UE Search Space Beam Switching for SBFD Control Reception
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Solution Overview
Problem
Existing wireless communication systems face performance loss due to improper beam application in both sub-band full duplex (SBFD) and non-SBFD resources, leading to interference and inefficiencies in downlink and uplink operations.
Innovation Solution
A method for user equipment (UE) and network devices that involve configuring search space sets with specific transmission configuration indication (TCI) states and reference signals to manage beamforming effectively in both SBFD and non-SBFD resources, ensuring appropriate spatial receiver parameters for downlink control information reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same beam is used for DL reception in both SBFD and non-SBFD resources, then device complexity is reduced, but performance loss occurs due to improper beam application
Solution Approach 1:
The patent applies local quality by configuring different TCI states for different resource types (SBFD vs non-SBFD). Specifically, the network device configures a first TCI state for SBFD resources and a second TCI state for non-SBFD resources, allowing each resource type to use the most appropriate beam configuration for its specific characteristics, thereby optimizing performance without excessive complexity
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically select and switch between different TCI states based on the resource type. The UE determines whether to apply the first TCI state or second TCI state depending on whether the current resources are SBFD or non-SBFD, allowing adaptive beam management that responds to changing operational conditions
2Object-affected harmful factors
If separate antenna panels are used for UL transmission and DL reception, then adjacent channel interference is reduced, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the antenna system into separate panels for UL transmission and DL reception. This physical segmentation allows independent optimization of each panel's beamforming characteristics, reducing adjacent channel interference while managing complexity through modular configuration of multiple TCI states for different panels and resource types
Data Source
AI summary
A method used by a user equipment, a method used by a network device, and a user equipment are provided. In the method, a search space (SS) set configuration is received, and a downlink control information (DCI) is received according to the SS set configuration. An SS set is configured with a first control resource set (CORESET). The first CORESET is configured with a first transmission configuration indication (TCI) state. The first TCI state is configured with one reference signal (RS). The reference RS is associated with a spatial receiver (RX) parameter.