Reference Signaling for 5G Interference Identification

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Solution Overview

Problem

In 5G wireless communication networks, identifying sources of interference caused by atmospheric conditions is challenging due to the limited number of physical cell IDs, which are insufficient for networks with a large number of nodes, leading to ambiguous identification and interference issues.

Innovation Solution

Introducing reference signaling that indicates the identity of network nodes, allowing for easy and reliable identification of interfering nodes through unique sequences and resource mapping, even over long distances and atmospheric channels, using methods like Gold sequences and Zadoff-Chu sequences.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If physical cell IDs are reused for distant cells to support large-scale networks, then network scalability is improved, but interference identification accuracy deteriorates due to ambiguous ID assignment

Engineering Contradiction:

Improvenetwork scalabilityVSAvoidinterference identification accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The identification system is segmented into multiple components: traditional physical cell IDs for basic cell identification, and new reference signaling sequences (CSI-RS, PSSCH) that provide additional identification dimensions. This segmentation allows distant cells to reuse physical cell IDs while maintaining unique identification through different reference signaling sequences, thus supporting network scalability without sacrificing interference identification accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds new identification dimensions beyond physical cell IDs by introducing reference signaling sequences with unique parameters (sequence indices, time-frequency resource positions). This dimensional expansion enables unique identification of distant cells even when physical cell IDs are reused, resolving the contradiction between network scalability and interference identification accuracy.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Area of stationary object

If reference signaling is transmitted over long distances through atmospheric channels, then identification coverage is improved, but signal reliability deteriorates due to atmospheric interference

Engineering Contradiction:

Improveidentification coverageVSAvoidsignal reliability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The system performs preliminary actions by transmitting reference signaling sequences before actual data communication. These sequences are designed with known structures and parameters that enable receiving nodes to identify and compensate for atmospheric channel effects in advance, improving signal reliability for long-distance transmissions while expanding identification coverage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The reference signaling mechanism incorporates feedback loops where receiving nodes measure the received reference signals, identify atmospheric channel characteristics, and report this information back to transmitting nodes. This feedback enables adaptive compensation for atmospheric interference, maintaining signal reliability over extended coverage areas.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12003316B2Reference signaling for radio access networks

Publication Date: 2024.06.04 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

There is disclosed a method of operating a network node for a radio access network. The method includes transmitting reference signaling indicating an identity associated to the network node. The disclosure also pertains to related devices and methods.