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Introduction To Indoor Positioning System

Basic description of IPS method and techniques and current IPS .
by

Yousef Essam

on 1 November 2015

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Transcript of Introduction To Indoor Positioning System

indoor positioning system
IPS
Need For IPS
What is IPS ?
A person entering a building for the first time may want to go to an office inside the building without spending much time
Searching for a product in super market
Two Friends in big mall and need to Meet each other.
IPS Applications
IPS Applications
GPS Problems
Used in outdoor positioning.
GPS is between 6 and 12 meters 95% of the time the reception of the GPS signals is bad in densely build areas
satellite signals are easily blocked by roofs, nearby buildings or even trees.
Objective of IPS
High Accuracy
High Precision
Low Cost
High Coverage Area
Usability
Used by a lot of mobile devices
Ideal IPS Specifications
IPS Signals
Radio
Under supervision of Dr.Ahmed AlMogy
Prepared by Yousef Essam ElDin Mohammed
IPS revision
(cc) image by jantik on Flickr
Agenda
What is IPS ?
Need For IPS ?
GPS Problem
Ideal IPS specifications
IPS Continued
Current IPS Methods
Current IPS Technologies
IPS Work
Previous Work
My Current Work
 IPS is an acronym of the word Indoor positioning System

Used to wirelessly locate objects or people inside a building
?
Current IPS Signals
Sound
Light
Electromagnetic Waves
Around 10^3 meter
In IPS
Proximity
Estimates position by logging when mobile
sensors come into proximity of fixed sensors
Lateration
Absolute distance
Relative distance
Estimate positions from distance related measurements
to fixed sensors with known positions
High Precision and Large Coverage
Require special sensors to be installed
Position of sensor have to be established
Advantages
Disadvantages
Advantages
Disadvantages
Used with nearly all types of infrastructure
Precision is limited by the range of sensors
Targets can be positioned only when in proximity
Angulation
Estimates position from angled measurements
to fixed sensors with known locations
Advantages
Disadvantages
High Precision and Large Coverage
Lower precision compared to Lateration
Dead Reckoning
Estimates positions by advancing previous estimates by known speed, elapsed time and direction
Advantages
Disadvantages
Applied without an infrastructure in the coverage area
To compare dead reckoning positions among sensors starting position have to be known in the relevant coordinate system

position error will increase over time because small
errors in each estimate will quickly built up
Location Fingerprinting
Encodes patterns in radio map
based on fingerprints.

The radio map contains a mapping
for each encoded pattern to position
Pattern Recognition
Recognize pattern then map to position
Advantages
Disadvantages
Support tracking of non-tagged
people or items
The pattern have to be recorded / encoded for the method to work.
IPS Technologies
Indoor Localization Using Bluetooth
Available
Low power consumption
Very cheap
Reference
Practical Indoor Localization using Bluetooth
MS January 2012
WIFI Fingerprinting
Reference
A WLAN FINGERPRINTING BASED INDOOR LOCALIZATION TECHNIQUE
MS July 2012
1) Offline training phase which collects RSS samples at reference positions and builds a training database,

2) Online determination phase which determines the location of a mobile user by
comparing the measured RSS values with the training database.
Contribution
propose K Most Likely Neighbor (KMLN) algorithm to determine the K most likely
locations of a user. Among these K locations, we finally select one location using the
shortest-path-based tracking algorithm
RFID Based Fingerprinting
Reference
RFID Based IPS IEEE 2009
Develop two methods to determine the position
Method 1: Maximum Intersected Tags
Method 2 : Maximum and Second Maximum Inter-sected Tags

Method 2 have smaller error in both indoor and outdoor environment
Conclusion
NFC Based IPS
Low Cost
Near field communication is a wireless technology based on RFID
It allows transmit low amounts of data
over short distances
Small Range
Passive Tags
Reference
Department of Information Technologies, ISIK University, Istanbul, Turkey
2012
Inertial and sensor-based localization
Approximate the
position
using
sensor data
.
A modern smartphone is typically equipped with acceleration and rotation sensors(gyroscopes).
The data delivered by these sensors can be used to
calculate an overall motion vector
But
Requires a very high level of sensor accuracy.
Barometer --> used to find Height
Accelerometer ---> to count steps
Campus --> to find the direction
Reference
A Reliable and Accurate Indoor Localization Method Using Phone Inertial Sensors
Microsoft Research Asia 2012
What Next ?
!
I Think that
1- I may try to make mix between
two or more of positioning
techniques into one IPS system

suggest :
WIFI + NFC

2- Try to enhance WIFI fingerprinting technique by
using data mining , then we'll have a clusters of
fingerprints then have better accuracy.

3- I may Develop IPS based on Ultrasound "still search"
?
IPS
Any Question ?
THANK YOU
Low Power Consumption
Full transcript