CN103582111A - Non-main carrier downlink synchronization method and device - Google Patents
Non-main carrier downlink synchronization method and device Download PDFInfo
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- CN103582111A CN103582111A CN201210265045.2A CN201210265045A CN103582111A CN 103582111 A CN103582111 A CN 103582111A CN 201210265045 A CN201210265045 A CN 201210265045A CN 103582111 A CN103582111 A CN 103582111A
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Abstract
The invention provides a non-main carrier downlink synchronization method and device. The method comprises the steps of receiving the information of an SCH of a main carrier and carrying out non-main carrier downlink synchronization according to the received information of the SCH of the main carrier. Therefore, the situation that the non-main carrier downlink synchronization is carried out through a training sequence with high interference on a non-main carrier is avoided, and then the reliability of the non-main carrier downlink synchronization can be improved.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of auxiliary carrier wave down link synchronisation method and device.
Background technology
Along with the development of mobile communication technology, multi-transceiver technology by frequent application in various communication systems.So-called multi-transceiver technology, there are a plurality of carrier waves Ji Yige community, and community can utilize a plurality of carrier transmission business, thereby has greatly increased the capacity of community.When multicarrier is supported in community, the carrier wave of one of them frequency of take is main carrier, and the carrier wave of other frequencies is subcarrier, i.e. auxiliary carrier wave.
In communication system, auxiliary carrier wave is by a large amount of multiplexing with transport service, and for example, in gsm system network environment, auxiliary carrier wave is by multiplexing in a large number.Thus, the auxiliary carrier wave in community is easy to disturbed, causes receiving terminal from training sequence region, to obtain obvious channel impulse, and down-going synchronous is easily lost.Meanwhile, auxiliary carrier wave does not have private downlink synchronizing channel, and the data demodulates under its business time-slot relies on the training sequence of time slot data zone line to estimate channel impulse response and descending timing completely, thus, very easily causes follow-up conciliation variation, decoding failure.
To this, solution of the prior art is: demodulation module is done descending timing slip according to the window power of the relevant tap of received training sequence and estimated, and after completing demodulation, export soft bit and; Master control is according to soft bit and whether cross thresholding and level and smooth mechanism determines whether will carry out timing trend adjustment, if master control thinks that demodulation is unreliable or signal is unreliable, and uncomfortable timing.
Yet there is following shortcoming in above-mentioned solution:
1. because auxiliary carrier wave is easy to disturbedly, for example, when the soft bit of demodulation with while continuing to be less than threshold value (600), when master control is not adjusted descending timing, easily cause down-going synchronous to lose, make the solution of subsequent burst piece be in harmonious proportion decoding and worsen;
2. in the first situation, even if master control adjustment is also a kind of trend adjustment, if descending timing slip is larger, trend adjustment is slow, causes part burst above, when training sequence related algorithm, the actual training sequence region receiving has gone out effective ground window scope;
3. the current anti-co-channel interference algorithm in some advanced arrowbands, for example DARP algorithm, because channel impulse response window is less, requires descending Timing Synchronization more accurate, slightly larger when descending timing offset, will cause DARP algorithm to worsen.
Therefore, how to improve the down-going synchronous of auxiliary carrier wave, be still the technical barrier that those skilled in the art need to further study and solve.
Summary of the invention
The object of the present invention is to provide a kind of auxiliary carrier wave down link synchronisation method and device, to solve the not high problem of auxiliary carrier wave down-going synchronous reliability in prior art.
For solving the problems of the technologies described above, the invention provides a kind of auxiliary carrier wave down link synchronisation method, comprising:
Receive the information of the SCH channel of main carrier;
According to the SCH channel information of the main carrier receiving, carry out auxiliary carrier wave down-going synchronous.
Optionally, in described auxiliary carrier wave down link synchronisation method, when the ts0 of TCH frame, ts1 and ts7 time slot are the free time on auxiliary carrier wave, utilize the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.
Optionally, in described auxiliary carrier wave down link synchronisation method, on auxiliary carrier wave, the ts0 time slot of TCH frame is idle, while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.
Optionally, in described auxiliary carrier wave down link synchronisation method, the partial information according to the SCH channel of the main carrier receiving, obtains the descending timing of main carrier, according to this descending timing, carries out auxiliary carrier wave down-going synchronous.
Optionally, in described auxiliary carrier wave down link synchronisation method, according to the partial information of the SCH channel of the main carrier receiving, the training sequence in the middle of the SCH channel of main carrier is made to correlation estimation, obtain the descending timing of main carrier.
Optionally, in described auxiliary carrier wave down link synchronisation method, when the ts0 time slot of TCH frame is busy on auxiliary carrier wave, utilize the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.
Optionally, in described auxiliary carrier wave down link synchronisation method, when auxiliary carrier wave switches, utilize the time interval in switching to receive the information of the SCH channel of main carrier, and carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
The present invention also provides a kind of auxiliary carrier wave downlink synchronization device, comprising:
Receiver module, in order to receive the information of the SCH channel of main carrier;
Synchronization module, in order to carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
Optionally, in described auxiliary carrier wave downlink synchronization device, when on auxiliary carrier wave, the ts0 of TCH frame, ts1 and ts7 time slot are the free time, described receiver module utilizes the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.
Optionally, in described auxiliary carrier wave downlink synchronization device, on auxiliary carrier wave, the ts0 time slot of TCH frame is idle, and while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, described receiver module utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.
Optionally, in described auxiliary carrier wave downlink synchronization device, described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, obtains the descending timing of main carrier, according to this descending timing, carries out auxiliary carrier wave down-going synchronous.
Optionally, in described auxiliary carrier wave downlink synchronization device, described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, is made correlation estimation to the training sequence in the middle of the SCH channel of main carrier, obtains the descending timing of main carrier.
Optionally, in described auxiliary carrier wave downlink synchronization device, when on auxiliary carrier wave, the ts0 time slot of TCH frame is busy, described receiver module utilizes the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.
Optionally, in described auxiliary carrier wave downlink synchronization device, when auxiliary carrier wave switches, the time interval in described receiver module utilization switching receives the information of the SCH channel of main carrier, and described synchronization module carries out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
In auxiliary carrier wave down link synchronisation method provided by the invention and device, receive the information of the SCH channel of main carrier, and carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving, just can avoid thus utilizing the training sequence disturbing on very large auxiliary carrier wave to carry out auxiliary carrier wave down-going synchronous, and then can improve the reliability of auxiliary carrier wave down-going synchronous.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the auxiliary carrier wave down link synchronisation method of the embodiment of the present invention;
Fig. 2 is the module diagram of the auxiliary carrier wave downlink synchronization device of the embodiment of the present invention;
Fig. 3 is the multi-frame structure schematic diagram on auxiliary carrier wave;
Fig. 4 is the multi-frame structure schematic diagram on main carrier;
Fig. 5 is the structural representation of time slot.
Embodiment
The auxiliary carrier wave down link synchronisation method and the device that the present invention are proposed below in conjunction with the drawings and specific embodiments are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of the aid illustration embodiment of the present invention lucidly.
[embodiment mono-]
According to background technology, introduce knownly, in communication system, auxiliary carrier wave is by a large amount of multiplexing with transport service, thus, auxiliary carrier wave in community is easy to disturbed, causes receiving terminal from training sequence region, to obtain obvious channel impulse, and down-going synchronous is easily lost.Meanwhile, auxiliary carrier wave does not have private downlink synchronizing channel, and the data demodulates under its business time-slot relies on the training sequence of time slot data zone line to estimate channel impulse response and descending timing completely, thus, very easily causes follow-up conciliation variation, decoding failure.
Prior art is to this solution all: improve the reliability of training sequence on auxiliary carrier wave, according to the training sequence on auxiliary carrier wave, carry out auxiliary carrier wave down-going synchronous.
But present inventor has proposed diverse solution thinking to this, it seeks from main carrier the information that auxiliary carrier wave carries out down-going synchronous.
Concrete, please refer to Fig. 1, the auxiliary carrier wave down link synchronisation method of the present embodiment, comprising:
The information of the SCH channel of S10, reception main carrier;
S11, according to the SCH channel information of the main carrier receiving, carry out auxiliary carrier wave down-going synchronous.
By receiving the information of the SCH channel of main carrier; The principle of carrying out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving is: the lower provisional capital of all carrier waves in community (no matter being main carrier or auxiliary carrier wave) is synchronous, and the situation that in network environment, main carrier is re-used seldom, and main carrier has synchronizing channel, in communication process, synchronous SCH channel information to main carrier receives and decoding, obtain down-going synchronous timing accurately, adjust accordingly the receiving slot of descending auxiliary carrier wave regularly, thereby guarantee follow-up conciliation and decoding.
Wherein, after having received SCH channel information, the SCH channel information receiving is received and decoding, obtain down-going synchronous timing accurately, the receiving slot of adjusting accordingly descending auxiliary carrier wave is regularly prior art, and the application repeats no more this.
The application's key point is: first, in the technical scheme proposing, by obtaining the information of SCH channel, and carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier obtaining in the application; Secondly, the application has also proposed to obtain the method for SCH channel information, with the SCH channel information that obtains as much as possible, thereby improves the reliability to auxiliary carrier wave down-going synchronous.
About receiving the method for SCH channel information, specifically comprise several as follows:
Method one
When the ts0 of TCH frame, ts1 and ts7 time slot are the free time on auxiliary carrier wave, utilize the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.At this, because ts1 and the ts7 time slot of TCH frame is the free time, thus, while utilizing the ts0 time slot of TCH frame to receive the SCH channel information of main carrier, the time interval of carrying out frequency switching can be guaranteed, be switched on the frequency of main carrier (now, can utilize the ts7 time slot of TCH frame to carry out frequency switching for the first time, because this ts7 time slot is idle, to can not affect the transmission of business datum), after the ts0 time slot of TCH frame receives the SCH channel information of main carrier, still old time enough switches back on the frequency of auxiliary carrier wave (now, can utilize the ts1 time slot of TCH frame to carry out frequency switching for the second time, because this ts1 time slot is idle, to can not affect the transmission of business datum).
In the method, the ts0 time slot of whole TCH frame all can thus, can receive the full detail of SCH channel in order to receive SCH channel information, receives the ts0 time slot in SCH frame.After auxiliary carrier wave has received the synchronous SCH channel information of main carrier, just can receive and decoding, obtain down-going synchronous accurately and regularly, adjust accordingly the receiving slot of descending auxiliary carrier wave regularly, thereby guarantee follow-up conciliation and decoding.
Wherein, about receiving the moment point of SCH channel information, can be corresponding to figure 3 and Fig. 4, wherein, Fig. 3 is the multi-frame structure schematic diagram on auxiliary carrier wave; Fig. 4 is the multi-frame structure schematic diagram on main carrier.As shown in Figure 3, the multi-frame on auxiliary carrier wave is comprised of 26 tdma frames, comprises 24 frame TCH frames (representing with " T " in Fig. 3), 1 frame IDLE frame (representing with " I " in Fig. 3) and 1 frame SACCH frame (representing with " S " in Fig. 3).As shown in Figure 4, the multi-frame on main carrier is comprised of 51 tdma frames, comprises FCCH frame (representing with " F " in Fig. 4), SCH frame (representing with " S " in Fig. 4), BCCH frame (representing with " B " in Fig. 4), CCCH frame (representing with " C " in Fig. 4).
In 24 frame TCH frames shown in Fig. 3, when ts0, the ts1 on an arbitrary TCH frame and ts7 time slot are the free time, the ts0 time slot on this TCH frame just can be in order to receive the information on SCH frame.If while having ts0, ts1 on a plurality of TCH frames and ts7 time slot to be the free time, the ts0 time slot on the plurality of TCH frame all can be in order to receive the information on SCH frame, thereby can guarantee the reception for information on SCH frame.
Method two
On auxiliary carrier wave, the ts0 time slot of TCH frame is idle, while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.Now, owing to having at least one to be busy in the ts1 of TCH frame and ts7 time slot, if the ts0 time slot of TCH frame receives the full detail of the SCH channel of main carrier, will not have time enough to carry out frequency switching, may the reception for business datum on auxiliary carrier wave by impact.
Therefore, preferably, receive only the partial data of ts0 time slot in main carrier SCH frame, special, only receive spread training sequence wherein, according to the spread training sequence receiving, make correlation estimation, just can obtain the descending timing of main carrier.Meanwhile, auxiliary carrier wave just can carry out down-going synchronous according to the descending timing of this main carrier (being also now the descending timing of auxiliary carrier wave).About utilizing descending timing to carry out down-going synchronous for prior art, the application repeats no more this.
Wherein, the structure of relevant time slot please refer to Fig. 5; the duration of each time slot is 0.577ms; comprise 156.25 code elements, be respectively in order the tail bit of 3 code elements, the spread training sequence of the information bit of 39 code elements, 64 code elements, the tail bit of the information bit of 39 code elements, 3 code elements and the protection section of 8.25 code elements.
In the method for the information of the SCH channel of the reception main carrier of this method two, both considered frequency switching time, to have considered again, for carrying out obtaining of the required descending timing of down-going synchronous, to have realized both taking into account.
Method three
When the ts0 time slot of TCH frame is busy on auxiliary carrier wave, utilize the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.In existing multi-frame structure, IDLE frame is not yet utilized, and therefore, in the situation that TCH frame all can not be utilized, can utilize the information of the SCH channel of this IDLE frame reception main carrier, now can receive the full detail of the SCH channel of main carrier.In addition,, when SACCH frame is not used, also can utilize the ts0 time slot of this SACCH frame to receive the information of the SCH channel of main carrier.
Please continue to refer to Fig. 3 and Fig. 4, when utilizing IDLE frame and ACCH frame to receive the information of SCH channel of main carrier, because two the multi-frame frame numbers 26 and 51 on auxiliary carrier wave and main carrier do not have common factor, IDLE frame from auxiliary carrier wave 26 multi-frames and idle SACCH frame, main carrier 51 multi-frames are to snap to successively on the IDLE and SACCH frame of auxiliary carrier wave.According to the SCH dispatching cycle of main carrier 51 multi-frames, every 10 frames or 11 frames, repeat, therefore general 10*13 or 11*13 frame period, the SCH channel of main carrier can fall on the idle frame of auxiliary carrier wave, can receive the information of the SCH channel of main carrier.Even if consider the poorest situation (SACCH frame is used), at interval of 10*26 or 11*26 frame, the SCH channel of main carrier can fall on the IDLE frame of auxiliary carrier wave, can realize equally the information of the SCH channel that receives main carrier.
In the method for the information of the SCH channel of the reception main carrier of this method three, further proposed to utilize the unexpected tdma frame of TCH frame to receive the information of the SCH channel of main carrier, thereby realized the effective reception for the information of the SCH channel of main carrier.
Method four
When auxiliary carrier wave switches, utilize the time interval in switching to receive the information of the SCH channel of main carrier, and carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.When carrier wave switches, be no matter synchronous switching or asynchronous switching, receiver is reserved with certain time interval with the new carrier wave Shi Douhui that connects, now, the channel configuration information of main carrier is known, can utilize this section of idle interval to carry out down-going synchronous to the main carrier of community.Main carrier is carried out after down-going synchronous, this descending timing relationship is reliably accurately, therefore the timing adjustment in the time interval that can simultaneously switch at this carrier wave, the receiving slot of auxiliary carrier wave being settled at one go carries out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier obtaining simultaneously.
In the method for the information of the SCH channel of the reception main carrier of this method four, effectively utilized this blank time that carrier wave switches, realized reliably the down-going synchronous for auxiliary carrier wave.
So far, present specification has proposed the method for reseptance of the information of the multiple SCH channel for main carrier, those skilled in the art can realize the information of the SCH channel that receives main carrier accordingly, according to the SCH channel information of the main carrier receiving, carry out auxiliary carrier wave down-going synchronous, reach and avoid utilizing the training sequence disturbing on very large auxiliary carrier wave to carry out auxiliary carrier wave down-going synchronous, improve the beneficial effect of the reliability of auxiliary carrier wave down-going synchronous.
[embodiment bis-]
In addition, the application is also corresponding provides a kind of auxiliary carrier wave downlink synchronization device, please refer to Fig. 2, and described auxiliary carrier wave downlink synchronization device comprises:
When on auxiliary carrier wave, the ts0 of TCH frame, ts1 and ts7 time slot are the free time, described receiver module utilizes the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.
On auxiliary carrier wave, the ts0 time slot of TCH frame is idle, and while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, described receiver module utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.Described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, obtains the descending timing of main carrier, according to this descending timing, carries out auxiliary carrier wave down-going synchronous.Described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, is made correlation estimation to the training sequence in the middle of the SCH channel of main carrier, obtains the descending timing of main carrier.
When on auxiliary carrier wave, the ts0 time slot of TCH frame is busy, described receiver module utilizes the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.
When auxiliary carrier wave switches, the time interval in described receiver module utilization switching receives the information of the SCH channel of main carrier, and described synchronization module carries out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
Utilize described auxiliary carrier wave downlink synchronization device can realize the down-going synchronous of auxiliary carrier wave, reach and avoid utilizing the training sequence disturbing on very large auxiliary carrier wave to carry out auxiliary carrier wave down-going synchronous, improve the beneficial effect of the reliability of auxiliary carrier wave down-going synchronous.In addition, about the NM content of the present embodiment two, can corresponding reference example
Foregoing description is only the description to preferred embodiment of the present invention, the not any restriction to the scope of the invention, and any change, modification that the those of ordinary skill in field of the present invention is done according to above-mentioned disclosure, all belong to the protection range of claims.
Claims (14)
1. an auxiliary carrier wave down link synchronisation method, is characterized in that, comprising:
Receive the information of the SCH channel of main carrier;
According to the SCH channel information of the main carrier receiving, carry out auxiliary carrier wave down-going synchronous.
2. auxiliary carrier wave down link synchronisation method as claimed in claim 1, is characterized in that, when the ts0 of TCH frame, ts1 and ts7 time slot are the free time on auxiliary carrier wave, utilizes the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.
3. auxiliary carrier wave down link synchronisation method as claimed in claim 1, it is characterized in that, on auxiliary carrier wave, the ts0 time slot of TCH frame is idle, while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.
4. auxiliary carrier wave down link synchronisation method as claimed in claim 3, is characterized in that, the partial information according to the SCH channel of the main carrier receiving, obtains the descending timing of main carrier, according to this descending timing, carries out auxiliary carrier wave down-going synchronous.
5. auxiliary carrier wave down link synchronisation method as claimed in claim 4, is characterized in that, according to the partial information of the SCH channel of the main carrier receiving, the training sequence in the middle of the SCH channel of main carrier is made to correlation estimation, obtains the descending timing of main carrier.
6. auxiliary carrier wave down link synchronisation method as claimed in claim 1, is characterized in that, when the ts0 time slot of TCH frame is busy on auxiliary carrier wave, utilizes the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.
7. auxiliary carrier wave down link synchronisation method as claimed in claim 1, it is characterized in that, when auxiliary carrier wave switches, utilize the time interval in switching to receive the information of the SCH channel of main carrier, and carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
8. an auxiliary carrier wave downlink synchronization device, is characterized in that, comprising:
Receiver module, in order to receive the information of the SCH channel of main carrier;
Synchronization module, in order to carry out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
9. auxiliary carrier wave downlink synchronization device as claimed in claim 8, is characterized in that, when on auxiliary carrier wave, the ts0 of TCH frame, ts1 and ts7 time slot are the free time, described receiver module utilizes the ts0 time slot of TCH frame to receive the full detail of the SCH channel of main carrier.
10. auxiliary carrier wave downlink synchronization device as claimed in claim 8, it is characterized in that, on auxiliary carrier wave, the ts0 time slot of TCH frame is idle, while having at least one to be busy in the ts1 of TCH frame and ts7 time slot, described receiver module utilizes the ts0 time slot of TCH frame to receive the partial information of the SCH channel of main carrier simultaneously.
11. auxiliary carrier wave downlink synchronization devices as claimed in claim 10, is characterized in that, described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, obtains the descending timing of main carrier, according to this descending timing, carries out auxiliary carrier wave down-going synchronous.
12. auxiliary carrier wave downlink synchronization devices as claimed in claim 11, it is characterized in that, described synchronization module, according to the partial information of the SCH channel of the main carrier receiving, is made correlation estimation to the training sequence in the middle of the SCH channel of main carrier, obtains the descending timing of main carrier.
13. auxiliary carrier wave downlink synchronization devices as claimed in claim 1, is characterized in that, when on auxiliary carrier wave, the ts0 time slot of TCH frame is busy, described receiver module utilizes the ts0 time slot of IDLE frame and/or SACCH frame to receive the information of the SCH channel of main carrier.
14. auxiliary carrier wave downlink synchronization devices as claimed in claim 1, it is characterized in that, when auxiliary carrier wave switches, the time interval in described receiver module utilization switching receives the information of the SCH channel of main carrier, and described synchronization module carries out auxiliary carrier wave down-going synchronous according to the SCH channel information of the main carrier receiving.
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| CN201210265045.2A CN103582111A (en) | 2012-07-27 | 2012-07-27 | Non-main carrier downlink synchronization method and device |
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| CN201210265045.2A CN103582111A (en) | 2012-07-27 | 2012-07-27 | Non-main carrier downlink synchronization method and device |
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| WO2018171753A1 (en) * | 2017-03-24 | 2018-09-27 | 华为技术有限公司 | Synchronization method and apparatus |
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| US11063806B2 (en) | 2017-03-24 | 2021-07-13 | Huawei Technologies Co., Ltd. | Synchronization method and apparatus |
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