The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2007
Filed:
Apr. 16, 2004
Karlheinz Schreyer, Wolfratshausen, DE;
Werner Schropp, München, DE;
Karlheinz Schreyer, Wolfratshausen, DE;
Werner Schropp, München, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a radio alarm signaling system with a central station (Z) and a plurality of bidirectional (BTto BT) and unidirectional (UT, UT) subscribers, the unidirectional subscribers (UT, UT) attempt to send messages via one of the bidirectional subscribers (BTto BT) to the central station. In this case the message sent by a unidirectional subscriber (UT) is received by all bidirectional subscribers (BT, BT, BT) in its radio coverage area. Each bidirectional subscriber that has received this message waits until a time slot individually assigned to it before forwarding the message. During the wait time each of these bidirectional subscribers (BT, BT, BT) monitors the radio channel to see whether another subscriber has already forwarded the message. If this is the case it suppresses its own forwarding. This ensures that only one of the bidirectional subscribers (BT) forwards the message so that no overloading of the radio system occurs.