The research on end-to-end delay upper bound in wireless sensor network

Research shows that traditional end-to-end delay upper bound in wireless sensor network (WSN) is pessimistic. Thus based on network calculus, this paper presents a network model with the arrival curve regulated by the leaky bucket and rate-latency service curve, and derivates an improved deterministic upper bound of end-to-end delay in WSN by improving the output bound of a flow traversing a node. Due to the stricter output bound, the delay upper bound derived in the paper is simpler and more accurate, which is useful for topology control and routing protocol design in delay-guaranteed WSN in order to improve the quality of service. Numerical results show that the paper's delay bounds are improved well, which are much tighter than traditional delay bounds.