An Improved Triggering Updating Method of Interest Message with Adaptive Threshold Determination for Directed Diffusion Routing Protocol

Table 1

Simulation parameters.

Parameter	Symbol	Initial value	Variation range
Deployment density of fixed nodes		1/200 m^2	[1/1000 m^2, 1/100 m^2]
Sensing radius of nodes		10 m	[10 m, 55 m]
Tuning parameter		0.3	[0, 1]
Average velocity of mobile node		1 m/s	(0, 1.25 m/s)
Average direction of mobile node		π/2	(0, π)
Dimension of interest message		1	[1, 9]
Information exchange rate		50%	(0, 100%)