Sidelink synchronization signal block transmissions in a shared spectrum

A user equipment (UE), comprising:

• one or more memories storing processor-executable code;
• and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:
• identify a discovery reference signal (DRS) window in a shared spectrum comprising a plurality of starting positions for transmitting one or more sidelink synchronization signal blocks;
• perform a listen-before-talk procedure to gain access to the discovery reference signal window in the shared spectrum;
• and
• transmit the one or more sidelink synchronization signal blocks at a first starting position of the plurality of starting positions after gaining access to the discovery reference signal window in the shared spectrum, wherein the one or more sidelink synchronization signal blocks are transmitted in a sidelink bandwidth part, and a lower edge in a frequency domain of the one or more sidelink synchronization signal blocks is aligned with or offset from a lower edge in the frequency domain of the sidelink bandwidth part.

A user equipment (UE) for wireless communications, comprising:

• means for identifying a discovery reference signal (DRS) window in a shared spectrum comprising a plurality of starting positions for transmitting one or more sidelink synchronization signal blocks;
• means for performing a listen-before-talk procedure to gain access to the discovery reference signal window in the shared spectrum;
• and
• means for transmitting the one or more sidelink synchronization signal blocks at a first starting position of the plurality of starting positions after gaining access to the discovery reference signal window in the shared spectrum, wherein the one or more sidelink synchronization signal blocks are transmitted in a sidelink bandwidth part, and a lower edge in a frequency domain of the one or more sidelink synchronization signal blocks is aligned with or offset from a lower edge in the frequency domain of the sidelink bandwidth part.

A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to:

• identify a discovery reference signal (DRS) window in a shared spectrum comprising a plurality of starting positions for transmitting one or more sidelink synchronization signal blocks;
• perform a listen-before-talk procedure to gain access to the discovery reference signal window in the shared spectrum;
• and
• transmit the one or more sidelink synchronization signal blocks at a first starting position of the plurality of starting positions after gaining access to the discovery reference signal window in the shared spectrum, wherein the one or more sidelink synchronization signal blocks are transmitted in a sidelink bandwidth part, and a lower edge in a frequency domain of the one or more sidelink synchronization signal blocks is aligned with or offset from a lower edge in the frequency domain of the sidelink bandwidth part.