1 Assignment Requirements
Mervan Call Center Services Ltd (MCCS) is an individual assignment. Students will be supplied with a wireless network design requirement and will be asked to produce a controller-based wireless LAN design. Students will also be required to write an essay critically evaluating the wireless LAN technologies of the design.
a) The user requirements should be studied and analysed carefully.
b) Your design should be based on quantitative analysis of the user requirements and reasonable assumptions, and you should adopt the latest WLAN technologies, especially wireless LAN controller and 802.11ac.
c) You should also include a logical diagram showing all networking devices, servers, and connections among them.
d) You must compare and contrast two different WLAN design methods:
wireless LAN controller based WLAN design, and autonomous AP based wireless LAN design. You should also critically evaluate those related technologies, including WLAN controller, CAPWAP and DTLS, user authentication – EAP and PEAP methods, 802.11n and 802.11ac.
You are supplied with a complex floor plan, the results of a site noise survey and a list of business requirements. Students will be required to design a solution, specify the required equipment, provide a series of design diagrams, and present in report format.
(Word limit of up to 3000).
1.1. Guidelines of the design process:
Step 1 Data collection
When dealing with data collection, consider the following questions:
– What are the needs of the customer?
– What applications will be used over the WLAN?
– What bandwidth do these applications require?
Step 2 Load and coverage
The following questions should be answered when dealing with load and coverage.
– What is the total number of potential wireless clients on the network?
– How big of an area has to be covered by the wireless LAN?
– A diagram or sketch of the coverage area is required with this section.
Step 3 Bandwidth and throughput
The following should be dealt with in regard to bandwidth and throughput.
– What actual bandwidth speed is required by the wireless networking
– How will this bandwidth requirement be achieved with the chosen AP
– Cell size
– Data rate settings
– High speed technologies like 802.11ac
Step 4 Mobile Users
When dealing with WLANs, the demands of mobile users must be considered:
– Will the users need to roam about the coverage area?
-Will they require seamless roaming?
– What kind of design can be used in the topology to accomplish these objectives?
Step 5 Power Consumption
What kind of power settings will be used on the wireless clients to conserve power
when and if they need to be mobile and roam about the facility?
Step 6 Interference
The following steps must be taken when dealing with potential interference to the WLAN:
– Identify the typical sources of RF interference for the type of industry that the WLAN application is being designed for.
– Provide possible options or solutions for each type of interferences.
1.2. Guidelines for evaluation:
After you finish the design process, the proposed network needs to be evaluated
against the following four criteria.
1. It must have high availability;
2. It must be scalable;
3. It must be manageable;
4. It must be an open architecture allowing integration with third-party equipment.
5. It must be ready for VoIP Service – Throughput, Capacity, Latency.
1 Background to this Operational Requirement
Mervan Call Center Services Ltd (MCCS) is a call centre company which has bought a new building. The Manager, Mr Smith, is aware about the advantages and the flexibility offered by Wireless Networks in the work place. He has decided to use WLAN technologies in the building in order to give MCCS a significant advantage over the competition. The WLAN will form a central part of the MCCS ‘s Information Technology strategy for the next couple of years. The WLAN components and infrastructure should adhere to national and international wireless communications standards.
2 Topology and layout
Scale plans of the ground and first floor of MCCS’s new building are shown in appendix A and B. The plan shows a main and secondary building, both of two floors. The plans show as well the results of a noise survey, there is significant over spill from two other wireless networks on channels 8 and 11. At the moment MCCS has 265 employees all of whom require wireless access from their laptop computers.
1. All staff must be able to connect to the network from anywhere within the two buildings. Please assume that it is not feasible to extend the cable from the main building to the secondary (small) building.
2. All computers should be networked so that internal and external Email can be supported.
3. ALL staff must have both Internet Access and the access to internal network.
4. Guests and visitors will be provided only Internet Access from conference room, and they will not be allowed to access the internal network.
5. Sales databases and accounts can only be accessed by authorized staff (see next page.)
6. All servers required (including DNS server, DHCP server, E-mail server, Radius server, etc.) to allow the network to function need to be provided.
5 Staff Primary Location/Function
Office Number of staff Applications
Admin 2 Office, Sales DB, Accounts
Management 4 Office, Sales and customers DB
Sales & Marketing 6 + (2 part-time) Office, Sales DB
Accounting & Payroll 3+3 Office, Accounts
Data Processing 8 Office, Sales and customers DB
IT Support 4+ (2 part-time) Office
Human Resources 5+2 Office, employees DB
Mail Room 1 Office
Reception 1 Office
Maintenance 3 Office
Room A 80 Customers and marketing DB, CallOnIP
Room B 30 Customers and marketing DB, CallOnIP
Room C 50 Customers and marketing DB, CallOnIP
Room D 60 Customers and marketing DB, CallOnIP
Training Room 1 Customers and marketing DB, CallOnIP
Note: all employees have access to the email application.
CallOnIp is the major application of the call centre:
– CallOnIP is a VoIP application
– It will be used by marketing and all the agents in rooms A, B,C and D as well as the training room.
– Most of the stations will be connected to the wired networks. However, the manager would like to give the entire employee the possibility to be mobile, and to use the wireless networks when needed.
– The new network design should be ready to use any VoIP application.
– The manager is thinking about using the first floor of the second building to install a new calling room. He prefers to not extend the wired network to the second building, and to use only the wireless network to give the employees
access to the different network services of the main building.
– The minimum required speed is 6 kbps (equivalent to skype call to a landline or mobile number)