We propose PCOR, a power control and routing scheme for rechargeable wireless sensor networks (WSNs) that are characterized by spatial and temporal variations of energy resources. A data collection traffic pattern is assumed, where all sensor nodes perform periodic sensing and forwarding of data to a centralized base station (sink), which is common in many environmental monitoring applications....

Frames for Reducing Overhearing in Wireless Sensor Networks Abdelmalik Bachir, Dominique Barthel, Martin Heusse, and Andrzej Duda 1 France Telecom R&D Meylan, France 2 LSR-IMAG Laboratory Grenoble, France Abstract. We present a novel idea for energy saving by reducing overWe present a novel idea for energy saving by reducing overhearing redundant copies of broadcast frames. It is based on abstr...

Absence of line power supplies imposes severe constraints on nodes in wireless ad hoc and sensor networks. In this paper, we concentrate on finding a broadcast tree that maximizes the network’s lifetime. Previous studies showed that this problem is polynomially solvable when assuming the receiver consumes no energy or only the designated receiver consumes energy for receiving packets. Due to th...

Not only is network coding essential to achieve the capacity of a single-session multicast network, it can also help to improve the throughput of wireless networks with multiple unicast sessions when overheard information is available. Most previous research aimed at realizing such improvement by using perfectly overheard information, while in practice, especially for wireless networks, overhea...

Rayleigh fading channels is theoretically derived. Numerical results validate our theoretical analysis and show that by introducing overhearing among relays, the outage performance of the system can be greatly improved. It also shows that there is a trade-off between system sum outage capacity and the transmitted number of symbols.