Communication apparatus, communication method and integrated circuit

An integrated circuit used in a communication apparatus that communicates with another communication apparatus, comprising:

• a first communication unit configured to receive serial data from a first communication apparatus that is serially connected to the communication apparatus;
• a modulation unit configured to modulate the serial data received by the first communication unit into data other than the serial data to generate transmission data;
• a second communication unit configured to perform first unicast transmission which involves transmitting the transmission data by designating a second communication apparatus as a transmission destination and second unicast transmission which involves transmitting the transmission data by designating a third communication apparatus as a transmission destination;
• and
• a determination unit configured to determine at least one of availability of serial communication by the second communication apparatus and availability of serial communication by electrical device that is serially connected to the second communication apparatus.

A communication method in a communication apparatus that communicates with another communication apparatus, comprising:

• receiving serial data from a first communication apparatus that is serially connected to the communication apparatus;
• modulating the serial data into data other than the serial data to generate transmission data;
• performing first unicast transmission which involves transmitting the transmission data by designating a second communication apparatus as a transmission destination;
• performing second unicast transmission which involves transmitting the transmission data by designating a third communication apparatus as a transmission destination;
• and
• determining at least one of availability of serial communication by the second communication apparatus and availability of serial communication by electrical device that is serially connected to the second communication apparatus.