CN101938441A - Synchronization sequence sending and receiving methods for realizing synchronous access and corresponding device - Google Patents
Synchronization sequence sending and receiving methods for realizing synchronous access and corresponding device Download PDFInfo
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- CN101938441A CN101938441A CN2009101506857A CN200910150685A CN101938441A CN 101938441 A CN101938441 A CN 101938441A CN 2009101506857 A CN2009101506857 A CN 2009101506857A CN 200910150685 A CN200910150685 A CN 200910150685A CN 101938441 A CN101938441 A CN 101938441A
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Abstract
The invention discloses synchronization sequence sending and receiving methods for realizing synchronous access and a corresponding device. The sending method comprises that: a base station forms auxiliary lead code sequences by a plurality of fundamental sequence subblocks or obtains the auxiliary lead code sequences by expanding the plurality of fundamental sequence subblocks according to the lengths of the auxiliary lead code sequences which correspond to different system bandwidths, modulates the auxiliary lead code sequences, and sequentially maps the auxiliary lead code sequences to subcarriers in an auxiliary lead code subcarrier set, wherein the number of the subcarriers is equal to the length of the auxiliary lead code sequences; and the base station sends a main lead code containing system bandwidth information and one or more of auxiliary lead codes containing cell and/or sector information in a superframe. Through the design of a fundamental auxiliary synchronization sequence, the expansion of channel bandwidths with different configurations is supported, the requirement of expandability of a next-generation broadband access system is met, and the process of accessing a terminal can be greatly accelerated.
Description
Technical field
The present invention relates to the time-frequency domain simultaneous techniques of digital communication, relate in particular to synchronizing sequence sending, receiving method and corresponding device thereof that mobile communication system inserts synchronously.
Background technology
As a kind of multi-carrier transmission pattern, OFDM (OFDM, Orthogonal FrequencyDivision Multiplex) is converted to one group of low-speed parallel data flow transmitted by data flow, system is reduced greatly to the susceptibility of multidiameter fading channel frequency selectivity a high-speed transfer; And the introducing of Cyclic Prefix has further strengthened the ability of the anti-intersymbol interference of system (ISI, Inter-symbol Interference) again.In addition, the bandwidth availability ratio height, realize that characteristics such as simple make the application of OFDM in the radio communication basin more and more wider.Such as, wlan system, based on the 802.16e system of orthogonal frequency division multiplexing multiple access, and the follow-on evolution 802.16m of 802.16e system (the 4th generation communication system) etc., all be based on the system of OFDM technology.
In order to satisfy effective application of low deferred traffic in the NGBW communication system, in the design of frame structure, three layers of mentality of designing of superframe, unit frame and subframe have mainly been considered, referring to the composition schematic diagram of frame structure shown in Figure 1.Superframe 101 is formed (103 are control information) by 4 unit frame 102.Unit frame 102 is made up of the individual subframe unit 104 of M (be generally 8, can be 6 or 7 etc.), and subframe unit 104 is divided into descending sub frame unit and sub-frame of uplink unit, can be configured according to system.Subframe unit 104 is made of the individual OFDM symbol 105 of N (can be 5,6,7 or 9 etc.).
In the 4th generation communication system, for time synchronized, ofdm system mainly contains auto-correlation (AC, Auto-Correlation) method for synchronous and cross-correlation (CC, Cross-Correlation) method for synchronous.Wherein, the AC method is to utilize a synchronizing channel (SCH, Synchronization Channel) the full characteristic together of two parts before and after the symbol, when the front and back two parts of signals is made related operation, the peak value that will occur at the correlation of time synchronized position reaches synchronous purpose according to this as the time synchronized point.The CC method then is to utilize the local primary synchronization channel (P-SCH that produces, Primary-Synchronization Channel) time series is made related operation with the signal that receives, to occur peak value at the correlation of time synchronized position as the time synchronized point, reach synchronous purpose with this.Verified, the performance of CC method is better than the AC method, but algorithm complex is higher.The performance of AC method and signal to noise ratio relation are very big, so, in the ofdm system that adopts the AC method, peak-to-average power ratio (the PAPR of synchronizing symbol, Peak Average PowerRate) low, therefore, can be by improve the detection performance of AC method greatly with respect to the power ascension (Power Boost) of data symbol.
There is different system configuration in different base station systems, as different system bandwidths, different multi-carrier mode or the like.These different system configuration will influence the sequences Design of synchronizing channel.In present system synchronization channel design, at different system bandwidths, design different length and different sequences usually, belong to the synchronization channel design mode that can not expand.The NGBW connecting system, bandwidth range is increasing, if synchronizing sequence is designed and sent in the base station according to traditional synchronization channel design mode, can cause the design of synchronizing sequence and send very complexity, and the terminal access procedure is very slow.Therefore, need improve, make its demand that can satisfy broadband access system bandwidth expansion of future generation existing synchronization channel design method and the corresponding synchronizing sequence sending, receiving method that inserts synchronously of realizing, and can the accelerating terminal access procedure.
Summary of the invention
Technical problem to be solved by this invention provides a kind of sending, receiving method and corresponding device thereof that realizes access synchronously, can satisfy the demand of broadband access system bandwidth expansion of future generation.
In order to solve the problems of the technologies described above, the invention provides a kind of synchronizing sequence sending method of access synchronously that realizes, comprising:
The base station is at the length of the different pairing auxilliary preamble sequences of system bandwidth, form auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or by the auxilliary preamble sequence of the sub-piece expansion of a plurality of basic sequences acquisition, and will assist on the subcarrier that is mapped to successively after preamble sequence is modulated in the auxilliary lead code subcarrier set, the number of subcarrier equals the length of auxilliary preamble sequence;
The base station sends main lead code that contains system bandwidth information and the one or more auxilliary lead code that contains sub-district and/or sector auxiliary information in superframe.
Further,, form auxilliary preamble sequence, or obtain auxilliary preamble sequence, be meant by the sub-piece expansion of a plurality of basic sequences by the sub-piece of a plurality of basic sequences at the length of the different pairing auxilliary preamble sequences of system bandwidth:
At minimum system bandwidth the shortest pairing sequence length, form auxilliary preamble sequence by N the sub-piece of basic sequence, N is the integer greater than 1; Or at pairing greater than the length of the auxilliary preamble sequence of short sequence length greater than minimum system bandwidth, carrying out part by N the sub-piece of basic sequence repeats or repeats fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of N*L+M, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Further, N is 8,
The base station is formed auxilliary preamble sequence at the shortest sequence length of the pairing auxilliary lead code of minimum system bandwidth by 8 sub-pieces of basic sequence;
Perhaps, the base station is that the integral multiple of minimum system bandwidth is pairing greater than the length of the auxilliary preamble sequence of short sequence length at system bandwidth, 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L;
Perhaps, the base station is the non-integral multiple pairing greater than the length of the auxilliary preamble sequence of short sequence length of described minimum system bandwidth at system bandwidth, 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L+M.
Further,
The number of auxilliary lead code subcarrier set is determined available subcarrier is divided into according to the frequency duplex factor as one of auxilliary lead code in the base station, and in a plurality of auxilliary lead code subcarrier set is used in sub-district and/or described sector; The base station will be assisted preamble sequence and modulate according to the sign of sub-district and/or the sign of described sector.
In order to solve the problems of the technologies described above, the invention provides a kind of synchronizing sequence method of reseptance of access synchronously of realizing, comprising:
Terminal detects the main lead code in the superframe that receives, and carries out Time and Frequency Synchronization, and obtains the system bandwidth information of carrying in the main lead code; Length according to the pairing auxilliary preamble sequence of system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming by the sub-piece of a plurality of basic sequences or form by the expansion of the sub-piece of a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information.
Further, length according to the pairing auxilliary preamble sequence of system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover form by the sub-piece of a plurality of basic sequences or by the auxilliary preamble sequence that the expansion of the sub-piece of a plurality of basic sequences is formed, be meant:
Subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth is carried out signal decoding, demodulation successively, recover by N the sub-piece of basic sequence, and be combined into complete auxilliary preamble sequence, N is the integer greater than 1;
Perhaps, to carry out signal decoding, demodulation successively greater than the subcarrier in the auxilliary lead code subcarrier set of the shortest sequence length greater than minimum system bandwidth is pairing, recovering total number is the sub-piece of auxilliary preamble sequence of N*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Further, N is 8,
Terminal is carried out signal decoding, demodulation successively with the subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth, recovers 8 sub-pieces of basic sequence, and is combined into complete auxilliary preamble sequence;
Perhaps, terminal will be carried out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the pairing sequence length of system bandwidth of minimum system bandwidth integral multiple, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L, and is combined into complete auxilliary preamble sequence;
Perhaps, terminal will be carried out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the non-integral multiple pairing sequence length of system bandwidth of minimum system bandwidth, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L+M, and is combined into complete auxilliary preamble sequence.
Further,
Terminal is carried out signal decoding, demodulation successively with the subcarrier in the auxilliary lead code subcarrier set of correspondence, obtains the sign of the sub-district in the corresponding auxilliary preamble sequence and/or the sign of described sector, thereby obtains corresponding cell information and/or sector auxiliary information.
In order to solve the problems of the technologies described above, the invention provides a kind of synchronizing sequence dispensing device of access synchronously of realizing, comprise the main lead code sending module that connects successively, auxilliary lead code modulation mapping block and auxilliary lead code sending module; Wherein:
Main lead code sending module is used for containing the main lead code of system bandwidth information in corresponding superframe transmission, and will command wide information and export to auxilliary lead code modulation mapping block;
Auxilliary lead code modulation mapping block, be used for length at the different pairing auxilliary preamble sequences of system bandwidth, form auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or be extended to auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, and will assist on the subcarrier that is mapped to successively after preamble sequence is modulated in the auxilliary lead code subcarrier set, the number of subcarrier equals the length of auxilliary preamble sequence;
Auxilliary lead code sending module, the one or more auxilliary preamble sequence that is used for will being mapped as subcarrier on corresponding superframe and character position sends.
Further,
Auxilliary lead code modulation mapping block at the length of the different pairing auxilliary preamble sequences of system bandwidth, is formed auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or is extended to auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, is meant:
At the shortest sequence length of the pairing auxilliary lead code of minimum system bandwidth, form auxilliary preamble sequence by 8 sub-pieces of basic sequence; Perhaps, at system bandwidth is that the integral multiple of minimum system bandwidth is pairing greater than the length of the auxilliary preamble sequence of short sequence length, 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L; Perhaps, at system bandwidth is the non-integral multiple pairing greater than the length of the auxilliary preamble sequence of short sequence length of minimum system bandwidth, 8 sub-pieces of basic sequence are carried out part to be repeated or repeats fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L+M, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Further,
Auxilliary lead code modulation mapping block according to the frequency duplex factor as one of auxilliary lead code, determines available subcarrier is divided into the number of auxilliary lead code subcarrier set, and in a plurality of auxilliary lead code subcarrier set is used in sub-district and/or sector; According to the sign of sub-district and/or the sign of sector, will assist preamble sequence and modulate.
In order to solve the problems of the technologies described above, the invention provides a kind of synchronizing sequence receiving system of access synchronously of realizing, comprise interconnective main preamble detection module and auxilliary lead code decoder module, wherein:
Main preamble detection module is used for detecting the main lead code of the superframe of reception, carry out Time and Frequency Synchronization, and the system bandwidth information that will obtain from main lead code is exported to auxilliary lead code decoder module;
Auxilliary lead code decoder module, be used for length according to the pairing auxilliary preamble sequence of system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming by the sub-piece of a plurality of basic sequences or form by the expansion of the sub-piece of a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information.
Further,
Auxilliary lead code decoder module, sequence length according to the pairing auxilliary lead code of system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover form by the sub-piece of a plurality of basic sequences or by the auxilliary preamble sequence that the expansion of the sub-piece of a plurality of basic sequences is formed, be meant:
Subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth is carried out signal decoding, demodulation successively, recover 8 sub-pieces of basic sequence, and be combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the pairing sequence length of system bandwidth of minimum system bandwidth integral multiple, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L, and is combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the non-integral multiple pairing sequence length of system bandwidth of minimum system bandwidth, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Further,
Auxilliary lead code decoder module, subcarrier in the auxilliary lead code subcarrier set of correspondence is carried out signal decoding, demodulation successively, obtain the sign of the sub-district in the corresponding auxilliary preamble sequence and/or the sign of sector, thereby obtain corresponding cell information and/or sector auxiliary information.
Synchronizing sequence sending, receiving method and corresponding device thereof that the realization that proposes by the present invention inserts synchronously, can support the expansion of different configuration channel bandwidths by the design of basic secondary synchronization sequences, satisfy the extendible requirement of broadband access system of future generation, and the access procedure of accelerating terminal greatly.
Description of drawings
Fig. 1 is existing schematic diagram with frame structure of superframe, unit frame and subframe;
Fig. 2 is the sending, receiving method flow chart that the realization of the embodiment of the invention inserts synchronously;
Fig. 3 a, 3b, 3c are three examples that send main lead code and auxilliary lead code in the embodiment of the invention method;
Adopt three examples of the auxilliary lead code of extendible sequential structure in Fig. 4 a, 4b, the 4c embodiment of the invention method;
Fig. 5 is that the embodiment of the invention realizes the structured flowchart of the dispensing device of access synchronously;
Fig. 6 is that the embodiment of the invention realizes the structured flowchart of the receiving system of access synchronously.
Embodiment
Sending, receiving method and corresponding device thereof that realization provided by the invention inserts synchronously, its inventive concept is, the base station, base station sends main lead code and adopts the auxilliary lead code of sequence spreading structure in superframe, extendible sequential structure comprises basic sequence structure and sequence spreading structure.The basic sequence structure is meant that the auxilliary preamble sequence with the pairing the shortest sequence length of minimum system bandwidth is divided into N the sub-piece of basic sequence, is mapped to corresponding auxilliary lead code set of subcarriers successively after the sub-piece of this N basic sequence is modulated; The sequence spreading structure is meant and repeats or whole repetitions carrying out part greater than pairing N the sub-piece of dividing equally greater than the most auxilliary preamble sequence of short sequence length of basic sequence of minimum system bandwidth, is mapped to corresponding auxilliary lead code set of subcarriers successively after the sequence after repeating is modulated.
Below in conjunction with accompanying drawing and preferred embodiment technical scheme of the present invention is done to describe in detail.Though following examples are synchronous with the terminal time-frequency domain in superframe, unit frame and three layers of frame structure of subframe, only are used for description and interpretation the present invention, and do not constitute the restriction to technical solution of the present invention.
As shown in Figure 2, the present invention is an example with the BWA, provides to realize that the base station of inserting synchronously sends, the flow process of terminal method of reseptance embodiment, comprises the steps:
210: the base station sends main lead code and auxilliary lead code in superframe, auxilliary lead code adopts extendible sequential structure;
Wherein, main lead code is carried control information, and this control information comprises the bandwidth information of system; Auxilliary lead code contains cell information and/or sector auxiliary information.
The structure of lead code is made up of a main lead code (P-Preamble) and one or more auxilliary lead code (S-Preamble) shown in Fig. 3 (comprising Fig. 3 a, Fig. 3 b and Fig. 3 c).
The base station sends once main lead code 203 and three auxilliary lead codes 201 (202 is the superframe head) in a superframe.Shown in Fig. 3 is exactly the position of main lead code and auxilliary lead code corresponding transmission symbol in a superframe.
Three auxilliary lead codes 201 are respectively that first symbol of the 1st, 3,4 unit frame (being unit frame 0,2,3) sends in superframe in Fig. 3 a, and once main lead code 203 is that first symbol of the 2nd unit frame (being unit frame 1) sends in superframe.
Three auxilliary lead codes 201 are respectively that first symbol of the 1st, 2,4 unit frame (being unit frame 0,1,3) sends in superframe in Fig. 3 b, and once main lead code 203 is that first symbol of the 3rd unit frame (being unit frame 2) sends in superframe.
Three auxilliary lead codes 201 are respectively that first symbol of the 2nd, 3,4 unit frame (being unit frame 1,2,3) sends in superframe in Fig. 3 c, and once main lead code 203 is that first symbol of the 1st unit frame (being unit frame 0) sends in superframe.
For different system bandwidths or FFT size (FFT Size), main preamble sequence length is fixing.In the present embodiment, the length of main preamble sequence is 216bits.
For different system bandwidths or FFT size, the length difference of auxilliary preamble sequence.For example for 5M, 10M and 20M system bandwidth (correspondence 512,1024 and 2048FFT size), the length of auxilliary preamble sequence is respectively 144bits, 288bits and 576bits.
The frequency duplex factor as one of auxilliary lead code is 3, thus available subcarrier is divided into 3 auxilliary lead code subcarrier set, and in 3 auxilliary lead code subcarrier set is used in each sector (Segment) or sub-district.The length of the auxilliary preamble sequence under the number of sub carrier wave that comprises in auxilliary lead code subcarrier set and the corresponding system bandwidth is identical, and promptly each subcarrier is corresponding to a factor in the auxilliary preamble sequence.
The base station is at because of different these characteristics of its auxilliary preamble sequence length of different system bandwidths, but adopt the auxilliary lead code of sequence spreading structure, that is will assist preamble sequence at the auxilliary different sequence length of lead code and be defined as basic sequence structure and sequence spreading structure, and carry out auxilliary accordingly lead code modulation and subcarrier shines upon.
Wherein, the basic sequence structure is according to basic sequence length the auxilliary preamble sequence of short sequence length (promptly have), will assist preamble sequence and be divided into N the sub-piece of the basic sequence (length of the sub-piece of each sequence=auxilliary preamble sequence length/N), be respectively P1, P2 ..., PN.According to cell ID ID and/or sector mark Segment ID, after the auxilliary preamble sequence that the sub-piece of this N basic sequence is formed is modulated, be mapped to successively on the subcarrier in the corresponding auxilliary lead code subcarrier set.
The sequence spreading structure is according to sequence spreading length (be sequence length greater than the most auxilliary preamble sequence of short sequence length), N the sub-piece of basic sequence that auxilliary preamble sequence is divided equally carries out part repetition or all repetitions, formation has N*L+M, and (L is for greater than 1 natural number, and M is more than or equal to 0 and less than the even number of N; M=0 when bandwidth is the multiple of minimum bandwidth) the auxilliary preamble sequence of the sub-piece of individual auxilliary preamble sequence is on the subcarrier of assisting in the subcarrier set that is mapped to corresponding auxilliary lead code after preamble sequence is modulated successively.
For example for the situation of 5M system bandwidth (corresponding 512FFT size), its auxilliary preamble sequence length is 144bits, belongs to above-mentioned basic sequence length.To assist preamble sequence and be divided into 8 sub-pieces of basic sequence (length of the sub-piece of each sequence is 18bits), shown in Fig. 4 a, be respectively P1, P2, P3, P4, P5, P6, P7, P8.According to sector mark Segment ID, be mapped to successively after will modulating by the auxilliary preamble sequence that these 8 sub-pieces of basic sequence are formed on 144 subcarriers in the corresponding auxilliary lead code subcarrier set.
For the situation greater than the 5M system bandwidth, with 8 sub-piece P1 of basic sequence, P2, P3, P4, P5, P6, P7, P8 repeat to form and have N*L+M that (L is for greater than 1 natural number, and M is more than or equal to 0 and less than the even number of N; M=0 when bandwidth is the multiple of minimum bandwidth) the auxilliary preamble sequence of the sub-piece of individual auxilliary preamble sequence, and will assist on the subcarrier that is mapped to successively after preamble sequence is modulated in the corresponding auxilliary lead code subcarrier set.
For example for the situation of 10M system bandwidth (corresponding 1024FFT size), its auxilliary preamble sequence length is 288bits, belongs to above-mentioned sequence spreading length.8 sub-pieces of basic sequence are repeated to form the sub-piece of the individual auxilliary preamble sequence of 16 (8*2), be respectively P5, P6, P7, P8, P1, P2, P3, P4, P5, P6, P7, P8, P1, P2, P3, P4 shown in Fig. 4 b, will be mapped to after will being modulated by the auxilliary preamble sequence that the sub-piece of these auxilliary preamble sequences is formed on 288 subcarriers in the corresponding auxilliary lead code subcarrier set successively.
For example for the situation of 20M system bandwidth (corresponding 2048FFT size), its auxilliary preamble sequence length is 576bits, belongs to sequence spreading length.8 sub-pieces of basic sequence are repeated to form the sub-piece of 32 (8*4) individual auxilliary preamble sequence, be respectively P5, P6, P7, P8, P1, P2, P3, P4, P5, P6, P7, P8, P1, P2, P3, P4, P5, P6, P7, P8, P1, P2, P3, P4, P5, P6, P7, P8, P1, P2, P3, P4 shown in Fig. 4 c, will be mapped to after will being modulated by the auxilliary preamble sequence that the sub-piece of these auxilliary preamble sequences is formed on 576 subcarriers in the corresponding auxilliary lead code subcarrier set successively.
Certainly, except the said system bandwidth was the integral multiple of 5M, it was the non-integral multiple situation of 5M that system bandwidth is also arranged, such as system bandwidth is that 1.5 times of 5M are 7.5M, also was applicable to the sequential structure of extendible auxilliary lead code of the present invention.
220: terminal detects main preamble sequence, carries out Time and Frequency Synchronization, and obtains the system bandwidth information that main preamble sequence carries;
230: terminal is obtained cell information and/or sector auxiliary information according to the decode auxilliary preamble sequence of corresponding bandwidth of system bandwidth information from auxilliary preamble sequence.
Terminal is according to the sequence length of the pairing auxilliary lead code of described system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming or forming by the expansion of the sub-piece of a plurality of basic sequences by the sub-piece of a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information.
For example, the subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth is carried out signal decoding, demodulation successively, recover by N the sub-piece of basic sequence, and be combined into complete auxilliary preamble sequence, N is the integer greater than 1; Perhaps, to carry out signal decoding, demodulation successively greater than the subcarrier in the auxilliary lead code subcarrier set of the shortest sequence length greater than minimum system bandwidth is pairing, recovering total number is the sub-piece of auxilliary preamble sequence of N*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
As shown in Figure 5, be to the present invention is directed to the foregoing description, the structured flowchart of the base station transmission apparatus embodiment that the realization that provides inserts synchronously, this dispensing device 500 comprises the main lead code sending module 510 that connects successively, auxilliary lead code modulation mapping block 520 and auxilliary lead code sending module 530, wherein:
Main lead code sending module 510 is used for containing system bandwidth information master lead code in corresponding superframe transmission, and system bandwidth information is exported to auxilliary lead code modulation mapping block 520;
Auxilliary lead code modulation mapping block 520, be used for length at the different pairing auxilliary preamble sequences of system bandwidth, form auxilliary preamble sequence by the sub-piece of N basic sequence, or be extended to auxilliary preamble sequence by the sub-piece of N basic sequence, and will assist on the subcarrier that is mapped to successively after preamble sequence is modulated in the auxilliary lead code subcarrier set, the number of described subcarrier equals the length of described auxilliary preamble sequence;
Auxilliary lead code modulation mapping block 520 at the shortest sequence length of the pairing auxilliary lead code of minimum system bandwidth, is made of the sequence of auxilliary lead code 8 sub-pieces of basic sequence; Perhaps, at system bandwidth is that the integral multiple of minimum system bandwidth is pairing greater than the length of the auxilliary preamble sequence of short sequence length, 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L; Perhaps, at system bandwidth is the non-integral multiple pairing greater than the length of the auxilliary preamble sequence of short sequence length of minimum system bandwidth, 8 sub-pieces of basic sequence are carried out part to be repeated or repeats fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L+M, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Auxilliary lead code sending module 530, the auxilliary preamble sequence that is used for will being mapped as subcarrier on corresponding superframe and character position sends.
As shown in Figure 6, be to the present invention is directed to the foregoing description, the structured flowchart of the terminal receiving system embodiment that the realization that provides inserts synchronously, this receiving system 600 comprises the main preamble detection module 610 that connects successively, auxilliary lead code decoder module 620 and auxilliary preamble information access module 630, wherein:
Main preamble detection module 610 is used for detecting the main lead code of the superframe of reception, carry out Time and Frequency Synchronization, and the system bandwidth information that will obtain from main lead code is exported to auxilliary lead code decoder module 620;
Auxilliary lead code decoder module 620, the subcarrier that is used for assisting the set of lead code subcarrier carries out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming by the sub-piece of a plurality of basic sequences or form by the expansion of the sub-piece of a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information, and cell information and/or the sector auxiliary information obtained are exported to auxilliary preamble information access module 630;
Auxilliary lead code decoder module 620 carries out signal decoding, demodulation successively with the subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth, recovers 8 sub-pieces of basic sequence, and is combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the pairing sequence length of system bandwidth of minimum system bandwidth integral multiple, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L, and is combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the non-integral multiple pairing sequence length of system bandwidth of minimum system bandwidth, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
Auxilliary lead code decoder module 620 carries out signal decoding, demodulation successively with the subcarrier in the described auxilliary lead code subcarrier set of correspondence, obtain the sign of the sub-district in the corresponding auxilliary preamble sequence and/or the sign of sector, thereby obtain corresponding cell information and/or sector auxiliary information.
Auxilliary preamble information access module 630 is used to store the cell information and/or the sector ID information of input, and reads canned data when needed.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (14)
1. realize the synchronizing sequence sending method of access synchronously for one kind, comprising:
The base station is at the length of the different pairing auxilliary preamble sequences of system bandwidth, form auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or by the auxilliary preamble sequence of the sub-piece expansion of described a plurality of basic sequences acquisition, and be mapped to successively after described auxilliary preamble sequence modulated on the subcarrier in the auxilliary lead code subcarrier set, the number of described subcarrier equals the length of described auxilliary preamble sequence;
The base station sends main lead code that contains system bandwidth information and the one or more auxilliary lead code that contains sub-district and/or sector auxiliary information in superframe.
2. in accordance with the method for claim 1, it is characterized in that,, form auxilliary preamble sequence by the sub-piece of a plurality of basic sequences at the length of the different pairing auxilliary preamble sequences of system bandwidth, or, be meant by the auxilliary preamble sequence of the sub-piece expansion of described a plurality of basic sequences acquisition:
At minimum system bandwidth the shortest pairing sequence length, form auxilliary preamble sequence by N the sub-piece of basic sequence, described N is the integer greater than 1; Or at pairing greater than the described length of the auxilliary preamble sequence of short sequence length greater than minimum system bandwidth, carrying out part by the sub-piece of a described N basic sequence repeats or repeats fully, formation has the auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of N*L+M, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
3. in accordance with the method for claim 2, it is characterized in that described N is 8,
The base station is formed described auxilliary preamble sequence at the shortest sequence length of the pairing auxilliary lead code of minimum system bandwidth by 8 sub-pieces of basic sequence;
Perhaps, the base station is that the integral multiple of minimum system bandwidth is pairing greater than the described length of the auxilliary preamble sequence of short sequence length at described system bandwidth, described 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the described auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L;
Perhaps, the base station is the non-integral multiple pairing greater than the described length of the auxilliary preamble sequence of short sequence length of described minimum system bandwidth at described system bandwidth, described 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the described auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L+M.
4. in accordance with the method for claim 1, it is characterized in that,
The number of described auxilliary lead code subcarrier set is determined available subcarrier is divided into according to the frequency duplex factor as one of described auxilliary lead code in the base station, and in a plurality of auxilliary lead code subcarrier set is used in described sub-district and/or described sector; Modulate described auxilliary preamble sequence according to the sign of described sub-district and/or the sign of described sector the base station.
5. realize the synchronizing sequence method of reseptance of access synchronously for one kind, comprising:
Terminal detects the main lead code in the superframe that receives, and carries out Time and Frequency Synchronization, and obtains the system bandwidth information of carrying in the described main lead code; Length according to the pairing auxilliary preamble sequence of described system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming by the sub-piece of a plurality of basic sequences or form by the expansion of the sub-piece of described a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information.
6. according to the described method of reseptance of claim 5, it is characterized in that, length according to the pairing auxilliary preamble sequence of described system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover form by the sub-piece of a plurality of basic sequences or by the auxilliary preamble sequence that the expansion of the sub-piece of described a plurality of basic sequences is formed, be meant:
Subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth is carried out signal decoding, demodulation successively, recover by N the sub-piece of basic sequence, and be combined into complete auxilliary preamble sequence, described N is the integer greater than 1;
Perhaps, to carry out signal decoding, demodulation successively greater than the subcarrier in the auxilliary lead code subcarrier set of the shortest sequence length greater than minimum system bandwidth is pairing, recovering total number is the sub-piece of auxilliary preamble sequence of N*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
7. according to the described method of reseptance of claim 6, it is characterized in that described N is 8,
Terminal is carried out signal decoding, demodulation successively with the subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth, recovers 8 sub-pieces of basic sequence, and is combined into complete auxilliary preamble sequence;
Perhaps, terminal will be carried out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the pairing sequence length of system bandwidth of minimum system bandwidth integral multiple, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L, and is combined into complete auxilliary preamble sequence;
Perhaps, terminal will be carried out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the non-integral multiple pairing sequence length of system bandwidth of minimum system bandwidth, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L+M, and is combined into complete auxilliary preamble sequence.
8. in accordance with the method for claim 5, it is characterized in that,
Terminal is carried out signal decoding, demodulation successively with the subcarrier in the described auxilliary lead code subcarrier set of correspondence, obtain the sign of the described sub-district in the corresponding auxilliary preamble sequence and/or the sign of described sector, thereby obtain corresponding cell information and/or sector auxiliary information.
9. a synchronizing sequence dispensing device of realizing inserting synchronously comprises the main lead code sending module that connects successively, auxilliary lead code modulation mapping block and auxilliary lead code sending module; Wherein:
Described main lead code sending module is used for sending the main lead code that contains system bandwidth information at corresponding superframe, and described system bandwidth information is exported to auxilliary lead code modulation mapping block;
Described auxilliary lead code modulation mapping block, be used for length at the different pairing auxilliary preamble sequences of system bandwidth, form auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or be extended to auxilliary preamble sequence by the sub-piece of described a plurality of basic sequences, and be mapped to successively after described auxilliary preamble sequence modulated on the subcarrier in the auxilliary lead code subcarrier set, the number of described subcarrier equals the length of described auxilliary preamble sequence;
Described auxilliary lead code sending module, the one or more auxilliary preamble sequence that is used for will being mapped as subcarrier on corresponding superframe and character position sends.
10. according to the described dispensing device of claim 9, it is characterized in that,
Described auxilliary lead code modulation mapping block at the length of the different pairing auxilliary preamble sequences of system bandwidth, is formed auxilliary preamble sequence by the sub-piece of a plurality of basic sequences, or is extended to auxilliary preamble sequence by the sub-piece of described a plurality of basic sequences, is meant:
At the shortest sequence length of the pairing auxilliary lead code of minimum system bandwidth, form described auxilliary preamble sequence by 8 sub-pieces of basic sequence; Perhaps, at described system bandwidth is that the integral multiple of minimum system bandwidth is pairing greater than the described length of the auxilliary preamble sequence of short sequence length, described 8 sub-pieces of basic sequence are carried out part repeat or repeat fully, formation has the described auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L; Perhaps, at described system bandwidth is the non-integral multiple pairing greater than the described length of the auxilliary preamble sequence of short sequence length of described minimum system bandwidth, described 8 sub-pieces of basic sequence are carried out part to be repeated or repeats fully, formation has the described auxilliary preamble sequence that total number is the sub-piece of auxilliary preamble sequence of 8*L+M, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
11. according to the described dispensing device of claim 9, it is characterized in that,
Described auxilliary lead code modulation mapping block, frequency duplex factor as one according to described auxilliary lead code, determine available subcarrier is divided into the number of described auxilliary lead code subcarrier set, in a plurality of auxilliary lead code subcarrier set is used in described sub-district and/or described sector; According to the sign of described sub-district and/or the sign of described sector, described auxilliary preamble sequence is modulated.
12. a synchronizing sequence receiving system of realizing inserting synchronously comprises interconnective main preamble detection module and auxilliary lead code decoder module, wherein:
Described main preamble detection module is used for detecting the main lead code of the superframe of reception, carry out Time and Frequency Synchronization, and the system bandwidth information that will obtain from described main lead code is exported to described auxilliary lead code decoder module;
Described auxilliary lead code decoder module, be used for length according to the pairing auxilliary preamble sequence of described system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover the auxilliary preamble sequence of forming by the sub-piece of a plurality of basic sequences or form by the expansion of the sub-piece of described a plurality of basic sequences, and obtain wherein cell information and/or sector auxiliary information.
13. according to the described receiving system of claim 12, it is characterized in that,
Described auxilliary lead code decoder module, sequence length according to the pairing auxilliary lead code of described system bandwidth information, subcarrier in the auxilliary lead code subcarrier set is carried out signal decoding, demodulation successively, recover form by the sub-piece of a plurality of basic sequences or by the auxilliary preamble sequence that the expansion of the sub-piece of described a plurality of basic sequences is formed, be meant:
Subcarrier in the auxilliary lead code subcarrier set of the pairing the shortest sequence length of minimum system bandwidth is carried out signal decoding, demodulation successively, recover 8 sub-pieces of basic sequence, and be combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the pairing sequence length of system bandwidth of minimum system bandwidth integral multiple, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L, and is combined into complete auxilliary preamble sequence; Perhaps, to carry out signal decoding, demodulation successively for the subcarrier in the auxilliary lead code subcarrier set of the non-integral multiple pairing sequence length of system bandwidth of minimum system bandwidth, recovering total number is the sub-piece of auxilliary preamble sequence of 8*L+M, and be combined into complete auxilliary preamble sequence, wherein L is the natural number greater than 1, and M is more than or equal to 0 and less than the even number of N.
14. according to the described receiving system of claim 12, it is characterized in that,
Described auxilliary lead code decoder module, subcarrier in the described auxilliary lead code subcarrier set of correspondence is carried out signal decoding, demodulation successively, obtain the sign of the described sub-district in the corresponding auxilliary preamble sequence and/or the sign of described sector, thereby obtain corresponding cell information and/or sector auxiliary information.
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