【摘要】 <正> 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。更多还原

【Abstract】 This paper focuses on application of adaptive techniques in wireless protocols with examples of A-TDMA and A-CDMA. Their performances are analyzed and explained by data from simulation models. Furthermore, this paper shows shortcomings of A-TDMA and A-CDMA. At last , a model in which they are bound to IP is introduced.更多还原