CN106161317A - A kind of synchronous method and device - Google Patents

Abstract

The present invention relates to communication technical field, particularly relate to a kind of synchronous method and device, on the carrier wave of unauthorized frequency range, set up initial synchronisation with base station in order to realize UE.The synchronous method that the embodiment of the present invention provides includes: base station configures the first synchronous reference signal；Described base station is on the complete orthogonal frequency division multiplex OFDM symbol of first the initial time from the member carrier CC taking unauthorized frequency range, send described first synchronous reference signal of configuration, carry out initial synchronisation for user equipment (UE) with described member carrier CC.

Description

A kind of synchronous method and device

Technical field

The present invention relates to communication technical field, particularly relate to a kind of synchronous method and device.

Background technology

Along with the surge of data traffic in mobile Internet, unauthorized frequency range uses Long Term Evolution (Long Term Evolution, LTE) technology becomes development trend.Unauthorized frequency range for all of operation commercial city is Open, different operators has identical right and disposes LTE in unauthorized frequency range.In order to make different system Or the fair competition of different operator uses unauthorized frequency range, introduce listem-before-talk (listen before talk, LBT) Mechanism, i.e. before carrying out data transmission, first reserving a period of time carries out perception to carrier wave, carries out sky every time Channel assessment (Clear Channel Assessment, CCA) process, can be with just opening when perceiving carrier wave Beginning carries out data transmission, and carries out data transmission the restriction having maximum duration every time.

In order to ensure the reliability of business transmission in unauthorized frequency range, mandate frequency range auxiliary can be used unauthorized Frequency range carries out business transmission, bandwidth resources abundant with unauthorized frequency range for the reliability authorizing frequency range is combined, Throughput of system is promoted while ensureing business transmission reliability.Specifically, in order to ensure that LTE awards non- The performance of power frequency range, current protocol requirement uses carrier aggregation (Carrier Aggregation, CA) or double The mode connected uses LTE technology in unauthorized frequency range.In CA mode, the carrier wave in frequency range will be authorized As main carrier, using the carrier wave in unauthorized frequency range as subcarrier, it is achieved under authorizing frequency range auxiliary Unauthorized frequency range access way, auxiliary authorizes and accesses (Licensed Assisted Access, LAA).

Realize Time and Frequency Synchronization demodulation of downlink signal correct to subscriber equipment (User Equipment, UE) It is necessary.Time and Frequency Synchronization can be divided into initial synchronisation (slightly synchronizing) and synchronized tracking (precise synchronization) two Individual process.In LTE system, devise 2 kinds of DRS (Dedicated Reference Signal)s, the most main synchronization for initial synchronization Signal (Primary Synchronization Signal, PSS) and auxiliary synchronous signals (Secondary Synchronization Signal, SSS).UE is sent out by capture base station (evolved Node B, eNB) PSS and SSS sent, carries out initial synchronisation with eNB, i.e. sets up initial Time and Frequency Synchronization.PSS and SSS It is all periodic signal, there is clear and definite time-domain and frequency-domain structure.The spatial structure of PSS and SSS be The dual-mode of system is relevant；As it is shown in figure 1, FDD (Frequency Division Duplexing, FDD), in pattern, PSS signal is mapped to last OFDM of time slot 0 and time slot 10 On (Orthogonal Frequency Division Multiplexing, OFDM) symbol, SSS is mapped to In the previous OFDM symbol of PSS；As in figure 2 it is shown, time division duplex (Time-Division Duplexing, TDD), in pattern, PSS signal is mapped in the 3rd OFDM symbol of time slot 2 and time slot 12, SSS signal is mapped in last OFDM symbol of time slot 1 and time slot 11, will map by SSS The 3rd OFDM symbol position before PSS.

Under the carrier aggregation mode of existing mandate frequency range, subcarrier is respectively positioned on mandate frequency range, and auxiliary carries The resource of ripple is that base station can control, and therefore base station can ensure that with the frame structure format of existing protocol definition It is transmitted.And in transmission based on LAA, for taking the subcarrier of unauthorized frequency range, due to By the fair competition of institute of each operator, the carrier wave first detecting this unauthorized frequency range was first needed to be before accessing The no free time, if idle, then can use the carrier wave of this unauthorized frequency range, otherwise, need to wait until this load Ripple is in idle condition and just can use.

The carrier wave of unauthorized frequency range be in that moment of idle condition is probably in a wireless sub-frame any time Between position, as it is shown on figure 3, CA technology require main carrier align with the subframe of subcarrier, namely The radio frames start time of subcarrier needs identical with main carrier, and available unauthorized frequency range is competed in base station The time location of carrier wave be not likely sub-frame boundary, imperfect subframe occurs, at this imperfect son The opportunity sending above-mentioned synchronizing signal may not had in frame.In addition, the load of unauthorized frequency range is used Ripple carries out data transmission the restriction having maximum duration, and maximum duration typically only has about 4ms, whole In big duration, it is possible to all without the opportunity of the above-mentioned transmission synchronizing signal of regulation in agreement occurs.

To sum up, the synchronization mechanism for the carrier wave authorizing frequency range has not been suitable between UE and base station awarding non- Initial synchronisation is set up on the carrier wave of power frequency range.

Summary of the invention

The embodiment of the present invention provides a kind of synchronous method and device, in order to realize UE with base station at unauthorized frequency Initial synchronisation is set up on the carrier wave of section.

The embodiment of the present invention provides a kind of synchronous method, including:

Base station configures the first synchronous reference signal；

The initial time from the member carrier CC taking unauthorized frequency range first of described base station is complete Orthogonal frequency division multiplex OFDM symbol on, send configuration described first synchronous reference signal, be used for Family equipment UE and described member carrier CC carry out initial synchronisation.

Alternatively, base station configures the first synchronous reference signal, including:

Base station is the sequence after described first synchronous reference signal configuration uses cell ID ID scrambling.

Alternatively, described community ID is that corresponding for the member carrier CC physical layer of described unauthorized frequency range is little District ID；Or, described community ID is that the member carrier CC of the mandate frequency range that described base station takies is corresponding Physical-layer cell ID.

Alternatively, before described base station configures described first synchronous reference signal, also include:

Described base station indicates for adding to user equipment (UE) on the member carrier CC of the mandate frequency range taken Disturb the described cell ID ID of the sequence of described first synchronous reference signal.

Alternatively, described base station is after described first synchronous reference signal configuration uses cell ID ID scrambling Sequence, including:

Described base station sequential design form based on the auxiliary synchronous signals SSS sent in mandate frequency range, and The community ID for scrambling preset, configures the sequence of described first synchronous reference signal；Or, described base Stand based on the default community ID for scrambling, generate the sequence of the first synchronous reference signal, this first synchronization The band that reference signal takies is wider than in the bandwidth authorizing the auxiliary synchronous signals SSS sent in frequency range to take.

Alternatively, described base station configures the first synchronous reference signal, including:

The configuration of described base station carries the first synchronous reference signal of instruction information.

Alternatively, described instruction information is for the control letter of instruction transmission after this first synchronous reference signal Breath.

Alternatively, described method also includes:

If described first synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described first synchronous reference signal in described first complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

Alternatively, described method also includes:

Described base station configures the second synchronous reference signal；

Described base station is at the complete orthogonal frequency division multiplex OFDM symbol of second from described initial time Described second synchronous reference signal of upper transmission, identifies the member carrier of described unauthorized frequency range for adjacent cell CC is taken by described base station.

Alternatively, described base station configures the second synchronous reference signal, including:

Described base station is based on authorizing the sequential design form of the master sync signal PSS sent in frequency range, configuration The sequence of described second synchronous reference signal；Or, generating the sequence of the second synchronous reference signal, this is second years old The band that synchronous reference signal takies is wider than at the band authorizing the master sync signal PSS sent in frequency range to take Wide.

Alternatively, the sequence of described second synchronous reference signal carries instruction information.

Alternatively, described instruction information is for the control letter of instruction transmission after this second synchronous reference signal Breath.

Alternatively, described first synchronous reference signal and the second synchronous reference signal carry described unauthorized frequency The information of physical-layer cell ID corresponding for member carrier CC of section, described first synchronous reference signal and the Two synchronous reference signals carry out cell searching for adjacent cell user equipment (UE).

Alternatively, after described base station sends described second synchronous reference signal, also include:

If described second synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described second synchronous reference signal in described second complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

Another embodiment of the present invention provides a kind of synchronous method, including:

The first synchronization ginseng that user equipment (UE) capture base station sends on the member carrier CC of unauthorized frequency range Examine signal；Described first synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range Send on first complete orthogonal frequency division multiplex OFDM symbol that initial time rises；

Described UE described first synchronous reference signal based on capture, enters with the CC of described unauthorized frequency range Row initial synchronisation.

The embodiment of the present invention provides a kind of synchronizer, including:

Configuration module, for configuration the first synchronous reference signal；

Sending module, for the initial time of the member carrier CC taking unauthorized frequency range from base station On first complete orthogonal frequency division multiplex OFDM symbol, send the described first reference synchronization letter of configuration Number, carry out initial synchronisation for user equipment (UE) with described member carrier CC.

Another embodiment of the present invention provides a kind of synchronizer, including:

Trapping module, for capturing the first synchronization that base station sends on the member carrier CC of unauthorized frequency range Reference signal；Described first synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range First complete orthogonal frequency division multiplex OFDM symbol rising of initial time on send；

Synchronization module, for described first synchronous reference signal captured based on described trapping module, with described The CC of unauthorized frequency range carries out initial synchronisation.

In the embodiment of the present invention, after base station configures the first synchronous reference signal, from taking unauthorized frequency range On first complete orthogonal frequency division multiplex OFDM symbol that the initial time of member carrier CC rises, send Described first synchronous reference signal of configuration, such that it is able to realize UE and the base station carrier wave in unauthorized frequency range On set up initial synchronisation.

Accompanying drawing explanation

Fig. 1 is synchronizing signal spatial structure schematic diagram in the fdd mode；

Fig. 2 is synchronizing signal spatial structure schematic diagram in tdd mode；

Fig. 3 is main carrier and the subframe alignment schematic diagram of subcarrier in CA；

The synchronous method flow chart that Fig. 4 provides for the embodiment of the present invention one；

Fig. 5 is under authorizing the auxiliary of CC of frequency range, carries out the data transmission on the CC of unauthorized frequency range Schematic diagram；

The synchronous method flow chart that Fig. 6 provides for the embodiment of the present invention two；

The synchronous method flow chart that Fig. 7 provides for the embodiment of the present invention three；

The synchronous method flow chart that Fig. 8 provides for the embodiment of the present invention four；

Fig. 9 is the schematic diagram carried out data transmission on the CC of unauthorized frequency range；

The synchronizer structural representation that Figure 10 provides for the embodiment of the present invention five；

The synchronizer structural representation that Figure 11 provides for the embodiment of the present invention six.

Detailed description of the invention

In the embodiment of the present invention, after base station configures the first synchronous reference signal, from taking unauthorized frequency range First complete orthogonal frequency division multiplexing that the initial time of member carrier (Component Carrier, CC) rises With in OFDM symbol, send described first synchronous reference signal of configuration, such that it is able to realize UE and base Stand in and set up initial synchronisation on the carrier wave of unauthorized frequency range.

Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.

Embodiment one

As shown in Figure 4, the synchronous method flow chart provided for the embodiment of the present invention one, comprise the following steps:

S401: base station configures the first synchronous reference signal.

S402: base station is from the member carrier (Component Carrier, CC) taking unauthorized frequency range On first complete orthogonal frequency division multiplex OFDM symbol that initial time rises, send described the of configuration One synchronous reference signal, carries out initial synchronisation for user equipment (UE) with described member carrier CC.

In being embodied as, base station is after successfully taking certain member carrier CC of unauthorized frequency range, if accounting for The boundary position that initial time is complete OFDM symbol, then can send the first reference synchronization immediately First signal, if the initial time taken is not the boundary position of OFDM symbol, then can send and be used for Take the placeholder (Preamble) of this CC, after the boundary position arriving complete OFDM symbol, then Send the first synchronous reference signal.UE is after capturing this first synchronous reference signal, and sets up between base station Initial synchronisation, i.e. time-frequency slightly synchronize.

Alternatively, described method also includes:

If described first synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described first synchronous reference signal in described first complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

In specific implementation process, if the first synchronous reference signal does not take the unauthorized frequency that base station takies The total bandwidth of the member carrier CC of section, then can be remaining in described first complete OFDM symbol Send other reference signal in frequency domain resource, such as, send cell specific reference signal (Cell-Specific Reference Signal, CRS), channel state information reference signals (CSI Reference Signals, CSI-RS) one or more, in location reference signals (Positioning Reference Signal, PRS), UE realizes the synchronization of time-frequency essence by these reference signals carry out synchronized tracking.

Alternatively, in S401, base station configures the first synchronous reference signal, including:

Base station is that described first synchronous reference signal configuration uses cell ID (Cell Identity, Cell ID) Sequence after scrambling.

In specific implementation process, in order to make UE fast Acquisition to the first synchronous reference signal, can be by One synchronizes reference credit binds with Cell ID, and UE is by mating specific Cell ID fast Acquisition to first Synchronous reference signal.

Alternatively, UE can obtain the Cell ID for scrambling the first synchronous reference signal in the following manner:

Before described base station configures described first synchronous reference signal, at the member carrier of the mandate frequency range taken CC is upper is used for scrambling the Cell ID of the sequence of described first synchronous reference signal to UE instruction.

In specific implementation process, base station can refer to UE at the member carrier CC of the mandate frequency range taken Show some prior informations of the member carrier CC of unauthorized frequency range to be taken, such as, this unauthorized frequency range The Cell ID corresponding to member carrier CC (in current 3GPP standard, each CC has independent Community ID), the mid frequency of this CC and bandwidth, and the candidate sequence collection of the sequence of this CC or this CC Close (this CC finally uses a sequence in collection of candidate sequences)；UE can also know that base station is authorizing Cell ID corresponding to CC in frequency range.UE is the most ignorant is exactly descending (Down link, DL) The opportunity of the actual transmission of data, it is therefore desirable to carry out signal capture.In reality is implemented, base station can account for Mandate frequency range member carrier CC on explicitly indicate described cell ID to UE by signaling, it is also possible to Indicate described cell ID to UE implicit expression, such as, make an appointment for scrambling the first reference synchronization letter with UE Number cell ID and corresponding for the member CC cell ID authorizing frequency range between relation, UE is based on authorizing frequency The cell ID corresponding to member CC of section determines the cell ID for scrambling the first synchronous reference signal.

Alternatively, described community ID is that corresponding for the member carrier CC physical layer of described unauthorized frequency range is little District ID；Or, described community ID is that the member carrier CC of the mandate frequency range that described base station takies is corresponding Physical-layer cell ID.

In specific implementation process, the community ID of scrambling on the first synchronous reference signal, can be that carrying should The Cell ID corresponding for CC of the unauthorized frequency range of the first synchronous reference signal, or the mandate that base station takies The Cell ID that the carrier wave of frequency range is corresponding.Under front kind of mode, UE is required for each CC and produces one Local recurring sequence (using cell ID corresponding for this CC to scramble this sequence)；And for rear kind of mode, UE Have only to produce a local recurring sequence (the cell ID corresponding to main carrier of the mandate frequency range that employing takies Scrambling), the process complexity of UE can be reduced.In addition, in the unauthorized frequency range that base station takies The time of all CC is Complete Synchronization, when using the Cell ID corresponding to the main carrier authorized in frequency range When scrambling the first synchronous reference signal, UE is when CC is intercepted in needs replacing, it is not necessary to adjust local timing And base band capture process, it is only necessary to revising down converted frequencies at radio frequency, other CC allowing replacing intercept falls In base band capture process.Therefore, rear kind mode is that the time-frequency acquisition algorithm of UE provides bigger Optimize space, be preferred mode.

Alternatively, in S401, base station can be based on the sequence of the SSS sent on the CC authorizing frequency range The sequence of row design the first synchronous reference signal, it is also possible to additionally design new sequence so that it is account on frequency domain By bigger bandwidth；Cell ID ID is used to add that is, base station is described first synchronous reference signal configuration Sequence after disturbing, including:

Described base station sequential design form based on the auxiliary synchronous signals SSS sent in mandate frequency range, and The community ID for scrambling preset, configures the sequence of described first synchronous reference signal；Or, described base Stand based on the default community ID for scrambling, generate the sequence of the first synchronous reference signal, this first synchronization The band that reference signal takies is wider than in the bandwidth authorizing the auxiliary synchronous signals SSS sent in frequency range to take.

Here, in order to thought that the embodiment of the present invention design the sequence of first synchronous reference signal is better described, Introduce under first traditional synchronizing signal being made:

Authorize frequency range CC on send PSS and SSS carry community find and time-frequency slightly synchronize this two Item function.UE needs by blind check PSS and SSS signal, it is thus achieved that cell ID information.Wherein, community IDSpan be 0～503.UE identifies community ID for convenience, willResolve into thing Li Ceng community ID group numberWith No. ID in the ID group of each physical-layer cellTwo parts, i.e.WhereinSpan be 0～167,Span 0～2.

PSS has 3 candidate sequences, specifically take which value withRelevant.UE firstly the need of capture PSS, Gone out by matching operation blind checkSet up with base station by PSS time-frequency the most synchronize after, UE goes again Coupling SSS.?On the premise of known a priori, SSS has 168 candidate sequences, and therefore UE needs logical Cross and carry out the operation of 168 relevant matches and could blind check go outSignal, but have built up during due to blind check SSS Time-frequency slightly synchronizes, therefore the complexity of the blind check SSS complexity far below blind check PSS.Visible, UE Joining synchronizing signal and include time domain coupling and sequences match, wherein, the process complexity of time domain coupling is more than sequence The process complexity of coupling.

When UE captures the PSS of traditional mandate frequency range, need from 3 candidate sequences, carry out blind check.And In embodiments of the present invention, scramble the first synchronous reference signal owing to have employed community ID known to UE, UE is only with one known array of coupling, and therefore the embodiment of the present invention carries out the process complexity of synchronization acquistion and is The 1/3 of the process complexity of tradition capture PSS.

It practice, in order to simplify synchronizing signal capture, at Wireless Fidelity (WIreless Fidelity, WIFI) In system, the synchronizing signal on all of CC all uses identical sequence, i.e. scrambles without cell ID.? Under this mode, after capturing synchronizing signal, UE also needs to the data after demodulation synchronization signal, based on The data that demodulation obtains could judge whether these data are intended for oneself.If LAA also uses with above-mentioned Synchronization signal designs mode identical for WIFI, i.e. scrambles the first synchronous reference signal without cell ID, then UE is after capturing the first synchronous reference signal, in addition it is also necessary to attempt blind check after the first synchronous reference signal Downlink Control Information (Downlink Control Information, DCI), could judge based on this DCI Whether the downlink data going out base station transmission is intended for oneself.For UE, blind check DCI is a ratio More complicated data processing operation, can cause bigger process expense.Therefore, the embodiment of the present invention is authorizing Under the auxiliary of the main carrier of frequency range, it is possible to use the Cell ID scrambling being indicated to UE by main carrier is awarded non- The first synchronous reference signal sent on the CC of power frequency range.So, UE can only capture by known Cell The synchronizing signal of ID scrambling, simplifies the process complexity of capture synchronizing signal.Use this scrambling mode, While reducing the complexity of UE detection synchronizing signal, moreover it is possible to ensure that UE will not be incorrectly connected to it On its base station.

In being embodied as, it is also possible to synchronizing signal is used as information carrier, specifically, in S101, Base station can configure the first synchronous reference signal carrying instruction information；This instruction information can serve to indicate that The control information of transmission after this first synchronous reference signal.

In being embodied as, the mode of the first synchronous reference signal carrying instruction information is the difference by using Sequence indicate different information, specifically, base station can be first synchronous reference signal one time of configuration Select arrangement set, which candidate sequence of the specifically chosen transmission in base station as the sequence of the first synchronous reference signal, Depend on the instruction information of extra bearer.Certainly, these candidate sequences are all by community ID known to UE Scrambling.Accordingly, UE is on the premise of the ID of known cell, in candidate's sequence of locally generated several reproductions Row, the i.e. collection of candidate sequences of base station configuration, by itself and reception signal correction, therefrom blind check goes out unique correct Candidate sequence come, the numbering of the correct candidate sequence that blind check goes out is corresponding to specific instruction information.

Such as, if base station sequential design form based on the SSS sent on the CC authorizing frequency range, and The community ID for scrambling preset, configures the sequence of described first synchronous reference signal, then first synchronizes letter Number sequence may is that

${\mathrm{SYNC}}_1(n:N_{\mathrm{ID}}^{\mathrm{cell}},I)=\mathrm{SSS}(n:N_{\mathrm{ID}}^{\mathrm{cell}})c(n:I)$

Wherein, n is sequence numbering,It is the information of carrying on the first synchronous reference signal for cell ID, I, SSS () is the sequential design form of the SSS sent on the CC authorizing frequency range, and c () is certain scramble function. Such as, c () can be m-sequenceCertain cyclic shift, wherein, X is positive integer, such as X=62；0≤i≤X-1, here it is possible to by displacement Depositor generates x (i), and the polynomial expression of shift register is: x (n+31)=(x (n+3)+x (n)) mod2, The initial value x of shift register₁(0)=1, x₁(n)=0, n=1,2 ..., 30.

In specific implementation process, the instruction information of the first synchronous reference signal carrying can include following information In one or more: for indicating the information of follow-up presence or absence the second synchronous reference signal；For (the second synchronous reference signal belongs to LAA and controls signaling to indicate follow-up presence or absence LAA to control signaling One) information；If the follow-up LAA that exists controls signaling, this LAA is indicated to control the symbol that signaling takies The information etc. of number length.

In specific implementation process, base station can determine to send out opportunity based on the CC that unauthorized frequency range is arrived in competition Whether the first synchronous reference signal sent including, LAA controls signaling.If competition is to unauthorized frequency range The next sub-frame boundary of distance on opportunity of CC closely (next sub-frame boundary X=4 of such as distance OFDM symbol), then after removing the OFDM symbol at the first synchronous reference signal place, distance is next Sub-frame boundary is only left 4-1=3 complete OFDM symbol, is not enough to support effective downlink data transmission. At this moment these 3 complete OFDM symbol can be used for transmit LAA and control signaling.On the other hand, as Fruit competition is distant (such as apart from next to the next sub-frame boundary of distance on opportunity of the CC of unauthorized frequency range X=10 OFDM symbol of individual sub-frame boundary), then remove the OFDM at the first synchronous reference signal place After symbol, there remains 10-1=9 OFDM symbol, these resources can support that effective downlink data passes Defeated, at this moment can not transmit LAA and control signaling, directly transmit downlink data.

In addition to the first synchronous reference signal, the embodiment of the present invention can also be in the unauthorized frequency range taken CC upper transmission the second synchronous reference signal, finds the occupied sensitivity of this CC in order to improve adjacent base station.

Specifically, described method also includes:

Described base station configures the second synchronous reference signal；

Described base station is at the complete orthogonal frequency division multiplex OFDM symbol of second from described initial time Described second synchronous reference signal of upper transmission, identifies the member carrier of described unauthorized frequency range for adjacent cell CC is taken by described base station.

Alternatively, after described base station sends described second synchronous reference signal, also include:

If described second synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described second synchronous reference signal in described second complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

In specific implementation process, if the second synchronous reference signal does not take the unauthorized frequency that base station takies The total bandwidth of the member carrier CC of section, then can be remaining in described second complete OFDM symbol Send other reference signal in frequency domain resource, such as, send cell specific reference signal (Cell-Specific Reference Signal, CRS), channel state information reference signals (CSI Reference Signals, CSI-RS) one or more, in location reference signals (Positioning Reference Signal, PRS), UE realizes the synchronization of time-frequency essence by these reference signals carry out synchronized tracking.

Alternatively, in above-mentioned steps, base station can be based on the PSS sent on the CC authorizing frequency range The sequence of sequential design the second synchronous reference signal, it is also possible to additionally design new sequence so that it is on frequency domain Take bigger bandwidth；That is, described base station configures the second synchronous reference signal, including:

Described base station is based on authorizing the sequential design form of the master sync signal PSS sent in frequency range, configuration The sequence of described second synchronous reference signal；Or, generating the sequence of the second synchronous reference signal, this is second years old The band that synchronous reference signal takies is wider than at the band authorizing the master sync signal PSS sent in frequency range to take Wide.

Alternatively, the sequence of described second synchronous reference signal carries instruction information, and described instruction information can For instruction control information of transmission after this second synchronous reference signal.

In being embodied as, the sequence of the second synchronous reference signal can be bound with community ID, permissible It is that the second synchronous reference signal designs multiple candidate sequences, for carrying different instruction information, in configuration the During two synchronous reference signals, instruction information based on needs carrying, from candidate sequence, select the sequence of correspondence； This instruction information can include indicate subsequent transmission LAA control signaling symbol lengths information or Including other parameter defined in standardization, or can use after keeping for, or keep for producer to make With etc..Such as, when synchronizing ginseng based at the sequential design form design second authorizing the PSS sent in frequency range When examining signal, can be by this second synchronous reference signal and No. ID in groupBinding, it is also possible to not by it WithBinding.When not by the second synchronous reference signal withDuring binding, can be believed by the second reference synchronization Number candidate sequence select carry some extra instruction information；Here, due to reference to PSS second with The candidate sequence one of step reference signal has 3, the most at most can carry 3 instruction information.

Below, effect and design to the embodiment of the present invention the second synchronous reference signal are described further:

The second synchronous reference signal in the embodiment of the present invention is mainly used in improving base station and the UE of neighbor cell Finding the occupied sensitivity of this CC, to avoid interference, technological thought is as follows:

When needing the member carrier CC taking unauthorized frequency range, need by Blind channel spare time state aware skill The busy-idle condition current for CC that art perception is to be taken, namely carry out clear channel assessment (CCA) detection (Clear Channel Assessment, CCA) process.Presently, there are two kinds of CCA detection techniques, including energy measuring And signal detection；Compared with energy measuring, signal detection has higher perceptual sensitivity.For signal detection, Test side is it is to be appreciated that signal sending end sends the form of signal, then at the signal that this locality reproduction is identical, logical Cross coherent reception to judge whether the transmission signal paid close attention to exists, and whether the reception power of this signal exceeds The reception power threshold preset.

In the embodiment of the present invention, in order to make UE fast Acquisition to the first synchronous reference signal, use community ID Scramble this first synchronous reference signal.This is because the span of community ID is 0～503, if UE does not has Having the prior information obtaining community ID, capturing this first synchronous reference signal will be extremely difficult.Also because Having carried out community ID scrambling, the first synchronous reference signal does not support that the base station of adjacent cell and UE carry out signal The CCA detection of rank.Therefore, the embodiment of the present invention devises the second synchronous reference signal, to support The base station of adjacent cell and UE carry out the CCA inspection of signal rank to the CC of this transmission the first synchronous reference signal Survey.

Further, base station and UE for the ease of neighbor cell capture this second synchronous reference signal, Second synchronous reference signal should comprise some all of information being easy to capture, the such as second synchronous reference signal Sequence can be unrelated for Shi Yiduanyu community ID fixing sequence, or comprise lesser amt from one The sequence selected in the collection of candidate sequences of sequence.When the sequence of the second synchronous reference signal is to comprise from one During the sequence selected in the collection of candidate sequences of lesser amt sequence, the second synchronous reference signal can be passed through Carry some extra instruction information, i.e. different sequence in collection of candidate sequences and carry different instruction letters Breath.

In foregoing description content it is stated that, the first synchronous reference signal can design based on SSS, second with Step reference signal can design based on PSS, when holding in the first synchronous reference signal and the second synchronous reference signal When being loaded with cell ID information, the UE of adjacent cell can carry out cell searching based on the two synchronizing signal. It is described as follows:

It practice, in unauthorized frequency range, carry out cell searching it is not necessary to.When base station operation is carrying In ripple polymerization (CA, Carrier Aggregation) or dual link (Dual Connection, DC) pattern Time, UE can be linked in the CC of unauthorized frequency range under authorizing the auxiliary of member carrier CC of frequency range. UE carries out the premise of downlink communication on the CC of unauthorized frequency range, and UE is at the CC authorizing frequency range Setting up between upper success and base station and be connected, so, UE can transmit on the CC of the mandate frequency range received Information instruction under on the CC of certain unauthorized frequency range, intercept the downlink data packet being sent to oneself, as Shown in Fig. 5.

The UE of adjacent cell the first synchronous reference signal based on above-mentioned carrying community ID and the second reference synchronization Signal carries out the mode of cell searching and may is that

Adjacent cell user equipment (UE) is after confirming to capture described second synchronous reference signal, from relief area Extract described first synchronous reference signal of caching；

Described adjacent cell UE is based on carrying in described first synchronous reference signal and the second synchronous reference signal Information, determines described first synchronous reference signal and cell ID ID corresponding to the second synchronous reference signal.

In specific implementation process, the UE of adjacent cell can cache the number of two OFDM symbol carryings every time According to, confirm capture withAfter second synchronous reference signal of binding, then go to extract from relief area An OFDM symbol adjacent with the OFDM symbol carrying this second synchronous reference signal, therefrom recovers Go out to use the first synchronous reference signal that community ID scrambles；Synchronize based on the first synchronous reference signal and second The information of carrying in reference signal, it may be determined that the first synchronous reference signal and the second synchronous reference signal are held The community ID carried.

Embodiment two

The following is synchronous method based on UE side, the most superfluous in place of being embodied as repeating with above-described embodiment one State.

As shown in Figure 6, the synchronous method flow chart provided for the embodiment of the present invention two, including:

The first reference synchronization that S601:UE capture base station sends on the member carrier CC of unauthorized frequency range Signal；Described first synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range Send on first complete orthogonal frequency division multiplex OFDM symbol that moment beginning rises.

S602:UE described first synchronous reference signal based on capture, with the CC of described unauthorized frequency range Carry out initial synchronisation.

Alternatively, user equipment (UE) capture base station sends on the CC of unauthorized frequency range described first together Step reference signal, including:

Described UE receives for scrambling the first synchronous reference signal on the member carrier CC authorizing frequency range The cell ID ID of sequence；

Described UE based on described community ID, capture base station send on the CC of unauthorized frequency range described the One synchronous reference signal.

Alternatively, described community ID is that corresponding for the member carrier CC physical layer of described unauthorized frequency range is little District ID；Or, described community ID is the physical-layer cell corresponding for member carrier CC of described mandate frequency range ID。

Alternatively, described method also includes:

Described UE receives other reference signal in the OFDM symbol transmitting described first synchronous reference signal, And based on other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

Alternatively, described method also includes:

Described UE capture base station is at the second reference synchronization of the upper transmission of the member carrier CC of unauthorized frequency range Signal；Described second synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range Send on second complete orthogonal frequency division multiplex OFDM symbol that moment beginning rises；

Described UE described second synchronous reference signal based on capture, enters with the CC of described unauthorized frequency range Row initial synchronisation.

Alternatively, described method also includes:

Described UE receives other reference signal in the OFDM symbol transmitting described second synchronous reference signal, And based on other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

Below by two specific embodiments, the thought of the embodiment of the present invention is described further.

Embodiment three

As it is shown in fig. 7, the synchronous method flow chart provided for the embodiment of the present invention three, including:

The configuration of S701: base station uses the first synchronous reference signal of community ID scrambling.

The initial time from the member carrier CC taking unauthorized frequency range first of S702: base station is complete On whole orthogonal frequency division multiplex OFDM symbol, send described first synchronous reference signal of configuration.

S703:UE is based on reception on the CC authorizing frequency range for scrambling the first synchronous reference signal The community ID of sequence, described first synchronous reference signal that capture base station sends on the CC of unauthorized frequency range.

S704:UE described first synchronous reference signal based on capture, with the CC of described unauthorized frequency range Set up initial synchronisation.

Embodiment four

As shown in Figure 8, the synchronous method flow chart provided for the embodiment of the present invention four, including:

First synchronization ginseng that the configuration of S801: base station uses community ID scrambling, that carry the first instruction information Examining signal, this first instruction information is for indicating follow-up the second synchronous reference signal that there is transmission；And configure Carrying the second synchronous reference signal of the second instruction information, this second instruction information is used for indicating subsequent transmission LAA control signaling symbol lengths.

Here, the first synchronous reference signal can have the candidate sequence of multiple employing community ID scrambling, base Stand based on the first instruction information needing the first synchronous reference signal carrying, select and this first instruction information pair The candidate sequence answered is as the sequence of the first synchronous reference signal needing transmission.Second synchronous reference signal can Need not bind with community ID, it can have multiple time corresponding from the second different instruction information respectively Select sequence, base station based on need second synchronous reference signal carrying the second instruction information, select with this second Candidate sequence corresponding to instruction information is as needing the sequence of the second synchronous reference signal that sends.

The initial time from the member carrier CC taking unauthorized frequency range first of S802: base station is complete On whole orthogonal frequency division multiplex OFDM symbol, send configuration described first synchronous reference signal, from On second complete orthogonal frequency division multiplex OFDM symbol, send the described second reference synchronization letter of configuration Number.

S803: the UE in the Serving cell at place, base station based on being used for of receiving on the CC authorizing frequency range Scrambling the community ID of the sequence of the first synchronous reference signal, capture base station sends on the CC of unauthorized frequency range Described first synchronous reference signal.

First instruction information of carrying in S804: described UE described first synchronous reference signal based on capture, Receive the second synchronous reference signal, and based on the first synchronous reference signal and the second synchronous reference signal, with institute The CC stating unauthorized frequency range sets up initial synchronisation.

The base station of S805: adjacent cell, after described second synchronous reference signal being detected, determines described unauthorized The CC of frequency range is the most occupied, no longer competes this CC.

As it is shown in figure 9, base station is in the free time from certain member carrier CC listening to be positioned at unauthorized frequency range The moment t0 of state starts, and first transmits less than the placeholder (Preamble) of 1 OFDM symbol length, Until next OFDM symbol border, it is same that base station transmits first in first complete OFDM symbol Step reference signal, transmits the second synchronous reference signal in second complete OFDM symbol.Therefore, The first synchronous reference signal and the actual transmissions moment of the second synchronous reference signal in the embodiment of the present invention take Certainly in actual channel competition state, it is aperiodic.In the embodiment of the present invention, believe at the first reference synchronization After number, the LAA including the second synchronous reference signal can be transmitted and control signaling, in LAA control Downlink data is transmitted, including Physical Downlink Control Channel (the Physical Downlink strengthened after signaling Control Channel, PDCCH) and Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH), or only include PDSCH.

The first synchronous reference signal in the embodiment of the present invention and the frequency-domain structure of the second synchronous reference signal, can To use for reference existing PSS/SSS Design of Signal, i.e. only take up 6 Resource Block (Resource on mid frequency Block, RB), i.e. 1.08MHz bandwidth.Or, additionally design new reference signal or based on existing Synchronizing signal is extended so that it is occupy bigger bandwidth on frequency domain.If the first synchronous reference signal and / or the second synchronous reference signal do not take the frequency domain bandwidth of whole CC, then can be in other frequency resource Upper transmission other reference signal such as such as CRS, CSI-RS, PRS etc., UE can by following the tracks of these reference signals Tong Bu to set up time-frequency essence with base station.

Based on same inventive concept, the embodiment of the present invention additionally provides a kind of synchronization corresponding with synchronous method Device, owing to the principle of this device solution problem is similar to the synchronous method of the embodiment of the present invention, therefore this dress The enforcement put may refer to the enforcement of method, repeats no more in place of repetition.

Embodiment five

As shown in Figure 10, the synchronizer structural representation provided for the embodiment of the present invention five, including:

Configuration module 101, for configuration the first synchronous reference signal；

Sending module 102, for the initial time at the member carrier CC taking unauthorized frequency range from base station On first the complete orthogonal frequency division multiplex OFDM symbol risen, send configuration described first synchronizes ginseng Examine signal, carry out initial synchronisation for user equipment (UE) with described member carrier CC.

Alternatively, described configuration module 101 specifically for:

The sequence after cell ID ID scrambling is used for described first synchronous reference signal configuration.

Alternatively, described community ID is that corresponding for the member carrier CC physical layer of described unauthorized frequency range is little District ID；Or, described community ID is that the member carrier CC of the mandate frequency range that described base station takies is corresponding Physical-layer cell ID.

Alternatively, described sending module 102 is additionally operable to: the member carrier of the mandate frequency range taken in base station CC is upper is used for scrambling the described community of the sequence of described first synchronous reference signal to user equipment (UE) instruction Mark ID.

Alternatively, described configuration module 101 specifically for:

Based on authorizing the sequential design form of the auxiliary synchronous signals SSS sent in frequency range, and the use preset In the community ID of scrambling, configure the sequence of described first synchronous reference signal；Or, it is used for based on default The community ID of scrambling, generates the sequence of the first synchronous reference signal, the band that this first synchronous reference signal takies It is wider than in the bandwidth authorizing the auxiliary synchronous signals SSS sent in frequency range to take.

Alternatively, described configuration module 101 specifically for:

Configuration carries the first synchronous reference signal of instruction information.

Alternatively, described instruction information is for the control letter of instruction transmission after this first synchronous reference signal Breath.

Alternatively, described sending module 102 is additionally operable to:

If described first synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, then the frequency taken except described first synchronous reference signal in described first complete OFDM symbol Other reference signal is sent, for described UE to described unauthorized frequency in other frequency domain resource outside the resource of territory The member carrier CC of section carries out synchronized tracking.

Alternatively, described configuration module 101 is additionally operable to: configure the second synchronous reference signal；

Described sending module 102 is additionally operable to: at second complete orthogonal frequency from described initial time Send described second synchronous reference signal in multiplexing OFDM symbol, identify described non-award for adjacent cell The member carrier CC of power frequency range is taken by described base station.

Alternatively, configuration module 101 specifically for:

Based on authorizing the sequential design form of the master sync signal PSS sent in frequency range, configure described second The sequence of synchronous reference signal；Or, generate the sequence of the second synchronous reference signal, this second reference synchronization The band that signal takies is wider than in the bandwidth authorizing the master sync signal PSS sent in frequency range to take.

Alternatively, the sequence of described second synchronous reference signal carries instruction information.

Alternatively, described instruction information is for the control letter of instruction transmission after this second synchronous reference signal Breath.

Alternatively, described first synchronous reference signal and the second synchronous reference signal carry described unauthorized frequency The information of physical-layer cell ID corresponding for member carrier CC of section, described first synchronous reference signal and the Two synchronous reference signals carry out cell searching for adjacent cell user equipment (UE).

Alternatively, described sending module 102 is additionally operable to:

If described second synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, then the frequency taken except described second synchronous reference signal in described second complete OFDM symbol Other reference signal is sent, for described UE to described unauthorized frequency in other frequency domain resource outside the resource of territory The member carrier CC of section carries out synchronized tracking.

Embodiment six

As shown in figure 11, the synchronizer structural representation provided for the embodiment of the present invention six, including:

Trapping module 111, is used for capturing first that base station sends on the member carrier CC of unauthorized frequency range Synchronous reference signal；Described first synchronous reference signal is that described base station is from taking described unauthorized frequency range Send on first complete orthogonal frequency division multiplex OFDM symbol that the initial time of CC rises；

Synchronization module 112, for described first synchronous reference signal based on the capture of described trapping module 111, Initial synchronisation is carried out with the CC of described unauthorized frequency range.

Alternatively, described synchronization module 112 is additionally operable to:

The OFDM symbol transmitting described first synchronous reference signal receives other reference signal, and base In other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

Alternatively, described trapping module 111 is additionally operable to: capture base station is at the member carrier of unauthorized frequency range Second synchronous reference signal of the upper transmission of CC；Described second synchronous reference signal is that described base station is from accounting for Second the complete orthogonal frequency division multiplex OFDM symbol risen with the initial time of the CC of described unauthorized frequency range Send on number；

Described synchronization module 112 is additionally operable to, and based on the capture of described trapping module 111 described second synchronizes ginseng Examine signal, carry out initial synchronisation with the CC of described unauthorized frequency range.

Alternatively, described synchronization module 112 is additionally operable to:

The OFDM symbol transmitting described second synchronous reference signal receives other reference signal, and base In other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more Computer-usable storage medium containing computer usable program code (include but not limited to disk memory, CD-ROM, optical memory etc.) form of the upper computer program implemented.

The present invention is with reference to method, device (system) and computer program product according to embodiments of the present invention The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and / or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/ Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart The function specified in flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, makes Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know base This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.

Claims (32)

1. a synchronous method, it is characterised in that the method includes:

Base station configures the first synchronous reference signal；

The initial time from the member carrier CC taking unauthorized frequency range first of described base station is complete Orthogonal frequency division multiplex OFDM symbol on, send configuration described first synchronous reference signal, be used for Family equipment UE and described member carrier CC carry out initial synchronisation.

2. the method for claim 1, it is characterised in that base station configures the first synchronous reference signal, Including:

Base station is the sequence after described first synchronous reference signal configuration uses cell ID ID scrambling.

3. method as claimed in claim 2, it is characterised in that described community ID is described unauthorized frequency The physical-layer cell ID corresponding for member carrier CC of section；Or, described community ID is that described base station takies The physical-layer cell ID corresponding for member carrier CC of mandate frequency range.

4. method as claimed in claim 2, it is characterised in that described base station configuration described first synchronizes Before reference signal, also include:

Described base station indicates for adding to user equipment (UE) on the member carrier CC of the mandate frequency range taken Disturb the described cell ID ID of the sequence of described first synchronous reference signal.

5. method as claimed in claim 2, it is characterised in that described base station is described first synchronization ginseng Examine the sequence after signal configuration uses cell ID ID scrambling, including:

Described base station sequential design form based on the auxiliary synchronous signals SSS sent in mandate frequency range, and The community ID for scrambling preset, configures the sequence of described first synchronous reference signal；Or, described base Stand based on the default community ID for scrambling, generate the sequence of the first synchronous reference signal, this first synchronization The band that reference signal takies is wider than in the bandwidth authorizing the auxiliary synchronous signals SSS sent in frequency range to take.

6. the method as described in Claims 1 to 5 is arbitrary, it is characterised in that described base station configuration first is same Step reference signal, including:

The configuration of described base station carries the first synchronous reference signal of instruction information.

7. method as claimed in claim 6, it is characterised in that described instruction information is for indicating at this The control information of transmission after first synchronous reference signal.

8. the method for claim 1, it is characterised in that described method also includes:

If described first synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described first synchronous reference signal in described first complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

9. the method for claim 1, it is characterised in that described method also includes:

Described base station configures the second synchronous reference signal；

Described base station is at the complete orthogonal frequency division multiplex OFDM symbol of second from described initial time Described second synchronous reference signal of upper transmission, identifies the member carrier of described unauthorized frequency range for adjacent cell CC is taken by described base station.

10. method as claimed in claim 9, it is characterised in that described base station configures the second reference synchronization Signal, including:

Described base station is based on authorizing the sequential design form of the master sync signal PSS sent in frequency range, configuration The sequence of described second synchronous reference signal；Or, generating the sequence of the second synchronous reference signal, this is second years old The band that synchronous reference signal takies is wider than at the band authorizing the master sync signal PSS sent in frequency range to take Wide.

11. methods as claimed in claim 9, it is characterised in that the sequence of described second synchronous reference signal Row carry instruction information.

12. methods as claimed in claim 11, it is characterised in that described instruction information exists for instruction The control information of transmission after this second synchronous reference signal.

13. methods as claimed in claim 9, it is characterised in that described first synchronous reference signal and Two synchronous reference signals carry the physical-layer cell ID corresponding for member carrier CC of described unauthorized frequency range Information, described first synchronous reference signal and the second synchronous reference signal are for adjacent cell user equipment (UE) Carry out cell searching.

14. methods as claimed in claim 9, it is characterised in that described base station sends described second and synchronizes After reference signal, also include:

If described second synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, the most described base station removes described second synchronous reference signal in described second complete OFDM symbol Other reference signal is sent, for described UE to described in other frequency domain resource outside the frequency domain resource taken The member carrier CC of unauthorized frequency range carries out synchronized tracking.

15. 1 kinds of synchronous method, it is characterised in that the method includes:

The first synchronization ginseng that user equipment (UE) capture base station sends on the member carrier CC of unauthorized frequency range Examine signal；Described first synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range Send on first complete orthogonal frequency division multiplex OFDM symbol that initial time rises；

Described UE described first synchronous reference signal based on capture, enters with the CC of described unauthorized frequency range Row initial synchronisation.

16. methods as claimed in claim 15, it is characterised in that user equipment (UE) capture base station exists Described first synchronous reference signal sent on the CC of unauthorized frequency range, including:

Described UE receives for scrambling the first synchronous reference signal on the member carrier CC authorizing frequency range The cell ID ID of sequence；

Described UE based on described community ID, capture base station send on the CC of unauthorized frequency range described the One synchronous reference signal.

17. methods as claimed in claim 16, it is characterised in that described community ID is described unauthorized The physical-layer cell ID corresponding for member carrier CC of frequency range；Or, described community ID is described mandate frequently The physical-layer cell ID corresponding for member carrier CC of section.

18. methods as claimed in claim 15, it is characterised in that described method also includes:

Described UE receives other reference signal in the OFDM symbol transmitting described first synchronous reference signal, And based on other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

19. methods as claimed in claim 15, it is characterised in that described method also includes:

Described UE capture base station is at the second reference synchronization of the upper transmission of the member carrier CC of unauthorized frequency range Signal；Described second synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range Send on second complete orthogonal frequency division multiplex OFDM symbol that moment beginning rises；

Described UE described second synchronous reference signal based on capture, enters with the CC of described unauthorized frequency range Row initial synchronisation.

20. methods as claimed in claim 19, it is characterised in that described method also includes:

Described UE receives other reference signal in the OFDM symbol transmitting described second synchronous reference signal, And based on other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

21. 1 kinds of synchronizers, it is characterised in that this device includes:

Configuration module, for configuration the first synchronous reference signal；

Sending module, for the initial time of the member carrier CC taking unauthorized frequency range from base station On first complete orthogonal frequency division multiplex OFDM symbol, send the described first reference synchronization letter of configuration Number, carry out initial synchronisation for user equipment (UE) with described member carrier CC.

22. devices as claimed in claim 21, it is characterised in that described configuration module specifically for:

The sequence after cell ID ID scrambling is used for described first synchronous reference signal configuration.

23. devices as described in claim 21 or 22, it is characterised in that described configuration module is specifically used In:

Configuration carries the first synchronous reference signal of instruction information.

24. devices as claimed in claim 21, it is characterised in that described sending module is additionally operable to:

If described first synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, then the frequency taken except described first synchronous reference signal in described first complete OFDM symbol Other reference signal is sent, for described UE to described unauthorized frequency in other frequency domain resource outside the resource of territory The member carrier CC of section carries out synchronized tracking.

25. devices as claimed in claim 21, it is characterised in that described configuration module is additionally operable to: join Put the second synchronous reference signal；

Described sending module is additionally operable to: at second complete OFDM from described initial time Send described second synchronous reference signal in OFDM symbol, identify described unauthorized frequency range for adjacent cell Member carrier CC taken by described base station.

26. devices as claimed in claim 25, it is characterised in that described second synchronous reference signal Sequence carries instruction information.

27. devices as claimed in claim 25, it is characterised in that described first synchronous reference signal and Second synchronous reference signal carries the physical-layer cell ID corresponding for member carrier CC of described unauthorized frequency range Information, described first synchronous reference signal and the second synchronous reference signal are for adjacent cell user equipment (UE) Carry out cell searching.

28. devices as claimed in claim 25, it is characterised in that described sending module is additionally operable to:

If described second synchronous reference signal does not take total band of the member carrier CC of described unauthorized frequency range Width, then the frequency taken except described second synchronous reference signal in described second complete OFDM symbol Other reference signal is sent, for described UE to described unauthorized frequency in other frequency domain resource outside the resource of territory The member carrier CC of section carries out synchronized tracking.

29. 1 kinds of synchronizers, it is characterised in that this device includes:

Trapping module, for capturing the first synchronization that base station sends on the member carrier CC of unauthorized frequency range Reference signal；Described first synchronous reference signal is that described base station is from the CC taking described unauthorized frequency range First complete orthogonal frequency division multiplex OFDM symbol rising of initial time on send；

Synchronization module, for described first synchronous reference signal captured based on described trapping module, with described The CC of unauthorized frequency range carries out initial synchronisation.

30. devices as claimed in claim 29, it is characterised in that described synchronization module is additionally operable to:

The OFDM symbol transmitting described first synchronous reference signal receives other reference signal, and base In other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.

31. devices as claimed in claim 29, it is characterised in that described trapping module is additionally operable to: catch Obtain the base station the second synchronous reference signal in the upper transmission of the member carrier CC of unauthorized frequency range；Described second Synchronous reference signal is that described base station is second from the initial time of the CC taking described unauthorized frequency range Send on individual complete orthogonal frequency division multiplex OFDM symbol；

Described synchronization module is additionally operable to, described second synchronous reference signal captured based on described trapping module, Initial synchronisation is carried out with the CC of described unauthorized frequency range.

32. devices as claimed in claim 29, it is characterised in that described synchronization module is additionally operable to:

The OFDM symbol transmitting described second synchronous reference signal receives other reference signal, and base In other reference signal received, the member carrier CC of described unauthorized frequency range is carried out synchronized tracking.