A Channel-Stealing Full-Duplex MAC Protocol for Asymmetric Traffic in IEEE 802.11 WLANs

• Main Authors: Jie-Min Cao, 曹傑閔
• Other Authors: Kuei-Ping Shih
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/fy989k

碩士 === 淡江大學 === 資訊工程學系碩士班 === 106 === This paper proposes an effective solution to the performance degradation caused by asymmetric transmission in In-Band Full-Duplex Wireless LANs (IBFD WLANs). Along with antenna design and signal processing advancements, users can simultaneously send and receive data through the same channel, which is called IBFD transmission. However, advancements in the physical layer, efficient IBFD Medium Access Control(MAC) protocol is required to achieve optimum benefit from this latest technology. Moreover, since transmission traffic of uplink and downlink is usually different, so IBFD transmission is easy to generate waste of channel idleness. Therefore, in this paper, a Channel-Stealing Full Duplex (CSFD) MAC is proposed to solve the asymmetric transmission problem in the uplink-downlink transmission. The main feature of CSFD is increasing transmission opportunities by stealing channel idle time due to asymmetric trans-mission to improve the performance of the asymmetric transmission. CSFD compares with the related research (A-duplex) by OMNET++ simulator. The simulation results suggest that the throughput and transmission delay of CSFD outperforms traditional half-duplex and A-Duplex in different asymmetric transmission scenarios, which can be used for future FD WLANs.