Coordinated Multipoint Based User Access and Power Allocation for Indoor VLC-NOMA Network

LIU Huan-lin; HU Yang; CHEN Yong; ZHANG Tong; YUAN Xi-lin; CHEN Hao-nan

doi:10.12263/DZXB.20230891

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Coordinated Multipoint Based User Access and Power Allocation for Indoor VLC-NOMA Network

PAPERS | 更新时间：2025-12-11

- Coordinated Multipoint Based User Access and Power Allocation for Indoor VLC-NOMA Network
- ACTA ELECTRONICA SINICA Vol. 52, Issue 12, Pages: 4009-4014(2024)
- 作者机构：
  
  1.重庆邮电大学通信与信息工程学院，重庆 400065
  2.重庆邮电大学自动化学院，重庆 400065
- 作者简介：
- 基金信息：
  
  Science Foundation Project of Chongqing Science and Technology Commission(CSTB2023NSCQ-MSX0734)
- DOI：10.12263/DZXB.20230891
  CLC： TN929.11
- Received：26 September 2023，
  
  Revised：2024-06-26，
  
  Published：25 December 2024
- 稿件说明：
移动端阅览
刘焕淋, 胡阳, 陈勇, 等. 室内VLC-NOMA网络的协作多点用户接入和功率分配[J]. 电子学报, 2024, 52(12): 4009-4014.

LIU Huan-lin, HU Yang, CHEN Yong, et al. Coordinated Multipoint Based User Access and Power Allocation for Indoor VLC-NOMA Network[J]. Acta Electronica Sinica, 2024, 52(12): 4009-4014.
刘焕淋, 胡阳, 陈勇, 等. 室内VLC-NOMA网络的协作多点用户接入和功率分配[J]. 电子学报, 2024, 52(12): 4009-4014. DOI：10.12263/DZXB.20230891

LIU Huan-lin, HU Yang, CHEN Yong, et al. Coordinated Multipoint Based User Access and Power Allocation for Indoor VLC-NOMA Network[J]. Acta Electronica Sinica, 2024, 52(12): 4009-4014. DOI：10.12263/DZXB.20230891

摘要

可见光通信与非正交多址技术结合，是满足室内高速通信和宽带数据接入的重要方法.由于室内密集设备通信需求增长，小区间干扰和资源紧缺日趋严重，为了降低小区间干扰，进一步增强室内用户设备高速通信的用户体验质量（Quality of Experience，QoE）和提高可见光通信的频谱资源利用率，提出室内基于非正交多址接入的可见光通信（Visible Light Communication-Non-Orthogonal Multiple Access，VLC-NOMA）协作多点用户接入和功率分配算法.在用户接入阶段，设计基于QoE和多接入点协作的用户接入（User Access algorithm based on User Experience Quality and Coordinated Multipoint，UA-UEQCM）算法，根据用户需求的最小速率、推荐速率值和VLC-NOMA提供的可达速率，评估用户的QoE值和等效的用户满意度值；然后，基于VLC-NOMA中用户需求的平均意见评分（Mean Opinion Score，MOS）和VLC接入点协作可用资源，设计NOMA用户组的效用函数优化用户设备与多个接入点协作接入的双向选择，提高VLC-NOMA网络的MOS值；在功率分配阶段，采用改进教与学优化方法优化NOMA组的功率分配，设计VLC-NOMA的总MOS值为适应度函数值，采用自适应更新和学习模式，优化NOMA组的功率分配因子.仿真结果显示，与其他接入算法和功率分配比较，当用户数目为26时，本文提出的接入算法和功率分配分别比VLC-NOMA网络的总MOS值提高18.06%和10.94%.

Abstract

The combination of visible light communication (VLC) and non-orthogonal multiple access (NOMA) technology is an important method to meet the needs of indoor high speed communication and broadband data access. Due to the increasing demand for indoor dense communication

inter cell interference (ICI) and resource scarcity are becoming increasingly severe. In order to reduce the ICI

further enhance the quality of experience (QoE) of indoor user’s high-speed communication

and improve the spectrum resource utilization for VLC

a collaborative multi-point user access and power allocation algorithm is proposed for indoor VLC-NOMA. In the user access stage

a user access algorithm based on user needs of QoE and coordinated multi-point (UA-UEQCM) accessing VLC is designed. We can evaluate the QoE and equivalent mean opinion score (MOS) in terms of user’s satisfaction value

according to the minimum rate required by user

the recommended rate value required by user

and the achievable rate provided by VLC-NOMA. Then

based on the MOS user required and the available resource of coordinated access point in VLC-NOMA

a utility function of NOMA group is put forward to optimize the bidirectional selection between user equipment and coordinated multiple access points of VLC for improving MOS in VLC-NOMA network. In the power allocation stage

a power allocation algorithm by using improved teaching and learning (PA-ITL) is adopted to optimize the power allocation of the NOMA group. We design the total MOS value of VLC-NOMA as the fitness function value

and use adaptive updating and learning modes to optimize the NOMA group’s power allocation factor. The simulation results show that

compared with the comparison user access algorithm and power allocation

when the number of users is 26

the proposed user access algorithm and power allocation can improve the total MOS value by up to 18.06% and 8.60% for indoor VLC-NOMA networks

respectively.

关键词

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references

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