Unequal Error Protection in Coded Slotted ALOHA
Artikel i vetenskaplig tidskrift, 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

Författare

Mikhail Ivanov

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Fredrik Brännström

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Alexandre Graell i Amat

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

G. Liva

Deutsches Zentrum fur Luft- Und Raumfahrt

IEEE Wireless Communications Letters

2162-2337 (ISSN)

Vol. 5 536-539

Ämneskategorier

Telekommunikation

Kommunikationssystem

Reglerteknik

DOI

10.1109/lwc.2016.2600322