UE Reference Signal Selection for Wireless Communication Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially in scenarios using unlicensed spectrum, the beam management and channel state information feedback are limited by the beam used during Listen Before Talk (LBT), leading to increased overhead, as the channel occupancy in other directions is not reflected, restricting transmission and feedback within the beam's coverage.
Innovation Solution
A method where the selection of reference signals is associated with a spatial reception parameter, allowing only specific reference signals to be used for beam management and channel state information measurement, thereby reducing overhead by implicitly indicating the necessary signals and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to improve communication quality in massive MIMO system, then communication quality is improved, but beam management overhead increases
Solution Approach 1:
The patent extracts only the necessary reference signals for measurement based on the LBT beam direction, rather than requiring measurements of all reference signals. This reduces beam management overhead while maintaining communication quality by focusing measurements only on relevant signals within the LBT beam coverage.
Solution Approach 2:
The patent applies local quality by restricting channel state information measurements to only those reference signals that fall within the LBT beam coverage area. This localized measurement approach reduces overall system overhead while maintaining accurate channel state information for the active transmission direction.
2Measurement precision
If channel state information measurement is performed for all reference signals, then measurement precision is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts and reports only the channel state information for reference signals that are within the LBT beam coverage, rather than reporting all reference signal measurements. This reduces feedback overhead while maintaining measurement precision for the relevant signals.
Solution Approach 2:
The patent performs partial measurement by only measuring and reporting channel state information for a subset of reference signals (M1 out of M total) that are relevant to the current LBT beam direction, rather than performing exhaustive measurements of all reference signals.
3Object-affected harmful factors
If LBT beam coverage is limited to specific direction, then interference to other directions is reduced, but transmission coverage is restricted
Solution Approach 1:
The patent makes the transmission coverage dynamic by adapting it to the LBT beam direction. The effective coverage area changes based on the LBT beam orientation, allowing the system to optimize coverage in the intended direction while naturally limiting interference to other directions through the directional nature of beamforming.
Data Source
AI summary
A method and device for wireless communication in a UE and a base station is disclosed. The UE receives M first-type reference signals respectively in M first-type air interface resources, receives a first wireless signal, and transmits first report information. A first spatial reception parameter is used for reception of the first wireless signal. The measurement of only M1 first-type reference signal(s) of the M first-type reference signals is used to generate the first report information. The selection of the M1 first-type reference signal(s) is associated with the first spatial reception parameter. The disclosure reduces signaling and feedback overhead associated with beam management and channel measurement.