Flexible Duplex TCI Configuration for Interference Mitigation
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in resource utilization and increased latency due to static duplex mode configurations, particularly in TDD spectrum, which limits flexibility in uplink and downlink configurations, leading to complex interference environments and suboptimal beam forming-based transmissions.
Innovation Solution
A method for configuring link directions in flexible duplex mode by using reference signal resources to determine spatial parameters, allowing for dynamic adjustment of time-frequency resources and interference mitigation through the selection of appropriate reference signal resource sets based on changing interference situations and transmission configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference is avoided and Cross Link interference is mitigated, but resource utilization decreases and latency increases
Solution Approach 1:
The patent applies dynamic time-domain resource allocation by configuring different slot formats (downlink, uplink, flexible) based on actual traffic conditions. The base station dynamically adjusts the duplex mode for different time slots, transitioning from static half-duplex to dynamic flexible duplex operation, thereby improving resource utilization while managing interference through adaptive configuration.
Solution Approach 2:
The patent segments the time-domain resources into different slot formats (downlink slots, uplink slots, flexible slots) and frequency-domain resources into different bands. By segmenting resources and applying different duplex configurations to different segments, the system can simultaneously maintain interference mitigation in certain segments while improving overall resource utilization through flexible allocation in others.
2Productivity
If flexible duplex mode is supported with variable link orientation, then resource utilization improves and latency decreases, but interference environment becomes more complex and traditional TCI configuration needs redesign
Solution Approach 1:
The patent applies local quality by configuring different TCI states and spatial parameters for different time-frequency resources based on their specific interference conditions. Instead of using a uniform TCI configuration across all resources, the system tailors the TCI configuration to local conditions (specific slots, bands, and transmission directions), thereby managing complexity through localized optimization rather than global redesign.
Solution Approach 2:
The patent changes the parameters of TCI configuration from static to dynamic by introducing flexible TCI state indication mechanisms. The system modifies TCI parameters (such as spatial relation info, QCL assumptions) based on varying interference conditions and transmission requirements, allowing adaptive optimization without fundamental redesign of the TCI framework.
3Adaptability or versatility
If both downlink and uplink transmissions are performed on different frequency bands in a same slot, then flexible duplex operation is enabled, but beam forming-based transmission faces complex interference requiring redesigned TCI configuration
Solution Approach 1:
The patent resolves the conflict by introducing an additional dimension of control - the TCI state indication dimension. Instead of managing interference solely through frequency and time separation, the system adds TCI state configuration as another dimension that provides explicit spatial and interference relationship information, thereby simplifying the overall system complexity while enabling flexible duplex operation across frequency bands.
Data Source
AI summary
A node first receives a first signaling, the first signaling is used to indicate a first reference signal resource; then receives or transmits a first signal in a first time-frequency resource set, the first reference signal resource is used to determine spatial parameters of the first signal; the first signaling is used to indicate the first time-frequency resource set; the first signaling indicates the first reference signal resource from K1 candidate reference signal resources; a target reference signal resource set comprises the K1 candidate reference signal resources; time-domain resources occupied by the first time-frequency resource set are used to determine the target reference signal resource set from M1 reference signal resource sets. It improves the manner in which the TCI is determined, hence improves the manner in which beamforming is transmitted in a spectrum configuration based on a flexible duplex mode or variable link direction to optimize system performance.