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In a mobile ad hoc network (MANET), each of the mobile node needs to perform address autoconfiguration itself, due to the absence of any centralized server in the network. The address autoconfiguration is defined as the job of assigning the IP addresses automatically to every new node. The objective of an autoconfiguration protocol is to minimize the communication overhead required for configuring...
We study a novel scheme to manage networks with heterogeneous traffic efficiently under resource crunch. We consider different types of revenue models for different service classes. We show that degradation of services and redistribution of resources while satisfying QoS under resource crunch can improve both availability and revenue.
This paper investigates the practical and economic aspects of building a multiple link failure resilient optical network using ITU-T standards based shared mesh protection schemes. Our results show that practical deployments of multiple link failure resilient networks are feasible using standards based shared mesh protection at a cost typically lower than 1+1 protection scheme, while enforcing sub-SOms...
This paper describes the evolution of photonic integration technology towards energy efficient optical transport networks. This paper evaluates the impact of Photonic Integration technology on optical transport network design and shows that the Photonic Integration technology not only makes the network energy efficient but also reduces the TCO (total cost of ownership) and simplifies the network design...
We propose a multi-layer energy saving technique for optical core networks that aims at reducing energy consumption by powering off components in different layers of the network After obtaining satisfactory results in saving energy by powering off ports in the IP layer in our previous work in this paper we target more savings by considering additional layers in the network. The model proposed in this...
This paper proposes a cooperative spectrum sharing scheme in which multiple antennas of a secondary (aka cognitive) system is exploited to nullify the interference from the primary (aka licensed) to secondary system and vice versa. The secondary system also acts as a "decode-and-forward" relay for the primary system thus boosting its performance. The performance of primary and secondary...
Quantum key distribution (QKD) protocols form a natural choice for encryption in optical networks. All the QKD protocols use errors caused due to random measurements by Eve to detect her presence. In this paper, we present a fundamental limitation of using such bases to detect an eavesdropper in two QKD protocols — the BB84 and the new quantum Diffie-Hellman key exchange protocol. It is shown that...
Information and Communication Technology (ICT) proliferation has led to widespread use of cloud-computing services. ICT constitutes a significant portion of the worldwide energy consumption, and reduction in operating energy expenditures is a high priority for cloud-service providers. Spatial and temporal variations in electricity price can be exploited to reduce the operating cost. One approach is...
A circularly polarized dual band micro strip patch antenna for vehicular wireless communication at 2.45 GHz and 5.5 GHz is designed and studied its performance. To obtain the circular polarization, slots have been introduced at the sides of the rectangular patch. Axial Ratio bandwidth of 700 MHz and 230 MHz at lower (1.9 GHz-2.6 GHz) and higher (5.4 GHz-5.63 GHz) frequency bands are observed using...
We have investigated the performance improvement of cooperative free space optical (FSO) communication over single input single output (SISO) system in this paper. Bit error rate (BER) analysis for gamma-gamma channel model, pointing error and additive white Gaussian noise (AWGN) has been demonstrated for SISO and cooperative system, as well as, where the performance improvement with different combining...
In this paper, we present Carrier Interferometry (CI) spread OFDMA system with orthogonal subcarrier grouping (CI/GO-OFDMA) to support variable rate user classes. This work highlights the application of CI codes which can be generated for any integer to ensure efficient multicarrier variable rate transmission scheme. Simulation results obtained over pedestrian channel clearly shows that BER performance...
6LoWPAN standard enables efficient integration of low power wireless networks with IPv6. However the security requirements of 6LoWPANs are high due to undefined deployment scenarios and constrained capabilities of sensor nodes. A number of schemes have been devised for secure communication over the Internet, PKI being the most widely used of them. It provides authentication, non-repudiation, confidentiality...
Social networking applications are changing the way people communicate with their peers and family. Social networking applications have several features that help in connecting one to another, from finding old friends to browsing for new friends and contacts. To harness the true power of social networking, sometimes it may be important to seamlessly identify and connect individuals who are geographically...
In this paper, we present an opportunistic interference alignment (IA) scheme for cognitive multi-user (MU) multiple-input multiple-output (MIMO) relay networks. We consider a secondary relay network with 2 K communicating nodes without direct link between any two nodes, and hence, nodes use a common relay for communicating with each other. Using the proposed scheme secondary user opportunistically...
In this paper, I study the receiver synchronized time division multiple access (TDMA) in the presence of propagation delay deviation, which is one of the major parameter to consider for underwater wireless sensor networks. First I describe how the receiver synchronized TDMA protocol can be used in a network without propagation delay deviation. Then I modify the receiver synchronized TDMA to get higher...
The paper proposes cognitive learning technique for predicting the destination in a video conference being held over an organizational network. The dataset comprised of 22801 connectivity records of video conferences held during the year 2010–2013. Naive Bayes, k-NN and decision tree were trained on the dataset and the performance of the learning algorithms were evaluated. The destination has been...
This paper proposes a novel Microstrip Antenna for body Wearable Wireless Devices (WWD) used for monitoring bio signals in human body. The antenna finds immense application in health monitoring utilizing WWD in Sports, Medicine and monitoring military personnel where monitoring bio- signals is the prime objective. Ultra wide band (UWB) technology adequately meets power, size and distance considerations...
The international treaty, United Nations Framework Convention on Climate Change (UNFCCC) has the objective to ‘stabilize greenhouse gas concentrations in the atmosphere’. To comply with the requirements of UNFCCC, India has to mitigate the climate change and the Indian telecom industry can be a major contributor to this. The telecom industry in India has been the lifeline for connecting the people...
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