name: scf4
full_form: Scaling Factor 4
context: The IE RACH-ConfigGeneric is used to specify the random-access parameters both for regular random access as well as for beam failure recovery. RACH-ConfigGeneric information element -- ASN1START -- TAG-RACH-CONFIGGENERIC-START RACH-ConfigGeneric ::= SEQUENCE { prach-ConfigurationIndex INTEGER (0..255), msg1-FDM ENUMERATED {one, two, four, eight}, msg1-FrequencyStart INTEGER (0..maxNrofPhysicalResourceBlocks-1), zeroCorrelationZoneConfig INTEGER(0..15), preambleReceivedTargetPower INTEGER (-202..-60), preambleTransMax ENUMERATED {n3, n4, n5, n6, n7, n8, n10, n20, n50, n100, n200}, powerRampingStep ENUMERATED {dB0, dB2, dB4, dB6}, ra-ResponseWindow ENUMERATED {sl1, sl2, sl4, sl8, sl10, sl20, sl40, sl80}, ..., [[ prach-ConfigurationPeriodScaling-IAB-r16 ENUMERATED {scf1,scf2,scf4,scf8,scf16,scf32,scf64} OPTIONAL, -- Need R prach-ConfigurationFrameOffset-IAB-r16 INTEGER (0..63) OPTIONAL, -- Need R prach-ConfigurationSOffset-IAB-r16 INTEGER (0..39) OPTIONAL, -- Need R ra-ResponseWindow-v1610 ENUMERATED { sl60, sl160} OPTIONAL, -- Need R prach-ConfigurationIndex-v1610 INTEGER (256..262) OPTIONAL -- Need R ]], [[ ra-ResponseWindow-v1700 ENUMERATED {sl240, sl320, sl640, sl960, sl1280, sl1920, sl2560} OPTIONAL -- Need R ]] } -- TAG-RACH-CONFIGGENERIC-STOP -- ASN1STOP
description: Scaling Factor 4 (scf4) is a value used in the prach-ConfigurationPeriodScaling-IAB-r16 enumeration, which is part of the RACH-ConfigGeneric information element. This parameter is utilized to specify the scaling factor for the PRACH configuration period in the context of IAB (Integrated Access and Backhaul) for 5G New Radio (NR). The scaling factors are used to adjust the duration of the PRACH configuration period, which affects the random access procedure's performance and efficiency.
explanation: scf4 is classified as a Parameter because it represents a specific value within an enumeration that configures the behavior of the PRACH in relation to IAB. This parameter directly influences how the PRACH operates, making it a critical component in the RRC protocol specification for efficient random access and beam failure recovery procedures.
section_title: â RACH-ConfigGeneric
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