异构网络中的丢包区分和拥塞控制机制  

Packet Loss Differentiation and Congestion Control in Heterogeneous Networks

作　　者：靳玉宝 董育宁[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《应用科学学报》2015年第3期234-242,共9页Journal of Applied Sciences

基　　金：国家自然科学基金(No.60972038;No.61271233);教育部高等学校博士学科点专项科研基金(No.20103223110001)资助

摘　　要：现有异构网络传输控制协议不能准确估计网络状态,缺乏有效的丢包区分机制.为此,提出一种基于效用估计的丢包区分算法,并将其应用于多媒体业务TCP友好传输控制协议.该算法将网络状态估计算法和差异化丢包区分算法相结合,根据分组到达时间间隔估计当前网络的可用带宽,计算效用参数并估计网络状态,自适应地选取合理的区分机制,以准确区分无线-有线异构网络中拥塞/无线丢失,提升多媒体传输控制协议性能.实验部分比较了该算法与现有文献方法的仿真性能..The existing transmission control mechanism lacks effective method in net- work state estimation and packet loss differentiation. To deal with the problem, this paper proposes a loss differentiation algorithm （LDA）, utility based LDA （UBLDA） capable of estimating the network state （congestion or not） by calculating utility parameters based on the interval of packet arrival and sending rate. UBLDA can choose appropriate differentia- tion scheme based on the state estimation, and integrate with a TCP friendly transmission control protocol. It is a new multimedia transmission control mechanism suitable for wired- wireless heterogeneous networks. Simulations are performed to compare the performance of the proposed algorithm with existing methods.

关 键 词：传输控制 丢包区分算法 异构网络 拥塞控制 TCP友好 

分 类 号：TN919.8[电子电信—通信与信息系统]