Networking and Communication Engineering

Yamini Saini ¹, Suresh Kumar ¹, Deepak Sharma ¹

Affiliations
1 UIET MDU, Rohtak, Haryana, IN

Abstract

Wireless technologies grow rapidly, as the heterogeneous network is integrated in fourth generation. The fourth generation needs seamless handoff between different network wireless communications. All users in the whole world would like to be connected without any wired connection anytime anywhere throughout the best network. Vertical handover has various parameters such as: Available Bandwidth, RSS, QOS, Power consumption, Security, Monetary Cost, User preference etc. on which handover decisions depends. Vertical handoff is done at different access technology when mobile switch from one network to another e.g. VHO is the handover between cellular networks and WLAN. The algorithms are necessary to design so that user get the required Received Signal Strength (RSS) & Quality of Service (QoS). Vertical handover decision depend upon velocity of the mobile node and provide seamless communication better performance when move from one network to another. In this paper, we introduce algorithm on RSS& QOS based vertical handoff are discussed. The algorithm we use is adaptive lifetime based vertical handoff. The algorithm combines RSS and estimated lifetime ( estimated lifetime is the expected time after which the Mobile Terminal will  capable to assert its connection with WLAN) to determine the vertical handover an  algorithm is a traveling distance prediction method that works for wireless LAN and cellular network and vice versa[1].The simulation performed on MATLAB2007b software.

Keywords

Handover, Vertical Handover (VHO), RSS and QOS, VHO Algorithm and Result.

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Sonal Punia ¹, Suresh Kumar ¹

Affiliations
1 UIET, MDU, Rohtak, IN

Abstract

Routing in networks is a challenging issue. In this paper, we assume routing in an All to All communication mode in an N × N grid optical network. Horizontal-Vertical routing has been employed. This type of routing uses the center node to route packets from source to destination, so the load on the center node increases and packet loss starts. To route the packets from same source to destination, alternate paths are followed (without center). In other words load balancing is done to reduce or eliminate the load at over utilized central node and increase the load at under utilized corner or other intermediate nodes. In this paper, through simulation results it has been shown how load balancing reduces the congestion and packet drop rate, which is highly desirable in any kind of network.

Keywords

Center Node, Congestion, Grid Optical Network, Load Balancing, Over Utilization.

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