METHOD FOR CONTROL CHANNEL DETECTION IN A MULTICARRIER SYSTEM

• US 20110299489A1
• Filed: 12/11/2009
• Published: 12/08/2011
• Est. Priority Date: 12/11/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, So Yeon, Chung, Jae Hoon, Kwon, Yeong Hyeon
• Granted Patent: US 8,937,913 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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 1/0052 Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
• CPC Class Codes: H04L 1/0061 Error detection codes
• 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 5/001 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 5/0091 Signaling for the administration of the divided path

Abstract

The present invention relates to a method and device for reducing the level of blind decoding complexity when detecting a control channel in a broadband wireless access system supporting multicarrier operation. Examples of the present invention disclose methods for the effective blind decoding of a control channel using an explicit method and implicit methods when sending a control channel based on multicarrier operation as with a control channel for transmitting downlink or uplink allocation information under carrier aggregation conditions.

Claims

1. A method for detecting a control channel in a multi-carrier system, the method comprising:

receiving a first control signal including carrier information allocated to a terminal supporting a plurality of carriers;

performing blind decoding using the first control signal to detect the control channel; and

receiving a second control signal on the detected control channel,

wherein the terminal decodes only a specific carrier selected from a candidate carrier set based on the first control signal, without decoding all carriers allocated to the terminal.

2. The method according to claim 1, wherein the first control signal includes at least one of a number of scheduled CCs indication parameter, a PDCCH monitoring set indication, a scheduled CC indication, a bandwidth and transmission mode indication, a CCE aggregation level, the number of candidate PDCCHs, the indexes of the candidate PDCCHs, a DCI format indication, and CFI values for candidate carrier sets.

3. The method according to claim 1, wherein the carrier information includes at least one of information indicating a carrier to which the control channel allocated to the terminal is allocated, information about candidate carriers for transmitting a data channel to the terminal, information indicating an area or a carrier in which the terminal is to perform the blind decoding, and information indicating an aggregation level of each of the plurality of carriers.

4. The method according to claim 1, wherein the control channel is a Physical Downlink Control Channel (PDCCH).

5. The method according to claim 1, wherein the first control signal is a first PDCCH signal transmitted on a PDCCH.

6. The method according to claim 1, wherein the first control signal is transmitted by Radio Resource Control (RRC) signaling.

7. The method according to claim 1, wherein if the decoding of the first control signal is failed, the control channel is detected by performing blind decoding on all candidate carriers allocated to the terminal.

8. A terminal for detecting a control channel in a multi-carrier system, comprising:

a radio Frequency (RF) module for transmitting and receiving a radio signal; and

a processor for detecting the control channel,

wherein the processor is adapted to perform;

receiving a first control signal including carrier information allocated to the terminal supporting a plurality of carriers;

performing blind decoding using the first control signal to detect the control channel; and

receiving a second control signal on the detected control channel,

wherein the terminal decodes only a specific carrier selected from a candidate carrier set based on the first control signal, without decoding all carriers allocated to the terminal.

9. The terminal according to claim 8, wherein the first control signal includes at least one of a number of scheduled CCs indication parameter, a PDCCH monitoring set indication, a scheduled CC indication, a bandwidth and transmission mode indication, a CCE aggregation level, the number of candidate PDCCHs, the indexes of the candidate PDCCHs, a DCI format indication, and CFI values for candidate carrier sets.

10. The terminal according to claim 8, wherein the carrier information includes at least one of information indicating a carrier to which the control channel allocated to the terminal is allocated, information about candidate carriers for transmitting a data channel to the terminal, information indicating an area or a carrier in which the terminal is to perform the blind decoding, and information indicating an aggregation level of each of the plurality of carriers.

11. The terminal according to claim 8, wherein the control channel is a Physical Downlink Control Channel (PDCCH).

12. The terminal according to claim 8, wherein the first control signal is a first PDCCH signal transmitted on a PDCCH.

13. The terminal according to claim 8, wherein the first control signal is transmitted by Radio Resource Control (RRC) signaling.

14. The terminal according to claim 8, wherein if the decoding of the first control signal is failed, the processor of the terminal detects the control channel by performing blind decoding on all candidate carriers allocated to the terminal.