Patent ID: 9270375
Filing Date: 2016-02-23
CPC Classification: H04B,H04J,H04L

Claim Text:
1. A lossless bandwidth adjustment method, comprising: receiving, by a downstream node of a bandwidth-variable optical channel data unit (ODU) flex path, a request message from an upstream node of the ODUflex path, wherein the request message carries a tunnel identifier (tunnel ID) of the ODUflex path and second bandwidth information after adjustment, the request message is used for requesting lossless adjustment of a bandwidth of the ODUflex path, and the request message is sent by a first node of the ODUflex path downstream along the ODUflex path, node by node to a last node; wherein the ODUflex path after bandwidth adjustment and the ODUflex path before bandwidth adjustment have different label switching path identifiers (LSP IDs) but have the same tunnel ID, which indicates the ODUflex path after bandwidth adjustment and the ODUflex path before bandwidth adjustment belong to the same session; searching, by the downstream node, according to the tunnel identifier to obtain first bandwidth information before the adjustment of the ODUflex path, comparing the first bandwidth information before the adjustment with the second bandwidth information after the adjustment, determining a quantity of tributary slots that need to be adjusted for a link between the downstream node and an adjacent upstream node, and selecting a tributary slot that needs to be adjusted; and indicating, by the downstream node and through a label, a tributary slot after the adjustment of the adjacent upstream node or the selected tributary slot that needs to be adjusted, and sending a tributary slot adjustment command to a data plane, so that the data plane performs tributary slot adjustment and ODUflex bit rate adjustment according to the tributary slot adjustment command.