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Presentation on theme: "IEEE MEDIA INDEPENDENT HANDOVER DCN: srho"— Presentation transcript:

1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-10-0022-00-srho
Title: WiMAX-WiFi Interworking Discussion from Date Submitted: January 13, 2009 Presented at IEEE session #36 in San Diego Authors or Source(s):  Subir Das (Telcordia) Abstract: Understanding of and for discussion only xx-00-0sec

2 IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE 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 The contributor is familiar with IEEE patent policy, as stated in Section 6 of the IEEE-SA Standards Board bylaws < and in Understanding Patent Issues During IEEE Standards Development sec

3 WiMAX – WiFi Network Ref. Model
Source: xx-00-0sec

4 Interworking Functional Decomposition
Is this W3 or something else? New Source: xx-00-0sec

5 Definitions WiMAX SFF WiFi SFF Reference Point Rx
Source: xx-00-0sec

6 Definitions Reference Ry Reference Point W1 Reference Point W3
Source: xx-00-0sec

7 SR WiMAX-WiFi Handover
Source: xx-00-0sec

8 Call Flow Description Source: xx-00-0sec

9 Understanding of WiFi SFF?
Has a layer-3 interface towards WiMAX network and Layer-2 interface towards WiFi network ( this interface is TBD) It does not have any AP fucntionality Allows MS to establish an IP tunnel securely Creates a L2 tunnel with WiFi AN authenticator securely Receives IP packets from MS through the tunnel and then creates (NOT just forwards) L2 packets destined to WiFi authenticator, discovers the WiFi AN and routes them Is this true? If so, what is the source MAC address of this packet? It is not clear from the description that to which MAC address STA sends the EAPOL-Start message? xx-00-0sec

10 Understanding of WiFi SFF (contd)?
When WiFi SFF receives the packets from WiFi authenticator, does it change the source MAC address of the packet and then creates an IP packet destined to MS? xx-00-0sec

11 Understanding of MS ? MS WiFi interface Transmitter is off but Receiver is always on MS knows WiFi SFF IP address Target AN’s BSSID Target AP’s MAC address MS does NOT know WiFi authenticator MAC address (e.g.,thin AP model) xx-00-0sec

12 Relevance to 802.21a Discussion?

13 Proactive Pull Key Distribution (802.21a Discussion)
1) PoS- MIA MIH User for MS Key Mng. MIH User for MI MSK’/rMSK’ auth L2 frames MIHF ** 2) Target MSA MSK/rMSK MAC auth L2 frames AAA* *Different AAA servers may be used for different media **Another alternative: MIHF directly receives/sends auth. L2 frames from/to the MAC Source:

14 Mapping to SR WiMAX- WiFi Interworking
1) Optional MIH User for MS Key Mng. (Optional) MIH User for MI WiFi SFF (with MIHF+) MSK’/EMSK’ Ry W1 MIHF auth L2 frames 2) Target AN MSK2/EMSK2 MAC auth L2 frames AAA Source:


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