Packet Satellite technology was an outgrowth of early work in packet switching on multiaccess radio channels carried out at the University of Hawaii with the support of the Defense Advanced Research Projects Agency (DARPA). The primary difference between the earlier packet-switched ARPANET [1, 2] and the ALOHA system developed at the University of Hawaii [3] was the concept of multiple transmit...

Operating networks depends on collecting and analyzing measurement data. Current technologies do not make it easy to do so, typically because they separate data collection (e.g., packet capture or flow monitoring) from analysis, producing either too much data to answer a general question, or too little data to answer a detailed question. In this paper, we present Sonata, a network telemetry sys...

DARPA and the NSF are encouraging research on active router networks. By applying these concepts to telephony we: — create a commodity, other than bandwidth, that a telephone network owner can sell, — create new businesses for both equipment manufacturers and for network providers, — provide local access with a distinct advantage over the current local operating companies, — integrate the telep...

It is a critical issue in network dimensioning that the characterization of traffic at the call level should be accurate enough to provide the designer with reliable tools for dimensioning the transmission and switching capacities. Since in B-ISDN the nature of traffic is expected to be very different from traditional telephone traffic with much more complex features, therefore, new methods are...

The global Internet has emerged to become an integral part of everyday life. Internet is now as fundamental a part of the infrastructure as is the telephone system or the road network. Peer-toPeer (P2P) is the logical antithesis of the Client-Server (CS) paradigm that has been the ostensible predominant paradigm for IP-based networks since their inception. Current research indicates that P2P ap...

Over the recent years enormous changes in the telecommunication services, techniques, regulations and markets have taken place. However, even with many new exciting services the telephony service is still popular. This paper provides empirical traffic data and observations of telephony traffic patterns in mobile and IP telephony. They are presented and compared with old telephony patterns from ...

Weather is known to have a strong effect on traffic volumes. In this paper, we suggest a spatial approach to the modelling of traffic volumes. The relationship between weather variables and traffic volume is first modelled at a global level in a regional city centre in Finland. As strong a spatial dependency is found between the variables in the model, spatial variation is incorporated into the...

Voice over Internet Protocol (VoIP) is a rapidly emerging technology. Currently, the Internet is being wired to support voice and fax traffic. The widespread interest in VoIP is not necessarily the ability of IP to carry voice traffic but the ability to carry voice and fax traffic over data networks. The implications of this are far-reaching. That is, the Internet, for the most part, will event...

In this paper, we describe a telephone dialog system for location-based services. In such systems, the effectiveness with which both the user can input location information to the system and the system delivers location information to the user is critical. We describe strategies for both of these issues in the context of a dialog system for real-time information about traffic, gas prices, and w...