| 摘要 |
In a communication system (100) where a wireless relay node (RN) (114) relays data packets between a Node B (112) and a user equipment (UE) (102), the RN receives (708) a plurality of data packets from the Node B via a first wireless link (115), conveys (712) one or more of the received data packets to the UE via a second wireless link (120) and maintains (714) a status of data packets received from the Node B but not yet acknowledged to the Node B. The RN assembles (718) a status report indicating which data packets of the plurality of data packets have one or more of not been transmitted to the UE and been transmitted to the UE but for which an acknowledgement has not been received from the UE, and coveys (720) the status report to the Node B. Based on the status report, the Node B may delete (724) the data packets that have been transmitted to the UE, or that have been transmitted to, and acknowledged by, the UE. Assembly and conveyance of the status report may be triggered by a determination (716), by the RN, that the UE is "likely to handoff". |
