Unified TCI Indication for Multi-TRP Wireless Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently conveying multiple transmission configuration indicator (TCI) states, leading to increased latency and reduced communication efficiency when multiple transmission reception points (TRPs) are involved.
Innovation Solution
The proposed solution involves a method where a user equipment (UE) receives a single instance of downlink control information (DCI) that includes multiple TCI states for multiple TRPs, using either multiple TCI-indication fields or a single TCI field with codepoints mapping to multiple states, thereby reducing latency and enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple separate DCI instances are used to convey TCI states for multiple TRPs, then each TCI state can be indicated separately, but latency increases and communication efficiency decreases
Solution Approach 1:
The patent combines multiple TCI state indications into a single DCI instance by including multiple TCI-indication fields or a single TCI field with codepoints that map to multiple TCI states. This merging approach allows the UE to receive all necessary TCI states for multiple TRPs in one control message, eliminating the need to wait for multiple separate DCI instances and thereby reducing latency while improving communication efficiency
2Loss of time
If a single DCI includes multiple TCI-indication fields or a TCI field with codepoints mapping to multiple states, then latency is reduced, but the complexity of the control information increases
Solution Approach 1:
The patent makes the TCI field multi-functional by designing codepoints that can map to multiple TCI states corresponding to multiple TRPs. This universal approach allows a single TCI field to serve multiple purposes - indicating TCI states for different TRPs - thereby reducing the need for separate fields and minimizing the increase in control information complexity while still conveying all necessary TCI states in a single DCI instance
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may receive signaling identifying a configuration for the UE to communicate with a first transmission reception point (TRP) and a second transmission reception point. The UE may receive a single downlink control message that includes one or more transmission configuration indicators, the one or more transmission configuration indicators indicating a first transmission configuration indicator state for the first TRP and a second transmission configuration indicator state for the second transmission reception point. The UE may communicate with at least one of the first TRP or the second TRP according to the one or more transmission configuration indicators based on receiving the single downlink control message.