Deutsche Telekom

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 & Signal. The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.

Towards Unified Programmability of Cloud and Carrier Infrastructure

Abstract: The rise of cloud services poses considerable challenges on the control of both cloud and carrier network infrastructures. While traditional telecom network services rely on rather static processes (often involving manual steps), the wide adoption of mobile devices including tablets, smartphones and wearables introduce previously unseen dynamics in the creation, scaling and withdrawal of new services. These phenomena require optimal flexibility in the characterization of services, as well as on the control and orchestration of both carrier and cloud infrastructure. This paper proposes a unified programmability framework addressing: the unification of network and cloud resources, the integrated control and management of cloud and network, the description for programming networked/cloud services, and the provisioning processes of these services. In addition proofs-of-concept are provided based on existing open source control software components.

Pan-European optical networking using wavelength division multiplexing

Abstract: The development of the information society will require the introduction of high-capacity transport networks with high performance and low cost. There are currently two ACTS (Advanced Communications Technologies and Services program launched by the European Commission) projects addressing specifically the problem of trans-European optical transport networks using WDM (wavelength division multiplexing). Important issues addressed are the high capacity transmission on existing fiber infrastructure and the introduction of flexibility in the network through the use of optical cross-connects. If these networks become a reality, they could drastically change the evolution of both telecommunication and computer networking because of their transparency and the abundance of inexpensive bandwidth.

Position assignment in digital cellular mobile radio networks (e.g. GSM) derived from measurements at the protocol interface

Abstract: Measurements are carried out at the protocol interface between base transceiver station and base station controller unit for optimization of the base station subsystem in an existing digital mobile network. At this interface it is possible-in contrast to measurements at the air interface-to gain mass data (e.g. received power, BER, signaling information) with low expenditure. The collected data allow however, only for a very rough estimation of the terminal positions. In this paper a method is presented to assign measurement data from the protocol interface to the related location of the mobile with the aid of field strength prediction. The application of the position assignment method is demonstrated within the GSM network. To validate this approach measurements were taken from the German GSM D1 net and were compared with exact position assignments by means of GPS. On the base of location assignment methods there are new experimental possibilities available, e.g. identification of traffic hot spots or areas of bad interference conditions.

Weight-shifting mobiles: two-dimensional gravitational displays in mobile phones

Abstract: In this paper, we present a novel type of haptic display for usage in mobile phones. It changes the gravitational properties of the device by shifting an internal weight along two axes. Its utility is explored in a performance study, in which users were estimating positions of the device's actuated center of gravity. The users also participated in qualitative studies: A questionnaire that assessed the perceived quality of interacting with the device, and an interview in which they described their experiences with the weight-shifting mobile. Furthermore, this paper suggests three domains of application in which the system may be of benefit: Augmenting digital content with physical mass, ambient displays, and haptically augmented wayfinding.