Joint Encoding of CSI Reports and HARQ Feedbacks
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Solution Overview
Problem
Current wireless communication systems, such as LTE-A, face limitations in transmitting a sufficient number of Hybrid Automatic Repeat Request (HARQ) bits and Channel State Information (CSI) reports simultaneously, leading to dropped reports due to collision priorities and insufficient bandwidth in advanced applications like carrier aggregation and coordinated multipoint transmission.
Innovation Solution
A method for jointly encoding CSI reports and HARQ feedbacks using Reed-Muller codes, allowing multiple data streams to be multiplexed and encoded into a single data stream for efficient transmission, thereby increasing the number of information bits that can be transmitted at once without sacrificing coding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional separate encoding methods are used for HARQ and CSI reports, then the transmission process is simple, but the number of information bits that can be transmitted simultaneously is limited
Solution Approach 1:
The patent combines HARQ feedback and CSI report encoding into a unified joint encoding process. Multiple input streams (HARQ ACK/NACK bits and CSI reports) are merged into a single data stream that is then encoded together using Reed-Muller codes, allowing up to 33 effective information bits to be transmitted simultaneously through PUCCH format 3, overcoming the limitation of separate encoding methods.
2Adaptability or versatility
If PUCCH format 3 with 48 bits is used for HARQ transmission, then HARQ feedback can be conveyed, but the bandwidth is insufficient for advanced techniques like carrier aggregation
Solution Approach 1:
The patent merges HARQ feedback and CSI report transmissions into a single joint encoding framework. By treating both types of information as input streams to the same Reed-Muller encoder, the system can accommodate the increased number of bits required for carrier aggregation and coordinated multipoint transmission while maintaining compatibility with PUCCH format 3's 48-bit capacity.
3Quantity of substance
If multiple CSI reports are transmitted simultaneously, then channel state information coverage is improved, but collision priority causes some reports to be dropped
Solution Approach 1:
The patent combines multiple CSI reports and HARQ feedback into a single joint encoded data stream. By multiplexing all these information streams together before encoding, the system ensures that all reports are transmitted simultaneously with equal priority, eliminating the collision problems that occur when reports are handled separately with different priority levels.
Data Source
AI summary
A method of jointly encoding channel state information (CSI) reports and hybrid automatic repeat request (HARQ) feedbacks for a user equipment in a wireless communication system includes generating a first data stream based on a plurality of input streams of CSI reports or a combination of a plurality of input streams of CSI reports and HARQ feedbacks; and transmitting the first data stream to a network of the wireless communication system.