Patent ID: 7652987

Claim:
A method for guaranteeing reliability of end-to-end Quality of Service (QoS) in a network with an independent bearer control layer, comprising: detecting and determining whether there is a failure on a Label Switched Path (LSP); if there isn't, returning to the process of detecting; if there is a failure on the LSP, determining whether there is a backup LSP for the failed LSP; if there is a backup LSP, sending, by a resource control function (RCF) entity, being a bearer control layer entity, information of the backup LSP to an edge router or a transmit router located on a bearer layer, and switching, by the edge router or the transmit router, service streams and corresponding resources from the failed LSP to the backup LSP based on a certain policy; if there isn't a backup LSP, the RCF entity allocating a new LSP for the service streams born on the failed LSP according to network topologies, and switching the service streams from the failed LSP to the new LSP, and releasing path resources formerly occupied by the service streams.