Mobility Helper
Decide moving style of the nodes
Random Walk2D Mobility Model
mob.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
"Mode", StringValue ("Time"),
"Time", StringValue("100s"),
"Speed", StringValue ("ns3::UniformRandomVariable[Min=10|Max=90]"),
"Bounds", StringValue ("-500|500|-500|500"),
"Direction", StringValue ("ns3::UniformRandomVariable[Min=0|Max=7]"));