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Wireless sensor networks have a wide range of applications including target detection and tracking, environment monitoring, industrial process monitoring, hospital monitoring, and public utility service. A sensor network consists of a large number of sensor nodes and a few sink nodes to collect data from sensor nodes. Sensor nodes and sink nodes form a large scale wireless mesh network in which packets...
The RPL routing protocol published in RFC 6550 was designed for efficient and reliable data collection in low-power and lossy networks. Specifically, it constructs a Destination Oriented Directed Acyclic Graph (DODAG) for data forwarding. However, due to the uneven deployment of sensor nodes in large areas, and the heterogeneous traffic patterns in the network, some sensor nodes may have much heavier...
In order to solve the problem of constrained routing algorithm without capability of dealing with failures, this paper proposes a failure recovery method based on multiple mode protection switching including global protection segment protection and local protection. This method quantifies the performance of three protections switching styles as a protection metric, making use of this metric to computer...
Energy efficiency and data reliability have always been the key problem in WSN. In this paper, firstly, a selection of cluster head algorithm is designed which is able to detect the energy change of nodes, rapidly ascertain new cluster head, and avoid excessive energy consumption between cluster head and cluster nodes. Secondly, differentiated service is introduced in our algorithm which makes achieve...
As more and more mission critical services emerge on the Internet, there is a growing demand for the Internet to provide stringent service availability and reliability. More and more domains adopt multi-homed connection to expect increasing reliability. But the de facto inter-domain protocol - BGP spends a long period to converge to another stable state when one of the links of multi-homed domain...
Maintaining connectivity is a key responsibility of any routing system, but successfully carrying it out can be challenging, especially for inter-domain paths. Many measurements indicate the links failures are fairly common in the Internet. During the period of failures, some destination would be unreachable and the corresponding services unavailable. Shrinking the convergence time window to improve...
In mobile ad hoc networks (MANETs), one of the critical issues consists of the design of routing algorithms that are robust to frequent path disruptions caused by hostspsila mobility. This paper analyzes random walk mobility model, and establishes the relationship between a linkpsilas reliability and current lifetime via a conditional probability model. A path reliable routing algorithm is also developed,...
Recent advances in wireless sensor networks have led to many new routing protocols where energy awareness and reliability are the important consideration. The paper analyzes the cluster-based and gradient-based routing protocol in wireless sensor network. The advantages and limitations of protocols have been found. For improving the ability of protocol, an improved clustering routing protocol is proposed...
This paper proposes a fast forward medium access control protocol (FFMAC) for quality-of-service (QoS) guarantee in multihop IEEE 802.11s wireless mesh networks with multiple channels. To the best of our knowledge, the proposed protocol is the first one which considers the multihop and multichannel issues simultaneously. It provides higher priority for real-time applications, while remaining the distributed...
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