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

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

• transmitting a first higher-layer signaling, the first higher-layer signaling is an RRCReconfiguration signaling;
• transmitting a first-type physical layer signaling in a first radio resource pool;
• and
• transmitting second downlink information in a second radio resource pool;
• the second downlink information is a PDCCH;
• wherein the first higher-layer signaling is used, by a receiving site, for determining first information and second information, and the first information is used, by the receiving site, for multi-antenna related receiving in the first radio resource pool;
• wherein when the first-type physical layer signaling is detected by the receiving site, the first-type physical layer signaling is used, by the receiving site, for multi-antenna related receiving in the second radio resource pool, and when the first-type physical layer signaling is not detected by the receiving site, the second information is used, by the receiving site, for multi-antenna related receiving in the second radio resource pool;
• and the second radio resource pool is related to the first radio resource pool;
• the second radio resource pool and the first radio resource pool are orthogonal in time domain;
• the first radio resource pool and the second radio resource pool each include multiple Resource Elements;
• the first information is used, by the receiving site, for determining a first antenna port group, the second information is used, by the receiving site, for determining a second antenna port group, the first antenna port group and the second antenna port group each comprise a positive integer number of antenna port(s);
• the first-type physical layer signaling is used, by the receiving site, for determining a third antenna port group, the third antenna port group comprises a positive integer number of antenna port(s);
• the first information, in combination with other physical layer or Medium Access Control (MAC) layer information, is used for determining the first antenna port group;
• wherein, the first-type physical layer signaling is a PDCCH;
• or, the first radio resource pool consists of K radio resource subpools, any two of the K radio resource subpools are orthogonal in time domain, the first antenna port group consists of K antenna port subsets, and the K antenna port subsets are used for determining receiving beamforming in the K radio resource subpools respectively, the K is a positive integer greater than 1.

A UE for multi-antenna transmission, comprising:

• a first receiver, to receive a first higher-layer signaling, the first higher-layer signaling is an RRCReconfiguration signaling;
• a second receiver, to monitor a first-type physical layer signaling in a first radio resource pool;
• and
• a third receiver, to receive second downlink information in a second radio resource pool;
• the second downlink information is a PDCCH;
• wherein the first higher-layer signaling is used, by the UE, for determining first information and second information, and the first information is used, by the UE, for multi-antenna related receiving in the first radio resource pool;
• wherein when the first-type physical layer signaling is detected by the UE, the first-type physical layer signaling is used, by the UE, for multi-antenna related receiving in the second radio resource pool, and when the first-type physical layer signaling is not detected by the UE, the second information is used, by the UE, for multi-antenna related receiving in the second radio resource pool;
• and the second radio resource pool is related to the first radio resource pool;
• the second radio resource pool and the first radio resource pool are orthogonal in time domain;
• the first radio resource pool and the second radio resource pool each include multiple Resource Elements;
• the first information is used, by the UE, for determining a first antenna port group, the second information is used, by the UE, for determining a second antenna port group, the first antenna port group and the second antenna port group each comprise a positive integer number of antenna port(s);
• the first-type physical layer signaling is used, by the UE, for determining a third antenna port group, the third antenna port group comprises a positive integer number of antenna port(s);
• the first information, in combination with other physical layer or Medium Access Control (MAC) layer information, is used for determining the first antenna port group;
• wherein when the first-type physical layer signaling is not detected by the UE, the UE assumes that an antenna port group used for transmitting the second downlink information is QCLed with the second antenna port group;
• or, when the first-type physical layer signaling is not detected by the UE, the second antenna port group is used for determining receiving beamforming in the second radio resource pool.

A base station for multi-antenna transmission, comprising:

• a first transmitter, to transmit a first higher-layer signaling, the first higher-layer signaling is an RRCReconfiguration signaling;
• a second transmitter, to transmit a first-type physical layer signaling in a first radio resource pool;
• and
• a third transmitter, to transmit second downlink information in a second radio resource pool;
• the second downlink information is a PDCCH;
• wherein the first higher-layer signaling is used, by a receiving site, for determining first information and second information, and the first information is used, by the receiving site, for multi-antenna related receiving in the first radio resource pool;
• wherein when the first-type physical layer signaling is detected by the receiving site, the first-type physical layer signaling is used, by the receiving site, for multi-antenna related receiving in the second radio resource pool, and when the first-type physical layer signaling is not detected by the receiving site, and the second information is used, by the receiving site, for multi-antenna related receiving in the second radio resource pool;
• and the second radio resource pool is related to the first radio resource pool;
• the second radio resource pool and the first radio resource pool are orthogonal in time domain;
• the first radio resource pool and the second radio resource pool each include multiple Resource Elements;
• the first information is used, by the receiving site, for determining a first antenna port group, the second information is used, by the receiving site, for determining a second antenna port group, the first antenna port group and the second antenna port group each comprise a positive integer number of antenna port(s);
• the first-type physical layer signaling is used, by the receiving site, for determining a third antenna port group, the third antenna port group comprises a positive integer number of antenna port(s);
• the first information, in combination with other physical layer or Medium Access Control (MAC) layer information, is used for determining the first antenna port group;
• wherein, the first-type physical layer signaling is a PDCCH;
• or, the first radio resource pool consists of K radio resource subpools, any two of the K radio resource subpools are orthogonal in time domain, the first antenna port group consists of K antenna port subsets, and the K antenna port subsets are used for determining receiving beamforming in the K radio resource subpools respectively, the K is a positive integer greater than 1.