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.

Coded slotted ALOHA

Electronic Telecommunications

decoding delay

Computer Science

RANDOM-ACCESS

error floor

Electrical &

unequal error protection

Information Systems

Engineering

Author

Mikhail Ivanov

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

Fredrik Brännström

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

Alexandre Graell i Amat

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

G. Liva

German Aerospace Center (DLR)

IEEE Wireless Communications Letters

2162-2337 (ISSN)

Vol. 5 536-539

Signal Recovery: Compressed Sensing meets Coding Theory

Swedish Research Council (VR), 2012-01-01 -- 2015-12-31.

Cooperative Situational Awareness for Wireless Networks (COOPNET)

European Commission (FP7), 2011-05-01 -- 2016-04-30.

Subject Categories

Telecommunications

Communication Systems

Control Engineering

DOI

10.1109/lwc.2016.2600322