TY - GEN
T1 - Why are so many lines still reserved for emergency telephone calls in emergency situations?
AU - Tanabe, Kazuki
AU - Miyata, Sumiko
AU - Baba, Ken Ichi
AU - Yamaoka, Katsunori
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/14
Y1 - 2014/11/14
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84919363718&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919363718&partnerID=8YFLogxK
U2 - 10.1109/NETWKS.2014.6959249
DO - 10.1109/NETWKS.2014.6959249
M3 - Conference contribution
AN - SCOPUS:84919363718
T3 - 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014
BT - 2014 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th International Telecommunications Network Strategy and Planning Symposium, Networks 2014
Y2 - 17 September 2014 through 19 September 2014
ER -