Single DCI Scheduling for Multiple TCI States in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, transmitting multiple transmission configuration indicator (TCI) states in multiple transmission time intervals (TTIs) using separate downlink control information (DCI) is inefficient, leading to increased control communication overhead and monitoring overhead for user equipment (UE) and the wireless communication system.
Innovation Solution
The method involves using single downlink control information (DCI) to indicate resources for multiple TCI states across multiple TTIs, where common and specific resource assignments are shared among TCI states, reducing the need for multiple DCI transmissions and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate DCI is used to schedule multiple TCI states in multiple TTIs, then each TCI state can be individually controlled, but control communication overhead and UE monitoring overhead increase
Solution Approach 1:
The patent combines multiple separate DCI messages into a single unified DCI message that schedules multiple TCI states across multiple TTIs. The unified DCI contains a TCI field that indicates multiple TCI states, allowing the UE to receive scheduling information for multiple TCI states in one control message rather than multiple separate messages, thereby reducing control overhead while maintaining individual TCI state control capability
Solution Approach 2:
The unified DCI message serves multiple functions simultaneously: it schedules multiple TCI states, indicates resource allocations for multiple TTIs, and provides beam management information for multiple beams. This multi-functional approach allows a single DCI message to replace what would traditionally require multiple separate DCI messages, reducing control communication overhead while maintaining scheduling flexibility
2Adaptability or versatility
If separate DCI is used to schedule multiple TCI states in multiple TTIs, then each TCI state can be individually scheduled, but UE control monitoring overhead increases
Solution Approach 1:
The patent merges multiple DCI monitoring operations into a single unified DCI message reception. Instead of the UE needing to monitor and decode multiple separate DCI messages for different TCI states, the unified DCI consolidates all scheduling information into one message, reducing the time and processing overhead required for control monitoring while maintaining the ability to individually schedule multiple TCI states
3Adaptability or versatility
If multiple DCI transmissions are used for multiple TCI states, then comprehensive resource allocation is achieved, but control communication efficiency decreases
Solution Approach 1:
The patent combines multiple DCI transmissions into a single unified DCI message that comprehensively allocates resources for multiple TCI states across multiple TTIs. The unified DCI contains resource allocation information, TCI state indications, and scheduling parameters for multiple beams in one message, achieving comprehensive resource allocation coverage while improving control communication efficiency by reducing the number of separate transmissions required
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive single downlink control information (DCI) that indicates resources for a plurality of transmission configuration indicator (TCI) states for transmitting or receiving communications in a plurality of transmission time intervals (TTIs). The UE may transmit or receive the communications in the plurality of TTIs in accordance with the DCI. Numerous other aspects are provided.