D2D Communication Forwarding Filtering for V2X Congestion
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Solution Overview
Problem
In D2D communication, especially in V2X scenarios, increasing transmitting power or using multiple-hop relays to maintain service continuity can lead to network congestion when forwarding important information, such as traffic conditions, due to the forwarding of excessive data, which hampers the delivery of critical information to vehicles that need it.
Innovation Solution
A D2D communication method where terminal devices determine whether to forward information based on specific forwarding conditions, such as position and time criteria, ensuring that only relevant devices forward the information, thereby filtering out unnecessary data and preventing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmitting power is increased to ensure service continuity when distance between vehicles exceeds a certain range, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The patent introduces intermediary vehicles as relay nodes to forward information between sending and receiving vehicles. Instead of directly transmitting over long distances (which requires high power), the information is passed through intermediate devices that are closer to each other, reducing the transmitting power required at each hop while maintaining communication reliability.
Solution Approach 2:
The patent divides the long-distance transmission into multiple short-distance segments through multi-hop relay communication. Each segment covers a shorter distance between adjacent vehicles, allowing lower transmitting power per segment while achieving end-to-end communication continuity over longer ranges.
2Reliability
If information is forwarded by multiple-hop relay between sending and receiving vehicles, then service continuity is maintained, but network congestion occurs due to massive information forwarding
Solution Approach 1:
The patent applies local quality by making forwarding decisions based on local conditions at each relay node. Each vehicle evaluates its own state (position, speed, communication quality) and the characteristics of received information to determine whether to forward, thereby optimizing the forwarding process according to local requirements rather than uniformly forwarding all information.
Solution Approach 2:
The patent implements partial forwarding where not all received information is forwarded to the next hop. Instead, each relay node selectively forwards only the necessary or relevant information based on evaluation criteria, performing a partial action rather than complete forwarding of all information packets.
3Ease of operation
If a competition mechanism is adopted for information sending between devices, then network access is managed, but important information cannot be delivered timely due to congestion from other information
Solution Approach 1:
The patent implements feedback mechanisms where relay nodes evaluate the importance of received information and make forwarding decisions based on this evaluation. The system provides feedback about information characteristics and network conditions to determine whether to forward, allowing priority information to be identified and delivered timely despite the presence of competition mechanisms for network access.
Data Source
AI summary
Embodiments of the present invention provide a D2D communication method and a D2D device. The method comprises: a first terminal device determines information to be forwarded, the information to be forwarded comprising target information and forwarding condition information; and the first terminal device sends the information to be forwarded, such that when receiving the information to be forwarded, a second terminal device determines, according to the forwarding condition information, whether to forward the information to be forwarded. In this way, congestion caused by a large amount of information forwarding is avoided by filtering terminal devices available for information forwarding and enabling a terminal device meeting particular conditions to forward information to be forwarded, thereby avoiding congestion caused by forwarding of a large amount of information.