A method for providing a broadcast service in a Primary Device (PD) is discussed. The method includes performing a discovery process with a Companion Device (CD) application resided in a CD. Further, performing the discovery process includes receiving an application information request from the CD application, and sending an application information response, and the application information response includes location information used for an endpoint of a websocket server resided in the PD. In addition, establishing a websocket connection between the CD application and the websocket server based on the location information; and communicating at least one message with the CD application via the websocket connection.