Effect of RLC Transmission Modes for Differentiated Traffic Types in HSDPA via GEO Satellite

This paper investigates the effect of the Radio Link Control (RLC) operation modes for different types of UMTS traffic over a Satellite High Speed Downlink Packet Access (SHSDPA) air interface. Satellite Systems are expected to complement the terrestrial access network and work with the same core network. The geostationary bent-pipe satellite has been considered for this work. The transmission of different traffic types was observed for both Acknowledge Mode (AM) and Unacknowledged Mode (UM) by investigating the effect of the cross-layer interactions between the application layer and RLC sub-layer of the data link layer. Our aim is to recommend which transmission mode is best for each traffic types and to compare the results with the Terrestrial HSDPA air interface scenario. KeywordsS-HSDPA;GEO Satellite;RLC Mode; Acknowledged Mode; Unacknowledged Mode