Access Terminal Data Rate Request Mode Switching
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Solution Overview
Problem
Access terminals experiencing poor RF conditions often struggle to decode data, leading to increased noise and interference, which existing methods fail to effectively mitigate by preventing data transmission from other terminals or the network, unless conditions are unlikely to improve within a given time.
Innovation Solution
Implementing a method at access terminals and networks that transitions between reverse traffic channel modes based on average data rate requests, using a timer and thresholds to determine when to prevent reverse-link data transmission, allowing forward-link data to continue or cease based on application types and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If access terminals prevent reverse-link data transmission when experiencing poor RF conditions, then noise and interference are reduced, but communication productivity decreases
Solution Approach 1:
The system dynamically adjusts the reverse traffic channel mode based on real-time RF conditions and decoded data quality. Access terminals transition between first mode (allowing reverse-link data transmission) and second mode (preventing reverse-link data transmission) based on whether poor RF conditions are temporary or persistent, as determined by monitoring decoded data over a plurality of data packets and comparing against thresholds.
Solution Approach 2:
The system uses feedback from decoded data quality monitoring to control reverse-link data transmission. The access terminal monitors whether it can successfully decode forward-link data packets, and this decoded data quality feedback determines whether to allow or prevent reverse-link data transmission, creating a closed-loop control system that adapts to changing RF conditions.
2Productivity
If access terminals allow continuous reverse-link data transmission, then communication productivity is maintained, but noise and interference increase when RF conditions are poor
Solution Approach 1:
The system dynamically switches between transmission modes based on real-time monitoring of decoded data quality. When RF conditions deteriorate and decoding fails exceed a threshold, the system transitions to prevent reverse-link data transmission, thereby reducing noise and interference while maintaining productivity when conditions are good.
Solution Approach 2:
The access terminal continuously monitors the quality of decoded forward-link data packets and uses this feedback to control whether reverse-link data transmission is allowed. This feedback mechanism ensures that reverse-link transmission is prevented only when necessary, maintaining productivity during normal operation while reducing interference during poor RF conditions.
3Object-affected harmful factors
If access terminals transition to null data rate request state immediately upon detecting poor RF conditions, then noise and interference are reduced quickly, but communication reliability decreases due to premature mode switching
Solution Approach 1:
The system performs preliminary monitoring of decoded data quality over a plurality of data packets before transitioning to the second mode. By evaluating whether the number of successfully decoded packets falls below a threshold over multiple observations, the system avoids premature mode switching and ensures that transitions occur only when poor RF conditions are persistent, thereby maintaining reliability while still reducing interference when necessary.
Solution Approach 2:
The system uses continuous feedback from monitoring decoded data quality across multiple data packets to determine when to transition modes. This feedback-based approach with a threshold comparison over a plurality of packets ensures that mode transitions occur only when poor RF conditions are sustained, preventing premature switching while still enabling timely transitions when conditions genuinely deteriorate.
Data Source
AI summary
A method and system for monitoring data rate requests (DRRs) transmitted from an access terminal (AT) to an access network (AN). Each DRR includes a parameter indicating whether it is a null or non-null DRR. Upon the AT transitioning to a null-DRR state, the AT and AN determine an average parameter of a given number of DRRs and compare the average to a threshold. The AT selects a time duration based on the average and starts a timer. When the timer counts to the selected duration, the AT transitions from a mode in which the AT transmits data channel traffic and other traffic to a mode in which the AT prevents transmission of data channel traffic but allows transmission of other traffic. The AN compares the average to another threshold and determines whether it should transmit forward-link traffic channel data to the AT at a null or non-null data rate.