??? # 0 | 0 | 0 ??? # 1 | 0 | 0 ??? # 2 | 0 | 0 ??? # ??? ???
??? set god [God instance] ;# ? ??? ???
??? #使用setdest内部过程引发移动节点运动
??? #在模拟时间200s时,节点1开始从位置(500,500)移动到(500,900),速度为2.0m/s ??? #在模拟时间500s时,节点1开始从位置(500,900)移动到(500,100),速度为2.0m/s ??? $ns at 200.0 \ ??? $ns at 500.0 \ ??? ???
??? #在节点0和节点2之间建立一条CBR/UDP的连接,且在时间为100s的时候开始传送 ??? set udp(0) [new Agent/UDP] ??? $udp(0) set fid_ 1
??? $ns attach-agent $node(0) $udp(0) ??? set null(0) [new Agent/Null] ??? $ns attach-agent $node(2) $null(0) ???
??? set cbr(0) [new Application/Traffic/CBR] ??? $cbr(0) set packetSize_ 200 ??? $cbr(0) set interval_ 2.0 ??? $cbr(0) set random_ 1 ??? $cbr(0) set maxpkts_ 10000 ??? $cbr(0) attach-agent $udp(0) ??? $ns connect $udp(0) $null(0) ??? $ns at 100.0 \ ??? ???
??? #在Nam中定义节点初始所在位置
??? for {set i 0} {$i<$var(nn)} {incr i} {
??? $ns initial_node_pos $node($i) 60 ;#只有定义了移动模型后,这个函数才能被调用 ??? } ??? ???
??? #定义节点模拟的结束时间
??? for {set i 0} {$i<$var(nn)} {incr i} {
??? $ns at $var(stop) \ ;#重新设置移动节点属性 ??? }
??? $ns at $var(stop) \
??? $ns at $var(stop) \NS2 exiting.../\ ??? proc stop {} {
??? global ns tracefd namfd ??? $ns flush-trace ??? close $tracefd ??? close $namfd ??? } ???
??? puts $tracefd \ ??? puts $tracefd \ ??? puts $tracefd \ ??? puts \ ??? ??? $ns run