Method and device in wireless communication

1. A method in a User Equipment (UE) for low latency, comprising:

receiving a first signaling;

receiving a second signaling; and

receiving 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.

2. The method according to claim 1 , wherein the second signaling indicates whether the target time-frequency resources comprise the first time-frequency resources, and the first time-frequency resources are common parts of the first resource pool and the second time-frequency resources.

3. The method according to claim 1 , wherein the first time-frequency resources comprise H subcarriers in frequency domain, the H is a positive integer, and the H is a multiple of 12, the second time-frequency resources include J subcarriers in frequency domain, wherein the J is a positive integer, and the J is a multiple of 12, the second time-frequency resources are consecutive in time domain.

4. The method according to claim 1 , wherein the second signaling is used for determining a first time-frequency pattern from P time-frequency pattern(s), the P is a positive integer, the first time-frequency pattern is a time-frequency location distribution of the first time-frequency resources in the first resource pool; and the P time-frequency pattern(s) is(are) predefined, or the P time-frequency pattern(s) is(are) configurable.

5. The method according to claim 1 , further comprising:

receiving a third signaling;

wherein the third signaling is used for determining frequency-domain resources that can be occupied in the first time interval; and the target time-frequency resources, the first time-frequency resources, and the second time-frequency resources all belong to the frequency-domain resources that can be occupied in the first time interval.

6. 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.

7. The method according to claim 6 , wherein the second signaling indicates whether the target time-frequency resources comprise the first time-frequency resources, and the first time-frequency resources are common parts of the first resource pool and the second time-frequency resources.

8. The method according to claim 6 , wherein the first time-frequency resources comprise H subcarriers in frequency domain, the H is a positive integer, and the H is a multiple of 12, the second time-frequency resources include J subcarriers in frequency domain, wherein the J is a positive integer, and the J is a multiple of 12, the second time-frequency resources are consecutive in time domain.

9. The method according to claim 6 , wherein the second signaling is used for determining a first time-frequency pattern from P time-frequency pattern(s), the P is a positive integer, the first time-frequency pattern is a time-frequency location distribution of the first time-frequency resources in the first resource pool; and the P time-frequency pattern(s) is(are) predefined, or the P time-frequency pattern(s) is(are) configurable.

10. The method according to claim 6 , further comprising:

determining a second bit block;

wherein the first bit block is channel encoded then rate matched according to the target time-frequency resources to generate the second bit block, and the second bit block comprises a positive integer number of bit(s).

11. 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.

12. The UE according to claim 11 , wherein the second signaling indicates whether the target time-frequency resources comprise the first time-frequency resources, and the first time-frequency resources are common parts of the first resource pool and the second time-frequency resources.

13. The UE according to claim 11 , wherein the first time-frequency resources comprise H subcarriers in frequency domain, the H is a positive integer, and the H is a multiple of 12, the second time-frequency resources include J subcarriers in frequency domain, wherein the J is a positive integer, and the J is a multiple of 12, the second time-frequency resources are consecutive in time domain.

14. The UE according to claim 11 , wherein the second signaling is used for determining a first time-frequency pattern from P time-frequency pattern(s), the P is a positive integer, the first time-frequency pattern is a time-frequency location distribution of the first time-frequency resources in the first resource pool; and the P time-frequency pattern(s) is(are) predefined, or the P time-frequency pattern(s) is(are) configurable.

15. The UE according to claim 11 , wherein the first receiver further receives a third signaling; the third signaling is used for determining frequency-domain resources that can be occupied in the first time interval; and the target time-frequency resources, the first time-frequency resources, and the second time-frequency resources all belong to the frequency-domain resources that can be occupied in the first time interval.

16. A base station for low latency, comprising:

a first transmitter, to transmit a first signaling;

a second transmitter, to transmit a second signaling; and

a third transmitter, to transmit 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.

17. The base station according to claim 16 , wherein the second signaling indicates whether the target time-frequency resources comprise the first time-frequency resources, and the first time-frequency resources are common parts of the first resource pool and the second time-frequency resources.

18. The base station according to claim 16 , wherein the first time-frequency resources comprise H subcarriers in frequency domain, the H is a positive integer, and the H is a multiple of 12, the second time-frequency resources include J subcarriers in frequency domain, wherein the J is a positive integer, and the J is a multiple of 12, the second time-frequency resources are consecutive in time domain.

19. The base station according to claim 16 , wherein the second signaling is used for determining a first time-frequency pattern from P time-frequency pattern(s), the P is a positive integer, the first time-frequency pattern is a time-frequency location distribution of the first time-frequency resources in the first resource pool; and the P time-frequency pattern(s) is(are) predefined, or the P time-frequency pattern(s) is(are) configurable.

20. The base station according to claim 16 , wherein the third transmitter further determines a second bit block; the first bit block is channel encoded then rate matched according to the target time-frequency resources to generate the second bit block, and the second bit block comprises a positive integer number of bit(s).