Sidelink Power Control Coordination Across Coverage Gaps
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Solution Overview
Problem
Existing technologies have not effectively addressed the challenge of determining power control parameters for wireless communications, particularly in scenarios where the first UE is within the coverage of the base station, and the second UE is outside the coverage of the base station, and the second UE is outside the coverage of the base station. The first UE is outside the coverage of the base station. The first UE is outside the coverage of the base station, and the second UE is outside the coverage of the base station. The first UE is inside the coverage of the base station, but the first UE is communicating with the base station through a first beam, and the second UE is communicating with the base station through a second beam. The first UE is unable to determine the power control parameters accurately due to lack of coverage or different beams.
Innovation Solution
The first UE determines a power control configuration by receiving an indication of power control parameters from the second UE, which is within the coverage area of the base station, and adjusts its power control parameters accordingly to ensure effective communication with the second UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the first UE determines power control parameters independently, then the determination process can be autonomous, but the accuracy of power control parameters deteriorates due to lack of coverage or different beams
Solution Approach 1:
The patent introduces a base station as an intermediary entity that provides reference signal transmissions and power control parameter configurations. The first UE uses these intermediary resources to accurately determine power control parameters even when out of coverage or using different beams, thus resolving the contradiction between autonomous operation and measurement accuracy.
Solution Approach 2:
The base station performs preliminary actions by transmitting reference signals and configuring power control parameters before the first UE needs to determine its transmit power. This preliminary provision of measurement resources enables accurate power control parameter determination without requiring the first UE to be in direct coverage or use the same beam.
2Reliability
If the first UE transmits with high power to ensure sufficient reception at the second UE, then communication reliability improves, but interference on the access link increases
Solution Approach 1:
The patent implements feedback mechanisms where the base station provides power control parameter configurations based on observed conditions. The first UE uses these feedback-based parameters to adjust its transmit power, achieving sufficient reception reliability at the second UE while preventing excessive interference on the access link through coordinated power control.
Solution Approach 2:
The base station dynamically changes power control parameters (such as path loss compensation factors and target received power levels) based on the specific scenario where the first UE is out of coverage or using different beams. These parameter adjustments enable the first UE to transmit at appropriate power levels that ensure reliability without causing harmful interference.
3Adaptability or versatility
If the first UE uses preconfigured resources and power for communication, then communication can be maintained without network coverage, but power control accuracy deteriorates
Solution Approach 1:
The base station performs preliminary configuration by providing reference signal resources and power control parameter settings before the first UE needs to communicate out of coverage. This preliminary preparation enables the first UE to maintain communication versatility without coverage while using accurate power control parameters derived from these preconfigured resources.
Solution Approach 2:
The base station acts as an intermediary that provides measurement resources and power control configurations even when the first UE is out of coverage or using different beams. These intermediary resources enable the first UE to achieve both communication adaptability and power control accuracy in scenarios without direct network coverage.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. In some cases, a first user equipment (UE) within a coverage area of a base station may determine a power control configuration. The first UE may transmit an indication of the power control configuration to a second UE, which may adjust one or more power control parameters based on the indication. The one or more power control parameters may include a target received power, a compensation factor, a downlink path loss between the base station and the first UE, or a combination thereof. The second UE may use the adjusted one or more power control parameters to determine a transmit power and may transmit a message to the first UE with the determined transmit power. In some cases, the second UE may be outside of the coverage area of the base station.