Patent ID: 7764631

Claim:
A method for adjusting bandwidth of an embedded Resilient Packet Ring (RPR) ring network dynamically and losslessly, the embedded RPR ring network being in a Synchronous Digital Hierarchy/Synchronous Optical Network (SDH/SONET) comprising an SDH/SONET processing layer and an RPR processing layer, the method comprising: (A1) allocating, by a network manager, a demanded bandwidth as bandwidth of a link between sites to be increased in the RPR ring network on the SDH/SONET processing layer; (B1) starting, by any of the sites of the embedded RPR ring network and in an automatic manner, a Link Capacity Adjustment Scheme (LCAS) system in the SDH/SONET processing layer after the demanded bandwidth is allocated to the SDH/SONET processing layer, and losslessly increasing, by the LCAS, an actual bandwidth of the link, in which the actual bandwidth is required to be increased to the demanded bandwidth; and (C1) after the LCAS system increases the actual bandwidth of the link of the ring network on the SDH/SONET processing layer to the demanded bandwidth, the network manager configuring the demanded bandwidth as bandwidth of the RPR ring network on the RPR processing layer.