Dynamic call-blocking algorithms for telecommunications networks

Mass-calling events can cause significant congestion in the phone network due to the high volume of redial attempts. This paper presents dynamic algorithms which randomly block some calls at their origination points, thus reducing traffic in the network. The algorithms respond to changing congestion...

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Bibliographic Details
Published in:IEEE transactions on communications 2003-05, Vol.51 (5), p.741-747
Main Author: Shortle, J.F.
Format: Article
Language:English
Subjects:
Algorithms
Blocking
Communication switching
Communication system traffic control
Congestion
Customers
Dynamics
Heuristic
Heuristic algorithms
Information rates
Marketing and sales
Networks
Switches
Telecommunication congestion control
Telecommunication traffic
Telecommunications
Throughput
Traffic control
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Summary:Mass-calling events can cause significant congestion in the phone network due to the high volume of redial attempts. This paper presents dynamic algorithms which randomly block some calls at their origination points, thus reducing traffic in the network. The algorithms respond to changing congestion levels by observing whether or not previous calls have been answered. The algorithms reduce call attempts by 50% during periods of 80% blocking, with little disruption in blocking levels to the dialing customers (blocking increases by less than 1%). We also derive an improved blocking heuristic which is more effective under periods of heavier congestion.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2003.811384