Content for TS 33.128 Word version: 19.1.0
7 Service Layer Based Interception
7.1 Introduction
7.2 Central Subscriber Management
7.3 Location
7.4 Messaging
7.5 PTC service
7.6 Identifier Association Reporting
7.7 LI at NEF
7.8 LI at SCEF
7.9 LI for services encrypted by CSP-provided keys
7.10 LI in VPLMN for IMS-based services with home-routed roaming
7.11 STIR/SHAKEN and RCD/eCNAM
7.12 LI for IMS based services
7.13 RCS
7.14 LI at EES
7.15 LI at 5GMS AF
7.16 LI at NWDAF
...
...
7 Service Layer Based Interception p. 171
7.1 Introduction p. 171
7.2 Central Subscriber Management p. 171
7.2.1 General description p. 171
7.2.2 LI at UDM p. 171
7.2.2.1 General description p. 171
7.2.2.2 Provisioning over LI_X1 p. 171
7.2.2.3 Generation of xIRI over LI_X2 p. 172
7.2.2.3.1 General description p. 172
7.2.2.3.2 Serving system p. 172
7.2.2.3.3 Subscriber record change p. 172
7.2.2.3.4 Cancel location p. 175
7.2.2.3.5 Location information request p. 176
7.2.2.3.6 Location information result p. 176
7.2.2.3.7 UE information response p. 177
7.2.2.3.8 UE Authentication response p. 177
7.2.2.3.9 Start of Interception with UE registered at the UDM p. 178
7.2.2.3.10 Proximity services reporting at the UDM p. 178
7.2.2.4 Generation of IRI over LI_HI2 p. 179
7.2.3 LI at HSS p. 180
7.2.3.1 General p. 180
7.2.3.2 Provisioning over LI_X1 p. 180
7.2.3.3 Generation of xIRI over LI_X2 p. 180
7.2.3.3.1 General description p. 180
7.2.3.3.2 Serving system p. 181
7.2.3.3.3 Start of Interception with target registered at the HSS p. 181
7.2.3.3.4 Subscriber record change at the HSS p. 181
7.2.3.4 Generation of IRI over LI_HI2 p. 182
7.2.4 LI at the IMS-HSS p. 182
7.2.4.1 General p. 182
7.2.4.2 Provisioning over LI_X1 p. 183
7.2.4.3 Generation of xIRI over LI_X2 p. 183
7.2.4.3.1 General description p. 183
7.2.4.3.2 Serving system p. 183
7.2.4.3.3 Start of Interception with target registered at the IMS-HSS p. 183
7.2.4.3.4 Subscriber record change at the IMS-HSS p. 184
7.2.4.4 Generation of IRI over LI_HI2 p. 185
7.3 Location p. 185
7.3.1 Lawful Access Location Services (LALS) p. 185
7.3.1.1 General description p. 185
7.3.1.2 Provisioning over LI_X1 p. 186
7.3.1.3 Triggering over LI_T2 p. 187
7.3.1.4 Generation of xIRI over LI_X2 p. 188
7.3.1.5 Generation of IRI over LI_HI2 p. 189
7.3.2 Cell database information reporting p. 189
7.3.3 Use of the Location structure p. 190
7.3.3.1 General description p. 190
7.3.3.2 Location structure data types p. 191
7.3.3.2.1 Simple data types for location p. 191
7.3.3.2.2 Type: Location p. 193
7.3.3.2.3 Type: LocationInfo p. 194
7.3.3.2.4 Type: UserLocation p. 194
7.3.3.2.5 Type: EUTRALocation p. 195
7.3.3.2.6 Type: NRLocation p. 196
7.3.3.2.7 Type: N3GALocation p. 198
7.3.3.2.8 Type: UTRALocation p. 198
7.3.3.2.9 Type: GERALocation p. 199
7.3.3.2.10 Type: GeographicArea p. 200
7.3.3.2.11 Type: Point p. 201
7.3.3.2.12 Type: GeographicalCoordinates p. 201
7.3.3.2.13 Type: PointUncertaintyCircle p. 201
7.3.3.2.14 Type: PointUncertaintyEllipse p. 202
7.3.3.2.15 Type: UncertaintyEllipse p. 202
7.3.3.2.16 Type: Polygon p. 202
7.3.3.2.17 Type: PointAltitude p. 203
7.3.3.2.18 Type: PointAltitudeUncertainty p. 203
7.3.3.2.19 Type: EllipsoidArc p. 203
7.3.3.2.20 Enumeration: RATType p. 204
7.3.3.2.21 Type: CellInformation p. 204
7.3.3.2.22 Type: RANCGI p. 204
7.3.3.2.23 Type: TAI p. 205
7.3.3.2.24 Type: ECGI p. 205
7.3.3.2.25 Type: GlobalRANNodeID p. 205
7.3.3.2.26 Type: ANNodeID p. 205
7.3.3.2.27 Type: NgENBID p. 206
7.3.3.2.28 Type: NCGI p. 206
7.3.3.2.29 Type: IPAddr p. 206
7.3.3.2.30 Type: TNAPID p. 207
7.3.3.2.31 Type: TWAPID p. 207
7.3.3.2.32 Enumeration: W5GBANLineType p. 207
7.3.3.2.33 Enumeration: TransportProtocol p. 208
7.3.3.2.34 Type: PLMNID p. 208
7.3.3.2.35 Type: ENbID p. 208
7.3.3.2.36 Type: PositioningInfo p. 208
7.3.3.2.37 Type: LocationData p. 209
7.3.3.2.38 Type: RawMLPResponse p. 210
7.3.3.2.39 Type: VelocityEstimate p. 211
7.3.3.2.40 Type: CivicAddress p. 211
7.3.3.2.41 Type: PositioningMethodAndUsage p. 213
7.3.3.2.42 Type: GNSSPositioningMethodAndUsage p. 213
7.3.3.2.43 Type: HorizontalVelocity p. 213
7.3.3.2.44 Type: HorizontalWithVerticalVelocity p. 213
7.3.3.2.45 Type: HorizontalVelocityWithUncertainty p. 214
7.3.3.2.46 Type: HorizontalWithVerticalVelocityAndUncertainty p. 214
7.3.3.2.47 Type: LocationPresenceReport p. 214
7.3.3.2.48 Type: AMFEventArea p. 215
7.3.3.2.49 Type: RMInfo p. 215
7.3.3.2.50 Type: CMInfo p. 216
7.3.3.2.51 Enumeration: AccuracyFulfilmentIndicator p. 216
7.3.3.2.52 Enumeration: PositioningMethod p. 216
7.3.3.2.53 Enumeration: PositioningMode p. 217
7.3.3.2.54 Enumeration: GNSSID p. 217
7.3.3.2.55 Enumeration: Usage p. 217
7.3.3.2.56 Enumeration: VerticalDirection p. 218
7.3.3.2.57 Type: IMSLocation p. 218
7.3.3.2.58 Type: PANIHeaderInfo p. 218
7.3.3.2.59 Type: SIPGeolocationHeaderInfo p. 219
7.3.3.2.60 Type: SIPLocationInfo p. 219
7.3.3.2.61 Type: SIPCNIHeaderInfo p. 219
7.3.3.2.62 Type: PresenceInfo p. 220
7.3.3.2.63 Type: LADNInfo p. 220
7.3.3.2.64 Enumeration: AMFEventType p. 221
7.3.3.2.65 Enumeration: AccessType p. 221
7.3.3.2.66 Enumeration: UEReachability p. 221
7.3.3.2.67 Enumeration: RMState p. 221
7.3.3.2.68 Enumeration: CMState p. 222
7.3.3.2.69 Enumeration: PresenceState p. 222
7.3.3.2.70 Type: FourGPositioningInfo p. 222
7.3.3.2.71 Type: FourGLocationInfo p. 223
7.3.3.2.72 Type: CGI p. 223
7.3.3.2.73 Type: SAI p. 224
7.3.3.2.74 Type: ESMLCCellInfo p. 224
7.3.3.2.75 Type: GERANPositioningInfo p. 224
7.3.3.2.76 Type: UTRANPositioningInfo p. 225
7.3.3.2.77 Type: EPSLocationInformation p. 225
7.3.3.2.78 Type: MMELocationInformation p. 225
7.3.3.2.79 Type: SGSNLocationInformation p. 226
7.3.3.2.80 Type: UserCSGInformation p. 227
7.3.3.2.81 Type: LAI p. 227
7.3.3.2.82 Type: RAI p. 228
7.3.3.2.83 Enumeration: CSGAccessMode p. 228
7.3.3.2.84 Enumeration: CSGMembershipIndication p. 228
7.3.3.3 Reference datum p. 228
7.3.4 Separated location reporting p. 229
7.3.4.1 General description p. 229
7.3.5 Location acquisition p. 229
7.3.5.1 General description p. 229
7.3.5.2 Acquisition request over LI_HILA p. 230
7.3.5.3 Acquisition request over LI_XLA p. 230
7.3.5.4 Location acquisition procedure at the LARF p. 230
7.3.5.4.1 General description p. 230
7.3.5.4.2 Location acquisition procedure at the LARF in case of EPC p. 230
7.3.5.4.3 Location acquisition procedure at the LARF in case of 5GC p. 231
7.3.5.5 Location acquisition delivery via the LI_HILA p. 232
7.3.5.5.1 Location acquisition response over LI_XLA p. 232
7.3.5.5.2 Location acquisition response over LI_HILA p. 232
7.3.5.6 Location acquisition delivery via the LI_HI2 p. 232
7.3.5.6.1 Provisioning of the MDF2 p. 232
7.3.5.6.2 LI_X2_LA delivery p. 233
7.3.5.6.3 LI_HI2 delivery p. 233
7.3.6 Location Only Reporting p. 233
7.4 Messaging p. 235
7.4.1 Introduction p. 235
7.4.2 LI at the MMS Proxy-Relay p. 235
7.4.2.1 Provisioning over LI_X1 p. 235
7.4.2.2 Generation of xIRI over LI_X2 p. 235
7.4.2.3 Generation of xCC over LI_X3 p. 235
7.4.2.4 MMS Record Generation Cases p. 236
7.4.3 MMS Records p. 236
7.4.3.1 MMSSend p. 236
7.4.3.2 MMSSendByNonLocalTarget p. 239
7.4.3.2A MMSConvertedFromEmail p. 243
7.4.3.3 MMSNotification p. 243
7.4.3.4 MMSSendToNonLocalTarget p. 244
7.4.3.4A MMSConvertedToEmail p. 247
7.4.3.5 MMSNotificationResponse p. 248
7.4.3.6 MMSRetrieval p. 249
7.4.3.7 MMSDeliveryAck p. 252
7.4.3.8 MMSForward p. 253
7.4.3.9 MMSDeleteFromRelay p. 256
7.4.3.10 MMSMBoxStore p. 257
7.4.3.11 MMSMBoxUpload p. 257
7.4.3.12 MMSMBoxDelete p. 258
7.4.3.13 MMSDeliveryReport p. 259
7.4.3.14 MMSDeliveryReportNonLocalTarget p. 259
7.4.3.15 MMSReadReport p. 260
7.4.3.16 MMSReadReportNonLocalTarget p. 261
7.4.3.17 MMSCancel p. 262
7.4.3.18 MMSMBoxViewRequest p. 263
7.4.3.19 MMSMBoxViewResponse p. 263
7.4.3.20 MMBoxDescription p. 264
7.4.3.21 MMS Content p. 267
7.4.4 IRI and CC Generation p. 267
7.4.5 Redaction of unauthorised information from encapsulated messages p. 267
7.4.5.1 General p. 267
7.4.5.2 SMS Redaction p. 267
7.4.5.2.1 3GPP SMS Redaction p. 267
7.4.5.2.2 3GPP2 SMS Redaction p. 268
7.5 PTC service p. 268
7.5.1 Introduction p. 268
7.5.1.1 Provisioning over LI_X1 p. 268
7.5.1.2 Generating xIRI over LI_X2 p. 268
7.5.1.3 Generation of xCC over LI_X3 p. 268
7.5.2 IRI events p. 269
7.5.2.1 PTC registration p. 269
7.5.2.2 PTC session initiation p. 269
7.5.2.3 PTC session abandon attempt p. 270
7.5.2.4 PTC session start p. 270
7.5.2.5 PTC session end p. 271
7.5.2.6 PTC start of interception p. 272
7.5.2.7 PTC pre-established session p. 273
7.5.2.8 PTC instant personal alert p. 274
7.5.2.9 PTC party join p. 274
7.5.2.10 PTC party drop p. 275
7.5.2.11 PTC party hold p. 275
7.5.2.12 PTC media modification p. 276
7.5.2.13 PTC group advertisement p. 276
7.5.2.14 PTC floor control p. 277
7.5.2.15 PTC target presence p. 278
7.5.2.16 PTC participant presence p. 279
7.5.2.17 PTC list management p. 279
7.5.2.18 PTC access policy p. 280
7.5.3 IRI and CC Generation p. 281
7.6 Identifier Association Reporting p. 282
7.6.1 General p. 282
7.6.2 ICF p. 282
7.6.2.1 General p. 282
7.6.2.2 ICF receipt of records over LI_XER p. 282
7.6.2.3 ICF Query and Response over LI_XQR p. 282
7.6.2.4 ICF Identifier Association Event Handling p. 282
7.6.3 IQF p. 283
7.7 LI at NEF p. 284
7.7.1 Provisioning over LI_X1 p. 284
7.7.2 LI for NIDD using NEF p. 285
7.7.2.1 Generation of xIRI at IRI-POI in NEF over LI_X2 p. 285
7.7.2.1.1 General p. 285
7.7.2.1.2 PDU session establishment p. 285
7.7.2.1.3 PDU session modification p. 285
7.7.2.1.4 PDU session release p. 286
7.7.2.1.5 Unsuccessful procedure p. 286
7.7.2.1.6 Start of interception with established PDU session p. 287
7.7.2.2 Generation of xCC at CC-POI in NEF over LI_X3 p. 287
7.7.2.3 Generation of IRI over LI_HI2 p. 288
7.7.2.4 Generation of CC over LI_HI3 p. 288
7.7.3 LI for device triggering p. 288
7.7.3.1 Generation of xIRI LI_X2 at IRI-POI in NEF over LI_X2 p. 288
7.7.3.1.1 General p. 288
7.7.3.1.2 Device trigger p. 288
7.7.3.1.3 Device trigger replace p. 289
7.7.3.1.4 Device trigger cancellation p. 289
7.7.3.1.5 Device trigger report notification p. 290
7.7.3.2 Generation of IRI over LI_HI2 p. 290
7.7.4 LI for MSISDN-less MO SMS p. 291
7.7.4.1 Generation of xIRI LI_X2 at IRI-POI in NEF over LI_X2 p. 291
7.7.4.1.1 General p. 291
7.7.4.1.2 MSISDN-less MO SMS p. 291
7.7.4.2 Generation of IRI over LI_HI2 p. 291
7.7.5 LI for parameter provisioning p. 292
7.7.5.1 Generation of xIRI LI_X2 at IRI-POI in NEF over LI_X2 p. 292
7.7.5.1.1 General p. 292
7.7.5.1.2 Expected UE behaviour update p. 292
7.7.5.2 Generation of IRI over LI_HI2 p. 292
7.7.6 LI for AF session with QoS p. 293
7.7.6.1 Generation of xIRI at IRI-POI in NEF over LI_X2 p. 293
7.7.6.1.1 General p. 293
7.7.6.1.2 AF session with QoS provision p. 293
7.7.6.1.3 AF session with QoS notification p. 294
7.7.6.2 Generation of IRI over LI_HI2 p. 294
7.7.7 LI for 5G LAN parameter provisioning p. 294
7.7.7.1 Generation of xIRI at IRI-POI in NEF p. 294
7.7.7.1.1 General p. 294
7.7.7.1.2 5G VN group creation p. 294
7.7.7.1.3 5G VN group update p. 295
7.7.7.1.4 5G VN group deletion p. 295
7.7.7.1.5 5G VN group query p. 296
7.7.7.2 Generation of IRI over LI_HI2 p. 296
7.8 LI at SCEF p. 296
7.8.1 Provisioning over LI_X1 p. 296
7.8.2 LI for NIDD using SCEF p. 297
7.8.2.1 Generation of xIRI at IRI-POI in SCEF over LI_X2 p. 297
7.8.2.1.1 General p. 297
7.8.2.1.2 SCEF PDN connection establishment p. 297
7.8.2.1.3 PDN connection update p. 298
7.8.2.1.4 PDN connection release p. 299
7.8.2.1.5 Unsuccessful procedure p. 300
7.8.2.1.6 Start of interception with established PDN connection p. 301
7.8.2.2 Generation of xCC at CC-POI in SCEF over LI_X3 p. 301
7.8.2.3 Generation of IRI over LI_HI2 p. 301
7.8.2.4 Generation of CC over LI_HI3 p. 302
7.8.3 LI for device triggering p. 302
7.8.3.1 Generation of xIRI LI_X2 at IRI-POI in SCEF over LI_X2 p. 302
7.8.3.1.1 General p. 302
7.8.3.1.2 Device trigger p. 302
7.8.3.1.3 Device trigger replacement p. 303
7.8.3.1.4 Device trigger cancellation p. 303
7.8.3.1.5 Device trigger report notification p. 304
7.8.3.2 Generation of IRI over LI_HI2 p. 304
7.8.4 LI for MSISDN-less MO SMS p. 305
7.8.4.1 Generation of xIRI LI_X2 at IRI-POI in SCEF over LI_X2 p. 305
7.8.4.1.1 General p. 305
7.8.4.1.2 MSISDN-less MO SMS p. 305
7.8.4.2 Generation of IRI over LI_HI2 p. 305
7.8.5 LI for parameter provisioning p. 306
7.8.5.1 Generation of xIRI LI_X2 at IRI-POI in SCEF over LI_X2 p. 306
7.8.5.1.1 General p. 306
7.8.5.1.2 Communication pattern update p. 306
7.8.5.2 Generation of IRI over LI_HI2 p. 307
7.8.6 LI for AS session with QoS p. 307
7.9 LI for services encrypted by CSP-provided keys p. 309
7.9.1 LI for general AKMA-based service p. 309
7.9.1.1 General p. 309
7.9.1.2 Provisioning over LI_X1 p. 309
7.9.1.2.1 General p. 309
7.9.1.2.2 Provisioning of the IRI-POI and IRI-TF in AAnF p. 309
7.9.1.2.3 Triggering of the IRI-POI in AF p. 310
7.9.1.3 Generation of xIRI at IRI-POI in AAnF over LI_X2 p. 310
7.9.1.3.1 General p. 310
7.9.1.3.2 AAnF Anchor Key Register p. 310
7.9.1.3.3 AAnF AKMA application key get p. 311
7.9.1.3.4 AAnF Start of intercept with established AKMA key material p. 311
7.9.1.3.5 AAnF AKMA context removal p. 311
7.9.1.4 Generation of xIRI at IRI-POI in AF over LI_X2 p. 312
7.9.1.4.1 General p. 312
7.9.1.4.2 AF Application key refresh p. 312
7.9.1.4.3 AF Start of intercept with established AKMA application key p. 312
7.9.1.4.4 AF Auxiliary security parameter establishment p. 312
7.9.1.4.5 AF Application key removal p. 313
7.9.1.5 Generation of IRI over LI_HI2 p. 313
7.10 LI in VPLMN for IMS-based services with home-routed roaming p. 313
7.10.1 Background p. 313
7.10.2 Backward compatibility p. 314
7.10.3 HR LI Phase 1 p. 314
7.10.3.1 Overview p. 314
7.10.3.2 Provisioning over LI_X1 p. 315
7.10.3.2.1 General p. 315
7.10.3.2.2 Provisioning of BBIFF-C and BBIFF p. 315
7.10.3.2.3 Provisioning of LMISF-IRI p. 315
7.10.3.3 Generation of xIRI over LI_X2_LITE p. 316
7.10.3.4 LMISF-IRI handling of xIRIs received over LI_X2_LITE p. 320
7.10.3.5 Triggering of BBIFF-U from BBIFF-C over LI_T3 p. 320
7.10.3.6 Generation of xCC over LI_X3_LITE_S p. 323
7.10.3.7 LMISF-IRI handling of xCC received over LI_X3_LITE_S p. 323
7.10.4 HR LI Phase 2 p. 323
7.10.4.1 Overview p. 324
7.10.4.2 Provisioning over LI_X1 p. 324
7.10.4.2.1 General p. 324
7.10.4.2.2 Provisioning of LMISF-IRI p. 325
7.10.4.2.3 Provisioning of the MDF2 p. 325
7.10.4.2.4 Provisioning of the MDF3 p. 326
7.10.4.3 Generation of xIRI over LI_X2 p. 327
7.10.4.3.1 General concepts p. 327
7.10.4.3.2 Target match p. 327
7.10.4.3.2.1 General p. 327
7.10.4.3.2.2 LMISF-IRI provisioned for voice p. 328
7.10.4.3.2.3 LMISF-IRI provisioned for messaging p. 328
7.10.4.3.3 xIRIs p. 329
7.10.4.4 Triggering of BBIFF-C from LMISF over LI_T1 p. 329
7.10.4.5 Triggering of BBIFF-U from BBIFF-C over LI_T3 p. 331
7.10.4.6 Generation of xCC over LI_X3_LITE_M p. 333
7.10.4.7 Generation of xCC over LI_X3 p. 333
7.10.4.8 Correlation identifier p. 333
7.10.4.9 Generation of IRI over LI_HI2 p. 334
7.10.4.10 Generation of CC over LI_HI3 p. 334
7.11 STIR/SHAKEN and RCD/eCNAM p. 334
7.11.1 Provisioning over LI_X1 p. 334
7.11.1.1 General p. 334
7.11.1.2 Provisioning of the IRI-POI in the IMS network functions p. 334
7.11.1.3 Provisioning of the MDF2 p. 335
7.11.2 Generation of xIRI at IRI-POI in the IMS Network Functions over LI_X2 p. 336
7.11.2.1 General p. 336
7.11.2.2 Signature generation p. 336
7.11.2.3 Signature validation p. 339
7.11.2.4 IMS Network Function that interacts with signing AS p. 340
7.11.2.5 IMS Network Function that interacts with the verification AS p. 341
7.11.3 Generation of IRI over LI_HI2 p. 341
7.12 LI for IMS based services p. 342
7.12.1 General p. 342
7.12.2 Overview p. 342
7.12.2.1 General p. 342
7.12.2.2 Target type and target identifiers p. 342
7.12.2.3 Roaming considerations p. 343
7.12.2.4 Service specific aspects p. 343
7.12.2.4.1 General p. 343
7.12.2.4.2 LI for normal sessions p. 343
7.12.2.4.3 LI for redirected sessions p. 343
7.12.2.4.4 LI for conferencing p. 343
7.12.2.4.5 STIR/SHAKEN p. 344
7.12.2.4.6 RCD/eCNAM p. 344
7.12.2.4.7 Called party address translation p. 344
7.12.2.4.8 IMS Data Channel p. 344
7.12.2.5 Service scoping p. 344
7.12.2.5.1 General p. 344
7.12.2.5.2 LI for voice p. 345
7.12.2.5.3 LI for Messaging p. 345
7.12.2.5.4 LI for voice-mail p. 345
7.12.2.5.5 LI for RCS p. 346
7.12.2.5.6 LI for PTC service p. 346
7.12.2.5.7 LALS triggering p. 346
7.12.2.5.8 LI for IMS Data Channel p. 346
7.12.2.6 Location reporting p. 346
7.12.2.7 Deployment considerations p. 346
7.12.2.8 Identifying the intercepted IMS-based communications p. 347
7.12.2.8.1 General concepts p. 347
7.12.2.8.2 Target match p. 347
7.12.2.9 Handling of correlation information p. 349
7.12.3 Provisioning over LI_X1 p. 350
7.12.3.1 General p. 350
7.12.3.2 Provisioning of IRI-POI p. 350
7.12.3.3 Provisioning of CC-TF p. 352
7.12.3.4 Provisioning of the MDF2 p. 353
7.12.3.5 Provisioning of the MDF3 p. 354
7.12.4 Generation of xIRIs over LI_X2 p. 354
7.12.4.1 IRI-POIs in IMS signalling functions p. 354
7.12.4.1.1 General p. 354
7.12.4.1.2 IRI-POI in P-CSCF p. 355
7.12.4.1.2.1 Session-based IMS communications p. 355
7.12.4.1.2.2 Session-independent IMS communications p. 355
7.12.4.1.3 IRI-POI in S-CSCF p. 355
7.12.4.1.3.1 Session-based IMS communications p. 355
7.12.4.1.3.2 Session-independent IMS communications p. 356
7.12.4.1.4 IRI-POI in E-CSCF p. 356
7.12.4.1.5 IRI-POI in IBCF p. 356
7.12.4.1.5.1 Session-based IMS communications p. 356
7.12.4.1.5.2 Session-independent IMS communications p. 357
7.12.4.1.6 IRI-POI in MGCF p. 357
7.12.4.1.6.1 Session-based IMS communications p. 357
7.12.4.1.6.2 Session-independent IMS communications p. 357
7.12.4.1.7 IRI-POI in AS p. 357
7.12.4.1.7.1 Session-based IMS communications p. 357
7.12.4.1.7.2 Session-independent IMS communications p. 357
7.12.4.1.8 IRI-POI in DCSF p. 357
7.12.4.2 IMS records p. 358
7.12.4.2.1 IMS Message p. 358
7.12.4.2.2 Start of interception with Active IMS session p. 359
7.12.4.2.3 IMS CC Unavailable p. 360
7.12.4.2.4 IMS Data Channel Setup p. 360
7.12.4.2.5 IMS Data Channel Modification p. 361
7.12.4.2.6 IMS Data Channel Termination p. 362
7.12.4.3 IMS record parameters p. 362
7.12.4.3.1 Type: IMSPayload p. 362
7.12.4.3.2 Enumeration: SessionDirection p. 362
7.12.4.3.3 Enumeration: VoIPRoamingIndication p. 363
7.12.4.3.4 Type: SIPMessage p. 363
7.12.4.3.5 Type: SIPAccessNetworkInformation p. 363
7.12.4.3.6 Type: SIPCellularNetworkInformation p. 364
7.12.4.3.7 Type: ModifiedSIPMessage p. 364
7.12.5 Triggering of CC-POI by CC-TF over LI_T3 p. 364
7.12.5.1 CC-TFs in IMS signalling functions p. 364
7.12.5.1.1 General p. 364
7.12.5.1.2 CC-TF in P-CSCF p. 364
7.12.5.1.3 CC-TF in IBCF p. 365
7.12.5.1.4 CC-TF in MGCF p. 365
7.12.5.1.5 CC-TF in AS/MRFC p. 365
7.12.5.1.6 IMS Data Channel media interception p. 365
7.12.5.2 LI_T3 triggering details p. 366
7.12.5.2.1 General p. 366
7.12.5.2.2 Activation Task p. 367
7.12.5.2.2.1 Overview p. 367
7.12.5.2.2.2 Activation of CC-POI in IMS-AGW, TrGW, IM-MGW p. 369
7.12.5.2.2.3 CC-POI in MRFP p. 372
7.12.5.2.2.4 Activation of CC-POI when media interceptions are done at both sides IMS media function p. 373
7.12.5.2.3 ModifyTask p. 375
7.12.5.2.4 DeactivateTask p. 376
7.12.6 Generation of xCC over LI_X3 p. 376
7.12.6.1 General p. 376
7.12.6.2 Media capture p. 376
7.12.6.3 Payload format p. 377
7.12.6.4 Payload direction p. 377
7.12.6.5 SDP session description p. 377
7.12.6.6 Additional XID related information p. 378
7.12.7 Generation of IRI over LI_HI2 p. 378
7.12.7.1 General p. 378
7.12.7.2 Handling of multiple instances of list of mediation details p. 379
7.12.7.3 Mid-session activation for additional warrants at MDF2 p. 379
7.12.7.4 Location reporting p. 379
7.12.8 Generation of CC over LI_HI3 p. 379
7.12.8.1 General p. 379
7.12.8.2 Handling of multiple instances of list of mediation details p. 379
7.12.8.3 Handling of additional XID related information p. 379
7.12.8.4 SDP session description p. 380
7.12.8.5 Mid-session activation for additional warrants at MDF3 p. 380
7.12.8.6 Media handling at the MDF and LEMF p. 380
7.12.9 Removal of unauthorised information from IMS record payloads p. 380
7.12.9.1 General p. 380
7.12.9.2 Removal of location information p. 380
7.12.9.2.1 General p. 380
7.12.9.2.2 P-Access-Network-Info location removal p. 380
7.12.9.2.3 Cellular-Network-Info location removal p. 381
7.12.9.2.4 Geolocation header location removal p. 381
7.12.9.2.5 Removal of location information from presence information p. 381
7.12.9.3 Removal of communications content p. 381
7.12.10 Generation of xIRI from media plane packets p. 381
7.12.10.1 General p. 381
7.12.11 Interception of post dialled digits p. 382
7.13 RCS p. 382
7.13.1 Provisioning over LI_X1 p. 382
7.13.1.1 General p. 382
7.13.1.2 Provisioning of the POIs and TFs in the RCS Server and the POIs in the HTTP Content Server, File Transfer Localization Function and S-CSCF by the LIPF p. 383
7.13.1.3 Provisioning of the MDF2 p. 383
7.13.1.4 Provisioning of the MDF3 p. 384
7.13.2 Triggering of the IRI-POI and CC-POI in the HTTP Content Server p. 385
7.13.2.1 Triggering of the IRI-POI in the HTTP Content Server over LI_T2 p. 385
7.13.2.2 Triggering of the CC-POI in the HTTP Content Server over LI_T3 p. 386
7.13.3 Generation of xIRI at IRI-POI in the RCS Server over LI_X2 p. 387
7.13.3.1 General p. 387
7.13.3.1.1 Introduction p. 387
7.13.3.1.2 Common parameters for RCS reporting p. 387
7.13.3.1.2.1 Simple types p. 387
7.13.3.1.2.2 Type: RCSIdentity p. 388
7.13.3.1.2.3 Type: RCSDestinations p. 388
7.13.3.1.2.4 Type: RCSDestination p. 388
7.13.3.2 Registration p. 388
7.13.3.3 RCS Message p. 389
7.13.3.4 RCS Session reporting p. 391
7.13.3.4.1 General p. 391
7.13.3.4.2 Session establishment attempt p. 392
7.13.3.4.2.1 RCSSessionEstablishmentAttempt record p. 392
7.13.3.4.2.2 Large Message Mode CPM Standalone session p. 392
7.13.3.4.2.3 CPM 1-to-1 Chat session establishment p. 393
7.13.3.4.3 Session modification p. 393
7.13.3.4.3.1 RCSSessionModification record p. 393
7.13.3.4.3.2 CPM Standalone Message session modification p. 394
7.13.3.4.3.3 CPM 1-to-1 Chat session modification p. 394
7.13.3.4.4 Session release p. 394
7.13.3.4.4.1 RCSSessionRelease record p. 394
7.13.3.4.4.2 CPM Standalone Message session release p. 395
7.13.3.4.4.3 CPM 1-to-1 Chat session release p. 395
7.13.3.4.5 RCS session parameters p. 395
7.13.3.5 Capability discovery p. 396
7.13.3.6 RCS reported at the start of intercept p. 397
7.13.4 Generation of IRI over LI_HI2 p. 400
7.13.5 Redaction of unauthorised information from encapsulated RCS payloads p. 401
7.13.5.1 General p. 401
7.13.5.2 Redaction of location information p. 401
7.13.5.2.1 General p. 401
7.13.5.2.2 Redaction of location information from presence information p. 401
7.13.5.2.3 Redaction of location information from CPIM messages p. 401
7.13.5.3 Redaction of communications content p. 402
7.13.6 Generation of xCC over LI_X3 p. 402
7.13.6.1 General p. 402
7.13.6.2 Generation of xCC at the CC-POI in the RCS Server p. 403
7.13.6.3 Generation of xCC at the CC-POI in the HTTP Content Server p. 403
7.13.6.4 Generation of xCC at the CC-POI in the File Localisation Server p. 403
7.13.6.5 Payload direction p. 403
7.13.7 Generation of CC over LI_HI3 p. 403
7.14 LI at EES p. 404
7.14.1 Provisioning over LI_X1 p. 404
7.14.2 Generation of xIRI at IRI-POI in EES over LI_X2 p. 405
7.14.2.1 General p. 405
7.14.2.2 EEC registration and deregistration p. 405
7.14.2.3 EAS discovery p. 406
7.14.2.4 EAS discovery subscription p. 407
7.14.2.5 EAS discovery notification p. 408
7.14.2.6 Application context relocation p. 409
7.14.2.7 Application context relocation information subscription p. 409
7.14.2.8 Application context relocation information notification p. 410
7.14.2.9 EEC context relocation p. 410
7.14.2.10 Start of interception with registered EEC p. 411
7.14.2.11 Generation of IRI over LI_HI2 p. 411
7.15 LI at 5GMS AF p. 412
7.15.1 Provisioning over LI_X1 p. 412
7.15.2 Generation of xIRI over LI_X2 p. 413
7.15.2.1 General p. 413
7.15.2.2 Service access information p. 413
7.15.2.3 Consumption reporting p. 413
7.15.2.4 Dynamic policy invocation p. 414
7.15.2.5 Metrics reporting p. 414
7.15.2.6 Network assistance p. 415
7.15.2.7 Unsuccessful procedure p. 415
7.15.2.8 Start of interception with already configured UE p. 416
7.15.3 Generation of IRI over LI_HI2 p. 417
7.16 LI at NWDAF p. 417
7.16.1 Provisioning over LI_X1 p. 417
7.16.2 Generation of xIRI over LI_X2 p. 418
7.16.2.1 General p. 418
7.16.2.1.1 Target matching p. 418
7.16.2.2 Events subscription p. 419
7.16.2.3 Events notification p. 419
7.16.2.4 Analytics info query p. 420
7.16.2.5 Roaming scenarios p. 421
7.16.3 Generation of IRI over LI_HI2 p. 422
