[1]韦芬芬,刘晓旭,谢继东,等.低轨卫星物联网多址接入方式研究[J].计算机技术与发展,2019,29(05):116-120.[doi:10. 3969 / j. issn. 1673-629X. 2019. 05. 025]
　WEI Fen-fen,LIU Xiao-xu,XIE Ji-dong,et al.Research on Multiple Access Methods for LEO Satellite IoT[J].,2019,29(05):116-120.[doi:10. 3969 / j. issn. 1673-629X. 2019. 05. 025]
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低轨卫星物联网多址接入方式研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
29
期数:
2019年05期
页码:
116-120
栏目:
应用开发研究
出版日期:
2019-05-10

文章信息/Info

Title:
Research on Multiple Access Methods for LEO Satellite IoT
文章编号:
1673-629X(2019)05-0116-05
作者:
韦芬芬1; 刘晓旭2; 谢继东1; 张更新1
1. 南京邮电大学 通信与网络技术国家工程研究中心,江苏 南京 210003;2. 中国空间技术研究院西安分院,陕西 西安 710100
Author(s):
WEI Fen-fen1; LIU Xiao-xu2; XIE Ji-dong1; ZHANG Geng-xin1
1. National Engineering Research Center for Communication and Network Technology, Nanjing University of Posts and Telecommunications,Nanjing 210003,China;2. CAST’Xi’an,Xi’an 710100,China
关键词:
低轨卫星; 物联网; 海量; CRDSA; 多址接入
Keywords:
LEO satellite; Internet of Things; mass; CRDSA; multiple access
分类号:
TN927+. 23
DOI:
10. 3969 / j. issn. 1673-629X. 2019. 05. 025
摘要:
物联网的出现深刻影响了人们的生活和工作方式,但是地面物联网的覆盖范围十分有限,而低轨卫星物联网作为地面物联网的延伸和补充,具有覆盖范围广,单一波束下用户数多等特点,很好地解决了地面物联网的不足。 然而,解决海量用户终端接入,并保证其信息传输的可靠性和时效性是必须要解决的问题。 因此,需要针对低轨卫星通信的特点,设计一种面向物联网海量连接的高效可靠的多址接入协议。 通过研究分析现有的基于争用解决的分集时隙 ALOHA(CRDSA)多址接入协议,针对低轨卫星物联网的工作特点提出了一种改进的多址接入方法,并在该方法的基础上,加入了终端有数据包发送的概率、增大了终端数和终端发送数据包的随机性。 理论分析和仿真结果证明了所设计方法的有效性。
Abstract:
The emergence of the Internet of Things (IoT) has a profound impact on people爷s lives and working. However,the coverage of ground IoT is limited. As an extension and supplement of the ground IoT,the IoT of low-orbit satellites has a wide coverage and a large number of users under a single beam,which well solves the shortcomings of the ground IoT. However,it is necessary to solve the problem of mass user terminal access and ensure the reliability and timeliness of its information transmission. Therefore,aiming at the characteristicsof LEO satellite communication, an efficient and reliable multiple access protocol for mass connection of IoT must be designed. Byresearching and analyzing the existing multiple access protocol of contention resolution diversity slotted ALOHA (CRDSA),we design animproved multiple access method for the work characteristics of the IoT. On the basis,the probability of sending packets,the number of terminals and the randomicity of packets sent by terminals are added. Theoretical analysis and simulation results have demonstrated the effectiveness of the proposed method.

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更新日期/Last Update: 2019-05-10