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TR 23.751 (SA2)
Study on support of
Voice over WLAN

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V15.0.0 (Wzip)  2017/06  26 p.

Rapporteur:  Mr. Drevon, Nicolas

The present document studies enhancements required for the support of VoIMS via Trusted and Untrusted WLAN access related with QoS differentiation for better user experience. This includes:
  • potential user plane impacts for the support of QoS differentiation;
  • potential UE-TWAN and UE-ePDG signalling enhancements for the support of QoS differentiation.

full Table of Contents for  TR 23.751  Word version:   15.0.0

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1  ScopeWord-p. 6
2  ReferencesWord-p. 6
3  Definitions, symbols and abbreviationsWord-p. 6
4  Architectural considerationsWord-p. 7
5  Key issuesWord-p. 7
5.1  Key issue 1: QoS differentiation in the user plane for untrusted WLANWord-p. 7
5.2  Key issue 2: QoS differentiation in the user plane for trusted WLANWord-p. 7
5.3  Key issue 3: UE Determination of the QoS to apply to an uplink IP packet for untrusted WLANWord-p. 8
5.4  Key issue 4: UE Determination of the QoS to apply to an uplink IP packet for trusted WLANWord-p. 8
6  SolutionsWord-p. 8
6.1  Solution 1: Solution to Key Issue#1 for untrusted WLAN based on IPsec child security associationsWord-p. 8
6.2  Solution 2: Solution to Key Issue #3 for untrusted WLAN based on reflective QoSWord-p. 10
6.3  Solution 3: Solution to Key Issue #3 for sending TFTs to UE for untrusted WLAN based on IKEv2Word-p. 11
6.4  Solution 4 to Key Issue #2: QoS differentiation for trusted WLAN based on DSCP mappingUpWord-p. 14
6.5  Solution 5 to Key Issue #4 using WLCP for sending TFTs to UE for trusted WLANWord-p. 15
6.6  Solution 6 to Key Issue #4 : Using WLCP bearers for sending TFTs to UE for trusted WLANWord-p. 19
6.7  Solution 7 to Key Issue #2: QoS differentiation for trusted WLAN based on WLCP bearerWord-p. 23
7  Overall evaluationWord-p. 24
8  ConclusionsWord-p. 25
A  Change historyWord-p. 26

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