Method for assigning number of control channel candidates and number of blind detection times, base station, and user equipment

• US 10,075,947 B2
• Filed: 07/27/2017
• Issued: 09/11/2018
• Est. Priority Date: 11/02/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Liu, Jianqin, Liu, Kunpeng, Wu, Qiang, Zhou, Yongxing, Liu, Jianghua
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): JONES, PRENELL P
• Application Number:
  US15/660,980
• Publication Number:
  US 20170325206A1
• Time in Patent Office: 411 Days
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention provides a method for assigning the number of control channel candidates and the number of blind detection times, a base station, and a user equipment. The method includes determining a first aggregation level set {L_1i} and determining the number of EPDCCH candidates corresponding to each aggregation level in the {L_1i}. {L_1i} is formed by N aggregation levels supported by an EPDCCH. A second aggregation level set {L_2j} is determined along with the number of EPDCCH candidates corresponding to each aggregation level in the {L_2j}. {L_2j} is formed by M aggregation levels supported by an EPDCCH to be detected, {L_2j} is a subset of {L_1i}, and the number of EPDCCH candidates corresponding to L_2j in {L_2j} is greater than or equal to the number of EPDCCH candidates corresponding to L_2j in {L_1i}.

Claims

1. A method for detecting control channel, the method comprising:

determining, by a user equipment (UE), a number of enhanced physical downlink control channel (EPDCCH) candidates corresponding to each aggregation level (AL) in a second AL set {L_2j}, wherein,

the set {L_2j} is formed by M ALs supported by four physical resource block (PRB) pairs,

j is a positive integer that ranges from 1 to M,

the set {L_2j} is a subset of a first AL set {L_1i}, the set {L_1i} is formed by N ALs supported by eight PRB pairs,

i is a positive integer that ranges from 1 to N, M≤

N, and

the number of EPDCCH candidates corresponding to an AL L_2j in the set {L_2j} is greater than or equal to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i}; and

detecting, by the UE, the EPDCCH according to the number of EPDCCH candidates corresponding to each AL in the set {L_2j}.

2. The method according to claim 1, wherein the ratio of the number of EPDCCH candidates corresponding to one AL L_2j in the set {L_2j} to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i} is equal to the ratio of N to M.

3. The method according to claim 1, wherein there is only one AL L_2j in the set {L_2j} satisfying that the number of EPDCCH candidates corresponding to the AL L_2j is greater than the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i}.

4. An apparatus, comprising:

a processor; and

a memory coupled to the processor, wherein the memory stores instructions to program the processor to;

determining a number of enhanced physical downlink control channel (EPDCCH) candidates corresponding to each aggregation level (AL) in a second AL set {L_2j}, wherein,

the set {L_2j} is formed by M ALs supported by four physical resource block (PRB) pairs,

j is a positive integer that ranges from 1 to M,

the set {L_2j} is a subset of a first AL set {L_1i},

the set {L_1i} is formed by N ALs supported by eight PRB pairs,

i is a positive integer that ranges from 1 to N, M≤

N, and

the number of EPDCCH candidates corresponding to an AL L_2j in the set {L_2j} is greater than or equal to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i}; and

detecting the EPDCCH according to the number of EPDCCH candidates corresponding to each AL in the set {L_2j}.

5. The apparatus according to claim 4, wherein the ratio of the number of EPDCCH candidates corresponding to one AL L_2j in the set {L_2j} to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i} is equal to the ratio of N to M.

6. The apparatus according to claim 4, wherein there is only one AL L_2j in the set {L_2j} satisfying that the number of EPDCCH candidates corresponding to the AL L_2j is greater than the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i}.

7. A non-transitory computer-readable storage medium having a program recorded thereon;

wherein the program makes a computer;

determine a number of enhanced physical downlink control channel (EPDCCH) candidates corresponding to each aggregation level (AL) in a second AL set {L_2j}, wherein, the set {L_2j} is formed by M ALs supported by four physical resource block (PRB) pairs, j is a positive integer that ranges from 1 to M, the set {L_2j} is a subset of a first AL set {L_1i}, the set {L_1i} is formed by N ALs supported by eight PRB pairs, i is a positive integer that ranges from 1 to N, M≤

N, and the number of EPDCCH candidates corresponding to an AL L_2j in the set {L_2j} is greater than or equal to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i};

detect the EPDCCH according to the number of EPDCCH candidates corresponding to each AL in the set {L_2j}.

8. The non-transitory computer-readable storage medium according to claim 7, wherein the ratio of the number of EPDCCH candidates corresponding to one AL L_2j in the set {L_2j} to the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i} is equal to the ratio of N to M.

9. The non-transitory computer-readable storage medium according to claim 7, wherein there is only one AL L_2j in the set {L_2j} satisfying that the number of EPDCCH candidates corresponding to the AL L_2j is greater than the number of EPDCCH candidates corresponding to the AL L_2j in the set {L_1i}.