阅读说明：本技术 用于时间同步的方法、装置和系统 (Method, device and system for time synchronization ) 是由 石兴建 王锦辉 徐川 于 2017-12-29 设计创作，主要内容包括：本申请提供了一种用于时间同步的方法、装置及系统。该方法能够提高时间同步的精度。包括：从节点接收来自主节点的第一信号；从节点对第一信号进行采样,以获得第一样本；从节点对第一样本进行量化,以获得第一样本的量化形式；从节点从第一样本的量化形式中检测第一同步序列,检测到第一同步序列的时间为T2；从节点接收来自主节点的第一信息,第一信息用于指示主节点发送第一同步序列的时间T1；从节点向主节点发送第二同步序列,发送第二同步序列的时间为T3；从节点接收来自主节点的第二信息,第二信息用于指示主节点检测到第二同步序列的量化形式的时间T4；从节点根据T1、T2、T3以及T4,进行时间同步。(The application provides a method, a device and a system for time synchronization. The method can improve the precision of time synchronization. The method comprises the following steps: receiving a first signal from a master node by a slave node; sampling a first signal from a node to obtain first samples; quantizing the first sample from the node to obtain a quantized version of the first sample; detecting a first synchronization sequence from the quantized version of the first sample by the slave node, wherein the time for detecting the first synchronization sequence is T2; the slave node receives first information from the master node, wherein the first information is used for indicating the time T1 when the master node sends the first synchronization sequence; the slave node sends a second synchronization sequence to the master node, and the time for sending the second synchronization sequence is T3; receiving, by the slave node, second information from the master node, the second information indicating a time T4 at which the master node detected a quantized version of the second synchronization sequence; the slave nodes are time synchronized according to T1, T2, T3, and T4.)

A method for time synchronization, comprising:

the method comprises the steps that a slave node receives a first signal from a master node, wherein the first signal comprises a first synchronization sequence;

the slave node samples the first signal to obtain a first sample;

the slave node quantizes the first sample to obtain a quantized version of the first sample;

the slave node detecting the first synchronization sequence from the quantized version of the first sample at time T2;

the slave node receives first information from the master node, wherein the first information is used for indicating the time T1 when the master node sends the first synchronization sequence;

the slave node sends a second synchronization sequence to the master node, and the time for sending the second synchronization sequence is T3;

the slave node receiving second information from the master node indicating a time T4 at which the master node detected a quantized form of the second synchronization sequence;

the slave node performs time synchronization between the slave node and the master node according to T1, T2, T3, and T4.

The method of claim 1, wherein the slave node detecting the first synchronization sequence from a quantized version of the first sample comprises:

the slave node performs correlation peak detection of the quantized version of the first sample for the first synchronization sequence.

The method of claim 1, further comprising a third synchronization sequence for group synchronization in the first signal, wherein a first offset exists between a first symbol of the third synchronization sequence and a first symbol of the first synchronization sequence;

the slave node detecting the first synchronization sequence from the quantized version of the first sample, comprising:

the slave node determining a first position, the first position being a position of a first symbol of the third synchronization sequence in a quantized version of the first sample;

the slave node determining a second position from the first position and the first offset, the second position being a position of a first symbol of the first synchronization sequence in a quantized version of the first sample;

the slave node obtaining a quantized version of a second sample from the second location, the first sample comprising the second sample;

the slave node detects the first synchronization sequence from a quantized version of the second sample.

The method of claim 3, wherein the determining the first location by the slave node comprises:

the slave node performing correlation peak detection of the quantized version of the first sample for the third synchronization sequence to determine the first location;

the slave node detecting the first synchronization sequence from the quantized version of the second sample, comprising: the slave node performs correlation peak detection of the quantized version of the second sample for the first synchronization sequence.

The method of any of claims 1-4, wherein the slave node sending a second synchronization sequence to the master node comprises:

the slave node generating an encoded codeword;

the slave node inserts the second synchronization sequence into the encoded codeword, wherein the time to insert the second synchronization sequence is T3;

the slave node processes the code word inserted into the second synchronization sequence to generate a second signal;

the slave node transmits the second signal to the master node.

The method of claim 5, wherein the method further comprises:

and the slave node inserts a fourth synchronization sequence for group synchronization into the coded code word, wherein a second offset exists between a first code element of the fourth synchronization sequence and a first code element of the second synchronization sequence.

A method for time synchronization, comprising:

the method comprises the steps that a main node sends a first signal to a slave node, wherein the first signal comprises a first synchronization sequence;

the master node sends first information to the slave node, wherein the first information is used for indicating the time T1 when the master node sends the first synchronization sequence;

the master node receiving a second signal from the slave node, the second signal comprising a second synchronization sequence;

the master node samples the second signal to obtain a third sample;

the master node quantizes the third sample to obtain a quantized version of the third sample;

the master node detecting the second synchronization sequence from the quantized version of the third sample at time T4;

the master node transmits second information to the slave node, the second information indicating T4, wherein T1, T4 are used for time synchronization between the master node and the slave node.

The method of claim 7, wherein the master node detecting the second synchronization sequence from a quantized version of the third sample comprises:

the master node performs correlation peak detection of the second synchronization sequence on the quantized version of the third sample.

The method of claim 7, further comprising a fourth synchronization sequence for group synchronization in the second signal, wherein a second offset exists between a first symbol of the fourth synchronization sequence and a first symbol of the second synchronization sequence;

the master node detecting the second synchronization sequence from the quantized version of the third sample, comprising:

the master node determining a third position, the third position being a position of a first symbol of the fourth synchronization sequence in a quantized version of the third sample;

the master node determining a fourth position according to the third position and the second offset, the fourth position being a position of a first symbol of the second synchronization sequence in a quantized version of the third sample;

the master node obtaining a quantized version of a fourth sample from the fourth location, the third sample comprising the fourth sample;

the master node detects the second synchronization sequence from a quantized version of the fourth sample.

The method of claim 9, wherein the master node determines a third location comprising:

the master node performing correlation peak detection of the fourth synchronization sequence on the quantized version of the third sample to determine the third position;

the master node detecting the second synchronization sequence from the quantized version of the fourth sample, comprising: the master node performs correlation peak detection of the second synchronization sequence on the quantized version of the fourth sample.

The method of any one of claims 7-10, wherein the master node transmitting a first signal to a slave node comprises:

the main node generates a code word;

the main node inserts the first synchronization sequence into the code word, wherein the time for inserting the first synchronization sequence is T1;

the master node processes the code word inserted into the first synchronization sequence to generate the first signal;

the master node transmits the first signal to the slave node.

The method of claim 11, wherein the method further comprises:

and the main node inserts a third synchronization sequence for group synchronization into the coded code word, wherein a first offset exists between a first code element of the third synchronization sequence and a first code element of the first synchronization sequence.

A node, characterized in that it comprises means for performing the method according to any of claims 1-6.

A node, characterized in that it comprises means for performing the method according to any of claims 7-12.

A node, comprising:

a memory for storing computer instructions;

a communication interface for communicating with other devices;

a processor for executing computer instructions stored in the memory, the processor for performing the method of any of claims 1-6 when the computer instructions are executed.

A node, comprising:

a memory for storing computer instructions;

a communication interface for communicating with other devices;

a processor for executing computer instructions stored in the memory, the processor for performing the method of any of claims 7-12 when the computer instructions are executed.

A master-slave synchronization system, comprising; a node according to claim 13 and a node according to claim 14.

A master-slave synchronization system, comprising: a node as claimed in claim 15 and a node as claimed in claim 16.

A computer-readable medium for storing a computer program, characterized in that the computer program comprises instructions for performing the method of any of claims 1-6.

A computer-readable medium for storing a computer program, characterized in that the computer program comprises instructions for performing the method of any of claims 7-12.