Lifetime Scaling Law of Ultra wide Band Sensor Networks with Multi source and Multi destination

Abstract:

The lifetime scaling law of time hopping impulse radio ultra wide band (TH IR UWB) sensor networks with multi source, multi destination is derived. We suppose that each source node transmits data packets to its nd destination nodes along the minimum energy dissipation route respectively. The results indicate that the upper bound on the lifetime of TH IR UWB sensor network is in proportion to the α/2 order of the node density λ. The results also reveal that the upper bound on the lifetime decreases with the number of source nodes ns and the number of destination nodes nd per source node, thus reducing the product of ns and nd can improve lifetime of network. Furthermore, as ns=n and nd=1, the upper bound on lifetime of TH IR UWB sensor network with multi source, multi destination becomes that of mutli source, single destination network in which Sink is the only destination node for all ns source nodes.

Key words:wireless sensor network; ultra wide band; lifetime; energy dissipation