Differentiated Segments Based OFDM system for the Next-Generation Radio Access System

Abstract

Extensive use of Internet and huge demand for multi-media services via portable devices require the development of packet-based radio access systems with high transmission efficiency. Various advanced transmission technologies have recently been proposed to achieve this challenging goal. However, few researches have been reported on the design of an integrated system that can efficiently accommodate these transmission technologies. This paper considers the design of a packet-based cellular system for the next-generation radio access. We propose a novel system framework that can incorporate various transmission technologies such as link adaptation, opportunistic packet scheduling, channel coding and multi-antenna techniques. By analyzing the interoperability between these transmission technologies, we design a differentiated segments-based OFDM system, called DiffSeg, that can support heterogeneous operating conditions in a seamless manner. Simulation results show that the proposed DiffSeg system can provide near optimum performance in a wide variation of wireless channel condition.