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Publications (10 of 16) Show all publications
Li, J., Shen, X., Chen, L., Ou, J., Wosinska, L. & Chen, J. (2019). Delay-aware bandwidth slicing for service migration in mobile backhaul networks. Journal of Optical Communications and Networking, 11(4), B1-B9
Open this publication in new window or tab >>Delay-aware bandwidth slicing for service migration in mobile backhaul networks
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2019 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 11, no 4, p. B1-B9Article in journal (Refereed) Published
Abstract [en]

Fog computing is expected to be integrated with communication infrastructure, giving rise to the con­cept of fog-enhanced radio access networks (FeRANs) to support various mission-critical applications. Such archi­tecture brings computation capabilities closer to end users, thereby reducing the communication latency to access ser­vices. In the context of FeRAN, service migration is needed to tackle limited resources in a single fog node and to pro­vide continuous service for mobile end users. To support service migration, high capacity and low latency are required in mobile backhaul networks. Passive optical net­works can be a promising solution for such mobile back-haul, in which bandwidth is shared by both migration traffic and that which is not associated with service migra­tion. In this paper, we propose a bandwidth slicing mecha­nism, in which the bandwidth can be provisioned to the migration traffic and non-migration traffic dynamically and effectively to meet their different delay requirements. Simulation results verify that the proposed delay-aware bandwidth slicing scheme can handle the migration traffic properly, i.e., sending it within a required time threshold, while limiting the impact of the migration traffic on the latency and jitter of the non-migration traffic, particularly that with high priority.

Keywords
Bandwidth, Optical network units, Channel allocation, Delays, Quality of service, Base stations, Passive optical networks, Bandwidth slicing, Fog computing, Mobile backhaul, Service migration
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38604 (URN)10.1364/JOCN.11.0000B1 (DOI)
Available from: 2019-05-09 Created: 2019-05-09 Last updated: 2019-05-09Bibliographically approved
Li, J., Shen, X., Chen, L., Pham Van, D., Ou, J., Wosinska, L. & Chen, J. (2019). Service Migration in Fog Computing Enabled Cellular Networks to Support Real-Time Vehicular Communications. IEEE Access, 7, 13704-13714, Article ID 8620320.
Open this publication in new window or tab >>Service Migration in Fog Computing Enabled Cellular Networks to Support Real-Time Vehicular Communications
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2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 7, p. 13704-13714, article id 8620320Article in journal (Refereed) Published
Abstract [en]

Driven by the increasing number of connected vehicles and related services, powerful communication and computation capabilities are needed for vehicular communications, especially for real-time and safety-related applications. A cellular network consists of radio access technologies, including the current long-term evolution (LTE), the LTE advanced, and the forthcoming 5th generation mobile communication systems. It covers large areas and has the ability to provide high data rate and low latency communication services to mobile users. It is considered the most promising access technology to support real-time vehicular communications. Meanwhile, fog is an emerging architecture for computing, storage, and networking, in which fog nodes can be deployed at base stations to deliver cloud services close to vehicular users. In fog computing-enabled cellular networks, mobility is one of the most critical challenges for vehicular communications to maintain the service continuity and to satisfy the stringent service requirements, especially when the computing and storage resources are limited at the fog nodes. Service migration, relocating services from one fog server to another in a dynamic manner, has been proposed as an effective solution to the mobility problem. To support service migration, both computation and communication techniques need to be considered. Given the importance of protocol design to support the mobility of the vehicles and maintain high network performance, in this paper, we investigate the service migration in the fog computing-enabled cellular networks. We propose a quality-of-service aware scheme based on the existing handover procedures to support the real-time vehicular services. A case study based on a realistic vehicle mobility pattern for Luxembourg scenario is carried out, where the proposed scheme, as well as the benchmarks, are compared by analyzing latency and reliability as well as migration cost.

Keywords
Connected vehicles, fog computing, service migration, 4G mobile communication systems, Digital storage, Fog, Long Term Evolution (LTE), Mobile telecommunication systems, Quality of service, Radio access networks, Radio broadcasting, Vehicles, Wireless networks, Communication techniques, Critical challenges, Emerging architectures, Low-latency communication, Radio access technologies, Service requirements, Vehicular communications
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37938 (URN)10.1109/ACCESS.2019.2893571 (DOI)2-s2.0-85061733224 (Scopus ID)
Note

Funding details: Göran Gustafssons Stiftelse för Naturvetenskaplig och Medicinsk Forskning; Funding details: Natural Science Foundation of Guangdong Province, 508206351021; Funding details: National Natural Science Foundation of China, NSFC, 61671212, 61550110240; Funding text 1: This work was supported in part by the Göran Gustafssons Stiftelse, in part by the Natural Science Foundation of Guangdong Province under Grant 508206351021, and in part by the National Natural Science Foundation of China under Grant 61550110240 and Grant 61671212.

Available from: 2019-03-05 Created: 2019-03-05 Last updated: 2019-03-05Bibliographically approved
Chen, L. & Englund, C. (2018). Every Second Counts: Integrating Edge Computing and Service Oriented Architecture for Automatic Emergency Management. Journal of Advanced Transportation, 2018, Article ID 7592926.
Open this publication in new window or tab >>Every Second Counts: Integrating Edge Computing and Service Oriented Architecture for Automatic Emergency Management
2018 (English)In: Journal of Advanced Transportation, ISSN 0197-6729, E-ISSN 2042-3195, Vol. 2018, article id 7592926Article in journal (Refereed) Published
Abstract [en]

Emergency management has long been recognized as a social challenge due to the criticality of the response time. In emergency situations such as severe traffic accidents, minimizing the response time, which requires close collaborations between all stakeholders involved and distributed intelligence support, leads to greater survival chance of the injured. However, the current response system is far from efficient, despite the rapid development of information and communication technologies. This paper presents an automated collaboration framework for emergency management that coordinates all stakeholders within the emergency response system and fully automates the rescue process. Applying the concept of multiaccess edge computing architecture, as well as choreography of the service oriented architecture, the system allows seamless coordination between multiple organizations in a distributed way through standard web services. A service choreography is designed to globally model the emergency management process from the time an accident occurs until the rescue is finished. The choreography can be synthesized to generate detailed specification on peer-to-peer interaction logic, and then the specification can be enacted and deployed on cloud infrastructures.

Keywords
Accidents, Architecture, Civil defense, Computation theory, Computer architecture, Disasters, Distributed computer systems, Edge computing, Emergency services, Information services, Response time (computer systems), Risk management, Specifications, Web services, Collaboration framework, Computing architecture, Distributed intelligence, Emergency response systems, Information and Communication Technologies, Multiple organizations, Peer-to-peer interaction, Service choreographies, Service oriented architecture (SOA)
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33461 (URN)10.1155/2018/7592926 (DOI)2-s2.0-85042465118 (Scopus ID)
Note

 Funding details: H2020-644178; Funding text: T his work is supported by the EU H2020 Project CHOReV-OLUTION Automated Synthesis of Dynamic and Secured Choreographies for the Future Internet with Project no. H2020-644178.

Available from: 2018-03-09 Created: 2018-03-09 Last updated: 2019-07-01Bibliographically approved
Zhang, X., Song, X., Feng, L., Chen, L. & Törngren, M. (2017). A case study on achieving fair data age distribution in vehicular communications. In: Proceedings of the IEEE Real-Time and Embedded Technology and Applications Symposium, RTAS: . Paper presented at 23rd IEEE Real-Time and Embedded Technology and Applications Symposium, RTAS 2017, 18 April 2017 through 20 April 2017 (pp. 307-317).
Open this publication in new window or tab >>A case study on achieving fair data age distribution in vehicular communications
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2017 (English)In: Proceedings of the IEEE Real-Time and Embedded Technology and Applications Symposium, RTAS, 2017, p. 307-317Conference paper, Published paper (Refereed)
Abstract [en]

In vehicular communication protocol stacks, received messages may not always be decoded successfully due to the complexity of the decoding functions, the uncertainty of the communication load and the limited computation resources. Even worse, an improper implementation of the protocol stack may cause an unfair data age distribution among all the communicating vehicles (the receiving bias problem). In such cases, some vehicles are almost locked out of the vehicular communication, causing potential safety risk in scenarios such as intersection passing. To our knowledge, this problem has not been systematically studied in the fields of vehicular communication and intelligent transport systems (ITS). This paper analyzes the root of the receiving bias problem and proposes architectural solutions to balance data age distribution. Simulation studies based on commercial devices demonstrate the effectiveness of these solutions. In addition, our system has been successfully applied during the Grand Cooperative Driving Challenge, where complicated scenarios involving platooning maneuvering and intersection coordination were conducted.

Keywords
Decoding, Intelligent systems, Maneuverability, Risk perception, Traffic control, Architectural solutions, Commercial Devices, Communicating vehicles, Computation resources, Cooperative driving, Intelligent transport systems, Simulation studies, Vehicular communications, Intelligent vehicle highway systems
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-30881 (URN)10.1109/RTAS.2017.7 (DOI)2-s2.0-85021802444 (Scopus ID)9781509052691 (ISBN)
Conference
23rd IEEE Real-Time and Embedded Technology and Applications Symposium, RTAS 2017, 18 April 2017 through 20 April 2017
Available from: 2017-09-07 Created: 2017-09-07 Last updated: 2018-08-14Bibliographically approved
Chen, L. & Englund, C. (2017). Choreographing Services for Smart Cities: Smart Traffic Demonstration. In: : . Paper presented at Vehicular Technology Conference (VTC Spring), 2017 IEEE 85th.4-7 June 2017. Sydney, NSW, Australia. , Article ID 8108625.
Open this publication in new window or tab >>Choreographing Services for Smart Cities: Smart Traffic Demonstration
2017 (English)Conference paper, Published paper (Refereed)
Abstract [en]

With the fifth generation (5G) communication technologies on the horizon, the society is rapidly transformed into a fully connected world. The Future Internet (FI) is foreseeable to consist of an infinite number of software components and things that coordinate with each other to enable different applications. Transport systems, as one of the most important systems in future smart cities, will embrace the connectivity, together with the fast development of cooperative and automated vehicles to enable smart traffic. To facilitate this transformation, a service choreography composition platform is under development to enable fast innovation and prototyping of choreography-based Internet of Things (IoT) applications by automatically synthesizing choreographies. Based on the method, a smart traffic application is developed and demonstrated.

National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-33104 (URN)10.1109/VTCSpring.2017.8108625 (DOI)2-s2.0-85040562694 (Scopus ID)
Conference
Vehicular Technology Conference (VTC Spring), 2017 IEEE 85th.4-7 June 2017. Sydney, NSW, Australia
Available from: 2018-01-16 Created: 2018-01-16 Last updated: 2019-01-07Bibliographically approved
Chen, L. & Englund, C. (2016). CHOREM: Choreographing services for emergency managemen. In: ITS World Congress 2016: . Paper presented at 23th World Congress on Intelligent Transportation Systems, October 10-14, 2016, Melbourne, Australia.
Open this publication in new window or tab >>CHOREM: Choreographing services for emergency managemen
2016 (English)In: ITS World Congress 2016, 2016Conference paper, Published paper (Refereed)
National Category
Software Engineering
Identifiers
urn:nbn:se:ri:diva-27834 (URN)
Conference
23th World Congress on Intelligent Transportation Systems, October 10-14, 2016, Melbourne, Australia
Available from: 2017-01-11 Created: 2017-01-11 Last updated: 2019-06-13Bibliographically approved
Chen, L. & Englund, C. (2016). Cooperative Intersection Management: A Survey. IEEE transactions on intelligent transportation systems (Print), 17(2), 570-586, Article ID 7244203.
Open this publication in new window or tab >>Cooperative Intersection Management: A Survey
2016 (English)In: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 17, no 2, p. 570-586, article id 7244203Article in journal (Refereed) Published
Abstract [en]

Intersection management is one of the most challenging problems within the transport system. Traffic light-based methods have been efficient but are not able to deal with the growing mobility and social challenges. On the other hand, the advancements of automation and communications have enabled cooperative intersection management, where road users, infrastructure, and traffic control centers are able to communicate and coordinate the traffic safely and efficiently. Major techniques and solutions for cooperative intersections are surveyed in this paper for both signalized and nonsignalized intersections, whereas focuses are put on the latter. Cooperative methods, including time slots and space reservation, trajectory planning, and virtual traffic lights, are discussed in detail. Vehicle collision warning and avoidance methods are discussed to deal with uncertainties. Concerning vulnerable road users, pedestrian collision avoidance methods are discussed. In addition, an introduction to major projects related to cooperative intersection management is presented. A further discussion of the presented works is given with highlights of future research topics. This paper serves as a comprehensive survey of the field, aiming at stimulating new methods and accelerating the advancement of automated and cooperative intersections.

Keywords
C-ITS, Cooperative intelligent traffic systems, V2I, V2P, V2V, V2X, VANET, collision avoidance, cooperative intersection management, mathematical optimization, motion planning, multi-agent system, trajectory planning
National Category
Communication Systems Robotics Telecommunications
Identifiers
urn:nbn:se:ri:diva-27833 (URN)10.1109/TITS.2015.2471812 (DOI)
Available from: 2017-01-11 Created: 2017-01-11 Last updated: 2019-06-13Bibliographically approved
Englund, C., Chen, L., Ploeg, J., Semsar-Kazerooni, E., Voronov, A., Hoang Bengtsson, H. & Didoff, J. (2016). The Grand Cooperative Driving Challenge (GCDC) 2016: boosting the introduction of Cooperative Automated Vehicles. IEEE wireless communications, 23(4), 146-152
Open this publication in new window or tab >>The Grand Cooperative Driving Challenge (GCDC) 2016: boosting the introduction of Cooperative Automated Vehicles
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2016 (English)In: IEEE wireless communications, ISSN 1536-1284, E-ISSN 1558-0687, Vol. 23, no 4, p. 146-152Article in journal (Refereed) Published
Abstract [en]

The Grand Cooperative Driving Challenge (GCDC), with the aim to boost the introduction of cooperative automated vehicles by means of wireless communication, is presented. Experiences from the previous edition of GCDC, which was held in Helmond in the Netherlands in 2011, are summarized, and an overview and expectations of the challenges in the 2016 edition are discussed. Two challenge scenarios, cooperative platoon merge and cooperative intersection passing, are specified and presented. One demonstration scenario for emergency vehicles is designed to showcase the benefits of cooperative driving. Communications closely follow the newly published cooperative intelligent transport system standards, while interaction protocols are designed for each of the scenarios. For the purpose of interoperability testing, an interactive testing tool is designed and presented. A general summary of the requirements on teams for participating in the challenge is also presented.

Keywords
Intelligent vehicles, Road traffic, Standards, Protocols, Wireless communication, Acceleration, Collaboration
National Category
Computer Vision and Robotics (Autonomous Systems)
Identifiers
urn:nbn:se:ri:diva-27841 (URN)10.1109/MWC.2016.7553038 (DOI)
Available from: 2017-01-11 Created: 2017-01-11 Last updated: 2019-06-19Bibliographically approved
Chen, L., Habibovic, A., Englund, C., Voronov, A. & Walter, A. (2015). Coordinating Dangerous Goods Vehicles: C-ITS Applications for Safe Road Tunnels. In: 2015 IEEE Intelligent Vehicles Symposium (IV): . Paper presented at IEEE Intelligent Vehicles Symposium (IV 2015), June 28 - July 1, 2015, Seoul, South Korea (pp. 156-161). , Article ID 7225679.
Open this publication in new window or tab >>Coordinating Dangerous Goods Vehicles: C-ITS Applications for Safe Road Tunnels
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2015 (English)In: 2015 IEEE Intelligent Vehicles Symposium (IV), 2015, p. 156-161, article id 7225679Conference paper, Published paper (Refereed)
Abstract [en]

Despite the existing regulation efforts and measures, vehicles with dangerous goods still pose significant risks on public safety, especially in road tunnels. Solutions based on cooperative intelligent transportation system (C-ITS) are promising measures, however, they have received limited attention. We propose C-ITS applications that coordinate dangerous goods vehicles to minimize the risk by maintaining safe distances between them in road tunnels. Different mechanisms, including global centralized coordination, global distributed coordination, and local coordination, are proposed and investigated. A preliminary simulation is performed and demonstrates their effectiveness.

National Category
Communication Systems
Identifiers
urn:nbn:se:ri:diva-27836 (URN)10.1109/IVS.2015.7225679 (DOI)978-1-4673-7266-4 (ISBN)
Conference
IEEE Intelligent Vehicles Symposium (IV 2015), June 28 - July 1, 2015, Seoul, South Korea
Available from: 2017-01-11 Created: 2017-01-11 Last updated: 2019-07-10Bibliographically approved
Englund, C., Chen, L., Vinel, A. & Shih Yang, L. (2015). Future Applications of VANETs. In: Claudia Campolo, Antonella Molinaro, Riccardo Scopigno (Ed.), Vehicular ad hoc Networks: Standards, Solutions, and Research, Part V. Paper presented at Monday, September 21, 2015 (pp. 525-544). Paper presented at Monday, September 21, 2015. Springer Publishing Company
Open this publication in new window or tab >>Future Applications of VANETs
2015 (English)In: Vehicular ad hoc Networks: Standards, Solutions, and Research, Part V / [ed] Claudia Campolo, Antonella Molinaro, Riccardo Scopigno, Springer Publishing Company, 2015, p. 525-544Chapter in book (Other academic)
Abstract [en]

Current transportation systems face great challenges due to the increasing mobility. Traffic accidents, congestion, air pollution, etc., are all calling for new methods to improve the transportation system. With the US legislation in progress over vehicle communications and EU’s finalization of the basic set of standards over cooperative intelligent transportation systems (C-ITS), vehicular ad hoc network (VANET) based applications are expected to address those challenges and provide solutions for a safer, more efficient and sustainable future intelligent transportation systems (ITS). In this chapter, transportation challenges are firstly summarized in respect of safety, efficiency, environmental threat, etc. A brief introduction of the VANET is discussed along with state of the art of VANET-based applications. Based on the current progress and the development trend of VANET, a number of new features of future VANET are identified, together with a set of potential future ITS applications. The on-going research and field operational test projects, which are the major enabling efforts for the future VANET-based C-ITS, are presented. The chapter is of great interest to readers working within ITS for current development status and future trend within the C-ITS area. It is also of interest to general public for an overview of the VANET enabled future transportation system.

Place, publisher, year, edition, pages
Springer Publishing Company, 2015
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-24594 (URN)10.1007/978-3-319-15497-8_18 (DOI)978-3-319-15496-1 (ISBN)978-3-319-15497-8 (ISBN)
Conference
Monday, September 21, 2015
Projects
i-GAME
Available from: 2016-11-01 Created: 2016-10-31 Last updated: 2018-08-14Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-0908-1483

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