DCI TCI-State Indication for Accurate Multi-TRP PDSCH Reception
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Solution Overview
Problem
The challenge in existing mobile communication systems is determining the presence of a new indication field in downlink control information (DCI) for TCI states, which affects the accuracy of data transmission, particularly in high-frequency channels where beam-based communication is used.
Innovation Solution
A method and apparatus are introduced to determine the presence of a first information field in DCI for using M TCI states, including joint, downlink, and uplink TCI states, through first indication information, ensuring accurate decoding and reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new indication field is added to DCI for indicating M TCI states, then the adaptability of beam management is improved, but the device complexity increases
Solution Approach 1:
The patent embeds the first indication information within the existing DCI structure rather than creating a separate signaling mechanism. The indication field is nested inside the DCI format, allowing the DCI to carry both traditional scheduling information and the new TCI state indication functionality, thereby reducing overall system complexity while maintaining adaptability.
Solution Approach 2:
The DCI structure is designed to serve multiple functions: it continues to provide traditional downlink scheduling information while simultaneously indicating M TCI states for multi-TRP reception. This multi-functionality eliminates the need for separate signaling mechanisms, reducing device complexity while enhancing beam management adaptability.
2Measurement precision
If the terminal must determine the presence of the first information field in DCI, then the measurement precision of DCI decoding is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The terminal is pre-configured with knowledge of the first indication information's location and format through higher-layer signaling (RRC configuration). This preliminary action allows the terminal to efficiently locate and decode the indication field without performing complex search operations, thereby maintaining high decoding accuracy while reducing detection difficulty.
Solution Approach 2:
The patent introduces a standardized indication field format that acts as an intermediary between the network's beam management intentions and the terminal's decoding process. This standardized format simplifies the detection process by providing a predictable, easily identifiable structure that the terminal can reliably detect and decode with high precision.
Data Source
AI summary
An information indication method is performed by a terminal. The method includes: receiving first indication information sent by a network device, and determining whether first downlink control information (DCI) includes a first information field according to the first indication information, wherein the first information field is used for instructing the terminal to use M TCI states for receiving a physical downlink shared channel (PDSCH), the TCI states include at least one of a joint TCI state, a downlink TCI state, or an uplink TCI state, and M is a positive integer.