Internet Wireless Networks

[Name of the Institute]

Abstract- This paper presents a scenario of wireless network setup in a a new office organization. The organization has installed high technology wireless network with the use of OPNET.Wireless mesh networks (WMNs) have recently emerged to be a cost-effective solution to support large-scale wireless Internet access. Handoff management plays an important role in WMNs in delivering Quality of Service to mobile users. Hence, the analysis of handoff performance in WMNs is in a critical need for network researchers and engineers. Recently, OPNET simulation platform becomes a leading provider of solutions for evaluating network designs and applications. However, there is no formal approach or methodology as to how OPNET can be used to assess the support and readiness of an Internet-based WMN in supporting handoffs incurred by various roaming types. In this paper, we propose detailed simulation models for network topology and elements necessary to construct an Internet-based infrastructure WMN using OPNET, along with the modeling and implementation of two handoff designs considering the special design challenges in WMNs.

INTRODUCTION

Wireless mesh networks (WMNs) are being deployed in many cities in order to provide a cost-effective solution for ubiquitous Internet access. An infrastructure WMN is composed of static mesh routers and mobile mesh nodes. Mesh routers form a wireless multihop backbone network. Some mesh routers function as the gateways and are connected via wired links to the Internet. Mesh routers are dedicated nodes for routing wireless traffic either from mesh nodes to the wired Internet or between mesh nodes. Mesh nodes access the network via a mesh router which serves as the access point (AP) [1].

SCENARIO ANALYSIS: WMN HANDOFF ARCHITECTURE IN OPNET

This section provides an overview of the OPNET technology of wireless network being implemented in a new organization. This organization has built its own building and needs a wirless network system to carry on its operation.

In this section, we first describe the key factors of deploying a WMN network in OPNET. Then, we introduce the components for setting up an IiWMN architecture in OPNET.

A. Network deployment and planning in OPNET in the new infrastructure.

OPNET Modeler can provide different levels of modeling depending on the necessities and requirements of the simulation. OPNET simulations are discrete-event-driven simulations (DES). A simulation in OPNET is divided into three-tired structures, namely network model, node model, and process model. Generally, the simulator comes with a huge library of pre-defined models for various simulations and has the facility for users to define custom models. The GUI feature in OPNET helps to establish an overall environment called a Project. From that Project, the operator can develop several network scenarios in order to evaluate and analyze the performance of that network in different “what-if” circumstances [2].

Fig. 1 shows the workflow for planning and analyzing a WMN in OPNET. The configuration of a customized WMN network model can be produced by utilizing and interacting two basic deployments in OPNET: network and traffic deployment, each of which follows different implementation procedures. In addition, by defining certain ...