Impact of sensor nodes scaling and velocity on handover mechanisms for healthcare wireless sensor networks with mobility support |
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| Affiliation: | 1. Instituto de Telecomunicações, University of Beira Interior, Polytechnic Institute of Castelo Branco, Rua Marquês D’Ávila e Bolama, 6201-001 Covilhã, Portugal;2. Instituto de Telecomunicações, University of Beira Interior, Rua Marquês D’Ávila e Bolama, 6201-001 Covilhã, Portugal;3. University ITMO, Kronverkskiy pr, 49, 197101 St. Petersburg, Russia;4. University of Haute Alsace – IUT, 34 rue du Grillenbreit, 68008 Colmar, France;5. CISTER Research Unit, ISEP/IPP, Rua Dr. Antonio Bernardino de Almeida, 431, 4200-072 Porto, Portugal;1. Jo?ef Stefan Institute, Ljubljana, Slovenia;2. University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia;1. Jo?ef Stefan Institute, Department of Systems and Control, Jamova 39, SI-1000 Ljubljana, Slovenia;2. Inea d.o.o. Stegne 11, SI-1000 Ljubljana, Slovenia;3. Helios, Tovarna barv, lakov in umetnih smol Koli?evo, d.o.o. Koli?evo 65, SI-1230 Dom?ale, Slovenia;4. Jo?ef Stefan International Postgraduate School, Jamova 39, SI-1000 Ljubljana, Slovenia;1. Department of Industrial and System Engineering/Engineering Research Institute, Gyeongsang National University, South Korea;2. Department of Industrial Engineering, Changwon National University, South Korea;1. Tsinghua National Laboratory for Information Science and Technology, Research Institute of Information Technology, Tsinghua University, No. 1 Tsinghua Yuan, Beijing 10084, China;2. Fuwai Hospital, Chinese Academy of Medical Science, North Lishi Road, Xicheng District, Beijing 100037, China;3. Beijing University of Posts and Telecommunications, Beijing 100876, China;4. IBISC Laboratory, University of Evry, 23 Bd de France, 91034 Évry, France |
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| Abstract: | Health promotion in hospital environments can be improved using the most recent information and communication technologies. The Internet connectivity to small sensor nodes carried by patients allows remote access to their bio-signals. To promote these features the healthcare wireless sensor networks (HWSN) are used. In these networks mobility support is a key issue in order to keep patients under real-time monitoring even when they move around. To keep sensors connected to the network, they should change their access points of attachment when patients move to a new coverage area along an infirmary. This process, called handover, is responsible for continuous network connectivity to the sensors. This paper presents a detailed performance evaluation study considering three handover mechanisms for healthcare scenarios (Hand4MAC, RSSI-based, and Backbone-based). The study was performed by simulation using several scenarios with different number of sensors and different moving velocities of sensor nodes. The results show that Hand4MAC is the best solution to guarantee almost continuous connectivity to sensor nodes with less energy consumption. |
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| Keywords: | Body sensor networks Healthcare applications Healthcare wireless sensor networks Mobile health e-Health Mobility |
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