Abstract
As one of the candidates for future network architecture, Information-Centric Networking (ICN) has revolutionized the manner of content retrieval by transforming the communication mode from host-centric to information-centric. Unlike a traditional TCP/IP network, ICN uses a location-independent name to identify content and takes a receiver-driven model to retrieve the content. Moreover, ICN routers not only perform a forwarding function but also act as content providers due to pervasive in-network caching. The network traffic is more complicated and routers are more prone to congestion. These distinguished characteristics pose new challenges to ICN transmission control mechanism. In this paper, we propose an effective transmission scheme by combining the receiver-driven transport protocol and the router-driven congestion detection mechanism. We first outline the process of content retrieval and transmission in an IP-compatible ICN architecture and propose a practical receiver-driven transport protocol. Then, we present an early congestion detection mechanism applied on ICN routers based on an improved Active Queue Management (AQM) algorithm and design a receiver-driven congestion control algorithm. Finally, experiment results show that the proposed transmission scheme can maintain high bandwidth utilization and significantly reduce transmission delay and packet loss rate.
Highlights
Considering that it is difficult to detect congestion accurately only relying on the receiver side in Information-Centric Networking (ICN) [23,24,25], we propose an early congestion detection mechanism based on an improved Active Queue Management (AQM) algorithm applied in ICN routers
We introduce an effective transmission scheme based on early congestion detection which is used in an IP-compatible ICN architecture
We focus on the congestion detection of intermediate routers and propose an improved AQM algorithm according to the queuing delay of packets
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Queue Management (AQM) algorithms in TCP/IP network, and notify the receiver by explicitly marking data packets or negative acknowledgement (NACK) This method is similar to the explicit congestion notification (ECN) in the IP network. The routers do not directly drop packets, so it is difficult to quickly recover from a heavy congestion state [13] They mechanically apply the AQM algorithm of IP network to ICN network, ignoring the difference in traffic between ICN and IP network. In this paper, we fully consider the characteristics of the ICN transmission mode and traffic behavior and propose an effective transmission scheme based on early congestion detection. The proposed transmission scheme includes a receiver-driven transport protocol and a router-driven congestion detection mechanism. We further propose an early congestion detection mechanism applied on ICN routers based on an improved AQM algorithm.
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