Comparing basic GBN with packet reversed packet combining scheme, modified packet combining scheme and the combination

Packet combining scheme is a simple error correction scheme with erroneous copies at the receiver. It offers higher throughput than that of basic ARQ protocols but fails to correct errors when errors occur in the same bit locations of erroneous copies. The Packet Reversed Packet Combining (PRPC) Scheme corrects errors if they occur at the same bit location. Again, packet combining scheme fails to correct double or higher bit errors. A Modified Packet Combining (MPC) Scheme corrects double or higher bit errors. Some previous studies on three schemes namely PRPC, MPC and MPC with PRPC found that they offer higher throughput over basic stop and wait ARQ protocol. As in networks, GBN (Go Back N) protocol is mostly used in this paper. We make a study of the comparison of schemes with GBN. We find that in practical ranges of packet size, window size and bit error rate, the schemes offer higher throughput than that of basic GBN. (author)