Latency control in S-MAC for WSN
Song Wen-tao · Information technology newsletter · 2006
S-MAC protocol is probably the most well-known contention-based sensor MAC scheme for the energy efficiency.It has exploited scheduled sleep/wake up cycles to conserve the energy.However,strict schedules incur a latency penalty in a multi-hop network when packets must wait for the next schedule for transmission.To reduce latency in multi-hop paths the fast data forwarding algorithm(FDF) are developed.FDF provides fast data forwarding paths by adding additional wake-up periods on the nodes along paths from sources to sinks.Through the simulation in NS-2,compared with S-MAC based on the adaptive listening,the improved systems achieve much better performance in the throughput and latency.