JP-2026514289-A - Wireless communication methods and devices

Abstract

A wireless communication method and device are provided. The method includes the following: A first device receives a first target signal and a second target signal in a target time unit. The first target signal includes a first signal and a second signal, the second target signal includes a third signal, the first and third signals are transmitted spontaneously by the second device, the second signal is transmitted by the third device by backscattering of a fourth signal, and the first signal, the third signal and the fourth signal all include pilot signals.

Inventors

• シュイ、ウェイチエ
• ツイ、ションチエン
• チャン、チー

Assignees

• オッポ広東移動通信有限公司

Dates

Publication Date

20260508

Application Date

20230208

Claims (20)

1. A wireless communication method, The first device includes receiving a first target signal and a second target signal in a target time unit, The first target signal includes a first signal and a second signal, the second target signal includes a third signal, the first signal and the third signal are transmitted spontaneously by a second device, the second signal is transmitted by a third device by backscattering of a fourth signal, and the first signal, the third signal and the fourth signal each include a pilot signal. A wireless communication method characterized by the following:
2. The time domain position of the aforementioned target time unit is predetermined or set by a network device. The method according to feature 1.
3. The aforementioned target time unit is periodic. The method according to 1 or 2, characterized by the above.
4. Within one period, the distribution of the target time units satisfies the first pattern. The method according to feature 3.
5. The first pattern is predefined or configured by a network device. The method according to feature 4.
6. The target time unit includes a first time period and a second time period, wherein the first target signal is received within the first time period and the second target signal is received within the second time period. The method according to any one of claims 2 to 5, characterized by the features described herein.
7. The position of the first time zone in the target time unit and the position of the second time zone in the target time unit are predetermined, or set by a network device, and/or The length of the first time period and the length of the second time period are predetermined or set by a network device. The method according to feature 6.
8. The bandwidth of the second signal is the same as the bandwidth of the first signal, or the bandwidth of the second signal is a part of the bandwidth of the first signal. The method according to any one of claims 1 to 6, characterized by the features described herein.
9. The target time unit is determined based on the encoding scheme used for the data signal in the second signal. The method according to feature 1.
10. The target time unit is a time unit for the third device to transmit a specific bit. The method according to 1 or 9, characterized by the above.
11. The target time unit includes a first time period and a second time period, wherein the first target signal is received within the first time period, the second target signal is received within the second time period, the first time period is the time period corresponding to a high level in the time unit for the third device to transmit a specific bit, and the second time period is the time period corresponding to a low level in the time unit for transmitting a specific bit. The method according to 1, 9, or 10, characterized by the features described above.
12. The aforementioned specific bit is bit 1. The method according to 10 or 11, characterized by the features described herein.
13. The above method further, This includes determining whether the at least one time unit is the target time unit based on the channel estimation result of the signal received in at least one time unit, The method according to any one of claims 9 to 12, characterized by...
14. The at least one time unit includes a first time unit, the first time unit includes a first time period and a second time period, and determining whether the at least one time unit is the target time unit based on the channel estimation result of the signal received in the at least one time unit is, Channel estimation is performed on the signals received within the first time period and the signals received within the second time period to obtain a first channel estimation result and a second channel estimation result, Based on the first channel estimation result and the second channel estimation result, it is determined whether the first time unit is a target time unit, including, The method according to the present invention, characterized by the present invention.
15. Based on the first channel estimation result and the second channel estimation result, determining whether the first time unit is a target time unit is: If the difference between the first channel estimation result and the second channel estimation result is greater than a first threshold, the first time unit is identified as the target time unit, including The method according to feature 14.
16. The at least one time unit includes a second time unit, the second time unit includes a third time period and a fourth time period, and determining whether the at least one time unit is the target time unit based on the channel estimation result of the signal received in the at least one time unit is, Based on the pilot signal received within the third time period, channel estimation and data demodulation are performed on the signal received within the third time period to obtain a third channel estimation result and a first data demodulation result. Based on the pilot signal received within the fourth time period, channel estimation and data demodulation are performed on the signal received within the fourth time period to obtain a fourth channel estimation result and a second data demodulation result. Based on the fourth channel estimation result and the first data demodulation result, the signal received within the third time period is reconstructed to obtain the first data signal. Based on the signal received within the third time period and the first data signal, it is determined whether the second time unit is a target time unit. including, The method according to the present invention, characterized by the present invention.
17. Determining whether the second time unit is a target time unit based on the signal received within the third time period and the first data signal is: The residual signal is obtained by subtracting the first data signal from the signal received within the third time period, Based on the residual signal, determine whether the second time unit is the target time unit. including, The method according to 16, characterized by...
18. Based on the residual signal, determining whether the second time unit is the target time unit is: If the energy of the residual signal is greater than a second threshold, the second time unit is identified as the target time unit, including: The method according to feature 17.
19. The above method further, This includes identifying channel information of the backscatter link of the third device based on the first target signal and the second target signal, The method according to any one of claims 1 to 18, characterized by the features described above.
20. Identifying the channel information of the backscatter link of the third device based on the first target signal and the second target signal is: Perform channel estimation for the first target signal and the second target signal, Based on the difference between the channel estimation result of the first target signal and the channel estimation result of the second target signal, the channel information of the backscatter link of the third device is identified. including, The method according to feature 19.

Description

The embodiments of this application relate to the field of communications, and more specifically, to wireless communication methods and devices. Zero-power terminals can achieve backscattering communication based on radio signals. Zero-power terminals (also called zero-power devices) are characterized by their low complexity and support only simple modulation schemes such as Amplitude Shift Keying (ASK). Therefore, when a zero-power terminal accesses a system, the receiver in the system uses envelope detection to receive the signal transmitted by the zero-power terminal. This affects the signal reception performance. This application provides a wireless communication method and device, which are advantageous for improving the reception performance of signals transmitted by a zero-power terminal. In a first embodiment, a wireless communication method is provided. This method includes the following: A first device receives a first target signal and a second target signal in a target time unit. The first target signal includes a first signal and a second signal, the second target signal includes a third signal, the first and third signals are transmitted spontaneously by the second device, the second signal is transmitted by the third device by the backscattering of a fourth signal, and the first, third, and fourth signals all include pilot signals. In a second embodiment, a wireless communication method is provided. This method includes the following: A third device backscatters a fourth signal within a first time period in a target time unit, and does not backscatter the fourth signal within a second time period in the target time unit. The fourth signal is transmitted spontaneously by the second device, and the fourth signal includes a pilot signal. In a third embodiment, a wireless communication method is provided. This method includes the following: A second device transmits a first signal within a first time period in a target time unit and a third signal within a second time period in the target time unit. The first and third signals are transmitted spontaneously by the second device, and both the first and third signals include pilot signals. The first signal is used by the third device to perform backscattering within the first time period. In the fourth aspect, a communication device is provided. The communication device is configured to perform the method described in the first aspect or each embodiment thereof. Specifically, the communication device comprises a functional unit configured to perform the method described in the first aspect or each embodiment thereof. In the fifth aspect, a communication device is provided. The communication device is configured to perform the method described in the second aspect or each embodiment thereof. Specifically, the communication device comprises a functional unit configured to perform the method described in the second aspect or each embodiment thereof. In the sixth aspect, a communication device is provided. This communication device is configured to perform the method described in the third aspect or each embodiment thereof. Specifically, the communication device comprises a functional unit configured to perform the method described in the third aspect or each embodiment thereof. In the seventh aspect, a communication device is provided. The communication device comprises a processor and memory. The memory is configured to store computer programs. The processor is configured to call and execute the computer programs stored in the memory to perform any of the first to third aspects or the methods described in each embodiment of that aspect. In the eighth aspect, a chip is provided. The chip is configured to perform any of the first to third aspects or the methods described in each embodiment of that aspect. Specifically, the chip includes a processor, which is configured to call and execute a computer program stored in memory to cause a device equipped with the chip to perform any of the first to third aspects or the methods described in each embodiment of that aspect. In the ninth aspect, a computer-readable storage medium is provided. This computer-readable storage medium is configured to store a computer program, which is configured to cause a computer to execute any of the first to third aspects or the methods described in each embodiment of that aspect. In the tenth aspect, a computer program product is provided. This computer program product includes computer program instructions, which are configured to cause a computer to execute any of the first to third aspects or the methods in each embodiment of that aspect. In the eleventh aspect, a computer program is provided. When executed on a computer, this computer program is configured to cause the computer to execute one of the first to third aspects or the methods described in each embodiment of that aspect. According to the above proposed technology, in both cases—when the third device performs back