1. doc.: IEEE 802.11-14/0154r0 Submission January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 1 3GPP Liaison Report Date: 2014-01-22 Authors:

2. doc.: IEEE 802.11-14/0154r0 Submission 3GPP Projects WLAN is currently an area of intense activity in 3GPP Release 12 –SA (System Architecture) –RAN (Radio Access Networks) –CT (Core Networks) –Timelines Stage 2 (requirements studies) complete Stage 3 (specification) complete roughly mid 2014 The following pages describe the 3GPP WLAN Interworking architecture and the on-going projects in 3GPP Release 12 January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 2

3. doc.: IEEE 802.11-14/0154r0 Submission 3GPP WLAN Network Architecture Both trusted (integrated) and untrusted (over-the-top) interfaces exist The trusted interface involves operator deployed WLAN and is being evolved in 3GPP Release 12 January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 3 TWAG

4. doc.: IEEE 802.11-14/0154r0 Submission SA2/CT1 WLAN_NS (WLAN Network Selection) Work item to specifically evaluate and enhance existing 3GPP cellular + WLAN network selection policies, taking into account Wi-Fi Alliance (WFA) Passpoint Management Objects (MO) SA2 have incorporated relevant WFA Passpoint MO branches into the ANDSF tree for WLAN selection purposes Possible WLAN impacts: –Evaluate new ANDSF policy additions for inclusion into future WFA Passpoint MO January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 4

5. doc.: IEEE 802.11-14/0154r0 Submission SA2/CT1 SaMOG (S2a Mobility Over GTP) Extends the existing solution for connecting a “trusted” (secure) WLAN into the 3GPP EPC (Evolved Packet Core) using GTP (GPRS Tunnelling Protocol) over an “S2a” interface Currently enables connecting an operator deployed WLAN into the 3GPP core network (Release 11) Now adding (Release 12): –IP session mobility between 3GPP and WLAN –Multiple 3GPP APNs (services) over WLAN Possible WLAN impacts: –Control interface to signal handover to WLAN network – EAP extensions –Means to map 3GPP APNs to WLAN layer 2 interface –Session management using layer “2.5” WLCP (WLAN Control Protocol) and user plane separation using virtual MACs January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 5

6. doc.: IEEE 802.11-14/0154r0 Submission RAN2 WLAN/3GPP Radio Interworking Study Enable enhanced operator control for WLAN interworking Enable WLAN to be included in the operator’s Radio Resource Management Improve access network selection through knowledge of conditions on both 3GPP RAN and WLAN This is now a RAN approved work item: –For both Access Network Selection and Traffic Routing... –3GPP RAN provides RAN assistance information, e.g. thresholds, to the UE –Information is used by the UE to select access network, guided by either: RAN rules ANDSF policies The solution supports deployments with or without ANDSF Including co-existence of ANDSF and RAN when both are deployed Possible WLAN impacts: 1.Define enhanced WLAN policies (considering 3GPP RAN + WLAN context) 2.Provide enhanced WLAN related information January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 6

7. doc.: IEEE 802.11-14/0154r0 Submission backup January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 7

8. doc.: IEEE 802.11-14/0154r0 Submission SA2/CT1 WORM (Optimised offloading from cellular to WLAN) Solutions for optimized offloading of traffic to WLAN access when PS mobility between 3GPP RATs takes place. Now adding (Release 12): –Enabling an operator to prioritise specific 3GPP RAT’s (GERAN, UTRAN, LTE) relative to WLAN for the purposes of traffic routing. –Enabling service to be continued over WLAN where the service may not be available or degraded on the new 3GPP RAT. Possible WLAN impacts: –None expected. January 2014 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 8