Intel Confidential 1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-10-0020-00-0000 Title: SRHO between WiMAx<>3GPP Date Submitted: Jan, 2010 Presented.

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Intel Confidential 1 IEEE MEDIA INDEPENDENT HANDOVER DCN: Title: SRHO between WiMAx<>3GPP Date Submitted: Jan, 2010 Presented at IEEE Session #36 Authors or Source(s): Puneet Jain (Intel Corporation) Abstract: Single Radio Handovers b/w WiMAX and 3GPP

Intel Confidential 2 2 IEEE presentation release statements This document has been prepared to assist the IEEE Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE ’ s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE ’ s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual and in Understanding Patent Issues During IEEE Standards Development Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3

Intel Confidential 3 L3 Approach  L3 mechanism using IWF (Inter-Working Function) –UE communicates with IWF via X200/R9 interface (IP Tunnel) –The UE communicates with the 3GPP SFF over a mobile WiMAX IP access in order to prepare handover to a 3GPP access. –The UE communicates with the WiMAX SFF over a 3GPP access (GERAN/UTRAN/EUTRAN) in order to prepare handover to a mobile WiMAX access.  The IWF is composed of two independent logical elements – WiMAX SFF, 3GPP SFF –For Handover from 3GPP to WiMAX: WiMAX SFF emulates an BS. The WiMAX SFF interfaces with ASN using WiMAX R6 interface. –For Handover from WiMAX to 3GPP SFF emulates a RNC/eNB (RRC functionality) – –3GPP SFF exposes a X201 interface to target SGSN (GERAN/UTRAN HO) or X202 interface to target MME (E-UTRAN HO). – –X201 is like RNC - SGSN interface (Iu), X202 is like eNB – MME interface (S1-MME) 3GPP SFF WiMAX SFF X200 R9 X202 X201 R6 IWF To UE To ASN-GW To SGSN/MME

Intel Confidential 4 L3 Architecture for Single Radio HO from 3GPP to WiMAX SGi PCRF Gx HSS Operator’s IP Services e.g. (IMS, PSS, etc.),., SWx S6b Rx PDN- GW AAA S2a STa Gxc S5 S6a S-GW Gxa ASN ASN GW BS GERAN UTRAN MME SGSN UE R6 S3 E-UTRAN S1-MME LTE-Uu WiMAX-SFF R9

Intel Confidential 5 L3 Architecture for Single Radio HO from WiMAX to Rel8 3GPP

Intel Confidential 6 L3 Architecture for Single Radio HO from WiMAX to Pre-Rel8 3GPP

Intel Confidential 7  SFF Discovery via DNS query –MS acquires the domain name via DHCP and generates the FQDN. The MS sends a DNS query to the DNS Server including the FQDN. The DNS server responds with a DNS answer including the SFF’s IP address.  FQDN is generated as below –WiMAX-BSID.WiMAX.SFF. SFF Discovery

Intel Confidential 8 WiMAX to Rel8 UTRAN/GERAN Handover

Intel Confidential 9 WiMAX to Pre-Rel8 UTRAN/GERAN Handover

Intel Confidential 10 WiMAX to E-UTRAN Handover

Intel Confidential 11 EPS Attach Type  EPS Attach Type is present in Attach Request.  Reserved bit can be used to indicate “Pre-Attachment with 3GPP SFF”  MME on receiving “Pre-Attachment with 3GPP SFF” SHALL set the Handover Indication (HI) in create session request towards the S- GW.