Enhancing UORA for IEEE802.11be

Currently, wireless networks have been tools commonly used in our daily lives. Users frequently connect multiple devices, especially IoT devices, to wireless networks to enjoy network services, no matter whether they are at home, in libraries, or in coffee shops. Also, different kinds of real-time applications which increase huge demands of high-speed transmission have been proposed. But, these applications pose challenges to the real-time transmission performance of wireless networks. To address these issues, IEEE 802.11be incorporates the Uplink OFDMA Random Access transmission method previously developed for by IEEE 802.11ax. However, when a large number of users need to transmit data, UORA suffers from long transmission delays and low transmission throughputs, which fail to meet the requirements of real-time applications. To fulfill the low-latency demands of real-time applications, this research proposes a transmission mechanism, named Priority-based OCW (POCW for short), to adjust the OCW range for IEEE802.11be stations based on priorities of data streams. This mechanism allows higher-priority STAs to transmit data before lower-priority STAs. Our simulations show that the POCW offers lower transmission delays for time-sensitive data streams and provides better throughputs in densely populated STA environments.