Analysis of irregular repetition spatially-coupled slotted ALOHA  

作　　者：Hanxiao YU Zesong FEI Congzhe CAO Ming XIAO Dai JIA Neng YE 

机构地区：[1]School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China [2]Department of Electrical and Computer Engineering, University of Alberta, Edmonton AB T6G 1H9, Canada [3]School of Electrical Engineering, KTH Royal Institute of Technology, Stockholm 100 44, Sweden

出　　处：《Science China(Information Sciences)》2019年第8期18-30,共13页中国科学（信息科学）（英文版）

基　　金：supported by Beijing Natural Science Foundation (Grant No. L182038);Chinese Ministry of Education-China Mobile Communication Corporation Research Fund (Grant No. MCM20170101);China National S&T Major Project (Grant No. 2017ZX03001017);National Natural Science Foundation of China (Grant No. 61871032);Beijing Major Science and Technology Projects (Grant No. D171100006317001);Ericsson company;111 Project of China (Grant No. B14010)

摘　　要：Contention-based access is a promising technology for massive and sporadic transmissions. In this paper, we propose a novel contention-based multiple access scheme, named irregular repetition spatiallycoupled slotted ALOHA(IRSC-SA), motivated by the spatial coupling and irregular repetition techniques.There are different classes of users and slots in IRSC-SA, which result in unequal protection for different users. Considering that, we derive a novel density evolution(DE) method, which deals with unequal packet protection and introduces Bayesian reasoning to analyze the throughput threshold of the proposed IRSC-SA.Theoretical analysis and simulation results show that the proposed scheme achieves better asymptotic threshold and system packet throughput performance than the conventional spatially-coupled slotted ALOHA.Contention-based access is a promising technology for massive and sporadic transmissions. In this paper, we propose a novel contention-based multiple access scheme, named irregular repetition spatiallycoupled slotted ALOHA(IRSC-SA), motivated by the spatial coupling and irregular repetition techniques.There are different classes of users and slots in IRSC-SA, which result in unequal protection for different users. Considering that, we derive a novel density evolution(DE) method, which deals with unequal packet protection and introduces Bayesian reasoning to analyze the throughput threshold of the proposed IRSC-SA.Theoretical analysis and simulation results show that the proposed scheme achieves better asymptotic threshold and system packet throughput performance than the conventional spatially-coupled slotted ALOHA.

关 键 词：spatial coupling CODED slotted ALOHA contention-based access DENSITY evolution IRREGULAR REPETITION 

分 类 号：TP[自动化与计算机技术]