1. Mobility concepts for IEEE 802.11
March 2008
doc.: IEEE /0360r0
March 2008
Mobility concepts for IEEE
Date:
Authors:
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

2. Draft mobility concepts for IEEE 802.11
March 2008
doc.: IEEE /0360r0
March 2008
Abstract
Draft mobility concepts for IEEE
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

3. March 2008
doc.: IEEE /0360r0
March 2008
Introduction
Future requirement for an IEEE system is to allow mobility within an extended access network
Typically found over a large metropolitan/country area.
Method of allowing mobility across ESS domains
Evolution of IEEE to parallel functionality within IEEE e
Extension of IEEE r
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

4. 802.11 Architecture Overview: Figure 5-10
March 2008
doc.: IEEE /0360r0
March 2008
Architecture Overview: Figure 5-10
MIH
Other higher layers using
MAC state information
MAC_STATE_GENERIC_CONVERGENCE_SAP
MAC State Generic
Convergence Function
802.1X
MAC_SAP
MSCF-SME_SAP
MAC
MLME
SME
Mobility
Management
MLME_SAP
PHY_SAP
MLME_PLME_SAP
Interworking
Service
Management
PLCP sublayer
PLME
PMD_SAP
PLME_SAP
PMD sublayer
RSNA Key
Management
Note: The base standard version of this diagram is Figure 5-10 on page 42 of
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

5. March 2008
doc.: IEEE /0360r0
March 2008
Mobility Manager
This figure has been copied from the current IEEE u draft
Work within IEEE u has shown that a mobility management entity is possibly required within the SME, to allow an interface to IEEE to be correctly defined.
Extending the functionality of this entity would allow true IEEE mobility in a similar way to that of the IEEE e functionality.
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

6. Handoff in IEEE 802.11 Handoff occurs Assumption
March 2008
doc.: IEEE /0360r0
March 2008
Handoff in IEEE
Handoff occurs
with physical movement
with changeable environment
Assumption
Every AP has identical security policy and common capabilities.
Handoffs within the same ESS
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

7. Existing Research on 802.11 Fast Handover
March 2008
doc.: IEEE /0360r0
March 2008
Existing Research on Fast Handover
Reducing Probe Delay:
SyncScan [2], Multiscan [3], NG-Pruning [4], Channel Mask [1]
Reducing Authentication/Re-association delay
PNC [6], SNC [7], FHR [5]
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

8. Neighbor Graphs-Pruning (Reducing Probe Delay)
March 2008
doc.: IEEE /0360r0
March 2008
Neighbor Graphs-Pruning (Reducing Probe Delay)
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks

9. March 2008
doc.: IEEE /0360r0
March 2008
Work to be done
Discuss this concept within IEEE WNG SC for further comments and feedback.
Effectively introduce IEEE e mobility type concepts into IEEE
Interesting to see how IEEE would fit into this, as a mobile capable IEEE "system", would no longer require IEEE ;-)
Perhaps this is all too scary !
Stephen McCann, Nokia Siemens Networks
Stephen McCann, Nokia Siemens Networks