Lossless adjustment method of ODUflex channel bandwidth and ODUflex channel

摘要

The embodiments of the present application relate to the field of communications technologies, and disclose a method for adjusting bandwidth of a flexible Optical channel Data Unit (ODUflex) channel. The method includes: respectively adjusting, according to a bandwidth adjustment indication message, a quantity of time slots occupied by an ODUflex frame in a higher order optical channel data unit (HO ODU) at an egress side of each network node on an ODUflex channel; and adjusting, according to a rate adjustment indication message, a transmission rate of the ODUflex frame of each network node on the ODUflex channel, so as to unify the transmission rate of each network node on the ODUflex channel.

主权项

1. A method for adjusting a bandwidth of a flexible Optical channel Data Unit (ODUflex) channel configured in an optical transport network (OTN), wherein the ODUflex channel passes through a source network node, at least one intermediate network node and a destination network node, the method comprising:
adjusting a quantity of time slots occupied by an ODUflex frame in a Higher Order Optical Channel Data Unit (HO ODU) at each network node on the ODUflex channel; and adjusting a transmission rate of the ODUflex frame at the each network node on the ODUflex channel, so that the transmission rate of the frame is unified across the network nodes on the ODUflex channel; wherein adjusting the quantity of time slots occupied by the ODUflex frame at each network node on the ODUflex channel comprises: creating, by the source network node, a bandwidth adjustment indication message, and transmitting, by the source network node, the bandwidth adjustment indication message to an intermediate network node; adjusting, by the source network node, the quantity of time slots occupied by the ODUflex frame; after the source network node completes the adjustment, transmitting, by the source network node, a first bandwidth adjustment complete message to the intermediate network node; transmitting, by the intermediate network node, the bandwidth adjustment indication message to another intermediate network node or the destination network node; adjusting, by the intermediate network node, the quantity of time slots occupied by the ODUflex frame according to the bandwidth adjustment indication message; and transmitting, by the intermediate network node, the first bandwidth adjustment complete message to the other intermediate network node or the destination network node.