Spatial Clustering Group Based OFDMA Multiple Access Scheme for the Next Generation WLAN (Invited Paper)

The next generation wireless local area network (WLAN) needs to significantly improve the area throughput in high dense scenario. Orthogonal Frequency Division Multiple Access (OFDMA), considered as the key technology of next generation WLAN, has been adopted by next generation WLAN communication standard. However, the existing studies on the OFDMA protocol have the interference extensions problem, i.e. multiple users are located in the dispersive area, and then the geographical interference area is enlarged. In this paper, a spatial clustering group based OFDMA multiple access protocol (SCG-OFDMA) is proposed. SCG-OFDMA enables the users in close area to form spatial clustering groups dynamically, then the users in the spatial clustering group access channel and transmit data by OFDMA. It reduces the geographical interference area, and enhances the area throughput. The theoretical analysis of SCG-OFDMA is also carried out. The simulation results of SCG-OFDMA are in agreement with the theoretical analysis. Simulation results show that the area throughput of SCG-OFDMA is higher than existing OFDMA protocol and distributing coordination function by 15.98% and 31.26% respectively. It provides a reference to design media access control protocol of the next generation WLAN.

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A spatial clustering group division-based OFDMA access protocol for the next generation WLAN

Wireless Networks ◽

10.1007/s11276-019-02115-2 ◽

2019 ◽

Vol 25 (8) ◽

pp. 5083-5097 ◽

Cited By ~ 1

Author(s):

Yong Li ◽

Bo Li ◽

Mao Yang ◽

Zhongjiang Yan

Keyword(s):

Spatial Clustering ◽

Next Generation ◽

Access Protocol ◽

The Next Generation Wlan

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OFDMA Based QoS-Oriented Guarantee Novelty Multiple Access Protocol

Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University ◽

10.1051/jnwpu/20183630543 ◽

2018 ◽

Vol 36 (3) ◽

pp. 543-549

Author(s):

Run Zhou ◽

Bo Li ◽

Mao Yang ◽

Zhongjiang Yan

Keyword(s):

Multiple Access ◽

Wireless Local Area Network ◽

Local Area Network ◽

Mac Protocol ◽

Scheduling Algorithm ◽

Media Access Control ◽

Proportional Fairness ◽

Area Network ◽

Next Generation ◽

The Next Generation Wlan

The next generation wireless local area network (WLAN) 802.11ax standards committee takes high quality of service(QoS) guarantee as one of important technology goals of the next generation WLAN. As a result of a variety of wireless traffics, so the requirements of the QoS must also be varied. However, the existing media access control(MAC) protocol based on orthogonal frequency division multiple access(OFDMA) can’t support QoS diversification and high requirement well. To solve this problem, this paper presents a QoS-oriented OFDMA MAC for the next generation WLAN. On one hand, for backward compatibility consideration, continue to use four priority traffics of 802.11e in this protocol; on the other hand, the introduction of QoS-oriented priority scheduling algorithm to support future wireless traffic feature which is QoS of diversification and high requirements. Finally, through the simulation, the system effective throughput of the proposed QoS-OFDMA MAC is 57.8% and 59% higher than the OFDMA MAC of the sequential scheduling algorithm and the OFDMA MAC of the proportional fairness algorithm.

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