自适应多轮询QoS协议在IEEE 802.11 e无线局域网中支持视频传输
Adaptive Multi-polling Scheduler for QoS Support of Video Transmission in IEEE 802.11e WLANs
摘要：
802.11 E任务组已经建立，以增强当前IEEE 802.11媒体访问控制（MAC）协议中的时间受限服务的服务质量（QoS）供应。在整个混合协调功能控制信道接入（HCCA）中引入了QoS，以提供严格的QoS。在HCCA中，基于其TSPEC参数为站分配固定的传输机会（TXOP），使得其对于恒定比特率流是有效的。然而，由于可变比特率（VBR）业务的轮廓是不恒定的，他们很容易经历一个较高的延迟，特别是在突发业务的情况下。在本文中，我们提出了一个动态的TXOP分配算法称为自适应多轮询TXOP调度算法（AMTXOP），以支持视频业务在IEEE 802.11e无线网络传输。该方案投资了关于上行链路流的后续视频帧的大小的捎带信息，以帮助混合协调器根据业务简档中的实际变化准确地分配TXOP。建议的调度器是由集成多轮询方案，以进一步减少延迟和轮询开销。大量的仿真实验表明，AMTXOP在分组延迟和信道利用率方面优于现有方案。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
