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tems (Weghorn, 2004), which we developed in the
recent years, like traffic and weather channels.
5 CONCLUSIONS
In the work reported here, a technical programming
concept was developed. This describes how informa-
tion access from handheld devices, which usually
use for this a wireless phone network connection to
the Internet, can be replaced by Bluetooth communi-
cation.
Doubtlessly, the best solution would be, if an
automatic rerouting is implemented in the opera-
tional software layers of the wireless device instead
of the application software, since BT provides a
dedicate service for using the Internet connection of
other hosts. Unfortunately – although this would be
technically achievable – other samples of missing
possible features, e.g., making direct calls between
phone terminals via BT that is also within the stan-
dard since years (Miller, 2001), show us that this is
not very likely to happen soon. Obvious economic
interests of wireless telephony network operators
prevent this advance for the end customer, and since
these operators are sponsoring to a large extend the
purchase of wireless devices, there exist good and
valid reasons for this strategy.
Fortunately, if an information tool shall be opti-
mized in terms of cost efficiency by using BT
communication, a direct programming of the rerout-
ing is possible, and works like the samples of the
chat client and the railway departure information
system show. Technical restrictions in the imple-
mentation of BT in true-world wireless devices also
prevent an optimal application of all potential bene-
fits of BT data links. Especially the train information
system demonstrates that already at the current state
of technology clear advantages arise for the end
user, because other systemic drawbacks like the
well-defined but non-functional location sensing
(Weghorn, 2005) can be replaced by BT sensing to a
helpful extend.
As first advance, information access costs can be
reduced, and secondly the query tool on the wireless
terminal can be used everywhere seamlessly, so
there is no need for changing between the wireless
terminal and a desktop computer depending on the
location, where the user wants to run the information
retrieval. As seen from the above photographs of
true-world devices, this all was experimentally veri-
fied with end devices from different manufacturers.
Concluding, it should be noted that the current im-
plementation of the pseudo serial communication via
BT does not easily allow a fast data stream, but in
the end this fits well to the before developed custom-
ized information system that transmits only few
relevant contents through the wireless link to the
mobile terminal (Weghorn, 2004).
REFERENCES
Bell, D., and Parr, M., 2002. JAVA for Students, Prentice
Hall. Dorchester, 3rd edition.
Weghorn, H., 2004, Personalized Information Retrieval
System for Improving the Use of Data Services
through Digital Wireless Phone Networks, IADIS In-
ternational Journal on WWW/Internet, ed. P. Isaías,
Volume II, No. 2, 43-56
Weghorn, H., 2005, Multi-Sourcing Web Services for an
Improved Access to Web Contents, in WWW/Internet
2005, IADIS Proceedings, Vol. II, 226-231, Lisbon
Hopkins, B., 2004. Getting Started w. Java and Bluetooth.
http://today.java.net/pub/a/today/2004/07/27/bluetooth
.html, last access Oct. ‘05.
Klingsmann, A. N., 2004. J2ME Bluetooth Programming,
Master’s thesis, Department of Informatics, University
of Bergen. July 2004.
Knudsen, J., and Li, S., 2005. Beginning J2ME: From
Novice to Professional. Apress, Berkeley.
Kumar, C., Kline, P., and Thompson, T., 2004, Bluetooth
Application Programming with JAVA APIs, Morgan
Kaufmann. San Francisco, 1
st
edition.
Mahmoud, Q. H., 2003. Wireless Application Program-
ming with J2ME and Bluetooth.
http://developers.sun.com/techtopics/mobility/midp/art
icles/bluetooth1/, last access Nov. ‘05.
Miller, B., 2001. Future Applications for Bluetooth Wire-
less Technology, in Bluetooth Revealed: The Insider's
Guide to an Open Specification for Global Wireless
Communications, Prentice Hall. 2
nd
Edition.
Riezenman, M. J., 2002. The ABCs of IEEE 802.11. IEEE
Spectrum Online, September 2002.
http://www.spectrum.ieee.org/WEBONLY/resource/se
p02/802ABCs.html, last access April ‘05.
Schiller, J., and Voisard, A. (eds), 2004, Location-Based
Services. Morgan Kaufmann Publishers, San Fran-
cisco, USA.
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