Siemens Aktiengesellschaft

Johannes Schlee

Paul Walter Baier

Stefan Bahrenburg

Tobias Weber

J&uuml;rgen Mayer

Jurgen Mayer

Dieter Emmer

Christoph Euscher

Jürgen Mayer

Thomas Weber

Chritoph Euscher

In the novel method for data transmission via a radio interface in a radio communications system, at least two data channels are assigned to one connection. Each data channel can be distinguished by an individual spread code. In addition to data symbols, midambles with known symbols are transmitted in a data channel. The number of midambles being used for the connection is less than the number of data channels. The method is particularly suitable for use in TD/CDMA 3generation mobile radio networks.

Method and radio station for data transmission

In order to compatibly adapt a wireless telecommunication system with a CDMA, FDMA and TDMA multiple access component, particularly a hybrid &ldquo;JD-CDMA&rdquo; telecommunication system with respect to multiple access methods, to a GSM-specific/DECT-specific (micro-cell, macro-cell and/or Pico cell-specific) telecommunication system with respect to the air interface, signaling information fashioned as &ldquo;stealing flag&rdquo; for distinguishing between payload and signaling channels are first arranged such in a provided time slot structure that an asymmetrical division of the time slot data arises with respect to a training data block (midamble) of the time slot structure and, second, the transmission time duration for the provided time slot structure of a data element fashioned as &ldquo;chip&rdquo; and contained in the time slot structure is dimensioned such that this is a multiple of a predetermined clock frequency&mdash;for example, GSM/DECT-specific clock frequency&mdash;covering the numerical range from 5 through 7.

Wireless telecommunications system with a CDMA, FDMA and TDMA multiple access component, especially a &ldquo;JD-CDMA&rdquo; telecommunications system with hybrid multiple access techniques

In a method and arrangement for channel allocation in a radio communication system that uses a TD/CDMA subscriber separation method, an allocation of at least one channel is signalled to a radio station by an information element in a signalling message. At least one time slot is thereby selected by a time slot selection sub-information element. Subsequently, at least one CDMA code is selected for each selected time slot with a code selection sub-information element, whereby a number of code selection sub-information elements corresponds to a number of selected time slots.

Method and device for allocating channels in a CDMA radiocommunications system

An electronically phase-controlled group antenna is calibrated in radio communications systems, using a reference point shared by all the reference signals. In the downlink, reference signals which can be distinguished from one another are simultaneously transmitted by individual antenna elements of the group antenna and are suitably separated after reception at the shared reference point.

Method for calibrating an electronically phase-controlled group antenna in radio communications systems

In a method for data transmission in a radio communications system, a radio interface is subdivided into time slots for a transmission of bursts. In this case, the data are transmitted in data channels in a time slot, in which data channels can be distinguished by use of individual spread codes. A finite burst containing data symbols and at least one midamble with known symbols is used for data transmission in a data channel. At least one parameter is determined for the traffic conditions of the radio interface, and a ratio of a length of the midamble and a data part with data symbols is adjusted depending on the traffic conditions. The method is suitable in particular for use in 3 generation TD/CDMA mobile radio networks.

Data is transmitted via a radio interface in a radio communications system in that at least one subscriber signal is transmitted, which has an individual fine structure applied to it and, in addition to data symbols in data sections, contains a midamble with known symbols. The fine structures of the data sections and of the midamble differ. At the transmission end, a sum signal is produced which contains signal sections to which different fine structures are applied. The sum signal is filtered in at least one transmission filter and is transmitted via a transmission channel to a receiving radio station. A control device controls the addition so that different attenuation of the signal sections is compensated for by the filtering. The method is suitable, in particular, for mobile stations having a single or variable data rate, and for base stations for use in 3rd generation TD/CDMA mobile radio networks.

Growing community of inventors

Blaustein, Germany

Johannes Schlee