Wireless Node Uplink Power Control in SBFD Full-Duplex Symbols
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Solution Overview
Problem
The existing NR system faces challenges with resource utilization, latency, and interference issues due to half-duplex mode in TDD spectrum, necessitating a flexible duplex mode like SubBand non-overlapping Full Duplex (SBFD) which introduces self-interference and Cross-Link Interference (CLI), requiring advanced interference cancellation techniques.
Innovation Solution
A method for uplink power control in SBFD scenarios involves configuring two sets of power control parameters, including P0 values and path loss reference signals, to adapt transmission power based on symbol type, enhancing flexibility and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference and Cross-Link Interference are avoided, but resource utilization rate decreases and latency increases
Solution Approach 1:
The patent implements dynamic link direction configuration where the base station can flexibly switch between uplink and downlink directions on different time resources. This dynamic adjustment allows the system to transition from static half-duplex mode to flexible duplex mode, improving resource utilization while managing interference through adaptive power control and resource allocation strategies
2Productivity
If flexible duplex mode or full-duplex mode is supported, then resource utilization improves, but self-interference and Cross-Link Interference increase
Solution Approach 1:
The patent applies different power control parameters and interference management strategies to different time resources based on their link direction. By configuring specific power control parameter sets for uplink, downlink, and flexible symbols, the system optimizes local transmission quality while minimizing interference in each specific time resource, rather than applying a uniform approach across all resources
Solution Approach 2:
The patent dynamically adjusts transmission power parameters based on the link direction and interference conditions of different time resources. By changing power control parameters (such as P0, alpha, and path loss compensation factors) according to whether a symbol is uplink, downlink, or flexible, the system adapts to varying interference environments and optimizes resource utilization while controlling interference levels
3Reliability
If advanced interference cancellation techniques are used, then interference problems are solved, but device complexity increases
Solution Approach 1:
The patent performs preliminary interference management by configuring appropriate power control parameters before transmission occurs. By pre-configuring power control parameter sets based on expected interference conditions and link directions, the system prevents interference problems rather than requiring complex post-transmission cancellation techniques, thereby reducing device complexity while maintaining reliability
Data Source
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AI summary
The present application discloses a method and apparatus used in a node for wireless communication. A first node receives target signaling and first signaling; the target signaling indicates a first symbol set, and the first signaling comprises a first domain, the first domain of the first signaling indicating at least one reference signal resource and a first power value, and the first power value being one of a first candidate power value and a second candidate power value; the first node sends a first signal in the first symbol set, the sending power of the first signal depending on the first power value, the first signal having a spatial relationship with the at least one reference signal resource, and whether the first power value is the first candidate power value or the second candidate power value depending on whether the first symbol set is for downlink. The present application improves uplink transmission power control in a full-duplex scenario, improving uplink transmission performance, and improving system flexibility and adaptability.