Link Control for Asymmetrical Switching Systems
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Solution Overview
Problem
Asymmetrical bandwidth in switching units leads to local congestion and packet loss in three-level switching systems, degrading network performance.
Innovation Solution
A link control method and apparatus that acquires and utilizes link information to manage bandwidth across switching units, ensuring input bandwidth does not exceed output bandwidth, thereby preventing congestion and packet loss by adjusting connection paths and rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If asymmetrical bandwidth configuration is used in switching units, then device complexity is reduced, but local congestion and packet loss occur
Solution Approach 1:
The patent applies preliminary action by calculating and determining the maximum input bandwidth for each input link before actual data transmission begins. The control unit pre-calculates bandwidth parameters based on output link capacities and connection relationships, then uses these pre-determined values to control admission of new connections and regulate traffic, preventing congestion before it occurs.
Solution Approach 2:
The patent implements feedback mechanisms where the control unit continuously monitors actual bandwidth usage against the maximum input bandwidth values, and dynamically adjusts connection admission decisions. When input bandwidth approaches the calculated maximum, the system feedback-controls incoming connection requests to maintain bandwidth balance, ensuring reliable network performance while handling asymmetrical configurations.
2Reliability
If bandwidth balancing control is implemented, then packet loss is reduced, but control complexity increases
Solution Approach 1:
The patent segments the bandwidth control function into distinct modules: a calculation unit that determines maximum input bandwidth values based on output capacities, and a control unit that separately handles connection admission control and traffic regulation. This segmentation allows each module to perform its specific function efficiently, reducing overall control complexity while maintaining reliable packet delivery.
Solution Approach 2:
The control system performs self-service by automatically calculating bandwidth parameters and making admission control decisions without external intervention. The control unit uses pre-stored connection relationship data and output bandwidth values to autonomously determine maximum input bandwidths and regulate traffic, reducing the need for complex external control mechanisms while ensuring reliable packet delivery.
Data Source
AI summary
Disclosed are a link control method and apparatus. The method includes that: link information and/or machine frame information in a system is acquired; and link control is performed according to the acquired link information and/or machine frame information. According to the technical solutions described in the disclosure, the problems of local congestion and packet loss in a three-level asymmetrical switching system can be effectively solved, the traffic level of the system is ensured, and the performance of the system is improved.