D2D Geocasting With Area Identifiers for Targeted Message Delivery
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Solution Overview
Problem
Existing D2D communication technologies face inefficiencies in addressing messages to specific groups of recipients within a geographical area, leading to excessive resource usage and network congestion due to repeated transmissions or flooding.
Innovation Solution
Implementing a D2D geocasting mechanism that uses area identifiers to target geographical areas, allowing efficient delivery of messages by defining multiple geographical areas and using gateway UEs to relay transmissions through direct or multi-hop paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broadcast transmissions are used to deliver messages to all receivers within range, then message delivery coverage is improved, but resource efficiency deteriorates due to excessive transmissions and network congestion
Solution Approach 1:
The patent segments the broadcast transmission by introducing geographical area identifiers that divide the coverage area into distinct zones. Messages are segmented with specific area identifiers so that only receivers in the target geographical area process and deliver the messages, while other receivers ignore them. This segmentation approach maintains comprehensive coverage reliability while improving resource efficiency by eliminating unnecessary processing and retransmissions outside the target area.
2Reliability
If flooding mechanism is used to ensure message delivery to all potential recipients, then message delivery reliability is improved, but network congestion worsens due to repeated transmissions
Solution Approach 1:
The patent applies local quality by making message handling behavior dependent on the receiver's location relative to the target geographical area. Receivers in the target area process and potentially forward messages, while receivers outside the area discard them without processing. This localized quality control ensures reliable delivery to intended recipients while preventing network congestion by eliminating unnecessary message propagation and repeated transmissions in areas where the message is not needed.
3Loss of energy
If unicast transmissions are used to address specific recipients, then resource efficiency is improved, but device complexity increases due to individual address management
Solution Approach 1:
The patent introduces a new dimension for addressing by adding geographical area identifiers to the message routing mechanism. Instead of managing individual recipient addresses in unicast or group identifiers in groupcast, the system uses geographical area coordinates as an additional dimension for message targeting. This dimensional approach simplifies address management by replacing complex device-specific addressing with location-based addressing, thereby reducing device complexity while maintaining resource efficiency.
Data Source
AI summary
A wireless communication device obtains configuration information defining multiple geographical areas. Further, the wireless communication device sends an outgoing D2D transmission. The outgoing D2D transmission comprises an area identifier to identify one of the geographical areas as target geographical area of the outgoing D2D transmission and to address the outgoing D2D transmission to one or more wireless communication devices in the identified target geographical area of the outgoing D2D transmission.