Multi-Beam Carrier Operation Using Shared TCI State Activation
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Solution Overview
Problem
Existing wireless communication systems do not adequately accommodate channel state information reporting for large antenna arrays, particularly in multi-beam operations, which is crucial for efficient radio interface efficiency and coverage.
Innovation Solution
Implementing a method and apparatus for downlink and uplink multi-beam operation in wireless communication systems by using a UE and BS that receive and transmit based on a list of component carriers and transmission configuration indicator states, with activation commands via MAC-CE, to determine and activate TCI states for improved channel quality reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing channel quality reporting processes are used, then the reporting process is simple, but it does not sufficiently accommodate reporting of channel state information associated with large antenna arrays
Solution Approach 1:
The patent segments the channel state information reporting by introducing separate reporting mechanisms for different antenna arrays. It divides the reporting process into component carrier-specific reporting and antenna array-specific reporting, allowing large antenna arrays to be accommodated without overwhelming the reporting process. The segmentation enables selective reporting based on antenna array size and configuration.
Solution Approach 2:
The patent adds a new dimension to the reporting process by introducing spatial dimension parameters for large antenna arrays. It extends the traditional frequency-domain reporting to include spatial domain characteristics, enabling the system to handle two-dimensional or three-dimensional antenna arrays by reporting channel state information across multiple spatial layers.
2Productivity
If multi-beam operation is implemented for large antenna arrays, then radio interface efficiency and coverage are improved, but the complexity of beam management and channel state information reporting increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam management parameters and channel state information reporting structures before multi-beam operations begin. The base station pre-establishes beam correspondence relationships and configures appropriate reporting formats, reducing the real-time management complexity during actual multi-beam operations.
Solution Approach 2:
The patent creates a universal reporting framework that can handle both single-beam and multi-beam operations, as well as various antenna array configurations. The channel state information reporting structure is designed to be adaptable, using the same basic framework for different beam scenarios, thereby reducing overall system complexity while maintaining versatility.
3Measurement precision
If detailed channel state information is reported for each component carrier, then measurement precision is improved, but the quantity of information to be processed increases
Solution Approach 1:
The patent applies local quality by making the reporting detail adaptive to local conditions. For component carriers with large antenna arrays, more detailed channel state information is reported, while for carriers with smaller arrays or better channel conditions, reporting is reduced. This localized approach maintains measurement precision where needed while reducing overall information quantity.
Solution Approach 2:
The patent dynamically changes reporting parameters based on channel conditions, antenna array size, and traffic requirements. It adjusts the granularity of channel state information reporting, the frequency of reports, and the level of detail according to current system needs, thereby balancing measurement precision with information quantity management.
Data Source
AI summary
A method for operating a user equipment (UE) comprises receiving configuration information including a list of component carriers (CCs) and at least K transmission configuration indicator (TCI) states, where K>1 and each TCI state includes a TCI state identifier (ID) and a quasi co-location information (QCL-Info). The method further includes receiving an activation command via medium access control-control element (MAC-CE) to activate N TCI state IDs from K TCI state IDs, wherein N<K and the activation command is common across the list of CCs, determining a TCI state Ti for a CC i in the list of CCs based on the activated N TCI state IDs, and transmitting an uplink (UL) transmission or receiving a downlink (DL) transmission for the CC i based on a QCL-Info included in the determined TCI state Ti.