Content for TS 38.331 Word version: 18.0.0

1… 4… 5… 5.2.2.4… 5.3… 5.3.3… 5.3.5… 5.3.5.5… 5.3.5.6… 5.3.5.7… 5.3.5.13… 5.3.5.17… 5.3.6… 5.3.8… 5.3.13… 5.3.14… 5.4… 5.5… 5.5.3… 5.5.4… 5.5.4.15… 5.5.4.23… 5.5.5… 5.5a… 5.7… 5.7.4… 5.7.8… 5.7.12… 5.8… 5.8.9… 5.8.9.2… 5.8.9.8… 5.8.10… 5.8.11… 5.9… 5.10… 6… 6.2.2… 6-2-2-23… 6-2-2-27… 6-2-2-43… 6-2-2-47… 6.3… 6.3.2… 6-3-2-27… 6-3-2-49… 6-3-2-73… 6-3-2-95… 6-3-2-108… 6-3-2-134… 6-3-2-162… 6-3-2-188… 6-3-2-213… 6-3-2-243… 6-3-2-271… 6-3-2-297… 6-3-2-341… 6.3.3… 6-3-3-25… 6-3-3-51… 6.3.4… 6.3.5… 6-3-5-25… 6.3.6… 6.4… 7… 9… 11… A… A.4… B…

6.3.6 MBS information elements — CarrierFreqListMBS — CFR-ConfigMCCH-MTCH — DRX-ConfigPTM — MBS-NeighbourCellList — MBS-NonServingInfoList — MBS-ServiceList — MBS-SessionInfoList — MBS-SessionInfoListMulticast — MTCH-SSB-MappingWindowList — PDSCH-ConfigBroadcast — TMGI
...

6.3.6 MBS information elements p. 1398

– CarrierFreqListMBS p. 1398

The IE CarrierFreqListMBS is used to inform network of the frequencies on which the UE is receiving or interested to receive MBS broadcast service via a broadcast MRB.

CarrierFreqListMBS information element

-- ASN1START
-- TAG-CARRIERFREQLISTMBS-START
CarrierFreqListMBS-r17 ::= SEQUENCE
 (SIZE (1..maxFreqMBS-r17)) OF ARFCN-ValueNR
-- TAG-CARRIERFREQLISTMBS-STOP
-- ASN1STOP

– CFR-ConfigMCCH-MTCH p. 1399

The IE CFR-ConfigMCCH-MTCH is used to configure the common frequency resource used for MCCH and MTCH reception.

CFR-ConfigMCCH-MTCH information element

-- ASN1START
-- TAG-CFR-CONFIGMCCH-MTCH-START
CFR-ConfigMCCH-MTCH-r17 ::= SEQUENCE {
 locationAndBandwidthBroadcast-r17
  LocationAndBandwidthBroadcast-r17 OPTIONAL, -- Need S
 pdsch-ConfigMCCH-r17
  PDSCH-ConfigBroadcast-r17 OPTIONAL, -- Need S
 commonControlResourceSetExt-r17
  ControlResourceSet OPTIONAL -- Cond NotSIB1CommonControlResource
}
LocationAndBandwidthBroadcast-r17 ::= CHOICE {
 sameAsSib1ConfiguredLocationAndBW NULL,
 locationAndBandwidth INTEGER (0..37949)
}
-- TAG-CFR-CONFIGMCCH-MTCH-STOP
-- ASN1STOP

CFR-ConfigMCCH-MTCH field descriptions
commonControlResourceSetExt An additional common control resource set which may be configured and used for searchSpaceMCCH/searchSpaceMTCH or UE-specific search space in the BWP where searchSpaceMCCH is configured. It is contained in the bandwidth of the CFR for broadcast and larger than CORESET#0.
locationAndBandwidthBroadcast Indicates starting PRB and the number of PRBs of CFR used for MCCH and MTCH reception. Value sameAsSib1ConfiguredLocationAndBW means the CFR for broadcast has the same location and size as the locationAndBandwidth for initial BWP (for RedCap UEs: initialDownlinkBWP-RedCap if it is configured and includes CD-SSB and the entire CORESET#0) configured in SIB1. Value locationAndBandwidth is used to configure CFR with bandwidth that is larger than and fully contains the bandwidth for the initial DL BWP (for RedCap UEs: initialDownlinkBWP-RedCap if it is configured and includes CD-SSB and the entire CORESET#0) configured in SIB1 and CORESET#0. The value of the field shall be interpreted as defined in TS 38.214 with assumptions as described in TS 38.213. This field is not included in cfr-ConfigMCCH-MTCH-RedCap if initialDownlinkBWP-RedCap in SIB1 is configured but does not include CD-SSB and the entire CORESET#0. If the field is absent, the CFR for broadcast has the same location and size as CORESET#0.
pdsch-ConfigMCCH Indicates PDSCH parameters used for MCCH transmission. If the field is absent, PDSCH parameters used for MCCH are the same as those of PDSCH configuration provided in initialDownlinkBWP in SIB1.

Conditional Presence	Explanation
NotSIB1CommonControlResource	The field is optional present in case commonControlResourceSet is not configured in SIB1, Need R, otherwise it is absent.

– DRX-ConfigPTM p. 1400

The IE DRX-Config-PTM is used to configure DRX related parameters for PTM transmission as specified in TS 38.321.

DRX-Config-PTM information element

-- ASN1START
-- TAG-DRX-CONFIGPTM-START
DRX-ConfigPTM-r17 ::= SEQUENCE {
 drx-onDurationTimerPTM-r17 CHOICE {
  subMilliSeconds INTEGER (1..31),
  milliSeconds ENUMERATED {
  ms1, ms2, ms3, ms4, ms5, ms6, ms8, ms10, ms20, ms30, ms40,
  ms50, ms60, ms80, ms100, ms200, ms300, ms400, ms500, ms600,
  ms800, ms1000, ms1200, ms1600, spare8, spare7, spare6,
  spare5, spare4, spare3, spare2, spare1
  }
 },
 drx-InactivityTimerPTM-r17 ENUMERATED {
  ms0, ms1, ms2, ms3, ms4, ms5, ms6, ms8, ms10, ms20, ms30,
  ms40, ms50, ms60, ms80, ms100, ms200, ms300, ms500, ms750,
  ms1280, ms1920, ms2560, spare9, spare8, spare7, spare6,
  spare5, spare4, spare3, spare2, spare1
 },
 drx-HARQ-RTT-TimerDL-PTM-r17
  INTEGER (0..56) OPTIONAL, -- Cond HARQFeedback
 drx-RetransmissionTimerDL-PTM-r17 ENUMERATED {
  sl0, sl1, sl2, sl4, sl6, sl8, sl16, sl24, sl33, sl40, sl64,
  sl80, sl96, sl112, sl128, sl160, sl320, spare15, spare14,
  spare13, spare12, spare11, spare10, spare9, spare8,
  spare7, spare6, spare5, spare4, spare3, spare2, spare1
 } OPTIONAL, -- Cond HARQFeedback
 drx-LongCycleStartOffsetPTM-r17 CHOICE {
  ms10 INTEGER(0..9),
  ms20 INTEGER(0..19),
  ms32 INTEGER(0..31),
  ms40 INTEGER(0..39),
  ms60 INTEGER(0..59),
  ms64 INTEGER(0..63),
  ms70 INTEGER(0..69),
  ms80 INTEGER(0..79),
  ms128 INTEGER(0..127),
  ms160 INTEGER(0..159),
  ms256 INTEGER(0..255),
  ms320 INTEGER(0..319),
  ms512 INTEGER(0..511),
  ms640 INTEGER(0..639),
  ms1024 INTEGER(0..1023),
  ms1280 INTEGER(0..1279),
  ms2048 INTEGER(0..2047),
  ms2560 INTEGER(0..2559),
  ms5120 INTEGER(0..5119),
  ms10240 INTEGER(0..10239)
 },
 drx-SlotOffsetPTM-r17 INTEGER (0..31)
}
-- TAG-DRX-CONFIGPTM-STOP
-- ASN1STOP

DRX-Config-PTM field descriptions
drx-HARQ-RTT-Timer-DL-PTM Value in number of symbols of the CFR where the transport block was received.
drx-InactivityTimerPTM Value in multiple integers of 1 ms. ms0 corresponds to 0, ms1 corresponds to 1 ms, ms2 corresponds to 2 ms, and so on.
drx-LongCycleStartOffsetPTM drx-LongCycle-PTM in ms and drx-StartOffset-PTM in multiples of 1 ms.
drx-onDurationTimerPTM Value in multiples of 1/32 ms (subMilliSeconds) or in ms (milliSecond). For the latter, value ms1 corresponds to 1 ms, value ms2 corresponds to 2 ms, and so on.
drx-RetransmissionTimer-DL-PTM Value in number of slot lengths of the CFR where the transport block was received. value sl0 corresponds to 0 slots, sl1 corresponds to 1 slot, sl2 corresponds to 2 slots, and so on.
drx-SlotOffsetPTM Value in 1/32 ms. Value 0 corresponds to 0 ms, value 1 corresponds to 1/32 ms, value 2 corresponds to 2/32 ms, and so on.

Conditional Presence	Explanation
HARQFeedback	The field is mandatory present if HARQ feedback is enabled for a G-RNTI/G-CS-RNTI associated with this DRX configuration. The field is optionally present if the IE DRX-ConfigPTM is included in MBSMulticastConfiguration, need R. It is optionally present. Need R, otherwise.

– MBS-NeighbourCellList p. 1401

The IE MBS-NeighbourCellList indicates a list of neighbour cells where ongoing MBS sessions provided via broadcast MRB in the current cell may also be provided, as indicated in the mtch-NeighbourCell.

MBS-NeighbourCellList information element

-- ASN1START
-- TAG-MBS-NEIGHBOURCELLLIST-START
MBS-NeighbourCellList-r17 ::= SEQUENCE
 (SIZE (0..maxNeighCellMBS-r17)) OF MBS-NeighbourCell-r17
MBS-NeighbourCell-r17 ::= SEQUENCE {
 physCellId-r17 PhysCellId,
 carrierFreq-r17 ARFCN-ValueNR OPTIONAL -- Need S
}
-- TAG-MBS-NEIGHBOURCELLLIST-STOP
-- ASN1STOP

MBS-NeighbourCellList field descriptions
carrierFreq Indicates the frequency of the neighbour cell indicated by physCellId. Absence of the IE means that the neighbour cell is on the same frequency as the current cell.

– MBS-NonServingInfoList p. 1402

The IE MBS-NonServingInfoList is used to inform network of the frequencies, CFR information and subcarrier spacing for MBS broadcast reception on the non-serving cell.

MBS-NonServingInfoList information element

-- ASN1START
-- TAG-MBS-NONSERVINGINFOLIST-START
MBS-NonServingInfoList-r18 ::= SEQUENCE
 (SIZE (1..maxFreqMBS-r17)) OF NonServingInfo-r18
NonServingInfo-r18 ::= SEQUENCE {
 freqInfoMBS-r18 FreqInfoMBS-r18 OPTIONAL,
 cfr-InfoMBS-r18 CHOICE {
 cfr-Bandwidth-r18 INTEGER (1..maxNrofPhysicalResourceBlocks),
 cfr-LocationAndBW-r18 CFR-LocationAndBW-r18
 } OPTIONAL,
 subcarrierSpacing-r18 SubcarrierSpacing OPTIONAL
}
FreqInfoMBS-r18 ::= SEQUENCE {
 carrierFreqMBS-r18 ARFCN-ValueNR,
 freqBandIndicatorMBS-r18 FreqBandIndicatorNR
}
CFR-LocationAndBW-r18 ::= SEQUENCE {
 locationAndBandwidthMBS-r18 INTEGER (0..37949) OPTIONAL,
 absoluteFrequencyPointA-MBS-r18 ARFCN-ValueNR OPTIONAL,
 offsetToCarrierMBS-r18 INTEGER (0..2199) OPTIONAL
}
-- TAG-MBS-NONSERVINGINFOLIST-STOP
-- ASN1STOP

MBS-NonServingInfoList field descriptions
freqInfoMBS Indicates MBS frequency of interest and the frequency band of the non-serving cell for MBS broadcast reception acquired from the SIB21 or the USD as specified in clause 5.9.4.3.
cfr-infoMBS Indicates the CFR information of the non-serving cell for MBS broadcast reception.
cfr-BandwidthMBS Indicates the CFR bandwidth of the non-serving cell for MBS broadcast reception.
cfr-LocationAndBW Indicates the CFR location and bandwidth of the non-serving cell for MBS broadcast reception.
subcarrierSpacing Indicates the subcarrier spacing of the CORESET#0 of the non-serving cell for MBS broadcast reception.

CFR-LocationAndBW field descriptions
locationAndBandwidthMBS Indicates the starting PRB and the number of PRBs of CFR used for MBS broadcast reception from non-serving cell. The value of the field shall be interpreted as resource indicator value (RIV) as defined TS 38.214 with assumptions as described in TS 38.213. The first PRB is a PRB determined by subcarrierSpacing, offsetToCarrierMBS and absoluteFrequencyPointA-MBS of the non-serving cell.
absoluteFrequencyPointA-MBS Indicates the absolute frequency position of the reference resource block (Common RB 0) of the non-serving cell for MBS broadcast reception. Its lowest subcarrier is also known as Point A (see clause 4.4.4.2 of TS 38.211).
offsetToCarrierMBS Indicates the offset in frequency domain between Point A (lowest subcarrier of common RB 0) and the lowest usable subcarrier on this carrier in number of PRBs (using the subcarrierSpacing indicated for the non-serving cell).

– MBS-ServiceList p. 1403

The IE MBS- ServiceList is used to inform the network of the MBS services that the UE is receiving or interested to receive.

MBS-ServiceList information element

-- ASN1START
-- TAG-MBS-SERVICELIST-START
MBS-ServiceList-r17 ::= SEQUENCE
 (SIZE (1..maxNrofMBS-ServiceListPerUE-r17)) OF MBS-ServiceInfo-r17
MBS-ServiceInfo-r17 ::= SEQUENCE {
 tmgi-r17 TMGI-r17
}
-- TAG-MBS-SERVICELIST-STOP
-- ASN1STOP

– MBS-SessionInfoList p. 1404

The IE MBS-SessionInfoList provides the list of ongoing MBS broadcast sessions transmitted via broadcast MRB and, for each MBS broadcast session, the associated G-RNTI and scheduling information.

MBS-SessionInfoList information element

-- ASN1START
-- TAG-MBS-SESSIONINFOLIST-START
MBS-SessionInfoList-r17 ::= SEQUENCE
 (SIZE (1..maxNrofMBS-Session-r17)) OF MBS-SessionInfo-r17
MBS-SessionInfo-r17 ::= SEQUENCE {
 mbs-SessionId-r17 TMGI-r17,
 g-RNTI-r17 RNTI-Value,
 mrb-ListBroadcast-r17 MRB-ListBroadcast-r17,
 mtch-SchedulingInfo-r17
  DRX-ConfigPTM-Index-r17 OPTIONAL, -- Need S
 mtch-NeighbourCell-r17
  BIT STRING (SIZE(maxNeighCellMBS-r17)) OPTIONAL, -- Need S
 pdsch-ConfigIndex-r17
  PDSCH-ConfigIndex-r17 OPTIONAL, -- Need S
 mtch-SSB-MappingWindowIndex-r17
  MTCH-SSB-MappingWindowIndex-r17 OPTIONAL -- Cond MTCH-Mapping
}
DRX-ConfigPTM-Index-r17 ::= INTEGER (0..maxNrofDRX-ConfigPTM-1-r17)
PDSCH-ConfigIndex-r17 ::= INTEGER (0..maxNrofPDSCH-ConfigPTM-1-r17)
MTCH-SSB-MappingWindowIndex-r17 ::=
 INTEGER (0..maxNrofMTCH-SSB-MappingWindow-1-r17)
MRB-ListBroadcast-r17 ::= SEQUENCE
 (SIZE (1..maxNrofMRB-Broadcast-r17)) OF MRB-InfoBroadcast-r17
MRB-InfoBroadcast-r17 ::= SEQUENCE {
 pdcp-Config-r17 MRB-PDCP-ConfigBroadcast-r17,
 rlc-Config-r17 MRB-RLC-ConfigBroadcast-r17,
 ...
}
MRB-PDCP-ConfigBroadcast-r17 ::= SEQUENCE {
 pdcp-SN-SizeDL-r17 ENUMERATED {len12bits} OPTIONAL, -- Need S
 headerCompression-r17 CHOICE {
  notUsed NULL,
  rohc SEQUENCE {
   maxCID-r17 INTEGER (1..16) DEFAULT 15,
   profiles-r17 SEQUENCE {
    profile0x0000-r17 BOOLEAN,
    profile0x0001-r17 BOOLEAN,
    profile0x0002-r17 BOOLEAN
   }
  }
 },
 t-Reordering-r17 ENUMERATED {
  ms1, ms10, ms40, ms160, ms500, ms1000, ms1250, ms2750
 } OPTIONAL -- Need S
}
MRB-RLC-ConfigBroadcast-r17 ::= SEQUENCE {
 logicalChannelIdentity-r17 LogicalChannelIdentity,
 sn-FieldLength-r17 ENUMERATED {size6} OPTIONAL, -- Need S
 t-Reassembly-r17 T-Reassembly OPTIONAL -- Need S
}
-- TAG-MBS-SESSIONINFOLIST-STOP
-- ASN1STOP

MBS-SessionInfoList field descriptions
g-RNTI G-RNTI used to scramble the scheduling and transmission of MTCH.
headerCompression If rohc is configured, the UE shall apply the configured ROHC profile(s) in downlink.
mbs-SessionId Indicates an identifier of the MBS session provided by the MTCH.
mrb-listBroadcast A list of broadcast MRBs to which the associated broadcast MBS session is mapped to.
mtch-neighbourCell Indicates neighbour cells which provide this service on MTCH. The first bit is set to 1 if the service is provided on MTCH in the first cell in mbs-NeighbourCellList, otherwise it is set to 0. The second bit is set to 1 if the service is provided on MTCH in the second cell in mbs-NeighbourCellList, and so on. If the service is not available in any neighbouring cell and mbs-NeighbourCellList is signalled, the network sets all bits in this field to 0. The field is absent when mbs-NeighbourCellList is absent or an empty mbs-NeighbourCellList is signalled. If this field is absent when mbs-NeighbourCellList is absent or a non-empty mbs-NeighbourCellList is signalled, the related service may or may not be available in any neighbouring cell, i.e. the UE cannot determine the presence or absence of an MBS service in neighbouring cells based on the absence of this field. If this field is absent and an empty mbs-NeighbourCellList is signalled, then the UE shall assume that MBS broadcast services signalled in mbs-SessionInfoList in the MBSBroadcastConfiguration message are not provided in any neighbour cell.
mtch-schedulingInfo Indicates the index of DRX configuration entry in drx-ConfigPTM-List that is used for scheduling the MTCH. The value 0 corresponds to the first entry in drx-ConfigPTM-List, the value 1 corresponds to the second entry in drx-ConfigPTM-List and so on. In case mtch-schedulingInfo is absent for a G-RNTI (i.e. no PTM DRX), the UE shall monitor for PDCCH scrambled with G-RNTI in any slot according to the search space configured for MTCH (see clause 10.1 of TS 38.213).
mtch-SSB-MappingWindowIndex Indicates the index of MTCH-SSB-MappingWindowCycleOffset configuration entry in MTCH-SSB-MappingWindowList. The value 0 corresponds to the first entry in MTCH-SSB-MappingWindowList, the value 1 corresponds to the second entry in MTCH-SSB-MappingWindowList and so on. This field is set to the same value for all MBS sessions mapped to the same G-RNTI.
pdcp-SN-SizeDL Indicates that PDCP sequence number size of 12 bits is used, as specified in TS 38.323. When the field is absent the UE applies the value as specified in clause 9.1.1.7.
pdschConfigIndex Indicates the index of PDSCH configuration entry in pdschConfigList for MTCH. Value 0 corresponds to the first entry in pdschConfigList, the value 1 corresponds to the second entry in pdschConfigList and so on. When the field is absent the UE applies the first entry in pdschConfigList for MTCH.
sn-FieldLength Indicates that the RLC SN field size of 6 bits is used, see TS 38.322. When the field is absent the UE applies the value as specified in clause 9.1.1.7.
t-Reassembly Timer for reassembly in TS 38.322, in milliseconds. Value ms0 means 0 ms, value ms5 means 5 ms and so on. When the field is absent the UE applies the value in specified in clause 9.1.1.7.
t-Reordering Value in ms of t-Reordering specified in TS 38.323. Value ms1 corresponds to 1 ms, value ms10 corresponds to 10 ms, and so on. When the field is absent the UE applies the value as specified in clause 9.1.1.7.

Conditional Presence	Explanation
MTCH-Mapping	The field is mandatory present if the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1 is more than 1, and searchspaceMTCH is not set to zero (including the case where searchSpaceMTCH is absent and searchSpaceMCCH is not set to zero). Otherwise, it is absent, Need R.

– MBS-SessionInfoListMulticast p. 1407

The IE MBS-SessionInfoListMulticast provides a list of MBS multicast sessions transmitted via multicast MRB for RRC_INACTIVE UEs and, for each MBS multicast session, the associated G-RNTI and scheduling information.

MBS-SessionInfoListMulticast information element

-- ASN1START
-- TAG-MBS-SESSIONINFOLISTMULTICAST-START
MBS-SessionInfoListMulticast-r18 ::= SEQUENCE
 (SIZE (1..maxNrofMBS-Session-r17)) OF MBS-SessionInfoMulticast-r18
MBS-SessionInfoMulticast-r18 ::= SEQUENCE {
 mbs-SessionId-r18 TMGI-r17,
 g-RNTI-r18 RNTI-Value OPTIONAL, -- Need R
 mrb-ListMulticast-r18 MRB-ListMulticast-r18 OPTIONAL, -- Need R
 mtch-SchedulingInfo-r18 DRX-ConfigPTM-Index-r17 OPTIONAL, -- Need S
 mtch-NeighbourCell-r18
  BIT STRING (SIZE(maxNeighCellMBS-r17)) OPTIONAL, -- Need S
 pdsch-ConfigIndex-r18 PDSCH-ConfigIndex-r17 OPTIONAL, -- Need S
 mtch-SSB-MappingWindowIndex-r18
  MTCH-SSB-MappingWindowIndex-r17 OPTIONAL, -- Cond MTCH-Mapping
 thresholdIndex-r18
  INTEGER (0..maxNrofThresholdMBS-r18) OPTIONAL, -- Need R
 pdcp-SYNC-Indicator-r18 ENUMERATED {true} OPTIONAL, -- Cond RRCRelease
 stopMonitoringRNTI-r18 ENUMERATED {true} OPTIONAL -- Need R
}
MRB-ListMulticast-r18 ::= SEQUENCE
 (SIZE (1.. maxMRB-r17)) OF MRB-InfoMulticast-r18
MRB-InfoMulticast-r18 ::= SEQUENCE {
 pdcp-Config-r18 MRB-PDCP-ConfigMulticast-r18,
 rlc-Config-r18 MRB-RLC-ConfigMulticast-r18,
 ...
}
MRB-PDCP-ConfigMulticast-r18 ::= SEQUENCE {
 pdcp-SN-SizeDL-r18 ENUMERATED {len12bits, len18bits},
 headerCompression-r18 CHOICE {
  notUsed NULL,
  rohc SEQUENCE {
   maxCID-r18 INTEGER (1..16) DEFAULT 15,
   profiles-r18 SEQUENCE {
    profile0x0000-r18 BOOLEAN,
    profile0x0001-r18 BOOLEAN,
    profile0x0002-r18 BOOLEAN
   }
  }
 },
 t-Reordering-r17
  ENUMERATED {ms1, ms10, ms40, ms160, ms500, ms1000, ms1250, ms2750}
  OPTIONAL -- Need R
}
MRB-RLC-ConfigMulticast-r18 ::= SEQUENCE {
 logicalChannelIdentity-r18 CHOICE {
  logicalChannelIdentitymulticast-r18 LogicalChannelIdentity,
  logicalChannelIdentityExt-r18 LogicalChannelIdentityExt-r17
 },
 sn-FieldLength-r18 ENUMERATED {size6, size12},
 t-Reassembly-r18 T-Reassembly OPTIONAL -- Need R
}
-- TAG-MBS-SESSIONINFOLISTMULTICAST-STOP
-- ASN1STOP

MBS-SessionInfoListMulticast field descriptions
g-RNTI G-RNTI used to scramble the scheduling and transmission of multicast MTCH.
mbs-SessionId Indicates an identifier of the MBS session to be received by the UE in RRC_INACTIVE.
mrb-listMulticast A list of multicast MRBs to which the associated MBS multicast session is mapped to.
mtch-neighbourCell Indicates neighbour cells which provide this service on MTCH for RRC_INACTIVE. The first bit is set to 1 if the service is provided on MTCH in the first cell in mbs-NeighbourCellList, otherwise it is set to 0. The second bit is set to 1 if the service is provided on MTCH in the second cell in mbs-NeighbourCellList, and so on. If the service is not available in any neighbouring cell and mbs-NeighbourCellList is signalled, the network sets all bits in this field to 0. The field is absent when mbs-NeighbourCellList is absent or an empty mbs-NeighbourCellList is signalled. If this field is absent when mbs-NeighbourCellList is absent or a non-empty mbs-NeighbourCellList is signalled, the related service may or may not be available in any neighbouring cell, i.e. the UE cannot determine the presence or absence of an MBS service in neighbouring cells based on the absence of this field. If this field is absent and an empty mbs-NeighbourCellList is signalled, then the UE shall assume that MBS multicast services signalled in mbs-SessionInfoListMulticast in the MBSMulticastConfiguration message are not provided in any neighbour cell.
mtch-schedulingInfo Indicates the index of DRX configuration entry in drx-ConfigPTM-List that is used for scheduling the MTCH. The value 0 corresponds to the first entry in drx-ConfigPTM-List, the value 1 corresponds to the second entry in drx-ConfigPTM-List and so on. In case mtch-schedulingInfo is absent for a G-RNTI (i.e. no PTM DRX), the UE shall monitor for PDCCH scrambled with G-RNTI in any slot according to the search space configured for MTCH.
mtch-SSB-MappingWindowIndex Indicates the index of MTCH-SSB-MappingWindowCycleOffset configuration entry in MTCH-SSB-MappingWindowList. The value 0 corresponds to the first entry in MTCH-SSB-MappingWindowList, the value 1 corresponds to the second entry in MTCH-SSB-MappingWindowList and so on. This field is set to the same value for all MBS sessions mapped to the same G-RNTI.
pdcp-SN-SizeDL Indicates PDCP sequence number size of 12 or 18 bits, as specified in TS 38.323.
pdschConfigIndex Indicates the index of PDSCH configuration entry in pdschConfigList for MTCH. Value 0 corresponds to the first entry in pdschConfigList, the value 1 corresponds to the second entry in pdschConfigList and so on. When the field is absent the UE applies the first entry in pdschConfigList for MTCH.
pdcp-SYNC-indicator Indicates the PDCP COUNT of the corresponding multicast session is synchronized in the RNA, i.e. the cells in the RNA follow a common QoS flow to MRB mapping rule and at the same time PDCP COUNT is set according to the MBS QoS Flow SN.
sn-FieldLength Indicates RLC SN field size of 6 or12 bits, as specified in TS 38.322.
stopMonitoringRNTI Indicates the UE to stop monitoring the G-RNTI for the corresponding multicast session.
t-Reassembly Timer for reassembly in TS 38.322, in milliseconds. Value ms0 means 0 ms, value ms5 means 5 ms and so on.
t-Reordering Value in ms of t-Reordering specified in TS 38.323. Value ms1 corresponds to 1 ms, value ms10 corresponds to 10 ms, and so on.
thresholdIndex Indicates the index of thresholdMBS entry in thresholdMBS-List that is used for RRC connection resume for a UE receiving the corresponding multicast session in RRC_INACTIVE. Value 0 corresponds to the first entry in thresholdMBS-List, the value 1 corresponds to the second entry in thresholdMBS-List and so on.

Conditional Presence	Explanation
MTCH-Mapping	The field is mandatory present if the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1 is more than 1, and searchspaceMulticastMTCH is not set to zero (including the case where searchSpaceMulticastMTCH is absent and searchSpaceMulticastMCCH is not set to zero). Otherwise, it is absent, Need R.
RRCRelease	The field is optionally present if MBS-SessionInfoListMulticast is included in RRCRelease message. Otherwise, it is absent.

– MTCH-SSB-MappingWindowList p. 1410

The IE MTCH-SSB-MappingWindowList is used to configure MTCH PDCCH ocassions to SSB mapping window related periodic and offset parameters.

MTCH-SSB-MappingWindowList information element

-- ASN1START
-- TAG-MTCH-SSB-MAPPINGWINDOWLIST-START
MTCH-SSB-MappingWindowList-r17 ::= SEQUENCE
 (SIZE (1..maxNrofMTCH-SSB-MappingWindow-r17)) OF
 MTCH-SSB-MappingWindowCycleOffset-r17
MTCH-SSB-MappingWindowCycleOffset-r17 ::= CHOICE {
 ms10 INTEGER(0..9),
 ms20 INTEGER(0..19),
 ms32 INTEGER(0..31),
 ms64 INTEGER(0..63),
 ms128 INTEGER(0..127),
 ms256 INTEGER(0..255)
}
-- TAG-MTCH-SSB-MAPPINGWINDOWLIST-STOP
-- ASN1STOP

MTCH-SSB-MappingWindowList field descriptions
MTCH-SSB-MappingWindowCycleOffset Indicates the cycle and offset for MTCH PDCCH ocassions to SSB mapping. Values in unit of ms. ms10 corresponds to cycle of 10 ms with corresponding offset between 0 and 9 ms, value ms20 corresponds to cycle of 20 ms with corresponding offset between 0 and 19 ms, and so on. The mapping window starts at a subframe in a SFN where [(SFN number × 10) + subframe number] modulo (cycle) = offset. PDCCH monitoring occasions for MTCH in a mapping window which are not overlapping with UL symbols (determined according to tdd-UL-DL-ConfigurationCommon) are sequentially numbered starting from 1 in the maping window. The [x×N+K]th PDCCH monitoring occasion for MTCH in this mapping window corresponds to the Kth transmitted SSB, where x = 0, 1, ...X-1, K = 1, 2, …N, N is the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1 and X is equal to CEIL(number of PDCCH monitoring occasions in MTCH to SSB mapping transmission window/N). The actual transmitted SSBs are sequentially numbered from one in ascending order of their SSB indexes.

MTCH-SSB-MappingWindowList field descriptions

MTCH-SSB-MappingWindowCycleOffset

Indicates the cycle and offset for MTCH PDCCH ocassions to SSB mapping. Values in unit of ms. ms10 corresponds to cycle of 10 ms with corresponding offset between 0 and 9 ms, value ms20 corresponds to cycle of 20 ms with corresponding offset between 0 and 19 ms, and so on. The mapping window starts at a subframe in a SFN where [(SFN number × 10) + subframe number] modulo (cycle) = offset.

PDCCH monitoring occasions for MTCH in a mapping window which are not overlapping with UL symbols (determined according to tdd-UL-DL-ConfigurationCommon) are sequentially numbered starting from 1 in the maping window. The [x×N+K]th PDCCH monitoring occasion for MTCH in this mapping window corresponds to the Kth transmitted SSB, where x = 0, 1, ...X-1, K = 1, 2, …N, N is the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1 and X is equal to CEIL(number of PDCCH monitoring occasions in MTCH to SSB mapping transmission window/N). The actual transmitted SSBs are sequentially numbered from one in ascending order of their SSB indexes.

– PDSCH-ConfigBroadcast p. 1410

The IE PDSCH-ConfigBroadcast is used to configure parameters for acquiring the PDSCH for MCCH and MTCH.

PDSCH-ConfigBroadcast information element

-- ASN1START
-- TAG-PDSCH-CONFIGBROADCAST-START
PDSCH-ConfigBroadcast-r17 ::= SEQUENCE {
 pdschConfigList-r17 SEQUENCE (SIZE
  (1..maxNrofPDSCH-ConfigPTM-r17) ) OF PDSCH-ConfigPTM-r17,
 pdsch-TimeDomainAllocationList-r17
  PDSCH-TimeDomainResourceAllocationList-r16 OPTIONAL, -- Need R
 rateMatchPatternToAddModList-r17 SEQUENCE
  (SIZE (1..maxNrofRateMatchPatterns)) OF
  RateMatchPattern OPTIONAL, -- Need R
 lte-CRS-ToMatchAround-r17
  RateMatchPatternLTE-CRS OPTIONAL, -- Need R
 mcs-Table-r17
  ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S
 xOverhead-r17
  ENUMERATED {xOh6, xOh12, xOh18} OPTIONAL -- Need S
}
PDSCH-ConfigPTM-r17 ::= SEQUENCE {
 dataScramblingIdentityPDSCH-r17
  INTEGER (0..1023) OPTIONAL, -- Need S
 dmrs-ScramblingID0-r17
  INTEGER (0..65535) OPTIONAL, -- Need S
 pdsch-AggregationFactor-r17
  ENUMERATED {n2, n4, n8} OPTIONAL -- Need S
}
-- TAG-PDSCH-CONFIGBROADCAST-STOP
-- ASN1STOP

PDSCH-ConfigBroadcast field descriptions
lte-CRS-ToMatchAround Parameters to determine an LTE CRS pattern that the UE shall rate match around.
pdschConfigList List of PDSCH parameters which can be configured per G-RNTI. Only one entity is allowed to be configured if included in SIB20.
pdsch-TimeDomainAllocationList List of time-domain configurations for timing of DL assignment to DL data. The field pdsch-TimeDomainAllocationList applies to DCI format 4_0 (see table 5.1.2.1.1-1 in TS 38.214). When the field is absent, the UE follows PDSCH time domain resource allocation determination rule as specified in clause 5.1.2.1.1 of TS 38.214.
rateMatchPatternToAddModList Resources patterns which the UE should rate match PDSCH around. The UE rate matches around the union of all resources indicated in the rate match patterns (see clause 5.1.4.1 of TS 38.214).
mcs-Table Indicates which MCS table the UE shall use for PDSCH. If the field is absent the UE applies the value 64QAM. The field mcs-Table applies to DCI format 4_0 with CRC scrambled by MCCH-RNTI/G-RNTI (see clause 5.1.3.1 of TS 38.214).
xOverhead Accounts for an overhead from CSI-RS, CORESET, etc. If the field is absent, the UE applies value xOh0 (see clause 5.1.3.2 of TS 38.214).

PDSCH-ConfigPTM field descriptions
dataScramblingIdentityPDSCH Identifier(s) used to initialize data scrambling (c_init) for PDSCH as specified in clause 7.3.1.1 of TS 38.211. When the field is absent the UE applies the value physCellId configured for this serving cell.
dmrs-ScramblingID0 DL DMRS scrambling initialization (see clause 7.4.1.1.1 of TS 38.211). When the field is absent the UE applies the value physCellId configured for this serving cell.
pdsch-AggregationFactor Number of repetitions for dynamic scheduling of MBS broadcast data for MTCH PDSCH (see clause 5.1.2.1 of TS 38.214). When the field is absent the UE applies the value 1.

– TMGI p. 1412

The IE TMGI is used to identify the MBS session.

TMGI information element

-- ASN1START
-- TAG-TMGI-START
TMGI-r17 ::= SEQUENCE {
 plmn-Id-r17 CHOICE {
  plmn-Index INTEGER (1..maxPLMN),
  explicitValue PLMN-Identity
 },
 serviceId-r17 OCTET STRING (SIZE (3))
}
-- TAG-TMGI-STOP
-- ASN1STOP

TMGI field descriptions
plmn-Index PLMN index or NPN index according to the plmn-IdentityInfoList and npn-IdentityInfoList fields included in SIB1. If this field is included in the MRB-ToAddMod-r17, the UE translates the plmn-Index into the PLMN Identity or SNPN Identity based on the configuration in SIB1 (which is the SIB1 of the target cell in case of handover). The explicitValue is not used for MBS service(s) of an SNPN.
serviceId Uniquely identifies the identity of an MBS service within a PLMN. The field contains octet 3- 5 of the IE Temporary Mobile Group Identity (TMGI) as defined in TS 24.008. The first octet contains the third octet of the TMGI, the second octet contains the fourth octet of the TMGI and so on.

TMGI field descriptions

plmn-Index

PLMN index or NPN index according to the plmn-IdentityInfoList and npn-IdentityInfoList fields included in SIB1. If this field is included in the MRB-ToAddMod-r17, the UE translates the plmn-Index into the PLMN Identity or SNPN Identity based on the configuration in SIB1 (which is the SIB1 of the target cell in case of handover). The explicitValue is not used for MBS service(s) of an SNPN.

serviceId

Uniquely identifies the identity of an MBS service within a PLMN. The field contains octet 3- 5 of the IE Temporary Mobile Group Identity (TMGI) as defined in TS 24.008. The first octet contains the third octet of the TMGI, the second octet contains the fourth octet of the TMGI and so on.