Downlink control channel monitoring occasion configuration for on-demand system information

Patent metadata

Field	Value
Publication number	US-2026101284-A1
Application number	US-202519243571-A
Country	US
Kind code	A1
Filing date	Jun 19, 2025
Priority date	Oct 4, 2024
Publication date	Apr 9, 2026
Grant date	—

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of an uplink wake up signal (WUS) configuration for on-demand system information block 1 (SIB1) triggered by a WUS. The UE may receive, during a random access response (RAR) window, an RAR message based on the uplink wake up signal. The UE may monitor for one or more on-demand SIBs during a physical downlink control channel (PDCCH) window. In some examples, the uplink WUS configuration or the RAR message may indicate a start time and duration of the PDCCH window. In some examples, a network entity may use slot aggregation to transmit repeated on-demand SIB1s. The RAR message or the uplink WUS configuration may indicate a slot aggregation parameter.

First claim

What is claimed is:

1 . A user equipment (UE), comprising:
one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:
receive a control signal indicating an uplink wake up signal configuration for on-demand system information block 1 (SIB1) that is triggered by an uplink wake up signal;
receive, during a random access response window, a random access response message based at least in part on the uplink wake up signal; and
monitor, based at least in part on the random access response message and during a physical downlink control channel window, for one or more on-demand system information blocks, wherein the physical downlink control channel window comprises a start time and a duration.

2 . The UE of claim 1 , wherein the start time of the physical downlink control channel window occurs after a time offset from a reference time point.

3 . The UE of claim 2 , wherein the start time of the physical downlink control channel window aligns with a start of an earliest downlink control channel occasion after the time offset based at least in part on an index of a received synchronization signal block.

4 . The UE of claim 2 , wherein the reference time point corresponds to the random access response window or a time of reception of the random access response message.

5 . The UE of claim 2 , wherein the uplink wake up signal configuration or the random access response message includes a configuration for the reference time point.

6 . The UE of claim 2 , wherein the time offset is specified in a technical specification based on a physical downlink shared channel processing latency for the random access response message.

7 . The UE of claim 2 , wherein the reference time point is specified in a technical specification.

8 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive an indication of the start time, the duration, or both, from the uplink wake up signal configuration.

9 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive an indication of the start time, the duration, or both, from the random access response message.

10 . The UE of claim 9 , wherein the random access response message indicates one or more values, an index to a list of values, one or more delta values, or any combination thereof, to indicate the start time or the duration, or both.

11 . The UE of claim 1 , wherein the start time corresponds to a slot boundary or a symbol boundary based at least in part on a first downlink subcarrier spacing indicated by a master information block or a second downlink subcarrier spacing indicated by the uplink wake up signal configuration.

12 . The UE of claim 1 , wherein:
the duration of the physical downlink control channel window corresponds to a first quantity of milliseconds, a second quantity of slots, a third quantity of synchronization signal block periods, or any combination thereof, and the second quantity of slots is based at least in part on a first downlink subcarrier spacing indicated by a master information block or a second downlink subcarrier spacing indicated by the uplink wake up signal configuration.

13 . A user equipment (UE), comprising:
one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:
receive a control signal indicating an uplink wake up signal configuration for on-demand system information block 1 (SIB1) that is triggered by an uplink wake up signal;
receive, during a random access response window, a random access response message based at least in part on the uplink wake up signal; and
monitor a plurality of physical downlink control channel monitoring occasions for a respective plurality of system information blocks based on a slot aggregation parameter indicated via the uplink wake up signal configuration or the random access response message, or both.

14 . The UE of claim 13 , wherein, to monitor the plurality of physical downlink control channel monitoring occasions, the one or more processors are individually or collectively operable to execute the code to cause the UE to:
monitor the plurality of physical downlink control channel monitoring occasions across a plurality of system information block transmission repetition periods, wherein a physical downlink control channel monitoring window comprises the plurality of system information block transmission repetition periods.

15 . The UE of claim 13 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive a physical downlink control channel signal scheduling a grant in a first physical downlink control channel monitoring occasion within a physical downlink control channel monitoring window, wherein the grant schedules a physical downlink shared channel slot aggregation for transmission of a system information block over consecutive slots based at least in part on the slot aggregation parameter.

16 . The UE of claim 13 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
receive an indication of the slot aggregation parameter, a duration of a physical downlink control channel window, and a time offset to the physical downlink control channel window via the random access response message or via the uplink wake up signal configuration, or both.

17 . A method for wireless communications at a user equipment (UE), comprising:
receiving a control signal indicating an uplink wake up signal configuration for on-demand system information block 1 (SIB1) that is triggered by an uplink wake up signal; receiving, during a random access response window, a random access response message based at least in part on the uplink wake up signal; and monitoring a plurality of physical downlink control channel monitoring occasions for a respective plurality of system information blocks based on a slot aggregation parameter indicated via the uplink wake up signal configuration or the random access response message, or both.

18 . The method of claim 17 , wherein monitoring the plurality of physical downlink control channel monitoring occasions comprises:
monitoring the plurality of physical downlink control channel monitoring occasions across a plurality of system information block transmission repetition periods, wherein a physical downlink control channel monitoring window comprises the plurality of system information block transmission repetition periods.

19 . The method of claim 17 , further comprising:
receiving a physical downlink control channel signal scheduling a grant in a first physical downlink control channel monitoring occasion within a physical downlink control channel monitoring window, wherein the grant schedules a physical downlink shared channel slot aggregation for transmission of a system information block over consecutive slots based at least in part on the slot aggregation parameter.

20 . The method of claim 17 , further comprising:
receiving an indication of the slot aggregation parameter, a duration of a physical downlink control channel w

Assignees

• Qualcomm Incorporated

Inventors

• Luo Jianghong
• Abedini Navid
• Ly Hung Dinh

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W52/0235 Primary

  where the received signal is a power saving command · CPC title