An Efficient Packet Scheduling Algorithm to Implement Throughput Differentiation for Wi-Fi Multimedia Devices

This paper discusses the packet scheduling algorithm for WLAN differentiated services. To support applications with quality of service requirements, such as video, audio, voice over IP and other multimedia applications in wireless networks, WMM adds prioritized QoS capabilities to Wi-Fi networks and optimizes their performance when multiple concurring applications, each with different latency and throughput requirements, compete for network resources. To realize such proportional throughput and latency differentiated services, this paper presents parameter-dependent priority scheduling algorithm, referred as Arbitrary Channel Reservation, for 802.11e networks. Experiments are carried out to illustrate the throughput performances for different access category under real traffic workloads.