January 2009 doc.: IEEE 802.11-09/0173r0

IEEE P802.11 Wireless LANs

Usa case for Date and Time zone configuration

Date: 2009-01-21

Author(s): Name Affiliation Address Phone email 313 Fairchild dr. Gabor Bajko Nokia Mountain View, CA, +1 858 717 6650 [email protected] 94043

Abstract This proposal provides text describing a possible use case, to be added to the informative annex of the TGu draft specification, to address comment #4850. This proposal is based on draft TGu version D4.02.

page 1 January 2009 doc.: IEEE 802.11-09/0173r0

Insert the following new bullet into section U.1:

U.1 Network Discovery and Selection

Interworking Service provides features to support the network discovery and selection process a non-AP STA uses to choose the network with which to associate. Generic Advertisement Service (GAS) provides a non-AP STA access to an information server (e.g. an IEEE 802.21 IS) which can provide a rich set of information to aid the network discovery and selection process. In addition, Interworking Service provides lightweight features which also facilitate this process. The following paragraphs describe several use cases illustrating how these features may be used to aid in network discovery and selection. The uses cases are:

•Airport: A business traveler needs to connect via an airport hotspot to their enterprise network to download email and information from the customer database.

•Shopping: A person living in Silicon Valley visits a shopping mall and wants to use their smartphone to discover items on sale.

•Sales meeting: A business woman visiting a customer accesses their guest network.

•Museum: A visitor to a museum uses his smartphone to obtain virtual docent service.

•Gadget: A traveller wants the gadgets to automatically update the date and time to the local one

Insert the following new sub-section into section U.1:

U.1.5 Device configuration

A traveller arrives to his new destination and switches on the gadgets with WLAN interface it intends to use (phone, multimedia device, digital camera, video camera, etc). The traveller wants the gadgets to show the local time and to record the actions performed using the local time. Therefore, the traveller enables the ‘automatic date and time update’ in the gadgets. The gadgets, when switched on, will perform the following steps to update their date, time and time zone to the valid one at that particular location:

 The gadget’s non-AP STA performs an active scan by transmitting a Probe Request frame containing the wildcard SSID.

 In response, it receives Probe Response frames from one or more APs indicating support for Interworking Service in the Extended capabilites element. page 2 January 2009 doc.: IEEE 802.11-09/0173r0

 The gadget’s non-AP STA uses the MLME-GAS.request primitive to invoke Native GAS to request the Capabilities List (see 7.3.3.1) from any of those APs.

 If the Capabilities List indicates support for AP Date, Time and Time Zone Information, the non- AP STA again invokes the MLME-GAS.request primitive to retrieve the valid date, time and time zone of the AP.

Note: the gadgets get the requested information without the need to associate to any of the networks.

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