Go to spec numbering scheme page
3GPP Specification Change Request records for: 32.421
CR no. | rev | cat | Release | CR written to vers | new vers | CR title | TSG meeting | TSG doc | TSG status | source | WG meeting | WG doc | WG status | cover date | work item | remarks | database record created |
0001 | - | F | Rel-6 | 6.0.0 | 6.1.0 | Corrections to Trace requirements - alignment with SA2's 23.002 | SP-19 | SP-030147 | approved | S5 | S5-33 | S5-038139 | Agreed | 2003-02-28 | OAM-Trace | - | 2003-03-12 |
0002 | - | F | Rel-6 | 6.1.0 | 6.2.0 | Correction of IMS subscriber identification for Trace | SP-22 | SP-030612 | approved | S5 | S5-36 | S5-032712 | Agreed | 2003-11-21 | OAM-Trace | - | 2004-01-05 |
0003 | - | F | Rel-6 | 6.2.0 | 6.3.0 | Correction in Trace high level architecture | SP-23 | SP-040116 | approved | S5 | S5-37 | S5-042156 | Agreed | 2004-02-27 | OAM-Trace | - | 2004-03-05 |
0004 | - | F | Rel-6 | 6.3.0 | 6.4.0 | Removal of GERAN from Rel-6 32.42x series of Trace specifications | SP-25 | SP-040542 | approved | S5 | S5-39 | S5-042534 | Agreed | 2004-08-20 | OAM-Trace | - | 2004-09-13 |
0005 | - | C | Rel-6 | 6.4.0 | 6.5.0 | Remove requirement for having ASN.1 as Trace record format | SP-26 | SP-040770 | approved | S5 | S5-40 | S5-042737 | Agreed | 2004-11-20 | OAM-Trace | - | 2004-11-25 |
0006 | - | C | Rel-6 | 6.4.0 | 6.5.0 | Remove in Rel-6 the signalling based Trace in IMS due to missing SIP signalling support from CN1/IETF | SP-26 | SP-040770 | approved | S5 | S5-40 | S5-042743 | Agreed | 2004-11-20 | OAM-Trace | - | 2004-11-25 |
0007 | - | F | Rel-6 | 6.5.0 | 6.6.0 | Remove ambiguity on the file format for trace data at the Network Elemets (NEs) | SP-27 | SP-050043 | approved | S5 | S5-41 | S5-058148 | Agreed | 2005-01-28 | OAM-Trace | - | 2005-02-07 |
0008 | - | F | Rel-6 | 6.5.0 | 6.6.0 | Correction to the Scope | SP-27 | SP-050043 | approved | S5 | S5-41 | S5-058153 | Agreed | 2005-01-28 | OAM-Trace | - | 2005-02-07 |
0009 | - | F | Rel-6 | 6.5.0 | 6.6.0 | Correct the list of interfaces trace parameter – Align with 32.422 and 32.423 | SP-27 | SP-050043 | approved | S5 | S5-41 | S5-058175 | Agreed | 2005-01-28 | OAM-Trace | - | 2005-02-07 |
0010 | - | B | Rel-6 | 6.6.0 | 6.7.0 | BM-SC Network Element and Gmb interface addition for MBMS tracing | SP-28 | SP-050294 | approved | S5 | S5-42 | S5-058426 | Agreed | 2005-05-13 | OAM-Trace | - | 2005-05-25 |
0011 | - | B | Rel-7 | 6.7.0 | - | Add support for UTRAN TDD - Declare RAT Type | SP-29 | SP-050453 | withdrawn | S5 | S5-43 | S5-058744 | Agreed | 2005-09-02 | OAM7-Trace | Rel-7 OAM7-Trace | 2005-09-15 |
0011 | - | B | Rel-7 | 6.7.0 | 7.0.0 | Add support for UTRAN TDD - Declare RAT Type | SP-29 | SP-050623 | approved | S5 | - | S5-058744 | - | 2005-09-02 | OAM7-Trace | - | 2005-09-28 |
0012 | - | B | Rel-7 | 7.0.0 | 7.1.0 | Introduction of Service Level Tracing for IMS | SP-31 | SP-060100 | approved | S5 | S5-45 | S5-068108 | Agreed | 2006-02-17 | OAM7-Trace | 10.37 | 2006-02-27 |
0013 | - | C | Rel-7 | 7.1.0 | 7.2.0 | Add Cell Traffic Trace capability to 32.421 Trace concepts and requirements | SP-33 | SP-060552 | approved | S5 | S5-48 | S5-060699 | Agreed | 2006-07-07 | OAM7-Trace | - | 2006-09-15 |
0014 | - | C | Rel-8 | 7.2.0 | 8.0.0 | Add extended trace depth to include Vendor Specific Extension (VSE) | SP-37 | SP-070614 | approved | S5 | S5-55 | S5-071619 | agreed | 2007-09-08 | OAM8 | - | 2007-09-12 |
0015 | - | C | Rel-8 | 7.2.0 | 8.0.0 | Add LTE nodes and interfaces | SP-37 | SP-070614 | approved | S5 | S5-55 | S5-071620 | agreed | 2007-09-08 | OAM8 | - | 2007-09-12 |
0016 | - | B | Rel-8 | 8.0.0 | 8.1.0 | Add trace functionality for E-UTRAN | SP-39 | SP-080069 | approved | S5 | S5-57 | S5-080241 | agreed | 2008-01-11 | OAM8 | - | 2008-02-27 |
0017 | - | B | Rel-8 | 8.0.0 | 8.1.0 | Add trace activation failure response | SP-39 | SP-080069 | approved | S5 | S5-58 | S5-080492 | agreed | 2008-02-22 | OAM8 | - | 2008-02-27 |
0018 | - | C | Rel-8 | 8.1.0 | 8.2.0 | Introduction of UE identifiers for trace in E-UTRAN | SP-40 | SP-080329 | approved | S5 | S5-55 | S5-080833 | agreed | 2008-04-25 | OAM8 | - | 2008-05-29 |
0019 | - | C | Rel-8 | 8.2.0 | 8.3.0 | Change the description for Trace Recording Session Reference | SP-41 | SP-080465 | approved | S5 | S5-60 | S5-081260 | agreed | 2008-07-11 | OAM8 | - | 2008-07-11 |
0020 | - | F | Rel-8 | 8.3.0 | 8.4.0 | Correction of trace depth extensions | SP-42 | SP-080846 | approved | S5 | - | S5-081878 | agreed | 2008-10-17 | OAM8 | - | 2008-12-05 |
0021 | - | B | Rel-8 | 8.3.0 | 8.4.0 | Add requirements regarding Trace Recording Session activation failure report to 32.421 | SP-42 | SP-080846 | approved | S5 | - | S5-082471 | agreed | 2008-11-21 | OAM8 | - | 2008-12-05 |
0022 | - | F | Rel-8 | 8.4.0 | 8.5.0 | Add missing Trace Interface for SGSN and HSS list | SP-44 | SP-090289 | approved | S5 | S5-65 | S5-092620 | agreed | 2009-05-25 | OAM8 | - | 2009-06-02 |
0023 | - | F | Rel-8 | 8.5.0 | 8.6.0 | Align the handling of security keys for E-UTRAN with 33.401 | SP-47 | SP-100034 | approved | S5 | S5-70 | S5-101078 | agreed | 2010-03-12 | OAM8-Trace | - | 2010-03-13 |
0024 | - | A | Rel-9 | 9.0.0 | 9.1.0 | Align the handling of security keys for E-UTRAN with 33.401 | SP-47 | SP-100034 | approved | S5 | S5-70 | S5-101079 | agreed | 2010-03-12 | OAM8-Trace | - | 2010-03-13 |
0025 | - | B | Rel-10 | 9.1.0 | 10.0.0 | Adding Requirements for managing UE based network performance measurements | SP-49 | SP-100492 | approved | S5 | S5-73 | S5-102575 | agreed | 2010-09-13 | OAM-PM-UE | - | 2010-09-14 |
0026 | 1 | C | Rel-10 | 10.0.0 | - | Add requirements for trace data of S13, S13’ interfaces | SP-50 | SP-100746 | reissued | S5 | S5-74 | S5-103224 | agreed | 2010-11-07 | OAM10 | - | 2010-12-09 |
0026 | 1 | C | Rel-10 | 10.0.0 | - | Add requirements for trace data of S13, S13’ interfaces | SP-50 | SP-100828 | revised | S5 | S5-74 | S5-103224 | agreed | 2010-11-07 | OAM10 | - | 2010-12-12 |
0026 | 1 | C | Rel-10 | 10.0.0 | 10.1.0 | Add requirements for trace data of S13, S13Æ interfaces | SP-50 | SP-100833 | approved | S5 | - | S5-103224 | - | 2010-11-07 | OAM10 | - | 2010-12-14 |
0027 | 1 | F | Rel-10 | 10.0.0 | - | Correcting the Identification of IMS Subscriber Tracing - Align with 32.422 | SP-50 | SP-100746 | reissued | S5 | S5-74 | S5e100184 | agreed | 2010-11-15 | OAM10 | - | 2010-12-09 |
0027 | 1 | F | Rel-10 | 10.0.0 | - | Correcting the Identification of IMS Subscriber Tracing - Align with 32.422 | SP-50 | SP-100828 | revised | S5 | S5-74 | S5e100184 | agreed | 2010-11-15 | OAM10 | - | 2010-12-12 |
0027 | 1 | F | Rel-10 | 10.0.0 | 10.1.0 | Correcting the Identification of IMS Subscriber Tracing - Align with 32.422 | SP-50 | SP-100833 | approved | S5 | - | S5e100184 | - | 2010-11-15 | OAM10 | - | 2010-12-14 |
0029 | 3 | C | Rel-10 | 10.1.0 | 10.2.0 | Add requirements for security and privacy of UE-based Network Performance Measurements / MDT as required by SA3 (Security) | SP-51 | SP-110102 | approved | S5 | S5-75 | S5-110540 | agreed | 2011-01-27 | OAM-PM-UE | - | 2011-03-17 |
0030 | - | F | Rel-10 | 10.1.0 | 10.2.0 | Change ""UE based network performance measurements"" to ""MDT"" - Align cross-3GPP terminology on MDT work | SP-51 | SP-110102 | approved | S5 | S5-76 | S5-111113 | agreed | 2011-02-18 | OAM-PM-UE | - | 2011-03-17 |
0031 | - | F | Rel-10 | 10.1.0 | - | CR R10 32.421 Add the missing interfaces for EIR | - | - | - | - | S5-76 | S5-111155 | revised | 2011-03-16 | OAM10 | - | 2016-03-11 |
0031 | - | B | Rel-10 | 10.1.0 | 10.2.0 | Add the missing interfaces for EIR | SP-51 | SP-110095 | approved | S5 | S5-76 | S5-111370 | agreed | 2011-03-01 | OAM10 | - | 2011-03-17 |
0032 | - | B | Rel-10 | 10.1.0 | - | CR R10 32 421 clarify and correct requirements | - | - | - | - | S5-76 | S5-111255 | revised | 2011-03-16 | OAM-PM-UE | - | 2016-03-11 |
0032 | 1 | F | Rel-10 | 10.1.0 | 10.2.0 | Clarify and cleanup MDT requirements | SP-51 | SP-110095 | approved | S5 | S5-76 | S5-111349 | agreed | 2011-03-02 | OAM10 | - | 2011-03-17 |
0033 | 1 | B | Rel-11 | 10.2.0 | 11.0.0 | Adding requirements for MDT positioning | SP-53 | SP-110538 | approved | S5 | S5-78 | S5-112679 | agreed | 2011-09-08 | OAM-ePM-UE | - | 2011-09-08 |
0034 | 1 | F | Rel-10 | 10.2.0 | 10.3.0 | MDT for multiple PLMN IDs | SP-53 | SP-110537 | approved | S5 | S5-78 | S5-112663 | agreed | 2011-08-25 | OAM-PM-UE | - | 2011-09-08 |
0035 | - | F | Rel-11 | 10.2.0 | - | MDT for multiple PLMN IDs | SP-53 | SP-110527 | reissued | S5 | S5-78 | S5-112664 | agreed | 2011-08-25 | OAM11 | - | 2011-09-08 |
0035 | - | F | Rel-11 | 10.2.0 | 11.0.0 | MDT for multiple PLMN IDs | SP-53 | SP-110634 | approved | S5 | S5-78 | S5-112664 | agreed | 2011-08-25 | OAM11 | - | 2011-09-20 |
0037 | 2 | B | Rel-11 | 10.2.0 | 11.0.0 | Add MDT location correlation requirements | SP-53 | SP-110538 | approved | S5 | S5-78 | S5-112683 | agreed | 2011-08-25 | OAM-ePM-UE | - | 2011-09-08 |
0038 | 2 | F | Rel-10 | 10.3.0 | 10.4.0 | Introduce the missing MDT data controller user privacy requiremens | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113190 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0039 | 2 | A | Rel-11 | 11.0.0 | 11.1.0 | Introduce the missing MDT data controller user privacy requiremens | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113191 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0044 | 1 | B | Rel-11 | 11.0.0 | 11.1.0 | Add MDT support requirements in RAN sharing scenario | SP-54 | SP-110716 | approved | S5 | S5-80 | S5-113212 | agreed | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0045 | - | F | Rel-10 | 10.3.0 | 10.4.0 | Add MDT data deletion note | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113169 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0046 | 1 | A | Rel-11 | 11.0.0 | 11.1.0 | Add MDT data deletion note | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113194 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0047 | - | B | Rel-11 | 11.0.0 | - | 32.423 R11 Clarification of eNB ID in E-UTRAN Trace Record | - | - | - | S5 | S5-80 | S5-113596 | revised | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0047 | 3 | B | Rel-11 | 11.1.0 | 11.2.0 | Add requirement on reduction of redundant MDT data | SP-55 | SP-120054 | approved | S5 | S5-81 | S5-120321 | agreed | 2012-02-08 | OAM-ePM-UE | - | 2012-02-16 |
0048 | - | B | Rel-11 | 11.0.0 | - | Rel11 CR 32421 use case and requirements for RLF reporting | - | - | - | S5 | S5-80 | S5-113654 | revised | 2011-12-10 | OAM-eUE-PM | - | 2010-12-11 |
0048 | 1 | B | Rel-11 | 11.0.0 | - | Rel11 CR 32421 use case and requirements for RLF reporting | - | - | - | S5 | S5-80 | S5-113829 | revised | 2011-12-10 | OAM-eUE-PM | - | 2010-12-11 |
0048 | 2 | B | Rel-11 | 11.0.0 | 11.1.0 | use case and requirements for RLF reporting | SP-54 | SP-110716 | approved | S5 | S5-80 | S5-113891 | agreed | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0049 | - | B | Rel-11 | 11.0.0 | - | CR 32.421 R11 Add RLF reporting use case and requirements | - | - | - | S5 | S5-80 | S5-113644 | merged in S5-113829 | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0050 | - | F | Rel-10 | 10.3.0 | 10.4.0 | CR R10 32 421 Support multiple cells in area based MDT | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113676 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0051 | - | A | Rel-11 | 11.0.0 | 11.1.0 | CR R11 32 421 Support multiple cells in area based MDT | SP-54 | SP-110715 | approved | S5 | S5-80 | S5-113679 | agreed | 2011-12-10 | OAM-PM-UE | - | 2010-12-11 |
0052 | - | B | Rel-11 | 11.0.0 | - | CR R11 32.421 Add MDT UE selection notification requirements | - | - | - | S5 | S5-80 | S5-113687 | noted | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0053 | - | B | Rel-11 | 11.0.0 | - | CR R11 32.421 Add MDT UE selection criteria requirements | - | - | - | S5 | S5-80 | S5-113688 | noted | 2011-12-10 | OAM-ePM-UE | - | 2010-12-11 |
0054 | 1 | B | Rel-11 | 11.1.0 | 11.2.0 | Add MDT data collection criteria requirements | SP-55 | SP-120054 | approved | S5 | S5-81 | S5-120309 | agreed | 2012-02-08 | OAM-ePM-UE | - | 2012-02-16 |
0055 | - | B | Rel-11 | .. | - | CR R11 32.421 Add use case for centralized ANR | - | - | - | - | S5-82 | S5-120582 | noted | 2012-06-08 | - | - | 2012-06-08 |
0056 | - | B | Rel-11 | .. | - | CR R11 32.421 Add requirements for centralized ANR | - | - | - | - | S5-82 | S5-120583 | noted | 2012-06-08 | - | - | 2012-06-08 |
0057 | - | F | Rel-10 | .. | - | CR 32.421 R10 Remove MDT Country Restriction | - | - | - | - | S5-83 | S5-121055 | revised | 2012-06-08 | - | - | 2012-06-08 |
0057 | 1 | F | Rel-10 | 10.4.0 | 10.5.0 | CR 32.421 R10 Remove MDT Country Restriction | SP-56 | SP-120368 | approved | S5 | S5-83 | S5-121298 | agreed | 2012-06-08 | OAM-PM-UE | - | 2012-06-08 |
0058 | - | A | Rel-11 | .. | - | CR 32.421 R11 Remove MDT Country Restriction | - | - | - | - | S5-83 | S5-121056 | revised | 2012-06-08 | - | - | 2012-06-08 |
0058 | 1 | A | Rel-11 | 11.2.0 | 11.3.0 | CR 32.421 R11 Remove MDT Country Restriction | SP-56 | SP-120368 | approved | S5 | S5-83 | S5-121299 | agreed | 2012-06-08 | OAM-PM-UE | - | 2012-06-08 |
0059 | - | F | Rel-11 | .. | - | CR 32.421 R11 Remove MDT Country Restriction | - | - | - | - | S5-83 | S5-121059 | revised | 2012-06-08 | - | - | 2012-06-08 |
0059 | 1 | F | Rel-11 | 11.2.0 | 11.3.0 | CR 32.421 R11 Remove MDT Country Restriction | SP-56 | SP-120369 | approved | S5 | S5-83 | S5-121327 | agreed | 2012-06-08 | OAM-ePM-UE | - | 2012-06-08 |
0060 | - | - | Rel-11 | .. | - | Rel-11 CR 32.421 Add MDT for Periodical sampling of network performance use case | - | - | - | - | S5-83 | S5-121082 | revised | 2012-06-08 | - | - | 2012-06-08 |
0060 | 1 | B | Rel-11 | 11.2.0 | 11.3.0 | Rel-11 CR 32.421 Add MDT for Periodical sampling of network performance use case | SP-56 | SP-120369 | approved | S5 | S5-83 | S5-121330 | agreed | 2012-06-08 | OAM-ePM-UE | - | 2012-06-08 |
0061 | - | F | Rel-11 | .. | - | CR 32.421 Rel-11 Clarify requirements on counting of distinct UEs | - | - | - | - | S5-84 | S5-121847 | revised | 2012-08-27 | OAM-ePM-UE | - | 2012-08-27 |
0061 | 1 | F | Rel-11 | 11.3.0 | 11.4.0 | Clarify requirements on counting of distinct UEs | SP-57 | SP-120571 | approved | S5 | S5-84 | S5-122130 | agreed | 2012-08-22 | OAM-ePM-UE | - | 2012-09-09 |
0062 | - | - | Rel-11 | .. | - | Rel11 CR 32421 Add RRC Connection Establishment Failure reporting Use Case | - | - | - | - | S5-84 | S5-121853 | postponed | 2012-08-27 | - | - | 2012-08-27 |
0063 | - | - | Rel-11 | .. | - | Rel11 CR 32421 Add RRC Connection Establishment Failure reporting requirements | - | - | - | - | S5-84 | S5-121854 | postponed | 2012-08-27 | - | - | 2012-08-27 |
0064 | - | F | Rel-11 | .. | - | Rel-11 CR 32.421 Correction on the scope, references and abbreviations related to MDT and RLF | - | - | - | - | S5-86 | S5-122887 | revised | 2012-11-24 | OAM-ePM-UE | - | 2012-11-24 |
0064 | 1 | F | Rel-11 | 11.4.0 | 11.5.0 | Correction of the scope and abbreviations related to MDT and RLF | SP-58 | SP-120795 | approved | S5 | S5-86 | S5-123068 | agreed | 2012-11-16 | OAM-ePM-UE | - | 2012-12-10 |
0065 | - | C | Rel-11 | .. | - | CR R11 32.421 Addition of Network Sharing | - | - | - | - | S5-86 | S5-122906 | revised | 2012-11-24 | OAM-ePM-UE | - | 2012-11-24 |
0065 | 1 | C | Rel-11 | 11.4.0 | 11.5.0 | Addition of Network Sharing support | SP-58 | SP-120796 | approved | S5 | S5-86 | S5-123170 | agreed | 2012-11-27 | OAM-ePM-UE | written to wrong version of spec | 2012-12-10 |
0066 | - | - | - | .. | - | CR 32.421 Add IMEI-TAC usecase for UMTS and LTE area based MDT | - | - | - | - | S5-87 | S5-130321 | revised | 2013-02-28 | - | - | 2013-02-28 |
0066 | 1 | F | Rel-11 | 11.5.0 | 11.6.0 | CR 32.421 Add IMEI-TAC usecase for UMTS and LTE area based MDT | SP-59 | SP-130048 | approved | S5 | S5-87 | S5-130298 | agreed | 2013-02-28 | OAM11 | - | 2013-02-28 |
0067 | - | F | Rel-7 | 7.2.0 | - | Rel-7 CR 32421 Remove IMS Service Level Trace | SP-60 | SP-130264 | reissued | S5 | S5-88 | S5-130499 | agreed | 2013-05-15 | OAM7-Trace | - | 2013-05-15 |
0067 | - | F | Rel-7 | 7.2.0 | 7.3.0 | Removal of IMS Service Level Trace feature | SP-60 | SP-130302 | approved | S5 | - | S5-130499 | - | 2013-04-02 | OAM7-Trace | - | 2013-06-17 |
0068 | - | A | Rel-8 | 8.6.0 | - | Rel-8 CR 32421 Remove IMS Service Level Trace | SP-60 | SP-130264 | reissued | S5 | S5-88 | S5-130500 | agreed | 2013-05-15 | OAM7-Trace | - | 2013-05-15 |
0068 | - | A | Rel-8 | 8.6.0 | 8.7.0 | Removal of IMS Service Level Trace feature | SP-60 | SP-130302 | approved | S5 | - | S5-130500 | - | 2013-04-02 | OAM7-Trace | - | 2013-06-17 |
0069 | - | A | Rel-9 | 9.1.0 | - | Rel-9 CR 32421 Remove IMS Service Level Trace | SP-60 | SP-130264 | reissued | S5 | S5-88 | S5-130501 | agreed | 2013-05-15 | OAM7-Trace | - | 2013-05-15 |
0069 | - | A | Rel-9 | 9.1.0 | 9.2.0 | Removal of IMS Service Level Trace feature | SP-60 | SP-130302 | approved | S5 | - | S5-130501 | - | 2013-04-02 | OAM7-Trace | - | 2013-06-17 |
0070 | - | A | Rel-10 | 10.5.0 | - | Rel-10 CR 32421 Remove IMS Service Level Trace | SP-60 | SP-130264 | reissued | S5 | S5-88 | S5-130502 | agreed | 2013-05-15 | OAM7-Trace | - | 2013-05-15 |
0070 | - | A | Rel-10 | 10.5.0 | 10.6.0 | Removal of IMS Service Level Trace feature | SP-60 | SP-130302 | approved | S5 | - | S5-130502 | - | 2013-04-02 | OAM7-Trace | - | 2013-06-17 |
0071 | - | A | Rel-11 | 11.6.0 | - | Rel-11 CR 32421 Remove IMS Service Level Trace | - | - | - | - | S5-88 | S5-130503 | rejected | 2013-05-15 | OAM7-Trace | - | 2013-05-15 |
page generated from database: 2013-10-16 10:34:12