73 research outputs found
Software-Defined Networks Supporting Time-Sensitive In-Vehicular Communication
Future in-vehicular networks will be based on Ethernet. The IEEE
Time-Sensitive Networking (TSN) is a promising candidate to satisfy real-time
requirements in future car communication. Software-Defined Networking (SDN)
extends the Ethernet control plane with a programming option that can add much
value to the resilience, security, and adaptivity of the automotive
environment. In this work, we derive a first concept for combining
Software-Defined Networking with Time-Sensitive Networking along with an
initial evaluation. Our measurements are performed via a simulation that
investigates whether an SDN architecture is suitable for time-critical
applications in the car. Our findings indicate that the control overhead of SDN
can be added without a delay penalty for the TSN traffic when protocols are
mapped properly.Comment: To be published at IEEE VTC2019-Sprin
Simulation of Mixed Critical In-vehicular Networks
Future automotive applications ranging from advanced driver assistance to
autonomous driving will largely increase demands on in-vehicular networks. Data
flows of high bandwidth or low latency requirements, but in particular many
additional communication relations will introduce a new level of complexity to
the in-car communication system. It is expected that future communication
backbones which interconnect sensors and actuators with ECU in cars will be
built on Ethernet technologies. However, signalling from different application
domains demands for network services of tailored attributes, including
real-time transmission protocols as defined in the TSN Ethernet extensions.
These QoS constraints will increase network complexity even further.
Event-based simulation is a key technology to master the challenges of an
in-car network design. This chapter introduces the domain-specific aspects and
simulation models for in-vehicular networks and presents an overview of the
car-centric network design process. Starting from a domain specific description
language, we cover the corresponding simulation models with their workflows and
apply our approach to a related case study for an in-car network of a premium
car
DoS Protection through Credit Based Metering -- Simulation-Based Evaluation for Time-Sensitive Networking in Cars
Ethernet is the most promising solution to reduce complexity and enhance the
bandwidth in the next generation in-car networks. Dedicated Ethernet protocols
enable the real-time aspects in such networks. One promising candidate is the
IEEE 802.1Q Time-Sensitive Networking protocol suite. Common Ethernet
technologies, however, increases the vulnerability of the car infrastructure as
they widen the attack surface for many components. In this paper proposes an
IEEE 802.1Qci based algorithm that on the one hand, protects against DoS
attacks by metering incoming Ethernet frames. On the other hand, it adapts to
the behavior of the Credit Based Shaping algorithm, which was standardized for
Audio/Video Bridging, the predecessor of Time-Sensitive Networking. A
simulation of this proposed Credit Based Metering algorithm evaluates the
concept.Comment: If you cite this paper, please use the original reference: P. Meyer,
T. H\"ackel, F. Korf, and T. C. Schmidt. DoS Protection through Credit Based
Metering - Simulation Based Evaluation for Time-Sensitive Networking in Cars.
In: \emph{Proceedings of the 6th International OMNeT++ Community Summit}.
September, 2019, Easychai
SDN4CoRE: A Simulation Model for Software-Defined Networking for Communication over Real-Time Ethernet
Ethernet has become the next standard for automotive and industrial
automation networks. Standard extensions such as IEEE 802.1Q Time-Sensitive
Networking (TSN) have been proven to meet the real-time and robustness
requirements of these environments. Augmenting the TSN switching by
Software-Defined Networking functions promises additional benefits: A
programming option for TSN devices can add much value to the resilience,
security, and adaptivity of the environment. Network simulation allows to model
highly complex networks before assembly and is an essential process for the
design and validation of future networks. Still, a simulation environment that
supports programmable real-time networks is missing. This paper fills the gap
by sharing our simulation model for Software-Defined Networking for
Communication over Real-Time Ethernet (SDN4CoRE) and present initial results in
modeling programmable real-time networks. In a case study, we show that
SDN4CoRE can simulate complex programmable real-time networks and allows for
testing and verifying the programming of real-time devices.Comment: If you cite this paper, please use the original reference: T.
H\"ackel, P. Meyer, F. Korf, and T. C. Schmidt. SDN4CoRE: A Simulation Model
for Software-Defined Networking for Communication over Real-Time Ethernet.
In: Proceedings of the 6th International OMNeT++ Community Summit. September,
2019, Easychai
Authenticated and Secure Automotive Service Discovery with DNSSEC and DANE
Automotive softwarization is progressing and future cars are expected to
operate a Service-Oriented Architecture on multipurpose compute units, which
are interconnected via a high-speed Ethernet backbone. The AUTOSAR architecture
foresees a universal middleware called SOME/IP that provides the service
primitives, interfaces, and application protocols on top of Ethernet and IP.
SOME/IP lacks a robust security architecture, even though security is an
essential in future Internet-connected vehicles. In this paper, we augment the
SOME/IP service discovery with an authentication and certificate management
scheme based on DNSSEC and DANE. We argue that the deployment of well-proven,
widely tested standard protocols should serve as an appropriate basis for a
robust and reliable security infrastructure in cars. Our solution enables
on-demand service authentication in offline scenarios, easy online updates, and
remains free of attestation collisions. We evaluate our extension of the common
vsomeip stack and find performance values that fully comply with car
operations
A QoS Aware Approach to Service-Oriented Communication in Future Automotive Networks
Service-Oriented Architecture (SOA) is about to enter automotive networks
based on the SOME/IP middleware and an Ethernet high-bandwidth communication
layer. It promises to meet the growing demands on connectivity and flexibility
for software components in modern cars. Largely heterogeneous service
requirements and time-sensitive network functions make Quality-of-Service (QoS)
agreements a vital building block within future automobiles. Existing
middleware solutions, however, do not allow for a dynamic selection of QoS.
This paper presents a service-oriented middleware for QoS aware communication
in future cars. We contribute a protocol for dynamic QoS negotiation along with
a multi-protocol stack, which supports the different communication classes as
derived from a thorough requirements analysis. We validate the feasibility of
our approach in a case study and evaluate its performance in a simulation model
of a realistic in-car network. Our findings indicate that QoS aware
communication can indeed meet the requirements, while the impact of the service
negotiations and setup times of the network remain acceptable provided the
cross-traffic during negotiations stays below 70% of the available bandwidth
Updated International Tuberous Sclerosis Complex Diagnostic Criteria and Surveillance and Management Recommendations
Background: Tuberous sclerosis complex (TSC) is an autosomal dominant genetic disease affecting multiple body systems with wide variability in presentation. In 2013, Pediatric Neurology published articles outlining updated diagnostic criteria and recommendations for surveillance and management of disease manifestations. Advances in knowledge and approvals of new therapies necessitated a revision of those criteria and recommendations. Methods: Chairs and working group cochairs from the 2012 International TSC Consensus Group were invited to meet face-to-face over two days at the 2018 World TSC Conference on July 25 and 26 in Dallas, TX, USA. Before the meeting, working group cochairs worked with group members via e-mail and telephone to (1) review TSC literature since the 2013 publication, (2) confirm or amend prior recommendations, and (3) provide new recommendations as required. Results: Only two changes were made to clinical diagnostic criteria reported in 2013: “multiple cortical tubers and/or radial migration lines” replaced the more general term “cortical dysplasias,” and sclerotic bone lesions were reinstated as a minor criterion. Genetic diagnostic criteria were reaffirmed, including highlighting recent findings that some individuals with TSC are genetically mosaic for variants in TSC1 or TSC2. Changes to surveillance and management criteria largely reflected increased emphasis on early screening for electroencephalographic abnormalities, enhanced surveillance and management of TSC-associated neuropsychiatric disorders, and new medication approvals. Conclusions: Updated TSC diagnostic criteria and surveillance and management recommendations presented here should provide an improved framework for optimal care of those living with TSC and their families
The Fourth International Symposium on Genetic Disorders of the Ras/MAPK pathway
The RASopathies are a group of disorders due to variations of genes associated with the Ras/MAPK pathway. Some of the RASopathies include neurofibromatosis type 1 (NF1), Noonan syndrome, Noonan syndrome with multiple lentigines, cardiofaciocutaneous (CFC) syndrome, Costello syndrome, Legius syndrome, and capillary malformation–arteriovenous malformation (CM-AVM) syndrome. In combination, the RASopathies are a frequent group of genetic disorders. This report summarizes the proceedings of the 4th International Symposium on Genetic Disorders of the Ras/MAPK pathway and highlights gaps in the field
Updated international tuberous sclerosis complex diagnostic criteria and surveillance and management recommendations
Background
Tuberous sclerosis complex (TSC) is an autosomal dominant genetic disease affecting multiple body systems with wide variability in presentation. In 2013, Pediatric Neurology published articles outlining updated diagnostic criteria and recommendations for surveillance and management of disease manifestations. Advances in knowledge and approvals of new therapies necessitated a revision of those criteria and recommendations.
Methods
Chairs and working group cochairs from the 2012 International TSC Consensus Group were invited to meet face-to-face over two days at the 2018 World TSC Conference on July 25 and 26 in Dallas, TX, USA. Before the meeting, working group cochairs worked with group members via e-mail and telephone to (1) review TSC literature since the 2013 publication, (2) confirm or amend prior recommendations, and (3) provide new recommendations as required.
Results
Only two changes were made to clinical diagnostic criteria reported in 2013: “multiple cortical tubers and/or radial migration lines” replaced the more general term “cortical dysplasias,” and sclerotic bone lesions were reinstated as a minor criterion. Genetic diagnostic criteria were reaffirmed, including highlighting recent findings that some individuals with TSC are genetically mosaic for variants in TSC1 or TSC2. Changes to surveillance and management criteria largely reflected increased emphasis on early screening for electroencephalographic abnormalities, enhanced surveillance and management of TSC-associated neuropsychiatric disorders, and new medication approvals.
Conclusions
Updated TSC diagnostic criteria and surveillance and management recommendations presented here should provide an improved framework for optimal care of those living with TSC and their families
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