Method and device for multi-antenna transmission in UE and base station

A method for multi-antenna transmission in a base station, comprising:

• transmitting, by the base station, a first signaling to a user equipment (UE);
• transmitting, by the base station, a first wireless signal to the UE;
• and
• receiving, by the base station, first information from the UE;
• wherein, K antenna port groups of the base station are used to transmit the first wireless signal;
• the first signaling is used by the UE to determine the K antenna port groups transmitting the first wireless signal received by the UE;
• the K is a positive integer greater than 1;
• the K antenna port groups respectively correspond to K channel quality values;
• the K channel quality values are K non-negative real numbers;
• the K channel quality values are Reference Signal Received Powers (RSRPs) or Signal to Interference plus Noise Ratios (SINRs);
• K1 antenna port groups of the K antenna port groups correspond to K1 channel quality values of the K channel quality values;
• the K1 is a positive integer less than or equal to the K;
• a first proportional sequence corresponds to a ratio(ratios) among the K1 channel quality values;
• the first information is used to determine the K1 antenna port groups and the first proportional sequence;
• the first signaling is used to determine a target threshold;
• the target threshold is a non-negative real number;
• a first channel quality is a best channel quality value among the K1 channel quality values;
• a second channel quality is a worse channel quality value among the K1 channel quality values;
• a ratio between the second channel quality and the first channel quality is greater than or equal to the target threshold.

A user equipment (UE) for multi-antenna transmission comprising:

• a first receiver at the UE, receiving a first signaling originating from a base station;
• a second receiver at the UE, receiving a first wireless signal originating from the base station;
• and
• a third transmitter at the UE, transmitting first information to the base station;
• wherein, K antenna port groups of the base station are used to transmit the first wireless signal;
• the first signaling is used by the UE to determine the K antenna port groups transmitting the first wireless signal received by the UE;
• the K is a positive integer greater than 1;
• the K antenna port groups respectively correspond to K channel quality values;
• the K channel quality values are K non-negative real numbers;
• the K channel quality values are Reference Signal Received Powers (RSRPs) or Signal to Interference plus Noise Ratios (SINRs);
• K1 antenna port groups of the K antenna port groups correspond to K1 channel quality values of the K channel quality values;
• the K1 is a positive integer less than or equal to the K;
• a first proportional sequence corresponds to a ratio(ratios) among the K1 channel quality values;
• the first information is used to determine the K1 antenna port groups and the first proportional sequence;
• the first signaling is used to determine a target threshold;
• the target threshold is a non-negative real number;
• a first channel quality is a best channel quality value among the K1 channel quality values;
• a second channel quality is a worse channel quality value among the K1 channel quality values;
• a ratio between the second channel quality and the first channel quality is greater than or equal to the target threshold.

A base station for multi-antenna transmission comprising:

• a first transmitter at the base station, transmitting a first signaling to a user equipment (UE);
• a second transmitter at the base station, transmitting a first radio signal to the UE;
• and
• a third receiver at the base station, receiving first information from the UE;
• wherein, K antenna port groups of the base station are used to transmit the first wireless signal;
• the first signaling is used by the UE to determine the K antenna port groups transmitting the first wireless signal received by the UE;
• the K is a positive integer greater than 1;
• the K antenna port groups respectively correspond to K channel quality values;
• the K channel quality values are K non-negative real numbers;
• the K channel quality values are Reference Signal Received Powers (RSRPs) or Signal to Interference plus Noise Ratios (SINRs);
• K1 antenna port groups of the K antenna port groups correspond to K1 channel quality values of the K channel quality values;
• the K1 is a positive integer less than or equal to the K;
• a first proportional sequence corresponds to a ratio(ratios) among the K1 channel quality values;
• the first information is used to determine the K1 antenna port groups and the first proportional sequence;
• the first signaling is used to determine a target threshold;
• the target threshold is a non-negative real number;
• a first channel quality is a best channel quality value among the K1 channel quality values;
• a second channel quality is a worse channel quality value among the K1 channel quality values;
• a ratio between the second channel quality and the first channel quality is greater than or equal to the target threshold.