Network Management Nodes Governing Ingress Egress Rate Restrictions
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Solution Overview
Problem
Real-time data-intensive services over the Internet, such as streaming media and video conferencing, face quality issues due to the Internet Protocol's best effort packet switching mechanism, leading to susceptibility to losses and delays from higher priority transmissions, which undermines quality of service guarantees.
Innovation Solution
A network system with management nodes that enforce ingress and egress rate restrictions to prevent data transmissions that would violate these limits, ensuring quality of service guarantees by dynamically managing data flows and monitoring egress and ingress rates across nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If best effort packet switching is used for data transmission, then network flexibility and ease of operation are improved, but quality of service reliability deteriorates due to susceptibility to losses and delays
Solution Approach 1:
The system performs preliminary actions by pre-establishing rate restrictions and bandwidth reservations before data transmission begins. The management node pre-configures ingress and egress rate restrictions at network nodes, ensuring that quality of service parameters are guaranteed in advance before actual data flow occurs, thus preventing service degradation rather than reacting to it.
Solution Approach 2:
A management node is introduced as an intermediary between data sources and network nodes. This intermediary monitors data flows, enforces rate restrictions, and ensures quality of service compliance by preventing transmissions that would violate predetermined bandwidth allocations, thereby mediating between network flexibility and service reliability.
2Reliability
If rate restrictions are enforced at network nodes, then quality of service reliability is improved, but device complexity increases due to management nodes and monitoring requirements
Solution Approach 1:
Network nodes are equipped with self-service capabilities to autonomously enforce rate restrictions and monitor their own data flows. Each node independently tracks its ingress and egress rates and automatically applies restrictions without requiring constant external intervention, reducing the complexity burden on centralized management while maintaining reliability.
Solution Approach 2:
The system dynamically adjusts transmission parameters such as data rates and bandwidth allocations based on network conditions and service requirements. By changing operational parameters rather than system architecture, the solution maintains quality of service while minimizing the complexity of management infrastructure.
3Stability of the object's composition
If bandwidth is reserved for committed rates, then quality of service consistency is improved, but network resource utilization deteriorates due to unused reserved bandwidth
Solution Approach 1:
The bandwidth reservation system is made dynamic rather than static. Committed rates guarantee minimum service levels, but the system allows flexible allocation of unused reserved bandwidth to other traffic flows when needed. This dynamic adjustment maintains service consistency for guaranteed flows while improving overall network resource utilization by preventing reserved bandwidth from remaining idle.
Data Source
AI summary
A system and method for providing quality of service guarantees in a packet-switched network is provided. A network including nodes linked together by communication links includes a management node for governing the performance of the nodes. Ingress and egress rate restrictions are defined at the nodes and the management module may disallow a portion of a requested transmission to a node if the requested transmission would result in a violation of one of the ingress and egress rate restrictions. Disallowance of a requested transmission may be made by the management node if either an ingress rate restriction of the transmitting node or an egress of the receiving node would be violated by allowance of the requested transmission.