Abstract:
It is proposed an OFDM-demodulator (2000) for operating in a device (BS; UE) of a radio communications network (RCN). A first and second egress sample stream (n 0 ,..., n M-1 , O 0 ,...,o P-1 ) is determined in dependence on a first and second forward Fast Fourier Transform (FFT B1 , FFT B2 ), respectively. It is determined a synchronization sequence (SS) in dependence on the first and second egress sample stream (n 0 ,..., n M-1 , O 0 ,...,o P-1 ).
Abstract:
This application relates to an optical modulation method. The method comprises arranging a first data stream in a plurality of symbol blocks, selecting at least one block modulation scheme from a plurality of block modulation schemes for a symbol block based on a second data stream, generating a plurality of block data symbols for the symbol block based on the first data stream and the selected block modulation scheme,and modulating an optical signal using the generated block data symbols. The application also relates to an optical demodulation method that comprises receiving a plurality of block data symbols arranged in one or more symbol blocks, converting the plurality of block data symbols of symbol blocks and determining at least one applied modulation scheme for each of the symbol blocks. The optical demodulation method also comprises obtaining a second data stream based on the determined modulation schemes applied to the symbol blocks and obtaining a first data stream from the block data symbols of the symbol blocks.
Abstract:
The present document relates to a method for providing control messages to one or more nodes (110a, 110b, 110c) included in an optical transmission network by transmitting containers (200) between the nodes (110a, 110b, 110c), each container (200) comprising a container header (210) and a container payload portion (220), wherein the container header (210) comprises at least information regarding a destination node of the container (200) and wherein the container payload portion (220) includes one or more data portions comprising information associated with one or more client data packets, the method comprising the steps of: - receiving (S610), at a node (110a, 110b, 110c), a container (200) comprising a container payload portion (220) including one or more data portions and a control data portion, the control data portion associated with a control message and a forward error correction (FEC) information in order to protect the control message against transmission errors; - decoding (S620) the control data portion based on the FEC information; - providing (S630) the control message included in the decoded control data portion at said node (110a, 110b, 110c); and - optionally forwarding (S640) the container (200) to a downstream node.
Abstract:
This application relates to a method for compensating optical transmission impairments of at least one fiber link in an optical transmission system, wherein the optical transmission impairments comprising at least chromatic dispersion and fiber nonlinearities cause distortions to at least one signal transmitted through the at least one fiber link. The method comprises: estimating an amount of chromatic dispersion of the at least one fiber link, applying a first filtering step for compensating for an amount of fiber nonlinearities of the at least one fiber link, and applying a second filtering step for compensating for the amount of chromatic dispersion of the at least one fiber link. The first filtering step for compensating for the amount of fiber nonlinearities is applied prior to the second filtering step for compensating for the amount of chromatic dispersion. The step of applying the first filtering step comprises: obtaining power of the at least one signal transmitted through the at least one fiber link, filtering the obtained power of the at least one signal based on the estimated amount of chromatic dispersion of the at least one fiber link, and applying, based on the filtered obtained power of the at least one signal, a phase rotation to the at least one signal for compensating for the amount of fiber nonlinearities. The application further relates to a device for compensating optical transmission impairments.
Abstract:
A method and apparatus for power management in a cellular network for handling multi-carrier operation in case cellular communication services and proximity communication services occur simultaneously is proposed. A Power Headroom Report is sent by a User Equipment. The Power Headroom Report at least contains a power reduction measure reflecting a power reduction if the User Equipment performs proximity service communication.
Abstract:
Systems and methods for contactless speech recognition using lip-reading are provided. In various aspects, a speech recognition unit (112) is configured to receive, via a receiver (108), a Doppler broadened reflected electromagnetic signal that has been modulated and reflected by the lip and facial movements of a speaking subject (104) and to output recognized speech based on an analysis of the received reflected signal. In one embodiment,the functionality of speech recognition unit (112) is implemented via a preprocessing unit (202), a Neural Network ("NNet") unit (204), and a Hidden Markov Model ("HMM") unit (206).
Abstract:
Proposed is a method of monitoring a connectivity of an optical network terminal to an optical output port of a remote node in an optical access network. A network analyzer transmits a control signal that indicates a request for modulating a power level of an optical downstream signal at a dedicated optical output port of a remote node. A controller receives the control signal from the network analyzer and transmits an output control signal indicating the output port to said remote node. The remote node receives the output control signal and activates an optical modulation device present at the output port. An optical network terminal indicates reception levels of a received downstream signal for successive time instances. The network analyzer retrieves reception level data and furthermore derives a potential connection of the optical network terminal to the dedicated output port.
Abstract:
In the context of enhancements for small cells in LTE mobile communication networks, macro and small cell base station transceivers coordinate provision of handover measurement information to mobile devices. This allows to control, rearrange, or shift capacity in a mobile network, for example by changing coverage areas of certain cells, in particular modifying criteria for handover between cells, according for example to load or inter-cell interference. Coordination is required between a macro cell base station and multiple adjacent small cell base stations. The macro cell base station is able to wait for a delay period before announcing information related to handover received from a small cell base station transceiver apparatus to a mobile transceiver. Also, the small cell base station determines and communicates information related to a time setting for the delay period to the macro cell base station, over a backhaul interface such as X2. Multiple small cell base stations provide handover measurement information together, and over-the- air signaling overhead may be saved compared to announcing this information separately when the macro cell base station is able to announce them together, owing to the affordable delay of each of this information sets.
Abstract:
The present document describes a system comprising at least two processing nodes (1) that are connected by a network, and an application distribution function, which automatically distributes processing components (3) of an application to be run on the system over the nodes (1). The system is configured, when a sending processing component and a corresponding receiving processing component are arranged on different nodes, to determine, based on information about the processing component (3) which receive the data, in which representation to send the data via the corresponding communication channel (4).
Abstract:
Embodiments provide apparatuses, methods, and computer programs for a mobile communication system. An apparatus (10) for a network node (100) for a mobile communication system (300), which comprises at least one cell (210) having a coverage area which at least partly surrounds one or more other cells (220), comprises a data module (12) operable to determine information related to a load of the cell (210) or the one or more other cells (220). The network node apparatus (10) further comprises a control module (14) operable to control a state of at least one of the one or more other cells (220) based on the information related to the load, wherein the state corresponds to an active state or an inactive state. An apparatus (20) for a cell (200) for the mobile communication system (300) comprises a load module (22) operable to determine information related to a load of the cell (200) and a communication module (24) operable to provide the information related to the load of the cell (200) to a network node (100).