BLUETOOTHBLUETOOTHBASEDBASED

LOCATION SYSTEMLOCATION SYSTEM

SULAIMAN AL AWADSULAIMAN AL AWADHANI AL RUWAILIHANI AL RUWAILI

OverviewOverview IntroductionIntroduction Technologies Used in Location SystemTechnologies Used in Location System Bluetooth TechnologyBluetooth Technology Different approachesDifferent approaches

Wi-Fi trade offWi-Fi trade off Bluetooth trade offBluetooth trade off

AdvantagesAdvantages EquipmentEquipment Description of algorithmDescription of algorithm

Basic OperationBasic Operation ConclusionConclusion

IntroductionIntroduction

Proliferation of wireless Proliferation of wireless technologies, mobile computing technologies, mobile computing devices, and the Internet has devices, and the Internet has fostered a new growing interest in fostered a new growing interest in location-aware systems and serviceslocation-aware systems and services

ObjectiveObjective

To develop an indoor location system To develop an indoor location system based on Bluetooth.based on Bluetooth.

Technologies and Technologies and Related WorkRelated Work Infrared – Active Badge Infrared – Active Badge

a tag in the form of an Active Badge that emit a unique code

IEEE 802.11 (Wi-Fi) – RADAR IEEE 802.11 (Wi-Fi) – RADAR indoor(~20 m - ~50 m) , outdoor(~100 indoor(~20 m - ~50 m) , outdoor(~100

m-~5000 m)m-~5000 m)

BluetoothBluetooth

Bluetooth TechnologyBluetooth Technology

Bluetooth is a standard and Bluetooth is a standard and communications protocol primarily communications protocol primarily designed for designed for low power low power consumptionconsumption, with a , with a short rangeshort range , , based on based on low-costlow-cost in each device. in each device.

Different approaches (Different approaches (indoor indoor

locating systemlocating system)) Wi-Fi (wireless Wi-Fi (wireless EthernetEthernet ) ) BluetoothBluetooth

Wi-Fi trade offWi-Fi trade off

Expensive hardware Expensive hardware Higher power consumption Higher power consumption Wi-Fi is a replacement only for Wi-Fi is a replacement only for

local area networklocal area network access. access. Wi-Fi requires more configuration Wi-Fi requires more configuration

Bluetooth trade offBluetooth trade off

Slower connection Slower connection Limited range from the base stationLimited range from the base station Lower security than Wi-Fi Lower security than Wi-Fi

Frequency RangesFrequency Ranges

They use the same They use the same frequency rangefrequency range, , but employ different modulation but employ different modulation techniquestechniques Wi-Fi use higher power which resulting Wi-Fi use higher power which resulting

in a stronger connection.in a stronger connection. Bluetooth use lower power resulting in Bluetooth use lower power resulting in

lower connection ( still lower connection ( still goodgood for indoor for indoor applications )applications )

AdvantagesAdvantages Non-line-of-sight nature.Non-line-of-sight nature. Bluetooth exists in many products, such as Bluetooth exists in many products, such as

telephones, printers, modems and headsets telephones, printers, modems and headsets Can be read in less than 100 milliseconds. Can be read in less than 100 milliseconds. Bluetooth simplifies the discovery and Bluetooth simplifies the discovery and

setup of services between devicessetup of services between devices Bluetooth allows multiple devices to Bluetooth allows multiple devices to

communicate with a computer over a communicate with a computer over a single adaptersingle adapter

Cost-effectiveness Cost-effectiveness

EquipmentEquipment

Reader (Server)Reader (Server) Range up to ~100 metersRange up to ~100 meters Can communicate with up to 7 active devices and Can communicate with up to 7 active devices and

up to 255 inactive devicesup to 255 inactive devices Support Support Received Signal Strength Indicator

(RSSI). (function of distance) (function of distance) Operate at the frequency of 2.4 GHz to 2.4835 Operate at the frequency of 2.4 GHz to 2.4835

GHz range GHz range Administrator (Client)Administrator (Client)

Receive signal, which consists of a unique 7-Receive signal, which consists of a unique 7-character ID, every character ID, every XX seconds for identification seconds for identification

Algorithm computation

Description of algorithmDescription of algorithm

Servers ( Readers )Servers ( Readers ) Client Client

(Administrator)(Administrator) Tag (Bluetooth kit)Tag (Bluetooth kit)

SERVER

SERVER

SERVER

CLIENTTag

Basic OperationBasic Operation

The server emits radio signal to sense the tag The server emits radio signal to sense the tag (mobile, or any Bluetooth kit), generate a log (mobile, or any Bluetooth kit), generate a log filefile

and sort the discovered tags with:and sort the discovered tags with: AddressAddress ServicesServices Signal strength ( RSSI )Signal strength ( RSSI )

Every X seconds the server will transmit the Every X seconds the server will transmit the log file to the Admin. log file to the Admin.

Admin. Do some calculations and time Admin. Do some calculations and time comparison comparison

ConclusionConclusion

We have introduced a system that We have introduced a system that locate mobile devices in indoor locate mobile devices in indoor environmentsenvironments, the system use the RF provided by a Bluetooth network. The system is based on the signal strength received that is transmitted to a central client where the data analyzed and the location is determined.

Did you Know ?Did you Know ?

Bluetooth was named after a tenthBluetooth was named after a tenth--century king, Harald Bluetooth, King century king, Harald Bluetooth, King of Denmark and Norway of Denmark and Norway

The Bluetooth logo merges the The Bluetooth logo merges the Germanic runes analogous to the Germanic runes analogous to the modern Latin letter H and B:  (for modern Latin letter H and B:  (for HHarald arald BBluetooth) (Hagall) and luetooth) (Hagall) and (Berkanan) merged together (Berkanan) merged together

Thank youThank you

Questions ?Questions ?