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The emerging paradigm of network function virtualization advocates deploying virtualized network functions (VNFs) on standard virtualization platforms for significant cost reduction and management flexibility. There have been system designs for managing dynamic deployment and scaling of VNF service chains within one cloud datacenter. Many real-world network services involve geo-distributed service...
The network traffic has been growing explosively in recent years after users can watch the high quality video from the Internet. It is an important issue to reduce network traffic and increase the user quality of experience (QoE). Therefore, there have been in-network caching schemes to cache the content fetched by users in proxy servers. Recently, software defined networking (SDN) was proposed to...
The past century of telecommunications has shown that failures in networks are prevalent. Failure recovery processes are therefore needed. Failure recovery is mainly influenced by (1) detection of the failure, and (2) circumvention of the detected failure. However, especially in SDNs where controllers recompute network state reactively, this leads to high delays. Hence, next to primary rules, backup...
Existing NAT solves to IP address exhaustion problem binding private IP address and public IP address, and NAT traversal such as hole punching scheme enables to communicate End-to-End devices located in different private networks. However, such technologies are centralized the workload at NAT gateway and increase transmission delay caused by packet modification per packet. In this paper, we propose...
Pub/Sub communication model becomes a basis of various applications, e.g. IoT/M2M, SNS. These application domains require new properties of the Pub/Sub infrastructure, for example, supporting a large number of devices with widely distributed manner, handling emergency messaging with priority control and so on. In order to meet the demands, we proposed Software Defined Network Aware Pub/Sub (SAPS)...
Networks are experiencing a paradigm shift from textual data to high data rate traffic, especially carrying streaming media. Traditional network architectures can generally not keep up with this change. Software Defined Network architectures try to enable network engineers to more easily develop new transmission architectures. Current approaches of media transport, e.g. as defined by RTSP/RTP, are...
With the mobile network core evolving towards an unlayered and decentralized architecture, distributed mobility management appears to be more compatible and efficient with the flattened networks. In this paper, we propose a new approach to realize the distributed mobility management using the software defined networking techniques instead of the existing mobility management protocols. The mobility...
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