Method and apparatus for receiving a control channel in a mobile communication system

• US 8,948,092 B2
• Filed: 03/20/2008
• Issued: 02/03/2015
• Est. Priority Date: 03/21/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Heo, Youn-Hyoung, Cho, Joon-Young, Zhang, Yujian, Lee, Ju-Ho, Han, Jin-Kyu
• Primary Examiner(s): Ferris, Derrick
• Assistant Examiner(s): Sciacca, Scott M
• Application Number:
  US12/052,226
• Publication Number:
  US 20080232322A1
• Time in Patent Office: 2,511 Days
• Field of Search: 370/329, 370/330, 455/450
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0004 applied to control information
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0039 other detection of signalling, e.g. detection of TFCI explicit signalling H04L1/0046, H04L27/0012 and H04L25/0262 take precedence
• 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 28/04 Error control

Abstract

A method and apparatus for receiving control information in a mobile communication system. A controller acquires information indicating variable Control Channel Elements (CCEs) allocated for first User Equipments (UEs) among CCEs constituting control channels, acquires information indicating fixed CCEs allocated for second UEs, selects the variable CCEs when a UE receiving the control information is included in the first UEs, and selects the fixed CCEs when the UE is included in the second UEs. A control information receiver receives the control information through the selected CCEs.

Claims

1. A method for receiving control information by a User Equipment (UE) in a mobile communication system, the method comprising:

if the UE operates in a non-Discontinuous Reception (DRX) mode, receiving information indicating variable Control Channel Elements (CCEs) allocated for first UEs operating in the non-DRX mode among CCEs included in control channels used in the mobile communication system, selecting the variable CCEs, and receiving the control information over a control channel including the selected CCEs, the information including information on a location of the variable CCEs and Modulation and Coding Scheme (MCS) level information for the variable CCEs; and

if the UE operates in a DRX mode, receiving information indicating fixed CCEs allocated for second UEs operating in the DRX mode, selecting the fixed CCEs, and receiving the control information over the control channel including the selected CCEs, the information including information on a location of the fixed CCEs and MCS level information for the fixed CCEs,

wherein one CCE includes at least one Resource Element (RE) and is allocated for a common control channel.

2. The method of claim 1, wherein the variable CCEs are determined according to a number of CCEs used by a base station.

3. The method of claim 1, wherein the fixed CCEs are determined independently of a number of CCEs used by a base station and ACKnowledge/Not-ACKnowledge (ACK/NACK) transmission resources.

4. An apparatus for receiving control information in a mobile communication system, the apparatus comprising:

a processor for acquiring information indicating variable Control Channel Elements (CCEs) allocated for first User Equipments (UEs) operating in a non-Discontinuous Reception (DRX) mode among CCEs constituting control channels and selecting the variable CCEs if a UE operates in the non-DRX mode, the information including information on a location of the variable CCEs and Modulation and Coding Scheme (MCS) level information for the variable CCEs, and acquiring information indicating fixed CCEs allocated for second UEs operating in a DRX mode and selecting the fixed CCEs if the UE operates in the DRX mode, the information including information on a location of the fixed CCEs and MCS level information for the fixed CCEs; and

a control information receiver for receiving the control information through the CCEs selected by the processor,

wherein one CCE includes at least one Resource Element (RE) and is allocated for a common control channel.

5. The apparatus of claim 4, wherein the variable CCEs are determined according to a number of CCEs used by a base station.

6. The apparatus of claim 4, wherein the fixed CCEs are determined independently of a number of CCEs used by a base station and ACKnowledge/Not-ACKnowledge (ACK/NACK) transmission resources.