Reference Signal Resource Mapping Diagram for LTE Antenna Port Support
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Solution Overview
Problem
The existing LTE R10 downlink system cannot support the increased number of antenna ports required by the LTE R13 standard, leading to an inability to provide a resource mapping diagram for reference signals, which prevents UE from performing channel measurements.
Innovation Solution
A method where the UE obtains a reference signal resource mapping diagram that associates multiple second reference signal resource mapping diagrams with first reference signal resource mapping diagrams, allowing channel measurements to be performed without interfering with downlink data transmission by not occupying resources used for data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station sends reference signals using more antenna configurations to improve spectrum efficiency, then the quantity of antenna ports increases, but the existing LTE R10 system cannot support more than eight antenna ports
Solution Approach 1:
The patent segments the reference signal resource mapping into multiple types (first type for ports 0-7, second type for ports 8-15). Each type handles a specific range of antenna ports, allowing the system to support up to 16 ports by combining multiple segmented mappings rather than requiring a single complex mapping structure.
Solution Approach 2:
The patent introduces a new dimension of resource mapping by defining separate first-type and second-type resource mapping diagrams. This dimensional extension allows the system to accommodate additional antenna ports beyond the traditional eight-port limitation without disrupting existing R10 operations.
2Measurement precision
If the UE obtains reference signal according to base station indication and performs channel measurement, then channel measurement can be performed, but RE used to carry data is occupied causing interference to downlink data transmission
Solution Approach 1:
The patent extracts reference signal resources from data-carrying REs by defining specific resource mapping patterns for reference signals. The first-type and second-type resource mappings allocate dedicated REs for reference signals, separating them from data transmission resources and eliminating the interference problem.
Solution Approach 2:
The patent introduces resource mapping diagrams as an intermediary structure that mediates between the base station's reference signal transmission and the UE's channel measurement. These mapping diagrams provide a structured framework that coordinates resource allocation, ensuring reference signals and data occupy different REs without direct conflict.
Data Source
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AI summary
The present invention relates to the communications field, and provides a channel measurement method, a base station, and UE, to perform channel measurement without affecting downlink data transmission. The method includes: obtaining, by UE, a reference signal resource mapping diagram, and obtaining a reference signal according to the reference signal resource mapping diagram; performing, by the UE, channel measurement according to the reference signal to determine channel state information, and feeding back the channel state information to a base station, where the reference signal resource mapping diagram is a location to which a time-frequency resource of the reference signal is mapped, the reference signal resource mapping diagram is a first reference signal resource mapping diagram or a second reference signal resource mapping diagram, and an association relationship exists between each of K2 second reference signal resource mapping diagrams and at least one of K1 first reference signal resource mapping diagrams.