CN102916925B - Method, system and device for sending and receiving synchronization information - Google Patents
Method, system and device for sending and receiving synchronization information Download PDFInfo
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Abstract
One specific embodiment of the invention provides a synchronization sequence sending method. For systems with different subcarrier widths, synchronization sequences occupying same frequency spectrum resources and being different in lengths are sent, or synchronization sequences being same in lengths and occupying different frequency resources are sent. The invention also provides a corresponding receiving method, and a system and device for executing the method. The sending method and system can indicate other information about areas except for a cell ID, and the corresponding terminal receives the synchronization sequences, so that the terminal obtains the other information about the area except for the cell ID.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of transmission, the method and system of receiving system synchronizing information, device.
Background technology
In a communications system, several different frequency range may be used.Such as in LTE system, a kind of is the frequency range being exclusively used in MBMS service transmission, be called special carrier (DC, Dedicated Carrier), use the community of DC transport service to be called MBMS dedicated cell (MBMS dedicated cells).One is the frequency range for transmitting clean culture (unicast) business in addition, is called unicast carriers (UC, UnicastCarrier), uses the community of UC transport service to be called unicast cells (unicast cell).Another is the frequency range for mixed transport clean culture and MBMS, is called mixed carrier (MC, Mixed Carrier), uses the community of MC transport service to be called mixed cell (mixed cell).
Below for LTE system, introduce its basic subframe structure and basic transformat.With reference to figure 1, in the frame structure of LTE system, a radio frames (radio frame) comprises 10 subframes (subframe), and each subframe is divided into 2 time slots (slot), and each time slot comprises several OFDM symbol (symbol).
When system adopts unicast carriers or mixed carrier (UC/MC) to transmit, there is the transformat (basic transmission scheme) that two kinds are basic, see table 1:
Table 1:
Wherein, 6 kinds of system bandwidths are had in form 1, form 2 situation: 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz and 20MHz in table 1, corresponding FFT counts and is respectively 128,256,512,1024,1536 and 2048, and it is 512 that the FFT that wherein 5MHz bandwidth is corresponding counts.
When system adopts special carrier (DC) to transmit, also there is the transformat that two kinds are basic, see table 2:
Table 2:
Wherein, form 3 in table 2 has 6 kinds of system bandwidths: 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz and 20MHz, corresponding FFT counts and is respectively 256,512,1024,1536,2048 and 2048, and it is 1024 that the FFT that wherein 5MHz bandwidth is corresponding counts.
With reference to figure 2, it is the transmission structure schematic diagram over a slot of the form 1 in above table 1,2, form 2, form 3, format 4.Wherein, left twill (45 ° of oblique lines) represents short CP; Twill left to right (135 ° of oblique lines) represents long CP; Subcarrier spacing and subcarrier width.
In prior art, only relate to the synchronizing information sending, receiving method under UC/MC and 15kHz subcarrier width, for: synchronizing sequence is mapped on the running time-frequency resource shared by synchronizing channel (SCH, Synchronization Channel), sends.Terminal is by detecting described synchronizing sequence, and union learns the information of relative synchronous.
Specifically, with reference to figure 3, for taking the frequency-domain structure schematic diagram of the system of 15kHz subcarrier width in prior art, for the communication system of the subcarrier spacing of employing 15kHz, such as, aforementioned format 1 in UC/MC situation or the synchronizing channel under form 2, frequency domain takies the center 960kHz bandwidth of system bandwidth, takies 64 subcarriers at center.
With reference to figure 4, for the structural representation of synchronizing channel in prior art in time domain (the frame structure location drawing of form 1): synchronizing channel is positioned at the 0th and the 5th subframe of a radio frames, wherein primary synchronization channel (P-SCH, Primary-SCH) last symbol of first time slot of subframe 0, subframe 5 is positioned at, in the drawings with grid representation, auxiliary synchronization channel (S-SCH, Secondary-SCH) the penultimate symbol of this time slot is positioned at, respectively to represent with left twill (45 ° of oblique lines) and twill left to right (135 ° of oblique lines).
Primary synchronization channel carries main synchronizing sequence, auxiliary synchronization channel carries secondary synchronization sequences.In prior art, main synchronizing sequence has 3, and secondary synchronization sequences has 170.In prior art, synchronizing channel can also carry community ID simultaneously, wherein primary synchronization channel carries one of them of 3 " in group ID ", distinguish with described 3 main synchronizing sequences, auxiliary synchronization channel carries 170 " ID group numbers ", distinguishes with described 170 secondary synchronization sequences.Synchronizing channel of the prior art like this can carry 510 community ID.Community ID is one of the information about community, for distinguishing different communities.According to analyzing known above-mentioned community ID after terminal receives above-mentioned synchronizing sequence.
The structure of above-mentioned synchronizing channel P-SCH of the prior art and S-SCH is only applicable to the UC/MC of 15kHz subcarrier width.Wherein P-SCH employing length is the ZC sequence of 63, and the index of basic sequence is respectively 25,29,34.
But, because above-mentioned synchronous channel structure of the prior art is only applicable to the UC/MC of 15kHz subcarrier width, can not carry more about the information in region.Here " region " refers to can the space of sequence corresponding to independent bearing synchronous channel SCH, this space can be by time, sky, frequently three-dimensional any one or more dimensions combine the space defined, comprise the concept of sector of the prior art, community, same to web area (SFN Area, Single Freq terminal n cy Network Area) frequently.The information (such as 15kHz or 7.5kHz) of the such as subcarrier width of place, region system or the area type information (being such as UC/MC region or DC region) under identical subcarrier width.Namely the method using existing synchronizing sequence to send can not other information about region beyond the ID of indicating cell, and corresponding terminal receives the method for synchronizing sequence, can not obtain other beyond the ID of community about the information in region.
Summary of the invention
In view of this, technical problem of the present invention is to provide a kind of synchronizing sequence sending method, can carry more information about region, corresponding, provides a kind of synchronizing sequence method of reseptance, makes terminal can obtain more information about region.
A specific embodiment of the present invention provides a kind of synchronizing sequence sending method, for the system of different subcarrier widths, send and take identical frequency resource but the different synchronizing sequence of length, or send the identical but synchronizing sequence that acquisition frequency resource is different of length.
Corresponding with above-mentioned synchronizing sequence sending method, the method of terminal processes synchronizing sequence is also provided, comprise: terminal obtains the relevant of the signal received or matching result, the subcarrier bandwidth of described relevant or matching result correspondence system and the corresponding synchronizing sequence sent; The size of more above-mentioned relevant or matching result, obtains maximum; The subcarrier bandwidth corresponding according to described maximum and its synchronizing sequence, obtain the synchronizing sequence that the subcarrier bandwidth of network side and this network side adopt.
Another detailed description of the invention of the present invention provides the system performing said method, and a kind of synchronizing sequence transmitting system, is characterized in that, comprise
First ray sends subsystem, for the system for different subcarrier widths, sends and takies identical frequency resource but the different synchronizing sequence of length; Or the second sequence sends subsystem, for sending the identical but synchronizing sequence that acquisition frequency resource is different of length.
Additionally provide a kind of sequential reception device, it is characterized in that, comprise with lower unit:
Sample rate processing unit: for for the signal received, use the sample rate S that two kinds different
1and S
2sample, S
2=S
1× 2, and S
1for subcarrier width is M
1time P-SCH shared by sample rate corresponding to bandwidth, S
2for subcarrier width is M
2time P-SCH shared by sample rate corresponding to bandwidth;
Search unit: for using local sequence to carry out being correlated with or mating from the Received signal strength carrying out sampling above by different sample rate, obtains relevant or matching result
i=1,2, n=1,2,3, wherein
corresponding sample rate S
1or S
2with sequence indicator u
n, described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side P-SCH;
Decision unit: for the whole relevant or matching result under more all sample rates, judge the subcarrier width information of institute region of search according to maximum, and obtain synchronizing information.
The respective embodiments described above, sending method and system can other information about region beyond the ID of indicating cell, and corresponding terminal receives the method and apparatus of synchronizing sequence, and terminal can be made to obtain other information about region beyond the ID of community.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of LTE system in prior art;
Fig. 2 is the basic transformat schematic diagram of LTE system in prior art;
Fig. 3 is the frequency domain schematic diagram of 15kHz subcarrier width system in prior art;
Fig. 4 is synchronizing channel P-SCH and S-SCH position in the frame structure in prior art;
Fig. 5 is the flow chart of synchronizing sequence sending method in embodiment one;
Fig. 6 is the frequency-domain structure figure of Fig. 6 two sub-carrier system in embodiment one;
Fig. 7 is the structural representation of synchronizing sequence transmitting system in embodiment one;
Detailed description of the invention
A specific embodiment of the present invention provides a kind of synchronizing sequence sending method, for the system of different subcarrier widths, send and take identical frequency resource but the different synchronizing sequence of length, or send the identical but synchronizing sequence that acquisition frequency resource is different of length.Corresponding with above-mentioned synchronizing sequence sending method, the method for terminal processes synchronizing sequence, comprising: terminal obtains the relevant of the signal received or matching result, the subcarrier bandwidth of described relevant or matching result correspondence system and the corresponding synchronizing sequence sent; The size of more above-mentioned relevant or matching result, obtains maximum; The subcarrier bandwidth corresponding according to described maximum and its synchronizing sequence, obtain the synchronizing sequence that the subcarrier bandwidth of network side and this network side adopt.
Detailed description of the invention one
In present embodiment, provide a kind of method of sending and receiving of synchronizing sequence, the subcarrier width of different system can be indicated.
The network side of communication system, such as one or more different base station, with reference to figure 5, perform the following step:
S11, be M for subcarrier width
1system, generating n1 length is L1, and basic sequence index is respectively u
11, u
12..., u
1n1zC sequence, n1 is natural number, and n1≤3, and a described n1 sequence has high auto-correlation and low cross correlation, and u
12=L1-u
11, basic sequence index u
11, u
12..., u
1n1near L1/2;
Be M for subcarrier width
2, M
2=M
1the system of × 2, generating n2 length is L2,
the index of basic sequence is respectively u
21, u
22..., u
2n2zC sequence, n2 is natural number, and n2≤3, and a described n2 sequence has high auto-correlation and low cross correlation, and u
22=L2-u
21, basic sequence index u
21, u
22..., u
2n2near L2/2;
And have low cross correlation between the ZC sequence of mentioned length L1, L2;
Specifically, the process of described formation sequence comprises and calculating, or obtains from the sequence stored.
S12, be the system of M1 for subcarrier width, be L1 by said n 1 length, basic sequence index is respectively u
11, u
12..., u
1n1zC sequence mapping on the running time-frequency resource shared by primary synchronization channel P-SCH, send described synchronizing sequence;
Be M for subcarrier width
2, M
2=M
1the system of × 2, be L2 by said n 2 length, the index of basic sequence is respectively u
21, u
22..., u
2n2zC sequence mapping on the running time-frequency resource shared by P-SCH, send described synchronizing sequence.
Like this, to the sequence that transmitting terminal has as above n1+n2 kind to send.To end side, adopt following step:
S21, use local sequence and the signal received carry out relevant or mate, obtain n1+n2 relevant or matching result
1≤n
j≤ n
i, i=1,2, n
i≤ 3, described relevant or matching result
the subcarrier bandwidth of corresponding system is M
i, the index of synchronizing sequence that sends of corresponding network side is
described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side primary synchronization channel P-SCH, be an aforementioned n1+n2 sequence;
S22, compare these sizes that is relevant or matching result, get maximum;
S23, according to described maximum, judge the synchronizing sequence that the subcarrier bandwidth of the system at transmitting terminal place and this system adopt.
Lift concrete example below to illustrate, in this example, comprise the system of two sub-carrier width: 15kHz subcarrier width and 7.5kHz subcarrier width, the concrete grammar in this example is:
At network side:
S31, system to 15kHz subcarrier width, it is the ZC sequence of 63 by length, basic sequence index can be 25 or 29 or 34, in this length be 63 sequence before fill 1 plural number 0, forming physical length is the sequence of 64, is mapped on 64 subcarriers of this 15kHz subcarrier width system centre bandwidth;
S32, system to 7.5kHz subcarrier width, it is the ZC sequence of 127 by length, basic sequence index is respectively 61 or 65 or 66, in this length be 127 sequence before fill 1 plural number 0, forming physical length is the sequence of 128, is mapped on 128 subcarriers of this 7.5kHz subcarrier width system centre bandwidth.
These three length are 127, and basic sequence index is respectively 61, and the ZC sequence of 65,66, meets u
1=n1, u
2=127-n1, u
3=n2, namely wherein two basic sequence indexs form complementary relationship to sequence length 127, and three basic sequence indexs are all near the half 64 of 127; These three length be 127 ZC sequence there is more satisfactory auto-correlation and cross correlation; And meet with length be 63, index be 25,29,34 three low cross-correlation of basic sequence.
Structural reference Fig. 6 of the frequency domain of the method formation of above-mentioned mapping.
In end side:
Local matching sequence used is also above-mentioned 6 sequences, namely length to be 63 basic sequence indexs be 25 and 29 and 34 ZC sequence and length be the ZC sequence that 127 basic sequence indexs are respectively 61 and 65 and 66.
Above-mentioned 6 sequences of S41, end side are carried out relevant to the signal received or mate, and obtaining relevant or matching result is A, B, C, D, E, F.The corresponding subcarrier of described A to be the system of 15kHz and index be 25 ZC sequence, the corresponding subcarrier of B to be the system of 15kHz and index be 29 ZC sequence, the corresponding subcarrier of C to be the system of 15kHz and index be 34 ZC sequence, the corresponding subcarrier of D to be the system of 7.5kHz and index be 61 ZC sequence, the corresponding subcarrier of E to be the system of 7.5kHz and index be 65 ZC sequence, the corresponding subcarrier of F to be the system of 7.5kHz and index the be ZC sequence of 66 is respectively.
S42, compare the size of A to F, get maximum,
S43, the subcarrier width of system judging the transmitting terminal that this end side is corresponding according to this maximum and the synchronizing sequence of employing.The sequence that subcarrier width corresponding to this maximum, this maximum are corresponding, is the synchronizing sequence that the subcarrier bandwidth of network side and this network side send.
Such as, suppose to be A to the maximum, then can decision network side send be under 15kHz subcarrier length be 63, index be 25 ZC sequence; If be E to the maximum, then can decision network side send be under 7.5kHz subcarrier length be 63, index be 65 ZC sequence.
In this detailed description of the invention, its beneficial effect is embodied in:
The ZC sequence being 127 due to above-mentioned three length has more satisfactory auto-correlation and cross correlation, and they and length be 63 ZC sequence have lower cross correlation, make terminal can by search for respectively P-SCH 6 ZC sequences (lower three length of 15kHz be 63 ZC sequence and lower three length of 7.5kHz be 127 ZC sequence), while acquisition synchronizing information (length, index etc. of synchronizing sequence), subcarrier width information can also be obtained.Can find out, length is the sequence of 127 simultaneously, make sequence length under P-SCH and the 15kHz subcarrier width under 7.5kHz subcarrier width be 63 P-SCH occupy identical frequency bandwidth, make their net synchronization capability close.
In other detailed description of the invention, when multiple adjacent DC MBMS region is asynchronous, 3 P-SCH sequences can not be needed, now only use one or two in above-mentioned sequence.
This detailed description of the invention also provides a kind of sequence transmitting system, and with reference to figure 7, namely First ray sends subsystem, and this system specifically comprises: First ray generation unit: for being M for subcarrier width
1system, generating n1 length is L1, and basic sequence index is respectively u
11, u
12..., u
1n1zC sequence, n1 is natural number, and n1≤3, and a described n1 sequence has high auto-correlation and low cross correlation, and u
12=L1-u
11, basic sequence index u
11, u
12..., u
1n1near L1/2;
First ray processing unit: for being M for subcarrier width
1system, be L1 by said n 1 length, basic sequence index be respectively u
11, u
12.., u
1n1zC sequence mapping on the running time-frequency resource shared by primary synchronization channel P-SCH, send described synchronizing sequence;
Second sequence generating unit: for being M for subcarrier width
2, M
2the system of=M1 × 2, generating n2 length is L2,
the index of basic sequence is respectively u
21, u
22..., u
2n2zC sequence, n2 is natural number, and n2≤3, and a described n2 sequence has high auto-correlation and low cross correlation, and u
22=L2-u
21, basic sequence index u
21, u
22.., u
2n2near L2/2; And have low cross correlation between the ZC sequence of mentioned length L1, L2;
Second series processing unit: for being M for subcarrier width
2, M
2said n 2 length are L2 by the system of=M1 × 2,
the index of basic sequence is respectively u
21, u
22.., u
2n2zC sequence mapping on the running time-frequency resource shared by P-SCH, send described synchronizing sequence.
In the communication system of reality, above-mentioned First ray generation unit and First ray processing unit are in same base station, and the second sequence generating unit and the second series processing unit are in same base station.It can be a base station that above-mentioned First ray sends subsystem, or multiple base station.When to send subsystem be a base station to First ray, above-mentioned First ray generation unit and First ray processing unit and the second sequence generating unit and the second series processing unit are in same base station.
Concrete, for the DC region of 7.5kHz subcarrier width, the dispensing device of its P-SCH on a base station comprises:
Sequence generating unit: generate the ZC sequence that length is 127, basic sequence index is one of them of 61,65 or 66;
Series processing unit: in this length be 127 sequence before fill 1 plural number 0, forming physical length is the sequence of 128, in the time resource corresponding to P-SCH, above-mentioned sequence mapping on 128 subcarriers of this 7.5kHz subcarrier width system centre bandwidth, then carry out the process of running time-frequency resource.
Detailed description of the invention two
In this detailed description of the invention, a kind of sending method and method of reseptance of synchronizing sequence are provided, can the subcarrier width information of indication mechanism, such as 7.5kHz subcarrier width or 15kHz subcarrier width, when certain area type of system correspondence of certain subcarrier width, also can the information of indicating area type, such as, when the region of 7.5kHz subcarrier width must be DC region, can be DC region or UC/MC region by present embodiment instruction.
At network side:
S51, generation n sequence length are L, basic sequence index is respectively u
1, u
2.., u
nzC sequence, n is natural number, n≤3, and a described n sequence has high auto-correlation and low cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2.., u
nnear L/2;
S52, for M
1the system of subcarrier width, by above-mentioned ZC sequence, is mapped on running time-frequency resource that M1 subcarrier width system P-SCH takies, sends;
For M
2, M
2=M
1the system of × 2 subcarrier widths, by above-mentioned ZC sequence mapping to M
2on the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
In end side:
S61, terminal, for the signal received, use the sample rate S that two kinds different
1and S
2sample, S
2=S
1× 2, and S
1for subcarrier width is M
1time P-SCH shared by sample rate corresponding to bandwidth, S
2for subcarrier width is M
2time P-SCH shared by sample rate corresponding to bandwidth;
S62, use local sequence and the above-mentioned Received signal strength through different sample rate to carry out being correlated with or mating, obtain the relevant or matching result in n × 2
i=1,2, n=1,2,3, wherein
corresponding sample rate S
iwith the sequence indicator u that network side sends
n, described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side P-SCH;
S63, compare the relevant or matching result in said n × 2
obtain maximum;
S64, judge the subcarrier width of the network side in this region and the synchronizing sequence of network side according to this maximum.The sequence that subcarrier width corresponding to sample rate corresponding to this maximum, this maximum are corresponding, is the synchronizing sequence that the subcarrier bandwidth of network side and this network side adopt.
Below to comprise the DC region of 7.5kHz subcarrier width in system, the situation in the UC/MC region of 15kHz subcarrier width is example, is specifically described.
At network side:
Length is 63 by S71, UC/MC region for 15kHz subcarrier, basic sequence index is respectively 25,29, the ZC sequence of 34, on the running time-frequency resource that the P-SCH being mapped to 15kHz subcarrier width system takies, sends;
S72, DC region for 7.5kHz subcarrier width, by with P-SCH under aforementioned 15kHz subcarrier adopt the identical sequence of ZC sequence (namely sequence length be 63, basic sequence index is respectively 25,29, the ZC sequence of 34), be mapped on running time-frequency resource that 7.5kHz subcarrier width system P-SCH takies, send;
In the present embodiment, length is the sequence frequency bandwidth that the P-SCH under 7.5kHz subcarrier width is occupied of 63, for the half of the frequency bandwidth under original 15kHz subcarrier occupied by P-SCH, thus decrease P-SCH taking 7.5kHz subcarrier width system resource; Because the system of 7.5kHz subcarrier width and the system of 15kHz subcarrier width adopt same P-SCH sequence, thus enhance the compatibility of communication system.
In end side:
The step of the execution of above-mentioned terminal specifically comprises:
S81, the end-on collection of letters number are undertaken being correlated with or mating by three local sequences with after sample rate 0.96MHz sampling.Local sequence and sequence length are 63, basic sequence index is respectively 25,29, the ZC sequence of 34.Relevant or the matching result obtained, for A, B, C, respectively corresponding index be 25,29,34, length be 63 the relevant or matching result that obtains to the signal received under sample rate 0.96MHz of the local sequence of ZC, 0.96MHz is the subcarrier width sample rate that bandwidth is corresponding shared by P-SCH during 15kHz.
S82, to received signal with sample rate 0.48MHz sampling after undertaken being correlated with or mating by these three local sequences.Obtaining relevant or matching result is such as D, E, F, respectively corresponding index be 25,29,34, length be 63 the relevant or matching result that obtains to the signal received under sample rate 0.48MHz of the local sequence of ZC, 0.48MHz is the subcarrier width sample rate that bandwidth is corresponding shared by P-SCH during 7.5kHz.
S83, compare the size of A to F, obtain maximum,
S84, obtain the subcarrier width of network side and the index of sequence according to this maximum.This maximum
The sequence that subcarrier width corresponding to corresponding sample rate, this maximum are corresponding, is the synchronizing sequence that the subcarrier bandwidth of network side and this network side adopt.
Suppose to be A to the maximum, then can judge that transmitting terminal sends be under 15kHz subcarrier length as 63, index as 25 ZC sequence; If be E to the maximum, then can judge that transmitting terminal sends be under 7.5kHz subcarrier length as 63, index as 29 ZC sequence, the rest may be inferred.
In the present embodiment, the ZC sequence being 63 due to length has more satisfactory auto-correlation and cross correlation; And cross correlation between the sequence that formed of former 63 long sequences and this 63 long sequence half is lower, can ensure to select correct result by above-mentioned search.
In this embodiment, also provide a kind of system performing above-mentioned sequential transmission method, i.e. the second sequence transmitting system, specifically comprise:
3rd sequence generating unit: n sequence length is L for generating, basic sequence index is respectively u
1, u
2..., u
nzC sequence, n is natural number, n≤3, and a described n sequence has high auto-correlation and low cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2.., u
nnear L/2;
3rd series processing unit: for for M
1the system of subcarrier width, by above-mentioned ZC sequence mapping to M
1on the running time-frequency resource that subcarrier width system P-SCH takies, send;
4th series processing unit: for for M
2, M
2=M
1the system of × 2 subcarrier widths, by above-mentioned ZC sequence mapping to M
2on the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
In the communication system of reality, above-mentioned 3rd sequence generating unit and the 3rd series processing unit are in same base station, and the 3rd sequence generating unit and the 4th series processing unit are in same base station.It can be a base station that above-mentioned second sequence sends subsystem, or multiple base station.When to send subsystem be a base station to the second sequence, above-mentioned 3rd sequence generating unit and the 3rd series processing unit and the 4th series processing unit are in same base station.
As can be seen from scheme above, when the second sequence transmission subsystem is a base station, only needs the 3rd sequence generating unit in system, namely reused the 3rd sequence generating unit, thus enhanced the compatibility of system, reduced the complexity of equipment.
Concrete, for the DC region of 15kHz or 7.5kHz subcarrier width, the dispensing device of its P-SCH comprises:
Sequence generating unit: generate that length is 63, basic sequence index is 25,29 or 34 one of them ZC sequences;
Series processing unit: in this length be 63 sequence before fill 1 plural number 0, forming physical length is the sequence of 64, in the time resource corresponding to P-SCH, above-mentioned sequence mapping on 64 subcarriers of this 15kHz or 7.5kHz subcarrier width system centre bandwidth, then carry out the process of running time-frequency resource.
This detailed description of the invention additionally provides a kind of synchronizing information receiving system and comprises:
Sample rate processing unit: for for the signal received, use the sample rate S that two kinds different
1and S
2sample, S
2=S
1× 2, and S
1for subcarrier width is M
1time P-SCH shared by sample rate corresponding to bandwidth, S
2for subcarrier width is M
2time P-SCH shared by sample rate corresponding to bandwidth;
Search unit: for using local sequence to carry out being correlated with or mating from the Received signal strength carrying out sampling above by different sample rate, obtains relevant or matching result
i=1,2, n=1,2,3, wherein
corresponding sample rate S
1or S
2with sequence indicator u
n, described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side P-SCH;
Decision unit: for the whole relevant or matching result under more all sample rates, judge the subcarrier width information of institute region of search according to maximum, and obtain synchronizing information.
Above-mentioned synchronizing information receiving system is in terminal.
For the subcarrier width system of 7.5kHz and 15kHz, the receiving system of P-SCH comprises:
Sample rate processing unit: control to adopt different sample rates to received signal, such as 0.96MHz and 0.48MHz samples, wherein 0.96MHz corresponds to the subcarrier width sample rate that bandwidth is corresponding shared by P-SCH during 15kHz, and 0.48MHz corresponds to the subcarrier width sample rate that bandwidth is corresponding shared by P-SCH during 7.5kHz;
ZC this locality sequence that search unit: the Received signal strength adopting different sample rate such as 0.96MHz and 0.48MHz process is 63 to the length that this locality stores respectively, basic sequence index is 25,29,34 is carried out relevant or mates, and records result.
Decision unit: the whole relevant or match search result under more all sample rates, judges the subcarrier width information of institute region of search, and obtain synchronizing information according to maximum.
As can be seen from said apparatus, although terminal will do 6 search, but can reuse identical search unit for the Received signal strength under 0.96MHz and 0.48MHz sampling processing, hardware resource can save half compared with detailed description of the invention one, reduce the equipment complexity of terminal.
And; under this 7.5kHz subcarrier, P-SCH design has continued to use the sequence that P-SCH 63 is long under original 15kHz subcarrier; the dual-mode base station being conducive to UC/MC and DC reuse the P-SCH signal generating apparatus of network side and terminal reuse 15kHz subcarrier under synchronous searcher; reduce the complexity of base station transmitting terminal and expected end receiver equipment, and shared bandwidth resources save half.
Detailed description of the invention three:
In this detailed description of the invention, providing a kind of method of sending and receiving of synchronizing sequence, can indicate the zones of different type under same sub-carrier width, such as, is DC region or UC/MC region.
At network side:
S91, same sub-carrier width but dissimilar region, be mapped to identical synchronizing sequence on the running time-frequency resource shared by primary synchronization channel P-SCH, send;
S92, described dissimilar region adopt different auxiliary synchronization channels.
Such as, described auxiliary synchronization channel is different, comprises one or its any combination of situation below: adopt different auxiliary synchronous SSC sequences, or use different auxiliary synchronous scramblers, or auxiliary synchronization channel S-SCH takies different running time-frequency resources.
In end side:
S101, terminal, by detecting auxiliary synchronization channel, carry out the type of distinguishable region according to the auxiliary synchronization channel detected.
Be described for the system comprising DC region and UC/MC two kinds of area types of 15kHz subcarrier width below:
Network side: the primary synchronization channel P-SCH in S111, DC region reuses the primary synchronization channel P-SCH sequence in UC/MC region, such as employing length is the ZC sequence of 63, and the index of basic sequence is respectively 25,1 or multiple sequence of 29,34;
S112, DC region and UC/MC adopt different auxiliary synchronization channel S-SCH, and wherein different auxiliary synchronization channel S-SCH comprises one or its any combination of following situations: use different SSC sequences, use different scramblers, take different running time-frequency resources etc.
End side: S121, terminal by detecting auxiliary synchronization channel S-SCH, can distinguish UC/MC region and DC region according to the auxiliary synchronization channel S-SCH detected.
By said method, for the region of same sub-carrier width, can by the type information of the transmission indicating area of synchronizing sequence, such as, be UC/MC region or DC region; Terminal can know the type information of above-mentioned zone by receiving synchronizing sequence.
In addition, the scheme that present embodiment three provides can be combined with previous embodiment one, i.e. network side, such as one or more base station, performs the step in present embodiment and embodiment one simultaneously; Terminal performs the step in present embodiment and embodiment one simultaneously.This preferably embodiment, one side can indicate subcarrier width information by primary synchronization channel P-SCH, on the other hand can by the type information of zones of different under auxiliary synchronization channel S-SCH instruction same sub-carrier width.
In addition, the scheme that the present embodiment provides can be combined with previous embodiment two, i.e. network side, such as one or more base station, performs the step of present embodiment and embodiment two simultaneously; Terminal performs the step in present embodiment and embodiment two simultaneously.This preferably embodiment, on the one hand can the subcarrier width information of indicating area, primary synchronization channel P-SCH taking 7.5kHz subcarrier width system resource can also be reduced, enhance the compatibility of communication system, on the other hand can by the type information of zones of different under auxiliary synchronization channel S-SCH instruction same sub-carrier width.
Detailed description of the invention four:
In this detailed description of the invention, provide a kind of method of sending and receiving of synchronizing sequence, for same sub-carrier width but dissimilar region, can the type of indicating area, such as DC region or UC/MC region.
Be described for the system comprising DC region and UC/MC two kinds of area types of 15kHz subcarrier width below:
Network side:
The primary synchronization channel P-SCH in S131, DC region adopts one or more primary synchronization channel P-SCH sequence different from MC/UC region;
End side: S141, terminal can distinguish the DC of UC/MC and the 15kHz subcarrier width of 15kHz subcarrier width by different primary synchronization channel P-SCH channels.
A concrete embodiment UC/MC region adopts the sequence of 63 length, and the primary synchronization channel P-SCH in DC region adopts the ZC sequence of other length, and such as length is the ZC sequence of 61.
More specifically in an embodiment, if DC region only needs 1 primary synchronization channel P-SCH sequence, for the primary synchronization channel P-SCH of the system at this place, DC region, can use length be 63 ZC sequence, the index of basic sequence is 38.
In the present embodiment, because 38 and 25 pairs of length 63 form complementation, so be 38 for index, sequence can reuse generation unit, the search unit that index is the sequence of 25, thus be conducive to base station like this and reuse the searcher that the primary synchronization channel P-SCH signal generating apparatus of network side and terminal reuse end side, reduce the complexity of base station transmitting terminal and terminal side apparatus.
In addition, the scheme that the present embodiment provides can be combined with detailed description of the invention one or detailed description of the invention two, namely performs the step in present embodiment and detailed description of the invention one or detailed description of the invention two simultaneously.This preferably embodiment, on the one hand can indicate subcarrier width information, on the other hand can the type information of indicating area.
Detailed description of the invention five
In this detailed description of the invention, provide the method for a kind of indicating area type information, can the type of indicating area, such as DC region or UC/MC region.
At network side: for dissimilar region, adopt identical synchronous channel SCH and different broadcast channel (BCH, Broadcast Channel).Identical synchronous channel SCH is adopted to comprise identical primary synchronization channel P-SCH and auxiliary synchronization channel S-SCH.
Be described for the system comprising DC region and UC/MC two kinds of area types of 15kHz subcarrier width below:
At network side:
The DC Regional Gravity primary synchronization channel P-SCH sequence in MC/UC region.Reuse and namely refer to that the primary synchronization channel P-SCH in DC region adopts the sequence identical with the primary synchronization channel P-SCH sequence in MC/UC region.Such as, if the primary synchronization channel P-SCH sequence employing length in MC/UC region is the ZC sequence of 63, the index of basic sequence is respectively 25,1 or multiple sequence of 29,34, and so the primary synchronization channel P-SCH in DC region also adopts above-mentioned sequence;
And DC region adopts identical auxiliary synchronization channel S-SCH with containing MC/UC region;
And DC region and MC/UC region adopt different broadcast channel BCH; Wherein, different BCH channels is the one of following situations or its any combination: the different information contents, use different coded modulation schemes, take different running time-frequency resources, use different scramblers etc.
In end side: terminal can distinguish the UC/MC region of 15kHz subcarrier width and the DC region of 15kHz subcarrier width by different BCH channels.
By said method, can by the type information of different broadcast channel BCH indicating areas, such as, be UC/MC region or DC region; Terminal can know the type information of above-mentioned zone by different broadcast channel BCH.
In addition, the scheme that the present embodiment provides can be combined with detailed description of the invention one or detailed description of the invention two, namely perform the step of step in this real-time mode and concrete real-time mode one or detailed description of the invention two simultaneously, on the one hand can indicate subcarrier width information, on the other hand can the type information of indicating area.
Claims (14)
1. a synchronizing sequence sending method, is characterized in that,
For the system of different subcarrier widths, send the identical but synchronizing sequence that acquisition frequency resource is different of length;
The described system for different subcarrier widths, sends the identical but step that the is synchronizing sequence that acquisition frequency resource is different of length and comprises:
Generate that n sequence length is L, basic sequence index is respectively u
1, u
2..., u
nzC sequence, n is natural number, n≤3, and a described n sequence has high auto-correlation and low cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2..., u
nnear L/2;
For M
1the system of subcarrier width, by above-mentioned ZC sequence, is mapped to M
1on the running time-frequency resource that subcarrier width system P-SCH takies, send;
For M
2, M
2=M
1the system of × 2 subcarrier widths, by above-mentioned ZC sequence mapping to M
2on the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
2. the method for transmission synchronizing sequence according to claim 1, is characterized in that,
A described n sequence length is L, basic sequence index is respectively u
1, u
2..., u
nzC sequence be specially that 3 sequence lengths are 63, basic sequence index is respectively 25,29, the ZC sequence of 34;
Described M
1subcarrier width is specially 7.5kHz,
Described M
2, M
2=M
1× 2 subcarrier widths are specially 15kHz.
3. the method for transmission synchronizing sequence according to claim 1 and 2, it is characterized in that, the method also comprises:
For same sub-carrier width but dissimilar region, identical main synchronizing sequence is mapped on the running time-frequency resource shared by primary synchronization channel P-SCH, sends;
Described dissimilar region adopts different auxiliary synchronization channels.
4. method according to claim 3, it is characterized in that, described same sub-carrier width but dissimilar region are specially: the special carrier DC region of 15kHz subcarrier width, the unicast carriers of 15kHz subcarrier width or mixed carrier UC/MC region;
Described identical main synchronizing sequence is specially the ZC sequence that length is 63, and the index of basic sequence is respectively 25,1 or multiple sequence of 29,34.
5. method according to claim 3, it is characterized in that, described different auxiliary synchronization channel comprises one or its any combination of situation below: adopt different secondary synchronization sequences, or use different auxiliary synchronous scramblers, or auxiliary synchronization channel S-SCH takies different running time-frequency resources.
6. the method for transmission synchronizing sequence according to claim 1 and 2, it is characterized in that, the method also comprises:
For same sub-carrier width but dissimilar region, different main synchronizing sequences is mapped on the running time-frequency resource shared by primary synchronization channel P-SCH, sends.
7. method according to claim 6, is characterized in that, described same sub-carrier width but dissimilar region are specially: the DC region of 15kHz subcarrier width, the UC/MC region of 15kHz subcarrier width; Described different sequence is specially: the index of to be length be the UC/MC region for the 15kHz subcarrier width basic sequence of 63 is respectively 25,29, the ZC sequence of 34; DC region for 15kHz subcarrier width is other sequence.
8. method according to claim 7, is characterized in that, for the DC region of 15kHz subcarrier width, other sequence described is specially 1 ZC sequence that length is the index 38 of the basic sequence of 63.
9. the method for transmission synchronizing sequence according to claim 1 and 2, it is characterized in that, the method also comprises:
DC region and MC/UC region adopt identical synchronous channel SCH and different broadcast channel BCH.
10. the method for transmission synchronizing sequence according to claim 9, it is characterized in that, described different BCH channel comprises the one of following situations or its any combination: the different information contents, use different coded modulation schemes, take different running time-frequency resources, use different scramblers.
11. 1 kinds of synchronizing sequence method of reseptances, is characterized in that,
Terminal obtains the relevant of the signal received or matching result, the synchronizing sequence that the subcarrier bandwidth of described relevant or matching result correspondence system and map network side send;
The size of more above-mentioned relevant or matching result, obtains maximum;
The subcarrier bandwidth corresponding according to described maximum and its synchronizing sequence, obtain the synchronizing sequence that the subcarrier bandwidth of system and this network side send;
The step that is relevant or matching result that described terminal obtains the signal received specifically comprises:
Terminal, for the signal received, uses the sample rate S that two kinds different
1and S
2sample, S
2=S
1× 2, and S
1for subcarrier width is M
1time P-SCH shared by sample rate corresponding to bandwidth, S
2for subcarrier width is M
2time P-SCH shared by sample rate corresponding to bandwidth;
Use local sequence and the above-mentioned Received signal strength through different sample rate to carry out being correlated with or mating, obtain relevant or matching result Y
siUn, i=1,2, n=1,2,3, wherein Y
siUncorresponding sample rate S
iwith the sequence indicator u that network side sends
n, described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side P-SCH.
12. synchronizing sequence method of reseptances according to claim 11, is characterized in that,
Described sample rate S
1and S
2be respectively 0.48MHz, 0.96MHz, described M
1be specially 7.5kHz subcarrier width, described M
2be specially 15kHz subcarrier width.
13. 1 kinds of synchronizing sequence transmitting systems, is characterized in that, comprise
Second sequence sends subsystem, for sending the identical but synchronizing sequence that acquisition frequency resource is different of length;
Described second sequence sends subsystem, specifically comprises:
3rd sequence generating unit: n sequence length is L for generating, basic sequence index is respectively u
1, u
2..., u
nzC sequence, n is natural number, n≤3, and a described n sequence has high auto-correlation and low cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2..., u
nnear L/2;
3rd series processing unit: for for M
1the system of subcarrier width, by above-mentioned ZC sequence mapping to M
1on the running time-frequency resource that subcarrier width system P-SCH takies, send;
4th series processing unit: for for M
2, M
2=M
1the system of × 2 subcarrier widths, by above-mentioned ZC sequence mapping to M
2on the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
14. 1 kinds of sequential reception devices, is characterized in that, comprise with lower unit:
Sample rate processing unit: for for the signal received, use the sample rate S that two kinds different
1and S
2sample, S
2=S
1× 2, and S
1for subcarrier width is M
1time P-SCH shared by sample rate corresponding to bandwidth, S
2for subcarrier width is M
2time P-SCH shared by sample rate corresponding to bandwidth;
Search unit: for using local sequence to carry out being correlated with or mating from the Received signal strength carrying out sampling above by different sample rate, obtains relevant or matching result Y
siUn, i=1,2, n=1,2,3, wherein Y
siUncorresponding sample rate S
1or S
2with sequence indicator u
n, described local sequence be generate in end side this locality or store, to send the sequence that sequence pair answers with known network side P-SCH;
Decision unit: for the whole relevant or matching result under more all sample rates, judge the subcarrier width information of institute region of search according to maximum, and obtain synchronizing information.
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