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 time interval includes R consecutive time-domain OFDM symbols, the OFDM symbols include cyclic prefixes, and R is a positive integer, the first time-frequency resources belong to the first time interval in time domain, the second signaling is transmitted in 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 4 , wherein the P time-frequency pattern(s) belongs(belong) to the first resource pool, the P time-frequency pattern(s) is(are) configured through the first signaling; the P time-frequency pattern(s) corresponds(correspond) to P frequency offset(s), and frequency starting point(s) of the P frequency offset(s) is(are) predefined.

6. The method according to claim 1 , wherein the first time-frequency resources are used for transmitting at least one of L signaling(s), the L is a positive integer, and the L signaling(s) includes the second signaling.

7. 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.

8. 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 time interval includes R consecutive time-domain OFDM symbols, the OFDM symbols include cyclic prefixes, and R is a positive integer, the first time-frequency resources belong to the first time interval in time domain, the second signaling is transmitted in the first time interval.

9. The method according to claim 8 , 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.

10. The method according to claim 8 , 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.

11. The method according to claim 8 , 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.

12. The method according to claim 11 , wherein the P time-frequency pattern(s) belongs(belong) to the first resource pool, the P time-frequency pattern(s) is(are) configured through the first signaling; the P time-frequency pattern(s) corresponds(correspond) to P frequency offset(s), and frequency starting point(s) of the P frequency offset(s) is(are) predefined.

13. The method according to claim 8 , 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).

14. 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 time interval includes R consecutive time-domain OFDM symbols, the OFDM symbols include cyclic prefixes, and R is a positive integer, the first time-frequency resources belong to the first time interval in time domain, the second signaling is transmitted in the first time interval.

15. The UE according to claim 14 , 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.

16. The UE according to claim 14 , 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.

17. The UE according to claim 14 , 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.

18. The UE according to claim 17 , wherein the P time-frequency pattern(s) belongs(belong) to the first resource pool, the P time-frequency pattern(s) is(are) configured through the first signaling; the P time-frequency pattern(s) corresponds(correspond) to P frequency offset(s), and frequency starting point(s) of the P frequency offset(s) is(are) predefined.

19. The UE according to claim 14 , wherein the first time-frequency resources are used for transmitting at least one of L signaling(s), the L is a positive integer, and the L signaling(s) includes the second signaling.

20. The UE according to claim 14 , 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.