Terminal Transmission Power Density Regulation via Frequency Band Duplication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communication between a base station and a terminal apparatus becomes unstable when the base station is far from the terminal apparatus, particularly in uplink due to the terminal's lower transmission capability compared to the base station.
Innovation Solution
A terminal apparatus equipped with a determination unit to identify a target for transmission power regulation based on a beacon frame, and a transmission unit that transmits a first frame in one frequency band and a duplicate frame in another frequency band to optimize transmission power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal apparatus transmits in a single frequency band, then the transmission capability is sufficient for nearby communication, but the communication stability deteriorates when the base station is far from the terminal apparatus
Solution Approach 1:
The transmission is segmented into multiple frequency bands. The terminal apparatus transmits the same data packet across multiple frequency bands simultaneously, dividing the transmission task across different spectral resources to improve reliability when the base station is far away
Solution Approach 2:
The patent introduces frequency band diversity as an additional dimension for transmission. Instead of relying solely on spatial or temporal dimensions, the system utilizes the frequency dimension by transmitting duplicate packets across multiple frequency bands, thereby improving communication stability without significantly increasing device complexity
2Reliability
If the terminal apparatus increases transmission power to compensate for distance, then the communication stability improves, but the transmission power density regulation compliance deteriorates
Solution Approach 1:
The total transmission power is segmented and distributed across multiple frequency bands. Instead of concentrating high power in a single band (which would violate power density regulations), the same data is transmitted with lower power across multiple bands, achieving the same reliability through power distribution
Solution Approach 2:
The system changes the frequency band parameter by transmitting across multiple bands rather than one. This parameter change allows the terminal to comply with power density regulations in each band while maintaining overall communication stability through the combined effect of multiple frequency transmissions
3Reliability
If the terminal apparatus transmits duplicate frames in multiple frequency bands, then the communication stability improves in far-distance scenarios, but the transmission power density increases
Solution Approach 1:
The transmission power is segmented across multiple frequency bands. Each band carries a duplicate of the same data packet but with lower individual power levels. The segmentation of power across frequency bands achieves the desired communication stability without exceeding power density limits in any single band
Data Source
AI summary
A terminal apparatus includes a determination unit and a transmission unit. The determination unit determines a target of transmission power regulation based on a beacon frame. The transmission unit, in a case where it is determined that the target of regulation is not a transmission power density, transmits a first frame in a first frequency band, and in a case where it is determined that the target of regulation is a transmission power density, transmits a second frame which is a duplicate of the first frame in a second frequency band while transmitting the first frame in the first frequency band.