IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-11-0179-00-srho Title: IEEE 802.21c Protocol Design Consideration Date Submitted: Nov. 09, 2011 Presented at IEEE 802.21 session #47 in Atlanta Authors or Source(s): Hyunho Park, Junghoon Jee, Changmin Park Abstract: This contribution introduces protocols of the previous IEEE 802.21 Std. and WiMAX interworking with a Non-WiMAX network and then deals with considerations for IEEE 802.21 protocol design. 21-11-0179-00-srho 1 1

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Contents IEEE 802.21c Protocol Stack IEEE 802.21 Protocol R9 Protocol Considerations 21-11-0179-00-srho 3

IEEE 802.21c Protocol Stacks (1/2) SRCF (Single Radio handover Control Function) MICF (Media Independent Control Function Service Access Points MICSAP (Media Independent Control Service Access Point) MiCLSAP (Media Independent Control Link-layer Service Access Point) 21-11-0179-00-srho 4

IEEE 802.21c Protocol Stacks (2/2) Transport of the target radio L2 control frame as a payload of a media independent control frame Cross-layer encapsulation 21-10-0093-00-0000

IEEE 802.21 Protocol IEEE 802.21 Protocol Stack 21-11-0179-00-srho 6

IEEE 802.21 Primitives MIH_LINK_SAP primitives For Event Service: Link_Detected, Link_Up, Link_Down, Link_Parameters_Report, Link_Going_Down, Link_Handover_Imminent, Link_Handover_Complete, Link_PDU_Transmit_Status For Command Service: Link_Capability_Discover, Link_Event_Discover, Link_Event_Subscribe, Link_Event_Unsubscribe, Link_Get_Parameters, Link_Configure_Thresholds, Link_Action MIH_NET_SAP primitives For Network Communication: MIH_TP_Data 21-11-0179-00-srho 7

IEEE 802.21 Primitives (Cont’d) MIH_SAP primitives For Service Management: MIH_Capability_Discover, MIH_Register, MIH_DeRegister, MIH_Event_Subscribe, MIH_Event_Unsubscribe, For Event Service: MIH_Link_Detected, MIH_Link_Up, MIH_Link_Down MIH_Link_Parameters_Report, MIH_Link_Going_Down, MIH_Link_Handover_Imminent, MIH_Link_Handover_Complete, MIH_Link_PDU_Transmit_Status For Command Service: MIH_Link_Get_Parameters, MIH_Link_Configure_Thresholds, MIH_Link_Actions, MIH_Net_HO_Candidate_Query, MIH_MN_HO_Candidate_Query, MIH_N2N_HO_Query_Resources, MIH_MN_HO_Commit, MIH_Net_HO_Commit, MIH_N2N_HO_Commit, MIH_MN_HO_Complete, MIH_N2N_HO_Complete For Information Service: MIH_Get_Information, MIH_Push_Informatiion 21-11-0179-00-srho 8

MIH Protocol Format MIH protocol general frame format MIH protocol header format 21-11-0179-00-srho

MIH protocol header format Version: version of MIH protocol used (0: Not to be used/ 1: First version/ 2-15: (Reserved)) ACK-Req: requesting an acknowledgement for the message ACK-Rsp: responding to the request for an acknowledgement for the message UIR (Unauthenticated Information Request): Indicates if the protocol is sent in pre-authentication/ pre-association state M (More fragment) FN (Fragment Number) MIH Message ID (MID) SID (Service identifier): 1Service Management/ 2 Event Service/ 3 Command Service/ 4 Information Service Opcode (Operation code): 1Request/ 2Response, 3Indication AID (Action identifier): Indicates the action to be taken with regard to the SID Transaction ID: matches Request and Response, as well as matching Request, Response and indication to an ACK 21-10-0093-00-0000

R9 Protocol R9 Interface 21-11-0179-00-srho 11

Protocol Stack between MS and WiMAX SFF 21-11-0179-00-srho 12

R9 Protocol Header MTI (Message Type Indicator): 0R9 Control Message/ 1802.16e MAC Message B: 0BSID is omitted/ 1BSID is included Reserved: reserved for future use MSID: 6-byte 802.16 MAC address of MS BSID: 6-byte Target WiMAX BS identity 802.16e MAC PDU: Encapsulated 802.16e MAC PDU 21-11-0179-00-srho 13

Considerations Primitives for Single Radio Handover Compatibility with Previous IEEE 802.21 Standard Compatibility with R9 Protocol 21-11-0179-00-srho 14

References IEEE 802.21c draft: 21-11-0155-04-srho IEEE Std 802.21TM-2008 WMF-T37-011-R016v01: WiMAX ForumTM Network Architecture- Detailed Protocols and Procedures, Single Radio Interworking between Non-WiMAX and WiMAX Access Networks 21-11-0179-00-srho 15