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An Adaptive Hot-spot Operating Scheme in Vertically Overlaid OFDMA Wireless Systems  

Choi Hye-Sun (이화여자대학교 정보통신학과 이동통신 연구실)
Chung Hee-Jeong (이화여자대학교 정보통신학과 이동통신 연구실)
Kim Nak-Myeong (이화여자대학교 정보통신학과 이동통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.7A, 2005 , pp. 620-627 More about this Journal
Abstract
We develop an adaptive hot-spot operating scheme(AHOS) to mitigate the negative effects from the nonuniform distribution of user location and the variation in the mixture of QoS requirements in OFDMA downlink systems. The base station in a macrocell can control the operation of picocells within the cell, and turns on or off according to the changes in the estimated user outage probability and the AHOS gain parameter. With the computer simulation, the AHOS has been proved to maximize the system throughput while maintaining the QoS outage probability very low under various system scenarios.
Keywords
hot-spot; OFDM; OFDMA; resource allocation; QoS;
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