Multi-TRP Beam Management via Segmented TCI State Indication
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Solution Overview
Problem
Current 3GPP specifications lack details on common beams for data and control information transmission/reception, particularly in multi-TRP scenarios, leading to unclear updates and potential beam failure detection issues.
Innovation Solution
The method involves receiving and transmitting downlink control information with specific transmission configuration indicators (TCI) states to manage physical downlink shared channels and control channels, ensuring efficient beam management across multiple transmission points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If common beams are used for data and control information transmission in multi-TRP scenarios, then beam management efficiency is improved, but the current specifications lack details leading to unclear updates and potential beam failure detection issues
Solution Approach 1:
The patent segments the TCI state indication into two distinct parts: a first TCI state for control information (PDCCH) and a second TCI state for data information (PDSCH). This segmentation allows independent management and update of beam configurations for control and data channels, resolving the ambiguity in current specifications while maintaining efficient common beam management.
2Ease of operation
If detailed specifications are provided for common beam updates in multi-TRP scenarios, then beam management clarity is improved, but the complexity of the specification increases
Solution Approach 1:
The patent divides the beam management specification into clear segments: control information uses the first TCI state from DCI format 1_1/1_2, while data information uses the second TCI state from DCI format 1_0. This structured segmentation provides operational clarity without requiring complex overall specification structures.
Solution Approach 2:
The patent establishes a universal framework where the same DCI mechanisms (DCI format 1_0, 1_1, 1_2) serve multiple functions by indicating different TCI states for different channel types. This multi-functionality approach simplifies the specification by reusing existing DCI structures rather than creating separate complex signaling mechanisms.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. According to embodiments of the present disclosure, a downlink control information (DCI) indicating a transmission configuration indication (TCI) state is transmitted from a network device to a terminal device. The terminal device applies, based on a first association, the TCI state for receiving a physical downlink shared channel (PDSCH) which is scheduled by the DCI from the network device. The terminal device applies, based on a time threshold and a second association, the TCI state for receiving a physical downlink control channel (PDCCH) transmitted from the network device. As such, a common beam used for PDCCH and PDSCH, which is indicated by a common TCI state, can be updated and the updated beam can be applied for PDCCH and PDSCH transmission/reception in case of multi-TRP transmission.