Retransmission protocol designs and analyses for high speed packet access in 3G systems

Advanced Internet applications combined with high-speed wireless transmissions will provide subscribers with high-quality multimedia services in wireless access, which is to emerge in 3G and future generation wireless networks. A major challenge in the design of future generation wireless networks is to simultaneously achieve high channel utilization and provide required quality of service (QoS) for multimedia applications. This dissertation focuses on the data link layer and media-access sublayer addressing the retransmission schemes for various types of traffic in high speed 3G wireless communication systems.; We examine, analyze and design several retransmission and packet access schemes for high speed wireless communication systems. Basic automatic repeat request (ARQ) scheme designs are analyzed and performance differences between two ARQ approaches (ACK-NAK-based ARQ and NAK-based ARQ) are presented in terms of throughput and delay. Both the random error channel and the correlated fading channel are considered. Unified expressions for evaluating different ARQ strategies with multi-copy retransmissions are obtained for both ACK-NAK-based ARQ and NAK-based ARQ. Hybrid ARQ schemes for variable error rate channels in high speed wireless systems are examined and discussed.; Analyses on random access channel (RACH) and common packet channel (CPCH) access schemes with the consideration of time-slotted behaviors are provided. Previous continuous analysis did not fully characterize the CPCH access scheme. A CPCH scheme with two or more traffic types with different priorities is proposed and its numerical results are presented. Multi-channel hybrid ARQ schemes with correlated error channels are introduced and their throughput performances are compared. These schemes apply to high speed downlink packet access (HSDPA) in wideband code division multiple access (W-CDMA) and orthogonal frequency division multiplexing (OFDM) systems.