IAB Node V2V Message Propagation via Hierarchical Relaying
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently delivering vehicle-to-vehicle (V2V) messages, particularly in reducing latency and expanding transmission range for V2V communication, especially when using sidelink technology which may be limited by millimeter wave blockages and restricted by the 3GPP Rel-16 IAB structure.
Innovation Solution
The implementation of an integrated access and backhaul (IAB) node that establishes direct links with terminals to rapidly propagate event messages, utilizing a hierarchical structure of IAB nodes to broadcast messages within coverage, allowing for efficient delivery of event messages between vehicles without relying solely on sidelink communication and overcoming millimeter wave blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink technology is used for V2V communication, then direct communication between vehicles is enabled, but transmission range is restricted and millimeter wave blockages occur
Solution Approach 1:
The patent introduces IAB nodes as intermediary relay points between vehicles. Instead of direct sidelink communication between vehicles, messages are transmitted through IAB nodes that establish connections with terminals and relay event messages. This mediator approach bypasses the millimeter wave blockage issue by using alternative transmission paths through the IAB infrastructure.
2Length of moving object
If sidelink technology is used for V2V communication, then direct communication is established, but transmission range is limited
Solution Approach 1:
The patent segments the V2V communication path into multiple hops through a hierarchical IAB node structure. Event messages are transmitted from source terminals through multiple IAB nodes (parent IAB, child IAB) to reach destination terminals. This segmentation allows the message to traverse a much longer distance than direct sidelink by breaking the transmission into manageable segments relayed through intermediate nodes.
Solution Approach 2:
The patent adds a spatial dimension to V2V communication by introducing a hierarchical IAB node architecture with parent-child relationships. Instead of limited direct peer-to-peer links, messages can propagate through multiple levels of the hierarchy, effectively extending coverage in the spatial dimension and enabling wide-area message propagation.
3Length of moving object
If hierarchical IAB structure is used to extend transmission range, then message propagation distance increases, but system complexity increases
Solution Approach 1:
The patent implements a universal IAB node design where each node can function both as a parent and child node in the hierarchy. The IAB nodes have standardized interfaces and protocols for establishing direct links with terminals and other IAB nodes. This multi-functionality reduces system complexity by using identical node designs throughout the network rather than requiring specialized hardware for different hierarchical levels.
Data Source
AI summary
The purpose of the present disclosure is to deliver a vehicle-to-vehicle (V2V) message in a wireless communication system. An operation method of an integrated access and backhaul (IAB) node may comprise the steps of: establishing a directlink connection with a terminal; receiving data including an event message from the terminal through the directlink connection; and transmitting system information including the event message to at least one terminal.