US 2014/0369436 A1Published application

Precoding matrix indicator (pmi) information transmission method and device

AssigneeChina Academy of Telecommunications Technology

InventorsRanran Zhang, Xin Su, Rakesh Tamrakar, Meifang Jing

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Abstract

Disclosed are a precoding matrix indicator (PMI) information transmission method and device, for realizing the feedback and receiving of PMIs. The PMI information feedback method provided in the present application server includes: UE determining the feedback of a PMI and a feedback mode used for feeding back the PMI; the UE determining a rank indicator (RI) and a precoding matrix in a compressed precoding matrix set and determining an RI and first PMI combined coding information value according to a preset RI and first PMI combined coding information value and a correlation list of RIs and codebook indices; and the UE employing the feedback mode to send the determined RI and first PMI combined coding information value to a base station.

Claims13

Dependent claims

A method of feeding back Precoding Matrix Indicator (PMI) information, comprising:

a User Equipment (UE) determining a need to feed back a PMI and a feedback mode for feeding back the PMI;
the UE determining a Rank Indication (RI) and a precoding matrix in a set of compressed precoding matrixes and determining a jointly encoded information value of the RI and a first PMI according to a preset correspondence relationship between the jointly encoded information value of the RI and the first PMI, the RI and a codebook index;
and
the UE sending the determined jointly encoded information value of the RI and the first PMI to a base station in the feedback mode,
wherein the preset correspondence relationship comprises:
for RI=1, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 0 to 7, and the codebook index i1 and IRI/PMI1 satisfy i1=2 IRI/PMI1;
for RI=2, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 8 to 15, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-8);
for RI=3, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 16 to 17, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-16);
for RI=4, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 18 to 19, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-18);
for RI=5, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 20 to 21, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-20);
for RI=6, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 22 to 23, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-22);
for RI=7, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 24 to 25, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-24);
and
for RI=8, the jointly encoded information value IRI/PMI1 of the RI and the first PMI is 26, and the codebook index i1 is 0.

11 more elements

A method of receiving Precoding Matrix Indicator (PMI) information, comprising:

a base station notifying a User Equipment (UE) of a need to feed back a PMI and a feedback mode for feeding back the PMI;
the base station receiving a jointly encoded information value of a Rank Indication (RI) and a first PMI fed back from the UE;
and
the base station determining the RI and a codebook index, based on the jointly encoded information value of the RI and the first PMI, according to a preset correspondence relationship between the jointly encoded information value of the RI and the first PMI, the RI and the codebook index,
wherein the preset correspondence relationship comprises:
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 0 to 7 at RI=1, and the codebook index i1 and IRI/PMI1 satisfy i1=2 IRI/PMI1;
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 8 to 15 at RI=2, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-8);
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 16 to 17 at RI=3, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-16);
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 18 to 19 at RI=4, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-18);
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 20 to 21 at RI=5, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-20);
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 22 to 23 at RI=6, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-22);
the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 24 to 25 at RI=7, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-24);
and
the jointly encoded information value IRI/PMI1 of the RI and the first PMI is 26 at RI=8, and the codebook index i1 is 0.

11 more elements

An apparatus for feeding back Precoding Matrix Indicator (PMI) information, comprising:

a first determination unit configured to determine a need to feed back a PMI and a feedback mode for feeding back the PMI;
a second determination unit configured to determine a Rank Indication (RI) and a precoding matrix in a set of compressed precoding matrixes and to determine a jointly encoded information value of the RI and a first PMI according to a preset correspondence relationship between the jointly encoded information value of the RI and the first PMI, the RI and a codebook index;
and
a sending unit configured to send the determined jointly encoded information value of the RI and the first PMI to a base station in the feedback mode,
wherein the preset correspondence relationship comprises:
for RI=1, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 0 to 7, and the codebook index i1 and IRI/PMI1 satisfy i1=2 IRI/PMI1;
for RI=2, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 8 to 15, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-8);
for RI=3, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 16 to 17, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-16);
for RI=4, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 18 to 19, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-18);
for RI=5, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 20 to 21, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-20);
for RI=6, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 22 to 23, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-22);
for RI=7, the jointly encoded information value IRI/PMI1 of the RI and the first PMI ranges from 24 to 25, and the codebook index i1 and IRI/PMI1 satisfy i1=2(IRI/PMI1-24);
and
for RI=8, the jointly encoded information value IRI/PMI1 of the RI and the first PMI is 26, and the codebook index i1 is 0.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/357,208Filed 29 Jun 2012
Priority: CN 201110355806.910 Nov 2011
Published: 18 Dec 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04B 7/0639
Feedback format: using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
H04B 7/0478
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: special codebook structures directed to feedback optimisation
H04B 7/0626
Feedback content: channel coefficients, e.g. channel state information [CSI]
H04B 7/063
Feedback content: parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection