Method, device, access point, and storage medium for carrier selecting

1. A carrier selecting method, wherein the method comprises:

selecting, by an access point, unlicensed carriers satisfying a first condition from unlicensed carriers as a first carrier set;

sending a discovery signal on all unlicensed carriers in the first carrier set; and

receiving, by the access point, a measurement result performed by a user equipment on all the unlicensed carriers in the first carrier set, and selecting unlicensed carriers satisfying a second condition from the first carrier set based on the measurement result as carrier resources of the access point;

wherein the first condition comprises at least one of:

carrier energy being less than a first set threshold, carrier sensing being less than a second set threshold, or a number of occupied subcarriers in the carrier being below a third set threshold; and

wherein the second condition comprises at least one of:

a number of carriers used by neighboring access points being below a fourth set threshold, a discovery signal intensity being greater than a fifth set threshold, or a load being below a sixth set threshold.

2. The method according to claim 1 , wherein after the access point selects unlicensed carriers satisfying a first condition from unlicensed carriers, the method further comprises:

sending, by the access point, a first carrier set information, whether the unlicensed carriers send a discovery signal, and a discovery signal configuration parameter to the user equipment, and instructing the user equipment to measure all the unlicensed carriers in the first carrier set.

3. The method according to claim 2 , wherein the access point sends the first carrier set information, whether the unlicensed carriers send the discovery signal, and the discovery signal configuration parameter to the user equipment via a currently available carrier.

4. The method according to claim 1 , wherein after selecting unlicensed carriers satisfying a second condition from the first carrier set based on the measurement result, the method further comprises:

sending information of the unlicensed carriers satisfying the second condition to the user equipment.

5. The method according to claim 1 , wherein the method further comprises:

updating a carrier resource of an unlicensed carrier of the access point when the access point does not use unlicensed carriers satisfying the second condition; and

selecting at least one unlicensed carrier based on the at least one unlicensed carrier satisfying the second condition as a current carrier resource when the access point uses unlicensed carriers satisfying the second condition.

6. The method according to claim 5 , wherein after selecting at least one unlicensed carrier based on the at least one unlicensed carrier satisfying the second condition, the method further comprises:

sending information of the at least one unlicensed carrier to the user equipment.

7. The method according to claim 5 , wherein after selecting at least one unlicensed carrier based on the at least one unlicensed carrier satisfying the second condition, the method further comprises:

sending, by the access point, ON/OFF instruction information of the at least one unlicensed carrier to at least one of the user equipment or the neighboring access points through other unlicensed carriers that the access point has occupied on a licensed carrier.

8. The method according to claim 7 , wherein the ON/OFF instruction information comprises at least one of a carrier number, a carrier ON/OFF state, a carrier ON time, or a carrier ON time delay.

9. The method according to claim 7 , wherein the access point sends the ON/OFF instruction information of the at least one unlicensed carrier to at least one of the user equipment or the neighboring access points via Downlink Control Information (DCI), Radio Resource Control (RRC) signaling, or Media Access Control (MAC) signaling.

10. The method according to claim 5 , wherein updating a carrier resource of an unlicensed carrier of the access point comprises:

continuously receiving the measurement result performed by the user equipment for all the unlicensed carriers in the first carrier set and selecting an unlicensed carrier satisfying the second condition from the first carrier set based on the measurement result as a carrier resource of the access point.

11. A non-transitory storage medium in which a computer program is stored, wherein the computer program is configured to perform the carrier selecting method according to claim 1 .

12. A carrier selecting device, wherein the device comprises:

a processor; and

a memory for storing instructions executable by the processor;

wherein the processor is configured to:

select unlicensed carriers satisfying a first condition from unlicensed carriers as a first carrier set;

send a discovery signal on all unlicensed carriers in the first carrier set;

receive a measurement result performed by a user equipment on all the unlicensed carriers in the first carrier set; and

select unlicensed carriers satisfying a second condition from the first carrier set based on the measurement result as carrier resources of an access point;

wherein the first condition comprises at least one of:

carrier energy being less than a first set threshold, carrier sensing being less than a second set threshold, or a number of occupied subcarriers in the carrier being below a third set threshold; and

wherein the second condition comprises at least one of:

a number of carriers used by neighboring access points being below a fourth set threshold, a discovery signal intensity being greater than a fifth set threshold, or a load being below a sixth set threshold.

13. The device according to claim 12 , wherein the processor is further configured to, after selecting unlicensed carriers satisfying a first condition from unlicensed carriers, send the first carrier set information, whether the unlicensed carriers send a discovery signal, and a discovery signal configuration parameter to the user equipment, and instruct the user equipment to measure all the unlicensed carriers in the first carrier set.

14. The device according to claim 12 , wherein the processor is further configured to update a carrier resource of an unlicensed carrier of the access point when the device does not use unlicensed carriers satisfying the second condition; and

select at least one unlicensed carrier based on the at least one unlicensed carrier satisfying the second condition as a current carrier resource when the access point uses unlicensed carriers satisfying the second condition.

15. An access point, wherein the access point comprises the carrier selecting device according to claim 12 .