DRX operation for UL/DL reconfiguration

• US 9,867,078 B2
• Filed: 01/08/2016
• Issued: 01/09/2018
• 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:
  US14/991,696
• Publication Number:
  US 20160128131A1
• Time in Patent Office: 732 Days
• Field of Search: 370310-350
• 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. One or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors, are to:

identify, based on an indication of a downlink-reference (DL-reference) uplink/downlink (UL/DL) subframe configuration received via one or more radio resource control (RRC) signals, a value of k subframes associated with an interval between a DL transmission and a UL hybrid automatic repeat request (HARQ) feedback related to the DL transmission in accordance with the DL-reference UL/DL configuration;

identify a HARQ round-trip time (RTT) of k+4 subframes based on the value of k subframes; and

perform a HARQ process related to the HARQ RTT of k+4 subframes.

2. The one or more non-transitory computer-readable media of claim 1, wherein the DL transmission is a physical downlink shared channel (PDSCH) transmission.

3. The one or more non-transitory computer-readable media of claim 1, wherein the DL transmission is a time division duplexed (TDD) DL transmission.

4. The one or more non-transitory computer-readable media of claim 1, wherein the HARQ process includes activation of a timer related to retransmission of the DL transmission in response to the UL HARQ feedback.

5. An apparatus comprising:

means to receive an indication of a downlink-reference (DL-reference) uplink/downlink (UL/DL) subframe configuration via one or more radio resource control (RRC) signals;

means to identify, based on the indication, a value of k subframes associated with an interval between a DL transmission and a UL hybrid automatic repeat request (HARQ) feedback related to the DL transmission in accordance with the DL-reference UL/DL configuration;

means to identify a HARQ round-trip time (RTT) of k+4 subframes based on the value of k subframes; and

means to perform a HARQ process related to the HARQ RTT of k+4 subframes.

6. The apparatus of claim 5, wherein the DL transmission is a physical downlink shared channel (PDSCH) transmission.

7. The apparatus of claim 5, wherein the DL transmission is a time division duplexed (TDD) DL transmission.

8. The apparatus of claim 5, wherein the HARQ process is a HARQ retransmission process.

9. A user equipment (UE) comprising:

a processor to;

identify, based on an indication of a downlink-reference (DL-reference) uplink/downlink (UL/DL) subframe configuration received via one or more radio resource control (RRC) signals, a first subframe associated with a DL transmission and a second subframe associated with a UL hybrid automatic repeat request (HARQ) feedback related to the DL transmission in accordance with the DL-reference UL/DL configuration;

identify, based on an interval between the first subframe and the second subframe, a value of k subframes; and

activate a timer related to a value of k+4 subframes; and

transceiver circuitry coupled with the processor, the transceiver circuitry to;

receive the DL transmission and the indication of the DL-reference UL/DL subframe configuration; and

transmit the UL HARQ feedback.

10. The UE of claim 9, wherein the DL transmission is a time division duplexed (TDD) physical downlink shared channel (PDSCH) transmission.

11. The UE of claim 9, wherein the value of k+4 subframes is related to a HARQ round-trip time (RTT).

12. The UE of claim 9, wherein the timer is related to a HARQ retransmission.

13. The UE of claim 9, where the DL transmission is a time division duplex (TDD) transmission.

14. An apparatus comprising:

one or more processors; and

one or more non-transitory computer-readable media comprising instructions, that when executed by the one or more processors, cause the one or more processors to;

identify, based on an indication of a downlink-reference (DL-reference) uplink/downlink (UL/DL) subframe configuration received via one or more radio resource control (RRC) signals, a value of k subframes associated with an interval between a DL transmission and a UL hybrid automatic repeat request (HARQ) feedback related to the DL transmission in accordance with the DL-reference UL/DL configuration;

identify a HARQ round-trip time (RTT) of k+4 subframes based on the value of k subframes; and

perform a timer related to the HARQ RTT of k+4 subframes.

15. The apparatus of claim 14, wherein the DL transmission is a physical downlink shared channel (PDSCH) transmission.

16. The apparatus of claim 14, wherein the DL transmission is a time division duplexed (TDD) DL transmission.

17. The apparatus of claim 14, wherein the timer is related to retransmission of the DL transmission in response to the UL HARQ feedback.