name: SI
full_form: System Information
context: This measurement provides the usage (in percentage) of physical resource blocks (PRBs) on the uplink for DTCH traffic. The measurement is split into subcounters per E-RAB QoS level (QCI). If there is one or more RNs served in a cell, for that cell the eNodeB performs PRB usage measurements separately for all traffic (including transmissions to/from RNs and UEs directly connected to the eNodeB) and for RN traffic. The measurement is also applicable to RNs. SI This measurement is obtained according to the definition in 3GPP TS 36.314[ Evolved Universal Terrestrial Radio Access  (E-UTRA); Layer 2 - Measurements ]  [11]. Separate counters are maintained for each QCI. The sum of all supported per QCI measurements shall equal the total PRB usage for DTCH. In case only a subset of per QCI measurements is supported, a sum subcounter will be provided first. Each measurement is an integer value from 0 to 100. The number of measurements is equal to the number of QCIs plus a possible sum value identified by the .sum suffix. The measurement name has the form RRU.PrbUl.QCI, which indicats the UL PRB Usage for all traffic RRU.PrbUlRN.QCI, which indicates the UL PRB Usage for the RN traffic where QCI identifies the E-RAB level quality of service class. EUtranCellFDD EUtranCellTDD Valid for packet switched traffic EPS
description: System Information (SI) refers to a set of measurements and parameters that provide insights into the performance and configuration of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). In this context, SI specifically relates to the measurement of physical resource block (PRB) usage on the uplink for DTCH traffic, split into subcounters per E-RAB QoS level (QCI), and applicable to both eNodeBs and RNs. These measurements are crucial for assessing network performance, optimizing resource allocation, and ensuring Quality of Service (QoS).
explanation: SI is classified as a Measurement because it involves the collection and reporting of specific data points related to PRB usage in E-UTRAN, which aligns with the definition provided in 3GPP TS 36.314. The measurements are used to evaluate network performance and optimize resource allocation, making them an essential part of telecommunication management.
section_title: 4.5.2 UL PRB Usage for traffic
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