US 11997597

US11997597B2 — Patent Overview

Title: Method of monitoring physical downlink control channel for power saving signal and related device

Patent: US11997597B2 (application US18/136,449; published as US20230413174A1)

Assignee (per listing): Hannibal IP LLC (listed original assignee)

Dates: Priority date 2019-08-14; filed 2023-04-19; granted 2024-05-28. Listed legal status: Active, with anticipated expiration 2040-08-11.

Inventors: Yu-Hsin Cheng, Hsin-Hsi Tsai, Chia-Hao Yu, Chie-Ming Chou

Purpose: The disclosure addresses UE power saving in New Radio (NR), specifically the absence of specification for how a power saving signaling (also called a wake-up signal, WUS) is configured. The WUS triggers UE adaptation to discontinuous reception (DRX) to reduce the number of PDCCH monitoring occasions, and is configured outside DRX active time in a new downlink control information (DCI) format. Without defined configuration rules, "the UE may not know when to monitor the PDCCH for the power saving signaling."

Plain-language scope: The claimed method has a UE (1) receive a DRX configuration from a base station configuring it to monitor a scheduling signal on the PDCCH within a DRX active time, and (2) receive a configuration to monitor the power saving signaling on the PDCCH—which instructs the UE to wake up to monitor the scheduling signal during DRX active time—where that configuration "includes a time in milliseconds prior to a start of a DRX on-duration time" and instructs the UE to start monitoring the PDCCH for the power saving signaling. A corresponding UE (processor plus non-transitory machine-readable medium) is also described. The specification describes monitoring according to configured parameters of an associated search space set (common or UE-specific) and CORESET.

Source: https://patents.google.com/patent/[US11997597](/patent/US11997597)/en

Not established by this excerpt: The full claim set and their exact wording; the detailed embodiments (e.g., FIGS. 2A–6 on PDCCH monitoring, configuration, occasion shifting, multiple TRP, and multiple monitoring occasions); the omitted body text (the excerpt is truncated); and any IEEE/3GPP specification version numbers. (Per instructions, litigation, transfers, validity, and prior art are not addressed.)