
Fig. 6 is the structural representation of control base station in the embodiment of the present invention five.
Embodiment
The present invention calculates base station according to Timing Advance of each terminal on each carrier wave and sent for each carrier wave respectively
Timing information, and according to this timing information, on the basis of one of component carrier, calculate other component carriers therewith
The Timing Advance time difference, and then when determining the transmission of each carrier wave according to Timing Advance of the different terminals on different carrier waves
Between, to ensure that the maximum time difference between all terminals are received in cell each carrier signal meets TAE requirement and phase
The demodulation performance answered.The present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one：
Shown in Figure 1, the carrier wave that the present embodiment is provided, which sends time setting method, to be included：
Step 101：Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij；Wherein, i=1 ... ...,
N, the n are the integer more than or equal to 2；J=1 ... ..., m, the m is the integer more than or equal to 2；
Step 102：From carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal AiIn carrier wave CkOn
Timing Advance TAikOn the basis of Timing Advance；
Step 103：By institute TAijWith TAikSubtract each other, obtain Timing Advance difference DELTA TAi(k-j), wherein, the j is not equal to
The k；
Step 104：Based on obtained Timing Advance difference DELTA TAi(k-j)Carrier wave C is set1... ..., CmThe transmission time.
In the present embodiment, above-mentioned steps 101 can specifically pass through terminal AiIn carrier wave CjSend the mode of random access procedure
Obtain Timing Advance TAij；Because which has been the disclosed mode of this area, no longer it is repeated herein.
It is shown in Figure 2, in the present embodiment, based on obtained Timing Advance difference DELTA TAi(k-j)Carrier wave is set
C1... ..., CmThe transmission time can specifically further comprise the steps：
Step 1041：Based on obtained lead difference DELTA TAi(k-j)Timing Advance is obtained with reference to specific application scenarios
The class average value Δ T of difference(k-j)；
Step 1042：Class average value Δ T based on obtained Timing Advance difference(k-j)Carrier wave C is set1... ..., Cm's
It is the transmission time, specific as follows：
Reference carrier C is setkTransmission time Tk；
Judge the class average value Δ T of Timing Advance difference(k-j)Whether 0, in this way, then carrier wave C are more than or equal tojTransmission when
Between Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
It should be appreciated that the carrier wave C in the present embodimentjFor the different carrier waves in polymerizeing with interior continuous carrier, or with interior
Different carrier waves in different carrier waves in discontinuous carrier polymerization, or the polymerization of interband continuous carrier.
It can be seen that, the present embodiment is based on each terminal Ai in each carrier wave CjOn Timing Advance calculate base station respectively for each
The timing information that individual carrier wave is sent, and then on the basis of one of component carrier, calculate the time of other component carriers therewith
The lead time difference, the transmission time of each carrier wave is then determined according to Timing Advance of the different terminals on different carrier waves, can
Ensure that the maximum time difference between each carrier signal that all terminals are received in cell meets TAE requirement and corresponding solution
Tonality energy.Separately below by taking several specific application scenarios as an example, the present invention is described further.
Embodiment two：
In the present embodiment, if control base station uses two component carrier C of carrier aggregation1And C2For terminal AiService, its
In, i=1 ... ..., n, the n is the integer more than or equal to 2.That is, in the present embodiment, m=2 in embodiment one, but it should
Understand, be intended merely to be the present invention schematical explanation herein, but the present invention is not limited merely to control base station and is only
Terminal AiTwo carrier waves are provided, that is, a kind of m value of embodiment can be taken as any integer value more than 2.
In order to ensure control base station to terminal Ai（Wherein, i=1 ... ..., n, the n is the integer more than or equal to 2）Send
Two carrier information reaching time-differences meet TAE requirements, Timing Advance is larger（Propagation delay time is larger）Carrier wave send when
Between need to shift to an earlier date.Because different terminals are directed to carrier wave C in control base station serving cell1With carrier wave C2Up transmission time advance
Measure TAi1、TAi2Can be because it be apart from the factors such as base station location and different, i.e. TAi1≠TAi2, it is therefore desirable to consider difference
Up transmission Timing Advance of the terminal on carrier wave C1 and carrier wave C2 is so that it is determined that base station is sent for the carrier wave of different carrier waves
Time.In the present embodiment, if carrier wave C1The transmission time be T1, if carrier wave C2The transmission time be T2；It is shown in Figure 3,
The setting up procedure that carrier wave C1 and carrier wave C2 sends the time is specific as follows：
Step 301：Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij, can specifically pass through terminal AiCarrying
Ripple CjThe mode for sending random access procedure obtains Timing Advance TAij；Wherein, i=1 ... ..., n, n is more than or equal to 2
Integer；J=1 ... ..., m, m=2；
Step 302：From carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal AiIn carrier wave CkOn
Timing Advance TAikOn the basis of Timing Advance；C is selected in the present embodiment1It is used as reference carrier, namely TAi1On the basis of the time carry
Preceding amount；
Step 303：By institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(1-2), wherein, j is unequal with k；
Step 304：Based on obtained lead difference DELTA TAi(1-2)Obtain the class average value Δ of Timing Advance difference
T(1-2)；That is, by Δ TA1(1-2)... ..., Δ TAn(1-2)The class that the value divided by n that addition is obtained obtain Timing Advance difference is averaged
It is worth Δ T(1-2)；
Step 305：Class average value Δ T based on obtained Timing Advance difference(1-2)Carrier wave C is set1, C2Transmission when
Between, it is specific as follows：
Judge Δ T(1-2)Whether it is more than or equal to 0, in this way, then obtains T2=T1+ΔT(1-2)；Otherwise, T2=T1-ΔT(1-2)This reality
Apply in example, specifically can be by T1It is set to zero moment.
It is worth noting that, in above-mentioned steps 305, can also include the steps of：
Based on obtained Δ T(1-2)Judge terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still
Have, then control base station is abandoned using carrier aggregation technology to these terminals, data biography is carried out using single carrier for these terminals
It is defeated, that is, use the good carrier wave of link-quality to carry out data transmission for this Terminal Type.Then by this Terminal Type from calculate delivery time
Sequence in exclude.
Embodiment three：
In the present embodiment, if relay base station uses wireless mode and control base station（Donor eNode B）Connection, the chain
Road can be described as return link（Backhaul Link）；Relay base station is used and control base station similar mode is connected with each terminal,
Referred to as access link（Access Link）.In MTA carrier aggregation scenes as defined in 3GPP RAN2, control base station and relay base station
Different carrier waves can be used（Such as C1And C2）Service, i.e. control base station are provided using carrier wave C for terminal1Clothes are provided for terminal
Business；Simultaneously, the service that control base station is relay base station, relay base station is provided for terminal uses carrier wave C2。C1And C2It is probably
Same frequency band intercarrier, at this moment both can be considered as intralband carrier aggregation；C1And C2It is also likely to be the carrier wave of different frequency bands, this
When both can be considered as interband carrier aggregation.Above-mentioned situation, is all likely to occur C1And C2The incoming terminal time difference（TAE）It is larger, and
Need to use different up lead TA.The present embodiment is directed to carrier wave C for this application scenarios1With carrier wave C2Transmission when
Between setting up procedure illustrate, it is shown in Figure 4：
Step 401：Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij, specifically can also pass through terminal Ai
Carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij, for example, control base station can pass through terminal AiIn carrier wave
C1The mode for sending random access procedure obtains Timing Advance TAi1；Relay base station can pass through terminal AiIn carrier wave C2Send random
The mode of joining procedure obtains Timing Advance TAi2, and control base station is sent to by above-mentioned return link；Wherein, the i=
1 ... ..., n, n are the integer more than or equal to 2；J=1 ... ..., m, m=2；
Step 402：From carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal AiIn carrier wave CkOn
Timing Advance TAikOn the basis of Timing Advance；C2 is selected in the present embodiment as reference carrier, namely TAi2On the basis of the time carry
Preceding amount；
Step 403：By institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(2-1), wherein, j is unequal with k；
Step 404：Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationiz；
Step 405：Based on obtained lead difference DELTA TAi(1-2)Timing Advance difference is obtained with reference to the application scenarios
Class average value Δ T(2-1)；That is, by Δ TA1(2-1)... ..., Δ TAn(2-1)And the TT1z... ..., TTnzIt is added what is obtained
Value divided by n obtain the class average value Δ T of Timing Advance difference(2-1)；
Step 406：Class average value Δ T based on obtained Timing Advance difference(2-1)Carrier wave C is set1, C2Transmission when
Between, it is specific as follows：
Judge Δ T(2-1)Whether it is more than or equal to 0, in this way, then obtains T1=T2+ΔT(2-1)；Otherwise, T1=T2-ΔT(2-1)This reality
Apply in example, specifically can be by T2It is set to zero moment.
It is worth noting that, in above-mentioned steps 406, can also include the steps of：
Based on obtained Δ T(2-1)Judge terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still
Have, then control base station is abandoned using carrier aggregation technology to these terminals, data biography is carried out using single carrier for these terminals
It is defeated, that is, use the good carrier wave of link-quality to carry out data transmission for this Terminal Type.Then by this Terminal Type from calculate delivery time
Sequence in exclude.
It is worth noting that, be only that the present invention will be described by taking a relay base station as an example in the present embodiment, but this
Invention is not limited in the situation of a relay base station, it can be seen from the scheme in above-described embodiment one, those skilled in the art
It is easy to be generalized to the situation of multiple relay base stations according to record herein, is no longer repeated herein.
Example IV：
In the present embodiment, if RRH uses optical fiber and control base station（Donor eNode B）Connection, referred to as returns chain
Road；If RRH is used and control base station similar mode is connected with each terminal.MTA carrier aggregation scenes as defined in 3GPP RAN2
In, control base station and RRH can use different carrier waves（Such as C1And C2）Service, i.e. base station are provided using carrier wave C for terminal1
Service is provided for terminal, and RRH uses carrier wave C for the service that terminal is provided2。C1、C2It is probably same frequency band intercarrier, this
When both can be considered as intralband carrier aggregation；C1、C2It is also likely to be the carrier wave of different frequency bands, at this moment both can be considered as interband load
Ripple polymerize.Above-mentioned two situations, are all likely to occur C1And C2The incoming terminal time difference（TAE）It is larger, and need using different upper
Row lead（TA）.The present embodiment is directed to the carrier wave C of this application scenarios1With carrier wave C2Transmission the time setting up procedure carry out
Illustrate, it is shown in Figure 5：
Step 501：Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij, specifically can also pass through terminal Ai
Carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij, for example, control base station can pass through terminal AiIn carrier wave
C1The mode for sending random access procedure obtains Timing Advance TAi1；RRH can pass through terminal AiIn carrier wave C2Send Stochastic accessing
The mode of program obtains Timing Advance TAi2, and control base station is sent to by above-mentioned return link；Wherein, the i=
1 ... ..., n, n are the integer more than or equal to 2；J=1 ... ..., m, m=2；
Step 502：From carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal AiIn carrier wave CkOn
Timing Advance TAikOn the basis of Timing Advance；C is selected in the present embodiment2It is used as reference carrier, namely TAi2On the basis of the time carry
Preceding amount；
Step 503：By institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(2-1), wherein, j is unequal with k；
Step 504：Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationir；
Step 505：Based on obtained lead difference DELTA TAi(1-2)Timing Advance difference is obtained with reference to the application scenarios
Class average value Δ T(2-1)；That is, by Δ TA1(2-1)... ..., Δ TAn(2-1)And the TTir... ..., TTnrIt is added what is obtained
Value divided by n obtain the class average value Δ T of Timing Advance difference(2-1)；
Step 506：Class average value Δ T based on obtained Timing Advance difference(2-1)Carrier wave C is set1, C2Transmission when
Between, it is specific as follows：
Judge Δ T(2-1)Whether it is more than or equal to 0, in this way, then obtains T1=T2+ΔT(2-1)；Otherwise, T1=T2-ΔT(2-1)This reality
Apply in example, specifically can be by T2It is set to zero moment.
It is worth noting that, in above-mentioned steps 506, can also include the steps of：
Based on obtained Δ T(2-1)Judge terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still
Have, then control base station is abandoned using carrier aggregation technology to these terminals, data biography is carried out using single carrier for these terminals
It is defeated, that is, use the good carrier wave of link-quality to carry out data transmission for this Terminal Type.Then by this Terminal Type from calculate delivery time
Sequence in exclude.
Each carrier wave C is set by said process1... ..., CmThe transmission time after, you can during based on the transmission set
Between in carrier wave C1... ..., CmIn at least one carrier wave on send corresponding signal of communication and communicated.
It is worth noting that, be only that the present invention will be described by taking a RRH as an example in the present embodiment, but the present invention is simultaneously
RRH situation is not limited only to, it can be seen from the scheme in above-described embodiment one, those skilled in the art are according to note herein
The situation for being easy to be generalized to multiple RRH is carried, is no longer repeated herein.
Embodiment five：
In order to be better understood from the present invention, the present embodiment combination communication system is described further to the application.
Communication system in the present embodiment includes the terminal A in control base station and celli, i=1 ... ..., n, n be more than etc.
In 2 integer；
Shown in Figure 6, the control base station in the present embodiment includes Timing Advance acquisition module, reference carrier and selected
Module, Timing Advance difference acquisition module and carrier wave send set of time module；
Timing Advance acquisition module is used to obtain terminal A in cell in the manner described aboveiIn carrier wave CjOn time advance
Measure TAij；J=1 ... ..., m, m is the integer more than or equal to 2；
Reference carrier selecting module is used for from carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal
AiIn carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；
Timing Advance difference acquisition module is used for TAijWith TAikSubtract each other, obtain Timing Advance difference DELTA TAi(k-j),
J is unequal with k；
Carrier wave, which sends set of time module, to be used to be based on Timing Advance difference DELTA TAi(k-j)Carrier wave C is set1... ..., Cm's
It is the transmission time, specific as follows：
Carrier wave sends set of time module based on obtained lead difference DELTA TAi(k-j)Obtained with reference to specific application scenarios
To the class average value Δ T of Timing Advance difference(k-j)；
Carrier wave sends class average value Δ T of the set of time module based on obtained Timing Advance difference(k-j)Carrier wave is set
C1... ..., CmThe transmission time, it is specific as follows：
Reference carrier C is setkTransmission time Tk；
Judge the class average value Δ T of Timing Advance difference(k-j)Whether 0, in this way, then carrier wave C are more than or equal tojTransmission when
Between Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
Separately below with reference to exemplified by the three kinds of application scenarios of said system and embodiment two into example IV, to the present invention
It is described further：
Embodiment six：
In the present embodiment, control base station uses two component carrier C of carrier aggregation1And C2For terminal AiService, its
In, i=1 ... ..., n, the n is the integer more than or equal to 2.That is, in the present embodiment, m=2 in embodiment one, but it should
Understand, be intended merely to be the present invention schematical explanation herein, but the present invention is not limited merely to control base station and is only
Terminal AiTwo carrier waves are provided, that is, a kind of m value of embodiment can be taken as any integer value more than 2.
In order to ensure control base station to terminal Ai（Wherein, i=1 ... ..., n, the n is the integer more than or equal to 2）Send
Two carrier information reaching time-differences meet TAE requirements, Timing Advance is larger（Propagation delay time is larger）Carrier wave send when
Between need to shift to an earlier date.Because different terminals are directed to carrier wave C in control base station serving cell1With carrier wave C2Up transmission time advance
Measure TAi1、TAi2Can be because it be apart from the factors such as base station location and different, i.e. TAi1≠TAi2, it is therefore desirable to consider difference
Up transmission Timing Advance of the terminal on carrier wave C1 and carrier wave C2 is so that it is determined that base station is sent for the carrier wave of different carrier waves
Time.In the present embodiment, if carrier wave C1The transmission time be T1, if carrier wave C2The transmission time be T2；Carrier wave C1 and carrier wave C2
The setting up procedure of transmission time is specific as follows：
Timing Advance acquisition module obtains terminal A in celliIn carrier wave CjOn Timing Advance TAij, can specifically lead to
Cross terminal AiIn carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij；Wherein, i=1 ... ..., n, n
For the integer more than or equal to 2；J=1 ... ..., m, m=2；
Reference carrier selecting module is from carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal Ai
Carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；C is selected in the present embodiment1It is used as reference carrier, namely TAi1For
Fiducial time lead；
Timing Advance difference acquisition module is by institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(1-2), its
In, j is unequal with k；
Carrier wave sends set of time module based on obtained lead difference DELTA TAi(1-2)Obtain Timing Advance difference
Class average value Δ T(1-2)；That is, by Δ TA1(1-2)... ..., Δ TAn(1-2)It is poor that the value divided by n that addition is obtained obtain Timing Advance
The class average value Δ T of value(1-2)；
Carrier wave sends class average value Δ T of the set of time module based on obtained Timing Advance difference(1-2)Carrier wave is set
C1, C2The transmission time, it is specific as follows：
Carrier wave sends set of time module and judges Δ T(1-2)Whether it is more than or equal to 0, in this way, then obtains T2=T1+ΔT(1-2)；
Otherwise, T2=T1-ΔT(1-2), specifically can be by T in the present embodiment1It is set to zero moment.
It is worth noting that, in above process, carrier wave sends set of time module can also be based on obtained Δ T(1-2)Sentence
Disconnected terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still having, then control base station is abandoned to these terminals
Using carrier aggregation technology, carried out data transmission for these terminals using single carrier, that is, use the good carrier wave of link-quality for
This Terminal Type carries out data transmission.Then this Terminal Type is excluded out of sequence that calculate delivery time.
Embodiment seven：
In the present embodiment, if relay base station uses wireless mode and control base station（Donor eNode B）Connection, the chain
Road can be described as return link（Backhaul Link）；Relay base station is used and control base station similar mode is connected with each terminal,
Referred to as access link（Access Link）.In MTA carrier aggregation scenes as defined in 3GPP RAN2, control base station and relay base station
Different carrier waves can be used（Such as C1And C2）Service, i.e. control base station are provided using carrier wave C for terminal1Clothes are provided for terminal
Business；Simultaneously, the service that control base station is relay base station, relay base station is provided for terminal uses carrier wave C2。C1And C2It is probably
Same frequency band intercarrier, at this moment both can be considered as intralband carrier aggregation；C1And C2It is also likely to be the carrier wave of different frequency bands, this
When both can be considered as interband carrier aggregation.Above-mentioned situation, is all likely to occur C1And C2The incoming terminal time difference（TAE）It is larger, and
Need to use different up lead TA.The present embodiment is directed to carrier wave C for this application scenarios1With carrier wave C2Transmission when
Between setting up procedure illustrate：
Timing Advance acquisition module obtains terminal A in celliIn carrier wave CjOn Timing Advance TAij, specifically also may be used
Pass through terminal AiIn carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij, for example, control base station can pass through
Terminal AiIn carrier wave C1The mode for sending random access procedure obtains Timing Advance TAi1；Relay base station can pass through terminal AiCarrying
Ripple C2The mode for sending random access procedure obtains Timing Advance TAi2, and control base station is sent to by above-mentioned return link
Timing Advance acquisition module；Wherein, i=1 ... ..., n, n is the integer more than or equal to 2；J=1 ... ..., m, institute
State m=2；
Reference carrier selecting module is from carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal Ai
Carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；C2 is selected in the present embodiment as reference carrier, namely TAi2For
Fiducial time lead；
Timing Advance difference acquisition module is by institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(2-1), its
In, j is unequal with k；
Carrier wave sends set of time module and obtains terminal AiDownlink times of the correspondence control base station to relay base station
TTiz；By Δ TA1(2-1)... ..., Δ TAn(2-1)And the TT1z... ..., TTnzIt is added obtained value divided by n obtains the time and carried
The class average value Δ T of preceding amount difference(2-1), it is specific as follows：
Carrier wave sends set of time module and judges Δ T(2-1)Whether it is more than or equal to 0, in this way, then obtains T1=T2+ΔT(2-1)；
Otherwise, T1=T2-ΔT(2-1), specifically can be by T in the present embodiment2It is set to zero moment.
It is worth noting that, in above process, carrier wave sends set of time module can also be based on obtained Δ T(2-1)Sentence
Disconnected terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still having, then control base station is abandoned to these terminals
Using carrier aggregation technology, carried out data transmission for these terminals using single carrier, that is, use the good carrier wave of link-quality for
This Terminal Type carries out data transmission.Then this Terminal Type is excluded out of sequence that calculate delivery time.
Embodiment eight：
In the present embodiment, if RRH uses optical fiber and control base station（Donor eNode B）Connection, referred to as returns chain
Road；If RRH is used and control base station similar mode is connected with each terminal.MTA carrier aggregation scenes as defined in 3GPP RAN2
In, control base station and RRH can use different carrier waves（Such as C1And C2）Service, i.e. base station are provided using carrier wave C for terminal1
Service is provided for terminal, and RRH uses carrier wave C for the service that terminal is provided2。C1、C2It is probably same frequency band intercarrier, this
When both can be considered as intralband carrier aggregation；C1、C2It is also likely to be the carrier wave of different frequency bands, at this moment both can be considered as interband load
Ripple polymerize.Above-mentioned two situations, are all likely to occur C1And C2The incoming terminal time difference（TAE）It is larger, and need using different upper
Row lead（TA）.The present embodiment is directed to the carrier wave C of this application scenarios1With carrier wave C2Transmission the time setting up procedure carry out
Explanation：
Timing Advance acquisition module obtains terminal A in celliIn carrier wave CjOn Timing Advance TAij, specifically also may be used
Pass through terminal AiIn carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij, for example, control base station can pass through
Terminal AiIn carrier wave C1The mode for sending random access procedure obtains Timing Advance TAi1；RRH can pass through terminal AiIn carrier wave C2
The mode for sending random access procedure obtains Timing Advance TAi2, and by above-mentioned return link be sent to control base station when
Between lead acquisition module；Wherein, i=1 ... ..., n, n is the integer more than or equal to 2；J=1 ... ..., m, the m=
2；
Reference carrier selecting module is from carrier wave C1... ..., CmOne carrier wave C of middle selectionkIt is used as reference carrier, terminal Ai
Carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；C is selected in the present embodiment2It is used as reference carrier, namely TAi2For
Fiducial time lead；
Timing Advance difference acquisition module is by institute TAi2With TAi1Subtract each other, obtain Timing Advance difference DELTA TAi(2-1), its
In, j is unequal with k；
Carrier wave sends set of time module and obtains terminal AiDownlink times of the correspondence control base station to relay base station
TTir, by Δ TA1(2-1)... ..., Δ TAn(2-1)And the TTir... ..., TTnrIt is added obtained value divided by n obtains the time and carried
The class average value Δ T of preceding amount difference(2-1)；Class average value Δ T based on obtained Timing Advance difference(2-1)Carrier wave C is set1,
C2The transmission time, it is specific as follows：
Carrier wave sends set of time module and judges Δ T(2-1)Whether it is more than or equal to 0, in this way, then obtains T1=T2+ΔT(2-1)；
Otherwise, T1=T2-ΔT(2-1), specifically can be by T in the present embodiment2It is set to zero moment.
It is worth noting that, in above process, carrier wave sends set of time module can also be based on obtained Δ T(2-1)Sentence
Disconnected terminal A1... ..., AnIn with the presence or absence of be unsatisfactory for TAE requirement terminal；As still having, then control base station is abandoned to these terminals
Using carrier aggregation technology, carried out data transmission for these terminals using single carrier, that is, use the good carrier wave of link-quality for
This Terminal Type carries out data transmission.Then this Terminal Type is excluded out of sequence that calculate delivery time.
Each carrier wave C is set by said process1... ..., CmThe transmission time after, you can during based on the transmission set
Between in carrier wave C1... ..., CmIn at least one carrier wave on send corresponding signal of communication and communicated.
It can be seen that, the present invention calculates base station for each carrier wave respectively according to Timing Advance of each terminal on each carrier wave
The timing information of transmission, and according to this timing information, on the basis of one of component carrier, calculate other component carriers with
The Timing Advance time difference, and then determine according to Timing Advance of the different terminals on different carrier waves the transmission of each carrier wave
Time, with ensure the maximum time difference between all terminals are received in cell each carrier signal meet TAE requirement and
Corresponding demodulation performance.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the protection of the present invention should be all considered as belonging to
Scope.
Claims (10)
1. a kind of carrier wave sends time setting method, it is characterised in that including：
Obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij；I=1 ... ..., the n, the n are more than or equal to 2
Integer；J=1 ... ..., the m, the m are the integer more than or equal to 2；
From the carrier wave C1... ..., CmOne carrier wave C of middle selectionkAs reference carrier, the terminal AiIn the carrier wave CkOn
Timing Advance TAikOn the basis of Timing Advance；
By the TAijWith the TAikSubtract each other, obtain Timing Advance difference DELTA TAi(k-j), the j is not equal to the k；
Based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ..., CmThe transmission time, including：
Calculate the class average value Δ T of Timing Advance difference(k-j)；
Reference carrier C is setkTransmission time Tk；
Judge the class average value Δ T of the Timing Advance difference(k-j)Whether 0, in this way, then carrier wave C are more than or equal tojTransmission when
Between Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
2. carrier wave as claimed in claim 1 sends time setting method, it is characterised in that the carrier wave CjIt is for control base station
The terminal AiThe carrier wave of offer；The class average value Δ T for calculating Timing Advance difference(k-j)Including：
By Δ TA1(k-j)... ..., Δ TAn(k-j)It is added obtained value divided by n obtains the class average value Δ of Timing Advance difference
T(k-j)。
3. carrier wave as claimed in claim 1 sends time setting method, it is characterised in that the m=2, the carrier wave C1For control
Base station processed is the terminal AiThe carrier wave of offer, the carrier wave C2It is the terminal A for relay base stationiThe carrier wave of offer；
The class average value Δ T for calculating Timing Advance difference(k-j)Including：
Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationiz；
By the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1z..., TTnzIt is added obtained value divided by n obtains the time
The class average value Δ T of lead difference(k-j)。
4. carrier wave as claimed in claim 1 sends time setting method, it is characterised in that the m=2, the carrier wave C1For control
Base station processed is the terminal AiThe carrier wave of offer, the carrier wave C2It is the terminal A for RF remoteiThe carrier wave of offer；
The class average value Δ T for calculating Timing Advance difference(k-j)Including：
Obtain terminal AiDownlink times TT of the correspondence control base station to relay base stationir；
By the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1r..., TTnrIt is added obtained value divided by n obtains the time
The class average value Δ T of lead difference(k-j)。
5. the carrier wave as described in claim any one of 1-4 sends time setting method, it is characterised in that the acquisition base station institute
Terminal A in celliIn carrier wave CjOn Timing Advance TAijSpecially：
Pass through terminal AiIn carrier wave CjThe mode for sending random access procedure obtains Timing Advance TAij。
6. the carrier wave as described in claim any one of 1-4 sends time setting method, it is characterised in that the carrier wave CjFor band
Different carrier waves in interior continuous carrier polymerization, or it is poly- with the different carrier waves in the polymerization of interior discontinuous carrier, or interband continuous carrier
Different carrier waves in conjunction.
7. a kind of communication system, it is characterised in that including the terminal A in control base station and celli；I=1 ... ..., the n, it is described
N is the integer more than or equal to 2；The control base station is carried including Timing Advance acquisition module, reference carrier selecting module, time
Preceding amount difference acquisition module and carrier wave send set of time module,
The Timing Advance acquisition module is used to obtain terminal A in celliIn carrier wave CjOn Timing Advance TAij；The j
=1 ... ..., m, the m are the integer more than or equal to 2；
The reference carrier selecting module is used for from the carrier wave C1... ..., CmOne carrier wave C of middle selectionkAs reference carrier,
The terminal AiIn the carrier wave CkOn Timing Advance TAikOn the basis of Timing Advance；
The Timing Advance difference acquisition module is used for the TAijWith the TAikSubtract each other, obtain Timing Advance difference DELTA
TAi(k-j), the j is not equal to the k；
Carrier wave, which sends set of time module, to be used to be based on the Timing Advance difference DELTA TAi(k-j)The carrier wave C is set1... ...,
CmThe transmission time, including：
The carrier wave sends the class average value Δ T that set of time module calculates Timing Advance difference(k-j)；
The carrier wave sends set of time module and sets reference carrier CkTransmission time Tk；
The carrier wave sends the class average value Δ T that set of time module judges the Timing Advance difference(k-j)Whether be more than etc.
In 0, in this way, then carrier wave CjTransmission time Tj=Tk+ΔT(k-j)；Otherwise, carrier wave CjTransmission time Tj=Tk-ΔT(k-j)。
8. communication system as claimed in claim 7, it is characterised in that the carrier wave CjIt is the terminal for the control base station
AiThe carrier wave of offer；The carrier wave sends the class average value Δ T that set of time module calculates Timing Advance difference(k-j)Including：
The carrier wave sends set of time module by Δ TA1(k-j)... ..., Δ TAn(k-j)It is added obtained value divided by n obtains the time
The class average value Δ T of lead difference(k-j)。
9. communication system as claimed in claim 7, it is characterised in that the m=2, the carrier wave C1It is for the control base station
The terminal AiThe carrier wave of offer, the carrier wave C2It is the terminal A for relay base stationiThe carrier wave of offer；
The carrier wave sends the class average value Δ T that set of time module calculates Timing Advance difference(k-j)Including：
The carrier wave sends set of time module and obtains terminal AiDownlink times of the correspondence control base station to relay base station
TTiz；
The carrier wave sends set of time module by the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1z..., TTnz
It is added obtained value divided by n obtains the class average value Δ T of Timing Advance difference(k-j)。
10. communication system as claimed in claim 7, it is characterised in that the m=2, the carrier wave C1For the control base station
For the terminal AiThe carrier wave of offer, the carrier wave C2It is the terminal A for RF remoteiThe carrier wave of offer；
The carrier wave sends the class average value Δ T that set of time module calculates Timing Advance difference(k-j)Including：
The carrier wave sends set of time module and obtains terminal AiDownlink times of the correspondence control base station to relay base station
TTir；
The carrier wave sends set of time module by the Δ TA1(k-j)... ..., Δ TAn(k-j), and the TT1r..., TTnr
It is added obtained value divided by n obtains the class average value Δ T of Timing Advance difference(k-j)。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310101126.3A CN104080159B (en) | 2013-03-26 | 2013-03-26 | Carrier wave sends time setting method and communication system |
| PCT/CN2013/083449 WO2014153928A1 (en) | 2013-03-26 | 2013-09-13 | Method for setting sending time of carrier, and communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310101126.3A CN104080159B (en) | 2013-03-26 | 2013-03-26 | Carrier wave sends time setting method and communication system |
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| CN104080159A CN104080159A (en) | 2014-10-01 |
| CN104080159B true CN104080159B (en) | 2017-08-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753202A (en) * | 2010-01-07 | 2010-06-23 | 中兴通讯股份有限公司 | Up synchronous method and terminal. |
| CN102905361A (en) * | 2011-07-28 | 2013-01-30 | 普天信息技术研究院有限公司 | Timing method and device under multi-carrier situation |
| CN103517401A (en) * | 2012-06-29 | 2014-01-15 | 中兴通讯股份有限公司 | Wireless transmission method, device and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130315214A1 (en) * | 2011-02-01 | 2013-11-28 | Wei Bai | Timing Advance Without Random Access Channel Access |
| CN102695285B (en) * | 2011-03-21 | 2014-12-03 | 华为技术有限公司 | Random access method under multi-carrier scenarios, and device |
-
2013
- 2013-03-26 CN CN201310101126.3A patent/CN104080159B/en active Active
- 2013-09-13 WO PCT/CN2013/083449 patent/WO2014153928A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753202A (en) * | 2010-01-07 | 2010-06-23 | 中兴通讯股份有限公司 | Up synchronous method and terminal. |
| CN102905361A (en) * | 2011-07-28 | 2013-01-30 | 普天信息技术研究院有限公司 | Timing method and device under multi-carrier situation |
| CN103517401A (en) * | 2012-06-29 | 2014-01-15 | 中兴通讯股份有限公司 | Wireless transmission method, device and system |
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| WO2014153928A1 (en) | 2014-10-02 |
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