Network Modeling

Intelligent Transportation - V2X Communications

SCALABLE provides unique network modeling and simulation software to commercial enterprises, government and defense agencies, research organizations and educational institutions around the world. Our software enables customers to analyze and predict network performance of communication technologies prior to deployment. It lowers development costs by drastically reducing time to test wireless network performance, reliability and security under varying environmental conditions, including urban environments with thousands of moving vehicles.

One way that customers utilize SCALABLE’s network modeling and simulation tools is to make vehicles safer. Intelligent Transportation Systems, which include vehicle-to-vehicle and vehicle-to-infrastructure communications, is a new technology to improve safety on the road by relaying information between vehicles to help reduce collisions and loss of life. These systems can make drivers (human or autonomous) aware of dangers that exist outside their visual or sensory field-of-view, for example a vehicle speeding toward a red light in an intersection your own vehicle is about to cross.

In V2X communications, interoperability is crucial. The technology must also operate with extreme reliability in a very dynamic environment, with high relative speeds, very low latency for dynamic connections and safety-critical message receipt, in crowded urban environments with interfering signals.

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 - V2X

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.

For info on Linking Technology and Transportation Read More

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.

Network Modeling
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.

For info on EXata Read More

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.

For info on QualNet Read More

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.