Access Control Function for Packet Stream Permissibility Checking
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Solution Overview
Problem
Current packet-oriented communications networks lack a mechanism for ensuring service quality, particularly for real-time services like VoIP, where delays and packet losses can degrade transmission quality, and there is no standardized method for permissibility checking of packet streams in networks like the Internet.
Innovation Solution
Implementing an access control function that checks the permissibility of packet stream transmission based on overall transmission capacity, allowing for flexible adaptation to changes in available capacity and ensuring service quality levels by prioritizing traffic streams without requiring changes to transmission nodes, and integrating this function into existing infrastructure like DiffServ networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If packet-oriented transmission is used for real-time services, then network convergence and flexibility are improved, but service quality cannot be ensured
Solution Approach 1:
The patent segments traffic into different classes (real-time and non-real-time) and applies different transmission policies to each class. This allows the network to maintain flexibility in handling diverse traffic types while ensuring service quality for real-time services through prioritized transmission and dedicated capacity allocation.
2Reliability
If permissibility checking is performed at transmission nodes, then service quality control is improved, but network complexity increases
Solution Approach 1:
The patent extracts the permissibility checking function from transmission nodes and places it at the network edge (access control function). This separation reduces the complexity of transmission nodes while maintaining service quality control capability through centralized capacity management and access control mechanisms.
3Reliability
If capacity is allocated conservatively, then service quality is ensured, but network utilization decreases
Solution Approach 1:
The patent implements dynamic capacity allocation where the access control function continuously monitors available capacity and adjusts permissibility decisions in real-time. This dynamic approach allows the network to allocate capacity conservatively when needed to ensure service quality while maximizing utilization during periods of lower demand, avoiding both over-provisioning and excessive rejection of legitimate traffic.
Data Source
AI summary
An access control function (ZF) which checks a requested use (NU) of a service (DI) by considering an available capacity Cv which is detected by considering the entire transmission capacity (G) and is available to an access node (ZK) for transmitting traffic flows (VS) to the communications network. The service is carried out in at least one communications network (KN) that is provided with an entire transmission capacity (G). The access node (ZK) is allocated to the access control function (ZF) which checks the requested use (NU) of the service (DI).