Multi-PDSCH Scheduling With Dual TCI State Indication
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently scheduling multiple physical downlink shared channels (PDSCHs) using multiple transmission configuration indicator (TCI) states, which can lead to suboptimal resource utilization and performance.
Innovation Solution
The method involves a user equipment (UE) receiving downlink control information (DCI) that schedules two or more downlink data channels in one or more slots, determining indications for a first and second TCI state, and receiving each channel in respective resource sets according to these states, while a base station transmits each channel in accordance with the indicated TCI states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCHs are scheduled using multiple TCI states, then resource utilization and communication performance are improved, but the complexity of scheduling and beam management increases
Solution Approach 1:
The patent segments the downlink data channels into multiple PDSCHs, each associated with a specific TCI state. The DCI message is segmented to include individual TCI state indications for each scheduled PDSCH, allowing the UE to separately identify and process each channel-TCI pair. This segmentation resolves the contradiction by making the complex multi-TCI scheduling manageable through structured division of control information.
Solution Approach 2:
The patent introduces dynamic TCI state indication mechanisms where the DCI contains flexible fields that can indicate different TCI states for different PDSCHs based on scheduling needs. The network can dynamically select and signal appropriate TCI states rather than using fixed configurations, enabling adaptive beam management that improves resource utilization while maintaining manageable complexity through on-demand signaling.
2Reliability
If multiple TCI states are indicated in DCI for multiple PDSCHs, then beam management and data transmission are optimized, but the DCI message size and processing overhead increase
Solution Approach 1:
The patent applies local quality by providing specific TCI state information only for the PDSCHs that are actually scheduled, rather than transmitting TCI information for all possible channels. Each DCI message contains TCI state indications tailored to the specific scheduling decision, reducing unnecessary control information overhead while maintaining reliable beam management for the active channels.
Solution Approach 2:
The patent creates a universal DCI structure that can handle both single-TCI and multi-TCI scheduling scenarios. The DCI format is designed with flexible fields that can indicate one or multiple TCI states depending on the scheduling requirements, allowing the same control mechanism to serve multiple functions and reducing the need for separate specialized signaling procedures.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. In certain configurations, the UE receives DCI scheduling two or more downlink data channels to be transmitted in one or more slots. The UE determines an indication, in the DCI, indicating a first TCI state and a second TCI state. The UE receives each of the two or more downlink data channels in a respective first set of resources in accordance with the first TCI state and in a respective second set of resources in accordance with the second TCI state.