WMAC DESIGN

Aim The aim of this project is to design a Medium Access Control (MAC) protocol for a set of low power wireless (mobile) nodes that have to communicate with a wireless access point. Your design must meet all the objectives required and/or desired by the company. In addition, you are requested to provide critical analysis and adequate justification on your design options. Background and Requirements WeCare Wireless Consulting is a local company that assists organisations or businesses to solve their wireless network problems and other related IT problems. WeCare often looks to experts for assistance. WeCare has recently hired you to help on a new project. Assume that you are requested to design a Medium Access Control protocol for a set of low power wireless (mobile) nodes that have to communicate with a wireless access point. Your constraints are: 1. You can only use FDMA and TDMA like schemes (CDMA is not considered for cost and complexity reasons). 2. The nodes clocks can drift in time by some maximum known value. 3. Nodes can have three modes: Transmit, Listening/Receiving, Sleep. While transmitting nodes consume twice in comparison to when they are receiving. In sleep mode nodes consume 1% power in comparison with transmit mode. Only the mobile nodes are power limited (the access point is not power limited). 4. You have two types of traffic: emergency (delay constrained and requires high reliability: for example alarms), and best-effort traffic (with a time to live. Which means that if the frames are not transmitted within TTL they can be dropped). The emergency traffic is small in comparison with best-effort traffic. You may have different emergency-type connections with different delay bounds. 5. You goal is to design a MAC that satisfies both constraints while maximizing battery life. A. There is no single or simple solution. The goal of this exercise is to make you think about the main issues in WMAC design. Propose one or several schemes. Discuss the limitations of your proposed scheme(s). You can also make additional assumption when comparing schemes. Create a PowerPoint presentation of 10 slides that looks at the proposed wireless MAC. B. Assume now that you may have the same system running in multiple neighbouring locations. Assume also that these systems implement the same protocols but cannot communicate or explicitly cooperate (e.g., each one running in a home and belongs to a different person). What techniques can you use to achieve co-existence? Create another presentation of 10 slides in case the system is running in multiple locations.