A MAC protocol using busy tone in wireless networks of ad hoc nodes
with heterogeneous power capabilitiese <Abstract> This paper presents a MAC protocol using busy tone in wireless networks of Ad hoc nodes with heterogeneous power capabilities?DIn the proposed protocol?Cdual busy tones are assigned to the nodes with high power and those with low power?DThe nodes know the states of transmissions from the combinations of RTS and dual busy tones. The destination node receives the RTS and turns busy tone on?DWhen a node with with high power senses BT$l$ ?Cit turns BT$h$ on in order to forward BT$l$ to hidden nodes?DIf a node senses busy tone?Cthe node prohibits transmission to improve hidden nodes problem ?DMoreover?Cthe proposed protocol supports broadcast because all nodes that receive data turn busy tone on?DAs a result?Cthe proposed protocol supports mixed communication of unicast and broadcast?DThe simulation results show the proposed protocol improves performance compared with the conventional ones ?D |