A MAC protocol for multihop RP-CDMA ad hoc wireless networks

RP-CDMA is a wireless multiple access protocol that utilizes multiple spreading codes and a multiple packet receiver to enhance link reliability and performance. We apply RP-CDMA to a multihop wireless ad hoc network and propose two significant extensions aimed at improving throughput and reliability. Our simulations confirm that RP-CDMA can substantially improve link reliability and network performance, but that a link level acknowledgement protocol is required to ensure packet delivery across the network. We investigate a simple acknowledgement policy and conclude that it enables simultaneous high throughput and packet delivery while maintaining low latency.