Foreword1 Scope2 References3 Definitions of terms, symbols and abbreviations4 General5 Provisioning of configuration information for 5G ProSe6 5G ProSe direct discovery6.1 Overview6.2 Procedures6.2.1 Types of 5G ProSe direct discovery procedures6.2.2 Announce request procedure for open 5G ProSe direct discovery6.2.3 Announce request procedure for restricted 5G ProSe direct discovery model A6.2.4 Monitor request procedure for open 5G ProSe direct discovery6.2.5 Monitor request procedure for restricted 5G ProSe direct discovery model A6.2.6 Discoveree request procedure for restricted 5G ProSe direct discovery model B6.2.7 Discoverer request procedure for restricted 5G ProSe direct discovery model B6.2.8 Match report procedure for open 5G ProSe direct discovery6.2.9 Match report procedure for restricted 5G ProSe direct discovery model A6.2.10 Match report procedure for restricted 5G ProSe direct discovery model B6.2.11 Direct discovery update procedure for open discovery6.2.12 Direct discovery update procedure for restricted discovery6.2.13 Announcing alert procedure6.2.14 5G ProSe direct discovery procedure over PC5 interface6.2.15 Group member discovery over PC5 interface6.2.16 Procedure for UE to use provisioned radio resources for 5G ProSe direct discovery6.2.17 5G PKMF address request procedure7 5G ProSe direct communications7.1 Overview7.2 Unicast mode 5G ProSe direct communication over PC57.2.1 Overview7.2.2 5G ProSe direct link establishment procedure7.2.3 5G ProSe direct link modification procedure7.2.4 5G ProSe direct link identifier update procedure7.2.5 5G ProSe direct link keep-alive procedure7.2.6 5G ProSe direct link release procedure7.2.7 PC5 QoS flow establishment over 5G ProSe direct link7.2.8 PC5 QoS flow match over 5G ProSe direct link7.2.9 Data transmission over 5G ProSe direct link7.2.10 5G ProSe direct link security mode control procedure7.2.11 5G ProSe direct link re-keying procedure7.2.12 5G ProSe direct link authentication procedure7.3 Broadcast mode 5G ProSe direct communication over PC57.4 Groupcast mode 5G ProSe direct communication over PC57.5 Void7.6 PC3ach control protocol for 5G ProSe direct communication8 5G ProSe UE-to-network relay9 Handling of unknown, unforeseen and erroneous protocol data10 Message functional definitions and contents11 Information elements coding12 List of system parametersA.1 IANA registrations for MIME types 7.5 Void 24.5543GPPProximity-services (ProSe) in 5G System (5GS) protocol aspectsRelease 17Stage 3TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM 7.5.1 Void 7.5.2 Void 7.5.3 Void