7303SDM How would you evaluate its performance? What performance parameters you would consider for the evaluation?

Part A -Part A of this examination is based a potential real-life application scenario.

Instructions - You should complete BOTH questions from Part A

Problem statement -Wireless technologies such as, Bluetooth, UWB, Zigbee and Wi-Fi could be employed for sensing and communication applications in various contexts. However, the selection of these technologies depends on various factors such as the type of application, resource requirement etc. In an attempt to make their trains intelligent, Elfstom Ltd a train manufacturing company intends to deploy a range of wireless sensors and communication technologies in their train carriages.

The purpose of the sensors is to collect various ambient parameters such as temperature, lighting, number of currently available seats and luggage space etc, in each carriage, in real-time and transmit the information to the driver`s dashboard and the display at the train stations as the train pulls into each station. This is so that the commuters waiting for the station will know which carriages have space suitable for their needs prior to boarding the train. The data collection by the sensors and associated processing, and the communication to different points need to be managed by a processor in the engine management system. The vital characteristic of this intelligence system is dynamic self-organisation/self-configuration i.e. the system should function well irrespective of number of carriages added or taken out at stations.

Potential technologies to consider:

Temperature sensors to sense temperature in each carriage.

`Seat occupancy sensor`/Camera system to provide the number of seats occupied.

`Bluetooth` for short range communication of simple data collected by the sensors.

`WiFi` to support communication from each carriage to the processor and or engine dashboard.

`Zigbee` to provide asset management and network of different device.

Question 1 -Write a case study of the above scenario, not exceeding two pages, to describe:

1.1 How would you apply the above technologies for the potential application?

1.2 The reasons for the suitability of each technology for the function considered.

1.3 What are the assumptions that need to be considered for this application scenario?

Question 2 -2.1 Give a schematic network topology diagram you may consider for the above implementation.

2.2 How would you evaluate its performance? What performance parameters you would consider for the evaluation?

Part B -Part B of this examination consists of a series of questions on a range of topics.