中文说明：多址接入协议仿真。ALOHA协议由于数据包之间的碰撞而导致性能下降，CSMA协议能够提供较高的容量，但它应用于无线通信系统时，容易受到“隐终端”问题的影响。而ISMA协议通过中央基站控制移动终端的数据包传输，降低了数据包之间发生碰撞的概率以及隐终端问题。
English Description：
Simulation of multiple access protocol. The performance of ALOHA protocol is degraded due to the collision between packets. CSMA protocol can provide high capacity, but when it is applied in wireless communication system, it is vulnerable to the problem of "hidden terminal". ISMA protocol controls the transmission of mobile terminal packets through the central base station, which reduces the probability of collision between packets and the hidden terminal problem.