Wireless Transmission Power Control With Distance-Based Propagation Models
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Solution Overview
Problem
Existing methods do not efficiently determine transmission power values by changing radio wave propagation models based on the distance between wireless devices, leading to increased processing load and delay.
Innovation Solution
A method involving generating areas with allocated transmission power values using multiple radio wave propagation models, determining valid models based on distance, and calculating transmission power values for secondary wireless devices within these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radio wave propagation models are used to determine transmission power values, then accuracy of transmission power determination is improved, but processing load and delay increase
Solution Approach 1:
The space around the first wireless device is segmented into multiple areas based on distance ranges. Each area is associated with a specific radio wave propagation model. This segmentation allows the system to use only one model at a time based on the second device's location, achieving accurate transmission power determination without the need to process all models simultaneously, thus reducing processing load and delay.
Solution Approach 2:
Different radio wave propagation models are assigned to different spatial areas (local regions) based on distance from the first wireless device. The system selects the appropriate model based on which area the second device falls into. This local quality approach ensures that the most suitable model is used for each specific scenario, improving accuracy while avoiding the computational overhead of evaluating all models globally.
2Measurement precision
If radio wave propagation models are changed based on separation distance, then transmission power determination accuracy is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-defining multiple areas with predetermined distance ranges from the first wireless device. Each area is pre-associated with a specific radio wave propagation model. When determining transmission power, the system only needs to check which pre-defined area the second device falls into and apply the corresponding model, rather than dynamically selecting among multiple models. This preliminary organization reduces system complexity while maintaining accurate transmission power determination.
Data Source
AI summary
A method includes generating a plurality of areas to which one of a plurality of transmission power values is allocated on the basis of at least the location of a first wireless device, the plurality of transmission power values, and a plurality of radio wave propagation models; and determining a transmission power value of a second wireless device on the basis of a transmission power value allocated to an area that does not include the location of the second wireless device. The generating includes calculating an area candidate using one of the plurality of radio wave propagation models, confirming validity of the used radio wave propagation model on the basis of a distance between a boundary of the area candidate and the first wireless device, and calculating another area candidate by using another radio wave propagation model in a case where the used radio wave propagation model is invalid.