Hi thank you for your ansswer but me i want to know if it is possible to know this informations in NS2 (network simulator),can i know for exemple at 2.5 s which the nodes are neighbors of node number 5,is there a methode in NS2 to know the neignbors during the time of simulation??? Please i ask this question a lot of times in ns forum,and i am not good at englesh perhaps you don't understand me ,but if you can help me,i will be very glade,just a small indication,can help me,please don't hesitate. thanks a lot
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