Wireless communication method and device

Abstract

The present invention provides a wireless communication method, in which a short preamble synchronization sequence and a long preamble synchronization sequence are set in a physical frame, and the system capacity is increased by expanding the short preamble synchronization sequence or / and the long preamble synchronization sequence, including: setting the length of the sequence used by the short preamble synchronization sequence to be more than two; setting at least three subcarrier intervals, and the short preamble synchronization sequence supports the set subcarrier intervals; or / and setting the length of the sequence used by the long preamble synchronization sequence to be more than two; synchronizing the preamble repetition mode under different subcarrier intervals and bandwidths. The root sequence index, the common demodulation pilot signal CRS, and the phase offset and DPI of the demodulation pilot reference signal DRS used by the short preamble sequence are expanded to achieve the purpose of distinguishing cells. At the same time, different subcarrier intervals and bandwidth modes use different sequences, and multiple cells can also be distinguished. In this way, the network scale of the wireless communication system can be expanded.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communications, and in particular, relates to a wireless communication method and device. Background Art

[0002] With the rapid growth of user speed and business volume requirements, the bandwidth required by wireless communication systems continues to increase, and the demand for spectrum resources is rapidly increasing. However, wireless resources are limited, and expanding wireless communication frequency bands will also bring various challenges. With the rapid advancement of LTE commercialization internationally, 5G research has been launched. The IMT-2020 (5G) Promotion Group has released the "5G Vision and Requirements White Paper", which positions 5G as a wireless network with higher spectrum efficiency, faster speed and larger capacity. One of the key technologies to solve the shortage of wireless spectrum may be simultaneous full-duplex technology.

[0003] Co-time Co-frequency Full Duplex (CCFD) technology means that the transmitter and receiver of the device occupy the same frequency resources and work at the same time, so that both parties can use the same frequency at the same time in the uplink and downlink, breaking through the existing frequency division duplex (FDD) and time division duplex (TDD) modes, and is one of the keys for communication nodes to achieve two-way communication. Traditional duplex modes are mainly frequency division duplex and time division duplex, which are used to avoid the interference of transmitter signals on receiver signals in the frequency domain or time domain, while the emerging co-frequency simultaneous full duplex technology uses interference elimination methods to reduce the overhead of frequency or time slot resources in traditional duplex modes, thereby achieving the purpose of improving spectrum efficiency. Compared with the existing FDD or TDD duplex mode, CCFD technology can nearly double the efficiency of wireless resource utilization, thereby significantly improving system throughput and capacity, and thus becomes one of the potential key technologies for 5G.

[0004] Admittedly, the application of simultaneous co-frequency full-duplex technology still faces considerable challenges. With a simultaneous co-frequency full-duplex wireless system, all simultaneous co-frequency transmitting nodes are interference sources for non-target receiving nodes, and the transmission signals of simultaneous co-frequency transmitters will generate strong self-interference to local receivers. Therefore, the key to the application of simultaneous co-frequency full-duplex systems lies in the effective elimination of interference. In the study of self-interference elimination of simultaneous co-frequency full-duplex systems in point-to-point scenarios, there are three self-interference elimination technologies according to the different interference elimination methods and locations: antenna interference elimination, radio frequency interference elimination, and digital interference elimination. Although the interference situation in cellular systems will become more complex and changeable, the huge potential of simultaneous co-frequency full-duplex systems in point-to-point scenarios has attracted widespread attention and research in the industry. It is believed that through the improvement of theory and in-depth development of hardware, simultaneous co-frequency full-duplex technology will play an important role in the successful application of 5G.

[0005] In order to meet the needs of co-frequency networking, it is necessary to distinguish multiple cells under the co-frequency networking, so corresponding technical solutions are sought. Summary of the invention

[0006] In view of this, the technical problem to be solved by the present invention is to provide a technical solution to distinguish multiple cells in the same-frequency networking to meet the needs of the same-frequency networking.

[0007] The present invention provides a wireless communication method, in which a short preamble synchronization sequence and a long preamble synchronization sequence are set in a physical frame, and the system capacity is increased by extending the short preamble synchronization sequence and / or the long preamble synchronization sequence, including:

[0008] Setting the length N1 of the sequence used by the short preamble synchronization sequence to two or more types;

[0009] At least three subcarrier spacings are set, and the short preamble synchronization sequence supports the set subcarrier spacings; or / and

[0010] Setting the length N2 of the sequence used by the long preamble synchronization sequence to two or more types;

[0011] Synchronize preamble repetition patterns at different subcarrier spacing and bandwidth.

[0012] More preferably, the short preamble sequence is generated by a Zadoff-Chu sequence, and further comprises:

[0013] The number of root sequence indexes of the Zadoff-Chu sequence is increased so that the short preamble sequence supports at least three Zadoff-Chu sequences.

[0014] Preferably, the at least three subcarrier spacings include at least one of the following three types:

[0015] 78.125KHz, 19.53125KHz and 39.0625KHz.

[0016] More preferably, three preamble types, P1, P2, and P3, and synchronous preamble repetition modes under different subcarrier spacings and bandwidths are set.

[0017] The present invention also provides a wireless communication device, comprising:

[0018] A first setting unit is configured to set the length N1 of the sequence used by the short preamble synchronization sequence to two or more types;

[0019] A second setting unit is configured to set at least three subcarrier spacings, and the short preamble synchronization sequence supports the set subcarrier spacings; or / and

[0020] A third setting unit is configured to set the length N2 of the sequence used by the long preamble synchronization sequence to two or more types;

[0021] Synchronization unit, synchronizes preamble repetition patterns at different subcarrier spacing and bandwidth.

[0022] The present invention provides a wireless communication method, in which a short preamble synchronization sequence and a long preamble synchronization sequence are set in a physical frame, and the system capacity is increased by extending the short preamble synchronization sequence or / and the long preamble synchronization sequence, including: setting the length of the sequence used by the short preamble synchronization sequence to be more than two; setting at least three subcarrier intervals, and the short preamble synchronization sequence supports the set subcarrier intervals; or / and setting the length of the sequence used by the long preamble synchronization sequence to be more than two; synchronizing the preamble repetition mode under different subcarrier intervals and bandwidths. The root sequence index, the phase offset and DPI of the common demodulation pilot signal CRS and the demodulation pilot reference signal DRS used by the short preamble sequence are extended to support more cells. The short preamble sequence and the long preamble sequence achieve the purpose of distinguishing cells through different sequences and different phase offsets. At the same time, different subcarrier intervals and bandwidth modes use different sequences, and multiple cells can also be distinguished. In this way, the network scale of the wireless communication system can be expanded.

[0023] For the above and related purposes, one or more embodiments include features that will be described in detail below and particularly pointed out in the claims. The following description and the accompanying drawings describe certain exemplary aspects in detail, and are indicative of only some of the various ways in which the principles of the various embodiments may be employed. Other benefits and novel features will become apparent as the following detailed description is considered in conjunction with the accompanying drawings, and the disclosed embodiments are intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a physical frame structure in the prior art;

[0025] Figure 2 It is a schematic diagram of the time domain distribution of the physical layer synchronization preamble in the prior art;

[0026] Figure 3 is a schematic diagram of a typical same-frequency networking scenario in an embodiment of the present invention;

[0027] Figure 4 is a schematic block diagram of a receiver coarse synchronization detection in an embodiment of the present invention;

[0028] Figure 5 2 is a schematic diagram of the synchronous reception sliding correlation principle in an embodiment of the present invention;

[0029] Figure 6 A schematic block diagram of receiver precision synchronization detection in an embodiment of the present invention;

[0030] Figure 7 Block diagram of CRS channel estimation of a receiver in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following description and the accompanying drawings fully illustrate specific embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The examples represent possible changes only. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, these embodiments of the present invention may be represented individually or collectively by the term "invention", which is only for convenience, and if more than one invention is actually disclosed, it is not intended to automatically limit the scope of the application to any single invention or inventive concept.

[0032] Co-frequency networking means that all cells covered by the system network use the same frequency. Depending on the scenario, the rate of the edge cells is affected differently. Based on the actual situation, different frequency reuse methods can be used for the edge cells to meet the networking requirements.

[0033] In the context of scarce spectrum resources, co-frequency networking plays a vital role in the large-scale commercial use of system networks and is the key to improving spectrum efficiency.

[0034] In order to further strengthen the co-frequency networking function, some modifications and functional enhancements are made to the synchronization preamble and data demodulation reference signal functions of the existing technology. The goal is to be able to distinguish multiple physical cells in the co-frequency networking area and reduce interference between co-frequency cells.

[0035] A wireless communication method provided by an embodiment of the present invention includes a short preamble synchronization sequence and a long preamble synchronization sequence in a physical frame, and the short preamble synchronization sequence and / or the long preamble synchronization sequence are extended to increase system capacity, including:

[0036] Setting the length N1 of the sequence used by the short preamble synchronization sequence to two or more types;

[0037] At least three subcarrier spacings are set, and the short preamble synchronization sequence supports the set subcarrier spacings; or / and

[0038] Setting the length N2 of the sequence used by the long preamble synchronization sequence to two or more types;

[0039] Synchronize preamble repetition patterns at different subcarrier spacing and bandwidth.

[0040] In a specific embodiment, the short preamble sequence is generated by a Zadoff-Chu sequence, and further includes:

[0041] The number of root sequence indexes of the Zadoff-Chu sequence is increased so that the short preamble sequence supports at least two Zadoff-Chu sequences.

[0042] In a specific embodiment, the at least three subcarrier spacings include at least one of the following three types:

[0043] 78.125KHz, 19.53125KHz and 39.0625KHz.

[0044] In order to make the principles, characteristics and advantages of the present invention more clear, a detailed description is given below.

[0045] like Figure 1 As shown, the physical layer frame structure in the prior art, wherein the physical layer synchronization preamble includes a short preamble (S-Preamble) and a long preamble (L-Preamble, also: cell reference signal CRS), which are located at the beginning of each physical frame structure, occupying 1 OFDM symbol respectively, and mainly completing the frame detection triggering, AGC, frequency offset estimation, frame synchronization, channel estimation, etc. of the EUHT system.

[0046] The short preamble sequence S-Preamble is generated by the frequency domain ZC sequence. After conversion to the time domain, it is expressed as 9 repetition periods (CP+S1~S8) and is used for frame detection triggering, AGC, coarse frequency estimation and coarse time synchronization.

[0047] The long preamble sequence L-Preamble (CRS, Common reference signal) is generated by the frequency domain PN sequence. After conversion to the time domain, it is represented by two repetition periods (L1~L2) plus a cyclic prefix (CP, CyclicPrefix), which is used for precise time and frequency synchronization and channel estimation.

[0048] The physical layer synchronization preamble time domain distribution, such as Figure 2 shown.

[0049] Extension of short preamble sequence

[0050] The short preamble sequence is generated by the Zadoff-Chu sequence, and the generation method is as shown in Formula 1:

[0051]

[0052] Where, N: length of Zadoff-Chu sequence N, range see Table 2

[0053] r: the root sequence index corresponding to the Zadoff-Chu sequence, ranging from (1 to N-1)

[0054] The short preamble synchronization sequence generated by the above formula is mapped to N frequency domain subcarriers of a basic bandwidth. The mapping rule and the corresponding subcarrier set are as shown in Formula 2. It is then repeated to different subbands after multiplying the current system bandwidth by the rotation factor to support higher bandwidth.

[0055] {K n |K n =N e +8*m,m=0,1,2....N,K n ≠0}---(Formula 2)

[0056] In the technical solution provided by the present invention, the supported subcarrier spacing is also expanded, and support for two subcarrier spacings of 19.53125KHz and 39.0625KHz is added on the basis of the original 78.125KHz. Therefore, the short preamble sequence also needs to support the two newly added subcarrier spacings. Three different types are designed in the protocol corresponding to different subcarrier spacings: P1, P2 and P3 preamble types are shown in Table 1. According to the design requirements of the wireless communication system, the short preamble sequence must use the same subcarrier spacing as the system information channel and the transmission control channel.

[0057] Table 1. Synchronization preamble repetition patterns for different subcarrier spacing and bandwidths

[0058]

[0059]

[0060] Among them, N sd : Number of subcarriers, N rep : Number of repetitions

[0061] Different short preamble types are set according to different subcarrier spacing and bandwidth, such as types P1, P2, and P3 shown in Table 2. For different short preamble types P1 to P3, the length N of the Zadoff-Chu sequence used by the short preamble sequence is shown in Table 2, with two new lengths of 14 and 6. In order to enhance the same-frequency networking, the EUHT protocol supports 3 ZC sequences for different short preamble types. The corresponding root sequence index is shown in the following table r, and r corresponds to the short preamble ID in sequence. Specifically, in order to meet the networking requirements of different scenarios, EUHT supports more root sequence extensions.

[0062] For example, if a subcarrier spacing of 19.53kHz is used for the 5M basic bandwidth, the number of subcarriers is 224, which is type P1; if 39.06 / 78.125kHz is used, the number of carriers is 112 and 56 respectively, corresponding to types P2 and P3.

[0063] Table 2. Parameters of short preamble type

[0064]

[0065] Short preamble reception detection:

[0066] Since the ZC sequence has good correlation performance in both the frequency domain and the time domain, the terminal side generally uses the properties of the sequence itself and adopts a correlation method to receive and detect the synchronization sequence.

[0067] Depend on Figure 2 It can be seen that the short preamble sequence S-Preamble (STF) is represented by 9 repeated STFs in one OFDM symbol in the time domain, and each STF has the same ZC sequence properties. The EUHT system uses 9 repeated short preambles in the time domain to complete frame detection, AGC adjustment, coarse spectrum estimation, and coarse synchronization. Here we mainly focus on the coarse synchronization process. The designed solution can distinguish the S-Preamble sequences of multiple co-frequency cells, such as Figure 3 ID1 to ID3 in the typical same-frequency networking scenario shown, and the coarse synchronization information of a specified cell such as ID 1 can be obtained.

[0068] In the prior art, the synchronization algorithm uses the autocorrelation algorithm of the received signal. Although it can determine the rough synchronization position, it cannot distinguish the S-Preambles of multiple cells in the same-frequency networking scenario, nor can it ensure that the obtained synchronization position is the correct frame synchronization position point of a specific same-frequency cell. To this end, the new algorithm of the receiver uses the cross-correlation algorithm of the local sequence and the received signal. According to Table 2, the terminal receiver needs to maintain 3 local sequences. The new solution adopts Figure 4 The three parallel (or expanded to multiple according to product requirements) cross-correlation coarse synchronization detection modules shown in the figure support flexible configuration. In different networking scenarios and system processes, the coarse synchronization cross-correlation detection of specific IDs can be started separately, which can reduce the amount of calculation, speed up the synchronization speed, and reduce energy consumption.

[0069] 1. Clear networking scenario: If the current networking solution specifies that there are only two co-frequency cells, then there are only two S-Preamble IDs, such as ID 2 / 3. In this case, you only need to configure the coarse synchronization cross-correlation detection module to enable ID2 and ID3.

[0070] 2. In the uncertain initial network scanning stage, the system's inter-module interface register can be used to configure the frequencies to be scanned, the S-Preamble ID list, and the maximum number of subframes that can be detected for each S-Preamble ID. The enabled coarse synchronization cross-correlation detection modules are respectively detected for synchronization within a given time. The best S-Preamble ID and the corresponding synchronization position are determined by comparing the relevant decision vectors, and the synchronization information of other detected S-Preamble IDs is saved.

[0071] 3. Network connection state, that is, the current terminal has established a connection with a specific cell (such as ID1), and only needs to maintain synchronization with the ID1 cell, so only the coarse synchronization cross-correlation detection module of ID 1 needs to be turned on.

[0072] 4. Terminal movement or network switching status. If the next neighboring cell in the moving direction of the terminal STA is clear (such as ID2) for the cell where the current terminal STA is stationed (such as ID1), then the ID2 coarse synchronization cross-correlation detection module can be specified to be turned on. If the surrounding neighboring cells are uncertain, the coarse synchronization cross-correlation detection modules of ID1 to ID3 are turned on by default.

[0073] Since the energy of the received signal determines the strength of the correlation value, if the current STA working channel environment is relatively poor, the correlation peak may be submerged in the noise and the synchronization signal cannot be detected. Figure 2 As shown, the S-Preamble of the EUHT system is repeated 9 times in the time domain, so the sliding cross-correlation method between the local sequence and the received sequence is adopted in the time domain. Due to the good cross-correlation performance of the ZC sequence, after the correlation reception judgment, the cross-correlation peak of the received short preamble sequence that is the same as the local sequence can be better performed, and a greater probability can be detected among multiple received co-frequency short preamble sequences.

[0074] A typical short preamble synchronization sequence correlation reception detection process is as follows: Figure 5 As shown, the frame detection at the STA receiving end makes a correlation judgment on the received data in real time. After the judgment, the position for starting synchronization detection can be determined. The local sequence performs time domain sliding correlation on the synchronization data after the specified position. According to the properties of the ZC sequence, the cross-correlation value of the received data point that fully matches the local sequence will have a more obvious peak. Now, for the original autocorrelation scheme, the peak energy of the cross-correlation will be more obvious. In theory, multiple peaks will appear in the sliding direction of the cross-correlation, and the time domain positions corresponding to the peaks meet the equal interval. Based on the above properties, the coarse synchronization position of the S-Preamble ID cell finally selected can be confirmed.

[0075] Extension of long preamble synchronization sequence and sending of long preamble sequence:

[0076] Preamble (CRS) is a frequency domain PN sequence {Cn,·n=0,1,...,N-1} of length N. CRS is mapped to N frequency domain subcarriers on the basic bandwidth after BPSK modulation.

[0077] Since the frequency domain interval DPI of CRS is 2, two mapping schemes are extended here. The mapping rules and corresponding subcarrier sets are shown in Formula 3:

[0078] {K n |K n =N e +2*m, m=0, 1, 2...N, K n ≠0}

[0079] or

[0080] {K n |K n =N e +2*m+1,m=0,1,2...N-1,K n ≠0}---(Formula 3)

[0081] The CRS is then repeated on different subbands based on the current system bandwidth multiplied by the rotation factor to support higher bandwidth. Corresponding to the above two mapping schemes, two CRS sequences will be generated, and the CRS of the two cells can be distinguished through this round operation.

[0082] CRS and S-Preamble use the same subcarrier spacing, and CRS also has three types, P1, P2 and P3, according to Table 1. According to different configurations of the current system, CRS has the following parameter settings:

[0083] Table 3. Parameters of different L-Preamble (CRS) types

[0084]

[0085] After being mapped to different frequency domain subcarriers according to the above scheme, the long preamble sequence L-Preamble (CRS) from different central access points (CAP) is designed to increase the frequency domain offset as shown in Formula 4, so that four different cells can be distinguished:

[0086]

[0087] Among them, i: corresponds to different CAP

[0088]

[0089] Long preamble reception detection:

[0090] L-Spreamble (CRS) is mainly used for fine time and frequency synchronization and channel estimation.

[0091] Among them, the original fine time synchronization adopts the time domain autocorrelation scheme, which can only provide the fine synchronization position of the corresponding cell based on the coarse synchronization. Then L-Spreamble (CRS) performs channel estimation in the frequency domain for the demodulation of control information in the subsequent process. The original scheme is also unable to distinguish the channels H of multiple cells with the same frequency.

[0092] In order to enhance the same-frequency networking capability, after the previous short preamble rough synchronization, although different frame synchronization positions of at least three same-frequency cells can be obtained, it is hoped that the long preamble can be combined with the short preamble processing to further increase the ability to distinguish the same-frequency cells. Therefore, first in the fine synchronization processing stage, using several supported IDs (1), using the cross-correlation between the local sequence and the received data, different IDs (1) can be distinguished.

[0093] Figure 6 Receiver precision synchronization detection block diagram

[0094] Channel estimation, in order to distinguish different channels and correctly demodulate control information in the scenario of co-channel interference, the frequency domain offset added in the frequency domain by L-Spreamble (CRS) in Table 3 can at least distinguish the channels of ID (2) co-frequency cells.

[0095] Figure 7 Figure 2 is a block diagram of the receiver CRS channel estimation.

[0096] The demodulation reference signal DRS is mainly used for channel estimation and for demodulation of the TCH service channel.

[0097] The DRS frequency domain pilot interval DPI supports two configurations of 2 or 4, which is mainly used for channel estimation of different antennas. Therefore, in the scenario of single-stream transmission, this DPI frequency domain interval can be used to introduce 1 to 3 subcarrier offsets when the DRS sequence is generated and mapped. The effect of this operation is that n = 2 to 4 DRS sequences can be generated. However, we cannot get this capability in the scenario of multi-stream transmission.

[0098] To this end, the method of adding frequency domain offset to CRS is used to introduce the frequency domain offset shown in the following formula 5 into the original DRS sequence:

[0099]

[0100] Among them, i: corresponds to different CAP

[0101]

[0102] m: DRS sequence index (1 to 4)

[0103] In this way, the receiving end can distinguish the channels of up to 4 cells by simply adding different frequency domain offsets based on the original DRS sequence.

[0104] The present invention also provides a wireless communication device, comprising:

[0105] A first setting unit is configured to set the length N1 of the sequence used by the short preamble synchronization sequence to two or more types;

[0106] A second setting unit is configured to set at least two subcarrier spacings DPI, wherein the short preamble synchronization sequence supports the set subcarrier spacings DPI; or / and

[0107] A third setting unit is configured to set the length N2 of the sequence used by the long preamble synchronization sequence to two or more types;

[0108] Synchronization unit, synchronizes preamble repetition patterns at different subcarrier spacing and bandwidth.

[0109] The principle and processing flow of the wireless communication device are consistent with the wireless communication method provided by the present invention, and will not be described in detail here.

[0110] In summary, in the technical solution provided by the present invention, the root index (root index), the phase offset and DPI of the common demodulation pilot signal CRS and the demodulation pilot reference signal DRS used by the short preamble sequence are expanded to support more cells. And the standard adds short preamble and long preamble (P1 / P2 / P3) types for different subcarrier spacing and bandwidth modes.

[0111] Short preamble and long preamble use different sequences and different phase offsets to distinguish cells. Different cells transmit different sequences, and the receiver uses different local sequences for correlation, so that different cells with different sequences can be distinguished.

[0112] At the same time, different subcarrier spacing and bandwidth modes use different preamble sequences, which can also distinguish multiple cells, thus expanding the scale of the wireless communication system network.

[0113] It will be appreciated by those skilled in the art that the various exemplary method steps and device units described herein in conjunction with the disclosed embodiments can all be implemented in electronic hardware, software, or a combination of the two. In order to clearly illustrate the interchangeability between hardware and software, the various exemplary steps and units are generally described in the form of their functionality. Whether this functionality is implemented in hardware or software depends on the design constraints implemented by the specific application and the entire system. Those skilled in the art can implement the described functionality in a variety of ways for each specific application, but the results of this implementation should not be interpreted as departing from the scope of the present invention.

[0114] The steps of the method described in conjunction with the above disclosed embodiments may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. The software module may exist in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A typical storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. In an alternative embodiment, the storage medium is an integral part of the processor. The processor and the storage medium may exist in an ASIC. The ASIC may exist in a user station. In an alternative embodiment, the processor and the storage medium may exist as discrete components in a user station.

[0115] According to the disclosed embodiments, it is possible for those skilled in the art to implement or use the present invention. It is obvious to those skilled in the art that various modifications of these embodiments are possible, and the general principles defined herein can also be applied to other embodiments without departing from the scope and gist of the present invention. The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless communication method, wherein a short preamble synchronization sequence and a long preamble synchronization sequence are provided in a physical frame, characterized in that: The method of increasing system capacity by extending the short preamble synchronization sequence and / or the long preamble synchronization sequence includes: Setting the length N1 of the sequence used by the short preamble synchronization sequence to two or more types; At least three subcarrier spacings are set, and the short preamble synchronization sequence supports the set subcarrier spacings; or / and Setting the length N2 of the sequence used by the long preamble synchronization sequence to two or more types; Synchronize preamble repetition patterns at different subcarrier spacing and bandwidth; The at least three subcarrier spacings include at least one of the following three: 78.125KHz, 19.53125KHz and 39.0625KHz; The three preamble types P1, P2, and P3 and the synchronization preamble repetition mode under different subcarrier spacing and bandwidth are set as follows: Where: N sd : Number of subcarriers, N rep : number of repetitions.

2. The wireless communication method according to claim 1, wherein: The short preamble synchronization sequence is generated by a Zadoff-Chu sequence, further comprising: The number of root sequence indexes of the Zadoff-Chu sequence is increased so that the short preamble synchronization sequence supports at least three Zadoff-Chu sequences.

3. The wireless communication method according to claim 1, wherein: The parameters of the short leading type are as follows:

4. The wireless communication method according to claim 1, wherein: After the L-Preamble (CRS) from different CAPs is mapped to different frequency domain subcarriers, the CRS is offset in the frequency domain according to the offset calculated by the following formula: in:

5. The wireless communication method according to claim 1, wherein: Using the predetermined DPI frequency domain interval, 1 to 3 subcarrier offsets are introduced when the DRS sequence is generated and mapped, and the DRS sequence is offset in the frequency domain by the offset calculated according to the following formula: in:

6. The wireless communication method according to claim 1, wherein: The parameters of different L-Preamble (CRS) types are as follows:

7. A wireless communication device, wherein a short preamble synchronization sequence and a long preamble synchronization sequence are provided in a physical frame, characterized in that: The method of increasing system capacity by extending the short preamble synchronization sequence and / or the long preamble synchronization sequence includes: A first setting unit is configured to set the length N1 of the sequence used by the short preamble synchronization sequence to two or more types; A second setting unit is configured to set at least three subcarrier spacings, and the short preamble synchronization sequence supports the set subcarrier spacings; or / and A third setting unit is configured to set the length N2 of the sequence used by the long preamble synchronization sequence to two or more types; A synchronization unit that synchronizes preamble repetition patterns at different subcarrier spacings and bandwidths; The at least three subcarrier spacings include at least one of the following three: 78.125KHz, 19.53125KHz and 39.0625KHz; The three preamble types P1, P2, and P3 and the synchronization preamble repetition mode under different subcarrier spacing and bandwidth are set as follows: Where: N sd : Number of subcarriers, N rep : number of repetitions.

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