中文说明：
根据有无固定基础设施，无线局域网又可分为BSS (Basic Service Set)和IBSS (Independent Basic Service Set)。我们要研究的ad hoc网络属于后者。假设在一个ad hoc网络中，移动节点的发射功率PTx总是恒定的。要发送数据的移动节点总是先监听信道，测量接收到的信号功率X，其中X= I + N, I为接收到的干扰，N是噪声。移动节点只有在X＜INThre时，才可以发射。式中，INThre为背景噪声门限。 在仿真中，我们规定每个移动节点的发射功率是常数，PTx = 1W；接收节点接收机的灵敏度Smin = -80 dBm；信号质量 min = 2 dB；系统的背景噪声门限INThre = 1.2e-10。
English Description：
According to the availability of fixed infrastructure, WLAN can be divided into BSS (basic service set) and IBSS (independent basic service set). The ad hoc network we want to study belongs to the latter. Suppose that in an ad hoc network, the transmission power PTX of mobile nodes is always constant. The mobile node to send data always monitors the channel first and measures the received signal power X, where x = I + N, I is the received interference and N is the noise. The mobile node can transmit only when x < intre. Where inhre is the background noise threshold.