Dynamic Rate Limiting of Background Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Peer-to-peer file sharing applications cause network congestion, leading to delays for interactive applications due to inefficient rate limiting strategies that restrict peer-to-peer traffic even when there is no competing web traffic, resulting in suboptimal network utilization.
Innovation Solution
Implementing a system that dynamically rate limits background traffic in peer-to-peer networks by measuring ICMP echo round-trip times and losses to identify congestion points, using control laws like Additive Increase with Multiplicative Decrease (AIMD) to adjust upload rates, and ensuring a balance between peer-to-peer and interactive traffic through starvation prevention mechanisms, all without requiring network support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If peer-to-peer traffic is rate-limited at all times, then network congestion is reduced, but network utilization efficiency deteriorates when no competing traffic is present
Solution Approach 1:
The patent implements dynamic rate limiting by continuously monitoring network congestion conditions and adjusting peer-to-peer traffic rates in real-time. When congestion is detected, rate limiting is applied; when no congestion exists, rates are increased to maximize utilization. This dynamic adaptation resolves the contradiction between preventing congestion and maintaining efficiency.
Solution Approach 2:
The system employs feedback mechanisms by measuring network congestion metrics and using this information to adjust rate limiting parameters. The feedback loop monitors actual network conditions and modifies peer-to-peer traffic rates accordingly, ensuring rate limiting is applied only when necessary rather than continuously, thus resolving the efficiency-congestion tradeoff.
2Measurement precision
If end-to-end congestion control is used, then all bottlenecks in the path are monitored, but local access point congestion cannot be prioritized
Solution Approach 1:
The patent applies local quality by focusing congestion control measurements and rate limiting actions specifically on the local access point bottleneck rather than treating all network bottlenecks equally. The system identifies and prioritizes congestion at the user's own access point, applying differentiated control strategies for local versus distant bottlenecks, thus resolving the contradiction between comprehensive monitoring and local prioritization.
3Reliability
If peer-to-peer traffic is treated as background traffic, then higher-priority traffic is deferred to, but excess capacity is consumed by background traffic
Solution Approach 1:
The system dynamically adjusts peer-to-peer background traffic rates based on detected congestion conditions. When congestion is present, rates are reduced to prioritize higher-priority traffic. When no congestion exists, background traffic is allowed to consume excess capacity fully. This dynamic behavior resolves the contradiction between service differentiation and capacity utilization.
Data Source
AI summary
Dynamic rate limiting of background traffic to alleviate congestion in the access network is enabled. ICMP echo round-trip times and ICMP losses to a nearby node outside the local area and just beyond the divergence in end-to-end paths are measured, allowing unambiguous discrimination of nearby from distant congestion points. Using round-trip time samples, either short-run delay or short-run variance in delay can be measured to estimate congestion. When combined with an appropriate control law, background traffic can be rapidly reduced to allow interactive traffic to traverse unhindered through the access network. The described system and methods can be implemented in the application-layer and without any additional support from the network.