Why are so many lines still reserved for emergency telephone calls in emergency situations?

Kazuki Tanabe, Sumiko Miyata, Ken Ichi Baba, Katsunori Yamaoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We propose a threshold relaxation and holding time limitation for general telephone calls under trunk reservation control in emergency situations. This TR-HTL method aims to accept more general calls while required emergency calls are still accepted. Computer simulation with a queueing system model of a telephone exchange showed that the threshold relaxation increased the number of accepted general calls while still enabling the required number of emergency calls to be accepted. Comparison between two strategies to set the holding time limit of general calls showed that the value of the limit and the call-blocking rate are in a strong trade-off relationship when the limit is short. An investigation of the relationships between the threshold relaxation rate and the call-blocking rate showed that reserving just 5% of the estimated traffic intensity of emergency calls enabled the required number of emergency calls to be accepted, increasing the number of accepted general calls. Moreover, we showed that much fewer reserved lines are needed for guaranteeing emergency calls.

Original languageEnglish
Title of host publication2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479965151
DOIs
Publication statusPublished - 2014 Nov 14
Externally publishedYes
Event16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014 - Funchal, Portugal
Duration: 2014 Sep 172014 Sep 19

Other

Other16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014
CountryPortugal
CityFunchal
Period14/9/1714/9/19

Fingerprint

Telephone exchanges
Telephone lines
Telephone
Computer simulation
Emergency

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Strategy and Management

Cite this

Tanabe, K., Miyata, S., Baba, K. I., & Yamaoka, K. (2014). Why are so many lines still reserved for emergency telephone calls in emergency situations? In 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014 [6959249] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NETWKS.2014.6959249

Why are so many lines still reserved for emergency telephone calls in emergency situations? / Tanabe, Kazuki; Miyata, Sumiko; Baba, Ken Ichi; Yamaoka, Katsunori.

2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014. Institute of Electrical and Electronics Engineers Inc., 2014. 6959249.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tanabe, K, Miyata, S, Baba, KI & Yamaoka, K 2014, Why are so many lines still reserved for emergency telephone calls in emergency situations? in 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014., 6959249, Institute of Electrical and Electronics Engineers Inc., 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014, Funchal, Portugal, 14/9/17. https://doi.org/10.1109/NETWKS.2014.6959249
Tanabe K, Miyata S, Baba KI, Yamaoka K. Why are so many lines still reserved for emergency telephone calls in emergency situations? In 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014. Institute of Electrical and Electronics Engineers Inc. 2014. 6959249 https://doi.org/10.1109/NETWKS.2014.6959249
Tanabe, Kazuki ; Miyata, Sumiko ; Baba, Ken Ichi ; Yamaoka, Katsunori. / Why are so many lines still reserved for emergency telephone calls in emergency situations?. 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014. Institute of Electrical and Electronics Engineers Inc., 2014.
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