Date Added: Jan 2012
In this paper, the authors investigate the throughput capacity of heterogeneous WSNs with different network topologies and analyze the impact of topologies on network properties. They find that compared to sub-networks of the same scale, combined networks have a larger overall throughput capacity. They also find that uniformly distributed sensor nodes and regularly distributed helping nodes have some advantages in improving the network capacity. Compared to regularly distributed helping nodes, any change of helping nodes' topology cannot improve the network throughput capacity in the sense of scaling law.