Technical Report Number
Sensor networks often involve the monitoring of mobile phenomena, which can be facilitated by a spatiotemporal multicast protocol we call “mobicast”. Mobicast is a novel spatiotemporal multicast protocol featuring a delivery zone that evolves over time. Mobicast can in theory provide absolute spatiotemporal delivery guarantees by limiting communication to a mobile forwarding zone whose size is determined by the global worst-case value associated with a compactness metric deﬁned over the geometry of the network. In this work, we ﬁrst studied the compactness properties of sensor networks with uniform distribution. The results of this study motivate three approaches for improving the eﬃciency of spatiotemporal multicast in such networks. First, one may achieve high savings on communication overhead by slightly relaxing spatiotemporal delivery guarantees. Second, spatiotemporal multicast may exploit local compactness values for higher eﬃciency for networks with non uniform spatial distribution of compactness. Third, for random uniformly distributed sensor network deployment, one may choose a deployment density to best support spatiotemporal communication. We also explored all these directions via mobicast simulation and results are presented in this paper.
Huang, Qingfeng; Lu, Chenyang; and Roman, Gruia-Catalin, "Spatiotemporal Multicast in Sensor Networks" Report Number: WUCSE-2003-18 (2003). All Computer Science and Engineering Research.