METHOD OF DYNAMIC LOSSLESS ADJUSTING THE BANDWIDTH OF THE IN-LINE RESILIENT PACKET RING NETWORK

摘要

The present invention discloses a method for dynamically and hitlessly adjusting bandwidth of an embedded Resilient Packet Ring (RPR) ring network, with which dynamical and hitless bandwidth adjustment for an RPR ring network embedded in a Synchronous Digital Hierarchy (SDH)/Synchronous Optical Network (SONET) can be realized through adding a Link Capacity Adjustment Scheme (LCAS) system in the SDH/SONET processing layer. When it is required to increase ring network bandwidth, first bandwidth of the link section between sites on the SDH/SONET processing layer is increased; then the LCAS system in the SDH/SONET processing layer is started, and the actual bandwidth of the link on the SDH/SONET processing layer is increased hitlessly with the LCAS system; finally the bandwidth of the ring network on the RPR processing layer is increased. When it is required to decrease ring network bandwidth, first bandwidth of the ring network on the RPR processing layer is decreased; then the LCAS system in the SDH/SONET processing layer is started, and the actual bandwidth of the link on the SDH/SONET processing layer is decreased hitlessly with the LCAS system; finally bandwidth of the link section between sites on the SDH/SONET processing layer is decreased. With the method provided in this invention, dynamical and hitless bandwidth adjustment for an embedded RPR ring network in SDH/SONET can be realized.