Wireless Cooperative Networks: Self-Configuration and Optimization
Abstract
In wireless sensor networks, relay transmissions can enable cooperative diversity by forming virtual antenna arrays. The optimum resource allocation in such systems is critical to enhance their error rate performance and energy efficiency. Existing work often focus on the optimization of the energy allocation among the source and relay nodes. This is not only undesirable from the relays' point of view especially when they are required to transmit at high power levels, but also impossible at times since the sensor nodes are each limited by their individual battery capacity. On the other hand, the source is very likely to have multiple candidates to choose from. In a mobile sensor network, the relay nodes can also move to desirable locations to better assist the communication from the source node to the destination node. In order to exploit the freedom in terms of relay location, we treat the resource allocation in relay networks as a two-dimensional (energy and location) optimization problem and establish some very interesting results. To facilitate the implementation of such an optimum strategy, we also investigated precise localization techniques for wireless sensor networks.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 10, 2008
- Accession Number
- ADA475442
Entities
People
- Liuqing Yang
- Roslyn S. Oleson
Organizations
- University of Florida