A method of generating and processing a broadcast signal, includes generating broadcast data for broadcast services; generating first signaling information providing information for discovery and acquisition of a broadcast service; generating second signaling information including service entries for the broadcast services, wherein one of the service entries includes a first service identifier for identifying the broadcast service and bootstrap information for discovering a transport session carrying the first signaling information for the broadcast service; generating physical layer signaling information; and transmitting the broadcast signal including the broadcast data, the first signaling information, the second signaling information, and the physical layer signaling information.