WO2017143880A1

WO2017143880A1 - Data transmission method and device

Info

Publication number: WO2017143880A1
Application number: PCT/CN2017/070887
Authority: WO
Inventors: 刘文豪; 郁光辉; 彭佛才; 王小鹏; 张淑娟
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-02-25
Filing date: 2017-01-11
Publication date: 2017-08-31
Also published as: CN107124383B; CN107124383A

Abstract

Disclosed are a data transmission method and device. The method comprises: obtaining a synchronization signal candidate set, wherein the candidate set comprises at least one synchronization signal; implementing downlink synchronization according to the candidate set; obtaining a system transmission mode parameter according to a detection result of the downlink synchronization; and performing downlink transmission or uplink transmission according to the system transmission mode parameter.

Description

Data transmission method and device

Technical field

This document relates to, but is not limited to, communication technology, and more particularly to a data transmission method and apparatus.

Background technique

In the future, wireless communication networks need to meet various access requirements, such as high bandwidth and large data volume, low latency, low cost, high reliability, high energy efficiency, etc., and these requirements sometimes have mutual constraints, and these requirements are It does not mean that it must be met in any scenario. For example, some services require high reliability but can tolerate certain delays, such as financial transactions. Some services require large amounts of data but loose requirements for real-time data. Such as FTP (File Transfer Protocol); some services require large amounts of data and require real-time, such as remote control, real-time 3D games.

In order to support large data volume transmission, the current wireless communication system adopts technologies such as high-order MIMO (Multiple-Input Multiple-Output) and HARQ (Hybrid Automatic Repeat Request) to improve the spectrum. Efficiency, increasing the capacity of a unit area through dense deployment. With such technologies, cells in the low frequency band are already close to the baseline of spectral efficiency, and it is difficult to meet the growing demand for wireless broadband capacity. In the next generation evolution process, the cell network needs to consider the spectrum of the high frequency band to improve the throughput of the wireless network, but the application mode of the high frequency band is also diverse. The spectrum allocation of the high frequency band has different control restrictions in different regions and different regions. The transmission characteristics of the frequency bands are also different. In addition, the application of high-band communication is limited to special communication fields such as military, but there is no relevant application for civil communication, and the communication methods and parameter configurations of high-band communication are still in their own camps and are not uniform. stage.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

For how to implement LTE (Long Term Evolution) and subsequent technologies In the evolution, communication is carried out using the entire available communication band including the high frequency band, and there is currently no related technical solution.

This embodiment provides a data transmission method and apparatus, which can effectively use the entire available frequency band including a high frequency band for communication in LTE and subsequent technology evolution.

In a first aspect, an embodiment of the present invention provides a data transmission method, where the method includes:

Acquiring a synchronization signal candidate set, wherein the candidate set includes at least one synchronization signal;

Performing downlink synchronization according to the candidate set;

Determining a parameter of a system transmission mode according to the detection result of the downlink synchronization;

Perform downlink transmission or uplink transmission according to parameters of the system transmission mode.

In an embodiment, at least one of the following distinguishing features exists between different synchronization signals in the candidate set: the sequence combination is different; the subcarrier spacing is different; the number of consecutive orthogonal frequency division multiplexing OFDM symbols is different; The sync bandwidth is not the same.

In an embodiment, the parameter of the system transmission mode includes at least one of the following:

System bandwidth; subcarrier spacing; physical broadcast channel PBCH configuration parameters; physical downlink control channel PDCCH configuration parameters; uplink access resource configuration parameters; synchronization channel bandwidth; pilot position; number of available subcarriers.

In an embodiment, different candidate sets correspond to different frequency bands, and the synchronization signals in the candidate set meet at least one of the following conditions:

The synchronization bandwidth of the synchronization signal in the candidate set is M*SYNCH_BW_basic, where SYNCH_BW_basic is the basic synchronization bandwidth, M>0, and the value of M is determined by detecting the synchronization signal;

The number of OFDM symbols occupied by the synchronization signal in the candidate set is n, and n is a natural number;

The subcarrier spacing corresponding to the synchronization signal in the candidate set is X*δf, where 1≤X≤M and X is an integer, and δf is a basic subcarrier spacing.

In an embodiment, the M corresponding to the first type of frequency band is an integer greater than or equal to 1, and the value of M corresponding to the second type of frequency band is a rational number less than or equal to 1.

In an embodiment, the first type of frequency band and the second type of frequency band are distinguished by 6 GHz. The starting frequency point of the first type of frequency band is greater than or equal to 6 GHz, and the ending frequency point of the second type of frequency band is less than 6 GHz.

In an embodiment, the frequency band f0: a frequency band less than 6 GHz, the corresponding value of M is 1/2 ^p , where the value of p is 0, 1, 2, 3, 4;

Band f1: [6 GHz, 20 GHz), the corresponding M value is 2 ^p , where p is 0, 1, 2, 3, 4, 5;

Frequency band f2: [20 GHz, 30 GHz), the corresponding M value is 2 ^p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

Frequency band f3: [30 GHz, 52.6 GHz), the corresponding M value is 2 ^p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

Band f4: [52.6 GHz, 76 GHz], the corresponding M value is 2 ^p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

In the frequency band f5: [80 GHz, 90 GHz], the corresponding M value is 2 ^p , where p is 0, 1, 2, 3, 4, 5, 6, 7, 8.

In one embodiment, the δf is 15 kHz; the SYNCH_BW_basic is 1.08 MHz; the n ≤16.

In an embodiment, the acquiring a synchronization signal candidate set includes:

Receiving signaling, the signaling being used to indicate the candidate set; or,

The synchronization signal is blindly detected from all of the synchronization signal candidate sets to determine the candidate set.

In an embodiment, the configuration parameter of the PBCH includes at least one of: a time domain location, a start location in the time domain location is in close proximity to a synchronization signal or a fixed time offset from a synchronization signal; a frequency domain location; The number of Orthogonal Frequency Division Multiplexing OFDM symbols.

In an embodiment, the determining, according to the detection result of the downlink synchronization, a parameter of a system transmission mode, including:

The number of OFDM symbols continued for the PBCH is determined by detecting the number of OFDM symbols that the synchronization signal continues and the ratioPBCH_SYNCH, which is the ratio between the number of OFDM symbols that the pre-agreed PBCH continues and the number of OFDM symbols that the synchronization signal continues.

In an embodiment, ratioPBCH_SCYCH ranges from [1/4, 4].

In an embodiment, when the parameter of the system transmission mode includes a system bandwidth, the method for acquiring the system bandwidth includes at least one of the following:

Determining the system bandwidth by detecting the synchronization signal of the center frequency point and the synchronization signal of the bandwidth edge;

The system bandwidth is determined according to the basic system bandwidth basicBW and M, wherein the basic system bandwidth basicBW ranges from [1.25MHz, 25MHz];

Knowing the system bandwidth through high layer signaling;

The system bandwidth is obtained by reading broadcast information transmitted on the PBCH.

In an embodiment, when the parameter of the system transmission mode includes the number of available subcarriers, the method for obtaining the number of available subcarriers includes at least one of the following:

The number of available subcarriers corresponding to the system bandwidth is determined to be basicSubCarr*M according to the basic subcarrier number basicSubCarr corresponding to the basic system bandwidth basicBW;

The number of available subcarriers is obtained by reading the broadcast information transmitted on the PBCH.

In an embodiment, when the parameters of the system transmission mode include the uplink access resource configuration parameter, the method for obtaining the uplink access resource configuration parameter includes:

And determining, according to the start symbol of the detected synchronization signal, an uplink access resource symbol start position.

In an embodiment, when the PDCCH configuration parameter is included in the parameter of the system transmission mode, determining the parameter of the system transmission mode according to the detection result of the downlink synchronization includes:

The location of the PDCCH is determined based on the start symbol and duration of the identified synchronization signal.

In an embodiment, the downlink transmission or the uplink transmission according to the parameter of the system transmission mode includes:

Obtaining uplink or downlink configuration parameters of the transmission frame through the PDCCH, and performing data transmission according to the configuration parameters of the uplink or downlink channel.

In an embodiment, the uplink access resource configuration parameter includes at least one of the following: a frequency domain location where the uplink access signal is located, and a number of OFDM symbols that the uplink access signal continues; correspondingly,

The method for obtaining the frequency domain location of the uplink access signal includes:

Determining a frequency domain location of the uplink access signal according to the detected frequency domain position of the synchronization signal;

The method for obtaining the number of OFDM symbols that the uplink access signal continues includes:

The number of OFDM symbols that the uplink access signal continues is determined according to the number of OFDM symbols that the detected synchronization signal continues.

Determining a frequency domain location of the uplink access signal according to a frequency domain location of the PBCH;

The number of OFDM symbols that the uplink access signal continues is determined according to the number of OFDM symbols that the PBCH continues.

In a second aspect, an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes:

An acquiring unit, configured to acquire a synchronization signal candidate set, where the candidate set includes at least one synchronization signal;

a synchronization unit, configured to complete downlink synchronization according to the candidate set;

a determining unit, configured to determine a parameter of a system transmission mode according to the detection result of the downlink synchronization;

The transmission unit is configured to perform downlink transmission or uplink transmission according to parameters of the system transmission mode.

The subcarrier spacing corresponding to the synchronization signal in the candidate set is X*δf, where 1≤X≤M and X is an integer, and δf is a basic subcarrier spacing;

In an embodiment, the first type of frequency band and the second type of frequency band are distinguished by 6 GHz, and the first frequency band has a starting frequency point greater than or equal to 6 GHz, and the second type of frequency band is terminated. The point is less than 6 GHz.

In an embodiment,

Frequency band f0: a frequency band less than 6 GHz, the corresponding M value is 1/2 ^p , where p is 0, 1, 2, 3, 4;

In an embodiment, the acquiring unit is configured to:

In an embodiment, the determining unit is configured to:

In an embodiment, ratioPBCH_SCYCH ranges from [1/4, 4].

In an embodiment, when the parameter of the system transmission mode includes a system bandwidth, the determining unit is configured to:

Determine system bandwidth by at least one of the following:

Knowing the system bandwidth through high layer signaling;

In an embodiment, when the parameter of the system transmission mode includes the number of available subcarriers, the determining unit is configured to:

The number of available subcarriers is determined by at least one of the following methods:

In an embodiment, when the parameter of the system transmission mode includes the uplink access resource configuration parameter, the determining unit is configured to:

In an embodiment, when the PDCCH configuration parameter is included in the parameter of the system transmission mode, the determining unit is configured to:

In an embodiment, the transmission unit is configured to:

In an embodiment, the uplink access resource configuration parameter includes at least one of the following: a frequency domain location where the uplink access signal is located, and a number of OFDM symbols that the uplink access signal continues; correspondingly, the determining unit is configured to:

In a third aspect, an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes:

processor;

a memory for storing processor executable instructions;

Wherein the processor executes instructions for:

Performing downlink synchronization according to the candidate set;

In an embodiment, ratioPBCH_SCYCH ranges from [1/4, 4].

Knowing the system bandwidth through high layer signaling;

In a fourth aspect, an embodiment of the present invention provides a terminal, where the terminal includes the data transmission apparatus according to any one of the second aspect or the third aspect or the second aspect or the third aspect.

According to a fifth aspect, an embodiment of the present invention provides a relay node, where the relay node includes the data transmission apparatus according to any one of the second aspect or the third aspect or the second aspect or the third aspect.

In a sixth aspect, an embodiment of the present invention provides a computer readable storage medium, where computer executable instructions are stored, and the computer executable instructions are implemented by a processor to implement the data transmission method.

A data transmission method and apparatus provided by an embodiment of the present invention, the method includes: acquiring a synchronization signal candidate set, where the candidate set includes at least one synchronization signal; performing downlink synchronization according to the candidate set; and performing downlink synchronization according to the downlink synchronization The detection result obtains the parameters of the system transmission mode; the downlink transmission or the uplink transmission is performed according to the parameters of the system transmission mode. In the technical solution of the embodiment of the present invention, the receiver detects the synchronization signal by acquiring the synchronization signal candidate set to complete the downlink synchronization, and acquires various parameters of the transmission mode used by the communication system according to the result of the synchronization detection, thereby using the corresponding transmission mode and parameters. Complete the data transfer. Compared with the disadvantages of the system transmission mode and the fact that the millimeter wave high frequency band communication is not supported, the embodiment of the present invention can support the communication method including the millimeter wave high frequency band communication mode and the existing multiple communication modes.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, which is used to explain the technical solutions of the present invention together with the embodiments of the present application, and does not constitute a limitation of the technical solutions of the present application.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present disclosure;

2 is a schematic diagram of a positional relationship between related channels and parameters involved in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The embodiment of the present invention provides a data transmission method. The receiver may be a user equipment such as a terminal or a relay node. As shown in FIG. 1 , the method includes:

Step 101: Acquire a synchronization signal candidate set, where the candidate set includes at least one synchronization signal;

Step 102: Complete downlink synchronization according to the candidate set.

Step 103: Determine parameters of a system transmission mode according to the detection result of the downlink synchronization.

Step 104: Perform downlink transmission or uplink transmission according to parameters of the system transmission mode.

Step 101 can include:

In an exemplary embodiment, at least one of the following distinguishing features exists between different synchronization signals in the candidate set: sequence combination is different; subcarrier spacing is different; continuous OFDM (Orthogonal Frequency Division Multiplexing) The number of symbols is different; the synchronization bandwidth is different.

In an exemplary embodiment, the parameter of the system transmission mode includes at least one of the following:

System bandwidth; subcarrier spacing; PBCH (Physical Broadcast Channel) configuration parameters; PDCCH (Physical Downlink Control Channel) configuration parameters; uplink access resource configuration parameters; synchronization channel bandwidth; pilot location; The number of available subcarriers.

Exemplarily, the PBCH, the PDCCH, the synchronization channel (Synch), and other related channels and parameters in the embodiment of the present invention, such as a PDSCH (Physical Downlink Shared Channel, The physical downlink shared channel), the PRACH (Physical Random Access Channel) PUCH (Physical Uplink Channel), and the GP (Guard Period) are shown in FIG. 2 .

In an exemplary embodiment, the configuration parameter of the PBCH includes at least one of: a time domain location, a start location in the time domain location is in close proximity to a synchronization signal or a fixed time offset from a synchronization signal; Position; the number of contiguous OFDM symbols.

In an exemplary embodiment, step 103 may include:

The number of OFDM symbols continued for the PBCH is determined by detecting the number of OFDM symbols that the synchronization signal continues and the ratioPBCH_SYNCH, which is the ratio between the number of OFDM symbols that the pre-agreed PBCH continues and the number of OFDM symbols that the synchronization signal continues. Exemplarily, ratioPBCH_SCYCH ranges from [1/4, 4].

In an exemplary embodiment, different candidate sets correspond to different frequency bands, and the synchronization signal in the candidate set meets at least one of the following conditions:

In an exemplary embodiment, the δf is 15 kHz; the SYNCH_BW_basic is 1.08 MHz; the n ≤16.

In an exemplary embodiment, the M corresponding to the first type of frequency band is an integer greater than or equal to 1, and the value of M corresponding to the second type of frequency band is a rational number less than or equal to 1.

In an exemplary embodiment, the first type of frequency band and the second type of frequency band are distinguished by 6 GHz, and the first frequency band has a starting frequency point greater than or equal to 6 GHz, and the second type of frequency band is The termination frequency is less than 6 GHz.

For example, it can be as follows:

In the frequency band f0: a frequency band less than 6 GHz, the corresponding M value is 1/2 ^p , where p is 0, 1, 2, 3, 4;

In an exemplary embodiment, when the parameter of the system transmission mode includes a system bandwidth, the method for acquiring the system bandwidth includes at least one of the following:

Knowing the system bandwidth through high layer signaling;

In an exemplary embodiment, when the parameter of the system transmission mode includes the number of available subcarriers, the method for obtaining the number of available subcarriers includes at least one of the following:

In an exemplary embodiment, when the parameters of the system transmission mode include the uplink access resource configuration parameter, the method for obtaining the uplink access resource configuration parameter includes:

In an exemplary embodiment, the PDCCH configuration parameter is included in the parameters of the system transmission mode. And determining the parameters of the system transmission mode according to the detection result of the downlink synchronization, including:

Step 104 can include:

In an exemplary embodiment, the uplink access resource configuration parameter includes at least one of: a frequency domain location where the uplink access signal is located, and an OFDM symbol number of the uplink access signal duration; correspondingly,

The method for data transmission according to the embodiment of the present invention, the synchronization signal candidate set is obtained, wherein the candidate set includes at least one synchronization signal; the downlink synchronization is completed according to the candidate set; and the system transmission mode is determined according to the detection result of the downlink synchronization. The parameters are downlink or uplink according to the parameters of the system transmission mode. In the technical solution of the embodiment of the present invention, the receiver detects the synchronization signal by acquiring the synchronization signal candidate set to complete the downlink synchronization, and acquires various parameters of the transmission mode used by the communication system according to the result of the synchronization detection, thereby using the corresponding transmission mode and parameters. Complete the data transfer. Compared with the disadvantages of the system transmission mode and the support of the millimeter wave high frequency band communication, the embodiment of the present invention can support the communication method including the millimeter wave high frequency band and the existing multiple communication parties. Communication.

In order to enable those skilled in the art to more clearly understand the technical solutions provided by the present application, the technical solutions provided by the present application are described below:

The receiver acquires the synchronization signal candidate set, and detects the synchronization signal according to the synchronization signal candidate set to complete the downlink synchronization. By detecting the frequency domain position of the synchronization signal, the system bandwidth, the system sampling rate, and the FFT (Fast Fourier Transformation) point can be determined. Parameters such as uplink/downlink configuration, PBCH, PDCCH, and uplink and downlink channel configuration.

The receiver successfully detects the synchronization candidate set, first determines the system sampling rate, and can detect the center frequency of the system bandwidth and the synchronization signal of the bandwidth edge to determine the system bandwidth. There are many methods, for example, a sequence corresponding to the synchronization signal of the bandwidth center frequency point can be detected. (hereinafter referred to as the synchronization sequence) initially determines whether there is a synchronization signal at the edge of the bandwidth to determine the system bandwidth; or the system bandwidth can be determined by detecting the number of OFDM symbols and/or the synchronization sequence that the synchronization signal continues, as exemplified as follows: Assume the synchronization sequence A corresponds to indicate that the system bandwidth is BW_A, and sequence B corresponds to the system bandwidth BW_B; or that the number of OFDM symbols for which the synchronization signal continues is a corresponding to indicate that the system bandwidth is BW_a, and that the number of consecutive OFDM symbols is b indicates that the system bandwidth is BW_b; or synchronization The sequence and the number of OFDM symbols that the sync signal continues to combine are mapped to the system bandwidth so that the system bandwidth can be determined by determining the aforementioned combination.

The system bandwidth can also be obtained through PBCH notification. The location of the PBCH is defined by the synchronization signal. The number of OFDM symbols that the PBCH continues can also be implicitly mapped by the number of OFDM symbols that the synchronization signal continues. For example, there may be a fixed proportional relationship, and the foregoing mapping or proportional relationship may have an agreed relationship with the actual frequency band.

The mapping relationship between the synchronization signal and the PBCH may be that the receiver attempts to demodulate the PBCH on one or more OFDM symbols immediately following the synchronization signal in a predetermined manner, and determines the PBCH duration by a CRC (Cyclic Redundancy Check). The number of OFDM symbols.

In order to reduce the complexity of acquiring the PBCH, the PBCH of the corresponding symbol number may be demodulated according to the proportional relationship between the number of OFDM symbols that the agreed synchronization signal continues and the number of OFDM symbols continued for the PBCH, and the resource position of the PBCH is determined according to the CRC check result, and further Extract PBCH.

The receiver determines the FFT point number and the subcarrier spacing according to the synchronization signal candidate set, thereby determining The sample rate, and the determination of the synchronization signal candidate set may occur in the handover phase, and the receiver may be signaled by the current serving cell.

The acquisition of the synchronization signal candidate set may also occur at the moment when the receiver is initially powered on. At this time, the receiver determines the synchronization signal candidate set according to the local database, and the receiver preferentially performs the synchronization signal identification in the database stored in the local database.

In the initial startup phase, the receiver does not have any a priori information, at which point the receiver exhausts all of the synchronization signals of the candidate set to determine the system transmission mode. In order to reduce the complexity of the receiver, only the corresponding candidate set can be detected at the frequency point according to the agreed manner. For example, the sampling rate corresponding to the frequency point f1 is N1*fs_basic, where N1 is the candidate sampling rate scaling factor corresponding to the frequency point f1. , fs_basic is the base sampling frequency corresponding to the frequency point f1.

In order to further simplify the detection, the receiver performs the detection of the synchronization signal according to the basic sampling rate fs_const of all the frequency points, and the basic sampling rate of all the frequency points is constant, and only the candidate expansion factor Nx of the corresponding frequency point fx is traversed.

The OFDM-based communication system has a sampling frequency fs = FFTsize * δf, where FFTsize is the number of FFT points for OFDM modulation and δf is the subcarrier spacing. In order to simplify the complexity of the receiver, it may be agreed that N1 times the subcarrier spacing is a candidate subcarrier spacing, that is, the fixed FFTsize determines the system sampling frequency by attempting the subcarrier spacing.

For the OFDM communication system, FFTsize and δf are determined, that is, the OFDM symbol in which the synchronization signal is detected by correlating the data at the sampling rate of fs.

The receiver determines the location of the uplink access signal according to the detected position of the downlink synchronization signal, for example, the receiver according to the resource location subframe of the downlink access signal or the starting position of the frame, and then according to the agreed relationship (for example, may be a fixed bias) Shift value) determines the starting position of the uplink access signal.

The receiver determines the duration of the downlink access signal according to the detected downlink synchronization signal. For example, the duration of the downlink synchronization is T1, and the duration of the uplink access is T1*Tcomp, where Tcomp is the link compensation of the uplink transmission, and Tcomp The value is selected according to the deployment environment. When the deployment environment is a small coverage area, Tcomp ≤ 1, and when the deployment environment is a large coverage area, Tcomp ≥ 1.

Example 1:

The receiver accesses the macro cell, and the receiver obtains the synchronization signal candidate set of the high frequency station to be accessed through the high layer signaling of the macro cell, and the receiver obtains the synchronization signal candidate set corresponding to the plurality of frequency bands. The receiver performs synchronous detection on the synchronization signal candidate set of the corresponding frequency band, and completes the center frequency point, the synchronization signal bandwidth, the scaling factor M (for the convenience description, the M is called the expansion factor), the subcarrier spacing, and the synchronization signal are continued. Identification of the number of OFDM symbols. Based on this information, the receiver can further determine other aspects of the system transmission mode, as embodied in the various sub-embodiments.

Sub-example 1:

The receiver obtains the synchronization signal candidate set of the corresponding frequency band by using the high-level signaling of the macro cell, and the receiver also acquires the number of OFDM symbols and the candidate value of the expansion factor M for synchronizing the synchronization signal of the target cell by using the signaling. The receiver detects the synchronization signal according to the agreed basic subcarrier spacing of 15 kHz and the scaling factor M in the candidate set. After the downlink synchronization is completed, the receiver can obtain the scaling factor M, the synchronization signal bandwidth, and the number of OFDM symbols that the synchronization signal continues.

The synchronization signal candidate set is shown in the following table:

The receiver recognizes that the maximum correlation peak appears in the frequency band of 20 GHz by synchronous detection and detects that the scaling factor M is 16. The receiver may filter data outside the candidate frequency band, and the filtered time domain data is correlated with a known local sequence, and the candidate bandwidth that determines the maximum peak of the synchronization bandwidth by comparing the correlation peaks is the actual synchronization bandwidth. The corresponding M is the detected scaling factor.

The receiver can determine the subcarrier spacing of the transmission system to be 15*16 kHz according to the scaling factor M of 16. The terminal determines the system bandwidth to be 20*16=320 MHz according to the agreed base bandwidth of 20 MHz and the scaling factor of 16.

Sub-example 2:

The receiver obtains the synchronization signal candidate set of the corresponding frequency band through the high layer signaling of the macro cell, and receives the The high-speed signaling also acquires the number of OFDM symbols for synchronizing the synchronization signal of the target cell, the candidate value of the scaling factor M, and the location where the synchronization signal may appear. The receiver detects the synchronization signal according to the agreed basic subcarrier spacing of 15 kHz and the scaling factor M in the candidate set. After the downlink synchronization is completed, the receiver can obtain the scaling factor M, the synchronization signal bandwidth, and the number of OFDM symbols that the synchronization signal continues.

The synchronization signal candidate set is shown in the following table:

The synchronization signal of the non-central carrier frequency may be position indication information N ₁ :

带宽MHzBandwidth MHz	N₁ N ₁
100100	2525
200200	5050
400400	100100
800800	200200

The receiver identifies the scaling factor M according to the synchronization with the center frequency point, and the receiver determines the possible position of the synchronization signal of the non-central carrier frequency position according to the scaling factor M obtained in the signaling: f _center ±N ₁ *M*1.08MHz

The receiver recognizes that the maximum correlation peak appears in the frequency band of 20 GHz by synchronous detection and detects the scaling factor M=16.

The receiver first detects the center frequency point 20 GHz offset according to the scaling factor M=16. The synchronization signal is not detected at the position of ±25*16*1.08 MHz, and the synchronization is detected at this position with the center frequency offset of ±50*16*1.08 MHz. The signal determines that the system bandwidth is 200 MHz according to the relationship between the bandwidth and the value of N1.

The receiver receives the information carried in the PDCCH over the entire bandwidth, and the content of each field of the PDCCH Can be as follows:

The PDCCH includes configuration information of an uplink access, a public notification message, and scheduling information of an uplink data transmission. The synchronization signal and the control signal have a predetermined timing relationship. The receiver determines the location of the PDCCH by using the positioning synchronization signal. The receiver first performs uplink access according to the parameters of the acquired uplink access resource configuration, and detects the control message at a later time to determine. Whether there is downlink data arrival and uplink data grant scheduling information for corresponding downlink reception and uplink data transmission. After the receiver sends the uplink access signal, a time window is opened, and the PDCCH is detected in the time window. The PDCCH includes a response of the uplink access signal, and the uplink access response includes the allocation of the uplink resource. The timing relationship between the uplink access response of the base station and the uplink access signal sent by the receiver is not strictly determined in a certain subframe, so the receiver detects the uplink access response information in an access response time window, if The access response includes an access signal of the receiver, and the access response message is scrambled with a specific ID of the receiver (eg, a cell radio network identifier C-RNTI that can be allocated for the terminal), and the receiver uses a specific The ID is descrambled. If the CRC check passes, the access response information is considered to be sent by the receiver.

Sub-embodiment 3

The receiver obtains the synchronization signal candidate set of the corresponding frequency band through the high-level signaling of the macro cell, and the receiver also acquires the number of OFDM symbols for the synchronization signal for the synchronization target cell, the candidate value of the scaling factor M, and the synchronization through the high-layer signaling. The location where the signal may appear. The receiver detects the synchronization signal according to the agreed basic subcarrier spacing of 15 kHz and the scaling factor M in the candidate set. After the downlink synchronization is completed, the receiver can obtain the scaling factor M, the synchronization signal bandwidth, and the number of OFDM symbols that the synchronization signal continues.

The synchronization signal candidate set is shown in the following table:

The receiver determines the system bandwidth according to the possible sequence combination of the synchronization signals, and identifies the number n of OFDM symbols that the synchronization signal continues in the synchronization process, and the receiver determines the bandwidth according to the sequence combination of the synchronization signals. As shown in the following table:

The receiver recognizes that the maximum correlation peak appears in the 30 GHz band by synchronous detection and detects the scaling factor M=16. The receiver keeps the number of symbols according to the detected synchronization signal n=4, and the receiver detects that the sequence combination is 5, 6, 7, 8 and the receiver finally confirms that the system bandwidth is M*20=16*20=320 ( MHz).

The combination of the scaling factor and the frequency band in the above embodiment and the combination of the number of consecutive symbols and the sequence of different synchronization signals are merely illustrative of the implementation of the transmission mode by the embodiment of the present invention. These combinations are not specifically limited.

Example 2:

The receiver is connected to the high frequency coverage area, and the receiver detects all the synchronization signal candidate sets of the high frequency station (ie, the blind detection synchronization signal) according to the convention. The receiver selects different synchronization signal candidate sets at different frequency points for synchronization detection according to the agreement, and the synchronization detection process completes the center frequency point and the synchronization signal band. The width, the scaling factor M, the subcarrier spacing, and the identification of the number of OFDM symbols that the synchronization signal continues. The receiver can further determine the configuration of other channels and signals based on this information, and the actual process is embodied in various sub-embodiments.

Sub-example 1:

The receiver performs synchronous detection according to the synchronization signal candidate set corresponding to different frequency bands, and the synchronization signal candidate set corresponding to the agreed frequency band is distinguished from the following aspects: the number of OFDM symbols continued by different synchronization signals, and the values of different scaling factors M, The value of the different base subcarrier spacing δf, the value of the different base synchronization bandwidth SYNCH_BW_basic.

The receiver detects the synchronization signal according to the agreed basic subcarrier spacing δf and the scaling factor M of the synchronization signal candidate set. After the downlink synchronization is completed, the receiver can obtain the center frequency of the synchronization signal, the scaling factor M, the synchronization signal bandwidth, and the synchronization signal duration. The number of OFDM symbols.

The synchronization signal candidate set is shown in the following table:

The receiver recognizes that the maximum correlation peak appears in the frequency band of 20 GHz by synchronous detection and detects that the scaling factor M is 16. The receiver further determines the number of OFDM symbols that the PBCH continues according to the number of OFDM symbols that the synchronization signal continues, and the receiver determines the location of the time-frequency resource where the PBCH is located according to the timing relationship between the synchronization signal and the PBCH convention. The receiver extracts system messages by reading broadcast messages. Parameters such as system bandwidth and uplink access resource configuration are read by the PBCH receiver.

The receiver sends an uplink access signal on the designated resource according to the content acquired by the PBCH.

The receiver receives the system broadcast message to confirm the correspondence between the uplink access signal and the access response resource, and the receiver detects the uplink access response message on the detection window according to the correspondence.

The receiver blindly detects the uplink access response message over the entire bandwidth.

The receiver determines, according to the access response message, the subsequent uplink transmission resource for subsequent uplink data transmission and downlink data reception.

Sub-example 2:

The synchronization signal candidate set is shown in the following table:

The receiver detects by synchronization detection that the maximum correlation peak appears in the frequency band of 80 GHz and detects that the scaling factor M is 64. The receiver further determines the number of OFDM symbols that the PBCH continues according to the number of OFDM symbols that the synchronization signal continues, and the receiver determines the location of the time-frequency resource where the PBCH is located according to the timing relationship between the synchronization signal and the PBCH convention. The receiver extracts system messages by reading broadcast messages. Parameters such as system bandwidth and uplink access resource configuration are read by the PBCH receiver.

The receiver receives the PDCCH in the uplink access signal corresponding to the frequency domain resource.

The receiver reads the access response message in the PDCCH to determine the number of uplinks performed by the uplink sending resource. According to the transmission and downlink data reception.

The receiver access resource frequency domain resource location and the control channel frequency domain resource location of the bearer access response in the foregoing embodiment are only one way to identify the UE specific control channel by using the uplink access resource in the embodiment of the present invention. This type of correspondence is not unique and does not specifically limit these combinations. Other methods include that the control channel carrying the access response resource establishes a relationship with the cell ID, for example, frr=(frach+bwrach*cellID) mod BW, that is, frar The frequency domain location of the RAR is carried, the frach indicates the frequency domain location of the uplink access signal, bwrach indicates the random access bandwidth, indicating that the cell ID cell IDBW indicates the bandwidth, and mod indicates the modulo operation.

Sub-example 3:

The receiver performs synchronous detection according to the set of synchronization signals agreed by different frequency bands, and the synchronization signal candidate set corresponding to the agreed frequency band is distinguished from the following aspects: the number of OFDM symbols continued by different synchronization signals, and the values of different scaling factors M are different. The value of the base subcarrier spacing δf, the value of the different base synchronization bandwidth SYNCH_BW_basic.

The synchronization signal candidate set is shown in the following table:

The receiver detects by synchronization detection that the maximum correlation peak appears in the frequency band of 10 GHz and detects a scaling factor of 16. The receiver then determines the number of OFDM symbols that the PBCH continues to be nSymbPBCH=4 according to the synchronization signal duration number of symbols n=4 and ratioPBCH_SYNCH=1. Can Therefore, the receiver also performs an attempt to synchronize the number of OFDM symbols for the synchronization signal in addition to the attempt to synchronize the bandwidth and the sequence, in which the receiver separately correlates the data of the bandwidth of the synchronization signal of each OFDM symbol with the local sequence. The correlation value corresponding to each OFDM symbol is accumulated. When the correlation value accumulates and contributes to the signal, it is considered that an OFDM symbol carries a synchronization signal. If the accumulated correlation peak contribution is small, it is considered as noise, and it is determined that the OFDM symbol does not carry a synchronization signal. . By synchronizing the correlation peaks of different OFDM symbols to know which OFDM symbol accumulated values contribute to the correlation peak, the number of OFDM symbols occupied by the synchronization signal, that is, the number of OFDM symbols that the synchronization signal continues, can be determined.

The receiver determines the location of the time-frequency resource where the PBCH is located according to the timing relationship between the synchronization signal and the PBCH convention. The receiver extracts system messages by reading broadcast messages. The subsequent processes of reading system information through the PBCH receiver refer to the sub-embodiments 1 and 2 of the present embodiment.

Sub-embodiment 4:

The receiver performs synchronous detection according to the synchronization signal candidate set corresponding to different frequency bands, and the synchronization signal candidate set corresponding to the agreed frequency band is distinguished from the following aspects: the number of OFDM symbols continued by different synchronization signals, and the values of different scaling factors M, The value of the different base subcarrier spacing δf, the value of the different base synchronization bandwidth SYNCH_BW_basic

The receiver detects by synchronization detection that the maximum correlation peak appears in the frequency band of 10 GHz and detects a scaling factor of 16. The receiver then determines the number of OFDM symbols that the PBCH continues to be nSymbPBCH=4 according to the synchronization signal duration number of symbols n=4 and ratioPBCH_SYNCH=1.

The receiver determines the location of the time-frequency resource where the PBCH is located according to the timing relationship between the synchronization signal and the PBCH convention. The receiver extracts system messages by reading broadcast messages. The PBCH receiver reads configuration information such as system bandwidth, uplink access resource configuration, and number of available subcarriers.

The receiver reads the access response message in the PDCCH and determines the uplink sending resource to perform uplink data transmission and downlink data reception according to the number of available subcarriers.

Example 3:

The receiver blindly detects the synchronization signal from all the synchronization signal candidate sets, identifies the cell according to the synchronization signal, and locates the duration of the uplink access according to the synchronization signal.

Sub-example 1:

The receiver performs synchronous detection according to the synchronization signal candidate set agreed by different frequency bands, and the synchronization signal candidate set corresponding to the agreed frequency band is distinguished from the following aspects: the number of OFDM symbols continued by different synchronization signals, and the values of different scaling factors M, The value of the different base subcarrier spacing δf, the value of the different base synchronization bandwidth SYNCH_BW_basic.

The receiver detects the synchronization signal according to the agreed basic subcarrier spacing δf and the scaling factor M of the synchronization signal candidate set. After the downlink synchronization is completed, the receiver can obtain the center frequency of the synchronization signal, the scaling factor M, the synchronization signal bandwidth, and the synchronization signal duration. The number of symbols of OFDM.

The receiver detects by synchronization detection that the maximum correlation peak appears in the frequency band of 10 GHz and detects that the scaling factor M is 16. The receiver then determines the number of OFDM symbols that the PBCH continues to be nSymbPBCH=4 according to the synchronization signal duration number of symbols n=4 and ratioPBCH_SYNCH=1.

The receiver determines, according to the number of OFDM symbols that the PBCH is detected, that the number of symbols that the receiver transmits the uplink access channel continues to be nSymbPreamble=4; the receiver repeats the same access sequence on four symbols. Commonly used sequences are ZC sequences or pseudo-random sequences.

Sub-example 2:

The receiver determines the location of the time-frequency resource where the broadcast channel PBCH is located according to the timing relationship between the synchronization signal and the PBCH convention. The receiver extracts system messages by reading broadcast messages. The PBCH receiver reads configuration information such as system bandwidth, uplink access resource configuration, and number of available subcarriers.

The receiver determines, according to the number of OFDM symbols detected by the BCH, that the number of symbols that the receiver transmits the uplink access channel continues to be nSymbPreamble=4; the receiver repeats the same access sequence on four symbols. Commonly used sequences are ZC sequences or pseudo-random sequences.

In summary, the method, the device, or the system, in the embodiment of the present invention, the terminal is based on different time domain resource sets and/or frequency domain resource sets by pre-defining or receiving broadcast messages and/or higher layer signaling. Different and/or uplink access signal sequences are different to cover the uplink receive beam group. The base station selects a time domain resource set and/or a frequency domain resource set and/or a sequence used by the uplink access signal to obtain an uplink access signal sent by the receiver, and sends an uplink access response after successfully receiving the uplink access signal. Message. The uplink access response message may carry the uplink access signal quality indicator bit and the uplink access quality. In this way, the terminal can obtain the uplink transmit beam or the optimal uplink transmit beam that satisfies the uplink transmission, and the base station can select the uplink received beam or the optimal uplink receive beam to ensure reliable transmission of subsequent information.

The embodiment of the present invention provides a data transmission device 10, as shown in FIG. 3, including:

The obtaining unit 11 is configured to acquire a synchronization signal candidate set, where the candidate set includes at least one synchronization signal;

The synchronization unit 12 is configured to complete downlink synchronization according to the candidate set;

The determining unit 13 is configured to determine a parameter of the system transmission mode according to the detection result of the downlink synchronization;

The transmission unit 14 is configured to perform downlink transmission or uplink transmission according to parameters of the system transmission mode.

There are at least one of the following distinguishing features between different synchronization signals in the candidate set: the sequence combinations are different; the subcarrier spacing is different; the number of consecutive orthogonal frequency division multiplexing OFDM symbols is different; the synchronization bandwidth is different.

The parameters of the system transmission mode include at least one of the following:

Different candidate sets correspond to different frequency bands, and the synchronization signals in the candidate set meet at least one of the following conditions:

The synchronization bandwidth of the synchronization signal in the candidate set is M*SYNCH_BW_basic, where SYNCH_BW_basic is the basic synchronization bandwidth, M>0, and the value of M is detected by synchronization. Signal determined;

In an exemplary embodiment,

In an exemplary embodiment, the obtaining unit 11 is configured to:

In an exemplary embodiment, the determining unit 13 is configured to:

The number of OFDM symbols continued for the PBCH is determined by detecting the number of OFDM symbols that the synchronization signal continues and the ratioPBCH_SYNCH, which is the ratio between the number of OFDM symbols that the pre-agreed PBCH continues and the number of OFDM symbols that the synchronization signal continues. The ratio of PBCH_SCYCH is [1/4, 4].

In an exemplary embodiment, when the parameter of the system transmission mode includes a system bandwidth, the determining unit is configured to:

Determine system bandwidth by at least one of the following:

Knowing the system bandwidth through high layer signaling;

In an exemplary embodiment, when the parameter of the system transmission mode includes the number of available subcarriers, the determining unit is configured to:

In an exemplary embodiment, when the parameter of the system transmission mode includes an uplink access resource configuration parameter, the determining unit is configured to:

In an exemplary embodiment, when the PDCCH configuration parameter is included in a parameter of the system transmission mode, the determining unit is configured to:

In an exemplary embodiment, the transmission unit 14 is configured to:

In an exemplary implementation, the uplink access resource configuration parameter includes at least one of the following: a frequency domain location where the uplink access signal is located, and a number of OFDM symbols that the uplink access signal continues; correspondingly, the determining unit is configured to:

This embodiment is used to implement the foregoing method embodiments. For the working process and working principle of each unit in this embodiment, refer to the description in the foregoing method embodiments, and details are not described herein again.

The data transmission apparatus provided by the embodiment of the present invention acquires a synchronization signal candidate set, where the candidate set includes at least one synchronization signal, completes downlink synchronization according to the candidate set, and acquires a system transmission mode according to the detection result of the downlink synchronization. Parameter; performing downlink transmission or uplink transmission according to parameters of the system transmission mode. In the technical solution of the embodiment of the present invention, the receiver detects the synchronization signal by acquiring the synchronization signal candidate set to complete the downlink synchronization, and acquires various parameters of the transmission mode used by the communication system according to the result of the synchronization detection, thereby using the corresponding transmission mode and parameters. Complete the data transfer. Compared with the disadvantages of the system transmission mode and the fact that the millimeter wave high frequency band communication is not supported, the embodiment of the present invention can support the communication method including the millimeter wave high frequency band communication mode and the existing multiple communication modes.

An embodiment of the present invention provides a terminal, including the foregoing data transmission device 10.

An embodiment of the present invention provides a relay node, including the foregoing data transmission device 10.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the data transfer method described above.

The computer readable storage medium is also arranged to store program code for performing the steps of any of the method embodiments described above.

In this embodiment, the computer readable storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic disk. Or a variety of media such as optical discs that can store program code.

In the present embodiment, the processor executes the method steps of the above embodiments in accordance with program code stored in a computer readable storage medium.

For the examples in this embodiment, reference may be made to the examples described in the foregoing method embodiments and the embodiments, and details are not described herein again.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present invention and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

In the technical solution of the embodiment of the present invention, the receiver detects the synchronization signal by acquiring the synchronization signal candidate set to complete the downlink synchronization, and acquires various parameters of the transmission mode used by the communication system according to the result of the synchronization detection, thereby using the corresponding transmission mode and parameters. Complete the data transfer. Embodiments of the present invention can support communication including a millimeter wave high frequency band communication method and an existing plurality of communication methods.

Claims

A data transmission method includes:

Acquiring a synchronization signal candidate set, wherein the candidate set includes at least one synchronization signal;

Performing downlink synchronization according to the candidate set;

Determining a parameter of a system transmission mode according to the detection result of the downlink synchronization;

Perform downlink transmission or uplink transmission according to parameters of the system transmission mode.
The method according to claim 1, wherein at least one of the following distinguishing features exists between different synchronization signals in the candidate set: sequence combination is different; subcarrier spacing is different; continuous orthogonal frequency division multiplexing OFDM The number of symbols is different; the synchronization bandwidth is not the same.
The method of claim 1 wherein the parameters of the system transmission mode comprise at least one of the following:

System bandwidth; subcarrier spacing; physical broadcast channel PBCH configuration parameters; physical downlink control channel PDCCH configuration parameters; uplink access resource configuration parameters; synchronization channel bandwidth; pilot position; number of available subcarriers.
The method according to claim 1, wherein different candidate sets correspond to different frequency bands, and the synchronization signal in the candidate set satisfies at least one of the following conditions:

The synchronization bandwidth of the synchronization signal in the candidate set is M*SYNCH_BW_basic, where SYNCH_BW_basic is the basic synchronization bandwidth, M>0, and the value of M is determined by detecting the synchronization signal;

The number of OFDM symbols occupied by the synchronization signal in the candidate set is n, and n is a natural number;

The subcarrier spacing corresponding to the synchronization signal in the candidate set is X*δf, where 1≤X≤M and X is an integer, and δf is a basic subcarrier spacing.
The method according to claim 4, wherein the M corresponding to the first type of frequency band is an integer greater than or equal to 1, and the value of M corresponding to the second type of frequency band is a rational number less than or equal to 1.
The method according to claim 5, wherein the first type of frequency band and the second type of frequency band are distinguished by 6 GHz, and the first frequency band has a starting frequency point greater than or equal to 6 GHz. The termination frequency of the second type of frequency band is less than 6 GHz.
The method of claim 6 wherein

Frequency band f0: a frequency band less than 6 GHz, the corresponding M value is 1/2 p , where p is 0, 1, 2, 3, 4;

Band f1: [6 GHz, 20 GHz), the corresponding M value is 2 p , where p is 0, 1, 2, 3, 4, 5;

Frequency band f2: [20 GHz, 30 GHz), the corresponding M value is 2 p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

Frequency band f3: [30 GHz, 52.6 GHz), the corresponding M value is 2 p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

Band f4: [52.6 GHz, 76 GHz], the corresponding M value is 2 p , where p is 0, 1, 2, 3, 4, 5, 6, 7;

In the frequency band f5: [80 GHz, 90 GHz], the corresponding M value is 2 p , where p is 0, 1, 2, 3, 4, 5, 6, 7, 8.
The method of claim 4, wherein said δf is 15 kHz; said SYNCH_BW_basic is 1.08 MHz; said n ≤ 16.
The method of claim 1, wherein the obtaining a synchronization signal candidate set comprises:

Receiving signaling, the signaling being used to indicate the candidate set; or,

The synchronization signal is blindly detected from all of the synchronization signal candidate sets to determine the candidate set.
The method of claim 3, wherein the configuration parameter of the PBCH comprises at least one of: a time domain location, a starting location in the time domain location in close proximity to a synchronization signal or a fixed time offset from a synchronization signal ; frequency domain position; continuous OFDM symbol number of orthogonal frequency division multiplexing.
The method according to claim 10, wherein the determining the parameters of the system transmission mode according to the detection result of the downlink synchronization comprises:

Determined by detecting the number of OFDM symbols that the synchronization signal continues and ratioPBCH_SYNCH The number of OFDM symbols that the PBCH continues, and the ratioPBCH_SYNCH is a ratio between the number of OFDM symbols that the pre-agreed PBCH continues and the number of OFDM symbols that the synchronization signal continues.
The method according to claim 11, wherein the ratioPBCH_SCYCH ranges from [1/4, 4].
The method according to claim 4, wherein when the parameter of the system transmission mode includes a system bandwidth, the method for acquiring the system bandwidth includes at least one of the following:

Determining the system bandwidth by detecting the synchronization signal of the center frequency point and the synchronization signal of the bandwidth edge;

The system bandwidth is determined according to the basic system bandwidth basicBW and M, wherein the basic system bandwidth basicBW ranges from [1.25MHz, 25MHz];

Knowing the system bandwidth through high layer signaling;

The system bandwidth is obtained by reading broadcast information transmitted on the PBCH.
The method according to claim 13, wherein when the parameter of the system transmission mode includes the number of available subcarriers, the method for acquiring the number of available subcarriers includes at least one of the following:

The number of available subcarriers corresponding to the system bandwidth is determined to be basicSubCarr*M according to the basic subcarrier number basicSubCarr corresponding to the basic system bandwidth basicBW;

The number of available subcarriers is obtained by reading the broadcast information transmitted on the PBCH.
The method according to claim 3 or 4, wherein when the parameter of the system transmission mode includes the uplink access resource configuration parameter, the method for obtaining the uplink access resource configuration parameter includes:

And determining, according to the start symbol of the detected synchronization signal, an uplink access resource symbol start position.
The method according to claim 3 or 4, wherein, when the PDCCH configuration parameter is included in the parameter of the system transmission mode, the determining the parameter of the system transmission mode according to the detection result of the downlink synchronization includes:

The location of the PDCCH is determined based on the start symbol and duration of the identified synchronization signal.
The method according to claim 3, wherein the performing downlink transmission or uplink transmission according to parameters of a system transmission mode includes:

Obtaining uplink or downlink configuration parameters of the transmission frame through the PDCCH, and performing data transmission according to the configuration parameters of the uplink or downlink channel.
The method according to claim 3, wherein the uplink access resource configuration parameter comprises at least one of: a frequency domain location where the uplink access signal is located, and an OFDM symbol number of the uplink access signal duration; correspondingly,

The method for obtaining the frequency domain location of the uplink access signal includes:

Determining a frequency domain location of the uplink access signal according to the detected frequency domain position of the synchronization signal;

The method for obtaining the number of OFDM symbols that the uplink access signal continues includes:

The number of OFDM symbols that the uplink access signal continues is determined according to the number of OFDM symbols that the detected synchronization signal continues.
The method according to claim 10, wherein the uplink access resource configuration parameter comprises at least one of: a frequency domain location where the uplink access signal is located, and an OFDM symbol number of the uplink access signal duration; correspondingly,

The method for obtaining the frequency domain location of the uplink access signal includes:

Determining a frequency domain location of the uplink access signal according to a frequency domain location of the PBCH;

The method for obtaining the number of OFDM symbols that the uplink access signal continues includes:

The number of OFDM symbols that the uplink access signal continues is determined according to the number of OFDM symbols that the PBCH continues.
A data transmission device comprising:

An acquiring unit, configured to acquire a synchronization signal candidate set, where the candidate set includes at least one synchronization signal;

a synchronization unit, configured to complete downlink synchronization according to the candidate set;

a determining unit, configured to determine a parameter of a system transmission mode according to the detection result of the downlink synchronization;

The transmission unit is configured to perform downlink transmission or uplink transmission according to parameters of the system transmission mode.
The apparatus of claim 20 wherein different synchronizations of said candidate sets There are at least one of the following distinguishing features between the signals: the sequence combinations are different; the subcarrier spacing is different; the number of consecutive orthogonal frequency division multiplexing OFDM symbols is different; the synchronization bandwidth is different.
The apparatus of claim 20, wherein the parameter of the system transmission mode comprises at least one of the following:

System bandwidth; subcarrier spacing; physical broadcast channel PBCH configuration parameters; physical downlink control channel PDCCH configuration parameters; uplink access resource configuration parameters; synchronization channel bandwidth; pilot position; number of available subcarriers.
The apparatus according to claim 20, wherein said obtaining unit is configured to:

Receiving signaling, the signaling being used to indicate the candidate set; or,

The synchronization signal is blindly detected from all of the synchronization signal candidate sets to determine the candidate set.
The apparatus according to claim 20, wherein said determining unit is configured to:

The number of OFDM symbols continued for the PBCH is determined by detecting the number of OFDM symbols that the synchronization signal continues and the ratioPBCH_SYNCH, which is the ratio between the number of OFDM symbols that the pre-agreed PBCH continues and the number of OFDM symbols that the synchronization signal continues.