Beam sweeping method for multiple transmitting beams based on priori information

An electronic device for a second communication device side including:

• processing circuitry configured to:
• measure a reference signal transmitted by a first communication device, the first communication device transmitting a plurality of transmitting beams in beam sweeping to be performed on a communication from the first communication device to the second communication device;
• and
• in the case that a reception quality for the measured reference signal is above a predetermined threshold for the first time, feedback, to the first communication device, feedback information indicating a first transmitting beam in the plurality of transmitting beams of the first communication device corresponding to the reference signal for which the reception quality is above the predetermined threshold,
• wherein the beam sweeping is stopped at the first communication device when the feedback information is obtained from the second communication device,
• wherein the feedback information includes at least one of:
• information indicating an index of the first transmitting beam, information indicating the transmitting order of the first transmitting beam, information indicating an antenna port corresponding to the first transmitting beam, and a Channel State Information Reference Signal (CSI-RS) resource indicator indicating the first transmitting beam,
• wherein, when the first transmitting beam cannot be normally used, a second transmitting beam in the plurality of transmitting beams, whose transmitting order is higher than that of the first transmission beam, is used as a backup transmitting beam in beam switching, and
• wherein a reception quality for the second transmitting beam is the second best among those for the plurality of transmitting beams and is below that for the first transmitting beam.

A communication method including:

• determining, by a first communication device, based on priori information, a transmitting order for a plurality of transmitting beams of the first communication device in beam sweeping to be performed on a communication from the first communication device to a second communication device;
• controlling, by the first communication device, to use the plurality of transmitting beams in the beam sweeping according to the determined transmitting order,
• obtaining feedback information from the second communication device, the feedback information indicating a first transmitting beam in the plurality of transmitting beams of the first communication device, wherein a reception quality of the second communication device for a reference signal transmitted by the first transmitting beam is higher than a predetermined threshold;
• control to use the first transmitting beam in the data transmission of the communication,
• wherein the beam sweeping is stopped when the feedback information is obtained from the second communication device,
• wherein the feedback information includes at least one of:
• information indicating an index of the first transmitting beam, information indicating the transmitting order of the first transmitting beam, information indicating an antenna port corresponding to the first transmitting beam, and a Channel State Information Reference Signal (CSI-RS) resource indicator indicating the first transmitting beam,
• wherein, when the first transmitting beam cannot be normally used, a second transmitting beam in the plurality of transmitting beams, whose transmitting order is higher than that of the first transmission beam, is used as a backup transmitting beam in beam switching, and
• wherein a reception quality for the second transmitting beam is the second best among those for the plurality of transmitting beams and is below that for the first transmitting beam.