Sidelink Transmit-Power Control Mode Selection for Indoor Base Stations
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and 5G NR, lack efficient methods to dynamically adjust transmit-power control modes for user equipment (UE) based on its position and signal measurements in sidelink communications, leading to potential power inefficiencies and interference issues.
Innovation Solution
Implementing a system where base stations (BS) configure UE transmit-power control modes based on deployment configurations, UE positions, and signal measurements, using open-loop and closed-loop power control modes to optimize sidelink transmit-power levels, ensuring appropriate power levels for effective communication while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If transmit-power control modes are not dynamically adjusted based on UE position and signal measurements, then device complexity is reduced, but power efficiency deteriorates and interference increases
Solution Approach 1:
The patent implements dynamic adjustment of transmit-power control modes (open-loop, closed-loop, or autonomous) based on real-time UE position and signal measurements. The base station receives position information and measurement reports from UEs, then dynamically selects appropriate power control modes and parameters, making the system adaptive to changing channel conditions rather than static
Solution Approach 2:
The patent establishes feedback mechanisms where UEs measure signal quality (RSRP, SINR) and transmit power control reports to the base station. The base station uses this feedback information to adjust power control parameters and modes, creating a closed-loop system that continuously optimizes power based on actual channel conditions
2Reliability
If transmit-power levels are increased to ensure communication coverage, then communication reliability is improved, but interference to other users increases
Solution Approach 1:
The patent applies different power control modes and parameters to different UEs based on their local channel conditions, positions, and service requirements. Each UE receives customized power control configurations from the base station, allowing optimized power levels tailored to specific local conditions rather than uniform power control across all users
Solution Approach 2:
The patent dynamically changes power control parameters (target received power P0, path loss compensation factor alpha, maximum power limits) based on UE position, channel measurements, and deployment scenarios. These parameter adjustments enable the system to maintain reliable communication while adapting power levels to minimize interference in different environmental conditions
3Adaptability or versatility
If autonomous power control is enabled at UE, then device autonomy and responsiveness are improved, but coordination with network and interference management become difficult
Solution Approach 1:
The patent segments power control functionality into three distinct modes: autonomous UE-based control, network-controlled closed-loop, and base station-configured open-loop. The base station can select and switch between these modes for different UEs or different time periods, allowing flexible division of control responsibilities between network and device while managing overall coordination
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques for assigning or adjusting a transmit-power control mode, or parameters of a transmit-power at a user equipment used in sidelink communications. In some examples, the disclosure describes determining a user equipment (UE) is connected to the BS, and configuring the UE to use a first transmit-power control mode for determining a transmit-power used for transmitting wireless data over a sidelink based on the BS being positioned indoors.