mdh.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Ashjaei, Seyed Mohammad HosseinORCID iD iconorcid.org/0000-0003-3469-1834
Alternative names
Publications (10 of 41) Show all publications
Cao, J., Ashjaei, S. M., Cuijpers, P. J. .., J. Bril, R. & Lukkien, J. (2018). An Independent yet Efficient Analysis of Bandwidth Reservation for Credit-based Shaping in Ethernet TSN. In: International Workshop on Factory Communication Systems WFCS'18: . Paper presented at International Workshop on Factory Communication Systems WFCS'18, 13 Jun 2018, Imperia, Italy (pp. 1-10). Imperia, Italy
Open this publication in new window or tab >>An Independent yet Efficient Analysis of Bandwidth Reservation for Credit-based Shaping in Ethernet TSN
Show others...
2018 (English)In: International Workshop on Factory Communication Systems WFCS'18, Imperia, Italy, 2018, p. 1-10Conference paper, Published paper (Refereed)
Abstract [en]

Ethernet TSN is an upcoming communication standard for industrial distributed embedded systems with high demands on bandwidth and traffic delay. In this paper, we present and prove an improved analysis to determine bandwidth reservations for credit based shapers in a single Ethernet TSN switch. We compare this new analysis, which is based on eligible intervals, to the state-of-the-art bandwidth reservation analysis based on busy periods through experiments. Despite its low complexity and the independence of the knowledge of the interfering traffic, the results show an improvement of efficiency, i.e., a decrease of the required bandwidth, for the new analysis.

Place, publisher, year, edition, pages
Imperia, Italy: , 2018
National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38966 (URN)10.1109/WFCS.2018.8402345 (DOI)2-s2.0-85050016783 (Scopus ID)978-1-5386-1066-4 (ISBN)
Conference
International Workshop on Factory Communication Systems WFCS'18, 13 Jun 2018, Imperia, Italy
Projects
Future factories in the Cloud
Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-08-16Bibliographically approved
Iqbal, Z., Almeida, L. & Ashjaei, S. M. (2018). Analyzing the Efficiency of Sporadic Reservations on Ethernet with FTT-SE. In: International Conference on Emerging Technologies And Factory Automation ETFA'17: . Paper presented at International Conference on Emerging Technologies And Factory Automation ETFA'17, 12 Aug 2017, Limassol, Cyprus.
Open this publication in new window or tab >>Analyzing the Efficiency of Sporadic Reservations on Ethernet with FTT-SE
2018 (English)In: International Conference on Emerging Technologies And Factory Automation ETFA'17, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Ethernet is a promising candidate for networking real-time embedded systems such as automobiles, and it is already used in several embedded scopes, such as airplanes and trains. Moreover, its higher bandwidth enables applications made of dispersed embedded systems that exchange large amounts of data through the so-called Internet-of-Things, such as wide-area video sensing. In this realm, network reservations are an important design element that favor composability in the time domain thereby supporting the design of complex systems. However, reservations may impact negatively on the network bandwidth efficiency due to over-specification, particularly when they are designed to meet worst-case delay constraints. In this work, we use a specific Ethernet protocol that provides real-time reservations, namely FTT-SE, and we assess through extensive simulations the efficiency of a worst-case network delay analysis for sporadic reservations associated to asynchronous messages. Essentially, we compare the analytical worst-case delay with the one observed in the simulations using two data sets comprising up to 20000 and 100000 message sets, respectively, and we change the system configuration, namely properties of the message sets and network and protocol configuration parameters. We find that the analysis is accurate, i.e. matches observations, for a significant percentage of messages in the message sets (up to 60% on average). Conversely, we found that a small percentage of message sets (below 6%) generated rather pessimistic analytic estimates exceeding the observations by 6 times, thus with a negative impact on efficiency. The results we present in the paper, particularly their distributions, inform system designers of how to tune their designs to improve network bandwidth efficiency under strict timing constraints.

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-35515 (URN)10.1109/ETFA.2017.8247607 (DOI)000427812000042 ()2-s2.0-85044444451 (Scopus ID)9781509065059 (ISBN)
Conference
International Conference on Emerging Technologies And Factory Automation ETFA'17, 12 Aug 2017, Limassol, Cyprus
Projects
PRESS - Predictable Embedded Software Systems
Available from: 2017-06-01 Created: 2017-06-01 Last updated: 2018-12-03Bibliographically approved
Girs, S. & Ashjaei, S. M. (2018). Designing a Bandwidth Management Scheme for Heterogeneous Virtualized Networks. In: International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18: . Paper presented at International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 04 Sep 2018, Torino, Italy (pp. 1079-1082). , Article ID 8502450.
Open this publication in new window or tab >>Designing a Bandwidth Management Scheme for Heterogeneous Virtualized Networks
2018 (English)In: International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 2018, p. 1079-1082, article id 8502450Conference paper, Published paper (Refereed)
Abstract [en]

With envisioned increased density and complexity of future industrial networks, software defined networking (SDN) and network virtualization are considered to be promising techniques for network organization and management. Thus, in this paper we look at heterogeneous software defined networks consisting of several virtual slices and present a bandwidth control algorithm, which is designed to provide control over shared bandwidth both in wired and wireless parts of the network. The designed algorithm has been implemented in real hardware and in this paper we present the initial test results.

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-40888 (URN)10.1109/ETFA.2018.8502450 (DOI)000449334500139 ()2-s2.0-85057233622 (Scopus ID)9781538671085 (ISBN)
Conference
International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 04 Sep 2018, Torino, Italy
Projects
Future factories in the Cloud
Available from: 2018-09-18 Created: 2018-09-18 Last updated: 2018-12-27Bibliographically approved
Ashjaei, S. M., Khalilzad, N. & Mubeen, S. (2018). Modeling, Designing and Analyzing Resource Reservations in Distributed Embedded Systems. In: Springer (Ed.), Real-Time Modelling and Processing for Communication Systems: (pp. 203-256). Springer
Open this publication in new window or tab >>Modeling, Designing and Analyzing Resource Reservations in Distributed Embedded Systems
2018 (English)In: Real-Time Modelling and Processing for Communication Systems / [ed] Springer, Springer , 2018, p. 203-256Chapter in book (Other academic)
Place, publisher, year, edition, pages
Springer, 2018
National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38618 (URN)10.1007/978-3-319-72215-3_9 (DOI)2-s2.0-85057289909 (Scopus ID)978-3-319-72214-6 (ISBN)978-3-319-72215-3 (ISBN)
Projects
PRESS - Predictable Embedded Software SystemsFuture factories in the Cloud
Available from: 2018-03-06 Created: 2018-03-06 Last updated: 2019-04-11Bibliographically approved
Danielsson, J., Ashjaei, S. M., Behnam, M., Sörensen, T., Sjödin, M. & Nolte, T. (2018). Performance Evaluation of Network Convergence Time Measurement Techniques. In: International Conference on Emerging Technologies And Factory Automation ETFA'17: . Paper presented at International Conference on Emerging Technologies And Factory Automation ETFA'17, 12 Aug 2017, Limassol, Cyprus (pp. 1-7).
Open this publication in new window or tab >>Performance Evaluation of Network Convergence Time Measurement Techniques
Show others...
2018 (English)In: International Conference on Emerging Technologies And Factory Automation ETFA'17, 2018, p. 1-7Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we evaluate solutions that provide measurements for the network convergence time in switched Ethernet networks when links failures happen. We evaluate three solutions to measure the network convergence time in a faulty situation. Compared to the commercially available solutions, our proposals are cost-effective, portable, and open source. Thus, they are easy to deploy on many testbeds. We show the performance of the solutions by measuring different metrics including jitter, network convergence time and packet loss during the network recovery time. Our measurements indicate that it is possible to accurately measure the network convergence time using a packet sender which does not suffer interference from the overlying operating system. Furthermore, we noticed that the packet sniffer TShark did not suffer from kernel interrupts from overlying operating systems.

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-37010 (URN)10.1109/ETFA.2017.8247600 (DOI)000427812000035 ()2-s2.0-85044482968 (Scopus ID)9781509065059 (ISBN)
Conference
International Conference on Emerging Technologies And Factory Automation ETFA'17, 12 Aug 2017, Limassol, Cyprus
Projects
DPAC - Dependable Platforms for Autonomous systems and Control
Available from: 2017-11-27 Created: 2017-11-27 Last updated: 2018-04-05Bibliographically approved
Aglianò, S., Ashjaei, S. M., Behnam, M. & Lo Bello, L. (2018). Resource Management and Control in Virtualized SDN Networks. In: CSI International Symposium on Real-Time and Embedded Systems and Technologies REST'18: . Paper presented at CSI International Symposium on Real-Time and Embedded Systems and Technologies REST'18, 09 May 2018, Tehran, Iran (pp. 47-53).
Open this publication in new window or tab >>Resource Management and Control in Virtualized SDN Networks
2018 (English)In: CSI International Symposium on Real-Time and Embedded Systems and Technologies REST'18, 2018, p. 47-53Conference paper, Published paper (Refereed)
Abstract [en]

Software defined networking and network virtual-ization are widely considered promising techniques for reducing the complexity of network management in many contexts that require high Quality of Service (QoS) and the support for heterogeneous architectures. In this paper we address a network architecture, here called a virtualized SDN network, that combines the benefits of SDN and virtualization. To cope with the demand for efficiently sharing a platform among several services, here a resource management mechanism to reserve and control network resources among various services in the virtualized SDN networks is proposed. The mechanism is implemented on an SDN controller and a set of experiments show the effectiveness of the proposed approach.

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38641 (URN)10.1109/RTEST.2018.8397078 (DOI)2-s2.0-85050505349 (Scopus ID)9781538614754 (ISBN)
Conference
CSI International Symposium on Real-Time and Embedded Systems and Technologies REST'18, 09 May 2018, Tehran, Iran
Projects
Future factories in the Cloud
Available from: 2018-03-02 Created: 2018-03-02 Last updated: 2018-08-16Bibliographically approved
Ashjaei, S. M., Clegg, K., Corneo, L., Hawkins, R., Jaradat, O., Gulisano, V. & Nikolakopoulos, Y. (2018). Service Level Agreements for Safe and Configurable Production Environments. In: International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18: . Paper presented at International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 04 Sep 2018, Torino, Italy (pp. 1252-1255). , Article ID 8502568.
Open this publication in new window or tab >>Service Level Agreements for Safe and Configurable Production Environments
Show others...
2018 (English)In: International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 2018, p. 1252-1255, article id 8502568Conference paper, Published paper (Refereed)
Abstract [en]

This paper focuses on Service Level Agreements (SLAs) for industrial applications that aim to port some of the control functionalities to the cloud. In such applications, industrial requirements should be reflected in SLAs. In this paper, we present an approach to integrate safety-related aspects of an industrial application to SLAs. We also present the approach in a use case. This is an initial attempt to enrich SLAs for industrial settings to consider safety aspects, which has not been investigated thoroughly before.

National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-40884 (URN)10.1109/ETFA.2018.8502568 (DOI)000449334500177 ()2-s2.0-85057241752 (Scopus ID)9781538671085 (ISBN)
Conference
International Conference on Emerging Technologies and Factory Automation - Work in Progress Session ETFA-WiP'18, 04 Sep 2018, Torino, Italy
Projects
XPRES - Excellence in Production ResearchFuture factories in the Cloud
Available from: 2018-09-18 Created: 2018-09-18 Last updated: 2018-12-27Bibliographically approved
Ashjaei, M., Khalilzad, N., Mubeen, S., Behnam, M., Sander, I., Almeida, L. & Nolte, T. (2017). Designing End-to-end Resource Reservations in Predictable Distributed Embedded Systems. Real-time systems, 53(6), 916-956
Open this publication in new window or tab >>Designing End-to-end Resource Reservations in Predictable Distributed Embedded Systems
Show others...
2017 (English)In: Real-time systems, ISSN 0922-6443, E-ISSN 1573-1383, Vol. 53, no 6, p. 916-956Article in journal (Refereed) Published
Abstract [en]

Contemporary distributed embedded systems in many domains have become highly complex due to ever-increasing demand on advanced computer controlled functionality. The resource reservation techniques can be effective in lowering the software complexity, ensuring predictability and allowing flexibility during the development and execution of these systems. This paper proposes a novel end-to-end resource reservation model for distributed embedded systems. In order to support the development of predictable systems using the proposed model, the paper provides a method to design resource reservations and an end-to-end timing analysis. The reservation design can be subjected to different optimization criteria with respect to runtime footprint, overhead or performance. The paper also presents and evaluates a case study to show the usability of the proposed model, reservation design method and end-to-end timing analysis. 

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-35506 (URN)10.1007/s11241-017-9283-6 (DOI)000412536700004 ()2-s2.0-85020515685 (Scopus ID)
Projects
PRESS - Predictable Embedded Software SystemsFuture factories in the CloudPreView: Developing Predictable Vehicle Software on Multi-core
Available from: 2017-05-31 Created: 2017-05-31 Last updated: 2018-07-25Bibliographically approved
Ashjaei, S. M. & Bengtsson, M. (2017). Enhancing Smart Maintenance Management Using Fog Computing Technology. In: 2017 International Conference on Industrial Engineering and Engineering Management IEEM: . Paper presented at 2017 International Conference on Industrial Engineering and Engineering Management IEEM, 10 Dec 2017, Singapore, Singapore (pp. 1561-1565).
Open this publication in new window or tab >>Enhancing Smart Maintenance Management Using Fog Computing Technology
2017 (English)In: 2017 International Conference on Industrial Engineering and Engineering Management IEEM, 2017, p. 1561-1565Conference paper, Published paper (Refereed)
Abstract [en]

In order for factories to stay competitive in the current open global market, there should be efforts to put on optimizing the value stream of producing goods. Within this context, Industrial Internet of Things (IIoT) has been emerged as a technology aiming at achieving high productivity performance in manufacturing. A smart manufacturing approach also requires a smart maintenance management as it plays a crucial role in securing the productivity. IIoT applications are traditionally completed by the cloud computing technology to serve the required services. In this paper, we argue that maintenance processes have requirements that cannot be accomplished by solely the cloud computing technology. We identify several of these requirements. Then, we propose a platform using the fog computing technology, as a recently raised technology in IIoT, to enhance the smart maintenance management. We also discuss the ability of the platform in fulfilling the identified requirements.

Series
International Conference on Industrial Engineering and Engineering Management IEEM, ISSN 2157-3611
Keywords
Smart maintenance; Cloud Computing; Fog Computing; Industry 4.0; Smart factory
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:mdh:diva-37046 (URN)000428267800317 ()2-s2.0-85045251407 (Scopus ID)
Conference
2017 International Conference on Industrial Engineering and Engineering Management IEEM, 10 Dec 2017, Singapore, Singapore
Projects
XPRES - Excellence in Production ResearchFuture factories in the Cloud
Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2018-04-26Bibliographically approved
Mubeen, S., Abbaspour Asadollah, S., Papadopoulos, A., Ashjaei, S. M., Pei-Breivold, H. & Behnam, M. (2017). Management of Service Level Agreements for Cloud Services in IoT: A Systematic Mapping Study. IEEE Access (99)
Open this publication in new window or tab >>Management of Service Level Agreements for Cloud Services in IoT: A Systematic Mapping Study
Show others...
2017 (English)In: IEEE Access, E-ISSN 2169-3536, no 99Article in journal (Refereed) Published
Abstract [en]

Cloud computing and Internet of Things (IoT) are computing technologies that provide services to consumers and businesses, allowing organizations to become more agile and flexible. Therefore, ensuring Quality of Service (QoS) through Service Level Agreements (SLAs) for such cloud-based services is crucial for both the service providers and service consumers. As SLAs are critical for cloud deployments and wider adoption of cloud services, the management of SLAs in cloud and IoT has thus become an important and essential aspect. This paper investigates the existing research on the management of SLAs in IoT applications that are based on cloud services. For this purpose, a Systematic Mapping study (a well-defined method) is conducted to identify the published research results that are relevant to SLAs. The paper identifies 328 primary studies and categorizes them into seven main technical classifications: SLA management, SLA definition, SLA modeling, SLA negotiation, SLA monitoring, SLA violation and trustworthiness, and SLA evolution. The paper also summarizes the research types, research contributions, and demographic information in these studies. The evaluation of the results show that most of the approaches for managing SLAs are applied in academic or controlled experiments with limited industrial settings rather than in real industrial environments. Many studies focus on proposal models and methods to manage SLAs, and there is a lack of focus on the evolution perspective and a lack of adequate tool support to facilitate practitioners in their SLA management activities. Moreover, the scarce number of studies focusing on concrete metrics for qualitative or quantitative assessment of QoS in SLAs urges the need for in-depth research on metrics definition and measurements for SLAs.

Place, publisher, year, edition, pages
United States: IEEE, 2017
Keywords
Service-level agreements, SLAs, internet of things, IoT, industrial IoT, IIoT, cloud computing, systematic mapping study
National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-37059 (URN)10.1109/ACCESS.2017.2744677 (DOI)000436432700001 ()2-s2.0-85028713917 (Scopus ID)
Projects
XPRES - Excellence in Production ResearchDPAC - Dependable Platforms for Autonomous systems and ControlFuture factories in the CloudSprint 12 Project: SLA-IoT--Ensuring Quality of Service through Modeling of Service-level Agreements in Industrial IoTSprint 13 Project: SLA-IoT - Ensuring Quality of Service through Modeling of Service-level Agreements in Industrial IoT
Available from: 2017-10-27 Created: 2017-10-27 Last updated: 2018-07-12Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3469-1834

Search in DiVA

Show all publications