Extended RTS/CTS Protocol for Uni-directional FEC in Ad-Hoc Communication

In wireless ad-hoc networks where concurrent transmissions of data messages by hidden wireless nodes should be avoided, better trade off between reliability and transmission delay is required. The authors have proposed the method to adaptively apply either BEC (Backward Error Correction) or FEC (Forward Error Correction) based on bit error ratio and transmission request frequence. In FEC communication, it is possible for neighbor wireless nodes to transmit data messages concurrently under some restriction, however, the original RTS/CTS protocol does not support such concurrent transmissions. This paper proposes an extended RTS/CTS protocol which support concurrent FEC transmissions by introduction of intervals between PRTS and PCTS and between PCTS and a data message. Since both the extended and the original protocols can be applied in a wireless ad-hoc network, it contributes to the mixture of BEC and FEC communications.