User Equipment Device-to-Device Warning Relay
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Solution Overview
Problem
Public warning systems face challenges in effectively reaching mobile devices during catastrophic events when parts of the mobile network are dysfunctional, such as during earthquakes, due to damaged base stations or power outages, leading to unreachable mobile devices.
Innovation Solution
A method for user equipment in a wireless communication network that utilizes device-to-device communication to relay warning information between user equipment, even when network coverage is reduced, by receiving a warning indication and sending it via device-to-device communication, including broadcasting, multicasting, or adding it to a synchronization signal, to ensure warning information reaches devices out of network coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If public warning systems broadcast warning notifications to multiple mobile devices simultaneously via network infrastructure, then warning information can be delivered quickly to devices within network coverage, but mobile devices in areas with damaged base stations or power outages remain unreachable
Solution Approach 1:
The patent introduces user equipment as intermediary nodes that receive warning indications from the network and relay them to other user equipment via device-to-device communication. This mediator approach enables warning propagation through devices themselves when network infrastructure is damaged, extending coverage to areas with base station failures or power outages while maintaining reliable warning delivery through the relay mechanism
Solution Approach 2:
The patent transitions from a single-dimensional network-centric warning delivery model to a multi-dimensional approach by adding device-to-device communication as a parallel transmission path. This dimensional change allows warnings to propagate through both network infrastructure and direct device connections simultaneously, ensuring delivery to devices regardless of network coverage status
2Adaptability or versatility
If device-to-device communication is used to relay warning information between user equipment, then coverage is extended to devices out of network coverage, but the system complexity increases due to direct communication protocols
Solution Approach 1:
The patent makes user equipment universally functional by enabling them to perform multiple roles: receiving warnings from the network, processing warning information, and relaying warnings to other devices. This multi-functionality reduces the need for specialized emergency communication devices while extending coverage, as standard smartphones can participate in the relay network
Solution Approach 2:
The system implements self-service by allowing user equipment to automatically detect warning indications, extract warning information, and initiate relay transmission without manual intervention. The devices autonomously manage the complex relay protocols, reducing the perceived complexity for end users while maintaining robust warning propagation
3Adaptability or versatility
If warning information is relayed through multiple user equipment devices, then coverage is extended to areas with no network coverage, but redundant messages and information flooding may occur
Solution Approach 1:
The patent implements feedback mechanisms where user equipment track and compare received warning indications against already-relayed warnings. Devices use identification information in warnings to detect duplicates and suppress redundant transmissions, preventing information flooding while maintaining comprehensive coverage through the relay network
Solution Approach 2:
The system discards redundant warning messages by comparing identification information across relayed warnings. When a device receives a warning with an already-known identifier, it discards the duplicate transmission. This selective discarding maintains information quality by preventing flooding while preserving unique warning content across the extended coverage area
Data Source
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AI summary
A method for operating a user equipment (104-110) in a wireless communication network (100) and a user equipment (104-110) are described. The user equipment (104-110) is able to communicate both with a communication network (100) and via a device-to-device communication with another user equipment (104-110).