阅读说明：本技术 一种背向散射通信方法及装置 (Back scattering communication method and device ) 是由 甄斌 于 2018-03-23 设计创作，主要内容包括：本申请提供了一种背向散射通信方法及装置,该方法包括：发送设备接收基站发送的唤醒wakeup信号；所述发送设备根据所述wakeup信号确定待发送数据的发送起始时刻；所述发送设备在从所述发送起始时刻起的第k个发送时间间隔内,根据所述待发送数据中第k个比特值,对所述基站发送的激励信号进行散射处理,所述散射处理为散射所述基站发送的激励信号或者不散射所述激励信号,k＝1,2,……n,n为所述待发送数据所包含的比特数量。本申请的发送设备可以根据待发送比特值对基站发送的激励信号进行相应地散射处理,以使接收设备根据该发送时间间隔内接收到的信号的能量确定相应的比特值,从而利用基站发送的激励信号完成低功耗或零功耗的背向散射通信。本实施例提供的方法提高了网络的覆盖能力,可以应用于物联网,例如MTC、IoT、LTE-M,M2M等。(The application provides a backscattering communication method and a backscattering communication device, wherein the method comprises the following steps: the sending equipment receives a wakeup signal sent by the base station; the sending equipment determines the sending starting time of the data to be sent according to the wakeup signal; and the sending equipment performs scattering processing on the excitation signal sent by the base station according to a kth bit value in the data to be sent in a kth sending time interval from the sending starting time, wherein the scattering processing is to scatter the excitation signal sent by the base station or not to scatter the excitation signal, k is 1,2, … … n, and n is the number of bits contained in the data to be sent. The sending device can correspondingly scatter the excitation signal sent by the base station according to the bit value to be sent, so that the receiving device determines the corresponding bit value according to the energy of the signal received in the sending time interval, and therefore the low-power-consumption or zero-power-consumption backscattering communication is completed by utilizing the excitation signal sent by the base station. The method provided by the embodiment improves the coverage capability of the network, and can be applied to the internet of things, such as MTC, IoT, LTE-M, M2M and the like.)

A method of backscatter communication, comprising:

the sending equipment receives a wakeup signal sent by the base station;

the sending equipment determines the sending starting time of the data to be sent according to the wakeup signal;

and the sending equipment performs scattering processing on the excitation signal sent by the base station according to a kth bit value in the data to be sent in a kth sending time interval from the sending starting time, wherein the scattering processing is to scatter the excitation signal sent by the base station or not to scatter the excitation signal, k is 1,2, … … n, and n is the number of bits contained in the data to be sent.

The method of claim 1, wherein the kth transmission time interval comprises at least one symbol, and wherein a start time and an end time of the kth transmission time interval are both located at a boundary of a symbol.

The method according to claim 1 or 2, wherein the determining, by the transmitting device, the transmission start time of the data to be transmitted according to the wakeup signal includes:

the sending equipment determines a monitoring starting moment according to the wakeup signal;

the sending equipment detects the energy of a signal received in the ith sending time interval from the monitoring starting time, the signal is the excitation signal or the combination of the excitation signal and a scattering signal, the scattering signal is a signal generated after other sending equipment except the sending equipment scatters the excitation signal, i is 1,2, … … m, and m is a positive integer;

and if the energy of the signals received by the sending equipment in the m sending time intervals is the same, determining the end time of the m sending time interval as the sending start time of the data to be sent.

The method according to claim 1,2 or 3, wherein the transmission start time and the transmission end time of the data to be transmitted are both located in the same time cell, and the transmission end time of the data to be transmitted is not located at the boundary of the time cell, and the energy of the excitation signal transmitted by the base station in each symbol in the time cell is the same.

A method of backscatter communication, comprising:

the receiving equipment receives a wakeup signal sent by the base station;

the receiving equipment determines the detection starting moment according to the wakeup signal;

the receiving equipment sequentially determines the energy value of a signal received in each detection time interval from the detection starting moment, and determines a bit value according to each energy value, wherein the signal is an excitation signal sent by the base station or a combination of the excitation signal and a scattering signal, and the scattering signal is a signal generated after the sending equipment scatters the excitation signal;

the receiving device determines target data when obtaining p continuous bit values which are the same as a preset lead code and obtaining q continuous bit values which are the same as preset address information in a first preset time period after obtaining the p bit values, wherein the target data comprises the p bit values, the q bit values and s continuous bit values after the q bit values, and p, q and s are positive integers.

The method of claim 5, wherein determining a bit value from each of the energy values comprises:

and determining a bit value corresponding to each energy value through comparison between each energy value and a reference value, wherein the reference value is the energy value of the wakeup signal received by the receiving device in one detection time interval.

The method according to claim 5 or 6, wherein the detection time interval comprises at least one symbol, and wherein the start time and the end time of the detection time interval are both located at the boundary of the symbol.

The method of claim 5, 6 or 7, further comprising:

and when the receiving device does not obtain p continuous bit values which are the same as a preset lead code in a second preset time period after the receiving device receives the wakeup signal, or does not obtain q continuous bit values which are the same as preset address information in a first preset time period after the p bit values are obtained, terminating the determination of the energy value of the received signal in each detection time interval, and terminating the determination of the bit value obtained in each detection time interval according to the energy value.

A backscatter communications device, comprising:

the receiving unit is used for receiving the wakeup signal sent by the base station;

the processing unit is used for determining the sending starting time of the data to be sent according to the wakeup signal;

a sending unit, configured to perform scattering processing on the excitation signal sent by the base station in a kth sending time interval from the sending start time according to a kth bit value in the data to be sent, where the scattering processing is to scatter the excitation signal sent by the base station or not to scatter the excitation signal, k is 1,2, … … n, and n is a number of bits included in the data to be sent.

The apparatus of claim 9, wherein the kth transmission time interval comprises at least one symbol, and wherein a start time and an end time of the kth transmission time interval are both located at a boundary of a symbol.

The apparatus according to claim 9 or 10, wherein the processing unit is specifically configured to:

determining a monitoring starting time according to the wakeup signal;

detecting energy of a signal received in an ith sending time interval from the monitoring starting time, wherein the signal is the excitation signal or a combination of the excitation signal and a scattering signal, the scattering signal is a signal generated after other sending equipment except the sending equipment scatters the excitation signal, i is 1,2, … … m, and m is a positive integer;

and when the energy of the signals received by the sending equipment in the m sending time intervals is the same, determining the end time of the m sending time interval as the sending start time of the data to be sent.

The apparatus according to claim 9, 10 or 11, wherein the transmission start time and the transmission end time of the data to be transmitted are both located in the same time unit, and the transmission end time of the data to be transmitted is not located at the boundary of the time unit, and the energy of the excitation signal transmitted by the base station in each symbol in the time unit is the same.

A backscatter communications device, comprising:

the receiving unit is used for receiving the wakeup signal sent by the base station;

the processing unit is used for determining the detection starting time according to the wakeup signal;

the receiving unit is further configured to sequentially determine an energy value of a signal received in each detection time interval from the detection start time, and determine a bit value according to each energy value, where the signal is an excitation signal sent by the base station or a combination of the excitation signal and a scattering signal, and the scattering signal is a signal generated after the transmitting device scatters the excitation signal;

the processing unit is further configured to determine target data when p continuous bit values identical to a preset preamble are obtained and q continuous bit values identical to preset address information are obtained within a first preset time period after the p bit values are obtained, where the target data includes the p bit values, the q bit values, and s continuous bit values after the q bit values, and p, q, and s are positive integers.

The apparatus according to claim 13, wherein the receiving unit is specifically configured to:

and determining a bit value corresponding to each energy value through comparison between each energy value and a reference value, wherein the reference value is the energy value of the wakeup signal received by the receiving device in one detection time interval.

The apparatus according to claim 13 or 14, wherein the detection time interval comprises at least one symbol, and wherein the start time and the end time of the detection time interval are both located at the boundary of the symbol.

The apparatus of claim 13, 14 or 15, wherein the processing unit is further configured to:

when the receiving device does not obtain p continuous bit values which are the same as a preset lead code in a second preset time period after the receiving device receives the wakeup signal, or does not obtain q continuous bit values which are the same as preset address information in a first preset time period after the p bit values are obtained, stopping determining the energy value of the received signal in each detection time interval, and stopping determining the bit value obtained in each detection time interval according to the energy value.

A communication system comprising the apparatus of any of claims 9-12 and the apparatus of any of claims 13-16.