Assingments % - Penrith City Council Unwires

In this assessment you are required to explore the given case study and provide a solution, employing the latest wireless communication techniques. The assessment will help in developing an understanding of communication in wireless networks and the limitations and challenges.

Case Study: Penrith City Council Unwires

Penrith City Council’s charter is to equitably provide community services and facilities to the city of Penrith in Sydney’s west. To do this, the council employs some 1000 full-time and contract staff, who carry out a wide range of roles. While about half of them fulfil management and administration roles in the head office complex, the remainder do not work in the office and many also work outside of regular business hours; these include road maintenance staff, building inspectors, general repairers, and parking officers. With multiple department buildings, a mobile workforce, and a geographically diverse community to serve, the council was looking to improve their communications network to enable them to operate more efficiently by streamlining communication, lowering costs, and boosting productivity. Faced with a flourishing community, limited budgets and ever-increasing demands for services and information, Penrith City Council realised its existing IT infrastructure was holding them back. At the time, the three buildings to be connected by wireless were connected via ISDN at a 64K data transmission rate. With rapidly growing information needs, these links were proving unworkable due to network connectivity problems, unreliable response and speed issues hampering productivity. To share information between departments across the offices, staff were burning large files onto CDs and manually transferring the data, because sending information via the network or email was unreliable and slow. The decision to move to a wireless network was a strategic one for the council, as Richard Baczelis their IT Manager explains; “Located among thick bushland and separated by a river, networking our office buildings has always been a challenge. To solve this, I saw the huge potential of wireless technology; not only to help us today but also to position us well for the future.”

The scope of this report is to develop a wireless network solution for building 1 of the three buildings. The building structure is given in figure 1. The building already has broadband connectivity installed and the scope of the solution will be constrained. The building contains several wireless devices (Printer, Laptop, CCTV) that require high-speed Internet connectivity.

The proposed solution must consider the following criteria:

• Any area where the employee wishes to use the laptop should be less than 100 meters (almost 300 feet) away from the access point.

• Interference is generated by the cordless phone, CCTV, and microwave.

• The proposed network should be cost-effective and,

• The network should be secure.

• Other users on the office network

Wireless Communication Solution for Penrith City Council

Introduction

Penrith City Council’s decision to upgrade its communications infrastructure to improve efficiency and productivity is a significant step towards modernizing its operations. With a diverse workforce operating in various locations and an increasing reliance on digital communication, the existing IT infrastructure was insufficient for the growing needs of the organization. The solution proposed will focus on developing a wireless network for Building 1, ensuring it meets the specific requirements such as coverage, interference mitigation, security, and cost-effectiveness. This report will explore the challenges, the latest wireless communication techniques, and propose a suitable solution to meet the council’s needs.

Wireless Network Requirements

Area Coverage: The wireless network should cover all areas where employees may need to use their laptops within the building. Since the distance between the laptop and the access point should not exceed 100 meters (approximately 300 feet), the network’s design must account for adequate coverage in all zones, including common areas, meeting rooms, and staff workspaces.
Interference: The presence of devices such as cordless phones, CCTV cameras, and microwaves within the building can create electromagnetic interference that may affect the wireless signal strength and reliability. A robust solution will need to mitigate these interference sources to ensure stable connectivity.
Cost-effectiveness: Given the council’s limited budget, the wireless network solution must be cost-effective without compromising on performance, security, and reliability.
Security: The wireless network should be secure to protect the confidentiality of council data. Secure communication is especially important since the wireless network will be used for business-critical operations, and any breaches could lead to significant vulnerabilities.
Support for Other Users: The network should support not only the laptops but also other wireless devices such as printers, CCTV cameras, and other IoT devices. Ensuring that multiple devices can operate efficiently on the same network is critical to optimizing performance.

Wireless Communication Technologies

The proposed wireless solution will focus on implementing the latest wireless communication techniques that address the challenges and meet the requirements stated. Below are the key wireless technologies and techniques to consider:

Wi-Fi Standards (IEEE 802.11ac or 802.11ax):
- Wi-Fi technology is the most suitable wireless solution for a building environment with multiple users and devices. The latest Wi-Fi standards, 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6), offer faster speeds, greater capacity, and enhanced performance, especially in environments with a high number of connected devices.
- 802.11ac operates on the 5 GHz band, providing higher data throughput, while 802.11ax (Wi-Fi 6) further improves network efficiency, speed, and capacity, allowing it to handle more devices simultaneously. Wi-Fi 6 is particularly useful in dense environments like office buildings, ensuring better performance for multiple devices.
Access Points (APs) and Placement:
- To cover the building’s interior and ensure the laptops can operate within 100 meters of the access point, a sufficient number of Wi-Fi 6 access points should be deployed. These should be strategically placed to ensure comprehensive coverage while avoiding dead zones.
- The APs should be configured to use beamforming technology, which improves signal strength and directionality, ensuring a stronger and more stable connection across the building.
Interference Management:
- To mitigate interference from cordless phones, CCTV cameras, and microwaves, the network can use dual-band access points operating on both the 2.4 GHz and 5 GHz bands. Many interference-causing devices like microwaves and cordless phones typically operate on the 2.4 GHz band, so using the 5 GHz band will reduce the impact of such interference.
- Wi-Fi 6 is designed to handle dense environments and interference more effectively, as it can automatically select the best channel and adjust the network accordingly.
- Additionally, Channel Bonding can be employed to combine multiple channels on the 5 GHz band to improve bandwidth and reduce congestion.
Cost-effective Solutions:
- To keep costs within budget, the council can opt for enterprise-grade, yet affordable, access points. Devices from manufacturers like Ubiquiti and TP-Link offer cost-effective solutions without compromising on essential features such as quality of service (QoS) and security.
- Mesh networks can be implemented if additional coverage is required for the network, ensuring signal distribution throughout the building. Mesh networks also reduce the need for additional cabling and infrastructure costs.
Security:
- WPA3 encryption should be used to ensure the wireless network remains secure. WPA3 is the latest Wi-Fi security protocol, offering enhanced encryption and better protection against password-guessing attacks.
- Network segmentation can be applied to separate traffic between staff devices, printers, and IoT devices (like CCTV), ensuring that sensitive business data remains isolated from non-critical devices. Virtual LANs (VLANs) can be used for this purpose.
- Implementing a firewall and VPN (Virtual Private Network) for remote access will also enhance the network’s security and protect communication between staff working remotely or in different buildings.
Supporting IoT Devices (Printers, CCTV):
- For devices such as printers and CCTV cameras, the network should be designed to handle a high density of connected devices. Wi-Fi 6 is capable of efficiently managing multiple devices, reducing congestion and ensuring that each device receives sufficient bandwidth.
- Quality of Service (QoS) can be configured on the APs to prioritize critical devices like laptops and printers over non-essential devices, ensuring optimal performance for tasks that require high bandwidth.

Proposed Network Design

Based on the requirements and technologies discussed, the proposed wireless network design for Building 1 of Penrith City Council will include the following elements:

Access Point Deployment:
- At least four to six access points will be placed in different areas of the building to ensure that the wireless signal reaches all corners. The placement will avoid physical obstructions and interference zones, providing consistent coverage.
- Access points will be Wi-Fi 6 enabled, supporting dual-band operation (2.4 GHz and 5 GHz) to mitigate interference.
Security Configuration:
- The network will be secured with WPA3 encryption and a VPN for remote users.
- VLANs will be used to separate sensitive traffic from less critical devices (such as CCTV), enhancing security and traffic management.
Interference Mitigation:
- Access points will operate primarily on the 5 GHz band to avoid interference from microwave ovens and cordless phones that typically operate on the 2.4 GHz band.
- Channels will be optimized to avoid overlaps and congestion.
Monitoring and Maintenance:
- Regular network monitoring will be implemented to track performance and identify potential issues.
- Firmware updates will be scheduled to ensure that the network remains secure and up to date with the latest improvements.

Conclusion

By implementing a wireless solution based on Wi-Fi 6 technology, Penrith City Council will address its connectivity issues, mitigate interference, and improve communication efficiency across its staff. The deployment of dual-band access points, coupled with robust security protocols and network management tools, will ensure a cost-effective, secure, and scalable solution. The network will not only improve current operations but also position the council for future growth as they continue to serve their community effectively.