Measurement Configuration Identification for CSI-RS in LTE

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Solution Overview

Problem

Current measurement frameworks in 3GPP's Advanced EUTRA for channel state information reference symbols (CSI-RS) lack an efficient method for distinguishing between conventional RRM measurements and new measurements using CSI-RS, and do not provide a clear mechanism for reporting measurement results effectively.

Innovation Solution

A communication system where a base station notifies a mobile station with specific measurement configurations indicating whether to use cell-specific reference signals or channel state information reference symbols, including identification bits to differentiate between measurement types, allowing the mobile station to determine the appropriate configuration for measurement and reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the existing measurement framework is extended to include CSI-RS measurements without adding new configuration elements, then device complexity is reduced, but measurement precision and reliability are compromised due to ambiguity in distinguishing CSI-RS measurements from conventional RRM measurements

Engineering Contradiction:

Improvemeasurement configuration complexityVSAvoidmeasurement type identification accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The measurement configuration is segmented into distinct components: measurement objects (defining what to measure), report configurations (defining when and how to report), and a new identification bit (differentiating measurement types). This segmentation allows clear distinction between CSI-RS measurements and conventional RRM measurements while maintaining organized configuration management.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An identification bit is introduced as an intermediary element within the measurement configuration. This bit acts as a mediator that enables the mobile station to clearly distinguish between CSI-RS measurements and conventional RRM measurements without adding complex configuration structures, thus resolving the ambiguity while keeping the system relatively simple.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If a new identification mechanism is added to distinguish CSI-RS measurements from conventional RRM measurements, then measurement precision is improved, but device complexity increases due to additional configuration elements

Engineering Contradiction:

Improvemeasurement type identification accuracyVSAvoidmeasurement configuration complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

Rather than redesigning the entire measurement configuration framework, only a partial extension is made by adding a single identification bit to existing measurement objects. This minimal addition provides sufficient differentiation capability without overwhelming complexity, applying the principle of doing just enough to solve the problem.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The measurement configuration is extended by adding a new parameter (identification bit) to existing structures. This parameter change enables clear distinction between measurement types while maintaining compatibility with the existing measurement framework, avoiding the need for complete restructuring.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the measurement framework is extended to support CSI-RS with full reporting capabilities, then measurement precision and versatility are improved, but loss of information increases due to potential conflicts with existing RRM measurement reporting mechanisms

Engineering Contradiction:

Improvemeasurement framework flexibilityVSAvoidmeasurement report interpretation accuracy

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The report configuration includes an identification bit that provides feedback information along with measurement results. This bit enables the base station to correctly interpret measurement reports by identifying whether they pertain to CSI-RS measurements or conventional RRM measurements, preventing information loss and ensuring accurate processing.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The measurement reporting mechanism is designed to be universal, handling both CSI-RS measurements and conventional RRM measurements through a unified report structure. The identification bit enables this multi-functionality by allowing the same reporting framework to accommodate different measurement types without conflict or information loss.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2854440B1Communication system, base station device, mobile station device, measurement method, and integrated circuit

Publication Date: 2020.03.04 SHARP KK

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AI summary

In a communication system in which a base station apparatus notifies a mobile station apparatus of a measurement configuration indicating a configuration of measurement using a reference signal, in the measurement configuration, there are at least a first measurement configuration to carry out measurement using a cell-specific reference signal and a second measurement configuration to carry out measurement using a channel state information reference symbol, and the mobile station apparatus determines whether the measurement configuration is the first measurement configuration or the second measurement configuration based on the measurement configuration notified from the base station apparatus.