UE Capability Signaling for Full Duplex Mode Switching
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently switching between full duplex (FD) and half duplex (HD) modes in user equipment (UE), which affects communication capacity and resource allocation.
Innovation Solution
The implementation of subband full duplex (SBFD) configurations in UE, where flexible or downlink symbols are configured as SBFD symbols with at least an uplink subband, enables the transmission of UE capability information related to filter switching and spatial configuration switching capabilities, allowing seamless switching between FD and HD modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex mode is used to increase communication capacity, then network throughput is improved, but self-interference and signal quality deteriorate
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands, allowing certain subbands to operate in full duplex mode while others operate in half duplex mode. This segmentation enables the system to achieve full duplex communication capacity in specific frequency portions while avoiding self-interference in other portions, thus resolving the contradiction between communication capacity and self-interference.
2Object-affected harmful factors
If filtering is applied to reduce self-interference, then signal quality is improved, but filter switching complexity increases
Solution Approach 1:
The patent implements dynamic filter switching capability where the UE can switch between different filtering configurations based on the operational mode (full duplex or half duplex). The network configures multiple filtering options and the UE dynamically selects the appropriate filter set according to current communication requirements, reducing unnecessary filtering complexity while maintaining signal quality.
3Adaptability or versatility
If spatial configuration switching is implemented to support mode switching, then adaptability is improved, but configuration complexity increases
Solution Approach 1:
The patent employs preliminary configuration where the network pre-configures multiple spatial parameters and transmission configuration indicator (TCI) states corresponding to different operational modes. The UE stores these pre-configured spatial parameters and can quickly switch between them based on network indication, avoiding the need for complex real-time spatial configuration calculations and reducing configuration complexity during actual mode switching.
4Productivity
If subband full duplex configuration is used to enhance resource utilization, then communication efficiency is improved, but UE capability indication complexity increases
Solution Approach 1:
The patent applies local quality by indicating UE capability specifically for subband full duplex operations rather than requiring comprehensive capability indication for all possible scenarios. The capability indication is tailored to the specific subband FD configuration parameters and filtering capabilities needed for this particular mode, reducing overall indication complexity while maintaining sufficient information for efficient resource utilization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit UE capability information associated with a subband full duplex (SBFD) configuration in which a set of flexible symbols are configured as SBFD symbols with a subband, wherein the UE capability information comprises a UE capability indication associated with switching between a UE full duplex mode and a UE half duplex mode. The UE may communicate in association with the UE capability indication. Numerous other aspects are described.