UE Self-Interference Cancellation Capability Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing self-interference in full-duplex operations, particularly when uplink and downlink communications overlap, leading to interference issues that can result in failed communications and resource wastage.
Innovation Solution
The method involves user equipment (UE) transmitting an indication of its capabilities for self-interference cancellation at specific center frequencies, allowing the base station to configure parameters such as modulation and coding schemes, uplink allocation sizes, and duplex modes based on the UE's capabilities, thereby optimizing communication settings to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operations are implemented to improve spectral efficiency and resource utilization, then communication productivity increases, but self-interference between uplink and downlink signals deteriorates communication reliability
Solution Approach 1:
The patent converts the harmful self-interference effect into a beneficial measurement opportunity. By intentionally allowing the transmitted signal to interfere with the received signal in a controlled manner, the system can measure the self-interference channel characteristics and use this information to configure appropriate communication parameters (such as modulation and coding schemes, power levels, or resource allocation) that compensate for the interference, thereby maintaining full-duplex operation reliability while preserving spectral efficiency gains
2Reliability
If self-interference cancellation capabilities are enhanced to improve communication reliability, then interference reduction improves, but device complexity increases
Solution Approach 1:
The patent implements a self-service approach where the UE autonomously measures its own self-interference characteristics by analyzing the interaction between its transmitted and received signals. The UE then self-configures appropriate communication parameters based on these measurements without requiring complex external calibration or sophisticated active cancellation hardware. This self-measuring and self-configuring mechanism achieves reliable full-duplex communication while minimizing device complexity
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of capabilities of the UE for self-interference cancellation at one or more center frequencies. The UE may receive an indication of a configuration, based at least in part on the indication of capabilities, associated with one or more subsequent communications. Numerous other aspects are described.