name: MR
full_form: Measurement Report
context: Usually, the 5G RAN HO decision is based on the UE MR (Measurement Report).The UE executes the signal power measurement of the neighbour cell based on the SS Block which carries the broadcasted synchronization signal and MIB signal which is sent without security protection [1] and [2]. Assuming there is a false base station C counterfeiting the system information of a legitimate base station B. The serving base station A receives the UE MR which include measurements from C. Base station A would assume the included information in the UE MR belongs to base station B and then may decide to handover the UE to B and consequently the UE instead connects to the false base station C. Eventually, the handover will fail, as shown in figure 6.6.2.1-1. Figure 6.6.2.1-1: HO procedure caused by false base station C Step 0: The UE reports the measurement report (MR) to the source gNB (A). Step 1: The source gNB (A) decides the measurement from false gNB C meets the HO trigger threshold, then the
description: The Measurement Report (MR) is a signaling message sent by the User Equipment (UE) to the serving base station, containing measurements of signal power from neighboring cells. This information is used for handover decisions in the 5G RAN.
explanation: The text states that the UE 'sends' the Measurement Report (MR) to the serving base station, indicating a transfer of information between entities, which is characteristic of a message.
section_title: 6.6.2.1	Background
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