A Unified Design of Massive Access for Cellular Internet of Things

被引：55
|
作者：
Shao, Xiaodan [1 ,2 ]
Chen, Xiaoming [1 ,2 ]
Zhong, Caijun [1 ]
Zhao, Junhui [3 ]
Zhang, Zhaoyang [1 ]
机构：
[1] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Minist Ind & Informat Technol, Key Lab Dynam Cognit Syst Electromagnet Spectrum, Nanjing 211106, Jiangsu, Peoples R China
[3] East China Jiaotong Univ, Sch Informat Engn, Nanchang 330013, Jiangxi, Peoples R China
来源：
IEEE INTERNET OF THINGS JOURNAL | 2019年 / 6卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Activity detection; cellular Internet of Things (IoT); channel estimation; lengths allocation; massive access; SIGNAL RECOVERY; COMMUNICATION; OPTIMIZATION; GRAPHS; RELAY;
D O I：
10.1109/JIOT.2019.2893376
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
With the increasing development of the cellular Internet of Things (IoT), the upcoming fifth-generation wireless network is required to support massive access of sporadic traffic devices. In this context, we design a three-phase transmission protocol which consists of device detection and channel estimation, uplink data transmission, and downlink data transmission for the cellular IoT, so as to realize massive access over limited radio spectrum. We analyze the performance of the proposed transmission protocol and derive closed-form expressions for the uplink and downlink achievable rates in terms of channel conditions and system parameters. Moreover, to improve the overall performance, we propose a length allocation algorithm by coordinating the three-phase transmission protocol in the unified sense. Extensive simulation results show that substantial performance gain can be obtained by the proposed algorithm.
引用
收藏
页码：3934 / 3947
页数：14
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