1. 21-06-0807-00-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-06-0807-00-0000 Title: Follow-up feedback from FMCA on IEEE 802.21 functions Date Submitted: November, 14 th, 2006 Presented at IEEE 802.21 session #17 in Texas, USA Authors or Source(s): FMCA Operators: Brasil Telecom, British Telecommunications Plc, Rogers Communications Inc, Telecom New Zealand Abstract: Follow-up feedback from FMCA on IEEE 802.21 functions

2. 21-06-0807-00-0000 Discussion Items FMCA Overview FMCA Programme Update FMCA Vendor Affiliation Programme Update FMCA Operator Feedback on proposed 802.21 Functions FMCA Operator Scenarios Next Steps

3. 21-06-0807-00-0000 FMCA Overview Formed in mid-2004. Incorporated as a not-for-profit trade association under New York law, USA, in August 2006. Global alliance of telecom operators focused on accelerating the development and availability of Convergence products and services. 27 Leading integrated Telecom Operators = over 800 million subscribers (1 in 3 of the world’s telecom users) Not a standards development organisation. FMCA Vendor Affiliation Programme launched globally. Applications may be submitted as from December 2006.

4. 21-06-0807-00-0000 FMCA Priority Programmes A key factor in enabling telecom operators to deploy Convergence services: Common Operator Requirements for Converged products & services to work in any environment. Ensuring availability of Converged Devices: Specifying baseline specifications for Wi-Fi enabled devices. Specifying Architecture & Interfaces for networks: Seamless authentication and registration in a common, secure and consistent manner. Defining procedures & interfaces for Interconnect: Enabling services to be fully interoperable between multiple operators and across multiple networks. Defining requirements for Converged Roaming: Encouraging a global Converged wireless-cellular roaming service for telecom users.

5. 21-06-0807-00-0000 FMCA Vendor Affiliation Programme Framework for vendors to contribute to the Alliance’s work in cooperation with the Alliance Members: Delivery function within the FMCA Technical Working Group that identifies and addresses technical requirements. A set of work procedures and frameworks built around the various Standards and Certification bodies. Timely generation and delivery of Technical Work Items that will support the FMCA Priority Programmes: Focus is on service, network and device interoperability requirements.

6. 21-06-0807-00-0000 Operator Feedback on MIH functions FMCA Operators would like to understand the impacts of IEEE 802.21 on the following requirements: Lawful Intercept Emergency Services Country specific roaming/network selection requirements Anti-trust aspects regarding cost information Privacy laws with respect to location information Joint work item proposal (FMCA-IEEE 802.21) As the above requirements may restrict the general IEEE 802.21 enabled HO options, FMCA may be able to analyse the specific impacts and may bring requirements related to regulatory and legal aspects identified as potential triggers. This work item will require IEEE 802.21 participation.

7. 21-06-0807-00-0000 Operator feedback on IEEE 802.21 roaming Closer discussions required on how IEEE 802.21 can work with current and proposed Operator roaming and operating models. Proposal joint FMCA – IEEE 802.21 audio call to clarify roaming models. Consider creation of joint sub-working group

8. 21-06-0807-00-0000 Operator feedback on Information Elements What information does IEEE 802.21 need from FMCA Operators on the different types of Information Elements Private Public Roaming What specific information does IEEE 802.21 need from FMCA Operators on different parameters and options needed for Information Elements. Have IEEE 802.21 thought about management options for Information Elements, e.g. use of OMA DM? Proposed Joint Work Item – to identify a number operator parameters that might qualify for relevant IEs. This will require IEEE 802.21 participation.

9. 21-06-0807-00-0000 Operator feedback on IEEE 802.21 IS Options for IS location – Access Node vs Network Application Server? Does an open and standard interface exist for real-time access? Is the latency for retrieval appropriate for handover time budgets? How can the addition of new access network types and specific PoAs be supported? Can it be automated? How does IS know the current location of the client – who adds the current location to the get? How is authentication/trust between the client and the IS established and maintained? Benefit of having optional less complex implementation that would not require the continuous update of the MIIS, may be using network auto-discovery techniques?

10. 21-06-0807-00-0000 Operator feedback on handover Network Initiated handover is less well defined in terms of the likely scenarios and desirability when this happens. Examples of network-side triggers Pre-pay limit exceeded New authentication for the same userId detected Location update indicates a “home” or preferred access zone Network congestion on current access detected, network initiates handover to achieve load balancing: Network selection options – SIM/user vs network based

11. 21-06-0807-00-0000 Feedback on complex multimedia sessions handover Handover support for multimedia services, much harder problem than “single media component” case (like voice only). Preliminary FMCA analysis show that IS will need specific IEs to respond to higher layers requirements in handing over complex multimedia sessions (serving real time multimedia services) A special case of handing over active IMS sessions between access networks served by the same or different IMS operator(s) should be considered. Need for view on how 802.21 MIH, Mobile IP and 3GPP VCC will work together to achieve inter-technology handovers

12. 21-06-0807-00-0000 Example Operator Deployment Scenario nOperator (CDMA) sees an imminent use of the 802.21 MIH layer in coordinating access technology handover across heterogeneous networks, under the control of a common MIP based core network. Without MIH support, handover will use basic RSSI indications for handoff triggers – thus preventing the use of advanced fast handover protocols already defined by the IETF. nWhile current cdma2000 packet data networks are based on MIPv4, we envisage that the MIH layer in conjunction with Fast Handoffs for IPv4 will allow fast lossless handover for future multimedia services. nHandovers to be mobile or network initiated. nThe 802.21 specification provides functionality to guide network selection based on operator defined policy information, supplied via the MIIS.

13. 21-06-0807-00-0000 Example Operator Deployment Scenario GSM / GPRS / UMTS / HSPA / UMA / VCC (1) Operator (GSM / GPRS / UMTS / HSPA) deploys in a phased approach, based on specifics of its market, technology maturity, and terminals availability, the above listed mobile access technologies During the intermediate phases of each new technology, that particular access technology has an “island” type of coverage overlaying the previously deployed technologies coverage Intra-Operator Access Domains can be defined by the operator and appropriate IEs assigned The IS can then define an operator-reconfigurable hierarchical access structure that can be used in setting up access preferences and map the network capabilities to the offered services within each access domain constraints Particular operator domains may be defined based on regional spectrum availability and regulations

14. 21-06-0807-00-0000 Example Operator Deployment Scenario GSM / GPRS / UMTS / HSPA / UMA / VCC (2) Most GSM / GPRS / UMTS mobile operators are interested in VCC (Voice Call Continuity), that delivers call continuity between the PS networks and the extensive CS (GSM) infrastructure Appropriate IEs may enable the IS to facilitate the discovery of VCC capabilities part of a given operator domain The content of the corresponding IE fields are to be defined as maximum number of possible states and their meaning The defined IEs may become part of the inter-operator roaming agreements

15. 21-06-0807-00-0000 Summary key gaps Key gaps foreseen in 802.21: Business scenarios/models for key information elements and roaming models. Understanding of actual business benefits in terms of user experience, etc Validity and completeness of the Information Elements within the IS Network initiated handover scenarios

16. 21-06-0807-00-0000 Next Steps FMCA is aiming to cover roaming and inter-operability aspects as part of the development and delivery of some of its Priority Programmes. IEEE 802.21 will have the opportunity to contribute to these requirements. FMCA would like to agree with IEEE 802.21 very specific work items to be jointly developed and/or reviewed by FMCA and IEEE 802.21, which should address the gaps foreseen in 802.21 by FMCA Operators; i.e.: Business scenarios/models User experience Information Elements Handover Scenarios