Wake-up Signal (WUS) Sleep

Abstract

A wireless communication method performed by a first device. The method includes suspending wake-up signal (WUS) monitoring for a specified period of time, for a number of cycles, or until a message for resuming the monitored is received. The method further includes resuming wake-up signal monitoring after the specified period of time, after the number of cycles, or after receiving the message for resuming the monitored.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims the benefit of U.S. Patent Application No. 17 / 153,086, entitled "WAKE UP SIGNAL (WUS) DORMANCY", filed on January 20, 2021, which in turn claims the benefit of U.S. Provisional Patent Application No. 62 / 964,077, entitled "WAKE UP SIGNAL (WUS) DORMANCY", filed on January 21, 2020. The disclosures of these applications are hereby incorporated by reference in their entireties. Field of the Disclosure

[0003] Aspects of the present disclosure generally relate to wireless communication, and more particularly, to techniques and apparatuses for power - saving signaling. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple - access technology capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple - access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single - Carrier Frequency Division Multiple Access (SC - FDMA) systems, Time Division - Synchronous Code Division Multiple Access (TD - SCDMA) systems, and Long Term Evolution (LTE). LTE / Advanced LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include a number of base stations (BSs) capable of supporting communication for several user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a base station may be referred to as a B - node, gNB, access point (AP), radio head, transmission and reception point (TRP), New Radio (NR) BS, 5th Generation (5G) B - node, and so on.

[0006] The above multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate at the urban, national, regional, and even global levels. New Radio (NR) (which may also be referred to as the fifth generation (5G)) is an enhanced set of the Long Term Evolution (LTE) mobile standard promulgated by the 3rd Generation Partnership Project (3GPP). New Radio (NR) is designed to better support mobile broadband Internet access by using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the Downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the Uplink (UL), and supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technology, and carrier aggregation to improve spectral efficiency, reduce costs, improve services, utilize new spectrums, and better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access techniques and the telecommunication standards that employ these techniques. Summary of the Invention

[0007] A wireless communication method performed by a first device. The method includes suspending Wake-Up Signal (WUS) monitoring for a specified period of time, for a number of cycles, or until a message instructing resumption of monitoring is received. The method further includes resuming Wake-Up Signal monitoring after the specified period of time, after the number of cycles, or after receiving the message instructing resumption of monitoring.

[0008] A wireless communication method performed by a first device. The method includes receiving a Wake-Up Signal (WUS) indication via lower layer signaling. The method further includes performing a power saving operation based on the received WUS indication.

[0009] A device includes a processor and a memory coupled to the processor. The device further includes instructions stored in the memory. When the instructions are executed by the processor, the device is operable to receive a Wake-Up Signal (WUS) indication via lower layer signaling. The device is further operable to perform a power saving operation based on the received WUS indication.

[0010] A device includes a processor and a memory coupled to the processor. The device further includes instructions stored in the memory. When the instructions are executed by the processor, the device is operable to receive a Wake-Up Signal (WUS) indication via lower layer signaling. The device is further operable to perform a power saving operation based on the received WUS indication.

[0011] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure in an effort to enable the following detailed description to be better understood. Additional features and advantages will be described. The disclosed concepts and specific examples can be readily used as a basis for modifying or designing other structures for carrying out the same purposes as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the disclosed concepts, both as to their organization and method of operation, as well as the associated advantages, will be better understood upon consideration of the following description in conjunction with the accompanying drawings. Each drawing is provided for purposes of illustration and description, and is not intended to define a limitation of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To gain a more detailed understanding of the features described above in connection with the present disclosure, reference may be made to the aspects described in more detail below, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only some typical aspects of the present disclosure and should not be considered to limit its scope, as the description may admit of other equally effective aspects. Like reference numerals in different drawings may identify the same or similar elements.

[0013] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0014] Figure 2 is a block diagram conceptually illustrating an example of a base station and a user equipment (UE) in communication in a wireless communication network in accordance with various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of base station side determination of a selected power saving signal configuration for a power saving signal in accordance with various aspects of the present disclosure.

[0016] Figure 4 is a diagram illustrating an example of user equipment (UE) side determination of a selected power saving signal configuration for a power saving signal in accordance with various aspects of the present disclosure.

[0017] Figure 5 is a diagram illustrating an example of user equipment (UE) side scaling of a power saving signal configuration based at least in part on a channel condition in accordance with various aspects of the present disclosure.

[0018] Figure 6A and 6B is a diagram illustrating an example of user equipment (UE) side wake-up signal (WUS) activation / deactivation configuration for power saving in accordance with various aspects of the present disclosure.

[0019] Figure 7It is a diagram illustrating an example of a user equipment (UE)-side wake-up signal (WUS) sleep configuration for power saving according to various aspects of the present disclosure.

[0020] Figure 8 It is a flowchart illustrating an example process, such as that performed by a user equipment or a base station, according to various aspects of the present disclosure.

[0021] Figure 9 It is a flowchart illustrating an example process, such as that performed by a user equipment or a base station, according to various aspects of the present disclosure.

[0022] Figure 10 It is a flowchart illustrating an example process, such as that performed by a user equipment or a base station, according to various aspects of the present disclosure. Detailed Description

[0023] Various aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the present disclosure. For example, any number of the aspects set forth may be used to implement an apparatus or practice a method. Additionally, the scope of the present disclosure is intended to cover such apparatus or methods practiced using other structures, functionality, or a combination of structures and functionality that supplement or are additional to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of a claim.

[0024] Certain aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0025] It should be noted that although aspects may be described using terms typically associated with fifth-generation (5G) and later wireless technologies, aspects of the present disclosure may be applied in communication systems based on other generations, such as and including third-generation (3G) and / or fourth-generation (4G) technologies.

[0026] Discontinuous reception (DRX) is a power saving mode in which a user equipment (UE) can skip reception of downlink channels as a power saving technique. A DRX cycle includes an "ON duration" period during which the UE monitors control channels (such as the physical downlink control channel (PDCCH)). The DRX cycle also includes a DRX period during which monitoring of the control channel is skipped. The UE and / or the base station can use various power saving signals to improve the power efficiency of the UE. For example, a wake-up signal (WUS) can improve efficiency during a DRX cycle (such as a connected mode DRX (CDRX) cycle). When the wake-up signal is not received, the UE can skip the monitoring opportunity (e.g., the wake-up signal (WUS) opportunity) or the ON duration of the CDRX cycle, and can wake up during the next monitoring opportunity or ON duration after receiving the WUS. Thus, the UE can save battery power by activating a low complexity receiver (such as a WUS subsystem) until the WUS is received.

[0027] For the 3rd Generation Partnership Project (3GPP) Release 16, a wake-up signal (WUS) based on the physical downlink control channel (PDCCH) was accepted into the 3GPP New Radio (NR) standard. Although the PDCCH-based WUS can improve efficiency during a discontinuous reception (DRX) cycle (such as a connected mode DRX (CDRX) cycle), the benefits of WUS power saving are traffic dependent. For example, consider user equipment (UE) with similar configurations, where a first UE processes periodic data traffic and a second UE processes bursty data traffic. In this example, when WUS is configured, a large number (e.g., 80%) of UEs with periodic data traffic (e.g., extended reality (XR), such as virtual reality and augmented reality data) experience power savings. In contrast, almost all (e.g., 99%) of the UEs with bursty data traffic (e.g., File Transfer Protocol (FTP) data) experience power savings when WUS is configured.

[0028] As mentioned above, when the data traffic is bursty (e.g., File Transfer Protocol (FTP) data), the Wake-Up Signal (WUS) works well; however, when the data traffic is periodic (e.g., Extended Reality (XR) data), it may be efficient not to use WUS. Based on these examples, for some applications, it may not be useful to monitor WUS in each DRX cycle. According to the 3rd Generation Partnership Project (3GPP) New Radio (NR) standard, the WUS configuration is currently configured by the network at the Radio Resource Control (RRC) layer. Currently, after the WUS configuration, WUS may be fully activated or deactivated. Adaptive WUS configuration by the network (e.g., gNB) or by the User Equipment (UE) is desired. Unfortunately, the current WUS activation and deactivation by RRC configuration using RRC signaling incur significant latency (e.g., 19 milliseconds).

[0029] In aspects of the present disclosure, a Media Access Control (MAC) activation / deactivation indicator or a Physical Layer (L1) Wake-Up Signal (WUS) activation / deactivation indicator for dynamically changing traffic is described. In some aspects, the MAC control element provides WUS activation / deactivation, which may be referred to as a Wake-Up Signal (WUS) Media Access Control - Control Element (MAC-CE). In other aspects, a Physical Layer L1 field (e.g., a single new bit (or group of bits) is added to the Physical Downlink Control Channel (PDCCH) to support WUS activation / deactivation).

[0030] In one aspect, a signature (e.g., a bit sequence) is assigned, where the User Equipment (UE) identifies a known signature in an existing field (e.g., a control channel field) for activating or deactivating WUS. For example, a first signature may be assigned for activation, while a second signature may be assigned for deactivation. Similarly, scrambling codes may be used, where a first scrambling code is assigned for deactivation, a second code is assigned for activation, and a third code is assigned for normal use. Data bits may be used (e.g., in the Physical Downlink Shared Channel (PDSCH)), in which case an indicator is provided in the PDCCH. In these examples, the base station may also use a relay station to respond to WUS.

[0031] Figure 1FIG. 0 is a diagram of a network 100 in which aspects of the present disclosure may be practiced. Network 100 may be a fifth generation (5G) or New Radio (NR) network or some other wireless network, such as a Long Term Evolution (LTE) network. The wireless network 100 may include several base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UE) and may also be referred to as a base station, NR BS, Node B (NB), gNB, 5G NB, access point, transmission reception point (TRP), etc. Each base station may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” may refer to the coverage area of a base station and / or the base station subsystem serving that coverage area, depending on the context in which the term is used.

[0032] A base station (BS) may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unrestricted access by user equipment (UE) having a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE having a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by a UE associated with the femto cell (e.g., a UE in a Closed Subscriber Group (CSG)). A base station for a macro cell may be referred to as a macro BS. A base station for a pico cell may be referred to as a pico BS. A base station for a femto cell may be referred to as a femto BS or a home BS. In the Figure 1 example shown in FIG. 5, BS110a may be a macro BS for macro cell 102a, BS110b may be a pico BS for pico cell 102b, and BS110c may be a femto BS for femto cell 102c. A base station may support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B (NB),” “5G NB,” and “cell” may be used interchangeably herein.

[0033] In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station. In some aspects, base stations may be interconnected with each other and / or to one or more other base stations or network nodes (not shown) in the access network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or analogs using any suitable transport network.

[0034] The wireless network 100 may also include relay stations. A relay station is an entity that can receive a data transmission from an upstream station (e.g., a base station (BS) or a user equipment (UE)) and send the data transmission to a downstream station (e.g., a UE or a base station). A relay station can also be a UE that can relay transmissions for other user equipments (UEs). In Figure 1 the example shown in, relay station 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS, relay base station, relay, etc.

[0035] The wireless network 100 can be a heterogeneous network that includes different types of base stations (e.g., macro base stations, pico base stations, femto base stations, relay base stations, etc.). These different types of base stations may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro base station may have a high transmit power level (e.g., 5 to 40 watts), while pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0036] The network controller 130 may be coupled to a set of base stations and may provide coordination and control for these base stations. The network controller 130 can communicate with the base stations via a backhaul. These base stations may also communicate with each other directly or indirectly, e.g., via a wireless or wired backhaul.

[0037] User equipments (UEs) 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each user equipment (UE) 120 can be stationary or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system (GPS) device, or any other suitable device configured to communicate via a wireless or wired medium.

[0038] Some user equipment (UE) may be considered machine type communication (MTC) UE, or evolved or enhanced machine type communication (eMTC) UE. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the network, for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, and / or may be implemented as narrowband (NB)-IoT devices. Some UEs may be considered customer premise equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, etc.

[0039] Generally, any number of wireless networks may be deployed in a given geographical area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. The RAT may also be referred to as a radio technology, an air interface, etc. The frequency may also be referred to as a carrier, a frequency channel, etc. Each frequency may support a single radio access technology (RAT) in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, a new radio (NR) or fifth generation (5G) RAT network may be deployed.

[0040] In some aspects, two or more user equipment (UE) 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., communicate with each other without using base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0041] As indicated above, Figure 1 is provided merely as an example. Other examples may be different from those Figure 1 described herein.

[0042] Figure 2 A block diagram of design 200 of base station 110 and user equipment (UE) 120 is shown, where base station 110 and UE 120 may be Figure 1One of each base station and one of each user equipment (UE). The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, where generally T≥1 and R≥1.

[0043] At the base station 110, the transmit processor 220 may receive data for one or more user equipments (UEs) from the data source 212, select one or more modulation and coding schemes (MCSs) for the UE at least in part based on the channel quality indicator (CQI) received from each user equipment (UE), process (e.g., encode and modulate) the data for the UE at least in part based on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols when applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process its respective output symbol stream (e.g., for orthogonal frequency division multiplexing (OFDM), etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from the modulators 232a to 232t may be transmitted via the T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0044] At user equipment (UE) 120, antennas 252a through 252r may receive downlink signals from base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for orthogonal frequency division multiplexing (OFDM), etc.) to obtain received symbols. A multiple-input multiple-output (MIMO) detector 256 may obtain the received symbols from all R DEMODs 254a through 254r, perform MIMO detection on the received symbols when applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. A channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0045] On the uplink, at user equipment (UE) 120, a transmit processor 264 may receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a transmit multiple-input multiple-output (TX-MIMO) processor 266 when applicable, further processed by demodulators (DEMOD) 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. At base station 110, the uplink signals from UE 120 and other user equipment (UE) may be received by antennas 234, processed by demodulators 254, detected by a MIMO detector 236 when applicable, and further processed by a receive processor 238 to obtain the decoded data and control information transmitted by UE 120. The receive processor 238 may provide the decoded data to data sink 239 and provide the decoded control information to controller / processor 240. Base station 110 may include a communication unit 244 and communicate with network controller 130 via communication unit 244. Network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0046] The controller / processor 240 of base station 110, the controller / processor 280 of user equipment (UE) 120, and / or Figure 2 any other component(s) thereof may perform one or more techniques associated with wake-up signal (WUS) activation and sleep, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, or Figure 2 any other component(s) thereof may perform or direct the operation of, for example, Figure 8 process 800 of Figure 9 process 900 of Figure 10 process 1000 of, or other processes as described herein. Memories 242 and 282 may store data and program code for base station 110 and UE 120, respectively. Scheduler 246 may schedule user equipment (UE) for data transmission on the downlink and / or uplink.

[0047] In some aspects, user equipment (UE) 120 may include means for receiving, means for executing, means for suspending, means for resuming, means for transmitting, and means for analyzing. Such means may include one or more components of UE 120 or base station 110 in conjunction with Figure 2 as described.

[0048] As indicated above, Figure 2 is provided merely by way of example. Other examples may be different from what is described with respect to Figure 2 as described.

[0049] As described above, user equipment (UE) and / or base station may use various power saving signals to improve the power efficiency of the UE. For example, a wake-up signal (WUS) may improve efficiency during a discontinuous reception (DRX) cycle (such as a connected mode DRX (CDRX) cycle). When the WUS is not received, the UE may skip the monitoring occasion or on-duration of the CDRX cycle and may wake up during the next monitoring occasion or on-duration after the WUS is received. Thus, the UE may save battery power by only activating a low-complexity receiver (such as a wake-up signal subsystem) until the wake-up signal is received. Another type of power saving signal may cause the UE to skip one or more monitoring occasions (e.g., a specific number of monitoring occasions, all monitoring occasions, until the WUS is received, etc.). This type of power saving signal may be referred to as a go-to-sleep signal (GTS).

[0050] In some aspects, a power saving signal (e.g., a wake-up signal (WUS), a go-to-sleep signal (GTS), or another type of signal) may carry information related to power consumption for a user equipment (UE) (such as a parameter or a value of a state related to power consumption). For example, the parameter may indicate an active carrier group (e.g., carrier aggregation), a bandwidth (e.g., a bandwidth part (BWP) configuration), a connected mode discontinuous reception (CDRX) configuration (e.g., an on-duration length, a CDRX cycle length, an inactive timer, etc.), a control channel configuration (e.g., a physical downlink control channel (PDCCH) monitoring periodicity, a control resource set (CORESET) bandwidth, etc.), and other information.

[0051] In some cases, different types of devices supporting different types of applications and / or services may coexist in a cell. Examples of different types of devices include user equipment (UE) handsets, client equipment (CPE), vehicles, Internet of Things (IoT) devices, etc. Examples of different types of applications include ultra-reliable low-latency communication (URLLC) applications, massive machine type communication (mMTC) applications, enhanced mobile broadband (eMBB) applications, vehicle-to-everything (V2X) applications, etc. Additionally, in some cases, a single device may support different applications or services simultaneously.

[0052] The power saving signal may need to meet different constraints for different device types, applications, and / or services. For example, the power saving signal may need to meet a reliability constraint (e.g., regarding the false alarm and / or misdetection probability) or a coverage, latency, and / or detection complexity (e.g., regarding the user equipment (UE) capabilities). As a more specific example, ultra-reliable low-latency communication (URLLC) may specify a low misdetection probability and a low detection latency for the power saving signal, while massive machine type communication (mMTC) may require a low detection energy for the power saving signal. Due to these different (sometimes conflicting) constraints, a single type or a single configuration of power saving signal may not meet all the constraints for all UE types, applications, or services. Additionally, designing the power saving signal based at least in part on the most stringent of these constraints may result in significant overhead and may not perform optimally in many cases.

[0053] Some of the techniques and apparatuses described can provide for selecting a power saving signal configuration from a set of power saving signal configurations. For example, a power saving signal configuration can identify parameters or configuration values for transmitting or receiving a power saving signal. A user equipment (UE) can be configured with a set of power saving signal configurations corresponding to power saving signals to be used in different scenarios (e.g., used by different types of user equipment (UEs), for different services, for different applications, etc.). The UE and / or the base station can determine a selected power saving signal configuration from the set of power saving signal configurations and can transmit or receive a power saving signal according to the selected power saving signal configuration. In this way, power saving signals can be provided in a manner that complies with the constraints of different UE types, applications, and / or services, thereby improving network performance and UE power efficiency.

[0054] Figure 3 FIG. 300 is a diagram illustrating an example of base station side determination of a selected power saving signal configuration for a power saving signal in accordance with various aspects of the present disclosure.

[0055] As Figure 3 shown in FIG. 310 and indicated by reference numeral 310, in some aspects, a base station 110 can provide information identifying a set of power saving signal configurations to a user equipment (UE) 120. The set of power saving signal configurations can identify power saving signal configurations to be selected for transmitting or receiving a power saving signal based at least in part on one or more criteria. In some aspects, the power saving signal can correspond to a particular UE, a particular group of user equipment (UEs), a particular UE type, a particular service, a particular group of services, a particular application, a particular group of applications, etc. By way of example only, the set of power saving signal configurations can identify a first power saving signal configuration to be used by the UE when the UE is to perform enhanced mobile broadband (eMBB) communication and a second power saving signal configuration to be used by the UE when the UE is to perform ultra-reliable low latency communication (URLLC) communication.

[0056] In some aspects, a user equipment (UE) 120 can store information identifying the set of power saving signal configurations. For example, the UE 120 can store information identifying the set of power saving signal configurations at least in part based on information received from the base station 110 identifying the set of power saving signal configurations, or can store information identifying the set of power saving signal configurations independently of the base station 110 (e.g., at least in part based on a wireless communication standard or specification, manufacturer configuration, etc.).

[0057] In some aspects, the power saving signal configuration may identify the type of power saving signal (e.g., a control channel-based power saving signal such as a physical downlink control channel (PDCCH)-based power saving signal, a reference signal (RS)-based power saving signal, a sequence-based power saving signal, etc.). In some aspects, the power saving signal configuration may identify the configuration information for a specific type of power saving signal. For example, when the power saving signal is a PDCCH-based power saving signal, the power saving signal configuration may identify the channel decoding scheme (e.g., repetition-based, simplex, Reed-Muller, polar, convolutional decoding, etc.), whether to use cyclic redundancy check (CRC) (e.g., to provide a lower false alarm probability), the control channel element (CCE) aggregation level, the number of symbols of the power saving signal, and so on. As another example, when the power saving signal is an RS-based power saving signal or a sequence-based power saving signal, the power saving signal configuration may identify the bandwidth, the resource element (RE) density, the number of repetitions, the beam sweeping configuration (e.g., the number of beams, the direction of the beams, the quasi-co-location relationship for the power saving signal, etc.).

[0058] As shown by reference numeral 320, the base station 110 may determine the selected power saving signal configuration. In some aspects, the user equipment (UE) 120 may determine the selected power saving signal configuration, as described in more detail below in conjunction with Figure 4 In some aspects, the base station 110 may determine the selected power saving signal configuration for a specific time period (e.g., a time slot, a subframe, a connected mode discontinuous reception (CDRX) cycle, etc.), a specific frequency (e.g., a bandwidth part, a carrier, a frequency band), a specific spatial resource (e.g., a beam, a direction, etc.), and so on. In some aspects, the base station 110 may determine the selected power saving signal configuration for a group of user equipment (UEs), for all UEs covered by the base station 110, etc. In some aspects, the base station 110 may determine the selected power saving signal configuration for a single UE. For example, the base station 110 may determine the corresponding power saving signal configuration for one or more UEs covered by the base station 110.

[0059] In some aspects, the base station 110 may determine the selected power saving signal configuration based at least in part on the channel condition. In some aspects, the base station 110 may determine the selected power saving signal configuration based at least in part on the user equipment (UE) mobility state. For example, the base station 110 may determine that a cell-edge UE 120 or a high-mobility UE 120 will use a reference signal (RS)-based power saving signal to improve coverage, or that a cell-center UE 120 or a low-mobility UE 120 will use a physical downlink control channel (PDCCH)-based power saving signal to improve power management information provision. In some aspects, the base station 110 may determine the selected power saving signal configuration based at least in part on a measurement report from the UE 120. For example, the UE 120 may provide a measurement report to the base station 110 ( Figure 3 not shown in

[0060] In some aspects, the base station 110 may determine the power saving signal configuration based at least in part on a request for a power saving signal configuration. For example, the user equipment (UE) 120 may determine (e.g., based at least in part on the criteria described above or other criteria) a desired power saving signal configuration and may provide a request indicating the desired power saving signal configuration to the base station 110 ( Figure 3 not shown in

[0061] As indicated by reference numeral 330, the base station 110 may provide information indicating the selected power saving signal configuration to the user equipment (UE) 120. In some aspects, the base station 110 may provide this information as downlink control information, radio resource control information, media access control (MAC) control element (CE), etc. In this way, the base station 110 may indicate the selected power saving signal configuration to the UE 120, thereby saving the processor resources of the UE 120 that would otherwise be used to determine the selected power saving signal configuration at the UE 120. In some aspects, the base station 110 may provide information identifying the respective power saving signal configurations to multiple user equipments (UEs) 120. In some aspects, the base station 110 may not signal to the UE 120 the selected power saving signal configuration, thereby saving the signaling resources of the base station 110. In such a case, the UE 120 may determine the selected power saving signal configuration independently of the base station 110 (e.g., based at least in part on the set of power saving signal configurations), or may perform blind decoding using assumptions based at least in part on the set of power saving signal configurations, as described in more detail below.

[0062] As indicated by reference numeral 340, base station 110 may transmit one or more power saving signals (shown as “(a) power saving signal(s)”) based at least in part on one or more power saving signal configurations. For example, in a scenario where base station 110 signals a selected power saving signal configuration, base station 110 may transmit one or more power saving signals based at least in part on the selected power saving signal configuration. In some aspects, base station 110 may transmit one or more power saving signals according to a plurality of different selected power saving signal configurations (e.g., when one or more power saving signals include a plurality of power saving signals to be received by user equipment (UE) 120 associated with different selected power saving signal configurations).

[0063] As an illustrative example, assume that a first user equipment (UE) 120 is at the cell edge of a cell served by base station 110, and a second UE 120 is at the cell center of the cell. In that case, base station 110 may select a first power saving signal configuration for the first UE 120 from a set of power saving signal configurations, and may select a second power saving signal configuration for the second UE 120 from the set of power saving signal configurations. The first power saving signal configuration may indicate a reference signal (RS)-based power saving signal to be transmitted for the first UE 120, and may indicate the bandwidth, number of repetitions, etc. for the RS-based power saving signal. The second power saving signal configuration may indicate a physical downlink control channel (PDCCH)-based power saving signal to be transmitted for the second UE 120, and may indicate the channel decoding scheme, the presence of cyclic redundancy check (CRC), etc. for the PDCCH-based power saving signal. Base station 110 may generate and transmit the RS-based power saving signal according to the first power saving signal configuration, and may generate and transmit the PDCCH-based power saving signal according to the second power saving signal configuration. Thereby, base station 110 efficiently provides wake-up signals for the first UE 120 and the second UE 120, although the channel conditions and requirements of the first UE 120 and the second UE 120 are different. Thereby, the network efficiency and power management of base station 110, the first UE 120, and the second UE 120 are improved.

[0064] In some aspects, the power saving signal may include a wake-up signal. In some aspects, the power saving signal may include a sleep entry signal. In some aspects, the power saving signal may include information for performing power management (e.g., information for a user equipment (UE) 120 to trigger a parameter change or a state change related to power consumption). For example, the parameter change may relate to an active carrier group (e.g., for carrier aggregation), bandwidth (e.g., bandwidth part (BWP) configuration), connected mode discontinuous reception (CDRX) configuration (e.g., on-duration length, CDRX cycle length, inactive timer, etc.), control channel configuration (e.g., physical downlink control channel (PDCCH) monitoring periodicity, control resource set (CORESET) bandwidth, etc.), and so on.

[0065] In some aspects, the reference signal (RS)-based wake-up signal may be at least partially based on a channel state information reference signal, a tracking reference signal, a demodulation reference signal, or different types of reference signals. In some aspects, the sequence-based wake-up signal may be at least partially based on a preamble, a physical control format indicator channel (PCFICH), and so on. In some aspects, the physical downlink control channel (PDCCH)-based wake-up signal may be at least partially based on a downlink control information format.

[0066] As indicated by reference numeral 350, the user equipment (UE) 120 may receive one or more power saving signals at least partially based on a selected power saving signal configuration. For example, at least partially based on the selected power saving signal configuration, the UE 120 may monitor a specific bandwidth or sub-band, may monitor specific time, space, or frequency resources, may search a specific search space, may perform decoding at least partially based on the indicated channel decoding scheme, may perform cyclic redundancy check (CRC) in a specific manner, may decode a specific number of repetitions, and so on.

[0067] In some aspects, user equipment (UE) 120 may perform blind decoding at least in part based on multiple different assumptions. For example, base station 110 may determine a selected power saving signal configuration and may not indicate the selected power saving signal configuration to UE 120. In such a case, UE 120 may perform a search at least in part based on the assumptions until a power saving signal is detected. The assumptions may be at least in part based on the set of power saving signal configurations, a subset of the set of power saving signal configurations, and so on. In some aspects, base station 110 may provide information indicating that the selected power saving signal configuration for all power saving signals is to be transmitted by base station 110. User equipment (UE) 120 covered by base station 110 may perform a blind search at least in part based on the selected power saving signal configuration until each UE 120 identifies the power saving signal associated with that UE 120 (e.g., at least in part based on encoding the power saving signal using values specific to that UE 120). This may reduce the overhead associated with signaling each selected power saving signal configuration to the corresponding UE 120.

[0068] As indicated by reference numeral 360, user equipment (UE) 120 may perform power saving operations at least in part based on a power saving signal received from base station 110 as indicated by reference numeral 370. For example, when the power saving signal is a wake-up signal, UE 120 may wake up during the next on-duration. As another example, when the power saving signal is a go-to-sleep signal, UE 120 may skip one or more on-durations at least in part based on the go-to-sleep signal. As yet another example, UE 120 may adjust parameters related to power management (such as transmit power), bandwidth, number of active component carriers, connected mode discontinuous reception (CDRX) cycle configuration, and so on. In some aspects, when the power saving signal pertains to a particular application or group of applications, UE 120 may perform power saving operations for that particular application or group of applications. In some aspects, when the power saving signal pertains to a particular service or group of services, UE 120 may perform power saving operations for that particular service or group of services.

[0069] In this way, the power saving signal can be configured to meet the constraints or specifications of different user equipments (UEs), and different channel conditions for different UEs can be taken into account. For example, each power saving signal configuration in the power saving signal configuration set can be configured on a per-application, per-service, and / or per-user equipment (UE) basis. Configuring the power saving signal configuration on a per-application basis may mean that the first power saving signal configuration is configured for the first application, the second power saving signal is configured for the second application, and so on. The per-UE and per-service bases are defined similarly. Therefore, the reliability of the power saving signal can be improved, and UE power management can be more reliably managed, thereby improving UE power efficiency.

[0070] As indicated above, Figure 3 is provided as an example. Other examples may be different from those Figure 3 described herein.

[0071] Figure 4 is a diagram of example 400 that illustrates a UE-side determination of a selected power saving signal configuration according to various aspects of the present disclosure.

[0072] As in Figure 4 and shown by reference numeral 410 in the drawings, in some aspects, the user equipment (UE) 120 may determine the selected power saving signal configuration. For example, the UE 120 may determine the selected power saving signal configuration at least in part based on the following: the channel condition at the UE 120, the mobility state of the UE 120, the measurements performed by the UE 120, the applications associated with the UE 120, the services used by the UE 120 for communication, previous power saving signals (e.g., for a failure to receive a previous power saving signal, for a successful reception of a previous power saving signal, etc.), and so on.

[0073] As indicated by reference numeral 420, base station 110 may transmit one or more power saving signals based at least in part on a selected power saving signal configuration. For example, in some cases, user equipment (UE) 120 may signal to base station 110 a request for a selected power saving signal configuration. In such a case, base station 110 may transmit a power saving signal (shown as reference numeral 450) based at least in part on the selected power saving signal configuration, thereby saving the signaling resources of base station 110 that would otherwise be used to determine the selected power saving signal configuration and the processor resources that would otherwise be used to transmit multiple different power saving signals to UE 120. In some aspects, base station 110 may transmit multiple different power saving signals based at least in part on the set of power saving signal configurations known to UE 120 and base station 110. In such a case, UE 120 may receive a power saving signal of the multiple different power saving signals based at least in part on the selected power saving signal configuration. Thereby, the signaling resources of UE 120 that would otherwise be used to indicate the selected power saving signal to base station 110 are saved.

[0074] As indicated by reference numeral 430, user equipment (UE) 120 may receive one or more power saving signals based at least in part on a selected power saving signal configuration. This is described in more detail above in connection with Figure 3 As indicated by reference numeral 440, UE 120 may perform power saving operations based at least in part on one or more power saving signals. This is also described in more detail above in connection with Figure 3 more detail.

[0075] In this way, user equipment (UE) 120 may determine a selected power saving signal configuration and may receive power saving signals based at least in part on the selected power saving signal configuration. Thereby, the resources of base station 110 that would otherwise be used to determine the selected power saving signal configuration for UE 120 are saved.

[0076] As indicated above, Figure 4 is provided as an example. Other examples may be different from what is described with respect to Figure 4 what is described.

[0077] Figure 5 is a diagram of example 500 illustrating user equipment (UE)-side scaling of a power saving signal configuration based at least in part on channel conditions in accordance with aspects of the present disclosure. As shown, Figure 5Include UE 120-1 and UE 120-2. In some aspects, UE 120-1 and UE 120-2 may be associated with a UE group or may be part of the same UE group. In some aspects, UE 120-1 and UE 120-2 may not be associated with a UE group (e.g., may not be part of the same UE group).

[0078] As shown by reference numeral 510, base station 110 may transmit one or more power saving signals for user equipments (UEs) 120-1 and 120-2. As further shown, base station 110 may perform multiple repetitions of one or more power saving signals and may transmit one or more power saving signals with bandwidth B. In such a case, UEs 120-1 and 120-2 may use a common power saving signal (e.g., a power saving signal using group-specific signaling when UEs 120-1 and 120-2 are associated with the same UE group). Thus, base station 110 may configure the power saving signal to meet the most stringent requirements of UEs 120-1 and 120-2. For example, base station 110 may configure the power saving signal to meet the most stringent reliability requirement, the most stringent latency requirement, the most stringent transmission energy requirement, etc.

[0079] As shown by reference numeral 520, user equipment (UE) 120-1 may determine that the channel quality of UE 120-1 meets a threshold. For example, UE 120-1 may determine that the channel quality meets a quality threshold, indicating that the channel quality is good. Thus, and as shown by reference numeral 530, UE 120-1 may monitor a subband of bandwidth B and / or a subset (e.g., a proper subset) of the repetitions of one or more power saving signals. Thereby, UE 120-1 may save the monitoring resources that would otherwise be used to monitor the entire bandwidth B and / or all repetitions of the power saving signals.

[0080] As shown by reference numeral 540, user equipment (UE) 120-2 may determine that the channel quality of UE 120-2 fails to meet a threshold. For example, UE 120-2 may determine that the channel quality does not meet a quality threshold, indicating that the channel quality is poor. Thus and as shown by reference numeral 550, UE 120-2 may monitor all of bandwidth B (e.g., the entire bandwidth of one or more power saving signals) and / or all repetitions of one or more power saving signals. Thereby, UE 120-2 may increase the likelihood of receiving the power saving signal.

[0081] In this way, user equipment (UE) 120-1 and UE 120-2 can perform UE-side scaling of the power saving signal. For example, each UE 120-1, 120-2 in the UE group can determine a corresponding monitoring configuration at least partially based on the conditions at that UE, thereby reducing the number of different power saving signal configurations to be used by the base station, which saves resources of the base station.

[0082] The operations described in conjunction Figure 5 are mainly described with reference to channel quality. However, other factors can be used to perform the operations described in conjunction Figure 5 described. As an example, the factor can relate to reliability requirements (e.g., a UE or application specifying a higher reliability level can monitor more repetitions or a wider bandwidth compared to a user equipment (UE) or application not specifying a higher reliability). As another example, the factor can relate to UE capabilities. For example, if a UE has a larger number of antennas, due to the receive diversity of the UE with a larger number of antennas, the UE can monitor fewer repetitions than a UE with a smaller number of antennas.

[0083] As indicated above, Figure 5 is provided as an example. Other examples can be different from what is described with respect to Figure 5 described.

[0084] For the 3rd Generation Partnership Project (3GPP) Release 16, the wake-up signal (WUS) based on the physical downlink control channel (PDCCH) is included in the 3GPP new radio (NR) standard. Although the PDCCH-based WUS can be used to improve efficiency during discontinuous reception (DRX) cycles such as connected mode DRX (CDRX) cycles, the benefit of WUS power saving is traffic-dependent. For example, assume user equipment (UEs) with similar configurations, where the first UE processes periodic data traffic and the second UE processes bursty data traffic. In this example, when WUS is configured, a large number (e.g., 80%) of UEs with periodic data traffic (e.g., extended reality (XR), such as virtual reality and augmented reality data) experience power saving. In contrast, almost all (e.g., 99%) of the UEs with bursty data traffic (e.g., File Transfer Protocol (FTP) data) experience power saving when WUS is configured.

[0085] According to the Third Generation Partnership Project (3GPP) New Radio (NR) standard, the Wake-up Signal (WUS) configuration is currently configured by the network at the Radio Resource Control (RRC) layer. Additionally, after the WUS configuration, the WUS may be fully activated or deactivated. Adaptive WUS configuration depending on traffic is desired, either by the network (e.g., base station) or by the User Equipment (UE). Unfortunately, current WUS activation / deactivation is performed through RRC configuration using RRC signaling, which exhibits significant latency (e.g., 19 milliseconds).

[0086] According to aspects of the present disclosure, a Media Access Control (MAC) activation / deactivation indicator or a Physical Layer (L1) Wake-up Signal (WUS) activation / deactivation indicator for dynamically changing traffic is described. In some aspects, a MAC control element for WUS activation / deactivation is provided. In other aspects, a Physical Layer L1 field (e.g., a single new bit (or group of bits) is added to the Physical Downlink Control Channel (PDCCH) to support WUS activation / deactivation. In this example, the wake-up signal indication includes an activation signal or a deactivation signal from the Physical Layer (L1).

[0087] In one configuration, a signature (e.g., a bit sequence) is assigned, where the User Equipment (UE) would recognize the signature in an existing field for activating or deactivating the WUS. For example, a first signature may be assigned for activation, while a second signature may be assigned for deactivation. Similarly, scrambling codes may be used, where a first scrambling code may be assigned for deactivation, a second code may be assigned for activation, and a third code may be assigned for normal use. Data bits may be used (e.g., in the Physical Downlink Shared Channel (PDSCH)), in which case an indicator is provided in the PDCCH. In these examples, the base station may also use a relay station to respond to the wake-up signaling.

[0088] Figure 6A and 6B is a diagram illustrating an example of User Equipment (UE)-side Wake-up Signal (WUS) activation / deactivation configuration for power saving according to aspects of the present disclosure. As described, Discontinuous Reception (DRX) is a power saving mode where the UE can skip receiving the downlink channel to save power. As shown in diagram 600 of Figure 6A the DRX cycle 610 includes an on-duration 612 during which the UE monitors a control channel (such as the Physical Downlink Control Channel (PDCCH)). The DRX cycle 610 may also include a DRX period during the remainder of the DRX cycle 610 in which monitoring of the control channel is skipped.

[0089] In accordance with aspects of the present disclosure, a user equipment (UE) and / or a base station may use various power saving signals to improve the power efficiency of the UE. For example, a wake-up signal (WUS) 620 may improve efficiency during a discontinuous reception (DRX) cycle 610, such as a connected mode DRX (CDRX) cycle. When the WUS 620 is not received (e.g., lack of WUS 622), the UE may skip the monitoring occasion or turn-on duration of the CDRX cycle. In this example, the UE goes to sleep after detecting the lack of WUS 622 and may wake up during the next monitoring occasion or turn-on duration 614 after receiving the WUS 630. Thus, the UE may save battery power by activating a low-complexity receiver, such as a wake-up signal subsystem, until a wake-up signal (e.g., WUS 620 / 630) is received.

[0090] As Figure 6A shown, during a connected mode discontinuous reception (CDRX) cycle, the WUS 620 is sent from a base station (e.g., gNB) to a user equipment (UE) before or at the start of the DRX turn-on duration 612. The WUS 620 is a signal used by the base station to convey to the UE whether to wake up during the next DRX turn-on duration (e.g., 612) to prepare for data reception. In this example, since the UE does not receive the WUS (e.g., lack of WUS 622 and lack of WUS 624), the UE remains asleep until the next WUS occasion (e.g., WUS 630) across multiple DRX cycles.

[0091] As mentioned above, when the data traffic is bursty (e.g., File Transfer Protocol (FTP) data), the wake-up signaling works well; however, when the data traffic is periodic (e.g., extended reality (XR) (such as virtual reality and augmented reality data)), it may be efficient not to use the wake-up signaling. Based on these examples, for some applications, it may not be useful to monitor the wake-up signal (WUS) in each discontinuous reception (DRX) cycle 610. In accordance with aspects of the present disclosure, a media access control (MAC) activation / deactivation indicator or a physical layer (L1) WUS activation / deactivation indicator for dynamically changing traffic is described.

[0092] Figure 6B FIG. 650 is a diagram illustrating an example of a user equipment (UE)-side wake-up signal (WUS) activation / deactivation configuration for power saving in accordance with various aspects of the present disclosure. In some aspects, a media access control - control element (MAC-CE) is provided for WUS activation / deactivation. In other aspects, a physical layer (L1) field (e.g., a single new bit (or group of bits) is added to a physical downlink control channel (PDCCH) to support WUS activation / deactivation.

[0093] Figure 6B The illustration 650 in Figure 6A is similar to the illustration 600 in Figure 6A , except that the lack of the WUS signal 622 shown in Figure 6B is received as the WUS signal 625 in Figure 6B . Receiving the WUS signal 625 triggers an on-duration 652. In this example, WUS monitoring is deactivated after the on-duration 652. When WUS monitoring is deactivated, the UE does not monitor the WUS. As a result of the UE not monitoring the WUS, the UE does not receive the WUS, as indicated by the lack of WUS 670. In this example, WUS monitoring is then activated, and the UE detects the next WUS 680. The MAC or physical layer that activates and deactivates the WUS can depend on the type of traffic that the base station is transmitting to the UE. When the WUS is activated, the previous WUS configuration is cleared from the UE buffer.

[0094] In accordance with aspects of the present disclosure, a signature (e.g., a bit sequence) is assigned for activation and / or deactivation of a wake-up signal (WUS). For example, a user equipment (UE) identifies a signature in an existing field (e.g., an existing control channel field) for activating or deactivating the WUS. For example, a first signature may be assigned for activation, while a second signature may be assigned for deactivation. Similarly, scrambling codes may be used, where a first scrambling code may be assigned for deactivation, a second code may be assigned for activation, and a third code may be assigned for normal use. Data bits may be used (e.g., in a physical downlink shared channel (PDSCH)), in which case an indicator is provided in the physical downlink shared channel (PDSCH). In these examples, the base station may also use a relay station to respond to the wake-up signaling.

[0095] Figure 7 is an illustration that depicts an example of a user equipment (UE)-side wake-up signal (WUS) sleep configuration for power saving in accordance with various aspects of the present disclosure. In Figure 7 , the illustration 700 depicts an example of a UE-side WUS sleep configuration for power saving in accordance with various aspects of the present disclosure. Figure 7 The illustration 700 in Figure 6B is similar to the illustration 650 in Figure 6B , where the WUS signal 625 triggers an on-duration 652. In this example, WUS sleep is activated after the on-duration 652. The UE does not monitor the WUS during a WUS sleep period 750, in which the WUS will not be received because, for example, the application expects to receive data for a period of time (e.g., periodic data from a VR application for several C-DRX cycles), and thus the UE remains awake to receive the data. In other words, WUS monitoring is not required. In Figure 7In the example, the WUS sleep includes a first WUS sleep period 710 and a second WUS sleep period 730. However, during the WUS sleep period 750, the UE maintains the WUS configuration in its buffer. Thus, the UE in WUS sleep achieves faster implementation than the implementation of WUS activation and deactivation.

[0096] During the WUS sleep period 750, the base station transmits data 725, 745 during a first on-duration 720 and a second on-duration 740. For example, an application may trigger periodic data transmission. The WUS sleep period 750 coincides with the time when the UE expects to receive data 725, 745 during the on-durations 720, 740 because the UE does not need to monitor WUS when the UE is expecting to receive data. For example, an application that will receive periodic data 725, 745 may be running, and the periodic data 725, 745 allows the UE to enter WUS sleep. In this example, WUS monitoring is then activated after the WUS sleep period 750 ends (e.g., it may occur after a timer expires or, for example, based on the application) and the UE detects WUS 680.

[0097] According to aspects of the present disclosure, a wake-up signal (WUS) sleep period 750 may last for a time duration (e.g., the WUS sleep period 750). During the WUS sleep period 750, the WUS configuration remains the same, but the monitoring of WUS is skipped. During the WUS sleep period 750, the user equipment (UE) skips the monitoring of WUS for the time duration, which may be indicated by: (a) a timer (e.g., the number of discontinuous reception (DRX) cycles or a time period); or (b) a message received from the network to start monitoring WUS again. In Figure 7 the example, the WUS sleep period 750 is shown as including a first WUS sleep period 710 and a second WUS sleep period 730, during which the transmitted data 725, 745 is received during a first on-duration 720 and a second on-duration 740.

[0098] From an implementation perspective, the latency for transitioning a user equipment (UE) from a wake-up signal (WUS) sleep state to a non-sleep state or vice versa is lower than the mentioned WUS monitoring activation / deactivation latency because the configuration is maintained during sleep. During a sleep / non-sleep transition, the UE may request a WUS suspension for a time duration (e.g., M connected-mode discontinuous reception (CDRX) cycles), as shown in WUS sleep period 750, where M = 2. The sleep / non-sleep transition may be desirable for an application when the UE knows how long the application initiated by the mobile originator will run. In such a case, the UE sets the WUS sleep period 750 to the length of the application run time.

[0099] For example, in the case of network-initiated traffic, the base station may also decide to place the UE in the WUS sleep mode or take the UE out of the WUS sleep mode. According to these aspects of the present disclosure, physical layer (L1) or media access control (MAC) (L2) signaling may be used to indicate WUS sleep activation and deactivation. Alternatively, there may be pre-agreed rules where the network and the UE agree that if a certain application is launched on the UE, WUS sleep occurs for a period of time. In these aspects, compared to full WUS activation / deactivation, WUS sleep beneficially reduces the radio resource control (RRC) signaling overhead associated with WUS.

[0100] Figure 8 FIG. is a diagram illustrating an example process 800 for wake-up signal (WUS) activation / deactivation, for example, performed by a user equipment (UE) according to various aspects of the present disclosure. The process 800 for WUS activation / deactivation is an example.

[0101] As Figure 8 shown, in some aspects, the process 800 may include receiving a wake-up signal (WUS) indication via a lower layer (block 810). For example, the lower layer may be a physical (PHY) layer or a media access control (MAC) layer, which are lower layers relative to the radio resource control (RRC) layer. The lower layer message may include a field that includes one or more bits configured to provide a wake-up signal indication. A user equipment (UE) (e.g., using antenna 252, demodulator (DEMOD) 254, multiple-input multiple-output (MIMO) detector 256, receive processor 258, controller / processor 280, etc.) or a base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may receive the wake-up signal indication.

[0102] As Figure 8As shown, in some aspects, process 800 may include performing power saving operations (block 820) based on the received wake signal indication. For example, a UE (e.g., using controller / processor 280, etc.) or a base station (e.g., using controller / processor 240, etc.) may perform power saving operations. The power saving operations may include suspending WUS monitoring in response to receiving an instruction to suspend. The instruction may be within an extended control channel field. Process 800 may include maintaining a previously received wake signal configuration during the suspension. Process 800 may also include requesting the suspension for a specified period of time.

[0103] Figure 9 FIG. is an illustration of an example process 900 performed, for example, by a base station in accordance with various aspects of the present disclosure.

[0104] As Figure 9 shown, in some aspects, process 900 may include suspending wake-up signal (WUS) monitoring for a specified period of time, for several cycles, or until a message for resuming monitoring is received (block 910). As Figure 9 shown, in some aspects, process 900 may include resuming wake-up signal (WUS) monitoring after the specified period of time, after the several cycles, or after receiving a message for resuming monitoring (block 920). For example, a user equipment (UE) (e.g., using controller / processor 280) or a base station (e.g., using controller / processor 240, etc.) may suspend and resume WUS monitoring.

[0105] Figure 10 FIG. is an illustration of an example process 1000 performed, for example, by a first device in accordance with various aspects of the present disclosure. The first device may be a user equipment (UE) or a base station.

[0106] If the data is bursty (e.g., File Transfer Protocol (FTP) data), then the wake-up signal (WUS) works well. If the data is periodic (e.g., Extended Reality (XR) data), then it may be efficient not to use WUS. As Figure 10 shown, in some aspects, process 1000 may include analyzing a first data set to be transmitted to a second device, and the first device determines that the first data set to be transmitted has a first type (block 1010). As Figure 10As shown, in some aspects, process 1000 may include transmitting a WUS indication based on the determination, the WUS indication instructing the second device to resume WUS monitoring indefinitely, or to resume WUS monitoring for a first time period or for a first number of cycles (block 1020). In some aspects, process 1000 may include analyzing a second data set to be transmitted to the second device, the first device determining that the second data set to be transmitted has a second type (block 1030). In some aspects, process 1000 may include transmitting a WUS indication based on the determination, the WUS indication instructing the second device to stop WUS monitoring indefinitely, or to stop WUS monitoring for a second time period or for a second number of cycles (block 1040). For example, a user equipment (UE) (e.g., using antenna 252, modulator (MOD) 254, transmit multiple-input multiple-output (TX MIMO) detector 256, transmit processor 264, controller / processor 280, etc.) or a base station (e.g., using antenna 234, MOD 232, TX MIMO processor 230, transmit processor 220, controller / processor 240, etc.) may analyze data and transmit a WUS.

[0107] Although Figures 8 - 10 example blocks of processes 800, 900, and 1000 are shown, in some aspects, processes 800, 900, and 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks compared to the blocks depicted in Figures 8 - 10 Additional or alternatively, two or more blocks of processes 800, 900, and 1000 may be executed in parallel. Note that a base station or a user equipment (UE) may execute processes 800, 900, and 1000.

[0108] Implementing examples are described in the following numbered clauses:

[0109] 1. A wireless communication method performed by a first device, comprising:

[0110] Suspending wake-up signal (WUS) monitoring for a specified time period, for a number of cycles, or until a message instructing resumption of monitoring is received; and

[0111] Resuming wake-up signal monitoring after the specified time period, after the number of cycles, or after receiving the message instructing resumption of monitoring.

[0112] 2. The method of clause 1, further comprising maintaining a previously received wake-up signal configuration during the suspension.

[0113] 3. The method of any one of clauses 1-2, further comprising requesting suspension for the specified time period.

[0114] 4. A method according to any one of clauses 1 - 2, wherein the suspension occurs based on pre - agreed rules between a user equipment (UE) and a base station.

[0115] 5. A method according to any one of clauses 1 - 2, wherein the suspension occurs in response to receiving an instruction for suspension.

[0116] 6. A method according to any one of clauses 1 - 5, wherein the instruction is within an extended control channel field.

[0117] 7. A method according to any one of clauses 1 - 5, wherein the instruction is detected based on a scrambling code.

[0118] 8. A method according to any one of clauses 1 - 5, wherein the instruction is detected from a known signature within an existing control channel field.

[0119] 9. A method according to any one of clauses 1 - 5, wherein the instruction is detected from a wake - up signal (WUS) media access control - control element (MAC - CE).

[0120] 10. A method according to any one of clauses 1 - 9, wherein the suspension includes not monitoring wake - up signal (WUS) opportunities for WUS.

[0121] 11. A method according to any one of clauses 1 - 10, wherein the first device includes a user equipment (UE).

[0122] 12. A method according to any one of clauses 1 - 10, wherein the first device includes a base station.

[0123] 13. A wireless communication method performed by a first device, comprising:

[0124] Receiving a wake - up signal (WUS) indication via lower - layer signaling; and

[0125] Performing power - saving operations based on the received WUS indication.

[0126] 14. A method according to clause 13, wherein the first device includes a user equipment (UE).

[0127] 15. A method according to clause 13, wherein the first device includes a base station.

[0128] 16. A method according to any one of clauses 13 - 15, wherein the wake - up signal indication includes an activation signal or a de - activation signal from physical layer (L1) signaling.

[0129] 17. A method according to any one of clauses 13 - 15, wherein the wake - up signal indication is within an extended control channel field.

[0130] 18. A method according to any one of clauses 13 - 15, wherein the wake-up signal indication is detected based on a scrambling code.

[0131] 19. A method according to any one of clauses 13 - 15, wherein the wake-up signal indication is detected from a known signature within an existing control channel field.

[0132] 20. A method according to any one of clauses 13 - 15, wherein the wake-up signal indication includes an activation signal or a deactivation signal from Media Access Control (MAC) layer signaling.

[0133] 21. A device comprising:

[0134] a processor;

[0135] a memory coupled to the processor; and

[0136] instructions stored in the memory and operative, when executed by the processor, to cause the device to:

[0137] suspend wake-up signal (WUS) monitoring for a specified period of time, for a number of cycles, or until a message for resuming monitoring is received; and

[0138] resume wake-up signal monitoring after the specified period of time, after the number of cycles, or after receiving the message for resuming monitoring.

[0139] 22. The device according to clause 21, further comprising means for maintaining a previously received wake-up signal configuration during suspension.

[0140] 23. The device according to any one of clauses 21 - 22, further comprising means for requesting suspension for the specified period of time.

[0141] 24. The device according to any one of clauses 21 - 22, wherein the suspension occurs based on pre-agreed rules between a User Equipment (UE) and a base station.

[0142] 25. The device according to any one of clauses 21 - 22, wherein the suspension occurs in response to receiving an instruction for suspension.

[0143] 26. A device comprising:

[0144] a processor;

[0145] a memory coupled to the processor; and

[0146] instructions stored in the memory and operative, when executed by the processor, to cause the device to:

[0147] receive a wake-up signal (WUS) indication via lower layer signaling; and

[0148] Perform power saving operations based on the received WUS indication.

[0149] 27. The apparatus of clause 26, wherein the apparatus comprises a user equipment (UE).

[0150] 28. The apparatus of clause 26, wherein the apparatus comprises a base station.

[0151] 29. The apparatus of any one of clauses 26-28, wherein the wake-up signal indication comprises an activation signal or a deactivation signal from physical layer (L1) signaling.

[0152] 30. The apparatus of any one of clauses 26-28, wherein the wake-up signal indication is within an extended control channel field.

[0153] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be obtained by practicing the aspects.

[0154] As used herein, the term "component" is intended to be broadly construed as hardware, firmware, and / or a combination of hardware and software. As used, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0155] Some aspects are described in conjunction with a threshold. As used, depending on the context, meeting the threshold may mean that a value is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0156] It will be apparent that the described systems and / or methods may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual specific control hardware or software code for implementing these systems and / or methods does not limit the aspects. Thus, the operation and behavior of these systems and / or methods are described without reference to specific software code - understanding that software and hardware can be designed to implement these systems and / or methods at least in part based on the description herein.

[0157] Although specific feature combinations are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below may directly depend on only one claim, the disclosure of possible aspects includes each dependent claim in combination with every other claim in this group of claims. A phrase that recites "at least one of" a list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, a - b, a - c, b - c, and a - b - c, as well as any combination having multiple of the same element (e.g., a - a, a - a - a, a - a - b, a - a - c, a - b - b, a - c - c, b - b, b - b - b, b - b - c, c - c, and c - c - c, or any other ordering of a, b, and c).

[0158] An element, act, or instruction used should not be construed as critical or essential unless expressly described as such. Also, as used, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Further, as used, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used, the terms "having," "containing," "including," etc. are intended to be open - ended terms. Further, the phrase "based on" is intended to mean "at least partially based on" unless otherwise expressly stated.

Claims

1. A wireless communication method performed by a first device, comprising: Suspending wake-up signal (WUS) monitoring for a specified period of time, for several cycles, or until a message for resuming monitoring is received upon instruction; Maintaining a previously received WUS configuration during the suspension; and Resuming WUS monitoring after the specified period of time, after the several cycles, or after the message for resuming monitoring is received upon instruction, wherein the suspension occurs in response to an instruction for suspension received via lower layer signaling.

2. The method according to claim 1, further comprising requesting suspension for the specified period of time.

3. The method according to claim 1, wherein, The suspension occurs based on pre-agreed rules between a user equipment (UE) and a base station.

4. The method according to claim 1, wherein The instruction is within an extended control channel field.

5. The method according to claim 1, wherein, The instruction is detected based on a scrambling code.

6. The method according to claim 1, wherein, The instruction is detected from a known signature within an existing control channel field.

7. The method according to claim 1, wherein, The instruction is detected from a wake-up signal (WUS) medium access control - control element (MAC-CE).

8. The method according to claim 1, wherein Suspension includes not monitoring wake-up signal (WUS) opportunities for the WUS.

9. The method according to claim 1, wherein, The first device includes a user equipment (UE).

10. The method according to claim 1, wherein, The first device includes a base station.

11. A wireless communication method performed by a first device, comprising: Receiving a wake-up signal (WUS) indication via lower layer signaling; and Performing a power saving operation based on the received WUS indication, wherein performing the power saving operation includes: Suspending WUS monitoring based on the received WUS indication; and Maintaining a previously received WUS configuration during the suspension.

12. The method according to claim 11, wherein, The first device includes a user equipment (UE).

13. The method according to claim 11, wherein, The first device includes a base station.

14. The method according to claim 11, wherein, The wake-up signal indication includes an activation signal or a deactivation signal from physical layer (L1) signaling.

15. The method according to claim 11, wherein, The wake-up signal indication is within an extended control channel field.

16. The method according to claim 11, wherein, The wake-up signal indication is detected based on a scrambling code.

17. The method according to claim 11, wherein The wake-up signal indication is detected from a known signature within an existing control channel field.

18. The method according to claim 11, wherein, The wake-up signal indication includes an activation signal or a deactivation signal from media access control (MAC) layer signaling.

19. A device for wireless communication, comprising: A processor; A memory coupled to the processor; and Instructions stored in the memory and operable when executed by the processor to cause the device to: Suspend wake-up signal (WUS) monitoring for a specified period of time, for several cycles, or until a message for resuming monitoring is received upon instruction; Maintaining a previously received WUS configuration during the suspension; and Resuming wake-up signal monitoring after the specified period of time, after the several cycles, or after the message for resuming monitoring is received upon instruction, wherein the suspension occurs in response to an instruction for suspension received via lower layer signaling.

20. The device according to claim 19, wherein, The instructions further cause the device to request suspension for the specified period of time.

21. The device according to claim 19, wherein, The suspension occurs based on pre-agreed rules between a user equipment (UE) and a base station.

22. The device according to claim 19, wherein, The instruction for suspension is within an extended control channel field.

23. The device according to claim 19, wherein, The instruction for suspension is detected based on a scrambling code.

24. The device according to claim 19, wherein, The instruction for suspension is detected from a known signature within an existing control channel field.

25. The device according to claim 19, wherein, The instruction for suspension is detected from a Wake-up Signal (WUS) Medium Access Control - Control Element (MAC-CE).

26. The device according to claim 19, wherein, Suspension includes not monitoring for Wake-up Signal (WUS) opportunities for the WUS.

27. The device according to claim 19, wherein, The device includes a User Equipment (UE).

28. The device according to claim 19, wherein The device includes a base station.

29. A device for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and operative, when executed by the processor, to cause the device to: receive a Wake-up Signal (WUS) indication via lower layer signaling; and perform a power saving operation based on the received WUS indication, wherein performing the power saving operation includes: suspending WUS monitoring based on the received WUS indication; and maintaining a previously received WUS configuration during the suspension.

30. The apparatus according to claim 29, wherein, The device includes a User Equipment (UE).

31. The device according to claim 29, wherein, The device includes a base station.

32. The device according to claim 29, wherein, The Wake-up Signal indication includes an activation signal or a deactivation signal from Physical Layer (L1) signaling.

33. The device according to claim 29, wherein, The Wake-up Signal indication is within an Extended Control Channel field.

34. The device according to claim 29, wherein, The Wake-up Signal indication is detected based on a scrambling code.

35. The apparatus according to claim 29, wherein, The Wake-up Signal indication is detected from a known signature within an existing Control Channel field.

36. The device according to claim 29, wherein, The Wake-up Signal indication includes an activation signal or a deactivation signal from Media Access Control (MAC) layer signaling.

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