Uplink Feedback Recovery Using Historical State Information
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Solution Overview
Problem
In wireless communication systems, the decoding performance at the base station is degraded when feedback information from the user equipment fails to be transmitted due to poor instantaneous channel quality, leading to inconsistencies in state information and communication performance loss.
Innovation Solution
An information exchange method where the user equipment uses historical state information to generate feedback information, ensuring consistency with the base station's state information by rolling back to previous stored information when transmission fails, thereby improving decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feedback information is transmitted continuously to maintain real-time channel updates, then channel prediction accuracy is improved, but transmission reliability deteriorates when channel quality is poor
Solution Approach 1:
The base station pre-stores historical state information from the encoder in a buffer before transmission failures occur. This preliminary storage ensures that when feedback transmission fails, the base station can immediately retrieve and use the most recent stored state information to maintain decoder synchronization without waiting for retransmission or recovery
Solution Approach 2:
The system implements a feedback mechanism where the base station monitors feedback transmission success and triggers state information retrieval from the buffer when transmission failures are detected. This feedback loop ensures that the decoder receives updated state information only when necessary, maintaining synchronization while reducing unnecessary transmissions during poor channel conditions
2Measurement precision
If the base station continuously updates state information based on received feedback, then decoding accuracy is improved, but system complexity increases due to synchronization management
Solution Approach 1:
The base station creates a copy of the encoder's state information by storing it in a buffer. This copying mechanism allows the base station to maintain an identical copy of the state information without complex synchronization protocols, as the buffer automatically receives and stores the state information output from the encoder at each time step
Solution Approach 2:
The buffer automatically manages state information storage and retrieval based on transmission success indicators, eliminating the need for complex external synchronization management. The system self-regulates by retrieving stored state information when transmission failures occur, without requiring additional coordination between encoder and decoder
3Productivity
If historical state information is stored and reused, then communication performance loss is reduced, but memory requirements increase
Solution Approach 1:
The system dynamically adjusts the amount of historical state information stored in the buffer based on channel conditions and transmission success rates. When channel conditions are good and transmissions are successful, the buffer size can be reduced. When transmission failures occur, the buffer automatically retains and retrieves the necessary state information, optimizing memory usage based on actual performance needs
Data Source
AI summary
This application relates to the mobile communication field, and may be applied to a protocol framework such as LTE, NR, or 6G, and in particular, relates to an information exchange method, an apparatus, and a readable storage medium. The method includes: When uplink feedback information fails to be transmitted, a base station sends first information to UE, to determine historical state information of the UE. The UE inputs the historical state information determined based on the first information and channel information that is currently measured or predicted into an encoder for processing, to obtain feedback information, and sends the feedback information to the base station.