Reference Signal Positioning for Extension Carriers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication networks face challenges in optimizing transmission performance between a core network and user equipment over extension carriers and carrier segments, due to suboptimal positioning of reference signals.
Innovation Solution
The method involves positioning reference signals in various locations within resource elements of an extension carrier and/or carrier segment, allowing for optimized transmission performance by selecting specific resource elements for demodulation reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If signaling schemes for primary carrier are employed for extension carrier, then device complexity is reduced, but transmission performance deteriorates
Solution Approach 1:
The patent applies local quality by positioning demodulation reference signals at specific resource elements within extension carriers and carrier segments rather than uniformly across all carriers. This localized approach optimizes channel estimation performance in specific frequency-time regions where it is most needed, while maintaining simpler signaling elsewhere. The reference signals are placed in resource elements that are strategically selected based on channel conditions and interference patterns, achieving better transmission performance without uniformly increasing complexity across the entire system.
2Reliability
If reference signals are positioned in optimal locations, then transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent segments the extension carrier into carrier segments and positions reference signals within specific resource elements of these segments. This segmentation allows the system to optimize reference signal placement in manageable units rather than treating the entire extension carrier as a single entity. Each carrier segment can have its reference signals positioned independently based on local channel conditions, reducing the overall complexity of reference signal management while improving transmission performance through localized optimization.
Solution Approach 2:
The patent changes the positional parameters of demodulation reference signals within resource elements of extension carriers and carrier segments. By adjusting the time-frequency location parameters of these reference signals, the system optimizes channel estimation accuracy for different channel conditions. The reference signals can be positioned at different resource elements depending on the specific carrier configuration, bandwidth, and channel characteristics, achieving performance improvement through parameter optimization without fundamental system redesign.
Data Source
AI summary
Reference signals configured for use with extension carriers and/or carrier segments are described. Reference signals for extension carriers and/or carrier segments may include demodulation reference signals (e.g., user equipment-specific reference signals), cell-specific reference signals, and channel-state information reference signals. Methods, systems and apparatuses for configuring extension carriers and/or carrier segments with one or more of the reference signals (e.g., positioning one or more reference signal symbols in extension carriers and/or carrier segments) are described.