METHOD AND DEVICE FOR DETECTING AND TRANSMITTING INFORMATION

• US 20140146775A1
• Filed: 01/29/2014
• Published: 05/29/2014
• Est. Priority Date: 08/08/2011
• 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: GUAN, Lei, CHENG, Yan
• Granted Patent: US 10,200,173 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 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

Embodiments of the present invention disclose a method and a device for detecting and transmitting information. The method includes: obtaining, by a UE, at least one type of configuration information of an antenna port occupied by a D-PDCCH, which is configured on a base station side; determining, by the UE, a search space of the D-PDCCH; and detecting, by the UE, the D-PDCCH in the search space according to the antenna port configuration information. With the embodiments of the present invention, the UE can detect the D-PDCCH, and therefore data transmission is ensured. Furthermore, a blind detection of a PDCCH by the UE based on time-frequency resources in an existing system is extended to a spatial dimension, that is, an antenna port, thereby increasing the efficiency of resource utilization, so that the D-PDCCH can be detected in the spatial dimension.

Claims

1. A method for detecting information, comprising:

obtaining, by a user equipment (UE), at least one type of configuration information of an antenna port occupied by a D-physical downlink control channel (D-PDCCH), which is configured on a base station side;

determining, by the UE, a search space of the D-PDCCH; and

detecting, by the UE, the D-PDCCH in the search space according to the antenna port configuration information.

2. The method according to claim 1, further comprising:

obtaining, by the UE, a mapping relationship between the antenna port configuration information and second information, wherein

the detecting the D-PDCCH in the search space comprises;

detecting, by the UE, the D-PDCCH in the search space according to the antenna port configuration information and the mapping relationship;

the mapping relationship between the antenna port configuration information and second information comprises any one or any combination of the following mapping relationships;

a mapping relationship between the antenna port configuration information and a downlink control information (DCI) format used by the D-PDCCH;

a mapping relationship between the antenna port configuration information and an aggregation level of the D-PDCCH;

a mapping relationship between the antenna port configuration information and resources occupied by the D-PDCCH; and

a mapping relationship between the antenna port configuration information and scheduling information of each carrier borne in the D-PDCCH.

3. The method according to claim 2, wherein:

the configured antenna port configuration information comprises one type, and the mapping relationship is a one-to-one or one-to-many mapping relationship;

or

the configured antenna port configuration information comprises at least two types, and the mapping relationship is a many-to-one or many-to-many mapping relationship.

4. The method according to claim 1, wherein the antenna port configuration information comprises antenna port information, and scrambling code ID information and codeword information of a UE-specific reference signal corresponding to an antenna port.

5. The method according to claim 4, wherein the antenna port configuration information further comprises one or any combination of the following:

a length of an orthogonal spreading code of the UE-specific reference signal corresponding to an antenna port, and a mapping relationship between antenna port information and codeword information.

6. The method according to claim 1, wherein the antenna port configuration information and the mapping relationship are obtained through broadcast signaling, RRC dedicated signaling, or MAC layer signaling, or physical layer signaling.

7. The method according to claim 1, further comprising:

obtaining, by the UE, an aggregation level corresponding to the D-PDCCH and a count of detections of a candidate D-PDCCH corresponding to the aggregation level, wherein

the detecting the D-PDCCH in the search space comprises;

detecting the D-PDCCH in the search space according to the obtained aggregation level corresponding to the D-PDCCH and the count of detections of the candidate D-PDCCH corresponding to the aggregation level.

8. A method for transmitting information, wherein the method is applicable to a base station and comprises:

configuring, by a base station, at least one type of configuration information of an antenna port occupied by a D-PDCCH for a UE;

determining, by the base station, search space information of the D-PDCCH; and

transmitting, by the base station, the D-PDCCH in the search space to the UE according to the at least one type of configuration information of an antenna port occupied by the D-PDCCH which is configured for the UE.

9. The method according to claim 8, wherein:

the base station further obtains a mapping relationship between the antenna port configuration information and second information, and configures the obtained mapping relationship for the UE; and

the mapping relationship between the antenna port configuration information and second information comprises any one or any combination of the following mapping relationships;

a mapping relationship between the antenna port configuration information and a DCI format used by the D-PDCCH;

a mapping relationship between the antenna port configuration information and an aggregation level of the D-PDCCH;

a mapping relationship between the antenna port configuration information and resources occupied by the D-PDCCH; and

a mapping relationship between the antenna port configuration information and scheduling information of each carrier borne in the D-PDCCH.

10. The method according to claim 9, wherein:

the antenna port configuration information comprises one type, and the mapping relationship is a one-to-one or one-to-many mapping relationship;

or

the antenna port configuration information comprises at least two types, and the mapping relationship is a many-to-one or many-to-many mapping relationship.

11. The method according to claim 8, further comprising:

configuring, by the base station, an aggregation level corresponding to the D-PDCCH and a count of detections of a candidate D-PDCCH corresponding to the aggregation level for the UE, so that the UE detects the D-PDCCH in the search space according to the obtained aggregation level corresponding to the D-PDCCH and the count of detections of the candidate D-PDCCH corresponding to the aggregation level.

12. A user equipment, comprising:

an obtaining unit, adapted to obtain at least one type of antenna port configuration information occupied by a D-PDCCH, which is configured on a base station side;

a determining unit, adapted to determine a search space of the D-PDCCH; and

a detecting unit, adapted to detect the D-PDCCH in the search space according to the antenna port configuration information.

13. The user equipment according to claim 12, wherein:

the obtaining unit is further adapted to obtain a mapping relationship between the antenna port configuration information and second information;

the detecting unit is adapted to detect the D-PDCCH in the search space according to the antenna port configuration information and the mapping relationship; and

the mapping relationship between the antenna port configuration information and second information comprises any one or any combination of the following mapping relationships;

a mapping relationship between the antenna port configuration information and a DCI format used by the D-PDCCH;

a mapping relationship between the antenna port configuration information and an aggregation level of the D-PDCCH;

a mapping relationship between the antenna port configuration information and resources occupied by the D-PDCCH; and

a mapping relationship between the antenna port configuration information and scheduling information of each carrier borne in the D-PDCCH.

14. The user equipment according to claim 13, wherein:

the antenna port configuration information obtained by the obtaining unit comprises one type, and the obtained mapping relationship is a one-to-one or one-to-many mapping relationship;

or

the antenna port configuration information obtained by the obtaining unit comprises at least two types, and the obtained mapping relationship is a many-to-one or many-to-many mapping relationship;

15. The user equipment according to claim 12, wherein:

the antenna port configuration information obtained by the obtaining unit comprises antenna port information, and scrambling code ID information and codeword information of a UE-specific reference signal corresponding to each antenna port.

16. The user equipment according to claim 15, wherein:

the antenna port configuration information obtained by the obtaining unit further comprises one or any combination of the following;

a length of an orthogonal spreading code of the UE-specific reference signal corresponding to each antenna port, and a mapping relationship between antenna port information and codeword information.

17. The user equipment according to claim 16, wherein:

the obtaining unit is further adapted to obtain an aggregation level corresponding to the D-PDCCH and the count of detections of a candidate D-PDCCH corresponding to the aggregation level; and

the detecting unit is further adapted to detect the D-PDCCH in the search space according to the obtained aggregation level corresponding to the D-PDCCH and the count of detections of the candidate D-PDCCH corresponding to the aggregation level.

18. A base station, comprising:

a configuring unit, adapted to configure at least one type of configuration information of an antenna port occupied by a D-PDCCH for a UE;

a search space determining unit, adapted to determine search space information of the D-PDCCH; and

a transmitting unit, adapted to transmit the D-PDCCH in the search space to the UE according to the at least one type of configuration information of an antenna port occupied by the D-PDCCH which is configured for the UE.

19. The base station according to claim 18, further comprising:

an obtaining unit, adapted to obtain a mapping relationship between the antenna port configuration information and second information;

wherein

the transmitting unit is further adapted to configure the obtained mapping relationship for the UE; and

the mapping relationship between the antenna port configuration information and second information comprises any one or any combination of the following mapping relationships;

a mapping relationship between the antenna port configuration information and a DCI format used by the D-PDCCH;

a mapping relationship between the antenna port configuration information and an aggregation level of the D-PDCCH;

a mapping relationship between the antenna port configuration information and resources occupied by the D-PDCCH; and

a mapping relationship between the antenna port configuration information and scheduling information of each carrier borne in the D-PDCCH.

20. The base station according to claim 19, wherein:

the antenna port configuration information configured by the configuring unit comprises one type, and the mapping relationship obtained by the obtaining unit is a one-to-one or one-to-many mapping relationship;

or

the antenna port configuration information configured by the configuring unit comprises at least two types, and the mapping relationship obtained by the obtaining unit is a many-to-one or many-to-many mapping relationship.

21. The base station according to claim 18, wherein the configuring unit is further adapted to configure an aggregation level corresponding to the D-PDCCH and a count of detections of a candidate D-PDCCH corresponding to the aggregation level for the UE, so that the UE detects the D-PDCCH in the search space according to the obtained aggregation level corresponding to the D-PDCCH and the count of detections of the candidate D-PDCCH corresponding to the aggregation level.