Dynamic Beam Measurement for Interference Coordination
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Solution Overview
Problem
The semi-static configuration of Further Enhanced Inter-Cell Interference Coordination (feICIC) in 3GPP networks leads to sub-optimal use of radio spectrum due to slow operation and stochastic mobility patterns, resulting in wasted radio communication resources, especially when ABS subframes are respected in the absence of inter-cell interference.
Innovation Solution
Implementing a system where mobile communication devices and base stations can dynamically measure and report signal interference across multiple beamformed regions, allowing for more precise configuration of transmission patterns and reducing unnecessary muting of signals during ABS subframes, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static feICIC configuration is used to coordinate interference between macro and pico cells, then interference management is simplified, but radio resource utilization becomes sub-optimal due to slow adaptation to stochastic mobility patterns
Solution Approach 1:
The patent transitions from semi-static ABS pattern configuration to dynamic beam-specific interference coordination. Base stations continuously adjust transmission parameters based on real-time channel conditions and mobility patterns, allowing the system to adapt rapidly to changing traffic demands and user movements while maintaining interference coordination.
Solution Approach 2:
The patent changes multiple parameters simultaneously including beamforming weights, transmission power levels, and resource allocation patterns based on measured channel state information. This multi-parameter optimization enables fine-grained control over interference while maximizing spectral efficiency in heterogeneous networks.
2Reliability
If ABS subframes are configured to reduce macro-to-pico cell interference, then pico cell users experience improved signal quality, but macro cell spectral efficiency decreases due to unnecessary muting when interference is not present
Solution Approach 1:
The patent applies beamforming to create spatially selective transmission patterns where interference suppression is applied only in specific directional beams affecting pico cell users, while other beams continue normal transmission. This localized interference management preserves macro cell capacity in non-interfering directions.
Solution Approach 2:
The patent implements continuous feedback loops where pico cell users report received signal strength and interference levels, enabling the macro base station to dynamically adjust beamforming patterns and transmission power only when and where interference occurs, rather than applying blanket muting across all subframes.
3Productivity
If beamforming is applied in heterogeneous networks with macro and pico cells, then spectral efficiency increases through spatial multiplexing, but interference coordination becomes more complex due to multiple beamformed regions
Solution Approach 1:
The patent segments the network into distinct beamformed regions with dedicated coordination mechanisms. Each beam is treated as an independent spatial channel with its own interference management parameters, allowing granular control over interference while maintaining overall system efficiency through modular coordination.
Data Source
AI summary
A communication system is disclosed in which a serving base station configures a mobile device for performing measurements with respect to signals transmitted by a neighbour base station. The serving base station obtains a measurement report from the mobile device, the measurement report comprising a result of signal measurements in association with information identifying a beamformed region in which a signal to which said result of said signal measurements relates was transmitted.