Method and device for acquiring and feeding back transmission beam information

A method for feeding back transmitting beam information, comprising:

• receiving, by a terminal, reference signals transmitted by a base station using downlink transmitting beams, wherein the base station transmits one of the reference signals for each of the downlink transmitting beams, the reference signal of each of the downlink transmitting beams is transmitted after the downlink transmitting beam is formed using a beamforming weight corresponding to the downlink transmitting beam, and reference signals transmitted using downlink transmitting beams in a same group of beams are grouped into a set of reference signals;
• selecting, by the terminal, Q reference signals from the received reference signals according to reception qualities thereof, and determining a receiving beam of each of the Q reference signals, wherein Q is an integer equal to more than 1;
• and
• receiving, by the terminal, information about the sets of reference signals transmitted by the base station, selecting a combination of downlink transmitting beams according to the information about the sets of reference signals, and reporting the combination of downlink transmitting beams to the base station.

A base station, comprising a processor, a transceiver, and a memory, wherein the processor is configured to read a program in the memory to perform following operations:

• transmitting, via the transceiver, reference signals to a terminal using downlink transmitting beams, wherein one of the reference signals is transmitted for each of the downlink transmitting beams, the reference signal of each of the downlink transmitting beams is transmitted after the downlink transmitting beam is formed using a beamforming weight corresponding to the downlink transmitting beam, and reference signals transmitted using downlink transmitting beams in a same group of downlink transmitting beams are grouped into a set of reference signals;
• transmitting, via the transceiver, information about the sets of reference signals to the terminal;
• receiving, via the transceiver, a combination of downlink transmitting beams reported by the terminal;
• and
• determining a downlink transmitting beam for transmitting data to the terminal, according to the combination of downlink transmitting beams;
• wherein the transceiver is configured to transmit and receive data under control of the processor.

A terminal, comprising a processor, a transceiver, and a memory, wherein:

• the processor is configured to read a program in the memory to perform following operations:
• receiving, via the transceiver, reference signals transmitted by a base station using downlink transmitting beams, wherein the base station transmits one of the reference signals for each of the downlink transmitting beams, the reference signal of each of the downlink transmitting beams is transmitted after the downlink transmitting beam is formed using a beamforming weight corresponding to the downlink transmitting beam, and reference signals transmitted using downlink transmitting beams in a same group of beams are grouped into a set of reference signals;
• selecting Q reference signals from the received reference signals according to reception qualities thereof, and determining a receiving beam of each of the Q reference signals, wherein Q is an integer equal to more than 1;
• and
• receiving, via the transceiver, information about the sets of reference signals transmitted by the base station, selecting a combination of downlink transmitting beams according to the information about the sets of reference signals, and reporting the combination of downlink transmitting beams to the base station;
• wherein the transceiver is configured to transmit and receive data under control of the processor.