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Dive into the research topics where Rajiv K. Vijayakumar is active.

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Featured researches published by Rajiv K. Vijayakumar.


sensor, mesh and ad hoc communications and networks | 2005

Optimization models for fixed channel assignment in wireless mesh networks with multiple radios

Arindam Kumar Das; Hamed M. K. Alazemi; Rajiv K. Vijayakumar; Sumit Roy

The combination of multiple radio nodes in conjunction with a suitably structured multi-hop or mesh architecture has the potential to solve some of the key limitations of present day wireless access networks that are based on single-radio nodes. This paper ad- dresses the channel assignment problem for multi-channel multi-interface (radio) wireless mesh networks. We focus on static wireless mesh networks where multiple non- overlapping channels are available for each wireless inter- face. In this network environment, our objective is to find a fixed channel assignment which maximizes the number of bidirectional links that can be activated simultaneously, subject to interference constraints. We present two mixed integer linear programming models for solving the fixed channel assignment problem with multiple radios. Detailed computational results on various grid topologies are also presented and discussed.


global communications conference | 2006

WLC30-4: Static Channel Assignment in Multi-radio Multi-Channel 802.11 Wireless Mesh Networks: Issues, Metrics and Algorithms

Arindam Kumar Das; Rajiv K. Vijayakumar; Sumit Roy

The combination of multiple radio nodes in con junction with a suitably structured multi-hop or mesh architecture has the potential to solve some of the key limitations of present day wireless access networks that are based on single-radio nodes. This paper addresses the static channel assignment problem for multi-channel multi-radio static wireless mesh networks. We present four metrics based on which mesh channel assignments can be obtained. In particular, we focus on minimization of the average and maximum collision domain sizes and show that these problems are closely related to problems in combinatorial optimization such as MAX k-CUT and MIN k- PARTITION. We also present heuristic algorithms for solving the channel assignment problems using the above two metrics.


Archive | 2010

Adaptively streaming multimedia

Sayeed Z. Choudhury; Rajiv K. Vijayakumar; Idreas Mir


IEEE ACM Transactions on Networking | 2009

Optimizing 802.11 wireless mesh networks based on physical carrier sensing

Hui Ma; Rajiv K. Vijayakumar; Sumit Roy; Jing Zhu


Archive | 2010

System and method of performing domain name server pre-fetching

Idris Mir; Rajiv K. Vijayakumar; Samson Jim; Mark Bapst


Archive | 2010

System and method for optimizing media playback quality for a wireless handheld computing device

Sayeed Z. Choudhury; Rajiv K. Vijayakumar; Idris Mir


Archive | 2012

Cooperative loading of webpages based on shared meta information

Mark Bapst; Bojin Liu; Rajiv K. Vijayakumar; Nela Gurevich


Archive | 2006

Optimizing 802.11 Wireless Mesh Network Performance Using Physical Carrier Sensing

Sumit Roy; Hui Ma; Rajiv K. Vijayakumar; Jing Zhu


Archive | 2010

Method and Apparatus for Receiving Display Limited Web Page Content

Jan E. Hanssen; Rajiv K. Vijayakumar; Mark Bapst


global communications conference | 2007

Modelling Throughput and Starvation in 802.11 Wireless Networks with Multiple Flows

Anna Margolis; Rajiv K. Vijayakumar; Sumit Roy

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Sumit Roy

University of Washington

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Hui Ma

University of Washington

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