Joint TCI State Update for Rotating Communication Devices
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Solution Overview
Problem
Current communication systems face challenges in efficiently updating joint transmission configuration indication (TCI) states, particularly in scenarios where devices rotate, leading to beam misalignment and increased signaling overhead, which can result in link drops and latency issues in ultra-reliable and low-latency communications.
Innovation Solution
A communication device is configured to detect or predict rotations and update active joint TCI states by associating reception and transmission spatial filters, allowing for rapid correction of beam misalignment through minimal RS transmissions, and transmitting TCI update messages to adjust beam configurations proactively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent UL and DL beam indication is used, then beam management flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent combines UL and DL TCI state indications into a unified framework where a single TCI state can indicate both uplink and downlink beam configurations. This merging reduces the number of separate indications needed while maintaining the ability to manage beams independently when required, thus reducing signaling overhead while preserving flexibility.
Solution Approach 2:
The unified TCI state structure serves multiple functions by simultaneously indicating UL and DL beam configurations. A single TCI state can be applied to multiple channels and reference signals in both uplink and downlink directions, making the indication mechanism universal and reducing redundant signaling.
2Measurement precision
If device rotation is detected and TCI states are updated proactively, then beam alignment accuracy is improved, but measurement and processing time increases
Solution Approach 1:
The system performs preliminary actions by detecting device rotation and proactively updating TCI states before beam misalignment occurs. By monitoring rotation and predicting beam failure conditions, the system updates beam configurations in advance, maintaining accurate alignment without waiting for actual beam failure to be detected.
Solution Approach 2:
The patent implements feedback mechanisms where the communication device monitors its own rotation status and channel conditions, then uses this feedback to trigger proactive TCI state updates. The feedback loop continuously monitors rotation metrics and adjusts beam configurations accordingly, maintaining alignment accuracy while optimizing response time.
Data Source
AI summary
The disclosure provides methods, devices, and non-transitory computer-readable storage media. An example method includes determining a transmission configuration indication (TCI) state update for an active joint TCI state upon detecting or predicting a rotation of the first communication device around at least one rotational axis of the first communication device. The active joint TCI state associates at least one reception spatial filter of the first communication device with at least one transmission spatial filter of a second communication device, or at least one transmission spatial filter of the first communication device with at least one reception spatial filter of the second communication device. The example method further includes transmitting a TCI update message to the second communication device. The TCI update message indicates the TCI state update.