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Traditional networks rely on aggregate routing and decentralized control to achieve scalability. On the contrary, software-defined networks achieve near optimal network performance and policy-based management through per-flow routing and centralized control, which however face scalability challenge due to (1) limited TCAM and on-die memory for storing the forwarding table and (2) per-flow communication/computation...
A cyclic mobile social network (MSN) is a new type of delay tolerant network, in which mobile users periodically move around, and contact each other through their carried short-distance communication devices. In this paper, we introduce utility-based routing into cyclic MSNs, and propose a deadline-sensitive utility-based routing model. If a message is successfully delivered to its destination before...
Wireless sensor networks (WSNs) have been widely deployed for environmental monitoring and urban sensing applications. With the advancement of mobile phones, mobile users have increasing demands for sensing data relevant to their locations and activities. It is crucial to support reliable ubiquitous sensing for mobile users to retrieve sensing data of their interests anytime and anywhere. In this...
Adaptive QOS routing algorithm (DAQR) based on discrete particle swarm algorithm for wireless sensor networks is proposed to solve the problem that the existing QOS routing algorithms can't take count into both adaptive ability and network energy consumption in room environment. In the work, different QOS parameters are defined as different optimization objects on the research basis of AIRE and WAIER...
Large amount of range-free localization algorithm are depended on sensor nodes densely deployed in an isotropic area. The study of localization problem is in the precondition of a mapping function between measured distance and Euclidean distance for pair of sensor nodes. If the sensors are deployed in an anisotropic network such as concave area, traditional assumption of isotropic sensor network will...
For extending the lifetime of sensor networks by improving load balancing in wireless sensor networks, the cluster-based multi-path routing protocol, CLBM, has been studied in this paper. In CLBM, theory of space and time localization has been introduced in the process of cluster head reselecting, cluster node will select the cluster head according to residual energy and the nearest distance between...
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