Networking and Communication Engineering

T. Sivakami ¹, S. Shanmugavel ²

Affiliations
1 College of Engineering, Department of Electronics and Communication, Anna University, Chennai-25, IN
2 College of Engineering, Department of ECE, Anna University, Chennai-25, IN

Abstract

Heterogeneous networks are consist of integration of various access technologies such as WI-FI, WI-MAX, 3G/B3G, cellular networks and other services like adhoc networks etc and are expected to provide seamless roaming across the networks. When the MN switch to one network to other networks, the inter-domain handoff (VHO) involves. The requirements for VHO are power conception, bandwidth, user preferences, velocity, network cost and network latency etc. Such parameters are used to feed as an input factor for an efficient system called fuzzy logic control to obtain overall QOS of the heterogeneous networks. Fuzzy logic control theory used to choose best networks among various access networks. This paper mainly focused on the fuzzy logic algorithms with its input factors that taken into consideration for network selection function (NSF). Finally we evaluated handoff delay performance using NS-2 simulation environment and proposed fuzzy based cross layered architecture for vertical handoff (FUVESHA) to reduce VHO delay.

Keywords

Fuzzy Logic Theory, Handoff Delay, Mobility Management, Vertical Handoff.

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T. Shankar ¹, Vurandala Kiran Kumar ², S. Shanmugavel ³

Affiliations
1 CEG, Anna University, Chennai, Tamil Nadu, IN
2 VIT University, Vellore, Tamil Nadu, IN
3 Department of Electronics and Communication Engineering, CEG, Anna University Chennai, Tamil Nadu, IN

Abstract

This paper is to analyze the coverage and connectivity of Ad Hoc Networks and to enhance the connectivity of the network by using Rician Fading, for this to compute the node isolation probability and coverage with respect to shadowing and fading phenomena in an ad hoc network in the presence of channel randomness. The concentrate on Rayleigh fading and Rician fading for finding the node isolation probability and also MIMO (multiple input multiple output) technique was used to enhance network coverage and connectivity. Further this paper considering Lognormal Shadowing, Rayleigh Fading and Rician Fading to simulates the graphs between the node isolation probabilities versus node density.

Keywords

MIMO, Channel Randomness, Node Isolation.

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