Low power wake-up radio in sidelink communications

Abstract

Methods, systems, and devices for wireless communication are described. Techniques described herein relate to a network entity indicating a configuration for a user equipment (UE) for wake-up radio signaling when a primary radio of the UE is in sleep mode. The UE may monitor and receive a wake-up signal, a low-power reference signal, or a low-power synchronization signal from a second UE using the wake-up radio according to the configuration. If the UE receives a wake-up signal from the second UE, the UE may establish communication with the second UE or with the network entity based on the wake-up signal.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 955,339, entitled “LOW POWER WAKEUP RADIO IN SIDELINK COMMUNICATIONS,” filed by Elshafie et al. on September 28, 2022, which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications, including low power wake-up radio in sidelink communications. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communication for a communication device, which may be referred to as a user equipment (UE). Summary of the invention

[0005] The described technology relates to improved methods, systems, devices and apparatuses for supporting low-power wake-up radio in sidelink communications. For example, the described technology provides a configuration for wake-up radio signaling when a primary radio of a user equipment (UE) is in sleep mode. The UE can use the wake-up radio to monitor and receive a wake-up signal from a second UE according to the configuration. If the UE receives a wake-up signal from the second UE, the UE can establish communication with the second UE or with the network entity based on the wake-up signal.

[0006] A method for wireless communication at a first user equipment (UE) is described. The method may include: receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; and receiving a signal from a second UE via the wake-up radio via the set of sidelink communication resources according to the configuration when the first radio is in the sleep mode.

[0007] An apparatus for wireless communication at a first UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: receive control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; and receive a signal from a second UE via the wake-up radio via the sidelink communication resource set according to the configuration when the first radio is in the sleep mode.

[0008] Another apparatus for wireless communication at a first UE is described. The apparatus may include: means for receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; and means for receiving a signal from a second UE via the wake-up radio via the set of sidelink communication resources according to the configuration when the first radio is in the sleep mode.

[0009] A non-transitory computer-readable medium storing code for wireless communication at a first UE is described. The code may include instructions executable by a processor to: receive control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; and receive a signal from a second UE via the wake-up radio via the sidelink communication resource set according to the configuration when the first radio is in the sleep mode.

[0010] Some examples of the methods, devices, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for communicating with one of the network entity or the second UE via the first radio based on receiving the signal via the wake-up radio, wherein the signal includes a wake-up signal.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs, and wherein communicating with one of the network entity or the second UE may be based on the signal being received via the first subset or the second subset.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first discontinuous reception configuration associated with the first subset may be associated with a first radio resource control state between the first UE and the network entity, a second discontinuous reception configuration associated with the first subset may be associated with a second radio resource control state between the first UE and the network entity, a third discontinuous reception configuration associated with the first subset may be associated with a third radio resource control state between the first UE and the network entity, a fourth discontinuous reception configuration associated with the second subset may be associated with a fourth radio resource control state between the first UE and the second UE, a fifth discontinuous reception configuration associated with the second subset may be associated with a fifth radio resource control state between the first UE and the second UE, and a sixth discontinuous reception configuration associated with the second subset may be associated with a sixth radio resource control state between the first UE and the second UE.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of a configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a set of multiple resource pools associated with a bandwidth portion associated with the sidelink communication of the first UE.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an indication of a UE type of the first UE to the network entity, wherein the configuration may be based on the UE type.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a second signal from a third UE via the wake-up radio via a default resource pool according to a default configuration when the first radio may be in the sleep mode.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an indication of a number of resource pools that the UE may be able to support via the wake-up radio, wherein the configuration may be based on the indication of the number of resource pools that the UE may be able to support via the wake-up radio.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the side link communication resource set.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for: receiving an indication that a synchronization signal may be enabled for a resource pool corresponding to the side link communication resource set, wherein the synchronization signal may be located outside the resource pool.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for: receiving an indication of a set of multiple resource pools for sidelink communication, wherein the sidelink communication resource set includes a resource pool in the set of multiple resource pools, wherein when the first radio may be in the sleep mode, the first UE deactivates monitoring of each resource pool in the set of multiple resource pools except for the resource pool.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication that the configuration may be associated with the second UE.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for: receiving an indication that the configuration may be associated with a first sub-pool of resources of a resource pool for sidelink communications, wherein the sidelink communications resource set includes the first sub-pool of resources, and wherein a guard band separates the first sub-pool of resources from a second sub-pool of resources of the resource pool.

[0024] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: utilizing the control signaling to receive an indication of a set of multiple configurations associated with the sidelink communication resource set, the set of multiple configurations including the configuration; and receiving second control signaling from the second UE indicating the configuration from the set of multiple configurations.

[0025] A method for wireless communication at a second UE is described. The method may include: receiving control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to a first UE when a first radio of the first UE is in a sleep mode; and sending a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0026] An apparatus for wireless communication at a second UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: receive control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to a first UE when a first radio of the first UE is in a sleep mode; and send a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0027] Another apparatus for wireless communication at a second UE is described. The apparatus may include: means for receiving control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to a first UE when a first radio of the first UE is in a sleep mode; and means for sending a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0028] A non-transitory computer-readable medium storing code for wireless communication at a second UE is described. The code may include instructions executable by a processor to: receive control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to a first UE when a first radio of the first UE is in a sleep mode; and send a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0029] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for communicating with the first UE based on sending the signal, wherein the signal includes a wake-up signal.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs, and wherein communication with the first UE may be based on the signal being sent via the second subset.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of a configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a set of multiple resource pools associated with a bandwidth portion associated with the sidelink communication of the first UE.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the side link communication resource set.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for: receiving an indication that a synchronization signal may be enabled for a resource pool corresponding to the side link communication resource set, wherein the synchronization signal may be located outside the resource pool.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication of a set of multiple resource pools for sidelink communications, wherein the sidelink communications resource set includes a resource pool in the set of multiple resource pools.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for receiving an indication that the configuration may be associated with the first UE.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, components, or instructions for: receiving an indication that the configuration may be associated with a first sub-pool of resources of a resource pool for sidelink communications, wherein the sidelink communications resource set includes the first sub-pool of resources, and wherein a guard band separates the first sub-pool of resources from a second sub-pool of resources of the resource pool.

[0039] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: utilizing the control signaling to receive an indication of a set of multiple configurations associated with the sidelink communication resource set, the set of multiple configurations including the configuration; and sending a second control signaling to the first UE indicating the configuration from the set of multiple configurations.

[0040] A method of wireless communication at a network entity is described. The method may include: receiving an indication of a UE type of a first UE from a first UE; and sending control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0041] An apparatus for wireless communication at a network entity is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: receive an indication of a UE type of the first UE from a first UE; and send control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0042] Another apparatus for wireless communication at a network entity is described. The apparatus may include: means for receiving an indication of a UE type of the first UE from a first UE; and means for sending control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0043] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to: receive an indication of a UE type of a first UE from a first UE; and send control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0044] Some examples of the methods, devices, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending a second control signaling to the second UE indicating that a wake-up signal is to be sent to the first UE according to the configuration; and communicating with the first UE based on sending the second control signaling.

[0045] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs.

[0046] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset.

[0047] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for: sending an indication of a configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a set of multiple resource pools associated with a bandwidth portion associated with the sidelink communication of the first UE.

[0048] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0049] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, from the first UE, an indication of a number of resource pools that the UE may be able to support in the sleep mode, wherein the configuration may be based on the indication of the number of resource pools that the UE may be able to support in the sleep mode.

[0050] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the side link communication resource set.

[0051] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication that a synchronization signal may be enabled for a resource pool corresponding to the side link communication resource set, wherein the synchronization signal may be located outside the resource pool.

[0052] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication of a set of multiple resource pools for sidelink communications, wherein the sidelink communications resource set includes a resource pool in the set of multiple resource pools.

[0053] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication that the configuration may be associated with the second UE.

[0054] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for: sending an indication that the configuration may be associated with a first sub-pool of resources of a resource pool for sidelink communications, wherein the sidelink communications resource set includes the first sub-pool of resources, and wherein a guard band separates the first sub-pool of resources from a second sub-pool of resources of the resource pool.

[0055] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, components, or instructions for sending an indication of a set of multiple configurations associated with the side link communication resource set, the set of multiple configurations including the configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 An example of a wireless communication system supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0057] Figure 2 An example of a block diagram of a device supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0058] Figure 3 An example of a wireless communication system supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0059] Figure 4 An example of a configuration diagram supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0060] Figure 5 An example of a configuration diagram supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0061] Figure 6 An example of a configuration diagram supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0062] Figure 7 An example of a configuration diagram supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0063] Figure 8 An example of a resource map supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0064] Fig. 9An example of a resource map supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0065] Fig.10 An example of a time slot format supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0066] Fig.11 An example of a process flow to support low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated.

[0067] Fig.12 and Fig.13 A block diagram of a device supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0068] Fig.14 A block diagram of a communication manager supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0069] Fig.15 A diagram of a system including a device supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0070] Fig.16 and Fig.17 A block diagram of a device supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0071] Fig.18 A block diagram of a communication manager supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0072] Fig.19 A diagram of a system including a device supporting low power wake-up radio in sidelink communications is shown in accordance with one or more aspects of the present disclosure.

[0073] Figure 20 to Figure 25 A flow chart illustrating a method of supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0074] In addition to the main radio, some user equipment (UE) may also include a wake-up radio receiver. When the UE is in sleep mode, the wake-up radio monitors a wake-up signal, a low-power reference signal (for channel estimation) and / or a low-power synchronization signal (for synchronization). The wake-up radio receiver uses less power than the main radio, and therefore when the UE is in sleep mode, the wake-up radio saves power at the UE. The network entity may wake up the UE by sending a wake-up signal to the UE, and then the UE may communicate with the network entity or communicate with another UE via a side link. Another UE may also send a wake-up signal to the UE in sleep mode. The network entity may indicate resources that can be used for side link communication (e.g., including a bandwidth portion (BWP) of a resource pool). In side link mode 1, the network entity sends scheduling resources for the side link between UEs. In side link mode 2, the UE autonomously selects side link resources from a configured resource pool based on reference signal received power (RSRP) measurements for different resource pools. If the UE is out of range of the network entity, the network entity may not be able to directly assign side link resources to the UE.

[0075] Various aspects of the present disclosure relate to configuring communication resources that support low-power wake-up radio in sidelink communications. For example, some aspects relate to configuring sidelink communication resources that support low-power wake-up radio in sidelink communications. When the main radio of the UE is in sleep mode, the network entity indicates the configuration for wake-up radio signaling to the UE. The UE may then use the wake-up radio to monitor and receive a wake-up signal, a low-power reference signal, or a low-power synchronization signal from a second UE according to the configuration. If the UE receives a wake-up signal from the second UE, the UE may establish communication with the second UE or with the network entity based on the wake-up signal. In some cases, the configuration may be for a sidelink BWP for the UE, and the configuration may indicate a resource pool for wake-up radio signaling. In some cases, the network entity may indicate multiple dedicated resource pools within the BWP that can be used for wake-up radio signaling. In some cases, the network entity may indicate a sub-resource pool that can be used for wake-up radio signaling within each resource pool of the BWP. In some cases, the wake-up signaling resources may be shared with the main radio resources. The configuration may indicate, by resource pool or by sub-resource pool, a monitoring opportunity for a low-power reference signal, a monitoring opportunity for a low-power synchronization signal, a monitoring opportunity for a wake-up signal, and a division of resources dedicated to wake-up signaling and resources dedicated to primary radio communications. In some examples, the configuration of wake-up radio signaling resources may be based on a category or type of UE, which the UE may report to a network entity.

[0076] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are additionally illustrated with reference to block diagrams, configuration diagrams, resource diagrams, and process flows. Aspects of the present disclosure are further illustrated and described with reference to device diagrams, system diagrams, and flow diagrams related to low power wake-up radio in sidelink communications.

[0077] Figure 1 An example of a wireless communication system 100 supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, a new radio (NR) network, or a network operating according to other systems and radio technologies (including future systems and radio technologies not explicitly mentioned herein).

[0078] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other names. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area), and the UE 115 and the network entity 105 may establish one or more communication links 125 over the coverage area. The coverage area 110 may be an example of a geographic area, and the network entity 105 and the UE 115 may support signal communications over the geographic area according to one or more radio access technologies (RATs).

[0079] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1 . The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0080] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from the second node.

[0081] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), or other examples or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0082] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next generation eNB (ng-eNB), a Home Node B, a Home Evolved Node B, or other suitable terms). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0083] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0084] The functional split between CU 160, DU 165, and RU 170 is flexible and can support different functionalities, depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of a protocol stack can be employed between CU 160 and DU 165, such that CU 160 can support one or more layers of a protocol stack and DU 165 can support one or more different layers of a protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DUs 165 and RUs 170, such that the DUs 165 may support one or more layers of the protocol stack, and the RUs 170 may support one or more different layers of the protocol stack. The DUs 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within the protocol layer (e.g., some functions of the protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by the other of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) functions and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 that communicate via those communication links.

[0085] In some wireless communication systems (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to the core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as host entities or IAB hosts. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a host network entity 105 (e.g., a host base station 140). One or more host network entities 105 (e.g., IAB hosts) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a DU 165 of a coupled IAB host. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0086] For example, an access network (AN) or RAN may include an access node (e.g., an IAB host), communications between an IAB node 104, and one or more UEs 115. The IAB host may facilitate a connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB host may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB host may include a CU 160 and at least one DU 165 (e.g., and RU 170), wherein the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB host and the IAB node 104 may communicate via an F1 interface according to a protocol defining a signaling message (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of part of a backhaul link) and may communicate with other CUs 160 (e.g., CU 160 associated with an alternative IAB host) via an Xn-C interface (which may be an example of part of a backhaul link).

[0087] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). DU 165 may act as a distributed scheduling node toward child nodes associated with IAB node 104, and IAB-MT may act as a scheduled node toward a parent node associated with IAB node 104. That is, an IAB host may be referred to as a parent node that communicates with one or more child nodes (e.g., an IAB host may relay for UE transmissions through one or more other IAB nodes 104). Additionally or alternatively, depending on the relay chain or configuration of the AN, an IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104 , and a DU interface (eg, DU 165 ) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115 .

[0088] For example, the IAB node 104 may be referred to as a parent node supporting communications for a child IAB node or as a child node associated with the IAB host, or both. The IAB host may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB host may relay transmission to the UE 115 via the IAB node 104, or may directly signal the transmission to the UE 115, or both. The CU 160 of the IAB host may signal the establishment of a communication link to the IAB node 104 via the F1 interface, and the IAB node 104 may schedule transmission (e.g., transmission relayed from the IAB host to the UE 115) via the DU 165. That is, data may be relayed to and from the IAB node 104 via signaling via the NR Uu interface to the MT of the IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB host, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0089] In the case where the techniques described herein are applied to the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support low power wake-up radio in sidelink communications as described herein. For example, some operations described as being performed by UE 115 or network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the disaggregated RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO 180).

[0090] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0091] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0092] The UE 115 and the network entity 105 may use resources associated with one or more carriers to wirelessly communicate with each other via one or more communication links 125 (e.g., access links). The term "carrier" may refer to a collection of RF spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, the carrier used for the communication link 125 may include a portion of an RF spectrum band (e.g., a BWP) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-APro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between a device and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of the network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of the RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0093] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified according to a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0094] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, as well as other transmission configurations. A carrier may carry downlink communications or uplink communications (e.g., in FDD mode), or may be configured to carry downlink communications and uplink communications (e.g., in TDD mode).

[0095] A carrier may be associated with a particular bandwidth of the RF spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths of carriers for a particular radio access technology (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz). A device of the wireless communication system 100 (e.g., a network entity 105, a UE 115, or both) may have a hardware configuration that supports communications using a particular carrier bandwidth, or may be capable of being configured to support communications using one of the carrier bandwidths in the set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0096] The signal waveform transmitted via the carrier may be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM techniques, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers, beams), and the use of multiple spatial resources may increase the data rate or data integrity of the communication with the UE 115.

[0097] One or more parameter sets for a carrier may be supported, and the parameter sets may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications of a UE 115 may be constrained to one or more active BWPs.

[0098] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0099] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, a time slot may also be divided into a plurality of mini-time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0100] A subframe, a time slot, a mini-time slot, or a symbol may be a minimum scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the minimum scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0101] Physical channels may be multiplexed using carriers for communication according to various techniques. For example, physical control channels and physical data channels may be multiplexed via downlink carriers for signaling using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to a plurality of UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0102] The network entity 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with the network entity 105 (e.g., using a carrier), and may be associated with an identifier used to distinguish adjacent cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other cell identifier). In some examples, a cell may also refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) on which the logical communication entity operates. Depending on various factors such as the capabilities of the network entity 105, such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas. For example, a cell may be or may include a building, a subset of a building, or an external space between or overlapping coverage areas 110, and the like.

[0103] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have service subscriptions with a network provider that supports the macro cell. As compared to a macro cell, a small cell may be associated with a lower power network entity 105 (e.g., a lower power base station 140), and the small cell may operate using the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to a UE 115 that has a service subscription with a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a home or office). A network entity 105 may support one or more cells, and may also use one or more component carriers to support communications via one or more cells.

[0104] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0105] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0106] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the network entities 105 (e.g., base stations 140) may have similar frame timing, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, the network entities 105 may have different frame timing, and in some examples, transmissions from different network entities 105 may not be aligned in time. The techniques described herein may be used for either synchronous operation or asynchronous operation.

[0107] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices with integrated sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, wildlife monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0108] Some UEs 115 may be configured to employ a mode of operation that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but does not transmit and receive concurrently). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communications, operating using limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0109] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication may include private communication or group communication, and may be supported by one or more services (such as push-to-talk, video, or data). Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety applications or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency are used interchangeably herein.

[0110] In some examples, a UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support various aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 of such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be conducted between UEs 115 without involving network entity 105.

[0111] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0112] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity for managing access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity for routing packets or interconnecting to an external network (e.g., a serving gateway (S-GW)), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered via the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to an IP service 150 for one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0113] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength range is approximately one decimeter to one meter. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than communications using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0114] The wireless communication system 100 may also operate in a super high frequency (SHF) region (also known as a centimeter band) in the range of 3 GHz to 30 GHz or in an extremely high frequency (EHF) region (e.g., 30 GHz to 300 GHz) (also known as a millimeter band) using a spectrum. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between UE 115 and network entity 105 (e.g., base station 140, RU 170), and the EHF antenna of the corresponding device may be smaller and closer than the UHF antenna. In some examples, such technology may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be affected by greater attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0115] The wireless communication system 100 may utilize both licensed RF spectrum bands and unlicensed RF spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology using unlicensed bands such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating using unlicensed RF spectrum bands, devices such as network entities 105 and UE 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations using unlicensed bands may be based on carrier aggregation configuration in combination with component carriers operating using licensed bands (e.g., LAA). Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0116] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a set of rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0117] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such technology may be referred to as spatial multiplexing. Multiple signals may be, for example, sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technologies include single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0118] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals conveyed via antenna elements of an antenna array so that some signals propagating along a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other orientation).

[0119] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device (such as network entity 105), or by a receiving device (such as UE 115)) beam directions for later transmission or reception by the network entity 105.

[0120] Some signals, such as data signals associated with a particular receiving device, may be sent by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0121] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or non-precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0122] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by receiving via different antenna subarrays, processing the received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing the received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0123] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly to communicate via logical channels. The MAC layer may perform priority processing and multiplexing of logical channels to transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map a transport channel to a physical channel.

[0124] UE 115 and network entity 105 may support retransmission of data to increase the likelihood of data being successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific time slot for data received via a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0125] In some examples, in addition to the main radio, the UE 115 may also include a wake-up radio receiver. When the UE 115 is in sleep mode, the wake-up radio may monitor a wake-up signal, a low-power reference signal (for channel estimation), and / or a low-power synchronization signal (for synchronization). The wake-up radio receiver uses less power than the main radio, and therefore when the UE 115 is in sleep mode, including the wake-up radio saves power at the UE 115. The network entity 105 may wake up the UE 115 by sending a wake-up signal to the UE 115, and then the UE 115 may communicate with the network entity 105 or communicate with another UE 115 via a side link. Another UE 115 may also send a wake-up signal to the UE 115 in sleep mode. The network entity 105 may indicate resources (e.g., a BWP including a resource pool) that can be used for sidelink communication. In sidelink mode 1, the network entity 105 sends scheduled resources for the sidelink. In sidelink mode 2, UE 115 autonomously selects sidelink resources from the configured resource pools based on RSRP measurements for different resource pools. Network entity 105 may not be able to assign sidelink resources directly to UE 115 if UE 115 is out of range of the network entity.

[0126] When the primary radio of UE 115 is in sleep mode, network entity 105 indicates a configuration for wake-up radio signaling to UE 115. UE 115 may then use the wake-up radio to monitor and receive a wake-up signal, a low-power reference signal, or a low-power synchronization signal from a second UE 115 according to the configuration. If UE 115 receives a wake-up signal from the second UE 115, UE 115 may establish communication with the second UE 115 or with network entity 105 based on the wake-up signal. In some cases, the configuration may be for a sidelink BWP for UE 115, and the configuration may indicate a resource pool for wake-up radio signaling. In some cases, network entity 105 may indicate multiple dedicated resource pools within the BWP that may be used for wake-up radio signaling. In some cases, network entity 105 may indicate a sub-resource pool within each resource pool of the BWP that may be used for wake-up radio signaling. In some cases, wake-up signaling resources may be shared with primary radio resources. The configuration may indicate, by resource pool or by sub-resource pool, monitoring opportunities for low-power reference signals, monitoring opportunities for low-power synchronization signals, monitoring opportunities for wake-up signals, and a division of resources dedicated to wake-up signaling and resources dedicated to primary radio communications. In some examples, the configuration of wake-up radio signaling resources may be based on a category or type of UE 115, which UE 115 may report to a network entity.

[0127] Figure 2 An example of a block diagram 200 that supports a low power wake-up radio in sidelink communications in accordance with one or more aspects of the present disclosure is illustrated. The block diagram 200 can implement aspects of a wireless communication system 100. As described herein, some wireless communication systems 100 can include a UE 115-a that includes a wake-up radio receiver (or wake-up radio) 205 in addition to a primary radio 210.

[0128] In some examples, when the main radio 210 is in a sleep state, the wake-up radio 205 may monitor a wake-up signal, a low-power reference signal (for channel estimation), and / or a low-power synchronization signal (for synchronization). The wake-up radio 205 may use less power than the main radio 210, and thus the wake-up radio 205 saves power at the UE 115-a when the UE 115-a is in sleep mode. In some examples, the wake-up radio 205 may be powered separately from the main radio 210 and powered by a block that consumes less power. In some examples, the wake-up radio 205 may wake up the main radio 210 when actual communication is required. The wake-up radio 205 can reduce the overall power consumption of the UE 115-a by avoiding unnecessary wake-ups of the main radio 210 that may be associated with higher power consumption. In some examples, the wake-up radio 205 can reduce latency. For example, because the wake-up radio 205 consumes low power, the wake-up radio 205 may monitor the wake-up signal more frequently, thereby reducing average latency while maintaining low power consumption.

[0129] In some examples, the primary radio 210 can be a single modem with different firmware, software, and / or hardware for the side link interface and the Uu interface. In some examples, the primary radio 210 can include separate modems for the side link interface and the Uu interface (in some examples, with some common components, and in some examples, with no common components).

[0130] In some examples, a UE 115-a with a wake-up radio 205 and a primary radio 210 may be used for Internet of Things (IoT) applications. For IoT applications, there may be a trade-off between latency and power consumption. In some examples, IoT applications may have low power requirements that tolerate latency, such as periodic sensing and metering use cases. For low power requirements, the duty cycle or the proportion of time that the primary radio 210 operates during a period is minimized with a longer latency to extend the battery life of the UE 115-a. In some examples, IoT applications may have lower latency requirements, such as actuator control, on-demand sensing where the timeliness of the sensed information is important, and on-demand location tracking. In lower latency requirement examples, achieving lower latency may increase power consumption. Using a UE 115-a with a wake-up radio 205 and a primary radio 210 for IoT applications may provide lower latency and lower power consumption than a UE 115 without a wake-up radio 205.

[0131] In some examples, the wake-up signal may be designed to have a scalable bandwidth. A larger wake-up signal bandwidth increases power consumption, and therefore in some examples, a narrower bandwidth may be used. In some examples, the wake-up signal may support repetition to improve coverage. In some examples, a configurable frequency guard band separates the wake-up signal from other signals. The guard band may be used to improve the filtering performance of the wake-up radio 205 receiving the wake-up signal. In some examples, the minimum guard band may be specified by UE115-a (e.g., in a control signal sent to another UE 115 or to a network entity 105). In some examples, the wake-up signal may be designed to have different modulations and waveforms, taking into account different use cases. For example, due to the low power requirements of on-off keying (OOK) signaling, waveforms such as signals based on OOK sequences carried on orthogonal frequency division multiplexing (OFDM) can be used for ultra-low power IoT applications. For example, signals based on quadrature phase shift keying (QPSK) sequences carried on waveforms can be used for low-power eMBB or extended reality (XR) applications. In some examples, the wake-up signal may be designed to have an OFDM-based waveform or an OOK-based waveform. For the OFDM-based waveform design, the wake-up radio 205 processes the wake-up signal at baseband, and the wake-up radio 205 may use the main radio 210 to receive the wake-up signal. For the OOK-based waveform design, the wake-up radio 205 uses an envelope detector (e.g., a low intermediate frequency (IF)) to process the wake-up signal, and the wake-up radio 205 is a receiver separate from the main radio 210. For the OOK-based waveform design, Manchester codes may be used to simplify the receiver implementation to improve anti-interference performance, and to ensure a 50% duty cycle and avoid long zero cycles. The OOK-based waveform design of the wake-up signal provides greater power savings than the OFDM-based waveform design.

[0132] Figure 3 An example of a wireless communication system 300 that supports a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The wireless communication system 300 may implement aspects of the wireless communication system 100. For example, the wireless communication system 300 may include a UE 115-b and a UE 115-c, which may be examples of a UE 115 as described herein. The wireless communication system 300 may include a network entity 105-a, which may be an example of a network entity 105 as described herein. In some examples, one or both of the UE 115-b and the UE 115-c may include a wake-up radio 205 and a primary radio 210.

[0133] UE 115-b may communicate with network entity 105-a using communication link 125-a, which may be an example of an NR or LTE link between UE 115-b and network entity 105-a. UE 115-c may communicate with network entity 105-a using communication link 125-b, which may be an example of an NR or LTE link between UE 115-c and network entity 105-a. Communication link 125-a and communication link 125-b may include bidirectional links that implement both uplink and downlink communications. For example, UE 115-b may send uplink transmissions such as uplink control signals or uplink data signals to network entity 105-a using communication link 125-a, and network entity 105-a may send downlink transmissions such as downlink control signals or downlink data signals to UE 115-b using communication link 125-a. UE 115-c may use communication link 125-b to send uplink signals, such as uplink control signals or uplink data signals, to network entity 105-a, and network entity 105-a may use communication link 125-b to send downlink signals, such as downlink control signals or downlink data signals, to UE 115-c.

[0134] UE 115-b may communicate with UE 115-c using sidelink communication link 135-a. Sidelink communication link 135-a may include a bidirectional link that enables UE 115-b and UE 115-c to send and receive sidelink signals. In some examples (e.g., in Mode 1), the network (e.g., network entity 105-a) may configure resources for sidelink communication link 135-a. In some examples, UE 115-b and UE 115-c may communicate via sidelink communication link 135-a using directional communication technology (e.g., beamforming technology). In some examples (e.g., in Mode 2), UE 115-b and UE 115-c may autonomously determine and configure resources for sidelink communication link 135-a (e.g., without participation from network entity 105-a).

[0135] In some examples, the network entity 105-a may send a low power (LP) wake-up signal (LP-WUS) 305-a, an LP synchronization signal associated with the LP-WUS 305-a (e.g., the LP synchronization signal may be sent in a preamble 355 of the LP-WUS 305), a low power reference signal (LP-RS) 310-a, a low power synchronization signal (LP-SS) 315-a, and / or a control signal (CS) 320-a to the UE 115-b via the communication link 125-a. Similarly, the network entity 105-a may send the LP-WUS 305-b, an LP synchronization signal associated with the LP-WUS 305-b, the LP-RS 310-b, the LP-SS 315-b, and / or the CS 320-b to the UE 115-b via the communication link 125-b. In some examples, UE 115-a may send LP-WUS 305-c, LP synchronization signal associated with LP-WUS 305-c, LP-RS 310-c, LP-SS 315-c and / or CS 320-c to UE 115-b via sidelink communication link 135-a, or vice versa.

[0136] In some cases, for example, if UE 115-c is out of range of network entity 105-a or at the cell edge, UE 115-b may wake up UE 115-c. In the sidelink, a BWP may include multiple receive and transmit resource pools, and physical layer channels may be configured per resource pool. In sidelink mode 1, sidelink resources are scheduled by network entity 105-a. Network entity 105-a assigns resources for sidelink transmission. Both dynamic allocation via downlink control information (DCI) format 3-x and configured transmission (type 1 and type 2) may be supported. In sidelink mode 2, UEs (UE 115-b and UE 115-c) may autonomously select sidelink resources from a configured (preconfigured) sidelink resource pool based on a channel sensing mechanism. UEs (e.g., UE 115-b and UE 115-c) may sense resources from a resource pool. Based on the results of the sensing (e.g., the priorities of different transmissions and RSRP), the UEs (e.g., UE 115-b and UE 115-c) may select resources from the configured resource pool for transmission. For in-coverage UEs, the network entity 105-a may configure the UEs (e.g., UE 115-b and UE 115-c) to adopt mode 1 or mode 2. For out-of-coverage UEs (e.g., if UE 115-c is out of range), the out-of-coverage UEs may operate in mode 2 instead of mode 1.

[0137] In some examples, the LP-WUS (305-a, 305-b, 305-c), and the LP-WUS 305 The associated LP synchronization signal, LP-RS (310-a, 310-b, 310-c) and LP-SS (315-a, 315-b, 315-c) may have a configuration including the following: 1) the type of signal; 2) the type of waveform; 3) modulation information applied to the time domain or frequency domain; 4) the periodicity of the signals of the LP-RS and LP-SS, or if a discontinuous reception (DRX) cycle is configured for a low power wake-up radio (LP-WUR), the monitoring timing in the case of an LP-WUS with a DRX cycle, or if DRX is not configured for the LP-WUR, the periodicity of the LP-WUS; 5) repetition of the signal (e.g., the signal of multiple time resources and frequency resources is repeated a configurable number of times); and / or 6) time / frequency size (e.g., time symbols or time units or time elements and frequency elements or frequency units such as the number of resource elements or resource blocks (RBs) or subchannels). In some examples, the configuration for the LP-WUS (305-a, 305-b, 305-c) may configure an associated LP synchronization signal (eg, the associated LP synchronization signal may be sent in the preamble 355 prior to the LP-WUS 305).

[0138] For resources used for wake-up radio signaling, several options can be configured (e.g., via RRC signaling (e.g., in control signals 320-a or 320-b)). In a first option, a dedicated BWP with a dedicated resource pool for LP-WUR including LP-WUS, LP-RS (for channel estimation), or LP-SS (for synchronization). In a second option, dedicated resources for LP-WUR within the BWP can be configured. In a third option, a dedicated sub-resource pool (e.g., a portion of a resource pool) for each resource pool within the BWP can be configured for the LP-WUR. In a fourth option, the LP-WUR can share a resource pool with the primary radio. Each option can be configured by UE category or type, and different configurations can be used for different types of UEs (e.g., which subcarrier spacing, bandwidth the UE type supports in the LP-WUR). Configuration by resource pool may include at least one of the following: 1) LP-RS (similar to CSI-RS or tracking reference signal (TRS) for primary radio) configuration and monitoring timing; 2) LP-SS (similar to synchronization signal block (SSB) for primary radio) configuration and monitoring timing; 3) LP-WUS configuration and monitoring timing; and 4) division of resource pool and sub-resource pool configuration in the case of configuration for sub-resource pool.

[0139] In some examples, the configuration of the signal type for LP-WUS may be channel coded transmission (e.g., as in a physical downlink control channel (PDCCH)-based DCI utilizing polarization decoding for channel decoding). In some examples, the configuration of the signal type for LP-WUS or LP-RS or LP-SS may be sequence-based transmission (e.g., OOK, amplitude shift keying (ASK), phase shift keying (PSK), quadrature amplitude modulation (QAM), frequency shift keying (FSK), Chirp, Zadoff, pulse position modulation (PPM), pulse amplitude modulation (PAM), pulse width modulation (PWM), Gaussian, Bernoulli, Gold, discrete Fourier transform (DFT), Reed-Solomon, Walsh [Hadamard] transmission) (e.g., as in CSI-RS, sounding reference signal (SRS), demodulation reference signal (DMRS), SSB primary synchronization signal (PSS) or secondary synchronization signal (SSS), etc.). In some examples, the configuration of the signal type for LP-WUS, LP-RS, or LP-SS may be a waveform such as OFDM or a sequence-based OOK signal carried on a single carrier or others.

[0140] In some examples, the configuration of the waveform for LP-WUS, LP-RS, or LP-SS can be OFDM for a single carrier or DFT-spread OFDM or single carrier quadrature amplitude modulation (SC-QAM) for others. In some examples, the configuration for modulating the information LP-WUS, LP-RS, or LP-SS can be OOK (e.g., using Manchester decoding or differential decoding), ASK, PSK, QAM, FSK, Chirp, Zadoff, PPM, PAM, PWM, Gaussian, Bernoulli, Gold, DFT, Reed-Solomon, Walsh (Hadamard), or others.

[0141] In some examples, the LP-WUS may be a coded control signal, such as a DCI, similar to a new radio wake-up signal (e.g., a PDCCH-based DCI with polarization coding). In some examples, the LP-WUS may be a sequence-based signal (e.g., DFT, Gold, ASK, PSK, PPM, PWM, PAM, Walsh, m-seq, Zadoff, Reed Solomon) having a format similar to physical uplink communication channel (PUCCH) format 0, or the LP-WUS may be a time domain sequence-based signal that modulates a time domain signal with a sequence. In some examples, the LP-WUS may be an OOK-based waveform signal having an OFDM waveform that modulates a time domain signal with low and high voltage signals.

[0142] In some examples, the LP-RS may be a sequence-based signal (e.g., DFT, Gold, ASK, PSK, PPM, PWM, PAM, Walsh, m-seq, Zadoff, Reed Solomon) similar to DMRS, CSI-RS, SRS, or TRS, or the LP-RS may be a time domain sequence-based signal that modulates a time domain signal with a sequence. In some examples, the LP-RS may be an OOK-based waveform signal with an OFDM waveform or DFT-s-OFDM or a single carrier or SC-QAM that modulates a time domain signal with different voltages.

[0143] In some examples, LP-SS may be a sequence-based signal similar to PSS of SSB or SSS of SSB, or a time-domain sequence-based signal that modulates a time-domain signal with a sequence. In some examples, LP-RS may be an OOK-based waveform signal having an OFDM waveform that modulates a time-domain signal with low and high voltage signals.

[0144] In some examples (e.g., in high frequency or broadband communications), some devices may use OFDM signals while some other devices may use OOK signals. In such cases, it may be desirable for OFDM and OOK signals to coexist in the same wireless spectrum (e.g., the same high frequency spectrum). Thus, a transmitter may multiplex OOK-based waveforms with other OFDM waveforms (e.g., to achieve power savings for a receiver receiving the OOK-based waveforms). Additionally or alternatively, a transmitter (e.g., network entity 105-a) may transmit both an OOK signal and an OFDM signal, wherein a first receiver (e.g., UE 115-b) may receive the OOK signal and a second receiver (e.g., UE 115-c) may receive the OFDM signal. Alternatively, in an uplink scenario, a first receiver (e.g., UE 115-b) and a second receiver (e.g., UE 115-c) may send OOK signals and OFDM signals, respectively, however, the receivers may receive the OOK signals and OFDM signals on the same frequency band (e.g., on different resource blocks or resource elements in the same frequency band).

[0145] In some examples, a waveform generator (e.g., an OFDM waveform generator) may generate an OFDM waveform including an OOK waveform having a specific frequency range. For example, the waveform generator may generate an OOK waveform based on an OFDM symbol. In such examples, the transmitter may turn the waveform generator on and off to generate an on-off pattern across multiple OFDM symbols. However, such an OFDM symbol-based OOK waveform may have a relatively high granularity (e.g., based on one OFDM symbol). In addition, the transmitter may not be able to use the OFDM symbol-based OOK waveform to send other non-OFDM waveforms to other receiving devices. Alternatively, the waveform generator may generate a waveform based on a sub-OFDM symbol. In such examples, the transmitter may zero half of the OFDM symbol (e.g., the first half or the second half) in the time domain to generate an on-off pattern within the OFDM symbol. However, such a waveform based on a sub-OFDM symbol may introduce a bandwidth regeneration problem because the bandwidth of the sub-OFDM symbol may be extended after half of the signal is zeroed. In the case where the wireless communication system 300 supports Wi-Fi communication, the access point may generate an OOK signal.

[0146] In some aspects, the transmitter may use a Manchester code (e.g., a code with phase encoding (PE)) to generate an OOK waveform. For example, the Manchester code may include a line code for which the transmitter may encode each data bit as a high state or a low state for an equal amount of time (e.g., 0: on to off, 1: off to on). That is, each data bit may be encoded as a transition from an on state to an off state or a transition from an off state to an on state. In some examples, the Manchester code may simplify the design of the receiver by enabling the transmitter to suppress the detector threshold in the estimated receiver and provide a more robust structure (e.g., unbiased, equal number of 0s and 1s) to resist interference. That is, the transmitter may use the transition between the on and off durations to generate an OOK waveform, where the receiver may detect the change in power rather than the absolute power of the OOK waveform. However, using Manchester decoding of an OOK waveform based on an OFDM symbol, the transmitter may send one bit every two OFDM symbols, which may reduce signaling throughput and spectral efficiency.

[0147] For NR communications in wireless communication systems 100 and 300, the transmitter may multiplex other OFDM signals (e.g., in the frequency domain) with the OOK signal. For example, the wireless communication systems 100 and 300 may support a transmitter (e.g., network entities 105 and 105-a) to multiplex one or more OOK waveforms with one or more OFDM waveforms. In some examples, the transmitter may modulate a set of data bits into an OOK sample sequence (the OOK sample sequence may be a time domain sample sequence) for wireless transmission to a first receiver in a first frequency resource set. The transmitter may apply a transform to an OOK sample sequence to be represented as a frequency domain sample sequence (e.g., a frequency representation of the OOK sample sequence). Using the frequency domain sample sequence, the transmitter may generate an OOK-based OFDM waveform. In some aspects, the frequency domain sample sequence is mapped to one or more resource elements included in the first frequency resource set. The transmitter may send the OFDM waveform to a first receiver. Therefore, the receiver may use a simple detection scheme (e.g., incoherent envelope detection) to decode the OOK modulated OFDM waveform. It should be noted that the techniques described herein are directly applicable to ASK-based OFDM waveforms, in addition to other OFDM waveforms based on other ASK-based signal modulations.

[0148] Figure 4 An example of a configuration diagram 400 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The configuration diagram 400 can implement aspects of the wireless communication system 100 and the wireless communication system 300.

[0149] Configuration diagram 400 illustrates an example sidelink configuration or pre-configuration in NR for sidelink communication between UEs 115 via a sidelink communication link 135. The configuration may be indicated via RRC. The configuration identifies a sidelink frequency configuration 405. In some examples, the sidelink frequency is equivalent to a carrier in Uu. The sidelink frequency configuration 405 may include point A 410 (the lowest frequency subband of the sidelink frequency), a sidelink BWP configuration 430, a physical sidelink broadcast channel (PSBCH) configuration 415, and a subcarrier spacing (SCS) specific carrier list 420. The SCS specific carrier list 420 may include an SCS specific configuration 425 for bandwidth or position. The sidelink BWP configuration 430 may include a BWP general configuration 435 with bandwidth and position, SCS and cyclic prefix (CP), and time domain resources 440. The sidelink BWP configuration 430 may also include a resource pool configuration 445. In some examples, the resource pool configuration in the sidelink BWP includes sixteen receiving pools and eight transmitting pools. Resource pool configuration 445 includes a transmit resource pool for mode 1, a resource pool for mode 2, and a receiver resource pool 450. Configuration by resource pool 455 may include physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), and physical sidelink feedback channel (PSFCH) configuration, number of subchannels, subchannel size, starting RB, code block rate (CBR), modulation and coding scheme (MCS), and sensing configuration and power control. In some examples, a BWP may include multiple receive and transmit resource pools, and physical layer channels are configured by resource pool.

[0150] Figure 5 An example of a configuration diagram 500 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The configuration diagram 500 can implement aspects of the wireless communication system 100 and the wireless communication system 300.

[0151] Configuration diagram 500 illustrates an example sidelink configuration or pre-configuration in NR for sidelink communication between UEs 115 via a sidelink communication link 135. The configuration may be indicated via RRC. In some examples, the configuration includes a dedicated sidelink BWP having a dedicated resource pool for LP-WUR including LP-WUS, LP-RR, and LP-SS. The configuration identifies a sidelink frequency configuration 405-a. The sidelink frequency configuration 405-a may include point A 410-a (the lowest frequency subband of the sidelink frequency), a sidelink BWP configuration 430-a, a PSBCH configuration 415-a, and an SCS specific carrier list 420-a. The SCS specific carrier list 420-a may include an SCS specific configuration 425-a for bandwidth or location. The sidelink BWP configuration 430-a may include a BWP general configuration 435-a with bandwidth and location, SCS and cyclic prefix (CP), and time domain resources 440-a. The sidelink BWP configuration 430-a may also include a resource pool configuration 445-a. The resource pool configuration 445-a includes a transmit resource pool for mode 1, a resource pool for mode 2, and a receiver resource pool 450-a. The resource pool configuration 455-a may include PSSCH, PSCCH and PSFCH configurations, the number of subchannels, the subchannel size, the starting RB, the CBR, the MSC, and the sensing configuration and power control. In some examples, included in the sidelink frequency configuration is a dedicated sidelink BWP shown as a sidelink BWP LP-WUR configuration 505, which has a dedicated resource pool for LP-WUR including LP-WUS, LP-RR and LP-SS. The sidelink BWP LP-WUR configuration 505 may include a resource pool configuration 510 for LP-WUR, SCS, bandwidth, position A and guard band. The resource pool configuration 510 may include a transmit resource pool for mode 1, a transmit resource pool for mode 2, and a receiver resource pool 515. The per-resource-pool configuration 520 may include PSCCH when LP-RS is reserved, PSCCH (reserving one or more LP-RS or LP-WUS configurations and one or more LP-RS and LP-WUS configuration number symbols, combination type, comb offset, number of subchannels, subchannel size, starting RB, bitmap of RE / RB / PRS used for LP-RS, number of repetitions across time slots or within time slots, CBR, MSC, sensing configuration, and power control).

[0152] Figure 6 An example of a configuration diagram 600 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. Configuration diagram 400 may implement aspects of wireless communication system 100 and wireless communication system 300.

[0153] Configuration diagram 600 illustrates an example sidelink configuration or pre-configuration in NR for sidelink communication between UEs 115 via a sidelink communication link 135. In some examples, the configuration includes a dedicated resource pool for LP-WUR within the BWP. The configuration identifies a sidelink frequency configuration 405-b. The sidelink frequency configuration 405-b may include point A 410-b (the lowest frequency subband of the sidelink frequency), a sidelink BWP configuration 430-b, a PSBCH configuration 415-b, and an SCS specific carrier list 420-b. The SCS specific carrier list 420-b may include an SCS specific configuration 425-b for bandwidth or location. The sidelink BWP configuration 430-b may include a BWP general configuration 435-b with bandwidth and location, SCS and CP, and time domain resources 440-b. The sidelink BWP configuration 430-b may also include a resource pool configuration 445-b. Resource pool configuration 445-b may include a transmit resource pool for mode 1, a resource pool for mode 2, and a receiver resource pool 450-b. Per-resource pool configuration 605 may include a dedicated resource pool for LP-WUR within the BWP. In some examples, per-resource pool configuration 605 may include PSSCH, PSCCH, PSFCH and LP-WUR configuration, number of subchannels, subchannel size, starting RB, CBR, MCS, sensing configuration, and power control.

[0154] Figure 7 An example of a configuration diagram 700 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. Configuration diagram 400 may implement aspects of wireless communication system 100 and wireless communication system 300.

[0155] Configuration diagram 700 illustrates an example sidelink configuration or pre-configuration in NR for sidelink communication between UEs 115 via a sidelink communication link 135. In some examples, the configuration includes a dedicated sub-resource pool (portion of a resource pool) for LP-WUR on each resource pool within a BWP. The configuration identifies a sidelink frequency configuration 405-c. The sidelink frequency configuration 405-c may include point A 410-c (the lowest frequency subband of the sidelink frequency), a sidelink BWP configuration 430-c, a PSBCH configuration 415-c, and an SCS specific carrier list 420-c. The SCS specific carrier list 420-c may include an SCS specific configuration 425-c for bandwidth or location. The sidelink BWP configuration 430-c may include a BWP general configuration 435-c with bandwidth and location, SCS and cyclic prefix (CP), and time domain resources 440-c. The sidelink BWP configuration 430-c may also include a resource pool configuration 445-c. The resource pool configuration 445-c may include a transmit resource pool for mode 1, a resource pool for mode 2, and a receiver resource pool 450-c. The resource pool configuration 455-c may include PSSCH, PSCCH, and PSFCH configurations, number of subchannels, subchannel size, starting RB, CBR, MSC, sensing configuration, and power control. In some examples, the resource pool configuration 445-c may include a dedicated sub-resource pool (portion of a resource pool) for LP-WUR on each resource pool within the BWP. For example, the resource pool configuration 445-c may include a LP-WUR transmit resource pool for mode 1, a LP-WUR transmit resource pool for mode 2, and a LP-WUR receiver resource pool 705. The resource pool configuration 710 may include a PSCCH with one or more LP-RS or LP-WUS configurations, a PSFCH when the LP-RS is reserved, one or more LP-RS and LP-WUS configurations, guard bands, the number of symbols, a combination offset, the number of subchannels, the subchannel size, a starting RB, a bitmap of resource elements (REs) used for the LP-RS, RBs or physical resource groups (PRGs), the number of repetitions across time slots or within time slots, CBR, sensing configuration, and power control.

[0156] In some examples, the LP-WUR shares a resource pool with the primary radio 210 of the UE 115. In some examples, the sidelink resource configuration may be per UE class or type, with different configurations used for different types of UEs. Different types of UEs may be pre-configured or based on defined specifications to support low power wake-up radios with different resource configurations including SCS and bandwidth.

[0157] In some examples, resource configuration by resource pool may include LP-RS configuration and monitoring opportunities similar to CSI-RS or TRS. Resource configuration by resource pool may include LP-SS configuration and monitoring opportunities similar to SSB for primary radio. Resource configuration by resource pool may include LP-WUS configuration and monitoring opportunities. In some examples, resource configuration by resource pool may include partitioning of resource pool and sub-resource pool configurations.

[0158] In some examples, resource configuration for LP-WUR can be preconfigured per UE category or across all UE categories. In some examples, the UE category can provide information about the wake-up radio 205 included in the UE category, as well as some default loaded or preconfigured resource pools, sub-resource pools, and / or BWPs for LP-WUR per UE category.

[0159] In some examples, based on the power consumption and complexity of the wake-up radio 205, the UE 115 may indicate the capability of how many LP-WUR resource pools or sub-resource pools the UE 115 can support at a given time. In some examples, the UE 115 may have only one LP-WUR resource pool or one sub-resource pool. The capability of how many LP-WUR resource pools or sub-resource pools may be initially determined by UE category. In some examples, the UE 115 may indicate the capability to the network entity 105, and the network entity 105 may communicate the capability of the UE 115 to other UEs 115 that may be communicating with the UE 115. In some examples, if the wake-up radio receiver has a transmitting component, the UE 115 may share the capability of the UE 115 with other UEs 115 during the RRC connection or via the main radio 210 or via the wake-up radio 205 in the form of L1 / L2 / L3 signaling.

[0160] In some examples, the LP-WUS may instruct the UE 115 to wake up the primary radio 210 (Uu modem) in the Uu link. For example, the sidelink communication may be used to wake up the UE for the Uu link, or the sidelink communication may be used for UE-to-UE communication, or both. In some examples, there may be dedicated resources or signals to monitor to wake up the Uu modem / interface to the sidelink modem / interface.

[0161] In some examples, LP-RS may be enabled or disabled per resource pool or per sub-resource pool. In some examples, LP-SS may be enabled or disabled per resource pool or per sub-resource pool. Similar to SSB, LP-SS may be outside of any resource pool or outside of times dedicated to resource pools with dedicated locations. In some examples, when UE 115 is in sleep mode (light or deep), UE 115 may deactivate all resource pools or most resource pools and monitor one or more of the LP-WUS resource pools.

[0162] In some examples, a UE 115 in connected mode may monitor LP-WUS on several resource pools, where each resource pool has its own LP-WUS configuration, LP-RS configuration, and LP-SS configuration, which may include different waveforms, repetitions, periodicities, and / or coding.

[0163] In some examples, each pair of UEs 115 may agree on a LP-WUR configuration that includes one or more of the DRX configurations for waking up the radio 205 for performing sidelink or Uu communications. For example, the DRX configuration may include a DRX cycle duration / periodicity and a DRX active time / on duration. A DRX cycle may refer to a cycle of on / active time and off / external active time.

[0164] UE 115 may be configured with two DRX configurations, one of which is used to monitor wake-up signals for sidelink communications / interfaces and the other DRX configuration is used to monitor wake-up signals for Uu link communications. In some examples, the sidelink and Uu DRX configurations may be aligned or may be identical. That is, the DRX configuration for the LP-WUS monitoring timing for the sidelink and the DRX configuration for the Uu link may be aligned for both the sidelink and the Uu link to reduce the complexity of the search at the LP-WUS (e.g., waking up the radio 205) (e.g., to achieve reduced power consumption and reduced complexity). In some examples, when an indication to wake up the main radio 210 for the sidelink interface or to wake up the main radio 210 to operate the Uu link / interface is received from another UE 115, there may be similar or different monitoring timings and DRXs for searching for the indication.

[0165] In some examples, the side link resource pool configuration or sub-resource pool configuration may include two groups of configurations, one configuration for waking up the Uu link / interface and the other configuration for waking up the side link or PC5 link / interface. The DRX configurations of the two configurations (if the two configurations are not aligned) may be the same or different. The configuration of the signal type and the low-power signal (LP-WUR, LP-RS and LP-SS) configuration may be the same or different for the two groups of configurations for waking up the Uu and side link. In some examples, the protection band for the reliability of the auxiliary received signal may be the same or different for the two groups of configurations. In some cases, based on the underlying business, the Uu wake-up may have a higher or lower priority than the side link. These configurations may affect both the side link UE 115 that wakes up another UE 115 equipped with the wake-up radio 205 (because the UE 115 will have to transmit different low-power signals while following the configuration) and the UE 115 equipped with the wake-up radio 205. In some examples, two monitoring opportunities and DRX cycles and signal configurations may be aligned with similar configurations.

[0166] In some examples, all configurations of LP signals (e.g., LP-WUS, LP-RS, LP-SS) used to wake up the UE on the Uu link or the side link and the DRX configuration may depend on the RRC state / mode of the UE 115 on the Uu link, the side link, or both. In some examples, the UE 115 may be configured with the following three DRX configurations: a first DRX configuration for monitoring a wake-up signal from another UE 115 to wake up the UE 115 for Uu link communication, wherein the DRX configuration is monitored when the UE 115 is in RRC connection in the Uu link; a second DRX configuration for the case where the UE 115 is in RRC inactive mode / state; and a third DRX configuration for the case where the UE 115 is in RRC idle mode / state. At the resource pool level or sub-resource pool level configuration, the UE 115 may be configured with a DRX configuration for each RRC state of the Uu link. Additionally or alternatively, in a similar manner, configured at a resource pool or sub-resource pool level, UE 115 may be configured with three DRX configurations for monitoring the sidelink wake-up signal to be awakened for communication between UE 115 and other UEs 115 when UE 115 is in each RRC state for a PC5 link / interface or a sidelink between two UEs 115. In some cases, all LP signals may be configured differently based on the RRC state of the associated interface.

[0167] In some examples, the configuration of the LP-WUS, LP-RS, and / or LP-SS may include a scrambling identifier (ID) to be used for the following (e.g., for each resource pool or sub-resource pool, and in each RRC state (e.g., connected / inactive / idle)): generating a sequence for the LP-WUS, LP-RS, and / or LP-SS; determining the sequence with respect to the LP-RS and / or LP-SS; or scrambling a payload for the LP-WUS to determine whether the payload is for a specific UE 115 (to be woken up). Based on whether the LP-WUS is for Uu wakeup or for sidelink wakeup, the scrambling ID may be different (e.g., unless the DRX configurations for Uu wakeup and for sidelink wakeup are aligned and the same WUS opportunity is used for Uu wakeup and for sidelink wakeup). For the LP-WUS, the scrambling ID may be a radio network temporary identifier of the UE 115.

[0168] Figure 8 An example of a resource map 800 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The resource map 800 can implement aspects of the wireless communication system 100 or the wireless communication system 300.

[0169] Resource map 800 illustrates an example sidelink resource configuration for LP-WUR. Resource map 800 includes resource pool 805, LP-WUR sub-resource pool 810, and main radio sub-resource pool 815. Resource map also includes main radio sub-resource pools 820 and 830 separated from LP-WUR sub-resource pool 825 by guard band 835.

[0170] In some examples, each pair of UEs 115 for sidelink communication may have its own LP-WUR configuration, which includes one or more resource pools or sub-resource pools or BWPs for the LP-WUR. The guard band 835 for the LP-WUR may be defined by resource pool through configuration from the network entity 105. In some examples, the network entity 105 may configure the guard band 835 based on the use of the resource pool by the UE 115. In some examples, the network entity 105 signals the guard band 835 configuration to each UE 115. In some examples, the guard band 835 configuration may be negotiated between the UEs 115 during the RRC connection or through L1 / L2 / L3 signaling. The guard band 835 may be resource element granularity, or RB granularity, or subchannel granularity. The subchannel granularity may be lower than or equal to the current granularity of the side link in terms of RB. In some examples, the subchannel size may be preconfigured or configured to {10, 15, 20, 35, 50, 75, 100} physical resource blocks (PRBs).

[0171] In some examples, the LP-WUS / LP-RS / LP-SS configuration among the set of configurations per resource pool or per sub-resource pool may be indicated with an indication based on the definition of the waveform supporting the LP-WUS. The LP-WUS may also carry the indication, or the primary radio 210 may send the indication during the on-time of the primary radio 210. In some examples, the indication is a sequence-based sidelink control information (SCI) indication indicating one or more of the LP-WUS / LP-RS / LP-SS configurations (e.g., OOK carried on a waveform such as a single carrier or OFDM or based on OFDM such as the current NR waveform). In some examples, the PSSCH symbol may carry LP-RS or LP-SS.

[0172] Fig. 9 An example of a resource map 900 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The resource map 800 can implement aspects of the wireless communication system 100 or the wireless communication system 300.

[0173] Resource diagram 800 illustrates an example of a sidelink communication resource configuration. Sidelink communications may occur in transmit and receive resource pools. The minimum resource allocation unit may be a subchannel 905 in frequency, and the minimum resource allocation in time may be a time slot 910. In some examples, some time slots are not available for the sidelink, and some time slots contain feedback resources. The RRC configuration of the resources may be preconfigured (e.g., preloaded on UE 115) or configured by the network entity 105. For sidelink communications, four physical sidelink channels may be defined: PSCCH, PSSCH, PSFCH, and PSBCH. For sidelink communications, multiple reference signals may be defined: DMRS for PSCCH, DMRS for PSSCH, DMRS for PSBCH, CSI-RS, primary synchronization signal (S-PSS) for FR2, secondary synchronization signal (S-SSS), and phase tracking reference signal (PTRS).

[0174] Fig.10 An example of a slot format 1000 that supports low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The slot format 1000 can implement aspects of the wireless communication system 100 or the wireless communication system 300.

[0175] Slot format 1000 illustrates an example slot format for sidelink communication. The slot includes 14 OFDM symbols. In some examples, for sidelink communication, the slot may be preconfigured or configured to occupy less than 14 symbols. The first symbol 0 may be repeated on the previous symbol for automatic gain control (AGC) settings. For a slot structure without feedback resources, the PSSCH may be in symbols 1-12, with gap symbols present after the PSSCH. As shown, the PSCCH may be in symbols 1-3. PSCCH and PSSCH may be sent in the same slot. The subchannel size may be preconfigured or configured to {10, 15, 20, 25, 50, 75, 100} PRBs. PSCCH and PSSCH may be sent in the same slot. For a slot structure with feedback resources, the PSSCH may be in symbols 1-9, with gap symbols present after the PSSCH. The PSFCH may be in symbols 11-12, with gap symbols in symbol 13 and spaced symbols in symbol 10. Resources for PSFCH may be configured with a period of {0,1,2,4} time slots. The PSFCH symbol may be a repetition of the second symbol used for AGC settings. The PSCCH duration may be preconfigured or configured to 2 or 3 symbols, the PSCCH may be preconfigured or configured to span {10,12,15,20,25} PRBs, and may be restricted to a single subchannel. DMRS may be present in every PSCCH symbol and may be placed on every 4th RE. Frequency domain orthogonal cover codes (FD-OCC) may be applied to DMRS to reduce the impact of conflicting PSCCH transmissions (e.g., the transmitting UE may randomly select from a set of predefined FD-OCCs). The starting symbol for PSCCH may be the second symbol in the time slot.

[0176] In some examples, for forward compatibility, SCI can be two-level. The first level control (SCI-1) can be sent on the PSCCH and may include information for resource allocation and decoding of the second level control. The second level control (SCI-2) can be sent on the PSSCH and may include information for decoding data (on the PSSCH). Both SCI-1 and SCI-2 can use PDCCH polarization codes. The SCI-1 content may include priority information (quality of service (QoS) value), PSSCH resource assignment (frequency / time resources for PSSCH), resource reservation period (if enabled), PSSCH DMRS mode (if more than one mode is preconfigured or configured), the second SCI format (e.g., information about the size of the second SCI), 2-bit β offset for level 2 control resource assignment, the number of PSSCH DMRS ports: 1 or 2, and 5-bit MCS.

[0177] Fig.11An example of a process flow 1100 for supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is illustrated. The process flow 1100 may include a first UE 115-d and a second UE 115-e, which may be examples of UE 115 as described herein. The process flow 1100 may include a network entity 105-b, which may be an example of a network entity 105 as described herein. In the following description of the process flow 1100, operations between the network entity 105-b and the first UE 115-d and the second UE 115-e may be sent in an order different from the example order shown, or operations performed by the network entity 105-b and the first UE 115-d and the second UE 115-e may be performed in a different order or at a different time. Some operations may also be omitted from the process flow 1100, and other operations may be added to the process flow 1100.

[0178] At 1105, the network entity 105-b may receive an indication of a UE type of the first UE 115-d from the first UE 115-d.

[0179] At 1110, the first UE 115-d and the second UE 115-e may receive control signaling from the network entity 105-b indicating a configuration associated with a set of sidelink communication resources for receiving signaling via a wake-up radio of the first UE 115-d when a primary radio (e.g., the first radio) of the first UE 115-d is in a sleep mode. In some examples, the configuration is based on an indication of a UE type.

[0180] At 1115 , the first UE 115 - d may receive a signal from the second UE 115 - e via a set of sidelink communications resources according to the configuration while the primary radio of the first UE 115 - d is in sleep mode.

[0181] In some examples, at 1120, based on receiving a signal via the wake-up radio at 1115 and the signal being a wake-up signal, the first UE 115-d may communicate with one of the network entity 105-b or the second UE 115-e via the primary radio. In some examples, the first UE 115-d may receive from the network entity 105-b an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs. In some examples, the first UE 115-d may communicate with the network entity 105-b or the second UE 115-e based on receiving the signal via the first subset or the second subset at 1115. In some examples, the first UE 115-d may receive from the network entity 105-b an indication of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0182] In some examples, a first DRX configuration associated with the first subset is associated with a first RRC state between the first UE and the network entity (e.g., connected mode of the Uu link), a second DRX configuration associated with the first subset is associated with a second RRC state between the first UE and the network entity (e.g., inactive mode of the Uu link), a third DRX configuration associated with the first subset is associated with a third RRC state between the first UE and the network entity (e.g., idle mode of the Uu link), a fourth DRX configuration associated with the second subset is associated with a fourth RRC state between the first UE and the second UE (e.g., connected mode of the side link / PC5), a fifth DRX configuration associated with the second subset is associated with a fifth RRC state between the first UE and the second UE (e.g., inactive mode of the side link / PC5), and a sixth DRX configuration associated with the second subset is associated with a sixth RRC state between the first UE and the second UE (e.g., idle mode of the side link / PC5).

[0183] In some examples, the first UE 115-d may receive an indication of a configuration by resource pool from the network entity 105-b, wherein the sidelink communication resource set includes a resource pool from a set of multiple resource pools associated with a BWP associated with sidelink communications of the first UE 115-d.

[0184] In some examples, the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0185] In some examples, the first UE 115-d may receive a second signal from a third UE via a wake-up radio via a default resource pool configured according to a default configuration while the primary radio is in a sleep mode.

[0186] In some examples, the first UE 115-d may send an indication of a number of resource pools that the first UE 115-d is capable of supporting via the wake-up radio, and the configuration received at 1110 is based on the indication of the number of resource pools that the first UE 115-d is capable of supporting via the wake-up radio.

[0187] In some examples, the first UE 115-d may receive an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to a sidelink communications resource set.

[0188] In some examples, the first UE 115-d may receive an indication that a synchronization signal is enabled for a resource pool corresponding to the sidelink communications resource set, and the synchronization signal is located outside of the resource pool.

[0189] In some examples, the first UE 115-d may receive an indication of a set of multiple resource pools for sidelink communications, wherein the set of sidelink communications resources includes a resource pool from the set of multiple resource pools, and when the first radio is in a sleep mode, the first UE deactivates monitoring of each resource pool in the set of multiple resource pools except for the resource pool.

[0190] In some examples, the first UE 115-d may receive an indication that the configuration is associated with the second UE 115-e.

[0191] In some examples, the first UE 115-d may receive an indication that the configuration is associated with a first sub-resource pool of a resource pool for sidelink communications, wherein the sidelink communications resource set includes the first sub-resource pool and a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool. In some examples, the first UE 115-d may utilize control signaling to receive an indication of a set of multiple configurations associated with the sidelink communications resource set. In some examples, the first UE 115-d may receive second control signaling from the second UE 115-e indicating a configuration from the set of multiple configurations.

[0192] Fig.12 A block diagram 1200 of a device 1205 supporting low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is shown. The device 1205 may be an example of aspects of the UE 115 as described herein. The device 1205 may include a receiver 1210, a transmitter 1215, and a communication manager 1220. The device 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0193] The receiver 1210 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels related to low power wake-up radios in sidelink communications, data channels, information channels). The information may be communicated to other components of the device 1205. The receiver 1210 may utilize a single antenna or a set of multiple antennas.

[0194] The transmitter 1215 may provide means for transmitting signals generated by other components of the device 1205. For example, the transmitter 1215 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radios in sidelinks) such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 1215 may be co-located with the receiver 1210 in a transceiver module. The transmitter 1215 may utilize a single antenna or a set of multiple antennas.

[0195] The communication manager 1220, the receiver 1210, the transmitter 1215, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the low power wake-up radio in the sidelink communication as described herein. For example, the communication manager 1220, the receiver 1210, the transmitter 1215, or various combinations thereof or components thereof may support methods for performing one or more of the functions described herein.

[0196] In some examples, the communication manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0197] Additionally or alternatively, in some examples, the communication manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0198] In some examples, communication manager 1220 may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 1210, transmitter 1215, or both. For example, communication manager 1220 may receive information from receiver 1210, transmit information to transmitter 1215, or be integrated in conjunction with receiver 1210, transmitter 1215, or both to obtain information, output information, or perform various other operations as described herein.

[0199] According to examples as disclosed herein, the communication manager 1220 may support wireless communication at the first UE. For example, the communication manager 1220 may be configured to or otherwise support a component for receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The communication manager 1220 may be configured to or otherwise support a component for receiving a signal via a wake-up radio from a second UE via a sidelink communication resource set according to the configuration when the first radio is in a sleep mode.

[0200] Additionally or alternatively, according to examples as disclosed herein, the communication manager 1220 may support wireless communication at the second UE. For example, the communication manager 1220 may be configured to or otherwise support a component for receiving control signaling from a network entity, the control signaling indicating a configuration associated with a sidelink communication resource set for signaling to the first UE when the first radio of the first UE is in sleep mode. The communication manager 1220 may be configured to or otherwise support a component for sending a signal to the first UE via the sidelink communication resource set according to the configuration.

[0201] By including or configuring a communications manager 1220 according to examples as described herein, a device 1205 (e.g., a processor controlling a receiver 1210, a transmitter 1215, a communications manager 1220, or a combination thereof or otherwise coupled thereto) may support techniques for more efficiently utilizing communications resources.

[0202] Fig.13 A block diagram 1300 of a device 1305 supporting low power wake-up radio in side link communications according to one or more aspects of the present disclosure is shown. The device 1305 may be an example of aspects of the device 1205 or UE 115 as described herein. The device 1305 may include a receiver 1310, a transmitter 1315, and a communication manager 1320. The device 1305 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0203] The receiver 1310 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels related to low power wake-up radios in sidelink communications, data channels, information channels). The information may be communicated to other components of the device 1305. The receiver 1310 may utilize a single antenna or a set of multiple antennas.

[0204] The transmitter 1315 may provide means for transmitting signals generated by other components of the device 1305. For example, the transmitter 1315 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radios in sidelinks) such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 1315 may be co-located with the receiver 1310 in a transceiver module. The transmitter 1315 may utilize a single antenna or a set of multiple antennas.

[0205] Device 1305 or its various components may be examples of components for performing various aspects of low-power wake-up radio in sidelink communications as described herein. For example, communication manager 1320 may include sidelink communication resource configuration manager 1325, sidelink communication manager 1330, or any combination thereof. Communication manager 1320 may be an example of various aspects of communication manager 1220 as described herein. In some examples, communication manager 1320 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 1310, transmitter 1315, or both. For example, communication manager 1320 may receive information from receiver 1310, transmit information to transmitter 1315, or integrate with receiver 1310, transmitter 1315, or both in combination to obtain information, output information, or perform various other operations as described herein.

[0206] According to examples as disclosed herein, the communication manager 1320 may support wireless communication at the first UE. The sidelink communication resource configuration manager 1325 may be configured to or otherwise support components for receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The sidelink communication manager 1330 may be configured to or otherwise support components for receiving a signal via a wake-up radio from a second UE via a sidelink communication resource set according to the configuration when the first radio is in a sleep mode.

[0207] Additionally or alternatively, according to examples as disclosed herein, the communication manager 1320 may support wireless communication at the second UE. The sidelink communication resource configuration manager 1325 may be configured to or otherwise support components for receiving control signaling from a network entity, the control signaling indicating a configuration associated with a set of sidelink communication resources for signaling to the first UE when the first radio of the first UE is in sleep mode. The sidelink communication manager 1330 may be configured to or otherwise support components for sending a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0208] Fig.14A block diagram 1400 of a communication manager 1420 supporting low power wake-up radio in side link communications according to one or more aspects of the present disclosure is shown. The communication manager 1420 may be an example of aspects of the communication manager 1220, the communication manager 1320, or both as described herein. The communication manager 1420 or its various components may be examples of components for performing various aspects of low power wake-up radio in side link communications as described herein. For example, the communication manager 1420 may include a side link communication resource configuration manager 1425, a side link communication manager 1430, a wake-up manager 1435, a resource pool configuration manager 1440, a UE type manager 1445, a default resource pool manager 1450, a resource pool capability manager 1455, a signal type manager 1460, a resource pool deactivation manager 1465, a UE configuration manager 1470, a sub-resource pool configuration manager 1475, a multi-configuration manager 1480, a selected configuration manager 1485, a UE configuration manager 1490, a wake-up communication resource manager 1495, a DRX configuration manager 1496, or any combination thereof. Each of these components may be in communication with each other, directly or indirectly (eg, via one or more buses).

[0209] According to examples as disclosed herein, the communication manager 1420 may support wireless communication at the first UE. The sidelink communication resource configuration manager 1425 may be configured to or otherwise support components for receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The sidelink communication manager 1430 may be configured to or otherwise support components for receiving a signal via a wake-up radio from a second UE via a sidelink communication resource set according to the configuration when the first radio is in a sleep mode.

[0210] In some examples, wake-up manager 1435 may be configured or otherwise support components for communicating with one of a network entity or a second UE via the first radio based on receiving a signal via the wake-up radio, wherein the signal includes a wake-up signal.

[0211] In some examples, to support receiving control signaling, the wake-up communication resource manager 1495 may be configured as or otherwise support components for receiving indications of a first subset of a sidelink communication resource set associated with a wake-up signal for communicating with a network entity and a second subset of a sidelink communication resource set associated with a wake-up signal for communicating with other UEs, and wherein communication with one of the network entity or the second UE is based on signals received via the first subset or the second subset.

[0212] In some examples, a first DRX configuration associated with the first subset is associated with a first RRC state between the first UE and the network entity, a second DRX configuration associated with the first subset is associated with a second RRC state between the first UE and the network entity, a third DRX configuration associated with the first subset is associated with a third RRC state between the first UE and the network entity, a fourth state associated with the second subset is associated with a fourth RRC state between the first UE and the second UE, a fifth DRX configuration associated with the second subset is associated with a fifth RRC state between the first UE and the second UE, and a sixth DRX configuration associated with the second subset is associated with a sixth RRC state between the first UE and the second UE.

[0213] In some examples, to support receiving control signaling, the DRX configuration manager 1496 may be configured as or otherwise support components for receiving indications of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0214] In some examples, to support receiving control signaling, resource pool configuration manager 1440 may be configured as or otherwise support components for receiving indications of a configuration by resource pool, wherein the side link communication resource set includes a resource pool from a set of multiple resource pools associated with a BWP associated with the side link communication of the first UE.

[0215] In some examples, UE type manager 1445 may be configured or otherwise support components for sending an indication of a UE type for a first UE to a network entity, where the configuration is based on the UE type.

[0216] In some examples, the sidelink communication resource set includes a resource pool. In some examples, the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0217] In some examples, default resource pool manager 1450 may be configured or otherwise support components for receiving a second signal from a third UE via a default resource pool according to a default configuration via a wake-up radio when the first radio is in a sleep mode.

[0218] In some examples, resource pool capability manager 1455 may be configured or otherwise support components for sending an indication of a number of resource pools that the UE is capable of supporting via the wake-up radio, where the configuration is based on the indication of the number of resource pools that the UE is capable of supporting via the wake-up radio.

[0219] In some examples, to support receiving control signaling, signal type manager 1460 may be configured or otherwise support components for receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to a sidelink communication resource set.

[0220] In some examples, to support receiving control signaling, signal type manager 1460 may be configured or otherwise support components for receiving an indication that a synchronization signal is enabled for a resource pool corresponding to a sidelink communication resource set, where the synchronization signal is located outside of the resource pool.

[0221] In some examples, to support receiving control signaling, resource pool deactivation manager 1465 may be configured as or otherwise support components for receiving an indication of a set of multiple resource pools for sidelink communications, wherein the sidelink communications resource set includes resource pools from the set of multiple resource pools, and wherein when the first radio is in a sleep mode, the first UE deactivates monitoring of each resource pool in the set of multiple resource pools except for the resource pool.

[0222] In some examples, to support receiving control signaling, UE configuration manager 1470 may be configured or otherwise support components for receiving an indication that the configuration is associated with a second UE.

[0223] In some examples, to support receiving control signaling, the sub-resource pool configuration manager 1475 may be configured as or otherwise support components for receiving an indication that the configuration is associated with a first sub-resource pool of a resource pool for side link communications, wherein the side link communications resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0224] In some examples, multiple configuration manager 1480 may be configured or otherwise support components for receiving, using control signaling, an indication of a set of multiple configurations associated with a sidelink communication resource set, the set of multiple configurations including the configuration. In some examples, selected configuration manager 1485 may be configured or otherwise support components for receiving, from a second UE, a second control signaling indicating a configuration from the set of multiple configurations.

[0225] Additionally or alternatively, according to examples as disclosed herein, the communication manager 1420 may support wireless communication at the second UE. In some examples, the sidelink communication resource configuration manager 1425 may be configured to or otherwise support components for receiving control signaling from a network entity, the control signaling indicating a configuration associated with a set of sidelink communication resources for signaling to the first UE when the first radio of the first UE is in sleep mode. In some examples, the sidelink communication manager 1430 may be configured to or otherwise support components for sending a signal to the first UE via the set of sidelink communication resources according to the configuration.

[0226] In some examples, wake-up manager 1435 may be configured or otherwise support components for communicating with the first UE based on sending the signal, where the signal includes a wake-up signal.

[0227] In some examples, to support receiving control signaling, the wake-up communication resource manager 1495 may be configured as or otherwise support components for receiving indications of a first subset of a sidelink communication resource set associated with a wake-up signal for communicating with a network entity and a second subset of a sidelink communication resource set associated with a wake-up signal for communicating with other UEs, and wherein communication with the first UE is based on the signal being sent via the second subset.

[0228] In some examples, to support receiving control signaling, the DRX cycle manager 1496 may be configured or otherwise support components for receiving indications of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0229] In some examples, to support receiving control signaling, resource pool configuration manager 1440 may be configured as or otherwise support components for receiving indications of a configuration by resource pool, wherein the side link communication resource set includes a resource pool from a set of multiple resource pools associated with a BWP associated with the side link communication of the first UE.

[0230] In some examples, the sidelink communication resource set includes a resource pool. In some examples, the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0231] In some examples, to support receiving control signaling, signal type manager 1460 may be configured or otherwise support components for receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to a sidelink communication resource set.

[0232] In some examples, to support receiving control signaling, signal type manager 1460 may be configured or otherwise support components for receiving an indication that a synchronization signal is enabled for a resource pool corresponding to a sidelink communication resource set, where the synchronization signal is located outside of the resource pool.

[0233] In some examples, to support receiving control signaling, resource pool deactivation manager 1465 may be configured as or otherwise support components for receiving an indication of a set of multiple resource pools for sidelink communications, wherein the sidelink communications resource set includes a resource pool from the set of multiple resource pools.

[0234] In some examples, to support receiving control signaling, UE configuration manager 1490 may be configured or otherwise support components for receiving an indication that the configuration is associated with the first UE.

[0235] In some examples, to support receiving control signaling, the sub-resource pool configuration manager 1475 may be configured as or otherwise support components for receiving an indication that the configuration is associated with a first sub-resource pool of a resource pool for side link communications, wherein the side link communications resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0236] In some examples, multiple configuration manager 1480 may be configured or otherwise support means for receiving, using control signaling, an indication of a set of multiple configurations associated with a sidelink communication resource set, the set of multiple configurations including the configuration. In some examples, selected configuration manager 1485 may be configured or otherwise support means for sending, to the first UE, a second control signaling indicating a configuration from the set of multiple configurations.

[0237] Fig.15A diagram of a system 1500 including a device 1505 supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is shown. The device 1505 may be an example of a device 1205, a device 1305, or a UE 115 as described herein, or include components of these devices. The device 1505 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 1505 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 1520, an input / output (I / O) controller 1510, a transceiver 1515, an antenna 1525, a memory 1530, a code 1535, and a processor 1540. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1545).

[0238] I / O controller 1510 can manage input and output signals for device 1505. I / O controller 1510 can also manage peripheral devices that are not integrated into device 1505. In some cases, I / O controller 1510 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1510 can utilize an operating system such as or another known operating system. Additionally or alternatively, I / O controller 1510 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1510 may be implemented as part of a processor such as processor 1540. In some cases, a user may interact with device 1505 via I / O controller 1510 or via hardware components controlled by I / O controller 1510.

[0239] In some cases, the device 1505 may include a single antenna 1525. However, in some other cases, the device 1505 may have more than one antenna 1525, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1515 may communicate bidirectionally via one or more antennas 1525, a wired link, or a wireless link as described herein. For example, the transceiver 1515 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1515 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 1525 for transmission, and demodulating packets received from one or more antennas 1525. The transceiver 1515, or the transceiver 1515 and one or more antennas 1525 may be examples of transmitters 1215, transmitters 1315, receivers 1210, receivers 1310, or any combination thereof or any components thereof as described herein.

[0240] Memory 1530 may include random access memory (RAM) and read-only memory (ROM). Memory 1530 may store computer-readable, computer-executable code 1535 including instructions that, when executed by processor 1540, cause device 1505 to perform various functions described herein. Code 1535 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1535 may not be directly executable by processor 1540, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1530 may also contain, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0241] Processor 1540 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1540 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1540. Processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) to enable device 1505 to perform various functions (e.g., functions or tasks to support low-power wake-up radio in sidelink communications). For example, device 1505 or a component of device 1505 may include processor 1540 and memory 1530 coupled to or coupled to processor 1540, and processor 1540 and memory 1530 are configured to perform the various functions described herein.

[0242] According to examples as disclosed herein, the communication manager 1520 may support wireless communication at the first UE. For example, the communication manager 1520 may be configured to or otherwise support a component for receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The communication manager 1520 may be configured to or otherwise support a component for receiving a signal via a wake-up radio from a second UE via a sidelink communication resource set according to the configuration when the first radio is in a sleep mode.

[0243] Additionally or alternatively, according to examples as disclosed herein, the communication manager 1520 may support wireless communication at the second UE. For example, the communication manager 1520 may be configured to or otherwise support a component for receiving control signaling from a network entity, the control signaling indicating a configuration associated with a sidelink communication resource set for signaling to the first UE when the first radio of the first UE is in sleep mode. The communication manager 1520 may be configured to or otherwise support a component for sending a signal to the first UE via the sidelink communication resource set according to the configuration.

[0244] By including or configuring a communication manager 1520 according to the examples described herein, the device 1505 can support techniques for reducing latency, reducing power consumption, more efficiently utilizing communication resources, improving coordination between devices, extending battery life, and improving utilization of processing power.

[0245] In some examples, the communication manager 1520 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the transceiver 1515, one or more antennas 1525, or any combination thereof. Although the communication manager 1520 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1520 may be supported or performed by the processor 1540, the memory 1530, the code 1535, or any combination thereof. For example, the code 1535 may include instructions executable by the processor 1540 to cause the device 1505 to perform various aspects of the low power wake-up radio in the side link communication as described herein, or the processor 1540 and the memory 1530 may be otherwise configured to perform or support such operations.

[0246] Fig.16A block diagram 1600 of a device 1605 supporting low power wake-up radio in side link communications according to one or more aspects of the present disclosure is shown. The device 1605 may be an example of aspects of the network entity 105 as described herein. The device 1605 may include a receiver 1610, a transmitter 1615, and a communication manager 1620. The device 1605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0247] Receiver 1610 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of device 1605. In some examples, receiver 1610 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1610 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0248] The transmitter 1615 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 1605. For example, the transmitter 1615 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1615 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1615 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1615 and the receiver 1610 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0249] The communication manager 1620, the receiver 1610, the transmitter 1615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the low power wake-up radio in the sidelink communication as described herein. For example, the communication manager 1620, the receiver 1610, the transmitter 1615, or various combinations thereof or components thereof may support methods for performing one or more of the functions described herein.

[0250] In some examples, the communication manager 1620, the receiver 1610, the transmitter 1615, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0251] Additionally or alternatively, in some examples, the communication manager 1620, the receiver 1610, the transmitter 1615, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 1620, the receiver 1610, the transmitter 1615, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functionality described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0252] In some examples, communication manager 1620 may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 1610, transmitter 1615, or both. For example, communication manager 1620 may receive information from receiver 1610, transmit information to transmitter 1615, or be integrated in conjunction with receiver 1610, transmitter 1615, or both to obtain information, output information, or perform various other operations as described herein.

[0253] According to examples as disclosed herein, the communication manager 1620 may support wireless communications at a network entity. For example, the communication manager 1620 may be configured as or otherwise support a component for receiving an indication of a UE type of the first UE from a first UE. The communication manager 1620 may be configured as or otherwise support a component for sending control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0254] By including or configuring a communications manager 1620 according to examples as described herein, a device 1605 (e.g., a processor controlling a receiver 1610, a transmitter 1615, a communications manager 1620, or a combination thereof or otherwise coupled thereto) may support techniques for reducing power consumption and more efficiently utilizing communications resources.

[0255] Fig.17 A block diagram 1700 of a device 1705 supporting low power wake-up radio in side link communications according to one or more aspects of the present disclosure is shown. The device 1705 may be an example of aspects of the device 1605 or the network entity 105 as described herein. The device 1705 may include a receiver 1710, a transmitter 1715, and a communication manager 1720. The device 1705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0256] Receiver 1710 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be delivered to other components of device 1705. In some examples, receiver 1710 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1710 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0257] The transmitter 1715 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 1705. For example, the transmitter 1715 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1715 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1715 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1715 and the receiver 1710 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0258] Device 1705 or its various components may be examples of components for performing various aspects of low-power wake-up radio in sidelink communications as described herein. For example, communication manager 1720 may include UE type manager 1725, sidelink communication resource configuration manager 1730, or any combination thereof. Communication manager 1720 may be an example of various aspects of communication manager 1620 as described herein. In some examples, communication manager 1720 or its various components may be configured to use or otherwise cooperate with receiver 1710, transmitter 1715, or both to perform various operations (e.g., receive, obtain, monitor, output, send). For example, communication manager 1720 may receive information from receiver 1710, transmit information to transmitter 1715, or integrate with receiver 1710, transmitter 1715, or both to obtain information, output information, or perform various other operations as described herein.

[0259] According to examples as disclosed herein, the communication manager 1720 may support wireless communications at a network entity. The UE type manager 1725 may be configured as or otherwise support means for receiving an indication of a UE type of the first UE from a first UE. The sidelink communication resource configuration manager 1730 may be configured as or otherwise support means for sending control signaling to the first UE indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0260] Fig.18A block diagram 1800 of a communication manager 1820 supporting low power wake-up radio in side link communications according to one or more aspects of the present disclosure is shown. The communication manager 1820 may be an example of aspects of the communication manager 1620, the communication manager 1720, or both as described herein. The communication manager 1820 or its various components may be examples of components for performing various aspects of low power wake-up radio in side link communications as described herein. For example, the communication manager 1820 may include a UE type manager 1825, a side link communication resource configuration manager 1830, a wake-up manager 1835, a main link communication manager 1840, a wake-up communication resource manager 1845, a resource pool configuration manager 1850, a resource pool capability manager 1855, a signal type manager 1860, a resource pool deactivation manager 1865, a UE configuration manager 1870, a sub-resource pool configuration manager 1875, a multi-configuration manager 1880, a DRX configuration manager 1885, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses), which communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0261] According to examples as disclosed herein, the communication manager 1820 may support wireless communications at a network entity. The UE type manager 1825 may be configured as or otherwise support means for receiving an indication of a UE type of the first UE from a first UE. The sidelink communication resource configuration manager 1830 may be configured as or otherwise support means for sending control signaling to the first UE indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0262] In some examples, the wake-up manager 1835 may be configured to or otherwise support a component for sending a second control signaling to the second UE, the control signaling indicating sending a wake-up signal to the first UE according to the configuration. In some examples, the main link communication manager 1840 may be configured to or otherwise support a component for communicating with the first UE based on sending the second control signaling.

[0263] In some examples, to support sending control signaling, the wake-up communication resource manager 1845 may be configured as or otherwise support components for sending indications of a first subset of a sidelink communication resource set associated with wake-up signals for communication with a network entity and a second subset of a sidelink communication resource set associated with wake-up signals for communication with other UEs.

[0264] In some examples, to support sending control signaling, the DRX configuration manager 1885 may be configured as or otherwise support components for sending indications of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0265] In some examples, to support sending control signaling, resource pool configuration manager 1850 may be configured as or otherwise support components for sending an indication of a configuration by resource pool, where the side link communication resource set includes a resource pool from a set of multiple resource pools associated with a BWP associated with the side link communication of the first UE.

[0266] In some examples, the sidelink communication resource set includes a resource pool. In some examples, the configuration includes a set of reference signal monitoring opportunities for the resource pool, a set of synchronization signal monitoring opportunities for the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0267] In some examples, the resource pool capability manager 1855 may be configured as or otherwise support components for receiving an indication from a first UE of a number of resource pools that the UE can support in sleep mode, where the configuration is based on the indication of the number of resource pools that the UE can support in sleep mode.

[0268] In some examples, to support sending control signaling, signal type manager 1860 may be configured to or otherwise support components for sending an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to a sidelink communication resource set.

[0269] In some examples, to support sending control signaling, the signal type manager 1860 may be configured to or otherwise support components for sending an indication of enabling a synchronization signal for a resource pool corresponding to a side link communication resource set, where the synchronization signal is located outside the resource pool.

[0270] In some examples, to support sending control signaling, resource pool deactivation manager 1865 may be configured as or otherwise support components for sending an indication of a set of multiple resource pools for side link communications, where the side link communications resource set includes a resource pool from the set of multiple resource pools.

[0271] In some examples, to support sending control signaling, UE configuration manager 1870 may be configured or otherwise support components for sending an indication that the configuration is associated with a second UE.

[0272] In some examples, to support sending control signaling, the sub-resource pool configuration manager 1875 may be configured as or otherwise support components for sending an indication that the configuration is associated with a first sub-resource pool of a resource pool for side link communications, wherein the side link communications resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0273] In some examples, to support sending control signaling, multi-configuration manager 1880 may be configured as or otherwise support components for sending an indication of a set of multiple configurations associated with a side link communication resource set, the set of multiple configurations including the configuration.

[0274] Fig.19 A diagram of a system 1900 including a device 1905 supporting a low power wake-up radio in sidelink communications according to one or more aspects of the present disclosure is shown. The device 1905 may be an example of a device 1605, a device 1705, or a network entity 105 as described herein, or include components of these devices. The device 1905 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which may include communication through one or more wired interfaces, through one or more wireless interfaces, or any combination thereof. The device 1905 may include components that support output and acquisition of communications, such as a communication manager 1920, a transceiver 1910, an antenna 1915, a memory 1925, a code 1930, and a processor 1935. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1940).

[0275] The transceiver 1910 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1910 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1910 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1905 may include one or more antennas 1915, which may be capable of (e.g., concurrently) sending or receiving wireless transmissions. The transceiver 1910 may also include a modem for modulating a signal, providing a modulated signal for transmission (e.g., via one or more antennas 1915, via a wired transmitter), receiving a modulated signal (e.g., from one or more antennas 1915, from a wired receiver), and demodulating a signal. In some implementations, the transceiver 1910 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1915 configured to support various receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1915 configured to support various sending or outputting operations, or a combination thereof. In some implementations, the transceiver 1910 may include or be configured to be coupled to one or more processors or memory components, which may be operable to: perform or support operations based on received or obtained information or signals; or generate information or other signals for transmission or other output; or any combination thereof. In some implementations, the transceiver 1910, or the transceiver 1910 and one or more antennas 1915, or the transceiver 1910 and one or more antennas 1915 and one or more processors or memory components (e.g., processor 1935, or memory 1925, or both) may be included in a chip or chip assembly installed in the device 1905. In some examples, the transceiver may be operable to support communications via one or more communication links (eg, communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0276] Memory 1925 may include RAM and ROM. Memory 1925 may store computer-readable, computer-executable code 1930 including instructions that, when executed by processor 1935, cause device 1905 to perform various functions described herein. Code 1930 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1930 may not be directly executable by processor 1935, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1925 may also contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0277] Processor 1935 may include an intelligent hardware device (e.g., a general-purpose processor, DSP, ASIC, CPU, FPGA, microcontroller, programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof). In some cases, processor 1935 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1935. Processor 1935 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1925) to enable device 1905 to perform various functions (e.g., functions or tasks of supporting low-power wake-up radio in sidelink communication). For example, device 1905 or a component of device 1905 may include processor 1935 and memory 1925 coupled to processor 1935, and processor 1935 and memory 1925 are configured to perform various functions described herein. Processor 1935 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, a virtual machine, or a container instance), which may host functions (e.g., by executing code 1930) to perform functions of device 1905. The processor 1935 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1905 (such as in the memory 1925). In some specific implementations, the processor 1935 may be a component of a processing system. A processing system may generally refer to a system or a series of machines or components that receive inputs and process these inputs to produce a set of outputs (which may be passed to, for example, other systems or components of the device 1905). For example, the processing system of the device 1905 may refer to a system including various other components or subcomponents of the device 1905, such as the processor 1935, or the transceiver 1910, or the communication manager 1920, or other components or combinations of components of the device 1905. The processing system of the device 1905 may interface with other components of the device 1905, and may process information (such as input or signals) received from other components, or output information to other components. For example, a chip or modem of the device 1905 may include a processing system and one or more interfaces, which are used to output information or obtain information or both. The one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or the same interface configured to output information and obtain information, etc. In some implementations, the one or more interfaces may refer to an interface between a processing system of a chip or modem and a transmitter, so that the device 1905 can transmit information output from the chip or modem. Additionally or alternatively, in some implementations, the one or more interfaces may refer to an interface between a processing system of a chip or modem and a receiver, so that the device 1905 can obtain information or signal input, and the information can be passed to the processing system.One of ordinary skill in the art will readily recognize that the first interface may also obtain information or signal input, and the second interface may also output information or signal output.

[0278] In some examples, bus 1940 may support communications of a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, bus 1940 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communications performed within a component of device 1905 or between different components of device 1905 that may be co-located or located in different locations (e.g., where device 1905 may refer to a system, where one or more of communication manager 1920, transceiver 1910, memory 1925, code 1930, and processor 1935 may be located in one of the different components or divided between the different components).

[0279] In some examples, communication manager 1920 may manage aspects of communications with core network 130 (e.g., via one or more wired or wireless backhaul links). For example, communication manager 1920 may manage the delivery of data communications for client devices such as one or more UEs 115. In some examples, communication manager 1920 may manage communications with other network entities 105 and may include a controller or scheduler for controlling communications with UE 115 in coordination with other network entities 105. In some examples, communication manager 1920 may support an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between network entities 105.

[0280] According to examples as disclosed herein, the communication manager 1920 may support wireless communications at a network entity. For example, the communication manager 1920 may be configured as or otherwise support a component for receiving an indication of a UE type of the first UE from a first UE. The communication manager 1920 may be configured as or otherwise support a component for sending control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0281] By including or configuring a communication manager 1920 as described herein, the device 1905 can support techniques for improving communication reliability, reducing latency, improving user experience associated with reduced processing, reducing power consumption, more efficiently utilizing communication resources, improving coordination between devices, and extending battery life.

[0282] In some examples, the communication manager 1920 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the transceiver 1910, one or more antennas 1915 (e.g., where applicable), or any combination thereof. Although the communication manager 1920 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1920 may be supported or performed by the transceiver 1910, the processor 1935, the memory 1925, the code 1930, or any combination thereof. For example, the code 1930 may include instructions executable by the processor 1935 to cause the device 1905 to perform various aspects of the low power wake-up radio in the side link communication as described herein, or the processor 1935 and the memory 1925 may be otherwise configured to perform or support such operations.

[0283] Fig. 20 A flowchart illustrating a method 2000 for supporting low power wake-up radio for sidelink communication according to one or more aspects of the present disclosure is shown. The operations of the method 2000 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 2000 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 15 The UE 115 described herein performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0284] At 2005, the method may include receiving control signaling from a network entity via a first radio of a first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The operations of 2005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed as described in reference to Fig.14 The side link communication resource configuration manager 1425 is used to execute.

[0285] At 2010, the method may include receiving a signal from a second UE via a wake-up radio when the first radio is in sleep mode via a sidelink communication resource set according to the configuration. The operations of 2010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed as described in reference to Fig.14 The side link communication manager 1430 is used for execution.

[0286] Fig.21A flowchart illustrating a method 2100 for supporting low power wake-up radio for sidelink communication according to one or more aspects of the present disclosure is shown. The operations of the method 2100 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 2100 may be implemented by a UE or a component thereof as described herein. Figures 1 to 15 The UE 115 described herein performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0287] At 2105, the method may include receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode. The operations of 2105 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2105 may be performed as described in reference Fig.14 The side link communication resource configuration manager 1425 is used to execute.

[0288] At 2110, the method may include receiving a signal from the second UE via a wake-up radio when the first radio is in sleep mode via a sidelink communication resource set according to the configuration. The operations of 2110 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2110 may be performed as described in reference Fig.14 The side link communication manager 1430 is used for execution.

[0289] At 2115, the method may include communicating with one of a network entity or a second UE via the first radio based on receiving a signal via the wake-up radio, wherein the signal includes a wake-up signal. The operations of 2115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2115 may be performed as described in reference to Fig.14 The wake-up manager 1435 is used to execute.

[0290] Fig. 22 A flowchart illustrating a method 2200 for supporting low power wake-up radio for sidelink communication according to one or more aspects of the present disclosure is shown. The operations of the method 2200 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 2200 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 15 The UE 115 described herein performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0291] At 2205, the method may include receiving control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to the first UE when the first radio of the first UE is in a sleep mode. The operations of 2205 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2205 may be performed as described in reference Fig.14 The side link communication resource configuration manager 1425 is used to execute.

[0292] At 2210, the method may include sending a signal to the first UE via a set of sidelink communication resources according to the configuration. The operations of 2210 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2210 may be performed as described in reference to Fig.14 The side link communication manager 1430 is used for execution.

[0293] Fig.23 A flowchart illustrating a method 2300 for supporting low power wake-up radio for sidelink communication according to one or more aspects of the present disclosure is shown. The operations of the method 2300 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 2300 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 15 The UE 115 described herein performs. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0294] At 2305, the method may include receiving control signaling from a network entity indicating a configuration associated with a set of sidelink communication resources for signaling to the first UE when the first radio of the first UE is in a sleep mode. The operations of 2305 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2305 may be performed as described in reference Fig.14 The side link communication resource configuration manager 1425 is used to execute.

[0295] At 2310, the method may include sending a signal to the first UE via a sidelink communication resource set according to the configuration. The operations of 2310 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2310 may be performed as described in reference Fig.14 The side link communication manager 1430 is used for execution.

[0296] At 2315, the method may include communicating with the first UE based on sending the signal, wherein the signal includes a wake-up signal. The operations of 2315 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 2315 may be performed as described in reference Fig.14 The wake-up manager 1435 described above is executed.

[0297] Fig.24 A flowchart illustrating a method 2400 for supporting a low power wake-up radio for sidelink communications according to one or more aspects of the present disclosure is shown. The operations of the method 2400 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 2400 may be implemented by a network entity or a component thereof as described herein. Figures 1 to 11 as well as Figures 16 to 19 The network entity performs. In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0298] At 2405, the method may include receiving an indication of a UE type of the first UE from the first UE. The operations of 2405 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2405 may be performed as described in reference to Fig.18 The UE type manager 1825 is used for execution.

[0299] At 2410, the method may include sending control signaling to the first UE indicating a configuration associated with a set of sidelink communication resources for receiving signaling from the second UE when the first radio of the first UE is in a sleep mode. The operations of 2410 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2410 may be performed as described in reference Fig.18 The side link communication resource configuration manager 1830 is used to execute.

[0300] Fig.25 A flowchart illustrating a method 2500 for supporting a low power wake-up radio for sidelink communications according to one or more aspects of the present disclosure is shown. The operations of the method 2500 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 2500 may be implemented by a network entity or a component thereof as described herein. Figures 1 to 11 as well as Figures 16 to 19 The network entity performs. In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0301] At 2505, the method may include receiving an indication of a UE type of the first UE from the first UE. The operations of 2505 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2505 may be performed as described in reference to Fig.18 The UE type manager 1825 is used for execution.

[0302] At 2510, the method may include sending control signaling to the first UE indicating a configuration associated with a set of sidelink communication resources for receiving signaling from the second UE when the first radio of the first UE is in a sleep mode. The operations of 2510 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2510 may be performed as described in reference to Fig.18 The described side link communication resource configuration manager 1830 is executed.

[0303] At 2515, the method may include sending a second control signaling to the second UE, the second control signaling indicating sending a wake-up signal to the first UE according to the configuration. The operations of 2515 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 2515 may be performed as described in reference to Fig.18 The wake-up manager 1835 is used to execute.

[0304] At 2520, the method may include communicating with the first UE based on sending the second control signaling. The operations of 2520 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2520 may be performed as described in reference Fig.18 The main link communication manager 1840 is used for execution.

[0305] The following provides an overview of various aspects of the disclosure:

[0306] Aspect 1: A method for wireless communication at a first UE, comprising: receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a sidelink communication resource set for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; and receiving a signal from a second UE via the wake-up radio via the sidelink communication resource set according to the configuration when the first radio is in the sleep mode.

[0307] Aspect 2: The method according to aspect 1 also includes: communicating with one of the network entity or the second UE via the first radio based at least in part on receiving the signal via the wake-up radio, wherein the signal includes a wake-up signal.

[0308] Aspect 3: A method according to Aspect 2, wherein receiving the control signaling includes: receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communicating with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communicating with other UEs, and wherein communicating with the network entity or one of the second UEs is at least partially based on the signal being received via the first subset or the second subset.

[0309] Aspect 4: The method according to aspect 3, wherein receiving the control signaling includes: receiving an indication of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0310] Aspect 5: A method according to any one of Aspects 3 to 4, wherein a first DRX configuration associated with the first subset is associated with a first radio resource control state between the first UE and the network entity, a second DRX configuration associated with the first subset is associated with a second radio resource control state between the first UE and the network entity, a third DRX configuration associated with the first subset is associated with a third radio resource control state between the first UE and the network entity, a fourth DRX configuration associated with the second subset is associated with a fourth radio resource control state between the first UE and the second UE, a fifth DRX configuration associated with the second subset is associated with a fifth radio resource control state between the first UE and the second UE, and a sixth DRX configuration associated with the second subset is associated with a sixth radio resource control state between the first UE and the second UE.

[0311] Aspect 6: A method according to any one of Aspects 1 to 5, wherein receiving the control signaling includes: receiving an indication of the configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a plurality of resource pools associated with a BWP associated with the sidelink communication of the first UE.

[0312] Aspect 7: The method according to any one of aspects 1 to 6 further includes: sending an indication of a UE type of the first UE to the network entity, wherein the configuration is based on the UE type.

[0313] Aspect 8: A method according to any one of Aspects 1 to 7, wherein the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities of the resource pool, a set of synchronization signal monitoring opportunities of the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0314] Aspect 9: The method according to any one of aspects 1 to 8 further includes: receiving a second signal from a third UE via the wake-up radio via a default resource pool according to a default configuration when the first radio is in the sleep mode.

[0315] Aspect 10: The method according to any one of Aspects 1 to 9 further includes: sending an indication of the number of resource pools that the UE can support via the wake-up radio, wherein the configuration is at least partially based on the indication of the number of resource pools that the UE can support via the wake-up radio.

[0316] Aspect 11: A method according to any one of Aspects 1 to 10, according to any one of Aspects 1 to 10, wherein receiving the control signaling includes: receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the side link communication resource set.

[0317] Aspect 12: The method according to any one of Aspects 1 to 11, wherein receiving the control signaling comprises: receiving an indication to enable a synchronization signal for a resource pool corresponding to the sidelink communication resource set, wherein the synchronization signal is located outside the resource pool.

[0318] Aspect 13: A method according to any one of Aspects 1 to 12, wherein receiving the control signaling includes: receiving an indication of multiple resource pools for sidelink communication, wherein the sidelink communication resource set includes resource pools in the multiple resource pools, and wherein when the first radio is in the sleep mode, the first UE deactivates monitoring of each resource pool in the multiple resource pools except the resource pool.

[0319] Aspect 14: The method according to any one of aspects 1 to 13, wherein receiving the control signaling includes: receiving an indication that the configuration is associated with the second UE.

[0320] Aspect 15: A method according to any one of Aspects 1 to 14, wherein receiving the control signaling includes: receiving an indication that the configuration is associated with a first sub-resource pool of a resource pool for sidelink communication, wherein the sidelink communication resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0321] Aspect 16: The method according to any one of Aspects 1 to 15 further includes: utilizing the control signaling to receive indications of multiple configurations associated with the sidelink communication resource set, the multiple configurations including the configuration; and receiving a second control signaling from the second UE indicating the configuration from the multiple configurations.

[0322] Aspect 17: A method for wireless communication at a second UE, comprising: receiving control signaling from a network entity, the control signaling indicating a configuration associated with a sidelink communication resource set for sending signaling to the first UE when a first radio of the first UE is in a sleep mode; and sending a signal to the first UE via the sidelink communication resource set according to the configuration.

[0323] Aspect 18: The method according to aspect 17 also includes: communicating with the first UE based at least in part on sending the signal, wherein the signal includes a wake-up signal.

[0324] Aspect 19: A method according to Aspect 18, wherein receiving the control signaling includes: receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communicating with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communicating with other UEs, and wherein communicating with the first UE is at least partially based on the signal being sent via the second subset.

[0325] Aspect 20: The method according to aspect 19, wherein receiving the control signaling includes: receiving an indication of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0326] Aspect 21: A method according to any one of Aspects 17 to 20, wherein receiving the control signaling includes: receiving an indication of the configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a plurality of resource pools associated with a BWP associated with the sidelink communication of the first UE.

[0327] Aspect 22: A method according to any one of Aspects 17 to 21, wherein the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities of the resource pool, a set of synchronization signal monitoring opportunities of the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0328] Aspect 23: A method according to any one of Aspects 17 to 22, wherein receiving the control signaling includes: receiving an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the sidelink communication resource set.

[0329] Aspect 24: A method according to any one of Aspects 17 to 23, wherein receiving the control signaling includes: receiving an indication to enable a synchronization signal for a resource pool corresponding to the sidelink communication resource set, wherein the synchronization signal is located outside the resource pool.

[0330] Aspect 25: A method according to any one of Aspects 17 to 24, wherein receiving the control signaling includes: receiving an indication of multiple resource pools for sidelink communication, wherein the sidelink communication resource set includes a resource pool in the multiple resource pools.

[0331] Aspect 26: The method according to any one of aspects 17 to 25, wherein receiving the control signaling includes: receiving an indication that the configuration is associated with the first UE.

[0332] Aspect 27: A method according to any one of Aspects 17 to 26, wherein receiving the control signaling includes: receiving an indication that the configuration is associated with a first sub-resource pool of a resource pool for sidelink communication, wherein the sidelink communication resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0333] Aspect 28: The method according to any one of Aspects 17 to 27 further includes: utilizing the control signaling to receive indications of multiple configurations associated with the sidelink communication resource set, the multiple configurations including the configuration; and sending a second control signaling indicating the configuration from the multiple configurations to the first UE.

[0334] Aspect 29: A method for wireless communication at a network entity, comprising: receiving an indication of a UE type of a first UE from a first UE; and sending control signaling to the first UE, the control signaling indicating a configuration associated with a set of sidelink communication resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

[0335] Aspect 30: The method according to Aspect 29 further includes: sending a second control signaling to the second UE, the second control signaling indicating sending a wake-up signal to the first UE according to the configuration; and communicating with the first UE at least partially based on sending the second control signaling.

[0336] Aspect 31: A method according to any one of Aspects 29 to 30, wherein sending the control signaling includes: sending an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs.

[0337] Aspect 32: The method according to aspect 31, wherein sending the control signaling includes: sending an indication of one or more of a first DRX configuration associated with the first subset and a second DRX configuration associated with the second subset.

[0338] Aspect 33: A method according to any one of Aspects 29 to 32, wherein sending the control signaling includes: sending an indication of the configuration by resource pool, wherein the sidelink communication resource set includes a resource pool from a plurality of resource pools associated with the BWP associated with the sidelink communication of the first UE.

[0339] Aspect 34: A method according to any one of Aspects 29 to 33, wherein the side link communication resource set includes a resource pool, and the configuration includes a set of reference signal monitoring opportunities of the resource pool, a set of synchronization signal monitoring opportunities of the resource pool, a set of wake-up signal monitoring opportunities, or a combination thereof.

[0340] Aspect 35: The method according to any one of Aspects 29 to 34 further includes: receiving from the first UE an indication of the number of resource pools that the UE can support in the sleep mode, wherein the configuration is at least partially based on the indication of the number of resource pools that the UE can support in the sleep mode.

[0341] Aspect 36: A method according to any one of Aspects 29 to 35, wherein sending the control signaling includes: sending an indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the sidelink communication resource set.

[0342] Aspect 37: A method according to any one of Aspects 29 to 36, wherein sending the control signaling includes: sending an indication of enabling a synchronization signal for a resource pool corresponding to the sidelink communication resource set, wherein the synchronization signal is located outside the resource pool.

[0343] Aspect 38: A method according to any one of Aspects 29 to 37, wherein sending the control signaling includes: sending an indication of multiple resource pools for sidelink communication, wherein the sidelink communication resource set includes a resource pool in the multiple resource pools.

[0344] Aspect 39: A method according to any one of aspects 29 to 38, wherein sending the control signaling includes: sending an indication that the configuration is associated with the second UE.

[0345] Aspect 40: A method according to any one of Aspects 29 to 39, wherein sending the control signaling includes: sending an indication that the configuration is associated with a first sub-resource pool of a resource pool for sidelink communication, wherein the sidelink communication resource set includes the first sub-resource pool, and wherein a guard band separates the first sub-resource pool from a second sub-resource pool of the resource pool.

[0346] Aspect 41: A method according to any one of Aspects 29 to 40, wherein sending the control signaling includes: sending an indication of multiple configurations associated with the sidelink communication resource set, the multiple configurations including the configuration.

[0347] Aspect 42: An apparatus for performing wireless communications at a first UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 1 to 16.

[0348] Aspect 43: An apparatus for wireless communication at a first UE, comprising: at least one component for performing a method according to any one of aspects 1 to 16.

[0349] Aspect 44: A non-transitory computer-readable medium storing code for wireless communication at a first UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 16.

[0350] Aspect 45: An apparatus for wireless communication at a second UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 17 to 28.

[0351] Aspect 46: An apparatus for wireless communication at a second UE, comprising: at least one component for performing a method according to any one of aspects 17 to 28.

[0352] Aspect 47: A non-transitory computer-readable medium storing code for wireless communication at a second UE, the code comprising instructions executable by a processor to perform a method according to any one of aspects 17 to 28.

[0353] Aspect 48: An apparatus for wireless communication at a network entity, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 29 to 41.

[0354] Aspect 49: An apparatus for wireless communication at a network entity, comprising: at least one component for performing a method according to any one of aspects 29 to 41.

[0355] Aspect 50: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to perform the method according to any one of aspects 29 to 41.

[0356] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0357] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0358] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0359] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0360] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0361] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as one or more instructions or codes of a computer-readable medium, or sent using the one or more instructions or codes. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or any combination of these items. Features that implement the functions may also be physically located at different locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0362] Computer-readable medium includes both non-transient computer storage medium and communication medium, including any medium that facilitates computer program to be transmitted from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.By way of example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing desired program code parts and can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure Any other non-transient medium.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. Disks and optical disks as used herein include CDs, laser optical disks, optical optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, and optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0363] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0364] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, etc. Additionally, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, retrieving, selecting, choosing, establishing, and other such similar actions.

[0365] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label regardless of the second reference label, or other subsequent reference labels.

[0366] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "having advantages over other examples." The specific embodiments include specific details to provide an understanding of the described technology. However, these technologies may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0367] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first user equipment (UE), comprising: receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a set of sidelink communications resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; as well as A signal is received from a second UE via the wake-up radio via the set of sidelink communications resources according to the configuration while the first radio is in the sleep mode.

2. The method according to claim 1, further comprising: Communicate with one of the network entity or the second UE via the first radio based at least in part on receiving the signal via the wake-up radio, wherein the signal comprises a wake-up signal.

3. The method according to claim 2, wherein receiving the control signaling comprises: Receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs, and wherein communicating with the one of the network entity or the second UE is at least partially based on the signal being received via the first subset or the second subset.

4. The method according to claim 3, wherein receiving the control signaling comprises: An indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset is received.

5. The method of claim 3 , wherein a first discontinuous reception configuration associated with the first subset is associated with a first radio resource control state between the first UE and the network entity, a second discontinuous reception configuration associated with the first subset is associated with a second radio resource control state between the first UE and the network entity, a third discontinuous reception configuration associated with the first subset is associated with a third radio resource control state between the first UE and the network entity, a fourth discontinuous reception configuration associated with the second subset is associated with a fourth radio resource control state between the first UE and the second UE, a fifth discontinuous reception configuration associated with the second subset is associated with a fifth radio resource control state between the first UE and the second UE, and a sixth discontinuous reception configuration associated with the second subset is associated with a sixth radio resource control state between the first UE and the second UE.

6. The method of claim 1 , wherein receiving the control signaling comprises: An indication of the configuration by resource pool is received, wherein the set of sidelink communications resources comprises a resource pool of a plurality of resource pools associated with a bandwidth portion associated with sidelink communications of the first UE.

7. The method according to claim 1, further comprising: An indication of a UE type of the first UE is sent to the network entity, wherein the configuration is based on the UE type.

8. The method according to claim 1, further comprising: A second signal is received from a third UE via the wake-up radio via a default resource pool according to a default configuration while the first radio is in the sleep mode.

9. The method according to claim 1, further comprising: An indication of a number of resource pools that the UE is capable of supporting via the wake-up radio is sent, wherein the configuring is based at least in part on the indication of the number of resource pools that the UE is capable of supporting via the wake-up radio.

10. The method according to claim 1, wherein receiving the control signaling comprises: An indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the sidelink communications resource set is received.

11. The method of claim 1 , wherein receiving the control signaling comprises: Receiving an indication of a plurality of resource pools for sidelink communication, wherein the set of sidelink communication resources comprises a resource pool in the plurality of resource pools, wherein when the first radio is in the sleep mode, the first UE deactivates monitoring of each resource pool in the plurality of resource pools except the resource pool.

12. The method of claim 1, wherein receiving the control signaling comprises: An indication is received that the configuration is associated with the second UE.

13. The method of claim 1 , wherein receiving the control signaling comprises: An indication is received that the configuration is associated with a first sub-pool of a resource pool for sidelink communications, wherein the set of sidelink communications resources includes the first sub-pool of resources, and wherein a guard band separates the first sub-pool of resources from a second sub-pool of the resource pool.

14. The method according to claim 1, further comprising: receiving, using the control signaling, an indication of a plurality of configurations associated with the set of sidelink communications resources, the plurality of configurations including the configuration; as well as Second control signaling is received from the second UE indicating the configuration from the plurality of configurations.

15. A method for wireless communication at a second user equipment (UE), comprising: receiving control signaling from a network entity indicating a configuration associated with a set of sidelink communications resources for signaling to a first UE when a first radio of the first UE is in a sleep mode; as well as Sending a signal to the first UE via the set of sidelink communications resources according to the configuration.

16. The method according to claim 15, further comprising: Communicating with the first UE is based at least in part on sending the signal, wherein the signal comprises a wake-up signal.

17. The method of claim 16, wherein receiving the control signaling comprises: Receiving an indication of a first subset of the sidelink communication resource set associated with a wake-up signal for communication with the network entity and a second subset of the sidelink communication resource set associated with a wake-up signal for communication with other UEs, and wherein communicating with the first UE is at least partially based on the signal being sent via the second subset.

18. The method of claim 17, wherein receiving the control signaling comprises: An indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset is received.

19. The method of claim 15, wherein receiving the control signaling comprises: An indication of the configuration by resource pool is received, wherein the set of sidelink communications resources comprises a resource pool of a plurality of resource pools associated with a bandwidth portion associated with sidelink communications of the first UE.

20. The method of claim 15, wherein receiving the control signaling comprises: An indication of a plurality of resource pools for sidelink communications is received, wherein the set of sidelink communications resources comprises a resource pool of the plurality of resource pools.

21. The method of claim 15, wherein receiving the control signaling comprises: An indication is received that the configuration is associated with a first sub-pool of a resource pool for sidelink communications, wherein the set of sidelink communications resources includes the first sub-pool of resources, and wherein a guard band separates the first sub-pool of resources from a second sub-pool of the resource pool.

22. The method of claim 15, further comprising: receiving, using the control signaling, an indication of a plurality of configurations associated with the set of sidelink communications resources, the plurality of configurations including the configuration; as well as Second control signaling indicating the configuration from the plurality of configurations is sent to the first UE.

23. A method for wireless communication at a network entity, comprising: receiving, from a first user equipment (UE), an indication of a UE type of the first UE; as well as Control signaling is sent to the first UE, the control signaling indicating a configuration associated with a set of sidelink communications resources for receiving signaling from a second UE when a first radio of the first UE is in a sleep mode.

24. The method according to claim 23, further comprising: Sending a second control signaling to the second UE, where the second control signaling indicates sending a wake-up signal to the first UE according to the configuration; as well as Communicating with the first UE is based at least in part on sending the second control signaling.

25. The method of claim 23, wherein sending the control signaling comprises: An indication of a first subset of the set of sidelink communications resources associated with wake-up signals for communications with the network entity and a second subset of the set of sidelink communications resources associated with wake-up signals for communications with other UEs is sent.

26. The method of claim 25, wherein sending the control signaling comprises: An indication of one or more of a first discontinuous reception configuration associated with the first subset and a second discontinuous reception configuration associated with the second subset is sent.

27. The method of claim 23, wherein sending the control signaling comprises: An indication of the configuration by resource pool is sent, wherein the set of sidelink communications resources comprises a resource pool of a plurality of resource pools associated with a bandwidth portion associated with sidelink communications of the first UE.

28. The method of claim 23, further comprising: An indication of a number of resource pools that the UE can support in the sleep mode is received from the first UE, wherein the configuring is based at least in part on the indication of the number of resource pools that the UE can support in the sleep mode.

29. The method of claim 23, wherein sending the control signaling comprises: An indication of whether a reference signal, a synchronization signal, or a combination thereof is enabled for a resource pool corresponding to the sidelink communications resource set is sent.

30. An apparatus for wireless communication at a first user equipment (UE), comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receiving control signaling from a network entity via a first radio of the first UE, the control signaling indicating a configuration associated with a set of sidelink communications resources for receiving signaling via a wake-up radio of the first UE when the first radio is in a sleep mode; as well as A signal is received from a second UE via the wake-up radio via the set of sidelink communications resources according to the configuration while the first radio is in the sleep mode.

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