Forwarding Device Maintains AP Table Consistency
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Solution Overview
Problem
The existing star architecture for WLAN networks, with a base station and base station controller, faces data bottlenecks and high costs due to high routing and forwarding performance requirements, leading to increased forwarding delay, management complexity, and failure probability when handling handovers between access points.
Innovation Solution
A method involving a forwarding device that maintains a wireless access point table by updating, adding, or deleting entries based on data transmission and reception, and communicating with a network controller to ensure consistent data relationships between access points and home forwarding devices, thereby optimizing data forwarding and reducing network complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the star architecture with AC is used to manage multiple APs, then the network can provide centralized control and management, but the AC becomes a data bottleneck with high forwarding delay and performance requirements
Solution Approach 1:
The patent segments the centralized AC into multiple distributed forwarding devices (AGs), each capable of independent data forwarding. This distributes the forwarding burden from a single AC to multiple AGs, reducing the data bottleneck and forwarding delay while maintaining centralized control through logical grouping.
Solution Approach 2:
The patent introduces a new dimensional organization by grouping APs under multiple AGs in a many-to-many relationship, rather than the traditional one-to-many relationship under a single AC. This multi-dimensional forwarding structure allows data to be forwarded through multiple paths, reducing congestion and delay at any single point.
2Adaptability or versatility
If border router/BRAS is used for data forwarding at layer 3, then user attribute management can be performed, but the forwarding efficiency is low and cost is high
Solution Approach 1:
The patent extracts the data forwarding function from the layer 3 border router/BRAS and places it at the edge AGs, which operate at layer 2. This allows high-speed layer 2 forwarding at the edge while layer 3 processing and user attribute management remain at the core router, improving overall forwarding efficiency.
Solution Approach 2:
The patent introduces AGs as intermediary devices between APs and the core router. These AGs perform layer 2 forwarding and basic control functions, reducing the burden on the layer 3 router and improving forwarding efficiency while maintaining user attribute management capabilities.
3Speed
If high performance switches and routers are deployed in the bearer network, then data transmission capability is improved, but the superimposed architecture increases forwarding delay, management complexity and failure probability
Solution Approach 1:
The patent merges the service network (WLAN) and bearer network functions into a unified architecture where AGs perform both access control and data forwarding. This eliminates the superimposed architecture, reducing management complexity and failure probability while maintaining high data transmission capability.
Solution Approach 2:
The patent makes AGs universal devices that can perform multiple functions including data forwarding, control plane operations, and user profile management. This multi-functionality reduces the need for separate high-performance switches and routers, simplifying the network architecture while maintaining transmission capabilities.
4Area of stationary object
If one AC manages dozens to thousands of APs, then network coverage is expanded, but the routing performance and forwarding performance requirements of AC become excessively high
Solution Approach 1:
The patent segments the large-scale AC into multiple smaller AGs, each managing a subset of APs. This segmentation reduces the routing and forwarding performance requirements for each individual device while maintaining overall network coverage through the distributed AG structure.
Solution Approach 2:
The patent organizes APs in a many-to-many relationship with multiple AGs, creating a multi-dimensional forwarding structure. This allows load distribution across multiple AGs, reducing the performance burden on each individual AG while maintaining comprehensive network coverage.
Data Source
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AI summary
Disclosed are a method for processing wireless access, a forwarding device and a network controller, the method includes: the forwarding device establishing a wireless access point table for local access; the forwarding device maintaining the wireless access point table for local access according to whether a wireless access point in the wireless access point table for local access exists and a state of the wireless access point in the wireless access point table for local access. The embodiments of the present invention have achieved that the data of a corresponding relationship between APs and home forwarding devices are kept consistently under a pure WLAN network scenario or a multi-network integrated scenario in which the WLAN network accesses a mobile core network.