D2D Broadcast Message Segmentation for Geographical Coverage
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Solution Overview
Problem
Existing telecommunications networks face challenges in efficiently transmitting message content over a geographical area, particularly when using device-to-device communication, as they often result in a large number of messages, especially in chain message scenarios, and require known communication addresses, which limits coverage and speed.
Innovation Solution
A method utilizing D2D or PC5 sidelink functionality, specifically Mode 4, for transmitting initial broadcast messages that can be relayed by receivers acting as further transmitters, covering a geographical area with a mesh method, allowing decentralized distribution without requiring MSISDN of recipients, and using additional information like message identification, position, and validity time to optimize message propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If device-to-device communication is used to transmit message content, then communication speed is improved, but the number of messages increases significantly
Solution Approach 1:
The patent segments the geographical area into multiple zones, each covered by a limited number of broadcast messages. Receivers are assigned to specific zones, and only receivers in the target zone receive the message, preventing universal broadcasting to all devices. This segmentation reduces the total number of messages while maintaining fast D2D communication within each segment.
2Area of stationary object
If broadcast messages are transmitted to cover a geographical area, then coverage area is improved, but the number of messages increases
Solution Approach 1:
The patent applies local quality by transmitting different broadcast messages targeted at specific geographical zones rather than uniform broadcasting. Each message is localized to a particular area, and receivers determine their zone based on position information. This allows comprehensive geographical coverage to be achieved with fewer messages, as each message serves a specific local area rather than attempting to reach all receivers universally.
3Loss of information
If chain messages are used for information distribution, then information reach is improved, but message propagation complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-assigning receivers to specific geographical zones and pre-determining which broadcast messages should be transmitted to which zones. Position information and zone assignments are established in advance, allowing receivers to quickly determine their target zone and receive appropriate messages without complex real-time propagation decisions. This reduces message propagation complexity while maintaining comprehensive information reach.
Data Source
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AI summary
A method for transmitting message content by means of a plurality of broadcast messages to cover a geographical area is described, wherein a sender transmits at least one initial broadcast message, the message content is sent by the sender to a plurality of receivers as a broadcast message by means of a D2D functionality, device-to-device functionality or a PC5 sidelink functionality, in particular using the Mode 4 functionality, wherein the sender has a radio coverage area within which reception of transmitted broadcast messages by the receivers is possible, wherein the method for covering the geographical area comprises the following steps: -- in a first step the sender transmits the initial broadcast message comprising the message content and initial additional information and a first receiver receives the initial broadcast message,-- In a subsequent second step, the receivers - as further senders - each transmit further broadcast messages, the further broadcast messages comprising the message content and further additional information for covering the geographical area.