LDRP: Device-Centric Latency Diagnostic and Reduction for Cellular Networks Without Root
LDRP: Device-Centric Latency Diagnostic and Reduction for Cellular Networks Without Root
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DOI：
10.1109/tmc.2023.3267805
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发表时间：
2024-04
影响因子：
7.9
通讯作者：
Zhaowei Tan;Jinghao Zhao;Yuanjie Li;Yifei Xu;Yunqi Guo;Songwu Lu
中科院分区：
文献类型：
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作者：
Zhaowei Tan;Jinghao Zhao;Yuanjie Li;Yifei Xu;Yunqi Guo;Songwu Lu
我们设计并实现了LDRP，这是一个基于设备的、符合标准的解决方案，用于在没有超级用户权限的移动网络中进行延迟诊断和减少延迟。LDRP采用数据驱动的方法，可与各种延迟敏感型应用程序配合使用。在识别了LTE上行时延的影响因素后，设计了LDRP来推断数据传输中的关键参数，并对其进行诊断。此外，LDRP指定在上行链路数据传输之前的小的伪消息，从而消除了由于节能、调度等造成的延迟元素。它在伪消息和数据分组之间施加适当的时序控制以处理各种冲突。我们无需超级用户权限即可实现延迟诊断和减少，并确保延迟不会比传统的LTE设计更差。LDRP的设计也适用于5G。评估表明，对于4个移动运营商上的4个应用，LDRP推断时延的误差最大为4%，并将LTE上行时延的中位数降低了7.4倍(从42到5ms)。
We design and implement LDRP, a device-based, standard-compliant solution to latency diagnosis and reduction in mobile networks without root privilege. LDRP takes a data-driven approach and works with a variety of latency-sensitive applications. After identifying elements in LTE uplink latency, we design LDRP that can infer the critical parameter used in data transmission and infer them for diagnosis. In addition, LDRP designates small dummy messages, which precede uplink data transmissions, thus eliminating latency elements due to power-saving, scheduling, etc. It imposes proper timing control among dummy messages and data packets to handle various conflicts. We achieve the latency diagnosis and reduction without requiring root privilege and ensure the latency is no worse than the legacy LTE design. The design of LDRP is also applicable for 5G. The evaluation shows that, LDRP infers the latency with at most 4% error and reduces the median LTE uplink latency by a factor up to 7.4× (from 42 to 5 ms) for four apps over 4 mobile carriers.