OaM Node Protected Subframe Pattern Configuration
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Solution Overview
Problem
Current methods for inter-cell interference reduction in heterogeneous wireless networks, such as Almost Blank Subframes (ABS) and Reduced Power Subframes (RPSFs, lack configuration control and feedback mechanisms, leading to inefficiencies in interference management, particularly in scenarios where multiple cells are involved.
Innovation Solution
An Operations and Maintenance (OaM) node configures protected subframe patterns for base stations to reduce interference by determining the usage fraction or percentage of protected subframes and converting this information into specific patterns for ABS and RPSF configurations, using feedback information to optimize interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If protected subframes (ABS/RPSF) are used to reduce inter-cell interference, then interference reduction is achieved, but configuration control and feedback mechanisms are lacking leading to inefficiencies
Solution Approach 1:
The patent introduces a feedback mechanism where the OaM node receives feedback information from base stations about interference conditions and usage effectiveness, then adjusts the fraction of protected subframes accordingly. This closed-loop feedback system enables dynamic optimization of interference reduction while maintaining efficient configuration control.
Solution Approach 2:
The patent changes the configuration parameter from fixed protected subframe patterns to a dynamic fraction/percentage that can be adjusted by the OaM node based on network conditions. This parameter change allows flexible control of protected subframe usage to optimize interference reduction efficiency.
2Productivity
If multiple cells use protected subframes independently, then each cell can reduce its own interference, but consistency and effectiveness across cells deteriorate
Solution Approach 1:
The patent merges the configuration control of protected subframes from individual cell level to network level by introducing a centralized OaM node. This OaM node coordinates protected subframe patterns across multiple cells, ensuring consistency and effectiveness while maintaining overall interference reduction efficiency.
Solution Approach 2:
The OaM node serves multiple functions: it configures protected subframes for interference reduction, receives feedback from multiple base stations, and adjusts configurations across the entire network. This universal control mechanism ensures consistent protected subframe usage across all cells while optimizing overall network performance.
3Object-affected harmful factors
If the fraction of protected subframes is increased, then interference reduction improves, but downlink and uplink throughput may deteriorate due to reduced resource availability
Solution Approach 1:
The patent makes the protected subframe configuration dynamic by allowing the OaM node to adjust the fraction of protected subframes based on real-time feedback information about interference conditions and throughput performance. This dynamic adjustment optimizes the balance between interference reduction and resource availability.
Solution Approach 2:
The feedback mechanism allows the system to monitor both interference levels and throughput performance, enabling the OaM node to adjust the protected subframe fraction to achieve optimal balance. When throughput degrades, the system can reduce protected subframe usage; when interference is high, it can increase protection.
Data Source
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AI summary
A cellular radio communications network includes base stations that provide radio communication service to user equipments (UEs) in respective cell service areas. A node receives or determines a usage fraction or percentage of protected subframes and converts the fraction or percentage of protected subframes into one or more protected subframe patterns for an aggressor base station to not transmit on or to transmit at reduced power, in one example, an operations and maintenance (OaM) node configures one or more interfered base stations to use the one or more protected subframe patterns, in another example, the node is a base station.