scholarly journals Hybrid Range Based Indoor Wireless Localization using Unconstrained Nonlinear Optimization for UWB Applications

2012 ◽  
Vol 30 ◽  
pp. 562-568 ◽  
Author(s):  
R. Jayabharathy ◽  
V. Prithiviraj ◽  
R. Varadharajan
Keyword(s):  
Nonlinear Optimization ◽  
Wireless Localization ◽  
Indoor Wireless ◽  
Unconstrained Nonlinear Optimization ◽  
Uwb Applications

Improving Ultra-Wideband Positioning Security Using a Pseudo-Random Turnaround Delay Protocol

2015 ◽  
Vol 24 (10) ◽  
pp. 1550149
Author(s):  
Xue-Rong Cui ◽  
Juan Li ◽  
Hao Zhang ◽  
T. Aaron Gulliver ◽  
Chunlei Wu
Keyword(s):  
Data Exchange ◽  
Ieee 802.15.4 ◽  
Ultra Wideband ◽  
Wireless Localization ◽  
Data Link ◽  
Position Information ◽  
Location Services ◽  
Network Layers ◽  
Authentication Mechanism ◽  
Indoor Wireless

Ultra-wideband (UWB) technology is very suitable for indoor wireless localization and ranging. IEEE 802.15.4a is the first physical layer standard specifically developed for wireless ranging and positioning. While malicious devices are not typically present, snoopers, impostors and jammers can exist. The data link and network layers in standards such as Wi-Fi, IEEE 802.15.4 and 802.11 mainly provide authentication and encryption support, but security about ranging or location is rarely considered. Ranging can be achieved using just the preamble and start of frame delimiter (SFD), so in this case malicious devices can easily obtain position information. Therefore, the security of ranging or positioning protocols is very important, which differs from the case with data exchange protocols. To provide secure location services, a protocol is presented which is based on a pseudo-random turnaround delay. In this protocol, devices use different turnaround times so that it is difficult for a snooper to figure out the location of sensor devices in protected areas. At the same time, in the period of Hello frame transmission, together with the authentication mechanism of IEEE 802.15.4, an impostor cannot easily engages its deception attack.

Communications protocol for RF-based indoor wireless localization systems

2006 ◽  
Author(s):  
Tamas Kasza ◽  
Mehdi M. Shahsavari ◽  
Veton Kepuska ◽  
Maria Pinzone
Keyword(s):  
Wireless Localization ◽  
Indoor Wireless ◽  
Communications Protocol ◽  
Localization Systems
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