Evaluation of Wireless Techniques for Short-Range ...

Evaluation of Wireless Techniques for Short-Range Communication

Master's thesis performed in Data Transmission

by Jonas So?derkvist

Reg nr: LiTH-ISY-EX-3411-2003

30th September 2003

Evaluation of Wireless Techniques for Short-Range Communication

Master's thesis performed in Data Transmission, Dept. of Electrical Engineering

at Linko?pings universitet by Jonas So?derkvist

Reg nr: LiTH-ISY-EX-3411-2003

Supervisor: Kennet Adolfsson Saab Rosemount

Examiner: Associate Professor Lasse Alfredsson Linko?pings Universitet

Linko?ping, 30th September 2003

Avdelning, Institution Division, Department

Data Transmission, Dept. of Electrical Engineering 581 83 Linko?ping

Datum Date

30th September 2003

Spr?ak Language

Svenska/Swedish ? Engelska/English

Rapporttyp Report category

Licentiatavhandling ? Examensarbete

C-uppsats D-uppsats O? vrig rapport

ISBN

--

ISRN

LITH-ISY-EX-3411-2003

Serietitel och serienummer ISSN

Title of series, numbering

--

URL fo?r elektronisk version



Titel Title

Utva?rdering av tr?adlo?sa tekniker fo?r kommunikation o?ver korta avst?and Evaluation of Wireless Techniques for Short-Range Communication

Fo?rfattare Jonas So?derkvist

Author

Sammanfattning

Abstract

On radar level gauges currently shipped by Saab Rosemount, some

adjustments of the unit's parameters has to be performed in the field.

Presently, this is a cumbersome procedure; the operator has to be very

close to the gauge and he either has to carry with him a bulky configu-

ration unit or use a basic control unit on the gauge. A wireless solution,

where a portable device and a receiver replace the control unit, would

both allow the operator to work from a distance and eliminate the need

for the bulky device.

The most conspicuous restraint for such a solution is a very low al-

lowed power dissipation. The reason for this is that some gauges do

not have a separate power supply, but are fed directly off the commu-

nication bus. A viable solution should also be commercially available

and robust enough to operate in an industrial environment.

To meet these requirements both a theoretical and a practical assess-

ment was conducted, where the two techniques for wireless communi-

cation, IrDA, and Bluetooth, was given special consideration. As for

the portable device, the market for hand-held computers was investi-

gated and ultimately a PDA from Palm was selected for this project.

Together with this PDA, a prototype for each of the two wireless tech-

niques was tested to ascertain their performance with respect to power

dissipation, communication range, and communication robustness.

This investigation revealed that Bluetooth could be used over a much

greater distance than IrDA and it did also provide a more robust so-

lution overall. IrDA is nonetheless also a competent technique, and

has its primary advantage in terms of much lower power dissipation

compared to Bluetooth.

Nyckelord

Keywords IrDA, infrared, Bluetooth, wireless, short-range, communication, PDA

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