Uplink Control Information Coding for Multi-Cell PUSCH Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink control information, particularly in multi-node systems with multiple downlink cells, where accurate channel state reporting and scheduling are challenging due to increased data throughput and complex communication environments.
Innovation Solution
A method for transmitting uplink control information using a physical uplink shared channel (PUSCH) in a wireless communication system, where a terminal receives and codes downlink control information from multiple downlink cells and transmits the coded information using the PUSCH, allowing for efficient channel state reporting and scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink cells are configured for a terminal in a multi-node system, then data throughput is increased, but uplink control information transmission becomes inefficient and scheduling becomes complex
Solution Approach 1:
The patent segments uplink control information into different types (ACK/NACK for downlink data reception, CSI for channel quality, SR for scheduling requests) and processes them through separate coding paths. This segmentation allows efficient handling of multiple downlink cells by treating different control information types independently, resolving the complexity issue while maintaining high throughput benefits
Solution Approach 2:
The patent creates a universal uplink control information transmission framework that handles multiple downlink cells through a unified PUSCH resource allocation mechanism. The same PUSCH resources can carry control information for any number of downlink cells, providing multi-functionality that scales with system complexity without proportionally increasing transmission overhead
2Measurement precision
If downlink control information is transmitted from multiple downlink cells, then channel state reporting capability is improved, but interference increases
Solution Approach 1:
The patent merges channel state information from multiple downlink cells into a single uplink control information message transmitted via PUSCH. By combining CSI reports for multiple cells in one transmission, the system achieves comprehensive channel state monitoring while avoiding the interference that would result from separate transmissions on multiple channels
Solution Approach 2:
The patent converts the potential harmful effect of multiple control transmissions (which would cause interference) into a benefit by multiplexing all control information on a single PUSCH channel. The interference that would arise from multiple separate transmissions is transformed into efficient resource utilization through unified transmission
3Reliability
If uplink control information is transmitted using traditional methods in multi-node systems, then reliability is maintained, but power consumption increases
Solution Approach 1:
The patent extracts uplink control information from traditional separate control channels and consolidates it into PUSCH transmissions. This extraction eliminates redundant transmission mechanisms while maintaining reliability through the same error protection and acknowledgment protocols, thereby reducing terminal power consumption
Data Source
AI summary
A method for transmitting uplink control information and an apparatus therefor are disclosed. In a method for transmitting uplink control information using a physical uplink shared channel (PUSCH) in a wireless communication system, the method is performed by a terminal and includes receiving downlink control information including an accumulated number of physical downlink shared channels (PDSCH) transmissions associated with a cell group configured for the terminal, coding the uplink control information using the accumulated number of PDSCH transmissions, and transmitting the coded uplink control information using the PUSCH.