Method of processing non-real time service and broadcast receiver

A method of processing a Non-Real Time (NRT) service in a broadcast receiver, the method comprising:

• receiving a first signaling information table including first information of the NRT service and a second signaling information table including second information of the NRT service in a receiving unit;
• detecting a duplicate of the first information included in the first signaling information table and a duplicate of the second information included in the second signaling information table in a service manager;
• acquiring the first information after processing the first signaling information table if the first information included in the first signaling information table is not a duplicate and acquiring the second information after processing the second signaling information table if the second information included in the second signaling information table is not a duplicate in the service manager;
• and
• receiving and processing NRT service data based on at least the acquired first or second information in a processor,
• wherein the first information includes an Internet Protocol (IP) address and a User Datagram Protocol (UDP) port number of IP datagrams that form the NRT service,
• wherein the second information includes information describing at least one content item in the NRT service, and
• wherein IP datagrams including the first signaling information table and the second signaling information table have a well-known IP address and a well-known UDP port number.