METHOD FOR FORMING RESOURCE BLOCK FOR SEARCH REGION IN DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR

• US 20150085773A1
• Filed: 04/02/2013
• Published: 03/26/2015
• Est. Priority Date: 04/02/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Kim, Myoungseob
• Granted Patent: US 9,844,044 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• 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 method for a terminal to receive an enhanced physical downlink control channel (EPDCCH) from a based station in a wireless communication system. More particularly, the method includes the steps of defining a first number of enhanced resource element groups (EREGs) for each resource block for the EPDCCH, and monitoring EPDCCH candidates consisting of one or more enhanced control channel elements (ECCEs) in resource blocks and receiving the EPDCCH, wherein each of the one or more ECCEs consists of a second number of EREGs, and indexes of the second number of EREGs are determined to be intervals of the number of ECCEs for each resource block.

Claims

1. A method for receiving an EPDCCH (Enhanced Physical Downlink Control Channel) from a base station by a user equipment (UE) in a wireless communication system, the method comprising:

defining a first number of EREGs (Enhanced Resource Element Groups) in each of resource blocks for the EPDCCH; and

receiving the EPDCCH by monitoring EPDCCH candidates comprising one or more ECCEs (Enhanced Control Channel Elements) in the resource blocks,

wherein each of the one or more ECCEs comprises a second number of EREGs,

wherein indexes of the second number of EREGs are determined as intervals of a number of ECCEs per resource block.

2. The method according to claim 1, wherein the second number of EREGs are included in same resource block.

3. The method according to claim 2, wherein the indexes of the second number of EREGs included in ECCE #n are determined by Expression A.

(n mod N_RB^ECCE)+jN_RB^ECCE 

 

<

Expression A>

(where N_RB^ECCE indicates the number of ECCEs per resource block, j=0, 1, . . . , N_ECCE^EREG−

1, and ECCE indicates the second number.)

4. The method according to claim 1, wherein the second number of EREGs are included in different resource block.

5. The method according to claim 4, wherein the indexes of the second number of EREGs included in the ECCE #n are determined by Expression B.

└

n/N_RB^Sm┘

+jN_RB^ECCE 

 

<

Expression B>

(where N_RB^ECCE indicates the number of ECCEs per resource block, j==0, 1, . . . , N_ECCE^EREG−

1, N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of resource blocks.)

6. The method according to claim 1, wherein the first number is a fixed value and the second number is a value varying according to a type of a subframe through which the EPDCCH is received.

7. The method according to claim 1, wherein the defining of the first number of EREGs comprises allocating indexes of the EREGs to each of the resource blocks,

wherein the indexes of the EREGs included in each of the resource blocks have values in the range of 0 to 15.

8. A method for transmitting, by a base station, an EPDCCH to a UE in a wireless communication system, the method comprising:

defining a first number of EREGs in each of resource blocks for the EPDCCH; and

transmitting the EPDCCH using one or more ECCEs comprising a second number of EREGs,

wherein indexes of the second number of EREGs are determined as intervals of a number of ECCEs per resource block.

9. The method according to claim 8, wherein the second number of EREGs are included in same resource block.

10. The method according to claim 9, wherein the indexes of the second number of EEGs included in ECCE #n are determined by Expression A.

(n mod N_RB^ECCE)+jN_RB^ECCE 

 

<

Expression A>

(where N_RB^ECCE indicates the number of ECCEs per resource block, j=0, 1, . . . , N_ECCE^EREG−

1, indicates the second number.)

11. The method according to claim 8, wherein the second number of EREGs are included in different resource block.

12. The method according to claim 11, wherein the indexes of the second number of EREGs included in the ECCE #n are determined by Expression B.

└

n/N_RB^Sm┘

+jN_RB^ECCE 

 

<

Expression B>

(where N_RB^ECCE indicates the number of ECCEs per resource block, j=0, 1, . . . , N_ECCE−

1, N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of resource blocks.)

13. The method according to claim 8, wherein the first number is a fixed value and the second number is a value varying according to a type of a subframe through which the EPDCCH is transmitted.

14. The method according to claim 8, wherein the defining of the first number of EREGs comprises allocating indexes of the EREGs to each of the resource blocks,

wherein the indexes of the EREGs included in each of the resource blocks have values in the range of 0 to 15.