Dual Connectivity Backup Links for Reliable V2X Under Deep Fading
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Solution Overview
Problem
Existing wireless communication systems, particularly in vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communications, face reliability issues due to deep fading and blockage, which advanced coding and modulation schemes cannot adequately address, especially in high-frequency bands like 5.9 GHz and millimeter waves.
Innovation Solution
A dual connectivity scheme is implemented, utilizing a backup transmission link with differentiated protection levels (hot, warm, and cold standbys) managed by cross-layer control and scheduling, using a new QoS indicator to ensure reliability and latency, and applying the same or different radio access technologies (RAT) for primary and backup links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If advanced coding and modulation schemes are used, then signaling processing capability is improved, but reliability under deep fading and blockage conditions deteriorates
Solution Approach 1:
The communication system is segmented into multiple independent transmission links (primary and backup links) operating on different frequencies or carriers. This segmentation allows the system to bypass deep fading or blockage affecting a single link by switching to or combining with another link, thereby resolving the contradiction between processing capability and reliability under adverse channel conditions.
Solution Approach 2:
The system changes operational parameters by switching between different transmission links with different frequency characteristics when deep fading or blockage is detected. This parameter change (frequency/carrier switching) allows maintaining communication reliability despite the limitations of advanced coding schemes under specific channel conditions.
2Reliability
If backup transmission links are implemented, then communication reliability is improved, but system complexity and resource overhead increase
Solution Approach 1:
The backup link configuration is made dynamic rather than static. The system dynamically activates or deactivates backup links based on real-time channel conditions, reliability requirements, and resource availability. This dynamic approach maintains high reliability when needed while reducing system complexity and resource overhead during normal operation.
Solution Approach 2:
Different levels of backup protection are applied locally to different data flows or services based on their specific reliability requirements. Critical communications receive full backup protection while less critical traffic uses simplified or no backup, thereby achieving overall system reliability without uniformly increasing complexity across all transmissions.
3Productivity
If differentiated protection levels are applied, then resource utilization efficiency is improved, but control complexity increases
Solution Approach 1:
The system performs preliminary classification of data traffic into different protection level categories before transmission. By pre-defining protection levels and associated resource allocation rules, the system automates resource allocation decisions, improving resource utilization efficiency while managing control complexity through standardized pre-configured policies rather than real-time complex optimization.
Data Source
AI summary
Embodiments of a system and method for dual connectivity for device to vehicle or vehicle to vehicle communication in a Wireless Network are generally described herein. In some embodiments, processing circuitry may determine a quality of service (QoS) level for data to be transmitted over a first radio access technology (RAT) connection and determine a QoS indicator from the QoS level, the QoS indicator identifying a dual connectivity backup transmission, the dual connectivity backup transmission including a hot, warm, or cold backup. In some embodiments, transceiver circuitry may attempt to transmit the data using a first transmission mode, the first transmission mode using the first RAT connection and the data including the QoS indicator and retransmit, in response to the attempt failing, the data using a second transmission mode.