Carrier construction for effective control channel decoding

• US 8,724,571 B2
• Filed: 03/20/2010
• Issued: 05/13/2014
• Est. Priority Date: 04/20/2009
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chung, Jae Hoon, Cho, Han Gyu, Kim, So Yeon, Kwon, Yeong Hyeon
• Primary Examiner(s): CHAN, SAI MING
• Application Number:
  US13/265,305
• Publication Number:
  US 20120051306A1
• Time in Patent Office: 1,515 Days
• Field of Search: 370/329, 370/339
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• 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
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus in which a terminal processes a downlink control channel in a wireless communication system that supports carrier aggregation. The method comprises the steps of: checking a plurality of carrier groups from a plurality of downlink component carriers (DL CCs); receiving a control information region through at least a portion of the plurality of DL CCs; performing blind decoding on control channels in the control information region in a first carrier group; and performing blind decoding on control channels in the control information region in a second carrier group. The present invention also relates to an apparatus for the method.

Claims

1. A method for receiving a data at a UE (User Equipment) in a wireless communication system supporting carrier aggregation, the method comprising:

configuring j carrier groups, wherein j is an integer of 2 or more; and

performing a procedure for receiving the data from Component Carrier (CC) #i,

wherein the procedure includes;

detecting a Physical Downlink Control Channel (PDCCH) for the UE by blind decoding PDCCH candidates in a carrier group #(i % j) of the j carrier groups, wherein the ‘

i % j’

represents a remainder of dividing i by j, and

receiving the data through a Physical Downlink Shared Channel (PDSCH) corresponding the PDCCH in the CC #i.

2. The method according to claim 1, wherein the PDCCH is transmitted in a control information region in a subframe, in which the control information includes one or more contiguous OFDM (Orthogonal Frequency Division Multiplexing) symbols.

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

receiving information of a number of carrier groups through RRC (Radio Resource Control) signaling or L1/L2 (Layer1/Layer2) control signaling.

4. A UE (User Equipment) supporting carrier aggregation, comprising:

a Radio Frequency (RF) unit for transmitting and receiving a radio signal to and from a Base Station (BS) on multiple component carriers (CCs);

a memory for storing information transmitted to and received from the BS and a parameter needed for an operation of the UE; and

a processor connected to the RF unit and the memory, for controlling the RF unit and the memory,

wherein the processor comprises to configure j carrier groups, wherein j is an integer of 2 or more; and

to perform a procedure for receiving the data from Component Carrier (CC) #i,

wherein the procedure includes;

detecting a Physical Downlink Control Channel (PDCCH) for the UE by blind decoding PDCCH candidates in a carrier group #(i % j) of the j carrier groups, wherein the ‘

i % j’

represents the remainder of dividing i by j, and receiving the data through a Physical Downlink Shared Channel (PDSCH) corresponding the PDCCH in the CC #i.

5. The UE according to claim 4, wherein the PDCCH is transmitted in a control information region in a subframe, in which the control information includes one or more contiguous OFDM (Orthogonal Frequency Division Multiplexing) symbols.

6. The UE according to claim 4, further comprising:

receiving information of a number of carrier groups through RRC (Radio Resource Control) signaling or L1/L2 (Layer1/Layer2) control signaling.