PUCCH Repetition Across Multiple TRPs for Reliable Uplink Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring reliable uplink control information transmission to multiple transmission points or beams, particularly in environments with complex network topologies and varying signal conditions, which can lead to reduced network coordination and increased error rates.
Innovation Solution
A method and device for a terminal to perform repeated uplink transmission of control information, utilizing physical uplink control channel (PUCCH) repetition configuration information that includes spatial relation information, such as identifiers for reference signals like synchronization signal blocks (SSBs), channel state information reference signals (CSI-RS), or sounding reference signals (SRS), to enhance reliability and coordination across multiple transmission points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated transmission is performed to multiple transmission points, then reliability of uplink control information delivery is improved, but device complexity increases
Solution Approach 1:
The transmission apparatus segments the uplink control information transmission by dividing it into multiple transmission instances directed at different transmission points. Each transmission point receives a portion of the control information, allowing the system to achieve redundancy and improved reliability without requiring a single complex transmission mechanism.
Solution Approach 2:
The patent introduces a spatial dimension to the transmission process by directing repeated transmissions to multiple transmission points simultaneously. This dimensional approach adds redundancy across different spatial locations, improving reliability without significantly increasing the complexity of individual transmission operations.
2Reliability
If repeated transmission is performed to multiple transmission points, then network coordination is improved, but loss of time increases
Solution Approach 1:
The transmission apparatus employs periodic repeated transmissions to multiple transmission points, where each transmission point receives control information at regular intervals. This periodic action allows for coordinated communication across multiple points while managing transmission time through structured repetition rather than continuous transmission.
Solution Approach 2:
The system performs preliminary configuration of transmission parameters and spatial relations before actual transmission occurs. By pre-configuring the repeated transmission structure and spatial relationships, the system reduces the time required for coordination during actual data transmission.
3Reliability
If spatial relation information is configured for repeated transmission, then reliability is improved, but device complexity increases
Solution Approach 1:
The spatial relation information configuration serves multiple functions: it defines the spatial relationship between transmission points, enables proper beamforming, and facilitates coordinated transmission. By making this configuration multi-functional, the system improves reliability without proportionally increasing configuration complexity.
Solution Approach 2:
The patent utilizes parameter changes in the spatial relation information to adapt the transmission characteristics. By adjusting parameters such as spatial relations and beam directions based on configuration information, the system optimizes reliability for different transmission scenarios without requiring complex hardware modifications.
Data Source
AI summary
Disclosed are a communication technique and a system thereof for fusing a 5G communication system with IoT technology for supporting a higher data transmission than that of a 4G system. The present disclosure may be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security, and safety related services, etc.) on the basis of 5G communication technology and IoT-related technology. The invention of the present disclosure provides an uplink transmission method and apparatus for a plurality of TRPs.