Aggressive Packet Combining Scheme with Packet Reversed and Packet Shifted Copies for Improved Performance
Yang Saring, Shashank Vikram Singh · IETE Journal of Research · 2018
Wireless channel suffers from high bit error rate due to noise, fading, interference, and shadowing. High bit error rate significantly reduces the effective bandwidth available to users thus affecting the overall throughput. In order to tackle high bit error rate and multiple bit errors with low latency (for fast delivery), a new modification of APC scheme is proposed in this paper. In the proposed scheme, first copy sent from transmitter to receiver is an exact replica of the original packet; if this transmission is unsuccessful, the transmitter retransmits two copies of the original packet in which one of the retransmitted copy is bit reversed of the original packet and the other retransmitted copy is bit shifted copy of the original packet. The proposed aggressive packet combining scheme with packet reversed packet shifted copies has been studied analytically and by simulation in MATLAB. The analytical results show that the proposed packet reversed packet shifted aggressive packet combining scheme can correct multiple bit errors (random errors and burst errors) even when the errors occur in the same bit locations of all received erroneous copies, yielding better error correction capability and throughput than existing packet combining schemes.