METHOD FOR SETTING UP CARRIER IN CARRIER AGGREGATION SYSTEM AND APPARATUS REQUIRED FOR SAME

• US 20120033647A1
• Filed: 01/19/2010
• Published: 02/09/2012
• Est. Priority Date: 01/19/2009
• Status: Active Grant

• Current Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Original Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Inventors: Moon, Sung Ho, Kim, So Yeon, Cho, Han Gyu, Chung, Jae Hoon, Han, Seung Hee, Kwon, Yeong Hyeon
• Granted Patent: US 9,185,728 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04L 23/02 adapted for orthogonal signalling
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

The present invention relates to a wireless communication system. Specifically, the invention relates to a method for configuring a component carrier at a base station in a wireless communication system, comprising the steps of determining whether initial access is permitted to a user equipment with respect to a downlink component carrier; and transmitting a synchronization channel signal and a broadcast channel signal to at least one user equipment via the downlink component carrier, wherein the initial access permission is applied to said at least one user equipment by modifying at least one of the synchronization channel signal and the broadcast channel signal.

Claims

1. A method for configuring a component carrier at a base station in a wireless communication system supporting carrier aggregation, the method comprising:

determining whether initial access is permitted to a user equipment with respect to a downlink component carrier; and

transmitting a synchronization channel signal and a broadcast channel signal to at least one user equipment via the downlink component carrier,

wherein the initial access permission is applied to said at least one user equipment by modifying at least one of the synchronization channel signal and the broadcast channel signal.

2. The method of claim 1, wherein the initial access permission is determined considering a type of the user equipment.

3. The method of claim 1, wherein the initial access permission is applied by modifying at least one of radio resources allocated to the synchronization channel signal and the broadcast channel signal.

4. The method of claim 1, wherein the initial access permission is applied by changing a time order a primary synchronization channel (P-SCH) signal and a time order of a secondary synchronization channel (S-SCH) signal each other.

5. The method of claim 1, wherein the initial access permission is applied by scrambling segment 1 on the basis of segment 2 in the secondary synchronization channel signal into which the segment 1 and the segment 2 are mapped.

6. The method of claim 1, wherein the initial access permission is applied by modifying a phase of a signal transmitted through the synchronization channel.

7. The method of claim 1, wherein the initial access permission is applied by modifying a location in a time domain of the broadcast channel signal.

8. The method of claim 1, wherein the initial access permission is applied by varying scrambling applied to a message of the broadcast channel signal.

9. The method of claim 1, wherein the initial access permission is applied by varying a CRC mask applied to cyclic redundancy check (CRC) of the broadcast channel signal.

10. A method for configuring a component carrier at a base station in a wireless communication system supporting carrier aggregation, the method comprising:

determining whether initial access is permitted to a user equipment with respect to a downlink component carrier; and

transmitting a synchronization channel signal and a broadcast channel signal to at least one user equipment via the downlink component carrier,

wherein the initial access permission is indicated by using information included in RRC message transmitted through the broadcast channel.

11. The method of claim 10, wherein the initial access permission is indicated by using a field value set up in master block information.

12. The method of claim 10, wherein the initial access permission is indicated by using a list of component carriers to which initial access is restricted.

13. A base station configured to perform a method for configuring a component carrier applied to at least one user equipment, the base station comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal to and from the user equipment;

a memory for storing information transmitted to and received from the user equipment and a parameter required for an operation of the base station; and

a processor connected with the RF unit and the memory and configured to control the RF unit and the memory for the operation of the base station,

wherein the processor determines whether initial access is permitted to the user equipment with respect to a downlink component carrier, and transmits a synchronization channel signal and a broadcast channel signal to at least one user equipment via the downlink component carrier, wherein the initial access permission is applied to the user equipment by modifying at least one of the synchronization channel signal and the broadcast channel signal.