Open-Loop Power Control Parameter Selection for D2D WWAN Coexistence
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Solution Overview
Problem
Current power control mechanisms in device-to-device (D2D) and wireless wide area network (WWAN) coexistence networks face challenges in managing interference and optimizing transmission power, leading to inefficiencies and potential data loss due to overlapping resource allocations and interference between D2D and WWAN signals.
Innovation Solution
A method and apparatus that utilize open-loop power control parameters, such as semi-static base power levels and path-loss compensation components, are employed by wireless devices to dynamically adjust transmission power based on transmission conditions, selecting between different sets of power control parameters to minimize interference and ensure effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single set of open-loop power control parameters is used for all transmission conditions, then the device complexity is reduced and ease of operation is improved, but the reliability deteriorates due to inability to adapt to varying interference conditions between D2D and WWAN networks
Solution Approach 1:
The patent implements dynamic power control parameter selection by maintaining multiple sets of open-loop power control parameters (first set for D2D conditions, second set for WWAN conditions) and dynamically selecting the appropriate set based on the current transmission condition. This allows the system to adapt to varying interference conditions while keeping the underlying power control mechanism relatively simple.
Solution Approach 2:
The patent changes power control parameters based on transmission conditions by selecting different parameter sets (P0, alpha) depending on whether the transmission is in D2D or WWAN mode. This parameter adaptation enables the system to optimize performance for each network type without requiring complex real-time calculations.
2Reliability
If transmission power is increased to maintain link quality in interference-prone conditions, then the reliability is improved, but the object-generated harmful factors worsen due to increased interference to other D2D and WWAN communications
Solution Approach 1:
The patent applies local quality by using different power control parameters (P0, alpha) for different transmission conditions - specifically, different parameters for D2D transmissions versus WWAN transmissions. This allows optimization of link quality for each specific communication type while minimizing unnecessary interference to other communications in the respective networks.
Solution Approach 2:
The patent converts the harmful effect of interference into a beneficial selection criterion by using transmission condition detection to determine which power control parameter set to apply. By identifying when interference is likely to occur and selecting appropriate parameters, the system transforms potential interference problems into opportunities for optimized power control.
3Adaptability or versatility
If multiple sets of open-loop power control parameters are maintained and selected based on transmission conditions, then the adaptability is improved for D2D/WWAN coexistence, but the device complexity increases due to additional parameter management requirements
Solution Approach 1:
The patent implements dynamic parameter set selection based on transmission conditions (D2D vs WWAN). The system maintains multiple parameter sets but only activates the one corresponding to the current transmission mode, providing adaptability without requiring complex real-time optimization algorithms.
Solution Approach 2:
The patent segments the power control parameters into distinct sets for different transmission conditions (first set for D2D, second set for WWAN). This segmentation simplifies management by clearly associating each parameter set with its intended transmission type, reducing the complexity of parameter selection and application.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may include memory and at least one processor, coupled to the memory, configured to determine a transmission condition associated with communication over a wireless channel. The processor may be configured to select a set of open-loop power control parameters of at least two sets of open-loop power control parameters based on the transmission condition. The processor may be configured to transmit over the wireless channel with a power based on the selected set of open-loop power control parameters. The apparatus may be a wireless device, such as a user equipment (UE). The open-loop power control parameters may be received from a base station, such as a node B or an evolved Node B (eNB).