优化WiMAX网络的系统容量和应用延迟

Iwan Adhicandra, R. Garroppo, S. Giordano
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引用次数: 7

摘要

IEEE 802.16技术(WiMAX)由于其覆盖面积大、部署成本低和数据速率高,是一种很有前途的技术,可以通过无线电链路提供最后一英里的连接。但是,当前系统中定义的最大通道数可能会导致潜在的瓶颈,并限制整个系统的容量。本文的目的是比较不同的解决方案对系统性能的影响,以减轻由于无线电信道的损害。特别考虑到WiMAX系统容量和应用延迟,给出了采用静态QPSK 1 / 2调制编码方案(MCS)时的仿真结果。然后,研究旨在评估自适应调制编码(AMC)和AMC与混合自动重复请求(HARQ)联合采用所带来的改进。结果表明,最好的策略是使用一个积极的AMC表与HARQ。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimizing system capacity and application delays in WiMAX networks
The IEEE 802.16 technology (WiMAX) is a promising technology for providing last-mile connectivity by radio link due to its large coverage area, low cost of deployment and high speed data rates. However, the maximum number of channels defined in the current system may cause a potential bottleneck and limit the overall system capacity. The aim of this paper is to compare the impact on system performance of different solutions used to mitigate the impairments due to the radio channel. In particular, taking into account the WiMAX system capacity as well as application delays, the paper presents the simulation results obtained when a static QPSK ½ Modulation and Coding Scheme (MCS) is adopted. Then, the study is aimed at evaluating the improvements introduced by the adoption of an adaptive modulation and coding (AMC) and an AMC jointly with Hybrid Automatic Repeat reQuest (HARQ). Results indicate that the best strategy is to use an aggressive AMC table with HARQ.
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