Gains of Deadline Based Discarding (DBD) over Lossy Wireless Sensor Networks

In this paper we analyze a distributed packet drop decision, the deadline based discard DbD, in a lossy wireless sensor network environment. We point out that if the non-stale packet success rate is the single utility function for low latency high reliability applications then we can use the packet delay to evaluate the usefulness under the scope of deadline. The technique results in no decrease in utility function but possible gains. In case the metric is used in a centralized perspective, it even provides gains through decrease in expected serving times of a packet. We show analytically and simulatively that, it is possible to reduce energy consumption, increase resource usage and decrease required buffer size in both distributed and central view. A practical example for energy saving with actual wireless sensor data is also given as a conclusion.