21-10-0114-03-srho 1 ieee 802.21 media independent handover dcn: 21-10-0114-03-srho title: comments...
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srho 3 Optimized Single Radio Handover Key FeaturesTRANSCRIPT
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IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-10-0114-03-srhoTitle: Comments and Questions for Optimized Single Radio
Handover Procedures of WMFDate Submitted: July 13, 2010Presented at IEEE 802.21Authors or Source(s):Yoon-Young An, Junghoon Jee, Hongseok Jeon, Changmin Park, Byungjun Ahn
(ETRI)
Abstract: Comments and Questions for Optimized Single Radio Handover Procedures of WMF
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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.
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 <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html>
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.
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 stated in Section 6 of the IEEE-SA Standards Board bylaws <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf>
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Optimized Single Radio Handover Key Features
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Pre-Registration over L3 tunnel• E.g., WiMAX SFF (Signaling Forwarding Function) performs target BS (Base
Station) operations while the MS is located in non-WiMAX Access network• MAC messages transfer over L3 tunnel• Pre-registration toward target WiMAX network
BS(Target)
Serving AP
ASN-GW (MAG)
IP Core Network
AR/MAG
BS(Another Candidate)
WiMAX SFF
HA/LMA
Data
Pre-registration through L3 tunnel
ASN-GW (MAG)
HO Preparation
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Review of Detailed Procedures - WiMAX IWK case
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Overall Steps
MS WiMAXSFF BS ASN-GW AAA HA
IP CoreNetwork
Phase 2: SR Handover Session Pre-Pregistration Phase
Phase 3: SR Handover Action Phase (Pseudo Activeà Active or Pseudo Activeà Pseudo Idleà Active )
Phase 4. SR Handover Resource Revocation Phase
Phase 1: SR Target Network Detection and SFF Discovery Phase
DNS
Note: Figure from DCN 21-10-0068-00-0000 and clarification is marked as blueNote: Figure from DCN 21-10-0068-00-0000 and clarification is marked as blue
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Phase-1: SR Target Network Detection and WiMAX SFF Discovery
MS/AT SourceSystem
LocalDHCP AAA
3. DNS Query
4. DNS Answer (SFFs IP address)
1. Domain Name acquisition via DHCP
SFFInformation
ServerDNS
2. Generate FQDN for SFF discovery
802.21 Information Service Query and Response
Note: Figure from DCN 21-10-0068-00-0000 and Note: Figure from DCN 21-10-0068-00-0000 and the Information Service query is added by referencing DCN 21-10-0005-00-0000the Information Service query is added by referencing DCN 21-10-0005-00-0000
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Assumption for Phase 2&3• In case of SRHO from WiFi to WiMAX networks• Pre-registered ASN-GW includes Authenticator• Target ASN-GW is different from the pre-registered ASN• Apply CSN Anchored Mobility
• IP mobility protocol PMIP
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IKEv2 procedure to setup a secure tunnel
Phase-2: SR Handover Session Pre-Registration (1)
Phase2
MS_Attachment_Req
MS_Attachment_Ack
1. Initial Network Entry Procedure (stage3 4.5.1.1)
MS-to-Network EAP
authenticationProcess
+ IEEE 802.16eregistration
Data
DCD/UCD & BSID
Connections Establishment
MS-to-Network EAP authentication process
MS_Attachment_Rsp
WiMAXSFF
MS
WiMAX
Target ASN-GW (MAG)
LMA/HA AAA
AP/AR (MAG
)WiFi
Pre-registered ASN-
GW(MAG) /Authenticator
IP Core Networ
k
Information Server
Target BS
secure tunnel
REG_REQ
REG_RSP
Data Path Establishment
RA(with HNP)
IP Address Configuration for WiMAX Interface
AAA query with MS ID
AAA reply with profile(HNP)
WIMAX SFF starts to perform BS operation
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Phase-2: MS-initiated SRHO Preparation (2)
2. Active mode HO Preparation Procedure
• Successful
HO Preparation Phase (stage3 4.7.2.1.2) Context retrieve
DP Pre-Reg.
HO_RspMOB_BSHO_Rsp
• Successful HO Action Phase (stage3 4.7.2.2.2)
HO_Ack
MOB_MSHO_IndHO_Cnf
HO_Cnf
HO_Ack
MS
WiMAXWiFi
HO_Req
WiMAXSFF
Target ASN-GW (MAG) LMA AAA
Pre-registered ASN-
GW(MAG) /Authenticator
Information Server
MOB_MSHO_Req
HO_Ack
This message includes one or more potential target BS’s
This message initiates a handover to one of the target BSs
AP/AR (MAG
)
Target BSTarget
BS
HO_Rsp
HO_Req
HO_Ack
IP Core Network
Data
Information Server query and response
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Phase-2: Network-initiated SRHO Preparation (2)
2. Active mode HO Preparation Procedure
• Successful
HO Preparation Phase (stage3 4.7.2.1.2) Context retrieve
DP Pre-Reg.
HO_RspMOB_BSHO_REQ
• Successful HO Action Phase (stage3 4.7.2.2.2)
HO_Ack
MOB_MSHO_IndHO_Cnf
HO_Cnf
HO_Ack
MS
WiMAXWiFi
HO_Req
WiMAXSFF
Target ASN-GW (MAG) LMA AAA
Pre-registered ASN-
GW(MAG) /Authenticator
Information Server
HO_Ack
This message initiates a handover to one of the target BSs
AP/AR (MAG
)
This message includes one or more potential target BS’s
IP Core Network
Pseudo Active Timer Expire
Information Server query and response
Target BSTarget
BS
Data
HO_Req
HO_Rsp
HO_Ack
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Comments for Phase 2• During Active Mode HO Preparation procedure, suddenly WiFi
link is disconnected.• WiMAX interface of MS will perform the normal
attachment procedure.• We have to consider the reactive mode process.
12
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Phase-3: SR Handover Action
Network ReEntry
PBU
PBA
Data
• Successful HO Action Phase (stage3 4.8.5.5)
Current State Active State
MS
WiMAXWiFiWiMAX
SFF
Target ASN-GW (MAG) LMA AAAInformation
ServerTarget
BS
Pre-registered ASN-
GW(MAG) /Authenticator
Anchor_DPF_HO_Trigger
Anchor_DPF_HO_Req
Anchor_DPF_Relocate_Req
Anchor_DPF_Relocate_Rsp
Access-Request/MAR
Access-Accept/MAA
Anchor_DPF_HO_Rsp
Anchor_DPF_Relocate_Ack
Context_Rpt(Anchor ASN GW ID)
Context_Ack
AP/AR (MAG)
HO Latency in SRHO
Bi-Dir tunnel
IP Core Network
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Comments for Phase 3
• WiMAX forum applied ASN anchored mobility(state 3 4.7) to single radio inter-RAT HO procedures
• Inter-RAT HO needs IP mobility(MIP, PMIP).• CSN anchored mobility has IP mobility function.