| 在OFDMA中基于跨层结构的自适应资源配置 |
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| 引用本文： | 杨祥,韦岗. 在OFDMA中基于跨层结构的自适应资源配置[J]. 桂林电子科技大学学报, 2005, 25(2): 1-5 |
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| 作者姓名： | 杨祥 韦岗 |
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| 作者单位： | 华南理工大学,电子与信息学院,广东,广州,510640;华南理工大学,电子与信息学院,广东,广州,510640 |
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| 基金项目： | 国家自然科学基金(60172048，60101002)，教育部博士点基金(2001561007) |
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| 摘 要： | OFDMA在BWA系统中得到越来越多的应用。基于跨层网络结构,在OFDMA系统中提出了公平自适应资源分配方案。该方案在保证系统的频谱利用率的同时,以用户在链路层的排队延迟相等作为分配子载波和功率的条件。仿真结果显示这个方案比IEEE802.16a中方案能缩短1/3最大延迟与最小延迟的差距,减少几乎一半的平均延迟,而且可以提高0.4bps/Hz的频谱利用率。
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| 关 键 词： | OFDMA 跨层结构 服务质量(QoS) 自适应资源配置 |
| 文章编号： | 1001-7437(2005)02-01-05 |
| 修稿时间： | 2005-01-15 |
Fair Resource Allocation for OFDMA Systems Based on Cross-layer Architecture |
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| YANG Xiang,WEI Gang. Fair Resource Allocation for OFDMA Systems Based on Cross-layer Architecture[J]. Journal of Guilin University of Electronic Technology, 2005, 25(2): 1-5 |
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| Authors: | YANG Xiang WEI Gang |
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| Abstract: | Orthogonal Frequency Division Multiple Access (OFDMA) gains an increasing attention for broadband wireless access (BWA) system. In this paper, a fair resource allocation scheme based on cross-layer architecture is presented, which could provide each user an equal delay in the queue of data link layer. The new scheme assigns sub-carriers and transmission power among users according to their delay in the queue of data link layer. Numerical results show that our scheme can get about 1/3 gap less between maximum and minimal delay, almost less than half of the average waiting time, and 0.4bps/Hz spectrum utilization more than the scheme in IEEE802.16a. |
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| Keywords: | OFDMA cross-layer quality of service (QoS) adaptive resource allocation |
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