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IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN : 21-12-0109-00-0000

IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN : 21-12-0109-00-0000 Title: 8/29/2012 802.21c interim document discussion, IE requirements Date Submitted: Aug. 29, 2012 Authors or Source(s ): Charlie Perkins Abstract:

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IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN : 21-12-0109-00-0000

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  1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-12-0109-00-0000 Title: 8/29/2012 802.21c interim document discussion, IE requirements Date Submitted: Aug. 29, 2012 Authors or Source(s): Charlie Perkins Abstract: This document proposes new IEs to support SPoS key distribution for optimized handovers, and raises some issues for discussion during the Aug. 29, 2012 802.21(c) teleconference.

  2. Issues • Naming: Should “PoS” replace “MGW”? • Conformance to key hierarchy in 802.21a • New IE needed for key distribution formula • IE needed for MN to inform SPoS about desired RAT • Discussion around Figure N.6.1 and descriptions of steps 21-12-0109-00-0000

  3. Should “PoS” replace “MGW”? • Name “MGW” was originally chosen to indicate that the SRHO document was relevant to a particular class of PoS • But this is obvious and implicit within the 802.21c document, and would likely remain obvious even if 802.21c is folded into the main document • The change would have to be propagated into the figures also, making for a bit more time-consuming editing. • Even though a nontrivial change, I think it is worthwhile to avoid creating additional terminology. Too much terminology is already an impediment to clarity of the documents, and leads to inconsistencies. 21-12-0109-00-0000

  4. Conform to key 802.21a hierarchy Need to make sure that key derivation in section 11.6.1 conforms to this key hierarchy 21-12-0109-00-0000

  5. New IE needed for MIRK, etc • Here, define “MNID” to mean MNnetworkaccessid, and “TPoS_ID” to mean TPoS_Identifier. MIRK is Ktmgw • SPoS payload to TPoS must contain: • MNID, Nonce, [Ktmgw ⊕ PNGstmgw (MNID, Nonce)] • SPoS payload to MN must contain: • TPoS_ID, Nonce, [Ktmgw ⊕ PNGsmgw (TPoS_ID, Nonce)] • New IE needed to provide [Ktmgw ⊕ PNG (ID, Nonce)] • Also, MN needs IE to enable SPoS to identify the proper TPoS • Preferred RAT • SSID • BSID • … 21-12-0109-00-0000

  6. Figure N.6.1 discussion 21-12-0109-00-0000

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