1. 1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-08/306r0 Title: MIH Case Study Date Submitted: November 10, 2008 Presented at IEEE 802.21 session #29 in Dallas, TX Authors or Source(s): Juan Carlos Zuniga and Gidon Reid Abstract: This presentation provides an overview of an MIH case study where 802.21 MIH interoperability is achieved and demonstrated.

2. 2 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 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. This is a contribution by the National Institute of Standards and Technology and is not subject to copyright in the US. The contributors do not have the authority to override the NIST policy in favor of the IEEE 802.21 policy. The contributor is familiar with IEEE patent policy, as stated in Section 6 of the IEEE-SA Standards Board bylaws and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf> Section 6 of the IEEE-SA Standards Board bylawshttp://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/board/pat/faq.pdf

3. 3 Overview Purpose Demonstrate viability and performance of IEEE 802.21 MIH Protocol in an emulated IMS framework, running on a real off-the-shelf mobile handset and over live Cellular and WLAN networks Client InterDigital’s slim client optimized for touch-screen- enabled Pocket PC / Smartphone 3G (UMTS) and WiFi (802.11b/g) capabilities Windows Mobile OS Sever BT MIH Server provides Information Services where available networks are advertised based on the Mobile’s location

4. 4 802.21 MIH Demo - Network Architecture

5. 5 Handover Scenarios Setup MIH Client executing bi-directional, make-before-break handover of SIP data session between the 3G and the WLAN MIH Server providing Information Services (IS) for available networks based on mobile node’s location Data streamed from remote host or Correspondent Node (CN) No application enhancements such as bi-cast or data buffering are being used -> handover’s worst case Scenario 1 - WCDMA to WLAN Handover performed using network availability information from BT MIH Information Server in the UK, based on UE’s location Scenario 2 - WLAN to WCDMA Handover performed using WLAN signal strength as principal criterion

6. 6 Goals Demonstrate MIH capabilities of reducing application-level interruption times from 15-20 seconds to 0-500 ms when handing over between two completely independent radio access technologies Demonstrate feasibility of performing handover between 3GPP and non-3GPP technologies over a live network using a SIP-based application Demonstrate feasibility of implementing IEEE 802.21 MIH Server as an IMS Application Server operating on a live network Demonstrate feasibility of developing a slim MIH Client that can be easily downloaded onto a mobile device as an executable