1. 21-07-0010-02-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-07-0010-02-0000 Title: Mobile-initiated and network-initiated handover procedure Date Submitted: May 16, 2007 Presented at IEEE 802.21 session in Montreal, Canada Authors or Source(s): Junghoon Jee, Eunah Kim Abstract: This contribution proposes updated procedures of mobile-initiated and network initiated handover in Annex A.1 and A.2 in accordance with the new template and new message names.

2. 21-07-0010-02-0000 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 IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s 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. 21-07-0010-02-0000 Resource Availability Check Information Query A.1 Mobile-initiated handover procedure Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity MIH_Get_Information.request MIH_Get_Information Request MIH_Get_Information Response MIH_Get_Information.confirm MIH_MN_HO_Candidate_Query.request MIH_MN_HO_Candidate_Query Request MIH_MN_HO_Candidate_Query.indication MIH_N2N_HO_Query_Resources Response MIH_N2N_HO_Query_Resources.response MIH_N2N_HO_Query_Resources Request MIH_N2N_HO_Query_Resources.indication MIH_N2N_HO_Query_Resources.confirm MIH_N2N_HO_Query_Resources Response MIH_N2N_HO_Query_Resources.indication MIH_N2N_HO_Query_Resources.response MIH_N2N_HO_Query_Resources.confirm MIH_N2N_HO_Query_Resources.request MIH_N2N_HO_Query_Resources Request

4. 21-07-0010-02-0000 Resource Preparation Resource Availability Check (cont.) Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity A.1 Mobile-initiated handover procedure (2) MIH_MN_HO_Candidate_Query Response (Handover Ack = TRUE) MIH_MN_HO_Candidate_Query.response MIH_MN_HO_Candidate_Query.confirm MIH_MN_HO_Commit.request MIH_N2N_HO_Commit Request MIH_N2N_HO_Commit.indication MIH_N2N_HO_Commit.response MIH_N2N_HO_Commit Response MIH_N2N_HO_Commit.confirm MIH_MN_HO_Commit Request MIH_MN_HO_Commit.indication MIH_N2N_HO_Commit.request MIH_MN_HO_Commit.response MIH_MN_HO_Commit Response MIH_MN_HO_Commit.confirm

5. 21-07-0010-02-0000 Resource Release A.1 Mobile-initiated handover procedure (3) Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity Establish new L2 connection Using Link_Action.request Higher Layer Handover Execution Link Up Indication IP connectivity restored Link_Up.indication MIH_Link_Up.indication Traffic Flow re-established MIH_MN_HO_Complete Request MIH_MN_HO_Complete.request MIH_MN_HO_Complete.indication

6. 21-07-0010-02-0000 Resource Release (cont.) Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity A.1 Mobile-initiated handover procedure (4) MIH_N2N_HO_Complete Request MIH_N2N_HO_Complete.indication MIH_N2N_HO_Complete.response MIH_N2N_HO_Complete Response MIH_N2N_HO_Complete.confirm MIH_MN_HO_Complete.response MIH_MN_HO_Complete Response MIH_MN_HO_Complete.confirm MIH_N2N_HO_Complete.request

7. 21-07-0010-02-0000 A.1 Mobile-initiated handover procedure (5) The Mobile-initiated Handover Procedure operates as follows: 1) Mobile Node is connected to the serving network via Current PoS and it has access to MIH Information Server. 2) Mobile Node queries information about neighboring networks by sending the MIH_Get_Information Request to Information Server. Information Server responds with MIH_Get_Information Response. This information query may be attempted as soon as Mobile Node is first attached to the network. 3) Mobile Node triggers a mobile-initiated handover by sending MIH_MN_HO_Candidate_Query Request to Serving PoS. This request contains the information of potential candidate networks. 4) Serving PoS queries the availability of resources at the candidate networks by sending MIH_N2N_HO_Query_Resources Request to one or multiple Candidate PoSs. 5) Candidate PoSs respond with MIH_N2N_HO_Query_Resources Response and Serving PoS notifies the Mobile Node of the resulting resource availability at the candidate networks through MIH_MN_HO_Candidate_Query Response. 6) Mobile Node decides the target of the handover and requests resource preparation by sending the MIH_MN_HO_Commit Request to Serving PoS. 7) Serving PoS sends MIH_N2N_HO_Commit Request to Target PoS to request resource preparation at the target network. Target PoS responds the result of the resource preparation by MIH_N2N_HO_Commit Response. 8) When the resource is successfully prepared, Serving PoS sends MIH_MN_HO_Commit Response to Mobile Node. 9) New layer 2 connection is established and a certain mobility management protocol procedures are carried out between Mobile Node and target network. 10) Mobile Node may send MIH_MN_HO_Complete Request to Target PoS. Target PoS sends MIH_N2N_HO_Complete Request to previous Serving PoS to release resource which was allocated to Mobile Node. After identifying that resource is successfully released, Target PoS may send MIH_MN_HO_Complete Response to Mobile Node.

8. 21-07-0010-02-0000 Resource Availability Check Information Query A.2 Network-initiated handover procedure Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity MIH_Get_Information.request MIH_Get_Information Request MIH_Get_Information Response MIH_Get_Information.confirm MIH_Net_HO_Candidate_Query.request MIH_Net_HO_Candidate_Query Request MIH_Net_HO_Candidate_Query.indication MIH_Net_HO_Candidate_Query.confirm MIH_Net_HO_Candidate_Query Response MIH_Net_HO_Candidate_Query.response

9. 21-07-0010-02-0000 Resource Availability Check (cont.) Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity MIH_N2N_HO_Query_Resources Response MIH_N2N_HO_Query_Resources.response MIH_N2N_HO_Query_Resources Request MIH_N2N_HO_Query_Resources.indication MIH_N2N_HO_Query_Resources.confirm MIH_N2N_HO_Query_Resources Response MIH_N2N_HO_Query_Resources.indication MIH_N2N_HO_Query_Resources.response MIH_N2N_HO_Query_Resources.confirm MIH_N2N_HO_Query_Resources.request A.2 Network-initiated handover procedure (2) MIH_N2N_HO_Query_Resources.request MIH_N2N_HO_Query_Resources Request

10. 21-07-0010-02-0000 Resource Preparation Establish new L2 connection Using Link_Action.request A.2 Network-initiated handover procedure (3) Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity Target Decision MIH_Net_HO_Commit.request MIH_Net_HO_Commit Request MIH_N2N_HO_Commit.request MIH_N2N_HO_Commit Request MIH_N2N_HO_Commit.indication MIH_N2N_HO_Commit.response MIH_N2N_HO_Commit Response MIH_N2N_HO_Commit.confirm MIH_Net_HO_Commit Response (Status = Success) MIH_Net_HO_Commit.confirm

11. 21-07-0010-02-0000 Resource Release Higher Layer Handover Execution Link Up Indication Mobile NodeServing NetworkOther NetworkCandidate Network 1Candidate Network nOther Network MAC-SMAC-CMIHF MIH User UP Entity MIH User MIH User PoS-SPoA-SPoA-C1PoS-C1 MIH User PoA-CnPoS-Cn MIIS Server UP Entity MIH_N2N_HO_Complete Request MIH_N2N_HO_Complete.indication MIH_N2N_HO_Complete.response MIH_N2N_HO_Complete Response MIH_N2N_HO_Complete.confirm MIH_N2N_HO_Complete.request MIH_MN_HO_Complete Request MIH_MN_HO_Complete.request MIH_MN_HO_Complete.indication MIH_MN_HO_Complete.response MIH_MN_HO_Complete Response MIH_MN_HO_Complete.confirm A.2 Network-initiated handover procedure (4) IP connectivity restored Link_Up.indication MIH_Link_Up.indication Traffic Flow re-established

12. 21-07-0010-02-0000 A.2 Network-initiated handover procedure (5) The Network-initiated Handover Procedure operates as follows, 1)Serving PoS sends MIH_Get_Information Request to Information Server to get neighboring network information and Information Server responds by sending MIH_Get_Information Response. 2)Serving PoS triggers a network-initiated handover by sending MIH_Net_HO_Candidate_Query Request to Mobile Node. The MN responds through MIH_Net_HO_Candidate_Query Response which contains Mobile Node's acknowledgement about the handover and its preferred link and PoS lists. 3)Serving PoS sends MIH_N2N_HO_Query_Resources Request to one or more Candidate PoSs to check the availability of the resource at candidate networks. Candidate PoS responds by sending MIH_N2N_HO_Query_Resources Response to Serving PoS. 4)Serving PoS decides the target of the handover based on the available resource status at candidate networks. 5)Serving PoS sends MIH_N2N_HO_Commit Request to Target PoS to prepare resource at the target network. Target PoS responds the result of the resource preparation by sending MIH_N2N_HO_Commit Response. 6)After identifying that resource is successfully prepared, Serving PoS commands Mobile Node to commit handover toward the specified network type and PoA through MIH_Net_HO_Commit Request. 7)New layer 2 connection is established and Mobile Node sends MIH_Net_HO_Commit Response to Serving PoS. 8)After higher layer handover execution, Mobile Node may send MIH_MN_HO_Complete Request to Target PoS. Target PoS sends MIH_N2N_HO_Complete Request to previous Serving PoS to release resource which was allocated to Mobile Node. After identifying that resource is successfully released, Target PoS may send MIH_MN_HO_Complete Response to Mobile Node.