Method of designing a multiplexing structure for resource allocation to support legacy system

A method of communicating data between a mobile communication device and a base station, comprising:

• frequency demultiplexing a frequency multiplexed sub-frame to form a tile of a first communication mode and a tile of a second communication mode, wherein
• the tile of the first communication mode comprises X1 contiguous subcarriers and Y1 contiguous OFDMA symbols,
• the tile of the second communication mode comprises X2 contiguous subcarriers and Y2 contiguous OFDMA symbols, and
• X1=X2 and Y2 is a multiple of Y1.

A mobile communication device configured to wirelessly communicate with a base station, the mobile communication device comprising:

• a RF unit;
• and
• a processor operatively connected to the RF unit and configured to frequency multiplex a tile of a first communication mode with a tile of a second communication mode to create a frequency multiplexed sub-frame, wherein
• the tile of the first communication mode comprises X1 contiguous subcarriers and Y1 contiguous OFDMA symbols,
• the tile of the second communication mode comprises X2 contiguous subcarriers and Y2 contiguous OFDMA symbols, and
• X1=X2 and Y2 is a multiple of Y1.

A base station configured to wirelessly communicate with a mobile communication device, the base station comprising:

• a RF unit;
• and
• a processor operatively connected to the RF unit and configured to frequency demultiplex a frequency multiplexed sub-frame to form a tile of a first communication mode and a tile of a second communication mode, wherein
• the tile of the first communication mode comprises X1 contiguous subcarriers and Y1 contiguous OFDMA symbols,
• the tile of the second communication mode comprises X2 contiguous subcarriers and Y2 contiguous OFDMA symbols, and
• X1=X2 and Y2 is a multiple of Y1.