IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-10-0129-01-0000 Title: IEEE 802.21 Key Features Date Submitted: July 12, 2010 Presented at IEEE 802.21 session #39 in San Diego Authors or Source(s): Junghoon Jee (ETRI) jhjee@etri.re.kr Abstract: This contribution highlights the key features of IEEE 802.21 defines MIH services to facilitate the discussion with IEEE 802.19.1 TG 21-10-0129-01-0000 1 1

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Overview IEEE Std 802.21™-2008 IEEE Standard for Local and metropolitan area networks - Part 21: Media Independent Handover Services Beyond Handover, Toward “Multi-Radio Services” Main objective was to minimize interruption (e.g., packet loss, latency, etc.) Contains mechanisms to enable Network Discovery & Selection among heterogeneous network environments Therefore, applicable to overall Multi-Radio interworking problem space Coexistence, Resource Mgmt., Power mgmt., Bearer and Service Optimization Relevant Efforts IEEE 802.21 Wireless Network Management SG IEEE 802.23 Emergency Services Working Group IEEE 802.21 Multi-Radio Power Management SG (past) 21-10-0129-01-0000

Initial Motivations to launch 802.21 Fill the gab between Mobility Management Protocols (MMP) and lower layer MAC Lower layer information is required to optimize MMP Radio Status (LGD, LU, LD) Target PoA Inter-RAT ND&S Impossible to deliver other radio conditions through current serving radio MS’s available neighboring network at the current location? Define the IEEE 802 Standard for: Standard way to deliver lower layer link information to higher layer (e.g., by defining MAC_SAP primitives) Standardize way to represent and heterogeneous neighboring network information and share among MS and Network Mechanisms to enable the higher layers to control the lower layer behavior (e.g., connectivity, scanning) 21-10-0129-01-0000

IEEE 802.21 MIH Key Features Key provided MIH Service categorization Event Service, Command Service, Information Service MIHF Entity (MIH Functional Entity) An entity having one or more of MIH Facilitates Multi-Radio network discovery and selection Provides abstracted services to higher layers. Communicates with the lower layers of the mobility-management protocol stack through technology-specific interfaces. MIH Communication Remote MIHF peer entities communicates through MIH protocol frames REQUEST and RESPONSE One way INDICATION 21-10-0129-01-0000

IEEE 802.21 MIH Key Features (2) MIH Event Service State Change Predictive Target Link MIH Information Service Available Networks Neighbor Maps Network Services MIH Command Service Link Connectivity Control Client Initiated Network Initiated Vertical Handovers 802.21 provides seamless vertical handover solution across IEEE 802 and 3G(+) networks 21-10-0129-01-0000

MIH Communication Model Candidate PoA Network Side MIH PoS Client Side RP2 RP4 RP5 MIH MIH PoS MIH RP1 Serving PoA RP4 MN Non PoA Network Entity RP5 RP4 RP3 MIH PoS Non PoA Network Entity PoA:L2 Point of Attachment (AP/BS) PoS: Point of Service MN: Mobile Node MIH: Media Independent Handover 21-10-0129-01-0000

MIH Event Service Enables the higher layers (L3 or above) to capture the radio link status in a standard manner Mapping media specific link layer events to Media Independent Events Link layer events From specific link layers to MIHF MIH events From MIHF to higher layers 21-10-0129-01-0000

MIH Event Service (2) Remote Events MIH events between different MIH entities Event lists (MIH) Link_Detected.indication (MIH) Link_Up.indication (MIH) Link_Down.indication (MIH) Link_Parameters_Report.indication (MIH) Link_Going_Down.indication (MIH) Link_Handover_Imminent.indication (MIH) Link_Handover_Complete.indication (MIH) Link_PDU_Transmit_Status.indication 21-10-0129-01-0000

MIH Event Service (3) MIH Remote Event Service Flow 21-10-0129-01-0000

MIH Command Service Enables the higher layers to control the link connectivity Remote communication among peer MIHF entities Link commands From MIH to link layers MIH commands From upper layer to MIH 21-10-0129-01-0000

MIH Command Service (2) Command lists MIH_Capability_Discover MIH_Register/MIH_Deregister MIH_Event_Subscribe/MIH_Event_Unsubscribe MIH_Link_Actions MIH_Link_Get_Parameters MIH_Net_HO_Candidate_Query, MIH_MN_HO_Candidate_Query MIH_N2N_HO_Query_Resources MIH_Net_HO_Commit, MIH_MN_HO_Commit MIH_MN_HO_Complete, MIH_N2N_HO_Complete MIH_Get_Information MIH_Push_Information 21-10-0129-01-0000

MIH Command Service (3) MIH Remote Command Service Flow 21-10-0129-01-0000

MIH Information Service Provides a framework and corresponding mechanisms to discover and obtain surrounding heterogeneous network information Information Elements (IEs) General overview of network Location of PoAs, IP version, Operator Link layer parameters Channel, frequency, PHY types, data rates, Supported higher layer services or applications at the access network MIP, VPN, SIP, etc. 21-10-0129-01-0000

MIH Information Service (2) Two types of information transfer Pull Mode: GET-RESPONSE Push Mode: One way INDICATION Added from IEEE 802.21/D12.0 Push Model Information can be pushed to MN by the operator MIH Registration is mandatory for use with this push model MIH_Push_Information 21-10-0129-01-0000

Relationship with other Groups Media specific changes IEEE 802.11 IEEE 802.16 MIH capability support in L2 MAC frames MAC container to deliver MIH frames over L2 L2 SAP extensions to support MIHF Higher layer MIH support Higher layer transport of MIH frames RFC 5677 - IEEE 802.21 Mobility Services Framework Design (MSFD) 2009-12 RFC 5677 (Proposed Standard) MIHF Discovery RFC 5679 - Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for IEEE 802.21 Mobility Services (MoS) Discovery 2009-12 RFC 5678 (Proposed Standard) RFC 5679 - Locating IEEE 802.21 Mobility Services Using DNS 2009-12 RFC 5679 (Proposed Standard) 21-10-0129-01-0000

IEEE 802.21 Prehistory Jan 2003 March 2003 May 2003 July 2003 Sept 2003 Nov 2003 Jan 2004 Mar 2004 802 Handover Tutorial First Meeting of ECSG PAR & 5C Submission Initial WG Meeting CFI. 802 Handover ECSG Formed by SEC EC PAR Approval CFI : http://www.ieee802.org/21/archived_docs/Documents/802_Handoff_CFIr1.pdf ECSG Docs :http://www.ieee802.org/21/archived_docs/ 21-10-0129-01-0000

IEEE 802.21 History & Timeline 2008-2009 802.21 WG Created 14 Initial Proposals Letter Ballot Sponsor Ballot* Initiate Amendments to 802.11u, 802.16g. IETF (MIPSHOP) on L3 802.21 Spec Published Call For Proposals Down selection Initial 802.21 Draft Text 21-10-0129-01-0000

IEEE 802.21 Current Status 802.21 WG 802.21a TG 802.21b TG Baseline specification completed in 2008 Leadership Change from March 2010 Chair: Subir Das (Telcordia), Vice Chair: Juan Carlos Zuniga (InterDigital), Secretary: Anthony Chan (Huawei) 802.21a TG Security Extensions to Media Independent Handover Services MIH Secure Signaling, Optimized Authentication Chair: Yoshihiro Ohba (Toshiba), Editor: Lily Chen (NIST) Proposal discussion 802.21b TG Handovers for Downlink only Technologies (T-DMB, DVB-H, Media-FLO) Chair: Juan Carlos Zuniga (InterDigital), Vice Chair: Burak Simsek (Fraunhofer) , Editor: Hongseok Jeon (ETRI) Preparing Letter Ballot 21-10-0129-01-0000

IEEE 802.21 Current Status (2) 802.21c TG Optimized Single Radio Handover Solutions Chair: Junghoon Jee (ETRI), Vice Chair: Anthony Chan (Huawei) Proposal Discussion 802.21 Wireless Network Management SG Chair: Johannes Lessmann (NEC) Preparing PAR and 5C Related Work Emergency Service: 802.23 WG Multi-Radio Power Management SG (past) 21-10-0129-01-0000

Thank You! Further information IEEE Std 802.21™-2008 IEEE 802.21 Tutorial http://www.ieee802.org/21/Tutorials/802%2021-IEEE-Tutorial.ppt 21-10-0129-01-0000