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

Personalising a sim by means of a unique personalised master sim

Abstract: Method for starting up and personalising a further second non-personalised identification module (VSIM), in particular for operation of a mobile radio terminal, wherein a first identification module MasterSIM (MSIM) containing a personalised user data set is present, characterised in that an authentication and/or checking of the second identification module (VSIM) is carried out and the user data set for storage on the second identification module (VSIM) for personalising the second identification module (VSIM) is read from the MasterSIM (MSIM), transmitted to the second identification module (VSIM) and stored therein, in particular containing one or more unique definitive user identification (IMSI).

Experimental comparison of 40 Gbit/s RZ and NRZ transmission over standard singlemode fibre

Abstract: 40 Gbit/s transmission experiments on standard fibre (16 ps/km/nm) and with > 100 km amplifier spacing demonstrate that transmission lengths of 432 km for RZ and 218 km for NRZ modulation schemes are possible, under comparable experimental conditions and in agreement with theoretical studies.

On using a SDN-based control plane in 5G mobile networks

Abstract: Today’s mobile operators face significant challenges with handling the ever-increasing volume of mobile data traffic. With new mobile communication standards, like 4G/LTE, the mobile backhaul architecture has a clear split of a packet-only dataplane and a management plane. Although this new backhaul architecture yields to easier management, we find that this architecture can be improved further by applying the principles of Softwaredefined Networking (SDN). SDN allows for better evolvability of the dataplane without depending on a slew of management or control protocols, allows for centralized control of the overall infrastructure, and allows for a richer feature set based on its programmable nature. This paper investigates the redesign, and illustrates its potential with mobility management as an example.

Method for generating a random number on a quantum-mechanical basis and random number generator

Abstract: The invention relates to a method for generating a random number on a quantum-mechanics basis and a random generator used notably for carrying out said method. The invention is based on the fundamentally random choice of path of a quantum particle on a beam splitter (8, 18), detectors (D1, D1', D2, D2') for capturing the particles being assigned to the outputs (11, 12, 16, 17) of the beam splitter (8, 18). The detectors or their counting events represent different number values of the random sequence. According to the invention, the generation of a multi-particle state in the output channel (11, 12, 16, 17) of the beam splitter (8, 18), and thus of several particles which impact on the detector (D1, D1', D2, D2'), significantly and advantageously increases the response probability of the detector and thus the probability of obtaining a useable counting event for every multi-particle state generated by the source (3, 3'). In this way a random sequence can be obtained more rapidly and more reliably than with single-particle detection.

Distortion reduction in cascaded slow light delays

Abstract: A technique for the distortion reduction of delayed pulses in single and cascaded slow light delay lines is demonstrated. The method is based on the overlap of different independent Brillouin gains. With three Brillouin lines a distortion reduction of around 30% in a two-segment delay line was achieved.