网络仿真工具NS的培训文档剖析.pptVIP

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * NS_LOG_COMPONENT_DEFINE (FirstScriptExample); 是指將 first.cc 檔取名為 FirstScriptExample ，並利用 LogComponentEnable(參數一, 參數二)，開啟 參數一 的 log?功能，再利用參數二設定等級，所以LogComponentEnable(FirstScriptExample, LOG_LEVEL_INFO) 設定了 FirstScriptExample 的 log 等級為 LOG_LEVEL_INFO。 * * * * * * * * * * * * * * * Building Your Script You can now run the example * Building a Wireless Network Topology Add the Wifi and the mobility modules The network topology illustration follows: * Building a Wireless Network Topology For enabling or disabling logging components and for changing the number of devices created * Building a Wireless Network Topology Part of the Wifi network Configure the PHY and channel helpers Yet Another Network Simulator M. Lacage and T. R. Henderson, “Yet Another Network Simulator,” WNS2 ns-2: The IP Network Simulator, Italy, 2006. /files/wns2-yans.pdf * Building a Wireless Network Topology Create a channel object and associate it to our PHY layer object manager NqosWifiMacHelper object to set MAC parameters rate control algorithm AARF (Adaptive Auto-Rate Fallback ) algorithm * Building a Wireless Network Topology The SSID of the infrastructure network Create the wifi devices of these stations * Building a Wireless Network Topology Configure the AP (access point) node Shares the same set of PHY-level Attributes (and channel) as the stations * Building a Wireless Network Topology Set some Attributes controlling the “position allocator” functionality * The number of objects layed out on a line. Building a Wireless Network Topology Need to tell them how to move RandomWalk2dMobilityModel random direction random speed Rectangle (double _xMin, double _xMax, double _yMin, double _yMax) * Building a Wireless Network Topology Want the access point to remain in a fixed position during the simulation Protocol stacks * Building a Wireless Network Topology assign