SBFD Uplink Power Control for Symbol-Specific Interference
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Solution Overview
Problem
In a TDD system, there is an imbalance in coverage and latency between downlink and uplink due to subband full duplex (SBFD) causing higher interference on SBFD symbols, affecting uplink transmission performance.
Innovation Solution
Implementing different open-loop power control parameters for SBFD and non-SBFD symbols to determine transmit powers, using distinct parameters for different types of physical uplink shared channel (PUSCH) transmissions, such as cell-specific and terminal device-specific target received power parameters, to adapt to varying interference levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subband full duplex (SBFD) is used to improve uplink coverage and reduce latency in TDD systems, then uplink coverage and latency are improved, but interference intensity on SBFD symbols increases
Solution Approach 1:
The patent applies local quality by configuring different open-loop power control parameters specifically for SBFD symbols versus non-SBFD symbols. The network device sends first open-loop power control parameters for SBFD symbols and second open-loop power control parameters for non-SBFD symbols, allowing the terminal to adapt transmit power locally to the interference conditions of each symbol type.
Solution Approach 2:
The patent implements parameter changes by introducing distinct power control parameters (P0, alpha, pathloss compensation coefficients) for different symbol types. The terminal calculates first transmit power using first power control parameters for SBFD symbols and second transmit power using second power control parameters for non-SBFD symbols, dynamically adjusting parameters based on interference conditions.
2Object-affected harmful factors
If different open-loop power control parameters are used for SBFD and non-SBFD symbols to reduce interference, then interference intensity is reduced, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing power control parameters into separate sets for SBFD symbols and non-SBFD symbols. The network device segments the parameter configuration by sending first information containing first open-loop power control parameters and second information containing second open-loop power control parameters, allowing independent optimization for each symbol type without requiring complex cross-parameter coordination.
Data Source
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AI summary
This application relates to the field of wireless communication, and in particular, to a full-duplex scenario in a wireless communication system, and provides a communication method, apparatus, and system, to better implement power control when a terminal device performs an uplink transmission in the scenario, so as to ensure performance of the uplink transmission. The method may include: receiving first information, where the first information indicates a first open-loop power control parameter and a second open-loop power control parameter; determining a first power and a second power based on the first information, where the first open-loop power control parameter used for determining the first power is different from the second open-loop power control parameter used for determining the second power, the first power is a transmit power of a first PUSCH, the second power is a transmit power of a second PUSCH, a symbol occupied by the first PUSCH is an SBFD symbol, and a symbol occupied by the second PUSCH is a non-SBFD symbol; and sending the first PUSCH on a first BWP by using the first power, and sending the second PUSCH on the first BWP by using the second power.