METHOD AND APPARATUS FOR RECEIVING A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM

• US 20080232322A1
• Filed: 03/20/2008
• Published: 09/25/2008
• 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, Han, Jin-Kyu, Cho, Joon-Young, Lee, Ju-Ho, Zhang, Yujian
• Granted Patent: US 8,948,092 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• 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:

receiving information indicating variable Control Channel Elements (CCEs) allocated for first UEs among CCEs included in control channels used in the mobile communication system;

receiving information indicating fixed CCEs allocated for second UEs;

selecting the variable CCEs when the UE is included in the first UEs;

selecting the fixed CCEs when the UE is included in the second UEs; and

receiving the control information over a control channel including the selected CCEs.

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

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

4. The method of claim 1, wherein the second UEs operate in a Discontinuous Reception (DRx) mode.

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

a controller for acquiring information indicating variable Control Channel Elements (CCEs) allocated for first User Equipments (UEs) among CCEs constituting control channels, and information indicating fixed CCEs allocated for second UEs, selecting the variable CCEs when a UE receiving the control information is included in the first UEs, and selecting the fixed CCEs when the UE receiving the control information is included in the second UEs; and

a control information receiver for receiving the control information through the CCEs selected by the controller.

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

7. The apparatus of claim 5, wherein the fixed CCEs are determined independently of a number Ncce of CCEs used by a base station and ACKnowledge/Not-ACKnowledge (ACK/NACK) transmission resources.

8. The apparatus of claim 5, wherein the second UEs operate in a Discontinuous Reception (DRx) mode.

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

determining whether the UE should receive shared data or non-shared data in an entire cell;

selecting first subset information allocated for UEs receiving the shared data from among Control Channel Elements (CCEs) constituting control channels, when the UE should receive the shared data;

selecting second subset information allocated for UEs receiving the non-shared data from among the CCEs constituting control channels, when the UE should receive the non-shared data; and

receiving the control information over a control channel corresponding to the selected first subset information or the second subset information;

wherein the first subset information is control channel establishment information allocated to a UE receiving the shared data, and the second subset information is control channel establishment information allocated to a UE receiving the non-shared data.

10. The method of claim 9, wherein one of the first subset information and the second subset information includes CCE information indicating a position of at least one CCE constituting the control channel.

11. The method of claim 9, wherein one of the first subset information and the second subset information includes Modulation and Coding rate Scheme (MCS) information indicating a number of CCEs constituting the control channel.

12. The method of claim 9, wherein a number of control channels included in the first subset information is less than a number of control channels included in the second subset information.

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

a controller for acquiring first subset information allocated for User Equipments (UEs) that should receive shared data in an entire cell from among Control Channel Elements (CCEs) constituting control channels, and for acquiring second subset information allocated for UEs that should receive non-shared data, selecting the first subset information when a UE receiving the control information should receive the shared data, and selecting second subset information when the UE receiving the control information should receive the non-shared data; and

a control information receiver for receiving the control information over a control channel corresponding to the selected subset information;

wherein the first subset information is control channel establishment information allocated to a UE receiving the shared data, and the second subset information is control channel establishment information allocated to a UE receiving the non-shared data.

14. The apparatus of claim 13, wherein one of the first subset information and the second subset information comprises CCE information indicating a position of at least one the CCEs constituting the control channel.

15. The apparatus of claim 13, wherein one of the first subset information and the second subset information comprises Modulation and Coding rate Scheme (MCS) information indicating a number of the CCEs constituting the control channel.

16. The apparatus of claim 13, wherein a number of control channels included in the first subset information is less than a number of control channels included in the second subset information.

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

receiving information indicating fixed Control Channel Elements (CCEs) allocated for first UEs that should receive shared data in an entire cell among CCEs constituting control channels used in the mobile communication system, and information indicating variable CCEs or fixed CCEs allocated for second UEs that should receive non-shared data in the entire cell;

determining if the UE should receive the shared data;

selecting the fixed CCEs allocated for the first UEs, when the UE should receive the shared data;

selecting the variable CCEs or the fixed CCEs allocated for the second UEs, when the UE should receive the non-shared data; and

receiving the control information over a control channel including the selected CCEs.

18. The method of claim 17, wherein the shared data is system information transmitted over a broadcast channel.

19. An apparatus for receiving control information by a User Equipment (UE) in a mobile communication system, the apparatus comprising:

a controller for acquiring information indicating fixed Control Channel Elements (CCEs) allocated for first UEs that should receive shared data in an entire cell among CCEs constituting control channels used in the mobile communication system, acquiring information indicating variable CCEs or fixed CCEs allocated for second UEs that should receive non-shared data in the entire cell, selecting the fixed CCEs allocated for the first UEs, when the UE should receive the shared data, and selecting the variable CCEs or the fixed CCEs allocated for the second UEs, when the UE should receive the non-shared data; and

a control information receiver for receiving the control information through the CCEs selected by the controller.

20. The apparatus of claim 19, wherein the shared data is system information transmitted over a broadcast channel.