DRX operation for UL/DL reconfiguration

• US 9,264,933 B2
• Filed: 06/26/2014
• Issued: 02/16/2016
• Est. Priority Date: 09/17/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• 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:
  US14/316,188
• Publication Number:
  US 20150078349A1
• Time in Patent Office: 600 Days
• Field of Search: 370310-350, 370396-401, 370/431, 370435-485, 370/498
• US Class Current: 1/1
• 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:

receiver circuitry to receive downlink (DL) subframes and subframes that include a downlink pilot time slot (DwPTS) in a radio frame;

a processor coupled with the receiver circuitry, the processor to;

identify, based only on DL subframes and subframes that include a DwPTS in a first uplink/downlink (UL/DL) configuration in a plurality of received UL/DL configurations, the DL subframes and subframes that include the DwPTS in the radio frame, wherein at least one subframe of the DL subframes or the subframes that include the DwPTS in the first UL/DL configuration is identified as a UL subframe in the radio frame based on a second UL/DL configuration in the plurality of received UL/DL configurations;

base a DRX timer on the DL subframes and subframes that include the DwPTS in the radio frame; and

monitor one of the at least one of the DL subframes and subframes that include the DwPTS in the radio frame for a Physical Downlink Control Channel (PDCCH) transmission or an enhanced PDCCH (ePDCCH) transmission.

2. The UE of claim 1, wherein the UE is an enhanced interference mitigation and traffic adaptation (eIMTA)-enabled UE.

3. The UE of claim 1, wherein the DRX timer is a DRX duration timer, a DRX inactivity timer, or a DRX retransmission timer.

4. The UE of claim 1, wherein the receiver circuitry is to receive an indication of the first or second UL/DL configurations in a system information block type 1 (SIB1) message from an eNodeB (eNB), a radio resource control (RRC) signal, or a PDCCH message or an ePDCCH message in a first subframe or higher-layer configured subframes of one radio frame.

5. The UE of claim 4, wherein the receiver circuitry is to receive the indication of the first UL/DL configuration in the SIB1 message, and wherein the DL subframes and the subframes that include the DwPTS in the radio frame are DL subframes or subframes that include the DwPTS in a plurality of possible UL/DL configurations indicated in the SIB1 message.

6. The UE of claim 4, wherein the receiver circuitry is to receive the indication of the first UL/DL configuration in the RRC signal.

7. The UE of claim 4, wherein receiver circuitry is to receive the indication of the first UL/DL configuration in the PDCCH message or the ePDCCH message in a first subframe or higher-layer configured subframes of one radio frame.

8. The UE of claim 1, further comprising display circuitry coupled with the processor.

9. The method of claim 1, wherein the processor is further to identify the first UL/DL configuration based on an indication of the first UL/DL configuration received from an evolved NodeB (eNB).

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

identify a plurality of uplink/downlink (UL/DL) configurations applicable to subframes in a plurality of radio frames;

identify an indicated UL/DL configuration received in a Physical Downlink Control Channel (PDCCH) or an enhanced PDCCH (ePDCCH) message in a first subframe or higher-layer configured subframes of a radio frame in the plurality of radio frames, the indicated UL/DL configuration applicable to a plurality of subframes in the radio frame;

identify DL subframes and subframes that include a downlink pilot time slot (DwPTS) in the radio frame based only on a first one of the UL/DL configurations in the plurality of UL/DL configurations and the indicated UL/DL configuration, wherein at least one subframe of the DL subframes or subframes that include the DwPTS is a UL subframe in a second one of the UL/DL configurations and the indicated UL/DL configuration;

increment a running discontinuous reception (DRX) timer based only on the identified DL subframes and subframes that include the DwPTS; and

monitor the identified DL subframes and subframes that include the DwPTS for a PDCCH message while the DRX timer is running.

11. The one or more non-transitory computer-readable media of claim 10, wherein a UL/DL configuration in the plurality of UL/DL configurations is received in a system information block type 1 (SIB1) message from an eNodeB (eNB).

12. The one or more non-transitory computer-readable media of claim 11, wherein the instructions are further to identify the DL subframes and subframes that include the DwPTS that are DL subframes or subframes that include the DwPTS in a plurality of possible UL/DL configurations indicated in the SIB1 message.

13. The one or more non-transitory computer-readable media of claim 11, wherein the first one of the UL/DL configurations is the UL/DL configuration received in the SIB1 message.

14. The one or more non-transitory computer-readable media of claim 11, wherein the first one of the UL/DL configurations is a UL/DL configuration indicated by radio resource control (RRC) signaling.

15. The one or more non-transitory computer-readable media of claim 11, wherein the first one of the UL/DL configurations is the UL/DL configuration indicated in the PDCCH or the EPDCCH message in the first subframe or higher-layer configured subframes of the radio frame in the plurality of radio frames.

16. The one or more non-transitory computer-readable media of claim 10, wherein the DRX timer is a DRX duration timer, a DRX inactivity timer, or a DRX retransmission timer.

17. The one or more non-transitory computer-readable media of claim 10, wherein the UE is an enhanced interference mitigation and traffic adaptation (eIMTA)-enabled UE.

18. A method comprising:

receiving, at a UE, respective indications of a plurality of uplink/downlink (UL/DL) configurations applicable to subframes of a radio frame;

identifying, by the UE based only on a first UL/DL configuration in the plurality of UL/DL configurations, DL subframes and subframes that include a downlink pilot time slot (DwPTS) in the subframes of the radio frame, wherein the identified DL subframes and the subframes that include the DwPTS are UL subframes in a second UL/DL configuration in the plurality of UL/DL configurations;

starting, by the UE, a timer related to a discontinuous reception (DRX) operation of the UE;

monitoring, by the UE while the timer related to the DRX operation of the UE is running, a Physical Downlink Control Channel (PDCCH) or an enhanced PDCCH (ePDCCH) for a message only during the identified DL subframes and the identified subframes that include the DwPTS; and

incrementing, by the UE, the DRX timers based only on the identified DL subframes and the subframes that include the DwPTS in the radio frame.

19. The method of claim 18, wherein an indication in the respective indications is received by the UE in a system information block type 1 (SIB1) message from an eNodeB (eNB).

20. The method of claim 19, further comprising identifying, by the UE, the first UL/DL configuration based only on the indication received in the SIB1 message.

21. The method of claim 19, wherein the indication is a first indication, and wherein:

a second indication of the respective indications is received by the UE via radio resource control (RRC) signaling; and

a third indication of the respective indications is received by the UE in a PDCCH or an ePDCCH message in a first subframe or higher-layer configured subframes of the radio frame.

22. The method of claim 21, further comprising identifying, by the UE, the DL subframes and the subframes that include the DwPTS in the subframes of the radio frame based only on one of the second indication or the third indication.

23. The method of claim 18, wherein the timer is a DRX duration timer, a DRX inactivity timer, or a DRX retransmission timer.

24. The method of claim 18, wherein the UE is an enhanced interference mitigation and traffic adaptation (eIMTA)-enabled UE.