NR PDSCH Resource Mapping With LTE CRS Rate-Matching Patterns
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately representing LTE CRS resource element overlap with NR PDSCH resources, which can strain battery life and require inefficient hardware designs.
Innovation Solution
A method is introduced to represent LTE CRS resource element overlap with NR PDSCH resources using fewer resource element patterns, stored in lookup tables, and applied on a resource block or resource element level, optimizing hardware usage and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE CRS resource element overlap is represented using traditional resource element patterns, then communication accuracy is maintained, but hardware complexity and power consumption increase
Solution Approach 1:
The patent segments the LTE CRS resource element overlap into distinct patterns based on their position relative to the NR PDSCH resource blocks. By dividing the overlap regions into manageable segments (patterns A, B, C, D), the system can efficiently represent all possible overlap scenarios using a limited set of predefined patterns, reducing hardware complexity while maintaining accuracy
Solution Approach 2:
The patent pre-defines multiple resource element patterns that cover all possible LTE CRS-NR PDSCH overlap scenarios before actual communication occurs. These predefined patterns are stored in lookup tables and selected based on the specific overlap situation, eliminating the need for complex real-time pattern generation and reducing hardware requirements
2Measurement precision
If LTE CRS rate matching is performed with comprehensive resource element pattern representation, then rate matching accuracy is improved, but power consumption increases
Solution Approach 1:
The patent segments the rate matching process into discrete pattern-based operations rather than requiring continuous complex calculations. By dividing the resource element overlap into standardized segments (patterns A, B, C, D), the UE can efficiently determine the correct pattern and apply pre-computed rate matching parameters, reducing processing power requirements while maintaining accuracy
Solution Approach 2:
The patent performs preliminary computation of rate matching parameters for all possible overlap patterns and stores them in lookup tables. During actual communication, the UE simply needs to identify the applicable pattern and retrieve the pre-computed parameters, significantly reducing real-time processing power consumption while maintaining comprehensive rate matching accuracy
3Ease of manufacture
If resource element patterns are applied on resource block level, then hardware design consistency is improved, but hardware area requirements increase
Solution Approach 1:
The patent segments the resource block level patterns into more granular resource element level patterns. By using resource element patterns (patterns A, B, C, D) rather than entire resource block patterns, the system achieves finer granularity that simplifies hardware implementation and reduces the area required for pattern storage and processing, while maintaining design consistency through standardized pattern definitions
Data Source
AI summary
This disclosure relates to techniques for performing long term evolution cell specific reference signal rate matching for new radio physical downlink shared channel resource mapping in a wireless communication system. A wireless device may establish a wireless link with a fifth generation new radio cell. Information indicating to perform long term evolution cell specific reference signal rate matching for a physical downlink shared channel for the cell for a long term evolution carrier may be received by the wireless device. A set of rate matching patterns may be selected by the wireless device. Long term evolution cell specific reference signal rate matching for the physical downlink shared channel for the cell may be performed by the wireless device for the long term evolution carrier using the selected set of rate matching patterns.