Thesis
Local coordination medium access control for wireless sensor networks
Washington State University
Master of Science (MS), Washington State University
2008
Handle:
https://hdl.handle.net/2376/102312
Abstract
Energy-efficient medium access control (MAC) protocols have been at the forefront of research within wireless sensor networks (WSN) due to the unique resource-constraints of sensor nodes. With limited processing capabilities, memory space, and battery power, a node is unable to perform complicated tasks and computations nor can it accurately assess an event alone. Hence, the role of a base station (sink): the destination for all packet reports to be analyzed. With heavy contention at the event site and traffic becoming more concentrated towards the sink (known as convergecast), a new perspective in designing a MAC may be the key to better energy-efficient transmissions. Most MAC protocols have addressed the issue of contention and collision resolution at the traditional micro level, trying to access the channel to send a packet to a given destination, which is determined by the upper routing layer. However, with WSNs, one should look at communication from a macro perspective since most applications share the same traffic pattern. We propose an energy-efficient cross-layered MAC protocol which allows a node to locally coordinate amongst others for productive event reporting, named LoC-MAC. ECR-MAC [57] is used as a basis and we improve upon it by allowing each node to maintain a list of its multiple next-hop forwarders’ duty cycle schedules in order to identify when it can ask a forwarder to perform data exchange. Performance evaluation has shown that LoC-MAC has comparable results with ECR-MAC, while consuming less energy.
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Details
- Title
- Local coordination medium access control for wireless sensor networks
- Creators
- Monique Sachie Kohagura
- Contributors
- Muralidhar Medidi (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525042501842
- Language
- English
- Resource Type
- Thesis