Format for Device Location Information in .11af Month Year doc.: IEEE 802.11-yy/xxxxr0 Format for Device Location Information in .11af Date: Oct 24, 2011 Authors: Name Company Address Phone email Padam Kafle Nokia 6021 Connection Drive, Irving, TX, 75039 +1 214 673 6232 Padam.kafle@nokia.com Gabor Bajko +1 858 717 6650 Gabor.bajko@nokia.com John Doe, Some Company

doc.: IEEE 802.15-<doc#> <month year> Introduction The DSE Registered Location element and Device position Information element used for representing the Device Location Information TLV field in current .11af specification is based on RFC 3825, which which has already been obsoleted by a new RFC 6225. The LCI encoding has been revised by RFC 6225 (see http://tools.ietf.org/html/rfc6225 ). The main change is the use of LatUnc, LongUnc and AltUnc for uncertainty instead of using resolution fields for latitude, longitude and altitude values. The use of an encoding format in .11af which can correctly express an arbitrary location of a STA and can be mathematically converted into other industry-wide used formats, like XML, used by e.g. the device to database interface protocols, is critical > Page 2

doc.: IEEE 802.15-<doc#> <month year> Proposed Changes Proposed Device Location Information element body fields based on the RFC 6225 (Doc: 11-11- 1402r0) > Page 3

doc.: IEEE 802.15-<doc#> <month year> Summary The proposed device location information element and other related changes in Doc: 11-11-1402r0 uses fields from the LCI format from RFC 6225 instead of format from obsoleted RFC 3825 The use of correct LCI format is important for .11af in order to enable easier mapping to any other location format, e.g. XML. > Page 4