PUSCH Power Control for SBFD and Non-SBFD Uplink Symbols
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Solution Overview
Problem
In a TDD system, the uplink coverage and latency are poorer compared to an FDD system, and subband full duplex (SBFD) leads to higher interference on SBFD symbols affecting uplink transmission performance, necessitating improved power control.
Innovation Solution
Implementing different open-loop power control parameters for SBFD and non-SBFD symbols to determine varying transmit powers for uplink transmissions, using cell-specific and terminal device-specific target received power parameters, and dynamic signaling to adapt to interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subband full duplex (SBFD) is used to improve uplink coverage and reduce latency, then uplink transmission resources are increased, but interference intensity on SBFD symbols increases affecting uplink performance
Solution Approach 1:
The patent applies local quality by implementing different power control parameters for different symbol types. Specifically, separate open-loop power control parameters (P0_NOMINAL_PUSCH, P0_Ue_PUSCH, alpha) are configured for SBFD symbols versus non-SBFD symbols, allowing localized optimization of transmit power according to the specific interference characteristics of each symbol type
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting power control parameters based on symbol type. The network device configures different sets of power control parameters for SBFD and non-SBFD symbols, and the terminal device selects appropriate parameters based on the current symbol type, thereby adapting transmit power to varying interference conditions
2Reliability
If different power control parameters are used for SBFD and non-SBFD symbols to improve uplink performance, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing power control parameter management into separate configurations for different symbol types. The network device independently configures power control parameters for SBFD symbols and non-SBFD symbols, and the terminal device maintains separate parameter sets for each symbol type, simplifying the management complexity through structured segmentation
Solution Approach 2:
The patent implements dynamics by enabling the terminal device to dynamically select appropriate power control parameters based on the current symbol type. The parameter selection is dynamically adjusted according to whether the current symbol is an SBFD or non-SBFD symbol, allowing adaptive power control without requiring complex manual configuration
Data Source
AI summary
A communication method, apparatus, and system. First information is received, where the first information is usable to indicate a first open-loop power control parameter and a second open-loop power control parameter. A first power and a second power are determined based on the first information, where the first open-loop power control parameter usable for determining the first power is different from the second open-loop power control parameter usable 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. The first PUSCH is sent on a first BWP by using the first power. The second PUSCH is sent on the first BWP by using the second power.