Abstract: During the output of data and distribution services, user data streams frequently transferred to a corresponding communication device (i.e. information output system and/or the distribution system) are possibly irrelevant to the server. Despite this, resources for the processing of incoming useful data flows inside the communication device are provided in many cases on account of compatibility grounds. As a result, energy is reduced in the communication device. According to the invention, in order to reduce the efforts involved in processing useful data transferred in the direction of the communication device, at least one part of useful data is discarded prior to the implementation of working steps provided for the processing of useful data.

Abstract: A method for improving distributed resource allocation in OFDMA based wireless communication networks such as WiMAX IEEE 802.16 for either fixed or mobile subscriber stations SSs is executed by neighbor Base Stations BSs serving the SSs. Each BS controls the allocation of respective permutation zones and radio resources encompassing different radio subchannels within each permutation zone. In this task the BS avails of RRM primitives and instances of a NCMS functionality promoting direct BS-to-BS communication, which can be exploited in a distributed RRM profile. A BS playing the role of RRC sends to Neighbor BSs a unique RRM Request for receiving event-driven Spare Capacity Reports. Among driving events, “Change of Radio Resources Allocation” is included. Neighbor BSs, at every allocation change is detected, send to the requester BS a Spare Capacity Report including a Bitmap indicating subchannels used for transmission in each Permutation Zone.

Abstract: The invention relates to an optical regenerator for a differential phase modulated data signal which comprises, in addition to a unit for bit-by-bit gauge leveling, a unit for the regeneration of the phase of individual symbols of the differential phase modulated data signal. After the bit-by-bit gauge leveling, the data signal that is preset in amplitude is divided into a first and a second data signal. Phase errors of individual signals are detected for the first data signal in a phase error detection unit, are transformed into a correction signal, and are conveyed to a phase error correction unit. The second data signal is corrected in the phase error correction unit, depending on the correction signal conveyed thereto in the phase of said data signal, in such a way that a differential phase modulated data signal, regenerated in amplitude and in phase, is delivered at the output of the correction unit.

Abstract: In a radio communication system, a common channel is provided which is allocated to a plurality of subscribers at the same time for data transmission between a base station and a subscriber station. Measurements regarding the transmission quality are carried out on the common channel and their results are available in the base station. If the transmission quality does not meet a defined criterion, the base station transmits a first message to a controlling radio network controller associated therewith, the first message containing information about the transmission quality and about subscriber stations for which a bad transmission quality was measured. The controlling radio network controller sends a second message which informs serving radio network controllers, associated with the subscriber stations having bad transmission quality and responsible for the configuration of the subscriber stations, about the bad transmission quality.

Abstract: Optoelectrical conversion of the received optical service signal (OSS), bandpass filtering and subsequent squaring produce a spectral line at the clock frequency (fT). This clock line (TL) is selected by means of narrowband filtering and rectified. The service signal voltage (VTLM) obtained in this manner is used to switch on a Raman pump laser (11).

Abstract: A set of permissible parameter pairs with the parameters being a number of code channels and an associated spreading factor is determined according to at least one first selection criterion. Then a parameter pair from the set of permissible parameter pairs for the CDMA transmission is selected according to at least one second selection criterion. In this selection process, the spreading factor is used as a second selection criterion with a higher value being preferred over a lower value if both spreading factors are below or equal to a threshold spreading factor value. This accounts for the fact that in a certain regime low spreading factor involve a prohibitively high processing load and lead to increase inter symbol interference.

Abstract: An optical noise signal is added to an optical data signal on the receiver side, and a signal quality of the data signal is determined. The magnitude of the added noise signal is varied, and a function of the signal quality of the data signal is determined in dependence on the added noise signal. Subsequently, a first straight line is approximated to the previously determined function for smaller values of the added noise signal, and a second straight line for larger values of the added noise signal. The optical signal-to-noise ratio is read from the intersecting point of the first straight line with the second straight line. Thus, the ASE present is derived from the controlled addition of additional ASEs, and the optical signal-to-noise ratio is determined. The process is particularly suited for DWDM systems because it works even with very narrow channel separations, or with narrowband optical filtration along the separation.

Abstract: The invention relates to a method for storing and passing on multimedia messages for a multimedia call in a packet-switching telecommunication network (TN), with the called subscriber (B subscriber) having network access with a known and predetermined bandwidth to the telecommunication network (TN). In the situation where it is found (1) during the setting up of a multimedia call that the available bandwidth is too narrow (2, 3) because the called subscriber (B subscriber) is currently using a further multimedia service, the multimedia call is diverted (4) to a recording device (ABZ) which is available in the telecommunication network (TN). A calling subscriber (A subscriber) can then leave a multimedia message on the recording device (ABZ), which is then passed (5) to a local recording device (ABL) for the called subscriber (B subscriber) via the network access and using the bandwidth that is still available.

Abstract: The invention relates to methods for encoding and decoding media data (MD, CMD). One of the methods comprises the following steps: A request is transmitted by a subscriber terminal (1) over a control network (2) to a control server (3) to establish a set of encoding parameters (K) for control data. The request includes identification data (ID) of the subscriber terminal (1). The control server (3) thereupon specifies the set of encoding parameters (K) for control data, comprising a random number (R), a control data key (CK) and an integrity key (IK), wherein the control data key (CK) and the integrity key (IK) are dependent on the random number (R) and the identification data (ID). A media key (MK) dependent on the control data key (CK) and on the integrity key (IK) is then generated by the control server (3) and transmitted over a core network (4) to a media server (5). The media key (MK) is used to encode and decode the media data (MD, CMD) subsequently transmitted over a media network (6).

Abstract: The invention is related to a method for resilient multi-path connections between edge devices of a communication network. First are determined connection-specific traffic distribution functions for the multi-paths depending on a plausible failure pattern of active and inactive paths of the multi-path of this connection. Further is selected the traffic distribution function for a multi-path depending on the current failure pattern of active and an inactive paths of the multi-path of this connection and is distributed the traffic of the connection onto the path of the corresponding multi-path pursuant to the selected traffic distribution function. An essential advantage of the invention is a significant decrease of network capacity for resilient multi-path connections. Another advantage of the invention is the short reaction time in case of an outage of one or more paths of the multi-path connections.

Abstract: The invention describes a method for transmission of a DHCP message between a telecommunication network, especially a telecommunication network according to the WiMAX-standard, and an Internet Protocol (IP) subscriber (SS/MS; MN) to the telecommunication network. Therein, an information secured with an encryption key is added to the DHCP message. The encryption key is derived from a basic key being provided by a network component of the telecommunication network.

Abstract: In a method for estimating the position of a subscriber station of a radio communication system, a receiver station receives reports from the subscriber station, said reports containing information relating to the signal strength of a receiving signal of at least one transmitting station in the locality of the subscriber station. The reports are stored in a memory of a network device of the radio communication system and a position determining unit takes into account at least two reports stored prior to the request for position estimation, in order to estimate the position of the subscriber station.

Abstract: A wireless user device, in radio communication with a first access point of one or more networks with which it could communicate via at least one of a plurality of access points, sends a network selection request to the first access point. If the network wishes to initiate a response from another access point in the same or another network, the first access point forwards the network selection request to one or more neighboring access points, in the same or another network. If any of the neighboring access points is able to communicate with the user device, that neighboring access point sends a response directly to the wireless user device and the wireless user device chooses the most suitable network from the responses sent.

Abstract: A virtual network controller is described. The controller receives a request for the provision of a slice of a network to a virtual network operator. The controller determines whether the slice can be provided from existing resources, whether the slice can be provided if the existing resources are re-configured, or whether the slice can only be provided if additional resources are obtained. The controller then automatically takes the action required in order to provide the requested slice. The controller can also be used to release resources that are no longer required. Additionally, the controller can be used to re-optimize the network on request.

Abstract: By providing an indicator outside a message element the content of the message element is indicated. This is particularly applicable to indication of a dual transfer mode handover command.

Abstract: In a case where an access point lies outside the direct radio transmission range of a first radio station of a radio communications system, and a routing runs between the first radio station and the access point that includes at least one additional radio station is known to the first radio station and the access point, information can be transmitted from the first radio station to the access point and from the latter to the first radio station via the routing. When the access point receives information relating to an interruption in the known routing from a radio station in the routing, the first radio station downstream of the access point is informed of the interruption in the known routing and subsequently initiates a process for determining a new routing between the first radio station and the access point.

Abstract: A method and apparatus according to the technique wherein support of a quality of service is provided for transmissions between at least one node (N) and at least one mobile station (MS1) in a multihop communication environment. Support is ensured by checking the quality of service class of each transmission prior to transmission. Once the checking has been performed, depending on the class of the checked transmission a multihop transmission or a direct transmission is selected for the transmission to the at least one mobile station, whereby a transmission having a quality of service class belonging to a first class of quality of service classes is transmitted using the direct transmission, whereas a transmission having a quality of service class belonging to a further class of quality of service classes is transmitted using the multihop transmission.

Abstract: The invention relates to a method for localization and location-related connection of a mobile voice-over-IP subscriber to an emergency call station even when the subscriber is temporarily registered in the voice-over-IP network with an address of a location other than his home address (2). For this purpose, the voice-over-IP network comprises an address database which is either configured as a central or decentralized database and in which addresses are indexed with a location-related number. An address of the location of the subscriber is updated (3) by using the address range predefined in the address database and an emergency call is routed (6, 7, 8, 9, 10) to an associated emergency call station using the location-related number. The location-related number and data of the subscriber are then transmitted to the associated emergency call station (8, 9).

Abstract: A method of packet switched handover in a mobile communication system comprising a terminal, a source node and a destination node comprises negotiating protocol parameters for the destination node on behalf of a new network entity, by communicating with an old network entity whilst the terminal is still connected to the source node; and completing the packet switched handover, such that service interruption on handover is reduced.

Abstract: A method synchronizes assemblies in a base station to a reference clock signal. A local clock signal and a frame are formed in a first assembly. The clock signal and the frame are transmitted, using a synchronous transmission with a predictable propagation time, to a second assembly. A reference clock signal is received in the second assembly, and a phase difference and a time difference between the transmitted clock signal on the one hand and the reference clock signal on the other hand are determined. The phase difference and the time difference are transmitted from the second assembly to the first assembly via a link without a predictable propagation time. The phase difference and the time difference are used in the first assembly to determine a manipulated variable which controls the formation of the local clock signal, such that the first and the second assemblies are synchronized in time.