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IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-10-0129-02-0000

Title: IEEE 802.21 Key Features

Date Submitted: July 13, 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

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IEEE 802.21 presentation release statementsThis 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.

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Overview

• IEEE Std 802.21™-2009• IEEE Standard for Local and metropolitan area networks -

Part 21: Media Independent Handover Services

• Key Features • Three services: Event Service, Command Service, and

Information Service• Defines a new functional entity called MIHF (MIH

Function)• 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 peer communication is performed through MIH Protocol

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MIH Event ServiceState Change

Predictive

Target LinkMIH Information ServiceAvailable Networks

Neighbor Maps

Network ServicesMIH Command Service

Link Connectivity Control

Client Initiated

Network Initiated

Vertical Handovers

802.21 provides ND&S mechanisms across IEEE 802 and 3G(+) networks

IEEE 802.21 MIH Key Features (2)

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PoA:L2 Point of Attachment (AP/BS)PoS: Point of ServiceMN: Mobile NodeMIH: Media Independent Handover

MIH Communication Model

Serving PoA

RP3

RP1

RP2

RP4

RP4

MIH PoS

Network Side

Client Side

RP5

RP5

Candidate PoA

Non PoA Network Entity

Non PoA Network Entity

MIH PoS

MIH PoS

MIH MIH

MN

RP4

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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

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• 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

MIH Event Service (2)

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MIH Event Service (3)

• MIH Remote Event Service Flow

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• 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

MIH Command Service

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• 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

MIH Command Service (2)

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MIH Command Service (3)

• MIH Remote Command Service Flow

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• 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.

MIH Information Service

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• Two types of information transfer• Pull Mode: GET-RESPONSE• Push Mode: One way INDICATION

• Push Model• Information can be pushed to MN by the operator• MIH Registration is mandatory for use with this push

model• MIH_Push_Information

MIH Information Service (2)

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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

• WiMAX Forum• WiFi-WiMAX IWK is based on IEEE 802.21 MIH IS

• Higher layer MIH support• Higher layer transport of MIH frames

• RFC 5677 - IEEE 802.21 Mobility Services Framework Design (MSFD) • MIHF Discovery

• RFC 5678 - Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for IEEE 802.21 Mobility Services (MoS) Discovery

• RFC 5679 - Locating IEEE 802.21 Mobility Services Using DNS

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IEEE 802.21 Current Status

• 802.21 WG• 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

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)

• Further information• IEEE Std 802.21™-2008• IEEE 802.21 Tutorial

• http://www.ieee802.org/21/Tutorials/802%2021-IEEE-Tutorial.ppt

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Thank You!

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