智能反射面辅助短包通信中时效与能效间的折衷

张洋译; 管新荣; 王权; 邓诚; 朱泽源; 蔡跃明

doi:10.11999/JEIT240666

智能反射面辅助短包通信中时效与能效间的折衷

doi: 10.11999/JEIT240666

1.
陆军工程大学通信工程学院南京 210007
2.
中国人民解放军 32319部队乌鲁木齐 830002
3.
中国人民解放军 32579部队桂林 541000

基金项目: 国家自然科学基金(62171461, 62171464)

详细信息

作者简介:
张洋译：男，博士生，研究方向为智能超表面和短包通信

管新荣：男，博士，副教授，研究方向为智能超表面和短包通信

王权：男，硕士，助理工程师，研究方向为移动通信、协同通信等

邓诚：男，硕士，研究方向为移动通信、协同通信等

朱泽源：男，博士生，研究方向为认知无线电和短包通信

蔡跃明：男，博士，教授，研究方向为移动通信、协同通信等

通讯作者:
管新荣　guanxr@aliyun.com

中图分类号: TN926
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- HTML全文浏览量: 35
- PDF下载量: 48
- 被引次数: 0
出版历程
- 收稿日期: 2024-07-29
- 修回日期: 2024-11-28
- 网络出版日期: 2024-11-30

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

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)

摘要

摘要: 在监控物联网中，一些感知设备需要在能耗受限条件下及时地将采集信息回传给接入节点(AP)，信息年龄(AoI)和能量效率(EE)对系统都很重要。该文研究了多设备监控物联网中时效与能效之间的折衷问题，其中感知设备在智能反射面(IRS)辅助下通过短包传输监控信息给AP。为了避免多个感知设备占用同一资源块导致包的碰撞，该文提出了一个接入控制协议，并推导了平均AoI和EE的闭式表达式。在此基础上，引入了平均AoI和EE之比这个指标，通过优化传输功率来最小化平均AoI和EE之比，以折衷时效性能与能效性能。仿真结果验证了该文理论分析的正确性，并且表明所提协议能够实现更好的时效和能效性能。此外，所提算法能够有效找出最优的时效-能效折衷点。
- 信息年龄 /
- 能量效率 /
- 短包通信 /
- 智能反射面
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)

HTML全文

图 1 IRS辅助短包通信系统

下载: 全尺寸图片幻灯片

图 2 AoI更新过程

下载: 全尺寸图片幻灯片

图 3 平均AoI与IRS反射单元数量的关系

下载: 全尺寸图片幻灯片

图 4 平均AoI与信号传输功率的关系

下载: 全尺寸图片幻灯片

图 5 EE与信号传输功率的关系

下载: 全尺寸图片幻灯片

图 6 平均AoI与EE之比随信号传输功率的变化关系

下载: 全尺寸图片幻灯片

1 信号传输功率优化算法

初始化：$ {P_{{\text{low}}}} = {\sigma ^2}u/{\left( {{\varPsi } - \sqrt {\varTheta } } \right)^2} $, $ {P_{{\mathrm{up}}}} = {\sigma ^2}u/{\left( {\varPsi - 3\sqrt \varTheta } \right)^2} $
Repeat
If $ {\left. {{\text{d}}\lambda /{\text{d}}P} \right\|_{P = \left( {{P_{{\text{low}}}} + {P_{{\text{up}}}}} \right)/2}} < 0 $
$ {P_{{\text{low}}}} = \left( {{P_{{\text{low}}}} + {P_{{\text{up}}}}} \right)/2 $
Else
$ {P_{{\text{up}}}} = \left( {{P_{{\text{low}}}} + {P_{{\text{up}}}}} \right)/2 $
Until $ {P_{{\text{up}}}} - {P_{{\text{low}}}} \le \delta $
输出：最优信号传输功率为$ {P^ * } = \left( {{P_{{\text{low}}}} + {P_{{\text{up}}}}} \right)/2 $

下载: 导出CSV

参考文献(22)

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