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Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path...
SDN is a centrally managed network architecture that automatically and dynamically allocates network resources to different types of workloads according to their application characteristics as well as current network conditions. We note that state-of-the-art SDN measurement mechanisms generally are slow, require reserved network resources, or use protocol-specific information when collecting flow-level...
Energy efficiency has become an important research issue for wireless sensor networks. Sensor nodes, thus, need to make use of their limited energy to keep active time as small as possible to prolong the whole network lifetime while meeting the performance requirement. In this work, we reinvestigate the overhearing problem, which occurs when an awake node overhears the transmission nearby, and this...
Wireless sensor networks have been widely studied in various applications such as environmental monitoring, battlefield surveillance, and intrusion detection recently. One of the important applications is to detect mobile targets (e.g., invaders) by using mobile sensor nodes. Consider a closed region where there are several mobile sensors patrolling and trying to capture targets who are able to sense...
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