Method and device for searching for supported service through WiFi direct network

摘要

The present invention relates to a method and device that may determine a service provided by a WiFi device to be connected before connecting a WiFi direct network. According to at least one embodiment of the present invention, if a service for an owner device of a wireless communication group is discovered for in the process of discovering for a service for the wireless communication group, there is the advantage that is possible to more conveniently perform the service discovery process by obtaining supported service information on each device belonging to the group. In addition, if there is a currently unavailable service in the process of discovering for the service for the wireless communication group, there is the advantage that it is possible to provide information highly necessary for a user to determine network establishment by further providing information on the unavailable service.

主权项

1. A method for performing group service discovery by a first device within a Wi-Fi Direct Network, the method comprising:
receiving a first frame from an Owner device, the first frame including a field indicating whether a wireless communication group including the Owner device supports a Group Service Discovery procedure, wherein the Group Service Discovery procedure corresponds to a service discovery procedure identifying all of services supported by each device belonging to the wireless communication group, and wherein each device belonging to the wireless communication group is connected to the Owner device through the Wi-Fi Direct Network via wireless connection; transmitting, a group Service discovery request frame to the Owner device supporting the Group Service Discovery procedure after receiving the first frame, wherein the group Service discovery request frame is a frame requesting information of protocols supported by each device belonging to the wireless communication group; and receiving a group Service discovery response frame periodically from the Owner device in response to the group Service discovery request frame, wherein the group Service discovery response frame includes first information indicating protocols supported by the wireless communication group and second information indicating whether or not a service status is changed.