doc.: IEEE /1060r1 Submission September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 1 3GPP Liaison Report Date: Authors:

doc.: IEEE /1060r1 Submission 3GPP Projects WLAN is currently an area of intense activity in 3GPP Release 12 –SA (System Architecture) –RAN (Radio Access Networks) –Timelines Stage 2 (requirements studies) nearing completion Major Stage 2 decisions completed for SA in September 2013 RAN studies extended to December 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 September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 2

doc.: IEEE /1060r1 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 September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 3 TWAG

doc.: IEEE /1060r1 Submission SA2 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) Focuses on roaming and service related aspects SA2 will likely incorporate relevant WFA Passpoint MO branches into the ANDSF tree for WLAN selection purposes, keeping the rest of the branches addressing the cellular + WLAN context Possible WLAN impacts: –Evaluate new ANDSF policy branches for inclusion into future WFA Passpoint MO –How to do policy push in NSWO (Non Seamless WLAN Offload – i.e. Local Breakout) environments (per 3GPP TS ) September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 4

doc.: IEEE /1060r1 Submission SA2 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 –No mapping to a representative IEEE network architecture September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 5

doc.: IEEE /1060r1 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 and mobility through knowledge of conditions on both 3GPP RAN and WLAN Currently at the study stage, with three directions being considered: 1.3GPP RAN provides RAN assistance information to UE to select access technology according to network policies. 2.3GPP RAN controls the interworking by providing e.g. thresholds in RAN system information and/or dedicated signaling (behavior similar to cell reselection within and between 3GPP radio access technologies). 3.3GPP RAN configures the UE to perform and report WLAN measurements, and, after evaluation may instruct UE to connect to WLAN. Possible WLAN impacts: 1.Define enhanced WLAN policies (considering 3GPP RAN + WLAN context) or 2.Provide the necessary WLAN related information for a 3GPP RAN control solution September 2013 S. Rayment, Ericsson & S. McCann, BlackBerrySlide 6