Energy efficient Media Access Control (MAC) strategies have been widely confirmed to be one of the essential solutions for power-saving in Mobile Ad Hoc Networks (MANETs). The aim of the work in this thesis is to examine the existing energy efficient MAC protocols for wireless ad hoc networks, and to develop enhanced energy efficient MAC strategies for MANETs. Taking a typical example of the WLAN ad hoc network power saving mode, a statistical model is proposed for the analysis of the power-saving MAC performance in the presence of Rayleigh fading. The analysis and simulation results show that the power-saving MAC mechanisms will degrade networking performance, such as end-to-end delay, and throughput, on the other hand, the impact of power-saving MAC methods on routing protocols is studied based on the proposed analytical model. Consequently, new power saving MAC mechanisms are proposed to balance the power saving and throughput under dynamic traffic load and improve the routing discovery performance. Power-saving MAC protocols are also strongly linked to the network topology management. Based on the comparison and discussion of various wireless network topologies, a novel hierarchical clustering algorithm is proposed in this thesis to prolong the lifetime of the whole network, improve the network throughput and simplify topology management in a large scale network. In MANETs, because of mobility, the dynamic radio environment, and the distributed networking operations, power control is different from those in other type of networks. Focusing on the solutions of power control in the MAC layer, this thesis also presents a novel power control and interference mitigation method for Wireless Personal Area Networks (WPANs). The method proposed is based on the Piconet Coordinator (PNC) selection mechanism in IEEE802.15-based WPANs, since the PNC is important as it centrally controls all networking operations. A practical implementation of the proposed power control method is also introduced in this thesis. The experiments demonstrate that the proposed method can dramatically improve the energy efficiency and network robustness.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:664237 |
| Date | January 2006 |
| Creators | Zhou, Yuefeng |
| Publisher | University of Edinburgh |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/1842/10675 |
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