Method and apparatus for retransmission management for reliable hybrid ARQ process
A method and apparatus for transmitting a packet from a transmitter entity to a receiver entity in a wireless communication system are disclosed. A transmitting entity includes a radio link control (RLC) sublayer and lower layers including a medium access control (MAC) sublayer and a physical layer, where the RLC sublayer provides a protocol data unit (PDU) to the lower layers for transmission. The lower layers using a HARQ entity transmit the PDU to the receiving entity. The RLC sublayer in the transmitting entity, without an indication from an RLC sublayer of the receiving entity, provides the PDU in response to an indication from the lower layers for retransmission.
1. A user equipment comprising:
at least one processor configured to implement a radio link control (RLC) sublayer and lower layers including a medium access control (MAC) sublayer and a physical layer; wherein the at least one processor is configured such that the RLC sublayer provides a protocol data unit (PDU) to the lower layers for transmission; wherein the at least one processor is further configured such that the lower layers using a HARQ entity transmit the PDU to a base station; wherein the at least one processor is further configured such that the RLC sublayer, without an indication from an RLC sublayer of a network, provides the PDU in response to an indication from the lower layers for retransmission, wherein the RLC sublayer comprises an acknowledge mode (AM) RLC entity and the providing of the PDU for transmission and retransmission is by the AM RLC entity.
2. The user equipment of claim 1 wherein the indication from lower layers is from the HARQ entity.
3. A network node comprising:
at least one processor configured to implement a radio link control (RLC) sublayer and lower layers including a medium access control (MAC) sublayer and a physical layer; wherein the at least one processor is configured such that the RLC sublayer provides a protocol data unit (PDU) to the lower layers for transmission; wherein the at least one processor is further configured such that the lower layers using a HARQ entity transmit the PDU to a base station; wherein the at least one processor is further configured such that the RLC sublayer, without an indication from an RLC sublayer of a network, provides the PDU in response to an indication from the lower layers for retransmission, wherein the RLC sublayer comprises an acknowledge mode (AM) RLC entity and the providing of the PDU for transmission and retransmission is by the AM RLC entity.
4. The network node of claim 3 wherein the indication from lower layers is from the HARQ entity.