Cross: A Delay Based Congestion Control Method for RTP Media

arXiv - CS - Networking and Internet Architecture Pub Date : 2024-09-16 DOI:arxiv-2409.10042

Songyang Zhang, Changpeng Yang

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Abstract

After more than a decade of development, real time communication (RTC) for video telephony has made significantly progress. However, emerging high-quality RTC applications with high definition and high frame rate requires sufficient bandwidth. The default congestion control mechanism specifically tuned for video telephony leaves plenty of room for optimization under high-rate scenarios. It is necessary to develop new rate control solutions to utilize bandwidth efficiently and to provide better experience for such services. A delay-based congestion control method called Cross is proposed, which regulates rate based on queue load with a multiplicative increase and multiplicative decrease fashion. A simulation module is developed to validate the effectiveness of these congestion control algorithms for RTC services. The module is released with the hope to provide convenience for RTC research community. Simulation results demonstrate that Cross can achieve low queuing delay and maintain high channel utilization under random loss environments. Online deployment shows that Cross can reduce the video freezing ratio by up to 58.45\% on average when compared with a benchmark algorithm.

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交叉基于延迟的 RTP 媒体拥塞控制方法

经过十多年的发展，用于视频电话的实时通信（RTC）取得了长足的进步。然而，新出现的高清晰度和高帧速率的高质量 RTC 应用需要足够的带宽。专为视频电话调整的默认拥塞控制机制在高速率情况下还有很大的优化空间。有必要开发新的速率控制解决方案，以有效利用带宽，为此类服务提供更好的体验。本文提出了一种名为 Cross 的基于延迟的拥塞控制方法，该方法根据队列负载以乘法增加和乘法减少的方式调节速率。为验证这些拥塞控制算法对 RTC 服务的有效性，开发了一个仿真模块。该模块的发布希望能为 RTC 研究界提供便利。仿真结果表明，在随机损耗环境下，Cross可以实现较低的队列延迟并保持较高的信道利用率。在线部署结果表明，与基准算法相比，Cross可以将视频冻结率平均降低58.45%。

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arXiv - CS - Networking and Internet Architecture

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