SBFD RACH Power Offsets for Downlink Interference Control
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Solution Overview
Problem
In subband full-duplex communication, existing methods for determining RACH transmission power in subband full-duplex (SBFD) symbols cause interference due to the same power levels being used for both SBFD and non-SBFD slots, leading to potential interference with downlink signals.
Innovation Solution
A method and apparatus for determining RACH transmission power in SBFD symbols by applying an offset parameter, such as SBFD_Power_Offset, to adjust the PRACH transmission power based on the specific characteristics of SBFD symbols, ensuring it does not exceed the maximum transmission power and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same RACH transmission power is used for both SBFD and non-SBFD slots, then the transmission power is simplified to manage, but interference occurs with downlink signals in SBFD slots
Solution Approach 1:
The patent applies different power offset configurations to different RACH occasions based on their slot type. Specifically, it configures a first power offset for RACH occasions in non-SBFD slots and a second power offset for RACH occasions in SBFD slots. This local differentiation allows the system to maintain simple overall power management while preventing downlink interference in SBFD slots by using appropriate power offsets tailored to each slot's characteristics.
2Object-affected harmful factors
If RACH transmission power is reduced in SBFD slots to avoid interference, then interference with downlink signals is minimized, but RACH transmission reliability may deteriorate
Solution Approach 1:
The patent dynamically adjusts RACH transmission power based on the slot type (SBFD or non-SBFD) by configuring different power offsets for different RACH occasions. This dynamic adaptation allows the system to reduce power in SBFD slots to prevent downlink interference while maintaining adequate power levels in non-SBFD slots to ensure RACH transmission reliability. The power offset configuration is flexible and can be adjusted according to actual channel conditions and interference requirements.
Data Source
AI summary
Provided are a method and apparatus for determining RACH transmission power in subband full-duplex communication. The method of terminal may include receiving a single piece of random access channel (RACH) resource information, selecting a first RACH occasion belonging to a subband full duplex (SBFD) symbol based on the received single piece of RACH resource information, and determining RACH transmission power for the selected first RACH occasion by applying an offset for the SBFD symbol.