在高密度无线通信环境中,经常会遇到不可预料的不利条件,如间歇的连接中断,高比率的数据错误及碰撞,这些情况将导致无线媒体访问控制协议的性能大大降低,例如开槽ALOHA/TDMA和DS/CDMA。如果在协议中采用自适应技术,会很好地减小这些不利情况对系统的影响,提高吞吐率。由此便产生了Adaptive TDMA和Adaptive CDMA,以下将简称为A-TDMA和A-CDMA。 In high-density wireless communication environments, unpredictable adverse conditions, such as intermittent connection interruptions, high data error rates, and collisions, often result in drastic reductions in the performance of wireless media access control protocols such as slotted ALOHA / TDMA and DS / CDMA. Adopting adaptive technology in the protocol will reduce the impact of these adverse conditions on the system and improve the throughput. As a result, Adaptive TDMA and Adaptive CDMA are generated, which will be referred to as A-TDMA and A-CDMA hereinafter.