OPEN LOOP MIMO MODE FOR LTE-A UPLINK

Title:

OPEN LOOP MIMO MODE FOR LTE-A UPLINK

Document Type and Number:

WIPO Patent Application WO/2012/027264

Kind Code:

A3

Abstract:

A precoding scheme to accommodate user equipment (UEs) having higher Doppler speeds. In such transmission schemes, a different precoding matrix is applied to each orthogonal frequency division multiplex (OFDM) symbol in the transmission stream. Additionally, a downlink control message format is defined to handle assignment of multiple different transmission schemes using the same message format. The downlink control message format includes a control element in one of the message fields along with a set of parameters specifically applicable to the assigned transmission scheme. Based on the value of this control element, the UE sets the specific transmission scheme and determines a set of interpretation rules uniquely associated with that transmission scheme. Using the interpretation rules, the UE is able to read the set of parameters as applied to the selected transmission scheme.

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Inventors:

LUO XILIANG (US)
GAAL PETER (US)
MONTOJO JUAN (US)
CHEN WANSHI (US)
XU HAO (US)
LUO TAO (US)
BHATTAD KAPIL (US)

Application Number:

PCT/US2011/048600

Publication Date:

April 19, 2012

Filing Date:

August 22, 2011

Export Citation:

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Assignee:

QUALCOMM INC (US)
LUO XILIANG (US)
GAAL PETER (US)
MONTOJO JUAN (US)
CHEN WANSHI (US)
XU HAO (US)
LUO TAO (US)
BHATTAD KAPIL (US)

International Classes:

H04B7/06; H04L25/03

Domestic Patent References:

WO2010088665A1	2010-08-05
WO2009153810A2	2009-12-23
WO2008150148A2	2008-12-11
WO2008098225A2	2008-08-14
WO2010081159A1	2010-07-15

Foreign References:

US20090305698A1

2009-12-10

Other References:

QUALCOMM INC: "Codebook system evaluation", 3GPP DRAFT; R1-103952 CODEBOOK SYSTEM EVALUATION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Dresden, Germany; 20100628, 5 July 2010 (2010-07-05), XP050449557
QUALCOMM INCORPORATED: "UL Transmission Modes for MIMO Transmissions", 3GPP DRAFT; R1-104805 UL TRANSMISSION MODES, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Madrid, Spain; 20100823, 27 August 2010 (2010-08-27), XP050450239

Attorney, Agent or Firm:

VIGUET, R., Ross (2200 Ross Avenue Suite 280, Dallas TX, US)

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