Method and device in wireless communication

A method in a base station for low latency, comprising:

• transmitting a second signaling;
• transmitting a first signaling;
• and
• transmitting a first radio signal on target time-frequency resources;
• wherein first time-frequency resources and the target time-frequency resources are orthogonal, or the target time-frequency resources comprise the first time-frequency resources;
• time-frequency resources among second time-frequency resources other than the first time-frequency resources belong to the target time-frequency resources, and the second signaling is used for determining the first time-frequency resources and the second time-frequency resources;
• the target time-frequency resources belong to a first time interval in time domain, and the first time interval has a duration less than 1 millisecond;
• the first radio signal carries a first bit block, the first bit block comprises a positive integer number of bit(s), and the first bit block is transmitted on the target time-frequency resources;
• the first signaling is used for determining a first resource pool, the first resource pool comprises the first time-frequency resources, and the first resource pool is reserved to downlink physical layer signaling(s);
• the second signaling includes scheduling information of the first radio signal, and the scheduling information includes at least one of a Resource Allocation (RA), a Modulation and Coding Scheme (MCS), a New Data Indicator (NDI), a Redundancy Version (RV) and a HARQ process number;
• the first signaling is transmitted through RRC, the second signaling is transmitted through DCI, a transport channel corresponding to the first radio signal is a Downlink Shared Channel (DL-SCH) mapped within the first time interval;
• the target time-frequency resources are parts of the second time-frequency resources or the target time-frequency resources are the same as the second time-frequency resources.

A UE for low latency, comprising:

• a first receiver, to receive a first signaling;
• a second receiver, to receive a second signaling;
• and
• a third receiver, to receive a first radio signal on target time-frequency resources;
• wherein first time-frequency resources and the target time-frequency resources are orthogonal, or the target time-frequency resources comprise the first time-frequency resources;
• time-frequency resources among second time-frequency resources other than the first time-frequency resources belong to the target time-frequency resources, and the second signaling is used for determining the first time-frequency resources and the second time-frequency resources;
• the target time-frequency resources belong to a first time interval in time domain, and the first time interval has a duration less than 1 millisecond;
• the first radio signal carries a first bit block, the first bit block comprises a positive integer number of bit(s), and the first bit block is transmitted on the target time-frequency resources;
• the first signaling is used for determining a first resource pool, the first resource pool comprises the first time-frequency resources, and the first resource pool is reserved to downlink physical layer signaling(s);
• the second signaling includes scheduling information of the first radio signal, and the scheduling information includes at least one of a Resource Allocation (RA), a Modulation and Coding Scheme (MCS), a New Data Indicator (NDI), a Redundancy Version (RV) and a HARQ process number;
• the first signaling is transmitted through RRC, the second signaling is transmitted through DCI, a transport channel corresponding to the first radio signal is a Downlink Shared Channel (DL-SCH) mapped within the first time interval;
• the target time-frequency resources are parts of the second time-frequency resources or the target time-frequency resources are the same as the second time-frequency resources.