Patent ID: 8270361

Claim:
A method of relaying a data packet by a relay node (RN) in a wireless communication system, the method comprising: establishing a plurality of first radio bearers (RBs) over a first radio interface (UuRB) between at least one user equipment (UE) and the RN; establishing a second RB over a second radio interface (UnRB) between the RN and a donor base station (BS); mapping at least one of the plurality of first RBs to the second RB based on the plurality of Quality of Service (QoS) Class identifier (QCI) associated with the plurality of first RBs, each QCI representing QoS required by each first RB, wherein the second RB is mapped to a third bearer associated with an interface between the donor BS and a serving gateway; receiving a data packet from the serving gateway via the second RB and the third bearer, the data packet including a General Packet Radio Service (GPRS) Tunnelling Protocol (GTP) identifier which identifies one of the plurality of first RBs; and transmitting the data packet to the UE via the identified first RB.