Localization on IEEE 802.11 Networks
نویسنده
چکیده
In this paper we introduce an innovative technique for localization purpose in IEEE 802.11 networks, [1]. Our location algorithm is based on the distance estimation performed by three Base Stations (BSs), employing the triangulation process to calculate the mobile user position. This method results innovative and efficient both for the IEEE802.11 PCF and DCF phases to track the user position at a constant rate according to the user speed. A complete simulation model has been developed to assess the maximum number of users traceable. Then, in the last part of the paper, we investigated the use of an algorithm for the time of arrival (ToA) estimation based on the OFDM modulation, employed in IEEE 802.11a and 802.11g. We estimated the attenuation and the phase rotation at the receiver side, for each sub-carrier, [2]. Using a Kalman filter, we also evaluated the time of arrival and the distance between two mobile nodes.
منابع مشابه
A new SDN-based framework for wireless local area networks
Nowadays wireless networks are becoming important in personal and public communication andgrowing very rapidly. Similarly, Software Dened Network (SDN) is an emerging approach to over-come challenges of traditional networks. In this paper, a new SDN-based framework is proposedto ne-grained control of 802.11 Wireless LANs. This work describes the benets of programmableAcc...
متن کاملA Hidden Node Aware Network Allocation Vector Management System for Multi-hop Wireless Ad hoc Networks
Many performance evaluations for IEEE 802.11distributed coordination function (DCF) have been previouslyreported in the literature. Some of them have clearly indicatedthat 802.11 MAC protocol has poor performance in multi-hopwireless ad hoc networks due to exposed and hidden nodeproblems. Although RTS/CTS transmission scheme mitigatesthese phenomena, it has not been successful in thoroughlyomit...
متن کاملAn Improved Approach for RSSI-Based only Calibration-Free Real-Time Indoor Localization on IEEE 802.11 and 802.15.4 Wireless Networks
Assuming a reliable and responsive spatial contextualization service is a must-have in IEEE 802.11 and 802.15.4 wireless networks, a suitable approach consists of the implementation of localization capabilities, as an additional application layer to the communication protocol stack. Considering the applicative scenario where satellite-based positioning applications are denied, such as indoor en...
متن کاملIEEE 802.11 over multi-hop wireless networks: problems and new perspectives
The distributed coordination function (DCF) mode of the IEEE 802.11 MAC standard, though proposed for medium access in wireless local area networks, is seen as the de-facto medium access standard in multi-hop wireless networks. In this paper we contend that the unique characteristics that differentiate multi-hop wireless ad-hoc networks from local area wireless networks render the IEEE 802.11 M...
متن کاملEfficient Cross Layer Designs for IEEE 802.11 Wireless Networks
Title of dissertation: EFFICIENT CROSS LAYER DESIGNS FOR IEEE 802.11 WIRELESS NETWORKS Tamer Nadeem, Doctor of Philosophy, 2006 Dissertation directed by: Professor Ashok Agrawala Department of Computer Science Various properties of wireless networks, such as mobility, frequent disconnections and varying channel conditions, have made it a challenging task to design networking protocols for wirel...
متن کاملAn Overview of Wireless Networks and . Security Issues For WiFi Networks
W . ireless local area networks (WLAN s) provide wireless connectivity between PCs, laptops and other equipment in corporate, public and home environments. Today, tens of millions of users rely on shortrange wireless connectivity between computers or automation equipment using WLAN modem gear that complies with well-known Figure 1. Evolution ofWLAN standards. standards such as IEEE 802.11, 802....
متن کامل