Radio Resource Allocation and Retransmission Schemes for URLLC Over 5G Networks

被引:88
作者
Elayoubi, Salah Eddine [1 ]
Brown, Patrick [2 ]
Deghel, Matha [3 ]
Galindo-Serrano, Ana [2 ]
机构
[1] Cent Supelec, L2S, UMR8506, F-91190 Gif Sur Yvette, France
[2] Orange Labs, F-92320 Chatillon, France
[3] Nokia Bell Labs, F-91620 Nozay, France
关键词
URLLC; grant-free transmissions; contention-based access; packet replicas; collision; DESIGN;
D O I
10.1109/JSAC.2019.2898783
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Low latency targets for ultra-reliable low latency communications (URLLC) may be conflicting with their stringent reliability requirements due to the need for re-transmissions. We explore, in this paper, the different resource allocation schemes for transmissions and re-transmissions depending on the requirements of the underlying service and on the traffic characteristics, focusing on the Industrial Internet of Things. We, namely, consider schemes with individual reservation versus a pool of contention-based reserved resources. We provide novel resource allocation schemes for initial transmissions and re-transmissions and derive corresponding analytical models for loss rates. We then show how to set the system parameters that allow meeting the URLLC requirements with low resource consumption.
引用
收藏
页码:896 / 904
页数:9
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