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IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-11-0072-00-srho

Title: Consideration for Tunneling of Network Entry Procedure (IEEE 802.16)

Date Submitted: May, 2011

Presented at IEEE 802.21c

Authors or Source(s):Yoon Young An, Junghoon Jee, Changmin Park, Hea Sook Park (ETRI)

Abstract: Consideration for Tunneling of Network Entry Procedure

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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> 

IEEE 802.21c Single Radio Tunneling for Network Entry

Procedure(IEEE 802.16)

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Contents

• IEEE 802.16 Network Entry Procedures• Initial Network Entry• Registration

• IEEE 802.21c Tunneling for IEEE 802.16• Considerations and Issues

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IEEE 802.16 Network Entry Procedures

• Pre-registration Process(Process 3)• Network Entry Procedures through the tunnel btwn MN and

Target C-GW

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MN Source network

Information repository Candidate target network 1 Candidate target network n

Source radio C-GW 1 Candidate PoA C-GW n Candidate

PoA

1. Network discovery

2. Handover decision

Target network

Target radio C-GW Target PoA

3. Proactive authentication, pre-registration

4. Target link preparation

5. SRHO execution

Note: Overall Single Radio Handover Procedures from SRHO proposal documentNote: Overall Single Radio Handover Procedures from SRHO proposal document

IEEE 802.16 Network Entry Procedures

• Pre-registration Process for WLAN to WiMAX SRHO• The procedure for initialization of a SS

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a. Scanning and DL/UL parameter acquisition

b. Ranging

c. Negotiation Basic capability

d. Authorization and Key exchange

e. Registration

f. Establishment IP connectivity

g. Establishment ToD

h. Transfer Operational Parameters

i. Establishment provisioned connection

Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

Scanning and DL/UL parameter acquisition

• Process in the SS• On initialization or after signal

loss, the SS shall acquire a DL ch.

• The PHY has achieved sync.• Receive the DL-MAP (Lost DL-

MAP interval) and DCD (T1 interval) messages

• SS receives a UCD message for UL ch.

• UL parameters are valid after receiving UL-MAP messages.

• If no UL ch. can be found after timeout period, the SS shall continuous scanning for another DL ch.

7Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

Ranging

• The process of acquiring the correct timing offset and power adjustments

8Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

Negotiate Basic Capabilities & Authorization/Key Exchange

• Negotiate Basic Capabilities • SBC_REQ : SS’s capabilities set to “on”• SBC_RSP : SS’s and BS’s capabilities set to “on”

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• Authorization & Key Exchange• If PKM is enabled, the BS and SS shall perform authorization and

key exchange.

SS BS

SBC_REQ

SBC_RSP

Registration

• Registration• The process by which the SS is allowed entry into the network• REG-REQ and REG_RSP include IP version

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SS BS

REG_REQ

REG_RSP

Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

Options (for managed SS)

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• Establishment of IP connectivity • Establishing time of day (RFC868)

• Transfer of Operational Parameters (after DHCP)

Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

Establishing provisioned connections

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• Establish provisioned connections• Creation of service flows may be initiated by either BS (mandatory

capability) or by SS (optional capability)

SS-Initiated BS-Initiated

Note: Figure from IEEE Std 802.16Note: Figure from IEEE Std 802.16

IEEE 802.16 Network Entry Procedures through the tunnel

• SFF emulates the PoA using the tunnel between MS and C-GW through the source network.

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MS

WiMAX WiFi

Target PoA

DHCPAAAInformation Repository

Source(WiFi)Network

WiMAXCNS

RNG_RSP

REG_REQ

REG_RSP

MS_Attachment_Req

MS_Attachment_Rsp

MS_Attachment_Ack

C-GW

SFF ASN-GW/ Authenticator

WiMAXANS

RNG_REQ

DL-MAP, DCD, UCD, UL-MAP

Tunnel Establishment procedure

SBC_RSP

SBC_REQ

Authorization & Key Exchange

DSA-REQ(SFID, CID, QoS parameters)

DSA_RSP

DSA_ACK

(a)

(b)

(c)

(d)

(e)

(i)

Tunneling for IEEE 802.16

• Considerations or issues• How will we make the tunnel for pre-registration?

• R9 Tunnel : WiMAX defines R9 protocol header• MIH Tunnel

– Define the MIH message header for Tunneling• Need the compatibility between R9 tunnel and MIH

tunnel?• L2 Messages through Tunnel

• Originally, DL-MAP, UL-MAP, DCD and UDC are sent periodically from BS to MS.

• SFF emulates virtual BS.• Can SFF send these messages periodically to MS

through the tunnel?• One method is MS to request these messages to SFF

using new MIH message.• Another method ???

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