Low-Cost Wireless LAN Design for Davis Networks Inc.
This paper presents a comprehensive proposal for implementing a cost-effective wireless local area network (WLAN) for Davis Networks Inc. The design leverages five wireless access points with omnidirectional and directional antennas to extend high-speed internet connectivity from a central Computer Center building to surrounding facilities within 500–1,000 meters. The proposal emphasizes affordability (USD 800–1,000), security through VPN and firewall architecture, scalability via centralized authentication, and user accessibility through infrastructure mode networking. Key components include IP table-based firewalls, DHCP servers, DNS forwarders, and a pinger system running on Linux. The paper outlines requirements analysis, site surveys, system design, testing, installation, and operational support planning while addressing security vulnerabilities in WEP encryption and proposing alternatives such as LEAP and VPN integration.
- Introduction and Network Overview: Wireless LAN proposal for Davis Networks Inc.
- Wireless Technology Background and Infrastructure Mode: 802.11 standards and infrastructure mode networking
- Project Goals and Design Objectives: Ease of use, scalability, cost, and security goals
- System Architecture and Firewall Implementation: Dual-homed firewall and discovery process
- Project Deliverables and Security Framework: Firewall components, encryption, and network protection
- Implementation Timeline and Recommendations: Deployment schedule and optimization feedback
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What makes this paper effective
- Clearly structured proposal format with distinct sections for introduction, requirements, design, implementation, and deliverables that guide readers through the complete project scope.
- Concrete technical specifications—five wireless access points, 802.11b/g protocols, 2.4 GHz frequency band, specific firewall components (IPTable, DHCP, DNS forwarder)—demonstrate engineering rigor and measurable implementation criteria.
- Addresses real-world constraints explicitly: obstacles like electric poles and trees, interference from spectrum scarcity, documented weaknesses in WEP encryption, and practical solutions (VPN, alternative protocols, bandwidth management).
- Balances cost sensitivity with security requirements, showing how centralized authentication and dual-homed firewall architecture achieve affordability without sacrificing audit trails or access control.
Key academic technique demonstrated
The paper employs problem-solution framing within a formal proposal structure. Rather than presenting isolated technical details, each component (wireless access points, firewall architecture, security protocols) is introduced by identifying a specific constraint or vulnerability it solves. For example, WEP weaknesses trigger discussion of LEAP and VPN alternatives; spectrum interference prompts explanation of 802.11g advantages; scalability concerns justify centralized authentication design. This approach makes technical choices transparent and justifiable.
Structure breakdown
The paper follows standard technical proposal architecture: (A) Introduction with summary, related work review, and project rationale establishes context; (B) Goals and Objectives (ease of use, scalability, low cost, security) define success criteria; (C) Project Deliverables detail infrastructure, firewall components, and implementation timeline. Within sections, subsections use descriptive headings (e.g., "Infrastructure Mode," "Discovery Process," "Firewall Components") to signal shifts between conceptual background and operational specifics. Citations are distributed throughout to anchor claims in published research and standards documents.
Introduction and Network Overview
Summary
This proposal outlines the development of an affordable local area network for Davis Networks Inc. The project aims to provide wireless internet connectivity to all users on desktops and laptops from the organization's existing high-speed connection at a cost between USD 800 and USD 1,000, including installation expenses such as wiring. Implementation will require careful planning to address physical obstacles such as electric poles, trees, and walls. The Computer Center building will serve as the core location, offering the highest connection speeds, with distribution extending to surrounding buildings located 500 to 1,000 meters away.
The network design incorporates five wireless access points (WAP) equipped with omnidirectional antennas (labeled A, B, C, D, E) and two directional antennas (X and Y). The Computer Center will host one WAP with one omnidirectional and one directional antenna. Directional antenna X will communicate with directional antenna Y, while omnidirectional antenna B provides intermediate support. All access points will operate in repeater mode, with each broadcasting signals to laptops, computers, and other devices within range. Weaker access points receive signal support from stronger ones to ensure consistent coverage. As per best practice, a market survey will be conducted to identify products offering the highest cost-benefit ratio. Alternative approaches, such as maintaining a wired network backbone or integrating fiber optics to increase bandwidth, may be considered if needed. Low-gain antenna WAPs can also be positioned to cover clusters of neighboring buildings (Deep, Kush & Kumar, 2010).
Review of Related Work
Multiple Radio Access Technologies (RATs) currently exist in the wireless communication landscape, including GSM/GPRS, UMTS, IEEE 802.11-based wireless LAN (Wi-Fi), and IEEE 802.16-based Wireless Metropolitan Area Network (WiMAX). Future mobile communication systems will operate in heterogeneous wireless environments, delivering seamless communication with adaptive quality of service and integrated service management. In such multi-technology settings, coordinating Radio Access Networks (RANs) presents significant challenges. The Next Generation Mobile Networks (NGMN) framework provides recommendations to standardization bodies and manufacturers for achieving cost-effectiveness in integrated mobile communication systems. NGMN divides recommendations into three groups: functional recommendations enabling service providers to offer flexible services; cost-efficiency recommendations; and guidance for deployment suitability evaluation. The NGMN expects integrated networks to maximize resource exploitation by supporting multiple RATs. Session Initiation Protocol-based subsystems may be implemented to control network access and service functions (Luo & Bodanese, 2008).
Contemporary homes increasingly feature multiple wireless access points and laptops with wireless capabilities, and this trend is expected to continue as costs decline. However, the IEEE 802.11 standard supports only three non-interfering channels, causing performance degradation due to interference from multiple wireless devices. Spectrum scarcity may become a critical issue in the future. Addressing this challenge requires active monitoring of spectrum usage in specific locations and efficient allocation of spectrum resources as wireless devices demand them (Li & Liu, 2005).
Project Rationale
Wireless technology has revolutionized cost-effective and popular solutions for educational and business environments. This proposal seeks to create an affordable wireless local area network tailored to Davis Networks Inc.'s budget and timeline constraints. Wireless technology adoption has accelerated across consumer and professional domains, from TV remotes and vehicle locks to radio, Wi-Fi, and mobile phones. Enhanced worker mobility allows personnel to access information electronically while traveling globally. The past two years have witnessed widespread adoption of wireless networking and mobile telephony, with these devices increasingly integrated into internet-connected networks. Traditional objections to wired networks—delays, expenses, and installation hassles—have driven adoption of wireless solutions by both homeowners and enterprises. Wireless networks offer lower cost and superior throughput compared to wired alternatives, explaining their exponential growth in communities, homes, businesses, and public spaces. High-speed internet is now accessible globally rather than remaining a luxury.
Two primary mobile wireless network variants exist: infrastructure networks and infrastructure-less (ad hoc) networks. The wireless networking market is expanding rapidly as organizations discover the advantages of wireless deployment. Wi-Fi affords users greater mobility, critical for operations in warehousing, manufacturing, transportation, airports, hotels, colleges, and convention centers. Within business environments, WLANs are essential for public areas, conference rooms, and branch offices. Davis Networks Inc. possesses the competency to execute this comprehensive Wi-Fi rollout.
Implementation Framework
Requirements Analysis involves defining technical requirements and specifications that form the foundation of wireless network design.
System Design encompasses selecting the optimal system architecture, wireless technologies, configurations, and products to meet all requirements.
Site Surveys identify suitable locations for wireless access points and nodes, analyze current radiofrequency interference, assess mounting assets, and evaluate existing wired distribution systems.
System Testing verifies network installation through test plan development and execution, ensuring signal coverage, security, supportability, and performance requirements are satisfied.
System Installation involves planning installation activities, training installers, and supervising deployment. Recommendations may be provided for reputable installers if outsourcing is necessary.
Security Assessments evaluate network security by reviewing network configuration and conducting penetration tests.
Expert Troubleshooting diagnoses wireless network problems through system behavior observation, protocol analysis, and radiofrequency testing.
Operational Support Planning develops ongoing support plans for wireless networks, assesses current support capabilities, creates troubleshooting decision trees for support staff, and identifies necessary tools and recommendations for optimal network support.
Project Management coordinates enterprise wireless network deployment and manages all project operations. Activities include requirements definition, design, installation, testing, and support plan implementation.
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