自3GPP R12版本開始，4G(LTE)網(wǎng)絡(luò)就開啟了Sidelink（[url]https://club.mscbsc.com/t707661p1.html[/url]）功能；為支持該功能4G網(wǎng)絡(luò)通過系統(tǒng)消息Sib18和Sib19進行傳遞，其具體內(nèi)容如下：
1.Sib18（Sidelink Information）--網(wǎng)絡(luò)側(cè)
SystemInformationBlockType18-r12 ::= SEQUENCE {
commConfig-r12 SEQUENCE {
commRxPool-r12 SL-CommRxPoolList-r12,
commTxPoolNormalCommon-r12 SL-CommTxPoolList-r12 OPTIONAL, -- Need OR
commTxPoolExceptional-r12 SL-CommTxPoolList-r12 OPTIONAL, -- Need OR
commSyncConfig-r12 SL-SyncConfigList-r12 OPTIONAL -- Need OR
} OPTIONAL, -- Need OR
lateNonCriticalExtension OCTET STRING OPTIONAL, ...,
[[ commTxPoolNormalCommonExt-r13 SL-CommTxPoolListExt-r13 OPTIONAL, -- Need OR
commTxResourceUC-ReqAllowed-r13 ENUMERATED {true} OPTIONAL, -- Need OR
commTxAllowRelayCommon-r13 ENUMERATED {true} OPTIONAL -- Need OR
]]}
2.SIB 19（sidelink UE information procedure and may contain sidelink discovery related resource configuration information）--終端側(cè)
SystemInformationBlockType19-r12 ::= SEQUENCE {
discConfig-r12 SEQUENCE {
discRxPool-r12 SL-DiscRxPoolList-r12,
discTxPoolCommon-r12 SL-DiscTxPoolList-r12 OPTIONAL, -- Need OR
discTxPowerInfo-r12 SL-DiscTxPowerInfoList-r12 OPTIONAL, -- Cond Tx
discSyncConfig-r12 SL-SyncConfigList-r12 OPTIONAL -- Need OR
} OPTIONAL, -- Need OR
discInterFreqList-r12 SL-CarrierFreqInfoList-r12 OPTIONAL, -- Need OR
lateNonCriticalExtension OCTET STRING OPTIONAL,...,
[[ discConfig-v1310 SEQUENCE {
discInterFreqList-v1310 SL-CarrierFreqInfoList-v1310 OPTIONAL, -- Need OR
gapRequestsAllowedCommon ENUMERATED {true} OPTIONAL -- Need OR
} OPTIONAL, -- Need OR
discConfigRelay-r13 SEQUENCE {
relayUE-Config-r13 SL-DiscConfigRelayUE-r13,
remoteUE-Config-r13 SL-DiscConfigRemoteUE-r13
} OPTIONAL, -- Need OR
discConfigPS-13 SEQUENCE {
discRxPoolPS-r13 SL-DiscRxPoolList-r12,
discTxPoolPS-Common-r13 SL-DiscTxPoolList-r12 OPTIONAL -- Need OR } OPTIONAL -- Need OR]] }
SL-CarrierFreqInfoList-r12 ::= SEQUENCE (SIZE (1..maxFreq)) OF SL-CarrierFreqInfo-r12
SL-CarrierFreqInfoList-v1310 ::= SEQUENCE (SIZE (1..maxFreq)) OF SL-CarrierFreqInfo-v1310
SL-CarrierFreqInfo-r12::= SEQUENCE {
carrierFreq-r12 ARFCN-ValueEUTRA-r9,
plmn-IdentityList-r12 PLMN-IdentityList4-r12 OPTIONAL -- Need OP}
SL-DiscConfigRelayUE-r13 ::= SEQUENCE {
threshHigh-r13 RSRP-RangeSL4-r13 OPTIONAL, -- Need OR
threshLow-r13 RSRP-RangeSL4-r13 OPTIONAL, -- Need OR
hystMax-r13 ENUMERATED {dB0, dB3, dB6, dB9, dB12, dBinf}
hystMin-r13 ENUMERATED {dB0, dB3, dB6, dB9, dB12}}
SL-DiscConfigRemoteUE-r13 ::= SEQUENCE {
threshHigh-r13 RSRP-RangeSL4-r13 OPTIONAL, -- Need OR
hystMax-r13 ENUMERATED {dB0, dB3, dB6, dB9, dB12} OPTIONAL,
reselectionInfoIC-r13 ReselectionInfoRelay-r13}
ReselectionInfoRelay-r13 ::= SEQUENCE {
q-RxLevMin-r13 Q-RxLevMin,
filterCoefficient-r13 FilterCoefficient,
minHyst-r13 ENUMERATED {dB0, dB3, dB6, dB9, dB12, dBinf}}
SL-CarrierFreqInfo-v1310::= SEQUENCE {
discResourcesNonPS-r13 SL-ResourcesInterFreq-r13 OPTIONAL,
discResourcesPS-r13 SL-ResourcesInterFreq-r13 OPTIONAL,
discConfigOther-r13 SL-DiscConfigOtherInterFreq-r13 OPTIONAL,...}
PLMN-IdentityList4-r12 ::= SEQUENCE (SIZE (1..maxPLMN-r11)) OF PLMN-IdentityInfo2-r12
PLMN-IdentityInfo2-r12 ::= CHOICE {
plmn-Index-r12 INTEGER (1..maxPLMN-r11),
plmnIdentity-r12 PLMN-Identity}
SL-DiscTxResourcesInterFreq-r13 ::= CHOICE {
acquireSI-FromCarrier-r13 NULL,
discTxPoolCommon-r13 SL-DiscTxPoolList-r12,
requestDedicated-r13 NULL,
noTxOnCarrier-r13 NULL }
SL-DiscConfigOtherInterFreq-r13::= SEQUENCE {
txPowerInfo-r13 SL-DiscTxPowerInfoList-r12 OPTIONAL, -- Cond Tx
refCarrierCommon-r13 ENUMERATED {pCell} OPTIONAL, -- Need OR
discSyncConfig-r13 SL-SyncConfigListNFreq-r13 OPTIONAL, -- Need OR
discCellSelectionInfo-r13 CellSelectionInfoNFreq-r13 OPTIONAL -- Need OR}
SL-ResourcesInterFreq-r13 ::= SEQUENCE {
discRxResourcesInterFreq-r13 SL-DiscRxPoolList-r12 OPTIONAL, -- Need OR
discTxResourcesInterFreq-r13 SL-DiscTxResourcesInterFreq-r13 OPTIONAL -- Need OR}
原文來自：[url]www.sharetechnote.com[/url]
整理：kangguoying20201205
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