Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

A method of receiving a broadcast signal in a receiver, the method comprising:

• receiving the broadcast signal including link layer packets into which Internet Protocol (IP) packets are encapsulated, wherein each link layer packet includes a link layer packet header and a payload, wherein the link layer packet header includes an information field for identifying whether the payload carries a segmentation of an IP packet or carries a concatenation of an IP packet with another IP packet, and wherein headers of the IP packets are compressed based on Robust Header Compression (RoHC) of unidirectional mode;
• decapsulating the link layer packets into the IP packets based on the information field;
• and
• decompressing the headers of the IP packets.

A receiver for receiving a broadcast signal, the receiver comprising:

• an antenna to receive the broadcast signal including link layer packets into which Internet Protocol (IP) packets are encapsulated, wherein each link layer packet includes a link layer packet header and a payload, wherein the link layer packet header includes an information field for identifying whether the payload carries a segmentation of an IP packet or carries a concatenation of an IP packet with another IP packet, and wherein headers of the IP packets are compressed based on Robust Header Compression (RoHC) of unidirectional mode;
• and
• a processor to:
• decapsulate the link layer packets into the IP packets based on the information field, and
• decompress the headers of the IP packets.

A method of transmitting a broadcast signal in a transmitter, the method comprising:

• encapsulating Internet Protocol (IP) packets into link layer packets, wherein each link layer packet includes a link layer packet header and a payload, wherein the link layer packet header includes an information field for identifying whether the payload carries a segmentation of an IP packet or carries a concatenation of an IP packet with another IP packet, and wherein headers of the IP packets are compressed based on Robust Header Compression (RoHC) of unidirectional mode;
• generating the broadcast signal including the link layer packets;
• and
• transmitting the broadcast signal.

A transmitter for transmitting a broadcast signal, the transmitter comprising:

• a processor to:
• encapsulate Internet Protocol (IP) packets into link layer packets, wherein each link layer packet includes a link layer packet header and a payload, wherein the link layer packet header includes an information field for identifying whether the payload carries a segmentation of an IP packet or carries a concatenation of an IP packet with another IP packet, and wherein headers of the IP packets are compressed based on Robust Header Compression (RoHC) of unidirectional mode, and
• generate the broadcast signal including the link layer packets;
• and
• an antenna to transmit the broadcast signal.