Methods and apparatus for precoding control in a wireless communication network

US10149306B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Jonas Fröberg Olsson · Ljungsbro, SE
• Mirsad Cirkic · Linköping, SE
• Martin Hessler · Linköping, SE
• Kristina Hessler · Säter, SE

Key dates

• Filing date: Apr 7, 2017
• Grant date: Dec 4, 2018
• Expiry date: Apr 7, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W72/0466
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Techniques disclosed herein involve network-side and device-side operations that provide for the advantageous use of a reduced set of precoders within a larger full set of precoders. The reduced set is identified dynamically, based on characteristics of the channel between a radio network node and a wireless device, and the use of a defined mapping function that maps the reduced set of precoders within the larger full set to a reduced set of index values. Reporting precoders from the reduced set offers significant reductions in signaling overhead because of the smaller size of the index values used to index the reduced set, while simultaneously offering the ability to choose from precoders matched to current channel conditions.