We describe the design and implementation of a power-saving protocol for ad hoc wireless networks. We present the Span power-saving protocol and discuss its implementation in the context of the Linux operating system. We address the issues of ad hoc routing, link layer design, and integration with the Linux networking stack using the 802.11b wireless link technology. From this thesis, we conclu...

A mobile ad hoc network (MANET) is a collection of nodes equipped with wireless communications and a networking capability without central network control. Nodes in a MANET are free to move and organize themselves in an arbitrary fashion. Energy-efficient design is a significant challenge due to the characteristics of MANETs such as distributed control, constantly changing network topology, and...

Power saving and query processing are two major concerns in a wireless sensor network. Each of these two issues has been intensively studied separately in the literature. In this work, we are interested in linking the asynchronous power-saving protocol and the continuous query-processing problem together. A cross-layer solution is proposed. On the MAC layer, we propose to use the grid-quorum sy...

A mobile computer operates on a finite battery power that represents one of the greatest limitation to the utility of portable computers [2,6]. Projections on progress in battery technology show that only small improvements in the battery capacity are expected in next future [16]. If the battery capacity cannot be improved, it is vital that power utilization is managed efficiently by identifyin...

There are two types of power saving protocols for IEEE 802.11-based MANETs: synchronous and asynchronous. IEEE 802.11 has defined a synchronous power-saving (PS) protocol for single-hop (full connected) MANETs based on periodical transmission of beacons by accurate clock synchronization. There are some quorum-based asynchronous PS protocols proposed. The protocols need no synchronized clocks; h...

Energy efficient protocol design is the aim of current researches in the area of sensor networks where limited power resources impose energy conservation considerations. In this paper we care for Medium Access Control (MAC) protocols and after an extensive literature review, two adaptive schemes are discussed. Of them, adaptive-rate MACs which were introduced for throughput enhancement show the...

In this paper, we propose an Improved Power Control MAC (IPCM) protocol which improves the throughput and yields energy saving. This protocol sends all the packets RTS, CTS, DATA and ACK with optimal transmit power, which save the energy, makes spatial reuse of the wireless channels, and achieves the maximum throughput. On the other hand, the power of the data packets is periodically raised to ...

To support mobility, mobile devices must be powered by batteries with limited energy. Thus, energy-efficient management becomes one of the most important design issues in mobile wireless networks. A well-designed energy-efficient MAC protocol for mobile wireless networks should be developed for both minimum energy consumption as well as maximum data throughput. IEEE 802.11 MAC protocol is based...