UE-Specific Reference Signal Scrambling for Control Channel Interference
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting user equipment (UE)-specific reference signals for control channels, particularly in legacy data regions, which affects channel management and interference reduction in multi-node environments.
Innovation Solution
The method involves generating and transmitting multiple control channels with distinct UE-specific reference signals, using different scrambling identifiers, and interleaving these signals for efficient allocation in specific resource regions, allowing for cell-specific, node-specific, or UE-specific configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control channels are transmitted to the same resource region, then channel management capability is improved, but interference between channels increases
Solution Approach 1:
The patent applies different scrambling identifiers to different control channels transmitted in the same resource region. This creates local differentiation (each channel has unique scrambling properties) while maintaining overall system coordination, thereby enabling multiple channels to coexist without mutual interference.
Solution Approach 2:
The patent changes the scrambling identifier parameter for each control channel. By modifying this specific parameter, the system enables multiple control channels to be distinguished and managed independently in the same resource region, improving channel management capability while preventing interference through parameter differentiation.
2Reliability
If UE-specific reference signals are transmitted in legacy data regions, then reference signal functionality is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the legacy data region into specific resource elements for UE-specific reference signals. By identifying and designating particular resource elements within the legacy data region, the system enables reference signal transmission without requiring complete restructuring of resource allocation, thus improving functionality while managing complexity through selective segmentation.
3Measurement precision
If different scrambling identifiers are applied to reference signals, then channel differentiation is improved, but signal processing complexity increases
Solution Approach 1:
The patent changes the scrambling identifier parameter to achieve channel differentiation. By modifying this specific parameter rather than fundamentally changing the signal structure, the system enables precise channel identification and differentiation while keeping signal processing complexity manageable through parameter-based differentiation rather than structural complexity.
Data Source
AI summary
The present invention relates to a method for transmitting a terminal-specific reference signal for a control signal by a base station in a wireless communication system. Specifically, the method is characterized in that it comprises: transmitting a plurality of control channels and a first terminal-specific reference signal for the plurality of control channels to a first resource region; and transmitting one control channel and a second terminal-specific reference signal for the control channel to a second resource region, wherein the different descrambling identifiers are applied to the first and second terminal-specific reference signals.