Millimeter-Wave Downlink Resource Limiting for Uniform Cell Quality
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Solution Overview
Problem
The millimeter-wave band exhibits varying radio wave propagation characteristics, leading to potential traffic concentration on specific frequency resources, which is undesirable for efficient resource utilization.
Innovation Solution
A mechanism is provided to improve downlink quality in small cells by limiting resources used for downlink transmission, including processes such as bandwidth reduction, CC deactivation, and beam reduction to enhance quality uniformity among frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If all frequency bands in the millimeter-wave band are utilized for downlink transmission, then the quantity of available radio resources increases, but traffic concentration occurs on specific frequency resources due to varying propagation characteristics
Solution Approach 1:
The patent applies local quality by differentiating resource allocation across different frequency bands. Specifically, it identifies that certain frequency bands (e.g., 28 GHz) have better propagation characteristics and higher received power than others (e.g., 38 GHz), and accordingly allocates different resource quantities to each band. This ensures that each frequency band operates at its optimal capacity without causing traffic concentration, thereby maintaining uniform traffic distribution while maximizing total resource utilization.
2Reliability
If resources are limited to improve downlink quality in specific frequency bands, then quality uniformity among component carriers improves, but the quantity of available resources for downlink transmission decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting resource allocation parameters based on measured propagation characteristics. The base station measures received power across different frequency bands, identifies bands with significant quality differences, and then modifies resource allocation parameters (such as bandwidth, power distribution, or number of resource blocks) to equalize downlink quality. This ensures that all component carriers maintain uniform quality levels while maximizing the total quantity of downlink resources utilized across the millimeter-wave spectrum.
Data Source
AI summary
An apparatus comprises processing circuitry configured to communicate with a base station using a millimeter-wave frequency band; receive a reference signal transmitted from the bases station; measure, based on the reference signal, a serving cell quality; and trigger a report in a case that a criterion for the serving cell quality is met. The criterion includes an offset value with a predetermined value for the millimeter-wave frequency band.