Method and apparatus for transmitting and receiving R-PDCCH

• US 9,344,119 B2
• Filed: 06/17/2011
• Issued: 05/17/2016
• Est. Priority Date: 06/17/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hakseong, Seo, Hanbyul, Kim, Kijun
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Davis, Ronald H
• Application Number:
  US13/636,288
• Publication Number:
  US 20130010685A1
• Time in Patent Office: 1,796 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• CPC Class Codes: H03M 13/3723 using means or methods for the initialisation of the decoder
• CPC Class Codes: H03M 13/6508 Flexibility, adaptability, parametrability and configurability of the implementation
• CPC Class Codes: H03M 13/6525 3GPP LTE including E-UTRA
• CPC Class Codes: H04J 11/0073 Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and apparatus for transmitting and receiving a Relay Physical Downlink Control Channel (R-PDCCH) being a control channel for a relay node (RN) in a wireless communication system are disclosed. To transmit an R-PDCCH to a RN, a BS includes a processor for interleaving a predetermined number of Control Channel Elements (CCEs), mapping the interleaved CCEs to at least one Virtual Resource Block (VRB) configured for R-PDCCH transmission, mapping the at least one VRB to at least one Physical Resource Block (PRB), and a transmitter for transmitting the R-PDCCH to the RN through the at least one PRB.

Claims

1. A method for transmitting a Relay Physical Downlink Control Channel (R-PDCCH) by a base station (BS) in a wireless communication system, the method comprising:

transmitting resource region information indicating virtual resource blocks (VRBs) available for an R-PDCCH transmission to a relay node (RN) by a radio resource control (RRC) signal;

mapping the VRBs to physical resource blocks (PRBs) in a resource region using a localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method; and

transmitting R-PDCCHs to the RN on at least one PRB of the PRBs,

wherein a first R-PDCCH including a downlink (DL) grant is transmitted to the RN on a first slot of a subframe;

wherein a second R-PDCCH including an uplink (UL) grant is transmitted to the RN on a second slot of the subframe, and

wherein when the first R-PDCCH including the downlink (DL) grant is transmitted to the RN on the first slot of a PRB pair in the subframe, a physical downlink shared channel (PDSCH) for the RN is transmitted to the RN the second slot of the PRB pair in the subframe.

2. The method according to claim 1, wherein the VRBs are mapped to the PRBs so that a VRB index is one-to-one mapped to a PRB index using the localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method.

3. The method according to claim 1, wherein the R-PDCCH transmission is configured as a VRB unit.

4. The method according to claim 3, wherein the size of the VRB is 8 or 9 Resource Element Groups (REGs).

5. The method according to claim 2, wherein the VRBs are mapped to the PRBs by a frequency-first mapping manner or a time-first mapping manner.

6. The method according to claim 1, further comprising:

transmitting information indicating whether an interleaving mode is applied to the R-PDCCHs, to the RN through the RRC signal.

7. A Base Station (BS) for transmitting a Relay Physical Downlink Control Channel (R-PDCCH) in a wireless communication system, the BS comprising:

a transmitter; and

a processor configured to cause;

the transmitter to transmit resource region information indicating virtual resource blocks (VRBs) available for an R-PDCCH transmission to a relay node (RN) by a radio resource control (RRC) signal; and

wherein the processor is configured to map the VRBs to physical resource blocks (PRBs) in a resource region using a localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method,

wherein the processor is further configured to cause;

the transmitter to transmit R-PDCCHs to the RN on at least one PRB of the PRBs,

the transmitter to transmit a first R-PDCCH including a downlink (DL) grant to the RN on a first slot of a subframe, and

the transmitter to transmit a second R-PDCCH including an uplink (UL) grant to the RN on a second slot of the subframe,

when the transmitter to transmit the first R-PDCCH including the downlink (DL) grant to the RN on the first slot of a PRB pair in the subframe, the transmitter to transmit a physical downlink shared channel (PDSCH) for the RN to the RN on the second slot of the PRB pair in the subframe.

8. The BS according to claim 7, wherein the processor is further configured to map VRBs are mapped to the PRBs so that a VRB index is one-to-one mapped to a PRB index using the localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method.

9. The BS according to claim 8, wherein the processor is further configured to map the VRBs to the PRBs by a frequency-first mapping manner or a time-first mapping manner.

10. A method for receiving a Relay Physical Downlink Control Channel (R-PDCCH) at a relay node (RN) in a wireless communication system, the method comprising:

receiving resource region information indicating virtual resource blocks (VRBs) available for a R-PDCCH transmission from a base station (BS) by a radio resource control (RRC) signal;

monitoring the VRBs based on the resource region information; and

receiving R-PDCCHs from the BS on at least one PRB of PRBs, the VRBs are mapped to the PRBs in a resource region using a localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method,

wherein a first R-PDCCH including a downlink (DL) grant is received from the BS on a first slot of a subframe; and

wherein a second R-PDCCH including an uplink (UL) grant is received from the BS on a second slot of the subframe, and

wherein when the first R-PDCCH including the downlink (DL) grant is received from the BS on the first slot of a PRB pair in the subframe, a physical downlink shared channel (PDSCH) for the RN is received from the BS on the second slot of the PRB pair in the subframe.

11. The method according to claim 10, wherein the VRBs are mapped to the PRBs so that a VRB index is one-to-one mapped to a PRB index using the localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method.

12. The method according to claim 11, wherein the VRBs are mapped to PRBs by a frequency-first mapping manner or a time-first mapping manner in a PRB.

14. The method according to claim 10, further comprising:

receiving information indicating whether an interleaving mode is applied to the R-PDCCHs, from the BS through the RRC signal.

13. A relay node (RN) for receiving a Relay Physical Downlink Control Channel (R-PDCCH) in a wireless communication system, the RN comprising:

a receiver; and

a processor, wherein the processor is configured to cause;

the receiver to receive resource region information indicating virtual resource blocks (VRBs) available for a R-PDCCH transmission from a base station (BS) by a radio resource control (RRC) signal;

wherein the processor is configured to monitor the VRBs based on the resource region information;

wherein the processor is further configured to cause;

the receiver to receive R-PDCCHs from the BS on at least one PRB of PRBs, the VRBs are mapped to the PRBs in a resource region using a localized VRB (LVRB) mapping method or distributed VRB (DVRB) mapping method,

the receiver to receive a first R-PDCCH including a downlink (DL) grant from the BS on a first slot of a subframe, and

the receiver to receive a second R-PDCCH including an uplink (UL) grant from the BS on a second slot of the subframe, and

when the receiver receives the first R-PDCCH including the downlink (DL) grant from the BS on the first slot of a PRB pair in the subframe, the receiver receives a physical downlink shared channel (PDSCH) for the RN from the BS on the second slot of the PRB pair in the subframe.