| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication system, optical network unit, and communication control method capable of reducing delay time until multicasting of a communication signal to the optical network unit becomes possible in the communication system in which the optical network unit can perform sleep operation. <P>SOLUTION: A communication system 301 comprises: a sleep control part 36 for controlling respective optical network units 202 so that an overlapping period, in which a part or all of respective wake-up periods of the respective optical network units 202 are overlapped, is provided; and a wake-up control part 36 for broadcasting a wake-up command so that the wake-up command reaches the respective optical network units 202 in the overlapping period when a communication signal to be multicast from an optical line terminal 101 to the optical network units 202 is generated. The optical line terminal 101 multicasts the communication signal to the optical network units 202 after the wake-up command is broadcast by the wake-up control part 36. <P>COPYRIGHT: (C)2013,JPO&INPIT |
