| 支持多类型业务的受限负载EDCA性能分析 |
| |
| 引用本文： | 鲁冬,朱容波.支持多类型业务的受限负载EDCA性能分析[J].计算机工程,2010,36(13):122-124. |
| |
| 作者姓名： | 鲁冬 朱容波 |
| |
| 作者单位： | 1. 河南职业技术学院信息工程系,郑州,450046
2. 中南民族大学计算机科学学院,武汉,430074 |
| |
| 基金项目： | 国家自然科学基金资助项目，湖北省自然科学基金资助项目 |
| |
| 摘 要： | 无线局域网增强的分布式信道接入(EDCA)具有支持多类型业务的功能。为准确有效地分析EDCA机制的性能，提出一个考虑多类型业务的受限负载二维马尔可夫性能分析模型。该模型通过引入空闲、后回退等状态来精确刻画饱和与非饱和负载下系统的性能，并考虑EDCA重传次数、后碰撞过程等特征。仿真结果验证了模型的有效性，系统的最大吞吐量出现在非饱和负载情况下。
|
| 关 键 词： | 性能模型 增强的分布式信道访问 无线局域网 |
Performance Analysis of Finite Load EDCA Supporting Multi-class Traffic |
| |
| LU Dong,ZHU Rong-bo.Performance Analysis of Finite Load EDCA Supporting Multi-class Traffic[J].Computer Engineering,2010,36(13):122-124. |
| |
| Authors: | LU Dong ZHU Rong-bo |
| |
| Affiliation: | (1. Department of Information Engineering, Henan Vocational and Technical College, Zhengzhou 450046; 2. College of Computer Science, South-Central University for Nationalities, Wuhan 430074) |
| |
| Abstract: | Enhanced Distributed Channel Access(EDCA) of Wireless Local Area Network(WLAN) can support multi-class traffic. In order to reveal the essence of EDCA mechanism, a bi-dimensional Markov model is proposed to depict the EDCA scheme under finite load. The proposed model employs idle and post backoff states to deduce the channel throughput under both unsaturation case and saturation case, which also considers all characteristics of IEEE 802.11e EDCA, including the retransmissions, post-collision process. Simulation results show the accuracy of the proposed model. The results also reveal that the maximum throughput is achieved at the unsaturation case. |
| |
| Keywords: | performance model Enhanced Distributed Channel Access(EDCA) Wireless Local Area Network(WLAN) |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《计算机工程》浏览原始摘要信息 |
|
点击此处可从《计算机工程》下载全文 |
