WO2024124936A1

WO2024124936A1 - Sidelink wake up signal resource (pre) configuration

Info

Publication number: WO2024124936A1
Application number: PCT/CN2023/113465
Authority: WO
Inventors: Xiaodong Yu; Zhi YAN; Zhennian SUN; Haipeng Lei; Xin Guo
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-06-20
Anticipated expiration: 2026-02-17
Also published as: WO2024124936A9

Abstract

Various aspects of the present disclosure relate to sidelink (SL) wake up signal (WUS) resource (pre) configuration. In an aspect, a user equipment receives, from a base station, first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource. Here, the first time domain resource is separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a guard period (GP) symbol. Then, based on the first configuration information, the user equipment performs SL WUS transmission or reception on the one of the first time domain resource, the second time domain resource, or the third time domain resource. In this way, potential SL WUS resource collision can be eliminated and communication efficiency and quality can be improved.

Description

SIDELINK WAKE UP SIGNAL RESOURCE (PRE) CONFIGURATION

TECHNICAL FIELD

The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a base station, processors for wireless communication, methods, and non-transitory computer readable media for sidelink (SL) wake up signal (WUS) resource (pre) configuration.

BACKGROUND

A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .

In legacy downlink (DL) WUS transmission, a discontinuous reception (DRX) on duration and its associated WUS reception duration are (pre) configured. If a UE receive a WUS within wake up signal reception duration and the wakeup indication has a value of ‘1’ , the UE will perform downlink control information (DCI) monitoring in subsequent DRX on duration, else UE will not monitor DCI transmission in DRX on duration. For DL, network (for example, a base station) transmits WUS on the resource (s) within WUS duration, therefore there is no collision among multiple UEs by network scheduling. But for SL, more than one UEs may transmit SL WUS within WUS duration, which causes potential transmission collision when different UEs select the same resource or non-orthogonal resource. However, there are still some open problems related to SL WUS resource (pre) configuration that will be studied.

SUMMARY

Accordingly, it may be desirable to define new time/frequency resource or new timeslot for SL WUS transmission or reception. The present disclosure relates to a UE, a base station, processors for wireless communication, methods, and non-transitory computer readable media for SL WUS resource (pre) configuration. Embodiments of the disclosure can eliminate potential transmission collision and improve communication efficiency and quality.

In a first aspect of the solution, a user equipment (UE) is provided. The UE comprises a processor and a transceiver coupled to the processor, wherein the processor is configured to: receive, via the transceiver and from a base station, first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a guard period (GP) symbol; and perform, via the transceiver and based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some implementations of the UE, the processor is further configured to: receive, via the transceiver and from the base station, second configuration information indicative of a fourth time domain resource, wherein the fourth time domain resource comprises one of a frame, a subframe, or a timeslot; and perform, via the transceiver and based on the second configuration information, SL WUS transmission or reception on full or partial of the fourth time domain resource.

In some implementations of the UE, the second configuration information is a bit sequence, a first bit value in the bit sequence indicates that a frame, a subframe or a timeslot has a SL WUS resource, and a second bit value in the bit sequence indicates that a frame, a subframe or a timeslot does not have a SL WUS resource.

In some implementations of the UE, a length of the bit sequence corresponds to a first number of frames in the case that the second configuration information is per frame, and the length of the bit sequence corresponds to a second number of subframes or timeslots in the case that the second configuration information is per subframe or timeslot.

In some implementations of the UE, the second configuration information comprises a period and a time offset, the period represents a time interval between two adjacent fourth time domain resources, and the time offset represents a time offset between the first frame/subframe/timeslot in the period and the frame/subframe/timeslot with the fourth time domain resource in the same period.

In some implementations of the UE, the full or partial of the fourth time domain resource is configured by the base station per bandwidth part (BWP) .

In some implementations of the UE, the first configuration information comprises a symbol index of one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some implementations of the UE, the first configuration information comprises a starting symbol of the one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some implementations of the UE, the first configuration information further comprises a symbol length of the one of the first time domain resource, second time domain resource, or the third time domain resource.

In some implementations of the UE, the processor is further configured to: determine the SL WUS symbol based on the starting symbol, a configuration parameter, and whether the GP symbol exists.

In some implementations of the UE, the configuration parameter indicates a starting symbol in a predefined time slot.

In some implementations of the UE, the processor is further configured to: determine the SL WUS symbol based on the starting symbol and the symbol length.

In some implementations of the UE, the first configuration information indicates the third time domain resource, in the case that the timeslot comprise the third time domain resource the processor is further configured to: prevent from performing PSCCH/PSSCH transmission in the timeslot; and perform, via the transceiver, SL WUS reception on the third time domain resource.

In some implementations of the UE, the first configuration information indicates the third time domain resource, in the case that the timeslot comprise the third time domain resource, and the processor is further configured to: prevent from performing PSCCH/PSSCH reception in the timeslot; and perform, via the transceiver, SL WUS transmission on the third time domain resource.

In some implementations of the UE, the first configuration information indicates the third time domain resource, in the case that the timeslot comprising the third time domain resource is a timeslot with a PSFCH region, and the processor is further configured to: prevent from performing PSFCH transmission in the timeslot; and perform, via the transceiver, SL WUS reception on the third time domain resource.

In some implementations of the UE, the first configuration information indicates the third time domain resource, in the case that the timeslot comprising the third time domain resource is a timeslot with a PSFCH region, and the processor is further configured to: prevent from performing PSFCH reception in the timeslot; and perform, via the transceiver, SL WUS transmission on the third time domain resource.

In a second aspect of the solution, a processor for wireless communication is provided. The processor comprises at least one memory and a controller coupled with the at least one memory and configured to cause the controller to: receive, from a base station, a first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel /physical sidelink shared channel (PSCCH/PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a GP symbol; and perform, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.

In a third aspect of the solution, a method performed by a user equipment (UE) is provided. The method comprises: receiving, from a base station, a first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel/physical sidelink shared channel (PSCCH/PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a GP symbol; and performing, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.

In a fourth aspect of the solution, a base station (BS) is provided. The base station comprises a processor and a transceiver coupled to the processor, wherein the processor is configured to: determine one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol; and transmit, via the transceiver and to a user equipment (UE) , first configuration information indicative of the one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some implementations of the base station, the processor is further configured to: determine, a fourth time domain resource comprising one of a frame, a subframe or a timeslot; and transmit, via the transceiver and to the user equipment, second configuration information indicative of the fourth time domain resource.

In some implementations of the base station, the second configuration information is a bit sequence, a first bit value in the bit sequence indicates that a frame, a subframe or a timeslot has a SL WUS resource, and a second bit value in the bit sequence indicates that a frame, a subframe or a timeslot does not have a SL WUS resource.

In some implementations of the base station, a length of the bit sequence corresponds to a first number of frames in the case that the second configuration information is per frame, and the length of the bit sequence corresponds to a second number of subframes or timeslots in the case that the second configuration information is per subframe or timeslot.

In some implementations of the base station, the second configuration information comprises a period and a time offset, the period represents a time interval between two adjacent fourth time domain resource, and the time offset represents a time offset between the first frame/subframe/timeslot in the period and the frame/subframe/timeslot with the fourth time domain resources in the same period.

In some implementations of the base station, the processor is further configured to: configure the full or partial of the fourth time domain resource per bandwidth part (BWP) .

In some implementations of the base station, the first configuration information comprises a symbol index of one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some implementations of the base station, the first configuration information comprises a starting symbol of the one of the first time domain resource, the second time domain resource or the third time domain resource.

In some implementations of the base station, the first configuration information further comprises a symbol length of the one of the first time domain resource, second time domain resource or the third time domain resource.

In a fifth aspect of the solution, a processor for wireless communication is provided. The processor comprises at least one memory and a controller coupled with the at least one memory and configured to cause the controller to: determine one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol; and output, to a user equipment (UE) , a first configuration information indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.

In a sixth aspect of the solution, a method performed by a base station (BS) is provided. The method comprises: determining one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol; and transmitting, to a user equipment (UE) , a first configuration information indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A illustrates an example of a wireless communications system that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure.

FIG. 1B illustrates a schematic diagram of an example DL WUS and related DRX configuration associated with aspects of the present disclosure.

FIG. 1C illustrates a schematic diagram of a structure of a resource pool associated with aspects of the present disclosure.

FIG. 1D illustrates a schematic diagram of a structure of a timeslot associated with aspects of the present disclosure.

FIG. 1E illustrates a schematic diagram of a structure of another timeslot associated with aspects of the present disclosure.

FIG. 2 illustrates a signaling chart illustrating an example communication process in accordance with aspects of the present disclosure.

FIG. 3A illustrates a schematic diagram of an example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 3B illustrates a schematic diagram of another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 3C illustrates a schematic diagram of further another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 4A illustrates a schematic diagram of an example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 4B illustrates a schematic diagram of another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 5A illustrates a schematic diagram of an example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 5B illustrates a schematic diagram of another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 6A illustrates a schematic diagram of an example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 6B illustrates a schematic diagram of another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 6C illustrates a schematic diagram of further another example SL WUS resource in accordance with aspects of the present disclosure.

FIG. 7 illustrates a schematic diagram of another example SL WUS resource in accordance with aspects of the present disclosure.

FIGS. 8 and 9 illustrate examples of devices that support SL WUS resource (pre) configuration in accordance with aspects of the present disclosure.

FIGS. 10 and 11 illustrate examples of processors that support SL WUS resource (pre) configuration in accordance with aspects of the present disclosure.

FIGS. 12 and 13 illustrate flowcharts of methods that support SL WUS resource (pre) configuration in accordance with aspects of the present disclosure.

Throughout the drawings, the same or similar reference numerals represent the same or similar elements.

DETAILED DESCRIPTION

Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below. In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.

References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the listed terms. In some examples, values, procedures, or apparatuses are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments. As used herein, the singular forms “a, ” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises, ” “comprising, ” “has, ” “having, ” “includes” and/or “including, ” when used herein, specify the presence of stated features, elements, components and/or the like, but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and/or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.

As mentioned above, for SL, it is different from DL in that more than one UEs may transmit SL WUS within WUS duration, which causes potential transmission collision when more than one UE selects the same resource or non-orthogonal resource. So how to select, reserve or indicate a proper SL WUS resource within WUS duration needs to be considered.

Sidelink (SL) wake up signal (WUS) is considered to be introduced for the third generation partnership project (3GPP) Release-19 (Rel-19) SL communication. For either sidelink control information (SCI) based WUS or sequence based WUS, related resource allocation of SL WUS is not considered. In addition, the compatibility of SL WUS transmission with physical sidelink control channel /physical sidelink shared channel /physical sidelink feedback channel (PSCCH/PSSCH/PSFCH) should be considered as well. If an SL WUS is transmitted on PSFCH region, SL WUS may occupy more resource, e.g., 10 times resource, comparing with hybrid automatic repeat request (HARQ) feedback and inter-UE coordination (IUC) transmission on legacy PSFCH. So the potential resource collision or limitation on legacy PSFCH region should be considered.

In view of the above, embodiments of the present disclosure provide a solution for SL WUS resource (pre) configuration. In an aspect of the solution, a base station determines one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol. The base station transmits, to a user equipment (UE) , first configuration information indicative of the one of the first time domain resource, the second time domain resource, or the third time domain resource. On the other side of communication, the user equipment receives, from the base station, the first configuration information indicative of one of the first time domain resource, the second time domain resource or a third time domain resource. The first time domain resource is separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a guard period (GP) symbol. The user equipment performs, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource, or the third time domain resource. In this way, potential SL WUS resource collision as described above can be eliminated and communication efficiency and quality can thus be improved.

FIG. 1A illustrates an example of a wireless communications system 100 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) or network device) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.

The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.

A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.

The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1A. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1A. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.

A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.

A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .

In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, 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, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.

An RU 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 transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .

Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an 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 a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .

A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.

The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.

The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application third 118. In some implementations, one or more UEs 104 may communicate with the application third 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application third 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .

In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.

One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., =0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., =4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.

A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.

Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, =1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.

In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.

FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.

FIG. 1B illustrates a schematic diagram of an example DL WUS and related DRX configuration 100B associated with aspects of the present disclosure. In the example illustrated in FIG. 1B, during the first DL WUS duration of a DRX cycle, a UE (for example UE 104 as illustrated in FIG. 1A) receives a wakeup indication from a base station (for example, a network entity 102 as illustrated in FIG. 1A) , whose value is “1” , which means that the UE should wake up for DL reception in the next wakeup duration (i.e., DRX on duration in this DRX scenario) . In this case, the UE wakes up during the next wakeup duration of the DRX cycle to perform DL reception from the base station. During the second SL WUS duration of a DRX cycle, the UE receives a wakeup indication from the base station, whose value is “0” , which means that the UE should sleep away (do not wake up) in the next wakeup duration. In this case, the UE sleeps away during the next wakeup duration of the DRX cycle, as indicated by “No Wakeup” shown in FIG. 1B. It is to be noted that the indication of “wakeup indication = 0” may be performed in an implicit manner, for example, by simply ignoring transmission of the wakeup indication in the SL WUS indication /detection duration.

As described above with reference to FIG. 1B, for DL, the base station transmits WUS on the resource (s) within WUS duration, and there is no collision among multiple UEs by network scheduling. But for SL, for a specific UE, more than one UEs may transmit SL WUS to the specific UE within a WUS duration of the specific UE, which causes potential SL WUS resource collision when more than one UE select the same resource or non-orthogonal resource to transmit or receive SL WUS to or receive SL WUS from the specific UE within a WUS duration of the specific UE. So how to select, reserve or indicate a proper SL WUS resource within WUS duration needs to be considered.

FIG. 1C illustrates a schematic diagram of a structure of a resource pool 100C associated with aspects of the present disclosure. There are 4 subchannels shown in FIG. 1C. For example, there frequency domain size of the resource pool 100C is 100 RB, which are allocated to 4 subchannels as shown in FIG. 1C. For example, each subchannel may have a size of 25 RBs in frequency domain. Hereafter, it is assumed that a time slot includes 14 symbols. As shown in FIG. 1C, there are normal timeslot without PSFCH region, and timeslot with PSFCH region.

FIG. 1D illustrates a schematic diagram of a structure of a timeslot 100D associated with aspects of the present disclosure. As shown in FIG. 1D, the timeslot 100D has a PSFCH region. In the timeslot 100D illustrated in FIG. 1D, the timeslot 100D includes 14 symbols, and the subchannel has a size of 25 RBs in frequency domain. In the time-frequency grid of 14 symbols *25 RBs, there is a PSCCH region which is in the time-domain ranging from symbol #0 to #2 and in the frequency-domain ranging from RB #0 to #19, a GP region (GP symbol is guard period for Rx (reception) to Tx (transmission) switching and Tx to Rx switching) which is in the time-domain at symbol #13 and in the frequency-domain ranging from RB #0 to #24, and the rest is allocated as a PSSCH region.

FIG. 1E illustrates a schematic diagram of a structure of another timeslot 100E associated with aspects of the present disclosure. As shown in FIG. 1E, the timeslot 100E has a PSFCH region. In the timeslot 100E illustrated in FIG. 1E, the timeslot 100E includes 14 symbols, and the subchannel has a size of 25 RBs in frequency domain. In the time-frequency grid of 14 symbols *25 RBs, there is a PSCCH region which is in the time-domain ranging from symbol #0 to #2 and in the frequency-domain ranging from RB #0 to #19, a PSFCH region which is in the time-domain ranging from symbol #11 to #12 and in the frequency domain ranging from RB #0 to #24, two GP regions which are in the time-domain at symbol #13 or #10 and in the frequency-domain ranging from RB #0 to #24, respectively, and the rest is allocated as a PSSCH region.

FIG. 2 illustrates a signaling chart illustrating an example communication process 200 in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the communication process 200 will be described with reference to FIG. 1A. The communication process 200 may involve a user equipment (UE) 220 and a base station (BS) 210. UE 220 may be an example of the UE 104 as illustrated in FIG. 1A, and BS 210 may be an example of the network entity 102 as illustrated in FIG. 1A.

As illustrated in FIG. 2, at block 230, the base station (BS) 210 determine one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol. Then, the base station 210 transmits (240) , to the user equipment (UE) 220, first configuration information 201 indicative of the one of the first time domain resource, the second time domain resource, or the third time domain resource. On the other side of communication, the user equipment 220 receives (242) , from the base station 210, the first configuration information 201 indicative of one of the first time domain resource, the second time domain resource or the third time domain resource. Thereafter, the user equipment 220 performs, based on the first configuration information 201, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource, or the third time domain resource.

In addition, the base station 210 may further determine a fourth time domain resource comprising one of a frame, a subframe or a timeslot, and transmit, to the user equipment 220, second configuration information indicative of the fourth time domain resource. On the other side of communication, the user equipment 220 may receive, from the base station 210, second configuration information indicative of the fourth time domain resource, and thereafter, perform, based on the second configuration information, SL WUS transmission or reception on full or partial of the fourth time domain resource. For example, the base station 210 may configure the full or partial of the fourth time domain resource per bandwidth part (BWP) .

Specifically, the second configuration information may be a bit sequence, a first bit value in the bit sequence may indicate that a frame, a subframe or a timeslot has a SL WUS resource, and a second bit value in the bit sequence may indicate that a frame, a subframe or a timeslot does not have a SL WUS resource. For example, a length of the bit sequence may correspond to a first number of frames in the case that the second configuration information is per frame, and the length of the bit sequence may correspond to a second number of subframes or timeslots in the case that the second configuration information is per subframe or timeslot.

In addition or as an alternative, the second configuration information may comprise a period and a time offset, the period may represent a time interval between two adjacent fourth time domain resource, and the time offset may represent a time offset between the first frame/subframe/timeslot in the period and the frame/subframe/timeslot with the fourth time domain resources in the same period.

In some circumstances, the first configuration information 201 may comprise a symbol index of one of the first time domain resource, the second time domain resource, or the third time domain resource.

In some other circumstances, the first configuration information 201 may comprise a starting symbol of the one of the first time domain resource, the second time domain resource or the third time domain resource. In such a case, the user equipment 220 may determine the SL WUS symbol based on the starting symbol, a configuration parameter, and whether a GP symbol exists. For example, the configuration parameter may indicate a starting symbol in a predefined time slot.

In some example embodiments, the first configuration information 201 may further comprise a symbol length of the one of the first time domain resource, second time domain resource, or the third time domain resource. In such a case, the user equipment 220 may determine the SL WUS symbol based on the starting symbol and the symbol length.

Alternatively, the first configuration information 201 may indicate the third time domain resource, in the case that the timeslot comprise the third time domain resource, the user equipment 220 may prevent from performing PSCCH/PSSCH transmission in the timeslot, and perform SL WUS reception on the third time domain resource. In addition or as an alternative, the user equipment 220 may prevent from performing PSCCH/PSSCH reception in the timeslot, and perform SL WUS transmission on the third time domain resource. In addition or as an alternative, the user equipment 220 may prevent from performing PSFCH transmission in the timeslot, and perform SL WUS reception on the third time domain resource. In addition or as an alternative, the user equipment 220 may prevent from performing PSFCH reception in the timeslot, and perform SL WUS transmission on the third time domain resource.

In this way, potential SL WUS resource collision as described above can be eliminated and communication efficiency and quality can thus be improved.

FIG. 3A illustrates a schematic diagram of an example SL WUS resource 300A in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 300A will be described with reference to FIG. 1C. The (pre) configuration of SL WUS resource 300A may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

For example, the base station 210, at the network side, (pre) configures a set of frame/subframe/timeslot on sidelink for SL WUS transmission. For example, 1024 bits represent whether 1024 frames have SL WUS resource or not respectively, and 10240 bits represent whether 10240 subframes/timeslots have SL WUS resource or not respectively. Each “1” in the bit sequence represents that the corresponding frame/subframe/timeslot has SL WUS resource and “0” in the bit sequence represents that the corresponding frame/subframe/timeslot has no SL WUS resource.

Specifically, in the example illustrated in FIG. 3A, the time domain resource is represented in timeslot. In this case, the base station 210 may (pre) configure the set of subframe/timeslot by a set of 10240 bits in bit sequence manner. More specifically, for the 6 timeslots shown in FIG. 3A, since the first, third, fourth and sixth timeslots has SL WUS resource while the second and fifth timeslots do not have SL WUS resource, the corresponding bit sequence excerpt is {1, 0, 1, 1, 0, 1} .

FIG. 3B illustrates a schematic diagram of another example SL WUS resource 300B in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 300B will be described with reference to FIG. 3A. The (pre) configuration of SL WUS resource 300B may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

For example, the base station 210, at the network side, (pre) configures a period N (N is an integer no less than 1) of SL WUS resources and an offset k of SL WUS resource. In other words, the SL WUS timeslot is allocated per N slot. The offset k is relative to the period or starting timeslot (index {0} from {0, ..., 10240} ) .

Specifically, in the example illustrated in FIG. 3B, the first, third and fifth timeslots have SL WUS resources, and the second, fourth and sixth timeslots do not have SL WUS resources. Therefore, the period N is considered to be 2, and the offset is 0, and {ms2, 0} represents the period = 2 and the offset to the period is 0.

FIG. 3C illustrates a schematic diagram of further another example SL WUS resource 300C in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 300C will be described with reference to FIG. 3A. The (pre) configuration of SL WUS resource 300C may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

In the example illustrated in FIG. 3C, the second and sixth timeslots have SL WUS resources, and the first, third, fourth and fifth timeslots do not have SL WUS resources. Therefore, the period N is considered to be 5, and the offset is considered to be 1, and {ms5, 1} represents the period = 5 and the offset to the period is 1.

In addition to or as an alternative of (pre) configuring frame/subframe/timeslot for SL WUS, the base station may (pre) configure time domain resource (symbol) , either resource separated from PSCCH/PSSCH resource (in which case will be described in more detail below with reference to FIGS. 4A and 4B) or resource within PSCCH/PSSCH resource, for SL WUS (in which case will be described in more detail below with reference to FIGS. 5A and 5B) .

FIG. 4A illustrates a schematic diagram of an example SL WUS resource 400A in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 400A will be described with reference to FIG. 1C. The (pre) configuration of SL WUS resource 400A may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2) .

The base station may (pre) configure a time domain resource for SL WUS transmission within a timeslot.

With the legacy definition on sidelink resource in 3GPP Rel-16, the base station 210 can configure SL WUS resource separated from legacy PSCCH/PSSCH. In this way, impact on legacy operations is small.

Specifically, the base station 210 (pre) configures a symbol length and a starting symbol for SL WUS transmission or reception. The user equipment 220 determines the SL WUS symbol based on the starting symbol and symbol length. For example, the base station 210 may transmit the following (pre) configuration to the user equipment 220. For example, the (pre) configuration may be as below:

The user equipment 220, on receipt of the (pre) configuration, may know that, within a timeslot, the SL WUS resource (pre) configured by the base station 210 starts at the first symbol (i.e., “sl-WUS StartSymbol-r19 sym 0” ) and the length of the SL WUS resource is 1 symbol (i.e. “sl-WUS LengthSymbol-r19 sym 1” ) . Therefore, the user equipment 220 knows that it can perform SL WUS transmission or reception on the (pre) configured SL WUS resource defined by the starting symbol and the symbol length. In other words, the first symbol in the timeslot is (pre) configured to be used as SL WUS resource.

On the other hand, as “sl-StartSymbol-r16 sym2” indicates the symbols for sidelink transmission start at the third symbol (i.e., {#sym2} ) . As “sl-LengthSymbols-r16 sym12” indicates the length of the symbols for sidelink transmission is12 symbols. In other words, the third to fourteenth symbols in the timeslot are for sidelink transmission.

So it is can be seen that, the SL WUS resource (i.e., the first symbol in the timeslot) is separated from the SL PSCCH/PSSCH region (the third to fourteenth symbols in the timeslot) . In other words, the SL WUS resource is out of the SL PSCCH/PSSCH region. Besides, since the SL WUS resource starts at the first symbol and has a length of one symbol, and the SL PSCCH/PSSCH region starts at the third symbol, there is a gap, i.e., the second symbol, between the SL WUS resource and the SL PSCCH/PSSCH region. In such a case, the second symbol is a GP symbol after the SL WUS resource and before the SL PSCCH/PSSCH region, as illustrated in FIG. 4A.

Alternatively, the base station 210 may (pre) configure a starting symbol for SL WUS transmission; but may not (pre) configure a symbol length. In this case, the user equipment 220 may determine the SL WUS symbol based on the (pre) configured starting symbol for SL WUS transmission, sl-StartSymbol-r16 (the SL WUS resource is located before the SL PSCCH/PSSCH) and whether GP symbol exists (here, GP is fixed to 1 symbol or there is no GP is assigned after SL WUS and before PSCCH/PSSCH) .

Specifically, for example, the base station 210 may transmit the following (pre) configuration to the user equipment 220.

The user equipment 220, on receipt of the above (pre) configuration, may know that, within a timeslot, the SL WUS resource (pre) configured by the base station 210 starts at the first symbol (i.e., “sl-WUS StartSymbol-r19 sym 0” ) . Also, based on “sl-StartSymbol-r16 sym2” , the user equipment 220 can infer that the symbols for SL transmission start at #sym2 (i.e., the third symbol in the slot) . So, it can be seen that the second symbol is not specified in the (pre) configuration. In that case, the user equipment 220 considers it to be a GP symbol, as illustrated in FIG. 4A.

Therefore, the user equipment 220 knows that it can perform SL WUS transmission or reception on the (pre) configured SL WUS resource defined by the starting symbol, the “sl-StartSymbol-r16” parameter and whether a GP symbol exists.

FIG. 4B illustrates a schematic diagram of another example SL WUS resource 400B in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 400B will be described with reference to FIG. 4A. The (pre) configuration of SL WUS resource 400B may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

The difference between the example of FIG. 4B and FIG. 4A is the (pre) configuration from the base station 210. Specifically, in the example illustrated in FIG. 4B, the base station 210 (pre) configures a symbol length and a starting symbol for SL WUS transmission or reception, as showing below. The user equipment 220 determines the SL WUS symbol based on the starting symbol and symbol length. For example, the base station 210 may transmit the following (pre) configuration to the user equipment 220. For example, the (pre) configuration may be as below:

On the other hand, as “sl-StartSymbol-r16 sym1” indicates the symbols for sidelink transmission start at the second symbol (i.e., {#sym1} ) . As “sl-LengthSymbols-r16 sym13” indicates the length of the symbols for sidelink transmission is 13 symbols. In other words, the second to fourteenth symbols in the timeslot are for sidelink transmission.

So it is can be seen that, the SL WUS resource (i.e., the first symbol in the timeslot) is separated from the SL PSCCH/PSSCH region (the second to fourteenth symbols in the timeslot) . In other words, the SL WUS resource is out of the SL PSCCH/PSSCH region. Besides, since the SL WUS resource starts at the first symbol and has a length of one symbol, and the SL PSCCH/PSSCH region starts at the second symbol, so there is no gap between the SL WUS resource and the SL PSCCH/PSSCH region. In such a case, the timeslot has no GP symbol before the SL PSCCH/PSSCH region, and the SL PSCCH/PSSCH region follows directly after the SL WUS resource.

The user equipment 220, on receipt of the above (pre) configuration, may know that, within a timeslot, the SL WUS resource (pre) configured by the base station 210 starts at the first symbol (i.e., “sl-WUS StartSymbol-r19 sym 0” ) . Also, based on “sl-StartSymbol-r16 sym1” , the user equipment 220 can infer that the symbols for SL transmission start at #sym1 (i.e., the second symbol in the slot) . So, it can be seen that there is no gap between the first symbol (which is (pre) configured to be SL WUS resource) and the second symbol (which is (pre) configured as the start symbol of the SL PSCCH/PSCCH resource) . In that case, the user equipment 220 considers that there is no GP symbol, i.e., the SL PSCCH/PSSCH region starts directly after the SL WUS resource, without a GP region between them, as illustrated in FIG. 4B.

FIG. 5A illustrates a schematic diagram of an example SL WUS resource 500A in accordance with aspects of the present disclosure, and FIG. 5B illustrates a schematic diagram of another example SL WUS resource 500B in accordance with aspects of the present disclosure. The (pre) configuration of SL WUS resource 500A and 500B may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

The base station 210 may (pre) configure a symbol length and starting symbol for SL WUS transmission. The user equipment 220 may determine the SL WUS symbol (s) based on the starting symbol and symbol length. For example, the base station 210 may transmit the (pre) configuration to the user equipment 220.

In this case, as indicated by “sl-StartSymbol-r19 sym0” and “sl-LengthSymbols-r19 sym14” , the whole timeslot (starting at the #sym0 and lasts for 14 symbols) is (pre) configured for SL transmission, among which SL WUS resource is defined as “sl-WUS StartSymbol-r19 sym 0” and “sl-WUS LengthSymbol-r19 sym 2” . In other words, the SL WUS resource starts at the first symbol and lasts for 2 symbols, as illustrated in FIG. 5A and 5B. Here, GP which is assigned after SL WUS and before PSCCH/PSSCH is fixed to 1 symbol (for example, FIG. 5A) or there is no GP is assigned after SL WUS and before PSCCH/PSSCH (for example, FIG. 5B) . In such a case, since the SL WUS resource is part of the defined SL PSCCH/PSSCH region for SL transmission, it is also referred to as SL WUS resource within SL PSCCH/PSSCH region.

GP symbol (s) can also be utilized for SL WUS resource. This will be described in more detail in FIGS. 6A, 6B and 6C.

FIG. 6A illustrates a schematic diagram of an example SL WUS resource 600A in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 600A will be described with reference to FIG. 1D. The (pre) configuration of SL WUS resource 600A may involve a user equipment (UE) 220 as illustrated in FIG. 1A) and a base station (BS) 210 as illustrated in FIG. 1A) .

In the example illustrated in FIG. 6A, the base station (pre) configures SL WUS on a GP symbol in a normal timeslot (a timeslot without PSFCH region) , for example, like a timeslot 100D as illustrated in FIG. 1D. In 3GPP Rel-16, a timeslot within a BWP is (pre) configured with sl-StartSymbol-r16 {sym#0} and sl-LengthSymbols-r16 {sym14} . Since the last symbol of a full timeslot in Rel-16 is (pre) defined as a GP symbol (for TX/RX switching) , that GP symbol (i.e., {sym#13} ) can be (pre) configured (for a Rel-19 UE, or UE which supports further release or supports the enhancement of WUS) as an SL WUS symbol.

Here, the Rel-19 UE (or UE which supports further release or supports the enhancement of WUS) , which is (pre) configured to monitor the SL WUS, is not (pre) configured to perform sidelink transmission in Rel-16 BWP/resource pool. In other words, separate resource pools for Rel-16 (symbol #0 to #12) and for Rel-19 (also referred to as a Rel-19 UE, i.e., an SL WUS reception UE) are (pre) configured. Specifically, resource pools for Rel-16 is defined as symbol #0 to #12, while resource pools for Rel-19 is defined as symbol #13 (i.e., {sym#13) . Separate resource pools for Rel-16 and for Rel-19 are (pre) configured in order not to perform PSCCH/PSSCH transmission in the timeslot for SL WUS reception (shared resource pools among Rel-16 and Rel-19 UE) or Rel-19 UE (i.e., a SL WUS transmission UE) is (pre) configured not to perform PSCCH/PSSCH reception in the timeslot for SL WUS transmission.

FIG. 6B illustrates a schematic diagram of another example SL WUS resource 600B in accordance with aspects of the present disclosure. The (pre) configuration of SL WUS resource 600B may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

FIG. 6B differs from FIG. 6A in that, in the frequency domain, the SL WUS takes up 6 RBs. Therefore, for the GP symbol (i.e., {sym#13} ) in a subchannel with a frequency domain size of 25 RBs, the GP region can accommodate 4 SL WUS. In other words, the GP region is replaced by an SL WUS region for 4 SL WUS.

FIG. 6C illustrates a schematic diagram of further another example SL WUS resource 600C in accordance with aspects of the present disclosure. The (pre) configuration of SL WUS resource 600C may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

FIG. 6C illustrates 6 timeslots, each of which is a normal timeslot (i.e., a timeslot without a PSFCH region) . The GP region (i.e., {sym#13} ) in the first, third, fourth and sixth timeslots are (pre) configured for SL WUS. Specifically, the base station 210 (pre) configures one SL WUS in the GP region of the first and fourth timeslots, while (pre) configures two SL WUS in the GP region of the third and sixth timeslots.

The frequency domain length of SL WUS resource (resource region) is (pre) configured as a BWP, or a resource pool, or one or more subchannels. In the example illustrated in FIG. 6C, the frequency domain length of SL WUS resource is 4 subchannels. Alternatively, if the frequency domain size of each subchannel is 20 RBs, the frequency domain length of SL WUS resource is 80 RBs (= 20 RBs per subchannel * (4 subchannels) ) . Alternatively, if the frequency domain size of each subchannel is 25 RBs (for example, as illustrated in FIGS. 1D or 1E) , the frequency domain length of SL WUS resource illustrated in FIG. 6C is 100 RBs (= 25 RBs per subchannel * (4 subchannels) ) .

In the examples illustrated in FIGS. 6A, 6B and 6C, the symbol index of the (pre) configured SL WUS resource may be indicated by the base station 210 to the user equipment 220. For example, the base station 210 may include the symbol index of the (pre) configured SL WUS resource in a configuration information (like the first configuration information 201 as illustrated in FIG. 2) and transmit the configuration information to the user equipment 220.

The frequency domain granularity (of each SL WUS resource) is (pre) configured as one or more RB (s) , or one or more subchannel (s) (4 or 2 subchannel in FIG. 6C) . Specifically, in the example illustrated in FIG. 6B, each SL WUS resource takes up 6 RBs in the frequency domain, so the frequency domain granularity is 6 RBs. In the example illustrated in FIG. 6C, the frequency domain granularity of the SL WUS resource (pre) configured in the GP symbol in the first and fourth timeslots is 4 subchannels, while the frequency domain granularity of the SL WUS resource (pre) configured in the GP symbol in the third and sixth timeslots is 2 subchannels. It is can be seen that the frequency domain granularity of the SL WUS resource can be same or difference size for difference timeslots.

FIG. 7 illustrates a schematic diagram of an example SL WUS resource 700 in accordance with aspects of the present disclosure. For the purpose of discussion, the SL WUS resource 700 will be described with reference to FIG. 1E. The (pre) configuration of SL WUS resource 700 may involve a user equipment (UE) 220 as illustrated in FIG. 2 and a base station (BS) 210 as illustrated in FIG. 2.

In the example illustrated in FIG. 7, SL WUS is (pre) configured on GP symbols in a timeslot with PSFCH region, for example, like a timeslot 100E as illustrated in FIG. 1E. This is because, when a timeslot within a BWP is (pre) configured with sl-StartSymbol-r16 {sym0} and sl-LengthSymbols-r16 {sym14} , and PSFCH region is (pre) configured in the timeslot, since the last symbol (i.e., {#sym13} ) and the last symbol (i.e., {#sym10} ) prior to PSFCH symbols (i.e., {#sym11, #sym12} ) in Rel-16 are (pre) defined as GP symbols (for TX/RX switching) , these symbols (i.e., {sym#10, sym#13} ) can be (pre) configured as SL WUS symbols for a Rel-19 UE.

Here, the Rel-19 UE, which is (pre) configured to monitor the SL WUS, is not (pre) configured to perform sidelink transmission or PSFCH transmission in Rel-16 BWP/resource pool. In other words, separate resource pools for Rel-16 (symbol#0 to #9 and #11 to #12) and for Rel-19 (also referred to as Rel-19 UE, i.e., a SL WUS reception UE) are (pre) configured. Specifically, resource pools for Rel-16 is defined as symbol#0 to #9 and #11 to #12, while resource pools for Rel-19 is defined as symbol#10 to #12 as illustrated in FIG. 7. Since the GP symbols in the timeslot are all used for SL WUS resource, there is now no GP symbols for TX/RX switching. Therefore, a UE (for example, a Rel-19 UE, like UE 220 as illustrated in FIG. 2) is assumed not to perform PSCCH/PSSCH transmission and PSFCH transmission in the same timeslot for SL WUS reception (shared resource pools among Rel-16 and Rel-19 UE) . In addition or as an alternative, a Rel-19 UE (for example, a SL WUS transmission UE) is (pre) configured not to perform PSCCH/PSSCH reception and PSFCH reception in the timeslot for SL WUS transmission. More specifically, if the Rel-19 UE performs SL WUS transmission on the SL WUS resource, it prevents from performing PSCCH/PSSCH/PSFCH reception in the timeslot. In addition or as an alternative, if the Rel-19 UE performs SL WUS reception on the SL WUS resource, it prevents from performing PSCCH/PSSCH/PSFCH transmission in the timeslot.

FIG. 8 illustrates an example of a device 800 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The device 800 may be an example of a UE 220 as described herein. The device 800 may support wireless communication with one or more network entities 102, UEs 104, core networks 106 or any combination thereof. The device 800 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 802, a memory 804, a transceiver 806, and, optionally, an I/O controller 808. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .

The processor 802, the memory 804, the transceiver 806, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 802, the memory 804, the transceiver 806, or various combinations or components thereof may support a method for performing one or more of the operations described herein.

In some implementations, the processor 802, the memory 804, the transceiver 806, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 802 and the memory 804 coupled with the processor 802 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 802, instructions stored in the memory 804) .

For example, the processor 802 may support wireless communication at the device 800 in accordance with examples as disclosed herein. The processor 802 may be configured to operable to support a means for receiving, from a base station, a first configuration information (for example, the first configuration information 201 as illustrated in FIG. 2) indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel/physical sidelink shared channel (PSCCH/PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a gap period (GP) symbol; and performing, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.

The processor 802 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 implementations, the processor 802 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 802. The processor 802 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 804) to cause the device 800 to perform various functions of the present disclosure.

The memory 804 may include random access memory (RAM) and read-only memory (ROM) . The memory 804 may store computer-readable, computer-executable code including instructions that, when executed by the processor 802 cause the device 800 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 802 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 804 may include, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The I/O controller 808 may manage input and output signals for the device 800. The I/O controller 808 may also manage peripherals not integrated into the device 800. In some implementations, the I/O controller 808 may represent a physical connection or port to an external peripheral. In some implementations, the I/O controller 808 may utilize an operating system such as or another known operating system. In some implementations, the I/O controller 808 may be implemented as part of a processor, such as the processor 806. In some implementations, a user may interact with the device 800 via the I/O controller 808 or via hardware components controlled by the I/O controller 808.

In some implementations, the device 800 may include a single antenna 810. However, in some other implementations, the device 800 may have more than one antenna 810 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 806 may communicate bi-directionally, via the one or more antennas 810, wired, or wireless links as described herein. For example, the transceiver 806 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 806 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 810 for transmission, and to demodulate packets received from the one or more antennas 810. The transceiver 806 may include one or more transmit chains, one or more receive chains, or a combination thereof.

A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 810 for transmitting the amplified signal into the air or wireless medium.

A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 810 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

FIG. 9 illustrates an example of a device 900 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The device 900 may be an example of a base station 210 as described herein. The device 900 may support wireless communication with one or more network entities 102, UEs 104, core networks 106 or any combination thereof. The device 900 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 902, a memory 904, a transceiver 906, and, optionally, an I/O controller 908. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .

The processor 902, the memory 904, the transceiver 906, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 902, the memory 904, the transceiver 906, or various combinations or components thereof may support a method for performing one or more of the operations described herein.

In some implementations, the processor 902, the memory 904, the transceiver 906, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 902 and the memory 904 coupled with the processor 902 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 902, instructions stored in the memory 904) .

For example, the processor 902 may support wireless communication at the device 900 in accordance with examples as disclosed herein. The processor 902 may be configured to operable to support a means for determining one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol; and transmitting, to a user equipment (UE) , a first configuration information (for example, the first configuration information 201 as illustrated in FIG. 2) indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.

The processor 902 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 implementations, the processor 902 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 902. The processor 902 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 904) to cause the device 900 to perform various functions of the present disclosure.

The memory 904 may include random access memory (RAM) and read-only memory (ROM) . The memory 904 may store computer-readable, computer-executable code including instructions that, when executed by the processor 902 cause the device 900 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 902 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 904 may include, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The I/O controller 908 may manage input and output signals for the device 900. The I/O controller 608 may also manage peripherals not integrated into the device 900. In some implementations, the I/O controller 908 may represent a physical connection or port to an external peripheral. In some implementations, the I/O controller 908 may utilize an operating system such as or another known operating system. In some implementations, the I/O controller 908 may be implemented as part of a processor, such as the processor 906. In some implementations, a user may interact with the device 900 via the I/O controller 908 or via hardware components controlled by the I/O controller 908.

In some implementations, the device 900 may include a single antenna 910. However, in some other implementations, the device 900 may have more than one antenna 910 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 906 may communicate bi-directionally, via the one or more antennas 910, wired, or wireless links as described herein. For example, the transceiver 906 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 906 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 910 for transmission, and to demodulate packets received from the one or more antennas 910. The transceiver 906 may include one or more transmit chains, one or more receive chains, or a combination thereof.

A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 610 for transmitting the amplified signal into the air or wireless medium.

A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 910 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

FIG. 10 illustrates an example of a processor 1000 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The processor 1000 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 1000 may include a controller 1002 configured to perform various operations in accordance with examples as described herein. The processor 1000 may optionally include at least one memory 1004, such as L1/L2/L3 cache. Additionally, or alternatively, the processor 1000 may optionally include one or more arithmetic-logic units (ALUs) 1006. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) . In some example embodiments of the present disclosure, the processor 1000 may be included in the user equipment (UE) (for example, UE 220 as illustrated in FIG. 2) .

The processor 1000 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 1000) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .

The controller 1002 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 800 to cause the processor 1000 to support various operations of a UE 220 in accordance with examples as described herein. For example, the controller 1002 may operate as a control unit of the processor 1000, generating control signals that manage the operation of various components of the processor 1000. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.

The controller 1002 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 1004 and determine subsequent instruction (s) to be executed to cause the processor 1000 to support various operations in accordance with examples as described herein. The controller 1002 may be configured to track memory address of instructions associated with the memory 1004. The controller 1002 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 1002 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 1000 to cause the processor 1000 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 1002 may be configured to manage flow of data within the processor 1000. The controller 1002 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 1000.

The memory 1004 may include one or more caches (e.g., memory local to or included in the processor 1000 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 1004 may reside within or on a processor chipset (e.g., local to the processor 1000) . In some other implementations, the memory 1004 may reside external to the processor chipset (e.g., remote to the processor 1000) .

The memory 1004 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1000, cause the processor 1000 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 1002 and/or the processor 1000 may be configured to execute computer-readable instructions stored in the memory 1004 to cause the processor 1000 to perform various functions. For example, the processor 1000 and/or the controller 1002 may be coupled with or to the memory 1004, and the processor 1000, the controller 1002, and the memory 1004 may be configured to perform various functions described herein. In some examples, the processor 1000 may include multiple processors and the memory 1004 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.

The one or more ALUs 1006 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 1006 may reside within or on a processor chipset (e.g., the processor 1000) . In some other implementations, the one or more ALUs 1006 may reside external to the processor chipset (e.g., the processor 1000) . One or more ALUs 1006 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 1006 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 1006 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 800 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 1006 to handle conditional operations, comparisons, and bitwise operations.

The processor 1000 may support wireless communication in accordance with examples as disclosed herein. The processor 1000 may be configured to or operable to support a means for receiving, from a base station, a first configuration information (for example, the first configuration information 201 as illustrated in FIG. 2) indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel /physical sidelink shared channel (PSCCH/PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a gap period (GP) symbol; and performing, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.

FIG. 11 illustrates an example of a processor 1100 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The processor 1100 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 1100 may include a controller 1102 configured to perform various operations in accordance with examples as described herein. The processor 1100 may optionally include at least one memory 1104, such as L1/L2/L3 cache. Additionally, or alternatively, the processor 1100 may optionally include one or more arithmetic-logic units (ALUs) 1106. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) . In some example embodiments of the present disclosure, the processor 1100 may be included in a base station (for example, BS 210 as illustrated in FIG. 2) .

The processor 1100 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 1100) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .

The controller 1102 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 1100 to cause the processor 1100 to support various operations of the base station 210 in accordance with examples as described herein. For example, the controller 1102 may operate as a control unit of the processor 1100, generating control signals that manage the operation of various components of the processor 1100. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.

The controller 1102 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 1104 and determine subsequent instruction (s) to be executed to cause the processor 1100 to support various operations in accordance with examples as described herein. The controller 1102 may be configured to track memory address of instructions associated with the memory 1104. The controller 1102 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 1102 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 1100 to cause the processor 1100 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 1102 may be configured to manage flow of data within the processor 1100. The controller 1102 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 1100.

The memory 1104 may include one or more caches (e.g., memory local to or included in the processor 1100 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 1104 may reside within or on a processor chipset (e.g., local to the processor 1100) . In some other implementations, the memory 1104 may reside external to the processor chipset (e.g., remote to the processor 1100) .

The memory 1104 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1100, cause the processor 1100 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 1102 and/or the processor 1100 may be configured to execute computer-readable instructions stored in the memory 1104 to cause the processor 1100 to perform various functions. For example, the processor 1100 and/or the controller 1102 may be coupled with or to the memory 1104, and the processor 1100, the controller 1102, and the memory 1104 may be configured to perform various functions described herein. In some examples, the processor 1100 may include multiple processors and the memory 1104 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.

The one or more ALUs 1106 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 1106 may reside within or on a processor chipset (e.g., the processor 1100) . In some other implementations, the one or more ALUs 1106 may reside external to the processor chipset (e.g., the processor 1100) . One or more ALUs 1106 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 1106 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 1106 may be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 1106 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 1106 to handle conditional operations, comparisons, and bitwise operations.

The processor 1100 may support wireless communication in accordance with examples as disclosed herein. The processor 1100 may be configured to or operable to support a means for determining one of the following: a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a guard period (GP) symbol; and transmitting, to a user equipment (UE) , a first configuration information (for example, the first configuration information 201 as illustrated in FIG. 2) indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.

FIG. 12 illustrates a flowchart of a method 1200 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The operations of the method 1200 may be implemented by a device or its components as described herein. For example, the operations of the method 1200 may be performed by a UE 220 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

At 1210, the method may include receiving, from a base station (for example, base station 210 as illustrated in FIG. 2) , a first configuration information (for example, first configuration information 201 as illustrated in FIG. 2) indicative of one of a first time domain resource, a second time domain resource or a third time domain resource. Here, the first time domain resource is separate from a PSCCH/PSSCH resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a GP symbol.

At 1220, the method may include performing, based on the first configuration information, SL WUS transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.

FIG. 13 illustrates a flowchart of a method 1300 that supports SL WUS resource (pre) configuration in accordance with aspects of the present disclosure. The operations of the method 1300 may be implemented by a device or its components as described herein. For example, the operations of the method 1300 may be performed by a BS 210 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

At 1310, the method may include determining one of the following: a first time domain resource separate from a PSCCH/PSSCH resource, a second time domain resource within a PSCCH/PSSCH resource, or a third time domain resource on a GP symbol. At 1320, the method may include transmitting, to a UE (for example, UE 220 as illustrated in FIG. 2) , a first configuration information (for example, the first configuration information 201 as illustrated in FIG. 2) indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.

It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an 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 the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.

As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such 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) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on”shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A user equipment (UE) comprising:

a processor; and

a transceiver coupled to the processor,

wherein the processor is configured to:

receive, via the transceiver and from a base station, first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a guard period (GP) symbol; and

perform, via the transceiver and based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource, or the third time domain resource.
The UE of claim 1, wherein the processor is further configured to:

receive, via the transceiver and from the base station, second configuration information indicative of a fourth time domain resource, wherein the fourth time domain resource comprises one of a frame, a subframe, or a timeslot; and

perform, via the transceiver and based on the second configuration information, SL WUS transmission or reception on full or partial of the fourth time domain resource.
The UE of claim 2, wherein the second configuration information is a bit sequence, a first bit value in the bit sequence indicates that a frame, a subframe or a timeslot has a SL WUS resource, and a second bit value in the bit sequence indicates that a frame, a subframe or a timeslot does not have a SL WUS resource.
The UE of claim 3, wherein a length of the bit sequence corresponds to a first number of frames in the case that the second configuration information is per frame, and the length of the bit sequence corresponds to a second number of subframes or timeslots in the case that the second configuration information is per subframe or timeslot.
The UE of claims2, wherein the second configuration information comprises a period and a time offset, the period represents a time interval between two adjacent fourth time domain resources, and the time offset represents a time offset between the first frame/subframe/timeslot in the period and the frame/subframe/timeslot with the fourth time domain resource in the same period.
The UE of claim 2, wherein the full or partial of the fourth time domain resource is configured by the base station per bandwidth part (BWP) .
The UE of any of claims 1 to 6, wherein the first configuration information comprises a symbol index of one of the first time domain resource, the second time domain resource, or the third time domain resource.
The UE of claim 1, wherein the first configuration information comprises a starting symbol of the one of the first time domain resource, the second time domain resource, or the third time domain resource.
The UE of claim 8, wherein the first configuration information further comprises a symbol length of the one of the first time domain resource, second time domain resource, or the third time domain resource.
The UE of claim 8, wherein the processor is further configured to:

determine the SL WUS symbol based on the starting symbol, a configuration parameter, and whether a GP symbol exists.
The UE of claim 10, wherein the configuration parameter indicates a starting symbol in a predefined time slot.
The UE of claim 9, wherein the processor is further configured to:

determine the SL WUS symbol based on the starting symbol and the symbol length.
The UE of claim 1, wherein the first configuration information indicates the third time domain resource, in the case that the timeslot comprise the third time domain resource the processor is further configured to:

prevent from performing PSCCH/PSSCH transmission in the timeslot; and

perform, via the transceiver, SL WUS reception on the third time domain resource.
The UE of claim 1, wherein the first configuration information indicates the third time domain resource, in the case that the timeslot comprise the third time domain resource, and the processor is further configured to:

prevent from performing PSCCH/PSSCH reception in the timeslot; and

perform, via the transceiver, SL WUS transmission on the third time domain resource.
The UE of claim 1, wherein the first configuration information indicates the third time domain resource, in the case that the timeslot comprising the third time domain resource is a timeslot with a PSFCH region, and the processor is further configured to:

prevent from performing PSFCH transmission in the timeslot; and

perform, via the transceiver, SL WUS reception on the third time domain resource.
The UE of claim 1, wherein the first configuration information indicates the third time domain resource, in the case that the timeslot comprising the third time domain resource is a timeslot with a PSFCH region, and the processor is further configured to:

prevent from performing PSFCH reception in the timeslot; and

perform, via the transceiver, SL WUS transmission on the third time domain resource.
A processor for wireless communication, comprising:

at least one memory; and

a controller coupled with the at least one memory and configured to cause the controller to:

receive, from a base station, a first configuration information indicative of one of a first time domain resource, a second time domain resource or a third time domain resource, wherein the first time domain resource is separate from a physical sidelink control channel /physical sidelink shared channel (PSCCH/PSSCH) resource, the second time domain resource is within a PSCCH/PSSCH resource, and the third time domain resource is on a gap period (GP) symbol; and

perform, based on the first configuration information, sidelink (SL) wake up signal (WUS) transmission or reception on the one of the first time domain resource, the second time domain resource or the third time domain resource.
A base station comprising:

a processor; and

a transceiver coupled to the processor,

wherein the processor is configured to:

determine one of the following:

a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource,

a second time domain resource within a PSCCH/PSSCH resource, or

a third time domain resource on a guard period (GP) symbol; and

transmit, via the transceiver and to a user equipment (UE) , first configuration information indicative of the one of the first time domain resource, the second time domain resource, or the third time domain resource.
The base station of claim 18, wherein the processor is further configured to:

determine, a fourth time domain resource comprising one of a frame, a subframe or a timeslot; and

transmit, via the transceiver and to the user equipment, second configuration information indicative of the fourth time domain resource.
A method performed by a base station, the method comprising:

determining one of the following:

a first time domain resource separate from a physical sidelink control channel (PSCCH) /physical sidelink shared channel (PSSCH) resource,

a second time domain resource within a PSCCH/PSSCH resource, or

a third time domain resource on a guard period (GP) symbol; and

transmitting, to a user equipment (UE) , a first configuration information indicative of the one of the first time domain resource, the second time domain resource or the third time domain resource.