Service Admission Path Control for Network QoS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing service admission control mechanisms in communication networks do not effectively manage end-to-end Quality of Service (QoS) by ignoring physical link capacities, topologies, and routing schemas, leading to congestion and degradation of real-time services like VoIP, video, and circuit emulation.
Innovation Solution
A Service Admission Path Control (SAPC) mechanism that aligns with lower layer topologies and capacities, using a decentralized architecture to control service admission based on network, link, and partitioning topologies, incorporating a service routing mechanism, precedence and pre-emption, and hop counting to ensure efficient bandwidth allocation and service prioritization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing CAC mechanisms are used at the application layer, then call connections are limited and CPU overload is avoided, but end-to-end QoS cannot be controlled according to low layer topology and capabilities
Solution Approach 1:
The patent segments the admission control function into multiple hierarchical levels: network-level CAC, link-level CAC, and application-level CAC. Each level operates independently with its own thresholds and policies, allowing QoS control at different granularities without requiring a single complex monolithic system. This segmentation enables end-to-end QoS control while maintaining manageable complexity at each layer.
Solution Approach 2:
The patent introduces an intermediary mechanism that bridges the application layer and low layers (physical and data link layers). This intermediary translates high-level QoS requirements into low-layer admission control parameters and vice versa, enabling coordinated QoS control across layers without direct coupling between application layer and physical infrastructure.
2Reliability
If CAC thresholds are allocated per Call-control machine, then CPU power is protected, but physical link capacities and topologies are not considered
Solution Approach 1:
The patent implements local quality by allocating CAC thresholds at multiple granularities: per Call-control machine for CPU protection, per physical link for capacity management, and per network path for topology-aware routing. Each threshold is optimized for its specific location and function, allowing the system to simultaneously protect CPU resources while adapting to physical link capacities and topologies.
Solution Approach 2:
The patent adds dimensional depth to admission control by introducing hierarchical levels (network, link, application) and spatial dimensions (multiple paths, topologies). Instead of a single flat CAC threshold, the system operates in a multi-dimensional space where thresholds can be set independently for different machines, links, and paths, enabling both CPU protection and topology awareness simultaneously.
3Reliability
If multiple CAC mechanisms are deployed at different layers, then comprehensive QoS control is achieved, but system complexity and coordination overhead increase
Solution Approach 1:
The patent implements feedback mechanisms where each CAC level monitors its local conditions (CPU load, link utilization, queue depth) and adjusts its thresholds dynamically. Higher-level CAC mechanisms receive feedback from lower levels about actual resource availability, and lower levels receive guidance from higher levels about QoS priorities. This coordinated feedback loop achieves end-to-end QoS control while preventing conflicting decisions that would increase complexity.
Data Source
AI summary
A service admission control method in a communication network comprising at least one group of at least one node per group, the method comprising the steps: Receive a service establishment attempt from one group; and admit the service in the network depending on the granularity of the network topology, the link topology and/or the partitioning of the link topology.