Default TCI States for Spatial Filter Management in Full Duplex
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing spatial filters in full duplex mode, leading to increased self-interference and reduced reliability in downlink transmissions due to the lack of optimal transmission configuration indicator (TCI) states.
Innovation Solution
The implementation of default TCI states based on active TCI states for full duplex mode, which include spatial filters, to improve the reliability and quality of downlink transmissions by determining suitable uplink and downlink beam pairs and applying corresponding spatial filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex mode is implemented without optimal TCI states, then spectral efficiency and communication capacity are improved, but self-interference increases and transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring default TCI states before full duplex transmission begins. The base station provides default TCI state indications to the UE in advance, which contain spatial filter information that will be used for downlink reception. This preparatory configuration ensures that when full duplex mode starts, the UE already has the necessary spatial filtering parameters to mitigate self-interference, thus maintaining transmission reliability while enabling spectral efficiency improvements.
2Device complexity
If spatial filters are applied in full duplex mode without default TCI states, then device complexity is reduced, but self-interference mitigation capability deteriorates
Solution Approach 1:
The patent introduces default TCI states as an intermediary element between the base station and the UE. These default TCI states contain pre-determined spatial filter configurations that act as a mediator to enable effective self-interference mitigation. Rather than requiring complex real-time spatial filter optimization, the system uses these intermediary default configurations to provide sufficient spatial filtering capability, thus reducing device complexity while still addressing self-interference effectively.
3Reliability
If dynamic TCI state switching is implemented for full duplex mode, then transmission quality is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies local quality by providing different TCI state configurations for different transmission scenarios. Specifically, separate default TCI states are configured for full duplex mode versus other modes, with each having mode-specific spatial filter parameters. This localized optimization allows the system to achieve high transmission quality for full duplex communications without requiring complex dynamic switching across all scenarios, thereby reducing overall processing complexity while maintaining transmission quality where it matters most.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station in a full duplex mode, a first downlink transmission associated with a spatial filter. The UE may decode the first downlink transmission according to a default transmission configuration indicator (TCI) state that indicates the spatial filter. The default TCI state may be based at least in part on a first active TCI state for the full duplex mode. Numerous other aspects are provided.