Receiver TFCI Detection Power Reduction via Frame Combining
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Solution Overview
Problem
Conventional wireless communication systems in UMTS protocols require higher power to reliably detect Transfer Format Combination Indicator (TFCI) bits frame-by-frame, leading to increased power consumption without error checks across consecutive radio frames, resulting in inefficient transport channel processing.
Innovation Solution
Implementing a method to combine TFCI information from multiple radio frames within a transmission time interval (TTI) to improve signal-to-noise ratio and detect format errors early, allowing for selective processing and reduced power consumption by terminating transport channel processing when format inconsistencies are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TFCI bits are detected frame-by-frame without error checks, then detection is performed individually, but power consumption increases and detection reliability decreases
Solution Approach 1:
The patent combines TFCI detection across multiple radio frames by accumulating soft decisions from several frames and performing a single CRC check at the end of the TTI. This merging approach improves detection reliability through diversity gain while reducing power consumption by eliminating redundant individual frame processing and CRC checks.
Solution Approach 2:
The patent performs preliminary soft decision accumulation during the TTI without immediate CRC verification, deferring the validation step until the end. This allows the system to gather sufficient signal energy across multiple frames before committing to a detection decision, improving reliability while avoiding premature processing of potentially erroneous individual frame detections.
2Reliability
If transport channel processing is performed for every radio frame, then complete processing is ensured, but power consumption increases due to unnecessary processing
Solution Approach 1:
The patent performs preliminary accumulation of TFCI soft decisions from multiple radio frames before initiating full transport channel processing. By deferring the processing decision until accumulation is complete, the system ensures processing completeness only when necessary, eliminating redundant processing of individual frames while maintaining reliability.
Solution Approach 2:
The patent implements a feedback mechanism where the accumulated TFCI detection result and CRC check outcome determine whether full transport channel processing should proceed. This feedback control ensures that processing is performed only when the detection confidence is sufficient, reducing unnecessary power consumption while maintaining processing completeness when needed.
Data Source
AI summary
In a method for power reduction at a receiver, a first radio frame is processed to recover transmitted data based on transport format information. The transport format information is determined based on a combination of transport format information associated with a plurality of received radio frames rather than a single frame. In another method for power reduction at a receiver, whether transport format information associated with a first radio frame is different from transport format information associated with a second radio frame is determined. The transport channel data is then processed based on the determination. The first radio frame is received prior to the second radio frame, and the transport format information indicates a transport format for transport channel data received in the first and second radio frames.