A method of a first UE comprises: determining a sidelink synchronization identity (SL-SID) and a set of resources; generating at least one sidelink synchronization signal and physical broadcast channel (S-SSB) based on the SL-SID and the set of resources, wherein each S-SSB of the at least one S-SSB includes first two symbols for a sidelink primary synchronization signal (S-PSS) and second two symbols for a sidelink secondary synchronization signal (S-SSS); generating a first sequence corresponding to the S-PSS, wherein the first sequence is determined based on a binary phase shift keying (BPSK) modulated M-sequence with a 127 of sequence length and a low cross-correlation with a PSS; generating a second sequence corresponding to the S-SSS, wherein the second sequence is determined based on a BPSK modulated Gold-sequence with a 127 of sequence length; and transmitting, the at least one S-SSB over sidelink channels established with the second UE.