Systems and methods for establishing a Wi-Fi display (WFD) session
Systems, methods, apparatus, and techniques are provided for establishing an application layer communications session over a layer 2 (L2) communications connection. In particular, a discovery request frame is transmitted from a first device. A discovery response frame is received at the first device, where the discovery response frame is transmitted from a second device in response to having received the discovery request frame. An application layer communications session is established between the first device and the second device while maintaining an existing L2 communications connection between the first device and the second device.
1. A method for establishing an application layer communications session over a layer 2 (L2) communications connection, the method comprising:
establishing the L2 communications connection over a local network between a first device and a second device, wherein the L2 communications connection is established for a purpose not related to the application layer communications session;
transmitting, from the first device, a discovery request frame;
receiving, at the first device, a discovery response frame transmitted from the second device in response to having received the discovery request frame; and
establishing the application layer communications session between the first device and the second device while reusing the entire established L2 communications connection between the first device and the second device.
2. The method of claim 1 , wherein the L2 communications connection is a peer-to-peer (P2P) communications connection.
3. The method of claim 1 , wherein the L2 communications connection is a tunneled direct link setup (TDLS) communications connection.
4. The method of claim 1 , wherein the application layer communications session is a WFD communications session.
5. The method of claim 1 , wherein the discovery request frame is a WFD Discovery Request frame and the discovery response frame is a WFD Discovery Response frame.
6. The method of claim 5 , wherein the WFD Discovery Response frame comprises a WFD Information Element (IE), the WFD IE describing at least one capability of the second device.
7. The method of claim 1 , wherein the discovery request frame is a Service Discovery request frame and the discovery response frame is a Service Discovery response frame.
8. The method of claim 1 , wherein the first device and the second device are each Wi-Fi enabled and WFD enabled.
9. The method of claim 1 , wherein the first device acts as a Wi-Fi display source and the second device acts as a Wi-Fi display sink.
10. The method of claim 1 , wherein the first device acts as a group owner (GO) of the application layer communications session.
11. A device for establishing an application layer communications session over a layer 2 (L2) communications connection, the device comprising:
a processor configured to establish the L2 communications connection over a local network between the device and a client, wherein the L2 communications connection is established for a purpose not related to the application layer communications session;
transmission circuitry configured to transmit a discovery request frame; and
receiver circuitry configured to receive a discovery response frame transmitted from the client in response to the client having received the discovery request frame, wherein
the processor is further configured to establish the application layer communication session between the device and the client while reusing the established L2 communications connection between the device and the client.
12. The device of claim 11 , wherein the L2 communications connection is a peer-to-peer (P2P) communications connection.
13. The device of claim 11 , wherein the L2 communications connection is a tunneled direct link setup (TDLS) communications connection.
14. The device of claim 11 , wherein the application layer communications session is a WFD communications session.
15. The device of claim 11 , wherein the discovery request frame is a WFD Discovery Request frame and the discovery response frame is a WFD Discovery Response frame.
16. The device of claim 15 , wherein the WFD Discovery Response frame comprises a WFD Information Element (IE), the WFD IE describing at least one capability of the second device.
17. The device of claim 11 , wherein the discovery request frame is a Service Discovery request frame and the discovery response frame is a Service Discovery response frame.
18. The device of claim 11 , where the device and the client are each configured with Wi-Fi capability and WFD capability.
19. The device of claim 11 , wherein the device is configured to act as a Wi-Fi display source and the client is configured to act as a Wi-Fi display sink.
20. The device of claim 11 , wherein the device is configured to act as a group owner (GO) of the application layer communications session.