Wideband PMI MSB Encoding for Error Propagation
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Solution Overview
Problem
The existing 3GPP LTE R8 system experiences error propagation due to the wideband precoding matrix indicator PMI, necessitating an improved reporting mode to enhance system performance.
Innovation Solution
A method and device for sending and receiving precoding information, where a terminal separately encodes or jointly encodes the Most Significant Bit (MSB) of the wideband PMI with other information, improving reliability and reducing error propagation by encoding and sending the encoded information to a data sending end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wideband precoding matrix indicator PMI is reported using existing encoding methods, then the reporting is simple, but error propagation occurs and reliability deteriorates
Solution Approach 1:
The patent segments the wideband PMI into multiple parts: MSB (Most Significant Bit) and other information bits. The MSB is separately encoded and reported first, while other bits are encoded jointly or separately in subsequent reports. This segmentation reduces error propagation because the critical MSB is protected independently, improving reliability without excessively increasing overall encoding complexity.
Solution Approach 2:
The patent applies preliminary action by separately encoding and reporting the MSB of the wideband PMI before reporting other bits. This preliminary encoding of the most critical information (MSB) ensures that even if subsequent reports are lost or corrupted, the base station can still obtain the most important precoding information, thereby improving reliability while managing encoding complexity through prioritized processing.
2Reliability
If wideband precoding matrix indicator PMI is reported without separate encoding, then encoding complexity is low, but error propagation increases and reliability decreases
Solution Approach 1:
By segmenting the PMI into MSB and other bits with separate encoding schemes, the patent prevents error propagation. The MSB, which carries the most critical information, is encoded separately with appropriate redundancy, ensuring that errors in other bits do not propagate to corrupt the overall precoding information, thus reducing information loss and improving reliability.
Solution Approach 2:
The patent implements a feedback mechanism where the MSB is reported first, allowing the base station to receive critical precoding information even if subsequent reports fail. This staged feedback approach ensures that the most important information is delivered reliably, minimizing the impact of potential transmission errors and reducing overall information loss.
3Reliability
If MSB of wideband PMI is separately encoded and reported, then reliability of precoding information improves, but reporting overhead and complexity increase
Solution Approach 1:
The patent segments the PMI reporting into multiple stages: first reporting the separately encoded MSB, then reporting other bits. This segmentation allows the system to achieve improved reliability through separate encoding of critical information while managing reporting overhead by prioritizing the most important bits first, allowing potential early termination or prioritized processing.
Solution Approach 2:
By performing preliminary encoding and reporting of the MSB first, the patent establishes a reliable foundation for precoding information transmission. This preliminary action ensures that the most critical information is delivered with high reliability, and subsequent reporting of other bits can be optimized or adjusted based on channel conditions, helping to manage overall reporting overhead while maintaining reliability.
Data Source
AI summary
The present invention discloses a method and a device of sending and receiving precoding information. A terminal terminal obtains a wideband precoding matrix indicator PMI. The terminal encodes an MSB of the wideband PMI to obtain encoded information. The MSB of the wideband PMI is encoded separately or jointly with other information and the MSB is a part of the wideband PMI. The terminal sends encoded information to a data sending end.