Abstract
In an enterprise network, it is common to have hundreds of video conferences held simultaneously such that a large number of video streams need to be transmitted between participants in different geographical locations. For such a large transmission demand, an advance reservation (AR) system deployed for the video conferencing system can provide quality-of-service (QoS) guarantees to users and improve the resource utilization of the network. However, the effective resource reservation strategies for a heavy traffic case still remains open. In this paper, we propose an algorithm called the elastic timeslot-based advance reservation algorithm (ETARA), which aims at improving the resource utilization and reducing the computational complexity. A new time processing method, elastic timeslot, is proposed for the time domain management. Moreover, ETARA takes not only the processing time but also the resource usage into account. Comparative simulations with the existing two popular approaches, the dynamic timeslot-based approach and timeslot-based flexible approach, have been performed in terms of the acceptance ratio and runtime. The results show that with the same acceptance ratio, the runtime of ETARA can be up to 57 times lower than that of the flexible timeslot-based approach. Though ETARA has a slightly longer runtime than the dynamic approach, the acceptance ratio of ETARA can be twice as high as that of the dynamic timeslot-based approach.
Highlights
With the enhancement of video terminal capabilities and rapid network development, video conferencing systems, such as Cisco TelePresence, iChat, and Skype, have become mainstream on the Internet
Motivated by the above views, in this paper, we propose an improved advance reservation algorithm, the elastic timeslotbased advance reservation algorithm (ETARA), which aims at improving the resource utilization and reducing the VOLUME 8, 2020 computational complexity so that it is suitable for a heavy network load
We investigated mechanisms to guarantee QoS for video conferencing system (VCS) based on the resource reservation protocol (RSVP) and network management protocols such as SNMP, network configuration protocol (NetConf) and Telnet [6]
Summary
With the enhancement of video terminal capabilities and rapid network development, video conferencing systems, such as Cisco TelePresence, iChat, and Skype, have become mainstream on the Internet. By deploying an AR system, networks can reserve bandwidth for a video conference in advance for a future time to guarantee specific QoS features. We further analyze the performance of the static, dynamic and flexible timeslot-based approaches in terms of resource utilization and computational complexity. Motivated by the above views, in this paper, we propose an improved advance reservation algorithm, the elastic timeslotbased advance reservation algorithm (ETARA), which aims at improving the resource utilization and reducing the VOLUME 8, 2020 computational complexity so that it is suitable for a heavy network load. It is worth noting that all the above works on advance reservation use the existing approaches to manage the time domain, which is different from our proposed algorithm. AR-ENABLED NETWORK ARCHITECTURE In this paper, we extend the video conference system in [7] by adding the advance reservation system of task scheduling and resource reservation. Step 7: the endpoints acquire the activated conference and join the conference; the participants can exchange the video data with each other via the paths assigned earlier
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