NDLI: Energy Based Carrier Sensing in Integrated Medical Environments

Content Provider	IEEE Xplore Digital Library
Author	Bin Zhen Huan-Bang Li Hara, S. Kohno, R.
Copyright Year	2008
Description	Author affiliation: Nat. Inst. of Inf. & Commun. Technol., Yokosuka (Bin Zhen; Huan-Bang Li)
Abstract	Complementary WLAN and WPAN technologies, as well as other wireless technologies will play a fundamental role in the medical environments to support ubiquitous healthcare delivery. This paper investigates energy based carrier sensing and its impact on the coexistence of IEEE WLAN (802.11b) and WPAN (802.15.4) in the 2.4 GHz band. We derived closed-form expressions of energy based clear channel assessment (CCA) and qualified unequal sensing abilities between WLAN and WPAN in additive white Gaussian noise channel and fading channel. The asymmetric CCA is different from the traditional "hidden node" or "exposed node" issues in the homogeneous network. The WPAN is oversensitive to the 802.11b signals and the WLAN is insensitive to the 802.15.4 signals. Choosing an optimal CCA threshold requires some prior knowledge of the underlying signals. In the considered integrated medical environments, energy based CCA can effectively avoid possible packet collisions when they are close within the "heterogeneous exclusive CCA range". However, beyond this range, WPAN can still sense 802.11b signals, but WLAN lose its sense to 802.15.4 signals. This leads to WPAN traffic in a position secondary to the WLAN traffic.
Starting Page	3110
Ending Page	3114
File Size	275619
Page Count	5
File Format	PDF
ISBN	9781424420759
DOI	10.1109/ICC.2008.585
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Medical diagnostic imaging Wireless sensor networks Medical services Interference Peer to peer computing Communication system traffic control Aggregates Throughput Communications Society
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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