TCP Throughput Modeling for Power Control in Mobile Wireless
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Solution Overview
Problem
Highly mobile broadband systems face challenges in maintaining TCP throughput due to varying channel conditions, particularly fading and path loss, which affect data rates and require effective power control measures to mitigate these issues.
Innovation Solution
A method to model TCP throughput under fading and path loss conditions, allowing for the comparison and selection of optimal power control measures to enhance TCP performance by dynamically adapting transmission power based on packet error probabilities, using models that account for different fading scenarios and path loss compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is increased to counter fading and path loss, then TCP throughput is improved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power based on channel conditions (fading and path loss). The system models TCP throughput as a function of transmission power and channel state, then selects optimal power levels that maximize throughput while avoiding excessive energy consumption. This is achieved through continuous monitoring of channel quality and adaptive power control.
Solution Approach 2:
The patent implements dynamics through time-varying power control that adapts to changing channel conditions. The transmission power is not fixed but dynamically adjusted according to the current fading and path loss state. The system continuously updates its power control strategy based on real-time channel measurements and throughput modeling, enabling optimal performance in highly mobile environments.
2Reliability
If power control measures are implemented to compensate for fading, then TCP performance is improved, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the system continuously monitors TCP throughput performance and channel conditions, then uses this information to adjust power control parameters. The throughput model provides feedback on the effectiveness of current power control measures, enabling the system to learn and adapt its strategy over time without requiring complex manual configuration.
Solution Approach 2:
The system implements self-service through autonomous power control that automatically adjusts transmission power based on modeled throughput predictions. The patent uses analytical models to predict TCP throughput under different power control scenarios and automatically selects the optimal strategy without human intervention, reducing the operational complexity of managing power control in highly mobile environments.
Data Source
AI summary
A method and system for determining an optimal throughput of a communications channel in a highly mobile wireless environment, which includes selecting power control measures, determining a throughput of the communications channel for each of the selected power control measures using a throughput model of the communications channel and the selected power control measure, wherein the throughput model is based on a probability of a packet error averaged over a packet fade, and wherein the probability of the packet error averaged over the packet fade is a function of the selected power control measure, and determining the optimal throughput as a maximum one of the throughputs determined for each of the selected power control measures.