Multi-Cell DCI Scheduling With TCI State Mapping in Wireless UEs
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively scheduling multiple serving cells using one downlink control information (DCI) due to issues with interpreting and determining valid transmission configuration indication (TCI) states, handling deleted TCI states, and managing demodulation reference signals (DMRS) for multiple serving cells.
Innovation Solution
A method and device for a UE to receive and process transmission configuration indication (TCI) states, mapping code points, and downlink control information (DCI) to manage communication with multiple serving cells, including determining valid TCI states and handling deleted states, using a processor and transceiver to perform operations based on received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one DCI is used to schedule multiple serving cells, then scheduling efficiency and resource allocation are improved, but complexity in interpreting and determining valid TCI states increases
Solution Approach 1:
The patent segments the TCI state information by introducing cell-specific TCI state indicators within the DCI. Each served cell is associated with specific TCI states, allowing the UE to separately determine and interpret TCI states for each cell rather than treating them as a single unified set. This segmentation reduces interpretation complexity while maintaining multi-cell scheduling efficiency.
Solution Approach 2:
The patent applies preliminary action by pre-configuring TCI state mappings and code point associations before actual scheduling occurs. The network pre-establishes the relationship between code points and TCI states for each cell, so that when DCI is received, the UE can directly map the received code point to the appropriate TCI state without complex real-time determination, thereby reducing processing complexity.
2Adaptability or versatility
If multiple TCI states are indicated in DCI for multi-cell scheduling, then adaptability and configuration flexibility are improved, but difficulty in determining valid TCI states and handling deleted states increases
Solution Approach 1:
The patent applies local quality by making TCI state validity and applicability cell-specific rather than global. Each cell has its own set of valid TCI states, and the DCI indicates which cell-specific TCI states are applicable to which served cells. This allows the system to maintain high configuration flexibility across multiple cells while reducing the difficulty of determining valid TCI states by localizing the validation process to each individual cell.
Solution Approach 2:
The patent introduces cell-specific TCI state indicators as intermediaries between the general DCI scheduling information and the specific TCI state configurations. These intermediaries facilitate the mapping process by providing a clear indication of which TCI states are valid for which cells, thereby reducing the difficulty of detecting and measuring valid TCI states while preserving configuration flexibility.
3Adaptability or versatility
If code point mapping is configured for multi-cell scheduling, then scheduling versatility is improved, but device complexity in managing DMRS and TCI state mappings increases
Solution Approach 1:
The patent applies universality by creating a unified code point mapping mechanism that serves multiple functions simultaneously. The same code point mapping structure is used across all served cells, allowing a single DCI to schedule multiple cells with different TCI states. This universal approach increases scheduling versatility while reducing device complexity by avoiding the need for separate mapping mechanisms for each cell.
Data Source
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AI summary
The objective of the present disclosure is to use one piece of downlink control information (DCI) in order to schedule a plurality of serving cells in a wireless communication system. This method performed by means of a terminal may comprise the steps of: receiving first information for setting at least one transmission configuration indication (TCI) state for each cell; receiving second information related to the mapping of a TCI state to a first type code point for single cell scheduling; receiving third information related to the mapping of first type code points to a second type code point for multiple cell scheduling; receiving DCI for the multiple cell scheduling; and communicating with at least one from among a plurality of cells on the basis of the DCI.