论文部分内容阅读
在无线/有线混合网络中,传统TCP把所有的分组丢失简单归因于网络拥塞的盲目性严重影响了异构网络中TCP的性能。在对当前丢包区分算法分析的基础上,提出了一种采用fuzzy逻辑进行丢包区分的方法来解决这个具有明显fuzzy特征的问题,即采用条件概率构造不同丢包模式下的隶属度函数,从而按照最大隶属原则进行丢包原因区分,基于此方法,提出了一种适合无线环境的TCP拥塞控制算法。仿真验证表明,该算法较当前主要TCP版本及典型区分算法具有更为理想的效果。
In wireless / wired hybrid networks, the traditional TCP simply attributes all packet losses to the blindness of network congestion, which severely affects the performance of TCP in heterogeneous networks. Based on the analysis of current packet loss classification algorithm, a method of fuzzy packet loss classification is proposed to solve this problem with obvious fuzzy features, that is, conditional probability is used to construct membership functions in different packet loss modes. According to the principle of maximum subordination, packet loss reason is distinguished. Based on this method, a TCP congestion control algorithm suitable for wireless environment is proposed. The simulation results show that the proposed algorithm has more ideal effect than the current main TCP version and typical distinguishing algorithm.