A method for processing a broadcast signal, the method includes receiving a broadcast signal via a broadcast stream, the broadcast signal including service components of a broadcast service, service signaling information for signaling the broadcast service and a service list table; parsing the broadcast signal and obtaining the service list table, the service list table including bootstrap information for indicating a Real time Object delivery over Unidirectional Transport (ROUTE) session which delivers the service signaling information; obtaining the service signaling information by using the bootstrap information, the service signaling information includes first and second metadata, wherein the first metadata is used to determine a transport mode of each of the service components, and wherein the second metadata provides session description information for accessing the service components from the broadcast stream; and obtaining the service components for the broadcast service, and providing the broadcast service by using the service signaling information.