Patent ID: 9172525
Filing Date: 2015-10-27
Classification: H04J,H04L

Abstract:
1. A method for calculating a path compensation time value in a first communication apparatus, wherein the first communication apparatus is connected to a second apparatus comprising a service board unit and a compensation unit through a first fiber and a second fiber, and the path compensation time value is used to compensate transmission delay asymmetry between transmission delay introduced by the first fiber and transmission delay introduced by the second fiber, the method comprising: receiving a first time stamp comprised in a first data packet that is sent by the service board unit through the first fiber, wherein the first time stamp indicates the transmitting time of the first data packet; receiving a second time stamp comprised in a second data packet that is sent by the compensation unit through the second fiber, wherein the second time stamp indicates the transmitting time of the second data packet; calculating a transmission delay introduced by the first fiber according to the first time stamp, calculating a transmission delay introduced by the second fiber according to the second time stamp, and calculating the path compensation time value, wherein the path compensation time value equals to a half of a difference between the transmission delay introduced by the first fiber and the transmission delay introduced by the second fiber.