Frame loss measurement method, system, and apparatus

A frame loss measurement system comprising:

• a transmission counter counting a number of data frames to be sent from a first node to a second node, at the first node,
• an OAM frame generator generating an OAM frame, which OAM frame includes information relating to the value of the transmission counter when transmitting an OAM frame transmitted previously, at the first node,
• an adder adding the generated OAM frame to the flow of data frames from the first node to the second node,
• a reception counter counting the number of data frames received by the second node among the data frames transmitted from the first node to the second node, at the second node, and
• a frame loss calculator calculating frame loss of a path from the first node to the second node by at least one of the first and second nodes based on information relating to the value of the transmission counter contained in said OAM frame and information relating to the value of said reception counter.

A frame loss measurement apparatus comprising:

• a transmission counter counting a number of data frames to be sent toward a specific node,
• an OAM frame generator generating a first OAM frame, which OAM frame includes information relating to the value of the transmission counter when transmitting an OAM frame transmitted previously,
• an adder adding the generated first OAM frame to the flow of data frames toward the specific node,
• a receiver receiving a second OAM frame including information relating to the value of a reception counter counting the number of data frames received by said specific node, among the data frames sent toward said specific node, at a second node and information relating to the value of said transmission counter, and
• a frame loss calculator calculating frame loss of a path to the specific node based on information relating to the value of the transmission counter and information relating to the value of said reception counter contained in said second OAM frame.