Method for forming resource block for search region in downlink control channel in wireless communication system, and apparatus therefor

• US 10,462,775 B2
• Filed: 10/23/2017
• Issued: 10/29/2019
• 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
• Primary Examiner(s): Cunningham, Kevin M
• Application Number:
  US15/790,960
• Publication Number:
  US 20180049170A1
• Time in Patent Office: 736 Days
• 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 Enhanced Physical Downlink Control Channel (EPDCCH) from a base station by a user equipment (UE) in a wireless communication system, the method comprising:

receiving the EPDCCH by monitoring EPDCCH candidates comprising one or more Enhanced Control Channel Elements (ECCEs) in physical resource block (PRB) pairs for the EPDCCH,

wherein a first number of Enhanced Resource Element Groups (EREGs) are defined in each of the PRB pairs,

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

wherein, if the second number of EREGs are included in same PRB pair, the indexes of the second number of EREGs included in ECCE #n are determined by (n mod N_RB^ECCE)+jN_RB^ECCE,

wherein, if the second number of EREGs are not included in the same PRB pair, the indexes of the second number of EREGs included in the ECCE #n are determined by └

n/N_RB^Sm┘

+jN_RB^ECCE, and

wherein N_RB^ECCE indicates the number of ECCEs per PRB pair, j=0, 1, . . . , N_ECCE^EREG−

1, and N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of PRB pairs.

2. The method according to claim 1, wherein the first number of EREGs included in each of the PRB pairs have values are indexed from 0 to 15.

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

4. A method for transmitting an Enhanced Physical Downlink Control Channel (EPDCCH) to a UE by a base station in a wireless communication system, the method comprising:

transmitting the EPDCCH in physical resource block (PRB) pairs for the EPDCCH to a user equipment (UE),

wherein the EPDCCH comprises one or more Enhanced Control Channel Elements (ECCEs),

wherein a first number of Enhanced Resource Element Groups (EREGs) are defined in each of the PRB pairs,

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

wherein, if the second number of EREGs are included in same PRB pair, the indexes of the second number of EREGs included in ECCE #n are determined by (n mod N_RB^ECCE)+jN_RB^ECCE,

wherein, if the second number of EREGs are not included in the same PRB pair, the indexes of the second number of EREGs included in the ECCE #n are determined by └

n/N_RB^Sm┘

+jN_RB^ECCE, and

wherein N_RB^ECCE indicates the number of ECCEs per PRB pair, j=0, 1, . . . , N_ECCE^EREG−

1, and N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of PRB pairs.

5. The method according to claim 4, wherein the first number of EREGs included in each of the PRB pairs have values are indexed from 0 to 15.

6. The method according to claim 4, wherein the first number is a fixed value and the second number is determined according to a type of a subframe through which the EPDCCH is transmitted.

7. A user equipment (UE) in a wireless communication system, the UE comprising:

a radio frequency (RF) unit;

a processor connected with the RF unit and configured to receive an Enhanced Physical Downlink Control Channel (EPDCCH) from a base station by monitoring EPDCCH candidates comprising one or more Enhanced Control Channel Elements (ECCEs) in physical resource block (PRB) pairs for the EPDCCH,

wherein a first number of Enhanced Resource Element Groups (EREGs) are defined in each of the PRB pairs,

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

wherein, if the second number of EREGs are included in same PRB pair, the indexes of) the second number of EREGs included in ECCE #n are determined by (n mod N_RB^ECCE)+jN_RB^ECCE,

wherein, if the second number of EREGs are not included in the same PRB pair, the indexes of the second number of EREGs included in the ECCE #n are determined by └

n/N_RB^Sm┘

+jN_RB^ECCE, and

wherein N_RB^ECCE indicates the number of ECCEs per PRB pair, j=0, 1, . . . , N_ECCE^EREG−

1, and N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of PRB pairs.

8. The UE according to claim 7, wherein the first number of EREGs included in each of the PRB pairs have values are indexed from 0 to 15.

9. The UE according to claim 7, wherein the first number is a fixed value and the second number is determined according to a type of a subframe through which the EPDCCH is received.

10. A base station (BS) in a wireless communication system, the BS comprising:

a radio frequency (RF) unit;

a processor connected with the RF unit and configured to transmit an Enhanced Physical Downlink Control Channel (EPDCCH) in physical resource block (PRB) pairs for the EPDCCH to a user equipment (UE),

wherein the EPDCCH comprises one or more Enhanced Control Channel Elements (ECCEs),

wherein a first number of Enhanced Resource Element Groups (EREGs) are defined in each of the PRB pairs,

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

wherein, if the second number of EREGs are included in same PRB pair, the indexes of the second number of EREGs included in ECCE #n are determined by (n mod N_RB^ECCE)+jN_RB^ECCE,

wherein, if the second number of EREGs are not included in the same PRB pair, the indexes of the second number of EREGs included in the ECCE #n are determined by └

n/N_RB^Sm┘

+jN_RB^ECCE, and

wherein N_RB^ECCE indicates the number of ECCEs per PRB pair, j=0, 1, . . . , N_ECCE^EREG−

1, and N_ECCE^EREG indicates the second number, and N_RB^Sm indicates a number of PRB pairs.

11. The BS according to claim 10, wherein the first number of EREGs included in each of the PRB pairs have values are indexed from 0 to 15.

12. The BS according to claim 10, wherein the first number is a fixed value and the second number is determined according to a type of a subframe through which the EPDCCH is transmitted.