| CPC H04W 72/30 (2023.01) [H04L 5/0048 (2013.01); H04L 5/0051 (2013.01); H04W 4/08 (2013.01); H04W 48/12 (2013.01); H04W 48/16 (2013.01); H04W 56/001 (2013.01); H04W 68/005 (2013.01); H04W 76/10 (2018.02); H04W 76/14 (2018.02); H04W 76/15 (2018.02); H04W 76/19 (2018.02); H04W 76/30 (2018.02); H04W 76/40 (2018.02); H04W 80/04 (2013.01)] | 20 Claims |

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1. Processing circuitry configured to:
cause a receiver to receive a synchronization signal via a wireless communication network;
select a reference signal from a set of reference signals based on a set of communication factors;
cause a transmitter to transmit the reference signal based on the synchronization signal;
cause the receiver to receive a message from a first user equipment based on the reference signal; and
establish a device-to-device communication link with the first user equipment.
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