Beam processing method, base station, and mobile terminal

1. A beam processing method for use in a base station, comprising:

transmitting a first downlink transmission beam training signal to a User Equipment (UE), and receiving first recommended beam-related information reported by the UE in accordance with the first downlink transmission beam training signal;

transmitting a second downlink transmission beam training signal to the UE, and receiving second recommended beam-related information reported by the UE in accordance with the second downlink transmission beam training signal;

determining a target downlink transmission beam in accordance with the first recommended beam-related information and the second recommended beam-related information; and

performing a switching operation on one or more currently-adopted valid downlink transmission beams in accordance with the target downlink transmission beam,

wherein the transmitting the first downlink transmission beam training signal to the UE and receiving the first recommended beam-related information reported by the UE in accordance with the first downlink transmission beam training signal comprises:

determining a first set comprising a plurality of downlink transmission beams, each downlink transmission beam corresponding to a group of beamforming weight values;

beamforming each downlink transmission beam in the first set in accordance with a corresponding beamforming weight value, so as to acquire the first downlink transmission beam training signal;

transmitting the first downlink transmission beam training signal to the UE, so as to enable the UE to determine a first recommended beam in accordance with a predetermined measurement index for the first downlink transmission beam training signal, and enable the UE to determine a downlink reception beam corresponding to the first recommended beam or each downlink transmission beam in the first set; and

receiving the first recommended beam-related information reported by the UE.

2. The beam processing method according to claim 1 , wherein the transmitting the second downlink transmission beam training signal to the UE and receiving the second recommended beam-related information reported by the UE in accordance with the second downlink transmission beam training signal comprises:

determining a second set comprising a plurality of downlink transmission beams associated with the valid downlink transmission beam, each downlink transmission beam corresponding to a group of beamforming weight values;

beamforming each downlink transmission beam in the second set in accordance with a corresponding beamforming weight value, so as to acquire the second downlink transmission beam training signal;

transmitting the second downlink transmission beam training signal to the UE, so as to enable the UE to determine a second recommended beam in accordance with a predetermined measurement index for the second downlink transmission beam training signal; and

receiving the second recommended beam-related information reported by the UE.

3. The beam processing method according to claim 2 , wherein a spatial correlation between each downlink transmission beam in the second set and the valid downlink transmission beam is greater than a predetermined threshold; or an angle difference between a spatial orientation of each downlink transmission beam in the second set and a spatial orientation of the valid downlink transmission beam is within a predetermined range; or the second set is a predefined set corresponding to the valid downlink transmission beam.

4. The beam processing method according to claim 2 , wherein the second downlink transmission beam training signal and a training signal acquired after beamforming the valid downlink transmission beam in accordance with the corresponding beamforming weight value are quasi co-located (QCL) with respect to one or more spatial angle parameters.

5. The beam processing method according to claim 2 , wherein the performing the switching operation on the currently-adopted valid downlink transmission beam in accordance with the target downlink transmission beam comprises:

when the target downlink transmission beam is different from the valid downlink transmission beam, determining whether the target downlink transmission beam is comprised in the second set;

when the target downlink transmission beam is comprised in the second set, switching the valid downlink transmission beam into the target downlink transmission beam; and

when the target downlink transmission beam is not comprised in the second set, transmitting a downlink transmission beam switching notification message to the UE so as to enable the UE to update information about the valid downlink transmission beam stored in the UE in accordance with the downlink transmission beam switching notification message, and switch the valid downlink transmission beam into the target downlink transmission beam.

6. The beam processing method according to claim 5 , wherein the downlink transmission beam switching notification message comprises one or more of identification information about the target downlink transmission beam, information about a time interval, or indication information about a valid time-domain resource.

7. The beam processing method according to claim 2 , wherein the first recommended beam-related information comprises one or more of identification information about the first recommended beam, downlink time information, downlink frequency information, and intensity information about the first downlink transmission beam training signal; and

the second recommended beam-related information comprises one or more of identification information about the second recommended beam, downlink time information, downlink frequency information, and intensity information about the second downlink transmission beam training signal.

8. The beam processing method according to claim 1 , further comprising transmitting a downlink reception beam training signal to the UE, so as to enable the UE to determine a target downlink reception beam in accordance with a predetermined measure index for the downlink reception beam training signal, and enable the UE to perform a switching operation on a currently-adopted valid downlink reception beam in accordance with the target downlink reception beam.

9. The beam processing method according to claim 8 , wherein the downlink reception beam training signal and the training signal acquired after beamforming the valid downlink transmission beam in accordance with the corresponding beamforming weight value are quasi co-located (QCL) with respect to one or more spatial angle parameters.

10. A base station, comprising a processor, a transceiver and a memory, wherein the processor is configured to read a program stored in the memory, so as to: transmit through the transceiver a first downlink transmission beam training signal to a UE, and receive first recommended beam-related information reported by the UE in accordance with the first downlink transmission beam training signal; transmit through the transceiver a second downlink transmission beam training signal to the UE, and receive second recommended beam-related information reported by the UE in accordance with the second downlink transmission beam training signal; determine a target downlink transmission beam in accordance with the first recommended beam-related information and the second recommended beam-related information; and perform a switching operation on one or more currently-adopted valid downlink transmission beams in accordance with the target downlink transmission beam,

wherein the processor is further configured to:

determine a first set comprising a plurality of downlink transmission beams, each downlink transmission beam corresponding to a group of beamforming weight values;

beamform each downlink transmission beam in the first set in accordance with a corresponding beamforming weight value, so as to acquire the first downlink transmission beam training signal;

transmit the first downlink transmission beam training signal to the UE, so as to enable the UE to determine a first recommended beam in accordance with a predetermined measurement index for the first downlink transmission beam training signal, and enable the UE to determine a downlink reception beam corresponding to the first recommended beam or each downlink transmission beam in the first set; and

receive the first recommended beam-related information reported by the UE.