Terminating Endpoint Call Admission Control for IP Network QoS
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Solution Overview
Problem
In packet networks like IP networks, establishing reliable and high-quality connections is challenging due to the lack of physical connections, making continuous monitoring and quality assurance impractical, leading to potential connection failures or low-quality connections.
Innovation Solution
Implementing call admission control at the terminating endpoint of a logical connection, where quality of service data is stored and used to determine whether to accept or reject incoming calls, and optionally initiating a voice path assurance test if data is not available, allowing for endpoint-based testing and ensuring acceptable quality of service levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring is implemented in packet networks to ensure connection quality, then connection reliability can be improved, but device complexity and operational difficulty increase significantly due to the dynamic nature of packet network connections
Solution Approach 1:
The patent applies preliminary action by performing call admission control before the actual connection is established. The terminating endpoint evaluates QoS metrics and connection quality in advance, making admission decisions before traffic flows. This prevents poor-quality connections from being established, thereby ensuring reliability without requiring complex continuous monitoring systems during connection establishment.
2Reliability
If endpoint-based call admission control with QoS metrics is implemented, then connection quality can be ensured, but the system complexity increases due to metric collection and evaluation requirements
Solution Approach 1:
The patent implements self-service by enabling the terminating endpoint to autonomously collect, evaluate, and make admission decisions based on QoS metrics without requiring external network-based testing or control mechanisms. The endpoint independently monitors its own incoming traffic patterns and connection quality, making the system self-sufficient and reducing overall network complexity while maintaining connection quality assurance.
3Reliability
If network-based connectivity testing is performed, then connection quality can be verified, but the testing becomes impractical in packet networks due to the lack of physical connections
Solution Approach 1:
The patent applies inversion by reversing the traditional approach: instead of having the originating endpoint or network perform connectivity testing, the terminating endpoint performs the evaluation. This inversion makes testing practical in packet networks by leveraging the terminating endpoint's ability to observe incoming connection attempts and evaluate QoS metrics before admission, transforming an impractical network-based testing problem into an executable endpoint-based solution.
Data Source
AI summary
A method and apparatus for providing call admission control in a packet network such as an internet protocol (IP) network are provided. More particularly, a terminating endpoint of a logical connection on a packet network, e.g. an IP network, is provided with the ability to make a decision on whether to accept or reject an incoming call based on quality of service (QoS) indicator based on QoS metrics. These metrics indicate quality of service levels for specific logical connections and are accumulated over specified time periods.