Request-Based Polling Access: Investigation of Novel Wireless LAN MAC Scheme for Low-Latency E-Health Applications

Published on May 1, 2019in IEEE Communications Letters3.46
· DOI :10.1109/LCOMM.2019.2903801
Yunxin Lv5
Estimated H-index: 5
(University of Electronic Science and Technology of China),
Maluge Pubuduni Imali Dias4
Estimated H-index: 4
(University of Melbourne)
+ 4 AuthorsKun Qiu15
Estimated H-index: 15
(University of Electronic Science and Technology of China)
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 200~\mu \text{s} , 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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#1Ye Feng (University of Melbourne)H-Index: 1
#2Chamil Jayasundara (University of Melbourne)H-Index: 6
Last.Elaine Wong (University of Melbourne)H-Index: 21
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#1Glen Kramer (UC Davis: University of California, Davis)H-Index: 10
#2Biswanath Mukherjee (UC Davis: University of California, Davis)H-Index: 77
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