Unequal Error Protection in Coded Slotted ALOHA
Journal article, 2016

We analyze the performance of coded slotted ALOHA systems for a scenario where users have different error protection requirements and correspondingly can be divided into user classes. The main goal is to design the system so that the requirements for each class are satisfied. To that end, we derive analytical error floor approximations of the packet loss rate for each class in the finite frame length regime, as well as the density evolution in the asymptotic case. Based on this analysis, we propose a heuristic approach for the optimization of the degree distributions to provide the required unequal error protection. In addition, we analyze the decoding delay for users in different classes and show that better protected users experience a smaller average decoding delay.

Electronic Telecommunications

Computer Science

Information Systems

Electrical &

unequal error protection

Coded slotted ALOHA

RANDOM-ACCESS

decoding delay

Engineering

error floor

Author

Mikhail Ivanov

Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Fredrik Brännström

Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Alexandre Graell i Amat

Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

G. Liva

Deutsches Zentrum fur Luft- Und Raumfahrt

IEEE Wireless Communications Letters

2162-2337 (ISSN)

Vol. 5 536-539

Subject Categories

Telecommunications

Communication Systems

Control Engineering

DOI

10.1109/lwc.2016.2600322