There are competing technologies for V2X implementation. Dedicated Short Range Communications (DSRC) radios overcome frequency selective fading, shadowing and high-speed hand-over difficulties, and use 802.11p to accelerate data exchange by reducing initial handshake and association. SCALABLE’s customers have been using EXata’s 802.11p wireless emulation with real DSRC radios in-the-loop to greatly reduce testing space requirements, time and cost. A challenge to DSRC comes from the cellular industry in the form of C-V2X, which uses LTE and will upgrade to 5G. C-V2X promises performance advantages over DSRC, but has not been as extensively tested, which implies further delays that would be unacceptable to the automotive industry, with its priorities to improve driver assistance systems and develop autonomous vehicles. How can C-V2X testing be shortened? DSRC and C-V2X may need to coexist, but how will interoperability and interference be tested? SCALABLE’s wireless simulation that includes urban environments, vehicle mobility, fading, shadowing, path loss and interference, and our models of 802.11p, LTE, Thread, Bluetooth and 5G provide the answer. Our tools reveal details about network performance at every layer of the stack, to locate problems in various environments and scenarios and improve safety on the road.
Network Modeling Capabilities
Our network modeling capabilities will help with researching security, interoperability of devices, radio interference or network congestion that could affect safety, cyber vulnerability, performance, liability, and other issues. A preliminary version of our model is already in use in the USA and Asia to support this research, and we are starting to see interest from vehicle manufacturers to acquire our network tools to assist the development of their systems.
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Network Simulation Models for the Virtual World
The Korean Automotive Technology Institute (KATECH) has selected EXata to integrate with their driving simulator. EXata will provide simulation models of the communications, using its built-in Wireless Access in a Vehicular Environment (WAVE, 802.11p) protocol model, and also models interference, fading, and path loss in rural and urban environments. Wireshark is used with EXata for packet sniffing, and to check the performance and interoperability of actual WAVE devices.
The system makes use of EXata’s scalability and simulation modeling and analysis capabilities and can represent scenarios with thousands of vehicles. EXata is helping KATECH investigate and solve many vehicle communications development issues in their lab with our network tools, by representing multiple real-world environments without the risk of accidents using computer network models. The savings to KATECH in terms of cost, set-up time, analysis time, and physical space for testing are significant and the safety it will provide is invaluable.
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EXata is a comprehensive suite of tools designed for network emulation of large wired and wireless networks. It uses network emulation and simulation models to predict the behavior and performance of networks to improve their design, operation, and management. EXata provides a cost-effective and easy-to-use alternative to physical testbeds that typically have high equipment costs, complex setup requirements and limited scalability.
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QualNet is a planning, testing and training tool that “mimics” the behavior of a real communications network. Simulation models are a cost-effective tool for developing, deploying and managing network-centric systems throughout their entire lifecycle. Users can evaluate the basic behavior of a network, and test combinations of network features that are likely to work using simulation models. Our network simulator software tool provides a comprehensive environment for designing protocols, creating and animating network scenarios, and analyzing their performance.