Filtering Closed Loop Correction Power for Data Rate Accuracy
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Solution Overview
Problem
In communication systems, particularly CDMA networks, mobile devices often request a lower data rate than they are capable of achieving based on power and traffic conditions due to conventional methods of determining data rates using instantaneous closed loop correction values, leading to poor performance.
Innovation Solution
The method involves filtering closed loop correction power values using moving average or IIR filters to provide a more accurate data rate calculation, which is then sent in supplemental channel request messages to the base station, ensuring a better correlation with actual network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional periodic rate determination (every 1-5 seconds) is used, then device complexity is reduced, but data rate accuracy deteriorates causing poor performance
Solution Approach 1:
The patent introduces filtered closed loop correction values as an intermediary between raw power measurements and data rate determination. The filtering process smooths out short-term fluctuations and provides more stable, accurate rate decisions without requiring complex real-time analysis
Solution Approach 2:
The patent performs preliminary filtering of closed loop correction values before using them for data rate determination. By pre-processing the power measurements to remove noise and fluctuations, the system achieves better accuracy without increasing the complexity of the decision-making process
2Reliability
If instantaneous closed loop correction values are used, then response speed is improved, but reliability deteriorates due to power fluctuations
Solution Approach 1:
The patent applies filtering to cushion against power fluctuations before they affect data rate determination. By smoothing the closed loop correction values in advance, the system protects against unreliable instantaneous measurements while maintaining reasonable response times
Solution Approach 2:
The patent uses filtered closed loop correction values as feedback to continuously adjust data rate decisions. This feedback mechanism ensures that rate determinations are based on stabilized, reliable power measurements rather than noisy instantaneous values
Data Source
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AI summary
A method and system for obtaining reverse channel resources for a mobile device, the method filtering a closed loop correction power value; calculating a data rate utilizing the filtered closed loop correction power value; and sending a supplemental channel request message, including the calculated data rate, to a base station transceiver system.