Route Control Device for IP Network Congestion Management
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Solution Overview
Problem
In IP networks, real-time communication of audio and video information leads to network congestion due to the concentration of sessions, causing quality deterioration, and existing methods like RSVP require recognition from both server and terminal devices, resulting in delayed session start-ups.
Innovation Solution
A route control device that detects new sessions and selects routes with lighter loads using a processor to manage packet transfer between information processing devices, ensuring efficient bandwidth allocation and minimizing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RSVP is used to secure bandwidth before session start, then network congestion is prevented, but session establishment time increases
Solution Approach 1:
The system performs preliminary route selection and transfer destination setting based on load information before the session actually starts. The route control device selects a route with light load in advance and notifies transfer devices to set transfer destinations, so that when the session begins, the path is already prepared and bandwidth is effectively reserved without the time-consuming RSVP signaling process.
2Speed
If a route with fewer hops is selected, then transmission speed is improved, but network congestion worsens due to concentration of sessions
Solution Approach 1:
The system dynamically selects routes based on real-time load information rather than using a fixed criterion like fewest hops. The route control device acquires load information from transfer devices and dynamically determines the most appropriate route for each session, balancing transmission speed with load distribution to prevent network congestion.
Solution Approach 2:
The system implements feedback by continuously acquiring load information from transfer devices and using this information to make route selection decisions. The route control device receives load status updates and adjusts route selection accordingly, creating a closed-loop control system that prevents congestion by routing sessions away from overloaded paths.
3Object-generated harmful factors
If load balancing is implemented across multiple routes, then network congestion is reduced, but route selection complexity increases
Solution Approach 1:
The system extracts the route selection and load balancing logic from individual information processing devices and concentrates it in a dedicated route control device. This centralizes the complexity of monitoring load information and making routing decisions, while the information processing devices themselves remain simple and unchanged, reducing the overall system complexity burden.
Data Source
AI summary
A route control device controls a transfer destination in a plurality of transfer devices that are included in a network and that transfer packets flowing between a first information processing device and a second information processing device. The route control device comprises a processor. The processor detects that a session is to be newly established, on the basis of a packet of a protocol that controls establishment of a session between the first information processing device and the second information processing device, selects a route with a light load from among a plurality of routes connecting the first information processing device and the second information processing device, and makes a transfer device on a selected route establish a selected route.