Content for TR 23.751 Word version: 15.0.0
5 Key issues p. 7
5.1 Key issue 1: QoS differentiation in the user plane for untrusted WLAN p. 7
5.2 Key issue 2: QoS differentiation in the user plane for trusted WLAN p. 7
5.3 Key issue 3: UE Determination of the QoS to apply to an uplink IP packet for untrusted WLAN p. 8
5.4 Key issue 4: UE Determination of the QoS to apply to an uplink IP packet for trusted WLAN p. 8
6 Solutions p. 8
6.1 Solution 1: Solution to Key Issue#1 for untrusted WLAN based on IPsec child security associations p. 8
6.1.1 Description p. 8
6.1.2 Impacts on existing nodes and functionality p. 9
6.1.3 Solution evaluation p. 10
6.2 Solution 2: Solution to Key Issue #3 for untrusted WLAN based on reflective QoS p. 10
6.2.1 Description p. 10
6.2.2 Impacts on existing nodes and functionality p. 11
6.2.3 Solution evaluation p. 11
6.3 Solution 3: Solution to Key Issue #3 for sending TFTs to UE for untrusted WLAN based on IKEv2 p. 11
6.3.1 Description p. 11
6.3.1.1 Initial Attach p. 12
6.3.1.2 EPS Bearer Creation p. 12
6.3.1.3 EPS Bearer Modification p. 12
6.3.1.4 EPS Bearer Deactivation p. 13
6.3.1.5 Handover between 3GPP access and Untrusted non-3GPP p. 13
6.3.2 Impacts on existing nodes and functionality p. 13
6.3.3 Solution evaluation p. 14
6.4 Solution 4 to Key Issue #2: QoS differentiation for trusted WLAN based on DSCP mapping p. 14
6.4.1 Description p. 14
6.4.2 Impacts on existing nodes and functionality p. 15
6.4.3 Solution evaluation p. 15
6.5 Solution 5 to Key Issue #4 using WLCP for sending TFTs to UE for trusted WLAN p. 15
6.5.1 Description p. 15
6.5.2 Procedures p. 16
6.5.2.1 UE Initiated PDN connectivity request procedure in multi-connection mode p. 16
6.5.2.2 Dedicated bearer activation in WLAN on GTP S2a p. 16
6.5.2.3 PDN GW Initiated Bearer Modification p. 17
6.5.3 Impacts on existing nodes and functionality p. 18
6.5.4 Solution evaluation p. 18
6.6 Solution 6 to Key Issue #4 : Using WLCP bearers for sending TFTs to UE for trusted WLAN p. 19
6.6.1 Description p. 19
6.6.2 Procedures p. 19
6.6.2.1 UE Initiated PDN connectivity request procedure in multi-connection mode p. 19
6.6.2.2 Dedicated bearer activation in WLAN on GTP S2a p. 20
6.6.2.3 PDN GW Initiated Bearer Modification p. 21
6.6.2.4 PDN GW initiated Resource Allocation Deactivation p. 22
6.6.2.5 Handover between 3GPP access and Trusted non-3GPP p. 22
6.6.3 Impacts on existing nodes and functionality p. 22
6.6.4 Solution evaluation p. 23
6.7 Solution 7 to Key Issue #2: QoS differentiation for trusted WLAN based on WLCP bearer p. 23
7 Overall evaluation p. 24
8 Conclusions p. 25
$ Change History p. 26
