Encoder Selection for Channel State Information Feedback
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Solution Overview
Problem
The increasing demand for higher data rates and efficient communication in wireless communication systems, particularly in 5G and beyond, is challenged by the limited resources available to base stations, necessitating a method to efficiently transmit and receive data and control information using limited radio resources, while also addressing latency and reliability concerns.
Innovation Solution
A method involving the determination of appropriate encoders and decoders based on feedback bits to efficiently encode and decode channel state information (CSI), allowing for the transmission of B-bit encoded CSI, where B=S×Q, and using neural networks for robust encoding and decoding, ensuring effective communication in high-density node and user equipment scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs and data volume increase in wireless communication systems, then communication capacity and data throughput are improved, but the limited radio resources available to base stations become insufficient, leading to increased system complexity and resource constraints
Solution Approach 1:
The patent segments the CSI feedback process by dividing it into multiple stages: determining encoder based on feedback bits, encoding CSI through the selected encoder, determining B-bit encoded CSI, and transmitting the encoded information. This segmentation allows efficient resource utilization while maintaining high data throughput
Solution Approach 2:
The patent implements dynamic encoder selection where the transmitting device determines an appropriate encoder with S outputs based on the number of feedback bits B (where B=S×Q). This dynamic adaptation enables the system to optimize performance according to available feedback capacity, resolving the contradiction between throughput and complexity
2Measurement precision
If more feedback bits are used for CSI transmission, then encoding precision and communication reliability are improved, but the feedback overhead and resource consumption increase
Solution Approach 1:
The patent changes the parameter of feedback bits B (where B=S×Q) to optimize the balance between encoding precision and feedback overhead. By adjusting the number of feedback bits based on channel conditions and service requirements, the system achieves high precision when needed while minimizing overhead in other scenarios
Solution Approach 2:
The patent applies partial action by transmitting only the necessary B-bit encoded CSI information required for the current communication conditions, rather than always transmitting maximum precision data. This selective transmission reduces feedback overhead while maintaining sufficient encoding precision
Data Source
AI summary
A transmission device in a wireless communication system: determines an encoder having S outputs from among encoders supported by the transmission device, on the basis of the number B of feedback bits, wherein B=S×Q; encodes CSI through the encoder to output S real number values; determines B-bit encoded CSI including Q bits indicating the S real number values, respectively; and transmits the B-bit encoded CSI. The encoders may have different numbers of outputs from each other, and the different numbers of outputs may be predetermined for different feedback bit number ranges.