| 22.228 | 0233 | 2 | 16.1.0 | Rel-17 | IMS emergency requirement for NPN with IMS voice | S1-193535 | agreed | SP-191035 | approved | 17.0.0 |
| 22.228 | 0233 | 1 | 16.1.0 | Rel-17 | IMS emergency requirement for NPN with IMS voice | S1-193483 | revised | | | |
| 22.228 | 0233 | - | 16.1.0 | Rel-17 | IMS emergency requirement for NPN with IMS voice | S1-193132 | revised | | | |
| 22.228 | 0232 | 1 | 16.0.0 | Rel-16 | Support for services using Artificial Intelligent | S1-182546 | noted | | | |
| 22.228 | 0232 | - | 16.0.0 | Rel-16 | Support for services using Artificial Intelligent | S1-182231 | revised | | | |
| 22.228 | 0231 | 1 | 16.0.0 | Rel-16 | Interworking with ONVIF cameras | S1-182522 | noted | | | |
| 22.228 | 0231 | - | 16.0.0 | Rel-16 | Interworking with ONVIF cameras | S1-182229 | revised | | | |
| 22.228 | 0230 | 3 | 16.0.0 | Rel-16 | Addition of requirement for VR Telepresence | S1-182767 | agreed | SP-180759 | approved | 16.1.0 |
| 22.228 | 0230 | 2 | 16.0.0 | Rel-16 | Addition of requirement for VR Telepresence | S1-182718 | revised | | | |
| 22.228 | 0230 | 1 | 16.0.0 | Rel-16 | Addition of requirement for VR Telepresence | S1-182523 | revised | | | |
| 22.228 | 0230 | - | 16.0.0 | Rel-16 | Addition of requirement for VR Telepresence | S1-182227 | revised | | | |
| 22.228 | 0229 | - | 16.0.0 | Rel-16 | Add reqs for IMS to support IMS slicing | S1-182111 | revised | | | |
| 22.228 | 0228 | - | 15.2.0 | Rel-16 | Alignment of requirements for access to restricted local operator services | S1-181185 | agreed | SP-180305 | approved | 16.0.0 |
| 22.228 | 0227 | - | 15.2.0 | Rel-15 | Alignment of requirements for access to restricted local operator services | S1-181181 | agreed | SP-180305 | approved | 15.3.0 |
| 22.228 | 0226 | - | 15.2.0 | Rel-16 | IMS support for service visibility and usage | S1-181097 | noted | | | |
| 22.228 | 0225 | 1 | 15.2.0 | Rel-16 | IMS support for services using AI (voiceprint) | S1-181437 | noted | | | |
| 22.228 | 0225 | - | 15.2.0 | Rel-16 | IMS support for services using AI (voiceprint) | S1-181096 | revised | | | |
| 22.228 | 0224 | 1 | 15.2.0 | Rel-16 | Support for one to many communication | S1-181436 | withdrawn | | | |
| 22.228 | 0224 | - | 15.2.0 | Rel-16 | Support for one to many communication | S1-181095 | revised | | | |
| 22.228 | 0223 | 2 | 15.2.0 | Rel-16 | Interworking with non-sip devices (camera) | S1-181721 | withdrawn | | | |
| 22.228 | 0223 | 1 | 15.2.0 | Rel-16 | Interworking with non-sip devices (camera) | S1-181435 | revised | | | |
| 22.228 | 0223 | - | 15.2.0 | Rel-16 | Interworking with non-sip devices (camera) | S1-181094 | revised | | | |
| 22.228 | 0222 | 1 | 15.2.0 | Rel-16 | IMS support for VR Telepresence | S1-181434 | withdrawn | | | |
| 22.228 | 0222 | - | 15.2.0 | Rel-16 | IMS support for VR Telepresence | S1-181093 | revised | | | |
| 22.228 | 0221 | 1 | 15.2.0 | Rel-16 | IMS support for Augmented Reality | S1-181433 | withdrawn | | | |
| 22.228 | 0221 | - | 15.2.0 | Rel-16 | IMS support for Augmented Reality | S1-181092 | revised | | | |
| 22.228 | 0220 | 2 | 15.2.0 | Rel-16 | IMS support for Group Communication fast call set up time | S1-181720 | agreed | SP-180311 | reissued | 16.0.0 |
| 22.228 | 0220 | 2 | 15.2.0 | Rel-16 | IMS support for Group Communication fast call set up time | S1-181720 | agreed | SP-180464 | approved | 16.0.0 |
| 22.228 | 0220 | 1 | 15.2.0 | Rel-16 | IMS support for Group Communication fast call set up time | S1-181432 | revised | | | |
| 22.228 | 0220 | - | 15.2.0 | Rel-16 | IMS support for Group Communication fast call set up time | S1-181091 | revised | | | |
| 22.228 | 0219 | 2 | 15.2.0 | Rel-16 | IMS Network Slicing | S1-181630 | withdrawn | | | |
| 22.228 | 0219 | 1 | 15.2.0 | Rel-16 | IMS Network Slicing | S1-181431 | revised | | | |
| 22.228 | 0219 | - | 15.2.0 | Rel-16 | IMS Network Slicing | S1-181090 | revised | | | |
| 22.228 | 0218 | 1 | 15.1.0 | Rel-15 | Remove restricted local operator services definition | S1-173453 | agreed | SP-170694 | approved | 15.2.0 |
| 22.228 | 0218 | - | 15.1.0 | Rel-15 | Remove restricted local operator services definition | S1-173024 | revised | | | |
| 22.228 | 0217 | 2 | 15.0.0 | Rel-15 | Requirements for access to restricted local operator services | S1-172383 | agreed | SP-170447 | approved | 15.1.0 |
| 22.228 | 0217 | 1 | 15.0.0 | Rel-15 | Requirements for access to restricted local operator services | S1-172236 | revised | | | |
| 22.228 | 0217 | - | 15.0.0 | Rel-15 | Requirements for access to restricted local operator services | S1-172120 | revised | | | |
| 22.228 | 0216 | - | 15.0.0 | Rel-15 | Providing IMS subscriber's call state to applications | S1-172112 | noted | | | |
| 22.228 | 0215 | 1 | 15.0.0 | Rel-15 | CR to 22.228 spoofed call detection | S1-170195 | noted | | | |
| 22.228 | 0215 | - | 15.0.0 | Rel-15 | CR to 22.228 spoofed call detection | S1-170103 | revised | | | |
| 22.228 | 0214 | 1 | 14.0.0 | Rel-14 | Presentation of the results of spoofed call detection to the terminating user. | S1-163215 | agreed | SP-160897 | approved | 14.1.0 |
| 22.228 | 0214 | - | 14.0.0 | Rel-14 | Presentation of the results of spoofed call detection to the terminating user. | S1-163062 | revised | | | |
| 22.228 | 0213 | 1 | 13.3.0 | Rel-15 | Presentation of the results of spoofed call detection to the terminating user. | S1-162272 | agreed | SP-160547 | approved | 15.0.0 |
| 22.228 | 0213 | - | 13.3.0 | Rel-15 | Presentation of the results of spoofed call detection to the terminating user. | S1-162107 | revised | | | |
| 22.228 | 0212 | 1 | 13.2.0 | Rel-13 | Codecs for WebRTC | S1-151465 | agreed | SP-150268 | approved | 13.3.0 |
| 22.228 | 0212 | - | | Rel-13 | Codecs for WebRTC | S1-151202 | | | | |
| 22.228 | 0211 | 1 | 12.9.0 | Rel-12 | Codecs for WebRTC | S1-151464 | agreed | SP-150268 | approved | 12.10.0 |
| 22.228 | 0211 | - | | Rel-12 | Codecs for WebRTC | S1-151201 | | | | |
| 22.228 | 0210 | - | | Rel-13 | CR linked to S1-150188 | S1-150213 | withdrawn | | | |
| 22.228 | 0209 | 3 | 13.1.0 | Rel-13 | Clean up from business trunking transfer | S1-144523 | | SP-140842 | rejected | |
| 22.228 | 0209 | 2 | 13.1.0 | Rel-13 | Clean up from business trunking transfer | S1-144523 | agreed | SP-140748 | approved | 13.2.0 |
| 22.228 | 0208 | 3 | 12.8.0 | Rel-12 | Clean up from business trunking transfer | S1-144522 | | SP-140842 | rejected | |
| 22.228 | 0208 | 2 | 12.8.0 | Rel-12 | Clean up from business trunking transfer | S1-144522 | agreed | SP-140748 | approved | 12.9.0 |
| 22.228 | 0206 | 1 | 13.0.0 | Rel-13 | NAT Traversal in WebRTC | S1-143503 | agreed | SP-140504 | approved | 13.1.0 |
| 22.228 | 0205 | 1 | 13.0.0 | Rel-13 | Completing the transfer of business trunking support to 3GPP | S1-143494 | agreed | SP-140499 | approved | 13.1.0 |
| 22.228 | 0204 | 1 | 12.7.0 | Rel-12 | Completing the transfer of business trunking support to 3GPP | S1-143488 | agreed | SP-140499 | approved | 12.8.0 |
| 22.228 | 0203 | 2 | 12.6.0 | Rel-12 | Clarification on the use of codecs by the WebRTC IMS client | S1-141599 | agreed | SP-140225 | approved | 12.7.0 |
| 22.228 | 0201 | 1 | 12.6.0 | Rel-12 | Alignment of IMS WebRTC stage 1 Authentication with stage 2 | S1-141429 | agreed | SP-140223 | approved | 12.7.0 |
| 22.228 | 0200 | 1 | 12.6.0 | Rel-12 | Alignment of IMS WebRTC stage 1 with stage 2 | S1-141428 | agreed | SP-140223 | approved | 12.7.0 |
| 22.228 | 0199 | 2 | 12.6.0 | Rel-13 | Use of differentiated paging for incoming voice over E-UTRAN services | S1-141575 | agreed | SP-140236 | approved | 13.0.0 |
| 22.228 | 0198 | 2 | 12.6.0 | Rel-13 | Support for end to end WebRTC bearer support over IMS | S1-141532 | agreed | SP-140230 | approved | 13.0.0 |
| 22.228 | 0197 | 2 | 12.6.0 | Rel-13 | Use case for end to end WebRTC bearer support over IMS | S1-141531 | agreed | SP-140230 | approved | 13.0.0 |
| 22.228 | 0196 | 3 | 12.5.0 | Rel-12 | Support of WebRTC client access to IMS | S1-133304 | agreed | SP-130200 | approved | 12.6.0 |
| 22.228 | 0188 | 1 | 12.4.0 | Rel-12 | Language and Modality Information for communications | S1-131213 | agreed | SP-130107 | approved | 12.5.0 |
| 22.228 | 0180 | 1 | 12.3.0 | Rel-12 | Removal of operator initiated IMS registration | S1-124449 | agreed | SP-120864 | approved | 12.4.0 |
| 22.228 | 0179 | 1 | 11.5.0 | Rel-11 | Removal of operator initiated IMS registration | S1-124448 | agreed | SP-120864 | approved | 11.6.0 |
| 22.228 | 0178 | 1 | 10.4.1 | Rel-10 | Removal of operator initiated IMS registration | S1-124447 | agreed | SP-120864 | approved | 10.5.0 |
| 22.228 | 0177 | 1 | 9.3.0 | Rel-9 | Removal of operator initiated IMS registration | S1-124446 | agreed | SP-120864 | approved | 9.4.0 |
| 22.228 | 0176 | 1 | 8.6.0 | Rel-8 | Removal of operator initiated IMS registration | S1-124445 | agreed | SP-120864 | approved | 8.7.0 |
| 22.228 | 0174 | 2 | 12.2.0 | Rel-12 | IMS support for Push Notification Service | S1-122502 | agreed | SP-120534 | approved | 12.3.0 |
| 22.228 | 0172 | 2 | 12.2.0 | Rel-12 | IMS registration control based on location information | S1-122500 | agreed | SP-120532 | approved | 12.3.0 |
| 22.228 | 0171 | 1 | 12.2.0 | Rel-12 | IP-PBXs in static mode of operation | S1-122438 | agreed | SP-120530 | approved | 12.3.0 |
| 22.228 | 0170 | 1 | 12.2.0 | Rel-12 | Adding TISPAN reference on national interconnect | S1-122355 | agreed | SP-120527 | approved | 12.3.0 |
| 22.228 | 0169 | 1 | 12.2.0 | Rel-12 | Definition of DVB-RCS2 as an access network for IMS | S1-122354 | agreed | SP-120531 | approved | 12.3.0 |
| 22.228 | 0168 | 3 | 12.2.0 | Rel-12 | IMS interconnect with non-IMS based networks | S1-122486 | agreed | SP-120527 | approved | 12.3.0 |
| 22.228 | 0167 | - | 12.1.0 | Rel-12 | Clarification of Telepresence Requirements | S1-121151 | agreed | SP-120290 | approved | 12.2.0 |
| 22.228 | 0166 | - | 11.4.0 | Rel-11 | Removal of INIPUI Requirements from Rel-11 | S1-121122 | agreed | SP-120293 | approved | 11.5.0 |
| 22.228 | 0165 | 1 | 12.1.0 | Rel-12 | Additional Display Requirements | S1-121404 | agreed | SP-120290 | approved | 12.2.0 |
| 22.228 | 0164 | - | 12.1.0 | Rel-12 | Additional Interworking Requirement | S1-121067 | agreed | SP-120290 | approved | 12.2.0 |
| 22.228 | 0163 | 1 | 12.1.0 | Rel-12 | Addition of definition for Telepresence System | S1-121407 | agreed | SP-120290 | approved | 12.2.0 |
| 22.228 | 0162 | 1 | 12.1.0 | Rel-12 | Corrections and enhancements for Telepresence | S1-121399 | agreed | SP-120290 | approved | 12.2.0 |
| 22.228 | 0161 | 1 | 12.0.0 | Rel-12 | IMS interconnect requirements for national interconnect | S1-120139 | agreed | SP-120106 | approved | 12.1.0 |
| 22.228 | 0159 | 1 | 12.0.0 | Rel-12 | Interworking requirements for Telepresence | S1-120279 | agreed | SP-120101 | approved | 12.1.0 |
| 22.228 | 0158 | - | 12.0.0 | Rel-12 | Addition of interconnection diagram to the Telepresence use case | S1-120080 | agreed | SP-120101 | approved | 12.1.0 |
| 22.228 | 0157 | 1 | 12.0.0 | Rel-12 | Interoperability requirements for Telepresence | S1-120278 | agreed | SP-120101 | approved | 12.1.0 |
| 22.228 | 0156 | 3 | 12.0.0 | Rel-12 | Clarification of Telepresence Requirements | S1-120300 | agreed | SP-120101 | approved | 12.1.0 |
| 22.228 | 0155 | 1 | 11.4.0 | Rel-12 | INIPUI Address Resolution | S1-113325 | agreed | SP-110816 | approved | 12.0.0 |
| 22.228 | 0154 | 1 | 11.4.0 | Rel-12 | IMS-Based Telepresence Definition | S1-113318 | agreed | SP-110814 | approved | 12.0.0 |
| 22.228 | 0151 | 1 | 11.4.0 | Rel-12 | Requirements for IMS-Based Telepresence | S1-113324 | agreed | SP-110814 | approved | 12.0.0 |
| 22.228 | 0150 | 2 | 11.4.0 | Rel-12 | Use Case for IMS-Based Telepresence | S1-113322 | agreed | SP-110814 | approved | 12.0.0 |
| 22.228 | 0149 | - | 11.3.0 | Rel-11 | Re-introduction of an approved high level requirement | S1-112026 | agreed | SP-110582 | approved | 11.4.0 |
| 22.228 | 0147 | 1 | 11.3.0 | Rel-11 | Clarification of UE for VINE | S1-112373 | agreed | SP-110580 | reissued | |
| 22.228 | 0147 | 1 | 11.3.0 | Rel-11 | Clarification of UE for VINE | - | | SP-110632 | approved | 11.4.0 |
| 22.228 | 0145 | 1 | 11.2.0 | Rel-11 | New annex for VINE reference model | S1-111390 | agreed | SP-110375 | approved | 11.3.0 |
| 22.228 | 0144 | 4 | 11.2.0 | Rel-11 | Voice Interworking with Enterprise IP-PBX (VINE) Requirements | S1-111396 | agreed | SP-110375 | approved | 11.3.0 |
| 22.228 | 0143 | 2 | 11.2.0 | Rel-11 | FW traversal support in Common IMS | S1-111354 | agreed | SP-110376 | approved | 11.3.0 |
| 22.228 | 0142 | 2 | 11.3.0 | Rel-11 | Information of called party for INIPUI | S1-112192 | agreed | SP-110581 | approved | 11.4.0 |
| 22.228 | 0141 | 2 | 11.1.1 | Rel-11 | IUT Privacy considerations associated with remote end user and restricting copyrighted content. | S1-110428 | | SP-110172 | approved | 11.2.0 |
| 22.228 | 0139 | - | 11.1.1 | Rel-11 | Editorial change to figure 10.3 and 10.4 Clause 10.1 | S1-110074 | | SP-110164 | approved | 11.2.0 |
| 22.228 | 0136 | 1 | 10.3.0 | Rel-10 | Alignment of shared control of media components requirements | S1-103326 | agreed | SP-100797 | approved | 10.4.0 |
| 22.228 | 0135 | 2 | 11.0.0 | Rel-11 | Additions to IMS application services across IMS-NNI | S1-103200 | agreed | SP-100799 | approved | 11.1.0 |
| 22.228 | 0133 | - | 11.0.0 | Rel-11 | Conferencing Support in a VPLMN | S1-103009 | agreed | SP-100803 | approved | 11.1.0 |
| 22.228 | 0132 | 2 | 10.2.0 | Rel-11 | IMS application services across IMS-NNI | S1-102407 | agreed | SP-100581 | approved | 11.0.0 |
| 22.228 | 0131 | - | 9.2.0 | Rel-9 | Removal of references to 3GPP OSA | S1-102052 | agreed | SP-100575 | approved | 9.3.0 |
| 22.228 | 0130 | - | 10.2.0 | Rel-10 | Removal of references to 3GPP OSA | S1-102053 | agreed | SP-100575 | approved | 10.3.0 |
| 22.228 | 0129 | - | 9.2.0 | Rel-9 | Unsolicited communication alignment with SA3 | S1-102094 | agreed | SP-100574 | approved | 9.3.0 |
| 22.228 | 0127 | 1 | 10.2.0 | Rel-10 | Alignment of Transfer of Control requirements | S1-102387 | agreed | SP-100577 | approved | 10.3.0 |
| 22.228 | 0126 | 3 | 11.2.0 | Rel-11 | IMS Network-Independent Public User Identities | S1-111346 | agreed | SP-110379 | approved | 11.3.0 |
| 22.228 | 0124 | 2 | 10.1.0 | Rel-10 | Inclusion of an IETF reference for IUT | S1-094285 | | SP-090847 | approved | 10.2.0 |
| 22.228 | 0122 | - | 10.1.0 | Rel-10 | Add support for the mailto scheme to IMS | S1-094129 | | SP-090846 | approved | 10.2.0 |
| 22.228 | 0121 | 2 | 10.1.0 | Rel-10 | IMS-Unallocated identity handling | S1-094282 | | SP-090846 | approved | 10.2.0 |
| 22.228 | 0120 | 2 | 10.1.0 | Rel-10 | Request information of a called party | S1-094280 | | SP-090846 | approved | 10.2.0 |
| 22.228 | 0119 | 1 | 10.1.0 | Rel-10 | Announcement towards the terminating user | S1-094481 | | SP-090846 | approved | 10.2.0 |
| 22.228 | 0116 | 3 | 10.1.0 | Rel-10 | Clarification to IUT service control requirement | S1-094279 | | SP-090847 | approved | 10.2.0 |
| 22.228 | 0114 | - | 9.1.0 | Rel-9 | Add the feature of completing dialed number to global form | - | | SP-090494 | approved | 9.2.0 |
| 22.228 | 0113 | 3 | 10.0.0 | Rel-10 | Receiving the original destination identity | S1-093296 | agreed | SP-090483 | approved | 10.1.0 |
| 22.228 | 0109 | 3 | 10.0.0 | Rel-10 | Add the feature of completing dialed number to global form | - | | SP-090660 | approved | 10.1.0 |
| 22.228 | 0109 | 2 | 10.0.0 | Rel-10 | Add the feature of completing dialed number to global form | S1-093284 | agreed | SP-090483 | revised | |
| 22.228 | 0107 | 2 | 9.1.0 | Rel-9 | Correction of IUT requirement in Rel-9 | S1-093293 | | SP-090651 | approved | 9.2.0 |
| 22.228 | 0107 | 2 | 9.1.0 | Rel-9 | Correction of IUT requirement in Rel-9 | S1-093293 | agreed | SP-090481 | reissued | |
| 22.228 | 0105 | 2 | 10.0.0 | Rel-10 | Use Case for video replication | S1-093291 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0105 | 2 | 10.0.0 | Rel-10 | Use Case for video replication | S1-093291 | agreed | SP-090481 | reissued | |
| 22.228 | 0103 | 3 | 10.0.0 | Rel-10 | Transfer of Control / Media Replication requirements | S1-093379 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0103 | 3 | 10.0.0 | Rel-10 | Transfer of Control / Media Replication requirements | S1-093379 | agreed | SP-090482 | reissued | |
| 22.228 | 0102 | 2 | 10.0.0 | Rel-10 | Shared Control of media flows across multiple UEs | S1-093475 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0102 | 2 | 10.0.0 | Rel-10 | Shared Control of media flows across multiple UEs | S1-093475 | agreed | SP-090482 | reissued | |
| 22.228 | 0101 | 2 | 10.0.0 | Rel-10 | Clarification of session setup / modification requirements | S1-093378 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0101 | 2 | 10.0.0 | Rel-10 | Clarification of session setup / modification requirements | S1-093378 | agreed | SP-090482 | reissued | |
| 22.228 | 0100 | 2 | 10.0.0 | Rel-10 | Use Case for Media Replication | S1-093375 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0100 | 2 | 10.0.0 | Rel-10 | Use Case for Media Replication | S1-093375 | agreed | SP-090482 | reissued | |
| 22.228 | 0099 | 3 | 10.0.0 | Rel-10 | Use Case for Shared Control of session across Multiple IMS users | S1-093292 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0099 | 3 | 10.0.0 | Rel-10 | Use Case for Shared Control of session across Multiple IMS users | S1-093292 | agreed | SP-090481 | reissued | |
| 22.228 | 0098 | 3 | 10.0.0 | Rel-10 | Use Cases for Transfer of Control | S1-093373 | | SP-090652 | approved | 10.1.0 |
| 22.228 | 0098 | 3 | 10.0.0 | Rel-10 | Use Cases for Transfer of Control | S1-093373 | agreed | SP-090482 | reissued | |
| 22.228 | 0089 | 2 | 10.0.0 | Rel-10 | Add the feature of completing dialed number to global form | S1-091296 | agreed | SP-090378 | postponed | |
| 22.228 | 0088 | 1 | 9.0.0 | Rel-9 | IUT beetween an IP CAN and 3GPP CS Domain | S1-090341 | agreed | SP-090084 | approved | 9.1.0 |
| 22.228 | 0087 | 3 | 9.0.0 | Rel-10 | Requirements for a focus aware conference users before leaving the conference | S1-090340 | agreed | SP-090086 | approved | 10.0.0 |
| 22.228 | 0085 | 1 | 9.0.0 | Rel-9 | IMS IDT Inter UE Transfer Service Requirements | S1-090185 | agreed | SP-090084 | approved | 9.1.0 |
| 22.228 | 0084 | 2 | 8.5.0 | Rel-9 | Service requirements for Prevention of Unsolicited Communication in IMS (PUCI) | S1-084406 | agreed | SP-080782 | approved | 9.0.0 |
| 22.228 | 0080 | 2 | 8.4.0 | Rel-9 | IMS IDT Inter UE Transfer Service Requirements | S1-084215 | agreed | SP-080780 | approved | 9.0.0 |
| 22.228 | 0079 | 2 | 8.4.0 | Rel-9 | IMS IDT - Inter UE Transfer - Definitions | S1-084416 | agreed | SP-080780 | approved | 9.0.0 |
| 22.228 | 0077 | - | 8.5.0 | Rel-8 | Correction of wrong reference | S1-084052 | agreed | SP-080775 | approved | 8.6.0 |
| 22.228 | 0075 | 1 | 8.5.0 | Rel-8 | IMS Credentials requirements | S1-083442 | agreed | SP-080769 | approved | 8.6.0 |
| 22.228 | 0070 | 2 | 8.4.0 | Rel-8 | Service Requirements for Common IMS | S1-080610 | agreed | SP-080298 | approved | 8.5.0 |
| 22.228 | 0069 | 1 | 8.3.0 | Rel-8 | Clarification of requirements for IMS interconnection | S1-080328 | | SP-080040 | approved | 8.4.0 |
| 22.228 | 0068 | - | 8.3.0 | Rel-8 | Emergency communication for fixed NGN | S1-080183 | | SP-080031 | approved | 8.4.0 |
| 22.228 | 0067 | 1 | 8.3.0 | Rel-8 | Additional requirements for IMS interconnection | S1-080238 | | SP-080040 | approved | 8.4.0 |
| 22.228 | 0066 | 3 | 8.3.0 | Rel-8 | Corrections to Interworking with PSTN/ISDN networks | - | | SP-080205 | approved | 8.4.0 |
| 22.228 | 0066 | 2 | 8.3.0 | Rel-8 | Corrections to Interworking with PSTN/ISDN networks | - | | SP-080193 | revised | |
| 22.228 | 0066 | 1 | 8.3.0 | Rel-8 | Corrections to Interworking with PSTN/ISDN networks | S1-080176 | | SP-080031 | revised | |
| 22.228 | 0064 | 2 | 8.3.0 | Rel-8 | Removal of abbreviations and definitions already included in 21.905 | S1-080167 | | SP-080031 | approved | 8.4.0 |
| 22.228 | 0063 | 1 | 8.2.0 | Rel-8 | Corrections based on LS from TISPAN and Action from SA Plenary | S1-071866 | | SP-070844 | approved | 8.3.0 |
| 22.228 | 0062 | 4 | 8.3.0 | Rel-8 | Enhancements on access to the IMS | S1-080184 | | SP-080031 | approved | 8.4.0 |
| 22.228 | 0060 | 1 | 8.2.0 | Rel-8 | Any IP version support | S1-071780 | | SP-070844 | approved | 8.3.0 |
| 22.228 | 0059 | 2 | 8.2.0 | Rel-8 | IMS Interconnection requirement | S1-071926 | | SP-070862 | approved | 8.3.0 |
| 22.228 | 0056 | 1 | 8.2.0 | Rel-8 | Corrections to definition of ôAccess Independenceö | S1-071684 | | SP-070844 | approved | 8.3.0 |
| 22.228 | 0054 | 1 | 8.2.0 | Rel-8 | NAT support in Common IMS | S1-071683 | | SP-070844 | approved | 8.3.0 |
| 22.228 | 0053 | 1 | 8.2.0 | Rel-8 | Optimal Media Routing Support for IMS Sessions | S1-071924 | | SP-070862 | approved | 8.3.0 |
| 22.228 | 0049 | 1 | 8.2.0 | Rel-8 | User determined user busy | S1-071787 | | SP-070846 | approved | 8.3.0 |
| 22.228 | 0048 | 1 | 8.5.0 | Rel-8 | Requirements for capability enabling early media | S1-083215 | agreed | SP-080775 | approved | 8.6.0 |
| 22.228 | 0048 | - | 8.1.0 | Rel-8 | TISPAN Service and Capability requirements for Common IMS | S1-071294 | agreed | SP-070658 | approved | 8.2.0 |
| 22.228 | 0047 | 2 | 8.1.0 | Rel-8 | Identification of a specific UE when multiple UEs share a single Public User Identity (to TS 22.228 Rel-8) | S1-070991 | agreed | SP-070657 | approved | 8.2.0 |
| 22.228 | 0046 | 2 | 7.5.0 | Rel-7 | Identification of a specific UE when multiple UEs share a single Public User Identity (to TS 22.228 Rel-7) | S1-070990 | agreed | SP-070657 | approved | 7.6.0 |
| 22.228 | 0045 | - | 8.0.0 | Rel-8 | Requirements to support SMS/EMS/MMS in IMS | S1-060909 | agreed | SP-060469 | postponed | |
| 22.228 | 0044 | - | 7.4.0 | Rel-7 | Requirements for supporting SMS/EMS/MMS in IMS | S1-060908 | agreed | SP-060469 | postponed | |
| 22.228 | 0043 | - | 8.0.0 | Rel-8 | Support of local numbers in the IMS - clarification and corrections | S1-060855 | agreed | SP-060463 | approved | 8.1.0 |
| 22.228 | 0042 | - | 7.4.0 | Rel-7 | Support of local numbers in the IMS - clarification and corrections | S1-060854 | agreed | SP-060463 | approved | 7.5.0 |
| 22.228 | 0041 | 2 | 7.3.0 | Rel-7 | Support of Local Numbers in the IMS | - | | SP-060432 | approved | 7.4.0 |
| 22.228 | 0041 | 1 | 7.3.0 | Rel-7 | Support of Local Numbers in the IMS | - | | SP-060364 | revised | |
| 22.228 | 0041 | - | 7.3.0 | Rel-7 | Support of Local Numbers in the IMS | S1-060625 | agreed | SP-060303 | revised | |
| 22.228 | 0040 | - | 7.3.0 | Rel-8 | Network requested IMS session initiation | S1-060611 | agreed | SP-060323 | approved | 8.0.0 |
| 22.228 | 0039 | - | 7.3.0 | Rel-7 | Identification of communication services, AI30-06 | S1-060560 | agreed | SP-060317 | approved | 7.4.0 |
| 22.228 | 0038 | - | 6.10.0 | Rel-6 | Removal of requirement to redirect based on individual media | S1-060293 | agreed | SP-060017 | approved | 6.11.0 |
| 22.228 | 0037 | - | 5.6.0 | Rel-5 | Removal of requirement to redirect based on individual media | S1-060292 | agreed | SP-060017 | approved | 5.7.0 |
| 22.228 | 0036 | - | 7.2.0 | Rel-7 | Clarify multiple applications per service | S1-051232 | agreed | SP-050752 | approved | 7.3.0 |
| 22.228 | 0035 | - | 7.2.0 | Rel-7 | Ability for a service to address a user on a unique UE in an IMS system when multiple UEs are registered with the same IMS Public User Identity | S1-051150 | agreed | SP-050748 | approved | 7.3.0 |
| 22.228 | 0035 | - | 7.1.0 | Rel-7 | CS-IMS multimedia service interworking | S1-050941 | agreed | SP-050531 | approved | 7.2.0 |
| 22.228 | 0034 | - | 7.1.0 | Rel-7 | Allowing IMS to use multicast capabilities of the network | S1-050882 | agreed | SP-050510 | approved | 7.2.0 |
| 22.228 | 0033 | - | 7.1.0 | Rel-7 | Removal of Local Services | S1-050778 | agreed | SP-050511 | approved | 7.2.0 |
| 22.228 | 0032 | - | 6.9.0 | Rel-6 | Removal of Local Services | S1-050777 | agreed | SP-050511 | approved | 6.10.0 |
| 22.228 | 0031 | - | 6.8.0 | Rel-6 | Requirements for the handling of SIP URIs with Presence or IM prefixes | S1-050452 | agreed | SP-050217 | approved | 6.9.0 |
| 22.228 | 0030 | - | 7.0.0 | Rel-7 | Removal of Reference to TS 22.121 | S1-050253 | agreed | SP-050059 | approved | 7.1.0 |
| 22.228 | 0029 | 3 | 16.0.0 | Rel-16 | Add reqs for IMS to support IMS partitioning | S1-182716 | noted | | | |
| 22.228 | 0029 | 2 | 16.0.0 | Rel-16 | Add reqs for IMS to support IMS slicing | S1-182547 | revised | | | |
| 22.228 | 0029 | 1 | 16.0.0 | Rel-16 | Add reqs for IMS to support IMS slicing | S1-182521 | revised | | | |
| 22.228 | 0029 | - | 7.0.0 | Rel-7 | Tel-URI related reference update | S1-050173 | agreed | SP-050060 | approved | 7.1.0 |
| 22.228 | 0028 | - | 6.7.0 | Rel-6 | Tel-URI related reference update | S1-050172 | agreed | SP-050060 | approved | 6.8.0 |
| 22.228 | 0027 | - | 6.7.0 | Rel-6 | Removal of Reference to TS 22.121 | S1-050220 | agreed | SP-050059 | approved | 6.8.0 |
| 22.228 | 0026 | - | 6.6.0 | Rel-6 | IMS Support of CS services | S1-040998 | agreed | SP-040729 | approved | 6.7.0 |
| 22.228 | 0025 | - | 6.6.0 | Rel-7 | Requirements for the handling of SIP URIs with Presence or IM prefixes | S1-040717 | agreed | SP-040511 | approved | 7.0.0 |
| 22.228 | 0024 | - | 6.5.0 | Rel-6 | Editorial Correction of R5 reference | S1-040538 | agreed | SP-040292 | approved | 6.6.0 |
| 22.228 | 0023 | - | 6.5.0 | Rel-6 | Deletion of duplicated scenarios of Annex A | S1-040517 | agreed | SP-040293 | approved | 6.6.0 |
| 22.228 | 0022 | - | 6.4.0 | Rel-6 | Multi terminal requirement in 22.228 | S1-031314 | agreed | SP-030706 | approved | 6.5.0 |
| 22.228 | 0021 | - | 6.3.0 | Rel-6 | Clarification on the meaning of Access Independence | S1-030906 | agreed | SP-030465 | approved | 6.4.0 |
| 22.228 | 0020 | - | 6.2.0 | Rel-6 | Addition of requirements to IMS to enable conference-like services | S1-030523 | agreed | SP-030259 | approved | 6.3.0 |
| 22.228 | 0019 | - | 6.2.0 | Rel-6 | Multiple UEs in IMS service subscription | S1-030522 | agreed | SP-030259 | approved | 6.3.0 |
| 22.228 | 0018 | - | 6.1.0 | Rel-6 | GUP for IMS subscription management | S1-030182 | agreed | SP-030028 | approved | 6.2.0 |
| 22.228 | 0017 | - | 6.0.0 | Rel-6 | IMS interworking | S1-021771 | agreed | SP-020562 | approved | 6.1.0 |
| 22.228 | 0016 | - | 5.5.0 | Rel-6 | Revised version of S1-020846: Editorial for REL6 | S1-021162 | agreed | SP-020258 | approved | 6.0.0 |