Method and apparatus for transmitting CSI-RS and data using partial muting of CSI-RS

Patent metadata

Field	Value
Publication number	US-9287905-B2
Application number	US-201414196606-A
Country	US
Kind code	B2
Filing date	Mar 4, 2014
Priority date	Jun 11, 2010
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A method and apparatus for transmitting Channel State Information Reference Symbol (CSI-RS) and data with partial muting of the CSI-RS are proposed. The method includes determining a CSI-RS pattern to be used among CSI-RS pattern candidates, determining a muting pattern for muting some resource elements constituting CSI-RS pattern candidates except for the determined CSI-RS pattern, mapping data symbols and CSI-RS to resource elements in a resource grid with rate patching in consideration of the CSI-RS pattern and muting pattern, and transmitting the data symbols and CSI-RS to a terminal.

First claim

What is claimed is:

1. A method for transmitting a channel state information reference signal (CSI-RS) by a base station, the method comprising:
selecting a CSI-RS pattern including a first set of resource elements (REs);
selecting a muting pattern including a second set of REs;
transmitting an indicator indicating the muting pattern among a plurality of predefined muting patterns and period information applied to the muting pattern via higher layer signaling;
mapping data symbols and the CSI-RS to REs based on the CSI-RS pattern and the muting pattern; and
transmitting the data symbols and the CSI-RS to a user equipment (UE),
wherein the data symbols are mapped to REs that are not included in the CSI-RS pattern and the muting pattern,
wherein the muting pattern is selected among the plurality of predefined muting patterns and the plurality of predefined muting patterns are included in a set of CSI-RS pattern candidates, and
wherein the indicator comprises a plurality of bits corresponding to the plurality of predefined muting patterns.

2. The method of claim 1 , wherein the first set of REs and the second set of REs are composed of a pair of REs.

3. The method of claim 1 , wherein the CSI-RS pattern and the muting pattern are included in the set of CSI-RS pattern candidates.

4. A method for receiving a channel state information reference signal (CSI-RS) by a user equipment (UE), the method comprising:
receiving an indicator indicating a muting pattern among a plurality of predefined muting patterns and period information applied to the muting pattern via higher layer signaling;
receiving data symbols and the CSI-RS mapped to resource elements (REs) from a base station;
extracting the data symbols based on a CSI-RS pattern including a first set of REs and the muting pattern including a second set of REs;
wherein the data symbols are mapped to REs that are not included in the CSI-RS pattern and the muting pattern,
wherein the muting pattern is selected among the plurality of predefined muting patterns and the plurality of predefined muting patterns are included in a set of CSI-RS pattern candidates, and
wherein the indicator comprises a plurality of bits corresponding to the plurality of predefined muting patterns.

5. The method of claim 4 , wherein the first set of REs and the second set of REs are composed of a pair of REs.

6. The method of claim 5 , wherein the CSI-RS pattern and the muting pattern are included in the set of CSI-RS pattern candidates.

7. A base station for transmitting a channel state information reference signal (CSI-RS), the base station comprising:
a transceiver transmitting and receiving signals to and from a user equipment (UE); and
a controller controls to select a CSI-RS pattern including a first set of resource elements (REs), select a muting pattern including a second set of REs, to transmit an indicator indicating the muting pattern among a plurality of predefined muting patterns and period information applied to the muting pattern via higher layer signaling, map data symbols and the CSI-RS to REs based on the CSI-RS pattern and the muting pattern, and transmit the data symbols and the CSI-RS to a user equipment (UE), and
wherein the data symbols are mapped to REs that are not included in the CSI-RS pattern and the muting pattern,
wherein the muting pattern is selected among the plurality of predefined muting patterns and the plurality of predefined muting patterns are included in a set of CSI-RS pattern candidates, and
wherein the indicator comprises a plurality of bits corresponding to the plurality of predefined muting patterns.

8. The base station of claim 7 , wherein the first set of REs and the second set of REs are composed of a pair of REs.

9. The base station of claim 7 , wherein the CSI-RS pattern and the muting pattern are included in the set of CSI-RS pattern candidates.

10. A user equipment apparatus for receiving a channel state information reference signal (CSI-RS), the apparatus comprising:
a transceiver transmitting and receiving signals to and from a base station; and
a controller controls to receive an indicator indicating a muting pattern among a plurality of predefined muting patterns and period information applied to the muting pattern via higher layer signaling, to receive data symbols and the CSI-RS mapped to resource elements (REs) from a base station, and extract the data symbols based on a CSI-RS pattern including a first set of REs and the muting pattern including a second set of REs, and
wherein the data symbols are mapped to REs that are not included in the CSI-RS pattern and the muting pattern,
wherein the muting pattern is selected among the plurality of predefined muting patterns and the plurality of predefined muting patterns are included in a set of CSI-RS pattern candidates, and
wherein the indicator comprises a plurality of bits corresponding to the plurality of predefined muting patterns.

11. The apparatus of claim 10 , wherein the first set of REs and the second set of REs are composed of a pair of REs.

12. The apparatus of claim 10 , wherein the CSI-RS pattern and the muting pattern are included in the set of CSI-RS pattern candidates.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Sung Tae
• Kim Youn Sun
• Han Jin-Kyu
• Yeon Myung Hoon
• Shan Cheng

Classifications

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0044 Primary

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04B1/0475 Primary

  with means for limiting noise, interference or distortion (H04B1/0483 takes precedence) · CPC title