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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...
Most of the MAC and routing protocols proposed for wireless ad hoc networks are based on omni-directional antenna. Omni-directional antenna distributes energy in all directions, not only causing unnecessary interference to other nodes, but also reducing the potential range of the transmission. In this paper, we propose a novel medium access control and routing protocols for wireless ad hoc networks...
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...
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