Vehicular Ad-Hoc Relay Connectivity for Obstructed Mobile Links

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Solution Overview

Problem

Communication devices experience connectivity loss due to obstructions like tunnels or bridges, and traditional solutions such as distributed antenna systems are costly and cause interference.

Innovation Solution

Utilizing a vehicular ad-hoc network (VANET) through V2X protocols to establish connections between communication devices, allowing them to relay signals to a base station.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a distributed antenna system is implemented to provide connectivity in obstructed areas, then connectivity reliability is improved, but implementation cost increases and interference among communication devices worsens

Engineering Contradiction:

Improveconnectivity reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a relay device (such as a vehicle-mounted communication device) as an intermediary to forward signals between the base station and communication devices in obstructed areas. This mediator enables connectivity without requiring expensive infrastructure changes like distributed antenna systems, thereby maintaining reliability while avoiding the associated costs and interference issues.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system leverages existing communication devices (e.g., vehicles with communication capabilities) to provide relay services for other devices in need. Instead of deploying dedicated infrastructure, the patent enables devices to self-organize into relay networks, where capable devices automatically assist others, reducing overall system complexity and cost.

Inventive Principle:

Principle #25Self-service

2Use of energy by moving object

If a distributed antenna system with amplifiers is deployed to extend signal coverage, then signal strength is improved, but interference among communication devices increases

Engineering Contradiction:

Improvesignal strengthVSAvoidinterference

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The relay device acts as an intelligent intermediary that receives signals from the base station and forwards them to obstructed devices. This approach maintains signal strength without requiring high-power amplifiers that cause interference, as the relay device processes and regenerates signals at appropriate power levels for local transmission.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If communication devices change geographic location to overcome obstructions, then connectivity is restored, but service continuity is interrupted

Engineering Contradiction:

ImproveconnectivityVSAvoidservice interruption time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system establishes relay connections proactively before complete signal loss occurs. When a communication device detects weakening signals due to obstructions, it automatically connects to available relay devices, ensuring seamless continuity of service without requiring the device to physically relocate or experience complete disconnection.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260025860A1Methods, systems, and devices for maintaining communication device connectivity to a mobile network through a vehicular ad-hoc network

Publication Date: 2026.01.22 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Aspects of the subject disclosure may include, for example, determining that the first communication device is not communicatively coupled to a base station, initiating a protocol to request a connection to the base station via an ad-hoc network, and communicatively coupling to a second communication device utilizing the protocol, wherein the ad-hoc network comprises the second communication device. Other embodiments are disclosed.