|
|
论文:2017,Vol:35,Issue(4):683-689 |
|
|
引用本文： |
|
|
周润, 李波, 杨懋, 闫中江, 左晓亚. 面向QoS的下一代WLAN OFDMA多址接入协议[J]. 西北工业大学学报 |
|
|
Zhou Run, Li Bo, Yang Mao, Yan Zhongjiang, Zuo Xiaoya. QoS-Oriented OFDMA MAC Protocol for the Next Generation WLAN[J]. Northwestern polytechnical university |
|
|
|
|
|
|
|
| 面向QoS的下一代WLAN OFDMA多址接入协议 |
|
| 周润, 李波, 杨懋, 闫中江, 左晓亚 |
|
| 西北工业大学 电子信息学院, 陕西 西安 710129 |
| 摘要: |
| 随着无线服务的日趋多样化和业务量的爆炸式增长，服务质量（quality of service，QoS）的保障是下一代无线局域网（wireless local area network，WLAN）的重要目标之一。正交频分多址（orthogonal frequency division multiple access，OFDMA）是下一代WLAN的重要特性，然而已有的关于下一代WLAN的多址接入协议研究或者较少关注QoS保障，或者对于公平性保障较差。文章提出了一种面向QoS的下一代WLAN OFDMA多址接入协议：QoS-OFDMA。该协议引入了2次OFDMA并行随机接入的思想，第1次随机接入不区分业务优先级，从而保障了公平性；进一步允许第1次随机接入失败的高优先级用户，在分配剩余的可用子信道上，进行第2次随机接入，从而保障了高优先级业务的QoS。仿真结果表明，与RA-OFDMA协议和OMAX协议相比，QoS-OFDMA高优先级业务吞吐量分别提升了22.05%和89.6%，同时很好地保障了低优先级业务公平性。 |
| 关键词:
无线局域网
多址接入协议
服务质量
正交频分多址
802.11ax
|
|
| QoS-Oriented OFDMA MAC Protocol for the Next Generation WLAN |
|
| Zhou Run, Li Bo, Yang Mao, Yan Zhongjiang, Zuo Xiaoya |
|
| School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710129, China |
| Abstract: |
| With the increasingly diverse services and the explosively growing traffic, quality of services (QoS) guarantee is one of the most important goals of next generation wireless local area network (WLAN). Orthogonal frequency division multiple access (OFDMA) is an important feature of next generation WLAN. However, many existing studies focusing on the media access control protocol of the next generation WLAN neglect the guarantee of QoS and fairness. In this paper, we propose a QoS oriented OFDMA multiple access protocol for the next generation WLAN, named QoS-OFDMA. QoS-OFDMA introduces two times random access. The first random access does not distinguish the service priority, which guarantees the fairness. Meanwhile, the high-priority users failing to first random access are allowed to perform a second random access on the remaining available sub-channel. Thus, it improves the QoS of the high priority traffic. Simulation results show that compared with RA-OFDMA protocol and OMAX protocol, QoS-OFDMA high-priority service throughput outperform both by 22.05% and 89.6% respectively, and also guarantee the fairness requirement. |
| Key words:
wireless local area network
media access control protocol
quality of service
OFDMA
802.11ax
|
|
| 收稿日期: 2017-02-28
修回日期:
|
| DOI: |
| 基金项目: 国家自然科学基金（61271279、61501373）、国家科技重大专项（2016ZX03001018-004）与中央高校基本科研业务费（3102017ZY018）资助 |
| 通讯作者:
Email： |
| 作者简介: 周润(1982—),西北工业大学博士研究生,主要从事下一代无线局域网多址接入技术研究。
|
|
| 相关功能 |
|
|
|
|
| 作者相关文章 |
|
| 周润 在本刊中的所有文章 |
| 李波 在本刊中的所有文章 |
| 杨懋 在本刊中的所有文章 |
| 闫中江 在本刊中的所有文章 |
| 左晓亚 在本刊中的所有文章 |
|
|
|
|
|
|
|
|
参考文献: |
|
|
[1] Li B, Qu Q, Yan Z, et al. Survey on OFDMA Based MAC Protocols for the Next Generation WLAN[C]//Wireless Communications and Networking Conference Workshops, 2015: 131-135
[2] Zhao H, Zhang S, Wei J, et al. Channel Width Adaptation and Access in High-Density WiFi Networks[C]//2014 NRSI General Assembly and Scientific Symposium, 2014: 1-4
[3] Park M, Akhmetov D. HEW MAC Efficiency Analysis for HEW SG[S]. IEEE 802. 11-13/0505r0, 2013
[4] Hwang T, Yang C, Wu G, et al. OFDM and Its Wireless Applications: A Survey[J]. IEEE Trans on Vehicular Technology, 2009, 58(4): 1673-1694
[5] Deng D J, Chen K C, Cheng R S. IEEE 802.11ax: Next Generation Wireless Local Area Networks[C]//2014 10th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, 2014: 77-82
[6] Cariou J L, Hélard J E. Efficient MAC Protocols Optimization for Future High Density WLANS[C]//2015 IEEE Wireless Communications and Networking Conference, New Orleans, LA, 2015: 1054-1059
[7] Robert Stacey. Specification Framework for TGax[S]. IEEE 802.11-15/0132r13
[8] Wang Lei, Lou Huiling. Proposed 802.11ax Functional Requirements[S]. IEEE 802.11, 2014, NO.0567r7
[9] Bellalta B. IEEE 802.11ax: High-Efficiency WLANS[J]. IEEE Wireless Communications, 2016, 23(1): 38-46
[10] Stacey R, Azizi S, Huang R K, et al. IEEE P802.11Wireless LANs Proposed TGax Draft Specification[EB/OL].(2016-11-01).https://mentor.ieee.org/802.11/dcn/16/11-16-0024-01-00ax-proposed-draft-specification.docx
[11] Qu Q, Li B, Yang M, et al. An OFDMA Based Concurrent Multiuser MAC for Upcoming IEEE 802.11 ax[C]//Wireless Communications and Networking Conference Workshops, 2015: 136-141
[12] Wang X, Wang H. A Novel Random Access Mechanism for OFDMA Wireless Networks[C]//IEEE Global Tele Communications Conference, 2010:1-5
[13] Haile G, Lim J. C-OFDMA: Improved Throughput for Next Generation WLAN Systems Based on OFDMA and CSMA/CA[C]//2013 4th International Conference on Intelligent Systems Modelling Simulation, 2013: 497-502
[14] Zhou H, Li B, Yan Z, et al. An OFDMA Based Multiple Access Protocol with QoS Guarantee for Next Generation WLAN[C]//2015 IEEE International Conference on Signal Processing, Communications and Computing, 2015: 1-6 |
|
|
|
|
|
|
|
