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Indian Institute of Technology (IIT) Patna 
Kumar, N., Mondal, A. 
Corresponding Authors:
Niraj Kumar 
DOI #: 
Timing Analysis of Precedence Constraint Messages Scheduled with Slot Multiplexing over Dynamic Segment of FlexRay  
IEEE Transactions on Automation Science and Engineering  
17( 1 ) 
222 - 236 
Automotive vehicles, dynamic segment, end-toend delay (EED), Flexray, slot multiplexing (SM) 
FlexRay offers high-speed reliable transmission in the vehicle domain. Thus, it is one of the most popular in-vehicle communication protocols for the applications that are safety-critical or applications with very low transmission time requirement. Due to the real-time constraint, the worst case end-to-end delay (EED) for such applications transmitting over a shared bus must be known. This paper addresses the problem of computation of EED for a given set of tasks with precedence constraint and corresponding messages, which are scheduled with slot multiplexing for event-triggered communication over the dynamic segment of FlexRay. First, computing precise delay has been shown to be an intractable problem. Subsequently, motivated by the intractability, an efficient estimation technique has been proposed to compute approximate EED. Unlike the common practice of considering the network in isolation, we present a comprehensive timing analysis, which considers the effects of task execution as well. Moreover, EED is allowed to be greater than interactivation time of task graph. The extensive simulation has been performed on the test cases generated with uniform as well as normal distribution. 
Entered by:
Venkata Dantham on 2020-08-04 
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