Sajal K. Das

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WCA: A Weighted Clustering Algorithm for Mobile Ad Hoc Networks

Mainak Chatterjee, Sajal K. Das, Damla Turgut
Cluster Computing
2002

In this paper, we propose an on-demand distributed clustering algorithm for multi-hop packet radio networks. These types of networks, also known as ad hoc networks, are dynamic in nature due to the… (More)

Avoiding Energy Holes in Wireless Sensor Networks with Nonuniform Node Distribution

Xiaobing Wu, Guihai Chen, Sajal K. Das
IEEE Transactions on Parallel and Distributed…
2008

In this paper, we investigate the theoretical aspects of the nonuniform node distribution strategy used to mitigate the energy hole problem in wireless sensor networks (WSNs). We conclude that in a… (More)

Coverage and connectivity issues in wireless sensor networks: A survey

Amitava Ghosh, Sajal K. Das
Pervasive and Mobile Computing
2008

Sensing coverage and network connectivity are two of the most fundamental problems in wireless sensor networks. Finding an optimal node deployment strategy that would minimize cost, reduce… (More)

Data Collection in Wireless Sensor Networks with Mobile Elements: A Survey

Mario Di Francesco, Sajal K. Das, Giuseppe Anastasi
TOSN
2011

Wireless sensor networks (WSNs) have emerged as an effective solution for a wide range of applications. Most of the traditional WSN architectures consist of static nodes which are densely deployed… (More)

On generalized fat trees

Sabine R. Öhring, Maximilian Ibel, Sajal K. Das, Mohan Kumar
IPPS
1995

11 e antroduce and analyze a neu' fanialy of multiprocessor anterconnection net ulorks. called generalized fat trees, whach Include a5 specaal cases the fa t trees us( d f o r the connecizoii machznc… (More)

Channel Assignment Strategies for Multiradio Wireless Mesh Networks: Issues and Solutions

Habiba Skalli, Samik Ghosh, Sajal K. Das, Luciano Lenzini
IEEE Communications Magazine
2007

Next-generation wireless mobile communications will be driven by converged networks that integrate disparate technologies and services. The wireless mesh network is envisaged to be one of the key… (More)

An on-demand weighted clustering algorithm (WCA) for ad hoc networks

Mainak Chatterjee, Sajal K. Das, Damla Turgut
GLOBECOM
2000

We considera multi-cluster, multi-hop packet radio network architecture for wir elesssystemswhich can dynamically adapt itself with the changing network configurations. Due to the dynamic nature of… (More)

LeZi-Update: An Information-Theoretic Approach to Track Mobile Users in PCS Networks

The complexity of the mobility tracking problem in a cellular environment has been characterized under an informationtheoretic framework. Shannon’s entropy measure is identified as a basis for… (More)

Efficient Data Collection in Wireless Sensor Networks with Path-Constrained Mobile Sinks

Shuai Gao, Hongke Zhang, Sajal K. Das
IEEE Transactions on Mobile Computing
1992

Recent work has shown that sink mobility along a constrained path can improve the energy efficiency in wireless sensor networks. However, due to the path constraint, a mobile sink with constant speed… (More)

How smart are our environments? An updated look at the state of the art

Diane J. Cook, Sajal K. Das
Pervasive and Mobile Computing
2007

In this paper we take a look at the start of the art in smart environments research. The survey is motivated by the recent dramatic increase of activity in the field, and summarizes work in a variety… (More)

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