doc.: IEEE Submission Nov 2013 Betty Zhao et. al., HuaweiSlide 1 Service Discovery with Association Date: Authors:

doc.: IEEE Submission Scenario Multiplayer game requires that all devices connect with each other by some means, e.g. ‐ Bluetooth ‐ Wi-Fi Direct ‐ AP – discuss in this contribution Advantages of STAs connecting via AP ‐ STAs which are hidden to each other in one BSS can use same service ‐ STAs in power save mode, e.g. listening to Beacon only, can be woken up by AP quickly for specific service. Slide 2Betty Zhao et. al., Huawei Nov 2013

doc.: IEEE Submission Issue Player A and player B are in airport, and they don’t know each other. Both have same multiplayer game on the smart phones. Both want to find a partner to start the game. Multiple APs are around, but A and B don’t know which one can provide them a partner. How can A and B find and connect to each other efficiently? Slide 3 Nov 2013 Betty Zhao et. al., Huawei

doc.: IEEE Submission Proposed Solution STA advertises its service (identified by Service ID) before association. ‐ By PAM: “announce service information” (doc. 1396r3), or ‐ By STP: “A STA may use STP to exchange service information as defined in Table from a peer STA.” (doc. 1384r0), or ‐ By Probe Request, or ‐ By TBD action frame When AP knows the services of two STAs match, AP assists them to connect to each other. ‐ AP needs to make sure that the service advertised previously by the STA is still available. ‐ If the service is still available, AP assists two STAs to connect to each other via AP. Slide 4 Nov 2013 Betty Zhao et. al., Huawei

doc.: IEEE Submission Option 1 Association procedure is initiated by AP instead of non-AP STA, using Reverse Association Request/Response (TBD action frame) ‐ AP includes Service ID in Reverse Association Request frame. ‐ If the service identified by Service ID is available in STA, it sends Reverse Association Response frame with status code = SUCCESS. ‐ Otherwise, STA sends Reverse Association Response frame with status code = SERVICE_NOT_AVAILABLE. Slide 5 Nov 2013 Betty Zhao et. al., Huawei Reverse Association Response (status code) Reverse Association Request (Service ID) STAAP

doc.: IEEE Submission Option 2 Association procedure is initiated by AP instead of non-AP STA, using Association Request/Response ‐ AP includes Service ID in Association Request frame. ‐ If the service identified by Service ID is available in STA, it sends Association Response frame with status code = SUCCESS. ‐ Otherwise, STA sends Association Response frame with status code = SERVICE_NOT_AVAILABLE. Slide 6 Betty Zhao et. al., Huawei Association Response (status code) Association Request (Service ID) STAAP Nov 2013

doc.: IEEE Submission Option 3 AP sends Association Invitation (TBD action frame) to STA to ask for STA to initiate association procedure ‐ AP includes Service ID in Association Invitation frame. ‐ If the service identified by Service ID is available in STA, it initiates normal association procedure subsequently. ‐ Otherwise, STA doesn’t initiate association. Slide 7 Betty Zhao et. al., Huawei Nov 2013 Association Response Association Request STA AP ACK Association Invitation (Service ID)

doc.: IEEE Submission Summary STAs with same service communicate through AP. Combining service discovery and association process makes service discovery more efficiently. Three options are provided for consideration. Slide 8 Nov 2013 Betty Zhao et. al., Huawei

doc.: IEEE Submission SP Do you support the concept that AP may initiate association with STA for specific service? ‐ Y/N/A Slide 9Betty Zhao et. al., Huawei Nov 2013