LoLa is a novel multi-path system for video conferencing applications over cellular networks. It provides significant gains over single link solutions when the link quality over different cellular networks fluctuate dramatically and independently over time, or when aggregating the throughput across different cellular links improves the perceived video quality. LoLa achieves this by continuously estimating the quality of available cellular links to decide how to strip video packets across them without inducing delays or packet drops. It is also tightly coupled with state-of-the-art video codec to dynamically adapt video frame size to respond quickly to changing network conditions. Using multiple traces collected over 4 different cellular operators in a large metropolitan city, we demonstrate that LoLa provides significant gains in terms of throughput and delays compared to state-of-the-art real-time video conferencing solution.

翻译：LoLa是一种面向蜂窝网络视频会议应用的新型多路径系统。当不同蜂窝网络的链路质量随时间剧烈且独立波动时，或当聚合不同蜂窝链路的吞吐量能提升感知视频质量时，该系统相比单链路解决方案具有显著优势。LoLa通过持续估计可用蜂窝链路的质量，决定如何在各链路上分配视频数据包，同时避免引入延迟或丢包。该系统还与先进视频编解码器紧密耦合，动态调整视频帧大小以快速响应变化的网络条件。基于在大都市区域收集的4家不同蜂窝运营商的多个追踪数据，我们证明与当前最先进的实时视频会议解决方案相比，LoLa在吞吐量和延迟方面具有显著提升。