Abstract: Two data signals are subjected to a binary differential phase modulation and transmitted as POLMUX multiplex signals. The types of modulation are selected in such a way that they are orthogonal in relation to each other and do not influence each other during the demodulation of the signals. There is thus no need to regulate the polarization on the receiving side.

Abstract: In a method for communicating by radio, a frequency band divided up into a plurality of subcarriers is used for the communication. Messages are sent from a base station to a user station and/or from the user station to the base station. Messages are processed at some times using a first FDMA method such as for example OFDMA and at other times using a second FDMA method such as for example IFDMA. A transmitter and a receiver implement the method.

Abstract: In one aspect of the invention, audio and video user data are separated. The audio user data is conducted via a TDM loop, where it is tapped and the video user data is fed to the recipient via the packet network, the separated audio and video user data are then combined again.

Abstract: A process is disclosed for detecting the availability of components of a redundant communication system in which hardware components are available at least in duplicate, the redundant system components taking over the function of the previously active operating system components when one or more hardware components break down. The system components operate together in resource groups and each resource group can run on at least two hardware components. In order to permit system component availability to be detected, one resource group operates actively on precisely one single hardware component and the at least one redundant resource group runs on at least one additional system component in a standby mode, the data in the active resource group being automatically replicated.

Abstract: A method and a device for transmitting packet-oriented data are provided. The packet-oriented data includes information data and idle data. The idle data includes at least one symbol of lower amplitude.

Abstract: The invention relates to a method for transmitting data in a data network using virtual containers, which are combined to form a virtual concatenated group by means of the Link Capacity Adjustment Scheme, LCAS. The virtual concatenated group is sub-divided on the send side into a first virtual concatenated group and a second virtual concatenated group. Data of a first type is inserted on the send side into the first virtual concatenated group and data of the second type is inserted into the second virtual concatenated group. Said data is then transmitted via the data network.

Abstract: The invention relates to a method and a system and devices for session control in a communications network, whereby subscriber-specific data (D) of a subscriber (B) called by a calling subscriber (A) for the purpose of call completion (C) are stored in a list (WL), associated with the subscriber (A) to be called, for administering subscriber-specific data (D) of trustworthy subscribers. The subscriber-specific data (D) concerning the called subscriber (B) are automatically stored in the list (WL).

Abstract: The method for operating a radio communications system, which provides for the routing of data of connections via subscriber stations, which occasionally perform the function of routing nodes, provides that one of the subscriber stations indicates, to a routing unit of the radio communications system, its readiness to take on the function of a routing node.

Abstract: A system and a method permit P2P services in an IP-based communications network and also permit direct IP-traffic between subscribers in a controlled manner solely for specific P2P applications that are predetermined by the system provider. Other aims are to provide options for carrying out a special billing method for subscribers of P2P services and to enable the detection of the termination of a P2P session of a subscriber in order to withdraw the authorization for the corresponding P2P service in the network of the system provider. The aims are achieved by software containing logic P2P service-specific communication channels in the terminals, each terminal communicating with an index server prior to establishing direct logic communication connections to other terminals in the communications system. The index server then carries out a P2P service-specific access check for each terminal in conjunction with the billing and access check control function.

Abstract: Means for preventing a split brain scenario during high availability requests by providing a communication link between a switching control device operating on the application level and the module operating on the protocol level are provided. Quitting of the correct physical address is shifted to the application level via the communication link.

Abstract: The invention relates to a receiver for a quadrature-modulated signal, which can be divided into an inphase signal (I) and a quadrature signal (Q). The inphase signal (I) is fed to first and third equalizers (EZ1, EZ3), and the quadrature signal (Q) is fed to second and fourth equalizers (EZ2, EZ4), wherein the first and second equalizers (EZ1, EZ2) each perform a first equalization of the respective signal. An output of the first equalizer (EZ1) is connected to a second input of the fourth equalizer (EZ4), which, by means of a second equalization of the quadrature signal (Q), transmits an equalized quadrature signal (Q2) as a function of the previously fed equalized inphase signal (II) of the first equalizer (EZ1).

Abstract: There is disclosed a method of centralized scheduling of the access to a common radio channel in multi-hop wireless networks. The requests by the relay nodes (RN(1,1) . . . RN(n,Nn), RNi) of resources for sending uplink flows towards the base station (BS), and/or downlink flows towards relay nodes (RN(1,1) . . . RN(n,Nn), RNi) are computed by a requesting node for all links up to the destination and sent as cumulative requests for all links concerned. In case the traffic for which access to the common channel is demanded relates to different classes of service, each cumulative request includes the concatenation of a plurality of individual cumulative requests each concerning traffic belonging to a different class of service.

Abstract: At least one request between neighboring access nodes in a radio communications system is transmitted after verifying a class of the at least one request being transmitted between the neighboring access nodes, where the class assigned by an access node indicates a priority of the request. Based upon the verified class, the transmission of the request is controlled.

Abstract: A single sideband signal is generated from an input optical signal. An optical phase modulator performs optical phase modulation on the input optical signal in accordance with a control signal to produce the single sideband signal. A converter converts the input optical signal into a corresponding electrical signal. A control signal generator generates the control signal in response to an optical signal pulse shape of the input optical signal.

Abstract: The polarization-multiplexed signal contains two data signals that are orthogonally polarized in relation to one another. Their carrier signals are derived from the same source and thus have the same wavelength. The phase difference between the carrier signals, is adjusted or regulated in such a way that it corresponds to 90°. The phase difference of the carrier signals permits the susceptibility to polarization mode dispersion to be significantly reduced.

Abstract: In a method for key handling in mobile communication systems, first and second numbers are exchanged between entities of the mobile communication system. The first and second numbers are respectively used only once with respect to the respective system parameters of the communication system and therefore allowing greater security in the communication system.

Abstract: A process of using a cache of outgoing packet identifiers to recover from a protocol error includes assigning a receive identifier associated with a user entity to a traffic stream at a receive node. The receive identifier is sent to a transmit node. The transmit node is instructed to associate the receive identifier with a receive plurality of data packets of the traffic stream. The transmit identifier associated with the user entity is assigned to the traffic stream at the transmit node. The transmit node identifier, the receive node identifier, and the address of the receive node are stored in a transmit cache at the transmit node for each of the receive plurality of data packets. The receive plurality of data packets is sent from the transmit node to the receive node. An error message is received at the transmit node from the receive node, indicating that the receive identifier was not recognized.

Abstract: In one aspect, a method for estimating the bandwidth requirements for a transmission between an input node and an output node of a network with access controls is provided. According to the method, with respect to a time period, the sum of the value of the average bandwidth of the traffic that has been transmitted between the nodes during the time period and the weighted value of the accumulated bandwidth of the declined reservation requests is calculated. An efficient, approximate determination of the traffic matrix of the network and thus an optimal new definition of the limits for the access controls is permitted. This provides particular advantages in terms of efficiency and resources for applications in networks with a dynamic adaptation of the access controls to modified traffic situations.

Abstract: In a method and/or an OFDM device for SC-FDMA data transmission, a sequence of input data is transformed by means of a discrete transformation as transformed data signals of coded and modulated data signals on first frequency channels into a first frequency space over a first number of frequencies. The transformed data signals are mapped on second frequency channels in a second frequency space with a larger second number of frequencies. The transformed data signals on the second frequency channels are inverse-transformed using an inverse transformation. Data inversely transformed in such a way are provided for transmission. The transformed data signals are mapped into a frequency range of the second frequency channels in such a way that a constant component of the transformed data signals is mapped centrally within the frequency range.

Abstract: Telecommunications terminal having a memory device to store user-specific data, having a transmission device whose input is connected to a memory device, where the memory device and the transmission device are designed to store at least one string of digits and to transmit it while a connection exists, and an authentication device to protect the user-specific data against unauthorized access are provided.