Patent ID: 7190698

Claim:
Method in a packet based communication network including network domains, wherein at least one domain is a Multiprotocol Label Switching MPLS domain, to establish a virtual leased line, VLL, between a source (SRC) and a destination (DST) in different domains in order to achieve packet transfer between the source (SRC) and the destination (DST), wherein the bandwidth broker (BB) is associated to each network domain and the bandwidth broker (BB) is configured to control a hierarchical routing domain, the method comprises the following steps: i) generate a request from en equity for a Virtual Leased Line, VLL, having a predefined Quality of Service, QoS, from a source network (SRC) to a destination network (DST) and apply the request to a Bandwidth Broker (BB) of a domain A, BB A , associated to the source network; ii) BB A establishes the different domains involved to reach the destination network (DST); iii) BB A directly or indirectly passes requests to all Bandwidth Brokers (BB) of the involved domains regarding a VLL of the predefined QoS from ingress to egress of each domain; iv) each involved bandwidth broker (BB) performs admission control in its domain; v) each involved bandwidth broker (BB) returns a result of the admission control to BB A that passes it back to the requesting entity and if the request was admitted along all domains between the source (SRC) and the destination (DST) a VLL of the predefined QoS is granted, characterized in that step iv) comprises the following step: performing [LSP] Label Switched Path, LSP. setup and passing resource requests from the Bandwidth Broker (BB) to at least one intra-domain ( 1 DB), wherein each intra-domain broker ( 1 DB) is responsible for admission control and the Label Switched Path, LSP, setup.