Wireless Resource Configuration Using TCI and SRI for Duplex Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing dynamically changing traffic loads for low latency services like extended reality and self-driving cars due to limitations in semi-static or dynamic TDD UL/DL configurations and inefficient frequency resource utilization in FDD schemes, leading to transmission delays and interference.
Innovation Solution
Implementing a method for resource configuration in wireless communication systems that allows for half duplex or full duplex operations by using transmission configuration indicators (TCI) and sounding reference signal resource indicators (SRI) to manage DL and UL signals dynamically, enabling flexible resource allocation and interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-static or dynamic TDD UL/DL configuration is used, then resource allocation flexibility is improved, but transmission time delay increases and interference between operators occurs
Solution Approach 1:
The patent implements dynamic switching between half-duplex and full-duplex operation modes based on traffic conditions. The base station receives full-duplex capability information from UEs and dynamically configures TCI states and SRI information to enable flexible transition between HD and FD modes, allowing the system to adapt resource allocation in real-time without fixed semi-static configurations, thereby reducing transmission delays while maintaining flexibility.
2Productivity
If FDD scheme is used, then frequency resource utilization for DL/UL direction is limited, but simultaneous DL and UL operations are not achieved
Solution Approach 1:
The patent enables the same frequency resources to serve multiple functions by implementing full-duplex operation. The base station configures TCI states that identify reference signals for both DL and UL directions within the same carrier, allowing simultaneous downlink transmission and uplink reception on overlapping frequency resources. This multi-functional use of frequency resources improves network efficiency and productivity while maintaining adaptability.
3Productivity
If full duplex operation is implemented, then resource utilization and network efficiency are improved, but self-interference and cross-link interference occur
Solution Approach 1:
The patent applies local quality by configuring different TCI states for different spatial directions and frequency sub-bands. The base station provides SRI information that indicates specific reference signals appropriate for full-duplex operation in particular local contexts. This allows the system to optimize beamforming and spatial filtering locally to mitigate self-interference and cross-link interference while maintaining high resource utilization in full-duplex modes.
Data Source
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AI summary
A method of operating a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving, from a base station, control information of a downlink (DL) signal or an uplink (UL) signal within a specific time duration in which half duplex (HD) or full duplex (FD) is possible, the control information including information on a transmission configuration indicator (TCI) state or a sounding reference signal resource indicator (SRI) that is available in a time duration for the FD; and performs a transmission and a reception in an indicated time duration among the time duration for the FD using a TCI state or an SRI corresponding to the indicated time duration based on the indication information.