Transmission apparatus, cell multiplexing method thereof, reception apparatus, and cell de-multiplexing method thereof

A method for multiplexing of cells of a plurality of physical layer pipes (PLPs), the method comprising:

• for each PLP, based on a number of cells of the PLP to be transmitted in one subframe and a number of predetermined subslices, calculating a size of the subslice;
• comparing a value calculated based on the size of the subslices and the number of the subslices with a number of the cells of the PLP to determine whether to insert a dummy cell;
• and
• mapping a cell of the PLP included in the subslice to a subframe,
• wherein at least one of the subslices comprises the dummy cell depending on whether the dummy cell is inserted.

A reception apparatus for demultiplexing cells of a plurality of PLPs, the apparatus comprising:

• a reception unit for receiving a subframe from a transmission apparatus;
• and
• a frame de-builder configured to:
• for each PLP, based on a number of cells of the PLP to be transmitted through one subframe and a number of a predetermined subslices, calculate a size of the subslice, compare a value calculated based on the size of the subslices and the number of subslices with a number of the cells of the PLP to determine whether a dummy cell is inserted in the subframe, and based on the dummy cell being inserted, de-map the cells of the PLP from the subframe excluding the dummy cells.