Patent ID: 7414967

Claim:
A method of route distribution for implementing multi-service optimization in a Synchronous Digital Hierarchy (SDH) transmit network, comprising: A. dividing the SDH transmit network into subnets in terms of rings to form a plurality of ring subnets, calculating initial routes for all services demand in the SDH transmit network; B. judging whether resource of links between two ring subnets is overloaded, if there exists a link with resource overloaded, recalculating the routes in terms of all services passing through the link; otherwise, entering step C; C. judging whether resource of links within each ring subnet is overloaded, if there exists a link with resource overloaded, adjusting the routes of services within the ring subnet, returning to step B, otherwise, entering step D; D. judging whether load of each ring subnet meets a load balance index of the ring subnet, respectively, if there exists a ring subnet whose load does not meet the load balance index, adjusting the routes of services within the ring subnet, returning to step C, otherwise, entering step E; E. dividing the ring subnets in the SDH transmit network into edge subnets and core subnets, judging whether an aggregative indicator of each link in the core subnets satisfies a preset convergence condition of the subnet, if yes, ending; otherwise, checking if times of routes calculation performed in step B reaches a preset threshold, if yes, ending, otherwise, recalculating the routes of all services passing through said each link.