Data processing apparatus and data processing method

A reception apparatus, comprising:

• receive circuitry configured to receive a signal via broadcast, the signal conveying at least one physical layer frame including signaling and at least one subframe, the at least one subframe having as many as two subframe boundary symbols;
• and
• processing circuitry configured to process the received signal,
• wherein if at least one subframe boundary symbol is present in the at least one subframe:
• the at least one subframe boundary symbol includes a number of null cells and a number of active data cells arranged at frequencies between frequencies of the null cells, with at most half of the null cells being disposed at frequencies lower than those of the active data cells and a remainder of the null cells being disposed at frequencies higher than those of the active data cells, and
• the signaling includes a null cell number indicative of the number of null cells in the at least one subframe boundary symbol.

A method for a reception apparatus, comprising:

• receiving a signal via broadcast, the signal conveying at least one physical layer frame including signaling and at least one subframe, the at least one subframe having as many as two subframe boundary symbols;
• and
• processing the received signal,
• wherein if at least one subframe boundary symbol is present in the at least one subframe:
• the at least one subframe boundary symbol includes a number of null cells and a number of active data cells arranged at frequencies between frequencies of the null cells, with at most half of the null cells being disposed at frequencies lower than those of the active data cells and a remainder of the null cells being disposed at frequencies higher than those of the active data cells, and
• the signaling includes a null cell number indicative of the number of null cells in the at least one subframe boundary symbol.