| A new access scheme in OFDMA systems |
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| 作者姓名： | GU Xue-lin YAN Wei TIAN Hui ZHANG PingWireless Technology Innovation |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 1 Introduction Orthogonal frequency division multiple access (OFDMA) technology has been emerged as one of the prime multiple access schemes for broadband wireless networks, for example, IEEE 802.16a-h 1, 2], IEEE 802.20 3], and so on. On the other hand…
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| 收稿时间： | 12 June 2006 |
A new access scheme in OFDMA systems |
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| GU Xue-lin,YAN Wei,TIAN Hui,ZHANG PingWireless Technology Innovation.A new access scheme in OFDMA systems[J].The Journal of China Universities of Posts and Telecommunications,2006,13(3):29-33. |
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| Authors: | GU Xue-lin YAN Wei TIAN Hui ZHANG Ping |
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| Affiliation: | Wireless Technology Innovation WTI Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | This article presents a dynamic random access scheme for orthogonal frequency division multiple access (OFDMA) systems. The key features of the proposed scheme are: it is a combination of both the distributed and the centralized schemes, it can accommodate several delay sensitivity classes, and it can adjust the number of random access channels in a media access control (MAC) frame and the access probability according to the outcome of Mobile Terminals access attempts in previous MAC frames. For floating populated packet-based networks, the proposed scheme possibly leads to high average user satisfaction. |
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| Keywords: | random access scheme RACH OFDMA dynamic access probability |
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