Optimal Detection of Multiple Symbol-Slotted Random Access-Based Packet Transmissions

Random access (RA) protocols are suitable for the support of massive connectivity especially in machine-type communications, such as the Internet of Things (IoT). In this context, ALOHA protocols (both slotted and unslotted) have been re-introduced as promising enablers due to a potentially high thr...

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Bibliographic Details
Published in:IEEE wireless communications letters 2021-05, Vol.10 (5), p.981-985
Main Authors: Kisseleff, Steven, Gerstacker, Wolfgang H.
Format: Article
Language:English
Subjects:
ALOHA
Internet of Things
joint detection
Location awareness
Markov processes
Modulation
Packet transmission
Packets (communication)
Protocols
Random access
Receivers
Silicon carbide
Synchronization
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Summary:Random access (RA) protocols are suitable for the support of massive connectivity especially in machine-type communications, such as the Internet of Things (IoT). In this context, ALOHA protocols (both slotted and unslotted) have been re-introduced as promising enablers due to a potentially high throughput when enhanced via successive interference cancellation (SIC). Meanwhile, SIC has become the most popular solution for RA detection problems. In this letter, we first point out the weaknesses of SIC and then propose a novel method based on joint detection of all randomly scheduled data packets. The proposed method is based on the joint computation of a-posteriori probabilities for all data symbols and packet localizations, such that optimal detection for RA is obtained.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2021.3053345