Feedback Signalling Encoding for Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face complexity in handling acknowledgement processes, especially at high frequencies like millimeter waves, due to increased data throughputs and the need for reliable signal quality, which affects error handling and signal processing.
Innovation Solution
The method involves encoding feedback information bits into an encoded sequence of bits using polar coding and error correction techniques, optimizing the arrangement of subpatterns to enhance decoding performance and reliability, particularly by grouping subpatterns of the same type together and mapping padding bits to less reliable channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data transmissions are scheduled with one control information message to increase data throughput, then productivity is improved, but device complexity increases due to complex acknowledgement processes
Solution Approach 1:
The feedback information bit sequence is segmented into multiple sub-sequences, each corresponding to a specific transmission or codeblock. This segmentation allows the receiver to provide targeted acknowledgements for individual transmissions within the bundle, simplifying the overall acknowledgement process while maintaining high throughput by enabling selective retransmission of only failed segments.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver sends acknowledgement information back to the transmitter indicating which transmissions were successfully received and which require retransmission. This feedback loop enables efficient error handling and retransmission scheduling, resolving the complexity by providing structured, granular feedback rather than requiring complex error handling for bundled transmissions.
2Reliability
If error correction techniques are applied to ensure signal quality, then reliability is improved, but device complexity increases due to encoding and decoding processes
Solution Approach 1:
The patent applies polar coding with specific parameters optimized for feedback information transmission. By carefully selecting code parameters such as code length and information bit positioning, the system achieves reliable error correction for acknowledgement signals while managing complexity through standardized parameter sets that can be pre-configured and efficiently processed.
3Reliability
If padding bits are added to complete codeblocks for error protection, then reliability is improved, but loss of information increases due to additional overhead bits
Solution Approach 1:
The patent positions padding bits at specific locations within the feedback information bit sequence, particularly at the beginning or end depending on the coding scheme. This local placement strategy ensures that padding bits do not interfere with the interpretation of actual feedback information while still providing necessary error protection. The receiver can easily identify and disregard padding bits based on their known positions, maintaining feedback efficiency.
Data Source
AI summary
There is disclosed a method of operating a feedback radio node in a radio access network. The method includes transmitting feedback signalling representing an encoded sequence of bits, the encoded sequence of bits representing a sequence of feedback information bits, the sequence of feedback information bits comprising a plurality of subpatterns, each subpattern having a type of a set of types. The set of types has a first type and a second type, the subpatterns being ordered in the sequence according to their type. The disclosure also pertains to related devices and methods.