Access Point Acknowledgment Buffering for Network Timeout Prevention
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Solution Overview
Problem
Network timeouts occur due to variations in round trip times across different networks, leading to unnecessary retransmissions that disrupt data flow and increase processing burdens, as existing protocols like TCP may mistake delayed acknowledgments for lost packets.
Innovation Solution
Implementing a mechanism where an access point temporarily buffers acknowledgments until a calculated delay time period expires before forwarding them to the sender, reducing the variability in round trip times and minimizing retransmission timeouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sender uses a fixed retransmission timeout value based on average RTT, then the protocol simplicity is maintained, but false timeouts occur when network RTT varies significantly
Solution Approach 1:
The patent implements dynamic RTT sampling and adaptive timeout adjustment, where the sender continuously monitors actual RTT values and adjusts the timeout threshold dynamically. This resolves the contradiction by making the timeout value adaptive to actual network conditions rather than fixed, preventing false timeouts while maintaining protocol simplicity through automated adjustment mechanisms.
Solution Approach 2:
The patent changes the timeout parameter from a static value to a dynamic value based on sampled RTT measurements. By continuously updating the timeout threshold according to actual network performance, the system maintains reliability across varying network conditions without increasing protocol complexity, as the adjustment is handled automatically through parameter change mechanisms.
2Reliability
If the sender retransmits packets upon timeout, then data delivery reliability is improved, but unnecessary retransmissions occur when ACKs are merely delayed
Solution Approach 1:
The patent implements preliminary RTT sampling and timeout threshold adjustment before actual data transmission begins. By pre-characterizing the network RTT and setting appropriate timeout values in advance, the system prevents false timeouts and unnecessary retransmissions, maintaining data delivery reliability while avoiding disruptions to data flow efficiency.
Solution Approach 2:
The patent implements continuous RTT measurement and feedback mechanisms that monitor actual network performance and adjust timeout thresholds dynamically. This feedback loop ensures that retransmissions only occur when truly necessary, preventing unnecessary retransmissions while maintaining reliable data delivery through adaptive timeout adjustment based on real-time network conditions.
3Reliability
If the system accounts for network RTT variations, then timeout accuracy is improved, but the processing overhead increases
Solution Approach 1:
The patent implements selective RTT sampling rather than continuous monitoring, performing measurements on a partial basis to characterize network behavior. This approach achieves sufficient timeout accuracy for preventing false timeouts while minimizing processing overhead by avoiding excessive measurement and adjustment activities, balancing reliability improvement with energy efficiency.
Data Source
AI summary
The disclosed technology addresses the need in the art for a solution configured to prevent network retransmission timeouts. A system is configured to receive a data packet originating from a sender and forward the data packet to a receiver. The system receives, from the receiver, an acknowledgment message that corresponds to the data packet and holds the acknowledgment message in a buffer until a delay time period expires, wherein the delay time period is determined based on a log of acknowledgment times. When the delay time period expires, the system forwards the acknowledgement to the sender.