Transaction Boundary Detection for TCP Timeout Reduction
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Solution Overview
Problem
Conventional Performance Enhancing Proxies (PEPs) for TCP/IP networks require significant resources, cause additional latency, and disrupt existing network infrastructure, leading to inefficiencies and compatibility issues, especially in environments with high packet loss and long round trip times.
Innovation Solution
A method for transmitting data in a ping-pong network connection that avoids TCP retransmission timeouts by sending additional packets to generate early acknowledgements, reducing latency and resource usage, and allowing seamless integration with existing networks without modifying utilities or security settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional PEPs are deployed to improve TCP performance in high packet loss and long RTT environments, then TCP performance is improved, but network infrastructure is disrupted and compatibility issues arise
Solution Approach 1:
The system enables endpoints to autonomously detect transaction boundaries and implement timeout avoidance mechanisms without requiring external PEP intervention. Each endpoint independently monitors acknowledgment patterns and adjusts its transmission strategy, eliminating the need for infrastructure-disrupting proxy devices while maintaining improved TCP performance.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of additional acknowledgment-requesting packets that mediate between the sender and receiver. These intermediary packets enable the sender to receive acknowledgments before the actual transaction boundary, thereby avoiding timeout penalties without disrupting the existing network infrastructure or requiring infrastructure changes.
2Loss of time
If conventional PEPs are deployed to reduce timeout penalties, then latency is reduced, but resource consumption increases
Solution Approach 1:
The system sends a limited number of additional packets specifically targeted at obtaining acknowledgments before transaction boundaries, rather than continuously sending excessive packets. This partial action approach achieves timeout avoidance while controlling resource consumption by only transmitting the minimum necessary packets to trigger the acknowledgment mechanism.
Solution Approach 2:
The sender proactively transmits additional packets before the actual transaction boundary is reached, preliminarily securing acknowledgments in advance. This preliminary action prevents timeout penalties from occurring in the first place, eliminating the need for reactive retransmissions and reducing overall processing resource consumption.
3Reliability
If additional packets are sent to generate early acknowledgments, then timeout penalties are avoided, but network traffic increases
Solution Approach 1:
The patent merges the functionality of data transmission and acknowledgment elicitation into a single packet stream. Additional packets are combined with normal data flow, and acknowledgments are piggybacked on existing communication channels. This merging reduces the overhead of separate acknowledgment mechanisms and minimizes the net increase in network traffic while maintaining reliable timeout avoidance.
Data Source
AI summary
One or more flow control modules, implemented on various types of network topologies, provide a number of functionalities for controlling the flow of IP packets (such as TCP/IP packets) over a network connection. The flow control modules may be implemented within a sender and/or receiver or may be deployed into a network as a separate device without requiring significant additional resources.