False Base Station (FBS) attack has been a severe security problem for the cellular network since 2G era. During handover, the user equipment (UE) periodically receives state information from surrounding base stations (BSs) and uploads it to the source BS. The source BS compares the uploaded signal power and shifts UE to another BS that can provide the strongest signal. An FBS can transmit signal with the proper power and attract UE to connect to it. In this paper, based on the 3GPP standard, a Precheck Sequence-based Detection (PSD) Scheme is proposed to secure the transition of legal base station (LBS) for UE. This scheme first analyzes the structure of received signals in blocks and symbols. Several additional symbols are added to the current signal sequence for verification. By designing a long table of symbol sequence, every UE which needs handover will be allocated a specific sequence from this table. The simulation results show that the performance of this PSD Scheme is better than that of any existing ones, even when a specific transmit power is designed for FBS.

翻译：虚假基站攻击自2G时代以来一直是蜂窝网络的严重安全问题。在切换过程中，用户设备定期从周围基站接收状态信息并上传至源基站。源基站通过比较上传信号功率，将用户设备切换至能提供最强信号的基站。虚假基站可通过发送适当功率的信号吸引用户设备连接。本文基于3GPP标准，提出了一种预检序列检测方案，用于保障用户设备切换至合法基站的安全性。该方案首先以块和符号为单位分析接收信号的结构，在现有信号序列中添加若干额外符号进行验证。通过设计长符号序列表，每个需要切换的用户设备将从该表中分配特定序列。仿真结果表明，即使虚假基站设计特定发射功率，该预检序列方案的性能也优于现有方案。