Signal sending and receiving method to pair user equipment

1. A signal sending method, comprising:

determining, by a base station, based on receiver capabilities of user equipments, that a first user equipment is to be paired with N second user equipments on a first resource block, wherein N is a positive integer, comprising:

determining, by the base station, a multi-user (MU) weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the N second user equipments; and

determining, by the base station based on the MU weight of the first user equipment and the MU weights of the N second user equipments, that the first user equipment is to be paired with the N second user equipments, including: sorting the first user equipment and the N second user equipments in ascending order of the receiver capabilities, wherein 1 st user equipment to M th user equipment are high-level user equipments, and (M+1) th user equipment to (N+1) th user equipment are low-level user equipments;

multiplexing, by the base station, a signal of the first user equipment and signals of the N second user equipments onto the first resource block; and

sending the signals.

2. The method according to claim 1 , wherein the determining, by the base station, a MU weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the second user equipments comprises:

obtaining MU weights of the high-level user equipments by performing mutual zero forcing between the M high-level user equipments; and

obtaining MU weights of the low-level user equipments by performing mutual zero forcing between the first user equipment and the N second user equipments.

3. The method according to claim 2 , wherein

the MU weights of the low-level user equipments are obtained by performing mutual zero forcing between the first user equipment and the N second user equipments by using an MU weight calculation method, wherein

the MU weight calculation method is determined based on service types of the low-level user equipments.

4. The method according to claim 1 , wherein the determining, by the base station based on the MU weight of the first user equipment and the MU weights of the N second user equipments, that the first user equipment is to be paired with the N second user equipments comprises:

determining, by the base station, a modulation and coding scheme (MCS) of the first user equipment and MCSs of the N second user equipments based on the MU weight of the first user equipment and the MU weights of the N second user equipments; and

determining, by the base station based on the MCS of the first user equipment and the MCSs of the N second user equipments, that the first user equipment is to be paired with the N second user equipments.

5. The method according to claim 4 , wherein the determining, by the base station, an MCS of the first user equipment and MCSs of the N second user equipments based on the MU weight of the first user equipment and the MU weights of the N second user equipments comprises:

for each low-level user equipment:

determining, by the base station, whether the low-level user equipment is capable of eliminating an interference signal of another user equipment from a received signal to obtain a determining result; and

determining, by the base station, an MCS of the low-level user equipment based on the determining result, the MU weight of the first user equipment, and the MU weights of the N second user equipments.

6. The method according to claim 1 , wherein before the multiplexing, by the base station, a signal of the first user equipment and signals of the N second user equipments onto the first resource block, and sending the signals, the method further comprises:

sending, by the base station, a message to the first user equipment or at least one second user equipment, wherein the message comprises cancellation information of another user equipment, and the cancellation information comprises at least a modulation and coding scheme (MCS).

7. A base station, comprising:

a memory storing instructions; and

a processor coupled to the memory to execute the instructions to:

determine, based on receiver capabilities of user equipments, that a first user equipment is to be paired with N second user equipments on a first resource block, wherein N is a positive integer, comprising:

determining a multi-user (MU) weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the N second user equipments; and

determining, based on the MU weight of the first user equipment and the MU weights of the N second user equipments, that the first user equipment is to be paired with the N second user equipments, including: sorting the first user equipment and the N second user equipments in ascending order of the receiver capabilities, wherein 1 st user equipment to M th user equipment are high-level user equipments, and (M+1) th user equipment to (N+1) th user equipment are low-level user equipments;

multiplex a signal of the first user equipment and signals of the N second user equipments onto the first resource block; and

send the signals.

8. The base station according to claim 7 , wherein the processor executes the instructions to:

obtain MU weights of the high-level user equipments by performing mutual zero forcing between the M high-level user equipments; and

obtain MU weights of the low-level user equipments by performing mutual zero forcing between the first user equipment and the N second user equipments.

9. The base station according to claim 8 , wherein the MU weights of the low-level user equipments are obtained by performing mutual zero forcing between the first user equipment and the N second user equipments by using an MU weight calculation method, and the MU weight calculation method is determined based on service types of the low-level user equipments.

10. The base station according to claim 7 , wherein the processor executes the instructions to:

determine a modulation and coding scheme (MCS) of the first user equipment and MCSs of the N second user equipments based on the MU weight of the first user equipment and the MU weights of the N second user equipments; and

determine, based on the MCS of the first user equipment and the MCSs of the N second user equipments, that the first user equipment is to be paired with the N second user equipments.

11. The base station according to claim 10 , wherein the processor executes the instructions to:

for each low-level user equipment:

determine whether the low-level user equipment is capable of eliminating an interference signal of another user equipment from a received signal to obtain a determining result; and

determine an MCS of the low-level user equipment based on the determining result, the MU weight of the first user equipment, and the MU weights of the N second user equipments.

12. The base station according to claim 7 , wherein the processor executes the instructions to: before multiplexing the signal of the first user equipment and the signals of the N second user equipments onto the first resource block, and sending the signals, send a message to the first user equipment or at least one second user equipment, wherein the message comprises cancellation information of another user equipment, and the cancellation information comprises at least a modulation and coding scheme (MCS).

13. A non-transitory computer readable medium comprising computer program codes stored thereon, executable by one or more digital processors for sending signal, the computer program codes including:

instructions for determining based on receiver capabilities of user equipments, that a first user equipment is to be paired with N second user equipments on a first resource block, wherein N is a positive integer, including instructions for:

determining a multi-user (MU) weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the N second user equipments; and

determining based on the MU weight of the first user equipment and the MU weights of the N second user equipments, that the first user equipment is to be paired with the N second user equipments, including: sorting the first user equipment and the N second user equipments in ascending order of the receiver capabilities, wherein 1 st user equipment to M th user equipment are high-level user equipments, and (M+1) th user equipment to (N+1) th user equipment are low-level user equipments; and

instructions for multiplexing a signal of the first user equipment and signals of the N second user equipments onto the first resource block; and

instructions for sending the signals.

14. The non-transitory computer readable medium according to claim 13 , wherein the instructions for determining a MU weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the second user equipments comprise:

instructions for obtaining MU weights of the high-level user equipments by performing mutual zero forcing between the M high-level user equipments; and

instructions for obtaining MU weights of the low-level user equipments by performing mutual zero forcing between the first user equipment and the N second user equipments.

15. The non-transitory computer readable medium according to claim 14 , wherein

the MU weights of the low-level user equipments are obtained by performing mutual zero forcing between the first user equipment and the N second user equipments by using an MU weight calculation method, wherein

the MU weight calculation method is determined based on service types of the low-level user equipments.

16. The non-transitory computer readable medium according to claim 13 , wherein the instructions for determining a MU weight of the first user equipment and MU weights of the N second user equipments based on a receiver capability of the first user equipment and receiver capabilities of the second user equipments comprise:

instructions for determining a modulation and coding scheme (MCS) of the first user equipment and MCSs of the N second user equipments based on the MU weight of the first user equipment and the MU weights of the N second user equipments; and

instructions for determining based on the MCS of the first user equipment and the MCSs of the N second user equipments, that the first user equipment is to be paired with the N second user equipments.

17. The non-transitory computer readable medium according to claim 13 , wherein the computer program codes include:

instructions for sending a message to the first user equipment or at least one second user equipment, wherein the message comprises cancellation information of another user equipment, and the cancellation information comprises at least a modulation and coding scheme (MCS).