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Age of error information and throughput for truncated and layer‐coded HARQ‐based satellite‐IoT systems.

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Title: Age of error information and throughput for truncated and layer‐coded HARQ‐based satellite‐IoT systems.
Authors: Zhao, Yuhua1 (AUTHOR), Jia, Xiangdong1,2 (AUTHOR) jiaxd@nwnu.edu.cn, Xie, Mangang1 (AUTHOR), Hao, Zhenchao1 (AUTHOR)
Source: International Journal of Communication Systems. 11/25/2023, Vol. 36 Issue 17, p1-29. 29p.
Subjects: Information society, Adaptive modulation, Signal-to-noise ratio, Markov processes, Modulation coding, Internet of things
Abstract: Summary: The work focuses on the simultaneous improvement on the throughput and information freshness of the promising satellite‐based Internet of Things (S‐IoT). To this end, we first propose a method based on the adaptive modulation coding (AMC) and truncated layer‐coded hybrid automatic repeat request (L‐HARQ) strategies by especially considering the difference in the channel state information (CSI) between the transmitter and receiver. On account of the large signal delay of the S‐IoT systems, this paper establishes the channel model based on the correlation of the signal‐to‐noise ratio (SNR) under the outdated channel and the ideal channel. Secondly, considering the fact that the improved backtrack decoding is used in the L‐HARQ, the classical definition of age of information (AoI) is insufficient to quantify the status update freshness, we propose the age of error information (AoEI), which is defined as the elapsed time since the generation of the lastly successfully backtrack‐decoded status update. Thirdly, we characterize the statistical descriptions of the maximum wait time of the successfully recovered status updates and the interdeparture time between the two consecutive status update packets that are lastly successfully received. Then, the closed‐form expression of average AoEI is derived under the assumption of independent and identically distributed fading channels. Finally, the Markov decision process (MDP) framework is used to optimize the packet parameters in each round of L‐HARQ process under the general fading scenario. Thereby, the optimized transmission scheme that minimizes AoI with throughput constraint is solved. The simulations investigate the effect of system parameters on the average AoEI. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Communication Systems is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Age of error information and throughput for truncated and layer‐coded HARQ‐based satellite‐IoT systems.
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  Data: <searchLink fieldCode="AR" term="%22Zhao%2C+Yuhua%22">Zhao, Yuhua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Xiangdong%22">Jia, Xiangdong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jiaxd@nwnu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xie%2C+Mangang%22">Xie, Mangang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hao%2C+Zhenchao%22">Hao, Zhenchao</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Communication+Systems%22">International Journal of Communication Systems</searchLink>. 11/25/2023, Vol. 36 Issue 17, p1-29. 29p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Information+society%22">Information society</searchLink><br /><searchLink fieldCode="DE" term="%22Adaptive+modulation%22">Adaptive modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Signal-to-noise+ratio%22">Signal-to-noise ratio</searchLink><br /><searchLink fieldCode="DE" term="%22Markov+processes%22">Markov processes</searchLink><br /><searchLink fieldCode="DE" term="%22Modulation+coding%22">Modulation coding</searchLink><br /><searchLink fieldCode="DE" term="%22Internet+of+things%22">Internet of things</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Summary: The work focuses on the simultaneous improvement on the throughput and information freshness of the promising satellite‐based Internet of Things (S‐IoT). To this end, we first propose a method based on the adaptive modulation coding (AMC) and truncated layer‐coded hybrid automatic repeat request (L‐HARQ) strategies by especially considering the difference in the channel state information (CSI) between the transmitter and receiver. On account of the large signal delay of the S‐IoT systems, this paper establishes the channel model based on the correlation of the signal‐to‐noise ratio (SNR) under the outdated channel and the ideal channel. Secondly, considering the fact that the improved backtrack decoding is used in the L‐HARQ, the classical definition of age of information (AoI) is insufficient to quantify the status update freshness, we propose the age of error information (AoEI), which is defined as the elapsed time since the generation of the lastly successfully backtrack‐decoded status update. Thirdly, we characterize the statistical descriptions of the maximum wait time of the successfully recovered status updates and the interdeparture time between the two consecutive status update packets that are lastly successfully received. Then, the closed‐form expression of average AoEI is derived under the assumption of independent and identically distributed fading channels. Finally, the Markov decision process (MDP) framework is used to optimize the packet parameters in each round of L‐HARQ process under the general fading scenario. Thereby, the optimized transmission scheme that minimizes AoI with throughput constraint is solved. The simulations investigate the effect of system parameters on the average AoEI. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Communication Systems is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1002/dac.5598
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      – Code: eng
        Text: English
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      – SubjectFull: Adaptive modulation
        Type: general
      – SubjectFull: Signal-to-noise ratio
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      – SubjectFull: Markov processes
        Type: general
      – SubjectFull: Modulation coding
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      – SubjectFull: Internet of things
        Type: general
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      – TitleFull: Age of error information and throughput for truncated and layer‐coded HARQ‐based satellite‐IoT systems.
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            NameFull: Zhao, Yuhua
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            NameFull: Jia, Xiangdong
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            NameFull: Xie, Mangang
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            – D: 25
              M: 11
              Text: 11/25/2023
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              Y: 2023
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