Method for providing guaranteed quality of service in IP network and system thereof
First Claim
1. A method for providing guaranteed Quality of Services (QoS) in an IP network, comprising:
- configuring a service bearer logic network layer from a basic network layer for a service type for bearing traffic streams with guaranteed QoS requirements;
after receiving a service request with guaranteed QoS requirement from a subscriber, obtaining, by a service control layer, addresses of a source subscriber and a destination subscriber and QoS parameters of the service through analyzing the service request, and sending a route selection and resource application request to a bearer control layer;
allocating, by a bearer network resource manager in the bearer control layer, resources and route from the source subscriber to the destination subscriber which comprises multiple Label Switched Paths for the service in the service bearer logic network of this service type according to the addresses of the source subscriber and the destination subscriber, generating a multi-level label stack for the resources and route, and informing the multi-level label stack to the service bearer logic network; and
forwarding traffic streams in the service bearer logic network according to labels configured in the multi-level label stack generated by the bearer network resource manager in the bearer control layer.
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Abstract
The invention discloses a method for providing guaranteed Quality of Services (QoS) in an IP network. In the invention, separated with the function of route selection for IP packets in IP bearer network, the same function for services with guaranteed QoS requirements is accomplished by bearer network resource managers in bearer control layer. After completing the route selection according to network resource occupation condition, the bearer network resource managers control the edge routers so that the traffic streams can be forwarded according to the path designated by the resource manager in the bearer network with multi-level label stack technology. The invention also discloses a system for providing guaranteed QoS in an IP network. The method and system according to the invention have good expansibility and little impact to the prior network.
48 Citations
16 Claims
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1. A method for providing guaranteed Quality of Services (QoS) in an IP network, comprising:
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configuring a service bearer logic network layer from a basic network layer for a service type for bearing traffic streams with guaranteed QoS requirements; after receiving a service request with guaranteed QoS requirement from a subscriber, obtaining, by a service control layer, addresses of a source subscriber and a destination subscriber and QoS parameters of the service through analyzing the service request, and sending a route selection and resource application request to a bearer control layer; allocating, by a bearer network resource manager in the bearer control layer, resources and route from the source subscriber to the destination subscriber which comprises multiple Label Switched Paths for the service in the service bearer logic network of this service type according to the addresses of the source subscriber and the destination subscriber, generating a multi-level label stack for the resources and route, and informing the multi-level label stack to the service bearer logic network; and forwarding traffic streams in the service bearer logic network according to labels configured in the multi-level label stack generated by the bearer network resource manager in the bearer control layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for providing guaranteed Quality of Service (QoS) in an IP network, comprising:
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a basic network layer, comprising edge routers and core routers, for bearing various IP service packets; a service bearer logic layer, planned and configured from the basic network layer and divided into multiple network resource management areas, comprising edge nodes, tandem switching nodes and connections between any two nodes, for bearing traffic streams with guaranteed QoS requirements; a bearer control layer, comprising bearer network resource managers, for managing the resources of a network resource management area for the service bearer logic layer; and a service control layer, comprising multiple service control layer servers, for processing service requests; wherein the bearer network resource manager allocates resources and route comprising multiple Label Switched Paths in the service bearer logic layer for a service, generates a multi-level label stack for the resources and route, wherein the multi-level label stack comprises multiple labels each of the label stands for an LSP of the route, and informs the multi-level label stack to the service bearer logic layer; and the service bearer logic network forwards the traffic streams of the service along the LSPs represented by the labels configured in the multi-level label stack. - View Dependent Claims (16)
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Specification