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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Proximity-based services (ProSe);
Stage 2
(3GPP TS 23.303 version 15.1.0 Release 15)
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3GPP TS 23.303 version 15.1.0 Release 15 1 ETSI TS 123 303 V15.1.0 (2018-07)
Reference
RTS/TSGS-0223303vf10
Keywords
LTE,UMTS
ETSI
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DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
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3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
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GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
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3GPP TS 23.303 version 15.1.0 Release 15 2 ETSI TS 123 303 V15.1.0 (2018-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 23.303 version 15.1.0 Release 15 3 ETSI TS 123 303 V15.1.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 12
4 Architecture Model and Concepts . 12
4.1 General Concept . 12
4.2 Architectural Reference Model . 13
4.3 Reference points . 15
4.3.1 List of Reference Points . 15
4.4 Functional Entities . 16
4.4.1 ProSe Function . 16
4.4.1.1 General . 16
4.4.1.2 ProSe Function Discovery . 18
4.4.2 UE . 18
4.4.3 ProSe UE-to-Network Relay for Public Safety . 19
4.4.4 ProSe Application Server . 19
4.4.5 MME . 20
4.4.6 P-GW . 20
4.4.7 S-GW . 20
4.5 High Level Function . 20
4.5.1 Provisioning for ProSe Direct Discovery and ProSe Direct Communication . 20
4.5.1.1 Authorization and provisioning for ProSe. 20
4.5.1.1.1 General . 20
4.5.1.1.2 Provisioning information for ProSe Direct Discovery and ProSe Direct Communication . 21
4.5.2 Subscription to ProSe. 27
4.5.3 IP address allocation . 28
4.5.4 ProSe UE-to-Network Relaying . 29
4.5.5 ProSe Proxy Function . 30
4.5.6 Support for ProSe for UEs in limited service state . 30
4.6 Identifiers . 30
4.6.1 Identifiers for EPC-level ProSe Discovery . 30
4.6.2 Identifiers for EPC support for WLAN direct discovery and communication . 30
4.6.3 Identifiers for ProSe Direct Communication . 31
4.6.3.1 ProSe UE ID. 31
4.6.3.2 ProSe Layer-2 Group ID . 31
4.6.4 Identifiers for ProSe Direct Discovery. 31
4.6.4.1 ProSe Application ID . 31
4.6.4.2 ProSe Application Code . 31
4.6.4.2a Discovery Filter . 32
4.6.4.2b ProSe Application Mask . 32
4.6.4.3 Identifiers for ProSe UE-to-Network Relay discovery and selection . 33
4.6.4.4 ProSe Query Code . 33
4.6.4.5 ProSe Response Code . 33
4.6.4.6 ProSe Restricted Code. 33
4.6.4.7 ProSe Discovery UE ID (PDUID) . 34
4.6.4.8 Restricted ProSe Application User ID (RPAUID) . 34
4.6.4.9 Identifiers for Group Member Discovery . 34
4.6.4.10 Identifiers for Relay Discovery Additional Information . 35
4.6.4.11 Metadata Index . 35
ETSI
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3GPP TS 23.303 version 15.1.0 Release 15 4 ETSI TS 123 303 V15.1.0 (2018-07)
4.6.4.12 Metadata Index Mask . 35
5 Functional Description and Information Flow . 35
5.1 Control and user plane stacks . 35
5.1.1 Control Plane . 35
5.1.1.1 General . 35
5.1.1.2 UE - ProSe Function . 36
5.1.1.3 HSS - ProSe Function . 36
5.1.1.4 SLP - ProSe Function . 37
5.1.1.5 UE - UE . 37
5.1.1.5.1 Discovery plane PC5 interface . 37
5.1.1.5.2 PC5 Signalling Protocol . 37
5.1.1.6 ProSe Function - ProSe Function . 38
5.1.1.7 ProSe Function - ProSe Application Server . 38
5.1.2 User Plane . 39
5.1.2.1 UE - UE . 39
5.1.2.2 UE - UE-to-Network Relay . 39
5.2 Service authorisation and revocation for ProSe Direct Discovery and ProSe Direct Communication . 40
5.2.1 Service authorisation procedures . 40
5.2.2 Service authorization update procedures . 41
5.2.2.1 General . 41
5.2.2.2 HSS triggered ProSe direct Service authorization update . 41
5.2.2.3 ProSe function triggered ProSe Direct Service revocation (non-roaming) . 42
5.2.2.4 ProSe function triggered ProSe Direct Service revocation (roaming) . 43
5.3 ProSe Direct Discovery . 43
5.3.1 General . 43
5.3.1.1 Overview . 43
5.3.1.2 ProSe Direct Discovery Models . 44
5.3.1.3 WLAN-based ProSe Direct Discovery. 45
5.3.2 Overall procedure for ProSe Direct Discovery (Model A) . 45
5.3.2A Overall procedure for ProSe Direct Discovery (Model B) . 47
5.3.3 Discovery Request . 48
5.3.3.1 General . 48
5.3.3.2 Announce request (non-roaming) - open discovery . 48
5.3.3.2A Announce Request (non-roaming) - restricted discovery . 50
5.3.3.3 Announce request (roaming/inter-PLMN transmission) - open discovery . 53
5.3.3.3A Announce Request (roaming/inter-PLMN transmission) - restricted discovery . 55
5.3.3.4 Monitor request (non-roaming) - open discovery . 59
5.3.3.4A Monitor Request (non-roaming) - restricted discovery . 61
5.3.3.5 Monitor request (roaming) - open discovery . 64
5.3.3.5A Monitor Request (roaming) - restricted discovery . 67
5.3.3A Discovery Request - Model B procedures . 70
5.3.3A.1 General . 70
5.3.3A.2 Discoveree Request (non-roaming) - restricted discovery . 70
5.3.3A.3 Discoveree Request (roaming/inter-PLMN transmission) - restricted discovery . 72
5.3.3A.4 Discoverer Request (non-roaming) - restricted discovery . 74
5.3.3A.5 Discoverer request (roaming/inter-PLMN transmission) - restricted discovery . 77
5.3.4 Discovery reporting . 80
5.3.4.1 Match report (non-roaming) - open discovery . 80
5.3.4.1A Match Report (non-roaming) - restricted discovery . 81
5.3.4.2 Match report (roaming/inter-PLMN transmission) - open discovery . 83
5.3.4.2A Match Report (roaming/inter-PLMN transmission) - restricted discovery . 84
5.3.4A Discovery reporting - Model B procedures . 86
5.3.4A.1 Match report (non-roaming) - restricted discovery . 86
5.3.4A.2 Match report (roaming/inter PLMN discovery transmission) - restricted discovery . 87
5.3.5 Announcing Alert Procedures - restricted discovery . 89
5.3.5.1 Announcing Alert (non-roaming) . 89
5.3.5.2 Announcing Alert (roaming) . 90
5.3.5A Void . 91
5.3.6 Void . 91
5.3.6A Direct Discovery Update Procedures . 91
5.3.6A.1 Discovery Update - open discovery . 91
ETSI
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3GPP TS 23.303 version 15.1.0 Release 15 5 ETSI TS 123 303 V15.1.0 (2018-07)
5.3.6A.1.1 General . 91
5.3.6A.1.2 Network-initiated discovery update procedure . 91
5.3.6A.1.3 UE initiated discovery update procedures . 92
5.3.6A.2 Discovery Authorization Update - restricted discovery . 94
5.3.6A.2.1 General . 94
5.3.6A.2.2 Revocation of Discovery Filters . 95
5.3.6A.2.3 Allocation of a new ProSe Restricted Code and update of Discovery Filters . 96
5.3.7 Direct Discovery for Public Safety use . 97
5.3.7.1 General . 97
5.4 Procedures for ProSe Direct Communication. 99
5.4.1 One-to-many ProSe Direct Communication general . 99
5.4.2 One-to-many ProSe Direct Communication transmission . 100
5.4.3 One-to-many ProSe Direct Communication reception . 100
5.4.4 Direct communication via ProSe UE-to-Network Relay . 101
5.4.4.1 General . 101
5.4.4.2 IPv6 Stateless Address auto-configuration . 103
5.4.4.3 IPv4 Address allocation using DHCPv4 . 104
5.4.4.4 TMGI advertisement and eMBMS traffic relay . 104
5.4.4.5 Cell ID announcement procedure . 106
5.4.5 One-to-one ProSe Direct Communication . 107
5.4.5.1 General . 107
5.4.5.2 Establishment of secure layer-2 link over PC5 . 107
5.4.5.3 Layer-2 link maintenance over PC5 . 108
5.4.5.4 Layer-2 link release over PC5 . 108
5.4.6 ProSe Per-Packet Priority . 109
5.4.6.1 General . 109
5.4.6.2 ProSe UE-to-Network Relay . 109
5.4.7 ProSe Per-Packet Reliability . 109
5.4.7.1 General . 109
5.5 EPC-level ProSe Discovery procedures . 110
5.5.1 General . 110
5.5.2 Overall call flow for EPC-level ProSe Discovery . 110
5.5.3 UE registration for ProSe . 111
5.5.4 Application registration for ProSe . 111
5.5.5 Proximity Request . 112
5.5.6 UE Location Reporting . 113
5.5.7 Proximity Alert . 114
5.5.8 UE deregistration for ProSe . 114
5.5.8.1 General . 114
5.5.8.2 Network-initiated deregistration . 114
5.5.8.3 UE-initiated deregistration . 115
5.5.9 Proximity Request Cancellation . 115
5.6 EPC support for WLAN direct discovery and communication . 116
5.6.1 General . 116
5.6.2 Enabling of EPC assisted WLAN direct communication . 116
5.6.3 Revocation of EPC assisted WLAN direct communication . 117
5.7 ProSe impacts to EPC procedures . 118
5.7.0 General .
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