| 引用本文: | 魏绍亮,张 帅,程奉玉,等.低压电力线通信带宽自适应分配策略研究[J].电力系统保护与控制,2021,49(21):123-131.[点击复制] |
| WEI Shaoliang,ZHANG Shuai,CHENG Fengyu,et al.Adaptive bandwidth allocation strategy for low-voltage power line communication[J].Power System Protection and Control,2021,49(21):123-131[点击复制] |
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| 摘要: |
| 目前人们对信息传输的需求越来越高，低压电力线载波通信已经成为解决“最后一公里”问题的优选方案，但这种通信方式带宽资源有限且没有建立高效的带宽分配策略。针对低压电力线带宽高效分配问题，提出了一种基于最优平稳模型的带宽自适应分配策略(Dynamic Bandwidth Allocation for Power Line Communication, DBA-PLC)。DBA-PLC以通信质量评估值为决策变量，采用最优平稳模型并行训练方法自适应地分配带宽，并利用数据筛除的方式进行算法简化。经过仿真实验，验证了该策略的可行性。得出数据筛除率在 20% ~30%范围内时，能够在占用资源较少的情况下，得到理想的带宽分配结果。并证明了带宽分配结果在信道变化率低于 0.25 时具有持续有效性，即在一定时间周期内更新一次带宽分配策略，就能保证通信的高带宽利用率。 |
| 关键词: 带宽分配 自适应 最优平稳模型 动态规划模型 数据筛除率 |
| DOI：DOI: 10.19783/j.cnki.pspc.201539 |
| 投稿时间：2020-12-11修订日期：2021-05-31 |
| 基金项目:山东省自然科学基金项目资助“低压电力线上高速数字信号传输中基于小波基的OFDM群分策略研究”(ZR2010FM041) |
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| Adaptive bandwidth allocation strategy for low-voltage power line communication |
| WEI Shaoliang,ZHANG Shuai,CHENG Fengyu,WANG Haoqi,YANG Yuanjia |
| (College of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China) |
| Abstract: |
| The demand for information transmission is ever increasing. Low-voltage power line communication has become one of the preferred solutions to solve the "last kilometer" problem. However, this communication mode is limited by the lack of bandwidth resources and there is no efficient bandwidth allocation strategy. In order to solve this problem, a dynamic bandwidth allocation for Power Line Communication (DBA-PLC) based on an optimal stationary model is proposed. DBA-PLC takes communication quality evaluation as the decision variable, adopts a parallel training method of an optimal stationary model to allocate bandwidth adaptively, and optimizes the algorithm by data filtering. Through simulation experiments, the feasibility of the strategy is verified. It is concluded that when the data filtering rate is 20%~30%, an ideal bandwidth allocation result can be obtained under with less resource occupation. It is proved that the bandwidth allocation result has continuous effectiveness when the channel change rate is less than 0.25, that is, updating the bandwidth allocation strategy once in a certain period of time can ensure the high bandwidth utilization of communication.
This work is supported by the Natural Science Foundation of Shandong Province “Study on Wavelet Basis-based OFDM Grouping Strategy in the Low-voltage Power Line High-speed Digital Signal Transmission” (No. ZR2010FM041). |
| Key words: bandwidth allocation adaptive optimal stationary model dynamic programming model data filtering rate |
