Siemens Aktiengesellschaft

Peter Spennemann

Holger Kunze

Franz Schreib

Dieter Emmer

Heiko Junker

Zoran Gardijan

Gerhard Steib

J&ouml;rg Dauerer

J&ouml;rg Sokat

Bernard Michels

Henning Mai

Ralf Foissner

A base station for a radio communications systems contains at least one carrier-related transceiver device and at least one central unit for controlling the base station. The transceiver device and the central unit each contain at least one interface device which are connected by at least one individual line in accordance with a point-to-point connection for transmitting traffic data. Therefore, point-to-point connections with individual lines for each transceiver device that do not need to satisfy the requirements of identical lengths are used instead of a bus structure. In this way, an essentially more cost-effective implementation of the transmission of traffic data between the central unit and transceiver device is possible because the data rate can also be increased in accordance with the length of the individual line. A logic bus structure is mapped onto physical point-to-point connections. Traffic data, o&m data and also synchronization data are transmitted using the bus structure. The base station is suitable for use in radio communications systems with GSM, TDMA, CDMA radio interfaces, or other radio interfaces.

Base station for a radio communications system

Frame-oriented serial data, such as PCM data, are switched. Switching information is generated with the aid of a switching algorithm. The switching information is referred bit by bit to the data and it includes addresses of output lines of an interface of the apparatus. Because of the bit by bit switching, data from channels with a largely arbitrary bandwidth can be switched without passing multiple times through the switching apparatus. A bypass data path renders it readily possible to switch the last bit of an arriving PCM frame to the first bit of the next PCM frame. Thus each arbitrary bit of an input frame can be switched with a fixed delay of one PCM frame. The apparatus is advantageously embodied as an applications-specific circuit.

Method and apparatus for switching frame-oriented serial data

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Oberhaching, Germany

Peter Spennemann