EPDCCH COMMON SEARCH SPACE DESIGN FOR ONE OR MORE CARRIER TYPES

• US 20160043849A1
• Filed: 04/03/2014
• Published: 02/11/2016
• Est. Priority Date: 04/03/2013
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Tamaki, Nobuyuki, Lee, Moon-il
• Granted Patent: US 11,283,574 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Embodiments contemplate enhanced physical downlink control channel (EPDCCH). A user equipment (UE) or a wireless transmit/receive unit (WTRU) may receive a first type (e.g., type 1) EPDCCH common search space (CSS) subframe for example is a subset of subframes. The UE or WTRU may monitor first type downlink control information (DCI), for example perhaps within the first type EPDCCH CSS subframe, among other scenarios. A broadcast channel (e.g. MIB) may be received in the first type EPDCCH CSS. The UE or the WTRU may receive configuration information for a second type (e.g., type 2) EPDCCH CSS, for example from the first type EPDCCH CSS. A system information block (SIB) may be received in the second type EPDCCH CSS. The UE or the WTRU may monitor a second type DCI, for example perhaps in the second type EPDCCH CSS.

Claims

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

receiving, by a wireless transmit/receive unit (WTRU), an EPDCCH common search space (CSS) configuration, the EPDCCH CSS configuration including a designation of one or more subframes;

identifying, by the WTRU, a first subset of subframes of the one or more subframes based on the EPDCCH CSS configuration, the first subset of subframes corresponding to a first type EPDCCH CSS, the EPDCCH CSS configuration further including a designation of a first information corresponding to the first type EPDCCH CSS;

identifying, by the WTRU, a second subset of subframes of the one or more subframes based on the EPDCCH CSS configuration, the second subset of subframes corresponding to a second type EPDCCH CSS; and

monitoring the first subset of subframes for the first information.

2. The method of claim 1, wherein the receiving the EPDCCH CSS configuration includes:

receiving an indication of the first subset of subframes of the one or more subframes from a Master Information Block (MIB) via a Physical Broadcast Control Channel (PBCH); and

receiving an indication of the second subset of subframes of the one or more subframes from a System Information Block (SIB).

3. The method of claim 1, wherein the the EPDCCH CSS configuration further includes a designation of a second information corresponding to the second type EPDCCH CSS, the method further comprising:

monitoring the second subset of subframes for the second information.

4. The method of claim 1, wherein the monitoring the first subset of subframes for the first information includes monitoring a first type downlink control information (DCI).

5. The method of claim 4, wherein the first type of DCI is scrambled with a System Information Radio Network Temporary Identifier (SI-RNTI).

6. The method of claim 3, wherein the monitoring the second subset of subframes for the second information includes monitoring a second type downlink control information (DCI).

7. The method of claim 6, wherein the second type of DCI is scrambled with at least one of:

a Random Access Radio Network Temporary Identifier (RA-RNTI), a Paging Radio Network Temporary Identifier (P-RNTI), Transmit Power Control-Physical Uplink Control Channel Radio Network Temporary Identifier (TPC-PUCCH-RNTI), or a Transmit Power Control-Physical Uplink Shared Channel Radio Network Temporary Identifier (TPC-PUSCH-RNTI).

8. The method of claim 1, wherein the monitoring the first subset of subframes for the first information includes common reference signal (CRS) demodulation.

9. The method of claim 3, wherein the monitoring the first subset of subframes for the first information includes demodulation reference signal (DM-RS) demodulation.

10. The method of claim 1, wherein the monitoring the first subset of subframes for the first information includes obtaining system information related to a Master Information Block (MIB).

11. The method of claim 3, wherein the monitoring the first subset of subframes for the first information includes obtaining system information related to a System Information Block (SIB).

12. The method of claim 4, wherein the monitoring the first subset of subframes for the first information includes monitoring system information that includes at least one of:

encoding with a tail-biting convolution code or an attached sixteen bit cyclic redundancy check (CRC).

13. The method of claim 12, wherein the sixteen bit CRC is scrambled with a Master Information Block (MIB) specific Radio Network Temporary Identifier (RNTI).

14. The method of claim 4, wherein the monitoring the first subset of subframes for the first information includes monitoring a predefined time location in the first type EPDCCH CSS.

15. The method of claim 4, wherein the monitoring the first subset of subframes for the first information includes monitoring a predefined frequency location in the first type EPDCCH CSS.

16-25. -25. (canceled)

26. A wireless transmit/receive unit (WTRU), comprising:

a receiver, the receiver configured at least to;

receive an enhanced physical downlink control channel (EPDCCH) common search space (CSS) configuration, the EPDCCH CSS configuration including a designation of one or more subframes; and

a processor, the processor configured at least to;

identify a first subset of subframes of the one or more subframes based on the EPDCCH CSS configuration, the first subset of subframes corresponding to a first type EPDCCH CSS, the EPDCCH CSS configuration further including a designation of a first information corresponding to the first type EPDCCH CSS;

identify a second subset of subframes of the one or more subframes based on the EPDCCH CSS configuration, the second subset of subframes corresponding to a second type EPDCCH CSS; and

monitor the first subset of subframes for the first information.

27. The WTRU of claim 26, wherein the receiver is further configured such that the receiving the EPDCCH CSS configuration includes:

receiving an indication of the first subset of subframes of the one or more subframes from a Master Information Block (MIB) via a Physical Broadcast Control Channel (PBCH); and

receiving an indication of the second subset of subframes of the one or more subframes from a System Information Block (SIB).

28. The WTRU of claim 26, wherein the the EPDCCH CSS configuration further includes a designation of a second information corresponding to the second type EPDCCH CSS, the processor being further configured to:

monitor the second subset of subframes for the second information.

29. The WTRU of claim 26, wherein the processor is further configured such that the monitoring the first subset of subframes for the first information includes monitoring a first type downlink control information (DCI).

30. The WTRU of claim 28, wherein the processor is further configured such that the monitoring the second subset of subframes for the second information includes monitoring a second type downlink control information (DCI).