Maximizing Gathered Samples in Wireless Sensor Networks with Slepian-Wolf Coding

作者：Wang Tianqi^*; Vosoughi Azadeh; Heinzelman Wendi; Seyedi Alireza

来源：IEEE Transactions on Wireless Communications, 2012, 11(2): 751-761.

DOI：10.1109/TWC.2011.122211.110417

• Slepian-Wolf coding
• transmit power adaptation
• rate allocation
• transmission duration
• circuit power consumption
• optimization
• residual energy

We consider an energy constrained wireless sensor network, with arbitrary number of nodes, where source nodes utilize Slepian-Wolf (SW) coding before transmission to a joint decoder. We investigate optimal and near-optimal SW coding rates, transmit powers, and transmit durations that maximize the number of collected samples during the network lifetime, subject to channel capacity, SW rate region, and residual energy constraints. We find optimal (near-optimal) closed-form solutions in the absence (presence) of an energy constraint at the joint decoder. We take into account the energy consumption of SW encoding and decoding and communication circuitry. Numerical results demonstrate the effectiveness of the proposed optimization, especially when the joint decoder is not energy constrained.

• 出版日期2012-2