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  Research Fellows And Research Projects  
  Project abstracts can be viewed from the CD-ROM which is enclosed or the SMA website (http://www.sma.nus.edu.sg).  
     
  AMM&NS Programme HPCES Programme IMST Programme MEBCS Programme  
  CS Programme        
     
  CS Programme  
     
 
DR HU YAHONG
Expertise: Modeling and simulation, automation, peer-to-peer system
     
Adaptive Location Services over Peers Networks
     
Project Advisor
(Singapore)
:
Assoc Prof Hsu Wen Jing
     
Duration :
January 2004 to July 2005
     
 
 

Project Abstract:

Naming and lookup services are essential in any distributed systems for locating resources. Conventional systems use either centralized or hierarchic schemes which often create hot spots in a system. Recent developments in peer-to-peer systems offer new scalable alternatives. Peer-to-Peer systems, or P2P systems for short, are distributed, self-organizing systems without any central authority. Nodes or peers in P2P systems are of equal roles and capacities in sharing resources (including data, computing power etc.), and they can communicate directly with each other. To evaluate different options for the overlay network (i.e. the communication links between the peers), the cost and performance of a design are measured mainly in terms of the node degrees of the overlay network, latency (number of hops) associated with a query and overhead due to the topology-maintenance protocols. Compared with unstructured P2P systems, structured systems offer better performance and are more scalable, but they are less robust. The goal of this project is to design structured P2P systems for efficient lookup service that adapt to dynamic fluctuations in the overlay networks due to nodes’ joining, departure, and failures. We will
design and analyze suitable overlay topologies and protocols for supporting various forms of queries.

 
     
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