ZHENG Yuan, WANG Jiabin, CHEN Qinghua, ZHU Yihua. Retransmission Number Aware Channel Access Scheme for IEEE 802.11ax Based WLAN[J]. Chinese Journal of Electronics, 2020, 29(2): 351-360. doi: 10.1049/cje.2020.01.014
Citation: ZHENG Yuan, WANG Jiabin, CHEN Qinghua, ZHU Yihua. Retransmission Number Aware Channel Access Scheme for IEEE 802.11ax Based WLAN[J]. Chinese Journal of Electronics, 2020, 29(2): 351-360. doi: 10.1049/cje.2020.01.014

Retransmission Number Aware Channel Access Scheme for IEEE 802.11ax Based WLAN

doi: 10.1049/cje.2020.01.014
Funds:  This work is supported by the National Natural Science Foundation of China (No.61772470, No.61432015).
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  • Corresponding author: ZHU Yihua (corresponding author) received his B.S. degree in mathematics from Zhejiang Normal University, Zhejiang, China, in July 1982; his M.S. degree in operation research and cybernetics from Shanghai University, Shanghai, China in April 1993; and his Ph.D. degree in computer science and technology from Zhejiang University, Zhejiang, China, in March 2003. Dr. Zhu is a professor at Zhejiang University of Technology, Hangzhou, Zhejiang, China. He is a member of China Computer Federation Technical Committee on Sensor Network. His current research interests include information dissemination, stochastic modeling and analysis, power management, mobility management for wireless networks, and network coding. He has served as technical program committee members or co-chairs in the international conferences IEEE ICC, WCNC, GlobeCom, DCOSS, etc. He is the recipient of the Best Paper Award of Chinacom 2008. He has published more than 200 research papers in proceedings and journals including IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, and more. (Email:yhzhu@zjut.edu.cn)
  • Received Date: 2019-08-11
  • Rev Recd Date: 2019-09-25
  • Publish Date: 2020-03-10
  • The IEEE 802.11ax amendment for the next generation of Wireless local area network (WLAN) provides the Orthogonal frequency division multiple access (OFDMA) mechanism. The Uplink OFDMAbased random access (UORA) supports multiple users to transmit uplink data simultaneously in different Resource units (RUs). With UORA, Access point (AP) uses trigger frame to dynamically announce eligible Random access RUs (RA-RUs) for the associated mobile stations (STAs), and a STA is allowed to select an RU to transmit when it picks an OFDMA-based random access backoff (OBO) counter no more than the number of the eligible RARUs. The UORA requires the STA with an unsuccessful transmission to double its OFDMA contention window (OCW) size for the followed retransmission, which causes the STA to endure a longer delay for retransmission(s). We propose the Retransmission number aware channel access (RNACA) scheme for IEEE 802.11ax-based WLAN. In the RNACA, a failed STA makes decision on whether to double its OCW size or not by using a probability that considers the number of retransmissions, number of RUs, and number of STAs. Simulation results show that the proposed RNACA can gain a higher throughput and a lower packet delay.
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