Robert Boschgmbh

Wolfgang Detlefsen

Ulrich Kersken

Vasco Vollmer

Gerd Draeger

Markus Radimirsch

Wilhelm Grabow

Thomas Wixforth

Peter Tondl

Torsten Gerber

Christian Brenzel

Bernd Waldmann

Volker Swarek

The electronic system, especially a security system, includes a number of different units that access a network according to a multiple access protocol, which is designed to minimize collisions between frames while reducing bandwidth requirements. The units may monitor different spatial regions according to several different criteria. Respective units that monitor according to correspondingly different criteria in a given spatial region may be assembled into one group and units that monitor different spatial regions but according to the same criterion may be assembled into another group. Each of the units of the one group are provided access to the network in one concurrent time slot, while the units of the other group are provided access to the network in a different concurrent time slot.

Electronic system with a multiple access protocol and method of multiple access

A vehicle navigational receiver module includes a first planar antenna for receiving navigational radio signals, a signal processing circuit that is connected to the antenna, as well as a ground plane. In addition, a second planar antenna for receiving a telematic radio signal is arranged so as to at least partially overlap the first planar antenna and is connected to a second signal processing circuit.

Combined receiver and transponder module

On-board unit for transponder operation

Growing community of inventors

Hildesheim, Germany

Wolfgang Detlefsen