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Analysis of irregular repetition spatially-coupled slotted ALOHA
Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China..
Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China..
Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada..
KTH, School of Electrical Engineering and Computer Science (EECS), Information Science and Engineering.ORCID iD: 0000-0002-5407-0835
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2019 (English)In: Science China Information Sciences, ISSN 1674-733X, E-ISSN 1869-1919, Vol. 62, no 8, article id 080302Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
SCIENCE PRESS , 2019. Vol. 62, no 8, article id 080302
Keywords [en]
spatial coupling, coded slotted ALOHA, contention-based access, density evolution, irregular repetition
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-257820DOI: 10.1007/s11432-018-9837-9ISI: 000482203000002Scopus ID: 2-s2.0-85068870924OAI: oai:DiVA.org:kth-257820DiVA, id: diva2:1348998
Note

QC 20190906

Available from: 2019-09-06 Created: 2019-09-06 Last updated: 2019-09-06Bibliographically approved

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Xiao, Ming

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