Radio frequency integrated circuit having a physical layer portion integrated therein

A radio frequency integrated circuit for transmitting and receiving data over a radio wave according to a radio frequency communication standard regulating a physical layer which controls transmission or reception of data, a data link layer including a media access control layer which analyzes data to be transmitted or data received and controlled by the physical layer to determine a transfer mode and which uses the transfer mode determined to process the data to be transmitted or data received to transfer the data processed to a next layer, and a network layer which manages a transfer of the data to be transmitted or data received and transferred from the data link layer,

• said radio frequency integrated circuit comprising:
• a radio frequency transmitter/receiver for receiving an incoming radio wave to output the received data, and for converting the data to be transmitted to an outgoing radio wave to transmit the outgoing radio wave;
• a demodulator for demodulating the received data into a symbol to output symbol data received;
• a physical layer portion;
• said physical layer portion comprising,
• a data transmission and reception control for converting, during reception, the symbol data received into byte data received, and outputting, during transmission, symbol data to be transmitted, and
• a transfer mode determination portion for determining, at a first time point at which first identification data in the received data necessary for determining a received data transfer mode are fixed, a data length of subsequent second identification data, and latching, at a second time point at which data corresponding to the data length determined of the second identification data are fixed, data necessary for determining the received data transfer mode to transfer the data to the media access control layer;
• and
• a modulator for modulating the symbol data to be transmitted into the data to be transmitted to output the data to be transmitted to the radio frequency transmitter/receiver.