Method of resource block (RB) bundling

• US 9,008,009 B2
• Filed: 11/05/2010
• Issued: 04/14/2015
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Roh, Dongwook, Lee, Daewon, Kim, Bonghoe, Noh, Yujin, Kang, Byeongwoo
• Primary Examiner(s): RENNER, BRANDON M
• Application Number:
  US12/940,730
• Publication Number:
  US 20110110444A1
• Time in Patent Office: 1,621 Days
• Field of Search: 370/329
• US Class Current: 370/329
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 25/0232 by interpolation between sounding signals
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 27/26526 with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/00 : Local resource management
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 72/53 : based on regulatory allocation policies

Abstract

A method of sizing bundled resource blocks (RBs) having at least one user equipment (UE)-specific demodulation reference signal in an orthogonal frequency division multiplexing (OFDM) system is disclosed. According to one embodiment, the method includes: receiving configuration information related to at least one UE-specific demodulation reference signal; receiving a plurality of resource blocks (RBs) from a network, wherein the plurality of resource blocks comprises the at least one UE-specific demodulation reference signal, at least one cell-specific demodulation reference signal or data, wherein a number of the plurality of RBs is dependent on a size of a system bandwidth, the size of the system bandwidth corresponding to one of four size ranges; and processing at least one of the received plurality of RBs by bundling the plurality of RBs into RB bundles, wherein the size of each RB bundle is based on the one of the four size ranges.

Claims

1. A method of bundling resource blocks (RBs) including user equipment (UE)-specific reference signals at a UE in a wireless communication system, the method comprising:

receiving information related to a system bandwidth from a base station (BS), wherein a RB size for resource allocation corresponding to a RB size of the system bandwidth is configured as a resource block group (RBG) size for resource allocation of Table A;

receiving at least one RB group including a plurality of RBs from the BS, each of the plurality of RBs comprising a plurality of contiguous subcarriers and a plurality of contiguous orthogonal frequency division multiplexing (OFDM) symbols; and

evaluating information related to a channel quality in unit of a size of a RB group corresponding to the system bandwidth in case that the plurality of RBs comprise the UE-specific reference signals, the evaluating is performed based on the UE-specific reference signals,

wherein the size of the RB group corresponding to the system bandwidth is in accordance with a RBG size for evaluating the information related to the channel quality of Table A,

wherein the information related to the channel quality is evaluated in unit of 1 RB when the system bandwidth is smaller than or equal to 10 RBs,

wherein the information related to the channel quality is evaluated in unit of 2 RBs when the system bandwidth is between 11 RBs and 26 RBs, and

wherein the information related to the channel quality is evaluated in unit of 3 RBs when the system bandwidth is between 27 RBs and 63 RBs,

2. The method of claim 1,

wherein the information related to the channel quality comprises a precoding matrix indicator (PMI) or a rank indicator (RI) for the at least one RB group.

3. The method of claim 1, wherein the RB group comprises a plurality of contiguous RBs of the system bandwidth.

4. The method of claim 1, wherein the UE-specific reference signals are received through a physical downlink shared channel (PDSCH).

5. The method of claim 1, wherein the information related to the channel quality is evaluated in unit of at least 1 RB, 2 RBs or 3 RBs when the system bandwidth is between 64 RBs and 110 RBs in accordance with Table B below.

6. A method of receiving channel quality information at a base station (BS) in a wireless communication system, the method comprising:

transmitting information related to a system bandwidth to a user equipment (UE), wherein a RB size for resource allocation corresponding to a RB size of the system bandwidth is configured as a resource block group (RBG) size for resource allocation of Table A; and

receiving information related to a channel quality from the UE,

wherein the information related to the channel quality is evaluated in unit of a size of a RB group corresponding to the system bandwidth in case that a plurality of RBs comprise UE-specific reference signals,

wherein the size of the RB group corresponding to the system bandwidth is in accordance with a RBG size for evaluating the information related to the channel quality of Table A,

wherein the information related to the channel quality is evaluated in unit of 1 RB when the system bandwidth is smaller than or equal to 10 RBs,

wherein the information related to the channel quality is evaluated in unit of 2 RBs when the system bandwidth is between 11 RBs and 26 RBs, and

wherein the information related to the channel quality is evaluated in unit of 3 RBs when the system bandwidth is between 27 RBs and 63 RBs,

7. The method of claim 6, wherein the information related to the channel quality is evaluated in unit of at least 1 RB, 2 RBs or 3 RBs when the system bandwidth is between 64 RBs and 110 RBs in accordance with Table B below.

8. A user equipment (UE) for bundling resource blocks (RBs) in a wireless communication system, the UE comprising:

a radio frequency (RF) unit configured to receive information related to a system bandwidth from a base station (BS) and at least one RB group including a plurality of RBs from the BS, each of the plurality of RBs comprising a plurality of contiguous subcarriers and a plurality of contiguous orthogonal frequency division multiplexing (OFDM) symbols, wherein a RB size for resource allocation corresponding to a RB size of the system bandwidth is configured as a resource block group (RBG) size for resource allocation of Table A; and

a processor configured to evaluate information related to a channel quality in unit of a size of a RB group corresponding to the system bandwidth in case that the plurality of RBs comprise UE-specific reference signals,

wherein the size of the RB group corresponding to the system bandwidth is in accordance with a RBG size for evaluating the information related to the channel quality of Table A,

wherein the information related to the channel quality is evaluated in unit of 1 RB when the system bandwidth is smaller than or equal to 10 RBs,

wherein the information related to the channel quality is evaluated in unit of 2 RBs when the system bandwidth is between 11 RBs and 26 RBs, and

wherein the information related to the channel quality is evaluated in unit of 3 RBs when the system bandwidth is between 27 RBs and 63 RBs,

9. The UE of claim 8, wherein the RB group comprises a plurality of contiguous RBs of the system bandwidth.

10. The UE of claim 8, wherein the information related to the channel quality comprises a precoding matrix indicator (PMI) or a rank indicator (RI) for the at least one RB group.

11. The UE of claim 8, wherein the information related to the channel quality is evaluated in unit of at least 1 RB, 2 RBs or 3 RBs when the system bandwidth is between 64 RBs and 110 RBs in accordance with Table B below.

12. A base station (BS) for sizing bundled resource blocks (RBs) in a wireless communication system, the BS comprising:

a radio frequency (RF) unit; and

a processor configured to cause;

the RF unit to transmit information related to a system bandwidth to a user equipment (UE) and to receive information related to channel quality from the UE,

wherein a RB size for resource allocation corresponding to a RB size of the system bandwidth is configured as a resource block group (RBG) size for resource allocation of Table A,

wherein the channel quality is evaluated in unit of a size of a RB group corresponding to the system bandwidth, the size of the RB group corresponding to the system bandwidth in accordance with a RBG size for evaluating the information related to the channel quality of Table A,

wherein the information related to the channel quality is evaluated in unit of 1 RB when the system bandwidth is smaller than or equal to 10 RBs,

wherein the information related to the channel quality is evaluated in unit of 2 RBs when the system bandwidth is between 11 RBs and 26 RBs, and

wherein the information related to the channel quality is evaluated in unit of 3 RBs when the system bandwidth is between 27 RBs and 63 RBs

13. The BS of claim 12, wherein the information related to the channel quality is evaluated in unit of at least 1 RB, 2 RBs or 3 RBs when the system bandwidth is between 64 RBs and 110 RBs in accordance with Table B below.