Message scheduling for real-time interprocessor communication

2015 ◽  
Vol 61 (8) ◽  
pp. 374-382
Author(s):  
Stefan Waldherr ◽  
Sigrid Knust ◽  
Stefan Aust
Keyword(s):  
Real Time ◽  
Interprocessor Communication ◽  
Message Scheduling

scholarly journals MESSAGE SCHEDULING ON CAN BUS FOR SHIP ENGINE SYSTEMS

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Favian Dewanta ◽  
Dong-Sung Kim ◽  
Rendy Munadi
Keyword(s):  
Real Time ◽  
Can Bus ◽  
Control Unit ◽  
Networked Control System ◽  
Buffer Occupancy ◽  
Message Type ◽  
Message Scheduling ◽  
Important Message ◽  
Message Frame ◽  
Engine Systems

This paper reports novel algorithm for handling real time message scheduling on CAN bus which consider buffer occupancy and message type (alarm, periodic real time and non real time). This algorithm is derived to reduce burden of the distributed control unit (DCU) which have obligation to deliver message within strict time and also manage buffer storage occupancy. The algorithm works by changing the message priority which is attached in the identifier field of message frame. The priority adjustment is performed by online calculation prior to send the message on the CAN bus. Finally, this proposed algorithm is applied on ship engine systems which consist of certain number of DCUs. In this networked control system, the proposed algorithm can decrease buffer overflow. Furthermore, the important message alarm and periodic real time message can be delivered within the deadline.Keywords: CAN Bus, message scheduling, DCU

Real-time message scheduling for ISA100.11a networks

2015 ◽  
Vol 37 ◽  
pp. 73-79 ◽  
Author(s):  
Tran Nhon ◽  
Dong-Seong Kim
Keyword(s):  
Real Time ◽  
Message Scheduling

scholarly journals Protecting Clock Synchronization: Adversary Detection through Network Monitoring

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Elena Lisova ◽  
Marina Gutiérrez ◽  
Wilfried Steiner ◽  
Elisabeth Uhlemann ◽  
Johan Åkerberg ◽  
...  
Keyword(s):  
Real Time ◽  
Clock Synchronization ◽  
Safety Critical ◽  
Ieee 1588 ◽  
Industrial Networks ◽  
Message Scheduling ◽  
Address Resolution Protocol ◽  
Core Property ◽  
Man In The Middle ◽  
Time Requirements

Nowadays, industrial networks are often used for safety-critical applications with real-time requirements. Such applications usually have a time-triggered nature with message scheduling as a core property. Scheduling requires nodes to share the same notion of time, that is, to be synchronized. Therefore, clock synchronization is a fundamental asset in real-time networks. However, since typical standards for clock synchronization, for example, IEEE 1588, do not provide the required level of security, it raises the question of clock synchronization protection. In this paper, we identify a way to break synchronization based on the IEEE 1588 standard, by conducting a man-in-the-middle (MIM) attack followed by a delay attack. A MIM attack can be accomplished through, for example, Address Resolution Protocol (ARP) poisoning. Using the AVISPA tool, we evaluate the potential to perform a delay attack using ARP poisoning and analyze its consequences showing both that the attack can, indeed, break clock synchronization and that some design choices, such as a relaxed synchronization condition mode, delay bounding, and using knowledge of environmental conditions, can make the network more robust/resilient against these kinds of attacks. Lastly, a Configuration Agent is proposed to monitor and detect anomalies introduced by an adversary performing attacks targeting clock synchronization.

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