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The Internet Engineering Task Force has developed Mobile IP to handle mobility of Internet hosts at the network layer. Mobile IP, however, suffers from a number of drawbacks such as high handover latency, packet loss, and conflict with network security solutions. In this paper, we describe and evaluate the performance of SIGMA, a Seamless IP diversity based(More)
Key pre-distribution has been claimed to be the only viable approach for establishing shared keys between neighboring sensors after deployment for a typical sensor network. However, none of the proposed key pre-distribution schemes simultaneously achieves good performance in terms of scalability in network size, key-sharing probability between neighboring(More)
Motivated by the observation that channel assignment for multiradio multi-channel mesh networks should support both unicast and local broadcast<sup>1</sup>, should be interference-aware, and should result in low overall switching delay, high throughput, and low overhead, we propose two flexible localized channel assignment algorithms based on(More)
We transform the 3D underwater sensor network (USN) localization problem into its 2D counterpart by employing sensor depth information and a simple projection technique. We first prove that a nondegenerative projection preserves network localizability. We then prove that given a network and a constant k, all of the geometric k-lateration localization(More)
We develop a cellular automata (CA) based key management scheme for wireless sensor networks termed CAB. Our proposed scheme allows sensors to establish pairwise keys during any stage of the network operation using pre-loaded CAs. Additionally, CAB has the following nice properties: i) it is computationally efficient because operations can be as simple as(More)
A fundamental issue impacting the performance of mobile ad hoc networks is the wireless interference among neighboring nodes. In this paper, we derive an interference aware metric NAVC based on the information collected from the IEEE 802.11 Medium Access Control (MAC) layer. We then propose a novel Dynamic Interference Aware Routing protocol (DIAR) building(More)
We develop a practical and comprehensive hybrid rogue access point (AP) detection framework for commodity Wi- Fi networks. It is the first scheme that combines the distributed wireless media surveillance and the centralized wired end socket level traffic "fingerprinting" The former is designed not only to detect various types of rogue APs, but also to(More)
The Internet Engineering Task Force has developed Mobile IP to handle mobility of Internet hosts at the network layer. Mobile IP, however, suffers from a number of drawbacks such as high handover latency, packet loss, and conflict with network security solutions. In this paper, we describe TraSH, a new Transport Layer Seamless Handover solution to mobility.(More)
This paper focuses on designing a distributed medium access control algorithm that aims at achieving time fairness among contending stations and throughput maximization in an 802.11 wireless LAN. The core idea of our proposed algorithm lies in that each station needs to select an appropriate contention window size so as to fairly share the channel occupancy(More)
A key issue impacting the performance of multihop wireless networks is wireless interference among neighboring nodes. In this paper, we study the impact of interference on mean delay and available bandwidth residing at wireless nodes, and present a novel interference aware metric, named Network Allocation Vector Count (NAVC). The design of NAVC as a metric(More)