Tradeoff between Age of Information and Energy Efficiency for Intelligent Reflecting Surface Assisted Short Packet Communications

ZHANG Yangyi; GUAN Xinrong; WANG Quan; DENG Cheng; ZHU Zeyuan; CAI Yueming

doi:10.11999/JEIT240666

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ZHANG Yangyi, GUAN Xinrong, WANG Quan, DENG Cheng, ZHU Zeyuan, CAI Yueming. Tradeoff between Age of Information and Energy Efficiency for Intelligent Reflecting Surface Assisted Short Packet Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240666

Citation:

ZHANG Yangyi, GUAN Xinrong, WANG Quan, DENG Cheng, ZHU Zeyuan, CAI Yueming. Tradeoff between Age of Information and Energy Efficiency for Intelligent Reflecting Surface Assisted Short Packet Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240666

Citation:

ZHANG Yangyi, GUAN Xinrong, WANG Quan, DENG Cheng, ZHU Zeyuan, CAI Yueming. Tradeoff between Age of Information and Energy Efficiency for Intelligent Reflecting Surface Assisted Short Packet Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240666

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Tradeoff between Age of Information and Energy Efficiency for Intelligent Reflecting Surface Assisted Short Packet Communications

doi: 10.11999/JEIT240666

1.
College of Communication Engineering, Army Engineering University of PLA, Nanjing 210007, China
2.
Unit 32319 of PLA, Urumqi 830002, China
3.
Unit 32579 of PLA, Guilin 541000, China

Funds: The National Natural Science Foundation of China (62171461, 62171464)

Received Date: 2024-07-29
Rev Recd Date: 2024-11-28

Available Online: 2024-11-30

Abstract

Abstract

In monitoring Internet of Things (IoT), the sensor devices need to transmit collected information back to the Access Point (AP) in a timely manner under energy-limited conditions, both the Age of Information (AoI) and Energy Efficiency (EE) are important to the systems. The AoI and EE tradeoff for multi-device monitoring systems is investigated in this paper, where the sensor devices transmit monitoring information to the AP via short packets with the assistance of an Intelligent Reflective Surface (IRS). To avoid packet collisions caused by multiple devices occupying the same resource block, an access control protocol is proposed, and the closed-form expressions for average AoI and EE are derived. On this basis, the average AoI-EE ratio is introduced and is minimized to trade off AoI and EE by optimizing the transmission power. Simulation results verify the correctness of our theoretical analysis and demonstrate that the proposed scheme can achieve better AoI and EE performances. Moreover, the proposed algorithm is able to find the optimal AoI and EE tradeoff point.
- Age of Information (AoI),
- Energy Efficiency (EE),
- Short packet communications,
- Intelligent Reflecting Surface (IRS)

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References(22)

References

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