The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 27, 2018

Filed:

Aug. 12, 2016
Applicant:

Sprint Spectrum Lp, Overland Park, KS (US);

Inventors:

Yu Zhou, Herndon, VA (US);

Muhammad Ahsan Naim, Ashburn, VA (US);

Luca Zappaterra, Eindhoven, NL;

Assignee:

Sprint Spectrum L.P., Overland Park, KS (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 5/00 (2006.01); H04W 72/04 (2009.01);
U.S. Cl.
CPC ...
H04L 5/0048 (2013.01); H04L 5/006 (2013.01); H04L 5/0082 (2013.01); H04W 72/0446 (2013.01);
Abstract

Transmitting downlink reference signals includes transmitting a first plurality of subframes comprising a first reference signal associated with a first antenna port, the first reference signal having a first format within the first plurality of subframes, transmitting a second plurality of subframes comprising a second reference signal associated with a second antenna port, the second reference signal having a second format within the second plurality of subframes, and switching a format of each of the first and second reference signals, such that a third plurality of subframes is transmitted with the first reference signal in the second format, and a fourth plurality of subframes is transmitted with the second reference signal in the first format.


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