Adaptive Virtual Termination for Reverse-Link Frame Decoding
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Solution Overview
Problem
Conventional wireless communication systems cannot dynamically adjust the duration of extended decoding intervals based on aggregate reverse-link error rates, leading to suboptimal decoding performance due to fixed system parameters that do not account for varying interference levels.
Innovation Solution
A method and system that dynamically adjust the duration of extended decoding intervals in a base station by monitoring and using an aggregate reverse-link error rate to determine a virtual end time for continued decoding attempts, allowing for adaptive optimization of decoding success based on current interference conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the duration of extended decoding intervals is fixed, then system operation is simplified, but decoding performance becomes suboptimal under varying interference conditions
Solution Approach 1:
The patent applies dynamics by making the virtual termination target (decoding interval duration) adjustable rather than fixed. The base station dynamically determines the virtual termination target based on measured aggregate reverse-link error rates, allowing the decoding interval to adapt to changing channel conditions. This resolves the contradiction by enabling performance optimization through dynamic adjustment while maintaining operational simplicity through automated control.
Solution Approach 2:
The patent changes the parameter of decoding interval duration based on the aggregate reverse-link error rate. When error rates indicate poor channel conditions, the virtual termination target is extended to allow more decoding attempts. When conditions are good, the interval is reduced. This parameter adaptation directly addresses the contradiction by optimizing decoding performance according to actual channel quality without requiring complex manual configuration.
2Reliability
If the virtual termination target is extended, then decoding success probability increases, but resource consumption increases
Solution Approach 1:
The patent dynamically adjusts the virtual termination target parameter based on aggregate reverse-link error rates. Instead of always extending the decoding interval, the system only extends it when channel conditions warrant additional decoding attempts. This selective parameter adjustment increases decoding success rate when needed while avoiding unnecessary resource consumption during good channel conditions, thus resolving the contradiction between reliability and energy loss.
Solution Approach 2:
The patent implements feedback by measuring the aggregate reverse-link error rate and using this information to determine the appropriate virtual termination target. The error rate measurement provides feedback about channel conditions, allowing the system to adjust the decoding interval duration accordingly. This feedback mechanism ensures that extended decoding intervals are only used when actually beneficial, balancing decoding success rate with resource consumption.
3Adaptability or versatility
If dynamic adjustment of decoding intervals is implemented, then adaptation to interference conditions improves, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the base station to automatically determine and adjust the virtual termination target based on its own measurements of aggregate reverse-link error rates. The system serves itself by using its measured channel conditions to control its own decoding parameters without external intervention. This self-service approach improves adaptability to interference while minimizing the added complexity, as the control logic is embedded within the base station's existing measurement and control functions.
Data Source
AI summary
A method and system is disclosed for dynamic adjustment of extended frame decoding interval duration based on aggregate reverse-link error rate. In accordance with an example embodiment, upon determining that a frame transmission from an access terminal has not been successfully decoded during a nominal frame period, a base station will commence an extended decoding interval. The base station will also determine a duration for the extended decoding interval based on a measured an aggregate reverse-link error rate for transmissions from access terminals communicating with the base station. The base station will use the determined duration for the extended decoding interval. The determination will be made so as to increase the likelihood the extended decoding interval will result in a successful decoding of a frame of data.