A method for receiving a plurality of data packets is disclosed. The method includes: receiving MAC PDUs from a source UE of the wireless network through a relay UE, a base station and directly from the source UE, wherein the MAC PDUs are composed of RLC PDUs and RLC PDU segments; demultiplexing the MAC PDUs to retrieve the RLC PDUs and the RLC PDU segments based on a header field of each MAC PDU; reordering the RLC PDUs and the RLC PDU segments and performing a duplicate detection of the RLC PDUs and the RLC PDU segments according to TSNs, wherein each TSN is included in a header field of each RLC PDU and each RLC PDU segment; and reassembling the RLC PDUs and the RLC PDU segments into RLC SDUs using information included in the header field of each RLC PDU and each RLC PDU segment.