Radio Base Station Load-Based Interference Control
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Solution Overview
Problem
In heterogeneous radio communication systems with varying base station loads, controlling uplink interference based solely on neighboring cell interference power can lead to unnecessary reduction of transmission power, thereby reducing the overall communication capacity.
Innovation Solution
A radio base station that controls the transmission of interference information based on its own communication load, transmitting this information only when the load is above a threshold and stopping transmission when the load is below it, to prevent unnecessary power reduction and maintain system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If base stations transmit OI information based solely on uplink interference power from neighboring cells, then interference control is simplified, but base stations with very low traffic cause unnecessary transmission power reduction in neighboring cells, reducing overall communication capacity
Solution Approach 1:
The patent changes the parameters used for OI transmission decision from only interference power to a combination of interference power and communication load. By introducing load as an additional parameter, the system determines whether to transmit OI based on both the interference level and the base station's current traffic conditions, preventing unnecessary power reduction when load is low
Solution Approach 2:
The patent makes the OI transmission behavior dynamic by continuously monitoring the base station's communication load and adjusting transmission decisions accordingly. When load exceeds a threshold, OI transmission is enabled; when load is below the threshold, transmission is suspended. This dynamic adaptation prevents rigid interference control that would harm overall capacity
2Reliability
If base stations continuously transmit interference information, then neighboring base stations can maintain optimal interference control, but system overhead and unnecessary power reduction increase, reducing overall efficiency
Solution Approach 1:
Instead of continuous OI transmission, the patent implements periodic transmission based on load conditions. The base station periodically evaluates its load and only transmits OI during periods when load exceeds the threshold, creating an on-demand periodic transmission pattern that reduces unnecessary energy consumption while maintaining control reliability when needed
Data Source
AI summary
A first radio base station (1A) calculates a traffic amount ratio in the first radio base station (1A). Further, when the traffic amount ratio is equal to or greater than a threshold value, the first radio base station (1A) controls to transmit interference information. Under this control, the first radio base station (1A) performs a measurement of interference power, a generation of the interference information and the transmission of the interference information to a second radio base station (1B). On the other hand, when the traffic amount ratio is less than the threshold value, the first radio base station (1A) controls to halt the transmission of the interference information. Under this control, the first radio base station (1A) performs none of the measurement of interference power, the generation of the interference information and the transmission of the interference information to the second radio base station (1B).