Proximity-Aware Superpeer Overlay Topologies

  • Gian Paolo Jesi
  • Alberto Montresor
  • Ozalp Babaoglu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3996)


The concept of superpeer has been introduced to improve the performance of popular P2P applications. A superpeer is a “powerful” node that acts as a server for a set of clients, and as an equal with respect to other superpeers. By exploiting heterogeneity, the superpeer paradigm can lead to improved efficiency, without compromising the decentralized nature of P2P networks. The main issues in the construction of superpeer-based overlays are the selection of superpeers, and the association between superpeers and clients. Generally, superpeers are either run voluntarily (without an explicit selection process), or chosen among the “best” nodes in the network, for example those with the most abondant resources, such as bandwidth or storage. In several contexts, however, shared resources are not the only factor; latency between clients and superpeers may play an important role, for example in online games. This paper presents SG-2, a novel protocol for building and maintaining a proximity-aware superpeer topology. SG-2 uses a gossip-based protocol to spread messages to nearby nodes and a biology-inspired task allocation mechanism to promote the “best” nodes to superpeer status. The paper includes extensive simulation experiments to prove the efficiency, scalability and robustness of SG-2.


Task Allocation Distribute Hash Table Virtual Space Online Game Powerful Node 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Gian Paolo Jesi
    • 1
  • Alberto Montresor
    • 2
  • Ozalp Babaoglu
    • 1
  1. 1.Dept. of Computer ScienceUniversity of BolognaItaly
  2. 2.Dept. of Information and Communication TechnologyUniversity of TrentoItaly

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