DM-RS Transmission Configuration for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in reliably transmitting and receiving Demodulation Reference Signals (DM-RS) using multiple Transmission Reception Points (TRPs), which affects data transmission rates and latency.
Innovation Solution
A method for configuring the transmission and reception of DM-RS by User Equipment (UE) supported by multiple TRPs, involving the use of a DMRS table, activation information, feedback information, and downlink control information to improve reliability and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are used for DM-RS transmission, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the DM-RS transmission into multiple independent TRPs, where each TRP transmits DM-RS on specific antenna ports. This segmentation allows the system to achieve diversity gain and improved reliability through multiple transmission paths while managing complexity by dividing the overall transmission task into manageable segments handled by separate TRPs.
Solution Approach 2:
The patent introduces spatial dimensionality by utilizing multiple TRPs located at different geographical positions to transmit DM-RS. This dimensional expansion from single-point to multi-point transmission provides spatial diversity, improving reliability without proportionally increasing system complexity through intelligent resource allocation.
2Productivity
If multiple TRPs are used for DM-RS transmission, then data transmission rate is improved, but loss of time increases
Solution Approach 1:
The patent employs preliminary action by pre-configuring TCI states and antenna port associations before actual DM-RS transmission. The UE is预先 provided with mapping relationships between TCI states and antenna ports, allowing rapid determination of receiving parameters without time-consuming calculations during transmission, thus improving data rate while minimizing time loss.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports received signal quality and configuration acknowledgments to the network. This feedback enables dynamic optimization of multi-TRP transmission parameters, allowing the system to achieve higher data transmission rates through adaptive resource allocation while maintaining efficient time utilization.
3Reliability
If multiple TRPs are used for DM-RS transmission, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by activating only the necessary number of TRPs and antenna ports based on current channel conditions and service requirements. Instead of continuously utilizing all available TRPs, the system dynamically selects and activates a subset, achieving improved reliability through selective multi-TRP transmission while significantly reducing energy consumption compared to full-utilization approaches.
Data Source
AI summary
A method for receiving a DM-RS by a user equipment (UE) in a wireless communication system is disclosed, compises receiving activation information; transmitting feedback information on the activation information; receiving downlink control information (DCI) including i) a transmission configuration indication (TCI) field and ii) an antenna port field; and receiving the DM-RS based on the DCI, wherein the activation information includes information related to mapping of a code point of the TCI field and a TCI state, wherein based on the TCI field indicating a code point mapped with a plurality of TCI states, and the antenna port field indicating antenna ports of a plurality of code division multiplexing (CDM) groups, a first TCI state among the plurality of TCI states corresponds to a CDM group associated with a first antenna port based on an instruction order of the antenna ports.