Wireless-phy.cc

最新推荐文章于 2019-03-21 00:05:33 发布

iteye_20809

最新推荐文章于 2019-03-21 00:05:33 发布

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分类专栏： NS2 文章标签： F#

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本文探讨了在cpp代码中实现的一种干扰模型。该模型通过计算接收信号和干扰信号之间的相互作用来评估数据包接收的成功率。文章详细介绍了如何在接收到的数据包上计算干扰效果，并更新其错误状态。

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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.