Wireless Network TCP Acknowledgment Suppression via 802.11 Proxy
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Solution Overview
Problem
Current communication networks, particularly wireless networks, face inefficiencies due to high protocol overhead from multiple acknowledgments, which limit data transmission rates and bandwidth, especially in unidirectional data transfers where TCP ACKs carry no data, increasing network traffic and reducing actual data throughput.
Innovation Solution
Implementing a method to suppress unnecessary TCP acknowledgments by using 802.11 acknowledgments as a proxy, allowing the access point to determine data receipt and reduce the number of acknowledgments transmitted over the wireless link, thereby enhancing data transmission rates and improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple acknowledgments (TCP ACKs and 802.11 ACKs) are transmitted to ensure reliable data delivery, then data reliability is improved, but protocol overhead increases and data throughput decreases
Solution Approach 1:
The patent merges the functions of TCP acknowledgment and 802.11 acknowledgment into a single 802.11 ACK frame. The access point suppresses the TCP ACK and uses the 802.11 ACK to simultaneously acknowledge both the 802.11 data frame and the embedded TCP segment, eliminating redundant acknowledgment transmissions while maintaining reliable data delivery.
Solution Approach 2:
The patent extracts the TCP acknowledgment function from the separate TCP protocol layer and integrates it into the 802.11 MAC layer acknowledgment mechanism. By taking out the redundant TCP ACK transmission and replacing it with a single 802.11 ACK that carries both MAC and TCP acknowledgment information, the system reduces overhead while preserving reliability.
2Reliability
If TCP ACKs are transmitted for every data packet to confirm receipt, then data reliability is improved, but network traffic increases and bandwidth efficiency decreases
Solution Approach 1:
The patent combines the acknowledgment of 802.11 data frames and TCP segments into a single 802.11 ACK frame. This merged acknowledgment simultaneously verifies receipt of both the MAC layer frame and the embedded TCP data, reducing the total number of acknowledgment packets transmitted while maintaining complete verification of data delivery.
Solution Approach 2:
The 802.11 ACK frame is designed to serve multiple functions simultaneously: it acknowledges receipt of the 802.11 data frame at the MAC layer and also acknowledges the embedded TCP segment at the transport layer. This multi-functional acknowledgment eliminates the need for separate TCP ACKs, reducing network traffic volume while maintaining comprehensive reliability verification.
3Reliability
If acknowledgment frames are transmitted at every data transmission step, then data reliability is improved, but the physical communication channel becomes overloaded
Solution Approach 1:
The patent merges multiple acknowledgment functions into a single 802.11 ACK frame transmission. Instead of transmitting separate TCP ACKs and 802.11 ACKs as distinct frames that both consume physical channel resources, the system transmits one combined ACK frame that acknowledges both layers, reducing the burden on the physical communication channel while maintaining reliability.
Data Source
AI summary
Systems and methods for improving data transmission rates in communication networks are disclosed. In an 802.11 wireless communication network, where a source node of the wireless network transmits TCP data to a destination node of the wireless network, the destination node does not transmit TCP acknowledgments (ACKs) for the TCP data if 802.11 ACKs indicate that the destination node received the TCP data. If a source outside the wireless network transmits TCP data to the destination node within the wireless network through an intermediate device, such as an access point, the destination node suppresses transmitting TCP ACKs. The intermediate device transmits TCP ACKs as proxy for the destination node to the source. The intermediate device also suppresses TCP ACKs where a source node within the wireless network sends the TCP data to a destination node outside of the wireless network.