Patent ID: 9270367
Filing Date: 2016-02-23
CPC Classification: H04B,H04J,H04L

Claim Text:
1. A method for automatically discovering a flexible rate Optical Data Unit (ODUflex) bandwidth hitless resizing capability, comprising: a source end interface of a link sending a link summary message to an opposite end interface of the link, wherein the link summary message carries information of whether the source end interface of the link supports the ODUflex bandwidth hitless resizing capability which is defined through a G.hao protocol; after receiving the link summary message, the opposite end interface of the link firstly determining whether a local interface mapping relationship or a remote end interface mapping relationship carried in the message is matched with an interface mapping relationship stored in the opposite end interface, if matched, feeding back a message to the source end interface of the link according to said information or according to said information and whether the opposite end interface of the link supports the ODUflex bandwidth hitless resizing capability, if the local interface mapping relationship or the remote end interface mapping relationship carried in the message is mismatched with the interface mapping relationship stored in the opposite end interface, the opposite end interface sending a link summary not-acknowledgment message to the source end interface of the link and indicating that the interface mapping relationships are mismatched; and the source end interface of the link determining whether the link supports the ODUflex bandwidth hitless resizing capability according to the message fed back by the opposite end interface of the link; wherein the link summary message carrying the information of whether the source end interface of the link supports the ODUflex bandwidth hitless resizing capability is implemented by a following way: a data link object of the link summary message including a subobject, and the subobject including a field which represents whether the source end interface supports the ODUflex bandwidth hitless resizing capability; wherein: the step of, after receiving the link summary message, the opposite end interface of the link feeding back the message to the source end interface of the link according to said information or according to said information and whether the opposite end interface of the link supports the ODUflex bandwidth hitless resizing capability comprises: after receiving the link summary message, the opposite end interface of the link reading the field in the subobject, making a judgment on the field, if judging that the field represents that the source end interface does not support the ODUflex bandwidth hitless resizing capability, feeding back a link summary not-acknowledgment message to the source end interface of the link; if judging that the field represents that the source end interface supports the ODUflex bandwidth hitless resizing capability, then judging whether the opposite end interface of the link supports the ODUflex bandwidth hitless resizing capability, if not supporting, feeding back the link summary not-acknowledgment message to the source end interface of the link, and if supporting, feeding back a link summary acknowledgment message to the source end interface of the link.