Methods, systems, and devices for wireless communications are described. A user equipment (UE) may enter a lower power mode of operation, and may receive, from a base station, a non-coherent signal while the UE is operating in the lower power mode. The UE may identify an indication to transition from the lower power mode to a higher power mode of operation based at least in part on receiving the non-coherent signal. The UE may enter the higher power mode based at least in part on identifying the indication.

FIELD OF TECHNOLOGY

The following relates generally to wireless communications and more specifically to a non-coherent wake-up signal.

BACKGROUND

In some wireless communications, a UE may enter a lower power mode of operation (e.g., connected discontinuous reception cycle) in order to conserve power. During the lower power mode, the UE may operate in a “sleep and wake” cycle, in which the UE may periodically wake to monitor a physical downlink control channel (PDCCH) in order to identify whether there is traffic waiting to be transmitted to the UE. To monitor the PDCCH, the UE may activate the baseband component of the UE during each wake cycle.

Accordingly, even when no traffic is waiting to be transmitted to the UE, the UE may utilize the baseband component, leading to high power consumption.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support a non-coherent wake-up signal (WUS). Generally, the described techniques provide for non-coherent WUS, which may enable a user equipment (UE) to reduce power consumption when the UE is operating in a lower power mode of operation. The UE may enter a lower power mode of operation, and receive a non-coherent signal while the UE is operating in the lower power mode of operation. During the lower power mode, a wake-up component may be active, and a baseband component of the UE may be inactive. In this regard, the wake-up component may identify and/or decode the non-coherent signal without activating the baseband component. The non-coherent signal may include an indication to transition from the lower power mode to a higher power mode of. The wake-up component may then cause the UE to enter the higher power mode based on identifying the indication. These techniques may simplify processing used to process a wake-up signal, thereby decreasing power consumption of the lower power mode at the UE. Further, by processing the non-coherent signal with the wake-up component, the UE may avoid activating (e.g., waking up) the more power-intensive baseband component until traffic is waiting to be transmitted to the UE.

A method of wireless communication at a user equipment is described. The method may include entering a lower power mode of operation, receiving, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identifying, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation, and entering the higher power mode based on identifying the indication.

An apparatus for wireless communication at a user equipment is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to enter a lower power mode of operation, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation, and enter the higher power mode based on identifying the indication.

Another apparatus for wireless communication at a user equipment is described. The apparatus may include means for entering a lower power mode of operation, receiving, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identifying, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation, and entering the higher power mode based on identifying the indication.

A non-transitory computer-readable medium storing code for wireless communication at a user equipment is described. The code may include instructions executable by a processor to enter a lower power mode of operation, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation, and enter the higher power mode based on identifying the indication.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the indication to transition from the lower power mode of operation to the higher power mode of operation may include operations, features, means, or instructions for identifying, with a wake-up component associated with a first power source of the user equipment that may be isolated from a second power source associated with a baseband component, the indication to transition from the lower power mode to the higher power mode based on receiving the non-coherent signal.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the wake-up component includes a processor, a field-programmable gate array (FPGA), or an application-specific integrated circuit (ASIC).

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, within the non-coherent signal, a first resource element and a second resource element, and performing one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value, where identifying the indication to transition from the lower power mode to the higher power mode may be based on the indicator value.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for multiplying the first resource element by a conjugate of the second resource element, where performing the one or more differential decoding operations may be based on multiplying the first resource element by the conjugate of the second resource element.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indicator value includes a logarithm likelihood ratio (LLR) value.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying an orthogonal frequency division multiplexing (OFDM) symbol within the non-coherent signal, and removing a cyclic prefix from the OFDM symbol to retrieve the first resource element, where identifying the first resource element may be based on removing the cyclic prefix from the OFDM symbol.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second resource element immediately proceeds the first resource element.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the non-coherent signal may be conveyed over a PDCCH.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a control message including a second indication that the user equipment may be configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal may be based on transmitting the control message.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the control message including the indication that the user equipment may be configured to receive the non-coherent signal occurs prior to entering the lower power mode of operation.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the lower power mode of operation includes an inactive period of a discontinuous reception cycle, and the higher power mode of operation includes an active period of the discontinuous reception cycle.

A method of wireless communication at a base station is described. The method may include identifying that a user equipment is in a lower power mode of operation, identifying traffic waiting to be transmitted to the user equipment, and transmitting, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify that a user equipment is in a lower power mode of operation, identify traffic waiting to be transmitted to the user equipment, and transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for identifying that a user equipment is in a lower power mode of operation, identifying traffic waiting to be transmitted to the user equipment, and transmitting, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to identify that a user equipment is in a lower power mode of operation, identify traffic waiting to be transmitted to the user equipment, and transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the user equipment, the traffic to the user equipment based on transmitting the non-coherent signal.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying that the user equipment may be in the higher power mode of operation based on transmitting the non-coherent signal, where transmitting the traffic may be based on transmitting the traffic to the user equipment.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the non-coherent signal to the user equipment may include operations, features, means, or instructions for transmitting the non-coherent signal via a PDCCH.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the user equipment, a control message including a second indication that the user equipment may be configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal may be based on transmitting the control message.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a set of one or more user equipment operating in the lower power mode of operation, identifying traffic waiting to be transmitted to at least one user equipment of the set of one or more user equipment, and transmitting, based on identifying the traffic, the non-coherent signal to the set of one or more user equipment while the set of one or more user equipment may be operating in the lower power mode, the non-coherent signal including a second indication for each user equipment of the set of one or more user equipment to transition from the lower power mode to the higher power mode of operation to receive the traffic.

A method of wireless communication at a user equipment is described. The method may include entering a lower power mode of operation, receiving, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identifying, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal, and activating, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication.

An apparatus for wireless communication at a user equipment is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to enter a lower power mode of operation, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal, and activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication.

Another apparatus for wireless communication at a user equipment is described. The apparatus may include means for entering a lower power mode of operation, receiving, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identifying, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal, and activating, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication.

A non-transitory computer-readable medium storing code for wireless communication at a user equipment is described. The code may include instructions executable by a processor to enter a lower power mode of operation, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal, and activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the indication to transition from the lower power mode to the higher power mode may include operations, features, means, or instructions for identifying, within the non-coherent signal, a first resource element and a second resource element, and performing one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value, where identifying the indication to transition from the lower power mode to the higher power mode may be based on the indicator value.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the non-coherent signal may include operations, features, means, or instructions for receiving the non-coherent signal via a PDCCH.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a control message including a second indication that the user equipment may be configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal may be based on transmitting the control message.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the control message including the indication that the user equipment may be configured to receive the non-coherent signal occurs prior to entering the lower power mode of operation.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, entering the lower power mode of operation may include operations, features, means, or instructions for entering an inactive period of a discontinuous reception cycle, and where entering the higher power mode of operation.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the wake-up component includes a processor, an FPGA, or an ASIC.

A method of wireless communications at a user equipment is described. The method may include a radio frequency component for receiving one or more signals from a base station, the radio frequency component configured to receive a non-coherent signal from the base station when the user equipment operates in a lower power mode, a baseband component coupled with the radio frequency component and for processing the one or more signals received from the base station, where at least a portion of the baseband component is inactive while the user equipment operates in the lower power mode, and a wake-up component coupled with the radio frequency component and the baseband component, the wake-up component for identifying an indication in the non-coherent signal that the user equipment is to transition from operating in the lower power mode to operating in a higher power mode, the wake-up component for activating the portion of the baseband component based on identifying the indication.

An apparatus for wireless communications at a user equipment is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to a radio frequency component for receiving one or more signals from a base station, the radio frequency component configured to receive a non-coherent signal from the base station when the user equipment operates in a lower power mode, a baseband component coupled with the radio frequency component and for processing the one or more signals received from the base station, where at least a portion of the baseband component is inactive while the user equipment operates in the lower power mode, and a wake-up component coupled with the radio frequency component and the baseband component, the wake-up component for identifying an indication in the non-coherent signal that the user equipment is to transition from operating in the lower power mode to operating in a higher power mode, the wake-up component for activating the portion of the baseband component based on identifying the indication.

Another apparatus for wireless communications at a user equipment is described. The apparatus may include means for a radio frequency component for receiving one or more signals from a base station, the radio frequency component configured to receive a non-coherent signal from the base station when the user equipment operates in a lower power mode, a baseband component coupled with the radio frequency component and for processing the one or more signals received from the base station, where at least a portion of the baseband component is inactive while the user equipment operates in the lower power mode, and a wake-up component coupled with the radio frequency component and the baseband component, the wake-up component for identifying an indication in the non-coherent signal that the user equipment is to transition from operating in the lower power mode to operating in a higher power mode, the wake-up component for activating the portion of the baseband component based on identifying the indication.

A non-transitory computer-readable medium storing code for wireless communications at a user equipment is described. The code may include instructions executable by a processor to a radio frequency component for receiving one or more signals from a base station, the radio frequency component configured to receive a non-coherent signal from the base station when the user equipment operates in a lower power mode, a baseband component coupled with the radio frequency component and for processing the one or more signals received from the base station, where at least a portion of the baseband component is inactive while the user equipment operates in the lower power mode, and a wake-up component coupled with the radio frequency component and the baseband component, the wake-up component for identifying an indication in the non-coherent signal that the user equipment is to transition from operating in the lower power mode to operating in a higher power mode, the wake-up component for activating the portion of the baseband component based on identifying the indication.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the wake-up component may be associated with a first power source of the user equipment that may be isolated from a second power source associated with the baseband component.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, within the non-coherent signal, a first resource element and a second resource element proceeding the first resource element, and perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value where identifying the indication to transition from the lower power mode to the higher power mode may be based on the indicator value.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a control message including a second indication that the user equipment may be configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal may be based on transmitting the control message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the wake-up component includes a processor, an FPGA, or an ASIC.

DETAILED DESCRIPTION

In some wireless communications, a user equipment (UE) may enter a lower power mode of operation (e.g., connected discontinuous reception cycle (CDRX)) in order to conserve power. During the lower power mode, the UE may operate in a “sleep and wake” cycle, in which the UE may periodically wake to monitor a physical downlink control channel (PDCCH) to identify whether there is traffic waiting to be transmitted to the UE. While monitoring the PDCCH, the UE identifies whether the PDCCH indicates that traffic is waiting to be transmitted to the UE. The UE may activate a baseband component of the UE during each wake cycle to monitor the PDCCH. Accordingly, even when no traffic is waiting to be transmitted to the UE (e.g., subframes with PDCCH only), the UE may utilize the baseband component, leading to high power consumption during the lower power mode. In some cases, higher frequency communications, such as communications in Frequency Range 2 (FR2), may use more power than lower frequency communications, such as communications in Frequency Range 1 (FR1). The higher frequency communications in FR2 use higher bandwidth monitoring during the CDRX cycles, and may use analog-to-digital (ADC) components, which may exhibit high power consumption as compared to components used in lower frequency communications (e.g., FR1). Further, the coherent signals received via the PDCCH may use more intensive signal processing to decode the signals, further increasing power consumption. Accordingly, techniques for improved wake-up signal monitoring, which may reduce complexity and power consumption may be desired.

Systems, devices, and techniques are described reduce power consumption during a lower power mode. A wireless communications system may support a non-coherent wake-up signal (WUS) to reduce UE power consumption when the UE is operating in a lower power mode of operation. Radio resource control (RRC) messages may be exchanged between the UE and a base station (e.g., eNB) in order to determine whether the UE is capable of receiving and/or decoding the non-coherent WUS. In some cases, a UE may include a wake-up component associated with a power source, which may be isolated from a power source associated with a baseband component. During a lower power mode, the wake-up component may be active (e.g., power source associated with wake-up component is active), whereas the baseband component may be inactive (e.g., power source associated with the baseband component may is inactive). The wake-up component may be configured to receive and/or decode a non-coherent WUS and determine, based on the non-coherent WUS, whether the UE is to transition from the lower power mode to a higher power mode in order to receive traffic waiting to be transmitted to the UE. The wake-up component may simplify the digital processing used to process the non-coherent WUS, thereby decreasing power consumption of the lower power mode. Furthermore, by processing the non-coherent WUS with the wake-up component, the UE may avoid activating (e.g., waking up) the more power-intensive baseband component until the non-coherent WUS indicates traffic is waiting to be transmitted to the UE.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are additionally described in the context of an example process flow, an example schematic diagram, and an example UE architecture diagram. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to non-coherent wake-up signal.

The UEs115and the base stations105of the wireless communications system100may support a non-coherent WUS which may reduce power consumption at a UE115when the UE115is operating in a lower power mode of operation. In particular, a UE115may include a wake-up component associated with a power source, which may be at least partially isolated from a power source associated with a baseband component of the UE115. In this regard, the wake-up component of the UE115may be configured to receive a non-coherent signal, perform signal processing procedures on the non-coherent signal, and identify an indication to transition to the higher power mode of operation to receive traffic without activating (e.g., waking) the more power-intensive baseband component. In some aspects, the wireless communications system100may support communications that allow the base stations105to determine whether the UEs115are capable of receiving and processing the non-coherent signals. For example, a UE115may transmit a control message (e.g., RRC message), a UE capability message, or both, to a base station105, where the control message includes an indication that the UE115is capable of receiving and processing a non-coherent signal.

In some aspects, a base station105may group one or more UEs115of the wireless communications system100into a set of UEs115that are capable of receiving a non-coherent WUS and are operating in the lower power mode of operation. In cases where the base station105identifies traffic waiting to be transmitted to at least one UE115of the set of UEs115, the base station105may transmit a non-coherent WUS to the UEs within the set of UEs115. The non-coherent WUS may include an indication for the UEs115to transition to the higher power mode of operation. The non-coherent WUS may further include an indication of a UE115associated with the traffic waiting to be transmitted. In this regard, UEs115for which the traffic is not intended may transition to a higher power mode of operation, determine that the traffic is not intended for them, and return to the lower power mode of operation. Comparatively, the UE115for which the traffic is intended may transition to a higher power mode of operation, determine that the traffic is waiting to be transmitted, and activate a baseband component of the UE115in order to receive the traffic.

These techniques may enable the UEs115of the wireless communications system100to reduce power consumption while operating in a lower power mode of operation. In particular, by processing the non-coherent WUS with a wake-up component that may be associated with a power source that is isolated from a power source associated with a baseband component, the UEs115may be able to process the non-coherent WUS without activating (e.g., waking) the more power-intensive baseband component. Moreover, digital processing used to process the non-coherent WUS may be simplified, further decreasing power consumption of the lower power mode.

FIG. 2illustrates an example of a wireless communications system200that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. In some examples, wireless communications system200may implement aspects of wireless communications system100. The wireless communications system200may include a base station105-a, a first UE115-a, and a second UE115-b, which may support communications which enable an improved non-coherent WUS.

The first UE115-amay communicate with the base station105using a first communication link205-a, and the second UE115-bmay communicate with the base station105using a second communication link205-b. In some cases, the first communication link205-aand the second communication link205-bmay include examples of an access link (e.g., a Uu link). In some cases, the first communication link205-aand the second communication link205-bmay include examples of a unicast channel between the base station105and the first UE115-aand the second UE115-b, respectively. The first communication link205-aand the second communication link205-bmay include a bi-directional link that can include both uplink and downlink communication. For example, the first UE115-amay transmit uplink transmissions215, such as uplink control signals or uplink data signals, to the base station105using the first communication link205-aand the base station105may transmit downlink transmissions, such as downlink control signals or downlink data signals, to the first UE115-ausing the first communication link205-a. By way of another example, the second UE115-bmay transmit uplink transmissions215, such as uplink control signals or uplink data signals, to the base station105using the second communication link205-band the base station105may transmit downlink transmissions, such as downlink control signals or downlink data signals, to the second UE115-busing the second communication link205-b.

The UEs115and the base stations105of the wireless communications system200may support communications which provide for a non-coherent WUS which may significantly reduce power consumption at the UEs115-aand115-b. In particular, the first UE115-aand the second UE115-bmay include wake-up components associated with a power source which is at least partially isolated from a power source associated with a baseband component of the respective UEs115-aand115-b. In this regard, the wake-up component of the UEs115-aand115-bmay be configured to receive a non-coherent signal, perform signal processing procedures on the non-coherent signal, and identify an indication to transition to the higher power mode of operation to receive traffic without activating (e.g., waking) the power-intensive baseband components.

In some aspects, a UE115may transmit a control message210to the base station105-a, where the control message210includes an indication that the UE115is configured (e.g., capable, compatible) to receive a non-coherent signal (e.g., non-coherent WUS). The control message may be an example of an RRC message, a UE capability message, or both. For example, the first UE115-amay transmit a control message210-ato the base station105-avia the communication link205-a, where the control message210-aincludes an indication that the first UE115-ais configured to receive a non-coherent signal. Similarly, by way of another example, the second UE115-bmay transmit a control message210-bto the base station105-avia the communication link205-b, where the control message210-bincludes an indication that the second UE115-bis configurable to receive a non-coherent signal. In some aspects, the UEs115may transmit the control messages210as part of a configuration procedure (e.g., random access procedure) or attachment procedure with the base station105-a. The base station105-amay determine that the UEs115are configured to receive the non-coherent signals based on the respective control messages210.

In some cases, the UEs115of the wireless communications system200may be configured to receive one or more types of WUS. For example, the UEs115of the wireless communications system200may be configured to receive a first type of WUS in addition to, or in the alternative to, the non-coherent WUS. For instance, the UEs115may be configured to receive a coherent WUS, a non-coherent WUS, or both. In some cases, the UEs115of the wireless communications system200may be configured to receive the coherent WUS in the absence of an indication to the contrary. In this regard, the coherent WUS may include a “default” WUS. Accordingly, the UEs115may be able to override the default WUS (e.g., the coherent WUS) and activate signaling using the non-coherent WUS by transmitting the control messages210to the base station105-a.

The UEs115may transition to a lower power mode of operation to conserve power. In some aspects, the lower power mode of operation may include an inactive period of a discontinuous reception cycle (DRX) (e.g., inactive period of a CDRX). During a lower power mode, wake-up components of the UEs115may be active (e.g., a first power source associated with wake-up component is active) during one or more portions of the lower power mode, whereas at least a portion of baseband components of the UEs115may be inactive (e.g., a second power source associated with the baseband component is inactive). In some cases, the UEs115may enter the lower power mode of operation after transmitting the respective control messages210. In this regard, the first UE115-amay transmit the control message210-aprior to entering the lower power mode, and the second UE115-bmay transmit the control message210-bprior to entering the lower power mode.

In some aspects, the base station105-amay identify that the first UE115-a, the second UE115-b, or both, are operating in the lower power mode of operation. The base station105-amay identify traffic waiting to be transmitted to the first UE115-a, the second UE115-b, while either of those UEs are in the lower power mode. In some aspects, the base station105-amay transmit a non-coherent signal220(e.g., non-coherent WUS220) based on identifying traffic waiting to be transmitted. Additionally or alternatively, the base station105-amay transmit the non-coherent signals220to the respective UEs115based on receiving the control messages210from the respective UEs115. The non-coherent signal220may include an indication for the respective UE115to transition from the lower power mode to a higher power mode to receive the traffic waiting to be transmitted. In some aspects, the non-coherent signals220may be conveyed (e.g., transmitted) over a PDCCH.

For example, the base station105-amay identify that the first UE115-ais operating in the lower power mode of operation, and may additionally identify traffic waiting to be transmitted to the first UE115-a. In such an example, the base station105-amay transmit a non-coherent signal220-ato the first UE115-awhile the first UE115-ais operating in the lower power mode. The non-coherent signal220-amay include an indication for the first UE115-ato transition from the lower power mode to a higher power mode to receive the traffic waiting to be transmitted. By way of another example, the base station105-amay identify that the second UE115-bis operating in the lower power mode of operation, and may additionally identify traffic waiting to be transmitted to the second UE115-b. In such an example, the base station105-amay transmit a non-coherent signal220-bto the second UE115-bwhile the second UE115-bis operating in the lower power mode. The non-coherent signal220-bmay include an indication for the second UE115-bto transition from the lower power mode to a higher power mode to receive the traffic waiting to be transmitted. In some aspects, the higher power mode of operation may include an active period of a DRX (e.g., active period of a CDRX).

In some cases, the base station105-amay transmit a non-coherent signal220on a per-UE115basis. That is, the base station105-amay transmit a non-coherent signal220to a given UE115each time the base station105-aidentifies traffic waiting to be transmitted to the given UE115. Additionally or alternatively, the base station105-amay group UEs115of the wireless communications system200into sets of two or more UEs115for the purposes of paging. For example, in some cases, the base station105-amay identify that the first UE115-aand the second UE115-bare both configured to receive non-coherent signals220, and may group the first UE115-aand the second UE115-binto a set of UEs115. In this example, the base station105-amay transmit the non-coherent signals220-aand220-bto the UEs115-aand115-b, respectively, each time the base station105-aidentifies traffic waiting to be transmitted to the first UE115-a, the second UE115-b, or both.

For example, the base station105-amay identify that the set of UEs115including the first UE115-aand the second UE115-bare operating in the lower power mode of operation. The base station105-amay subsequently identify traffic waiting to be transmitted to the first UE115-a. In this example, the base station105-amay broadcast the non-coherent signal220to the set of UEs (e.g., transmit the first non-coherent signal220-ato the first UE115-aand transmit the second non-coherent signal220-bto the second UE115-b). The base station105-amay transmit the non-coherent signals220-aand220-bto the UEs115-aand115-b, respectively, based on identifying traffic waiting to be transmitted to at least one UE115(e.g., the first UE115-a) of the set of UEs115. In some aspects, the non-coherent signals220-aand220-bmay additionally include an identifier associated with the first UE115-aindicating that the traffic is intended for the first UE115-a.

Continuing with the same example, the second UE115-b(e.g., the UE115of the set of UEs115for which the traffic is not intended) may receive the non-coherent signal220-b, identify an indication to transition to a higher power mode of operation based on the non-coherent signal220-b, and transition to the higher power mode. In this example, the second UE115-bmay determine that the traffic was not intended for the second UE115-bbased on the identifier associated with the first UE115-a, and may return (e.g., transition) to the lower power mode of operation based on determining that the traffic was not intended for the second UE115-b.

Comparatively, and continuing with the same example, the first UE115-a(e.g., the UE115of the set of UEs115for which the traffic is intended) may receive the non-coherent signal220-a, identify an indication to transition to a higher power mode of operation based on the non-coherent signal220-a, and transition to the higher power mode. In this example, the first UE115-amay determine that the traffic is intended for the first UE115-abased on the identifier associated with the first UE115-a. In this example, the first UE115-amay remain in the higher power mode in order to receive the traffic waiting to be transmitted to the first UE115-afrom the base station105-a.

In some aspects, the first UE115-amay receive the non-coherent signal220-a, and may identify the indication to transition from the lower power mode to the higher power mode with a wake-up component associated with a first power source of the first UE115-athat is isolated from a second power source associated with a baseband component of the first UE115-a. In some aspects, the wake-up component may include a processor, a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a digital signal processor (DSP), or any combination thereof.

In some aspects, the first UE115-a(e.g., the wake-up component of the first UE115-a) may identify, within the non-coherent signal220-a, a first resource element and a second resource element. The wake-up component of the first UE115-amay perform one or more differential decoding operations on the first resource element and the second resource in order to identify the indication to transition from the lower power mode to the higher power mode. For example, the wake-up component of the first UE115-amay perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value. In some aspects, the indicator value may include, but is not limited to, a logarithm likelihood ratio (LLR) value. In this example, the wake-up component may determine the indication to transition from the lower power mode to the higher power mode based on the indicator value. The wake-up component may then activate the baseband component of the first UE115-aand cause the first UE115-ato enter the higher power mode based on identifying the indication.

In some aspects, the wake-up component of the first UE115-amay be configured to perform the one or more differential decoding operations by identifying a first OFDM symbol and a second OFDM symbol within the non-coherent signal220-a. In some cases, the second OFDM symbol may immediately precede the first OFDM symbol. Upon identifying the first OFDM symbol and the second OFDM symbol, the wake-up component may remove a cyclic prefix of the respective OFDM symbols to retrieve (e.g., generate) the respective resource elements. For example, the wake-up component may remove a first cyclic prefix from the first OFDM symbol to retrieve the first resource element, and may remove a second cyclic prefix from the second OFDM symbol to retrieve the second resource element. The wake-up component of the first UE115-amay then perform the one or more differential decoding operations by multiplying the first resource element by a conjugate of the second resource element to generate the indicator value. In some cases, the second resource element may immediately precede the first resource element. In this regard, the wake-up component of the first UE115-amay be configured to perform the one or more differential decoding by multiplying the first resource element by the conjugate of its predecessor. The wake-up component may then determine the indication to transition from the lower power mode to the higher power mode based on the indicator value, and may activate the baseband component of the first UE115-aand cause the first UE115-ato enter the higher power mode based on identifying the indication.

The signal processing complexity for processing the non-coherent signals220may be reduced as compared to the processing used for some other WUSs. In particular, the signal processing of the non-coherent signal220may include a simplified de-mapper in which the first resource element is multiplied by the conjugate of its predecessor. Additionally, channel estimation may not be used for modulating or demodulating the non-coherent signal220, thereby reducing processing and memory complexity and reducing power consumption. Without channel estimation, the techniques described herein may reduce or eliminate buffering for signal processing, thereby reducing latency and power consumption. This latency reduction in PDCCH decoding may increase the efficiency of the lower power mode when no data is allocated for the UE115(e.g., when no traffic is waiting for the UE115). Furthermore, as compared to de-mapping with a coherent WUS, processing of the non-coherent signal220may not use signal equalization, further reducing power consumption at the UE115. Taken together, the techniques described herein may significantly reduce the complexity and processing used for processing the non-coherent signal220, thereby reducing power consumption at the UE115and improving the power saving efficiency of the lower power mode of operation.

FIG. 3illustrates an example of a process flow300that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. In some examples, process flow300may implement, or be implemented by, aspects of wireless communications systems100or200. For example, the process flow300may illustrate receiving a non-coherent signal while in a lower power mode of operation, identifying an indication to transition to a higher power mode of operation based on the non-coherent signal, and transitioning to the higher power mode of operation in order to receive traffic, as described with reference toFIGS. 1-2, among other aspects.

In some cases, process flow300may be related to or be performed by a UE115-c, a base station105-b, or any combination thereof, which may be examples of corresponding devices as described herein. In particular, the UE115-cand base station105-billustrated inFIG. 3may include examples of the first UE115-a, the second UE115-b, and the base station105-aillustrated inFIG. 2

At305, the UE115-cmay transmit a control message to the base station105-b, where the control message includes an indication that the UE115-cis configured (e.g., capable, compatible) to receive a non-coherent signal (e.g., non-coherent WUS). The control message may include an RRC message, a UE capability message, or both. In some aspects, the UE115-cmay transmit the control message as part of a configuration procedure (e.g., random access procedure) or attachment procedure with the base station105-b. In some aspects, the base station105-bmay determine that the UE115-cis configured to receive the non-coherent signals based on the control message received at305.

In some cases, the UE115-cmay be configured to receive one or more types of WUSs. For example, the UE115-cmay be configured to receive a first type of WUS in addition to, or in the alternate to, the non-coherent WUS. For instance, the UE115-cmay be configured to receive a coherent WUS, the non-coherent WUS, or both. In some cases, the UE115-cmay be configured to receive the coherent WUS in the absence of an indication to the contrary. In this regard, the coherent WUS may include a “default” WUS. Accordingly, the UE115-cmay be able to override the default WUS (e.g., the coherent WUS) and activate signaling using the non-coherent WUS by transmitting the control message to the base station105-cat305.

At310, the UE115-cmay enter the lower power mode of operation. The UE115-cmay enter to the lower power mode of operation in order to conserve power. In some aspects, the lower power mode of operation may include an inactive period of a DRX (e.g., inactive period of a CDRX). During the lower power mode, a wake-up component of the UE115-cmay be active (e.g., a first power source associated with wake-up component is active) or may be activated periodically, whereas a baseband component of the UE115-cmay be inactive (e.g., a second power source associated with the baseband component may is inactive). In some aspects, the UE115-cmay enter the lower power mode of operation based on, and subsequent to, transmitting the control message at305. In this regard, the UE115-cmay transmit the control message at305prior to entering the lower power mode at310.

At315, the base station105-bmay identify that the UE115-cis operating in the lower power mode of operation. In some aspects, the base station105-bmay identify that the UE115-cis operating in the lower power mode of operation based on signaling received from the UE115-c. For example, the UE115-cmay transmit one or more messages to the base station105-b, where the one or messages include an indication that the UE115-cis entering the lower power mode of operation.

At320, the base station105-bmay identify traffic waiting to be transmitted to the UE115-c. Additionally or alternatively, the base station105-bmay identify traffic waiting to be transmitted to at least one UE115of a set of UEs115which include the UE115-c. For example, in some cases, the UE115-cmay be included in a set of UEs115for the purposes of paging. In this example, at320, the base station105-bmay identify traffic waiting to be transmitted to the UE115-c, an additional UE115of the set of UEs, or both.

At325, the base station105-bmay transmit a non-coherent signal (e.g., non-coherent WUS) to the UE115-c. In some aspects, the non-coherent signal may include an indication for the UE115-cto transition from the lower power mode to a higher power mode. The non-coherent signal may additionally include an identifier associated with the UE115-c. The base station105-cmay transmit the non-coherent signal to the UE115-cwhile the UE115-cis in the lower power mode of operation. In some aspects, the base station105-cmay transmit the non-coherent signal to the UE115-cbased on identifying the UE115-cis in the lower power mode of operation at315, identifying traffic waiting to be transmitted to the UE115-cat320, or any combination thereof. The UE115-cmay receive the non-coherent signal at325via a PDCCH.

In some aspects, the base station105-bmay transmit the non-coherent signal to the UE115-ceach time the base station105-bidentifies data to be transmitted to the UE115-cwhen the UE115-cin in the lower power mode. Additionally or alternatively, the base station105-bmay transmit the non-coherent signal to a set of UEs115including the UE115-ceach time the base station105-bidentifies data to be transmitted to at least one UE115of the set of UEs115. For example, in some cases, the base station105-bmay identify that the UE115-cand an additional UE115are both configured to receive non-coherent signals, and may group the UE115-cand the additional UE115into a set of UEs115. In this example, the base station105-bmay transmit the non-coherent signals at325to the to the UE115-cand the additional UE115each time the base station105-bidentifies traffic waiting to be transmitted to the UE115-c, the additional UE115, or both.

At330, the UE115-cmay identify an indication to transition from the lower power mode to the higher power mode. In some aspects, the UE115-cmay identify the indication to transition from the lower power mode to the higher power mode based on receiving the non-coherent signal. Additionally, the UE115-cmay identify the indication to transition from the lower power mode to the higher power mode based on the indication of the identifier associated with the UE115-cwithin the non-coherent signal.

In some aspects, a wake-up component associated with a first power source of UE115-cthat is isolated from a second power source associated with a baseband component of the UE115-cmay identify the indication to transition from the lower power mode to the higher power mode based at least in part on receiving the non-coherent signal. The wake-up component may include, but is not limited to, a processor, an FPGA, an ASIC, a DSP, or any combination thereof.

In some aspects, the UE115-c(e.g., the wake-up component of the UE115-c) may identify, within the non-coherent signal, a first resource element and a second resource element. The wake-up component of the UE115-cmay perform one or more differential decoding operations on the first resource element and the second resource in order to identify the indication to transition from the lower power mode to the higher power mode. For example, the wake-up component may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value. In this example, the wake-up component may determine the indication to transition from the lower power mode to the higher power mode based on the indicator value.

At335, the UE115-cmay transition from the lower power mode of operation to the higher power mode of operation. In some aspects, the UE115-cmay transition from to the higher power mode based on receiving the non-coherent signal at325, identifying the indication to transition to the higher power mode at330, or any combination thereof. In some aspects, the wake-up component of the UE115-cmay activate the baseband component of the UE115-cand cause the UE115-cto enter the higher power mode.

At340, the UE115-cmay receive the traffic from the base station105-b. In some aspects, the UE115-cmay receive the traffic via a downlink channel (e.g., a downlink channel of a communications link205illustrated inFIG. 2). For example, the UE115-cmay receive the traffic via a physical downlink shared channel (PDSCH).

FIG. 4illustrates an example of a schematic diagram400that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. In some examples, schematic diagram400may implement aspects of wireless communications systems100or200, process flow300, or any combination thereof. The schematic diagram400may illustrate example components of a UE115-dthat is enabled to receive non-coherent signals (e.g., non-coherent WUS). For example, a UE115may include, but is not limited to, one or more radio frequency (RF) components428, one or more intermediate frequency (IF) components426, one or more front-end components424, a wake-up component440, a baseband component422, and one or more power sources442.

In some aspects, the RF component428may be coupled with the wake-up component440and the baseband component422, and may be configured to transmit and receive signals from a base station105. The baseband component422may be configured to perform one or more signal processing procedures or operations on signals received from the base station105. In some aspects, the wake-up component440may be coupled with the various components illustrated in the schematic diagram400. The wake-up component440may be associated with (e.g., coupled with) a first power source of the UE115-dthat is different than a second power source which is associated with (e.g., coupled to) the baseband component422. Additionally or alternatively, the wake-up component440and the baseband component422may be coupled to one or more power sources442, which may be configured to independently operate (e.g., power) the wake-up component440and the baseband component422separately from one another. The power source442may represent one or more separate power sources or power islands. Different components may be coupled with different power sources or power islands so that they may be operated somewhat independently. For example, the wake-up component540may be coupled with a first power source of the power sources442and the baseband component422may be coupled with a second power source of the power sources442that is different than the first power source. In such a manner, the wake-up component440may be activated or operated independently from the baseband component422.

In some aspects, the RF component428may be configured to transmit uplink transmissions (e.g., signals, messages) to a base station105, and receive downlink transmissions (e.g., signals, messages, traffic) from the base station105. The RF component428may include one or more antennas, one or more phased array antennas, other circuitry, or a combination thereof. In some aspects, the RF component428may transmit a control message (e.g., RRC message, UE capability message) to the base station105, where the control message includes an indication that the UE115-dis configured (e.g., capable, compatible) to receive a non-coherent signal (e.g., non-coherent WUS).

In some aspects, the UE115-dmay enter a lower power mode of operation. In some aspects, the UE115-dmay enter the lower power mode of operation after transmitting the control message to the base station105in order to conserve power. In some aspects, the lower power mode of operation may include an inactive period of a DRX (e.g., inactive period of a CDRX). During a lower power mode, the wake-up component440of the UE115-dmay be active (e.g., a first power source associated with wake-up component440is active), whereas at least a portion of the baseband component422of the UE115-dmay be inactive (e.g., a second power source associated with the baseband component422is inactive). In some examples, the wake-up component440may be implemented on a separate “power island” than a “power island” associated with the baseband component422. In some cases, having the wake-up component440be implemented as a separate power island may enable the UE to activate the wake-up component440without activating the baseband component422.

The RF component428may receive a non-coherent signal (e.g., non-coherent WUS) from the base station105while the UE115-dis operating in the lower power mode. In some aspects, the RF component428may receive the non-coherent signal based on transmitting the control message including the indication that the UE115-dis capable of receiving non-coherent signals. The non-coherent signal may include an indication for the UE115-dto transition from the lower power mode to a higher power mode. The non-coherent signal may further include an indicator associated with the UE115-dindicating that traffic waiting to be transmitted is intended for the UE115-d.

In some aspects, the non-coherent signal received by the RF component428may be shifted to an intermediate frequency by the IF component426. In some aspects, the RF component428and the IF component426may provide reduced integrated phase noise requirements in the context of non-coherent signals as compared to receiving other types of signals (e.g., coherent WUS). Moreover, the RF component428and the IF component of the UE115-dmay exhibit reduced linearity requirements, as well as reduced anti-aliasing filtering (AAF) selectivity as compared to other UE115configurations for receiving other types of signals (e.g., coherent WUS). The front-end components424may perform one or more signal processing operations on the received non-coherent signal. The front-end components424may include any signal processing components including, but not limited to, filters (e.g., spur filters, decimation filters), amplifiers, mixers, phase shifters, ADC components, other circuitry or components, or any combination thereof.

While operating in the lower power mode of operation, the wake-up component440may receive the non-coherent signal after it is processed by the RF component428, the IF component426, and the front-end components424, and may identify an indication to transition from the lower power mode to the higher power mode based on the non-coherent signal. In some aspects, the wake-up component440of the UE115-dmay identify, within the non-coherent signal, a first resource element and a second resource element. The wake-up component440may perform one or more differential decoding operations on the first resource element and the second resource in order to identify the indication to transition from the lower power mode to the higher power mode. For example, the wake-up component440may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value. In some aspects, the indicator value may include, but is not limited to, an LLR value. In this example, the wake-up component440may determine the indication to transition from the lower power mode to the higher power mode based on the indicator value. The wake-up component440may then activate at least a portion of the baseband component422of the UE115-dand cause the first UE115-dto enter the higher power mode based on identifying the indication.

In some aspects, the wake-up component440may be configured to perform the one or more differential decoding operations by identifying a first OFDM symbol and a second OFDM symbol within the non-coherent signal. In some cases, the second OFDM symbol may immediately precede the first OFDM symbol. Upon identifying the first OFDM symbol and the second OFDM symbol, the wake-up component440may remove a cyclic prefix of the respective OFDM symbols to retrieve (e.g., generate) the respective resource elements. For example, the wake-up component440may remove a first cyclic prefix from the first OFDM symbol to retrieve the first resource element, and may remove a second cyclic prefix from the second OFDM symbol to retrieve the second resource element. The wake-up component440may then perform the one or more differential decoding operations by multiplying the first resource element by a conjugate of the second resource element to generate the indicator value. In some cases, the second resource element may immediately precede the first resource element. In this regard, the wake-up component440may be configured to perform the one or more differential decoding by multiplying the first resource element by the conjugate of its predecessor. The wake-up component440may then determine the indication to transition from the lower power mode to the higher power mode based on the indicator value, and may activate at least a portion of the baseband component422of the UE115-dand cause the first UE115-dto enter the higher power mode based on identifying the indication.

Upon transitioning to the higher power mode and activating at least a portion of the baseband component422, the RF component428may receive traffic which may be waiting to be transmitted to the UE115-dfrom the base station105. In this regard, the UE115-dmay receive a downlink transmission (e.g., downlink signal, downlink message) including the traffic. The downlink transmission including the traffic may be received by the RF component428, and shifted to an intermediate frequency for processing and handling by the IF component426. In some cases, the front-end components424may perform one or more signal processing operations on the received downlink transmission. Subsequently, the baseband component422may receive the downlink transmission including the traffic, and perform one or more signal processing procedures or operations on the downlink transmission.

The techniques and configuration of the UE115-dillustrated by the schematic diagram400may significantly reduce the complexity used to process the non-coherent signals, as compared to the processing used for some other WUS. In particular, the signal processing of the non-coherent signal may include a simplified de-mapper in which the first resource element is multiplied by the conjugate of its predecessor. Additionally, channel estimation may not be required for modulating or demodulating the non-coherent signal, thereby reducing processing and memory complexity and reducing power consumption. Without channel estimation, the techniques described herein may reduce or eliminate buffering used for signal processing, thereby reducing latency and power consumption. This latency reduction in PDCCH decoding may increase the efficiency of the lower power mode when no data is allocated for the UE115-d(e.g., when no traffic is waiting for the UE115-d). Furthermore, as compared to de-mapping with a coherent WUS, processing of the non-coherent signal may not use signal equalization, further reducing power consumption at the UE115-d. Taken together, the techniques described herein may significantly reduce the complexity and processing used for processing the non-coherent signal, thereby reducing power consumption at the UE115-dand improving the power saving efficiency of the lower power mode of operation.

FIG. 5illustrates an example of an architecture diagram500that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. In some examples, architecture diagram500may implement aspects of wireless communications systems100or200, process flow300, schematic diagram400, or any combination thereof. In some aspects, diagram500may be an example of the transmitting device (e.g., a first wireless device, UE115, or base station105) and/or a receiving device (e.g., a second wireless device, UE115, or base station105) as described herein. For example, the architecture diagram500illustrated inFIG. 5may illustrate an example architecture of a UE115which is enabled to receive and process non-coherent signals (e.g., non-coherent WUS).

Broadly,FIG. 5is a diagram illustrating example hardware components of a wireless device in accordance with certain aspects of the disclosure. The illustrated components may include those that may be used for antenna element selection and/or for beamforming for transmission of wireless signals. There are numerous architectures for antenna element selection and implementing phase shifting, only one example of which is illustrated here. The architecture diagram500includes a modem (modulator/demodulator)502, a digital to analog converter (DAC)504, a first mixer506, a second mixer508, and a splitter510. The architecture diagram500also includes a plurality of first amplifiers512, a plurality of phase shifters514, a plurality of second amplifiers516, and an antenna array518that includes a plurality of antenna elements520. Transmission lines or other waveguides, wires, traces, or the like are shown connecting the various components to illustrate how signals to be transmitted may travel between components. Boxes522,524,526, and528indicate regions in the architecture diagram500in which different types of signals travel or are processed. Specifically, box522indicates a region in which digital baseband signals travel or are processed, box524indicates a region in which analog baseband signals travel or are processed, box526indicates a region in which analog IF signals travel or are processed, and box528indicates a region in which analog RF signals travel or are processed. The architecture also includes a local oscillator530, a local oscillator532, and a communications manager534.

In some aspects, the box528may illustrate an example configuration of the RF component428shown and described inFIG. 4. Similarly, the box526may illustrate an example configuration of the IF component426, the box524may illustrate an example configuration of the front-end components424, and the wake-up component540may be an example of the wake-up component440, and the box522may illustrate an example configuration of the baseband component422or the baseband component422may be part of the components that are illustrated by box522, as shown and described with reference toFIG. 4.

Each of the antenna elements520may include one or more sub-elements (not shown) for radiating or receiving RF signals. For example, a single antenna element520may include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals. The antenna elements520may include patch antennas or other types of antennas arranged in a linear, two dimensional, or other pattern. A spacing between antenna elements520may be such that signals with a desired wavelength transmitted separately by the antenna elements520may interact or interfere (e.g., to form a desired beam). For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, half wavelength, or other fraction of a wavelength of spacing between neighboring antenna elements520to allow for interaction or interference of signals transmitted by the separate antenna elements520within that expected range.

The modem502processes and generates digital baseband signals and may also control operation of the DAC504, first and second mixers506,508, splitter510, first amplifiers512, phase shifters514, and/or the second amplifiers516to transmit signals via one or more or all of the antenna elements520. The modem502may process signals and control operation in accordance with a communication standard such as a wireless standard discussed herein. The DAC504may convert digital baseband signals received from the modem502(and that are to be transmitted) into analog baseband signals. The first mixer506upconverts analog baseband signals to analog IF signals within an IF using a local oscillator A530. For example, the first mixer506may mix the signals with an oscillating signal generated by the local oscillator A530to “move” the baseband analog signals to the IF. In some cases, some processing or filtering (not shown) may take place at the IF. The second mixer508upconverts the analog IF signals to analog RF signals using the local oscillator B532. Similarly to the first mixer, the second mixer508may mix the signals with an oscillating signal generated by the local oscillator532to “move” the IF analog signals to the RF, or the frequency at which signals will be transmitted or received. The modem502and/or the communications manager534may adjust the frequency of local oscillator A530and/or the local oscillator532so that a desired IF and/or RF frequency is produced and used to facilitate processing and transmission of a signal within a desired bandwidth.

In the illustrated architecture diagram500, signals upconverted by the second mixer508are split or duplicated into multiple signals by the splitter510. The splitter510in architecture diagram500splits the RF signal into a plurality of identical or nearly identical RF signals, as denoted by its presence in box528. In other examples, the split may take place with any type of signal including with baseband digital, baseband analog, or IF analog signals. Each of these signals may correspond to an antenna element520and the signal travels through and is processed by amplifiers512,516, phase shifters514, and/or other elements corresponding to the respective antenna element520to be provided to and transmitted by the corresponding antenna element520of the antenna array518. In one example, the splitter510may be an active splitter that is connected to a power supply and provides some gain so that RF signals exiting the splitter510are at a power level equal to or greater than the signal entering the splitter510. In another example, the splitter510is a passive splitter that is not connected to power supply and the RF signals exiting the splitter510may be at a power level lower than the RF signal entering the splitter510.

After being split by the splitter510, the resulting RF signals may enter an amplifier, such as a first amplifier512, or a phase shifter514corresponding to an antenna element520. The first and second amplifiers512,516are illustrated with dashed lines because one or both of them might not be necessary in some implementations. In one implementation, both the first amplifier512and second amplifier516are present. In another, neither the first amplifier512nor the second amplifier516is present. In other implementations, one of the two amplifiers512,516is present but not the other. By way of example, if the splitter510is an active splitter, the first amplifier512may not be used. By way of further example, if the phase shifter514is an active phase shifter that can provide a gain, the second amplifier516might not be used. The amplifiers512,516may provide a desired level of positive or negative gain. A positive gain (positive dB) may be used to increase an amplitude of a signal for radiation by a specific antenna element520. A negative gain (negative dB) may be used to decrease an amplitude and/or suppress radiation of the signal by a specific antenna element. Each of the amplifiers512,516may be controlled independently (e.g., by the modem502or the communications manager534) to provide independent control of the gain for each antenna element520. For example, the modem502and/or the communications manager534may have at least one control line connected to each of the splitter510, first amplifiers512, phase shifters514, and/or second amplifiers516which may be used to configure a gain to provide a desired amount of gain for each component and thus each antenna element520.

The phase shifter514may provide a configurable phase shift or phase offset to a corresponding RF signal to be transmitted. The phase shifter514could be a passive phase shifter not directly connected to a power supply. Passive phase shifters might introduce some insertion loss. The second amplifier516could boost the signal to compensate for the insertion loss. The phase shifter514could be an active phase shifter connected to a power supply such that the active phase shifter provides some amount of gain or prevents insertion loss. The settings of each of the phase shifters514are independent meaning that each can be set to provide a desired amount of phase shift or the same amount of phase shift or some other configuration. The modem502and/or the communications manager534may have at least one control line connected to each of the phase shifters514and which may be used to configure the phase shifters514to provide a desired amounts of phase shift or phase offset between antenna elements520.

The architecture diagram500is given by way of example only to illustrate an architecture for transmitting and/or receiving signals. It will be understood that the architecture diagram500and/or each portion of the architecture diagram500may be repeated multiple times within an architecture to accommodate or provide an arbitrary quantity of RF chains, antenna elements, and/or antenna panels. Furthermore, numerous alternate architectures are possible and contemplated. For example, although only a single antenna array518is shown, two, three, or more antenna arrays may be included each with one or more of their own corresponding amplifiers, phase shifters, splitters, mixers, DACs, ADCs, and/or modems. For example, a single UE may include two, four or more antenna arrays for transmitting or receiving signals at different physical locations on the UE or in different directions. Furthermore, mixers, splitters, amplifiers, phase shifters and other components may be located in different signal type areas (e.g., different ones of the boxes522,524,526,528) in different implemented architectures. For example, a split of the signal to be transmitted into a plurality of signals may take place at the analog RF, analog IF, analog baseband, or digital baseband frequencies in different examples. Similarly, amplification, and/or phase shifts may also take place at different frequencies. For example, in some contemplated implementations, one or more of the splitter510, amplifiers512,516, or phase shifters514may be located between the DAC504and the first mixer506or between the first mixer506and the second mixer508. In one example, the functions of one or more of the components may be combined into one component. For example, the phase shifters514may perform amplification to include or replace the first and/or or second amplifiers512,516. By way of another example, a phase shift may be implemented by the second mixer508to reduce or eliminate the need for a separate phase shifter514. This technique is sometimes called local oscillator (LO) phase shifting. In one implementation of this configuration, there may be a plurality of IF to RF mixers (e.g., for each antenna element chain) within the second mixer508and the local oscillator532would supply different local oscillator signals (with different phase offsets) to each IF to RF mixer.

The modem502and/or the communications manager534may control one or more of the other components of the architecture diagram500to select one or more antenna elements520and/or to form beams for transmission of one or more signals. For example, the antenna elements520may be individually selected or deselected for transmission of a signal (or signals) by controlling an amplitude of one or more corresponding amplifiers, such as the first amplifiers512and/or the second amplifiers516. Beamforming includes generation of a beam using a plurality of signals on different antenna elements where one or more or all of the plurality signals are shifted in phase relative to each other. The formed beam may carry physical or higher layer reference signals or information. As each signal of the plurality of signals is radiated from a respective antenna element520, the radiated signals interact, interfere (constructive and destructive interference), and amplify each other to form a resulting beam. The shape (such as the amplitude, width, and/or presence of side lobes) and the direction (such as an angle of the beam relative to a surface of the antenna array518) can be dynamically controlled by modifying the phase shifts or phase offsets imparted by the phase shifters514and amplitudes imparted by the amplifiers512,516of the plurality of signals relative to each other.

The communications manager534may, when architecture diagram500is configured as a receiving device, transmit a first beam measurement report to a first wireless device, the first beam measurement report indicating a first set of beam measurements for a wireless channel between the first wireless device and the second wireless device. The communications manager534may receive from the first wireless device a cluster validity metric for at least one beam in the first beam measurement report. The communications manager534may transmit to the first wireless device a second beam measurement report based at least in part on the cluster validity metric, the second beam measurement report indicating a second set of beam measurements for the wireless channel, as discussed herein. The communications manager534may, when architecture diagram500is configured as a transmitting device, receive a first beam measurement report from a second wireless device, the first beam measurement report indicating a first set of beam measurements for a wireless channel between the first wireless device and the second wireless device. The communications manager534may transmit to the second wireless device a cluster validity metric for at least one beam in the first beam measurement report. The communications manager534may receive from the second wireless device, in response to transmitting the cluster validity metric, a second beam measurement report indicating a second set of beam measurements for the wireless channel. The communications manager534may select a beam for transmitting to the second wireless device based at least in part on the first and second beam measurement reports, as discussed herein. The communications manager534may be located partially or fully within one or more other components of the architecture diagram500. For example, the communications manager534may be located within the modem502in at least one implementation.

FIG. 6shows a block diagram600of a device605that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The device605may be an example of aspects of a UE115as described herein. The device605may include a receiver610, a communications manager615, and a transmitter620. The device605may also include a processor. The communications manager615may include an example of the communications manager534illustrated inFIG. 5. Conversely, the communications manager534illustrated inFIG. 5may include an example of the communications manager615illustrated inFIG. 6. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager615may enter a lower power mode of operation, enter the higher power mode based on identifying the indication, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, and identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. The communications manager615may also enter a lower power mode of operation. The communications manager615may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The communications manager615may identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal. The communications manager615may activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication. The communications manager615may be an example of aspects of the communications manager910described herein.

The actions performed by the communications manager615as described herein may be implemented to realize one or more potential advantages. For example, receiving and processing a non-coherent signal (e.g., non-coherent WUS) a UE115may reduce the complexity used for processing the WUS as compared to other types of WUS, thereby significantly reducing power consumption at the UE115and improving the power saving efficiency of the lower power mode of operation.

Based on receiving and processing a non-coherent signal, a processor of the UE115(e.g., a processor controlling the receiver610, the communications manager615, the transmitter620, etc.) may reduce processing resources used for processing the non-coherent signal as compared to the processing resources used for processing other types of WUS. For example, processing the non-coherent signal may not use channel estimation, signal equalization, or both, thereby reducing processing and memory complexity, reducing latency, and reducing power consumption at the UE115.

The transmitter620may transmit signals generated by other components of the device605. In some examples, the transmitter620may be collocated with a receiver610in a transceiver component. For example, the transmitter620may be an example of aspects of the transceiver920described with reference toFIG. 9. The transmitter620may utilize a single antenna or a set of antennas.

The communications manager715may be an example of aspects of the communications manager615as described herein. The communications manager715may include a power manager720, a non-coherent signal receiver725, a wake-up manager730, a RF manager735, and a baseband manager740. The communications manager715may be an example of aspects of the communications manager910described herein.

The power manager720may enter a lower power mode of operation. The non-coherent signal receiver725may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The wake-up manager730may identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. In particular, the wake-up manager730may identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation.

The power manager720may enter a lower power mode of operation. In some cases, the power manager720may and enter the higher power mode based on identifying the indication to transition from the lower power mode to the higher power mode.

The RF manager735may receive signals from a base station. In some cases, RF manager735may receive a non-coherent signal from the base station when the user equipment operates in a lower power mode.

The baseband manager740may process the one or more signals received from the base station. In some cases, the baseband manager740may cause at least a portion of the baseband component to be inactive while the user equipment operates in the lower power mode.

The transmitter745may transmit signals generated by other components of the device705. In some examples, the transmitter745may be collocated with a receiver710in a transceiver component. For example, the transmitter745may be an example of aspects of the transceiver920described with reference toFIG. 9. The transmitter745may utilize a single antenna or a set of antennas.

FIG. 8shows a block diagram800of a communications manager805that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The communications manager805may be an example of aspects of a communications manager615, a communications manager715, or a communications manager910described herein. The communications manager805may include a power manager810, a non-coherent signal receiver815, a wake-up manager820, a resource element manager825, a differential decoding manager830, an OFDM symbol manager835, a cyclic prefix manager840, a PDCCH receiver845, a control message transmitter850, a CDRX manager855, a RF manager860, and a baseband manager865. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The control message transmitter850may transmit a control message including a second indication that the user equipment is configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal is based on transmitting the control message. In some examples, the control message transmitter850may transmit the control message including the indication that the user equipment is configured to receive the non-coherent signal occurs prior to entering the lower power mode of operation. In some examples, the control message transmitter850may transmit a control message including a second indication that the user equipment is configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal is based on transmitting the control message. In some examples, the control message transmitter850may transmit the control message including the indication that the user equipment is configured to receive the non-coherent signal occurs prior to entering the lower power mode of operation. In some examples, the control message transmitter850may transmit a control message including a second indication that the user equipment is configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal is based on transmitting the control message.

The power manager810may enter a lower power mode of operation. The non-coherent signal receiver815may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. In some examples, the non-coherent signal receiver815may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode.

The PDCCH receiver845may receive the non-coherent signal includes receiving the non-coherent signal via a PDCCH. In some cases, the non-coherent signal is conveyed over a PDCCH.

The wake-up manager820may identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. In some examples, the wake-up manager820may identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal. In some examples, the wake-up manager820may activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication. In some examples, the wake-up manager820may identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, the indication to transition from the lower power mode to the higher power mode based on receiving the non-coherent signal. In some examples, the power manager810may enter the higher power mode based on identifying the indication.

The RF manager860may receive signals from a base station. In some cases, RF manager860may receive a non-coherent signal from the base station when the user equipment operates in a lower power mode.

The baseband manager865may process the one or more signals received from the base station. In some cases, the baseband manager865may cause at least a portion of the baseband component to be inactive while the user equipment operates in the lower power mode.

The resource element manager825may identify, within the non-coherent signal, a first resource element and a second resource element. In some examples, the resource element manager825may identify, within the non-coherent signal, a first resource element and a second resource element. In some examples, the resource element manager825may identify, within the non-coherent signal, a first resource element and a second resource element preceding the first resource element.

The differential decoding manager830may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value, where identifying the indication to transition from the lower power mode to the higher power mode is based on the indicator value. In some examples, the differential decoding manager830may multiply the first resource element by a conjugate of the second resource element, where performing the one or more differential decoding operations is based on multiplying the first resource element by the conjugate of the second resource element. In some examples, the differential decoding manager830may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value, where identifying the indication to transition from the lower power mode to the higher power mode is based on the indicator value.

In some examples, the differential decoding manager830may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value where identifying the indication to transition from the lower power mode to the higher power mode is based on the indicator value. In some cases, the indicator value includes an LLR value. In some cases, the second resource element immediately precedes the first resource element.

The OFDM symbol manager835may identify an orthogonal frequency division multiplexing (OFDM) symbol within the non-coherent signal. The cyclic prefix manager840may remove a cyclic prefix from the OFDM symbol to retrieve the first resource element, where identifying the first resource element is based on removing the cyclic prefix from the OFDM symbol.

The CDRX manager855may enter the lower power mode of operation includes entering an inactive period of a discontinuous reception cycle, and where entering the higher power mode of operation includes entering an active period of the discontinuous reception cycle. In some cases, the lower power mode of operation includes an inactive period of a discontinuous reception cycle. In some cases, the higher power mode of operation includes an active period of the discontinuous reception cycle.

FIG. 9shows a diagram of a system900including a device905that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The device905may be an example of or include the components of device605, device705, or a UE115as described herein. The device905may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager910, an I/O controller915, a transceiver920, an antenna925, memory930, and a processor940. These components may be in electronic communication via one or more buses (e.g., bus945).

The communications manager910may enter a lower power mode of operation, enter the higher power mode based on identifying the indication, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, and identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. The communications manager910may also enter a lower power mode of operation, receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode, identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal, and activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication. in some cases, a radio frequency component for receiving one or more signals from a base station, the radio frequency component configured to receive a non-coherent signal from the base station when the user equipment operates in a lower power mode in some cases, a baseband component coupled with the radio frequency component and for processing the one or more signals received from the base station, where at least a portion of the baseband component is inactive while the user equipment operates in the lower power mode in some cases, a wake-up component coupled with the radio frequency component and the baseband component, the wake-up component for identifying an indication in the non-coherent signal that the user equipment is to transition from operating in the lower power mode to operating in a higher power mode, the wake-up component for activating the portion of the baseband component based on identifying the indication

The receiver1010may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to non-coherent wake-up signal, etc.). Information may be passed on to other components of the device1005. The receiver1010may be an example of aspects of the transceiver1320described with reference toFIG. 13. The receiver1010may utilize a single antenna or a set of antennas.

The communications manager1015may identify that a user equipment is in a lower power mode of operation, identify traffic waiting to be transmitted to the user equipment, and transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic. The communications manager1015may be an example of aspects of the communications manager1310described herein.

The actions performed by the communications manager1310as described herein may be implemented to realize one or more potential advantages. For example, transmitting a non-coherent signal (e.g., non-coherent WUS) to a UE115may enable the UE115to reduce the complexity used for processing the WUS as compared to other types of WUS, thereby significantly reducing power consumption at the UE115and improving the power saving efficiency of the lower power mode of operation.

The communications manager1115may be an example of aspects of the communications manager1015as described herein. The communications manager1115may include a power manager1120, a traffic manager1125, and a non-coherent signal transmitter1130. The communications manager1115may be an example of aspects of the communications manager1310described herein.

The power manager1120may identify that a user equipment is in a lower power mode of operation.

The traffic manager1125may identify traffic waiting to be transmitted to the user equipment.

The non-coherent signal transmitter1130may transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

The transmitter1135may transmit signals generated by other components of the device1105. In some examples, the transmitter1135may be collocated with a receiver1110in a transceiver component. For example, the transmitter1135may be an example of aspects of the transceiver1320described with reference toFIG. 13. The transmitter1135may utilize a single antenna or a set of antennas.

FIG. 12shows a block diagram1200of a communications manager1205that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The communications manager1205may be an example of aspects of a communications manager1015, a communications manager1115, or a communications manager1310described herein. The communications manager1205may include a power manager1210, a traffic manager1215, a non-coherent signal transmitter1220, a traffic transmitter1225, a PDCCH transmitter1230, and a control message receiver1235. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The power manager1210may identify that a user equipment is in a lower power mode of operation. In some examples, the power manager1210may identify a set of one or more user equipment operating in the lower power mode of operation.

The traffic manager1215may identify traffic waiting to be transmitted to the user equipment. In some examples, the traffic manager1215may identify traffic waiting to be transmitted to at least one user equipment of the set of one or more user equipment.

The non-coherent signal transmitter1220may transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic. In some examples, the non-coherent signal transmitter1220may identify that the user equipment is in the higher power mode of operation based on transmitting the non-coherent signal, where transmitting the traffic is based on transmitting the traffic to the user equipment.

In some examples, the non-coherent signal transmitter1220may transmit, based on identifying the traffic, the non-coherent signal to the set of one or more user equipment while the set of one or more user equipment is operating in the lower power mode, the non-coherent signal including a second indication for each user equipment of the set of one or more user equipment to transition from the lower power mode to the higher power mode of operation to receive the traffic.

The traffic transmitter1225may transmit, to the user equipment, the traffic to the user equipment based on transmitting the non-coherent signal.

The PDCCH transmitter1230may transmit the non-coherent signal to the user equipment includes transmitting the non-coherent signal via a PDCCH.

The control message receiver1235may receive, from the user equipment, a control message including a second indication that the user equipment is configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal is based on transmitting the control message.

FIG. 13shows a diagram of a system1300including a device1305that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The device1305may be an example of or include the components of device1005, device1105, or a base station105as described herein. The device1305may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager1310, a network communications manager1315, a transceiver1320, an antenna1325, memory1330, a processor1340, and an inter-station communications manager1345. These components may be in electronic communication via one or more buses (e.g., bus1350).

The communications manager1310may identify that a user equipment is in a lower power mode of operation, identify traffic waiting to be transmitted to the user equipment, and transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic.

The memory1330may include RAM, ROM, or a combination thereof. The memory1330may store computer-readable code1335including instructions that, when executed by a processor (e.g., the processor1340) cause the device to perform various functions described herein. In some cases, the memory1330may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

FIG. 14shows a flowchart illustrating a method1400that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The operations of method1400may be implemented by a UE115or its components as described herein. For example, the operations of method1400may be performed by a communications manager as described with reference toFIGS. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1405, the UE may enter a lower power mode of operation. The operations of1405may be performed according to the methods described herein. In some examples, aspects of the operations of1405may be performed by a power manager as described with reference toFIGS. 6 through 9.

At1410, the UE may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The operations of1410may be performed according to the methods described herein. In some examples, aspects of the operations of1410may be performed by a non-coherent signal receiver as described with reference toFIGS. 6 through 9.

At1415, the UE may identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. The operations of1415may be performed according to the methods described herein. In some examples, aspects of the operations of1415may be performed by a wake-up manager as described with reference toFIGS. 6 through 9.

At1420, the UE may enter the higher power mode based on identifying the indication. The operations of1420may be performed according to the methods described herein. In some examples, aspects of the operations of1420may be performed by a power manager as described with reference toFIGS. 6 through 9.

FIG. 15shows a flowchart illustrating a method1500that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The operations of method1500may be implemented by a UE115or its components as described herein. For example, the operations of method1500may be performed by a communications manager as described with reference toFIGS. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1505, the UE may enter a lower power mode of operation. The operations of1505may be performed according to the methods described herein. In some examples, aspects of the operations of1505may be performed by a power manager as described with reference toFIGS. 6 through 9.

At1510, the UE may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The operations of1510may be performed according to the methods described herein. In some examples, aspects of the operations of1510may be performed by a non-coherent signal receiver as described with reference toFIGS. 6 through 9.

At1515, the UE may identify, within the non-coherent signal, a first resource element and a second resource element. The operations of1515may be performed according to the methods described herein. In some examples, aspects of the operations of1515may be performed by a resource element manager as described with reference toFIGS. 6 through 9.

At1520, the UE may perform one or more differential decoding operations on the first resource element and the second resource element to generate an indicator value, where identifying the indication to transition from the lower power mode to the higher power mode is based on the indicator value. The operations of1520may be performed according to the methods described herein. In some examples, aspects of the operations of1520may be performed by a differential decoding manager as described with reference toFIGS. 6 through 9.

At1525, the UE may identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. The operations of1525may be performed according to the methods described herein. In some examples, aspects of the operations of1525may be performed by a wake-up manager as described with reference toFIGS. 6 through 9.

At1530, the UE may enter the higher power mode based on identifying the indication. The operations of1530may be performed according to the methods described herein. In some examples, aspects of the operations of1530may be performed by a power manager as described with reference toFIGS. 6 through 9.

FIG. 16shows a flowchart illustrating a method1600that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The operations of method1600may be implemented by a UE115or its components as described herein. For example, the operations of method1600may be performed by a communications manager as described with reference toFIGS. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1605, the UE may transmit a control message including a second indication that the user equipment is configured to receive the non-coherent signal as part of a configuration procedure, where receiving the non-coherent signal is based on transmitting the control message. The operations of1605may be performed according to the methods described herein. In some examples, aspects of the operations of1605may be performed by a control message transmitter as described with reference toFIGS. 6 through 9.

At1610, the UE may enter a lower power mode of operation. The operations of1610may be performed according to the methods described herein. In some examples, aspects of the operations of1610may be performed by a power manager as described with reference toFIGS. 6 through 9.

At1615, the UE may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The operations of1615may be performed according to the methods described herein. In some examples, aspects of the operations of1615may be performed by a non-coherent signal receiver as described with reference toFIGS. 6 through 9.

At1620, the UE may identify, based on receiving the non-coherent signal, an indication to transition from the lower power mode to a higher power mode of operation. The operations of1620may be performed according to the methods described herein. In some examples, aspects of the operations of1620may be performed by a wake-up manager as described with reference toFIGS. 6 through 9.

At1625, the UE may enter the higher power mode based on identifying the indication. The operations of1625may be performed according to the methods described herein. In some examples, aspects of the operations of1625may be performed by a power manager as described with reference toFIGS. 6 through 9.

FIG. 17shows a flowchart illustrating a method1700that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The operations of method1700may be implemented by a base station105or its components as described herein. For example, the operations of method1700may be performed by a communications manager as described with reference toFIGS. 10 through 13. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At1705, the base station may identify that a user equipment is in a lower power mode of operation. The operations of1705may be performed according to the methods described herein. In some examples, aspects of the operations of1705may be performed by a power manager as described with reference toFIGS. 10 through 13.

At1710, the base station may identify traffic waiting to be transmitted to the user equipment. The operations of1710may be performed according to the methods described herein. In some examples, aspects of the operations of1710may be performed by a traffic manager as described with reference toFIGS. 10 through 13.

At1715, the base station may transmit, based on identifying the traffic, a non-coherent signal to the user equipment while the user equipment is operating in the lower power mode, the non-coherent signal including an indication for the user equipment to transition from the lower power mode to a higher power mode of operation to receive the traffic. The operations of1715may be performed according to the methods described herein. In some examples, aspects of the operations of1715may be performed by a non-coherent signal transmitter as described with reference toFIGS. 10 through 13.

At1805, the base station may identify a set of one or more user equipment operating in the lower power mode of operation. The operations of1805may be performed according to the methods described herein. In some examples, aspects of the operations of1805may be performed by a power manager as described with reference toFIGS. 10 through 13.

At1810, the base station may identify traffic waiting to be transmitted to at least one user equipment of the set of one or more user equipment. The operations of1810may be performed according to the methods described herein. In some examples, aspects of the operations of1810may be performed by a traffic manager as described with reference toFIGS. 10 through 13.

At1815, the base station may transmit, based on identifying the traffic, the non-coherent signal to the set of one or more user equipment while the set of one or more user equipment is operating in the lower power mode, the non-coherent signal including a second indication for each user equipment of the set of one or more user equipment to transition from the lower power mode to the higher power mode of operation to receive the traffic. The operations of1815may be performed according to the methods described herein. In some examples, aspects of the operations of1815may be performed by a non-coherent signal transmitter as described with reference toFIGS. 10 through 13.

FIG. 19shows a flowchart illustrating a method1900that supports non-coherent wake-up signal in accordance with aspects of the present disclosure. The operations of method1900may be implemented by a UE115or its components as described herein. For example, the operations of method1900may be performed by a communications manager as described with reference toFIGS. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At1905, the UE may enter a lower power mode of operation. The operations of1905may be performed according to the methods described herein. In some examples, aspects of the operations of1905may be performed by a power manager as described with reference toFIGS. 6 through 9.

At1910, the UE may receive, from a base station, a non-coherent signal while the user equipment is operating in the lower power mode. The operations of1910may be performed according to the methods described herein. In some examples, aspects of the operations of1910may be performed by a non-coherent signal receiver as described with reference toFIGS. 6 through 9.

At1915, the UE may identify, with a wake-up component associated with a first power source of the user equipment that is isolated from a second power source associated with a baseband component, an indication to transition from operating in the lower power mode to a higher power mode of operation, where the indication to transition from the lower power mode is based on receiving the non-coherent signal. The operations of1915may be performed according to the methods described herein. In some examples, aspects of the operations of1915may be performed by a wake-up manager as described with reference toFIGS. 6 through 9.

At1920, the UE may activate, with the wake-up component, the baseband component and causing the user equipment to enter the higher power mode based on identifying the indication. The operations of1920may be performed according to the methods described herein. In some examples, aspects of the operations of1920may be performed by a wake-up manager as described with reference toFIGS. 6 through 9.