Dynamic Reference Signal Allocation for Full-Duplex Self-Interference
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Solution Overview
Problem
Full-duplex communication systems face significant performance deterioration due to intra-device self-interference, which requires efficient management of reference signal (RS) allocation to improve communication performance.
Innovation Solution
A method and device for dynamically adjusting reference signal (RS) allocation based on changes in transmit power, where additional RSs are allocated for channel estimation of nonlinear self-interference components when transmit power increases and released when it decreases, with signaling to manage resource allocation effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional reference signals are allocated for channel estimation of nonlinear self-interference components when transmit power increases, then communication performance is improved, but resource overhead increases
Solution Approach 1:
The patent implements dynamic reference signal allocation that adapts to changing transmit power conditions. When transmit power increases above a threshold, additional reference signals are allocated to estimate nonlinear self-interference components. When transmit power decreases below the threshold, these additional reference signals are released. This dynamic adjustment resolves the contradiction by making resource allocation flexible rather than static, improving communication performance when needed while reducing resource overhead when not needed.
Solution Approach 2:
The patent changes the parameter of reference signal allocation quantity based on transmit power level. The system monitors transmit power and adjusts the number of allocated reference signals accordingly - allocating additional reference signals when transmit power exceeds a threshold to enable nonlinear self-interference cancellation, and releasing them when the threshold is not exceeded. This parameter change approach allows the system to optimize communication performance while controlling resource overhead.
2Productivity
If reference signal allocation is dynamically adjusted according to transmit power changes, then resource efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the system monitors transmit power levels and uses this information to control reference signal allocation. The transmit power information serves as feedback that triggers appropriate actions - allocating additional reference signals when power exceeds a threshold and releasing them when it doesn't. This feedback loop improves resource efficiency while keeping the control logic relatively simple and manageable.
Data Source
AI summary
A method for changing reference signal (RS) allocation by a device operating in an FDR scheme may comprise the steps of: determining whether to release an additionally allocated RS according to a transmission power variation of the device or to additionally allocate an RS for channel estimation of a non-linear component of a self-interference signal; and transmitting information on a resource of the RS to be released or information on a resource of the RS to be additionally allocated, according to the determination.