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Type of Document Master's Thesis Author Pandiarajan, Dinesh Rajan Author's Email Address dineshrajan.p@gmail.com URN etd-12142007-121618 Title Energy Management Mechanisms for Wireless Real-time Environments Degree Master of Science in Computer Science and Engineering Department Computer Science and Engineering Advisory Committee
Advisor Name Title Dr. Christian Poellabauer Committee Chair Dr. Aaron Striegel Committee Member Dr. Sharon Hu Committee Member Keywords
- Wireless Networking
- Distributed Systems
- Embedded Systems
- Mobile Computing
- Real-time Systems
- Energy Management
Date of Defense 2007-12-07 Availability unrestricted Abstract Efficient energy management is extremely critical to the operation and performance of mobile and wireless systems as a result of the limited energy resources (e.g., battery charge) available to these devices. This work observes existing energy management techniques in distributed wireless environments to be non-cooperative in the sense that they reduce the energy consumption of a single device, disregarding potential consequences for other constraints (e.g., end-to-end deadlines) and/or other devices (e.g., energy consumption of neighboring devices). It is shown that energy management in such environments has to be end-to-end in nature, requiring a coordinated approach among participating devices. In this regard, two novel mechanisms, Cooperative Dynamic Voltage Scaling (Co-DVS) and Adaptive Fragmentation are proposed. The Co-DVS mechanism coordinates the individual DVS components at each node such that i) end-to-end latencies are maintained within specified timeliness requirements (deadlines) and ii) higher energy savings are achieved at nodes with the highest pay-off factors that represent the relative benefits of conserving energy at a node. Similarly, the Adaptive Fragmentation mechanism chooses an optimal link-layer fragment size that i) satisfies end-to-end delay requirements and ii) minimizes the energy consumption of the source device by lowering the re-transmission costs.Files
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