Request-Based Polling Access: Investigation of Novel Wireless LAN MAC Scheme for Low-Latency E-Health Applications
For hospital e-health systems, a novel medium access control (MAC) scheme that achieves delay-sensitive healthcare traffic (DSHT) delivery in the uplink direction of wireless local area networks (WLANs) is proposed and investigated. By introducing a slotted request uploading period and informing hub...
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Published in | IEEE communications letters Vol. 23; no. 5; pp. 896 - 899 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | For hospital e-health systems, a novel medium access control (MAC) scheme that achieves delay-sensitive healthcare traffic (DSHT) delivery in the uplink direction of wireless local area networks (WLANs) is proposed and investigated. By introducing a slotted request uploading period and informing hubs to upload their transmission requests orderly during the period, overhead cost associated with frequent transmitter/receiver transitions can be reduced and polling empty hubs can be eliminated. Consequently, the proposed scheme results in in-time polling of hubs, thereby optimizing packet queuing delay. Moreover, due to centralized coordination, the proposed scheme avoids contention and back-off. Such an MAC scheme is critical to the Internet of Things (IoT)-based delay-sensitive healthcare applications (DSHAs), such as unmanned patient tending and tele-diagnose/surgery in future e-health systems. Our simulation results show that under a delay constraint of <inline-formula> <tex-math notation="LaTeX">200~\mu \text{s} </tex-math></inline-formula>, the proposed scheme outperforms both the conventional point coordination function (PCF) and distributed coordination function (DCF) schemes in terms of DSHT throughput and has a good DSHT delivery stability performance. |
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ISSN: | 1089-7798 1558-2558 |
DOI: | 10.1109/LCOMM.2019.2903801 |