Vehicle Platoon Joining via Query-Invitation Signaling
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Solution Overview
Problem
In vehicle-based wireless communication networks, particularly in V2X systems, the half-duplex communication scheme can lead to vehicles missing platoon announcements or failing to properly receive and decode messages when trying to join or interact with existing platoons, due to simultaneous transmission and reception limitations.
Innovation Solution
A robust signaling approach is implemented, where vehicles broadcast query messages and receive invitation messages with wireless resource information, allowing them to join platoons reliably by using unicast signaling and diverse transmission methods to overcome half-duplex limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If half-duplex communication scheme is used in V2X systems, then device complexity is reduced, but reliability of message transmission deteriorates due to vehicles missing platoon announcements or failing to properly receive and decode messages
Solution Approach 1:
The patent applies preliminary action by having vehicles broadcast query messages before attempting to join a platoon. This allows the vehicle to proactively seek platoon information and establish communication resources in advance, ensuring that subsequent join requests and platoon announcements can be reliably exchanged without the half-duplex limitation causing message loss.
Solution Approach 2:
The patent introduces an intermediary mechanism through the use of dedicated query messages, invitation messages, and joining request messages that mediate the joining process. These intermediary communications establish a reliable exchange protocol that overcomes the half-duplex constraint by creating a structured sequence of transmissions and receptions with designated time slots and resource allocations.
2Reliability
If vehicles broadcast query messages and use unicast signaling to join platoons, then reliability of joining process is improved, but quantity of signaling messages increases
Solution Approach 1:
The patent segments the platoon joining process into distinct phases with specific message types: query message phase, invitation message phase, and joining request message phase. This segmentation allows each message to have a focused function and enables the system to manage the signaling sequence efficiently, reducing redundant transmissions while maintaining reliability.
Solution Approach 2:
The patent implements periodic action through the structured sequence of message exchanges where vehicles periodically broadcast query messages and platoon leaders periodically respond with invitation messages. This periodic pattern creates predictable communication intervals that reduce the overall signaling load compared to continuous or random message transmissions.
Data Source
AI summary
Aspects of the disclosure relate to mechanisms and algorithms for a vehicle to join a vehicle group. The vehicle may transmit a query message that includes an identifier, and includes vehicle course information. In response, the vehicle may receive an invitation message that includes a group identifier, group course information, and wireless resource information for joining a vehicle group. The vehicle may then transmit a joining request message, including the first group identifier.