通过MIB和SIB查找频点参数ssb_offset、 offsetToPointA、UL_arfcn

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我是靠谱客的博主高兴酸奶，最近开发中收集的这篇文章主要介绍通过MIB和SIB查找频点参数ssb_offset、 offsetToPointA、UL_arfcn，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

概念简述

MIB:master information block(主系统信息块）
SIB:system information block(系统信息块)
在广播消息中，系统信息是小区级别的信息，对接入该小区的UE有效。系统信息可分为MIB （ MasterInformationBlock）和多个 SIB （SystemInformationBlock），每个系统信息包含了与某方面功能相关的树形结构参数集合。
下面以NR—5G举例找到对应DL arfcn:156490 频点的ssb_offset、 offsetToPointA、UL_arfcn参数所在位置。

一、 BCCH-BCH-Message ：MIB中

ssb-SubcarrierOffset : 6

二、BCCH-DL-SCH-Message的 SIB1 中

offsetToPointA : 122
absoluteFrequencyPointA : 140720 （UL Arfcn）

三、举例消息内容

3.1 MIB

##############################################################
09:32:20.665 NR5G Master Information Block
pkt version : 9
rrc release : 15.9.0
pci : 99
freq : 427010

BCCH-BCH-Message
message : MIB
systemFrameNumber : E0 (2 bits unused)
subCarrierSpacingCommon : 0 (scs15or60)
ssb-SubcarrierOffset : 6
dmrs-TypeA-Position : 1 (pos3)
pdcch-ConfigSIB1 : PDCCH-ConfigSIB1
controlResourceSetZero : 8
searchSpaceZero : 0
cellBarred : 1 (notBarred)
intraFreqReselection : 0 (allowed)
spare : 00 (7 bits unused)

3.1 SIB1

##############################################################
09:31:40.968 NR5G System Information Block Type1
pkt version : 9
rrc release : 15.9.0
pci : 591
freq : 156490

BCCH-DL-SCH-Message
message : SIB1
cellSelectionInfo : cellSelectionInfo
q-RxLevMin : -60
q-QualMin : -19
cellAccessRelatedInfo : CellAccessRelatedInfo
plmn-IdentityList : PLMN-IdentityInfoList ::= {
PLMN-IdentityInfo
plmn-IdentityList : plmn-IdentityList ::= {
PLMN-Identity
mcc : MCC ::= {
4
6
0
}
mnc : MNC ::= {
0
0
}
}
trackingAreaCode : 72 00 2C(7471148)
ranac : 0
cellIdentity : 24 A6 6E 00 00(2401902 /0 ) (4 bits unused)
cellReservedForOperatorUse : 1 (notReserved)
PLMN-IdentityInfo
plmn-IdentityList : plmn-IdentityList ::= {
PLMN-Identity
mcc : MCC ::= {
4
6
0
}
mnc : MNC ::= {
1
5
}
}
trackingAreaCode : 72 00 2C(7471148)
ranac : 0
cellIdentity : 24 A6 6E 06 40(2401902 /100 ) (4 bits unused)
cellReservedForOperatorUse : 1 (notReserved)
}
connEstFailureControl : ConnEstFailureControl
connEstFailCount : 1 (n2)
connEstFailOffsetValidity : 0 (s30)
connEstFailOffset : 2
si-SchedulingInfo : SI-SchedulingInfo
schedulingInfoList : schedulingInfoList ::= {
SchedulingInfo
si-BroadcastStatus : 0 (broadcasting)
si-Periodicity : 3 (rf64)
sib-MappingInfo : SIB-Mapping ::= {
SIB-TypeInfo
type : 0 (sibType2)
valueTag : 3
SIB-TypeInfo
type : 1 (sibType3)
valueTag : 0
SIB-TypeInfo
type : 2 (sibType4)
valueTag : 24
SIB-TypeInfo
type : 3 (sibType5)
valueTag : 15
}
}
si-WindowLength : 4 (s80)
servingCellConfigCommon : ServingCellConfigCommonSIB
downlinkConfigCommon : DownlinkConfigCommonSIB
frequencyInfoDL : FrequencyInfoDL-SIB
frequencyBandList : MultiFrequencyBandListNR-SIB ::= {
NR-MultiBandInfo
freqBandIndicatorNR : 28
}
offsetToPointA : 122
scs-SpecificCarrierList : scs-SpecificCarrierList ::= {
SCS-SpecificCarrier
offsetToCarrier : 0
subcarrierSpacing : 0 (kHz15)
carrierBandwidth : 160
}
initialDownlinkBWP : BWP-DownlinkCommon
genericParameters : BWP
locationAndBandwidth : 13035
subcarrierSpacing : 0 (kHz15)
pdcch-ConfigCommon : PDCCH-ConfigCommon
controlResourceSetZero : 8
commonSearchSpaceList : commonSearchSpaceList ::= {
SearchSpace
searchSpaceId : 1
controlResourceSetId : 0
monitoringSlotPeriodicityAndOffset :
monitoringSymbolsWithinSlot : 80 00 (2 bits unused)
nrofCandidates : nrofCandidates
aggregationLevel1 : 0 (n0)
aggregationLevel2 : 0 (n0)
aggregationLevel4 : 4 (n4)
aggregationLevel8 : 2 (n2)
aggregationLevel16 : 1 (n1)
searchSpaceType : common
dci-Format0-0-AndFormat1-0 : dci-Format0-0-AndFormat1-0
}
searchSpaceSIB1 : 0
searchSpaceOtherSystemInformation : 0
pagingSearchSpace : 0
ra-SearchSpace : 1
pdsch-ConfigCommon : PDSCH-ConfigCommon
pdsch-TimeDomainAllocationList : PDSCH-TimeDomainResourceAllocationList ::= {
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 66
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 53
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 40
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 94
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 67
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 81
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 80
PDSCH-TimeDomainResourceAllocation
mappingType : 0 (typeA)
startSymbolAndLength : 54
}
bcch-Config : BCCH-Config
modificationPeriodCoeff : 1 (n4)
pcch-Config : PCCH-Config
defaultPagingCycle : 0 (rf32)
nAndPagingFrameOffset : 2
ns : 2 (one)
uplinkConfigCommon : UplinkConfigCommonSIB
frequencyInfoUL : FrequencyInfoUL-SIB
frequencyBandList : MultiFrequencyBandListNR-SIB ::= {
NR-MultiBandInfo
freqBandIndicatorNR : 28
}
absoluteFrequencyPointA : 140720
scs-SpecificCarrierList : scs-SpecificCarrierList ::= {
SCS-SpecificCarrier
offsetToCarrier : 0
subcarrierSpacing : 0 (kHz15)
carrierBandwidth : 160
}
p-Max : 26
initialUplinkBWP : BWP-UplinkCommon
genericParameters : BWP
locationAndBandwidth : 28929
subcarrierSpacing : 0 (kHz15)
rach-ConfigCommon : RACH-ConfigCommon
rach-ConfigGeneric : RACH-ConfigGeneric
prach-ConfigurationIndex : 16
msg1-FDM : 0 (one)
msg1-FrequencyStart : 94
zeroCorrelationZoneConfig : 10
preambleReceivedTargetPower : -100
preambleTransMax : 5 (n8)
powerRampingStep : 1 (dB2)
ra-ResponseWindow : 4 (sl10)
totalNumberOfRA-Preambles : 44
ssb-perRACH-OccasionAndCB-PreamblesPerSSB : 7 (n32)
groupBconfigured : groupBconfigured
ra-Msg3SizeGroupA : 5 (b480)
messagePowerOffsetGroupB : 3 (dB8)
numberOfRA-PreamblesGroupA : 28
ra-ContentionResolutionTimer : 7 (sf64)
prach-RootSequenceIndex : 33
restrictedSetConfig : 0 (unrestrictedSet)
msg3-transformPrecoder : 0 (enabled)
pusch-ConfigCommon : PUSCH-ConfigCommon
pusch-TimeDomainAllocationList : PUSCH-TimeDomainResourceAllocationList ::= {
PUSCH-TimeDomainResourceAllocation
k2 : 4
mappingType : 0 (typeA)
startSymbolAndLength : 41
PUSCH-TimeDomainResourceAllocation
k2 : 2
mappingType : 0 (typeA)
startSymbolAndLength : 41
PUSCH-TimeDomainResourceAllocation
k2 : 4
mappingType : 0 (typeA)
startSymbolAndLength : 27
PUSCH-TimeDomainResourceAllocation
k2 : 2
mappingType : 0 (typeA)
startSymbolAndLength : 27
}
msg3-DeltaPreamble : 0
p0-NominalWithGrant : -76
pucch-ConfigCommon : PUCCH-ConfigCommon
pucch-ResourceCommon : 12
pucch-GroupHopping : 0 (neither)
hoppingId : 591
p0-nominal : -104
timeAlignmentTimerCommon : 7 (infinity)
n-TimingAdvanceOffset : 1 (n25600)
ssb-PositionsInBurst : ssb-PositionsInBurst
inOneGroup : 10
ssb-PeriodicityServingCell : 2 (ms20)
ss-PBCH-BlockPower : 19
ue-TimersAndConstants : UE-TimersAndConstants
t300 : 7 (ms2000)
t301 : 4 (ms600)
t310 : 6 (ms2000)
n310 : 4 (n6)
t311 : 0 (ms1000)
n311 : 0 (n1)
t319 : 7 (ms2000)