InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,826,490
Cai , et al. November 21, 2017

Power control for closed loop transmit diversity and MIMO in uplink


Abstract

A method for dynamically controlling the transmit power of transmission streams transmitted via multiple antennas is disclosed. A transmit power level for multiple streams is determined based on a first reference channel. The difference of signal to interface ratios (SIRs) between two reference channels may represent a power offset. The power offset may be used to determine gain factors used to transmit data channels on the secondary stream with reference to the gain factor of the first reference channel. The power offset may be used to determine other parameters, such a serving grant or transport block sizes of channels carried on the secondary stream. The power offset may allow transmission parameters of channels on the secondary stream to be determined based on the transmit power level of the primary stream and a gain factor for a reference channel transmitted via the primary stream.



Inventors:
Cai; Lujing (Morganville, NJ), Pelletier; Benoit (Roxboro, CA), Zhang; Hong O. (Manalapan, NJ), Xi; Fengjun (San Diego, CA)

Applicant:


Name

City

State

Country

Type


InterDigital Patent Holdings, Inc.
Wilmington
DE
US


Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)


Family ID:
1000002966164

Appl. No.:
15/181,498

Filed:
June 14, 2016


Prior Publication Data






Document Identifier

Publication Date

US 20160295530 A1 Oct 6, 2016



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

14035221 Sep 24, 2013
13082725 Oct 29, 2013 8571488
61322448 Apr 9, 2010
61330153 Apr 30, 2010
61410682 Nov 5, 2010
61431237 Jan 10, 2011




Current U.S. Class: 1/1
Current CPC Class: H04W 52/42 (20130101); H04B 7/0404 (20130101); H04B 7/0413 (20130101); H04W 52/146 (20130101); H04B 7/0623 (20130101); H04W 52/08 (20130101); H04B 7/0426 (20130101)
Current International Class: H04B 1/00 (20060101); H04B 7/06 (20060101); H04B 7/0426 (20170101); H04B 7/0404 (20170101); H04W 52/42 (20090101); H04W 52/08 (20090101); H04B 7/0413 (20170101); H04W 52/14 (20090101)
Field of Search: ;455/101,102,69,522,456.6

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