CN102916925A - 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, relate in particular to a kind of transmission, the method and system of receiving system synchronizing information, device.
Background technology
In communication system, may use several different frequency ranges.For example in the LTE system, a kind of is the frequency range that is exclusively used in the professional transmission of MBMS, is called special carrier (DC, Dedicated Carrier), uses the residential quarter of DC transport service to be called MBMS dedicated cell (MBMS dedicated cells).Also having a kind of is for the professional frequency range of transmission clean culture (unicast), is called unicast carriers (UC, UnicastCarrier), uses the residential quarter of UC transport service to be called clean culture residential quarter (unicast cell).Another is the frequency range for mixed transport clean culture and MBMS business, is called mixed carrier (MC, Mixed Carrier), uses the residential quarter of MC transport service to be called mixed cell (mixed cell).
The below introduces its basic subframe structure and basic transformat take the LTE system as example.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 symbols (symbol).
Adopt in the situation that unicast carriers or mixed carrier (UC/MC) transmit in system, two kinds of basic transformats (basic transmission scheme) are arranged, referring to table 1:
Table 1:
| ? | Subcarrier width | FFT counts | Symbol lengths | CP length | Every time slot |
| Form | |||||
| 1 | 15kHz | 512/5MHz | Normal length+CP length | Short CP | 7 |
| |
15kHz | 512/5MHz | Normal length+CP length | |
6 |
Wherein, in form 1, form 2 situations 6 kinds of system bandwidth: 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz and 20MHz are arranged in the table 1, corresponding FFT counts and is respectively 128,256,512,1024,1536 and 2048, and wherein to count be 512 to FFT corresponding to 5MHz bandwidth.
Adopt in the situation that special carrier (DC) transmits in system, two kinds of basic transformats are also arranged, referring to table 2:
Table 2:
| ? | Subcarrier width | FFT counts | Symbol lengths | CP length | Every time slot |
| Form | |||||
| 3 | 7.5kHz | 1024/5MHz | Normal length * 2+CP length | Long CP*2 | 3 |
| |
15kHz | 512/5MHz | Normal length+CP length | |
6 |
Wherein, form 3 in the table 2 has 6 kinds of system bandwidth: 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz and 20MHz, corresponding FFT counts and is respectively 256,512,1024,1536,2048 and 2048, and wherein to count be 1024 to FFT corresponding to 5MHz bandwidth.
With reference to figure 2, be the transmission structure schematic diagram on a time slot of the form 1 in the above table 1,2, form 2, form 3, format 4.Wherein, the short CP of left twill (45 ° of oblique lines) expression; The long CP of twill left to right (135 ° of oblique lines) expression; Subcarrier spacing is subcarrier width.
In the prior art, only relate to UC/MC and be the synchronizing information sending, receiving method under the 15kHz subcarrier width, for: synchronizing sequence is mapped on the shared running time-frequency resource of synchronizing channel (SCH, Synchronization Channel), sends.Terminal is by detecting described synchronizing sequence, and union is learnt the information of relative synchronous.
Particularly, with reference to figure 3, frequency-domain structure schematic diagram for the system that takies the 15kHz subcarrier width in the prior art, communication system for the subcarrier spacing that adopts 15kHz, the for example aforementioned form 1 in the UC/MC situation or the synchronizing channel under the form 2, take the center 960kHz bandwidth of system bandwidth at frequency domain, take 64 subcarriers at center.
With reference to figure 4, be the structural representation (the frame structure location drawing of form 1) of synchronizing channel in the prior art on time domain: synchronizing channel is positioned at the 0th and the 5th subframe of a radio frames, primary synchronization channel (P-SCH wherein, Primary-SCH) be positioned at last symbol of first time slot of subframe 0, subframe 5, in the drawings with grid representation, auxiliary synchronization channel (S-SCH, Secondary-SCH) be positioned at the penult symbol of this time slot, respectively with left twill (45 ° of oblique lines) and twill left to right (135 ° of oblique lines) expression.
Carry main synchronizing sequence on the primary synchronization channel, carried secondary synchronization sequences on the auxiliary synchronization channel.Main synchronizing sequence has 3 in the prior art, and secondary synchronization sequences has 170.Synchronizing channel can also be carried residential quarter ID simultaneously in the prior art, wherein primary synchronization channel carries one of them of 3 " ID in the group ", distinguish with described 3 main synchronizing sequences, 170 " ID group number " of auxiliary synchronization channel carrying distinguished with described 170 secondary synchronization sequences.Synchronizing channel of the prior art like this can be carried 510 residential quarter ID.Residential quarter ID is one of information about the residential quarter, is used for distinguishing different residential quarters.Terminal receives behind the above-mentioned synchronizing sequence according to analyzing as can be known above-mentioned residential quarter ID.
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 63 ZC sequence, and the index of basic sequence is respectively 25,29,34.
Yet, 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 information about the zone.Here " zone " refers to the space of can the independent bearing synchronous channel SCH corresponding sequence, this space can be by the time, sky, the space of three-dimensional any one or more dimensions combination definition frequently, comprise sector of the prior art, residential quarter, the same frequently concept of web area (SFN Area, Single Freq terminal n cy Network Area).The for example information (for example 15kHz or 7.5kHz) of the subcarrier width of regional place system or the area type information under identical subcarrier width (for example being UC/MC zone or DC zone).Namely use method that existing synchronizing sequence sends other information about the zone beyond can not indicating cell ID, terminal correspondingly receives the method for synchronizing sequence, can not obtain other information about the zone beyond the ID of residential quarter.
Summary of the invention
In view of this, technical problem of the present invention provides a kind of synchronizing sequence sending method, can carry more information about the zone, correspondingly, provides a kind of synchronizing sequence method of reseptance, so that terminal can be obtained more information about the zone.
A specific embodiment of the present invention provides a kind of synchronizing sequence sending method, system for different subcarrier widths, transmission takies identical frequency resource but the different synchronizing sequence of length, perhaps sends identical but the synchronizing sequence that the acquisition frequency resource is different of length.
Corresponding with above-mentioned synchronizing sequence sending method, the method of terminal processes synchronizing sequence also is provided, comprise: the relevant or matching result of the signal that the terminal acquisition receives, described relevant or the subcarrier bandwidth of matching result correspondence system and the synchronizing sequence of corresponding transmission; The size of more above-mentioned relevant or matching result obtains maximum; According to subcarrier bandwidth corresponding to described maximum with and synchronizing sequence, obtain the subcarrier bandwidth of network side and the synchronizing sequence that this network side adopts.
Another embodiment of the present invention provides the system that carries out said method, and a kind of synchronizing sequence transmitting system is characterized in that, comprises
First ray sends subsystem, is used for the system for different subcarrier widths, sends and takies identical frequency resource but the different synchronizing sequence of length; Perhaps, the second sequence sends subsystem, is used for sending identical but the synchronizing sequence that the acquisition frequency resource is different of length.
A kind of sequential reception device also is provided, has it is characterized in that, comprised with lower unit:
Sample rate processing unit: be used for for the signal that receives, use two kinds of different sample rate S
1And S
2Sample S
2=S
1* 2, and S
1For subcarrier width is M
1The time sample rate corresponding to the shared bandwidth of P-SCH, S
2For subcarrier width is M
2The time sample rate corresponding to the shared bandwidth of P-SCH;
Search unit: be used for using local sequence to be correlated with from above-mentioned reception signal of sampling by different sample rates or to mate, obtain being correlated with or matching result
I=1,2, n=1,2,3, wherein
Corresponding sample rate S
1Perhaps S
2With sequence indicator u
n, described local sequence is in local that generate or storage, corresponding with the known network side P-SCH transmission sequence sequence of end side;
Decision unit: be used for the whole relevant or matching result under all sample rates relatively, judge the subcarrier width information of institute region of search and acquisition synchronizing information according to maximum.
The respective embodiments described above, sending method and system other information about the zone beyond can indicating cell ID, terminal correspondingly receives the method and apparatus of synchronizing sequence, can make terminal obtain other information about the zone beyond the ID of residential quarter.
Description of drawings
Fig. 1 is the frame structure schematic diagram of LTE system in the prior art;
Fig. 2 is the basic transformat schematic diagram of LTE system in the prior art;
Fig. 3 is the frequency domain schematic diagram of 15kHz subcarrier width system in the prior art;
Fig. 4 is synchronizing channel P-SCH and the position of S-SCH in frame structure in the prior art;
Fig. 5 is the flow chart of synchronizing sequence sending method in the execution mode one;
Fig. 6 is the frequency-domain structure figure of Fig. 6 two sub-carrier systems in the execution mode one;
Fig. 7 is the structural representation of synchronizing sequence transmitting system in the execution mode one;
Embodiment
A specific embodiment of the present invention provides a kind of synchronizing sequence sending method, system for different subcarrier widths, transmission takies identical frequency resource but the different synchronizing sequence of length, perhaps sends identical but the synchronizing sequence that the acquisition frequency resource is different of length.Corresponding with above-mentioned synchronizing sequence sending method, the method for terminal processes synchronizing sequence comprises: the relevant or matching result of the signal that the terminal acquisition receives, described relevant or the subcarrier bandwidth of matching result correspondence system and the synchronizing sequence of corresponding transmission; The size of more above-mentioned relevant or matching result obtains maximum; According to subcarrier bandwidth corresponding to described maximum with and synchronizing sequence, obtain the subcarrier bandwidth of network side and the synchronizing sequence that this network side adopts.
Embodiment one
In the present embodiment, provide a kind of method of sending and receiving of synchronizing sequence, can indicate the subcarrier width of different system.
The network side of communication system, one or more different base stations for example, with reference to figure 5, carry out the following step:
S11, be M for subcarrier width
1System, generating n1 length is L1, the basic sequence index is respectively u
11, u
12..., u
1n1The ZC sequence, n1 is natural number, and n1≤3, a described n1 sequence has high auto-correlation and low their 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
1* 2 system, generating n2 length is L2,
The index of basic sequence is respectively u
21, u
22..., u
2n2The ZC sequence, n2 is natural number, and n2≤3, a described n2 sequence has high auto-correlation and low their cross correlation, and u
22=L2-u
21, basic sequence index u
21, u
22..., u
2n2Near L2/2;
And aforementioned length L 1 has low their cross correlation between the ZC sequence of L2;
Particularly, the process of described formation sequence comprises and calculating, and perhaps obtains from the sequence of storage.
S12, being the system of M1 for subcarrier width, is that L1, basic sequence index are respectively u with 1 length of said n
11, u
12..., u
1n1The ZC sequence mapping to the shared running time-frequency resource of primary synchronization channel P-SCH, send described synchronizing sequence;
Be M for subcarrier width
2, M
2=M
1* 2 system is L2 with 2 length of said n, and the index of basic sequence is respectively u
21, u
22..., u
2n2The ZC sequence mapping to the shared running time-frequency resource of P-SCH, send described synchronizing sequence.
Like this, the sequence that has as above n1+n2 kind to send to transmitting terminal.To end side, adopt following step:
S21, the local sequence of use are carried out relevant with the signal that receives or coupling, 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 synchronizing sequence that sends of corresponding network side index be
Described local sequence is in local that generate or storage, corresponding with the known network side primary synchronization channel P-SCH transmission sequence sequence of end side, is an aforementioned n1+n2 sequence;
S22, these sizes relevant or matching result of comparison are got maximum;
S23, according to described maximum, judge the subcarrier bandwidth of system at transmitting terminal place and the synchronizing sequence that this system adopts.
The below lifts concrete example explanation, in this example, comprises the system of two sub-carrier width: 15kHz subcarrier width and 7.5kHz subcarrier width, and the concrete grammar in this example is:
At network side:
S31, to the system of 15kHz subcarrier width, it is 63 ZC sequence with length, the basic sequence index can be 25 or 29 or 34, be that 1 plural number 0 is filled in 63 sequence front in this length, the formation physical length is 64 sequence, is mapped on 64 subcarriers of this 15kHz subcarrier width system centre bandwidth;
S32, to the system of 7.5kHz subcarrier width, it is 127 ZC sequence with length, the basic sequence index is respectively 61 or 65 or 66, be that 1 plural number 0 is filled in 127 sequence front in this length, the formation physical length is 128 sequence, is mapped on 128 subcarriers of this 7.5kHz subcarrier width system centre bandwidth.
These three length are 127, and the basic sequence index is respectively 61,65, and 66 ZC sequence satisfies u
1=n1, u
2=127-n1, u
3=n2, namely wherein two basic sequence indexs form complementary relationships to sequence length 127, and three basic sequence indexs all 127 half near 64; These three length are that 127 ZC sequence has more satisfactory auto-correlation and their cross correlation; And satisfy with length be 63, index is that three basic sequences of 25,29,34 hang down cross-correlation.
The structure of the frequency domain that the method for above-mentioned mapping forms is with reference to figure 6.
In end side:
Used local matching sequence also is above-mentioned 6 sequences, and namely length is that 63 basic sequence indexs are that 25 and 29 and 34 ZC sequence and length are that 127 basic sequence indexs are respectively 61 and 65 and 66 ZC sequence.
S41, end side are carried out relevant with above-mentioned 6 sequences with the signal that receives or coupling, obtain relevant or matching result is A, B, C, D, E, F.The system that the corresponding subcarrier of described A is 15kHz and index are 25 ZC sequence, the system that the corresponding subcarrier of B is 15kHz and index are 29 ZC sequence, the system that the corresponding subcarrier of C is 15kHz and index are 34 ZC sequence, the system that the corresponding subcarrier of D is 7.5kHz and index are 61 ZC sequence, the system that the corresponding subcarrier of E is 7.5kHz and index are 65 ZC sequence, and the system that the corresponding subcarrier of F is 7.5kHz and index are 66 ZC sequence difference.
The size of S42, comparison A to F is got maximum,
S43, the subcarrier width of system of judging the transmitting terminal that this end side is corresponding according to this maximum and the synchronizing sequence of employing.Subcarrier width, sequence corresponding to this maximum that this maximum is corresponding are the subcarrier bandwidth of network side and the synchronizing sequence that this network side sends.
For example, suppose to be to the maximum A, what then can the decision network side send is that length is 63 under the 15kHz subcarrier, index is 25 ZC sequence; If be E to the maximum, what then can the decision network side send is that length is 63 under the 7.5kHz subcarrier, index is 65 ZC sequence.
In this embodiment, its beneficial effect is embodied in:
Because being 127 ZC sequence, above-mentioned three length have more satisfactory auto-correlation and their cross correlation, and they and length are that 63 ZC sequence has lower their cross correlation, so that terminal can be by searching for respectively P-SCH 6 ZC sequences (lower three length of 15kHz are that 63 ZC sequence and lower three length of 7.5kHz are 127 ZC sequence), when obtaining synchronizing information (length of synchronizing sequence, index etc.), can also obtain subcarrier width information.Simultaneously can find out that length is 127 sequence, so that sequence length is that 63 P-SCH occupies identical frequency bandwidth under the P-SCH under the 7.5kHz subcarrier width and the 15kHz subcarrier width, so that their net synchronization capability is close.
In other embodiment, when a plurality of adjacent DC MBMS zone is asynchronous, can not need 3 P-SCH sequences, only use this moment in the above-mentioned sequence one or two to get final product.
This embodiment also provides a kind of sequence transmitting system, and with reference to figure 7, namely First ray sends subsystem, and this system specifically comprises: the First ray generation unit: being used for for subcarrier width is M
1System, generating n1 length is L1, the basic sequence index is respectively u
11, u
12..., u
1n1The ZC sequence, n1 is natural number, and n1≤3, a described n1 sequence has high auto-correlation and low their cross correlation, and u
12=L1-u
11, basic sequence index u
11, u
12..., u
1n1Near L1/2;
The First ray processing unit: being used for for subcarrier width is M
1System, be that L1, basic sequence index are respectively u with 1 length of said n
11, u
12.., u
1n1The ZC sequence mapping to the shared running time-frequency resource of primary synchronization channel P-SCH, send described synchronizing sequence;
The second sequence generating unit: being used for for subcarrier width is M
2, M
2The system of=M1 * 2, generating n2 length is L2,
The index of basic sequence is respectively u
21, u
22..., u
2n2The ZC sequence, n2 is natural number, and n2≤3, a described n2 sequence has high auto-correlation and low their cross correlation, and u
22=L2-u
21, basic sequence index u
21, u
22.., u
2n2Near L2/2; And aforementioned length L 1 has low their cross correlation between the ZC sequence of L2;
The second series processing unit: being used for for subcarrier width is M
2, M
2The system of=M1 * 2 is L2 with 2 length of said n,
The index of basic sequence is respectively u
21, u
22.., u
2n2The ZC sequence mapping to the shared running time-frequency resource of 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 a plurality of base station.When First ray transmission subsystem was a base station, above-mentioned First ray generation unit and First ray processing unit and the second sequence generating unit and the second series processing unit were in same base station.
Concrete, take the DC zone of 7.5kHz subcarrier width as example, the dispensing device of its P-SCH on a base station comprises:
Sequence generating unit: generate length and be 127, the basic sequence index is 61,65 or 66 one of them ZC sequence;
Series processing unit: be that 1 plural number 0 is filled in 127 sequence front in this length, the formation physical length is 128 sequence, in the corresponding time resource of P-SCH, above-mentioned sequence mapping to 128 subcarriers of this 7.5kHz subcarrier width system centre bandwidth, is then carried out the processing of running time-frequency resource.
Embodiment two
In this embodiment, a kind of sending method and method of reseptance of synchronizing sequence are provided, subcarrier width information that can indication mechanism, for example 7.5kHz subcarrier width or 15kHz subcarrier width, when corresponding certain area type of the system of certain subcarrier width, information that also can the indicating area type when the zone of 7.5kHz subcarrier width must be the DC zone, can be DC zone or UC/MC zone by the present embodiment indication for example.
At network side:
S51, n sequence length of generation are that L, basic sequence index are respectively u
1, u
2.., u
nThe ZC sequence, n is natural number, n≤3, a described n sequence has high auto-correlation and low their 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 with above-mentioned ZC sequence, is mapped on the running time-frequency resource that the M1 subcarrier width P-SCH of system takies, and sends;
For M
2, M
2=M
1The system of * 2 subcarrier widths, with 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 are used two kinds of different sample rate S for the signal that receives
1And S
2Sample S
2=S
1* 2, and S
1For subcarrier width is M
1The time sample rate corresponding to the shared bandwidth of P-SCH, S
2For subcarrier width is M
2The time sample rate corresponding to the shared bandwidth of P-SCH;
S62, the reception signal that uses the different sample rates from above-mentioned process of local sequence to sample are correlated with or are mated, and obtain the relevant or matching result in n * 2
I=1,2, n=1,2,3, wherein
Corresponding sample rate S
iThe sequence indicator u that sends with network side
n, described local sequence is in local that generate or storage, corresponding with the known network side P-SCH transmission sequence sequence of end side;
S63, comparison said n * 2 a relevant or matching result
Obtain maximum;
S64, judge the subcarrier width of the network side that this is regional and the synchronizing sequence of network side according to this maximum.Corresponding subcarrier width, sequence corresponding to this maximum of sample rate that this maximum is corresponding is the subcarrier bandwidth of network side and the synchronizing sequence that this network side adopts.
The below is to comprise the DC zone of 7.5kHz subcarrier width in the system, the situation in the UC/MC zone of 15kHz subcarrier width is example, specifically describes.
At network side:
S71, for the UC/MC of 15kHz subcarrier zone, with length be 63, the basic sequence index is respectively 25,29,34 ZC sequence is mapped on the running time-frequency resource that the P-SCH of 15kHz subcarrier width system takies, and sends;
S72, regional for the DC of 7.5kHz subcarrier width, to adopt the identical sequence of ZC sequence with P-SCH under the aforementioned 15kHz subcarrier (is that sequence length is 63, the basic sequence index is respectively 25,29,34 ZC sequence), be mapped on the running time-frequency resource that the 7.5kHz subcarrier width P-SCH of system takies, send;
In the present embodiment, length is the frequency bandwidth that 63 sequence occupies the P-SCH under the 7.5kHz subcarrier width, be half of the occupied frequency bandwidth of P-SCH under the original 15kHz subcarrier, thereby reduced 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, thereby strengthened the compatibility of communication system.
In end side:
The step of the execution of above-mentioned terminal specifically comprises:
S81, end-on collect mail number with being correlated with three local sequences after the sample rate 0.96MHz sampling or mating.Local sequence is that sequence length is 63, the basic sequence index is respectively 25,29,34 ZC sequence.Relevant or the matching result that obtains, be A, B, C, respectively corresponding index be 25,29,34, the length relevant or matching result that to be 63 the local sequence of ZC obtain with the signal that receives under the sample rate 0.96MHz, 0.96MHz is subcarrier width sample rate corresponding to the shared bandwidth of P-SCH when being 15kHz.
S82, to received signal with being correlated with these three local sequences after the sample rate 0.48MHz sampling or mating.Obtain relevant or matching result for example is D, E, F, respectively corresponding index be 25,29,34, the length relevant or matching result that to be 63 the local sequence of ZC obtain with the signal that receives under the sample rate 0.48MHz, 0.48MHz is subcarrier width sample rate corresponding to the shared bandwidth of P-SCH when being 7.5kHz.
The size of S83, comparison A to F obtains maximum,
S84, obtain the subcarrier width of network side and the index of sequence according to this maximum.This maximum
Corresponding corresponding subcarrier width, sequence corresponding to this maximum of sample rate is the subcarrier bandwidth of network side and the synchronizing sequence that this network side adopts.
Suppose to be to the maximum A, can judge then that transmitting terminal sends be under the 15kHz subcarrier length as 63, index is 25 ZC sequence; If be E to the maximum, can judge then that transmitting terminal sends be under the 7.5kHz subcarrier length as 63, index is 29 ZC sequence, the rest may be inferred.
In the present embodiment, because being 63 ZC sequence, length has more satisfactory auto-correlation and their cross correlation; And the cross correlation between the sequence of former 63 long sequences and these 63 long half formation of sequence is lower, can guarantee to select correct result by above-mentioned search.
In this embodiment, a kind of system that carries out above-mentioned sequential transmission method also is provided, i.e. the second sequence transmitting system specifically comprises:
The 3rd sequence generating unit: being used for generating n sequence length is that L, basic sequence index are respectively u
1, u
2..., u
nThe ZC sequence, n is natural number, n≤3, a described n sequence has high auto-correlation and low their cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2.., u
nNear L/2;
The 3rd series processing unit: be used for for M
1The system of subcarrier width, with above-mentioned ZC sequence mapping to M
1On the running time-frequency resource that the P-SCH of subcarrier width system takies, send;
The 4th series processing unit: be used for for M
2, M
2=M
1The system of * 2 subcarrier widths, with 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 the 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 the second sequence sends subsystem, or a plurality of base station.When the second sequence transmission subsystem was a base station, above-mentioned the 3rd sequence generating unit and the 3rd series processing unit and the 4th series processing unit were in same base station.
Can find out from top scheme, when the second sequence transmission subsystem is a base station, only need the 3rd sequence generating unit in the system, namely reuse the 3rd sequence generating unit, thereby strengthened the compatibility of system, reduce the complexity of equipment.
Concrete, for the DC zone of 15kHz or 7.5kHz subcarrier width, the dispensing device of its P-SCH comprises:
Sequence generating unit: generate length and be 63, the basic sequence index is 25,29 or 34 one of them ZC sequences;
Series processing unit: be that 1 plural number 0 is filled in 63 sequence front in this length, the formation physical length is 64 sequence, in the corresponding time resource of P-SCH, above-mentioned sequence mapping to 64 subcarriers of this 15kHz or 7.5kHz subcarrier width system centre bandwidth, is then carried out the processing of running time-frequency resource.
This embodiment also provides a kind of synchronizing information receiving system to comprise:
Sample rate processing unit: be used for for the signal that receives, use two kinds of different sample rate S
1And S
2Sample S
2=S
1* 2, and S
1For subcarrier width is M
1The time sample rate corresponding to the shared bandwidth of P-SCH, S
2For subcarrier width is M
2The time sample rate corresponding to the shared bandwidth of P-SCH;
Search unit: be used for using local sequence to be correlated with from above-mentioned reception signal of sampling by different sample rates or to mate, obtain being correlated with or matching result
I=1,2, n=1,2,3, wherein
Corresponding sample rate S
1Perhaps S
2With sequence indicator u
n, described local sequence is in local that generate or storage, corresponding with the known network side P-SCH transmission sequence sequence of end side;
Decision unit: be used for the whole relevant or matching result under all sample rates relatively, judge the subcarrier width information of institute region of search and acquisition synchronizing information according to maximum.
Above-mentioned synchronizing information receiving system is on the terminal.
Take the subcarrier width system of 7.5kHz and 15kHz as example, the receiving system of P-SCH comprises:
The sample rate processing unit: control is to adopt to received signal different sample rates, for example 0.96MHz and 0.48MHz sample, sample rate corresponding to the shared bandwidth of P-SCH when wherein 0.96MHz is 15kHz corresponding to subcarrier width, sample rate corresponding to the shared bandwidth of P-SCH when 0.48MHz is 7.5kHz corresponding to subcarrier width;
Search unit: adopting for example reception signal processed of 0.96MHz and 0.48MHz of different sample rates, be 63 with the length of this locality storage respectively, the basic sequence index is that 25,29,34 the local sequence of ZC is carried out relevant or coupling, and records the result.
Decision unit: the whole relevant or match search result under all sample rates relatively, judge the subcarrier width information of institute region of search according to maximum, and obtain synchronizing information.
Can find out from said apparatus, although terminal will be done 6 search, but can reuse identical search unit for 0.96MHz with the reception signal under the 0.48MHz sampling processing, compare hardware resource with embodiment one and can save half, reduce the equipment complexity of terminal.
And; the sequence of having continued to use P-SCH 63 length under original 15kHz subcarrier of P-SCH design under this 7.5kHz subcarrier; the dual-mode base station that is conducive to UC/MC and DC is reused the P-SCH signal generating apparatus of network side and terminal and is reused synchronous searcher under the 15kHz subcarrier; reduce the complexity of base station transmitting terminal and terminal receiving device, and shared bandwidth resources have been saved half.
Embodiment three:
In this embodiment, providing a kind of method of sending and receiving of synchronizing sequence, can indicate the zones of different type under the same sub-carrier width, for example is DC zone or UC/MC zone.
At network side:
S91, same sub-carrier width but dissimilar zones are mapped to identical synchronizing sequence on the shared running time-frequency resource of primary synchronization channel P-SCH, send;
Different auxiliary synchronization channels is adopted in S92, described dissimilar zone.
For example, described auxiliary synchronization channel is different, and comprise a kind of of following situation or its combination in any: adopt different auxiliary synchronous SSC sequences, perhaps use different auxiliary synchronous scramblers, perhaps auxiliary synchronization channel S-SCH takies different running time-frequency resources.
In end side:
S101, terminal are come the type of distinguishable region by detecting auxiliary synchronization channel according to the auxiliary synchronization channel that detects.
The below describes as an example of the system that comprises DC zone and two kinds of area types of UC/MC of 15kHz subcarrier width example:
The primary synchronization channel P-SCH in network side: S111, DC zone reuses the primary synchronization channel P-SCH sequence in UC/MC zone, and for example employing length is 63 ZC sequence, and the index of basic sequence is respectively 25,29,34 1 or a plurality of sequence;
Different auxiliary synchronization channel S-SCH is adopted from UC/MC in S112, DC zone, and wherein different auxiliary synchronization channel S-SCH comprises a kind of of following situations or its combination in any: use different SSC sequences, use different scramblers, take different running time-frequency resource etc.
End side: S121, terminal can by detecting auxiliary synchronization channel S-SCH, be distinguished UC/MC zone and DC zone according to the auxiliary synchronization channel S-SCH that detects.
By said method, for the zone of same sub-carrier width, can pass through the type information of the transmission indicating area of synchronizing sequence, for example be UC/MC zone or DC zone; Terminal can be known the type information of above-mentioned zone by receiving synchronizing sequence.
In addition, the scheme that present embodiment three provides can with previous embodiment one combination, i.e. network side, for example one or more base station is carried out the step in present embodiment and the execution mode one simultaneously; Terminal is carried out the step in present embodiment and the execution mode one simultaneously.This more excellent execution mode can by primary synchronization channel P-SCH indication subcarrier width information, can be indicated by auxiliary synchronization channel S-SCH the type information of zones of different under the same sub-carrier width on the one hand on the other hand.
In addition, the scheme that present embodiment provides can with previous embodiment two combinations, i.e. network side, one or more base station is for example carried out the step of present embodiment and execution mode two simultaneously; Terminal is carried out the step in present embodiment and the execution mode two simultaneously.This more excellent execution mode, subcarrier width information that on the one hand can the indicating area, can also reduce primary synchronization channel P-SCH taking 7.5kHz subcarrier width system resource, strengthened the compatibility of communication system, on the other hand can be by the type information of zones of different under the auxiliary synchronization channel S-SCH indication same sub-carrier width.
Embodiment four:
In this embodiment, provide a kind of method of sending and receiving of synchronizing sequence, for the same sub-carrier width but dissimilar zones, type that can the indicating area, for example DC zone or UC/MC zone.
The below describes as an example of the system that comprises DC zone and two kinds of area types of UC/MC of 15kHz subcarrier width example:
Network side:
The primary synchronization channel P-SCH in S131, DC zone adopts one or more primary synchronization channel P-SCH sequence different from the MC/UC zone;
End side: S141, terminal can be distinguished the UC/MC of 15kHz subcarrier width and the DC of 15kHz subcarrier width by different primary synchronization channel P-SCH channels.
The sequence of 63 length is adopted in a concrete embodiment UC/MC zone, and the primary synchronization channel P-SCH in DC zone adopts the ZC sequence of other length, and for example length is 61 ZC sequence.
More specifically among embodiment, if the DC zone only needs 1 primary synchronization channel P-SCH sequence, for the primary synchronization channel P-SCH of the system at this place, DC zone, can use length is 63 ZC sequence, and the index of basic sequence is 38.
In the present embodiment, because 38 and 25 pairs of length 63 form complementary, so be that 38 sequence can be reused generation unit, the search unit that index is 25 sequence for index, thereby be conducive to like this base station and reuse the primary synchronization channel P-SCH signal generating apparatus of network side and the searcher that terminal is reused end side, reduce the complexity of base station transmitting terminal and terminal terminal side equipment.
In addition, the scheme that present embodiment provides can with embodiment one or embodiment two combinations, namely carry out simultaneously the step in present embodiment and embodiment one or the embodiment two.This more excellent execution mode on the one hand can be indicated subcarrier width information, type information that on the other hand can the indicating area.
Embodiment five
In this embodiment, provide the method for a kind of indicating area type information, type that can the indicating area, for example DC zone or UC/MC zone.
At network side: for dissimilar zones, adopt identical synchronous channel SCH and different broadcast channels (BCH, Broadcast Channel).Adopt identical synchronous channel SCH to comprise identical primary synchronization channel P-SCH and auxiliary synchronization channel S-SCH.
The below describes as an example of the system that comprises DC zone and two kinds of area types of UC/MC of 15kHz subcarrier width example:
At network side:
The DC Regional Gravity And primary synchronization channel P-SCH sequence in MC/UC zone.Reuse that the primary synchronization channel P-SCH that namely refers to the DC zone adopts and the identical sequence of primary synchronization channel P-SCH sequence in MC/UC zone.For example, if the primary synchronization channel P-SCH sequence in MC/UC zone employing length is 63 ZC sequence, the index of basic sequence is respectively 25,29,34 1 or a plurality of sequence, and the primary synchronization channel P-SCH in DC zone also adopts above-mentioned sequence so;
And the auxiliary synchronization channel S-SCH that the DC zone is identical with containing the employing of MC/UC zone;
And different broadcast channel BCH is adopted from the MC/UC zone in the DC zone; Wherein, different BCH channels is a kind of of following situations or its combination in any: the different information contents, use different coded modulation schemes, take different running time-frequency resources, use different scrambler etc.
In end side: it is regional that terminal can be distinguished the DC of the UC/MC zone of 15kHz subcarrier width and 15kHz subcarrier width by different BCH channels.
By said method, can by the type information of different broadcast channel BCH indicating areas, for example be UC/MC zone or DC zone; Terminal can be known the type information of above-mentioned zone by different broadcast channel BCH.
In addition, the scheme that present embodiment provides can with embodiment one or embodiment two combinations, namely carry out simultaneously step in this real-time mode and the step of concrete real-time mode one or embodiment two, on the one hand can indicate subcarrier width information, type information that on the other hand can the indicating area.
Claims (17)
1. a synchronizing sequence sending method is characterized in that,
For the system of different subcarrier widths, send identical but the synchronizing sequence that the acquisition frequency resource is different of length.
2. the method for transmission synchronizing sequence according to claim 1 is characterized in that,
Described system for different subcarrier widths sends the identical but step synchronizing sequence that the acquisition frequency resource is different of length and comprises:
Generating n sequence length is that L, basic sequence index are respectively u
1, u
2.., u
nThe ZC sequence, n is natural number, n≤3, a described n sequence has high auto-correlation and low their 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 with above-mentioned ZC sequence, is mapped to M
1On the running time-frequency resource that the P-SCH of subcarrier width system takies, send;
For M
2, M
2=M
1The system of * 2 subcarrier widths, with above-mentioned ZC sequence mapping to M
2On the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
3. the method for transmission synchronizing sequence according to claim 2 is characterized in that,
A described n sequence length is that L, basic sequence index are respectively u
1, u
2.., u
nThe ZC sequence be specially that 3 sequence lengths are 63, the basic sequence index is respectively 25,29,34 ZC sequence;
Described M
1Subcarrier width is specially 7.5kHz,
Described M
2, M
2=M
1* 2 subcarrier widths are specially 15kHz.
4. the method for the described transmission synchronizing sequence of arbitrary claim according to claim 1-3 is characterized in that the method also comprises:
For the same sub-carrier width but dissimilar zones identical main synchronizing sequence is mapped on the shared running time-frequency resource of primary synchronization channel P-SCH, send;
Different auxiliary synchronization channels is adopted in described dissimilar zone.
5. method according to claim 4, it is characterized in that described same sub-carrier width but dissimilar zones are specially: the special carrier DC zone of 15kHz subcarrier width, the unicast carriers of 15kHz subcarrier width or mixed carrier UC/MC zone;
It is 63 ZC sequence that described identical main synchronizing sequence is specially length, and the index of basic sequence is respectively 25,29,34 1 or a plurality of sequence.
6. method according to claim 4, it is characterized in that, described different auxiliary synchronization channel comprises a kind of of following situation or its combination in any: adopt different secondary synchronization sequences, perhaps use different auxiliary synchronous scramblers, perhaps auxiliary synchronization channel S-SCH takies different running time-frequency resources.
7. the method for the described transmission synchronizing sequence of arbitrary claim according to claim 1-3 is characterized in that the method also comprises:
For the same sub-carrier width but dissimilar zones different main synchronizing sequences is mapped on the shared running time-frequency resource of primary synchronization channel P-SCH, send.
8. method according to claim 7 is characterized in that, described same sub-carrier width but dissimilar zones are specially: the DC zone of 15kHz subcarrier width, the UC/MC zone of 15kHz subcarrier width; Described different sequence is specially: be that the index of 63 basic sequence is respectively 25,29,34 ZC sequence for length for the UC/MC of 15kHz subcarrier width zone; DC zone for the 15kHz subcarrier width is other sequence.
9. method according to claim 8 is characterized in that, for the DC of 15kHz subcarrier width zone, described other sequence is specially 1 ZC sequence that length is the index 38 of 63 basic sequence.
10. the method for the described transmission synchronizing sequence of arbitrary claim according to claim 1-3 is characterized in that the method also comprises:
Identical synchronous channel SCH and different broadcast channel BCH are adopted from the MC/UC zone in the DC zone.
11. the method for transmission synchronizing sequence according to claim 10, it is characterized in that described different BCH channel comprises a kind of of following situations or its combination in any: the different information contents, use different coded modulation schemes, take different running time-frequency resources, use different scramblers.
12. a synchronizing sequence method of reseptance is characterized in that,
Relevant or the matching result of the signal that the terminal acquisition receives, described relevant or the subcarrier bandwidth of matching result correspondence system and the synchronizing sequence that the map network side sends;
The size of more above-mentioned relevant or matching result obtains maximum;
According to subcarrier bandwidth corresponding to described maximum with and synchronizing sequence, obtain the subcarrier bandwidth of system and the synchronizing sequence that this network side sends.
13. synchronizing sequence method of reseptance according to claim 12 is characterized in that,
The step relevant or matching result of the signal that described terminal acquisition receives specifically comprises:
Terminal is used two kinds of different sample rate S for the signal that receives
1And S
2Sample S
2=S
1* 2, and S
1For subcarrier width is M
1The time sample rate corresponding to the shared bandwidth of P-SCH, S
2For subcarrier width is M
2The time sample rate corresponding to the shared bandwidth of P-SCH;
The reception signal that uses the different sample rates from above-mentioned process of local sequence to sample is correlated with or is mated, and obtains relevant or matching result
I=1,2, n=1,2,3, wherein
Corresponding sample rate S
iThe sequence indicator u that sends with network side
n, described local sequence is in local that generate or storage, corresponding with the known network side P-SCH transmission sequence sequence of end side.
14. synchronizing sequence method of reseptance according to claim 13 is characterized in that,
Described sample rate S
1And S
2Be respectively 0.48MHz, 0.96MHz, described M
1Be specially the 7.5kHz subcarrier width, described M
2Be specially the 15kHz subcarrier width.
15. a synchronizing sequence transmitting system is characterized in that, comprises
The second sequence sends subsystem, is used for sending identical but the synchronizing sequence that the acquisition frequency resource is different of length.
16. synchronizing sequence transmitting system according to claim 15 is characterized in that,
Described the second sequence sends subsystem, specifically comprises:
The 3rd sequence generating unit: being used for generating n sequence length is that L, basic sequence index are respectively u
1, u
2.., u
nThe ZC sequence, n is natural number, n≤3, a described n sequence has high auto-correlation and low their cross correlation, and u
2=L-u
1, and basic sequence index u
1, u
2..., u
nNear L/2;
The 3rd series processing unit: be used for for M
1The system of subcarrier width, with above-mentioned ZC sequence mapping to M
1On the running time-frequency resource that the P-SCH of subcarrier width system takies, send;
The 4th series processing unit: be used for for M
2, M
2=M
1The system of * 2 subcarrier widths, with above-mentioned ZC sequence mapping to M
2On the running time-frequency resource that the P-SCH of subcarrier width system takies, send.
17. a sequential reception device is characterized in that, comprises with lower unit:
Sample rate processing unit: be used for for the signal that receives, use two kinds of different sample rate S
1And S
2Sample S
2=S
1* 2, and S
1For subcarrier width is M
1The time sample rate corresponding to the shared bandwidth of P-SCH, S
2For subcarrier width is M
2The time sample rate corresponding to the shared bandwidth of P-SCH;
Search unit: be used for using local sequence to be correlated with from above-mentioned reception signal of sampling by different sample rates or to mate, obtain being correlated with or matching result
I=1,2, n=1,2,3, wherein
Corresponding sample rate S
1Perhaps S
2With sequence indicator u
n, described local sequence is in local that generate or storage, corresponding with the known network side P-SCH transmission sequence sequence of end side;
Decision unit: be used for the whole relevant or matching result under all sample rates relatively, judge the subcarrier width information of institute region of search and acquisition synchronizing information according to maximum.
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|---|---|---|---|---|
| CN105009656A (en) * | 2014-01-29 | 2015-10-28 | 华为技术有限公司 | Method and device for clock synchronization |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791084A (en) * | 2004-12-17 | 2006-06-21 | 清华大学 | Time-domain synchronous OFDM space-frequency coding time-frequency combination channel estimating method |
| CN101032140A (en) * | 2004-08-10 | 2007-09-05 | 西门子公司 | Method for generating preamble structures and signaling structures in a mimo OFDM transmission system |
-
2007
- 2007-12-19 CN CN201210404717.3A patent/CN102916925B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101032140A (en) * | 2004-08-10 | 2007-09-05 | 西门子公司 | Method for generating preamble structures and signaling structures in a mimo OFDM transmission system |
| CN1791084A (en) * | 2004-12-17 | 2006-06-21 | 清华大学 | Time-domain synchronous OFDM space-frequency coding time-frequency combination channel estimating method |
Non-Patent Citations (2)
| Title |
|---|
| HUAWEI: "Optimised P-SCH sequences", 《TSG RAN WG1 MEETING #49BIS》 * |
| 严春林；李少谦；唐友喜；罗霄；房家奕: "一种利用重复序列的OFDM频率同步新方法", 《电子与信息学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105009656A (en) * | 2014-01-29 | 2015-10-28 | 华为技术有限公司 | Method and device for clock synchronization |
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