Measured performance of a memory-efficient segment-based packet-combining scheme

Packet-combining schemes are an attractive improvement to ARQ schemes, since they allow receivers to keep the good parts of an otherwise erroneous packet and use these with good parts from subsequent packets to allow for quicker decoding. In the previous paper a memory-efficient hard-decision packet combining scheme has been described and analysed, which relies on intermediate checksums spread into the user data part of a packet. In this paper we provide experimental data on the performance of the proposed packet-combining scheme, showing that a significant percentage of the wireless links found in a large indoor wireless testbed (the TKN TWIST testbed) indeed benefits from introducing such a packet-combining scheme.