Cooperative Networks
Abstract
Future tactical networks will be complex, with severe constraints on energy and bandwidth, operating in dynamic and unpredictable environments. By exploiting the broadcast nature of the wireless medium and spatially dispersed nodes, some of the advantages of using multiple antennas can be realized through cooperation among nodes in a network. Recent work has demonstrated that cooperation can provide increased range, improved efficiency, and more reliable and longer lasting connectivity. However, in large, complex networks, centralized control will likely be infeasible, and the overhead required for communications between the cooperating nodes could be excessive. To address these issues, we focused on developing and analyzing cooperative strategies which work well without centralized control or inter-node communications, and which are based on locally obtained information. In particular, we devised several decentralized techniques for relay selection and combining, as well as for power allocation, and demonstrated the efficacy of these approaches. We also studied the use of OFDM to facilitate cooperation in the extension of these strategies to multihop networks. In addition, to further understand the costs of using cooperation and to facilitate their future realization, we collaborated with Prof. C.-C. Shen (Delaware) on a realistic evaluation of cooperation in a networking context.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 23, 2009
- Accession Number
- ADA496212
Entities
People
- Leonard J. Cimini Jr.
Organizations
- University of Delaware