Method For Allocating Bearer Network Resource

A method for allocating bearer network resources, implemented in at least one bearer network resource manager, each of which corresponds to a domain, the method comprising:

• upon receiving a QoS resource request, each bearer network resource manager deciding whether the destination user of the QoS resource request is an intra-domain user, if the destination user is the intra-domain user, selecting an intra-domain LSP of at least one hop, allocating resources on the selected intra-domain LSP, and terminating the current procedure, wherein, if the bearer network resource manager is the source bearer network resource manager, the intra-domain LSP is selected according to service information contained in the QoS resource request, and if the bearer network resource manager is not the source bearer network resource manager, the intra-domain LSP is selected according to the service information and information of inter-domain LSP contained in the QoS resource request;
• and if the destination user is not the intra-domain user, performing the following process:
• selecting an inter-domain LSP between the bearer network resource manager and the adjacent downstream bearer network resource manager thereof according to a pre-configured inter-domain routing policy and the service information contained in the QoS resource request, and allocating resources on the selected inter-domain LSP;
• selecting an intra-domain LSP of at least one hop, and allocating resources on the selected intra-domain LSP, wherein if the bearer network resource manager is the source bearer network resource manager, the intra-domain LSP is selected according to the service information contained in the QoS resource request and information of the selected inter-domain LSP, and if the bearer network resource manager is not the source bearer network resource manager, the intra-domain LSP is selected according to the information of inter-domain LSP contained in the QoS resource request and the information of the selected inter-domain LSP;
• and
• sending the QoS resource request containing the information of the selected inter-domain LSP to the downstream bearer network resource manager, to which the egress router of the selected inter-domain LSP belongs.