Mobility concepts for IEEE 802.11 March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Mobility concepts for IEEE 802.11 Date: 2008-01-16 Authors: Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
Draft mobility concepts for IEEE 802.11 March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Abstract Draft mobility concepts for IEEE 802.11 Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Introduction Future requirement for an IEEE 802.11 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 802.11 to parallel functionality within IEEE 802.16e Extension of IEEE 802.11r Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
802.11 Architecture Overview: Figure 5-10 March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 802.11 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 802.11-2007 Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Mobility Manager This figure has been copied from the current IEEE 802.11u draft Work within IEEE 802.11u has shown that a mobility management entity is possibly required within the SME, to allow an interface to IEEE 802.21 to be correctly defined. Extending the functionality of this entity would allow true IEEE 802.11 mobility in a similar way to that of the IEEE 802.16e functionality. Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
Handoff in IEEE 802.11 Handoff occurs Assumption March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Handoff in IEEE 802.11 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
Existing Research on 802.11 Fast Handover March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Existing Research on 802.11 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
Neighbor Graphs-Pruning (Reducing Probe Delay) March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Neighbor Graphs-Pruning (Reducing Probe Delay) Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks
March 2008 doc.: IEEE 802.11-08/0360r0 March 2008 Work to be done Discuss this concept within IEEE 802.11 WNG SC for further comments and feedback. Effectively introduce IEEE 802.16e mobility type concepts into IEEE 802.11. Interesting to see how IEEE 802.21 would fit into this, as a mobile capable IEEE 802.11 "system", would no longer require IEEE 802.21 ;-) Perhaps this is all too scary ! Stephen McCann, Nokia Siemens Networks Stephen McCann, Nokia Siemens Networks