miun.sePublications
Change search
Refine search result
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Gidlund, Mikael
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Yang, Dong
    Beijing Jiatong University.
    Xu, Youzhi
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Shen, Wei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Wireless communication method and system with collision avoidance protocol2012Patent (Other (popular science, discussion, etc.))
    Abstract [en]

    The invention concerns a method for providing wireless communication between a source node and a destination node in a wireless network wherein said wireless network uses a time division multiple access (TDMA) protocol. One or more dedicated TDMA transaction timeslots (60-71) are arranged in a superframe. The superframe comprises at least one dedicated transaction slot forming a hybrid protocol with two or more shared transaction slots 50 per superframe. The method is of particular advantage when practised with a WirelessHART protocol wireless sensor network and when used for monitoring and control equipment and processes in an industrial installation. A computer program, and a wireless node and a wireless network using the inventive method are also disclosed.

  • 2.
    Hongwei, Huo
    et al.
    Beijing Jiaotong University.
    Wei, Shen
    Data Communication, JTH, Jönköping University, Sweden.
    A Virtual Hypercube Routing Algorithm for Wireless Healthcare Networks2010In: Chinese journal of electronics, ISSN 1022-4653, E-ISSN 2075-5597, Vol. 19, no 1E, p. 138-144Article in journal (Refereed)
    Abstract [en]

    Abstract|The application scenarios of wireless sensornetworks for health care systems are very complex, whichrequire a new communication schemes that can dynami-cally ful¯ll these requirements and achieve e±cient datatransmission. It brings a big challenge to routing, accesscontrol, data transmission, storage and processing. Thispaper presents a novel routing scheme named Virtual hy-percube routing (VHR), in which the routing selection andmaintenance rules are de¯ned based on a logical hypercubestructure. It can highlight good performance in data trans-fer rate and query e±ciency. Based on this structure, therouting for health care can be implemented e±ciently. Weevaluate the performance of VHR using simulation underhome and public area care scenarios. The results show thatthis scheme performs high data transfer rate, low latencyand low overhead for communication under both static anddynamic scenarios.

  • 3.
    Johansson, A.
    et al.
    Department of Electrical Engineering, School of Engineering, Jonkoping University, Sweden.
    Shen, Wei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Xu, Y.
    Department of Electrical Engineering, School of Engineering, Jonkoping University, Sweden.
    An ANT based wireless body sensor biofeedback network for medical E-health care2011In: 7th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2011, Wuhan: IEEE conference proceedings, 2011, p. Art. no. 6040656-Conference paper (Refereed)
    Abstract [en]

    This paper presents an ultra low power wireless insole sensor biofeedback and gait analysis system for rehabilitation of balance control for post stroke patients and gait related rehabilitation. The system integrates ANT wireless protocol, a wireless home E-health care sensor network and open-source mobile device technology. The paper also presents methods to time synchronize the two sole sensors. The system has been evaluated and it shows good performance in power consumption, communication latency, coexistence with WiFi/BlueTooth/GSM. © 2011 IEEE.

  • 4.
    Shen, Wei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    A Protocol Framework for Adaptive Real-Time Communication in Industrial Wireless Sensor and Actuator Networks2014Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Low-power and resource-constrained wireless technology has been regarded as an emerging technology that introduces a paradigm shift in a wide range of applications such as industrial automation, smart grid, home automation and so on. The automation industry has significant contributions to economic revenues, job opportunities and world-class research. The low-power and resource-constrained wireless technology has brought new opportunity and challenges for industrial automation. The solutions of such wireless technology offer benefits in relation to lower cost and more flexible deployments/maintenances than the wired solutions, and new applications that are not possible with wired communication. However, these wireless solutions have been introducing new challenges. Wireless links are inherently unreliable, especially in industrial harsh environment, and wireless interference makes the problem even worse. Low-power consumption is required and real-time communication is generally crucial in industrial automation applications.

    This research work addresses that industrial wireless sensor and actuator network (IWSAN) should even be designed to provide service differentiation for wireless medium access and adapt to link dynamics for scheduling algorithms on top of real-time services. Specifically, exceeding the required delay bound for unpredictable and emergency traffic in industrial automation applications could lead to system instability, economic and material losses, system failure and, ultimately, a threat to human safety. Therefore, guaranteeing the timely delivery of the IWSAN critical traffic and its prioritization over regular traffic (e.g. non-critical monitoring traffic) is a significant topic. In addition, the state-of-the-art researches address a multitude of objectives for scheduling algorithms in IWSAN. However, the adaptation to the dynamics of a realistic wireless sensor network has not been investigated in a satisfactory manner. This is a key issue considering the challenges within industrial applications, given the time-constraints and harsh environments.

    In response to those challenges, a protocol framework for adaptive real-time communication in IWSAN is proposed. It mainly consists of a priority-based medium access protocol (MAC) and its extension for routing critical traffic, a hybrid scheme for acyclic traffic, and adaptive scheduling algorithms. To the best of our knowledge, the priority-based MAC solution is the first priority-enhanced MAC protocol compatible with industrial standards for IWSAN. The proposed solutions have been implemented in TinyOS and evaluated on a test-bed of Telosb motes and the TOSSIM network simulator. The experimental results indicate that the proposed priority-based solutions are able to efficiently handle different traffic categories and achieve a significant improvement in the delivery latency. The hybrid scheme for acyclic traffic increases the throughput and reduces the delay compared to the current industrial standards. Numerical results show that the adaptive scheduling algorithms improve the quality of service for the entire network. They achieve significant improvements for realistic dynamic wireless sensor networks when compared to existing scheduling algorithms with the aim to minimize latency for real-time communication.

  • 5.
    Shen, Wei
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Barac, Filip
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Gidlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science. ABB Corporate Research, SE-72178 Vasteras, Sweden.
    PriorityMAC: A Priority-Enhanced MAC Protocol for Critical Traffic in Industrial Wireless Sensor and Actuator Networks2014In: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 10, no 1, p. 824-835Article in journal (Refereed)
    Abstract [en]

    This paper proposes PriorityMAC, a priority-enhanced medium access control protocol, designed for critical traffic in industrial wireless sensor and actuator networks (IWSAN). A notable trend in industrial automation in recent years has been the replacement of wired communication by IWSANs. Exceeding the required delay bound for unpredictable and emergency traffic could lead to system instability, economic and material losses, system failure, and, ultimately, a threat to human safety. Guaranteeing the timely delivery of the IWSAN critical traffic and its prioritization over regular traffic (e.g., noncritical monitoring traffic) is a significant challenge. Therefore, we present the design, implementation, performance analysis, and evaluation of PriorityMAC. A series of novel mechanisms (e.g., high priority indication space) are proposed to enable high-priority traffic to hijack the transmission bandwidth of the low-priority traffic. To the best of our knowledge, this is the first priority-enhanced MAC protocol compatible with industrial standards for IWSAN. PriorityMAC is implemented in TinyOS and evaluated on a testbed of Telosb motes. The experimental results indicate that PriorityMAC efficiently handles different traffic categories with different latency requirements, thereby achieving a significant improvement in the delivery latency compared with the current industrial standards. © 2005-2012 IEEE.

  • 6.
    Shen, Wei
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Gidlund, Mikael
    ABB Corporate Research.
    Distributed Data Gathering Scheduling Protocol for Wireless Sensor Actor and Actuator Networks2012In: Communications (ICC), 2012 IEEE International Conference on, IEEE Communications Society, 2012, p. 7120-7125Conference paper (Refereed)
    Abstract [en]

    This paper presents a cross-layer distributed scheduling protocol for sensor data gathering transmission inwireless sensor actor and actuator networks. We propose the parent-dominant decision scheduling with collision free (PDDS-CF) algorithm to adapt the dynamics of links in a realistic low-power wireless network. In addition, the protocol has a light-weight mechanism to maintain the conflict links. We have evaluated the protocol andimplementation in TinyOS and Telosb hardware. The experiment shows that our protocol has robustness to the topology changes and it has significant improvements to reduce the traffic load in realistic wireless networks.

  • 7.
    Shen, Wei
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Gidlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Joint Routing and MAC for Critical Traffic in Industrial Wireless Sensor and Actuator Networks2013In: IEEE International Symposium on Industrial Electronics, 2013, p. Art. no. 6563730-Conference paper (Refereed)
    Abstract [en]

    This paper proposes Delay Bounded Routing (DBR) and a Priority-based Medium Access Control method (PriorityMAC), designed for routing critical traffic in Industrial Wireless Sensor and Actuator Networks (IWSAN). A notable trend in industrial automation in recent years is the replacement of wired communication with IWSAN. Exceeding the required delay bound for unpredictable and emergency traffic could lead to system instability, economic and material losses, system failure and, ultimately, a threat to human safety. Guaranteeing the timely delivery of the critical traffic and its prioritization over regular traffic (e. g. non-critical monitoring traffic) is a significant challenge. Therefore, we present the design, implementation and evaluation of DBR and PriorityMAC. DBR and PriorityMAC are implemented in TinyOS and evaluated on a testbed of Telosb motes. The experimental results indicate that our protocol achieves a significant improvement of the end-to-end delivery latency compared to the current industrial standards.

  • 8.
    Shen, Wei
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Gidlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems. ABB Corp Res, Vasterås, Sweden.
    Dobslaw, Felix
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    SAS-TDMA: A Source Aware Scheduling Algorithm for Real-Time Communication in Industrial Wireless Sensor Networks2013In: Wireless networks, ISSN 1022-0038, E-ISSN 1572-8196, Vol. 19, no 6, p. 1155-1170Article in journal (Refereed)
    Abstract [en]

    Scheduling algorithms play an importantrole for TDMA-based wireless sensor networks. ExistingTDMA scheduling algorithms address a multitude of objectives.However, their adaptation to the dynamics of a realistic wirelesssensor network has not been investigated in a satisfactorymanner. This is a key issue considering the challenges withinindustrial applications for wireless sensor networks, given thetime-constraints and harsh environments.In response to those challenges, we present SAS-TDMA, asource-aware scheduling algorithm. It is a cross-layer solutionwhich adapts itself to network dynamics. It realizes a tradeoffbetween scheduling length and its configurational overheadincurred by rapid responses to routes changes. We implementeda TDMA stack instead of the default CSMA stack and introduceda cross-layer for scheduling in TOSSIM, the TinyOS simulator.Numerical results show that SAS-TDMA improves the qualityof service for the entire network. It achieves significant improvementsfor realistic dynamic wireless sensor networks whencompared to existing scheduling algorithms with the aim tominimize latency for real-time communication.

  • 9.
    Shen, Wei
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Xu, Youzhi
    Computer and Electrical Engineering Department, School of Engineering, Jönköping University, Jönköping, Sweden.
    Xie, Donghua
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Johansson, Alf
    Computer and Electrical Engineering Department, School of Engineering, Jönköping University, Jönköping, Sweden.
    Smart Border Routers for eHealthCare Wireless Sensor Networks2011In: The 7th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM), IEEE conference proceedings, 2011, p. 1-4Conference paper (Refereed)
    Abstract [en]

    With advances in low-power and low-cost wireless and sensor technologies, using WSNs in eHealthCare system has yielded tremendous efforts in recent years. However, most of previous researches adopt a remote server to process large scale of health sensor data forwarded by gateways that allow for interconnecting WSNs to IP network. In this paper, we present a prototype of a smart 6LoWPAN border router aimed to locally make decisions of health states using a Hidden Markov Model and enable wireless E-health care sensor network to seamlessly connect with IP network.

  • 10.
    Yang, D
    et al.
    Beijing Jiatong University, PR China.
    Gidlund, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems. ABB Corporate Research.
    Shen, Wei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Xu, Youzhi
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Zhang, Tingting
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Zhang, Honke
    Beijing Jiatong University, PR China.
    CCA-Embedded TDMA Enabling Acyclic Traffic in Industrial Wireless Sensor Networks2013In: Ad hoc networks, ISSN 1570-8705, E-ISSN 1570-8713, Vol. 11, no 3, p. 1105-1121Article in journal (Refereed)
    Abstract [en]

    A growing trend in the automation industry is to use wireless technologies to reduce cable costs and deployment time, unlock stranded information in deployed devices and enable wireless control applications. The WirelessHART protocol is the first open and interoperable industrial wireless sensor network standard, which proposes a combination of time division multiple access (TDMA) and channel hopping as a medium access control (MAC) protocol. TDMA is a schedule-based protocol, which is suitable for predictable cyclic traffic. However, for burst acyclic traffic, TDMA degenerates into an inefficient slotted ALOHA. In this article, we propose a complementary mechanism to TDMA, CCA-Embedded TDMA, which can be applied to improve the transmission efficiency and system stability of TDMA-based systems such as the WirelessHART protocol. A Markov model is proposed to evaluate the efficiency of system throughput and expected delay of CCA-Embedded TDMA. Furthermore, we show by analytical and simulation results that our proposed CCA-Embedded TDMA scheme can increase the throughput by 100% and reduce the expected delay by 75% for a common scenario. We also implement CCA-Embedded TDMA into an embedded system as a part of the WirelessHART MAC protocol. The experimental results verify the efficiency of CCA-Embedded TDMA and its backward compatibility with the WirelessHART protocol.

1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf