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Multi-dimensional packet classification is often the performance bottleneck for network devices. For low-cost high performance embedded networking applications, the best solution could be doing packet classification by specially designed hardware which can effectively release the burden of system CPU. We have realized a compact FPGA-based packet classification coprocessor in an embedded system using...
Energy efficient data collection protocols are required in order to better manage the limited energy, memory and processing capabilities of sensor networks. In applications where data are collected in real time, efficient management of sensor radio assumes critical significance because communication is energy intensive. Moreover, specialised sensors exist which consume even more energy than radio...
In this paper, we analyze the throughput performance of a new access protocol, called Cooperative Access with Relay's Data (CARD) for multi-rate wireless local area networks (WLANs). CARD allows remote source nodes to transmit their information at a higher data rate to Access Point (AP) by using intermediate nodes as relays, particularly, a relay node sends its own data packet after forwarding a packet...
Wireless sensor networks (WSNs) may consist of hundreds or thousands of low-cost sensors, which makes it difficult for a central fusion center to oversee every sensor node. In this paper, we are interested in the problem of signal detection using WSNs. We propose a distributed framework for cross-layer design which is not only suitable to such application, but scalable with respect to the network...
In this paper, a TDMA-based Medium Access Control protocol (GMAC) for wireless sensor networks is proposed. We use global time synchronization and data gathering tree as the foundation of the protocol to form a contention free network for applications that sensors send packets to the sink. To assign time- slots and frequency channels for nodes, a distributed resource allocation strategy is designed...
Proposes an integrated security framework based on the security demands of business applications on mobile network. Features of the framework includes: (1) supports various mobile communication protocols, and can automatically switch to the most appropriate security channel in according with link status and user demands, (2) provides multi-element authentication mechanism to reduce the risk of terminal...
In this paper, we propose a new medium access control (MAC) protocol, called relay with integrated data (RID) for multi-rate wireless networks. RID allows remote nodes to transmit their information at a higher data rate to destination node by using intermediate nodes as relays. In RID protocol, a relay node encapsulates its own data packet and the data packet from a source node and sends both of them...
In this paper, a TDMA-based medium access control protocol (GMAC) for wireless sensor networks is proposed. We use global time synchronization and data gathering tree as the foundation of the protocol to form a contention free network for applications that sensors periodically send packets to the sink. To assign time-slots and frequency channels for nodes, a distributed resource allocation strategy...
In this paper we present empirical results from a study, examining the effects of environmental diversity on vehicle-to-vehicle link in vehicular ad hoc networks (VANET). And packet loss rate (PLR) and received signal strength indicator (RSSI) of the wireless link are measured. The results of the measurement indicate that environment affects the quality of the wireless link in VANET greatly; the average...
Ethernet technologies are rapidly gaining importance as a prevailing solution for carrier networks. Ethernet ring protection switching, defined in ITU-T Recommendation G.8032, provides a means of achieving carrier network requirements for ring network topologies. This article outlines the novel concepts in this Ethernet ring protection switching mechanism and discusses the fundamental operating principles...
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