Paper Info
Title
CA-CWA: Channel-Aware Contention Window Adaption in IEEE 802.11ah for Soft Real-Time Industrial Applications.
Abstract
In 2016, the IEEE task group ah (TGah) released a new standard called IEEE 802.11ah, and industrial Internet of Things (IoT) is one of its typical use cases. The restricted access window (RAW) is one of the core MAC mechanisms of IEEE 802.11ah, which aims to address the collision problem in the dense wireless networks. However, in each RAW period, stations still need to contend for the channel by Distributed Coordination Function and Enhanced Distributed Channel Access (DCF/EDCA), which cannot meet the real-time requirements of most industrial applications. In this paper, we propose a channel-aware contention window adaption (CA-CWA) algorithm. The algorithm dynamically adapts the contention window based on the channel status with an external interference discrimination ability, and improves the real-time performance of the IEEE 802.11ah. To validate the real-time performance of CA-CWA, we compared CA-CWA with two other backoff algorithms with an NS-3 simulator. The results illustrate that CA-CWA has better performance than the other two algorithms in terms of packet loss rate and average delay. Compared with the other two algorithms, CA-CWA is able to support industrial applications with higher deadline constraints under the same channel conditions in IEEE 802.11ah.
Year
DOI
Venue
2019
10.3390/s19133002
SENSORS
Keywords
Field
DocType
wireless local area network,IEEE 802,11ah,industrial IoT,medium access control,timeliness
Wireless network,Use case,IEEE 802.11ah,Computer network,Communication channel,Electronic engineering,Distributed coordination function,Interference (wave propagation),Wi-Fi,Engineering,Collision problem
Journal
Volume
Issue
ISSN
19
13
1424-8220
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
yujun cheng142.45
Huachun Zhou237054.39
Dong Yang321120.38