Communicating channel state information (CSI) of multiple transmission points

Patent metadata

Field	Value
Publication number	US-9532362-B2
Application number	US-201313909242-A
Country	US
Kind code	B2
Filing date	Jun 4, 2013
Priority date	Jun 4, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

Embodiments contemplate methods and systems for determining and communicating channel state information (CSI) for one or more transmission points (or CSI reference signal resources). Embodiments further contemplate determining transmission states may include applying at least one CSI process for channel state information (CSI) reporting. Embodiments also contemplate aperiodic and/or periodic reporting of one or more report types (e.g., rank indicator (RI)) of CSI, perhaps based on one or more reporting modes that may be configured for each of the one or more CSI process.

First claim

What is claimed is:

1. A wireless transmit/receive unit (WTRU), the WTRU in communication with one or more serving cells, the WTRU comprising:
a processor, the processor configured at least with:
one or more channel state information (CSI) processes for each of the one or more serving cells;
a period for a set of subframes; and
an offset for the set of subframes, the processor configured to:
generate a first periodic report corresponding to a first CSI process of the one or more CSI processes and a first serving cell of the one or more serving cells; and

a transmitter, the transmitter configured to:
send the first periodic report on the set of subframes via a physical channel including at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), wherein the first report corresponds to a first type of one or more report types, and processor is further configured with:
a respective priority for each of the one or more report types;

a respective priority for each of the one or more serving cells; and
a respective priority for each of the one or more CSI processes, and the processor is further configured to:
generate a second periodic report corresponding to a second CSI process of the one or more CSI processes and a second serving cell of the one or more serving cells, the second periodic report corresponding to at least one report type of the one or more report types having a same respective priority as the first report type, the second CSI process having a respective priority higher than a respective priority of the first CSI process; and
drop the first periodic report upon a collision between the first periodic report and the second periodic report, based at least on the respective priority of the second CSI process being higher than the respective priority of the first CSI process, the processor being further configured such that the second CSI process having a higher respective priority than the respective priority of the first CSI process corresponds to the second CSI process having a respective CSI process identifier of a lower numerical value than a respective CSI process identifier of the first CSI process.

2. A wireless transmit/receive unit (WTRU), the WTRU in communication with one or more serving cells, the WTRU comprising:
a processor, the processor configured at least with:
one or more channel state information (CSI) processes for each of the one or more serving cells;
a period for a set of subframes; and
an offset for the set of subframes, the processor configured to:
generate a first periodic report corresponding to a first CSI process of the one or more CSI processes and a first serving cell of the one or more serving cells; and

a transmitter, the transmitter configured to:
send the first periodic report on the set of subframes via a physical channel including at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH),wherein the first report corresponds to a first type of one or more report types, and processor is further configured with:
a respective priority for each of the one or more report types;

a respective priority for each of the one or more serving cells; and
a respective priority for each of the one or more CSI processes, and the processor is further configured to:
generate a second periodic report corresponding to a second CSI process of the one or more CSI processes and a second serving cell of the one or more serving cells, the second periodic report corresponding to at least one report type of the one or more report types having the same respective priority as the first report type, the second CSI process having a respective priority higher than a respective priority of the first CSI process;
generate a third periodic report corresponding to the first CSI process of the one or more CSI processes and a third serving cell of the one or more serving cells, the third periodic report corresponding to at least one report type of the one or more report types having the same respective priority as the first report type; and

drop the first periodic report and the third periodic report upon a collision between either the first periodic report and the second periodic report or between the second periodic report and the third periodic report, based at least on the respective priority of the second CSI process being higher than the respective priority of the first CSI process, the processor being further configured such that the second CSI process having a higher respective priority than the respective priority of the first CSI process corresponds to the second CSI process having a respective CSI process identifier of a lower numerical value than a respective CSI process identifier of the first CSI process.

3. A wireless transmit/receive unit (WTRU), the WTRU in communication with one or more serving cells, the WTRU comprising:
a processor, the processor configured at least with:
one or more channel state information (CSI) processes for each of the one or more serving cells;
a period for a set of subframes; and
an offset for the set of subframes, the processor configured to:
generate a first periodic report corresponding to a first CSI process of the one or more CSI processes and a first serving cell of the one or more serving cells; and

a transmitter, the transmitter configured to:
send the first periodic report on the set of subframes via a physical channel including at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), wherein the first report corresponds to a first type of one or more report types, and processor is further configured with:
a respective priority for each of the one or more report types;
a respective priority for each of the one or more serving cells; and
a respective priority for each of the one or more CSI processes, and the processor is further configured to:
generate a second periodic report corresponding to a second CSI process of the one or more CSI processes and a second serving cell of the one or more serving cells, the second periodic report corresponding to at least one report type of the one or more report types having the same respective priority as the first report type, the second CSI process having a respective priority higher than a respective priority of the first CSI process;
generate a third periodic report corresponding to a third CSI process of the one or more CSI processes and a third serving cell of the one or more serving cells, the third report corresponding to at least one report type of the one or more report types having the same respective priority as the first report type, the second CSI process having a respective priority higher than a respective priority of the third CSI process; and
drop the first periodic report and the third periodic report upon a collision between either the first periodic report and the second periodic report or between the second periodic report and the third periodic report, based at least on the respective priority of the second CSI process being higher than the respective priority of the first CSI process or the second CSI process having a respective priority higher than a respective priority of the third CSI process, the processor being further configured such that:

the second CSI process having a higher respective priority than the respective priority of the first CSI process corresponds to the second CSI process having a respective CSI process identifier of a lower numerical value than a respective CSI process identifier of the first CSI process; and
the second CSI process having a higher respective priority than the respective priority of the third CSI process corresponds to the numerical value of the CSI process identifier of the second CSI process being lower than a nu

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Marinier Paul
• Pani Diana
• Tooher J Patrick
• Rudolf Marian

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/563

  of the wireless resources · CPC title

• H04B7/024

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title