《计算机应用》唯一官方网站 ›› 2023, Vol. 43 ›› Issue (1): 209-214.DOI: 10.11772/j.issn.1001-9081.2021111946

所属专题: 网络与通信

• 网络与通信 • 上一篇    下一篇

实时工业物联网的功率域非正交多址接入基站选址算法

孙源1, 沈文建1, 倪朋勃1, 毛敏1, 谢雅琪2, 徐朝农2   

  1. 1.中法渤海地质服务有限公司,天津 300450
    2.中国石油大学(北京) 信息科学与工程学院,北京 102249
  • 收稿日期:2021-11-15 修回日期:2022-04-26 发布日期:2022-05-11
  • 作者简介:孙源(1972—),男,天津人,工程师,硕士,主要研究方向:工业无线网络、石油录井;沈文建(1978—),男,江苏南通人,高级工程师,硕士,主要研究方向:石油录井;倪朋勃(1978—),男,陕西乾县人,高级工程师,硕士,主要研究方向:石油录井;毛敏(1968—),男,湖北天门人,高级工程师,硕士,主要研究方向:石油录井;谢雅琪(1988—),女,河北廊坊人,硕士研究生,主要研究方向:5G网络;徐朝农(1975—),男,安徽巢湖人,副教授,博士,CCF会员,主要研究方向:工业无线网络、智慧物联网。 email:xuchaoonong@cup.edu.cn;
  • 基金资助:
    国家自然科学基金资助项目(61971178)。

Sink location algorithm of power domain nonorthogonal multiple access for real-time industrial internet of things

SUN Yuan1, SHEN Wenjian1, NI Pengbo1, MAO Min1, XIE Yaqi2, XU Chaonong2   

  1. 1.China France Bohai Geoservices Company Limited, Tianjin 300450, China
    2.College of Information Science and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2021-11-15 Revised:2022-04-26 Online:2022-05-11
  • Contact: XU Chaonong, born in 1975, Ph. D., associate professor. His research interests include industrial wireless networks, intelligent internet of thing.
  • About author:SUN Yuan, born in 1972, M. S., engineer. His research interests include industrial wireless networks, petroleum well-logging;SHEN Wenjian, born in 1978, M. S., senior engineer. His research interests include petroleum well-logging;NI Pengbo, born in 1978, M. S., senior engineer. His research interests include petroleum well-logging;MAO Min, born in 1968, M. S., senior engineer. His research interests include petroleum well-logging;XIE Yaqi, born in 1988, M. S. candidate. Her research interests include 5G network;
  • Supported by:
    This work is partially supported by National Natural Science Foundation of China (61971178).

摘要: 针对工业物联网(IoT)中接入延迟较大的问题,提出一种实时工业IoT的功率域非正交多址接入(PD-NOMA)基站选址算法。该算法在PD-NOMA技术的基础上,以数据收集基站的位置为优化手段,通过最大限度地实现用户功率分复用来实现接入延迟的最小化。首先,证明对任意两用户若实现它们的并行传输,则合格的基站可解码区域必为圆,因此,所有的两用户组合可得到基站可解码区域的集合,且集合中区域间的每个最小相交区域必为凸区域,从而可知这些最小相交区域必定包含数据收集基站的最优位置。然后,对于每一个最小相交区域,以基站放置在该区域的网络生成图的最小链划分数作为接入延迟的度量标准。最后,通过最小链划分数的比较得出基站的最优位置。实验结果表明,解码阈值为2用户数为30时,所提算法的平均接入延迟降低为经典时分多路方式的36.7%,并且随着解码阈值的降低和信道衰减因子的增加,接入延迟可获得近似线性的降低。所提算法对海量超可靠低延迟通信从接入层角度提供了参考。

关键词: 工业物联网, 接入延迟, 功率域非正交多址接入, 最小链划分, 选址

Abstract: Aiming at the shortcoming of large access delay in industrial Internet of Things (IoT), a sink location algorithm of Power Domain NonOrthogonal Multiple Access (PD-NOMA) for real-time industrial IoT was proposed. In this algorithm, based on the PD-NOMA technology, the location of the sink was used as an optimization method to minimize access delay by realizing power division multiplexing among users as much as possible. Firstly, for any two users, an assertion that the decodable area of the qualified sink must be a circle if parallel transmissions are successful was proven, and therefore, the decodable area set of the sink was able to be obtained by combining all of the combinations of two users, and every minimal intersection of the area set must be a convex region. So, the optimal location of the sink must be included in these minimal intersection areas. Secondly, for each minimal intersection area where the sink was deployed, the minimum number of chain partition of the network generation graph in the area was computed and used as the metric for evaluating the access delay. Finally, the optimal location of the sink was determined by comparing these minimum number of chain partitioning. Experimental results show that when the decoding threshold is 2 and the number of users is 30, the average access delay of the proposed algorithm is about 36.7% of that of the classic time division multiple access, and besides, it can be decreased almost linearly with the decrease of the decoding threshold and the increase of the channel decay factor. The proposed algorithm can provide reference from the access layer perspective for massive ultra-reliable low-latency communications.

Key words: industrial Internet of Thing (IoT), access delay, Power Domain NonOrthogonal Multiple Access (PD-NOMA), minimum chain partition, location

中图分类号: