1. 802.11u Proposal Date: 2005-09-10 Authors: September, 2005 July 2005
doc.: IEEE /0721r0
September, 2005
802.11u Proposal
Date:
Authors:
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Yao Zhonghui, Huawei
Cheng Hong, Panasonic

2. July 2005
doc.: IEEE /0721r0
September, 2005
Abstract
This presentation gives a summary of the general problems of interworking from u requirements and gives a solution on some of these problems.
Yao Zhonghui, Huawei
Cheng Hong, Panasonic

3. Outline General Questions on Interworking 802.11u Architecture
September, 2005
Outline
General Questions on Interworking
802.11u Architecture
Network Selection
Visual STA
Yao Zhonghui, Huawei

4. General Questions on Interworking
September, 2005
General Questions on Interworking
Interworking
Capability
Network Selection
External Network
Information
Security Consideration
Network Sharing
SSPN Interface
STA Sharing
Multi-Credentials
Yao Zhonghui, Huawei

5. External Network Information
September, 2005
External Network Information
From requirement:
Network Selection
A STA whether its subscription to an SSPN would allow it to access a particular AN
which interworking services are available
APs can advertise (before connection) the charges that will be made for use of the network if connection is authorized based on an SSPN subscription.
MIH Support
Provide a transport mechanism for MIH related information elements in state 1: unauthenticated, unassociated (class 1 frames)
Yao Zhonghui, Huawei

6. Interworking Capability
September, 2005
Interworking Capability
From requirement:
Online Enrollment
R0E1: Define functionality by which the STA is able to determine what online enrolment (also called online subscription) methods are supported by the network.
R0E4: Functionality shall be provided by which APs can advertise (before connection) the charges that will be made for use of the network if a user enrolls with it.
MIH Support
Provide a mechanism (for APs) to indicate Media Independent Handoff capability
Yao Zhonghui, Huawei

7. September, 2005
Network Selection
Should based on Interwoking Capability and external network information.
Network Selection policy is out of scope of u
Yao Zhonghui, Huawei

8. SSPN Interface From requirement September, 2005 SSPN Interface
Define the Authorization Information (originated from the SSPN ) that shall be provided to the MAC and associated functionality.
Define the Authorization Information (originated from the SSPN ) that shall be provided to the MAC and associated functionality honoring the information in the MAC.
Define functionality by which admission control and QoS mapping decisions made locally in the AN can be influenced by the contents of the Authorization Information.
Define functionality by which the Authorization Information described above can be modified by the SSPN.
Make accessible accounting information for transfer to the SSPN. This shall include information about accepted TSPECs, their duration, and about actual traffic flows.
Yao Zhonghui, Huawei

9. Network Sharing From requirements
September, 2005
Network Sharing
From requirements
Network Selection
to support authentication with multiple SSPNs through a single AP.
Tightly associated with SSPN interface
Yao Zhonghui, Huawei

10. STA Sharing From requirements Authentication September, 2005
A STA shall be able to authenticate with different SSPNs simultaneously, in order to gain simultaneous access to multiple Destination Networks
Yao Zhonghui, Huawei

11. Multi-Credentials From requirements Network Selection Authentication
September, 2005
Multi-Credentials
From requirements
Network Selection
a STA that has multiple credentials with an SSPN to select the correct credentials when authenticating with a Local Network.
Authentication
A STA shall be able to authenticate with different SSPNs simultaneously, in order to gain simultaneous access to multiple Destination Networks.
Yao Zhonghui, Huawei

12. Security Consideration
September, 2005
Security Consideration
Network sharing security consideration
STA sharing security consideration
STA MAC address protection
From requirements
Protection
Define functionality to prevent hijack of MAC addresses.
Provide functionality for MAC Address Anonymity
Yao Zhonghui, Huawei

13. Outline General Questions on Interworking 802.11u Architecture
September, 2005
Outline
General Questions on Interworking
802.11u Architecture
Network Selection
Visual STA
Yao Zhonghui, Huawei

14. September, 2005
Components
BSS1
STA 1
ESS
STA 2 AP DS AP
802.x LAN
Portal
STA3
STA 4
BSS2
defined an integration service that supports MSDU delivery between BSS and integrated LAN. And,
Portal is defined as the logical point at which the integration service is provided.
Yao Zhonghui, Huawei

15. 802.11u Components Proposal: A new ‘entrance’ entity Introduced
September, 2005
802.11u Components Proposal: A new ‘entrance’ entity Introduced
BSS1
External Network
STA 1
STA 2
Entrance DS AP AP
802.x LAN
Portal
STA3
STA 4
BSS2
We also define ‘entrance’ as the logical point at which the interworking service is provided.
An u network can interwork with different external networks by only one entrance or related different entrances.
Yao Zhonghui, Huawei

16. Overview Model of Interworking Network Entities
September, 2005
Overview Model of Interworking Network Entities AS
TOE
SSPN
AS/
proxy GW
TOE
SSPN
Entrance
Entrance DS AP AP AP AP
STA1
STA3
TOE
Yao Zhonghui, Huawei

17. Overview Model of Network Entities
September, 2005
Overview Model of Network Entities AS
TOE
SSPN
AS/
proxy GW
TOE
SSPN
Here’s u Concerns.
Entrance
Entrance DS AP AP AP AP
STA1
STA3
TOE
Yao Zhonghui, Huawei

18. Basic Interworking functions
September, 2005
Basic Interworking functions AS
TOE
SSPN
AS/
proxy GW
TOE
SSPN
External network information service
Entrance
Entrance DS
Bear service AP AP AP AP
External network Discovery and selection
STA1
STA3
TOE
Yao Zhonghui, Huawei

19. New Architectural Services for Interworking
September, 2005
New Architectural Services for Interworking
External Network Information Service
This is a DSS that an AP can access external network information for supporting STA network discovery/selection.
Bear Service
This is a DSS that an AP can request DS to maintain a bear for a specific flow according SSPN authorization information.
Yao Zhonghui, Huawei

20. Outline General Questions on Interworking 802.11u Architecture
September, 2005
Outline
General Questions on Interworking
802.11u Architecture
Network Selection
Visual STA
Yao Zhonghui, Huawei

21. Background 802.11 Network Selection based on SSID, and BSSDescription.
September, 2005
Background
Network Selection based on SSID, and BSSDescription.
BSSDescription includes network capability information of:
CapabilityInformation
BSSBasicRateSet
RSN
Etc
Yao Zhonghui, Huawei

22. September, 2005
802.11u Network Selection
802.11u Network Selection Should based on Interwoking Capability and related external network information.
Network Selection policy is out of scope of u
Yao Zhonghui, Huawei

23. Interworking Capability Information
September, 2005
Interworking Capability Information
Network Owner Identifier
Basic Interworking capability Information
Interworking Capability Bit
Support interworking or not
MIH Bit
MIH enabled or not
Urgent call Bit
Urgent call enabled or not ……
Online enrollment methods
e.g. UAM
Yao Zhonghui, Huawei

24. External Network Information
September, 2005
External Network Information
External Network Identifier
Interworking Type
Intranet
Internet
3GPP
3GPP scenarios 1 == Internet
3GPP scenarios 2
3GPP Scenarios 3 ……
3GPP2
UMA
Other related informations
E.g. MIH network information, charges information, Roaming related information, etc.
Yao Zhonghui, Huawei

25. External Network Information Service is a DSS
September, 2005
External Network Information Service is a DSS AP
(a1)
SAP
(a2) (b) DS
A、request-response mechanism
(a1) External-network-information.request
(a2) External-network-information.response
B、Indication mechanism
(b) External-network-information.indication
Yao Zhonghui, Huawei

26. Network Selection Routine
September, 2005
Network Selection Routine
STA AP DS
Begin to SCAN
Message 1: Interworking Capability Information
Message 2: Network Discovery Request
External Network Information Request
Message 3: Network Discovery Response
External Network Information Response
Join a selected BSS
Yao Zhonghui, Huawei

27. Outline General Questions on Interworking 802.11u Architecture
September, 2005
Outline
General Questions on Interworking
802.11u Architecture
Network Selection
Visual STA
Yao Zhonghui, Huawei

28. Requirements September, 2005 AS2 AS1 Entrance Entrance
External Network
External Network DS AP
TOE1
TOE2
STA
Yao Zhonghui, Huawei

29. Visual STA Approach September, 2005DS AP
One STA may simulate as more than one visual STAs (v-STAs).
Each v-STA has independent state machine.
V-STA1
V-STA2
STA2
BSS
STA1
Yao Zhonghui, Huawei

30. The Creation of Visual STA
September, 2005
The Creation of Visual STA
STA AP
Visual STA
Create
Temporary address allocation request（V-STA instance No.）
Temporary address allocation response (V-STA instance No, T-MAC-ADDR）
Temporary address allocation
Authenticate
Association request
Association Response
Yao Zhonghui, Huawei

31. Communication based on visual STA
September, 2005
Communication based on visual STA
AS#1
AS#2
Client#1
Client#2
TOE#1
TOE#2
STA AP
Visual STA mapping
Visual STA mapping
T-MAC#1
T-MAC#2
T-MAC#2
T-MAC#1
Yao Zhonghui, Huawei

32. MSDUs from STA to AP September, 2005 MAC (STA) MAC (AP)
MA-UNITDATA.request
Replace TA from real MAC address
To V-STA temporary address
MSDU transfer
MA-UNITDATA-STATUS.indication
Resume TA from V-STA temporary
Address to real MAC address
MA-UNITDATA.indication
Yao Zhonghui, Huawei

33. MSDUs from AP to STA September, 2005 MAC (AP) MAC (STA)
MA-UNITDATA.request
Replace RA from real MAC address
To V-STA temporary address
MSDU transfer
MA-UNITDATA-STATUS.indication
Resume RA from V-STA temporary
Address to real MAC address
MA-UNITDATA.indication
Yao Zhonghui, Huawei

34. References 11-05-0822-00-000u-tgu-requirements
September, 2005
References
u-tgu-requirements
u-suggested-tgu-functional-requirements
u-terms-and-definitions
u-draft-scope-scenarios-and-assumptions
Yao Zhonghui, Huawei