TCP Transmission Control for 5G Networks
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Solution Overview
Problem
Conventional TCP algorithms prioritize transmission rate over delay performance, leading to inefficiencies in achieving high transmission rates while maintaining low time delays, especially in dynamic wireless communication networks like 5G, where fairness and adaptability are crucial.
Innovation Solution
A TCP-based transmission control method that estimates a target maximum transmission rate and minimum round trip time, updating the congestion window and reception window to balance transmission rate and delay, ensuring high throughput and low latency through adaptive control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TCP algorithms aggressively increase packet transmission to fast detect available bandwidth, then transmission rate is improved, but fairness with other TCP flows deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the congestion window (CWND) based on real-time network conditions. The algorithm transitions between different operational modes (fast detection mode and fairness mode) depending on network state, allowing the system to optimize between transmission rate and fairness dynamically rather than using a static approach
Solution Approach 2:
The patent employs feedback mechanisms where the transmitter monitors network conditions (packet loss, delay, available bandwidth) and adjusts the CWND accordingly. The receiver also provides feedback through window advertisements, creating a closed-loop control system that balances transmission rate and fairness based on actual network performance
2Measurement precision
If TCP algorithms use loss-based congestion detection, then available bandwidth is detected accurately, but packet loss increases
Solution Approach 1:
The patent introduces delay-based detection as an intermediary mechanism to infer network congestion conditions without relying solely on packet loss. By monitoring round-trip time (RTT) changes, the system can detect available bandwidth and congestion points before packet loss occurs, using delay information as a mediator to guide transmission control
Solution Approach 2:
The patent performs preliminary delay measurement and analysis to predict congestion conditions before they manifest as packet loss. By continuously monitoring RTT and detecting trends in delay, the system can take preventive actions to adjust transmission rate before actual loss occurs, enabling proactive rather than reactive congestion management
3Productivity
If TCP algorithms focus on maximizing transmission rate, then productivity is improved, but time delay increases
Solution Approach 1:
The patent implements dynamic balancing between transmission rate and delay by continuously adjusting the congestion window based on real-time measurements of both bandwidth availability and RTT. The system transitions between aggressive rate maximization and delay-optimized modes depending on current network conditions, allowing flexible trade-off between these two parameters
Solution Approach 2:
The patent changes the control parameters of the TCP algorithm dynamically, adjusting the growth rate of the congestion window, the threshold for rate maximization, and the weighting of delay versus bandwidth considerations. This allows the system to optimize different parameter combinations to achieve either high transmission rate or low delay depending on application requirements and network conditions
4Productivity
If TCP algorithms are designed for high-speed transmission, then transmission rate is improved, but adaptability to changing network conditions deteriorates
Solution Approach 1:
The patent implements a dynamic TCP algorithm that automatically adapts to changing network conditions including variable bandwidth, loss patterns, and delay characteristics. The system monitors network state and adjusts its behavior in real-time, transitioning between different operational modes to maintain optimal performance across diverse network environments rather than being optimized for a single condition
Solution Approach 2:
The patent designs a universal TCP algorithm that can handle multiple network conditions and scenarios through a single unified approach. The algorithm incorporates multiple detection mechanisms (loss-based, delay-based, available bandwidth detection) and can operate effectively in various network topologies and conditions, making it broadly applicable rather than specialized for one particular scenario
Data Source
AI summary
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data rate beyond a 4G communication system such as LTE. In addition, the present disclosure relates to a TCP-based transmission control method and apparatus which can reduce a delay time while improving a transmission rate in a communication system. A method for TCP-based transmission control in a communication system according to an embodiment of the present disclosure comprises the steps of: determining a maximum target transmission rate for TCP control using maximum congestion windows (CWNDs) estimated at predetermined times; determining a minimum target round trip time (RTT) for the TCP control using minimum RTTs estimated at the predetermined times; and updating at least one of a congestion window (CWND) and a receive window (RWND) in an RTT time slot, using the maximum target transmission rate and the minimum target RTT.