Method of assigning precoding vectors in a mobile cellular network

US9438324B2 · kind B2 · utility

Assignee

• Alcatel Lucent · FR

Inventors

• Michael Ohm · Stuttgart, DE
• Lutz Schoenerstedt · Ludwigsburg, DE

Key dates

• Filing date: Oct 11, 2011
• Grant date: Sep 6, 2016
• Expiry date: Jan 25, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0619
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method for assigning precoding vectors in a mobile cellular network as well as a base station. The base station provides a code book comprising indexed precoding vectors to mobile stations associated with the base station via a downlink channel. A mobile station selects indices of preferred precoding vectors from the code book and reports the indices to the base station via an uplink channel. The mobile selects indices of preferred companion precoding vectors from the code book that shall preferably be used by the base station for other mobile stations served by the base station on the same time/frequency resource, and reports the indices associated with the preferred companion precoding vectors to the base station via the uplink channel. For each mobile station, the base station determines a precoding vector based on the reported indices of the preferred precoding vectors and the reported indices of the preferred companion precoding vectors.