Implementing Cooperative Wireless Networks

Towards Feasibility and Deployment
  • Stefan Valentin
  • Hermann S. Lichte
  • Holger Karl
  • Sébastien Simoens
  • Guillaume Vivier
  • Josep Vidal
  • Adrian Agustin

Theory has shown that letting nodes cooperate to construct a virtual multiple-antenna array provides significant performance gains in many scenarios. Many cooperative relaying schemes were proposed using different codes and protocols. While each of these schemes has its individual benefits and employs different methods, all of them are based on common fundamental principles and characteristics. In this chapter we, firstly, provide a discussion and classification of typical state-of-the-art cooperative relaying schemes. Secondly, we focus on putting cooperative relaying into practice.

In theory and practice fundamental problems have to be solved to let nodes benefit from cooperation. So far it is unclear how in mobile scenarios - e.g., cellular, mesh, WMANs, and WLANs – the optimal relaying scheme, partners, and cooperation level can be selected. Furthermore, cooperative relaying requires more complex multiplexing on the Medium Access Control (MAC), which can be realized by different cooperative patterns. We discuss several design paradigms along with their practical advantages and disadvantages, contrast current approaches, and show open issues for cooperation on the MAC sublayer. Based on this discussion we, finally, focus on implementing user cooperative systems. We discuss the state of the art and derive guidelines for implementing future wireless networks that let users benefit from cooperation.

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Copyright information

© Springer 2007

Authors and Affiliations

  • Stefan Valentin
    • 1
  • Hermann S. Lichte
    • 1
  • Holger Karl
    • 1
  • Sébastien Simoens
    • 2
  • Guillaume Vivier
    • 2
  • Josep Vidal
    • 3
  • Adrian Agustin
    • 3
  1. 1.University of PaderbornGermany
  2. 2.Motorola Labs Parc Les AlgorithmesFrance
  3. 3.Technical University of CataloniaSpain

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