Bearer Network Resource Manager for IP Routing Path Selection
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Solution Overview
Problem
Current methods for selecting real-time service data transmission paths in IP networks face challenges such as high routing load, low efficiency, unstable network reservations, and inflexible resource allocation, particularly due to complex topology management and lack of knowledge about LSP resource conditions across domains.
Innovation Solution
A method that establishes an independent bearer control layer with multiple bearer network resource managers to select and determine intra-domain and inter-domain route paths segment by segment, using forward constraint and backward routing, hop-by-hop routing, label switching, and static configuration to optimize end-to-end route selection and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an independent bearer control layer is introduced to manage route paths segment by segment, then routing success ratio and resource allocation reliability are improved, but device complexity and network structure complexity increase
Solution Approach 1:
The patent divides the network into multiple management domains, each managed by an independent bearer network resource manager. Route paths are selected segment by segment across domains rather than end-to-end, reducing the complexity burden on any single node while improving overall routing reliability through distributed decision-making.
Solution Approach 2:
The bearer control layer acts as an intermediary between the service control layer and bearer network. It introduces bearer network resource managers that mediate route path selection, resource allocation, and topology management, thereby improving routing success ratio while isolating the complexity within the bearer control layer rather than propagating it throughout the entire network.
2Adaptability or versatility
If dynamic route path selection is implemented across multiple domains, then routing flexibility and resource allocation efficiency are improved, but network stability and reservation stability deteriorate
Solution Approach 1:
The patent implements preliminary route path selection and resource reservation within each management domain before crossing domain boundaries. Bearer network resource managers pre-establish route segments and reserve resources locally, which maintains network stability within domains while allowing flexible end-to-end route composition across multiple domains.
Solution Approach 2:
Each bearer network resource manager independently manages route path selection and resource allocation within its own management domain with localized control policies. This local autonomy maintains stability within each domain while the collection of local decisions provides overall network flexibility for end-to-end routing.
3Measurement precision
If comprehensive LSP resource information is collected across all domains, then route path selection accuracy is improved, but information management complexity and routing load increase
Solution Approach 1:
Instead of collecting comprehensive LSP resource information across all domains centrally, the patent segments the information management task. Each bearer network resource manager maintains and manages LSP resource information only within its own management domain, reducing information management complexity at each node while enabling accurate local route path selection.
Solution Approach 2:
Each bearer network resource manager has localized knowledge of LSP resource conditions within its management domain and makes routing decisions based on this local information. This local quality approach improves route path selection accuracy within each domain without requiring complex centralized information management across the entire network.
4Productivity
If segment-by-segment route path determination is implemented, then routing efficiency and resource allocation flexibility are improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent segments the route path determination process into domain-local operations. Each bearer network resource manager independently determines route segments within its management domain using local LSP resource information, avoiding the need for complex end-to-end signaling. This segmentation improves routing efficiency by enabling parallel local decisions while reducing signaling overhead compared to centralized end-to-end route establishment.
Data Source
AI summary
The present invention discloses a method for selecting a real-time service data transmission path, comprising establishing an independent bearer control layer comprising more than one bearer network resource manager between a service control layer and a bearer network. The method further comprises: after a source bearer network resource manager which is connected to the service control layer receives a connection request for a real-time service, orderly selecting and determining, from the source bearer network resource manager towards a destination bearer network resource manager, an intra-domain route path for the real-time service in a management domain corresponding to each bearer network resource manager, and an inter-domain route path between adjacent management domains corresponding to adjacent bearer network resource managers. In addition, the present invention discloses six methods for selecting a real-time service data transmission path based on different strategies. The methods according to the present invention can increase success ratio of routing, and can obtain an optimal route in simple and flexible manners, thus can guarantee reasonable allocation of resources.