Implementation of a Modified Wireless Sensor Network MAC Protocol for Critical Environments

Table 1

Scenarios to compare both MAC protocols.

	Scenario	CSMA	CSMA/WSD
1		Result output; (i) 1 transmission; (ii) 16 retransmissions; (iii) Backoff time increases exponential; (iv) Resolving time: 327.767 sec	Result output; (i) 1 transmission; (ii) 16 retransmissions; (iii) Backoff time increases exponential; (iv) Resolving time: 327.818 sec
2		Result output was the same as in scenario 1	Result output was the same as in scenario 1
3		Result output; (i) Successful transmission in one attempt; (ii) Resolving time: 0.04028 sec	Result output; (i) Successful transmission in one attempt; (ii) Resolving time: 0.04028 sec
4		Result output was the same as in scenario 1	Result output was the same as in scenario 1
5		Result output was the same as in scenario 3	Result output was the same as in scenario 3
6		Result output was the same as in scenario 1	Result output was the same as in scenario 1
7		Result output was the same as in scenario 1	Result output; (i) 16 retransmissions; (ii) Backoff time stays constant; (iii) Resolving time: 0.85815 sec
8		Result output was the same as in scenario 1	Result output was the same as in scenario 1
9		Result output was the same as in scenario 1	Result output was the same as in scenario 7
10		Result output was the same as in scenario 1	Result output was the same as in scenario 1
11		Result output was the same as in scenario 1	Result output was the same as in scenario 7
12		Result output was the same as in scenario 1	Result output was the same as in scenario 1
13		Result output was the same as in scenario 1	Result output was the same as in scenario 7
14		Result output was the same as in scenario 1	Result output was the same as in scenario 1
15		Result output was the same as in scenario 3	Result output was the same as in scenario 3
16		Result output was the same as in scenario 3	Result output; (i) Successful transmission in one attempt; (ii) Resolving time: 0.05008 sec; (iii) Time for neighbour-Ack at the end required
17		Result output was the same as in scenario 3	Result output was the same as in scenario 16