An accurate retransmission timeout estimator for content-centric networking based on the Jacobson algorithm  

作　　者：Mortaza Nikzad Kamal Jamshidi Ali Bohlooli Faiz Mohammad Faqiry 

机构地区：[1]Faculty of Computer Science,Kabul Polytechnic University,Kabul,Afghanistan [2]Faculty of Computer Engineering,University of Isfahan,Isfahan,Iran

出　　处：《Digital Communications and Networks》2022年第6期1085-1093,共9页数字通信与网络（英文版）

摘　　要：Accurately estimating of Retransmission TimeOut (RTO) in Content-Centric Networking (CCN) is crucial for efficient rate control in end nodes and effective interface ranking in intermediate routers. Toward this end, the Jacobson algorithm, which is an Exponentially Weighted Moving Average (EWMA) on the Round Trip Time (RTT) of previous packets, is a promising scheme. Assigning the lower bound to RTO, determining how an EWMA rapidly adapts to changes, and setting the multiplier of variance RTT have the most impact on the accuracy of this estimator for which several evaluations have been performed to set them in Transmission Control Protocol/Internet Protocol (TCP/IP) networks. However, the performance of this estimator in CCN has not been explored yet, despite CCN having a significant architectural difference with TCP/IP networks. In this study, two new metrics for assessing the performance of RTO estimators in CCN are defined and the performance of the Jacobson algorithm in CCN is evaluated. This evaluation is performed by varying the minimum RTO, EWMA parameters, and multiplier of variance RTT against different content popularity distribution gains. The obtained results are used to reconsider the Jacobson algorithm for accurately estimating RTO in CCN. Comparing the performance of the reconsidered Jacobson estimator with the existing solutions shows that it can estimate RTO simply and more accurately without any additional information or computation overhead.

关 键 词：Content-centric networking Retransnissi on timeout Popularity distribution gain Jacobson RTO estimator 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]