Wireless-phy.cc

The main difference is the added interference model.

cpp 代码

if (isInterferenceEnabled()){
    //printf ("pktRx=%ld, p=%ld, expiration=%f, now=%f\n", (long)pktRx_, (long)
    , expiration_, NOW);
    if (pktRx_) {
        if (expiration_ <= NOW) {
            pktRx_ = NULL;
        } else {
            //calculate interference of p onto pktRx_
            //arguments: receiver_type, receiver_freq, t_power, t_distance_rx_tx,
            interferer_type, interferer_freq, i_power, i_distance_rx
            /*
              printf ("R: X=%.2f Y=%.2f, T: X=%.2f Y=%.2f, I: X=%.2f Y=%.2f\n",
              ((MobileNode*)node_)->X(),((MobileNode*)node_)->Y(),
              pktRx_->txinfo_.getNode()->X(), pktRx_->txinfo_.getNode()->Y(),
              p->txinfo_.getNode()->X(), p->txinfo_.getNode()->Y());
            */
            int nberr = Interference::interference((MobileNode*)node_,
                        pktRx_, expiration_ - HDR_CMN(pktRx_)->txtime(), p, NOW);
            int before= HDR_CMN(p)->error();
            HDR_CMN(pktRx_)->error() = nberr>0 || HDR_CMN(pktRx_)->error();
            if (nberr>0)
                printf ("%f nbErr=%d, packet size=%d, error=%d(before=%d)\n", NOW, nberr, HDR_CMN(pktRx_)->size(), HDR_CMN(pktRx_)->error(), before);

        }
    }

I don't understand why "expiration_ " is used here.

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• 2007-05-28 17:06
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