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Border Flag in IEEE802.11k Site Reporting

Proposal to add a border flag in site reports to identify BSSs close to exit points of ESS coverage, enabling efficient handoff to other networks.

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Border Flag in IEEE802.11k Site Reporting

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  1. Border Flag in IEEE802.11k Site Reporting Hasse Sinivaara, Simon Black Nokia hasse.sinivaara@nokia.com, simon@motix.demon.co.uk, Black/Sinivaara (Nokia)

  2. History & Related Material • Based on previous proposals • 11-03-338r0, STA Statistics & RRM Information Distribution • 11-03-0544r0, Revised BSS Neighbourhood Distribution • Full proposal and normative text in 11-03-944 Black/Sinivaara (Nokia)

  3. Purpose • The principle of the border bit is to identify in Site Reports the BSSs close to the ‘exit points’ of ESS coverage such that: • A strong hint for dual-mode WLAN-cellular terminals that a hand-off to a network beyond the WLAN may be required shortly • Preparatory activities may take place while the WLAN signal quality is acceptable • Unnecessary inter-network transitions which may involve significant signaling and higher probability of service disruption are avoided • Typically the border flag would be set by a system administrator and the normative text proposal assumes that control of this is made available via the TGk MIB. Black/Sinivaara (Nokia)

  4. Border Flag Clear B A C Access to Parking Front Door Border Flag Set Border Flag Example Black/Sinivaara (Nokia)

  5. Site Report Modification • Additional flag in BSS Match sub-field to signal ESS border 0 1 2 3 4 - 7 ESS Border ESS Match Capability Match Supported RateMatch Reserved Black/Sinivaara (Nokia)

  6. Dot11RRMRequestEntry ::= SEQUENCE { dot11RRMSiteReportIFIndex INTEGER, dot11RRMSiteReportBSSID MacAddress, dot11RRMSiteReportMatchStatus Unsigned32, dot11RRMSiteReportESSBorder TruthValue dot11RRMSiteReportESSMatch TruthValue dot11RRMSiteReportCapMatch TruthValue dot11RRMSiteReportSuppRatesMatch TruthValue dot11RRMSiteReportCurentChannel INTEGER, dot11RRMSiteReportPhyType INTEGER, dot11RRMSiteReportRowStatus RowStatus } MIB Addition • Based on 11-03-837r3, replace Match Status enumeration with boolean types Black/Sinivaara (Nokia)

  7. Motion To instruct the editor to add the contents of submission 11-03-0944r0 into the next version of the IEEE802.11k draft. Moved: Black Second: Y: N: A: Black/Sinivaara (Nokia)

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