Question 2 [Total: 25 Marks] a) Discuss the hidden terminal problem in context with wireless sensor networks. How does the hidden terminals affect the performance of wireless sensor network, Diagram should be used to support the answer? b) Explain how the problem of hidden terminals can be resolved [8 Marks] c) i. ii. 111. [7 Marks] Consider the wireless sensor network topology which has been implemented as shown in Fig. Q2 (c) identify the optimal routes for source A to sink M according to the following criteria that describe how you compute the cost for the optimal route. The numbers X/Y along each link indicate the latency (X) and energy cost (Y) for transmitting a single packet over the link. The number Z under each node indicates the node's remaining energy capacity. Minimum number of hops Minimum energy consumed per packet Maximum average energy capacity (eliminate hops that would result in a higher average but unnecessarily add to the route length!) iv. Maximum minimum energy capacity V. Shortest latency (e) shortest latency A [10 Marks] 3/5 4/1 B H K 1/1 3 4 2/2 1/2 2/2 6 5 1/3 5/5 E G 1/2 3/3 7 4 1/1 3/1 1/1 3/1 1/2 2/1 2/2 2/1 F I L 8 8 2 4 Fig. Q2 (c) M