Wireless Station Parallel Data Stream Rate Adaptation
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Solution Overview
Problem
Wireless networks face challenges in determining optimal transmission rates for parallel data streams, balancing throughput and power consumption while ensuring reliable packet transmission across varying quality of service requirements.
Innovation Solution
A wireless station maintains transmission profiles for each data stream, determining transmission rates based on specific rules and parameters, including initial rates, fallback conditions, and rate adaptation mechanisms, to manage packet transmission effectively across multiple parallel data streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a higher transmission rate is used, then transmission throughput is improved, but error susceptibility increases
Solution Approach 1:
The patent implements dynamic transmission rate selection by maintaining multiple transmission profiles (first profile for higher rates, second profile for lower rates) and switching between them based on real-time packet error rate monitoring. The system dynamically adjusts the transmission rate for subsequent packets in a data stream based on whether previous packets were transmitted successfully, thereby resolving the contradiction between throughput and reliability.
2Reliability
If a lower transmission rate is used, then error susceptibility is reduced, but power consumption increases
Solution Approach 1:
The system dynamically selects transmission rates by monitoring packet transmission success and switching between first and second transmission profiles based on error rates. This dynamic adjustment ensures that the lowest possible power consumption is achieved while maintaining acceptable reliability, avoiding unnecessary use of lower power profiles when higher rates succeed.
3Loss of time
If transmission rate is increased for better throughput, then transmission time is reduced, but reliability deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the transmission success or failure of each packet is monitored and used to determine the transmission rate for subsequent packets. The system receives feedback on whether packets were transmitted successfully and adjusts the transmission profile accordingly, creating a closed-loop control system that balances transmission time and reliability based on real-time channel conditions.
4Adaptability or versatility
If different transmission rates are used for parallel data streams, then quality of service requirements are met, but system complexity increases
Solution Approach 1:
The patent segments the transmission system by maintaining separate transmission profiles for different data streams, allowing each stream to be independently configured with appropriate transmission rates and error correction parameters. This segmentation enables tailored QoS optimization for each data stream while managing overall system complexity through structured profile management.
Data Source
AI summary
A wireless station (STA) of a wireless network transmits parallel data streams. The STA maintains transmission profiles, each corresponding to a respective data stream of parallel data streams. A transmission profile contains a set of rules or parameters, which are used for determining various characteristics in relation to transmission of packets in the corresponding data stream. The STA queues packets of each data stream in a corresponding queue. The STA selects a packet from a queue, and determines a transmission rate for the selected packet according to a transmission profile of the queue. The STA transmits the packet at the determined transmission rate. In an embodiment, the wireless network corresponds to an IEEE 802.11 network.