Group-Based Relay Selection for Wireless Networks

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Solution Overview

Problem

In wireless communication networks, particularly in V2X scenarios, vehicles moving at high velocities lead to frequent relay path changes, resulting in a high number of reconfigurations and service interruptions due to the short lifetime of relay paths, increasing the risk of reconfiguration failures and traffic errors.

Innovation Solution

A method where a radio device configures a group of further radio devices as candidate relay nodes and selects one or more of them to act as relay nodes for communication with the wireless communication network, allowing for efficient management of relay paths and reducing the need for frequent reconfigurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single relay node is used for communication, then the communication path is simple, but the relay path lifetime is short due to high vehicle mobility

Engineering Contradiction:

Improverelay path structureVSAvoidrelay path lifetime

Core Design Contradiction:

Device complexityVSDuration of action of moving object

Solution Approach 1:

The patent combines multiple relay nodes into a group that serves a single remote UE. Instead of relying on one relay node, the system merges several candidate relay nodes (e.g., relay UEs 21-26) into a collaborative group, where multiple nodes work together to extend the relay path lifetime and provide redundancy against mobility-induced disruptions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements dynamic relay node selection where the remote UE can switch between different relay nodes within the group based on current channel conditions and mobility patterns. This dynamic adaptation allows the system to respond to changing vehicle positions and maintain communication reliability despite high mobility.

Inventive Principle:

Principle #15Dynamics

2Reliability

If relay nodes are frequently switched to maintain connectivity, then communication continuity is maintained, but reconfiguration overhead increases

Engineering Contradiction:

Improvecommunication continuityVSAvoidreconfiguration overhead

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary configuration of multiple candidate relay nodes before they are needed. The remote UE pre-establishes communication parameters and measurements with several potential relay nodes in advance, so when a switch is needed, the reconfiguration can be executed quickly using the pre-prepared information, reducing the time loss associated with frequent switches.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent maintains continuous monitoring and measurement of multiple relay nodes simultaneously, rather than switching sequentially. This allows the system to maintain uninterrupted communication by having ready-to-use alternative relay paths, eliminating gaps that would occur during sequential switching and reconfiguration.

Inventive Principle:

Principle #20Continuity of useful action

3Duration of action of moving object

If multiple relay nodes are configured as candidates, then relay path lifetime is extended, but device complexity increases

Engineering Contradiction:

Improverelay path lifetimeVSAvoidrelay node management

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The patent segments the relay node management function into distinct components: candidate selection, active relay selection, and fallback management. By dividing the complex task of managing multiple relay nodes into these manageable segments, the system can handle the increased complexity through structured procedures rather than monolithic control logic.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables the remote UE to autonomously manage its own relay node selections and switches without requiring constant network intervention. The UE performs self-measurements, self-evaluations of relay node quality, and self-directed switching decisions, which reduces the overall system complexity despite managing multiple relay nodes.

Inventive Principle:

Principle #25Self-service

4Reliability

If relay reconfigurations are performed frequently, then connectivity is maintained, but service interruptions increase

Engineering Contradiction:

Improveconnectivity maintenanceVSAvoidservice interruption duration

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent introduces an intermediary layer of pre-configured candidate relay nodes that mediate between the remote UE and the network. When a relay switch is needed, these intermediary nodes provide seamless handover paths, reducing the duration of service interruptions by maintaining communication flow through pre-established alternative paths rather than direct reconfiguration.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11622416B2Group-based relay selection for wireless network communication

Publication Date: 2023.04.04 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A radio device configures a group of further radio devices as candidate relay nodes for communication with the wireless communication network. Further, the radio device selects one or more of the further radio devices from the group as relay node for communication with the wireless communication network. Further, the radio device communicates with the wireless communication network via said one or more selected further radio devices.