LTE Measurement Offset Configuration for RRH Detection
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Solution Overview
Problem
Current methods for intercell coordinated communication in LTE-Advanced systems are inefficient as they prioritize reporting reference signal received power values from macrocells over RRHs with lower transmission power, leading to suboptimal communication during unlink scenarios.
Innovation Solution
A communication system and method that enable channel state information reference signal measurements for both uplink and downlink intercell coordinated communication by configuring measurement offsets and report configurations to prioritize RRHs near the mobile station, allowing for efficient detection and reporting of channel state information across different cell types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signal received power values are reported based on transmission power strength, then macrocells with high transmission power are prioritized, but RRHs with low transmission power near the mobile station are not properly detected
Solution Approach 1:
The patent applies local quality by introducing cell-specific measurement offsets that differ between macrocells and RRHs. Macrocells are configured with a first measurement offset while RRHs are configured with a second measurement offset, allowing each cell type to be measured with appropriate compensation for its transmission characteristics. This enables the mobile station to properly detect and report both macrocells and RRHs despite their different transmission power levels.
2Reliability
If measurement offsets are configured to prioritize macrocells, then macrocell signal quality is accurately measured, but RRHs are excluded from reporting
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting measurement offsets based on cell type and communication scenario. Different measurement offsets are configured for macrocells and RRHs, and these offsets can be adjusted according to whether the system is operating in link or unlink scenarios. This allows the system to prioritize macrocells when needed while still enabling RRH detection and reporting for coordinated communication optimization.
3Device complexity
If a single measurement offset is used for all cells, then configuration is simple, but both macrocells and RRHs cannot be optimized simultaneously
Solution Approach 1:
The patent applies segmentation by dividing the measurement offset configuration into separate offsets for different cell types. Instead of using a single universal offset, the system configures a first measurement offset for macrocells and a second measurement offset for RRHs. This segmentation allows each cell type to be measured with precision while keeping the configuration manageable through systematic organization.
Data Source
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AI summary
A base station apparatus configures, for each of configurations for channel state information reference signals included in a measurement configuration, a measurement offset to offset a result of measurement using the channel state information reference signal, based on the purpose of measurement. A mobile station apparatus adds the corresponding measurement offset included in the measurement configuration to a result of measuring each of the channel state information reference signals and judges whether a condition of a report configuration is satisfied.