Beamforming method and device based on phase shifter switching control, and system

A beamforming device based on phase shifter switching control, comprising:

• a channel vector acquisition module configured to acquire a channel vector of a channel of each of low-load terminals, the channel being a channel at a low-load side of the low-load terminal;
• a contribution degree acquisition module configured to acquire, based on the channel vector, contribution degrees of phase shifters corresponding to the channel, wherein there are a plurality of the phase shifters corresponding to the channel, and the phase shifters are located in a base station (BS);
• a phase shifter switching-off module configured to sequentially change a connected state of each of the phase shifters from closing to opening based on the contribution degrees of the phase shifters corresponding to the channel, calculate a to-be-processed signal-to-interference-plus-noise ratio (SINR) of the low-load terminal after changing the connected state of the phase shifter once, stop to change the connected state of the phase shifter if the to-be-processed SINR meets a preset condition, and change the connected state of the phase shifter meeting the preset condition to the closing;
• and
• a width adjustment module configured to adjust, with at least one phase shifter having the connected state in the closing, a width of a beam corresponding to the low-load terminal, the beam being formed by an electromagnetic wave transmitted from the BS to the low-load terminal or an electromagnetic wave received from the low-load terminal.

A wireless communication system, comprising low-load terminals, a plurality of phase shifters, a base station (BS), and a beamforming device based on phase shifter switching control, wherein

• the low-load terminals each are configured to transmit an electromagnetic wave to the BS, or receive an electromagnetic wave from the BS;
• the plurality of phase shifters are located in the BS, and configured to adjust a width of a beam, the beam being formed by the electromagnetic wave transmitted from the low-load terminal to the BS or the electromagnetic wave from the BS, and
• the beamforming device based on phase shifter switching control comprises a channel vector acquisition module, a contribution degree acquisition module, a phase shifter switching-off module, and a width adjustment module, wherein
• the channel vector acquisition module is configured to acquire a channel vector of a channel of the low-load terminal, the channel being a channel at a low-load side of the low-load terminal;
• the contribution degree acquisition module configured to acquire, based on the channel vector, contribution degrees of phase shifters corresponding to the channel, wherein there are a plurality of the phase shifters corresponding to the channel;
• the phase shifter switching-off module is configured to sequentially change a connected state of each of the phase shifters from closing to opening based on the contribution degrees of the phase shifters corresponding to the channel, calculate a to-be-processed signal-to-interference-plus-noise ratio (SINR) of the low-load terminal after changing the connected state of the phase shifter once, stop to change the connected state of the phase shifter if the to-be-processed SINR meets a preset condition, and change the connected state of the phase shifter meeting the preset condition to the closing;
• and
• the width adjustment module is configured to adjust, with at least one phase shifter having the connected state in the closing, the width of the beam corresponding to the low-load terminal, the beam being formed by the electromagnetic wave transmitted from the BS to the low-load terminal or the electromagnetic wave received from the low-load terminal.