Uplink Subband Precoding Resource Allocation Method
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Solution Overview
Problem
Current wireless communication systems, particularly in the 5G context, face challenges with wideband precoding accuracy and efficiency, necessitating the support for subband precoding in uplink transmissions to enhance transmission efficiency and accuracy.
Innovation Solution
The proposed method involves generating and transmitting Downlink Control Information (DCI) that includes uplink precoding information for specific subband resources, allowing for efficient allocation and application of subband-specific precoding information to allocated resources, thereby reducing the payload burden on the control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wideband precoding is used through single precoding information notification, then the control channel payload is kept limited, but the precoding accuracy deteriorates
Solution Approach 1:
The patent divides the uplink bandwidth into multiple subbands and applies different precoding information to each subband. This segmentation allows subband-specific precoding to improve accuracy while managing control payload through selective notification mechanisms
Solution Approach 2:
The patent enables different precoding information to be applied to different subbands based on local channel conditions. This local quality approach allows precise precoding where needed while maintaining manageable control overhead through selective notification
2Measurement precision
If subband-specific uplink precoding information is transmitted, then the precoding accuracy is improved, but the control channel capacity is exceeded
Solution Approach 1:
The patent transmits only the necessary subband-specific precoding information rather than all possible subbands. This partial action approach improves precoding accuracy for allocated resources while keeping control channel payload within acceptable limits
Solution Approach 2:
The patent changes the granularity of precoding information from wideband to subband level, and dynamically adjusts which subbands receive specific precoding notifications based on resource allocation, thereby improving accuracy while managing control complexity
Data Source
AI summary
The present disclosure relates to a communication technique that fuses a 5G communication system for supporting a higher data transmission rate than a 4G system with IoT technology, and a system therefor. The present disclosure may be applied to an intelligent service (for example, smart home, a smart building, a smart city, a smart car or connected car, health care, digital education retail, a security and safety related service, etc.) on the basis of 5G communication technology and IoT related technology. The present invention provides a resource allocation and PRB bundling method suitable for uplink sub-band precoding such that the uplink sub-band precoding is efficiently performed without a large increase in an uplink related downlink control information payload.