Method for processing enhanced physical downlink control channel, network-side device, and user equipment

• US 9,867,176 B2
• Filed: 04/28/2015
• Issued: 01/09/2018
• Est. Priority Date: 10/30/2012
• 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: Li, Zhongfeng, Tang, Zhenfei, Lu, Jianmin, Wang, Ke
• Primary Examiner(s): Masur, Paul H
• Assistant Examiner(s): Phillips, Michael
• Application Number:
  US14/698,447
• Publication Number:
  US 20150230220A1
• Time in Patent Office: 987 Days
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a method for processing an enhanced physical downlink control channel (EPDCCH), a network-side device, and a user equipment. The method includes: notifying a user equipment (UE) of M physical resource block (PRB) sets used for EPDCCH transmission and N reference signal (RS) configurations used for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping, and notifying the UE of correspondence between the M PRB sets and the N RS configurations, where N is a positive integer greater than 1, and M is a positive integer; and performing the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the correspondence between the M PRB sets and the N RS configurations.

Claims

1. A method for processing an enhanced physical downlink control channel (EPDCCH), the method comprising:

notifying a user equipment (UE) of M physical resource block (PRB) sets used for EPDCCH transmission and N reference signal (RS) configurations used for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping, and notifying the UE of correspondence between the M PRB sets and the N RS configurations, wherein N is a positive integer greater than 1, and M is a positive integer; and

performing the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the correspondence between the M PRB sets and the N RS configurations,

wherein notifying the UE of the correspondence between the M PRB sets and the N RS configurations comprises;

when each PRB set of the M PRB sets comprises a PRB set index, and each RS configuration of the N RS configurations comprises an RS configuration index, sending to the UE, second indication signaling that indicates the correspondence between the M PRB sets and the N RS configurations, wherein the second indication signaling comprises the PRB set index of each PRB set of the M PRB sets and the RS configuration index corresponding to the PRB set index of each PRB set of the M PRB sets.

2. The method according to claim 1, wherein performing the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the correspondence between the M PRB sets and the N RS configurations comprises:

determining at least one RS configuration of the N RS configurations; and

performing the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the at least one RS configuration and a PRB set corresponding to the at least one RS configuration.

3. The method according to claim 1 wherein the correspondence between the M PRB sets and the N RS configurations comprises that the M PRB sets correspond to the N RS configurations in a one-to-one manner.

4. The method according to claim 1, wherein each RS configuration of the N RS configurations further comprises one or more of the following:

a cell identifier, a cell specific reference signal (CRS) configuration, a non-zero power channel state information reference signal (NZP CSI-RS) configuration, a zero power (ZP) CSI-RS configuration, an EPDCCH start time, a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration, and a carrier frequency index.

5. The method according to claim 1,

wherein the second indication signaling comprises a RS configuration information element that indicates the PRB set index of each PRB set of the M PRB sets and the RS configuration index corresponding to the PRB set index of each PRB set of the M PRB sets.

6. A method for processing an enhanced physical downlink control channel (EPDCCH), the method comprising:

acquiring, from a network-side device, M physical resource block (PRB) sets used for EPDCCH transmission, N reference signal (RS) configurations used for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping, and correspondence between the M PRB sets and the N RS configurations, wherein N is a positive integer greater than 1, and M is a positive integer; and

performing EPDCCH detection on the M PRB sets respectively according to each PRB set of the M PRB sets and an RS configuration corresponding to each PRB set,

wherein acquiring the correspondence between the M PRB sets and the N RS configurations comprises;

when each PRB set of the M PRB sets comprises a PRB set index, and each RS configuration of the N RS configurations comprises an RS configuration index, acquiring second indication signaling that indicates the correspondence between the M PRB sets and the N RS configurations, wherein the second indication signaling comprises the PRB set index of each PRB set of the M PRB sets and the RS configuration index corresponding to the PRB set index of each PRB set of the M PRB sets.

7. The method according to claim 6, wherein before performing EPDCCH detection on the M PRB sets respectively according to each PRB set of the M PRB sets and the RS configuration corresponding to each PRB set, the method further comprises:

performing quasi colocation (QCL) hypothesis on each PRB set of the M PRB sets.

8. The method according to claim 6, wherein the correspondence between the M PRB sets and the N RS configurations comprises that the M PRB sets correspond to the N RS configurations in a one-to-one manner.

9. The method according to claim 7, wherein performing QCL hypothesis on each PRB set of the M PRB sets comprises:

performing the QCL hypothesis according to the RS configuration corresponding to each PRB set of the M PRB sets.

10. The method according to claim 6, wherein each RS configuration of the N RS configurations further comprises one or more of the following:

a cell identifier, a cell specific reference signal (CRS) configuration, a non-zero power channel state information reference signal (NZP CSIRS) configuration, a zero power (ZP) CSI-RS configuration, an EPDCCH start time, a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration, and a carrier index.

11. A network-side device, comprising:

a transmitter configured to notify a user equipment (UE) of M physical resource block (PRB) sets used for enhanced physical downlink control channel (EPDCCH) transmission and N reference signal (RS) configurations used for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping, and notify the UE of correspondence between the M PRB sets and the N RS configurations, wherein N is a positive integer greater than 1, and M is a positive integer; and

at least one processor configured to perform the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the correspondence between the M PRB sets and the N RS configurations,

wherein when each PRB set of the M PRB sets comprises a PRB set index, and each RS configuration of the N RS configurations comprises an RS configuration index, the transmitter is configured to send to the UE, second indication signaling that indicates the correspondence between the M PRB sets and the N RS configurations, wherein the second indication signaling comprises an index identifier of the M PRB sets and index identifiers of the N RS configurations corresponding to the index identifier of the M PRB sets.

12. The network-side device according to claim 11, wherein the at least one processor is further configured to:

determine at least one RS configuration of the N RS configurations, and

perform the EPDCCH DCI rate matching and/or the EPDCCH resource mapping according to the at least one RS configuration and a PRB set corresponding to the at least one RS configuration.

13. The network-side device according to claim 11, wherein the correspondence between the M PRB sets and the N RS configurations comprises that the M PRB sets correspond to the N RS configurations in a one-to-one manner.

14. The network-side device according to claim 11, wherein each RS configuration of the N RS configurations further comprises one or more of the following:

a cell identifier, a cell specific reference signal (CRS) configuration, a non-zero power channel state information reference signal (NZP C SIRS) configuration, a zero-power (ZP) CSI-RS configuration, an EPDCCH start time, a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration, and a carrier frequency index.

15. The network-side device according to claim 11,

wherein the second indication signaling comprises a RS configuration information element that indicates the index identifier of the M PRB sets and index identifiers of the N RS configurations corresponding to the index identifier of the M PRB sets.

16. A user equipment, comprising:

a receiver configured to acquire, from a network-side device, M physical resource block (PRB) sets used for enhanced physical downlink control channel (EPDCCH) transmission, N reference signal (RS) configurations used for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping, and correspondence between the M PRB sets and the N RS configurations, wherein N is a positive integer greater than 1, and M is a positive integer; and

at least one processor configured to perform EPDCCH detection on the M PRB sets respectively according to each PRB set of the M PRB sets and an RS configuration corresponding to each PRB set,

wherein when each PRB set of the M PRB sets comprises a PRB set index, and each RS configuration of the N RS configurations comprises an RS configuration index, the receiver is configured to acquire second indication signaling that indicates the correspondence between the M PRB sets and the N RS configurations, wherein the second indication signaling comprises the PRB set index of each PRB set of the M PRB sets and the RS configuration index corresponding to the PRB set index of each PRB set of the M PRB sets.

17. The user equipment according to claim 16, wherein the at least one processor is further configured to perform quasi colocation (QCL) hypothesis on each PRB set of the M PRB sets.

18. The user equipment according to claim 16, wherein the correspondence between the M PRB sets and the N RS configurations comprises that the M PRB sets correspond to the N RS configurations in a one-to-one manner.

19. The user equipment according to claim 17, wherein the at least one processor is configured to perform QCL hypothesis according to the RS configuration corresponding to each PRB set of the M PRB sets.

20. The user equipment according to claim 16, wherein each RS configuration of the N RS configurations further comprises one or more of the following:

a cell identifier, a cell specific reference signal (CRS) configuration, a non-zero power channel state information reference signal (NZP CSIRS) configuration, a zero-power (ZP) CSI-RS configuration, an EPDCCH start time, a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration, and a carrier index.