Design and implementation of subchannelization scheduler in IEEE 802.16 broadband wireless access systems
| Autor: | Hsien Wei Tseng, Yen Hsih Chou, Yih Guang Jan, Yang-Han Lee, Shiann Tsong Sheu, Ming Hsueh Chuang |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Journal of the Chinese Institute of Engineers. 31:967-976 |
| ISSN: | 2158-7299 0253-3839 |
| DOI: | 10.1080/02533839.2008.9671451 |
| Popis: | In this paper we propose a method of using a heuristic Genetic Algorithm (GA) to solve the Fast Fourier Transform subchannelization scheduling (FFTSS) problem in IEEE 802.16 broadband wireless access systems. In such a multi-user transmission system with quality of service (QoS) requirements, data from different users should be quickly scheduled and transmitted within the shortest transmission time period. In this paper, we propose a GA-based scheduler that will search the best configurations of the uplink and/or downlink sub-frames in order to obtain the optimal system throughput as well as quality of services. Due to the slow convergence of conventional GAs, we design a novel hardware architecture to accelerate the processing speed of GA which is used for scheduling the Down Link (DL) sub-frames. We then describe the procedure of using Field-Programmable Gate-Array (FPGA) to implement the designed hardware to verify the convergence of the algorithm. With this hardware implementation, the proposed method indeed helps us to construct a fast optimization tool to be applied in broadband wireless communication systems. |
| Databáze: | OpenAIRE |
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