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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).  
     
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  CS Programme  
     
 
MR SEET BOON CHONG
Expertise: Mobile ad hoc networks, routing and location management
     
Mobile P2P Computing
     
Project Advisor
(Singapore)
:
Assoc Prof Lee Wee Sun
     
Duration :
May 2004 to May 2005
     
 
 

Project Abstract:

Research on Peer-to-Peer (P2P) computing has recently extended to the mobile paradigm, where peers are now mobile computing devices with wireless communication capabilities. Compared to the wired Internet environment, P2P computing in the mobile environment brings forth a number of new challenges. Among the key challenges include: (1) Relatively unstable and variable wireless connectivity; (2) Heterogeneity and limited resources of mobile devices, such as in operating power, storage, and processing speed;

To mitigate the connectivity issue, we propose a two-tier Mobile Ad Hoc Network (MANET), in which mobile vehicle fleets such as city buses form the higher tier that serves as a communication backbone for lower tier peer devices. Previous studies have shown that the
regularity and predictability of the bus traveling pattern are properties that can be used to establish a mobile backbone that offers an element of stability to the wireless connectivity. With this underlying stable networking infrastructure, P2P applications may be deployed with greater ease and better performance in a mobile environment (e.g. in terms of search and download success).

To resolve the problem of inefficiency and performance bottlenecks caused by some less capable or resource limited peers, we further leverage on the presence of buses, by allowing them to participate in the system as “super peers”. Unlike”ordinary peer devices such as PDAs, which are constrained by size and power, vehicular peers are less physically constrained and hence can have greater resource capacity for managing queries and responses of ordinary peers. Detrimental effects on performance by less capable peers can therefore be minimized. A detailed design for a super-peer based structured P2P system based on mobile fleets has been proposed.

 
     
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