UE Range Estimation via Beam Time Delay Reporting

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Solution Overview

Problem

In next-generation 5G communication systems, particularly in massive Machine Type Communication (MTC) services, there is a challenge in accurately estimating the range between User Equipment (UE) and Base Stations due to high connection density and varying latency requirements, which affects the efficiency of range estimation and communication.

Innovation Solution

A method where User Equipment (UE) receives signals from multiple beams, calculates the time delay or phase difference for each beam, and reports the beam index with the smallest time delay or phase difference to the Base Station (BS), allowing the BS to estimate the range based on this feedback in an asynchronous state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional range estimation methods are used in massive MTC services, then connection density can be supported, but range estimation accuracy deteriorates due to high connection density and varying latency requirements

Engineering Contradiction:
Improverange estimation accuracyVSAvoidconnection density complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the range estimation process by having different UEs report their estimated ranges to the BS. Each UE independently calculates its range based on received signals from multiple beams, and reports this information separately. This segmentation allows the system to handle high connection density while maintaining accurate range estimation for each individual UE through distributed calculation rather than centralized processing.

Inventive Principle:
Principle #1Segmentation

2Measurement precision

If detailed signal information is reported for each beam, then range estimation accuracy improves, but feedback information transmission volume increases

Engineering Contradiction:
Improverange estimation accuracyVSAvoidfeedback information transmission
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent extracts only the essential range estimation information from the detailed signal measurements. Instead of reporting complete signal characteristics for each beam, each UE calculates its estimated range and reports only this extracted range information to the BS. This extraction approach maintains accurate range estimation while significantly reducing the volume of feedback information that needs to be transmitted.

Inventive Principle:
Principle #2Taking out (Extraction)

3Adaptability or versatility

If synchronous state is maintained between UE and BS, then coordination is simplified, but flexibility in handling varying latency requirements deteriorates

Engineering Contradiction:
Improvelatency requirement flexibilityVSAvoidcoordination complexity
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent changes the operational parameter from synchronous communication to asynchronous communication between UE and BS. In this asynchronous mode, UEs can independently calculate and report their range estimates without requiring strict synchronization with the BS. This parameter change provides flexibility to handle varying latency requirements of different MTC services while simplifying coordination, as each UE operates independently based on its own timing.

Inventive Principle:
Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach reduces feedback information transmission and significantly decreases range estimation errors, enhancing the accuracy of range estimation in asynchronous scenarios.

Implementation Method 1

calculating a time delay or a phase difference of the signal per beam for a plurality of the beams

Methodology Applied
Scientific EffectTime delay:

Implementation Method 2

calculating a time delay or a phase difference of the signal per beam for a plurality of the beams

Methodology Applied
Scientific EffectPhase difference:

Implementation Method 3

transmitting a signal through each of a plurality of beams to a user equipment

Methodology Applied
Scientific EffectSignal propagation:

Data Source

PatentUS11089434B2Method for transmitting and receiving reports for range estimation and communication device therefor
Publication Date: 2021.08.10 LG ELECTRONICS INC
  • US11089434B2 patent drawing
  • US11089434B2 patent drawing
  • US11089434B2 patent drawing

AI summary

A method for transmitting, by a user equipment, reports for range estimation may comprise the steps of: receiving a signal from each of a plurality of beams of a base station; calculating a time delay or a phase difference of a signal for each of the plurality of beams; and reporting, to the base station, beam index information indicating a corresponding beam with the smallest time delay or the smallest phase difference on the basis of the calculation. The user equipment is capable of communicating with at least one of another user equipment, a user equipment related to an autonomous driving vehicle, a base station or a network.