A Dynamic Priority Adjustment Scheme for the Next Generation WLAN Supporting Delay Sensitive Services

With the rapid development of wireless communications, Wireless Local Area Network (WLAN) has entered thousands of households and has become one of the most important ways of carrying data business. In recent years, delay sensitive applications and services such as real-time game and wireless meeting have been increasing sharply. These applications and services require low latency. However, the traditional WLAN can hardly satisfy the needs of this requirement. The next generation WLAN standard: IEEE 802.11be which was established in 2019 regards low latency as one important technical objective. In this paper, we propose a delay sensitive priority adjustment scheme for the next generation WLAN to improve the latency performance of delay sensitive services. In the Media Access Control (MAC) layer, if there is still some time left before deadline, the priority of delay sensitive packets will be normal. Conversely, as the deadline approaches, the priority of delay sensitive packets will be upgraded. The priority related mechanisms in MAC layer include queuing policy, channel access parameters, and Modulation and Coding Scheme (MCS) selection.