name: RSSI
full_form: Received Signal Strength Indicator
context: TS 25.215 [15] describes the measurements on the physical layer for the FDD mode. The scope is to establish the characteristics of the physical layer measurements in the FDD mode, and to specify: - the measurements that Layer 1 is to perform; - reporting of measurements to higher layers and network; - handover measurements, idle-mode measurements etc. Chapter 5.1 describes the measurement abilities for the UE. Among them we have the GSM carrier RSSI which is defined as: "Received Signal Strength Indicator, the wide-band received power within the relevant channel bandwidth. Measurement shall be performed on a GSM BCCH carrier. The reference point for the RSSI is the antenna connector at the UE" UTRAN carrier RSSI is also described in a similar way to the GSM carrier RSSI, as the specification is made for the UTRAN. The compressed mode, making it possible for the UE camping or in active communication in UMTS to make measurements in other radio access modes/technologies, is described in
description: Received Signal Strength Indicator (RSSI) is a measurement of the wide-band received power within the relevant channel bandwidth. It is used to assess the signal strength of a GSM or UTRAN carrier at the antenna connector of the User Equipment (UE).
explanation: The context explicitly mentions RSSI as a measurement performed by Layer 1, specifically for evaluating the signal strength of GSM and UTRAN carriers. This aligns with the definition of Measurement in the predefined categories.
section_title: 4.2.1.2	Physical layer â Measurements (FDD)
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