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Unequal Error Protection in Coded Slotted ALOHA

Mikhail Ivanov (Institutionen för signaler och system, Kommunikationssystem) ; Fredrik Brännström (Institutionen för signaler och system, Kommunikationssystem) ; Alexandre Graell i Amat (Institutionen för signaler och system, Kommunikationssystem) ; G. Liva
IEEE Wireless Communications Letters (2162-2337). Vol. 5 (2016), 5, p. 536-539.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Coded slotted ALOHA, decoding delay, error floor, unequal error protection, RANDOM-ACCESS, Computer Science, Information Systems, Engineering, Electrical &,Electronic Telecommunications



Denna post skapades 2016-11-25.
CPL Pubid: 245636

 

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Projekt

Denna publikation är ett resultat av följande projekt:


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Signal Recovery: Compressed Sensing meets Coding Theory (VR//2011-5961)

Cooperative Situational Awareness for Wireless Networks (COOPNET) (EC/FP7/258418)