Apparatus and method for performing wireless communication in wireless communication system supporting vehicle communication

A first wireless device comprising:

• a wireless transceiver;
• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
• receive, from a base station, configuration information associated with a packet duplication transmission between wireless devices, wherein the configuration information comprises information indicating a mapping between a logical channel group and a packet reliability parameter, wherein the packet reliability parameter is used to determine, by the first wireless device, activation of the packet duplication transmission between wireless devices and indicates a value selected from a plurality of configured values, and wherein the plurality of configured values comprises eight integer values each indicating a different reliability requirement;
• receive, via a direct communication from a second wireless device, a plurality of data duplicates mapped onto different logical channels;
• determine, based on the different logical channels, the plurality of data duplicates, wherein the plurality of data duplicates are associated with a same sequence number;
• store, based on the same sequence number, one of the plurality of data duplicates;
• and
• discard, after storing the one of the plurality of data duplicates, remaining data duplicates of the plurality of data duplicates.