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.

Softwarization and Network Coding in the Mobile Edge Cloud for the Tactile Internet

Abstract: Future communication systems, such as those enabling the Tactile Internet, will face disruptive changes compared to the state-of-the-art systems, which are 1) highly dynamic topology changes; 2) replacement of the end-to-end paradigm by real mesh topologies; and 3) a massive number of devices. To overcome these disruptive changes, future communication systems will substitute specialized hardware with generic hardware boxes and the softwarization paradigm. Furthermore, this approach will allow for a quick deployment of new services, which was known to the cloud service already. In this paper, we will introduce the most prominent candidates for softwarization such as software-defined networking (SDN) and network function virtualization (NFV) and explain the importance of these technologies for the upcoming 5G communication system and Tactile Internet applications realizing novel mobile edge computing, storage, and networking solutions. Specifically, we will discuss use cases of SDN/NFV such as network coding as a service, and ultrareliable distributed edge caching. Finally, we will describe our holistic testbed at the 5G Lab Germany as a fundamental step toward creating an experiment infrastructure that anticipates the 5G communication systems and Tactile Internet applications.

Route usage evaluation

Abstract: The invention relates to vehicle on-board equipment implementing at least one route usage evaluation scheme. The on-board equipment can process vehicle position data and map data in order to provide route usage data on-board. Alternatively, the vehicle position data may be transferred to a back-end system where it is processed to provide route usage data. The invention also relates to corresponding back-end systems and methods.

Photonic crystals built by three-dimensional additive lithography enable integrated optics of high density

Abstract: Photonic crystals were investigated experimentally in a scaled setup with microwaves in the form of 2D arrays of dielectric rods of high permittivity surrounded by air and are reported in the literature. These crystals render perfect mirrors for a band of wavelengths. Having an impurity built into the structure, transmission filters with a specific narrow bandwidth can be generated. The predominant feature of these structures is, that devices of high finesses are obtained with as few as 6 planes of dielectric rods. The grid constant of the rods is 80 nm diameter and micrometers dimensions with a surface roughness below 3 nm. It offers the freedom to taylor the refractive index of the material by selecting precursor materials, deposition conditions, and exposure mode. A scanning electron microscope with VIDAS-beam control system is used for this lithography. A custom designed lithography function allows to control position, dwelltime, and sequence of the pixels. Using a program generated database, which contains all pixel and time information required, 3D structures are generated with the deposition process. The devices are placed with nm precision in waveguide patterns. Macro-controlled construction of arrays of dielectric rods of high aspect ratios is presented, which resemble perfect or imperfect photonic crystals. Using specialized crystals, filters and tunable filters dense devices for routing of light or optical metrology can be fabricated.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

HiL system and method for testing ECU (electronic control unit) of a car control system

Abstract: The system has a simulation device for execution of a system simulation, where the device is operated by a central unit (3) and is arranged on the central unit and on module units (2a-2c) of test modules (4a-4c) in a shared manner. The part of the device placed in the central unit simulates an interaction of controllers (1a-1c), where the interaction is related to a controller overlapping sequence. The other part of the device placed in the module units simulates controller specific sequence for the connected controllers. Independent claims are also included for the following: (1) a method of operating a hardware-in-the-loop system (2) a computer program product for a hardware-in-the-loop system (3) a data carrier with a computer program product.

Comprehensive topology and traffic model of a nationwide telecommunication network

Abstract: As a basis for meaningful simulation and optimization efforts with regard to traffic engineering or energy consumption in telecommunication networks, suitable models are indispensable. This concerns not only realistic network topologies but also models for the geographical distribution and the temporal dynamics of traffic, as well as the assumptions on network components and technology. This paper derives such a model from the practice of a large national carrier. Applying the network and traffic model, we demonstrate its use by presenting various optimization cases related to energy-efficient telecommunication. Here, we focus on load adaptivity by employing sleep modes to the network hardware, where several constraints on the reconfigurability of the network over time are considered.