Traffic-adaptive, flow-specific medium access for wireless networks
Walker, T. Owen, III
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This dissertation pioneers the concept of traffic-adaptive, flow-specific medium access and demonstrates that it outperforms contention, non-contention and hybrid techniques. The novel traffic-adaptive Cooperative Wireless Sensor Network Medium Access Control (CWS-MAC) scheme is proposed and shown to provide better throughput and delay performance than slotted, non-persistent carrier sense multiple access (CSMA), upon which the IEEE 802.11 standard is based, and time division multiple access (TDMA). A general model for traffic-adaptive, flow-specific medium access control is developed and hybrid, contention and non-contention schemes are shown to be special cases. This work also compares the energy efficiency of centralized and distributed solutions and proposes an energyefficient version of traffic-adaptive CWS-MAC that includes an adaptive sleep cycle coordinated through the use of preamble sampling. A preamble sampling probability parameter is introduced to manage the trade-off between energy efficiency and throughput and delay performance. Finally, this research quantifies the effect of large propagation delays on contention and contention-free medium access and proposes a flow-specific medium access scheme for networked satellite systems that is based on traffic-adaptive CWS-MAC and is shown to outperform both CSMA- and TDMA-based solutions.
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Walker, T. Owens; Tummala, Murali; McEachen, John (Monterey, California. Naval Postgraduate School, 2009); NPS-EC-09-002In this report, we formally introduce the novel concept of traffic-adaptive, flow-specific medium access control and show that it outperforms contention, non-contention and hybrid medium access schemes. A traffic-adaptive, ...
Walker, Thaddeus Owens; Park, Severna; Tummala, Murali; McEachen, John Colin (The United States of America as represented by the Secretary of the Navy, Washington, DC (US), 2014-05-13);Energy-efficient, traffic-adaptive Cooperative Wireless Sensor Medium Access Control (CWS-MAC) is a traffic-adaptive, flow-specific medium access method capable of providing contention- or non-contention-based medium access ...
Walking, T. Owens, III; Tummala, Murali; McEachen, John (2009-09);Current wireless sensor network applications face challenging power constraints that demand low duty cycles. In this paper, we propose an energy-efficient, flow-specific medium access scheme that is capable of achieving ...