基于负载量预测的卫星物联网随机接入研究
Research on Random Access of Satellite Internet of Things Based on Load Prediction
茆习文 1王海涛 1张更新1
作者信息
- 1. 南京邮电大学通信与信息工程学院,江苏 南京 210003
- 折叠
摘要
在卫星物联网蓬勃发展的过程中,随机接入协议因其信令开销较小、传输效率高、灵活性高、实现容易的特点被视为最适宜的通信协议,但由于负载变化剧烈,常规随机接入方式只在特定负载范围内具有优势,动态分配随机接入资源需要获取准确的时隙接入申请量.针对以上问题,提出一种随机接入自适应方案,可以根据未来负载量大小自适应选取恰当的随机接入方式,从而提高系统吞吐量,其中,负载量大小可以通过提出的负载量估计及预测方案得到.在传输环境存在窄带干扰时,引入扩频通信手段,使得随机接入自适应方案能够成功运行,并且提出的扩频随机接入自适应方案提升了系统吞吐量.
Abstract
In the process of the vigorous development of satellite internet of things,random access protocol is regarded as the most suitable communication protocol due to its characteristics of low signaling overhead,high transmission efficiency,high flexibility and easy implementation.However,due to drastic load changes,conventional random access mode only has advantages in the specific load range.Dynamic allocation of random access resources requires the accurate number of time slot access applications.In view of the above problems,a random access adaptive scheme was proposed,which could adaptively selected the appropriate random access mode according to the future load size,so as to improved the system throughput.The load size could be obtained through the proposed load estimation and prediction scheme.When narrowband interference exists in the transmission environment,the spread-spectrum commu-nication means was introduced to made the adaptive scheme of random access run successfully.Moreover,the proposed adaptive scheme also improved the system throughput.
关键词
卫星物联网/随机接入/负载量预测/负载量估计/扩频通信Key words
satellite internet of things/random access/load prediction/load estimation/spread spectrum communication引用本文复制引用
基金项目
国家自然科学基金面上项目(62171234)
国家自然科学基金区域创新发展联合基金重点项目(U21A20450)
出版年
2023
国家科技期刊平台
NSTL
维普
万方数据