Reference Signal Grouping for Beam Management Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems using large-scale antenna arrays, the increasing number of antennas leads to higher resource overhead for transmitting quasi-location information and resource mapping indications, which hampers the efficiency of beam management and signal transmission quality.
Innovation Solution
A method involving the transmission of first and second reference signals, where the second reference signals include quasi co-located information indicating correlations between resources, allowing user equipment to determine optimal reception beams, thereby reducing resource overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of antennas in the large-scale antenna array increases to improve signal gain and transmission quality, then the transmission quality of wireless signals is improved, but the resource overhead required to transmit quasi-location information and resource mapping indications increases
Solution Approach 1:
The patent segments the reference signals into multiple groups, where each group corresponds to a specific beam. Instead of providing quasi-location information for all reference signals individually, the system provides quasi-location information at the group level. This segmentation reduces the amount of quasi-location information that needs to be transmitted while maintaining the ability to identify beam directions, thereby reducing resource overhead while preserving transmission quality.
Solution Approach 2:
The patent introduces beam correspondence as an intermediary concept between reference signals and quasi-location information. By establishing that multiple reference signals within a group share the same beam characteristics, the system uses beam-level quasi-location information as a mediator to represent resource mapping for multiple individual reference signals, reducing the total amount of information that must be transmitted.
2Power
If the number of antennas in the large-scale antenna array increases to improve signal gain, then the signal gain is improved, but the resource overhead required for resource mapping indications increases
Solution Approach 1:
The patent divides reference signals into multiple groups, with each group associated with a specific beam. Resource mapping indications are provided at the group level rather than for each individual reference signal. This segmentation approach maintains the high signal gain achieved through large-scale antenna arrays while reducing resource overhead by eliminating redundant resource mapping information across multiple signals within the same beam group.
3Measurement precision
If quasi-location information is transmitted for each reference signal to enable user equipment to determine reception beams, then beam determination accuracy is improved, but the resource overhead increases
Solution Approach 1:
The patent merges multiple reference signals into groups that share common beam characteristics. Instead of transmitting separate quasi-location information for each reference signal, the system transmits a single set of quasi-location information that applies to all reference signals within a group. This merging maintains beam determination accuracy because all signals in a group correspond to the same beam direction, while significantly reducing resource overhead by eliminating redundant information transmission.
Data Source
AI summary
A reference signal transmission and reception method is presented. The transmission method includes: transmitting a plurality of first reference signals; and transmitting a plurality of groups of second reference signals, where each first reference signal corresponds to one of the plurality of groups of second reference signal, and the group of second reference signals includes a plurality of second reference signals, where a part of reference signals in the group of second reference signals include quasi co-located information, and the quasi co-located information indicates a correlation between resources for the group of second reference signals including the quasi co-located information and resources for the first reference signal corresponding to the group of second reference signals.