An Adaptive Local Method for VPC Capacity Management

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Sven-Olof Larsson, Åke Arvidsson
Title: An Adaptive Local Method for VPC Capacity Management
Translated title: En adaptiv lokal metod för VPC kapacitetshantering
Conference name: ITC-16
Year: 1999
Pagination: 561-570
ISBN: 0-444-50268-8
Publisher: Elsevier
City: Edinburgh
ISI number: 000083407400054
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 780 00
Authors e-mail:
Language: English
Abstract: By reserving transmission capacity on a series of links from one node to another within an ATM or SDH/SONET network, making a virtual path connection (VPC) between these nodes, several benefits are obtained. VPCs will simplify routing at transit nodes, connection admission control, and QoS management by traffic segregation. As telecommunication traffic exhibit variations in the number of calls per time unit due to office hours, quick changes in traffic loads (New Year's Eve), and changes in the types of traffic (as in introduction of new services), there is a need to cope for this by adaptive capacity reallocation between different VPCs. We present a type of VPC capacity management policy that uses an allocation function to determine the needed capacity for the coming updating interval based on the current number of active connections. A method for estimating individual VPC congestion states is described together with an adaptive parameter setting of the allocation function.
Subject: Telecommunications\VP and VC Assignment and Routing
Keywords: Virtual paths, Adaptive capacity management
Note: Genom att använda logiska länkar (virtuella vägar) förenklar man vägvalet för datapaketen, förenklar uppkopplingskontroll samt gör det lättare att hantera olika service-klasser av datatrafik. En lokal metod som använder antalet pågående uppkopplingar används. En metod att uppskatta lasten längs den logiska länken används för att justera en faktor som används för uträknandet av hur mycket kapacitet som behöver reserveras. Vid hög last minskas kravet på hur mycket kapacitet som man vill reservera längs hela den logiska länken.