A Safe and Reliable Method for Installing Wireless LAN into a Hospital

  • Hanada, Eisuke (Division of Medical Informatics, Shimane University Hospital) ;
  • Kudou, Takato (Department of Electrical and Electronic Engineering, Faculty of Engineering, Oita University)
  • Received : 2011.05.16
  • Published : 2011.12.31


A medical environment in which patient information can be accessed anytime / anywhere is called a "ubiquitous environment". To realize such an environment, the installation of wireless LAN is quite effective. Because the maximum radio wave output (antenna power) is set low in Japan, it has been easy to safely introduce wireless LAN into hospitals, to date mainly into large hospitals. However, if the placement of access points is not done properly, problems will occur, such as signals not reaching the desired area. A solution to these types of problems is to do an electromagnetic-field propagation simulation, which should be performed before construction of the hospital. It is also necessary to protect against security problems, such as signal interception or illegal access. We herein show our procedures for the safe introduction of wireless LAN.


Wireless LAN;Electromagnetic Propagation Simulation;Shielding;Security;User Education


Supported by : Japan Society for the Promotion of Science


  1. Electromagnetic Compatibility Committee (Japan), Research Report of the usage of radio-communication equipment such as cellular telephone handsets, Japan, Association of Radio Industries and Business; 1997.
  2. The Ministry of Internal Affairs and Communication (Japan) : Investigation of the Effects of Radio Waves on Medical Equipment etc( Reffered on Sep. 2010.
  3. E. Hanada, Y. Hoshino, and T. Kudou, "Safe introduction of in-hospital wireless LAN," Medinfo 2004, pp. 1426-1429, 2004.
  4. E. Hanada, Y. Watanabe, Y. Antoku, Y. Kenjo, H. Nutahara, and Y. Nose, "Hospital construction materials: Poor shielding capacity with respect to signals transmitted by mobile telephones," Biomedical In. Strumentation & Technology, vol. 35, no. 4, pp. 489- 496, 1998.
  5. Z. Ji , B-H. Li, H-X. Wang, H-Y. Chen, and T. K. Sarkar, "Efficient ray-tracing methods for propagation prediction for indoor wireless communications," IEEE Antennas and Propagation Magazine, vol. 43, no. 2, pp. 41-49, 2001.
  6. R. Hoppe, P. Wertz, F. M. Landstorfer, and G. Wolfle, "Advanced ray-optical wave propagation modelling for urban and indoor scenarios including wideband properties," European Transactions on Telecommunications, vol. 14, no. 1, pp. 61-69, 2003.
  7. K. S. Yee, "Numerical solution of initial boundary value problems involving maxwell's equations in isotropic media," IEEE Transactions on Antenna Propagation, vol. 14, no. 3, pp. 302-307, 1966.
  8. G. Woelfle, F. M. Landstorfer, "Dominant paths for the field strength prediction," 48th IEEE Vehicular Technology Conference (VTC) 1998, pp. 552-556, 1998.
  9. Minisry of Healsth, Labor and Welfare (Japan) Guidelines for Safety Management of Medical Information Systems Ver. 4.1 (in Japanese), p. 43, 2010.

Cited by

  1. Eye on Patient Care: Continuous Health Monitoring: Design and Implementation of a Wireless Platform for Healthcare Applications vol.18, pp.2, 2017,