Patent ID: 7650637

Claim:
A system for ensuring quality of service in a virtual private network, comprising: a logical bearer network, which is formed by connecting label switch paths configured with preserving bandwidth to routers over a basic IP network with multi-protocol label switch, and is dedicated to transmit service data with quality of service requirement; and a bearer control network to maintain the logical bearer network and determine whether both a service data receiving site and a service data sending site have a quality of service requirement, wherein, if both the service data receiving and sending sites have the quality of service requirement, the bearer control network allocates route for the service, marks priority of the service in the quality of service field of route label corresponding to multi-protocol label switch data packets encapsulated from the service data stream, and routes the service data to opposite end via the logical bearer network in accordance with the allocated route; wherein the bearer control network comprises: centralized resource controllers for: determining whether a connectivity between the receiving and sending sites is a connectivity with quality of service requirement by comparing route targets of the receiving and sending sites; determining the service between the sending sites and receiving sites has a quality of service requirement if the connectivity between the receiving and sending sites is a connectivity with quality of service requirement; otherwise determining the service between the receiving and sending sites has no quality of service requirement.