WLAN location service with TXOP

Liu, RP; Hedley, M; Yang, X

WLAN location service with TXOP

Liu, RP

Hedley, M Yang, X

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Computers, 2013, 62 (3), pp. 589 - 598
Issue Date:: 2013-02-12

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Field	Value	Language
dc.contributor.author	Liu, RP https://orcid.org/0000-0001-7001-6305	en_US
dc.contributor.author	Hedley, M	en_US
dc.contributor.author	Yang, X	en_US
dc.date.issued	2013-02-12	en_US
dc.identifier.citation	IEEE Transactions on Computers, 2013, 62 (3), pp. 589 - 598	en_US
dc.identifier.issn	0018-9340	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117521
dc.description.abstract	The provision of location-based services with high positional accuracy requires the use of Time of Arrival (TOA)-based techniques. However, existing TOA-based WLAN location service schemes are inefficient due to the individual query and response ranging method employed. We present a highly efficient WLAN location service architecture which includes a modification to the Transmit Opportunity (TXOP) technique in the IEEE 802.11e standard. Our Location Service with TXOP (LSOP) scheme achieves high efficiency by minimizing the number of TOA transmissions and eliminating the contention overhead for TOA messages. The adaptation of TXOP technique also improves location accuracy by protecting TOA messages from collision and by grouping the TOA messages into one compact burst. Our analysis shows that the LSOP scheme achieves the highest location update rate compared to previous schemes. Our simulation results show that the LSOP scheme has minimum impact on data traffic and achieves higher accuracy than the previous schemes. Experimental results demonstrate the degradation in localization performance caused by packet collisions. These results validate that our LSOP scheme, which implements contention-free broadcast of TOA messages with a modified TXOP, provides the best combination of high location update rate, low network load, and high location accuracy compared to other schemes. © 1968-2012 IEEE.	en_US
dc.relation.ispartof	IEEE Transactions on Computers	en_US
dc.relation.isbasedon	10.1109/TC.2011.253	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Computer Hardware & Architecture	en_US
dc.title	WLAN location service with TXOP	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	62	en_US
utslib.for	0803 Computer Software	en_US
utslib.for	0805 Distributed Computing	en_US
utslib.for	1006 Computer Hardware	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	closed_access	*
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	62	en_US

Abstract:

The provision of location-based services with high positional accuracy requires the use of Time of Arrival (TOA)-based techniques. However, existing TOA-based WLAN location service schemes are inefficient due to the individual query and response ranging method employed. We present a highly efficient WLAN location service architecture which includes a modification to the Transmit Opportunity (TXOP) technique in the IEEE 802.11e standard. Our Location Service with TXOP (LSOP) scheme achieves high efficiency by minimizing the number of TOA transmissions and eliminating the contention overhead for TOA messages. The adaptation of TXOP technique also improves location accuracy by protecting TOA messages from collision and by grouping the TOA messages into one compact burst. Our analysis shows that the LSOP scheme achieves the highest location update rate compared to previous schemes. Our simulation results show that the LSOP scheme has minimum impact on data traffic and achieves higher accuracy than the previous schemes. Experimental results demonstrate the degradation in localization performance caused by packet collisions. These results validate that our LSOP scheme, which implements contention-free broadcast of TOA messages with a modified TXOP, provides the best combination of high location update rate, low network load, and high location accuracy compared to other schemes. © 1968-2012 IEEE.

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http://hdl.handle.net/10453/117521