Signal detection method and apparatus, signal sending method and apparatus, remote user device, and storage medium

1. A signal detection method, applied to a first user equipment and comprises:

sending, based on a first timing reference, a first synchronization signal to a second user equipment, wherein the first synchronization signal is used for the second user equipment to obtain the first timing reference and send a first discovery signal based on the first timing reference;

detecting, based on the first timing reference, the first discovery signal sent by the second user equipment; wherein the first discovery signal carries synchronization information; and

after the first discovery signal is detected, detecting, within a first time window corresponding to the synchronization information, a second synchronization signal sent by the second user equipment;

wherein the synchronization information comprises an offset between the first timing reference and a second timing reference, or the synchronization information comprises an offset between the first timing reference and a second timing reference as well as a parameter of the first time window; wherein the second timing reference is a timing reference based on which the second user equipment sends the second synchronization signal;

wherein in a case where the synchronization information comprises the offset between the first timing reference and the second timing reference, detecting, within the first time window corresponding to the synchronization information, the second synchronization signal sent by the second user equipment comprises: determining, based on the first timing reference and according to the synchronization information and a parameter of the first time window, the first time window; and detecting, within the determined first time window, the second synchronization signal sent by the second user equipment; and

in a case where the synchronization information comprises the offset between the first timing reference and the second timing reference as well as the parameter of the first time window, detecting, within the first time window corresponding to the synchronization information, the second synchronization signal sent by the second user equipment comprises: determining, based on the first timing reference and according to the synchronization information, the first time window; and detecting, within the determined first time window, the second synchronization signal sent by the second user equipment.

2. The method of claim 1 , wherein the first synchronization signal comprises at least one of a first sidelink synchronization signal (SLSS) or a first physical sidelink broadcast channel (PSBCH); and the second synchronization signal comprises at least one of a second SLSS or a second PSBCH.

3. The method of claim 1 , wherein before detecting, based on the first timing reference, the first discovery signal sent by the second user equipment, the method further comprises:

sending a second discovery signal to the second user equipment based on the first timing reference, wherein the second discovery signal carries at least one of the following information: recognition information of the first user equipment for instructing that the first user equipment has a requirement to discover a relay user equipment, time delay information for sending the first discovery signal by the second user equipment, time window information for sending the first discovery signal by the second user equipment, or resource position information for sending the first discovery signal by the second user equipment.

4. The method of claim 3 , wherein detecting, based on the first timing reference, the first discovery signal sent by the second user equipment comprises at least one of:

in a case where the second discovery signal carries the time delay information for sending the first discovery signal by the second user equipment, detecting, based on the first timing reference and within a time delay corresponding to the time delay information carried by the second discovery signal, the first discovery signal sent by the second user equipment;

in a case where the second discovery signal carries the time window information for sending the first discovery signal by the second user equipment, detecting, based on the first timing reference and within a time window corresponding to the time window information carried by the second discovery signal, the first discovery signal sent by the second user equipment; or

in a case where the second discovery signal carries the resource position information for sending the first discovery signal by the second user equipment, detecting, based on the first timing reference and on a resource position corresponding to the resource position information carried by the second discovery signal, the first discovery signal sent by the second user equipment.

5. A signal sending method, applied to a second user equipment and comprises:

detecting a first synchronization signal sent by a first equipment;

sending a first discovery signal to the first equipment based on a first timing reference, wherein the first timing reference is a timing reference obtained by detecting the first synchronization signal; the first discovery signal carries synchronization information, wherein the synchronization information is used by the first user equipment to determine a first time window used for detecting a second synchronization signal; and

sending the second synchronization signal to the first equipment based on a second timing reference;

wherein the synchronization information comprises an offset between the first timing reference and the second timing reference, or the synchronization information comprises an offset between the first timing reference and the second timing reference as well as a parameter of the first time window.

6. The method of claim 5 , wherein the first synchronization signal comprises at least one of a first sidelink synchronization signal (SLSS) or a first physical sidelink broadcast channel (PSBCH); and the second synchronization signal comprises at least one of a second SLSS or a second PSBCH.

7. The method of claim 5 , wherein after detecting the first synchronization signal sent by the first equipment, the method further comprises:

receiving, based on the first timing reference, a second discovery signal sent by the first equipment, wherein the second discovery signal carries at least one of the following information: recognition information of the first user equipment for instructing that the first user equipment has a requirement to discover a relay user equipment, time delay information for sending the first discovery signal by the second user equipment, time window information for sending the first discovery signal by the second user equipment, or resource position information for sending the first discovery signal by the second user equipment.

8. The method of claim 7 , wherein in a case where the second discovery signal carries the recognition information of the first user equipment, after receiving the second discovery signal, the method further comprises:

determining, according to the recognition information, that the first user equipment is a remote user equipment having a requirement to discover the relay user equipment.

9. The method of claim 7 , wherein in a case where the second discovery signal carries at least one of the time delay information, the time window information, or the resource information, after receiving the second discovery signal, the method further comprises at least one of:

determining a time delay for sending the first discovery signal according to the time delay information, and sending the first discovery signal within the determined time delay;

determining a time window for sending the first discovery signal according to the time window information, and sending the first discovery signal within the determined time window for sending the first discovery signal; or

determining a resource for sending the first discovery signal according to the resource information, and sending the first discovery signal on the determined resource.

10. A signal detection apparatus, located in a first user equipment and comprises a processor and a storage device for storing computer executable instructions that when executed by the processor cause the processor to:

send, based on a first timing reference, a first synchronization signal to a second user equipment, wherein the first synchronization signal is used for the second user equipment to obtain the first timing reference and send a first discovery signal based on the first timing reference;

detect, based on the first timing reference, the first discovery signal sent by the second user equipment; wherein the first discovery signal carries synchronization information; and

after the first discovery signal is detected, detect, within a first time window corresponding to the synchronization information, a second synchronization signal sent by the second user equipment;

wherein the synchronization information comprises an offset between the first timing reference and a second timing reference, or the synchronization information comprises an offset between the first timing reference and a second timing reference as well as a parameter of the first time window; wherein the second timing reference is a timing reference based on which the second user equipment sends the second synchronization signal;

wherein in a case where the synchronization information comprises the offset between the first timing reference and the second timing reference, detecting, within the first time window corresponding to the synchronization information, the second synchronization signal sent by the second user equipment comprises: determining, based on the first timing reference and according to the synchronization information and a parameter of the first time window, the first time window; and detecting, within the determined first time window, the second synchronization signal sent by the second user equipment; and

in a case where the synchronization information comprises the offset between the first timing reference and the second timing reference as well as the parameter of the first time window, detecting, within the first time window corresponding to the synchronization information, the second synchronization signal sent by the second user equipment comprises: determining, based on the first timing reference and according to the synchronization information, the first time window; and detecting, within the determined first time window, the second synchronization signal sent by the second user equipment.

11. The apparatus of claim 10 , wherein the first synchronization signal comprises at least one of a first sidelink synchronization signal (SLSS) or a first physical sidelink broadcast channel (PSBCH); and the second synchronization signal comprises at least one of a second SLSS or a second PSBCH.

12. The apparatus of claim 10 , wherein the processor is further configured to:

send a second discovery signal to the second user equipment based on the first timing reference, wherein the second discovery signal carries at least one of the following information: recognition information of the first user equipment for instructing that the first user equipment has a requirement to discover a relay user equipment, time delay information for sending the first discovery signal by the second user equipment, time window information for sending the first discovery signal by the second user equipment, or resource position information for sending the first discovery signal by the second user equipment.

13. A signal sending apparatus, comprising a processor and a storage device for storing computer executable instructions that when executed by the processor cause the processor to perform the followings to implement the method according to claim 3 :

detecting a first synchronization signal sent by a first equipment;

sending a first discovery signal to the first equipment based on a first timing reference, wherein the first timing reference is a timing reference obtained by detecting the first synchronization signal, the first discovery signal carries synchronization information, wherein the synchronization information is used by the first user equipment to determine a first time window used for detecting a second synchronization signal; and

sending the second synchronization signal to the first equipment based on a second timing reference;

wherein the synchronization information comprises an offset between the first timing reference and the second timing reference, or the synchronization information comprises an offset between the first timing reference and the second timing reference as well as a parameter of the first time window.

14. The apparatus of claim 13 , wherein the first synchronization signal comprises at least one of a first sidelink synchronization signal (SLSS) or a first physical sidelink broadcast channel (PSBCH); and the second synchronization signal comprises at least one of a second SLSS or a second PSBCH.

15. The apparatus of claim 13 , wherein the processor is further configured to:

receive, based on the first timing reference, a second discovery signal sent by the first equipment, wherein the second discovery signal carries at least one of the following information: recognition information of the first user equipment for instructing that the first user equipment has a requirement to discover a relay user equipment, time delay information for sending the first discovery signal by a second user equipment, time window information for sending the first discovery signal by the second user equipment, or resource position information for sending the first discovery signal by the second user equipment.