Performance Model of RLP for Packet Data Services in UMTS Systems

LANGUAGE
English
SOURCE
Proc. of IEEE Personal, Indoor and Mobile Radio Communications (PIMRC2004), BARCELONA, SPAIN
Published Date:2004-09-03
ABSTRACT
In this paper we propose a new analytical model of the NAK-based Selective Repeat (SR) ARQ scheme for packet data services in UMTS systems. We analyze the RLP performance over a pair of Markov channels considering imperfect feedback and arrive to adequate formulae for residual FER, data throughput and expected delay as a function of physical layer FER and normalized Doppler bandwidth. Numerical results show that due to the NAK based mechanism, the initial state distribution of forward channel makes the throughput performance benefit from channel correlation.
KEYWORDS
SR ARQ, correlated fading channels, model analysis