METHOD AND APPARATUS FOR PROVIDING AND UTILIZING RADIO LINK CONTROL AND MEDIUM ACCESS CONTROL PACKET DELIVERY NOTIFICATION

摘要

A method and apparatus for providing and utilizing radio link control (RLC) and medium access control (MAC) packet delivery notification are disclosed. A MAC entity tracks a delivery status of a MAC protocol data unit (PDU) and sends MAC service data unit (SDU) delivery notification to an RLC entity and/or an upper layer upon occurrence of a triggering event. The triggering event may be expiration of a timer, a packet discard decision, MAC reset, MAC re-establishment, or a request from the upper layer. The RLC entity may also track a delivery status of an RLC service data unit (SDU) and send RLC delivery notification to the upper layer. An upper layer including a header compression entity may adjust a header compression parameter based on the RLC delivery notification or the MAC delivery notification. The RLC delivery notification may be used for lossless handover. Retransmission may be performed at the upper layer based on the RLC delivery notification or the MAC delivery notification.