ieee 802.21 media independent handover dcn: 21-07-xxxx-00-0000 title: annex a.7 abnormal handover...
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IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: 21-07-xxxx-00-0000
Title: Annex A.7 abnormal handover flowDate Submitted: May 24, 2007
Presented at IEEE 802.21 session in Montreal, Canada
Authors or Source(s): Junxiang Guo
Abstract: This contribution updates Annex A.7 in accordance with the new template and new message names.
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Annex A.7
A.7 Handover flow diagram for abnormal cases
A.7.1 Example handover flow diagram for abnormal case at the stage of resource availability check
When MIH_ MN_HO_Candidate_Query Reponse message indicate the handover initiator to abort handover, the MN will initiate handover process to another suitable target PoA. The following is the handover flow diagram for this case:
Annex A.7.1
MAC-S MAC-CMIHFMIHUser
UPEntity
Mobile Node Serving Network
MIHUser
MIHUserPoS-SPoA-S
Other Network Candidate Network 1 Candidate Network n
PoA-C1 PoS-C1 MIHUserPoA-Cn PoS-Cn
Other Network
MIISServer
UPEntity
Traffic Flow over Serving Network
MIH_MN_HO_Candidate_Query.requestMIH_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 Response
MIH_N2N_HO_Query_Resources.confirm
MIH_MN_HO_Candidate_Query.response
MIH_MN_HO_Candidate_Query Response(HandoverAck= False)
MIH_MN_HO_Candidate_Query.confirm
MIH_MN_HO_Candidate_Query.request
MIH_MN_HO_Candidate_Query Request
MIH_MN_HO_Candidate_Query.indication
MIH_N2N_HO_Query_Resources.requestMIH_N2N_HO_Query_Resources Request
MIH_N2N_HO_Query_Resources Response
MIH_N2N_HO_Query_Resources.confirm
MIH_MN_HO_Candidate_Query.response
MIH_MN_HO_Candidate_Query Response(HandoverAck= TRUE)
MIH_MN_HO_Candidate_Query.confirm
Traffic Flow re-established over Candidate Network n
Handover Decision Made and Information Query for Neighboring Networks
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
Resource Availability CheckInitiate resource availability check process to a candidate network or
candidate network list
(Fail)
MIH_N2N_HO_Query_Resources.indication
MIH_N2N_HO_Query_Resources.response
Resource Availability CheckRe-initiate resource availability check
process to another candidate network or candidate network list
(Success)
Handover resource reservation, establish new L2 connection, higher layer handover execution
Figure A-9
Annex A.7.2
A.7.2 Example handover flow diagram for abnormal case at the stage of handover resource reservation
When MIH_MN_HO_Commit Response indicate the handover initiator to abort handover (Status=Unsuccess) the MN will issue MIH_MN_HO_Commit Request to another suitable target PoA, i.e. MN reuses the previous Resource Availability Query result and needs not repeat this Query process again. The following is the handover flow diagram for this case:
Resource Availability Check
Annex A.7.2Mobile Node Serving Network Other Network Candidate Network 1 Candidate Network n Other Network
MAC-S MAC-CMIHFMIHUser
UPEntity
MIHUser
MIHUserPoS-SPoA-S PoA-C1 PoS-C1 MIH
UserPoA-Cn PoS-CnMIISServer
UPEntity
MIH_MN_HO_Candidate_Query.request
MIH_MN_HO_Candidate_Query Request
MIH_MN_HO_Candidate_Query.indication
MIH_N2N_HO_Query_Resources ResponseMIH_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
MIH_N2N_HO_Query_Resources Request
Handover Decision Made and Information Query for Neighboring Networks
Traffic Flow over Serving Network
Figure A-10a
Resource Availability Check (cont.)
Mobile Node Serving Network Other Network Candidate Network 1 Candidate Network n Other Network
MAC-S MAC-CMIHFMIHUser
UPEntity
MIHUser
MIHUserPoS-SPoA-S PoA-C1 PoS-C1 MIH
UserPoA-Cn PoS-CnMIISServer
UPEntity
Annex A.7.2
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.responseMIH_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.confirm
MIH_MN_HO_Commit Response (Status=Unsuccess)
Resource Reservation (Fail)
Figure A-10b
Establish new L2 connection, higher layer handover execution
Mobile Node Serving Network Other Network Candidate Network 1 Candidate Network n Other Network
MAC-S MAC-CMIHFMIHUser
UPEntity
MIHUser
MIHUserPoS-SPoA-S PoA-C1 PoS-C1 MIH
UserPoA-Cn PoS-CnMIISServer
UPEntity
Annex A.7.2
MIH_MN_HO_Commit.request
MIH_N2N_HO_Commit Request
MIH_N2N_HO_Commit.indication
MIH_N2N_HO_Commit.responseMIH_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.confirm
MIH_MN_HO_Commit Response (Status=Success)
Resource Reservation Re-initiate a resource reservation process to another target network (Success)
Traffic Flow Re-established over Target Network n
Figure A-10c
Thank you!