APPARATUS AND METHOD FOR TRANSMITTING CONTROL INFORMATION IN A MULTI-COMPONENT CARRIER SYSTEM

• US 20130051355A1
• Filed: 05/03/2011
• Published: 02/28/2013
• Est. Priority Date: 05/03/2010
• Status: Abandoned Application

• Current Assignee: Pantech Co. Ltd. (Pantech Incorporated)
• Original Assignee: Pantech Co. Ltd. (Pantech Incorporated)
• Inventors: Hong, Sung Kwon
• Application Number:
  US13/696,012
• Publication Number:
  US 20130051355A1
• Time in Patent Office: Days
• US Class Current: 370/329
• 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated

Abstract

A method for transmitting control information in a multi-component carrier system comprises: configuring downlink control information containing a format indicator that indicates the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for a control domain; configuring the control domain in accordance with the number of OFDM symbols; transmitting a physical downlink control channel (PDCCH) containing the thus-configured downlink control information; and transmitting a physical control format indicator channel, containing the format indicator, to the control domain. According to the exemplary embodiments, multiple errors in detecting a PDCCH and a physical downlink shared channel (PDSCH) caused by an error in detecting a physical control format indicator channel (PCFICH) for a sub-component carrier can be easily resolved.

Claims

1. A method of a base station transmitting control information in a multi-component carrier system in which a primary component carrier and a secondary component carrier are aggregated, the method comprising the steps of:

configuring downlink control information (DL grant) comprising a format indicator indicative of a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for a control region;

configuring the control region according to the number of OFDM symbols;

transmitting a physical downlink control channel (hereinafter referred to as a PDCCH) comprising the configured downlink control information; and

transmitting a physical control format indicator channel (hereinafter referred to as a PCFICH), comprising the format indicator, on the control region.

2. The method of claim 1, further comprising the step of receiving uplink control information from a user equipment through an uplink control channel configured based on the downlink control information.

3. The method of claim 2, further comprising the step of receiving downlink control information comprising a power indicator, wherein the power indicator indicates transmit power of the uplink control channel.

4. The method of claim 2, wherein information bits of the format indicator and the power indicator have an identical length.

5. The method of claim 1, wherein:

the PDCCH is transmitted on the primary component carrier,

the control region is a control region of the secondary component carrier, and

the PCFICH is transmitted on the secondary component carrier.

6. A method of a user equipment receiving control information in a multi-component carrier system in which a primary component carrier and a secondary component carrier are aggregated, the method comprising the steps of:

receiving first downlink control information, comprising a format indicator indicative of a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols that form a control region, from a base station through a first physical downlink control channel (PDCCH); and

transmitting uplink control information to the base station through a physical uplink control channel (PUCCH).

7. The method of claim 6, wherein:

the first PDCCH is transmitted on the primary component carrier, and

the control region is a control region of the secondary component carrier.

8. The method of claim 7, further comprising the step of receiving second downlink control information comprising a power indicator from the base station through a second PDCCH of the primary component downlink carrier, wherein the power indicator indicates transmit power of the PUCCH.

9. An apparatus for receiving control information in a multi-component carrier system in which a primary component carrier and a secondary component carrier are aggregated, the apparatus comprising:

a control information reception unit for receiving first downlink control information, comprising a format indicator indicative of a number of OFDM symbols for a control region, through a first PDCCH and receiving second downlink control information, comprising a power indicator for controlling transmit power of an uplink control channel, through a second PDCCH;

a control channel decoding unit for decoding a physical control format indicator channel (PCFICH) and a physical downlink shared channel (PDSCH) indicated by the first PDCCH based on the format indicator; and

an uplink transmission unit for controlling transmit power of a uplink control channel regarding the PDSCH based on the power indicator and transmitting the uplink control channel.

10. The apparatus of claim 9, wherein the control information reception unit receives the first PDCCH and the second PDCCH on the primary component carrier.

11. The apparatus of claim 9, wherein the control information reception unit receives the first PDCCH on the secondary component carrier and receives the second PDCCH on the primary component carrier.

12. An apparatus for transmitting control information in a multi-component carrier system in which a primary component carrier and a secondary component carrier are aggregated, the apparatus comprising:

a control information configuration unit for configuring first downlink control information, comprising a format indicator indicative of a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for a control region, and second downlink control information comprising a power indicator for controlling transmit power of an uplink control channel;

a control information transmission unit for transmitting the first downlink control information through a first physical downlink control channel (PDCCH) and transmitting the second downlink control information through a second PDCCH; and

an uplink reception unit for receiving an uplink control channel transmitted at transmit power based on the power indicator related to a physical downlink shared channel (PDSCH) indicated by the first PDCCH.

13. The apparatus of claim 12, wherein the control information transmission unit transmits the first PDCCH and the second PDCCH on the primary component carrier.

14. The apparatus of claim 12, wherein the control region includes 2 or 3 OFDM symbols.