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Introduction To Indoor Positioning System
Transcript of Introduction To Indoor Positioning System
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.
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 Coverage Area
Used by a lot of mobile devices
Ideal IPS Specifications
Under supervision of Dr.Ahmed AlMogy
Prepared by Yousef Essam ElDin Mohammed
(cc) image by jantik on Flickr
What is IPS ?
Need For IPS ?
Ideal IPS specifications
Current IPS Methods
Current IPS Technologies
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
Around 10^3 meter
Estimates position by logging when mobile
sensors come into proximity of fixed sensors
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
Used with nearly all types of infrastructure
Precision is limited by the range of sensors
Targets can be positioned only when in proximity
Estimates position from angled measurements
to fixed sensors with known locations
High Precision and Large Coverage
Lower precision compared to Lateration
Estimates positions by advancing previous estimates by known speed, elapsed time and direction
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
Encodes patterns in radio map
based on fingerprints.
The radio map contains a mapping
for each encoded pattern to position
Recognize pattern then map to position
Support tracking of non-tagged
people or items
The pattern have to be recorded / encoded for the method to work.
Indoor Localization Using Bluetooth
Low power consumption
Practical Indoor Localization using Bluetooth
MS January 2012
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.
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
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
NFC Based IPS
Near field communication is a wireless technology based on RFID
It allows transmit low amounts of data
over short distances
Department of Information Technologies, ISIK University, Istanbul, Turkey
Inertial and sensor-based localization
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
Requires a very high level of sensor accuracy.
Barometer --> used to find Height
Accelerometer ---> to count steps
Campus --> to find the direction
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
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"
Any Question ?
Low Power Consumption