Communication control method and transmitting apparatus

A communication control method of a transmission system that exchanges a transmission frame between a first transmitting apparatus and a second transmitting apparatus, the communication control method comprising:

• causing the first transmitting apparatus to receive a transmission frame, which is encapsulated using a first method or a second method different from the first method, from the second transmitting apparatus;
• causing the first transmitting apparatus to determine an encapsulation method of the transmission frame, based on information set according to the encapsulation method in the received transmission frame;
• causing the first transmitting apparatus to decapsulate the received transmission frame, based on the determination result;
• and
• causing the first transmitting apparatus to encapsulate another transmission frame using the determined encapsulation method and transmit another transmission frame,
• wherein another transmission frame is a transmission frame to be transmitted to the second transmitting apparatus, and
• wherein the encapsulation of the transmission frame to be transmitted to the second transmitting apparatus is performed after a passage of time according to the determined method from the determination.