1. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 1 TGaq Mini Tutorial Date: 2013-11-13 Authors:

2. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 2 Abstract TGaq Mini-Tutorial Summary of Study Group and Task Group work to date.

3. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 3 Rationale Existing pre-association GAS provides little detail about network services. Current mechanisms sequentially associate to available networks for discovery purposes. These are time consuming and potentially inefficient. Existing peer to peer discovery mechanisms flood the channel with pre-association traffic. Need to reduce power consumption through the use of efficient signalling.

4. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 4 Study Group Phase Started November 2012 Service Discovery concept appeared in Fall 2012 Device discovery well established GAS – Generic Advertisement Service –ANQP – Access Network Query Protocol (11u) –RLQP – Registered Location Query Protocol (11af) Considered mechanisms to discover available services provided by infrastructure. –IMS – IP Multimedia Subsystem –Printers

5. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 5 There is interest in service discovery in the industry IEEE 802.11 –Created new TGaq based on PAR: –11-12-1081-06-0pad-draft-par-proposal.doc11-12-1081-06-0pad-draft-par-proposal.doc WFA –Sent Liaison to WFA (Nov 2012) and requested feedback. –11-12-1389-00-0000-liaison-to-wfa-802-11aq-par.doc11-12-1389-00-0000-liaison-to-wfa-802-11aq-par.doc –No comments were returned. IETF –RFC 6763 – DNS Service Discovery Wireless Broadband Alliance –Next Generation Hotspots, for network discovery and selection

6. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 6 TGaq Scope This amendment defines modifications to the IEEE 802.11 standard, above the physical layer (PHY), to enable delivery of pre-association Service Discovery information by IEEE 802.11 stations (STAs).

7. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 7 Progress to date Use cases collected (22) –Use case analysis complete –11-13-0118-00-00aq-summary-of-pad-sg-use-cases.ppt11-13-0118-00-00aq-summary-of-pad-sg-use-cases.ppt Use case analysis document –Main features of use cases at MAC layer –11-13-0125-06-00aq-use-case-analysis.docx11-13-0125-06-00aq-use-case-analysis.docx Terminology document –Re-using IEEE definitions where available –11-13-0299-03-00aq-draft-tgaq-terminology.docx11-13-0299-03-00aq-draft-tgaq-terminology.docx Specification Framework Document –In progress at an early stage –11-13-0300-01-00aq-proposed-specification-framework-for- tgaq.docx11-13-0300-01-00aq-proposed-specification-framework-for- tgaq.docx

8. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 8 Example Use Case You enter IEEE meeting hotel and want to find a printer You notice that there are many WLANs in the hotel –Networks with printers: Hyatt: The hotel printer (free for hotel guest and 24/7 availability) Verilan: The printer in IEEE staff office (located in a secured environment, available 9am-5pm to non-IEEE-staff) FedEx/Kinko’s Office WLAN with one printer associated with (not free, office hours only; but has richer features) –and many other networks (e.g. AT&T) without printers. association may require payment, only to discover that printer service is inappropriate Problem is to determine which network to use prior to selection: –It is 1pm. You are sensitive to the security. –It is 9pm. You want high-quality print-out and cost is not an issue. –It is 11pm. You are sensitive to costs.

9. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 9 Initial Proposals Pre-association messages (PAD) –Likely to be based on GAS Container MAC protocol to carry upper layer service discovery protocols (e.g. UPnP, Bonjour) Provisioning and configuration of services in AP –Proxy service server connected to AP Universal identification of services –Use a hashing algorithm –UUID, a reverse domain notation, a registry of service IDs. Broadcast Concept –Advertisement of service information through broadcast frames.

10. doc.: IEEE 802.11-13/1313r4 Submission Proposed Architecture for 802.11aq Extend 802.11u to support service discovery or Define a new Service Discovery Protocol? Slide 10 STAAPService GAS ANQP… 802.11 ScopeNot in Scope of 802.11 Extend ANQP or define new service query protocol Service query protocol Up-layer service discovery protocol Probe November 2013 Stephen McCann, Blackberry

11. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 11

12. doc.: IEEE 802.11-13/1313r4 Submission STA AP Beacon Probe response Slide 12 STA S1: AP/Network Discovery + Service Indication Services from Network S2: Detailed Service Query Based on Service Indication GAS Recapture: Two step service discovery Services from associated device Service Record Service Indication Service Indication, e.g. Service Bitmap November 2013 Stephen McCann, Blackberry

13. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 13 Other Concepts Peer Service Discovery (PSDisc) design framework –Independent mode discovery (few STAs) –Server mode discovery (many STAs) Provisioning of Services by Associated STAs –Registration with an AP or Proxy Server SoftAP operation –Indicate provision of Internet connectivity –Indicate upper layer support –Lightweight and energy efficient method is desirable Pre-association discovery for neighboring APs –Do PAD when the STA is still in association

14. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 14 Construction of Draft Build on Specification Framework Document Normative text submissions considered this week

15. doc.: IEEE 802.11-13/1313r4 Submission November 2013 Stephen McCann, BlackberrySlide 15 Timeline – November 2013 Approval of PAR & 5C: November 2012 Initial TG meeting: January 2013 Initial Working Group Letter Ballot: July 2014 Re-circulation Working Group Letter Ballot: November 2014 Form Sponsor Ballot Pool: May 2015 Mandatory Editorial Check: November 2015 Initial Sponsor Ballot: November 2015 Sponsor Ballot Recirculation: January 2016 Final WG/EC Approval: May 2016 RevCom/Standards Board Approval: May 2016

16. doc.: IEEE 802.11-13/1313r4 Submission 802.11u: Advertisement Protocols STA AP Beacon Probe response GAS Registered Location Information Access Network Information ANQP RLQP Service Information PADP

17. doc.: IEEE 802.11-13/1313r4 Submission 802.11aq: Architecture STA AP Beacon Probe response STA S1: AP/Network Discovery + Service Indication Service Information S2: Detailed Service Query Based on Service Indication GAS Services from associated device Service Record Service Indication, e.g. Service Bitmap

18. doc.: IEEE 802.11-13/1313r4 Submission Upper Layer Protocols List of available ULPs-0 DNS Service Discovery, part of Apple’s Bonjour technology DNS-SD, Bonjour1 Service Location ProtocolSLP2 Simple Service Discovery Protocol as used in Universal Plug and Play SSDP, UPnP3 Universal Description Discovery and Integration for web services UDDI4