Access Equipment QoS Control via Logical Link Channels
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Solution Overview
Problem
Existing QoS control methods in Next Generation Networks (NGNs) are inadequate in managing network congestion at access networks, particularly due to limited resources, leading to suboptimal quality of service for high-bandwidth applications like video chatting and BT downloading, as they primarily focus on edge devices and gateways without effective control in the access aggregation network.
Innovation Solution
A method and system that utilize a logical link management function to assign and manage logical link channels based on transmission priorities, enabling QoS control at access equipment by classifying and prioritizing flows, thereby improving QoS management and preventing unauthorized use of priority information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS control is only performed at edge devices and gateways, then device complexity is reduced, but network congestion cannot be effectively managed in access networks
Solution Approach 1:
The QoS control function is segmented into multiple components: flow classification at access equipment, logical link channel assignment by logical link management function entity, and priority-based control. This segmentation allows QoS control to be distributed across different network elements, improving effectiveness without concentrating all control complexity in one device
Solution Approach 2:
A logical link management function entity is introduced as an intermediary between the access equipment and the core network. This intermediary handles the complex tasks of logical link channel assignment and priority management, allowing access equipment to perform QoS control without bearing the full complexity burden
2Productivity
If access bandwidth is increased to handle high-bandwidth applications, then application quality improves, but network resources are wasted when not needed
Solution Approach 1:
The system dynamically assigns logical link channels and adjusts priority levels based on real-time network conditions and application requirements. Access equipment performs dynamic QoS control by classifying flows and assigning them to appropriate logical link channels, allowing bandwidth to be allocated on-demand rather than statically provisioned
Solution Approach 2:
The system changes the parameter of logical link channel assignment based on flow priority and network conditions. By varying the logical link channel assignment and priority levels dynamically, the system can optimize bandwidth utilization for different applications without permanently allocating excessive resources
3Measurement precision
If flow priority information is made accessible to terminal equipment for classification, then QoS control precision improves, but unauthorized use of priority information may occur
Solution Approach 1:
The system provides different levels of information access to different network elements. Terminal equipment receives only flow classification information needed for local classification tasks, while priority assignment and logical link channel management are handled by the logical link management function entity. This localized information distribution achieves necessary precision without exposing sensitive priority information
Data Source
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AI summary
A QoS control method is disclosed, comprising: receiving, by an access equipment, an relationship between transmission priorities of flows and logical link channels of flows from a logical link management function entity;receiving from a terminal equipment via a logical link channel; identifying a transmission priority of the flow corresponding to the logical link channel according to the relationship; performing QoS control over the flow via the logical link channel according to the transmission priority. An access equipment is also disclosed.