Samir K. Sadhukhan

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a r t i c l e i n f o Security breaches adversely impact profit margins, market capitalization and brand image of an organization. Global organizations resort to the use of technological devices to reduce the frequency of a security breach. To minimize the impact of financial losses from security breaches, we advocate the use of cyber-insurance products.(More)
—In real-life scenario where users mostly know their destinations a priori, their movement is not purely random (as assumed in random walk model); rather it is somewhat direction-based and depends on the present location and the final destination. For instance, an office goer often returns home in the evening (i.e., mobility is diurnal). While no existing(More)
Search in cyclic AND/OR graphs was traditionally known to be an unsolved problem. In the recent past several important studies have been reported in this domain. In this paper, we have taken a fresh look at the problem. First, a new and comprehensive theoretical framework for cyclic AND/OR graphs has been presented, which was found missing in the recent(More)
In conventional UMTS cellular networks, during deployment usually a set of NodeBs is assigned to one Radio Network Controller (RNC), and a set of RNCs to one Serving GPRS Support Node (SGSN) for data services, as well as to one Mobile Switching Centre (MSC) for voice services. Operators thus far have considered single-homing of RNCs to MSCs/SGSNs (i.e.,(More)
2.5 cellular network topology involves grouping of NodeBs into Radio Network Controllers (RNCs), RNCs into serving GPRS support nodes (SGSNs), and RNCs into mobile switching centres (MSCs), so as to minimize the total cost of operation (TCO) including equipment cost, cable cost, installation cost, cost of call setup and handoff cost. The problem has been(More)
Keywords: Dynamic spectrum management Decision support system Cooperative game theory Bankruptcy game Shapley value t-value a b s t r a c t Next generation wireless technologies offer various services from voice call to full motion pictures and even to high speed internet access. Consequently, the service providers (SP) armed with different wireless(More)
We consider a scenario where a single service provider (SP) owns multiple access networks (ANs) of different (not necessarily competing) technologies. It employs an entity, called spectrum controller (SC), which manages the common pool of spectrum and is responsible for distributing the spectrum to individual ANs in a fair manner. Since the available(More)
This work proposes a novel dynamic and adaptive yet fair spectrum allocation policy to be adopted by a service provider (SP). Here, we consider a scenario where a single SP owns multiple access networks (ANs) of different (not necessarily competing) technologies. We conceive that an SP employs an entity, called local spectrum controller (LSC), which manages(More)