Full-Duplex UE Uplink With Reference Signal Interference Control
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Solution Overview
Problem
In full-duplex communication, self-interference caused by concurrent uplink and downlink transmissions in user equipment (UE) leads to inaccurate reference signal measurements, affecting the reliability of wireless communications systems.
Innovation Solution
The UE is configured with a self-interference threshold to determine whether to use a first or second set of parameters for communication, with the second set involving mitigation techniques to reduce interference during full-duplex operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented to enable concurrent uplink and downlink transmissions, then communication efficiency and resource utilization are improved, but self-interference occurs leading to inaccurate reference signal measurements
Solution Approach 1:
The network entity pre-configures self-interference threshold values and multiple parameter sets before full-duplex communication occurs. The UE receives and stores these configurations in advance, enabling rapid parameter switching when self-interference conditions are detected without disrupting ongoing communication.
Solution Approach 2:
The system dynamically switches between different parameter sets based on real-time self-interference conditions. The UE monitors self-interference levels and selects appropriate parameter sets (first set for high interference, second set for low interference) to optimize both communication efficiency and measurement accuracy under varying conditions.
2Measurement precision
If self-interference mitigation techniques are applied to improve reference signal measurement accuracy, then measurement precision is improved, but communication flexibility and resource utilization are reduced
Solution Approach 1:
The system employs multiple parameter sets that differ in their self-interference mitigation characteristics. By changing parameters such as measurement timing, frequency offsets, and power control settings based on detected self-interference levels, the system achieves accurate measurements without permanently restricting communication flexibility.
Solution Approach 2:
The UE autonomously monitors self-interference conditions and selects appropriate parameter sets without requiring continuous network intervention. This self-service mechanism maintains measurement accuracy while preserving communication flexibility by enabling rapid adaptation to changing interference conditions.
3Adaptability or versatility
If multiple parameter sets are configured for different self-interference conditions, then adaptability to interference conditions is improved, but device complexity increases
Solution Approach 1:
The system uses feedback from self-interference measurements to automatically select among pre-configured parameter sets. The network entity provides feedback through threshold configurations, and the UE uses this feedback to determine when to switch between parameter sets, reducing the complexity of real-time parameter optimization.
Solution Approach 2:
Multiple parameter sets and selection criteria are pre-configured by the network entity before communication begins. This preliminary configuration eliminates the need for complex real-time parameter optimization, as the UE only needs to compare current interference levels against pre-established thresholds and select from predetermined parameter sets.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) with full-duplex capabilities may be configured with a self-interference threshold to be used for full-duplex communication during concurrent reception of a reference signal and transmission of an uplink communication. The UE may receive an allocation of uplink and downlink resources for full-duplex communication within the same time resource using a first set of parameters. If the uplink and downlink resources satisfy the self-interference threshold, the UE may communicate, within the time resource, via the uplink resources, to transmit an uplink communication, and the downlink resources, to receive a reference signal, using a second set of parameters.