Method and device for communicating between devices in multimedia system

A method of a first device for use of at least one of a broadcast service or content in a multimedia system, the method comprising:

• transmitting, by an application of the first device, a request for discovery of a second device, the first device being a companion device for communicating with the second device, the second device being a primary receiver for receiving the at least one of the broadcast service or content over a network;
• obtaining, by the application of the first device, second service endpoint information of a websocket server of the second device from a companion screen (CS) manager of the second device, wherein first service endpoint information of a web server of the second device is used to obtain the second service endpoint information of the websocket server of the second device;
• identifying, by the application of the first device, a type of first information to be requested;
• in case that the type of the first information is a media playback related information type, transmitting, by the application of the first device, a request message for requesting media playback related information to the second device, using the second service endpoint information of the websocket server;
• and
• receiving, by the application of the first device, a response message including the media playback related information via a websocket connection established using the second service endpoint information from the second device, and
• wherein the media playback related information includes at least one of playback state information indicating a state of a current media playback or playback speed information indicating a speed of the current media playback.