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Content for TR 23.703 Word version: 12.0.0

1… 4… 6… 6.2 6.3 6.4… 7…

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4 Assumptions and architectural requirements p. 16

4.1 Assumptions p. 16

4.1.1 Supported E-UTRAN ProSe direct communication scenarios p. 16

4.1.2 Supported E-UTRAN ProSe direct communication Modes p. 17

4.1.3 UE-Relay variants for UE-to-UE relay or UE-to-Network relay p. 18

4.1.4 Direct discovery models p. 19

4.2 Architectural requirements p. 19

4.3 High level architecture p. 20

4.3.1 Reference architecture model p. 20

4.3.2 Reference Points/Interfaces p. 21

4.3.3 Entities p. 21

5 Key Issues p. 22

5.1 Key Issue #1: ProSe system architecture p. 22

5.1.1 General description p. 22

5.2 Key Issue #2: Configuration for ProSe direct discovery p. 23

5.2.1 General description p. 23

5.3 Key Issue #3: Configuration and Capability Handling for ProSe p. 23

5.3.1 General description p. 23

5.4 Key Issue #4: ProSe direct communication one-to-one p. 23

5.4.1 General description p. 23

5.5 Key Issue #5: Relay for Public Safety ProSe p. 24

5.5.1 General description p. 24

5.6 Key Issue #6: Authorization for ProSe capability feature p. 25

5.6.1 General description p. 25

5.7 Key Issue #7: ProSe direct discovery (common key issue in and out of E-UTRAN network coverage) p. 26

5.7.1 General description p. 26

5.8 Key Issue #8: EPC-level ProSe discovery p. 26

5.8.1 General description and assumptions p. 26

5.9 Key Issue #9: EPC Support for WLAN Direct communications p. 27

5.9.1 General description and assumptions p. 27

5.10 Key Issue #10: ProSe Identities p. 27

5.10.1 General description p. 27

5.11 Key Issue #11: Service Continuity aspects p. 28

5.11.1 General description p. 28

5.12 Key Issue #12: ProSe one-to-many communications p. 28

5.12.1 General description and assumptions p. 28

5.13 Key Issue #13: Charging in ProSe p. 29

5.13.1 General description p. 29

5.14 Key Issue #14: Establishment of a ProSe communication path via eNB p. 29

5.14.1 General description p. 29