一种基于Beta分布的NB-IoT接入方案

李梦雅; 李正权

doi:10.11959/j.issn.2096-3750.2021.00216

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一种基于Beta分布的NB-IoT接入方案

理论与技术 | 更新时间：2024-06-05

- 一种基于Beta分布的NB-IoT接入方案
- A NB-IoT access scheme based on Beta distribution
- 物联网学报 2021年5卷第3期页码：70-77
- 作者机构：
- 作者简介：
  
  [ "李梦雅（1997- ），女，江南大学物联网工程学院硕士生，主要研究方向为NB-IoT的海量接入" ]
  [ "李正权（1976- ），男，江南大学教授，主要研究方向为大规模MIMO技术、协作通信、物联网等" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(61571108);无锡市科技发展资金项目;The Wuxi Science and Technology Devel-opment Fund(H20191001);无锡市科技发展资金项目;The Wuxi Science and Technology Devel-opment Fund(G20192010);江苏省研究生科研与实践创新计划项目;The Postgraduate Research and Practice Innovation Program of Jiangsu Province(SJCX20_0781)
- DOI：10.11959/j.issn.2096-3750.2021.00216
  中图分类号： TN929.5
- 纸质出版日期：2021-09-30，
  
  网络出版日期：2021-09，
- 稿件说明：
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李梦雅, 李正权. 一种基于Beta分布的NB-IoT接入方案[J]. 物联网学报, 2021,5(3):70-77.

MENGYA LI, ZHENGQUAN LI. A NB-IoT access scheme based on Beta distribution. [J]. Chinese journal on internet of things, 2021, 5(3): 70-77.
李梦雅, 李正权. 一种基于Beta分布的NB-IoT接入方案[J]. 物联网学报, 2021,5(3):70-77. DOI： 10.11959/j.issn.2096-3750.2021.00216.

MENGYA LI, ZHENGQUAN LI. A NB-IoT access scheme based on Beta distribution. [J]. Chinese journal on internet of things, 2021, 5(3): 70-77. DOI： 10.11959/j.issn.2096-3750.2021.00216.

摘要

作为低功率广域物联网新兴技术之一，窄带物联网（NB-IoT

narrow band Internet of things）面临着终端海量连接的压力和挑战。针对实际应用场景，提出一种Beta分布下的前导码分配方案，该方案首先计算各时隙设备能耗度，并按照平均能耗度和累计能耗度两种分组方式将设备划分为高能耗度设备组和低能耗度设备组，然后优先将前导码分配给高能耗度设备组，剩余前导码和高能耗度设备组冲突前导码分配给低能耗度设备组。仿真结果表明，与传统随机分配方案相比，所提方案能够有效提高 NB-IoT 系统平均接入成功率和平均吞吐量，同时能有效降低退避时间。

Abstract

As one of the emerging technologies of low-power wide-area Internet of things

narrow band Internet of things (NB-IoT) faces the pressure and challenge of massive connections of terminals.Aiming at practical application scenarios

a preamble allocation scheme based on Beta distribution was proposed.In this scheme

the energy consumption of each time slot device was firstly calculated.The equipment was divided into high energy consumption according to two grouping methods: average energy consumption and cumulative energy consumption.The preamble was assigned to the high-energy-consuming device group first

and the remaining preamble and the conflicting preamble of the high-energy-consuming device group were assigned to the low-energy-consuming device group.The simulation results show that compared with the traditional random allocation scheme

the proposed scheme can effectively improve the average access success rate and average throughput of the NB-IoT system

and can effectively reduce the back off time.

关键词

NB-IoT前导码能耗度接入成功率平均吞吐量

Keywords

NB-IoTpreambleenergy consumptionaccess success rateaverage throughput

references

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