Using quality of service can be simple: Arequipa with renegotiable ATM connections

• Published in: Computer networks (Amsterdam, Netherlands : 1999) Netherlands : 1999), 1998-12, Vol.30 (24), p.2327-2336
• Main Authors: Almesberger, Werner, Chandran-Wadia, Leena, Giordano, Silvia, Le Boudec, Jean-Yves, Schmid, Rolf
• Format: Article
• Language: English
• Subjects: Access methods and protocols, osi model; Applied sciences; Arequipa; Asynchronous transfer mode; ATM; Exact sciences and technology; Internet Protocol; IP over ATM; Network management systems; QoS; Quality of service; Renegotiation; Signaling; Studies; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Vic; Wide area networks
• ISSN: 0169-7552; 1389-1286; 1872-7069
• DOI: 10.1016/S0169-7552(98)00222-0

We demonstrate how the Quality of Service selection capability of ATM networks can be made available to IP applications in a simple way. To show this, we have modified the popular Mbone tool Vic (VIdeo Conferencing) to use Arequipa (Application REQuested IP over ATM). The latter enables applications and in particular Vic, to request a direct ATM connection for its exclusive use and to directly control the traffic parameters of this connection. We have also implemented ATM Forum's UNI4.0 signaling and ITU-T's connection modification recommendation Q.2963.1, on end-systems as well as on switches. This implementation, coupled with the Arequipa mechanism, allowed Vic to negotiate and renegotiate ATM bandwidth at will, at run time. We describe how Vic accomplished this over the ATM WAN of SWISSCOM, transferring live video from Lausanne to Basel and Zürich over switched, renegotiable ATM connections. To our knowledge, this was the first time any application had the capacity to tune ATM traffic parameters at run time.