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.

A measurement-based study of handover improvement through range expansion and interference coordination

Abstract: Although the range expansion and inter-cell interference coordination ICIC have been shown to successfully enhance the capacity and load balancing in the Heterogeneous Network, their impacts on the handover HO performance are not fully understood in existing studies. In this paper, a novel measurement-based approach is adopted to investigate these issues, where the real measured data of the reference signal received power in a macro-pico co-channel deployment are collected. Then the mobility performance in terms of the HO failure rate and ping-pong rate is simulated with various ICIC schemes in the same reality environment. This has been made possible by modeling the possible HO failure events based on evaluating the downlink received signal-to-interference-plus-noise ratio from reference signal received power. The simulation results indicate that range expansion together with ICIC can have positive or negative influences on macro-to-pico, pico-to-macro, pico-to-pico and macro-to-macro HOs in the Heterogeneous Network. The existing static ICIC or mobility-based ICIC cannot handle the intra-layer pico-to-pico and macro-to-macro interference, thus limiting their abilities to improve the mobility performance. Motivated by this, a dynamic-ICIC-aided HO procedure is proposed. The proposed HO enhancement method is more flexible and effective in mitigating both the inter-layer and intra-layer interference, outperforming the existing methods significantly. Copyright © 2014 John Wiley & Sons, Ltd.

Authorised user control method for telecommunications device

Abstract: The control method involves using a memory device associated with the telecommunications device (10). This is used for holding a reference identification, obtained via a detector (30) with a biometric sensor (32), for scanning a body part of the authorised user, such as the finger tip. The reference identification is compared with the digital identification information subsequently provided by the detector, for verifying the identity of the user, before the telecommunications device can be used. The detector unit with biometric senors may use infrared heat detection for constructing body part outlines

In car communication system has individual microphones and loudspeakers allows easy conversation

Abstract: The in car communication system has microphones (M1-M4) for each occupant with their input processed (8) depending on location and fed to loudspeakers (L10-L14) and also audiovisual input channels (5,6) under control of the control unit (17)

Bridging the gap between the Kodak and the Flickr generations: A novel interaction technique for collocated photo sharing

Abstract: Passing around stacks of paper photographs while sitting around a table is one of the key social practices defining what is commonly referred to as the 'Kodak Generation'. Due to the way digital photographs are stored and handled, this practice does not translate well to the 'Flickr Generation', where collocated photo sharing often involves the (wireless) transmission of a photo from one mobile device to another. In order to facilitate 'cross-generation' sharing without enforcing either practice, it is desirable to bridge this gap in a way that incorporates familiar aspects of both. In this paper, we discuss a novel interaction technique that addresses some of the constraints introduced by current communication technology, and that enables photo sharing in a way, which resembles the passing of stacks of paper photographs. This technique is based on dynamically generated spatial regions around mobile devices and has been evaluated through two user studies. The results we obtained indicate that our technique is easy to learn and as fast, or faster than, current technology such as transmitting photos between devices using Bluetooth. In addition, we found evidence of different sharing techniques influencing social practice around photo sharing. The use of our technique resulted in a more inclusive and group-oriented behavior in contrast to Bluetooth photo sharing, which resulted in a more fractured setting composed of sub-groups.

Method for using a user equipment with a first public land mobile network and with a second public land mobile network, user equipment, program and computer program product

Abstract: The invention relates to a method for using a user equipment with a first public land mobile network and with a second public land mobile network, wherein the user equipment is a DSDS user equipment (Dual SIM dual standby user equipment), wherein with respect to the first public land mobile network and with respect to an idle mode of the user equipment in the first public land mobile network, a first discontinuous reception scheme is implemented in case that the first public land mobile network is a registered public land mobile network to the user equipment, wherein in the first discontinuous reception scheme of the user equipment, a first paging occasion time interval is defined by means of: -- a first time interval corresponding to a first discontinuous reception cycle length, and -- a first paging time within the first time interval such that, in the first discontinuous reception scheme, the user equipment needs only to monitor a paging channel during the first paging occasion time interval, wherein with respect to the second public land mobile network and with respect to an idle mode of the user equipment in the second public land mobile network, a second discontinuous reception scheme is implemented in case that the second public land mobile network is a registered public land mobile network to the user equipment, wherein in the second discontinuous reception scheme of the user equipment, a second paging occasion time interval is defined by means of: -- a second time interval corresponding to a second discontinuous reception cycle length, and -- a second paging time within the second time interval such that, in the second discontinuous reception scheme, the user equipment needs only to monitor a paging channel during the second paging occasion time interval, wherein the beginning of the first paging occasion time interval and the beginning of the second paging occasion time interval are spaced in time in a predetermined manner by a separation time interval.