Uplink Shared Channel Control Detection With Top-M Decoding
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Solution Overview
Problem
Existing wireless networks face challenges in efficiently detecting control information over a physical uplink shared channel (PUSCH) without compromising resource allocation for data transmission, leading to suboptimal network performance due to errors in Channel Quality Indicator (CQI) and Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) detection.
Innovation Solution
A two-stage processing architecture is employed for control channel detection, involving a preliminary Top-M survival information bit decoder and a joint ACK/CQI/RI detector using maximum-likelihood based metric search to enhance the detection of control bits, including generating soft-combined bit streams, decoding, and calculating metrics to form a search space for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more resources are allocated to control information, then control information decoding performance is improved, but resources available for uplink data transmission are reduced
Solution Approach 1:
The patent segments the control information decoding process into two distinct stages: a preliminary decoding stage that generates candidate solutions, and a final detection stage that selects the optimal solution. This segmentation allows efficient use of processing resources while maintaining high decoding accuracy, thereby resolving the contradiction between decoding performance and resource allocation for data transmission.
Solution Approach 2:
The preliminary decoding stage performs initial processing to generate candidate control information sequences before final detection. This preliminary action reduces the complexity of the final detection stage, enabling high decoding performance without requiring excessive resources that would otherwise be unavailable for uplink data transmission.
2Measurement precision
If advanced decoding is used to increase control bit decoding performance, then detection accuracy is improved, but complexity and latency are introduced
Solution Approach 1:
The decoding process is divided into a preliminary stage using simplified decoding methods and a final stage using more advanced detection algorithms. This segmentation enables the system to achieve high decoding accuracy while controlling complexity and latency by applying computational intensity only where necessary in the final stage.
Solution Approach 2:
The patent applies advanced decoding techniques partially - only in the final detection stage for candidate selection - rather than throughout the entire decoding process. This partial application of advanced methods achieves the necessary decoding performance while minimizing the introduction of complexity and latency.
Data Source
AI summary
Methods and apparatus for channel detection in an uplink shared control channel. In an exemplary embodiment, a method includes generating soft-combined bit streams for an acknowledgement (ACK) indicator, rank indicator (RI), and channel quality indicator (CQI) received in an uplink shared channel. The method also includes decoding the ACK, RI, and CQI soft-combined bit streams to generate Top-M decoded bit streams for each indicator, and generating Top-Q symbols for each indicator from the Top-M decoded bit streams for each indicator. The method also includes calculating metrics from the Top-Q symbols and uplink control information (UCI) symbols extracted from the uplink shared channel, combining the metrics to form a search space, and searching the search space to determine transmitted ACK, RI, and CQI bits.