IGP Flex Algorithm Path Determination with Bandwidth Reservation
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Solution Overview
Problem
Current Interior Gateway Protocol (IGP) Flex Algorithm (FA) technologies do not support path selection based on bandwidth resource reservation, leading to inability to arrange paths for service traffic within the entire network slice, resulting in potential traffic congestions.
Innovation Solution
A path determination method that acquires link bandwidth data of all physical links within a network slice and the required bandwidth of a transmission channel, then determines a path for the transmission channel based on this data, enabling bandwidth resource reservation and avoiding traffic congestions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IGP FA technologies are used to support 5G network slices, then multiple network slices can have dedicated bearer subnetworks, but path selection based on bandwidth resource reservation is not supported leading to traffic congestions
Solution Approach 1:
The patent introduces bandwidth resource reservation as a new parameter for path selection in IGP FA algorithms. By incorporating bandwidth availability data into the path determination process, the system can select paths that satisfy both network slice isolation requirements and traffic efficiency needs, preventing congestion while maintaining slice dedication.
Solution Approach 2:
The patent performs preliminary bandwidth resource assessment and path calculation before actual traffic transmission. By pre-determining paths based on available bandwidth resources and reservation requirements, the system avoids congestion before it occurs, ensuring efficient traffic flow while maintaining network slice isolation.
2Ease of operation
If traditional IGP FA path calculation is used, then path determination is simple, but bandwidth resource reservation cannot be performed leading to potential traffic congestions
Solution Approach 1:
The patent introduces an intermediary bandwidth resource assessment mechanism that bridges traditional IGP path calculation and congestion avoidance. This intermediary layer collects bandwidth data, evaluates path availability, and provides informed path selection without significantly complicating the overall operation, thus maintaining simplicity while improving reliability.
3Reliability
If bandwidth resource reservation is implemented across the entire network slice, then traffic congestions can be avoided, but system complexity increases
Solution Approach 1:
The patent segments the bandwidth resource assessment and path determination process into distinct modules: bandwidth data collection, resource availability evaluation, and path calculation. This segmentation allows each component to handle specific tasks independently, reducing overall system complexity while achieving comprehensive bandwidth reservation across the network slice.
Solution Approach 2:
The patent implements bandwidth resource reservation selectively for paths that require it, rather than uniformly across all network operations. By applying bandwidth assessment and reservation only where necessary for congestion-prone traffic, the system achieves reliable congestion avoidance without unnecessarily increasing complexity throughout the entire system.
Data Source
AI summary
A path determination method, a network element, and a computer-readable storage medium are disclosed. The path determination method may include: acquiring link bandwidth data of all physical links within a network slice, where the link bandwidth data corresponds to the network slice, and the network slice is created by an interior gateway protocol flex algorithm (S100); acquiring a required bandwidth of a transmission channel within the network slice (S200); and determining, according to the link bandwidth data and the required bandwidth, a path for the transmission channel from among all the physical links (S300).