Staggered multicast protocol with collision-free acknowledgement in multihop spread spectrum packet radio networks

The authors present the staggered multicast protocol with collision-free acknowledgement, which is suitable for unicasting and broadcasting as well as multicasting in multihop spread spectrum packet radio networks. The common-header/transmitter-based spreading code is used for data packet transmission and the receiver-based code is used for acknowledgement packet transmission. By staggering packet transmission the protocol can significantly reduce broadcasting delay. A special addressing method and packet format are also proposed to achieve collision-free acknowledgement and multicast capability. The simulation result shows that the protocol provides better throughput-delay performance than the common-header/transmitter-based slotted ALOHA protocol