Network Traffic Control via PID-Based Upstream Downlink Correlation
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Solution Overview
Problem
P2P traffic, primarily based on the UDP protocol, is difficult to control in enterprise and service provider networks, leading to bandwidth wastage, time delays, and reduced speeds for other applications due to the absence of effective congestion control mechanisms, while traditional traffic control methods fail to manage upstream bandwidth effectively.
Innovation Solution
A method and device for network traffic control that utilizes a PID control formula to calculate errors in downlink traffic, adjusts upstream traffic thresholds based on PID output, and includes an adaptive function to regulate PID parameters, ensuring dynamic control of both upstream and downlink traffic to optimize bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional traffic control methods are used, then TCP traffic can be controlled well, but UDP traffic cannot be controlled and occupies much bandwidth
Solution Approach 1:
The patent extends traffic control capabilities to handle both TCP and UDP protocols uniformly. The network device intercepts and inspects packets from both protocol types, applying consistent control policies (priority queuing, rate limiting) to both, thereby achieving universal control functionality across different transport protocols.
Solution Approach 2:
The patent introduces a network device as an intermediary between senders and receivers. This intermediary intercepts packets, inspects their characteristics, and applies control policies before forwarding them. The intermediary enables external control of UDP traffic without modifying the UDP protocol itself, using techniques like packet interception, inspection, and selective forwarding.
2Ease of operation
If upstream bandwidth is controlled separately from downlink bandwidth, then downlink traffic can be managed, but upstream traffic control is unclear and ineffective
Solution Approach 1:
The patent merges upstream and downlink traffic control into a unified system. The network device intercepts and inspects both upstream and downlink packets, applying coordinated control policies to both directions. This unified approach simplifies operation by providing consistent control mechanisms for both upstream and downlink traffic, while maintaining the ability to differentiate and prioritize specific traffic types in each direction.
Data Source
AI summary
A method and a device for network traffic control comprising the following steps: detecting actual downlink traffic of a network device; calculating an error e between the actual downlink traffic and predetermined downlink traffic; performing a calculation on the error to obtain PID output according to a PID control formula; calculating scaling of upstream traffic according to the calculated PID output and the downlink traffic; and regulating an upstream traffic threshold according to the scaling. The upstream traffic is increased or reduced in accordance with the actual downlink traffic be means of the correlated regulation and dynamic control of the upstream traffic and the downlink traffic of the network device. As such, traffic control is realized in those applications (e.g. UDP traffic such as P2P streaming media) which themselves lack the traffic control mechanism, and it is possible to make the best of network bandwidth as well.