Telemetry networks often operate in challenged wireless environments, resulting in periods of disconnection. Our delay tolerant networking (DTN) gateway dynamically detects disruptions in connectivity and buffers telemetry data until connectivity is reestablished. When the connection is resumed, all buffered data is transmitted automatically in order to backfill any gaps in the telemetry stream...

We examine the possible existence of a ‘gateway’ effect between the consumption of three different substances – cigarettes, alcohol, and marijuana – among adolescents. A gateway effect exists when consumption of one substance increases the likelihood of subsequent initiation of consumption of other substances. We find evidence that smoking and/or alcohol consumption serve as ‘gateways’ for init...

In wide-area and heterogeneous environments, it is necessary to deploy media gateways at strategic locations within the networks, in order to deliver customized and compose-able multimedia services to individual users. In many cases, media gateways have to be dynamically discovered, because (1) a host may not know a priori all the media gateways it will possibly use, and (2) the change of host ...

The Internet supports a vast and growing community of computers users around the world. Unfortunately, this network can provide anonymous access to this community by the unscrupulous, careless, or dangerous. On any given Internet there is a certain percentage of poorly-maintained systems. AT&T has a large internal Internet that we wish to protect from outside attacks, while providing useful ser...

With the advent of the smart energy grid – an energy transportation and distribution network being combined with an IT network for its monitoring and control – information security has gained tremendous importance for energy distribution and energy automation systems. Integrated security functionality is crucial to ensure a reliable and continuous operation of the smart energy grid. Further sec...

The key design idea underlying the Wireless Application Protocol (WAP) is to use a gateway at the intersection of the wireless mobile network and the traditional, wired network. The WAP gateway forwards web content to the mobile phone in a way intended to accommodate the limited bandwidth of the mobile network and the mobile phone’s limited processing capability. However, the gateway introduces...

AQM (Active Queue Management) mechanisms support the end-to-end congestion control mechanism of TCP (Transmission Control Protocol). Several AQM mechanisms have been recently proposed and studied by many researchers. One of popular AQM mechanisms is the RED (Random Early Detection) gateway, which randomly discards arriving packets. Although its steady state performance has been fully investigat...

Small and medium sized businesses often operate local area networks that connect via service providers to the Internet. If multiple connections are required, there are two options available: A gateway router that operates the border gateway protocol or a simpler gateway appliance that mostly uses load balancing and often network address translation. However, there is no simple way to multi-home...

With computing facilities often distributed over sites that are both physically and administratively separate, many organizations find themselves with several unconnected Local Area Networks (LANs). Eventually it becomes desirable to enhance communication capabilities between these LANs so that users can access all hosts on all LANs. This paper describes a terminal gateway, a system that provid...

A simple adaptive MAC scheduling algorithm, called Gateway Oriented Scatternet Scheduling (GOSS), is proposed for data exchange in a Bluetooth scatternet. Unlike the existing scheme MDRP (Maximum Distance Rendezvous Point) that has a global superframe schedule shared by all gateways, the schedule used by each gateway is individually determined. Equal partition of the superframe schedule at a ga...