US-12621772-B2 - Two stage wakeup signals for a low power radio

US12621772B2US 12621772 B2US12621772 B2US 12621772B2US-12621772-B2

Abstract

Methods, systems, and devices for wireless communications are described. A UE may receive a first stage wakeup signal (WUS) indicating to monitor for a second stage WUS using a low power radio. For example, the first stage WUS may indicate whether to monitor one or more upcoming monitoring occasions for the second stage WUS using the low power radio. The UE may receive the second stage WUS based on receiving the indication included in the first stage WUS. The second stage WUS may indicate for the UE to activate a main radio to monitor for a control channel to receive data transmitted by the network entity. Based on receiving the second stage WUS, the UE may activate the main radio and receive data from the network entity.

Inventors

Ahmed Elshafie
Linhai He
Yuchul Kim
Wei Yang
Diana Maamari

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260505
Application Date: 20230724

Claims (20)

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 control signaling indicating timing information associated with monitoring for two stage wakeup signaling using a first radio of the UE, the first radio consuming less power than a second radio of the UE; receive a first stage wakeup signal of the two stage wakeup signaling using the first radio in accordance with the timing information, the first stage wakeup signal comprising one or more bits that indicate a start time of a time window to monitor for a second stage wakeup signal of the two stage wakeup signaling using the first radio; and monitor for the second stage wakeup signal of the two stage wakeup signaling during the time window using the first radio based at least in part on receiving the first stage wakeup signal and the indicated start time of the time window, the second stage wakeup signal indicating to wake up the second radio of the UE.
2 . The UE of claim 1 , wherein, to receive the second stage wakeup signal, the one or more processors are individually or collectively operable to execute the code to cause the UE to: monitor one or more low power discontinuous reception occasions using the first radio for the second stage wakeup signal, wherein the timing information indicates the one or more low power discontinuous reception occasions.
3 . The UE of claim 1 , wherein the timing information or the first stage wakeup signal, or both, indicates a periodicity of the time window, a duration of the time window, or any combination thereof.
4 . 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: monitor a control channel using the second radio based at least in part on receiving the first stage wakeup signal or the second stage wakeup signal, or both.
5 . The UE of claim 4 , wherein, to monitor for the control channel, the one or more processors are individually or collectively operable to execute the code to cause the UE to: monitor for the control channel using the second radio in a search space set group indicated by a payload of the first stage wakeup signal.
6 . 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: skip monitoring of an on duration of a discontinuous reception cycle, a synchronization signal block, a radio resource management measurement, a radio link monitoring measurement, a channel state information reference signal, a downlink channel, a downlink signal, an uplink channel, an uplink signal, a cell deactivation, a secondary cell switch, a bandwidth part switch for the second radio, or any combination thereof, based at least in part on the first stage wakeup signal or the second stage wakeup signal, or both.
7 . The UE of claim 1 , wherein, to receive the second stage wakeup signal, the one or more processors are individually or collectively operable to execute the code to cause the UE to: receive the second stage wakeup signal while operating in a connected mode.
8 . A network entity, 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 network entity to: transmit control signaling indicating timing information associated with monitoring for two stage wakeup signaling associated with a first radio of a user equipment (UE), the first radio consuming less power than a second radio of the UE; transmit a first stage wakeup signal of the two stage wakeup signaling in accordance with the timing information, the first stage wakeup signal comprising one or more bits that indicate a start time of a time window for the UE to monitor for a second stage wakeup signal of the two stage wakeup signaling using the first radio; and transmit the second stage wakeup signal of the two stage wakeup signaling during the time window based at least in part on the first stage wakeup signal and the indicated start time of the time window, the second stage wakeup signal indicating to wake up the second radio of the UE.
9 . The network entity of claim 8 , wherein, to transmit the second stage wakeup signal, the one or more processors are individually or collectively operable to execute the code to cause the network entity to: transmit the second stage wakeup signal during one or more low power discontinuous reception occasions associated with the first radio, wherein the timing information indicates the one or more low power discontinuous reception occasions.
10 . The network entity of claim 8 , wherein the timing information or the first stage wakeup signal, or both, indicates a periodicity of the time window, a duration of the time window, or any combination thereof.
11 . The network entity of claim 8 , wherein the timing information is based at least in part on a jitter of communications between the network entity and the UE.
12 . The network entity of claim 8 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the network entity to: transmit control signaling to be received by the UE using the second radio and using a search space set group indicated by a payload of the first stage wakeup signal.
13 . The network entity of claim 8 , wherein, to transmit the first stage wakeup signal, the one or more processors are individually or collectively operable to execute the code to cause the network entity to: transmit the first stage wakeup signal including an indication for the UE to skip an on duration of a discontinuous reception cycle, a synchronization signal block, a radio resource management measurement, a radio link monitoring measurement, a channel state information reference signal, a downlink channel, a downlink signal, an uplink channel, an uplink signal, a cell deactivation, a secondary cell switch, a bandwidth part switch for the second radio, or any combination thereof.
14 . A method for wireless communications at a user equipment (UE), comprising: receiving control signaling indicating timing information associated with monitoring for two stage wakeup signaling using a first radio of the UE, the first radio consuming less power than a second radio of the UE; receiving a first stage wakeup signal of the two stage wakeup signaling using the first radio in accordance with the timing information, the first stage wakeup signal comprising one or more bits that indicate a start time of a time window to monitor for a second stage wakeup signal of the two stage wakeup signaling using the first radio; and monitoring for the second stage wakeup signal of the two stage wakeup signaling during the time window using the first radio based at least in part on receiving the first stage wakeup signal and the indicated start time of the time window, the second stage wakeup signal indicating to wake up the second radio of the UE.
15 . The method of claim 14 , wherein receiving the second stage wakeup signal comprises: monitoring one or more low power discontinuous reception occasions using the first radio for the second stage wakeup signal, wherein the timing information indicates the one or more low power discontinuous reception occasions.
16 . The method of claim 14 , wherein the timing information or the first stage wakeup signal, or both, indicates a periodicity of the time window, a duration of the time window, or any combination thereof.
17 . The method of claim 14 , further comprising: monitoring a control channel using the second radio based at least in part on receiving the first stage wakeup signal or the second stage wakeup signal, or both.
18 . The method of claim 17 , wherein monitoring for the control channel comprises: monitoring for the control channel using the second radio in a search space set group indicated by a payload of the first stage wakeup signal.
19 . The method of claim 14 , further comprising: skipping monitoring of an on duration of a discontinuous reception cycle, a synchronization signal block, a radio resource management measurement, a radio link monitoring measurement, a channel state information reference signal, a downlink channel, a downlink signal, an uplink channel, an uplink signal, a cell deactivation, a secondary cell switch, a bandwidth part switch for the second radio, or any combination thereof, based at least in part on the first stage wakeup signal or the second stage wakeup signal, or both.
20 . The method of claim 14 , wherein receiving the second stage wakeup signal comprises: receiving the second stage wakeup signal while operating in a connected mode.

Description

FIELD OF TECHNOLOGY The present disclosure relates to wireless communications, including two stage wakeup signals for a low power radio. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support two stage wakeup signals for a low power radio. For example, the described techniques provide for a user equipment (UE) receiving a first stage wakeup signal (WUS) and a second stage WUS to receive data transmitted by a network entity. Using a low power radio, the UE may receive a first stage WUS indicating to monitor for a second stage WUS which is also received using the low power radio. For example, the first stage WUS may indicate whether to monitor one or more upcoming monitoring occasions for the second stage WUS using the low power radio. The UE may receive the second stage WUS based on receiving the first stage WUS. The second stage WUS may indicate for the UE to activate a main radio to monitor for a control channel to receive data transmitted by a network entity. Based on receiving the second stage WUS, the UE may activate the main radio and receive data from the network entity. In some examples, the first stage WUS may indicate for the UE to skip monitoring for a second state WUS using the low power radio or to skip monitoring for the control channel using the main radio, or both. A method for wireless communications by a UE is described. The method may include receiving control signaling indicating timing information associated with monitoring for two stage wakeup signaling using a first radio of the UE, the first radio consuming less power than a second radio of the UE, receiving a first stage WUS of the two stage wakeup signaling using the first radio in accordance with the timing information, the first stage WUS indicating for the first radio to start monitoring for a second stage WUS of the two stage wakeup signaling, and monitoring for the second stage WUS of the two stage wakeup signaling using the first radio based on receiving the first stage WUS, the second stage WUS indicating to wake up the second radio of the UE. A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the UE to receive control signaling indicating timing information associated with monitoring for two stage wakeup signaling using a first radio of the UE, the first radio consuming less power than a second radio of the UE, receive a first stage WUS of the two stage wakeup signaling using the first radio in accordance with the timing information, the first stage WUS indicating for the first radio to start monitoring for a second stage WUS of the two stage wakeup signaling, and monitor for the second stage WUS of the two stage wakeup signaling using the first radio based on receiving the first stage WUS, the second stage WUS indicating to wake up the second radio of the UE. Another UE for wireless communications is described. The UE may include means for receiving control signaling indicating timing information associated with monitoring for two stage wakeup signaling using a first radio of the UE, the first radio consuming less power than a second radio of the UE, means for receiving a first stage WUS of the two stage wakeup signaling using the first radio in accordance with the timing information, the first stage WUS indicating for the first radio to start monitoring for a second stage WUS of the two stage wakeup signaling, and means for monitoring for the second stage WUS of the two stage wakeup signaling using the first radio based on receiving the first stage WUS, the second stage WUS indicating to wake up the second radio of the UE. A non-transitory computer-readable medium storing code for wi