Transmission Channel Configuration Identification in UMTS
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Solution Overview
Problem
In UMTS mobile communications systems, the existing methods for evaluating transmission channel configurations require significant CPU resources, leading to inefficient power consumption and processing capacity utilization, especially in good radio conditions where not all channel configurations need to be evaluated.
Innovation Solution
The method involves pre-calculating estimated power requirements for each transmission channel configuration (TFC) and ordering them by power threshold, allowing for early identification of supported TFCs and reducing the number of comparisons needed during each radio frame, thereby minimizing CPU usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all transmission channel configurations are evaluated in every radio frame, then the UE can identify supported TFCs accurately, but CPU utilization and power consumption increase significantly
Solution Approach 1:
The patent pre-calculates and stores the power requirement for each TFC in advance, so that during radio frame evaluation, the UE only needs to compare the current power state against pre-computed values rather than performing full evaluations, significantly reducing real-time CPU usage and power consumption while maintaining evaluation accuracy
Solution Approach 2:
The patent segments the TFC evaluation process into two distinct phases: an offline pre-computation phase where power requirements are calculated and stored, and an online evaluation phase where only simple comparisons are performed. This segmentation allows complex calculations to be done when power is abundant, and simple operations to occur during power-constrained radio frame processing
2Reliability
If all transmission channel configurations are evaluated in every radio frame, then complete TFC assessment is achieved, but CPU resources are inefficiently utilized
Solution Approach 1:
The patent performs preliminary computation of TFC power requirements offline and stores them in a lookup table, transforming complex real-time calculations into simple comparisons during radio frame processing, thereby improving CPU utilization efficiency while maintaining reliable TFC selection
Solution Approach 2:
The patent creates a simplified copy of the power requirement data in the form of pre-computed lookup tables that can be quickly referenced during evaluation, avoiding the need to recalculate power requirements from scratch in each radio frame and thus improving processing efficiency
3Measurement precision
If the UE monitors all TFCs to determine supported configurations, then accurate transmission decisions are made, but processing time increases
Solution Approach 1:
The patent pre-computes power requirements for all TFCs and stores them in advance, so that during monitoring the UE only needs to perform quick comparisons against stored values rather than calculating power requirements in real-time, significantly reducing processing time while maintaining monitoring accuracy
Data Source
AI summary
A method for identifying supported transmission channel configurations in a mobile communications apparatus, the method comprising: calculating the required power value for each transmission channel configuration; and performing a sequential comparison of: an indication of an available measured power value, and an indication of the required power for each transmission channel configuration; and identifying a particular transmission channel configuration as supported if the required power for the particular transmission channel configuration is less than the available power value; wherein: the sequential comparison is performed in order of magnitude of value of the indication of the required power; and the method further comprising stopping said comparison when a supported transmission channel configuration is identified.