Adaptive SSB and CSI-RS Power Control for Cell Edge Handover
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Solution Overview
Problem
Conventional wireless communication systems face challenges in optimizing SSB and CSI-RS transmission power levels, leading to issues such as interference, coverage overlap, and hand-off failures, which affect network performance and capacity.
Innovation Solution
Dynamic scaling of SSB and CSI-RS power levels based on operating conditions, using parameters like failure rates, cell load, mobility success rates, and interference measurements to adjust transmission power, thereby optimizing coverage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transmission power of SSB and CSI-RS is increased to improve coverage, then coverage area is improved, but interference between cells increases and hand-off failures occur
Solution Approach 1:
The patent implements dynamic power adjustment where the base station continuously monitors operating conditions (failure rates, cell load, mobility success rates, interference measurements) and adjusts SSB and CSI-RS transmission power in real-time. This transforms the static power level into a dynamic parameter that adapts to changing network conditions, resolving the contradiction between maintaining coverage and reducing interference.
Solution Approach 2:
The patent changes the transmission power parameter of SSB and CSI-RS based on monitored operating conditions. By computing scaling values and scaling factors, the system adjusts the power parameter dynamically, allowing coverage to be maintained when needed while reducing power to minimize interference during normal operations.
2Object-affected harmful factors
If transmission power of SSB and CSI-RS is adjusted dynamically to reduce interference, then interference is reduced, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the base station monitors operating conditions (failure rates, cell load, mobility success rates, interference measurements) and uses this feedback to adjust transmission power. The system computes scaling values based on monitored parameters and applies scaling factors to adjust power levels, creating a closed-loop control system that reduces interference while managing complexity through automated decision-making.
3Device complexity
If conventional fixed power levels are used for SSB and CSI-RS, then system complexity is low, but hand-off failures and coverage optimization are poor
Solution Approach 1:
The patent transforms the static, fixed power level into a dynamic parameter that automatically adjusts based on monitored operating conditions. By implementing real-time power adjustment based on failure rates, cell load, and mobility success rates, the system improves hand-off reliability without requiring complex manual configuration or intervention.
Data Source
AI summary
A base station configured to perform a power scaling in a wireless communication system includes at least one processor configured to receive signals from one or more user equipment (UE), the signals including at least one parameter indicative of corresponding operating conditions at the one or more UEs, determine an initial synchronization signal block (SSB) transmission power, determine, based on the at least one parameter, that the initial SSB transmission power is to be adjusted to affect the corresponding operating condition, responsive to determining that the initial SSB transmission power is to be adjusted, compute a first scaling value, compute a first scaling factor, adjust the initial SSB transmission power based on the first scaling value and the first scaling factor to compute an adjusted transmission power, and transmit the SSB based on the adjusted transmission power.