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US-12627448-B2 - Adaptive physical downlink control channel (PDCCH) monitoring

US12627448B2US 12627448 B2US12627448 B2US 12627448B2US-12627448-B2

Abstract

The present application relates to devices and components including apparatus, systems, and methods to provide adaptive physical downlink control channel (PDCCH) monitoring. In particular, a unified signaling technique for adaptive PDCCH search space monitoring is descried. This signaling can indicate either one or a combination of the switching and skipping. In an example, the signaling includes multiple parts. In a first part, radio resource control (RRC) signaling is sent from the network to the device to configure the device for switching only, skipping only, or switching and skipping. In a second part, first DCI is sent from the network to the device to indicate the particular PDCCH monitoring configuration to use for the PDCCH search space monitoring. Thereafter, network sends second DCI in the relevant PDCCH search space, where this second DCI schedules traffic. The device performs blind decoding to determine the second DCI in order to exchange the traffic.

Inventors

  • Huaning Niu
  • Haitong Sun
  • Hongbo Yan
  • Dawei Zhang
  • Seyed Ali Akbar FAKOORIAN
  • Oghenekome Oteri
  • Sigen Ye
  • Weidong Yang
  • Wei Zeng
  • Hong He

Assignees

  • APPLE INC.

Dates

Publication Date
20260512
Application Date
20220107

Claims (20)

  1. 1 . An apparatus comprising: processing circuitry configured to: process radio resource control (RRC) information that indicates a plurality of physical downlink control channel (PDCCH) monitoring configurations, the plurality of PDCCH monitoring configurations including at least one of a switching configuration or a skipping configuration; process downlink control information (DCI) that includes a plurality of bits; determine a PDCCH monitoring configuration from the plurality of PDCCH monitoring configurations based on the bits and the plurality of PDCCH monitoring configurations, wherein a same value of the bits indicates the skipping configuration, the switching configuration, or a combination of the skipping configuration and the switching configuration based on whether the plurality of PDCCH monitoring configurations includes one or both of the switching configuration or the skipping configuration; and monitor a PDCCH search space based on the PDCCH monitoring configuration; and interface circuitry coupled with the processing circuitry and configured to receive RRC signaling.
  2. 2 . The apparatus of claim 1 , wherein a number of the bits in the DCI indicates at least one of the switching configuration or the skipping configuration.
  3. 3 . The apparatus of claim 2 , wherein the number of the bits is two.
  4. 4 . The apparatus of claim 2 , wherein the DCI has a DCI format of 1_1.
  5. 5 . The apparatus of claim 1 , wherein the plurality of PDCCH monitoring configurations includes a plurality of switching configurations, and wherein a number of the bits in the DCI indicates the switching configuration of the plurality of switching configurations.
  6. 6 . The apparatus of claim 1 , wherein the plurality of PDCCH monitoring configurations include a plurality of skipping configurations, and wherein a number of the bits in the DCI indicates the skipping configuration of the plurality of skipping configurations.
  7. 7 . The apparatus of claim 1 , wherein the plurality of PDCCH monitoring configurations includes a plurality of skipping configurations and a plurality of switching configuration, and wherein a number of the bits in the DCI indicates the skipping configuration and the switching configuration.
  8. 8 . The apparatus of claim 7 , wherein the number of the bits includes a first number of bits and a second number of bits, wherein the first number of bits indicates the skipping configuration and wherein the second number of bits indicates the switching configuration.
  9. 9 . The apparatus of claim 8 , the second number of bits indicates the switching configuration depending on the skipping configuration.
  10. 10 . The apparatus of claim 1 , wherein the PDCCH monitoring configuration includes the switching configuration and the skipping configuration, and wherein the PDCCH search space is monitored based on a PDCCH monitoring periodicity of the switching configuration and based on a number of slots between PDCCH search spaces of the skipping configuration.
  11. 11 . The apparatus of claim 1 , wherein the DCI is first DCI, the PDCCH search space is a first PDCCH search space, the PDCCH monitoring configuration is a first PDCCH monitoring configuration, and the processing circuitry is further configured to: process second DCI; determine, based on the second DCI, a second PDCCH monitoring configuration from the plurality of PDCCH monitoring configurations; and monitor a second PDCCH search space based on the second PDCCH monitoring configuration.
  12. 12 . One or more non-transitory computer-readable media comprising instructions to cause, upon execution of the instructions, operations comprising: processing radio resource control (RRC) information that indicates a plurality of physical downlink control channel (PDCCH) monitoring configurations, the plurality of PDCCH monitoring configurations including at least one of a switching configuration or a skipping configuration; processing downlink control information (DCI) that includes a plurality of bits; determining a PDCCH monitoring configuration from the plurality of PDCCH monitoring configurations based on the bits and the plurality of PDCCH monitoring configurations, wherein a same value of the bits indicates the skipping configuration, the switching configuration, or a combination of the skipping configuration and the switching configuration based on whether the plurality of PDCCH monitoring configurations includes one or both of the switching configuration or the skipping configuration; and monitoring a PDCCH search space based on the PDCCH monitoring configuration.
  13. 13 . The one or more non-transitory computer-readable media of claim 12 , wherein the DCI has a format that indicates the PDCCH monitoring configuration and secondary cell (SCell) dormancy.
  14. 14 . The one or more non-transitory computer-readable media of claim 12 , wherein the DCI is first DCI, and the operations further comprise: processing, prior to an on duration of a discontinuous reception (DRX) cycle, second DCI that has a format and that indicates a wake-up signal (WUS), and wherein the first DCI has the format and is received during the on duration based on the WUS.
  15. 15 . A method comprising: generating, for transmission to a user equipment (UE), radio resource control (RRC) information that indicates a plurality of physical downlink control channel (PDCCH) monitoring configurations, the plurality of PDCCH monitoring configurations including at least one of a switching configuration or a skipping configuration; generating, for transmission to the UE, first download control information (DCI) that indicates a PDCCH monitoring configuration of the plurality of PDCCH monitoring configurations, wherein a same value of bits of the DCI indicates the skipping configuration, the switching configuration, or a combination of the skipping configuration and the switching configuration based on whether the plurality of PDCCH monitoring configurations includes one or both of the switching configuration or the skipping configuration; and generating, for transmission to the UE, second DCI in a PDCCH search space based on the PDCCH monitoring configuration.
  16. 16 . The method of claim 15 , wherein the plurality of PDCCH monitoring configurations includes a plurality of switching configurations or a plurality of skipping configurations, and wherein a number of the bits in the DCI indicates the switching configuration of the plurality of switching configurations or the skipping configuration of the plurality of skipping configurations.
  17. 17 . The method of claim 15 , wherein the plurality of PDCCH monitoring configurations includes a plurality of switching configurations and a plurality of skipping configurations, and wherein a number of the bits in the DCI indicates the switching configuration of the plurality of switching configurations and the skipping configuration of the plurality of skipping configurations.
  18. 18 . The method of claim 15 , wherein the first DCI is sent on a component carrier, and wherein the PDCCH search space is monitored on the component carrier or a different component carrier.
  19. 19 . The method of claim 15 , further comprising: sending, to the UE, an RRC configuration indicating a group of component carriers to which the plurality of PDCCH monitoring configurations apply, wherein, for each component carrier of the group, a corresponding PDCCH search space is monitored based on the PDCCH monitoring configuration.
  20. 20 . The method of claim 19 , wherein the first DCI has a format that indicates the PDCCH monitoring configuration and secondary cell (SCell) dormancy.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a U.S. National Stage Application under 35 U.S.C. § 371 of International Patent Application No. PCT/US2022/011552, filed Jan. 7, 2022, which claims the benefit of U.S. Provisional Application No. 63/136,149, filed Jan. 11, 2021, which are hereby incorporated by reference in their entirety. BACKGROUND Fifth generation mobile network (5G) is a wireless standard that aims to improve upon data transmission speed, reliability, availability, and more. This standard, while still developing, includes numerous details relating to various aspects of power savings in support of wireless communication. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an example of a network environment in accordance with some embodiments. FIG. 2 illustrates an example of switching PDCCH monitoring periodicity in accordance with some embodiments. FIG. 3 illustrates an example of skipping PDCCH search space monitoring with some embodiments. FIG. 4 illustrates an example of switching PDCCH monitoring periodicity and skipping PDCCH monitoring in accordance with some embodiments. FIG. 5 illustrates an example of a diagram for signaling adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 6 illustrates an example of downlink control information (DCI)-based adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 7 illustrates an example of DCI for adaptive PDCCH search space monitoring with some embodiments. FIG. 8 illustrates an example of an operational flow/algorithmic structure for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 9 illustrates another example of an operational flow/algorithmic structure for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 10 illustrates an example of DCI-based update for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 11 illustrates an example of timer-based update for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 12 illustrates another example of timer-based update for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 13 illustrates yet another example of timer-based update for adaptive PDCCH search space monitoring in accordance with some embodiments. FIG. 14 illustrates an example of receive components in accordance with some embodiments. FIG. 15 illustrates an example of a UE in accordance with some embodiments. FIG. 16 illustrates an example of a base station in accordance with some embodiments. DETAILED DESCRIPTION The following detailed description refers to the accompanying drawings. The same reference numbers may be used in different drawings to identify the same or similar elements. In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular structures, architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the various aspects of various embodiments. However, it will be apparent to those skilled in the art having the benefit of the present disclosure that the various aspects of the various embodiments may be practiced in other examples that depart from these specific details. In certain instances, descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the various embodiments with unnecessary detail. For the purposes of the present document, the phrase “A or B” means (A), (B), or (A and B). Effort is made in the telecommunication industry to improve the power consumption of equipment that is compliant with the fifth generation mobile network (5G). Some of this effort is reflected in the 5G wireless standard. For example, the 5G wireless standard supports a connected mode, an idle mode, and an inactive mode. In a connected mode, a device can receive and/or send traffic from/to a network. If no traffic exists, the device can move to the idle mode and then, depending on the inactivity, to the inactive mode. In the idle and inactive modes, power savings can be achieved relative to the connected mode, with the inactive mode providing the most power saving. Further, within the connected mode, the 5G wireless standard supports discontinuous reception (DRX) for additional power saving. During an “on duration” of a DRX cycle, the device wakes up and monitors a physical downlink control channel (PDCCH) search space in a slot for downlink control information (DCI) that schedules the traffic exchange with the network. If no traffic is scheduled, the device enters a sleep mode, whereby it consumes less power. If traffic is scheduled, the device remains awake to then receive and/or transmit the traffic from/to the network. In 5G, a slot represents a unit of time that can be dynamically adjusted. A PDCCH search space refers to an area in the downlink resource grid where PDCCH may