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TGaq Design Options

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  1. TGaq Design Options Authors: Date: 2013-01-14 Stephen McCann, RIM

  2. Abstract Thoughts about Design Options for the TGaq meeting in January 2013, Vancouver, British Colombia, Canada Stephen McCann, RIM

  3. Need for Project (From PAR) • This amendment will provide mechanisms that assist in pre-association discovery of services by addressing the means to advertise their existence and enable delivery of information that describes them. This information about services is to be made available prior to association by stations operating on IEEE 802.11 wireless networks. • There are existing higher layer service discovery/description approaches (e.g. UPnP, Bonjour) as well as mechanisms to deliver information in pre-association states (e.g. just as ANQP can be delivered over GAS). Stephen McCann, RIM

  4. Way Forward • What do we want to do? • Use Case/Requirements analysis • Call for proposed solutions (complete/partial) • Down selection criteria (if multiple proposals) • Simple Protocol (quick) • Communication plan with other Fora (e.g. Wi-Fi Alliance?) Stephen McCann, RIM

  5. Quick Option • TGaq develops simple MAC protocol • Meets low level requirements of use cases • Other Fora deal with higher layers (L2+) • Liaison to other fora of our use cases Stephen McCann, RIM

  6. What’s wrong with GAS ? • Initial look at GAS • What are the gaps for TGaq • Can it be re-used • What is best for industry • Go back and look at probe request/public action frames • Can we develop something else that looks like GAS ? Stephen McCann, RIM

  7. What’s wrong with ANQP ? • If GAS is ok, then • Initial look at ANQP • What are the gaps for TGaq • Can it be re-used • What is best for industry • Go back and look at probe request/public action frames • Can we develop something else that looks like ANQP (re: RLQP in TGaf)? Stephen McCann, RIM

  8. IEEE 802.11u: Signaling Interworked Servers 802.11u Roaming and Network Info AP 802.11aq STA Services GAS SSPN Interface Emergency Network Alerts Connection W/O Association 802.11af TV White Spaces Location M I B Advertisement s Protocol #0 ANQP #1,2 MIH #3 EAS #4 RLQP #5 Service Beacon Probe Probe response

  9. What’s wrong with ANQP • Make GAS truly bi-directional • Need something more than an advertisement protocol. • Do we need request/response mechanism? • Transaction Protocol? • Broadcast GAS responses • New “ANQP” protocol to carry UPnP, Bonjour frames • Do we have to determine which frames would be required? Stephen McCann, RIM

  10. Protocol Ideas • Some simple new service discovery messages • Upper layer encapsulation • Return Codes • Signed (secure) messages? Stephen McCann, RIM