1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN:
Title: MIH Handover Diagrams
Date Submitted: April 17, 2008
Authors or Source(s):
Junghoon Jee, Yeonkwon Jeong, Hongseok Jeon, Changmin Park
Abstract:
The updated handover diagrams for the mobile-initiated and network-initiated cases to resolve the SB Recirculation-2 are provided.

2. IEEE 802.21 presentation release statements:
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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

3. L.1 Mobile-initiated handover procedure - Description
The Mobile-initiated Handover Procedure operates as follows:
Mobile Node is connected to the serving network via Current PoS and it has access to MIH Information Server.
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 is attempted as soon as Mobile Node is first attached to the network.
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.
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.
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.
Mobile Node decides the target of the handover and notifies the Serving PoS of the decided target net-work information by sending the MIH_MN_HO_Commit request message. Also, the Mobile Node commits a link switch to the target network interface by invoking the MIH_Link_Actions.request primitive.

4. L.1 Mobile-initiated handover procedure - Description (cont.)
Serving PoS sends the 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.
The new layer 2 connection is established and a certain mobility management protocol procedures are carried out between Mobile Node and target network.
Mobile Node sends 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 sends MIH_MN_HO_Complete Response to Mobile Node.

5. L.1 Mobile-initiated handover procedure - Figure L-1
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Information Query
MIH_Get_Information.request
MIH_Get_Information Request
MIH_Get_Information Response
MIH_Get_Information.confirm
Resource Availability Check
MIH_MN_HO_Candidate_Query.request
MIH_MN_HO_Candidate_Query Request
MIH_MN_HO_Candidate_Query.indication
MIH_N2N_HO_Query_Resources.request
MIH_N2N_HO_Query_Resources Request
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
MIH_N2N_HO_Query_Resources Response
MIH_N2N_HO_Query_Resources.confirm
MIH_N2N_HO_Query_Resources.request
MIH_N2N_HO_Query_Resources Request
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
MIH_N2N_HO_Query_Resources Response
MIH_N2N_HO_Query_Resources.confirm

6. L.1 Mobile-initiated handover procedure (2) - Figure L-1a
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Resource Availability Check (cont.)
MIH_MN_HO_Candidate_Query.response
MIH_MN_HO_Candidate_Query Response
MIH_MN_HO_Candidate_Query.confirm
Resource Preparation
Establish new L2 connection
Using Link_Action.request
MIH_MN_HO_Commit.request
MIH_MN_HO_Commit Request
MIH_MN_HO_Commit.indication
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_MN_HO_Commit.response
MIH_MN_HO_Commit Response
MIH_MN_HO_Commit.confirm
MIH_Link_Actions.request
MIH_Link_Actions.confirm

7. L.1 Mobile-initiated handover procedure (3) - Figure L-1b
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Link Up Indication
Link_Up.indication
MIH_Link_Up.indication
IP connectivity restored
Higher Layer Handover Execution
Traffic Flow re-established
Resource Release
MIH_MN_HO_Complete.request
MIH_MN_HO_Complete Request
MIH_MN_HO_Complete.indication

8. L.1 Mobile-initiated handover procedure (4) - Figure L-1c
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Resource Release
(cont.)
MIH_N2N_HO_Complete.request
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

9. L.2 Network-initiated handover procedure - Description
The Network-initiated Handover Procedure operates as follows:
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.
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.
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.
Serving PoS decides the target of the handover based on the available resource status at candidate net-works.
Serving PoS sends MIH_N2N_HO_Commit Request to Target PoS to prepare resource at the target net-work. Target PoS responds the result of the resource preparation by sending MIH_N2N_HO_Commit Response.
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.

10. L.2 Network-initiated handover procedure - Description (cont.)
New layer 2 connection is established and Mobile Node sends MIH_Net_HO_Commit Response to Serv-ing PoS.
After higher layer handover execution, Mobile Node sends 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 sends MIH_MN_HO_Complete Response to Mobile Node.

11. L.2 Network-initiated handover procedure -Figure L-2
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Information Query
MIH_Get_Information.request
MIH_Get_Information Request
MIH_Get_Information Response
MIH_Get_Information.confirm
Resource Availability Check
MIH_Net_HO_Candidate_Query.request
MIH_Net_HO_Candidate_Query Request
MIH_Net_HO_Candidate_Query.indication
MIH_Net_HO_Candidate_Query.response
MIH_Net_HO_Candidate_Query Response
MIH_Net_HO_Candidate_Query.confirm

12. L.2 Network-initiated handover procedure -Figure L-2a
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Resource Availability Check (cont.)
MIH_N2N_HO_Query_Resources.request
MIH_N2N_HO_Query_Resources Request
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
MIH_N2N_HO_Query_Resources Response
MIH_N2N_HO_Query_Resources.confirm
MIH_N2N_HO_Query_Resources.request
MIH_N2N_HO_Query_Resources Request
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
MIH_N2N_HO_Query_Resources Response
MIH_N2N_HO_Query_Resources.confirm

13. L.2 Network-initiated handover procedure -Figure L-2b
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Target Decision
Resource Preparation
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.request
MIH_Net_HO_Commit Request
Establish new L2 connection
using Link_Action.request
MIH_Net_HO_Commit Response (Status = Success)
MIH_Net_HO_Commit.confirm

14. L.2 Network-initiated handover procedure -Figure L-2c
Mobile Node
Serving Network
Other Network
Candidate Network 1
Candidate Network n
Other Network UP
Entity
MIH
User
MIHF
MAC-S
MAC-C
PoA-S
PoS-S
MIH
User
MIIS
Server
PoA-C1
PoS-C1
MIH
User
PoA-Cn
PoS-Cn
MIH
User UP
Entity
Link Up Indication
Link_Up.indication
MIH_Link_Up.indication
IP connectivity restored
Higher Layer Handover Execution
Traffic Flow re-established
Resource Release
MIH_MN_HO_Complete.request
MIH_MN_HO_Complete Request
MIH_MN_HO_Complete.indication
MIH_N2N_HO_Complete.request
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