Multi-TRP PDCCH Transmission for Blockage-Resilient 5G NR Control
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Solution Overview
Problem
In 5G New Radio (NR) technology, when a network device with multiple transmission and reception points (TRPs) experiences blocked or deep fading links with a terminal, the reliability of physical downlink control channel (PDCCH) transmission is compromised, leading to reduced communication reliability and coverage.
Innovation Solution
The network device collaboratively transmits information carried on multiple PDCCHs through different TRPs or antenna panels, utilizing orthogonal DMRS ports and different scrambling codes to enhance reliability and coverage, particularly for ultra-reliable and low latency communication (URLLC) services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information is transmitted through a single TRP or antenna panel, then the device complexity is low, but the transmission reliability deteriorates when link blockage or deep fading occurs
Solution Approach 1:
The patent divides the transmission function into multiple independent TRPs or antenna panels, where each TRP transmits information carried on different PDCCHs. This segmentation allows the system to maintain transmission reliability through diversity while keeping each individual TRP's complexity manageable
Solution Approach 2:
The patent combines transmission resources from multiple TRPs or antenna panels to jointly transmit information to the terminal. By merging multiple transmission paths, the system achieves improved reliability and coverage without requiring each individual TRP to be overly complex
2Area of stationary object
If multiple TRPs or antenna panels are used for joint transmission, then the coverage is improved, but the device complexity increases
Solution Approach 1:
The coverage area is segmented and served by multiple TRPs or antenna panels simultaneously. Each TRP provides coverage in specific directions or areas, and their combined effect extends the overall coverage while distributing the complexity across multiple simpler units
Solution Approach 2:
The patent extends transmission from a single-point approach to a multi-point spatial distribution. By utilizing multiple TRPs positioned at different locations and transmitting through different spatial dimensions, the system achieves expanded coverage while managing complexity through distributed architecture
3Reliability
If multiple PDCCHs are transmitted through different TRPs, then the transmission quality is improved, but the information processing complexity increases
Solution Approach 1:
The information transmission is segmented across multiple PDCCHs, with each PDCCH transmitted through a different TRP. This segmentation improves transmission quality through diversity while distributing processing complexity across multiple independent channels that can be handled separately
Solution Approach 2:
The terminal is designed with multi-functional capability to receive and process information from multiple PDCCHs transmitted through different TRPs. This universal processing approach allows the system to handle multiple transmission paths efficiently without proportionally increasing complexity
Data Source
AI summary
The present disclosure relates to a method for transmitting information and apparatus, which belong to the technical field of communications. The method includes: jointly sending, through at least two transmission reception points or at least two antenna panels, information carried on at least two physical downlink control channels, information carried on different PDCCHs in the at least two PDCCHs is transmitted through different TRPs or different antenna panels.