Transmission method of downlink signal in wireless communication system and transmission apparatus therefor

• US 9,307,529 B2
• Filed: 03/04/2015
• Issued: 04/05/2016
• Est. Priority Date: 08/23/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kwon, Yeong Hyeon, Kim, So Yeon, Moon, Sung Ho, Chung, Jae Hoon, Han, Seung Hee
• Primary Examiner(s): NGUYEN, MINH TRANG T
• Application Number:
  US14/638,856
• Publication Number:
  US 20150181578A1
• Time in Patent Office: 398 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0087 when data requirements change
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method is described for receiving a physical signal by a communication apparatus in a wireless communication system supporting carrier aggregation of a first component carrier and a second component carrier. The communication apparatus receives a physical downlink control channel (PDCCH) signal on the first component carrier. The communication apparatus also receives a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on the second component carrier. The first component carrier is different from the second component carrier. A starting orthogonal frequency division multiplexing (OFDM) symbol for receiving the PDSCH signal is determined according to information received via a radio resource control (RRC) signal.

Claims

1. A method for receiving a physical signal by a communication apparatus in a wireless communication system supporting carrier aggregation of a first component carrier and a second component carrier, the method comprising:

receiving, by the communication apparatus, a physical downlink control channel (PDCCH) signal on the first component carrier; and

receiving, by the communication apparatus, a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on the second component carrier,

wherein the first component carrier is different from the second component carrier, and

wherein a starting orthogonal frequency division multiplexing (OFDM) symbol for receiving the PDSCH signal is determined according to information received via a radio resource control (RRC) signal.

2. The method according to claim 1, wherein the information received via the RRC signal indicates an OFDM symbol index of the starting OFDM symbol for receiving the PDSCH signal.

3. The method according to claim 1, wherein the PDSCH signal is mapped to resource elements in a subframe from the starting OFDM symbol in an increasing order of a subcarrier index and an OFDM symbol index of the resource elements.

4. The method according to claim 3, wherein the subframe comprises two slots, and each of the two slots comprises 6 or 7 OFDM symbols.

5. The method according to claim 1, wherein the PDCCH signal and the PDSCH signal are received in a same subframe.

6. A communication apparatus configured to receive a physical signal in a wireless communication system supporting carrier aggregation of a first component carrier and a second component carrier, the communication apparatus comprising:

a radio frequency (RF) unit; and

a processor operatively connected to the RF unit and configured to;

control the RF unit to receive a physical downlink control channel (PDCCH) signal on the first component carrier; and

control the RF unit to receive a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on the second component carrier,

wherein the first component carrier is different from the second component carrier, and

wherein a starting orthogonal frequency division multiplexing (OFDM) symbol for receiving the PDSCH signal is determined according to information received via a radio resource control (RRC) signal.

7. The communication apparatus according to claim 6, wherein the information received via the RRC signal indicates an OFDM symbol index of the starting OFDM symbol for receiving the PDSCH signal.

8. The communication apparatus according to claim 6, wherein the PDSCH signal is mapped to resource elements in a subframe from the starting OFDM symbol in an increasing order of a subcarrier index and an OFDM symbol index of the resource elements.

9. The communication apparatus according to claim 8, wherein the subframe comprises two slots, and each of the two slots comprises 6 or 7 OFDM symbols.

10. The communication apparatus according to claim 6, wherein the PDCCH signal and the PDSCH signal are received in a same subframe.

11. A method for transmitting a physical signal by a communication apparatus in a wireless communication system supporting carrier aggregation of a first component carrier and a second component carrier, the method comprising:

transmitting, by the communication apparatus, a physical downlink control channel (PDCCH) signal on the first component carrier; and

transmitting, by the communication apparatus, a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on the second component carrier,

wherein the first component carrier is different from the second component carrier, and

wherein a starting orthogonal frequency division multiplexing (OFDM) symbol for transmitting the PDSCH signal is indicated according to information transmitted via a radio resource control (RRC) signal.

12. The method according to claim 11, wherein the information transmitted via the RRC signal indicates an OFDM symbol index of the starting OFDM symbol for transmitting the PDSCH signal.

13. The method according to claim 11, wherein the PDSCH signal is mapped to resource elements in a subframe from the starting OFDM symbol in an increasing order of a subcarrier index and an OFDM symbol index of the resource elements.

14. The method according to claim 13, wherein the subframe comprises two slots, and each of the two slots comprises 6 or 7 OFDM symbols.

15. The method according to claim 11, wherein the PDCCH signal and the PDSCH signal are received in a same subframe.

16. A communication apparatus configured to transmit a physical signal in a wireless communication system supporting carrier aggregation of a first component carrier and a second component carrier, the communication apparatus comprising:

a radio frequency (RF) unit; and

a processor operatively connected to the RF unit and configured to;

control the RF unit to transmit a physical downlink control channel (PDCCH) signal on the first component carrier; and

control the RF unit to transmit a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal on the second component carrier,

wherein the first component carrier is different from the second component carrier, and

wherein a starting orthogonal frequency division multiplexing (OFDM) symbol for transmitting the PDSCH signal is indicated according to information transmitted via a radio resource control (RRC) signal.

17. The communication apparatus according to claim 16, wherein the information transmitted via the RRC signal indicates an OFDM symbol index of the starting OFDM symbol for transmitting the PDSCH signal.

18. The communication apparatus according to claim 16, wherein the PDSCH signal is mapped to resource elements in a subframe from the starting OFDM symbol in an increasing order of a subcarrier index and an OFDM symbol index of the resource elements.

19. The communication apparatus according to claim 18, wherein the subframe comprises two slots, and each of the two slots comprises 6 or 7 OFDM symbols.

20. The communication apparatus according to claim 16, wherein the PDSCH signal and the PDSCH signal are received in a same subframe.