UE Beam Configuration for SBFD and Non-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 control resource sets (CORESETs) and transmission configuration indication states, associating them with serving cell identities and spatial receiver parameters, to optimize beam management and reduce interference in SBFD and non-SBFD environments.
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 beam configuration is simplified, but performance loss occurs due to improper beam application
Solution Approach 1:
The patent segments the beam configuration by creating separate TCI state configurations for SBFD and non-SBFD resources. The network device configures different transmission configuration indication states that are specifically tailored to the characteristics of each resource type, allowing optimized beam management rather than using a single universal beam configuration.
Solution Approach 2:
The patent applies local quality by assigning different beam characteristics to different resource types. Specifically, SBFD resources receive TCI states configured with parameters suitable for full duplex operation, while non-SBFD resources receive TCI states optimized for traditional half duplex operation, ensuring each resource type receives the appropriate beam quality for its specific function.
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 introduces TCI states as an intermediary mechanism that manages the interaction between separate antenna panels. The TCI states carry spatial receiver parameters that coordinate the beamforming operations of different panels, allowing them to operate independently for interference reduction while maintaining system coherence through the intermediary TCI configuration.
3Productivity
If DL and UL bands are allocated in the same symbol in SBFD, then spectral efficiency is improved, but interference between DL and UL increases
Solution Approach 1:
The patent changes key parameters of the TCI states to accommodate full duplex operation. The spatial receiver parameters in the TCI states are specifically adjusted for SBFD resources to enable simultaneous DL and UL reception, allowing the system to operate in the same time-frequency resources while managing interference through parameter optimization rather than resource separation.
Data Source
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AI summary
A method used by a user equipment (UE), a method used by a network device (NW), and a user equipment (UE) 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 CORESET is associated with a serving cell identity, ID. The first TCI state is configured with one reference reference signal, RS. The reference RS is associated with a spatial receiver, RX, parameter.