Using The Site Report to Target Potential Roam Candidates Month 2000 doc.: IEEE 802.11-00/xxx Month 2000 Using The Site Report to Target Potential Roam Candidates Martin Lefkowitz, Trapeze Networks, 5753 W. Las Positas Blvd, Pleasanton, CA. 94588 lefko@trapezenetworks.com John Doe, His Company John Doe, His Company
Beacon Compression and The Site Report Month 2000 doc.: IEEE 802.11-00/xxx Month 2000 Beacon Compression and The Site Report How can Beacon Compression Help Fast Roaming? If we now understand we are in an ESS, not just a BSS, we can use the neighborhood information contained in the site report to; Narrow the search for a potentially new BSS Use Ancillary information to obtain some of the dynamic information (i.e. signal Strength) John Doe, His Company John Doe, His Company
Beacon Components in Regards to Roaming Month 2000 Beacon Components in Regards to Roaming Components of a beacon that remain static SSID Supported Rates Beacon Interval Channel Capability Country (802.11d/h) Security (802.11i) Transmit Power (802.11h) Components of a Beacon that are dynamic RSSI Load (802.11e) Channel Switch(DFS/802.11h) Channel Quiet(802.11h) John Doe, His Company
Beacon Compression Basic Assumption Month 2000 Beacon Compression Basic Assumption If we see a packet with a source address of a targeted BSSID we know: The Information in the Site Report is valid for the BSSID. Signal Strength If Spectrum Management or Multi Domain Capabilities are present If the ESS bit is set in the Site Report then Spectrum management is the same as the current BSS. While it’s not OK to transmit until a Beacon, or possibly Domain Signal Packet has been received, the signal strength of the device with the targeted BSSID is still useful. A Channel switch will not occur until the TBTT of the Neighbor BSS. John Doe, His Company
Month 2000 Conclusion Using the BSSID and ESS bit in the Site Report in the ways described in this presentation allows a STA to passively and quickly determine important variables needed to make a roam decision. John Doe, His Company