An efficient channel coding and short preamble design for mission critical machine-type communication over wireless networks / Najib Ahmed Mohammed Ahmed
Machine-type Communication (MTC) plays an imperative role in wireless networks and becomes the dominant communication paradigm for various real-time applications including industrial automation, public safety, healthcare, utilities, transportation, smart cities, and numerous other applications. H...
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| フォーマット: | 学位論文 |
| 出版事項: |
2022
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| 主題: | |
| オンライン･アクセス: | http://studentsrepo.um.edu.my/14391/1/Najib_Ahmed.pdf http://studentsrepo.um.edu.my/14391/2/Najib_Ahmed.pdf http://studentsrepo.um.edu.my/14391/ |
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| 要約: | Machine-type Communication (MTC) plays an imperative role in wireless networks
and becomes the dominant communication paradigm for various real-time applications
including industrial automation, public safety, healthcare, utilities, transportation, smart
cities, and numerous other applications. Hence, wireless system is expected to a larger
extent, will be used in the context of MTC. Mission-critical MTC (mcMTC), also referred
to as Ultra-reliable Low-latency Communication (URLLC), has become a research hotspot.
It is primarily characterized by communication that provides ultra-high reliability and very
low latency to concurrently transmit short commands to a massive number of connected
devices. However, mcMTC poses significant transmission challenges over wireless
channels, as it is prone to channel noise, interference, distortion, and bit synchronization
errors. In addition, supporting small data communications for concurrent connection for
a massive number of MTC devices and providing insights in trade-offs between latency
and reliability have been neglected. The mcMTC has a significant technical impact on the
design of all layers of the communication protocol stack. While the reduction of PHY layer
overhead and improvement in channel coding techniques are pivotal in reducing latency
and improving reliability, the current wireless standards dedicated to support mcMTC
rely heavily on adopting the bottom layers of general-purpose wireless standards and
customizing only the upper layers. As such, the PHY layer design requires further analysis
to realize the stringent requirements of mcMTC. In this study, an innovative architecture is proposed for mcMTC applications through PHY layer named Mission Critical WiFi
(MC-WiFi) targeted at reducing the end-to-end (E2E) latency by minimizing the packet
transmission time and improving the reliability by proposing a one preamble symbol Packet
Detection and Channel Synchronization (PDCS) algorithm and implementing of polar
codes in the wireless channel. Mathematical results show that the proposed architecture
allows a substantial reduction in packet transmission time, down to 5 μs and guaranties
error probability at 1 |
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