4th International ICST Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks

Research Article

Achievable Performance Improvements Provided by Cooperative Diversity

  • @INPROCEEDINGS{10.1109/WIOPT.2006.1666462,
        author={Stephan  Bohacek},
        title={Achievable Performance Improvements Provided by Cooperative Diversity},
        proceedings={4th International ICST Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks},
        publisher={IEEE},
        proceedings_a={WIOPT},
        year={2006},
        month={8},
        keywords={},
        doi={10.1109/WIOPT.2006.1666462}
    }
    
  • Stephan Bohacek
    Year: 2006
    Achievable Performance Improvements Provided by Cooperative Diversity
    WIOPT
    IEEE
    DOI: 10.1109/WIOPT.2006.1666462
Stephan Bohacek1,*
  • 1: University of Delaware, Newark, DE 19716
*Contact email: bohacek@udel.edu

Abstract

This paper examines the achievable performance gains when a particular class of cooperative relaying known as best-select is employed. In essence, best-select seeks to improve performance by exploiting diversity. We closely examine a particular topology when the number of nodes is finite as well when the node density goes to infinity. Determining the performance is complicated by the correlation of the channel gains between nearby channels (i.e., when the receivers are nearby and the transmitters are nearby). This challenge is overcome by modeling the channels as spatially continuous diffusion processes and as a random field and then using a Poisson clumping heuristic. In the example network and metric studied, it is found that in the limit, node cooperation can provide an increase in the end-to-end performance by 35 dB (i.e., a factor of ∼3000) in a 5-hop network. This result motivates further work in the design of multihop cooperative protocols.