面向Critical MTC的无连接传输
Connection-Free Transmission for Critical MTC
李志岗 1袁志锋 1董展谊 1李文斌 1梁楚龙1
作者信息
- 1. 中兴通讯股份有限公司,中国 深圳 518057;移动网络和移动多媒体技术国家重点实验室,中国 深圳 518055
- 折叠
摘要
关键机器类通信(Critical MTC)对时延和可靠性都有极高的要求.支持海量Critical MTC的终端是一个巨大挑战.提出了一种面向海量Critical MTC终端的无连接传输方案.为了降低时延,提出了基于竞争的无连接单次传输方案;为了实现高可靠性,设计了具有极低导频碰撞概率的稀疏正交多导频.进一步利用大规模多输入多输出(MIMO)的增益来提高可靠性以及在空域复用大量用户.仿真结果表明,提出的方案可以支持海量Critical MTC终端,同时满足低时延和高可靠的严格要求.
Abstract
Critical machine-type communication(Critical MTC)has extremely high requirements for latency and reliability.Supporting massive critical MTC terminals simultaneously is a huge challenge.A connection-free transmission scheme for critical MTC is proposed.To reduce latency,a contention-based connection-free one-shot transmission scheme is proposed.To achieve ultra-reliability,multiple sparse or-thogonal pilots with extremely low probability of pilot collision are designed.Furthermore,the gain of massive multiple-input multiple-output(MIMO)is used to improve reliability and multiplex a large number of users in the spatial domain.The simulation results show that the proposed scheme can support a large number of critical MTC terminals while meeting the stringent requirements of low latency and ultra-reliability.
关键词
无连接传输/Critical/MTC/低时延高可靠/导频碰撞/稀疏正交导频Key words
connection-free transmission/Critical MTC/ultra reliable low latency/pilot collision/sparse orthogonal pilot引用本文复制引用
基金项目
国家重点研发计划项目(2020YFB1807202)
广东省重点领域研发计划(2019B010157002)
出版年
2024
NETL
NSTL
万方数据