Beam-Specific Power Control for Stable SINR During CLI Slots
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Solution Overview
Problem
Existing mobile communication systems face challenges in managing cross-link interference (CLI) during dynamic Time Division Duplex (TDD) operations, leading to varying signal-to-interference-plus-noise ratios (SINR) for user equipment (UE) due to beam-specific interference levels, particularly in gNB-to-gNB scenarios.
Innovation Solution
Implementing beam-specific power control methods, where network entities calculate and signal synchronization signal block-specific physical random access channel target receive power values to user equipment, adjusting transmission power based on interference levels and beam configurations to maintain consistent SINR during CLI slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD operations are implemented to increase network flexibility and resource allocation, then network adaptability and resource utilization are improved, but cross-link interference between gNBs increases causing varying SINR for user equipment
Solution Approach 1:
The patent applies local quality by implementing beam-specific power control where different power levels are assigned to different synchronization signal blocks based on their specific interference characteristics. Each beam direction receives customized power adjustment rather than uniform power control, addressing the local interference conditions in specific spatial directions caused by dynamic TDD operations.
Solution Approach 2:
The patent changes the power parameter dynamically based on beam-specific interference measurements. The network entity adjusts the target receive power values for different synchronization signal blocks according to measured interference levels, transforming static power control into dynamic parameter adjustment that adapts to varying interference conditions in different beam directions.
2Reliability
If beam-specific power control is implemented to maintain consistent SINR during CLI slots, then signal quality is improved, but network entity calculation and signaling complexity increases
Solution Approach 1:
The patent segments the power control mechanism into beam-specific components where each synchronization signal block is controlled independently based on its specific interference conditions. This segmentation allows targeted power adjustment for affected beams while leaving other beams unchanged, maintaining SINR consistency without requiring complete reconfiguration of all network parameters.
Solution Approach 2:
The patent implements feedback mechanisms where the network entity measures interference levels for different beams and uses this feedback information to adjust power settings. The measured interference data feeds back into the power control decision process, enabling automatic adaptation to changing interference conditions without manual intervention or complex centralized control.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for power controls to allow UE to receive with similar SINR when transmitting during CLI slots and with Rx beam-specific cross link interference levels at a victim base station. One method may include receiving, by a UE, a set of SSB-specific PRACH target receive power values associated with a set of slots or symbols, and determining, by the UE, whether the set of slots or symbols comprises a RO.