Priority Schemes for Life Extension and Data Delivery in Body Area Wireless Sensor Networks with Cognitive Radio Capabilities

Table 2

System design parameters and probabilities.

Parameter	Description
	Probability that a PS node is active in the current frame
	Probability that an SS node successfully detects an event
	Node transmission probability
	High priority node transmission probability
	Low priority node transmission probability
	Total slots for each frame
	Number of nodes reporting in SS
	Number of nodes reporting in PS
	Control parameter
	Initial battery energy
	Residual battery energy
	Energy units consumed by transmitting nodes
	Energy units consumed by non-transmitting nodes
	Energy units in sleep mode node