Methods, devices, and systems for determining sync raster

A user equipment (UE) in a wireless communications network comprising at least one processor and a memory, wherein the at least one processor is configured to read code from the memory to:

• determine a synchronization raster, SR, wherein a frequency position of the SR is specified in a predefined table, and wherein a minimum bandwidth supported by the UE is less than 5 MHz in a frequency range of 0-1 GHz;
• reference the frequency position of the SR to detect a synchronization signal/physical broadcast channel, SS/PBCH, block transmitted by a base station by performing a scan of a plurality of SRs for the SS/PBCH at the frequency position through a blind detection;
• and
• in response to a bandwidth of the SS/PBCH block being larger than the minimum bandwidth and that at least one resource block, RB, in the SS/PBCH block exceeding the minimum bandwidth, not receive by the UE the at least one RB when detecting the SS/PBCH block, wherein the frequency position in the frequency range is determined by (N*b+M*c−f) kHz, and wherein:
• N is an integer between 1 and n, inclusive, for indicting SR groups;
• M represents SRs within each SR group and comprises a list of {1, 3 . . . 2m−1} with m being an integer larger than 2;
• b is a frequency interval between two adjacent SR groups;
• and
• c is a frequency interval base for SRs in each SR group;
• and
• f represents a frequency offset.

A non-transitory computer-readable storage medium for storing instructions, the instructions, when executed by at least one processor of a user equipment (UE) in a wireless communications network, are configured to:

• determine a synchronization raster, SR, wherein a frequency position of the SR is specified in a predefined table, and wherein a minimum bandwidth supported by the UE is less than 5 MHz in a frequency range of 0-1 GHz;
• reference the frequency position of the SR to detect a synchronization signal/physical broadcast channel, SS/PBCH, block transmitted by a base station by performing a scan of a plurality of SRs for the SS/PBCH at the frequency position through a blind detection;
• and
• in response to a bandwidth of the SS/PBCH block being larger than the minimum bandwidth and that at least one resource block, RB, in the SS/PBCH block exceeding the minimum bandwidth, not receive by the UE the at least one RB when detecting the SS/PBCH block, wherein the frequency position in the frequency range is determined by (N*b+M*c−f) kHz, and wherein:
• N is an integer between 1 and n, inclusive, for indicting SR groups;
• M represents SRs within each SR group and comprises a list of {1, 3 . . . 2m−1} with m being an integer larger than 2;
• b is a frequency interval between two adjacent SR groups;
• and
• c is a frequency interval base for SRs in each SR group;
• and
• f represents a frequency offset.