METHOD AND COMMUNICATION NODE FOR ADJUSTING BANDWIDTH

摘要

A bandwidth adjusting method and a communication node are provided. The bandwidth adjusting method includes: sending, by an upstream ingress unit of a local node, multi-channel parallel basic switch cells to all downstream branch egress units of the local node, where adjustment signaling is carried in the multi-channel parallel basic switch cells and is used for indicating addition or removal of a basic switch cell; sending normal signaling when determining that received adjustment response statuses returned by all the downstream branch egress units are reception acknowledgment; after receiving the normal signaling by the downstream branch egress unit, adding or removing the basic switch cell into or from next multi-channel parallel basic switch cells according to the adjustment signaling; and adjusting a time slot of a high order optical channel data unit sent by the downstream branch egress unit to a downstream node, and instructing the downstream node to adjust the time slot of the received high order optical channel data unit. Through the method and the communication node, lossless bandwidth adjustment in a point-to-multipoint OTN asymmetric bandwidth carrier system is implemented.