5G Tracking Reference Signal Resource Element Shift

Solution Overview

Problem

In next-generation/5G radio access networks, there is a need to determine and efficiently transmit tracking reference signals (TRS) to user equipment, requiring flexible resource allocation to meet various usage scenarios such as enhanced mobile broadband, massive machine-type communication, and ultra-reliable and low-latency communication.

Innovation Solution

A method is provided where a base station configures and transmits a resource element shift value to user equipment for mapping frequency domain resources, allowing the TRS to be transmitted efficiently, which includes determining and signaling the resource element shift value for TRS transmission, enabling precise mapping and reduction of inter-cell interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexible frame structures are designed to meet different usage scenarios (eMBB, mMTC, URLLC), then adaptability is improved, but device complexity increases

Engineering Contradiction:

ImproveadaptabilityVSAvoidcomplexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by introducing a resource element shift value K that can be configured to map TRS to different frequency domain resources. This allows the same TRS transmission mechanism to serve multiple usage scenarios (eMBB, mMTC, URLLC) by adjusting mapping parameters, thereby improving adaptability without significantly increasing device complexity.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements universality by designing a unified TRS transmission method that can serve multiple usage scenarios through a single mechanism. The base station configures a resource element shift value K that works across different scenarios, allowing one system to handle diverse requirements (enhanced mobile broadband, massive machine-type communication, and ultra-reliable low-latency communication) without requiring separate specialized mechanisms for each.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If resource element shift value K is configured and signaled to enable precise TRS mapping, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvemeasurement precisionVSAvoidcomplexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by introducing a resource element shift value K that can be configured to map TRS to different frequency domain resources. This allows the same TRS transmission mechanism to serve multiple usage scenarios (eMBB, mMTC, URLLC) by adjusting mapping parameters, thereby improving adaptability without significantly increasing device complexity.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback by having the base station configure and signal the resource element shift value K to the user equipment. This feedback mechanism allows precise TRS mapping while keeping the complexity manageable, as the configuration is provided by the network side based on actual deployment requirements.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11843490B2Method and apparatus for transmitting tracking reference signal in new radio

Publication Date: 2023.12.12 KT CORP

AI summary

Provided is a method of transmitting a tracking reference signal (TRS) in a next-generation/5G radio access network, and for transmitting the TRS by a base station to a user equipment. The method may include configuring a resource element shift value K for mapping a frequency domain resource of a TRS to a user equipment, transmitting the K value to the user equipment, and transmitting the TRS mapped to the frequency domain resource based on the K value to the user equipment.