Blind detection mode determination method, blind detection method and device

• US 9,504,028 B2
• Filed: 07/04/2013
• Issued: 11/22/2016
• Est. Priority Date: 07/12/2012
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Pan, Xueming, Zhao, Rui, Tamrakar, Rakesh
• Primary Examiner(s): DUONG, DUC T
• Application Number:
  US14/413,671
• Publication Number:
  US 20150189628A1
• Time in Patent Office: 1,237 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed are a blind detection mode determination method, blind detection method and device, the blind detection mode determination method comprising: a base station determines the E-PDCCH blind detection mode of a terminal in a subframe according to system configuration information and the blind detection capability of the terminal, and informs the terminal of the determined E-PDCCH blind detection mode of the terminal in the subframe. The blind detection method comprises: a terminal determines the E-PDCCH blind detection mode in a subframe, and conducts E-PDCCH blind detection in the subframe according to the determined E-PDCCH blind detection mode. The E-PDCCH blind detection mode of a UE in a subframe is determined according to the resource occupied in a subframe by the system configuration information, enabling the UE to conduct E-PDCCH blind detection in the subframe according to the determined E-PDCCH blind detection mode, thus avoiding unnecessary energy overhead.

Claims

1. A method of determining a blind detection mode comprising:

an evolved Node B, eNB, determining a blind Enhanced Physical Downlink Control Channel, E-PDCCH, detection mode of a User Equipment, UE, in a sub-frame according to system configuration information, and a blind detection capability of the UE; and

the eNB notifying the UE of the determined blind E-PDCCH detection mode of the UE in the sub-frame;

wherein the eNB determining the blind E-PDCCH detection mode of the UE in the sub-frame according to the system configuration information, and the blind detection capability of the UE comprises;

the eNB determining a set of Enhanced-Control Channel Element, E-CCE, aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability of the UE; and

the eNB determining a number of times, that blind detection is performed, corresponding to each E-CCE aggregation level in the set of E-CCE aggregation levels.

2. The method of claim 1, wherein the eNB determining the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability of the UE comprises:

the eNB determining the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to results of comparing numbers of Resource Elements, REs, which can be provided at the respective E-CCE aggregation levels for transmission of E-PDCCHs with a preset threshold of a number of REs, and the blind detection capability of the UE.

3. The method of claim 1, wherein the eNB notifying the UE of the determined blind E-PDCCH detection mode of the UE in the sub-frame comprises:

the eNB notifying the UE of a blind E-PDCCH detection mode in each sub-frame in a predetermined period of time.

4. The method of claim 3, wherein the eNB notifying the UE of a blind E-PDCCH detection mode in each sub-frame in the predetermined period of time comprises:

the eNB grouping sub-frames in the predetermined period of time under a predetermined rule, wherein the UE performs a same blind E-PDCCH detection mode in each group of sub-frames; and

the eNB notifying the UE of the blind E-PDCCH detection mode in each group of sub-frames.

5. The method of claim 4, wherein the eNB grouping the sub-frames in the predetermined period of time under the predetermined rule comprises:

the eNB grouping the sub-frames in the predetermined period of time into a group of normal sub-framers and another group of Downlink Pilot Time Slots, DwPTSs, under the predetermined rule.

6. A method of blind detection comprising:

a User Equipment, UE, determining a blind Enhanced Physical Downlink Control Channel, E-PDCCH, detection mode in a sub-frame, wherein the blind E-PDCCH detection mode is determined according to system configuration information, and a blind detection capability of the UE; and

the UE performing blind E-PDCCH detection in the sub-frame in the determined blind E-PDCCH detection mode;

wherein the UE determining the blind E-PDCCH detection mode in the sub-frame comprises;

the UE determining the blind E-PDCCH detection mode in the sub-frame according to the system configuration information, and the blind detection capability;

or

the UE determining the blind E-PDCCH detection mode in the sub-frame according to a notification from an evolved Node B, eNB;

wherein the UE determining the blind E-PDCCH detection mode in the sub-frame according to the system configuration information, and the blind detection capability comprises;

the UE determining a set of Enhanced-Control Channel Element, E-CCE, aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability; and

the UE determining a number of times, that blind detection is performed, corresponding to each E-CCE aggregation level in the set of E-CCE aggregation levels.

7. The method of claim 6, wherein the UE determining the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability comprises:

the UE determining the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to results of comparing numbers of Resource Elements, REs, which can be provided at the respective E-CCE aggregation levels for transmission of E-PDCCHs with a preset threshold of a number of REs, and the blind detection capability of the UE.

8. The method of claim 6, wherein the UE determining the blind E-PDCCH detection mode in the sub-frame according to the notification from the eNB comprises:

the UE determining a blind E-PDCCH detection mode in each sub-frame in a predetermined period of time according to the notification from the eNB.

9. The method of claim 8, wherein the UE determining a blind E-PDCCH detection mode in each sub-frame in the predetermined period of time according to the notification from the eNB comprises:

the UE grouping sub-frames in the predetermined period of time into a group of normal sub-framers and another group of Downlink Pilot Time Slots, DwPTSs under a predetermined rule; and

the UE determining a blind E-PDCCH detection mode in each group of sub-frames according to the notification from the eNB.

10. An evolved Node B, eNB, comprising:

a blind detection mode determining module configured to determine a blind Enhanced Physical Downlink Control Channel, E-PDCCH, detection mode of a User Equipment, UE, in a sub-frame according to system configuration information, and a blind detection capability of the UE; and

a blind detection mode notifying module configured to notify the UE of the determined blind E-PDCCH detection mode of the UE in the sub-frame;

wherein the blind detection mode determining module comprises;

a set of aggregation levels for blind detection determining sub-module configured to determine a set of Enhanced-Control Channel Element, E-CCE, aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability of the UE; and

a number of times for blind detection determining sub-module configured to determine a number of times, that blind detection is performed, corresponding to each E-CCE aggregation level in the set of E-CCE aggregation levels.

11. The eNB of claim 10, wherein the set of aggregation levels for blind detection determining sub-module is configured:

to determine the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to results of comparing numbers of Resource Elements, REs, which can be provided at the respective E-CCE aggregation levels for transmission of E-PDCCHs with a preset threshold of a number of REs, and the blind detection capability of the UE.

12. A User Equipment, UE, comprising:

a blind detection mode determining module configured to determine a blind Enhanced Physical Downlink Control Channel, E-PDCCH, detection mode in a sub-frame, wherein the blind E-PDCCH detection mode is determined according to system configuration information, and a blind detection capability of the UE; and

a blind detection performing module configured to perform blind E-PDCCH detection in the sub-frame in the determined blind E-PDCCH detection mode;

wherein the blind detection mode determining module is configured;

to determine the blind E-PDCCH detection mode in the sub-frame according to the system configuration information, and the blind detection capability;

or

to determine the blind E-PDCCH detection mode in the sub-frame according to a notification from an evolved Node B, eNB;

wherein the blind detection mode determining module configured to determine the blind E-PDCCH detection mode in the sub-frame according to the system configuration information, and the blind detection capability, comprises;

a set of aggregation levels for blind detection determining sub-module configured to determine a set of Enhanced-Control Channel Element, E-CCE, aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to the system configuration information, and the blind detection capability; and

a number of times for blind detection determining sub-module configured to determine a number of times, that blind detection is performed, corresponding to each E-CCE aggregation level in the set of E-CCE aggregation levels.

13. The UE of claim 12, wherein the set of aggregation levels for blind detection determining sub-module is configured:

to determine the set of E-CCE aggregation levels, at which the UE needs to perform blind E-PDCCH detection in the sub-frame, according to results of comparing numbers of Resource Elements, REs, which can be provided at the respective E-CCE aggregation levels for transmission of E-PDCCHs with a preset threshold of a number of REs, and the blind detection capability of the UE.

14. The UE of claim 12, wherein the blind detection mode determining module configured to determine the blind E-PDCCH detection mode in the sub-frame according to the notification from the eNB is configured:

to determine a blind E-PDCCH detection mode in each sub-frame in a predetermined period of time according to the notification from the eNB.