Selective Packet Forwarding for Guaranteed QoS
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Solution Overview
Problem
The traditional Internet model is inadequate for applications requiring low latency and high bandwidth, as it provides a best-effort service that can result in congestion and packet loss, especially for interactive and real-time communications, and existing Quality of Service (QoS) frameworks face challenges in providing guaranteed services across administrative domains.
Innovation Solution
An application-specific selective packet-forwarding device redirects latency or bandwidth-sensitive traffic to a dedicated transport network with guaranteed bandwidth, integrating with standard IP networks and protocols like SIP and H.323, and using control or data-driven operations to manage packet forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If best-effort service is used in the traditional Internet model, then device complexity is reduced and ease of operation is improved, but network quality deteriorates with congestion and packet loss
Solution Approach 1:
The patent segments network traffic into different classes (e.g., real-time, non-real-time) and routes them through different paths or handles them with different priorities. This segmentation allows critical traffic to receive guaranteed service while maintaining simplicity for best-effort traffic, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The patent introduces intermediary components such as border routers, gateway devices, or network controllers that implement QoS policies at strategic points in the network. These intermediaries handle the complexity of quality guarantee mechanisms centrally, allowing endpoint devices to remain simple while still achieving reliable service for critical traffic.
2Reliability
If private wide area networks are established to improve network quality, then network reliability is improved, but cost increases significantly
Solution Approach 1:
The patent creates a multi-functional network architecture where a single public network infrastructure provides both best-effort service for general traffic and guaranteed QoS service for critical traffic. This universal infrastructure eliminates the need for separate private networks while maintaining reliability for applications that require it.
Solution Approach 2:
The patent applies quality guarantees locally to specific traffic flows or applications rather than providing universal high-quality service across the entire network. This allows QoS mechanisms to be activated only where needed, reducing overall cost while maintaining reliability for critical communications.
3Adaptability or versatility
If overlay or peer-to-peer architectures are used to influence packet path, then adaptability is improved, but network quality cannot be improved without capacity guarantees
Solution Approach 1:
The patent implements dynamic path selection and QoS policy adjustment based on current network conditions, application requirements, and traffic characteristics. This dynamic approach allows the system to adaptively route traffic through optimal paths and apply appropriate quality guarantees, combining the adaptability of overlay architectures with actual quality improvements.
Solution Approach 2:
The patent incorporates feedback mechanisms that monitor network conditions, traffic patterns, and quality metrics to dynamically adjust routing decisions and QoS parameters. This feedback loop enables the system to maintain both adaptability in path selection and reliability in service quality by continuously optimizing based on actual performance data.
Data Source
AI summary
A system and method of operating equipment and services to allow enhanced global transport of IP packets is presented. A global virtual network with guaranteed capacity is used to transport said IP packets. A number of application-specific forwarding devices are deployed to detect and forward selected traffic types to the virtual network. The application-specific selective forwarding devices can be implemented based on the IP packets analysis, or by deploying enhanced control protocols like SIP/H.323.