1. Stephen McCann, Siemens Roke Manor
September 2004
IEEE Wireless Interworking with External Networks (WIEN) Study Group Closing Report
14 May 2004
Stephen McCann, Siemens Roke Manor
Eric Njedjou, France Telecom

2. September 2004
Extending MAC Management operation for external networks information advertisement to the AP using L 2.5
Eric Njedjou, France Telecom

3. September 2004
Handover control
L3MPs as Mobile IP provides fully "terminal oriented" mobility solution
Always possible to proprietarily change MIP to initiate terminal mobility by the Home Agent or an extension thereof in the network
Network controlled mobility in multi-acess environment could be desirable for multiple reasons
Intelligent management of overall radio resources for the integrated operator
Always ensure the best possible quality of data services across heterogeneous accesses
Eric Njedjou, France Telecom

4. September 2004
Handover control
Therefore modifications to Mobile IP to support network initiated heterogeneous handovers would be based on information available from the operation of the involved access technologies
Then sounds more appropriate to directly modify the access technologies for inter-access mobility
Rather than adding a level of complexity by embedding access technologies signalling into an L3MP
The layer 2.5 model is emerging to facilitate inter-access mobility and handovers operation
Eric Njedjou, France Telecom

5. Network extended L 2.5 model
September 2004
Network extended L 2.5 model
Partly needed as a consequence of the need to control mobility form the network side
Layer 2.5 should necessitates shorter modifications to access technologies protocols stacks at network side
The peer to peer protocol operation need not change
except that the layer 2.5 will have to be appended to existing stacks in SGSNs/APs in order to deal with attachment/mobility management in the presence of multiple access networks
Eric Njedjou, France Telecom

6. Network extended L 2.5 model
September 2004
Network extended L 2.5 model
coverage areas will be the center points for interaccess mobility management procedures
Eric Njedjou, France Telecom

7. Network extended L 2.5 model
September 2004
Network extended L 2.5 model
The Information Service would also store information (received via L2.5) from attachments of stations to external networks as GPRS/UMTS
Eric Njedjou, France Telecom

8. Exchanging L 2.5 information via LLC
September 2004
Exchanging L 2.5 information via LLC
An associated station communicates via the exchanges of MAC frames carried by LLC
New treatment at network side will consist in analyzing L 2.5 information received on top of LLC on another layer
In the case LLC is envisaged to carry layer 2.5 information, a new type of operation would have to be required
Eric Njedjou, France Telecom

9. Exchanging layer 2.5 signalling before LLC connection is up
September 2004
Exchanging layer 2.5 signalling before LLC connection is up
When a station is not associated, thereby having no link layer connection, it can not exchange L 2.5 signalling with the AP/network
The information on the station attachment to other access networks (obtainable via L 2.5) can not be available to the AP/network
Suggestion:extend MAC Management operation so as to report information on the attachment to other access networks upon requesting association
Eric Njedjou, France Telecom

10. Extending MAC Management frames
September 2004
Extending MAC Management frames
Description of sub-types
Association request
Association response
Reassociation request
Reassociation response
Probe request
Probe response
Beacon
Anouncement traffic indication message
Disassociation
Authentication
Eric Njedjou, France Telecom

11. Availabality of Other Access Networks frame (AOAN)
September 2004
Availabality of Other Access Networks frame (AOAN)
As a sub-type of the management frame
Using information received from L 2.5
Frame Control
Duration DA SA
BSSID
Sequence Control
New Frame body
FCS
Fig 4. Management frame extension for AOAN
Protocol version
Type=
Management
New Sub-type
Eric Njedjou, France Telecom

12. Frame Body field of the AOAN when access technology is GPRS/UMTS
September 2004
Frame Body field of the AOAN when access technology is GPRS/UMTS
RLC
MAC
GSM RF/L1
GPRS/UMTS
PHY
GMM/SM
LLC/RRC
802.11
Layer 2.5
Fig5. Use of L 2.5 to extend MAC Management
Order
Information 1
Access technology identity 2
GPRS Mobility Management state 3
PDP type 4
PDP state 5
QoS profile requested 6
QoS profile negotiated 7
PLMN
Fig4. AOAN Frame body subfield
Eric Njedjou, France Telecom

13. Alternative to defining a new frame for AOAN
September 2004
Alternative to defining a new frame for AOAN
Order
Information 1
Capability information 2
Listen interval 3
SSID 4
Supported rates 5
Access technology type=GPRS/UMTS 6
GPRS Mobility Management state 7
PDP type 8
PDP state 9
QoS profile requested 10
QoS profile negotiated 11
PLMN
Transport the Availability of Other Access Networks information with the association request frame
Fig6. Suggested new Association Request frame body
Eric Njedjou, France Telecom

14. association response status code
September 2004
Status code
Meaning
Sucessful
2-9
Reserved 10
Cannot support all requested capabilities in the capability information field 12
Association denied due to reason out of scope of this standard
13-16
Association denied because of authentication failure 17
Association denied because access point is unable to handle additional associated stations 18
Association denied due to requesting station not supporting all the data rates 19 20
Association denied because requesting station is already attached to another access network that provide better link characteristics than the access point can serve 21
Association denied because the requesting station is already attached to another access network and the services it is running/willin to run does not require better link QoS
Order
information 1
Capability information 2
Status code 3
Association ID (AID) 4
Supported rates
Fig7. Association Request Frame body
Eric Njedjou, France Telecom

15. Suggested new association procedures
September 2004
Suggested new association procedures
RLC
MAC
GSM RF/L1
GPRS/UMTS
PHY
GMM/SM
LLC/RRC
802.11
Layer 2.5
Access Point
AOAN
Association Request
Association Response
Multi access station
Eric Njedjou, France Telecom