Wireless communications system with detection of foreign radiation sources

US7024188B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Jamshid Khun-Jush · Nuremberg, DE
• Peter Schramm · Erlangen, DE
• Jan Lindskog · Mölnlycke, SE
• Stefan Rommer · Mölndal, SE
• Mathias Pauli · Koblenzer Straße, DE
• Gerd Zimmermann · Eckental, DE
• Fredrik Johansson · Lund, SE
• Anders Ranheim · Handen, SE
• Peter Larsson · Solna, SE

Key dates

• Filing date: Sep 13, 2002
• Grant date: Apr 4, 2006
• Expiry date: Nov 25, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W84/18
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.