Using Quality of Service can be Simple: Arequipa with Renegotiable ATM Connections

: We have modi ed the popular Mbone tool Vic (VIdeo Conferencing) to use Arequipa (Application REQuested IPoverATM). The latter enables applications and in particular Vic, to request a direct ATM connection for its exclusive use and to directly control the tra c parameters of this connection. We have also implemented ATM Forum's UNI4.0 signaling and ITU-T's connection modi cation 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 that over the ATM WAN of SWISSCOM, transferring live video from Lausanne to Basel and Zurich over switched, renegotiable ATM connections. To our knowledge, this was the rst time any application had the capacity to tune ATM tra c parameters at run time.

• Type: Journal
• Year: 1998
• Where: CN
• Authors: Werner Almesberger, Leena Chandran-Wadia, Silvia Giordano, Jean-Yves Le Boudec, Rolf Schmid
• Keywords: Application REQuested IPoverATM, Atm Connections, CN 1998, Direct Atm Connection