Serving Cell Power Allocation Across Bands for Coverage Gain
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Solution Overview
Problem
The challenge of improving coverage in wireless communication networks, particularly in rural areas with large inter-site distances, is limited by the cost and performance constraints of active antenna units (AAUs), which restrict continuous power increases, leading to insufficient signal coverage and user churn.
Innovation Solution
A power adjustment method involving a base station that broadcasts a message to configure a center bandwidth for measurement, reduces power in a second bandwidth, increases power in the center bandwidth, identifies terminals that do not support this configuration, and compensates measurement values to prevent ping-pong handovers, ensuring stable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power of active antenna units is increased to improve coverage, then signal coverage is improved, but device cost and power consumption increase
Solution Approach 1:
The patent applies local quality by differentiating power allocation across different frequency bands. Instead of uniformly increasing power across all bands, the method identifies and selectively increases power only in the center bandwidth where measurement and coverage improvement are most critical, while maintaining or reducing power in other bandwidths. This localized power optimization resolves the contradiction by improving coverage in critical areas without proportionally increasing overall power consumption.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting power allocation parameters across different frequency bands based on terminal measurement capabilities and channel conditions. The base station modifies power distribution parameters (power offset values) for center bandwidth versus other bandwidths, transforming a static power allocation into a dynamic, condition-based allocation that improves coverage where needed while controlling overall power consumption.
2Area of stationary object
If power allocation is optimized to improve coverage, then coverage performance is improved, but measurement accuracy for terminals may deteriorate
Solution Approach 1:
The patent implements feedback by establishing a closed-loop measurement and compensation mechanism. Terminals measure channel quality on both center bandwidth and other bandwidths, and the base station uses these measurement results to calculate and apply appropriate compensation values. This feedback loop ensures that even with differential power allocation, the terminal receives accurate channel quality information that reflects actual signal conditions, resolving the contradiction between power optimization and measurement accuracy.
Solution Approach 2:
The patent introduces measurement compensation values as an intermediary element that bridges the gap between differential power allocation and accurate channel measurement. These compensation values act as a mediator that adjusts terminal measurements to account for power differences between bandwidths, allowing the system to maintain measurement precision while benefiting from optimized power distribution across different frequency bands.
3Use of energy by stationary object
If differential power allocation is implemented, then power efficiency is improved, but terminal compatibility and connection stability may worsen
Solution Approach 1:
The patent applies partial action by implementing differential power allocation only for specific bandwidths (center bandwidth versus other bandwidths) rather than across the entire frequency spectrum. This partial application of power differentiation allows the system to achieve power efficiency improvements while minimizing disruption to terminal compatibility and connection stability, as not all bandwidths are subjected to aggressive power optimization.
Solution Approach 2:
The patent employs preliminary action by providing advance notification to terminals about differential power allocation through measurement configuration messages. The base station informs terminals about power offset values and measurement bandwidth configurations before actual power allocation changes take effect. This preliminary communication allows terminals to prepare and adapt, preventing connection instability and ensuring smooth operation under differential power allocation.
Data Source
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AI summary
Embodiments of this application disclose a power adjustment method, used to adjust power of a serving cell. The method in embodiments of this application includes: The serving cell sends a first message to a first terminal, where the first message indicates the first terminal to configure a first measurement bandwidth as a center bandwidth, a frequency range of the center bandwidth is less than a frequency range of a full bandwidth, the full bandwidth represents a maximum bandwidth allocated to the serving cell, and the first measurement bandwidth is a bandwidth used by the first terminal to measure channel quality; the serving cell reduces power in a second bandwidth, where a frequency range of the second bandwidth is a frequency range obtained by subtracting the frequency range of the center bandwidth from the frequency range of the full bandwidth; and the serving cell increases power in the center bandwidth. In embodiments of this application, the power in the center bandwidth is increased, so that a coverage of the serving cell is increased.