MTO: MulticastBased Traffic Optimization for Information Centric Networks Traffic optimization in Information Centric Networks (ICN) inevitably involves making full use of innetwork storages. Although ICN provides efficient content delivery and traffic offloading by exploiting nearby cached content and reducing redundant transmissions for same content requests, it inherently follows an opportunistic fashion to utilize innetwork caches. In this paper, we improve network traffic distribution for ICN by leveraging multicasting. Specifically, introducing SoftwareDefined Networking (SDN), a virtual pointbased algorithm is proposed to achieve manytomany multicasting with global optimization. Furthermore, we propose a tunnelbased bandwidth allocation mechanism to improve the scalability of the system. Extensive simulation results show that multicast tree can be constructed optimally and meanwhile our proposal significantly improves network performance in terms of load balancing and network utilization.

Edgeoriented Collaborative Caching in InformationCentric Networking Innetwork caching is a key feature of informationcentric networking (ICN), in which routers take charge of caching passing contents. Such cache design enables efficient content distribution, but the benefit comes at a nontrivial cost, given adding workload to routers. With the emergence of edge computing, more edge devices with large storages are available, which is a good opportunity for new caching design. To this end, we propose a novel Edgeoriented Collaborative Caching (ECC) in ICN. In ECC, edge devices (such as edge server, micro datacenter, etc.) cache contents while routers only maintain cache indexes which are used to redirect subsequent requests towards the cached content. This enables ECC to work in a lightweight and collaborative fashion. We propose an optimization method to properly create cache indexes, considering both content popularity and cache benefit. Moreover, we also present a failure recovery mechanism to ensure system robustness. Simulation results show when deploying the same total cache capacity, ECC outperforms typical ICN caching schemes in terms of response latency, server load and bandwidth consumption of links.