CN1956431A - Method for implementing synchronous of radio communication system - Google Patents
Method for implementing synchronous of radio communication system Download PDFInfo
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- CN1956431A CN1956431A CN 200510118313 CN200510118313A CN1956431A CN 1956431 A CN1956431 A CN 1956431A CN 200510118313 CN200510118313 CN 200510118313 CN 200510118313 A CN200510118313 A CN 200510118313A CN 1956431 A CN1956431 A CN 1956431A
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Abstract
This invention discloses a method for realizing synchronization in the radio communication system including: dividing specific synchronous signals of local areas into a first specific synchronous signal and a second one and deciding each frame to at least one period, distributing radio resources loading the first specific synchronous signal for each period and selecting radio resources loading the second signal in the rest radio resources of the corresponding period to get a set of specific synchronous signal radio resource patterns of more than one areas, the emission end selects a radio resource pattern for each area in the set to modulate and emit specific synchronous signals of the local areas, the receiving end demodulates the signal to get the synchronous information to carry out channel estimation with the signal.
Description
Technical field
The present invention relates to wireless communication technology, refer to realize in a kind of wireless communication system synchronous method especially.
Background technology
Because OFDM (OFDM) has significant technical advantage, so in wireless communications application, more and more come into one's own, for example IEEE 802.11a, standards such as 802.16 all adopt the OFDM technology, and 3GPP also considers to introduce the OFDM technology in the 3G of evolution system.
For wireless communication system, in whole signal emission process, at first carry out chnnel coding and modulation, the signal map after will modulating is then launched to physical channel.Wherein, just can adopt the OFDM technology to realize that detailed process is as follows to physical channel signal map: to suppose that the signal indication after the modulation is d
k(i), wherein k is subcarrier (sub carrier) label, and value is k=-N/2 ... ,-1,0,1 ..., N/2-1, the N in the formula are the subcarrier numbers of physical channel; I is the time label, represents i OFDM symbol period, and value is i=-∞ ... ,+∞.d
k(i) according to T '=T+T
gCycle in the time interval send, wherein T refers to the time span of useful signal in the OFDM symbol, T
gIt is the time span that Cyclic Prefix takies in the OFDM symbol.
Signal after the modulation through invert fast fourier transformation (IFFT), obtains N sampled data earlier, and this N sampled data is exactly useful symbol; Again with the N of useful symbol back
gIndividual sampled data constitutes Cyclic Prefix, the N+N that obtains thus before copying to useful symbol
gIndividual sampled data is called an OFDM symbol.Certainly, can not add Cyclic Prefix in the OFDM symbol, the OFDM symbol that generates such as skew quaternary amplitude modulation(PAM) ofdm system (OQAM-OFDM) does not just have Cyclic Prefix yet.
After the digital-to-analogue conversion (D/A) of OFDM symbol process, low-pass filtering, obtain baseband modulation signal s (t), then s (t) is loaded into frequency f
0Last emission.Baseband modulation signal s (t) sees formula (1), wherein d
k(l) refer to l OFDM symbol, a k subcarrier is uploaded the signal that send.
Finding out that from said process whole time-frequency plane is divided into the time-frequency lattice point, is unit with the OFDM symbol in time, is unit with the subcarrier on the frequency, and each time-frequency lattice point transmits a modulation signal.
In transmission course, modulation signal finally is received termination and receives through channel fading, Gaussian noise.For making receiving terminal can correctly receive modulation signal, need allow receiving terminal know the temporal information of signal, such as symbol timing, slot timing, radio frames timing, cell scrambling, sub-district frequency patterns information, frequency difference information, antenna configurations and bandwidth information etc., and the channel fading situation of this signal in transmission course etc.In wireless communication system, said process is normally finished by the emission pilot signal, and so-called pilot tone is exactly some signals of making an appointment of emission, makes receiving terminal obtain information needed according to these known signals.Have two kinds of pilot signals in actual the use, a kind of synchronizing information of carrying is so be called synchronizing signal; Another kind is that the channel performance in the sub-district is estimated, so be called the channel estimating signal.Before pilot signal transmitted, according to certain rule the time-frequency lattice point that pilot signal takies is set in advance, and divides the sign indicating number resource that is used in this signal of modulation, thereby generate the Radio Resource pattern of this pilot signal.Described Radio Resource refers to frequency resource, time resource, sign indicating number resource, and the combination in any of above-mentioned three kinds of resources; The Radio Resource pattern refers to the Radio Resource situation that certain signal takies of distributing to.
Among the 3GPP technology motion R1-051156, synchronizing signal is divided into the basic synchronizing signal and second synchronizing signal, and distributes the Radio Resource of these two kinds of signals of carrying.Wherein, basic synchronizing signal takies identical Radio Resource in all sub-districts, and second synchronizing signal is because what send is cell-specific information, such as the scrambler identifying information etc., so the Radio Resource that second synchronizing signal of different districts takies is different.For the channel estimating signal, different districts need adopt different Radio Resource pattern carryings when sending, so that distinguish the channel of different districts, avoid neighbor cell interference.
Find out that from the allocation of radio resources of above-mentioned pilot signal when launching synchronizing signal and channel estimating signal respectively, these two kinds of signals take different Radio Resources, thereby cause the wasting of resources to a certain degree.
In addition, when the Radio Resource pattern of design basic synchronizing signal, R1-051156 only distributes an OFDM symbol to use to basic synchronizing signal for the consideration of saving Radio Resource in every frame, thereby reduces the detection speed of synchronizing information.
Summary of the invention
In view of this, main purpose of the present invention is to provide the synchronous method of realization in a kind of wireless communication system, and the sub-district particular sync signal that will be provided with in the cycle is reused in channel estimating, thereby saves the Radio Resource that pilot signal takies.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
Realize synchronous method in a kind of wireless communication system, the sub-district particular sync signal is divided into first particular sync signal and second particular sync signal, and each signal frame is divided at least one cycle;
Carry the Radio Resource of first particular sync signal for each period allocated, and the Radio Resource of second particular sync signal is carried in selection in the residue Radio Resource in corresponding cycle, obtain the set of the Radio Resource pattern of an above sub-district particular sync signal, this method comprises:
A, transmitting terminal are Radio Resource pattern of each cell selecting from set set, by the Radio Resource modulation and the emission sub-district particular sync signal of this Radio Resource pattern correspondence;
B, receiving terminal obtain synchronizing information by the sub-district particular sync signal that demodulate reception arrives, and utilize this sub-district particular sync signal to carry out channel estimating.
The method that the Radio Resource of first particular sync signal is carried in described distribution is: for first particular sync signal of different cycles is distributed identical frequency resource and sign indicating number resource.
Described method of carrying the Radio Resource of first particular sync signal for each period allocated is: use to first particular sync signal first OFDM allocation of symbols in each cycle, and be that first particular sync signal that takies first OFDM symbol is distributed frequency resource and/or sign indicating number resource arbitrarily.
The method that the Radio Resource of second particular sync signal is carried in described selection is: for second particular sync signal of different cycles is distributed different frequency resources and/or sign indicating number resource.
Describedly select the method for the Radio Resource of carrying second particular sync signal to be for each: to preestablish the corresponding relation between the Radio Resource pattern of the Radio Resource pattern of first particular sync signal and one group of second particular sync signal in cycle, according to the Radio Resource pattern of first particular sync signal in each cycle, in the correspondence group, determine the Radio Resource pattern of second particular sync signal in this cycle.
Each sub-district is provided with an above antenna, and then the method for the described emission of step a sub-district particular sync signal further comprises:
For at least one antenna in the Radio Resource pattern of at least one first particular sync signal and/or second particular sync signal and the sub-district is provided with corresponding relation, and launch described first particular sync signal and/or second particular sync signal according to different corresponding relations at different cycles.
The described method that corresponding relation is set is specially:
First particular sync signal in the different cycles and/or second particular sync signal adopt the different antennae emission; Perhaps, first particular sync signal and/or second particular sync signal that takies different frequency in each cycle adopts the different antennae emission; Perhaps, use first particular sync signal of different sign indicating number resource modulation and/or second particular sync signal to adopt the different antennae emission in each cycle.
Set in advance antenna and use sign, then the method for the described modulation of step a sub-district particular sync signal further comprises: utilize antenna to use sign that first particular sync signal and/or second particular sync signal are modulated.
The method that the described receiving terminal of step b obtains synchronizing information is:
Receiving terminal detects the frame head position range of every frame according to first particular sync signal of loop cycle, determines the frame head position and demodulates the synchronizing information of carrying in every frame according to second particular sync signal then.
Transmitting terminal selects the Radio Resource method of patterning to be among the step a: transmitting terminal is that different districts is selected different Radio Resource patterns.
Described Radio Resource comprises frequency resource, time resource, sign indicating number resource, and the combination in any of above-mentioned three kinds of resources.
Described sign indicating number resource is a pseudo noise code, or orthogonal code.
Be provided for indicating the non-sub-district particular sync signal of frame head information in advance for all sub-districts, then before the step a, this method further comprises: transmitting terminal adopts identical Radio Resource to launch described non-sub-district particular sync signal in all sub-districts.
As seen from the above technical solution, realize synchronous method in this wireless communication system of the present invention, comprise the set of an above Radio Resource pattern for the sub-district particular sync signal generates, and be the Radio Resource pattern of a carrying of each cell selecting sub-district particular sync signal.Receiving terminal utilizes this signal to carry out channel estimating after receiving and demodulating the sub-district particular sync signal.That is to say, described sub-district particular sync signal can be carried synchronizing information, can also be used for channel estimating, and transmitting terminal need not after sending the sub-district particular sync signal, special transmitting channel estimated signal is given receiving terminal, so the outer Radio Resource of the unnecessary occupying volume of this method.
In this method, transmitting terminal is that the sub-district particular sync signal of neighbor cell is selected different Radio Resource patterns, makes when receiving terminal utilizes the sub-district particular sync signal to carry out channel estimating, does not have the interference of neighbor cell.
In addition, method of the present invention is divided at least one cycle with each signal frame, and carry the Radio Resource of first particular sync signal for each period allocated, so the time-frequency lattice point that first particular sync signal is distributed in every frame OFDM symbol disperses, thereby can improve the detection speed of receiving terminal to the sub-district particular sync signal.
Further, this method can be provided for indicating the non-sub-district particular sync signal of frame head information in advance for all sub-districts, before the particular sync signal of emission sub-district, transmitting terminal adopts identical Radio Resource to launch described non-sub-district particular sync signal in all sub-districts, to improve synchronous efficiency.
Description of drawings
Fig. 1 is for realizing synchronous flow process among the present invention;
Fig. 2 is the Radio Resource pattern that the sub-district particular sync signal is used in the one embodiment of the invention;
Fig. 3 is the schematic diagram of many antenna emissions sub-district particular sync signal in the one embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Among the present invention,,, need the Radio Resource pattern of the described synchronizing signal of design, make this synchronizing signal can satisfy the anti-interference requirement of channel estimating to save system resource for synchronizing signal is reused in channel estimating.In the following description, the synchronizing signal that is reused in channel estimating is called the sub-district particular sync signal.What Fig. 1 showed is to realize synchronous flow process by the sub-district particular sync signal among the present invention, specifically comprises:
Step 101, comprise the set of an above Radio Resource pattern for sub-district particular sync signal setting in advance.
In this step, the sub-district particular sync signal is divided into first particular sync signal and second particular sync signal again, each signal frame of system is divided at least one cycle, and the Radio Resource pattern of first particular sync signal was set in each cycle.Because Radio Resource comprises frequency resource, time resource, sign indicating number resource, such as pseudo noise code, orthogonal code etc., and the combination in any of above-mentioned three kinds of resources, the Radio Resource that first particular sync signal takies can have different structures, and is not equal such as the frequency difference that adopts, asynchronism(-nization) or sign indicating number.Preferably, can distribute identical frequency resource and sign indicating number resource, make receiving terminal detect first particular sync signal easily for first particular sync signal of different cycles.
Similarly, second particular sync signal is divided according to the periodicity in every frame.In each cycle, second particular sync signal of partly or entirely distributing to of residue Radio Resource is used.Described residue Radio Resource refers to the Radio Resource that takies except first particular sync signal, other Radio Resource in this cycle.In addition, the Radio Resource of second particular sync signal of different cycles structure has nothing in common with each other, and can distinguish the different cycles of signal frame by the Radio Resource structure of correspondence.
Because the Radio Resource that first particular sync signal and/or second particular sync signal take has different structures, so can generate the Radio Resource pattern set of sub-district particular sync signal as required.An instantiation of the Radio Resource pattern that the sub-district particular sync signal is used as shown in Figure 2, per 7 OFDM symbols are divided into a subframe, per 4 subframes are formed one-period, every frame has 5 cycles, the Radio Resource pattern that has only shown first cycle among Fig. 2, the Radio Resource pattern in all the other cycles omits herein.First particular sync signal repeated in each cycle, such as subframe 1 and 5 etc., use to first particular sync signal optional frequency or the sign indicating number resource allocation of the first OFDM symbol of first subframe in each cycle, the grid square among Fig. 2 is distributed to first particular sync signal.Second particular sync signal can take remaining Radio Resource, and the grey square among Fig. 2 is distributed to second particular sync signal.
In addition, there are corresponding relation in the Radio Resource pattern of first particular sync signal and the Radio Resource pattern of a plurality of second particular sync signal, the Radio Resource pattern of promptly corresponding with same first particular sync signal a plurality of second particular sync signal constitutes a group, so, can in the correspondence group, determine the Radio Resource situation that second particular sync signal takies according to the Radio Resource pattern of first particular sync signal.
Step 102, transmitting terminal are Radio Resource pattern of each cell selecting from set set, use the Radio Resource modulation and the emission sub-district particular sync signal of this Radio Resource pattern correspondence.
When each sub-district is provided with an above antenna, the sub-district particular sync signal after the modulation can be launched with different antennae, improve the antijamming capability of signal transmission with the difference decline that utilizes antenna.
Suppose that there are antenna 1 and antenna 2 in certain sub-district, when the particular sync signal of emission sub-district shown in Figure 2, first particular sync signal in each cycle can be launched with different antennae.Concrete allocation example is seen Fig. 3, and the grid square in subframe 1 and the subframe 5 sends with antenna 1, and the vertical bar square sends with antenna 2, and promptly the signal of launching on antenna 1 in the subframe 1 changes by antenna 2 emissions in subframe 5.Perhaps, the grid square of subframe among Fig. 21 is all sent with antenna 1, and the grid square of subframe 5 is all with antenna 2 transmissions.
In the said process, can be that the Radio Resource that takies of first particular sync signal and the antenna in the sub-district are provided with corresponding relation in advance, and launch described first particular sync signal according to different corresponding relations at different cycles.Such as, first particular sync signal that takies different frequency in each cycle adopts the different antennae emission; Perhaps, use first particular sync signal of different sign indicating number resource modulation to adopt different antennae emission etc. in each cycle.
Since can adopt different antennae during the emission of first particular sync signal, can use sign that signal is modulated with antenna, to indicate current antenna operating position.Such as, when adopting many antennas, armed first particular sync signal is multiplied by-1, and when using single antenna, does not take advantage of-1, to distinguish the situation of many antennas and single antenna.
Similarly, also Radio Resource that can take for second particular sync signal and the antenna in the sub-district are provided with corresponding relation, and launch described second particular sync signal at different cycles according to different corresponding relations, do not give unnecessary details herein.
In addition, in order to guarantee that the sub-district particular sync signal can be reused in channel estimating, transmitting terminal need be selected different Radio Resource patterns for the sub-district particular sync signal of neighbor cell, so that can eliminate the interference of channel estimating between the neighbor cell in follow-up process.Transmitting terminal is that the distributing wireless resources for cells method of patterning in the system is comparatively various, can be provided with arbitrarily according to actual needs.
Step 103, receiving terminal obtain synchronizing information by the sub-district particular sync signal that demodulate reception arrives, and utilize this sub-district particular sync signal to carry out the channel estimating of sub-district.
In this step, the process that receiving terminal obtains synchronizing information is specially: at first, detect frame head position possible in every frame according to first particular sync signal of loop cycle.It still is example with Fig. 2, the subframe 1,5,9,13 of every frame and 17 first OFDM symbol are provided with first particular sync signal, suppose that receiving terminal transmits in subframe 4 start receptions, just can detect first particular sync signal in subframe 5 so, thereby determine that subframe 5 is possible frame head position.Subsequently, receiving terminal can also be determined follow-up possible frame head position one by one, such as subframe 9, subframe 13 and subframe 17 etc.And in the prior art, because the OFDM symbol that takies of first particular sync signal is less, if during the receiving terminal start, first particular sync signal of present frame has sent and has finished, and receiving terminal can only wait for that next frame just may listen to first particular sync signal.So the present invention sends the method for first particular sync signal at every frame intercycle, make the particular sync signal of winning distribute to such an extent that disperse, can improve the detection speed of synchronizing information.
Then, determine real frame head position according to second particular sync signal, and demodulate the synchronizing information of carrying in every frame, such as information such as cell scramblings.
Because the Radio Resource pattern of second particular sync signal is relevant with first particular sync signal in each cycle, and the Radio Resource difference that second particular sync signal of different cycles takies, after so receiving terminal receives second particular sync signal, can determine real frame head position by the corresponding relation of second particular sync signal and first particular sync signal.In order to reduce the complexity of receiving end signal demodulation, second particular sync signal of different cycles can only have frequency, time or code word difference.
In this step, the method for demodulation synchronizing information is same as the prior art, does not give unnecessary details herein.
Further, can be provided for indicating the non-sub-district particular sync signal of frame head information in advance for all sub-districts, before the particular sync signal of emission sub-district, transmitting terminal can adopt identical Radio Resource to launch described non-sub-district particular sync signal in all sub-districts, to improve synchronous efficiency.
By the above embodiments as seen, realize synchronous method in this wireless communication system of the present invention, for the sub-district particular sync signal of each sub-district is distributed different Radio Resource patterns, and the sub-district particular sync signal is reused in channel estimating, thereby saves the Radio Resource that pilot signal takies.In addition, this method is divided at least one cycle with each signal frame, and carries the Radio Resource of first particular sync signal for each period allocated, so improve the detection speed of receiving terminal to the sub-district particular sync signal.
Claims (13)
1, realizes synchronous method in a kind of wireless communication system, it is characterized in that, the sub-district particular sync signal is divided into first particular sync signal and second particular sync signal, and each signal frame is divided at least one cycle;
Carry the Radio Resource of first particular sync signal for each period allocated, and the Radio Resource of second particular sync signal is carried in selection in the residue Radio Resource in corresponding cycle, obtain the set of the Radio Resource pattern of an above sub-district particular sync signal, this method comprises:
A, transmitting terminal are Radio Resource pattern of each cell selecting from set set, by the Radio Resource modulation and the emission sub-district particular sync signal of this Radio Resource pattern correspondence;
B, receiving terminal obtain synchronizing information by the sub-district particular sync signal that demodulate reception arrives, and utilize this sub-district particular sync signal to carry out channel estimating.
2, method according to claim 1 is characterized in that, the method that the Radio Resource of first particular sync signal is carried in described distribution is: for first particular sync signal of different cycles is distributed identical frequency resource and sign indicating number resource.
3, method according to claim 1, it is characterized in that, described method of carrying the Radio Resource of first particular sync signal for each period allocated is: use to first particular sync signal first OFDM allocation of symbols in each cycle, and be that first particular sync signal that takies first OFDM symbol is distributed frequency resource and/or sign indicating number resource arbitrarily.
4, method according to claim 1 is characterized in that, the method that the Radio Resource of second particular sync signal is carried in described selection is: for second particular sync signal of different cycles is distributed different frequency resources and/or sign indicating number resource.
5, method according to claim 1, it is characterized in that, describedly select the method for the Radio Resource of carrying second particular sync signal to be for each: to preestablish the corresponding relation between the Radio Resource pattern of the Radio Resource pattern of first particular sync signal and one group of second particular sync signal in cycle, according to the Radio Resource pattern of first particular sync signal in each cycle, in the correspondence group, determine the Radio Resource pattern of second particular sync signal in this cycle.
According to each described method of claim 1 to 5, it is characterized in that 6, each sub-district is provided with an above antenna, then the method for the described emission of step a sub-district particular sync signal further comprises:
For at least one antenna in the Radio Resource pattern of at least one first particular sync signal and/or second particular sync signal and the sub-district is provided with corresponding relation, and launch described first particular sync signal and/or second particular sync signal according to different corresponding relations at different cycles.
7, method according to claim 6 is characterized in that, the described method that corresponding relation is set is specially:
First particular sync signal in the different cycles and/or second particular sync signal adopt the different antennae emission; Perhaps, first particular sync signal and/or second particular sync signal that takies different frequency in each cycle adopts the different antennae emission; Perhaps, use first particular sync signal of different sign indicating number resource modulation and/or second particular sync signal to adopt the different antennae emission in each cycle.
8, method according to claim 6, it is characterized in that, set in advance antenna and use sign, then the method for the described modulation of step a sub-district particular sync signal further comprises: utilize antenna to use sign that first particular sync signal and/or second particular sync signal are modulated.
9, method according to claim 1 is characterized in that, the method that the described receiving terminal of step b obtains synchronizing information is:
Receiving terminal detects the frame head position range of every frame according to first particular sync signal of loop cycle, determines the frame head position and demodulates the synchronizing information of carrying in every frame according to second particular sync signal then.
10, method according to claim 1 is characterized in that, transmitting terminal selects the Radio Resource method of patterning to be among the step a: transmitting terminal is that different districts is selected different Radio Resource patterns.
11, method according to claim 1 is characterized in that, described Radio Resource comprises frequency resource, time resource, sign indicating number resource, and the combination in any of above-mentioned three kinds of resources.
12, method according to claim 11 is characterized in that, described sign indicating number resource is a pseudo noise code, or orthogonal code.
13, method according to claim 1, it is characterized in that, be provided for indicating the non-sub-district particular sync signal of frame head information in advance for all sub-districts, then before the step a, this method further comprises: transmitting terminal adopts identical Radio Resource to launch described non-sub-district particular sync signal in all sub-districts.
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| CN 200510118313 CN1956431A (en) | 2005-10-28 | 2005-10-28 | Method for implementing synchronous of radio communication system |
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| CN103379079A (en) * | 2012-04-28 | 2013-10-30 | 中兴通讯股份有限公司 | Method and device for sending synchronizing signals |
| CN103828398A (en) * | 2013-07-26 | 2014-05-28 | 华为终端有限公司 | Carrying method and user device of synchronous signals |
| CN104427527A (en) * | 2013-08-22 | 2015-03-18 | 中国移动通信集团公司 | A method and apparatus for transmitting a discovery symbol, and for finding a Small Cell by a terminal |
| CN104813625A (en) * | 2013-07-26 | 2015-07-29 | 华为终端有限公司 | Synchronization signal bearing method and user equipment |
| CN104823496A (en) * | 2012-11-04 | 2015-08-05 | Lg电子株式会社 | Method for transmitting/receiving synchronizing signals in wireless communication system and device therefor |
| US10750463B2 (en) | 2016-03-31 | 2020-08-18 | China Academy Of Telecommunications Technology | Method and device for identifying synchronization priority |
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- 2005-10-28 CN CN 200510118313 patent/CN1956431A/en active Pending
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| WO2013159437A1 (en) * | 2012-04-28 | 2013-10-31 | 中兴通讯股份有限公司 | Sending method and device for synchronization signal |
| CN103379079A (en) * | 2012-04-28 | 2013-10-30 | 中兴通讯股份有限公司 | Method and device for sending synchronizing signals |
| CN103379079B (en) * | 2012-04-28 | 2017-11-07 | 中兴通讯股份有限公司 | The sending method and device of a kind of synchronizing signal |
| CN104823496A (en) * | 2012-11-04 | 2015-08-05 | Lg电子株式会社 | Method for transmitting/receiving synchronizing signals in wireless communication system and device therefor |
| CN104823496B (en) * | 2012-11-04 | 2019-04-23 | Lg 电子株式会社 | The method and its equipment of synchronization signal are sent/received in a wireless communication system |
| WO2015010337A1 (en) * | 2013-07-26 | 2015-01-29 | 华为终端有限公司 | Synchronization signal bearing method and user equipment |
| CN104813625A (en) * | 2013-07-26 | 2015-07-29 | 华为终端有限公司 | Synchronization signal bearing method and user equipment |
| CN104813625B (en) * | 2013-07-26 | 2017-04-19 | 华为终端有限公司 | Synchronization signal bearing method and user equipment |
| WO2015010542A1 (en) * | 2013-07-26 | 2015-01-29 | 华为终端有限公司 | Synchronization signal bearing method and user equipment |
| CN103828398A (en) * | 2013-07-26 | 2014-05-28 | 华为终端有限公司 | Carrying method and user device of synchronous signals |
| US10548105B2 (en) | 2013-07-26 | 2020-01-28 | Huawei Device Co., Ltd. | Synchronization signal carrying method and user equipment |
| US10986598B2 (en) | 2013-07-26 | 2021-04-20 | Huawei Device Co., Ltd. | Synchronization signal carrying method and user equipment |
| CN104427527A (en) * | 2013-08-22 | 2015-03-18 | 中国移动通信集团公司 | A method and apparatus for transmitting a discovery symbol, and for finding a Small Cell by a terminal |
| US10750463B2 (en) | 2016-03-31 | 2020-08-18 | China Academy Of Telecommunications Technology | Method and device for identifying synchronization priority |
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