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In this work, we focus on designing high-throughput anycast mechanisms in a software Defined Network (SDN), as anycast routing serves as a fundamental building block for many services. Specifically, we investigate two main challenges for efficient implementation of a SDN-based anycast system: high throughput anycast routing (HTAR) and congestion-free anycast reconfiguration (CFAR). For the first challenge,...
Message delivery is one of the challenging issues in opportunistic networks because of the short-lived connectivity environment. To deal with this issue, replication-based routing protocols inject a specific number of multiple message copies into the network to achieve the tradeoff between the delivery probability and overhead. However, in most of the current copy-limited routing algorithms, message...
By leveraging node mobility and exploring a store-carry-and-forward paradigm, delay-tolerant networking enables and assists end-to-end message delivery in many scenarios, e.g., vehicular ad hoc networks and mobile social networks. Most existing work in the literature either focuses on the routing strategies for unicast, or history-based routing for multicast communications. In this paper, we discover...
Data gathering is one of the most basic applications of wireless sensor networks. How to effectively preserve the energy of the nodes in order to extend the network lifetime is a challenging problem in data gathering. Currently, many researches focus on constructing a virtual backbone of the network by using minimum connected dominating sets. Each node in the network can transmit its data to the sink...
Delay tolerant networks (DTNs) characterise a class of emerging networks that suffer from frequent and long-duration partitions. As the storage-carry-forward paradigm is adopted to transfer messages in DTNs, buffer management schemes greatly influence the performance of routing protocols when nodes have limited buffer space. From a network-wide viewpoint, the excessive increase of a single message's...
In some delay-sensitive and durative surveillance applications, in order to gather data at each round, all nodes in wireless sensor networks are organized as a tree rooted at the sink. The tree should be designed carefully to meet the challenges of constraining the data gathering delay and maximizing the network lifetime. The problem of constructing the tree is NP-complete. Moreover, a contradiction...
In the anonymous communication mechanisms based on key infrastructure, public key or pre-shared key are widely used to set up relay paths and negotiate shared keys in session. Therefore, these systems always have complicated architecture and high key management cost. However, key infrastructure is hard to deployed in distributed environment. Based on multi-paths network coding, this paper firstly...
The increasing popularity of the multimedia applications in mobile ad hoc networks (MANETs) has led to research on QoS support for these applications. However, this is difficult in such networks because of factors such as shared and variable wireless bandwidth, limited power supply and possible mobility of the nodes. Much has been done to the quality of service problem of ad hoc networks, and many...
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