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TR 23.733 (SA2)
Study on architecture enhancements to
ProSe UE-to-Network Relay

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Rapporteur:  Dr. Tonesi, Dario Serafino
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The present document is the Technical Report for the study item "Study on architecture enhancements to ProSe UE-to-Network Relay". Its objective is to study and evaluate potential architecture enhancements needed to support the connection of an Evolved ProSe Remote UE with UICC with the network via an Evolved ProSe UE-to-Network Relay using E-UTRA (in coverage, in enhanced coverage or out of coverage) or Non-3GPP access technologies (enhancements to Non-3GPP access technologies are not part of this study).

full Table of Contents for  TR 23.733  Word version:   15.1.0

 

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1  ScopeWord-p. 8
2  References
3  Definitions, symbols and abbreviationsWord-p. 9
4  Architectural considerations
5  Key issuesWord-p. 12
6  SolutionsWord-p. 15
6.1  Solutions to Key Issue 1
6.1.1  Solution 1: Subscription based authorisation
6.1.2  Solution 2: Authorisation of eRelay-UE and eRemote-UE
6.1.3  Solution 3: Authorisation for Indirect 3GPP Communication via MME
6.1.4  Solution 4: Dynamic Trust relationship establishment using ProSe function/PC3Up
6.1.4B  Solution 4B: Dynamic Trust relationship establishment for MME based authorisation
6.1.5  Solution 5: Independent UE Authentication and Authorisation for Indirect 3GPP Communication via MME
6.1.6  Solution 6: Simplified authorisation of eRelay-UE and eRemote-UE
6.2  Solutions to Key Issue 2Word-p. 35
6.3  Solutions to Key Issue 3Word-p. 39
6.4  Solutions to Key Issue 4
6.5  Solutions to Key Issue 5
6.5.1  Solution 1: NAS Based Service Continuity Solution
6.5.2  Solution 2: AS based Service Continuity Solution
6.5.3  Solution 3: Switching between direct and indirect communicationWord-p. 54
6.5.4  Solution 4: Simplified NAS Based Service Continuity Solution
6.5.5  Solution 5: Handover of eRelay-UE with eRemote-UE(s) having an active indirect connection
6.6  Solutions to Key Issue 6Word-p. 64
7  Overall evaluation
8  Conclusions
A  Combined Solution 1Word-p. 77
B  Solution based on L3 Relay architectureWord-p. 79
C  Change history

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