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

• US 10,555,292 B2
• Filed: 12/18/2017
• Issued: 02/04/2020
• 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 K
• Application Number:
  US15/845,018
• Publication Number:
  US 20180110034A1
• Time in Patent Office: 778 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, by a network side device, 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, by the network side device, 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;

acquiring, by the UE, the M PRB sets, the N RS configurations, and the correspondence between the M PRB sets and the N RS configurations; and

performing, by the UE, 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.

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 the correspondence between the M PRB sets and the N RS configurations comprises that at least one PRB set of the M PRB sets corresponds to at least two RS configurations of the N RS configurations.

5. The method according to claim 4, further comprising:

sending first indication signaling to the UE for indicating a first RS configuration that corresponds to each PRB set of the at least one PRB set and for the EPDCCH DCI rate matching and/or the EPDCCH resource mapping.

6. The method according to claim 2, wherein the N RS configurations correspond to N different cells or network nodes respectively, and determining at least one RS configuration of the N RS configurations comprises:

selecting the at least one RS configuration according to one or more of channel quality, network load, and spectrum efficiency of the N different cells or network nodes corresponding to the N RS configurations.

7. The method according to claim 1, wherein the N RS configurations correspond to N different serving cells respectively, and the N different serving cells have a same carrier frequency and different cell identifiers.

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

a cell identifier, the RS configuration index, 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.

9. The method according to claim 1, wherein PRB sets of the M PRB sets may comprise the same PRB, and when PRBs comprised in two PRB sets of the M PRB sets are the same, the two PRB sets are one PRB set.

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

a network-side device; and

a user equipment (UE);

wherein the network-side device is configured to;

notify the UE of M physical resource block (PRB) sets for enhanced physical downlink control channel (EPDCCH) transmission and N reference signal (RS) configurations for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping,

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

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 network-side device 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;

wherein the UE is configured to;

acquire the M PRB sets, N RS configurations and the correspondence between the M PRB sets and the N RS configurations, and

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.

11. The system according to claim 10, wherein the network side device 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.

12. The system according to claim 10, 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.

13. The system according to claim 10, wherein the network side device is further configured to:

send first indication signaling to the UE for indicating a first RS configuration that corresponds to each PRB set of at least one PRB set and is for the EPDCCH DCI rate matching and/or the EPDCCH resource mapping.

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

a cell identifier, the RS configuration index, a CRS configuration, an NZP CSIRS configuration, a 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 system according to claim 10, wherein the UE is further configured to perform quasi colocation (QCL) hypothesis on each PRB set of the M PRB sets.

16. The system according to claim 10, wherein the UE is configured to perform quasi colocation (QCL) hypothesis according to the RS configuration corresponding to each PRB set of the M PRB sets.

17. A non-transitory computer-readable storage medium comprising instructions that, when executed by a computer, cause the computer to:

notify a user equipment (UE) of M physical resource block (PRB) sets for enhanced physical downlink control channel (EPDCCH) transmission and N reference signal (RS) configurations for EPDCCH downlink control information (DCI) rate matching and/or EPDCCH resource mapping;

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

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, send to the UE a 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;

acquire the M PRB sets, N RS configurations and the correspondence between the M PRB sets and the N RS configurations; and

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.