OMNET ++, How to pass message between two car in VEINS?
The demo scenario that is used in the Veins tutorial does exactly that. You can find the tutorial on the Veins website, the application code in TraCIDemo11p.cc
finding a memory allocation error with omnet++
You will need to start a debug (or memory checking) run of your simulation using the same command line parameters; otherwise, no model libraries will be loaded and your simulation will not execute. Note that, independent of how you start the debug or memory checking run of your simulation, you...
Changing model parameters by cPar in other module
Declaring your parameter as volatile should solve your problem. But for future reference I'll provide further explanation below Volatile vs. non-volatile: Here it depends how you want to use this parameter. Mainly via the .ini file you have two types of parameters: volatile and non-volatile. volatile parameters are read every...
header file error with omnet++
Veins 3 still uses the MiXiM build system, which first builds a "base" library and then builds a "modules" library (both libraries are dynamically linked for running a simulation). The "base" library is meant to be dependent only upon components stored in the "base" folder, so when compiling the "base"...
Transmission of vehicular status in Veins
To achieve your goal you have to use the TraCIMobility component of Veins. You can do that by first getting a pointer to that component in the initialize() method of your node cModule *tmpMobility = getParentModule()->getSubmodule("veinsmobility"); mobility = dynamic_cast<Veins::TraCIMobility*>(tmpMobility); ASSERT(mobility); Once you have the mobility component you can query it...
How to change a parameter value over time?
For volatile parameters there is a pretty easy trick. Use the ? : operator along with the simTime() NED function: **.interArrivalTime = simTime() < 30s ? exponetntial(400ms) : exponential(800ms) or you can even chain them as ?: operator is evaluated left to right: **.interArrivalTime = simTime() < 30s ? exponetntial(400ms)...
Navigation hierarchy error in omnet: Simulation terminated with exit code: 139
c++,segmentation-fault,omnet++,inet
You are getting this error because you are trying to dereference a Null pointer. You are getting a Null pointer because the module name "xyz[123]" given to getSubmodule does not exist. It does not exist because the number in square brackets is not part of the submodule name, but its...
Overriding Functions with omnet++
you have two versions of AODVRouting::handleMessage(cMessage *msg) function. One in AODVRouting.cc coming from #include "AODVRouting.cc" and one in your current file of which you have pasted the code but we don't know the name. Either remove #include "AODVRouting.cc" line from your current file or rename your class so it does...
How to use scheduleAt funcion in VEINS
You can use both functions just like you (probably) did way back in the Tic Toc tutorial. Just overload or amend the base functions for handling messages (and, if you overload a method, don't forget to call the base implementation of your superclass)
How do I take actions every step in Veins?
You can take advantage of the fact that SUMO updates the positions of all vehicles at exactly the same time. By extension, Veins (I am assuming you are using version 4a2) will update the OMNeT++ positions of all vehicles at exactly the same time. See the Veins tutorial demo application...
How do I find a car's vehicle type in Veins?
You are right: this method is not implemented - you will need to implement it yourself. The following code might help... std::string TraCICommandInterface::getVehicleTypeId(std::string nodeId) { return genericGetString(CMD_GET_VEHICLE_VARIABLE, nodeId, VAR_TYPE, RESPONSE_GET_VEHICLE_VARIABLE); } ...
Node creation or apperance at run time in Omnet (INET)
The OMNeT++ User Manual has a section dedicated to this. According to this you don't need buildInside() and scheduleStart() when using createScheduleInit(). An example how this is performed can be seen in the Veins framework - more precisely in the TraCIScenarioManager. The important lines for you are probably: cModule* parentmod...
Changing .cc file doesn't affect the simulation
Finally, I did make makefiles and make again and I could see the changes. Maybe it isn't the best way...but if I just clean the project some errors appear and I can't run it anymore unless I do what I said above.
Send the same message to several hosts (Broadcast in Ethernet LAN)
I can think of two possible ways to achieve broadcast: Broadcast functionality offered by the module you are using Broadcast as given in the OMNeT++ manual For the first one, if I assume that you are simulating a network, there is usually a broadcast IP in real networks. Maybe that...
OMNET++ Tkenv/GUI doesn't appear anymore
Tkenv stores the last used window layout in a file ".tkenvrc" in the directory containing your simulation. Maybe deleting this file (thus restoring the default layout) helps.
Omnet access method of another submodule error - no matching function for call to ‘check_and_cast(cModule*&)’
Well I figure out the problem. First thing I needed to add header file of mobility module in my current sub module to get the definitions. So I included- #include "MassMobility.h" #include "StationaryMobility.h" then in code I did following modification:- cModule* parentmod = getParentModule(); cModule* mobilitymod = parentmod->getParentModule()->getSubmodule("mobility"); MassMobility* massMobilityMod...
error in final step of veins tutorial
Your system seems to run another program that tries to connect to TCP port 9999. Independent of whether you are running this program knowingly or if it is malware, either shutting down the conflicting program or changing the sumo-launchd.py port number will help. See the sumo-launchd.py documentation for how to...
What are the units of distance in the MiXiM based Veins simulation scenarios?
The unit returned by the commandDistanceRequest() is in m (meters) Link: Two types of coordinate systems are currently in general use in geography: the geographical coordinate system and the rectangular (also called Cartesian) coordinate system. SUMO and OMNeT++ use Cartesian coordinates both. However in SUMO the y axis is...
Omnet Tkenv run config for mulitple paramter: executing only the first value of patameter
In order to run all combinations of sendInterval values you should write * (asterisk) in "Run number" field.
How can I convert an IPv4Address to char in omnet++(inet)?
Judging by the definition of IPv4Address in the source code of INET v2.99.1, I would say that its str() method can provide the text representation as a std::string. If you need a char* you can call the string's c_str() method.
ASSERT condition for driving vehicles in Veins failed
Commenting out the ASSERT is totally fine. In SUMO any vehicle can have one of five states (according to statesvehicleStates_sm.uxf): first, it is loaded, transitions to running when it starts driving, then transitions to arrived when it arrived at its destination. In addition, running vehicles can temporarily become teleporting or...
How to read value from `Link` between two nodes using omnet++
It seems like you are using a custom module called Link as your channel, which you seem to have given a cost parameter. Getting to this cost parameter from a Node requires three steps: For getting which Link channels are connecting a Node to its neighbors, you need to first...
Broadcasting of Messages in Veins example
In its basis the 802.11p standard, which is the main communication standard for Vehicular Communication (and also the one used in Veins), does broadcast. So basically, whatever you send via a 802.11p network interface, it will always be broadcasted, however you can make-up some type of p2p by doing "source-destination...
Calculating end-to-end delay for SimpleServerApp in Veins-LTE
Since version 4.1 OMNeT++ introduced the concept of statistics/metrics collection and recording using the signal mechanisms. In brief the signal mechanism works as follows: a given value is attached to a (built-in object of type) signal and this information is recorded to output files (either as scalars or as vectors)...
OMNeT++: Changes is .cc class definition do not apply in simulation
The problem was solved by removing the .exe file created in the source folder before each new simulation. Apparently, my computer is not able to automatically remove the current .exe file during simulation and I therefore have to do it manually.
“socket.error: [Errno 98] Address already in use” in heterogeneous example on veins-lte
I get the following error (in the SUMO log): "socket.error: [Errno 98] Address already in use" If I am not mistaken, this is an error message from Python. It is not an OMNeT++ error, nor is it an error message that SUMO would output. My guess is that you...
RoadId() from the BaseWaveApplLayer.cc (VEINS, OMNET++)
There is the class TraCICommandInterface which provides access methods for such data like getRoadId(). In the class TraCIDemo11p you can find an example how to get this information. It basically boilds down to performing the following steps: TraCIMobility* mobility = TraCIMobilityAccess().get(getParentModule()); TraCICommandInterface* traci = mobility->getCommandInterface(); TraCICommandInterface::Vehicle* traciVehicle = mobility->getVehicleCommandInterface(); traciVehicle->getRoadId();...
OMNeT++ disassembling received messages
You need to cast the incoming message to the appropriate type and then can access all the member variables of the message class: #include "ServerMsg_m.h" ... void Server::handleMessage(cMessage *msg) { String a; String b; ServerMsg *pkt = check_and_cast<ServerMsg *>(msg); a = pkt->a; b = pkt->b; } ...
Running parallel simulations
Config Examinataion In your case you can perform config examination. OMNeT++ offers different options for that. They are explained under the Parameter Studies section of the OMNeT++ manual. So you can try one of the following options to examine your configs and thus config file: ./run –a - will show...
How to activate logs at every node in omnet++
Create a global int variable such as sentPackets in the node class which will keep track of the packets that are sent. And in order to inspect it later on, use the WATCH() macro. More info: http://www.omnetpp.org/doc/omnetpp/manual/usman.html#sec295...