DRX operation for UL/DL reconfiguration

• US 10,306,509 B2
• Filed: 07/25/2017
• Issued: 05/28/2019
• Est. Priority Date: 09/17/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: He, Hong, Heo, Youn Hyoung, Fong, Mo-Han, Khoryaev, Alexey
• Primary Examiner(s): Phan, Tri H
• Application Number:
  US15/659,425
• Publication Number:
  US 20170332271A1
• Time in Patent Office: 672 Days
• CPC Class Codes: G01S 5/0236 Assistance data, e.g. base station almanac
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04J 13/0048 Walsh
• CPC Class Codes: H04J 3/02 Details electronic switching or gating H03K17/00
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 28/0242 Determining whether packet losses are due to overload or to deterioration of radio communication conditions
• CPC Class Codes: H04W 28/0247 based on conditions of the access network or the infrastructure network central resource management H04W28/16
• CPC Class Codes: H04W 28/0268 using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 4/14 Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0466 : the resource being a scrambling code
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

In embodiments, apparatuses, methods, and storage media may be described for identifying subframes in a radio frame on which a UE may receive a Physical Downlink Control Channel (PDCCH) or enhanced PDCCH (ePDCCH) transmission. Specifically, the UE may receive multiple indications of uplink/downlink (UL/DL) subframe configurations and identify one or more subframes in which the UE may receive the PDCCH or ePDCCH transmission. The UE may then monitor one or more of the identified subframes and base discontinuous reception (DRX) timer functionality on one or more of the identified subframes.

Claims

1. A user equipment (UE) comprising:

a transceiver to;

identify, in a physical downlink control channel (PDCCH) or enhanced PDCCH (ePDCCH) message received from a base station by one or more antennas of the UE, an indication of a first time division duplexed (TDD) uplink/downlink (UL/DL) configuration of a plurality of TDD UL/DL configurations; and

identify, in a system information block type 1 (SIB1) message, an indication of a second TDD UL/DL configuration;

a processor coupled with the transceiver, the processor to;

identify a subframe that is a DL subframe based on the first TDD UL/DL configuration indicated by the PDCCH or ePDCCH message, wherein the subframe is indicated as a UL subframe in the second TDD UL/DL configuration indicated by the SIB1 message; and

monitor, in a discontinuous reception (DRX) operation of the UE, the subframe for a PDCCH transmission transmitted by the base station.

2. The UE of claim 1, wherein the PDCCH transmission is an enhanced PDCCH (ePDCCH) transmission.

3. The UE of claim 1, wherein the first and second TDD UL/DL configurations are related to enhanced interference mitigation and traffic adaptation (eIMTA) operation.

4. The UE of claim 1, wherein the subframe is a flexible subframe of the plurality of TDD UL/DL configurations.

5. The UE of claim 1, wherein the processor is further to base a DRX timer on the subframe.

6. One or more non-transitory computer-readable media comprising instructions that, upon execution of the instructions by one or more processors of a user equipment (UE), are to cause the UE to:

identify, in a physical downlink control channel (PDCCH) or enhanced PDCCH (ePDCCH) received from a base station, an indication of a first time division duplexed (TDD) uplink/downlink (UL/DL) configuration of a plurality of TDD UL/DL configurations;

identify, in a system information block type 1 (SIB1) message, an indication of a second TDD UL/DL configuration that indicates downlink subframes and uplink subframes;

identify a subframe that is a DL subframe based on the first TDD UL/DL configuration, wherein the subframe is indicated as a UL subframe in the second TDD UL/DL configuration indicated by the SIB1 message; and

monitor, in a discontinuous reception (DRX) operation of the UE, the subframe for a PDCCH transmission transmitted by the base station.

7. The one or more non-transitory computer-readable media of claim 6, wherein the PDCCH transmission is an enhanced PDCCH (ePDCCH) transmission.

8. The one or more non-transitory computer-readable media of claim 6, wherein the first and second TDD UL/DL configurations are related to enhanced interference mitigation and traffic adaptation (eIMTA) operation.

9. The one or more non-transitory computer-readable media of claim 6, wherein the instructions are further to cause the UE to base a DRX timer on the indicated downlink subframes based on the second TDD UL/DL configuration in the SIB1 message.

10. The one or more non-transitory computer-readable media of claim 6, wherein the subframe is a flexible subframe of the plurality of TDD UL/DL configurations.

11. A method comprising:

identifying, by a user equipment (UE) in a physical downlink control channel (PDCCH) or enhanced PDCCH (ePDCCH) received from a base station, an indication of a first time division duplexed (TDD) uplink/downlink (UL/DL) configuration of a plurality of TDD UL/DL configurations;

identifying, by the UE, a subframe that is a DL subframe based on the first TDD UL/DL configuration, wherein the subframe is indicated as a UL subframe in a second TDD UL/DL configuration indicated by a system information block type 1 (SIB1) message; and

monitoring, by the UE, the subframe for a PDCCH transmission transmitted by the base station.

12. The method of claim 11, wherein the PDCCH transmission is an enhanced PDCCH (ePDCCH) transmission.

13. The method of claim 11, wherein the first and second TDD UL/DL configurations are related to enhanced interference mitigation and traffic adaptation (eIMTA) operation.

14. The method of claim 11, further comprising basing a DRX timer on the subframe.

15. The method of claim 11, wherein the subframe is a flexible subframe of the plurality of TDD UL/DL configurations.

16. An apparatus comprising:

means to identify, based on a physical downlink control channel (PDCCH) or enhanced PDCCH (ePDCCH) message, a first time division duplexed (TDD) uplink/downlink (UL/DL) configuration that indicates downlink subframes in a radio frame;

means to identify, based on a system information block type 1 (SIB1) message, a second TDD UL/DL configuration that indicates downlink subframes in the radio frame;

means to identify at least one subframe of the indicated downlink subframes in the radio frame by the first TDD UL/DL configuration, wherein the at least one subframe is indicated as an uplink subframe by the second TDD UL/DL configuration;

means to monitor the at least one subframe of the indicated downlink subframes for a PDCCH transmission based on the first TDD UL/DL configuration in the PDCCH message; and

means to base a discontinuous reception (DRX) timer on the indicated downlink subframes based on the second TDD UL/DL configuration in the SIB1 message.

17. The apparatus of claim 16, wherein the first and second TDD UL/DL configurations are related to enhanced interference mitigation and traffic adaptation (eIMTA) operation.

18. The apparatus of claim 16, wherein the PDCCH transmission is an enhanced PDCCH (ePDCCH) transmission.

19. The apparatus of claim 16, wherein the at least one subframe is a flexible subframe.