Abstract
Machine-type communication requires rethinking of the structure of short packets due to the coding limitations and the significant role of the control information. In ultra-reliable low-latency communication (URLLC), it is crucial to optimally use the limited degrees of freedom (DoFs) to send data and control information. We consider a URLLC model for short packet transmission with acknow 1-edgement (ACK). We compare the detection/decoding performance of two short packet structures: (1) time-multiplexed detection sequence and data; and (2) structure in which both packet detection and data decoding use all DoFs. Specifically, as an instance of the second structure we use superimposed sequences for detection and data. We derive the probabilities of false alarm and misdetection for an AWGN channel and numerically minimize the packet error probability (PER), showing that for delay-constrained data and ACK exchange, there is a tradeoff between the resources spent for detection and decoding. We show that the optimal PER for the superimposed structure is achieved for higher detection overhead. For this reason, the PER is also higher than in the preamble case. However, the superimposed structure is advantageous due to its flexibility to achieve optimal operation without the need to use multiple codebooks.
Original language | English |
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Title of host publication | 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) |
Number of pages | 5 |
Publisher | IEEE |
Publication date | 13 Sept 2018 |
Pages | 6608-6612 |
Article number | 8461650 |
ISBN (Print) | 978-1-5386-4659-5 |
ISBN (Electronic) | 978-1-5386-4658-8 |
DOIs | |
Publication status | Published - 13 Sept 2018 |
Event | 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) - Calgary, Canada Duration: 15 Apr 2018 → 20 Apr 2018 https://2018.ieeeicassp.org/ |
Conference
Conference | 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) |
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Country/Territory | Canada |
City | Calgary |
Period | 15/04/2018 → 20/04/2018 |
Internet address |
Series | Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing |
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ISSN | 1520-6149 |
Keywords
- Decoding
- Detection
- Short packets
- URLLC