Siemens Aktiengesellschaft

Michael F&auml;rber

Anja Klein

Meik Kottkamp

Franz Schreib

Thomas Ulrich

Martin Haardt

Erich Kamperschroer

Edgar Bolinth

Gerhard Ritter

Michael Benz

Armin Sitte

Uwe Schwark

Christian L&uuml;ders

J&uuml;rgen Schindler

Norbert L&ouml;chel

Werner Mohr

Michael Wiesen

A radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections is simultaneously transmitted between mobile stations and base stations wherein it is possible to distinguish the information from different connections in accordance with a connection-specific fine structure. Frequency channels are repeatedly provided for time synchronization of the mobile stations in the downward direction in which a signal form is transmitted in addition to information from further connections. The mobile station to be synchronized determines from received signals at least one instant of the arrival of the signal form, which is subsequently used by the mobile station for time synchronization. The system is advantageously applied, for example, in TDD mode for the third mobile communications generation which combines a TDMA and CDMA subscriber separation method.

Method, mobile station and base station for time synchronization of the mobile station in a radio communications system

In order to control the transmitting power provided for point-to-multipoint telecommunications links in a telecommunications system with wireless telecommunication and uncoordinated unlicensed system operation, without significant restriction of the transmitting range, use is made of the fact that the maximum number of mobile stations (MS1 . . . MSn) registered in a base station (BS1) is known. Thus, the base station knows at any time how many and which mobile stations are registered. If all mobile stations are registered (N &equals;N ), the base station can match the transmitting power to the mobile station received as the &ldquo;weakest one&rdquo;. In other cases, if not all mobile stations are registered (N &ne;N ), the base station will alternately transmit with the maximum transmitting. power for a predetermined first period of time and then with the reduced transmitting power, which matches the mobile station received as the &ldquo;weakest one&rdquo;, for a predetermined second period of time.

Method for producing a semiconductor storage device

A mobile station, as well as a method and communication system for adapting same, is provided. The mobile station is located in a radio coverage area of a mobile radiotelephone network and generates an adaptation to a radio interface access method of the mobile radiotelephone network based on signaling information that is transmitted on a pilot channel. The pilot channel is sent by at least one broadcast transmitting station of a public broadcast system in the radio coverage area of the mobile radiotelephone network and received and evaluated by the mobile station.

Mobile station for adaptation to a radio interface access method that is supported by a mobile radio telephone network, and method and communication system for adapting same

Data are transmitted through a radio interface in a GSM mobile radio system. The transmission side performs a continuous phase modulation of the transmission signals for the data to be transmitted. A bandwidth is used which is narrower than that used during a Gaussian minimum shift keying modulation with a modulation bandwidth BT equal to 0.3 so that the radio interface gives right of access on at least one channel with a reduced bandwidth. On the reception side, data detection is carried out without any discrimination between channels with different bandwidths. This enables substantially increased capacity of mobile radiotelephone networks and support for indoor and asymmetrical data transmission applications.

Method and radio station for data transmission

A method is described in which a signaling message is sent from a first radio station to a second radio station. The message contains information relating to both a frequency channel number and a frequency channel bandwidth, each referring to a common standard bandwidth. The signaling message is received by the second radio station, and the signaled frequency channel is used for transmission and reception purposes. The data relating to the frequency channel number and the bandwidth indicate which frequency channel has to be used. In addition the signal includes information about using radio communication systems with a plurality of non-interconnected frequency bands and with bandwidths intended for various applications.

Method and radio communications system for assigning a frequency channel to a radio station and appropriate radio station

A method for allocating radio channels in a radio communications system having timeslots includes the steps of allocating the radio channel for the downlink direction to a mobile station as a function of a channel allocation pattern which indicates the transmission power levels for the timeslots. The mobile station corrects the allocation of the radio channel as a function of an interference pattern which indicates the interference power levels in the timeslots. The allocation process results in the transmission power level being distributed as uniformly as possible between the timeslots which are provided for a connection from the radio station in the downlink direction, wherein the allocation process is a function of the occupancy of the timeslots in accordance with the channel allocation pattern. The ability of correcting the allocated timeslot under the control of the mobile station allows to avoid a disadvantageous soft handover, even with a frequency repetition interval equal to unity which is critical with respect to interference.

Method and radio communications system for allocating a radio channel

A device for assigning radio transmission channels administers the radio transmission channels within a radio zone and optimizes the utilization of the radio transmission channels. The radio transmission channels for communications links from/to a mobile station are assigned to at least one base station. The device for assigning the radio transmission channels includes a signal evaluation device, a memory device, and a control device. The memory device stores matrices with one or more parameters. The assignment of the radio transmission channels advantageously changes dynamically as a function of the variation of the parameters in the matrices. A method for administering and assigning radio transmission channels is also provided.

Device and method for administering and assigning radio transmission channels in mobile radio networks

A transmission, without modification of the transmission frequency, switches over the radiation characteristic for the radio signals corresponding to the time protocol of the message transmission, and the chronologically successive radio signals of a traffic relation are decorrelated to one another. In this way, the signal extinguishing that arises in a receiver due to multipath propagation can be reduced. The transmission apparatus is in particular constructed as a base station in GSM mobile radiotelephone networks.

Growing community of inventors

Wolfratshausen, Germany

Michael Färber

Growing community of inventors

Wolfratshausen, Germany

Michael F&auml;rber

Michael Färber