Inter-cell Load Balance Reserve Area Configuration in Heterogeneous Networks
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Solution Overview
Problem
In heterogeneous mobile communication systems, the integration of macro and small cells faces challenges in effectively managing user equipment and achieving load balance, leading to inefficient resource allocation and degraded wireless channel quality due to interference from macro cells.
Innovation Solution
The implementation of a method and apparatus for inter-cell load balance, where a first base station configures a reserve area for a second base station and controls inter-base station load balance, utilizing measurement report configuration messages to determine user equipment entry or exit from the reserve area, and employing techniques like almost blank subframes and resource restriction to optimize channel quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If macro cells and small cells share the same frequency to increase network capacity, then data service speed is improved, but interference between cells increases and wireless channel quality deteriorates
Solution Approach 1:
The patent segments the network into macro cells and small cells with distinct functional roles. Macro cells provide wide-area coverage while small cells provide high-capacity data services in hotspots. This segmentation allows frequency reuse across cells while managing interference through hierarchical control and selective activation based on user density and service requirements.
Solution Approach 2:
The patent applies local quality by configuring small cells with enhanced data service capabilities in specific high-traffic areas while macro cells maintain voice and data services across broader regions. Resource allocation, power levels, and antenna configurations are optimized locally for each cell type's specific function and coverage requirements.
2Productivity
If load balance control is implemented between base stations, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring small cells in anticipated high-traffic locations and pre-establishing load balance policies and handover thresholds. Measurement report configurations and reserve area parameters are set in advance, allowing the system to reactively activate load balancing only when needed rather than continuously managing all parameters.
Solution Approach 2:
The patent employs feedback mechanisms where user equipment provides measurement reports about signal quality and cell conditions. Base stations use this feedback to dynamically adjust load balance decisions, handover thresholds, and resource allocation. The feedback loop enables adaptive resource management without requiring complex centralized control.
3Measurement precision
If measurement report configuration is used to detect reserve area entry/exit, then handover accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by configuring measurement reports only for specific events (A3, A5) and specific neighbor cells that are relevant to load balance decisions. Not all possible measurements are requested; only those necessary for detecting reserve area entry/exit and triggering handovers. This reduces signaling overhead while maintaining handover accuracy for critical scenarios.
Data Source
AI summary
A method and an apparatus for an inter-cell load balance in a wireless communication system are provided. The method of an inter-cell load balance of a first base station in a heterogeneous network wireless communication system including the first base station and a second base station includes configuring a first reserve area for the second base station, for the inter-cell load balance and controlling an inter-base station load balance according to the first reserve area.