The framework complements other mechanisms introduced in 5G to protect users against false base stations, for example encrypted long-term identifiers and fresh short-term identifiers. This blog post outlines the framework and describes some practical experiments we have performed in our lab. Strategic Product Manager, RAN Security
You can try running the example on hardware. For more information, see the Introduction to 5G NR Signal Detection using AMD RFSoC (SoC Blockset) example or Introduction to 5G NR Signal Detection on NI USRP Radio (Wireless Testbench) example. 3GPP TS 38.211.
The setup, shown in Figure 3, uses base stations of two network generations, 2G base stations called BTS, and 4G base stations called eNB. The purpose is to verify that a 4G network can be used to detect both 4G and 2G false base stations. Figure 3: Simple experiments setup
The PSS in the received signal is detected using three correlators, one for each of the three possible PSS sequences defined by the 5G standard, TS 38.211 Section 7.4.2.2 . A strong correlation between the received signal and one of the expected PSS sequences indicates that a signal has been detected.
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