Method and apparatus for allocating a pilot signal adapted to the channel characteristics

US9847861B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Johan Nyström · Stockholm, SE
• Pål Frenger · Linköping, SE
• Erik Dahlman · Stockholm, SE
• Svante Signell · Sundbyberg, SE
• Göran N. Klang · Solna, SE

Key dates

• Filing date: Aug 21, 2014
• Grant date: Dec 19, 2017
• Expiry date: Dec 15, 2035

Classification

• Technology area (CPC —): General

Abstract

A set of different pilot structures are designed for use in different environments and/or different user behaviors that are expected to occur in a cell. The radio conditions for a user are estimated. Each user is then assigned an area (108A-E) in resource space for its communication, which has a suitable pilot configuration. In one embodiment, the entire resource space is provided with different pilot structures in different parts (110A-D) In advance and allocation of resources to the users are then performed in order to match estimated radio conditions to the provided pilot structure. In another embodiment, allocation is performed first, and then the actual pilot structure is adapted within the allocated resource space area to suit the environmental conditions.