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In this study, we propose an efficient localization scheme in wireless sensor networks. The proposed scheme utilizes mobile anchors and is based on ring overlapping. In a wireless sensor network, there are some nodes knowing their locations, which are called the reference nodes, and the other nodes without the knowledge of their locations are called the blind nodes. Based on the relative RSSI (Received...
Vehicular wireless networks have emerged as a promising wireless communication technology in recent years. Vehicular wireless networks collect information on real-time traffic, such as the road situation, the location of a car accident, etc., which must be delivered to its destination before a set deadline in order to be useful for an Intelligent Transportation System (ITS). Target applications are...
Concurrent access among multiple mobile readers brings about a new problem called reader collision that a readerpsilas transmission is interfered by the others. There have been several works to solve the reader collision problem. While they employ time division, frequency division, space division, or centralized scheduling approach, in this paper, we introduce a cooperative, distributed reader collision...
Among the research community, on-going efforts are being continued to efficiently interconnect MANETs to fixed infrastructure in order to expand the reach of the Internet to Wireless access networks. Such scenario gives raise to a number of challenges that require solutions involving Internet gateway selection scheme, extensions to ad hoc routing technique. In this paper, we depict a network architecture...
Fast transmission speeds and various wired network services have been combined with the convenience and mobility of wireless services. The combination of wired/wireless technologies is spreading rapidly since it enables the creation of new services and provides new features to both users and service providers. In such wired/wireless integrated services, network integration is very important because...
With the emergence of wireless RFID technologies, the problem, of scheduling transmissions in dynamic RFID systems has been arousing attention. In this paper, we present a method of Two Phase Dynamic Modulation (TPDM), which consists of regional scheduling and hidden terminal scheduling phases, aims to efficiently perform communications between readers and tags in high density and mobile RFID networks...
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