Connection-level QoS provisioning in multiple transmission technology-based OFDM system

A state-of-the-art orthogonal frequency division multiplexing (OFDM)-based access system, such as the DiffSeg system [1][2], uses a different set of transmission technologies, e.g., modulation, diversity, packet scheduling, MIMO, for a given packet transmission depending on the traffic type, mobile’s channel condition, etc. In such a system, the two-dimensional resources (represented by both time and frequency) can be divided into multiple transmissions units, called segments, according to a given segment map, where each segment type employs different transmission technologies. We in this paper consider both (1) how to select one segment map out of a finite set of pre-determined maps, and (2) for a selected segment map, which segments to use for each real-time (RT) connection. Both of these problems are addressed in order to maximize the residual resource for non-real-time (NRT) traffic while satisfying the minimum QoS requirement of RT traffic. We formulate an optimization prob...

• Type: Conference
• Year: 2006
• Where: WIOPT
• Authors: Youngkyu Choi, Sunghyun Choi, Sung-Pil Hong
• Keywords: Orthogonal Frequency Division Multiplexing, Segment Map, Transmission Technologies, WIOPT 2006, Wireless Networks