ns-3

问题 A Server is connected to an Access point via point to point link of 10Mb/s. PointToPointHelper p2p; p2p.SetDeviceAttribute ("DataRate", StringValue("10Mbps")); wanIpDevices = p2p.Install (ServerNode, ApNode); //only relevant code added How can I change the data rate of this link to 5Mb/s after 100 seconds of simulation. I tried the code below but it didn't work. double timeNow = Simulator::Now().GetSeconds(); Simulator::Run(); if (timeNow==100.0) { p2p.SetDeviceAttribute ("DataRate",

问题 I have a client/server topology in NS3 and I want to calculate the throughput of UDP traffic on the server. This line of code sink = StaticCast<PacketSink> (tcpServerApp.Get (0)); does not work because it can only be used in calculating the throughput of TCP packets. How can I calculate throughput for the received UDP traffic on the server? Thanks 回答1: You can calculate the throughput of UDP packets using the following code. You should use this code after Simulation::Run(); uint64_t rxBytes =

问题 I'm using OpenSSL in my C++ program, and I need to link crypto and ssl with it. If it were for example gcc, I would just pass: -lcrypto -lssl I am adding this dependency in Network-Simulator 3. But I don't know how to do this in WAF. How should I add them as a dependency? 回答1: First you need to check in configure if the library is available, then you can build it. def configure(cnf): # other parameters omitted for brevity cnf.check(lib=["crypto", "ssl"]) def build(bld): # other parameters

问题 I want to simulate a network that is under DDoS TCP SYN Flooding attack and evaluate the performance of a new solution and compare it with other solutions. i was planning to do it using NS3 but i read somewhere in the internet that i can't do it well using a descret event network simulator (NS3 is a descret event network simulator), i want to know why ? and what is the best alternative ? 回答1: Unfortunately, DoS attacks cannot be simulated in ns-3 . By extension, DDoS attacks cannot be

问题 I need to compare different type of TCP using ns-3 for a class project. I am new with ns-3. I don't want to implement a new code. Briefly, I have 2 questions: Which example of ns-3 is the best for my purpose? Tcp-Variants-Comparison.cc ? How can I see the output. I ran the code, but there was no output. 回答1: You can run your example using .waf . Navigate to your ns-3 directory (the place where .waf executable is located) and run: ./waf --run tcp-variants-comparison This will compile (if

问题 I need to compare different type of TCP using ns-3 for a class project. I am new with ns-3. I don't want to implement a new code. Briefly, I have 2 questions: Which example of ns-3 is the best for my purpose? Tcp-Variants-Comparison.cc ? How can I see the output. I ran the code, but there was no output. 回答1: You can run your example using .waf . Navigate to your ns-3 directory (the place where .waf executable is located) and run: ./waf --run tcp-variants-comparison This will compile (if

问题 I need to compare different type of TCP using ns-3 for a class project. I am new with ns-3. I don't want to implement a new code. Briefly, I have 2 questions: Which example of ns-3 is the best for my purpose? Tcp-Variants-Comparison.cc ? How can I see the output. I ran the code, but there was no output. 回答1: You can run your example using .waf . Navigate to your ns-3 directory (the place where .waf executable is located) and run: ./waf --run tcp-variants-comparison This will compile (if

问题 My objective is to create multiple link/channels to connect with different wifi nodes surrounding it. In the example "wifi-simple-adhoc-grid", only one channel per wifi node is created. How can I extend this to multiple channels? 回答1: There are two options: install multiple NetDevices. This configuration is known as multi-radio scenario. have a look at the WAVE module that has support for multi-channel, implementing the IEEE 1609.4. This installs single radio with multi-channel. 来源： https:/

问题 So basically, I used RandomwayPoint model in NS3 and I got the result of nodes like this: /NodeList/5/$ns3::MobilityModel/CourseChange x = 10, y = 20 /NodeList/6/$ns3::MobilityModel/CourseChange x = 30, y = 40 /NodeList/7/$ns3::MobilityModel/CourseChange x = 50, y = 80 /NodeList/5/$ns3::MobilityModel/CourseChange x = 10, y = 20 /NodeList/6/$ns3::MobilityModel/CourseChange x = 30, y = 40 /NodeList/7/$ns3::MobilityModel/CourseChange x = 50, y = 80 /NodeList/5/$ns3::MobilityModel/CourseChange x

问题 I'm newbie with ns3. i wanted to simulate a vanet network with two nodes, in which a node send periodically (each 0.1 second) wsmp packet on the CCH channel. i used the code : wave-simple-device.cc and i did some modification in the following function: ''' void WaveNetDeviceExample::SendOneWsmpPacket (uint32_t channel, uint32_t seq) { Ptr<WaveNetDevice> sender = DynamicCast<WaveNetDevice> (devices.Get (0)); Ptr<WaveNetDevice> receiver = DynamicCast<WaveNetDevice> (devices.Get (1)); const