Macro Cell ABS Proportion Adjustment for Heterogeneous Network Interference
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Solution Overview
Problem
The Almost Blank Subframe (ABS) utilization rate reported by micro cells to macro cells in heterogeneous networks does not accurately reflect the actual utilization rate, leading to inefficient interference management in traditional macro cell networks.
Innovation Solution
A method where the macro cell receives the number of interfered UEs and ABS utilization rate from micro cells, adjusts the ABS proportion based on load information, including GBR PRB and GBR DL PRB utilization rates, to dynamically optimize ABS subframe allocation, ensuring accurate interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If micro cells allocate ABS subframe resources to non-interfered UEs when resources are redundant, then PRB utilization rate improves, but ABS subframe utilization rate reporting becomes inaccurate
Solution Approach 1:
The patent implements a feedback mechanism where macro cells collect ABS utilization rate reports from micro cells, verify their accuracy by comparing with actual interfered UE information, and provide corrective feedback to adjust future reporting. This ensures accurate information flow for dynamic ABS proportion adjustment while allowing flexible resource allocation.
Solution Approach 2:
The patent introduces an intermediary verification layer at the macro cell level that mediates between micro cell resource allocation decisions and the accuracy of utilization rate reporting. The macro cell acts as an intermediary to collect, verify, and reconcile the reported utilization rates with actual interference conditions, ensuring system-wide optimization.
2Reliability
If ABS proportion is increased to protect interfered UEs, then interference reduction effectiveness improves, but resource waste increases when no interfered UEs exist
Solution Approach 1:
The patent implements dynamic ABS proportion adjustment where macro cells continuously monitor the number of interfered UEs and ABS utilization rates from micro cells, and dynamically adjust the ABS proportion in real-time. This allows the system to increase ABS protection when interfered UEs are present and reduce or eliminate ABS when no interfered UEs exist, optimizing resource utilization while maintaining protection effectiveness.
Solution Approach 2:
The patent changes the ABS proportion parameter dynamically based on actual network conditions. Macro cells adjust this parameter according to the reported number of interfered UEs and ABS utilization rates, transitioning between different operational states (high protection mode when interfered UEs exist, low protection mode when they don't) to balance reliability and resource efficiency.
3Productivity
If ABS subframe resources are allocated to non-interfered UEs, then resource utilization improves, but interference management accuracy deteriorates
Solution Approach 1:
The patent segments the ABS subframe resource allocation into two distinct parts: protected resources reserved for interfered UEs and non-protected resources available for non-interfered UEs. This segmentation allows micro cells to allocate non-protected resources flexibly to improve utilization while maintaining accurate tracking of protected resource usage for interference management purposes.
Solution Approach 2:
The patent applies different quality requirements to different portions of ABS subframe resources. Protected resources maintain strict interference management characteristics, while non-protected resources allow flexible allocation for improved utilization. This local quality differentiation enables simultaneous optimization of both resource utilization and interference management accuracy.
Data Source
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AI summary
An interference adjustment processing method and device are provided. In the interference adjustment processing method, a macro cell receives the number of interfered UEs and an Almost Blank Subframe (ABS) utilization rate from a micro cell in a coverage of the macro cell; and the macro cell adjusts an ABS proportion according to load information of the macro cell, the number of the interfered UEs under the micro cell and the ABS utilization rate, wherein the load information comprises a Guaranteed Bit Rate Physical Resource Block (GBR PRB) utilization rate and a Guaranteed Bit Rate Downlink Physical Resource Block (GBR DL PRB) utilization rate, and the ABS proportion is a ratio of the number of ABSs in an ABS pattern period to a total number of downlink subframes in the ABS pattern period. The technical scheme solves the problem in the related art that the ABS subframe utilization rate reported by the micro cell to the macro cell cannot truly reflect the actual ABS utilization rate. The macro cell is enabled to provide an accurate ABS proportion for micro cells in the coverage of the macro cell.