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arXiv 2201.07043cs.NIcs.MMeess.IV
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XR流量的时间特性及其在预测网络切片中的应用

Temporal Characterization of XR Traffic with Application to Predictive Network Slicing

Mattia Lecci, Federico Chiariotti, Matteo Drago, Andrea Zanella, Michele Zorzi

摘要:

在过去的几年里,由于其广泛的工业和商业应用,延展实境(XR)吸引了越来越多的兴趣,预计其受欢迎程度将在未来十年呈指数级增长。然而,XR的交互性质所施加的严格的服务质量(QoS)约束要求网络切片(NS)解决方案支持其在无线连接上的使用:在这种情况下,准恒定比特率(CBR)编码是一种有前途的解决方案,因为它可以增加流的可预测性,使网络资源分配更容易。然而,XR流的流量特征仍然是一个很大程度上未探索的主题,特别是这种编码。在这项工作中,我们从实际设置中捕获的超过4个小时的踪迹中表征XR流,分析它们的时间相关性,并提出两个预测未来帧大小的模型。我们的研究结果表明,即使是最先进的H.264 CBR模式也会有显着的帧大小波动,这会影响NS优化。我们提出的预测模型可以应用于不同的轨迹,甚至不同的内容,实现非常相似的性能。我们还展示了网络资源效率和XR QoS之间的权衡在一个简单的NS用例。

英文摘要:

Over the past few years, eXtended Reality (XR) has attracted increasing interest thanks to its extensive industrial and commercial applications, and its popularity is expected to rise exponentially over the next decade. However, the stringent Quality of Service (QoS) constraints imposed by XR's interactive nature require Network Slicing (NS) solutions to support its use over wireless connections: in this context, quasi-Constant Bit Rate (CBR) encoding is a promising solution, as it can increase the predictability of the stream, making the network resource allocation easier. However, traffic characterization of XR streams is still a largely unexplored subject, particularly with this encoding. In this work, we characterize XR streams from more than 4 hours of traces captured in a real setup, analyzing their temporal correlation and proposing two prediction models for future frame size. Our results show that even the state-of-the-art H.264 CBR mode can have significant frame size fluctuations, which can impact the NS optimization. Our proposed prediction models can be applied to different traces, and even to different contents, achieving very similar performance. We also show the trade-off between network resource efficiency and XR QoS in a simple NS use case.

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。

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