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http://dx.doi.org/10.5573/ieie.2015.52.5.003

Selection of Cross-layered Retransmission Schemes based on Service Characteristics  

Go, Kwang-Chun (Ajou University)
Kim, Jae-Hyun (Ajou University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.5, 2015 , pp. 3-9 More about this Journal
Abstract
The wireless communication system adopts an appropriate retransmission scheme on each system protocol layer to improve reliability of data transmission. In each system protocol layer, the retransmission scheme operates in independently other layers and operates based on the parameters without reference to end-to-end performance of wireless communication system. For this reason, it is difficult to design the optimal system parameters that satisfy the QoS requirements for each service class. Thus, the performance analysis of wireless communication system is needed to design the optimal system parameters according to the end-to-end QoS requirements for each service class. In this paper, we derive the mathematical model to formulate the end-to-end performance of wireless communication system. We also evaluate the performance at the MAC and transport layers in terms of average spectral efficiency and average transmission delay. Based on the results of performance evaluations, we design the optimal system parameters according to the QoS requirements of service classes. From the results, the HARQ combined with AMC is appropriate for the delay-sensitive service and the ARQ combined with AMC is appropriate for a service that is insensitive to transmission delay. Also, the TCP can be applied for the delay-insensitive service only.
Keywords
Cross-layer; Retransmission; End-to-end performance;
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