MRS Handler Identity for 5G Neighbor Relation Setup

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Solution Overview

Problem

In 5G wireless communication networks, the existing automatic neighbor relation (ANR) algorithm fails to identify the source of Mobility Reference Signals (MRS) in scenarios with high gain and dynamic beamforming, leading to impaired handover performance and reduced network efficiency.

Innovation Solution

A method where wireless devices and radio network nodes transmit the identity of the MRS handler associated with each MRS, allowing the network to identify the origin of MRS and establish neighbor relationships efficiently, even in complex beamforming environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If existing ANR algorithm is used in high gain and dynamic beamforming scenarios, then device complexity is reduced, but measurement precision deteriorates leading to failed MRS source identification

Engineering Contradiction:

Improvealgorithm complexityVSAvoidMRS source identification accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces MRS handler IDs as an intermediary element that mediates between the MRS signals and the ANR algorithm. Instead of directly identifying MRS sources which fails in high gain beamforming scenarios, the system uses MRS handler IDs transmitted by gNBs as a reliable intermediary identifier that wireless devices can detect and report, enabling successful neighbor relation setup without increasing algorithm complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system performs preliminary action by having gNBs transmit their MRS handler IDs along with MRS signals in advance. This allows wireless devices to obtain the identifier before handover decisions are made, ensuring that the ANR algorithm receives accurate identification information proactively rather than attempting to extract it from complex beamformed signals

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If frequent broadcast of cell identities is implemented, then neighbor cell identification speed is improved, but information loss increases due to inability to read system information in high gain beamforming

Engineering Contradiction:

Improveneighbor cell identification timeVSAvoidsystem information reading capability

Core Design Contradiction:

Loss of timeVSLoss of information

Solution Approach 1:

The patent extracts the essential identification function from the complex system information broadcast and separates it into a dedicated MRS handler ID element. This extracted identifier is transmitted independently and can be reliably detected even when system information reading fails due to high gain beamforming, allowing quick neighbor cell identification without losing information about the neighbor's identity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system changes the identification parameter from full system information (which includes cell identities but is difficult to read in high gain scenarios) to a simplified MRS handler ID parameter. This parameter change maintains the ability to identify neighbor cells quickly while avoiding the information loss associated with failed system information reading

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If automatic neighbor relation setup is attempted without MRS handler IDs, then device complexity is minimized, but network reliability deteriorates due to failed handovers

Engineering Contradiction:

Improvedevice processing complexityVSAvoidhandover reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The MRS handler ID serves as a reliable intermediary that enables automatic neighbor relation setup to function correctly. By providing a clear, unambiguous identifier that wireless devices can detect and report, the system ensures reliable handovers without increasing device processing complexity, as the device only needs to detect and forward the pre-transmitted MRS handler ID

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10681600B2Wireless device, radio network nodes and methods performed therein

Publication Date: 2020.06.09 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to a method performed by a wireless device (10) for handling neighbour relationships between radio network nodes in a wireless communication network. The wireless device (10) obtains a request from a first radio network node to provide an identity of a mobility reference signal (MRS) handler associated with one or more MRSs. Furthermore, the wireless device (10) obtains the identity of the MRS handler, which identity is in direct association with at least one MRS out of the one or more MRSs, and reports to the first radio network node, the identity of the MRS handler.