US8982829B2

5G,4G

Title

Method and apparatus for transmitting downlink reference signal in wireless communication system that supports multiple antennas

Application Number:

US201414218338

Publication Date:

17-03-2015

Current Assignee:

LG

Family ID:

Application Date:

18-03-2014

Publication Country:

US

Priority Date:

14-08-2009

Declaring Company:

LG

Abstract  Abstract

The present invention relates to a wireless communication system and in particular to a method and an apparatus for transmitting a downlink reference signal in a wireless communication system that supports multiple antennas. The method for transmitting a reference signal for a maximum of eight antenna ports according to one embodiment of the present invention comprises: in a base station mapping part of a common reference signal for a maximum of four antenna ports into a downlink subframe that includes a 1 st slot and a 2nd slot; in the base station mapping a channel status information reference signal for the maximum of eight antenna ports into the downlink subframe according to a preset pattern; and in the base station transmitting the downlink subframe into which the common reference signal and the channel status information reference signal have been mapped wherein the preset pattern defines the channel status information reference signal for the maximum of eight antenna ports to be mapped onto two OFDM symbols of the data region in the downlink subframe and wherein part of the common reference signal for the maximum of four antenna ports is limited to the common reference signal for a maximum of two antenna ports.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.