Multi-TRP Signal Mapping for Lower PDCCH Processing Complexity
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively utilizing multi-Transmission/Reception Point (TRP) transmission, particularly in next-generation 5G New Radio (NR) networks, which affect data rate, latency, reliability, and mobility.
Innovation Solution
A method and apparatus for multi-TRP transmission involving a User Equipment (UE) that receives TRP information from a Base Station (BS), enabling communication with multiple TRPs by identifying correspondences between TRPs and Downlink (DL) Reference Signal resources, using TRP Identifiers, Control Resource Set IDs, or TRP mapping tables, and performing rate matching, preemption, and beam management to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-TRP transmission is adopted in 5G NR networks, then data throughput and beamforming gain are improved, but device complexity and system configuration complexity increase
Solution Approach 1:
The patent segments the TRP identification into multiple independent mechanisms: TRP IDs for direct identification, CORESET IDs for control resource association, and DL RS resource indices for reference signal mapping. This segmentation allows the system to use the most appropriate mechanism for each specific scenario, reducing overall complexity while maintaining high data throughput through multi-TRP transmission
Solution Approach 2:
The patent creates a universal TRP information structure that can serve multiple functions simultaneously. The same TRP information framework supports TRP identification, rate matching configuration, preemption indication, and beam management across different transmission scenarios. This multi-functionality reduces the need for separate configuration systems for each function, thereby reducing overall system complexity while enabling high data throughput
2Reliability
If multi-TRP transmission is implemented, then coverage and reliability are improved, but the number of PDCCH candidates and CCEs for blind decoding and channel estimation increases
Solution Approach 1:
The patent performs preliminary action by configuring TRP information, rate match patterns, and preemption indicators in advance through RRC signaling and MAC CE. This preliminary configuration allows the UE to prepare reception parameters before actual data transmission, enabling reliable multi-TRP communication without requiring complex real-time processing of multiple PDCCH candidates from different TRPs
Solution Approach 2:
The patent introduces TRP information as an intermediary structure that mediates between multiple TRPs and the UE. This intermediary contains mapped relationships between TRP IDs, CORESET IDs, and DL RS resource indices, allowing the UE to efficiently identify and process transmissions from multiple TRPs without directly managing the complexity of blind decoding across all possible PDCCH candidates
3Measurement precision
If TRP information mapping is configured, then rate matching and preemption accuracy are improved, but information overhead increases
Solution Approach 1:
The patent applies local quality by providing specific TRP information only where needed. Instead of uniformly configuring all TRP parameters across all transmissions, the system selectively provides TRP IDs, CORESET IDs, and rate match patterns based on the specific transmission scenario and TRP configuration. This localized information provision maintains high rate matching accuracy while minimizing unnecessary control overhead
Solution Approach 2:
The patent uses parameter changes by dynamically adjusting the level of TRP information detail based on transmission conditions. The system can switch between different TRP information configurations (e.g., full TRP mapping tables vs. simplified TRP ID indications) depending on the number of active TRPs, channel conditions, and traffic requirements, thereby maintaining precision while adapting information overhead to actual needs
Data Source
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AI summary
A method performed by a User Equipment (UE) is provided. The method includes receiving Transmission/Reception Point (TRP) information from a Base Station (BS), and communicating with a plurality of TRPs based on the TRP information, where the TRP information identifies a correspondence between the plurality of TRPs and a plurality of Downlink (DL) Reference Signal (RS) resources, and where the TRP information includes at least one of a plurality of TRP Identifiers (IDs), a plurality of Control Resource Set (CORESET) IDs, or a TRP mapping table including a plurality of TRP indices and a plurality of DL RS resource indices.