Method and device for wireless communication

1. A method for synchronization in a base station, comprising:

transmitting a first radio signal on first frequency-domain resources in a first time window, the first radio signal is a Primary Synchronization Signal (PSS), the first radio signal is generated by a pseudo-random sequence; and

transmitting a first signaling, the first signaling is carried by Secondary Synchronization Signal (SSS);

wherein a center frequency of the first frequency-domain resources is a first frequency; the first frequency-domain resources include X subcarrier(s); the X is a positive integer; a carrier to which the first frequency-domain resources belong is a first carrier, a transmission bandwidth of the first carrier is variable, the first carrier includes transmission frequency-domain resources and guard frequency-domain resources; a frequency band to which the first carrier belongs is a first frequency band, a center frequency of the first carrier is a second frequency, the first frequency band is a Time Division Duplexing (TDD) frequency band; an interval between the first frequency and the second frequency in frequency domain is a first frequency interval; the first frequency interval is related to a subcarrier spacing of the X subcarrier(s), which means that the first frequency interval is linearly related to a subcarrier spacing of the X subcarrier(s); the first radio signal is used to determine at least one of a location of the first time window in time domain or the first frequency; the first radio signal is broadcast; or the first radio signal is multicast; the first signaling is used to determine a cell ID of a transmitter of the first radio signal in the first carrier; the first frequency interval belongs to a target frequency interval set; the target frequency interval set includes a positive integer number of frequency interval(s); a subcarrier spacing of the X subcarrier(s) and a location of the first frequency band in frequency domain are used to determine the target frequency interval set out of Y frequency interval sets, a subcarrier spacing of the X subcarrier(s) is one of 15 kHz, 30 kHz, 120 kHz, 240 kHz or 480 kHz; and the Y is a positive integer; the first frequency domain resources are contiguous in the frequency domain, the first time window includes W consecutive OFDM symbols in time domain, W being a positive integer.

2. The method according to claim 1 , wherein each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of a unit frequency interval, a first frequency offset; or each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of the unit frequency interval, half of the unit frequency interval, the first frequency offset; the unit frequency interval is equal to 12 times of a first subcarrier spacing; a subcarrier spacing of each subcarrier in the X subcarrier(s) is equal to the first subcarrier spacing; the first frequency offset is a non-negative number that is less than half of the unit frequency interval; the first frequency offset is configurable; or the first frequency offset is a predefined fixed value; the unit frequency interval is equal to a width of a Physical Resource Block (PRB) in frequency domain.

3. The method according to claim 1 , wherein a frequency interval between the first frequency and a lowest frequency of the first frequency band is equal to a sum of P times of a first raster and a second frequency offset; the P is a positive integer; the first raster is determined by a location of the first frequency band in frequency domain; the second frequency offset is equal to a first threshold; the first threshold is a non-negative number; the first threshold is smaller than the first raster; the first threshold is determined by at least one of a location of the first frequency band in frequency domain, or a subcarrier spacing of the X subcarrier(s); the first raster is equal to a positive integer number of 100 kHz.

4. The method according to claim 1 , wherein a frequency interval between the second frequency and a lowest frequency of the first frequency band is equal to a sum of Q times of a second raster and a third frequency offset; the Q is a positive integer; the second raster is determined by a location of the first frequency band in frequency domain; the third frequency offset is equal to a second threshold; the second threshold is a non-negative number; the second threshold is determined by at least one of a location of the first frequency band in frequency domain, or a subcarrier spacing of the X subcarrier(s).

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

transmitting a second signaling;

wherein the second signaling is used to determine a frequency interval other than the first frequency interval in the target frequency interval set, the second signaling is carried by a Physical Broadcast Channel (PBCH).

6. The method according to claim 1 , wherein the first frequency is at the center of one of the X subcarriers or the first frequency is at the boundary of two frequency-domain adjacent subcarriers in the X subcarriers.

7. A base station used for synchronization, comprising:

a first transmitter, transmitting a first radio signal on first frequency-domain resources in a first time window, the first radio signal is a Primary Synchronization Signal (PSS), the first radio signal is generated by a pseudo-random sequence; and

a second transmitter, transmitting a first signaling, the first signaling is carried by Secondary Synchronization Signal (SSS);

wherein a center frequency of the first frequency-domain resources is a first frequency; the first frequency-domain resources includes X subcarrier(s); the X is a positive integer; a carrier to which the first frequency-domain resources belong is a first carrier, a transmission bandwidth of the first carrier is variable, the first carrier includes transmission frequency-domain resources and guard frequency-domain resources; a frequency band to which the first carrier belongs is a first frequency band; a center frequency of the first carrier is a second frequency, the first frequency band is a Time Division Duplexing (TDD) frequency band; an interval between the first frequency and the second frequency in frequency domain is a first frequency interval; the first frequency interval is related to a subcarrier spacing of the X subcarrier(s)_, which means that the first frequency interval is linearly related to a subcarrier spacing of the X subcarrier(s); the first radio signal is used to determine at least one of a location of the first time window in time domain, or the first frequency; the first radio signal is broadcast; or the first radio signal is multicast; the first signaling is used to determine a cell ID of a transmitter of the first radio signal in the first carrier; the first frequency interval belongs to a target frequency interval set; the target frequency interval set includes a positive integer number of frequency interval(s); a subcarrier spacing of the X subcarrier(s) and a location of the first frequency band in frequency domain are used to determine the target frequency interval set out of Y frequency interval sets, a subcarrier spacing of the X subcarrier(s) is one of 15 kHz, 30 kHz, 120 kHz, 240 kHz or 480 kHz; and the Y is a positive integer; the first frequency domain resources are contiguous in the frequency domain, the first time window includes W consecutive OFDM symbols in time domain, W being a positive integer.

8. The base station according to claim 7 , wherein each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of a unit frequency interval and a first frequency offset; or each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of the unit frequency interval, half of the unit frequency interval and the first frequency offset; the unit frequency interval is equal to 12 times of a first subcarrier spacing; a subcarrier spacing of each subcarrier in the X subcarrier(s) is equal to the first subcarrier spacing; the first frequency offset is a non-negative number that is less than a half of the unit frequency interval; the first frequency offset is configurable; or the first frequency offset is a predefined fixed value; the unit frequency interval is equal to a width of a Physical Resource Block (PRB) in frequency domain.

9. The base station according to claim 7 , wherein a frequency interval between the first frequency and a lowest frequency of the first frequency band is equal to a sum of P times of a first raster and a second frequency offset; the P is a positive integer; the first raster is determined by a location of the first frequency band in frequency domain; the second frequency offset is equal to a first threshold; the first threshold is a non-negative number; the first threshold is smaller than the first raster; the first threshold is determined by at least one of a location of the first frequency band in frequency domain, or a subcarrier spacing of the X subcarrier(s); the first raster is equal to a positive integer number of 100 kHz.

10. The base station according to claim 7 , wherein a frequency interval between the second frequency and a lowest frequency of the first frequency band is equal to a sum of Q times of a second raster and a third frequency offset; the Q is a positive integer; the second raster is determined by a location of the first frequency band in frequency domain; the third frequency offset is equal to a second threshold; the second threshold is a non-negative number; the second threshold is determined by at least one of a location of the first frequency band in frequency domain, or a subcarrier spacing of the X subcarrier(s).

11. The base station according to claim 7 , wherein the second transmitter transmits a second signaling; the second signaling is used to determine a frequency interval other than the first frequency interval in the target frequency interval set, the second signaling is carried by a Physical Broadcast Channel (PBCH).

12. The base station according to claim 7 , wherein the first frequency is at the center of one of the X subcarriers or the first frequency is at the boundary of two frequency-domain adjacent subcarriers in the X subcarriers.

13. A user equipment (UE) used for synchronization, comprising:

a first receiver, receiving a first radio signal on first frequency-domain resources in a first time window, the first radio signal is a Primary Synchronization Signal (PSS), the first radio signal is generated by a pseudo-random sequence; and

a second receiver, receiving a first signaling, the first signaling is carried by Secondary Synchronization Signal (SSS);

wherein a center frequency of the first frequency-domain resources is a first frequency; the first frequency-domain resources include X subcarrier(s); the X is a positive integer; a carrier to which the first frequency-domain resources belong is a first carrier, a transmission bandwidth of the first carrier is variable, the first carrier includes transmission frequency-domain resources and guard frequency-domain resources; a frequency band to which the first carrier belongs is a first frequency band; a center frequency of the first carrier is a second frequency, the first frequency band is a Time Division Duplexing (TDD) frequency band; an interval between the first frequency and the second frequency in frequency domain is a first frequency interval; the first frequency interval is related to a subcarrier spacing of the X subcarrier(s)_, which means that the first frequency interval is linearly related to a subcarrier spacing of the X subcarrier(s); the first radio signal is used to determine at least one of a location of the first time window in time domain, the first frequency; the first radio signal is broadcast; or the first radio signal is multicast; the first signaling is used to determine a cell ID of a transmitter of the first radio signal in the first carrier; the first frequency interval belongs to a target frequency interval set; the target frequency interval set includes a positive integer number of frequency interval(s); a subcarrier spacing of the X subcarrier(s) and a location of the first frequency band in frequency domain are used to determine the target frequency interval set out of Y frequency interval sets, a subcarrier spacing of the X subcarrier(s) is one of 15 kHz, 30 kHz, 120 kHz, 240 kHz or 480 kHz; and the Y is a positive integer; the first frequency domain resources are contiguous in the frequency domain, the first time window includes W consecutive OFDM symbols in time domain, W being a positive integer.

14. The user equipment of claim 13 , wherein each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of a unit frequency interval, a first frequency offset; or each frequency interval in the target frequency interval set is equal to a sum of a non-negative integer times of the unit frequency interval, half of the unit frequency interval, the first frequency offset; the unit frequency interval is equal to 12 times of a first subcarrier spacing; a subcarrier spacing of each subcarrier in the X subcarrier(s) is equal to the first subcarrier spacing; the first frequency offset is a non-negative number that is less than a half of the unit frequency interval; the first frequency offset is configurable; or the first frequency offset is a predefined fixed value; the unit frequency interval is equal to a width of a Physical Resource Block (PRB) in frequency domain.

15. The user equipment of claim 13 , wherein a frequency interval between the first frequency and a lowest frequency of the first frequency band is equal to a sum of P times of a first raster and a second frequency offset; the P is a positive integer; the first raster is determined by a location of the first frequency band in frequency domain; the second frequency offset is equal to a first threshold; the first threshold is a non-negative number; the first threshold is smaller than the first raster; the first threshold is determined by at least one of a location of the first frequency band in frequency domain, a subcarrier spacing of the X subcarrier(s); the first raster is equal to a positive integer number of 100 kHz.

16. The user equipment of claim 13 , wherein a frequency interval between the second frequency and a lowest frequency of the first frequency band is equal to a sum of Q times of a second raster and the third frequency offset; the Q is a positive integer; the second raster is determined by a location of the first frequency band in frequency domain; the third frequency offset is equal to a second threshold; the second threshold is a non-negative number; the second threshold is determined by at least one of a location of the first frequency band in frequency domain, or a subcarrier spacing of the X subcarrier(s).

17. The user equipment according to claim 13 , wherein the second receiver receives a second signaling; the second signaling is used to determine a frequency interval other than the first frequency interval in the target frequency interval set, the second signaling is carried by a Physical Broadcast Channel (PBCH).

18. The user equipment according to claim 13 , wherein the first frequency is at the center of one of the X subcarriers or the first frequency is at the boundary of two frequency-domain adjacent subcarriers in the X subcarriers.