Journal
IEEE WIRELESS COMMUNICATIONS LETTERS
Volume 11, Issue 4, Pages 683-687Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2021.3139346
Keywords
Decoding; Error probability; Downlink; Cellular networks; Queueing analysis; Indexes; Upper bound; Age of information; AoI violation probability; decoding error probability; finite blocklength
Categories
Funding
- National Research Foundation of Korea (NRF) - Korea Government (MSIT) [NRF-2018R1A5A1060031]
- Ministry of Science and ICT (MSIT), South Korea, under the Information Technology Research Center (ITRC) Support Program [IITP2020-0-01795]
- National Research Foundation of Korea (NRF) - Korea Government (MSIP) [2020R1A2C2008878]
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With the increase in real-time systems, users have higher demands for low-latency information. This letter investigates downlink cellular networks and considers the impact of decoding error probability on the freshness of information. The optimal blocklength is found to minimize the average age of information.
With increase in real-time systems, users have come to demand information with low latency. However, as the blocklength becomes finite to reduce communication duration, the decoding error probability is newly considered. In this letter, we consider downlink cellular networks, where base stations (BSs) periodically transmit information with finite blocklength to a user. To analyze the freshness of information, we derive the average age of information (AoI) and the AoI violation probability in a closed-form using the upper bound of the average decoding error probability. Finally, we show that an optimal blocklength that minimizes the AoI exists.
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