Communication apparatus and communication method

An integrated circuit for a communication apparatus, the integrated circuit comprising:

• at least one input which, in operation, receives an input;
• and
• control circuitry coupled to the at least one input, the control circuitry, in operation, controlling:
• receiving a frame including a Scrambler Initialization field and an Address field;
• calculating an address value by dividing a plurality of bits that form a MAC address of the communication apparatus into a plurality of words, scrambling each of the plurality of words by using a value of the Scrambler Initialization field in the received frame as a seed, applying Cyclic Redundancy Check (CRC) encoding to a consecutive concatenation of the plurality of scrambled words, and taking upper bits of a bit sequence generated by the CRC encoding;
• and
• transmitting a response frame in response to the calculated address value matching a value of the Address field.