Arbutus: Network-Layer Load Balancing for Wireless Sensor Networks

摘要: The hot spot problem is a typical byproduct of the many-to-one traffic pattern that characterizes most wireless sensor networks: nodes with best channel to sink are overloaded from rest network and experience faster energy depletion rate than their peers. Routing protocols for networks typically use reliability metric avoid lossy links thus directly exacerbate problem. Significant advantages can be obtained by embedding load balancing scheme at layer, as we show design implementation Arbutus, novel routing protocol built-in scheme. By imposing special structure on collection tree, privileging longer hops, accounting in route selection process, Arbutus reduces impact spots lifetime without deterioration end-to-end performance. An Berkeley motes MoteLab testbed shows 30% reduction needed achieve same packet delivery an existing mote-oriented protocol. This provides key benefits such significant gain increased fault tolerance.