A Performance Study to Ensure Emergency Communications during Large Scale Disasters Using Satellite/Terrestrial Integrated Mobile Communications Systems

Kazunori OKADA; Takayuki SHIMAZU; Akira FUJIKI; Yoshiyuki FUJINO; Amane MIURA

doi:10.1587/transfun.E98.A.1627

A Performance Study to Ensure Emergency Communications during Large Scale Disasters Using Satellite/Terrestrial Integrated Mobile Communications Systems

Kazunori OKADA, Takayuki SHIMAZU, Akira FUJIKI, Yoshiyuki FUJINO, Amane MIURA

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The Satellite/Terrestrial Integrated mobile Communication System (STICS), which allows terrestrial mobile phones to communicate directly through a satellite, has been studied [1]. Satellites are unaffected by the seismic activity that causes terrestrial damage, and therefore, the STICS can be expected to be a measure that ensures emergency call connection. This paper first describes the basic characteristics of call blocking rates of terrestrial mobile phone systems in areas where non-functional base stations are geographically clustered, as investigated through computer simulations that showed an increased call blocking rate as the number of non-functional base stations increased. Further simulations showed that restricting the use of the satellite system for emergency calls only ensures the STICS's capacity to transmit emergency communications; however, these simulations also revealed a weakness in the low channel utilization rate of the satellite system [2]. Therefore, in this paper, we propose increasing the channel utilization rate with a priority channel framework that divides the satellite channels between priority channels for emergency calls and non-priority channels that can be available for emergency or general use. Simulations of this priority channel framework showed that it increased the satellite system's channel utilization rate, while continuing to ensure emergency call connection [3]. These simulations showed that the STICS with a priority channel framework can provide efficient channel utilization and still be expected to provide a valuable secondary measure to ensure emergency communications in areas with clustered non-functional base stations during large-scale disasters.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E98-A No.8 pp.1627-1636

Publication Date: 2015/08/01

Publicized

Online ISSN: 1745-1337

DOI: 10.1587/transfun.E98.A.1627

Type of Manuscript: Special Section PAPER (Special Section on Information and Communication Systems for Safe and Secure Life)

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Authors

Kazunori OKADA
  National Institute of Information and Communications Technology,The University of Electro-Communications
Takayuki SHIMAZU
  National Institute of Information and Communications Technology,The University of Electro-Communications
Akira FUJIKI
  National Institute of Information and Communications Technology,The University of Electro-Communications
Yoshiyuki FUJINO
  Toyo University
Amane MIURA
  National Institute of Information and Communications Technology

Keyword

mobile phone, satellite mobile phone, emergency communications, non-functional base station, priority channels, Satellite/Terrestrial Integrated mobile Communication System

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Kazunori OKADA, Takayuki SHIMAZU, Akira FUJIKI, Yoshiyuki FUJINO, Amane MIURA, "A Performance Study to Ensure Emergency Communications during Large Scale Disasters Using Satellite/Terrestrial Integrated Mobile Communications Systems" in IEICE TRANSACTIONS on Fundamentals, vol. E98-A, no. 8, pp. 1627-1636, August 2015, doi: 10.1587/transfun.E98.A.1627.
Abstract: The Satellite/Terrestrial Integrated mobile Communication System (STICS), which allows terrestrial mobile phones to communicate directly through a satellite, has been studied [1]. Satellites are unaffected by the seismic activity that causes terrestrial damage, and therefore, the STICS can be expected to be a measure that ensures emergency call connection. This paper first describes the basic characteristics of call blocking rates of terrestrial mobile phone systems in areas where non-functional base stations are geographically clustered, as investigated through computer simulations that showed an increased call blocking rate as the number of non-functional base stations increased. Further simulations showed that restricting the use of the satellite system for emergency calls only ensures the STICS's capacity to transmit emergency communications; however, these simulations also revealed a weakness in the low channel utilization rate of the satellite system [2]. Therefore, in this paper, we propose increasing the channel utilization rate with a priority channel framework that divides the satellite channels between priority channels for emergency calls and non-priority channels that can be available for emergency or general use. Simulations of this priority channel framework showed that it increased the satellite system's channel utilization rate, while continuing to ensure emergency call connection [3]. These simulations showed that the STICS with a priority channel framework can provide efficient channel utilization and still be expected to provide a valuable secondary measure to ensure emergency communications in areas with clustered non-functional base stations during large-scale disasters.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E98.A.1627/_p

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@ARTICLE{e98-a_8_1627,
author={Kazunori OKADA, Takayuki SHIMAZU, Akira FUJIKI, Yoshiyuki FUJINO, Amane MIURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Performance Study to Ensure Emergency Communications during Large Scale Disasters Using Satellite/Terrestrial Integrated Mobile Communications Systems},
year={2015},
volume={E98-A},
number={8},
pages={1627-1636},
abstract={The Satellite/Terrestrial Integrated mobile Communication System (STICS), which allows terrestrial mobile phones to communicate directly through a satellite, has been studied [1]. Satellites are unaffected by the seismic activity that causes terrestrial damage, and therefore, the STICS can be expected to be a measure that ensures emergency call connection. This paper first describes the basic characteristics of call blocking rates of terrestrial mobile phone systems in areas where non-functional base stations are geographically clustered, as investigated through computer simulations that showed an increased call blocking rate as the number of non-functional base stations increased. Further simulations showed that restricting the use of the satellite system for emergency calls only ensures the STICS's capacity to transmit emergency communications; however, these simulations also revealed a weakness in the low channel utilization rate of the satellite system [2]. Therefore, in this paper, we propose increasing the channel utilization rate with a priority channel framework that divides the satellite channels between priority channels for emergency calls and non-priority channels that can be available for emergency or general use. Simulations of this priority channel framework showed that it increased the satellite system's channel utilization rate, while continuing to ensure emergency call connection [3]. These simulations showed that the STICS with a priority channel framework can provide efficient channel utilization and still be expected to provide a valuable secondary measure to ensure emergency communications in areas with clustered non-functional base stations during large-scale disasters.},
keywords={},
doi={10.1587/transfun.E98.A.1627},
ISSN={1745-1337},
month={August},}

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TY - JOUR
TI - A Performance Study to Ensure Emergency Communications during Large Scale Disasters Using Satellite/Terrestrial Integrated Mobile Communications Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1627
EP - 1636
AU - Kazunori OKADA
AU - Takayuki SHIMAZU
AU - Akira FUJIKI
AU - Yoshiyuki FUJINO
AU - Amane MIURA
PY - 2015
DO - 10.1587/transfun.E98.A.1627
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E98-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 2015
AB - The Satellite/Terrestrial Integrated mobile Communication System (STICS), which allows terrestrial mobile phones to communicate directly through a satellite, has been studied [1]. Satellites are unaffected by the seismic activity that causes terrestrial damage, and therefore, the STICS can be expected to be a measure that ensures emergency call connection. This paper first describes the basic characteristics of call blocking rates of terrestrial mobile phone systems in areas where non-functional base stations are geographically clustered, as investigated through computer simulations that showed an increased call blocking rate as the number of non-functional base stations increased. Further simulations showed that restricting the use of the satellite system for emergency calls only ensures the STICS's capacity to transmit emergency communications; however, these simulations also revealed a weakness in the low channel utilization rate of the satellite system [2]. Therefore, in this paper, we propose increasing the channel utilization rate with a priority channel framework that divides the satellite channels between priority channels for emergency calls and non-priority channels that can be available for emergency or general use. Simulations of this priority channel framework showed that it increased the satellite system's channel utilization rate, while continuing to ensure emergency call connection [3]. These simulations showed that the STICS with a priority channel framework can provide efficient channel utilization and still be expected to provide a valuable secondary measure to ensure emergency communications in areas with clustered non-functional base stations during large-scale disasters.
ER -