Radio Base Station Frequency Band Allocation
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Solution Overview
Problem
The increased use of multiple frequency bands in radio sites to meet high traffic demand leads to higher power consumption, both absolutely and per served mobile device, due to the higher power requirements of higher frequency bands.
Innovation Solution
A method and device for a radio base station to estimate power consumption across frequency bands, reallocate mobile devices from higher-frequency bands to lower-frequency bands while maintaining power headroom limits, and potentially turning off unused carrier signals to reduce overall power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional and higher frequency bands are added to increase capacity, then the number of users and bandwidth increase, but power consumption of base station increases both absolutely and per served mobile device
Solution Approach 1:
The patent applies dynamic allocation of mobile devices to frequency bands based on real-time power consumption estimates. The base station continuously monitors power usage and reallocates devices between frequency bands dynamically, rather than using static allocation. This allows the system to adapt to changing conditions and optimize power consumption while maintaining service capacity.
Solution Approach 2:
The patent changes the allocation parameter from fixed to variable based on power consumption characteristics. By estimating power consumption for each frequency band and adjusting device allocation accordingly, the system transforms the frequency band assignment from a static configuration to a dynamic parameter that responds to power consumption conditions, thereby reducing overall power usage while maintaining capacity.
2Use of energy by moving object
If mobile devices are reallocated from higher-frequency bands to lower-frequency bands, then total power consumption decreases, but radio traffic capacity of the target band may be exceeded
Solution Approach 1:
The patent implements a feedback mechanism where the base station estimates power consumption for each frequency band, evaluates the impact of potential reallocations on both power consumption and radio traffic capacity, and adjusts allocations accordingly. This closed-loop control ensures that reallocations reduce power consumption without exceeding the radio traffic capacity limits of target bands.
Solution Approach 2:
The patent performs preliminary evaluation of power consumption and capacity constraints before executing reallocation decisions. By estimating power consumption and assessing radio traffic capacity in advance, the system prevents capacity violations while achieving power optimization, rather than reacting after constraints are breached.
Data Source
AI summary
The present disclosure relates to a method of controlling allocation of mobile devices (12-23) to frequency bands in a radio site (10), and a device (11) performing the method. In an aspect, a method of a radio base station (11) of controlling allocation of mobile devices (12-23) to frequency bands in a radio site (10) is provided. The method comprises estimating (S101) power consumption of the radio base station (11) caused by radio traffic of the mobile devices (12-23) in each frequency band of the radio site (10), determining (S102) whether or not power consumption of the radio base station (11) is decreased by reallocating at least one of the mobile devices (12-23) from one frequency band to another frequency band, while not exceeding a power headroom limit of said another frequency band, and if so reallocating (S103) said at least one mobile device from said one frequency band to said another frequency band.