Channel Quality Assisted TCP Transport for Wireless Throughput
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Solution Overview
Problem
High-frequency wireless networks, such as 5G, face challenges with frequent link variations and dynamic network capacity due to blockages and channel quality fluctuations, leading to throughput degradation and inefficient bandwidth utilization.
Innovation Solution
The proposed method and system for Channel Quality Assisted (CQA) transport enhance congestion/flow control and delay optimization by evaluating real-time channel quality using radio protocol stack information and sending explicit channel quality notifications to the TCP sender for adaptive transport layer adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TCP congestion control is used without channel quality awareness, then the protocol is simple to implement, but throughput degradation occurs during channel quality fluctuations
Solution Approach 1:
The patent implements feedback mechanisms where the receiver monitors channel quality indicators (CQI) and sends explicit notifications to the transmitter about channel conditions. This feedback loop enables the TCP protocol to adapt its congestion control parameters based on actual wireless channel quality, preventing throughput degradation during fluctuations while maintaining reasonable protocol complexity through targeted information exchange.
Solution Approach 2:
The patent introduces channel quality indicators (CQI) as an intermediary element that mediates between the physical layer wireless channel conditions and the transport layer TCP protocol. These CQI values serve as intermediate information that bridges the gap between raw channel measurements and TCP congestion control decisions, enabling adaptive behavior without requiring direct complex interaction between all protocol layers.
2Reliability
If traditional congestion control methods are used, then implementation is straightforward, but misinterpretation of wireless losses as congestion occurs
Solution Approach 1:
The patent employs feedback mechanisms where the receiver provides explicit channel quality notifications to the transmitter. This feedback distinguishes between packet losses caused by wireless channel conditions versus actual network congestion, enabling more accurate congestion control decisions. The transmitter uses this feedback information to adjust its sending rate appropriately, avoiding misinterpretation of wireless losses as congestion while maintaining manageable control mechanism complexity.
Solution Approach 2:
The patent changes the parameters used for congestion detection by incorporating channel quality indicators (CQI) alongside traditional packet loss metrics. By monitoring changes in CQI parameters over time and comparing them with packet loss events, the system can differentiate between wireless channel degradation and actual network congestion, improving congestion control accuracy without excessive complexity through parameter correlation analysis.
3Reliability
If TCP variants are evolved to identify wired and wireless losses, then loss identification improves, but capability to cope with channel quality variations remains insufficient
Solution Approach 1:
The patent implements feedback mechanisms where the receiver monitors channel quality indicators (CQI) and sends explicit notifications to the transmitter about channel conditions. This feedback loop enables the TCP protocol to adapt its congestion control parameters based on actual wireless channel quality, preventing throughput degradation during fluctuations while maintaining reasonable protocol complexity through targeted information exchange.
Solution Approach 2:
The patent introduces dynamic adaptation mechanisms that allow the TCP protocol to adjust its behavior in real-time based on channel quality variations. The system dynamically modifies congestion control parameters, window sizes, and sending rates in response to changing wireless conditions, transitioning from static loss identification to dynamic channel quality adaptation while maintaining protocol stability through controlled adjustment rates and threshold-based triggering.
4Productivity
If base station uses CQI for resource scheduling, then resource allocation is optimized, but abrupt variation in ADR is experienced by end-users
Solution Approach 1:
The patent applies preliminary action by having the receiver proactively monitor channel quality indicators (CQI) and predict potential data rate variations before they occur. When channel quality degradation is detected, the system preemptively adjusts the TCP sending rate and window sizes to prevent abrupt ADR variations. This preliminary adjustment smooths out data rate transitions while maintaining efficient resource allocation based on actual channel conditions.
Solution Approach 2:
The patent introduces dynamic adaptation mechanisms that allow the TCP protocol to adjust its behavior in real-time based on channel quality variations. The system dynamically modifies congestion control parameters, window sizes, and sending rates in response to changing wireless conditions, transitioning from static loss identification to dynamic channel quality adaptation while maintaining protocol stability through controlled adjustment rates and threshold-based triggering.
Data Source
AI summary
The disclosure provides a method of Channel Quality Assisted (CQA) transport by a Transmission Control Protocol (TCP) receiver in a wireless network. The method includes: monitoring quality of a wireless channel based on at least one of signal quality parameters and wireless channel events; detecting a fluctuation in the quality of the wireless channel; and sending an indication of the fluctuation in the quality of the wireless channel to a TCP transmitter configured to adjust at least one parameter of a transport layer based on the fluctuation in the quality of the wireless channel.