With rising capacity demand in mobile networks, the infrastructure is also becoming increasingly denser and complex. This results in collection of larger amount of raw data(big data) that is generated at different lev...With rising capacity demand in mobile networks, the infrastructure is also becoming increasingly denser and complex. This results in collection of larger amount of raw data(big data) that is generated at different levels of network architecture and is typically underutilized. To unleash its full value, innovative machine learning algorithms need to be utilized in order to extract valuable insights which can be used for improving the overall network's performance. Additionally, a major challenge for network operators is to cope up with increasing number of complete(or partial) cell outages and to simultaneously reduce operational expenditure. This paper contributes towards the aforementioned problems by exploiting big data generated from the core network of 4 G LTE-A to detect network's anomalous behavior. We present a semi-supervised statistical-based anomaly detection technique to identify in time: first, unusually low user activity region depicting sleeping cell, which is a special case of cell outage; and second, unusually high user traffic area corresponding to a situation where special action such as additional resource allocation, fault avoidance solution etc. may be needed. Achieved results demonstrate that the proposed method can be used for timely and reliable anomaly detection in current and future cellular networks.展开更多
针对4G(the 4^(th)-Generation)移动通信智能终端设备在某些特定场合泄露敏感信息的隐患,提出一种基于4G同步信道的终端屏蔽方法。首先对同步信道屏蔽原理进行描述,然后对LTE(Long Term Evolution)系统结构和同步模型进行分析,最后在LT...针对4G(the 4^(th)-Generation)移动通信智能终端设备在某些特定场合泄露敏感信息的隐患,提出一种基于4G同步信道的终端屏蔽方法。首先对同步信道屏蔽原理进行描述,然后对LTE(Long Term Evolution)系统结构和同步模型进行分析,最后在LTE下行链路模型中对干扰性能进行仿真。仿真结果可以看出,干信比为-17 dB时,主同步信号漏检概率将达到99%,从而阻止终端完成小区搜索。展开更多
基金supported in part by the National Natural Science Foundation of China under the Grants No.61431011 and 61671371the National Science and Technology Major Project under Grant no.2016ZX03001016-005+1 种基金the Key Research and Development Program of Shaanxi Province under Grant No.2017ZDXM-G-Y-012the Fundamental Research Funds for the Central Universities
文摘With rising capacity demand in mobile networks, the infrastructure is also becoming increasingly denser and complex. This results in collection of larger amount of raw data(big data) that is generated at different levels of network architecture and is typically underutilized. To unleash its full value, innovative machine learning algorithms need to be utilized in order to extract valuable insights which can be used for improving the overall network's performance. Additionally, a major challenge for network operators is to cope up with increasing number of complete(or partial) cell outages and to simultaneously reduce operational expenditure. This paper contributes towards the aforementioned problems by exploiting big data generated from the core network of 4 G LTE-A to detect network's anomalous behavior. We present a semi-supervised statistical-based anomaly detection technique to identify in time: first, unusually low user activity region depicting sleeping cell, which is a special case of cell outage; and second, unusually high user traffic area corresponding to a situation where special action such as additional resource allocation, fault avoidance solution etc. may be needed. Achieved results demonstrate that the proposed method can be used for timely and reliable anomaly detection in current and future cellular networks.
文摘针对4G(the 4^(th)-Generation)移动通信智能终端设备在某些特定场合泄露敏感信息的隐患,提出一种基于4G同步信道的终端屏蔽方法。首先对同步信道屏蔽原理进行描述,然后对LTE(Long Term Evolution)系统结构和同步模型进行分析,最后在LTE下行链路模型中对干扰性能进行仿真。仿真结果可以看出,干信比为-17 dB时,主同步信号漏检概率将达到99%,从而阻止终端完成小区搜索。
