Use of previously buffered state information to decode in an hybrid automatic repeat request (H-ARQ) transmission mode

摘要

In the various embodiments, decoders, methods, systems and devices exploit state information associated with transmitted packets to facilitate decoding operations. Specifically, in at least some embodiments, packets are received by a receiver. If the packet is unable to be decoded because of corruption, state information associated with that packet is buffered at the receiver and used for subsequent decoding. A retransmitted packet is then received, checked for corruption and, if not corrupted, is decoded leveraging the previously-buffered state information associated with the corrupted packet. In an event that one or more retransmitted packets are corrupted, this process can be repeated a number of times.

主权项

1. A method comprising:
receiving a retransmitted packet via a receiver, the receiver configured for communication in a hybrid automatic repeat request (H-ARQ) mode; assigning, based on forward or reverse state information associated with a previously-transmitted packet, a starting probability to a trellis state of a convolutional-turbo-code (CTC) decoder that is in an unknown starting state, the unknown starting state being a state in which trellis states of the CTC decoder have a same initial probability that is different from the assigned starting probability; and decoding, via the CTC decoder and based on the assigned starting probability, the retransmitted packet.