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Institution

Deutsche Telekom

CompanyWelwyn Garden City, United Kingdom
About: Deutsche Telekom is a company organization based out in Welwyn Garden City, United Kingdom. It is known for research contribution in the topics: Telecommunications network & Terminal (electronics). The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.


Papers
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Patent
16 Jan 2008
TL;DR: In this article, a method for the controlled querying of information stored in a structured format in a data processing system using a dialog system is presented, which includes: providing at least one first ontology configured to store information in structured format.
Abstract: A method for the controlled querying of information stored in a structured format in a data processing system using a dialog system includes: providing at least one first ontology configured to store information in a structured format; and providing at least one input grammar in the dialog system configured to analyze user inputs as a function of the at least one first ontology.

15 citations

Patent
Dietmar Rudolph1
10 Apr 2002
TL;DR: In this article, a method for digital transmission using an AM transmitter includes operating an output stage of the AM transmitter in a linear mode and correcting the supply voltage of the output stage in the linear mode as a function of an instantaneous drive so as to improve efficiency.
Abstract: A method for digital transmission using an AM transmitter includes operating an output stage of the AM transmitter in a linear mode and correcting the supply voltage of the output stage in the linear mode as a function of an instantaneous drive so as to improve efficiency. The correcting is performed by operating the modulator of the AM transmitter as a switched-mode power supply unit so as to deliver a corrected supply voltage to the output stage, and scanning an envelope of a complex modulated data signal so as to control the correcting. A time constant during the scanning of the envelope enables immediate following of a rise in the envelope. The complex modulated data signal is delayed after the scanning so as to perform the correcting during the delay and prevent an overdriving of the output stage.

15 citations

Patent
03 Mar 2011
TL;DR: In this article, a controller determines a micro-flowset routing for the set of flows, the micro flowset routing defining which of a set of directed links connecting a plurality of routing devices are used to route each of the flows from the respective ingress routing device to the respective egress routing device.
Abstract: A method for routing-assisted traffic monitoring includes providing a set of flows, each flow having an associated ingress routing device and an associated egress routing device. A controller determines a micro-flowset routing for the set of flows, the micro-flowset routing defining which of a set of directed links connecting a plurality of routing devices are used to route each of the flows from the respective ingress routing device to the respective egress routing device. The controller transmits flow information to at least a first routing device of the plurality of routing devices according to the micro-flowset routing, the flow information defining which of the set of directed links are to be used to route at least one flow entering the first routing device to a second routing device of the plurality of routing devices.

15 citations

Patent
27 Jan 1995
TL;DR: In this paper, anordnung zur Ermittlung von Nutzungsgebuhren fur Verkehrswege und/oder Verkehrflachen werden mit Hilfe einer in einem Fahrzeug befindlichen Einrichtung aufgrund von Positionsdaten and Tarifdaten Nutzingsgebhren berechnet and uber ein Datenubertragungssystem an eine Zentralstelle ubertragen mit der Moglichkeit
Abstract: Bei einem Verfahren und einer Anordnung zur Ermittlung von Nutzungsgebuhren fur Verkehrswege und/oder Verkehrsflachen werden mit Hilfe einer in einem Fahrzeug befindlichen Einrichtung aufgrund von Positionsdaten und Tarifdaten Nutzungsgebuhren berechnet und uber ein Datenubertragungssystem an eine Zentralstelle ubertragen mit der Moglichkeit einer Uberprufung der ordnungsgemasen Zahlung .

15 citations

Proceedings ArticleDOI
18 Mar 2008
TL;DR: A testbed specially built to investigate the user perception of mobility in NGNs, using the Mobisense setting, which allows the migration of VoIP calls across heterogeneous wireless networks, and simulation of user mobility patterns while roaming between networks.
Abstract: The convergence of different commercial wireless technologies poses new opportunities for always-on connectivity and nearly ubiquitous access in Next Generation Networks (NGNs) The proposed integrated virtual access platform frees users from the fixed locations, and allows them to enjoy services while they are on the move However, the possibility to seamlessly roam (on demand) across wireless technologies is a must in NGNs Even though a wide body of research has been done on seamless mobility, a thorough analysis of user perception of this phenomenon is required in order to successfully design, and further improve, always-on services and mobility management solutions This paper describes a testbed specially built to investigate the user perception of mobility in NGNs The Mobisense testbed enables the mapping of user experience to network conditions, focusing on phenomena caused by a user roaming across diverse wireless technologies and the impact on applications and services The Mobisense setting helps in the analysis of IP services, in particular experiments were done to study user perceived quality of Voice over IP in NGNs This testbed allows (1) the migration of VoIP calls across heterogeneous wireless networks, (2) network application data tracking, (3) simulation of user mobility patterns, (4) and audio codec changeovers while roaming between networks

15 citations


Authors

Showing all 3475 results

NameH-indexPapersCitations
Jörg Müller6740715282
Anja Feldmann6734017422
Yuval Elovici6254414451
Lior Rokach5535719989
Pan Hui5246817724
Hartmut G. Roskos504349643
Wolfgang Haase5062411634
Shlomi Dolev4851610435
Jean-Pierre Seifert452987516
Stefan Schmid455619088
Fabian Schneider441647437
Karsten Buse433947774
Tansu Alpcan432937840
Florian Metze423187148
Christian Bauckhage422858313
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20227
202139
202061
201984
201897