Adaptive multi-polling scheduler for QoS support of video transmission in IEEE 802.11e WLANs

Abstract

The 802.11E Task Group has been established to enhance Quality of Service (QoS) provision for time-bounded services in the current IEEE 802.11 Medium Access Control (MAC) protocol. The QoS is introduced throughout Hybrid Coordination Function Controlled Channel Access (HCCA) for the rigorous QoS provision. In HCCA, the station is allocated a fixed Transmission Opportunity (TXOP) based on its TSPEC parameters so that it is efficient for Constant Bit Rate streams. However, as the profile of Variable Bit Rate (VBR) traffics is inconstant, they are liable to experience a higher delay especially in bursty traffic case. In this paper, we present a dynamic TXOP assignment algorithm called Adaptive Multi-polling TXOP scheduling algorithm (AMTXOP) for supporting the video traffics transmission over IEEE 802.11e wireless networks. This scheme invests a piggybacked information about the size of the subsequent video frames of the uplink streams to assist the Hybrid Coordinator accurately assign the TXOP according to actual change in the traffic profile. The proposed scheduler is powered by integrating multi-polling scheme to further reduce the delay and polling overhead. Extensive simulation experiments have been carried out to show the efficiency of the AMTXOP over the existing schemes in terms of the packet delay and the channel utilization.

High performing multimedia transmission approach based on QoS support and admission control over IEEE 802.11e networks

“…A new scheme called adaptive multi‐polling TXOP (AMTXOP) has been proposed, which calculates the TXOP for a certain data stream based on the actual frame size. Since the polling messages can increase the overheard among all QSTAs, one multi‐polling message is broadcasted to all QSTAs in a single SI instead of sending one polling message for each.…”

Research on Polling Control System in Wireless Sensor Networks

“…Due to its unique conflict-free transmission mode, pollingbased MAC protocol has always been a hot topic in WSNs research [5,6]. With the development of research, its service mode has been continuously expanded [7][8][9]. Kunikawa and Yomo proposed a polling MAC protocol based on EH-WSN, which improves the throughput of WSNs nodes [10].…”

Performance Analysis and Prediction of Double‐Server Polling System Based on BP Neural Network

“…The polling access control mechanism is crucial in wireless sensor networks [1,2] . Research regarding polling systems by domestic and foreign scholars mainly focuses on the single server [3] . When handling massive data, a single server will exhibit some problems, such as excessive workload, long response time, and long average delay.…”