Resource Block Mapping for Repetitive Data Symbols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, data symbols with repetition experience reduced diversity when mapped onto physical resource blocks, leading to decreased Block Error Rate (BLER) and system performance due to insufficient frequency and time diversity.
Innovation Solution
Subdividing data symbols into groups with original and repeated portions, then mapping these groups into different physical resource blocks to increase diversity, ensuring a predefined level of separation between original and repeated symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data symbols with repetition are mapped onto physical resource blocks using conventional mapping methods, then the mapping process is simple, but the diversity level between original and repeated symbols is reduced leading to decreased system performance
Solution Approach 1:
The patent segments the data symbols into distinct groups: original data symbols and repeated data symbols. This segmentation allows the mapping process to treat these symbol types differently, ensuring that repeated symbols are mapped to physical resource blocks that provide sufficient diversity relative to their corresponding original symbols, thereby improving reliability without excessive complexity
Solution Approach 2:
The patent introduces a new dimension to the mapping process by considering the relationship between original and repeated symbols across multiple resource blocks. Instead of simple sequential mapping, the invention maps symbols considering their positional relationships in time and frequency domains, ensuring that repeated symbols achieve the required diversity level by being mapped to resource blocks that are sufficiently separated in at least one dimension
2Reliability
If original and repeated data symbols are mapped to the same or adjacent physical resource blocks, then resource utilization is efficient, but frequency and time diversity is insufficient leading to increased Block Error Rate
Solution Approach 1:
The patent applies local quality by differentiating the mapping strategy for original symbols versus repeated symbols. While maintaining overall resource efficiency, the mapping process ensures that repeated symbols are allocated to physical resource blocks with specific local characteristics (sufficient frequency and/or time separation from original symbols), thereby achieving the required diversity to reduce Block Error Rate without excessive resource consumption
Data Source
AI summary
In a mobile communication system with uncorrelated channel characteristics, transmission using modulation of data symbols with repetition can improve the performance. However, mapping of the original and the repeated symbols into the physical resources may on the other hand reduce a desired level of diversity when the original and the corresponding repeated symbols map on the physical resources close to each other. The present invention provides a method for transmission, a transmitter, a method for receiving, and a receiver capable of efficiently transmit/receive data symbols with an increased level of diversity. This is achieved by grouping of portions of the original and the corresponding data symbols and by mapping the portions of the original and the corresponding data symbols into the different physical resource blocks.