Low complexity floor localization algorithm for mobile phone

2014 ◽  
Author(s):  
Kornkanok Khaoampai ◽  
Kulit Na Nakorn ◽  
Kultida Rojviboonchai
Keyword(s):  
Mobile Phone ◽  
Low Complexity ◽  
Localization Algorithm

The Research on the Tracking and Positioning Platform Based on the Android Smartphone

2014 ◽  
Vol 631-632 ◽  
pp. 618-622
Author(s):  
Mei Hui Xu ◽  
Ya Qi Wang ◽  
Long Xi Xu
Keyword(s):  
Mobile Phone ◽  
Market Share ◽  
Location Information ◽  
Localization Algorithm ◽  
Important Data ◽  
Security Issues ◽  
Phone Number ◽  
Mobile Localization ◽  
First Time ◽  
The Web

The 3G era, the smartphone market share is higher and higher. The mobile phone based on the Android platform accounts for more than half of the market share. Once the user lost the phone, it is not only hard to find, but also to face important data leak and privacy security issues. So, the demand to provide mobile phone found function appears increasingly urgent. If the mobile phone is lost, this platform can get information on replaced mobile phone SIM card to boot for the first time, and upload the new mobile phone number and current phone location information to the server. It provides users with inquiry function on the web in order to achieve the purpose of tracking the lost mobile phone. The application prospect of this study is widespread, not only limited to track the missing phone, also involves other position service in the life need. The relevant mobile localization algorithm is detailed in this paper.

DESIGN AND IMPLEMENTATION OF WIRELESS SENSOR NETWORK FOR ROBOT NAVIGATION

2007 ◽  
Vol 04 (01) ◽  
pp. 77-89 ◽  
Author(s):  
WANMING CHEN ◽  
HUAWEI LIANG ◽  
TAO MEI ◽  
ZHUHONG YOU ◽  
SHIFU MIAO ◽  
...  
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Robot Navigation ◽  
Information Source ◽  
Low Complexity ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Localization Algorithm ◽  
Distributed Information ◽  
Communication Method

Global Positioning System (GPS) is often used as a main information source for robot localization and navigation. However, it cannot be used in room or in field complex environment because of the bad signal there. To solve this problem, the authors designed and implemented a specific wireless sensor network (WSN) to provide information about the environment and indicate path for robot navigation. A two-stage auto-adaptive route selecting mechanism of the WSN was proposed to facilitate data relaying in localization and the robot's navigation. A low complexity localization algorithm was used to localize both the nodes and the robot. An indirect communication method was designed to make the communication between the WSN and the robot possible. In addition, a robot navigation method was proposed based on the wireless sensor network. In this method, the robot did not need to obtain the environment information; the wireless sensor nodes collected and fused the distributed information and then indicate a path for the robot. Experiments showed that the wireless sensor network can result in obstacle avoidance navigation, and can implement the online navigation.

A Range Free Acoustic Localization Algorithm in Wireless Sensor Networks

2014 ◽  
Vol 538 ◽  
pp. 502-507
Author(s):  
Jiang Shan Ai ◽  
Xiao Hong Chen
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Background Noise ◽  
Low Complexity ◽  
Wireless Sensor ◽  
Perpendicular Bisector ◽  
Localization Algorithm ◽  
Acoustic Localization ◽  
Localization Precision ◽  
Range Free

For accomplishing acoustic location in wireless sensor networks (WSNs), a range free acoustic localization algorithm based on perpendicular bisector partition is proposed, taking into account of reducing computation complexity and reduce the interference of the background noise. Adopting a range free perpendicular bisector partition, the proposed method can find the sub-region of the source, and the time complexity is much lower than that of existing methods. According to extensive analysis on noise, the concept of noise sensitive region is derived. Experimental results show that the proposed method has a high localization precision and low complexity.

scholarly journals Breaking Users’ Mobile Phone Number Based on Geographical Location: A Case Study with YY

Information ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 200
Author(s):  
Hongzhou Yue ◽  
Huaping Guo ◽  
Xingpo Ma
Keyword(s):  
Mobile Phone ◽  
Geographical Location ◽  
Localization Algorithm ◽  
User Privacy ◽  
Security Vulnerabilities ◽  
Network Attack ◽  
Software Products ◽  
Phone Number ◽  
Privacy Leakage ◽  
Brute Force Method

Geographical location and mobile phone numbers are important parts of user privacy and lots of studies have been working on the privacy leakage problems of these two aspects. However, no researchers have ever studied the security problems that can be caused by the interaction between them. We show a new form of network attack in this paper by making full use of the relationship between them; namely, we try to break a user’s mobile phone number with the aid of a user’s geographical location that has been broken. We study the phenomenon of exposing a user’s geographical location and parts of their phone number that exist in a series of popular software products, and the possibility of the user’s mobile phone number to be broken is discussed. We choose one of the software (the largest entertainment webcast platform in China—YY) as the research object. First, taking advantage of a series of security vulnerabilities that exist in YY, a user’s accurate geographical location is broken by the trilateration localization algorithm. Then, their mobile phone number attribution can be inferred according to their geographical location. Next, a mobile phone number test set is constructed according to the mobile phone segment allocation made by the three carriers (telecommunication operators) and the exposed parts of the user’s phone number. Finally, a brute-force method is used to break the user’s mobile phone number. The great effect of a user’s geographical location on breaking a mobile phone number is proved by experiments, and security precaution suggestions are given at the end of the paper.

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