Transmitter, receiver, and control method thereof regarding transmission packet header

Abstract

A transmitter includes a baseband frame generator configured to generate a baseband frame comprising a baseband header, a data field, and a padding field; and a mapper to map a plurality of data streams to the data field, wherein the baseband frame generator is further configured to insert a padding length field indicating a byte number of the padding field in the baseband frame, and insert a padding indicator field indicating information about the padding length field in the baseband header.

What is claimed is: 
     
         1 . A transmitting method of transmitter, the method comprising:
 generating a packet comprising a header and a payload; and   transmitting a signal which is generated based on the packet,   wherein the header comprises a first field,   wherein the first field comprises one of a first value, a second value and a third value,   wherein the first value indicates absence of a second field and a third field in the packet,   wherein the second value indicates presence of the second field of which a length is 1 byte,   wherein the third value indicates presence of the second field of which the length is 2 bytes,   wherein the second field comprises length information indicating a length of padding,   wherein if the length of padding is 1 byte and the first field comprises the second value, the second field is used as padding of 1 byte,   wherein if a number of bytes of the third field is zero, the first field comprises the first value,   wherein if the number of bytes of the third field is in a range of 1 to a threshold value, the first field comprises the second value, and   wherein if the number of bytes of the third field is greater than the threshold value, the first field comprises the third value.   
     
     
         2 . The method of  claim 1 , wherein the generating the packet further comprises adding an ISSY indicator field indicating whether the ISSY field is present in the header if an input system synchronizer (ISSY) field is added to the packet.