Method and system for implementing hybrid automatic repeat request
A receiver sends hybrid automatic repeat request (H-ARQ) feedback for a current packet and at least one previous packet, whereby an error is detected based on the H-ARQ feedback. The receiver sends H-ARQ feedback with an identification of the packet or a sequence number of a packet that the receiver expects to receive next. The receiver stores a packet in a memory before combining the packet with a previously received packet, and decodes the stored packet after failing to decode a combined packet to avoid a corruption error. The receiver may set a timer when sending a NACK. If the receiver fails to receive a packet until expiration of the timer, the receiver initiates a process for recovering the packet. Each H-ARQ feedback may be associated with other attributes. Some H-ARQ processes may operate in an asynchronous mode while others in a synchronous mode in the same direction.
1. A method, performed by a receiver, of implementing hybrid automatic repeat request (H-ARQ), the method comprising:
receiving a packet;
storing the packet in a memory before combining the packet with a previous received packet;
decoding a combined packet; and
decoding the packet stored in the memory on a condition that the decoding of the combined packet failed.
2. The method of claim 1 wherein available resources are pooled and dynamically allocated for multiple H-ARQ processes and a certain H-ARQ process is given a higher priority for the resources.
3. A method, performed by a receiver, of implementing hybrid automatic repeat request (H-ARQ), the method comprising:
transmitting a negative acknowledgement (NACK);
setting a timer in response to the transmission of the NACK;
clearing the timer on a condition that a packet corresponding to the NACK is received; and
initiating a process for recovering the packet on a condition that a packet corresponding to the NACK is not received.
4. The method of claim 3 further comprising:
transmitting a report indicating an H-ARQ error to recover a failed packet at an H-ARQ level.
5. The method of claim 3 further comprising:
transmitting a local NACK indicating an H-ARQ error.
6. A receiver for implementing hybrid automatic repeat request (H-ARQ), the receiver configured to:
receive a packet;
store the packet in a memory before combining the packet with a previous received packet;
decode a combined packet; and
decode the packet stored in the memory on a condition that the decoding of the combined packet failed.
7. The receiver of claim 6 wherein available resources are pooled and dynamically allocated for multiple H-ARQ processes and a certain H-ARQ process is given a higher priority for the resources.
8. A receiver for implementing hybrid automatic repeat request (H-ARQ), the receiver configured to:
transmit a negative acknowledgement (NACK);
set a timer in response to the transmission of the NACK;
clear the timer on a condition that a packet corresponding to the NACK is received; and
initiate a process for recovering the packet on a condition that a packet corresponding to the NACK is not received.
9. The receiver of claim 8 wherein the receiver is further configured to transmit a report indicating an H-ARQ error to recover a failed packet at an H-ARQ level.
10. The receiver of claim 8 wherein the receiver is further configured to transmit a local NACK indicating an H-ARQ error.