1. 21-05-0366-01-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: Title: Network Controlled Network Selection and HO scenarios Date Submitted: September, 2005 Presented at IEEE 802.21 session #NN in Orange County, CA Authors or Source(s): Srinivas Sreemanthula, Stefano Faccin Abstract: Discuss network controlled scenarios

2. 21-05-0366-01-0000 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. 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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 802.21. 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 http://standards.ieee.org/board/pat/guide.html> Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3 http://standards.ieee.org/board/pat/guide.html

3. 21-05-0366-01-0000 Introduction 802.21 aids in inter-technology handover with various usage scenarios in mind It is also important for 802.21 to provide tools for cellular and other operators to exercise network control to inter-work and maximize the resource pool in other access networks This slide set presents network controlled usage scenarios for Inter-technology network selection and HO control as a means to understand the importance of such use cases This is for informational purposes only that can be used to verify these scenarios are indeed covered under 802.21

4. 21-05-0366-01-0000 802.21 vs Current 3GPP Mechanisms Access Control/ Network selection: Currently core functionality of 3GPP networks It is in the interest of several 3GPP parties in keeping access control between 3GPP (access) networks under its control This can be achieved while introducing enablers for seamless inter-technology mobility using 802.21 802.21 focuses on aiding heterogeneous handoff (I.e. inter-technology handoff e.g. 3GPP-802.11, 802.11-802.16, etc.) The only intra-technology handoff in scope is inter-subnet/inter-domain handoff for 802.11, simply because 802.11 does not define it 3GPP/PP2 and 802.16 have their own access selection mechanisms for homogeneous handoff, and 802.21 does not intend to interfere with that 3GPP-WLAN IW: current Network Selection mechanisms Based on policies and information stored in UE (SIM) Based on information collected from UE Network has no active role at moment of selection Issue: cumbersome mechanism, requires connecting to a network to decide whether to connect to the network

5. 21-05-0366-01-0000 802.21 Usage Scenarios for 3GPP A set of example access system selection scenarios to describe what can be achieved with 802.21 Scenarios using 802.21 service are split between two dimensions Network Selection & Handover control Terminology 3G-PDN: indicates the whole network (including AN and core network, i.e. up to point where UE gets IP connectivity) MME: Mobility Management Entity Its a network entity sitting above current 3GPP access (e.g. located after the ISN) in charge of making connectivity decision for network controlled handoff. MME may incorporate an instance of MIHF

6. 21-05-0366-01-0000 Usage Scenarios for 3G Cellular Network -> IEEE 802.x Scenario-A: 3G network is MIH unaware Scenario-A) MIH unaware serving network (3G), Emphasis is on enabling network handoff control by home network or third party (e.g. enterprise) Examples are Visited 3G network not 802.21 aware (no 802.21 specific functions in 3G network) Visited 3G network has no active control over vertical HO decisions Home network or 3rd party controls the network selection and HO decisions (IS, ES and CS used) Visited 3G-PDN GERAN UTRAN WiMAX PDN 802.16-AN 802.11-AN Internet MIHF NW Current active connection Access to MIHF (IS) over L3 Home Network MIHF NW Access to MIHF (IS/ES/CS) over L3 UE MIHF UE

7. 21-05-0366-01-0000 Usage Scenarios for 3G Cellular Network -> IEEE 802.x Scenario-B: 3G network is MIH aware, provides IS, ES & CS Scenario-B) MIH services provided by serving network (3G), Emphasis is on enabling network handoff control by network operator (e.g. home) to target access owned by the same operator Examples are Operator owning multiple access technologies and user belongs to this network Operator has roaming agreements to cover multiple accesses for users from other networks 3G network can control network selection and HO decisions at MME Home 3G-PDN GERAN UTRAN WiMAX PDN 802.16-AN 802.11-AN Internet Current active connection Access to MIHF over L3 UE MIHF UE MIHF NW MME Note: MIHF can be physically implemented as a set of MIHF. MME can be more or less centralized

8. 21-05-0366-01-0000 Usage Scenarios for 3G Cellular Network -> IEEE 802.x Scenario-C: 3G network proxies MIH IS services, provides ES and CS Scenario-C) MIH IS services proxied by serving network (3G) Emphasis is on enabling network handoff control by network operator (e.g. home) to target accessed owned by roaming partners Proxy is to access IS from other networks Examples are Operator has no agreements to cover multiple accesses for roaming users 3G network controls vertical HO decisions Home 3G-PDN GERAN UTRAN WiMAX PDN 802.16-AN 802.11-AN Internet MIHF NW Current active connection MIHF NW UE MIHF UE Access to MIHF IS over L3 Access to MIHF IS, ES and CS over L3

9. 21-05-0366-01-0000 NW Initiated NW Selection for Scenario-B 3G->802.x: 3G provides all MIH services Scan(802.11) MAC Layers Beacon 3G-PDNMME802.16-AN802.11-ANMIHF UE MIH User UE MIH-Register-Events.Req DL-Burst* Link-Detect MIH-Info.Resp MIH-Link-Event.Detect(link_info) MIH-Info.Req Link-Detect 802.11-AN Beacon MIHF NW MIHF NW (IS) MIH-Register-Event.Resp() Link-Event.Detect(link_info) Network Operator Link-Event.Detect(link_info) MIH-Register-Event.Req() MIH-Register-Events.Resp MIH-Info.Resp MIH-Link-Event.Detect(link_info) MIH-Info.Req Unfavorable Network Favorable Network => Selection UE Discovery and attachment

10. 21-05-0366-01-0000 NW Initiated NW Selection for Scenario-C 3G->802.x: 3G provides ES/CS services and can proxy IS services MAC Layers Beacon 3G-PDNMMEMIHF UE MIH user UE MIH-Register-Events.Req DL-Burst* Link-Detect MIHF NW MIHF NW (IS) MIH-Register-Event.Resp() Network Operator Link-Event.Detect(link_info) MIH-Register-Event.Req() MIH-Register-Events.Resp MIH-Link-Event.Detect(link_info) 802.11 Network 802.11-ANMIHF NW (IS) 802.16 Network MIHF NW (IS)802.16-AN Link-Detect Link-Event.Detect(link_info) MIH-Link-Event.Detect(link_info) MIH-Info.Req MIH-Info-Req() MIH-Info-Resp(nwk_info) MIH-Info.Resp MIH-Info-Req() MIH-Info-Resp(nwk_info) Favorable Network => Selection Just one Link Event may be generated, reporting both events Proxying: MME in operator network queries the MIHF in other networks based on the report from the UE. UE Discovery and attachment

11. 21-05-0366-01-0000 NW Controlled HO for Scenarios B&C 3G ->802.x. HO Control in 3G with MIH ES/CS services 3G-MM3G-PDNMIHF UE UE Mobile-IP Operator Network HA 802.11 Network New-FA802.11-AN MIH-Link-Switch.Req(802.11 nwk) MIH-Remote-Link-Switch.Req(802.11 nwk) L2-Procedures (Security, Re-association, QoS Neg.) Link-Event-Down(3G) Link-Event-Up(802.11 nwk) MIH-Link-Event-Up Registration-Req Registration-Resp Registration-Req Registration-Resp MIP-switch.Ind 802.11 MAC MIH-Remote-Link-Switch.Resp L2-PDP-Cntxt-Rel(3G GMM) MIH-Link-Event-Down 3G-PDP-Rel() Previously happened Mobile-IP Tunneling Mobile-IP Signaling Non-MIH (I.e. Implementation dependent) Legenda MMEMIHF NW MIH-Link-Switch.Resp(802.11 nwk) Network Selection MIH-switch.req Link-Associate MIH-switch.resp