使用Omnet ++从同一源节点生成定期消息

Question

我有一个给定的网络，其节点具有以下两种方法：

void Txc13::initialize()
{
    // Module 0 sends the first message
    if (getIndex() == 0) {
        // Boot the process scheduling the initial message as a self-message.
        TicTocMsg13 *msg = generateMessage();
        simtime_t delay = par("delayTime");
        scheduleAt(simTime()+delay, msg);
    }
}

void Txc13::handleMessage(cMessage *msg)
{
    // we do some casting to access the fields inside the message
    TicTocMsg13 *ttmsg = check_and_cast<TicTocMsg13 *>(msg);

    if (ttmsg->getDestination() == getIndex()) {
        // Message arrived.
        bubble("ARRIVED!");
        delete ttmsg;
    }
    else {
        // We need to forward the message.
        forwardMessage(ttmsg);
    }
}

这很好。一旦离开节点0（getIndex()==0）的消息到达其预期的目的地，模拟就会结束。

现在，我愿意触发一些node0之后离开delay的消息。

延迟按指数分布network.tic[*].delayTime = exponential(10s)。

如何触发来自同一节点的多条消息？

谢谢！

Answer 1

好的，我想我明白了。这是这两种方法的代码。在initialize方法中，我创建了一条event消息，该消息最初是在t=0处触发的。

void Txc13::initialize()
{
    // Create the event object we'll use for timing -- just any ordinary message.
    event = new cMessage("event");
    // Module 0 sends the first message
    if (getIndex() == 0) {
        scheduleAt(0.0, event);
    }
}

在handleMessage方法中，我检查传入消息是否为event。如果是这样，我确实会等待simtime_t delay = par("delayTime")的访问，该getIndex() == 0会按指数分配，并发出另一个自消息并转发该消息本身。

由于我希望所有消息都从node0开始，因此我也用void Txc13::handleMessage(cMessage *msg) { if (msg == event and getIndex() == 0){ TicTocMsg13 *msg = generateMessage(); simtime_t delay = par("delayTime"); scheduleAt(simTime()+delay, event); forwardMessage(msg); } else { // we do some casting to access the fields inside the message TicTocMsg13 *ttmsg = check_and_cast<TicTocMsg13 *>(msg); if (ttmsg->getDestination() == getIndex()) { // Message arrived. //EV << "Message " << ttmsg << " arrived after " << ttmsg->getHopCount() << " hops.\n"; bubble("ARRIVED!"); delete ttmsg; // Generate another one. //EV << "Generating another message: "; //TicTocMsg13 *newmsg = generateMessage(); //EV << newmsg << endl; //forwardMessage(newmsg); } else { // We need to forward the message. forwardMessage(ttmsg); } } } 进行了检查。

Order

通过此操作，我获得了以下elog，您可以欣赏到每个事件之后都会转发一条消息。