Cellular Broadcast Indirection for Emergency Alert Delivery

Solution Overview

Problem

Current cellular broadcast infrastructure struggles to efficiently deliver large alert messages and data chunks to vehicles in emergency situations due to static periodicity and limited radio capacity, which can lead to significant delays in emergency-related communications.

Innovation Solution

Implementing an indirection process using the cell broadcast infrastructure for short alert messages via SIB messaging, while allowing C-V2X clients to fetch large data chunks via a data channel, and dynamically adjusting the periodicity of message delivery based on the type and size of the alert to optimize radio capacity usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If cellular broadcast infrastructure uses static periodicity for message delivery, then system simplicity is maintained, but delivery speed and efficiency deteriorate for large alert messages

Engineering Contradiction:

Improvemessage delivery speedVSAvoidmessage delivery system complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent implements dynamic periodicity adjustment in the message delivery system. The network device adjusts the periodicity of message delivery based on the size and type of alert messages. For large data chunks, longer periodicity is used to optimize radio capacity, while for urgent short alerts, shorter periodicity ensures fast delivery. This dynamic adjustment resolves the contradiction between delivery speed and system complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments large alert messages into multiple data chunks for delivery. Instead of delivering large messages in a single transmission, the system divides them into manageable segments that can be transmitted efficiently over the broadcast channel. This segmentation allows the system to maintain static periodicity for simplicity while still achieving efficient delivery of large volumes of data.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If cellular broadcast infrastructure delivers large data chunks directly via control channel, then message completeness is ensured, but radio capacity is exceeded and delivery efficiency deteriorates

Engineering Contradiction:

Improvedata transmission volumeVSAvoidradio capacity utilization

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent segments large alert messages into multiple data chunks for delivery. Instead of delivering large messages in a single transmission, the system divides them into manageable segments that can be transmitted efficiently over the broadcast channel. This segmentation allows the system to maintain static periodicity for simplicity while still achieving efficient delivery of large volumes of data.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an indirection mechanism where the control channel delivers a reference or pointer to the actual data content. Instead of transmitting large data chunks directly over the control channel, the system uses the control channel to deliver a compact reference that points to the location or identifier of the full message, thereby conserving radio capacity while ensuring message completeness.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If cellular broadcast infrastructure uses uniform message delivery for all alert types, then system simplicity is maintained, but adaptability to different message sizes and urgencies deteriorates

Engineering Contradiction:

Improvemessage delivery adaptabilityVSAvoidmessage delivery system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic periodicity adjustment in the message delivery system. The network device adjusts the periodicity of message delivery based on the size and type of alert messages. For large data chunks, longer periodicity is used to optimize radio capacity, while for urgent short alerts, shorter periodicity ensures fast delivery. This dynamic adjustment resolves the contradiction between delivery speed and system complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies different delivery parameters to different types of messages based on their specific characteristics. Urgent short alerts receive high-priority treatment with shorter periodicity and immediate delivery, while non-urgent large data chunks use longer periodicity to optimize radio capacity. This local quality approach allows the system to adapt to different message requirements without requiring complete system redesign.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10797812B2Cellular broadcast messaging and indirection

Publication Date: 2020.10.06 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Transmission of a cellular broadcast message, comprising identification data associated with content to be transmitted to the user equipment, is performed using a first communications channel that carries cellular broadcast messages. Based on a determination that the cellular broadcast message relates to an emergency, a periodicity associated with a frequency of cellular broadcast message transmissions can be modified, and a network device can transmit the emergency alert message to the user equipment at the modified periodicity. A second communications channel associated with a communications network protocol can be selected, based on a network transmission condition. A connection can be established via the second communications channel with an application server device based on the identification data, and content from the application server device can be transmitted to the user equipment.