An Efficient Method to Monitor Downlink Traffic for 4G and 5G Networks

T. Ban, Alankrita Bhatt, Young-Han Kim
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Abstract

This paper proposes a new scheme that allows the measurement of traffic loads of radio networks by decoding some information about the cell, such as downlink control information (DCI) broadcast on the physical downlink control channel (PDCCH). In the proposed scheme, a client decodes the entire DCI for all user equipments (UEs) with ongoing connections in a cell and extracts some information about the cell, such as the number of active UEs, the number of radio resources occupied, as well as the modulation and coding scheme used by each UE. Based on this information, mobile network carriers can measure exact traffic loads of cells preemptively without affecting ongoing connections. Contrary to an exhaustive searching scheme that attempts to decode DCI with all radio network temporary identifiers (RNTIs), the proposed scheme derives a small set of valid RNTIs by using an inverse function and attempts to decode DCI only with the valid RNTIs instead of the entire set of RNTIs. This reduction enables the client to recover the correct DCI with marginal computational complexity, which allows for real-time decoding of DCI. The simulation results show that the proposed scheme can significantly reduce the complexity required to decode the entire DCI in a cell, compared to the exhaustive searching scheme.
一种监控4G和5G网络下行流量的有效方法
本文提出了一种新的方案,该方案通过对在物理下行控制信道(PDCCH)上广播的下行控制信息(DCI)进行解码来测量无线网络的业务负载。在提出的方案中,客户端对一个小区中所有具有持续连接的用户设备(UE)的整个DCI进行解码,并提取有关小区的一些信息,例如活动UE的数量、占用的无线电资源数量以及每个UE使用的调制和编码方案。基于这些信息,移动网络运营商可以在不影响正在进行的连接的情况下,先发制人地准确测量小区的流量负载。与尝试使用所有无线网络临时标识符(rnti)解码DCI的穷举搜索方案相反,该方案通过使用反函数派生出一小部分有效的rnti,并尝试仅使用有效的rnti而不是整个rnti集解码DCI。这种减少使客户端能够恢复具有边际计算复杂性的正确DCI,从而允许对DCI进行实时解码。仿真结果表明,与穷举搜索方案相比,该方案可显著降低解码单元内整个DCI的复杂度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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