| CPC H04W 4/40 (2018.02) | 20 Claims |

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1. A Road Side Unit (RSU) device for a wireless communication system, the RSU device comprising:
a communication interface configured to transmit and receive messages with a server and a plurality of direct communication User Equipment (UE); and
a controller configured to:
receive a first vehicle-to-everything (V2X) service related information item from the server,
in response to determining that signature processing is currently available for the first V2X service related information item, perform signature processing for the first V2X service related information item to generate first signature-processed V2X service related information and transmit the first signature-processed V2X service related information to one direct communication UE among the plurality of direct communication UE, and
in response to determining that signature processing is currently unavailable for the first V2X service related information item, continue to collect a plurality of V2X service related information items from the server until signature processing becomes available and when signature processing become available, perform signature processing for the first V2X service related information item and the plurality of V2X service related information items as a group of V2X information to generate second signature-processed V2X service related information, and transmit the second signature-processed V2X service related information to the one direct communication UE.
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