Radio Unit Signal Coordination in Overlapping Coverage Areas
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Solution Overview
Problem
Distributed antenna systems face limitations in maximizing system capacity and efficiently using radio resources, particularly in overlapping service areas where user equipment receives low-quality signals.
Innovation Solution
A method for controlling signal transmission in multiple radio units by determining signal quality measurements and allocating the same channel for simultaneous data signal transmission when the difference in signal quality is below a threshold, allowing user equipment to combine signals and improve reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed antenna system is used to reduce coverage holes, then coverage is improved, but system capacity is limited
Solution Approach 1:
The patent merges multiple radio units by enabling them to simultaneously transmit the same data signal through the same channel to user equipment in overlapping service areas. This coordination combines the coverage advantages of distributed antennas with enhanced system capacity through cooperative transmission.
Solution Approach 2:
The system uses feedback mechanisms where radio units measure signal quality and report to the digital unit, which then determines optimal transmission coordination. This feedback loop enables dynamic adjustment of transmission strategies to maximize both coverage and capacity.
2Productivity
If multiple radio units transmit different data signals, then system capacity is maximized, but signal quality in overlapping areas deteriorates
Solution Approach 1:
The system dynamically adjusts transmission strategies based on real-time signal quality measurements. In overlapping service areas, radio units coordinate to transmit the same signal, while in non-overlapping areas they can transmit different signals to maximize capacity, creating a dynamic transmission pattern.
Solution Approach 2:
The patent applies different transmission strategies to different spatial regions. In overlapping service areas, coordinated same-signal transmission improves local signal quality, while in non-overlapping areas independent transmission maximizes overall system capacity.
3Device complexity
If radio units operate independently, then device complexity is reduced, but radio resource efficiency deteriorates
Solution Approach 1:
The digital unit performs multiple functions including signal quality measurement, coordination decision-making, and transmission control for multiple radio units. This centralized multi-functional approach improves radio resource efficiency without significantly increasing overall system complexity.
Data Source
AI summary
Described embodiments provide controlling signal transmission in a plurality of radio units. The plurality of radio units may be coupled to a digital unit. The digital unit may be spatially separated from the plurality of radio units. Signal quality measurements may be received from multiple radio units when a user equipment is located within an overlapping service area of the multiple radio units. Determination may be made as to whether to simultaneously use at least two of the multiple radio units to transmit a data signal to the user equipment based on the received signal quality measurements. At least two of the multiple radio units may be controlled to transmit a same data signal to the user equipment using a same channel based on the determination result.