Keep-alive signal for network energy saving

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station can transmit a keep-alive signal indicating that a cell is in an energy saving mode. The base station can transmit a set of synchronization signal blocks (SSBs) based at least in part on the keep-alive signal. Numerous other aspects are described.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to the following: U.S. Provisional Patent Application No. 63 / 210,266, filed June 14, 2021, entitled “KEEP-ALIVE SIGNAL FOR NETWORK ENERGY SAVING”, which has been assigned to the assignee of this application; U.S. Provisional Patent Application No. 63 / 203,035, filed July 6, 2021, entitled “KEEP-ALIVE SIGNAL FOR NETWORK ENERGY SAVING”; and U.S. Non-Provisional Patent Application No. 17 / 455,320, filed November 17, 2021, entitled “KEEP-ALIVE SIGNAL FOR NETWORK ENERGY SAVING”, which are expressly incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communications, as well as technologies and apparatus for keep-alive signaling for network power saving. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems can utilize multiple access technologies that enable 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 / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that support communication for user equipment (UE) or multiple UEs. UEs may communicate with base stations via downlink and uplink communication. "Downlink" (or "DL") refers to the communication link from the base station to the UE, and "uplink" (or "UL") refers to the communication link from the UE to the base station.

[0006] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different UEs to communicate at the city, national, regional, and / or global levels. New Radio (NR), often referred to as 5G, is a collection of enhancements to the LTE mobile standard issued by 3GPP. NR aims to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integrating with other open standards using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM)) on the uplink, and supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technologies and carrier aggregation. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to grow. Summary of the Invention

[0007] Some aspects described herein relate to a base station for wireless communication. The base station may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit a keep-alive signal indicating the presence of a cell in an energy-saving mode. The one or more processors may be configured to transmit synchronization signal block (SSB) burst sets at least in part based on the keep-alive signal.

[0008] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive from a base station a keep-alive signal indicating the presence of a cell in power-saving mode. The one or more processors may be configured to receive SSB burst sets from the base station based at least in part on the keep-alive signal.

[0009] Some aspects described herein relate to a wireless communication method performed by a base station. The method may include transmitting a keep-alive signal indicating the presence of a cell in an energy-saving mode. The method may also include transmitting an SSB burst set based at least in part on the keep-alive signal.

[0010] Some aspects described herein relate to a wireless communication method performed by a UE. The method may include receiving from a base station a keep-alive signal indicating the presence of a cell in power-saving mode. The method may also include receiving an SSB burst set from the base station based at least in part on the keep-alive signal.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication performed by a base station. When executed by one or more processors of the base station, the set of instructions can cause the base station to send a keep-alive signal indicating the presence of a cell in power-saving mode. When executed by one or more processors of the base station, the set of instructions can cause the base station to send an SSB burst set at least in part based on the keep-alive signal.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions causes the UE to receive from a base station a keep-alive signal indicating the presence of a cell in power-saving mode. When executed by one or more processors of the UE, the set of instructions causes the UE to receive an SSB burst set from the base station at least in part based on the keep-alive signal.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include units for transmitting a keep-alive signal indicating the presence of a cell in an energy-saving mode. The apparatus may also include units for transmitting an SSB burst set based at least in part on the keep-alive signal.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include units for receiving from a base station a keep-alive signal indicating the presence of a cell in power-saving mode. The apparatus may also include units for receiving SSB burst sets from the base station based at least in part on the keep-alive signal.

[0015] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems, as fully described herein with reference to the accompanying drawings and description, and as shown in the accompanying drawings and description.

[0016] The features and technical advantages of examples according to this disclosure have been outlined rather broadly above to provide a better understanding of the following specific embodiments. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifications or the design of other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not as a limitation of the definitions in the claims.

[0017] While aspects are described in this disclosure by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-modular components (e.g., end-user equipment, vehicles, communication equipment, computing devices, industrial equipment, retail / procurement equipment, medical devices, and / or artificial intelligence devices). Aspects can be implemented as chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for the claimed and described implementations and practices. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aspects described herein are intended to be practiced in devices, components, systems, distributed arrangements, and / or end-user equipment of various sizes, shapes, and configurations. Attached Figure Description

[0018] To gain a more detailed understanding of the features of this disclosure, a more specific description of the content briefly outlined above can be obtained by referring to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered as limiting its scope, as the specification may allow for other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 This is a schematic diagram illustrating an example of a wireless network according to this disclosure.

[0020] Figure 2 This is a schematic diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 This is a schematic diagram illustrating an example of a synchronization signal (SS) hierarchy according to this disclosure.

[0022] Figure 4-7 This is a schematic diagram illustrating an example of keep-alive signaling associated with network power saving according to this disclosure.

[0023] Figure 8-9 This is a schematic diagram illustrating an example processing associated with keep-alive signaling for network energy saving in accordance with the present disclosure.

[0024] Figure 10-11 This is a schematic diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0025] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as being limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey to those skilled in the art the scope of protection of this disclosure. It will be understood by those skilled in the art that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or to practice a method. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using structures, functions, or structures and functions other than or different from the aspects of the disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0026] Several aspects of a telecommunications system will now be presented with reference to various devices and techniques. These devices and methods will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] While the terms commonly associated with 5G or New Radio (NR) Radio Access Technology (RAT) may be used to describe the aspects herein, the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0028] Figure 1This is a schematic diagram illustrating an example of a wireless network 100 according to this disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, etc. The wireless network 100 may include one or more base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. Base station 110 is the entity that communicates with UE 120. Base station 110 (sometimes referred to as BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a Transmit / Receive Point (TRP). Each base station 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), the term “cell” can refer to the coverage area of ​​base station 110 and / or the base station subsystem serving that coverage area, depending on the context in which the term is used.

[0029] Base station 110 can provide communication coverage for macro cells, pico cells, femtocells, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UE 120 with a service subscription. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UE 120 associated with that femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Base station 110 for macro cells can be referred to as a macro base station. Base station 110 for pico cells can be referred to as a pico base station. Base station 110 for femtocells can be referred to as a femtocell or a home base station. Figure 1 In the example shown, BS110a can be a macro base station for macro cell 102a, BS110b can be a pico base station for pico cell 102b, and BS110c can be a femto base station for femto cell 102c. A base station can support one or more (e.g., three) cells.

[0030] In some examples, the cell may not be stationary, and the geographical area of ​​the cell may be movable depending on the location of the mobile base station 110 (e.g., a mobile base station). In some examples, base stations 110 may be interconnected with each other and / or with one or more other base stations 110 or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0031] Wireless network 100 may include one or more relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., base station 110 or UE 120) and transmit the data transmissions to a downstream station (e.g., UE 120 or base station 110). A relay station may be a UE 120 capable of relaying transmissions for other UE 120s. Figure 1 In the example shown, BS110d (e.g., a relay base station) can communicate with BS110a (e.g., a macro base station) and UE 120d to facilitate communication between BS110a and UE 120d. The base station 110 for relay communication can be referred to as a relay station, relay base station, repeater, etc.

[0032] Wireless network 100 can be a heterogeneous network comprising different types of base stations 110 (such as macro base stations, pico base stations, femto base stations, relay base stations, etc.). These different types of base stations 110 can have different transmit power levels, different coverage areas, and / or different effects on interference in wireless network 100. For example, macro base stations can have high transmit power levels (e.g., 5 to 40 watts), while pico base stations, femto base stations, and relay base stations can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0033] Network controller 130 may be coupled to or communicate with a set of base stations 110, and may provide coordination and control for these base stations 110. Network controller 130 may communicate with base stations 110 via backhaul communication links. Base stations 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links.

[0034] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be fixed or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), 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, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio unit), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, and / or any other suitable device configured to communicate via a wireless medium.

[0035] Some UEs 120 can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 can be considered Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs 120 can be considered customer premises equipment. UEs 120 may be included within a housing that houses the components of the UE 120 (e.g., processor components and / or memory components). In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0036] Typically, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT can be referred to as a radio technology, air interface, etc. A frequency can be referred to as a carrier, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0037] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). 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, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described herein as being performed by base station 110.

[0038] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., by frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands were identified as the frequency range names FR1 (410MHz–7.125GHz) and FR2 (24.25GHz–52.6GHz). It should be understood that although a portion of FR1 is greater than 6GHz, FR1 is often referred to (interchangeably) as the “Sub-6GHz” band in various documents and articles. Similar naming issues sometimes arise with FR2; although it differs from the Extremely High Frequency (EHF) band (30GHz–300GHz), FR2 is generally referred to (interchangeably) as the “millimeter wave” band in documents and articles, while EHF is recognized as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0039] Frequencies between FR1 and FR2 are generally referred to as intermediate frequency (IF) bands. Recent 5G NR studies have designated the operating bands of these IF bands as the frequency range name FR3 (7.125GHz-24.25GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, and therefore can effectively extend the features of FR1 and / or FR2 to IF band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation above 52.6GHz. For example, three higher operating frequency bands have been identified as the frequency range names FR4a or FR4-1 (52.6GHz–71GHz), FR4 (52.6GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands belongs to the EHF band.

[0040] Considering the examples above, unless otherwise specifically stated, it should be understood that the term "sub-6GHz," as used herein, can broadly refer to frequencies that can be less than 6GHz, can be within FR1, or can include intermediate frequency band frequencies. Furthermore, unless otherwise specifically stated, it should be understood that the term "millimeter wave," as used herein, can broadly refer to frequencies that can include intermediate frequency band frequencies, can be within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or can be within the EHF band. It is anticipated that frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0041] In some aspects, UE 120 may include communication manager 140. As described in more detail elsewhere herein, communication manager 140 may receive keep-alive signals from the base station indicating the presence of a cell in power-saving mode; and receive synchronization signal block (SSB) burst sets from the base station at least in part based on the keep-alive signals. Additionally or alternatively, communication manager 140 may perform one or more other operations described herein.

[0042] In some aspects, base station 110 may include communication manager 150. As described in more detail elsewhere herein, communication manager 150 may transmit keep-alive signals indicating the presence of cells in power-saving mode; and transmit SSB burst sets at least in part based on the keep-alive signals. Additionally or alternatively, communication manager 150 may perform one or more other operations described herein.

[0043] As pointed out above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0044] Figure 2 This is a schematic diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1).

[0045] At base station 110, transmitting processor 220 can receive data from data source 212 intended for use with UE 120 (or a set of UEs 120). Transmitting processor 220 can select one or more modulation and decoding schemes (MCS) for UE 120 based at least in part on one or more Channel Quality Indicators (CQIs) received from UE 120. Base station 110 can process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for UE 120, and can provide data symbols for UE 120. Transmitting processor 220 can process system information (e.g., for Semi-Static Resource Partitioning Information (SRPI)) and control information (e.g., CQI requests, permission, and / or upper-layer signaling) and provide overhead symbols and control symbols. Transmitting processor 220 can generate reference symbols for reference signals (e.g., Cell-Specific Reference Signal (CRS) or Demodulation Reference Signal (DMRS)) and synchronization signals (e.g., Primary Synchronization Signal (PSS) or Secondary Synchronization Signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide a set of output symbol streams (e.g., T output symbol streams) to a set of corresponding modems 232 (e.g., T modems), shown as modems 232a to 232t. For example, each output symbol stream can be provided to a modulator component (shown as MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can also use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a set of corresponding antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0046] At UE 120, an array of antennas 252 (shown as antennas 252a to 252r) can receive downlink signals from base station 110 and / or other base stations 110, and can provide a set of received signals (e.g., R received signals) to an array of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the demodulator component to further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from modem 254, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. The receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data from the UE 120 to the data sink 260, and provide decoding control information and system information to the controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine Reference Signal Received Power (RSRP) parameters, Received Signal Strength Indicator (RSSI) parameters, Reference Signal Received Quality (RSRQ) parameters, and / or CQI parameters, among other examples. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0047] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0048] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or can be included in: one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, and other examples. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), coplanar antenna element sets, non-coplanar antenna element sets, and / or coupled to one or more transmitting and / or receiving components (such as…) Figure 2 One or more antenna elements (one or more components).

[0049] On the uplink, at UE 120, transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). Transmit processor 264 can generate reference symbols for one or more reference signals. Symbols from transmit processor 264 can be pre-encoded (if applicable) by TX MIMO processor 266, further processed by modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some examples, modem 254 of UE 120 may include modulator and demodulator. In some examples, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The processor (e.g., controller / processor 280) and memory 282 can use a transceiver to perform aspects of any of the methods described herein (e.g., references). Figures 4-9 ).

[0050] At base station 110, uplink signals from UE 120 and / or other UEs can be received by antenna 234, processed by modem 232 (e.g., a demodulator component of modem 232, shown as DEMOD), detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and can communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of base station 110 may include modulator and demodulator. In some examples, base station 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The processor (e.g., controller / processor 240) and memory 242 may be used to perform aspects of any of the methods described herein (e.g., references...). Figures 4-9 ).

[0051] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2Any other components may execute one or more techniques associated with keep-alive signaling for network power saving, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can perform or direct, for example Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. In some examples, the execution instructions may include: run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0052] In some aspects, base station 110 includes units for transmitting a keep-alive signal indicating the presence of a cell in power-saving mode; and / or units for transmitting SSB burst sets at least in part based on the keep-alive signal. Units for base station 110 to perform the operations described herein may include, for example, one or more of a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0053] In some aspects, UE 120 includes elements for receiving from a base station a keep-alive signal indicating the presence of a cell in power-saving mode; and / or elements for receiving SSB burst sets from the base station at least in part based on the keep-alive signal. Elements for UE 120 to perform the operations described herein may include, for example, one or more of a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0054] Although Figure 2The blocks are shown as different components, but the functions described above with respect to the blocks can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be executed by the controller / processor 280 or under the control of the controller / processor 280.

[0055] As mentioned above, providing Figure 2 As an example. Other examples may differ from those regarding... Figure 2 The example described.

[0056] Figure 3 This is a schematic diagram illustrating example 300 of a synchronization signal (SS) hierarchy according to this disclosure. Figure 3 As shown, the SS layer may include SSB burst sets 305. As further shown, each SSB burst set 305 may include one or more SSBs 315 (shown as SSB 0 to SSB M-1), where M is the maximum number of SSBs 315 that the SSB burst set 305 can carry. In some aspects, different SSBs 315 may be beamformed in different ways (e.g., transmitted using different beams) and may be used for cell search, cell acquisition, beam management and / or beam selection (e.g., as part of the initial network access procedure). SSB burst sets 305 may be transmitted periodically (e.g., every X milliseconds) by a radio node (e.g., base station 110), such as... Figure 3 As shown. For example, SSB burst set 305 can have a period of 20 ms for initial cell search. In some examples, SSB burst set 305 can have a fixed or dynamic duration (in... Figure 3 The duration Y ms is represented as Y milliseconds. For example, according to the 3GPP specification, the duration Y ms of SSB burst set 305 is limited to a 5ms window. In some cases, SS burst set 305 may be referred to as the Discovery Reference Signal (DRS) transmission window or the SSB Measurement Time Configuration (SMTC) window.

[0057] In some examples, SSB 315 may include resources carrying PSS 320, SSS 325, and / or Physical Broadcast Channel (PBCH) 330. In some examples, multiple SSBs 315 are included in SSB burst set 305 (e.g., transmissions on different beams), and PSS 320, SSS 325, and / or PBCH 330 may be identical for each SSB 315 across SSB burst set 305. In some examples, a single SSB 315 may be included in SSB burst set 305. In some examples, SSB 315 may be at least four symbols in length (e.g., OFDM symbols), where each symbol carries one or more of PSS 320 (e.g., occupying one symbol), SSS 325 (e.g., occupying one symbol), and / or PBCH 330 (e.g., occupying two symbols). For example, in some cases, the first symbol of SSB 315 may carry PSS 320, the second symbol of SSB 315 may carry PBCH 330, the third signal of SSB 315 may carry SSS 325 and PBCH 330, and the fourth signal of SSB 315 may carry PBCH 330. PSS 320 and SSS 325 may carry Physical Cell Identifier (PCI). For example, in 5G / NR, there may be 1008 possible PCI values. In some examples, PSS 320 may carry a sequence selected from three different sequences corresponding to three different groups of 336 PCI values ​​(e.g., an m-sequence of length 127). In some examples, SSS 325 may carry a sequence selected from 336 different sequences corresponding to different PCI values. PBCH may carry a Master Information Block (MIB), which provides system information for initial access (e.g., how to receive Remaining Minimum System Information (RMSI)) and timing information including the SSB index. In some respects, SSB 315 may be referred to as an SS / PBCH block.

[0058] In some respects, the notation for SSB 315 is consecutive, such as... Figure 3 As shown. In some aspects, the symbols of SSB 315 are discontinuous. Similarly, in some aspects, one or more SSB 315s of SSB burst set 305 may be transmitted in continuous radio resources (e.g., continuous symbols) during one or more time slots. Alternatively or additionally, one or more SSB 315s of SSB burst set 305 may be transmitted in discontinuous radio resources.

[0059] In some aspects, the SSB burst set 305 may have a burst period, and the SSB 315 of the SSB burst set 305 may be transmitted by a radio node (e.g., base station 110) according to the burst period. In some examples, the SSB burst set 305 may include multiple repetitions of the SSB burst within its period.

[0060] In some aspects, SSB 315 may include an SSB index, which may correspond to the beam used to carry SSB 315. UE 120 may monitor and / or measure SSB 315 using different receive (Rx) beams during the initial network access procedure and / or cell search procedure, and other examples. Based at least in part on monitoring and / or measurement, UE 120 may indicate one or more SSBs 315 with optimal signal parameters (e.g., RSRP parameters) to base station 110. Base station 110 and UE 120 may use the indicated one or more SSBs 315 to select one or more beams to be used for communication between base station 110 and UE 120 (e.g., for a random access channel (RACH) procedure). Alternatively or additionally, UE 120 may use SSB 315 and / or the SSB index to determine cell timing for the cell (e.g., serving cell) through which it receives SSB 315.

[0061] As mentioned above, providing Figure 3 As an example. Other examples may differ from those regarding... Figure 3 The example described.

[0062] Energy conservation in a wireless network is desired, for example, by reducing the power consumption of network nodes (e.g., base stations and / or cells). In some cases, cells not serving any UEs can enter a power-saving mode. In some examples, when a cell is in power-saving mode, the base station associated with that cell may send SSBs and only monitor the RACH for cell discovery purposes. This can lead to unnecessary network energy consumption due to the transmission of SSBs with shorter periods than required in power-saving mode. In some examples, a cell in power-saving mode can be shut down, causing the base station associated with that cell to stop sending SSBs for the cell. In this case, the base station associated with the cell in power-saving mode may require wake-up signaling from a central network entity to resume sending SSBs for the cell. This can result in reduced network energy consumption compared to sending SSBs and monitoring the RACH for cell discovery purposes, but can lead to increased connection latency when a UE discovers and attempts to connect to the cell.

[0063] Some of the techniques and apparatus described herein enable a base station to transmit a keep-alive signal indicating the presence of a cell in power-saving mode, and to transmit SSB burst sets at least in part based on the keep-alive signal. A UE can receive the keep-alive signal and receive the SSB burst sets at least in part based on the keep-alive signal. In some aspects, the base station can utilize the periodicity of the keep-alive signal to transmit the SSB burst sets, and the UE can monitor one or more candidate times for the SSB burst sets determined at least in part based on the periodicity of the keep-alive signal. In some aspects, the UE can transmit an uplink trigger signal to the base station at least in part based on receiving the keep-alive signal, and the base station can transmit the SSB burst sets at least in part based on receiving the uplink trigger signal from the UE. As a result, the base station can reduce SSB transmissions, leading to reduced power consumption and reduced connection latency compared to shutting down the cell and requiring wake-up signaling from a central network entity. Therefore, the techniques and apparatus described herein can result in a trade-off between improvements in network power saving and connection latency for cells in power-saving mode.

[0064] Figure 4 This is a schematic diagram illustrating example 400 associated with keep-alive signaling for network energy saving according to this disclosure. Figure 4 As shown, Example 400 includes communication between base station 110 and UE 120. In some aspects, base station 110 and UE 120 may be included in a wireless network (e.g., wireless network 100). Base station 110 and UE 120 may communicate via a wireless access link (which may include an uplink and a downlink).

[0065] like Figure 4 As shown by reference numeral 405, base station 110 can transmit a keep-alive signal indicating the presence of a cell in energy-saving mode. When a cell associated with base station 110 is in energy-saving mode, base station 110 can periodically broadcast the keep-alive signal. In some aspects, base station 110 can begin transmitting the keep-alive signal at least in part based on switching the cell associated with base station 110 to energy-saving mode. In some aspects, base station 110 can switch the cell to energy-saving mode in conjunction with determining that the number of UEs served by the cell does not meet a threshold. For example, in some aspects, base station 110 can switch the cell to energy-saving mode in conjunction with a determination that there are no UEs served by the cell. A cell in energy-saving mode may be referred to as an "energy-saving cell".

[0066] The keep-alive signal can be a periodic signal indicating the presence of an energy-saving cell. In some aspects, the keep-alive signal can include one or more generated sequences configured to indicate the presence of a cell in energy-saving mode. In some aspects, base station 110 can select a generated sequence for the keep-alive signal from a set of candidate generated sequences configured to indicate the presence of a cell in energy-saving mode. A generated sequence is a sequence (e.g., an m-sequence, a Zadoff-Chu sequence, or a gold sequence) used to generate a signal such as the keep-alive signal. For transmitting the keep-alive signal, base station 110 can map the generated sequence for the keep-alive signal to multiple subcarriers corresponding to the length of the generated sequence.

[0067] In some aspects, one or more candidate generation sequences can be defined for the keep-alive signal (e.g., according to a wireless communication standard). In this case, base station 110 and UE 120 can store one or more candidate generation sequences defined for the keep-alive signal. In some aspects, one or more candidate generation sequences for the keep-alive signal can be configured via broadcast from another cell that is not in power-saving mode (e.g., associated with another base station). For example, an always-on cell or a compensation cell can broadcast one or more candidate generation sequences for the keep-alive signal (and / or other parameters for the keep-alive signal) to all cells in power-saving mode within a geographic area. In some aspects, the number of candidate generation sequences for the keep-alive signal can be much smaller than the number of possible PCIs (e.g., 1008) carried by the PSS / SSS in the SSB.

[0068] The keep-alive signal can be characterized by the periodicity (e.g., keep-alive periodicity), duration, and one or more generation sequences used to generate the keep-alive signal. In some aspects, the periodicity and / or duration can be defined for the keep-alive signal (e.g., according to a wireless communication standard) and stored by base station 110 and UE 120. In some aspects, the periodicity and / or duration for the keep-alive signal can be configured by another cell that is not in power-saving mode (e.g., associated with another base station). The periodicity associated with the keep-alive signal can be the time interval between periodic transmissions of the keep-alive signal by base station 110. The duration of the keep-alive signal can span one or more consecutive symbols. In some aspects, the duration of the keep-alive signal can span multiple consecutive symbols, and base station 110 can perform beam scanning by transmitting the keep-alive signal in different beam directions in different symbols of multiple consecutive symbols. For example, base station 110 can transmit the keep-alive signal in a first symbol on a first beam, in a second symbol on a second beam, and so on.

[0069] In some aspects, the duration of the keep-alive signal can span multiple consecutive symbols, and the keep-alive signal can include the same generation sequence for each of the multiple consecutive symbols. In this case, UE 120 can acquire and use only the symbol boundaries for determining timing (e.g., for monitoring the SSB set and / or transmitting uplink trigger signals, as described elsewhere herein). In some aspects, the duration of the keep-alive signal can span multiple consecutive symbols, and the keep-alive signal can include different generation sequences in different symbols of the multiple consecutive symbols. In this case, a mapping can be defined between the generation sequences and symbols within a time slot (e.g., in a wireless communication standard). For example, the keep-alive signal can include a first generation sequence mapped to a first symbol, a second generation sequence mapped to a second symbol, etc. In some aspects, UE 120 can determine the symbol index based on the generation sequence received by UE 120, and based at least in part on the symbol index, UE 120 can acquire and utilize time slot boundaries for timing (e.g., for monitoring the SSB set and / or transmitting uplink trigger signals, as described elsewhere herein).

[0070] In some aspects, keep-alive signals can be associated with a cell group that includes one or more energy-efficient cells. In this case, different cell groups can be distinguished by keep-alive signals having different generation sequences and / or different time offsets where the keep-alive signal is scheduled. For example, at least one of the generation sequence or time offset for the keep-alive signal transmitted by base station 110 can be based at least in part on a cell group associated with one or more cells that include the cells associated with base station 110.

[0071] UE 120 may receive keep-alive signals transmitted by base station 110. For example, UE 120 may detect and receive one or more periodic broadcasts of keep-alive signals from base station 110. UE 120 may determine that a cell associated with base station 110 is in power-saving mode based at least in part on receiving keep-alive signals (e.g., at least in part on receiving keep-alive signals including a generated sequence associated with an indication of a cell in power-saving mode).

[0072] like Figure 4 As further illustrated by reference numeral 410 in the accompanying drawings, in some aspects, UE 120 may determine candidate timings for SSB burst sets at least in part based on keep-alive signals received from base station 110. In some aspects, base station 110 may periodically transmit SSB burst sets using periodicity based at least in part on the periodicity of the keep-alive signals. In this case, UE 120, in conjunction with keep-alive signals received from base station 110, may determine one or more candidate timings for SSB burst sets and monitor these candidate timings to attempt to receive the SSB burst sets.

[0073] In some respects, the periodicity of the SSB burst set can be an integer multiple of the periodicity of the keep-alive signal. For example, base station 110 can transmit an SSB burst set with the following SSB periodicity: SSB periodicity = ScalingFactorSSB * keep-alive periodicity, where ScalingFactorSSB is an integer scaling factor and keep-alive periodicity is the periodicity of the keep-alive signal. Therefore, base station 110 can transmit an SSB burst set once for every N transmissions of the keep-alive signal, where N is equal to the integer scaling factor (ScalingFactorSSB). Base station 110 can also transmit an SSB burst set with at least a minimum time offset (minOffsetToSSB) between the keep-alive signal (e.g., the most recent keep-alive signal transmission to the SSB burst set) and the SSB burst set.

[0074] In some aspects, the scaling factor (ScalingFactorSSB) and the minimum time offset (minOffsetToSSB) can be parameters associated with the keep-alive signal. For example, the scaling factor (ScalingFactorSSB) and minimum time offset (minOffsetToSSB) parameters for the keep-alive signal can be predefined (e.g., in wireless communication standards) or configured and broadcast by another cell not in power-saving mode (e.g., by a base station associated with another cell). Upon receiving the keep-alive signal, UE 120 can at least determine the symbol boundary associated with the keep-alive signal received by UE 120, and UE 120 can determine one or more candidate timings (e.g., candidate positions in the time domain) for the SSB burst set at the corresponding offset of the symbol boundary associated with the keep-alive signal. In some aspects, UE 120 can determine the corresponding offset of one or more candidate timings for the SSB burst set based at least in part on the periodicity associated with the keep-alive signal (keep-alive periodicity), the scaling factor (ScalingFactorSSB), and the minimum time offset (minOffsetToSSB). For example, UE 120 can calculate the corresponding offset (offsetToSSB) for one or more candidate timings as: offsetToSSB = i * keep-alive periodicity + minOffsetToSSB, i = 0, 1, 2, ..., ScalingFactorSSB-1. In some aspects, UE 120 can determine the slot boundaries associated with the keep-alive signal based at least in part on the symbol index associated with the symbol-specific generation sequence included in the keep-alive signal received by UE 120. In this case, UE 120 can apply the offset for candidate timings for the SSB burst set from the slot boundaries associated with the keep-alive signal. UE 120 can monitor one or more candidate timings associated with the offset determined by UE 120. In some aspects, UE 120 can perform Rx beam search over multiple periodic transmissions of the keep-alive signal to select the Rx beam for monitoring candidate timings and receiving the SSB burst set.

[0075] like Figure 4Furthermore, as shown by reference numeral 415, in some aspects, UE 120 may send an uplink trigger signal to base station 110 at least in part based on receiving a keep-alive signal. In some aspects, instead of (or in addition to) base station 110 periodically sending SSB burst sets for cells in power-saving mode, base station 110 may be triggered to send an SSB burst set via an uplink trigger signal sent by UE 120 in conjunction with UE 120 receiving a keep-alive signal. In some aspects, UE 120 may send an uplink trigger signal instead of determining the candidate timing for periodically sent SSB burst sets (as described in conjunction with reference numeral 410).

[0076] In some aspects, a single sequence (e.g., a generation sequence) can be defined for the uplink trigger signal to trigger SSB burst transmission (e.g., in wireless communication standards). In other aspects, multiple sequences can be defined for the uplink trigger signal. In this case, UE 120 can randomly select the sequence to transmit the uplink trigger signal from the multiple sequences defined for the uplink trigger signal. The uplink trigger signal can be much simpler than the physical RACH (PRACH) preamble used to initiate the RACH initial access procedure. For example, the number of sequences defined for the uplink trigger signal can be less than the number of possible sequences defined for PRACH preamble transmission (e.g., 64). Because the uplink trigger signal is transmitted by UE 120 when the cell is in power-saving mode, there may be no other UEs or very few other UEs within the cell's coverage area when UE 120 transmits the uplink trigger signal. Therefore, the number of sequences defined for the uplink trigger signal can be much smaller than the number of possible sequences for the PRACH preamble.

[0077] UE 120 can transmit an uplink trigger signal at a time offset (offsetToULTriggering) relative to the received keep-alive signal. For example, UE 120 can apply the time offset (offsetToULTriggering) associated with the uplink trigger signal from either a symbol boundary associated with the keep-alive signal received by UE 120 or a timeslot boundary associated with the keep-alive signal received by UE 120. Base station 110 can monitor resources after the keep-alive signal transmission for the uplink trigger signal from UE 120. In some aspects, after each transmission of the keep-alive signal, base station 110 can monitor the uplink trigger signal timing offset from the keep-alive signal by the time offset (offsetToULTriggering) associated with the uplink trigger signal. For example, the start symbol of each uplink trigger signal timing can be offset by the time offset (offsetToULTriggering) from the start symbol of the corresponding keep-alive signal, and the duration of each uplink trigger signal timing can be equal to the duration of the keep-alive signal. In some aspects, the offsetToULTriggering associated with uplink triggering can be predefined (e.g., in wireless communication standards) or configured and broadcast by another cell not in power-saving mode (e.g., by a base station associated with another cell). When UE 120 sends an uplink trigger signal to base station 110, base station 110 can receive the uplink trigger signal at least in part based on monitoring the timing of the uplink trigger signal in which UE 120 sends the uplink trigger signal.

[0078] As described above, base station 110 can transmit keep-alive signals on multiple beams. For example, base station 110 can transmit keep-alive signals on different beams (e.g., in different beam directions) on different symbols of the keep-alive signal duration. In some aspects, one or more corresponding resources for the uplink trigger signal can be associated with each of the multiple beams on which the keep-alive signal is transmitted. For example, the one or more corresponding resources associated with a beam may include one or more time resources for transmitting the uplink trigger signal, one or more frequency resources for transmitting the uplink trigger signal, and / or one or more code or sequence resources for transmitting the uplink trigger signal. In some aspects, UE 120 can transmit the uplink trigger signal in resources associated with the beam on which UE 120 receives the keep-alive signal (e.g., resources in one or more corresponding resources associated with that beam). For example, base station 110 can use different generation sequences for the keep-alive signal in different symbols (e.g., on different beams), and UE 120 can determine the symbol index based on the generation sequence received by UE 120. In this scenario, UE 120 can determine the resources (e.g., time resources, frequency resources, and / or code or sequence resources) for transmitting uplink trigger signals, at least in part, based on the symbol index.

[0079] In some aspects, UE 120 may transmit an uplink trigger signal in time resources associated with the beam on which UE 120 receives a keep-alive signal. For example, UE 120 may apply a time offset (offsetToULTriggering) relative to the received keep-alive signal, which may cause UE 120 to transmit the uplink trigger signal at the time resources (e.g., symbols or time slots) associated with the beam on which UE 120 receives a keep-alive signal. In some aspects, UE 120 may transmit an uplink trigger signal in frequency resources associated with the beam on which UE 120 receives a keep-alive signal. For example, each symbol index may be mapped to one or more frequency resources, and UE 120 may use the frequency resources associated with the symbol index determined for the keep-alive signal to transmit the uplink trigger signal. In some aspects, UE 120 may transmit an uplink trigger signal in code or sequence resources associated with the beam on which UE 120 receives a keep-alive signal. "Code or sequence resource" refers to a code or sequence (e.g., a generation sequence) that can be used to transmit an uplink trigger signal. For example, multiple possible sequences can be defined for an uplink trigger signal, where different sequences are associated with different beams (e.g., with different symbol indices). In this case, UE 120 can select the generation sequence for transmitting the uplink trigger signal based at least in part on the beam on which the keep-alive signal is received (e.g., at least in part on the symbol index determined for the keep-alive signal).

[0080] In some aspects, base station 110 may form a receive beam for receiving uplink trigger signals based at least in part on the association between different beams on which keep-alive signals are transmitted and corresponding one or more resources on which base station 110 may receive uplink trigger signals. For example, for each beam used to transmit keep-alive signals, base station 110 may use a receive beam corresponding to that beam (e.g., a receive beam having the same beam direction as the transmit beam used to transmit keep-alive signals) to monitor one or more resources associated with that beam (e.g., during uplink trigger signal monitoring).

[0081] like Figure 4Furthermore, as shown by reference numeral 420, base station 110 can transmit SSB burst sets at least partially based on keep-alive signals. UE 120 can receive the SSB burst sets transmitted by base station 110. In some aspects, based at least partially on receiving the SSB burst sets, UE 120 can transmit PRACH preambles to base station 110 at a RACH timing associated with the SSB in the SSB burst set to initiate a RACH procedure for initial access to the cell associated with base station 110. In some aspects, after transmitting the SSB burst sets, base station 110 can monitor the RACH timing associated with the SSB in the SSB burst set and can receive PRACH preamble transmissions from UE 120 at the RACH timing.

[0082] In some aspects, base station 110 may periodically transmit SSB burst sets using a periodicity at least partially based on the periodicity of the keep-alive signal. In this case, the periodic SSB burst set transmission by base station 110 is not triggered by receiving an uplink trigger signal from UE 120. For example, base station 110 may periodically transmit SSB burst sets for cells in power-saving mode without receiving any indication that UE 120 or any other UE has detected or received a keep-alive signal. In some aspects, the periodicity of the SSB burst set may be an integer multiple of the periodicity of the keep-alive signal. For example, base station 110 may transmit SSB burst sets with an SSB periodicity of: SSB periodicity = ScalingFactorSSB * keep-alive periodicity. Base station 110 may also transmit SSB burst sets with at least a minimum time offset (minOffsetToSSB) between the keep-alive signal (e.g., the most recent keep-alive signal transmission to the SSB burst set). In some aspects, where base station 110 periodically transmits SSB burst sets for cells in power-saving mode, UE 120 can monitor one or more candidate times for the SSB burst sets and receive the SSB burst sets in one of the monitored times. In this case, the candidate times for the SSB burst sets can be determined as described above in conjunction with reference to reference numeral 410. In some aspects, UE 120 can receive SSBs on an Rx beam, which is selected at least in part based on an Rx beam search performed by UE 120 over multiple periodic transmissions of keep-alive signals.

[0083] In some aspects, base station 110 may transmit SSB burst sets in conjunction with receiving an uplink trigger signal from UE 120. In some aspects, for cells in power-saving mode, base station 110 may transmit only SSB burst sets (and perform subsequent monitoring for PRACH preamble transmission) in conjunction with receiving an uplink trigger signal from UE 120. Alternatively, in some aspects, in addition to periodic SSB burst set transmissions performed by base station 110, base station 110 may also transmit SSB burst sets in conjunction with receiving an uplink trigger signal. In some aspects, after each keep-alive signal transmission, base station 110 may monitor the corresponding uplink trigger signal timing offset from the keep-alive signal by the time offset (offsetToULTriggering) associated with the uplink trigger signal. UE 120 may transmit the uplink trigger signal as described above in conjunction with reference to reference numeral 415, and base station 110 may receive the uplink trigger signal at one of the uplink trigger signal timings. Then, base station 110 can send SSB burst sets at least in part based on receiving an uplink trigger signal from UE 120.

[0084] When base station 110 transmits an SSB burst set in conjunction with receiving an uplink trigger signal, the time offset (offsetToSSB) associated with the SSB burst set can be defined relative to either the keep-alive signal or the uplink trigger signal. For example, in some aspects, base station 110 may transmit the SSB burst set in conjunction with receiving the uplink trigger signal at a time offset (offsetToSSB) relative to the time offset (offsetToSSB) of transmitting the keep-alive signal. In some aspects, after transmitting the uplink trigger signal, UE 120 may monitor the timing of the SSB burst set and receive the SSB burst set transmitted by base station 110 based at least in part on monitoring the timing of the SSB burst set. For example, the timing of the SSB burst set may be offset from the time offset (offsetToSSB) of the keep-alive signal, or offset from the time offset (offsetToSSB) of the uplink trigger signal. In some aspects, the offset (offsetToSSB) associated with the SSB burst set can be predefined (e.g., in wireless communication standards) or configured and broadcast by another cell that is not in power-saving mode (e.g., by a base station associated with another cell).

[0085] As described above, in some aspects, UE 120 may transmit an uplink trigger signal in resources (e.g., time resources, frequency resources, and / or code or sequence resources) associated with the beam on which UE 120 receives a keep-alive signal (e.g., multiple beams transmitted by base station 110). In this case, the SSB transmitted by base station 110 may be at least partially based on the resources (e.g., time resources, frequency resources, and / or code or sequence resources) on which base station 110 receives the uplink trigger signal. For example, base station 110 may determine the SSB periodicity, the offset of the SSB burst set (e.g., offsetToSSB), and / or select which SSBs are in the SSB burst set from a possible set of SSBs (e.g., 64 possible SSBs in FR2) based at least partially on the resources on which the uplink trigger signal is received.

[0086] In some aspects, the MIB included in an SSB at least partially based on a keep-alive signal (e.g., at least partially based on an SSB burst set sent upon receiving an uplink trigger signal) may include some information (e.g., a first information set) that is different from the information (e.g., a second information set) included in the MIB of other SSBs (e.g., SSBs not at least partially based on the keep-alive signal's SSB burst set). For example, some information (such as indications of which SSBs were sent and SSB indices) may be conveyed in the keep-alive signal. In this case, bit fields in the MIB used to convey information already conveyed in the keep-alive signal in the SSB associated with the keep-alive signal (e.g., based at least partially on an SSB sent upon receiving an uplink trigger signal) may be reinterpreted or reused to convey other information to the UE 120. For example, bit fields in the MIB for information already transmitted in the keep-alive signal may be used to convey information such as power-saving parameters, the time to exit the current power-saving mode, and / or a new set of access parameters for an idle UE. In this case, to avoid confusion for UEs that may not interpret the information correctly, the SSBs in the SSB burst set associated with the keep-alive signal (e.g., based at least in part on the SSB burst set sent upon receiving the uplink trigger signal) can be non-cell-defined SSBs or non-grid SSBs.

[0087] As described above, base station 110 can transmit a keep-alive signal indicating the presence of a cell in power-saving mode, and base station 110 can transmit SSB burst sets at least partially based on the keep-alive signal. UE 120 can receive the keep-alive signal and receive the SSB burst sets at least partially based on the keep-alive signal. In some aspects, base station 110 can transmit SSB burst sets using a periodicity at least partially based on the periodicity of the keep-alive signal, and UE 120 can monitor one or more candidate times for SSB burst sets determined at least partially based on the periodicity of the keep-alive signal. In some aspects, UE 120 can transmit an uplink trigger signal to base station 110 at least partially based on receiving the keep-alive signal, and base station 110 can transmit SSB burst sets at least partially based on receiving the uplink trigger signal from UE 120. As a result, base station 110 can reduce SSB transmissions for cells in power-saving mode, leading to reduced power consumption and reduced connection latency compared to shutting down the cell and requiring wake-up signaling from a central network entity. Therefore, the techniques and apparatus described herein can lead to a trade-off between improvements in network energy efficiency and connection latency for cells in energy-saving modes.

[0088] As mentioned above, providing Figure 4 As an example. Other examples may differ from those regarding... Figure 4 The example described.

[0089] Figure 5 This is a schematic diagram illustrating example 500 associated with keep-alive signaling for network energy conservation according to this disclosure. Figure 5 As shown, Example 500 includes keep-alive signals associated with different cell groups. (As described above...) Figure 4 As described, in some aspects, keep-alive signals can be associated with a group of cells that includes one or more energy-efficient cells. For example, different groups of cells can be distinguished by keep-alive signals having different generation sequences and / or different time offsets where the keep-alive signals are scheduled.

[0090] like Figure 5As indicated by reference numeral 505, the keep-alive signal associated with the first cell group (“Cell Group 1”) may include a first generation sequence (“Sequence 1”). For example, Cell Group 1 may include one or more cells in power-saving mode, and base stations associated with cells in Cell Group 1 may transmit the keep-alive signal associated with Cell Group 1. As indicated by reference numeral 510, the keep-alive signal associated with the second cell group (“Cell Group 2”) may include a second generation sequence (“Sequence 2”). For example, Cell Group 2 may include one or more cells in power-saving mode, and base stations associated with cells in Cell Group 2 may transmit the keep-alive signal associated with Cell Group 2. As indicated by reference numeral 515, the keep-alive signal associated with the third cell group (“Cell Group 3”) may include Sequence 2, but may be scheduled with a different time offset relative to the keep-alive signal associated with Cell Group 2. For example, Cell Group 3 may include one or more cells in power-saving mode, and base stations associated with cells in Cell Group 3 may transmit the keep-alive signal associated with Cell Group 3.

[0091] As mentioned above, providing Figure 5 As an example. Other examples may differ from those regarding... Figure 5 The example described.

[0092] Figure 6 This is a schematic diagram illustrating example 600 associated with keep-alive signaling for network energy saving according to this disclosure. Figure 6 As shown, Example 600 illustrates an example in which a base station periodically transmits SSB burst sets for cells in power-saving mode.

[0093] like Figure 6 As shown, the base station can periodically send a keep-alive signal 605, which indicates the presence of a cell in power-saving mode. The keep-alive signal 605 can have a defined duration and can be sent in defined keep-alive cycles. Figure 6 As further shown, the base station can periodically transmit SSB burst sets 610 for cells in power-saving mode. In some aspects, the base station can periodically transmit SSB burst sets 610 with an SSB periodicity at least partially based on the keep-alive periodicity associated with the keep-alive signal. In this case, the SSB periodicity can be an integer multiple of the keep-alive periodicity. For example, as... Figure 6 As shown, the SSB periodicity can be determined as: SSB periodicity = ScalingFactorSSB * Keep-alive periodicity, where ScalingFactorSSB is an integer scaling factor. The base station can also transmit an SSB burst set 610 with at least a minimum time offset (minOffsetToSSB) between the most recent transmission of the keep-alive signal 605 and the SSB burst set 610.

[0094] In some aspects, the UE can detect and receive the transmission of keep-alive signal 605, and the UE can monitor one or more candidate times for SSB burst set 610, at least in part, based on the received keep-alive signal 605. In some aspects, the UE can determine one or more candidate times for SSB burst set 610, at least in part, based on keep-alive periodicity, scaling factor (ScalingFactorSSB), and minimum time offset (minOffsetToSSB). For example, the UE can calculate one or more offsets (offsetToSSB) from the received keep-alive signal as offsetToSSB = i * keep-alive periodicity + minOffsetToSSB, i = 0, 1, 2, ..., ScalingFactorSSB-1. In this case, each offset (offsetToSSB) calculated by the UE is the offset between the received keep-alive signal and the corresponding candidate time for SSB burst set 610. The UE can monitor one or more candidate times associated with one or more offsets (offsetToSSB) calculated by the UE, and the UE can receive SSB burst set 610 in one of the monitored candidate times.

[0095] As mentioned above, providing Figure 6 As an example. Other examples may differ from those regarding... Figure 6 The example described.

[0096] Figure 7 This is a schematic diagram illustrating example 700 associated with keep-alive signaling for network power saving according to this disclosure. Figure 7 As shown, Example 700 illustrates an example in which a base station transmits an SSB burst set for a cell in power-saving mode, in conjunction with receiving an uplink trigger signal from a UE.

[0097] like Figure 7 As shown, the base station can periodically send a keep-alive signal 705, which indicates the existence of a cell in power-saving mode. Figure 7As further shown, after each transmission of the keep-alive signal 705, the base station can monitor the corresponding uplink trigger signal timing offset from the keep-alive signal 705 by means of the time offset (offsetToULTriggering) associated with the uplink trigger signal. In some aspects, the UE can detect and receive the transmission of the keep-alive signal 705, and the UE can send the uplink trigger signal 710 to the base station at least in part based on the reception of the keep-alive signal 705. For example, the UE's transmission of the uplink trigger signal can be offset from the keep-alive signal 705 received by the UE by the time offset (offsetToULTriggering) associated with the uplink trigger signal. The base station can detect the uplink trigger signal 710 transmitted in one of the uplink trigger signal timings, and the uplink trigger signal can trigger the base station to send an SSB burst set 715.

[0098] In some aspects, base stations can transmit keep-alive signals 705 on multiple beams. For example, such as... Figure 7 As shown, the base station can transmit keep-alive signals on the first beam B1, the second beam B2, the third beam B3, and the fourth beam B4. In some aspects, one or more resources corresponding to the uplink trigger signal 710 can be associated with each of the multiple beams on which the keep-alive signal 705 is transmitted. For example, as Figure 7 As shown, a first resource R1 (or a first resource set) can be associated with a first beam B1, a second resource R2 (or a second resource set) can be associated with a second beam B2, a third resource R3 (or a third resource set) can be associated with a third beam B3, and a fourth resource R4 (or a fourth resource set) can be associated with a fourth beam B4. In this case, resources (R1-R4) can be time resources used to transmit the uplink trigger signal 710 (e.g., during the uplink trigger signal timing, such as...). Figure 7 The resources (shown) are frequency resources for transmitting the uplink trigger signal 710, and / or code or sequence resources for transmitting the uplink trigger signal 710. The UE may transmit the uplink trigger signal 710 in resources associated with the beam on which the UE receives the keep-alive signal 705. For example, if the UE receives the keep-alive signal 705 on the first beam B1, the UE may transmit the uplink trigger signal 710 in the first resource R1 associated with the first beam B1.

[0099] In some aspects, base station 110 may form a receive beam for receiving uplink trigger signal 710 based at least in part on the association between different beams (e.g., B1-B4) on which keep-alive signal 705 is transmitted and the corresponding resources (e.g., R1-R4) on which base station 110 can receive uplink trigger signal 710. In this case, for each beam (e.g., B1-B4) used to transmit keep-alive signal 705, base station 110 may use the receive beam corresponding to that beam (e.g., a receive beam having the same beam direction as the transmit beam used to transmit keep-alive signal) to monitor the corresponding resources (e.g., R1-R4) associated with that beam. For example, during the uplink trigger signal monitoring period, the base station can use the receiving beam corresponding to the first beam B1 (e.g., having the same beam direction as the first beam B1) to monitor the first resource R1, the base station can use the receiving beam corresponding to the second beam B2 to monitor the second resource R2, the base station can use the receiving beam corresponding to the third beam B3 to monitor the third resource R3, and the base station can use the receiving beam corresponding to the fourth beam B4 to monitor the fourth resource R4.

[0100] In some aspects, the base station may transmit an SSB burst set 715 at a time offset (offsetToSSB) relative to the keep-alive signal 705 received by the UE, in conjunction with the received uplink trigger signal 710. In some aspects, the base station may transmit the SSB burst set 715 at a time offset (offsetToSSB) relative to the uplink trigger signal 710, in conjunction with the received uplink trigger signal 710. In some aspects, after transmitting the uplink trigger signal, the UE may monitor the timing of the SSB burst set and receive the SSB burst set 715 transmitted by the base station based at least in part on monitoring the timing of the SSB burst set. For example, the timing of the SSB burst set may be offset by a time offset (offsetToSSB) from the keep-alive signal 705 received by the UE, or the timing of the SSB burst set may be offset by a time offset (offsetToSSB) from the uplink trigger signal 710.

[0101] In some aspects, the resources on which the base station receives the uplink trigger signal 710 (e.g., R1, R2, R3, or R4) can be associated with the beam on which the UE receives the keep-alive signal 705 (e.g., B1, B2, B3, or B4). In this case, the resources on which the uplink trigger signal 710 is received (e.g., R1, R2, R3, or R4) can provide the base station with an indication of the beam direction to be used for communication with the UE. In some aspects, the SSB burst set 715 transmitted by the base station can be based at least in part on the resources on which the base station receives the uplink trigger signal 710 (e.g., R1, R2, R3, or R4). For example, a base station may determine the SSB periodicity, the offset of the SSB burst set (e.g., offsetToSSB), and / or which SSBs are in the SSB burst set 715 based at least in part on the resources on which the uplink trigger signal 710 is received (e.g., R1, R2, R3, or R4) (e.g., and / or at least in part on the beam direction indicated by the resource) of the resources on which the uplink trigger signal 710 is received (e.g., the beam direction indicated by the resource).

[0102] In some aspects, the MIB included in an SSB at least partially based on the SSB burst set 715 sent upon receiving the uplink trigger signal 710 may include some different information (e.g., a first information set) than information included in the MIBs of other SSBs (e.g., SSBs not at least partially based on the SSB burst set sent upon receiving the uplink trigger signal 710). For example, some information (such as indications of which SSBs were sent and SSB indices) may be conveyed in the keep-alive signal 705. In this case, bit fields in the MIB used to convey information already conveyed in the keep-alive signal 705 may be reinterpreted or reused to convey other information to the UE (e.g., power-saving parameters, time to exit the current power-saving mode, and / or a new set of access parameters for idle UEs, and other examples). In some respects, to avoid confusion for UEs that may not interpret the information correctly, it is at least in part based on the fact that the SSBs in the SSB burst set 715 sent by the received uplink trigger signal 710 can be non-cell-defined SSBs or non-grid SSBs.

[0103] As mentioned above, providing Figure 7 As an example. Other examples may differ from those regarding... Figure 7 The example described.

[0104] Figure 8This is a schematic diagram illustrating an example process 800 performed by a base station, for example, according to the present disclosure. Example process 800 is an example in which a base station (e.g., base station 110) performs operations associated with keep-alive signaling for network power saving.

[0105] like Figure 8 As shown, in some aspects, processing 800 may include sending a keep-alive signal indicating the presence of a cell in power-saving mode (block 810). For example, a base station (e.g., using...) Figure 10 The communication manager 150 and / or the transmitting component 1004 depicted herein can transmit a keep-alive signal indicating the presence of a cell in power-saving mode, as described above.

[0106] like Figure 8 As further shown, in some aspects, processing 800 may include transmitting SSB burst sets (block 820) at least in part based on keep-alive signals. For example, a base station (e.g., using...) Figure 10 The communication manager 150 and / or transmitting component 1004 described herein may transmit SSB burst sets at least in part based on keep-alive signals, as described above.

[0107] Process 800 may include additional aspects, such as any single aspect or any combination of aspects that are described below and / or that are related to one or more other processes described elsewhere herein.

[0108] In the first aspect, the duration of the keep-alive signal spans one or more consecutive symbols.

[0109] In the second aspect, either alone or in combination with the first aspect, the duration of the keep-alive signal spans multiple consecutive symbols, and transmitting the keep-alive signal includes transmitting the keep-alive signal on a first beam on a first symbol among the multiple consecutive symbols and on a second beam on a second symbol among the multiple consecutive symbols.

[0110] In the third aspect, either alone or in combination with one or more of the first and second aspects, the duration of the keep-alive signal spans multiple consecutive symbols, and the keep-alive signal comprises the same generation sequence for each of the multiple consecutive symbols.

[0111] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the duration of the keep-alive signal spans multiple consecutive symbols, and the keep-alive signal includes a first generation sequence mapped to a first symbol in the multiple consecutive symbols and a second generation sequence mapped to a second symbol in the multiple consecutive symbols.

[0112] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, at least one of the generation sequence of the keep-alive signal or the time offset of the keep-alive signal is at least partially based on a group of cells associated with one or more cells in power-saving mode.

[0113] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, sending a keep-alive signal includes periodically sending a keep-alive signal with a periodicity associated with the keep-alive signal.

[0114] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, transmitting an SSB burst set includes periodically transmitting an SSB burst set with a periodicity associated with the SSB burst set, and the periodicity associated with the SSB burst is at least partially based on the periodicity associated with the keep-alive signal.

[0115] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the periodicity associated with the SSB burst set is an integer multiple of the periodicity associated with the keep-alive signal.

[0116] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, transmitting an SSB burst set includes transmitting the SSB burst set with at least a minimum time offset between the keep-alive signal and the SSB burst set.

[0117] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, processing 800 includes receiving an uplink trigger signal from the UE, and transmitting an SSB burst set includes transmitting an SSB burst set in conjunction with receiving the uplink trigger signal.

[0118] In the eleventh aspect, receiving an uplink trigger signal, either alone or in combination with one or more of the first to tenth aspects, includes receiving the uplink trigger signal at least in part based on the timing of the uplink trigger signal based on the time offset between the monitoring and keep-alive signals.

[0119] In the twelfth aspect, transmitting an SSB burst set in conjunction with receiving an uplink trigger signal, either alone or in combination with one or more of the first to eleventh aspects, includes transmitting the SSB burst set at a time offset relative to the time offset of transmitting a keep-alive signal.

[0120] In the thirteenth aspect, transmitting an SSB burst set in conjunction with receiving an uplink trigger signal, either alone or in combination with one or more of the first to twelfth aspects, includes: transmitting the SSB burst set in conjunction with receiving the uplink trigger signal at a time offset relative to the time offset of receiving the uplink trigger signal.

[0121] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, transmitting a keep-alive signal includes transmitting a keep-alive signal on a plurality of beams, with one or more corresponding resources for an uplink trigger signal associated with each of the plurality of beams, and receiving an uplink trigger signal includes receiving the uplink trigger signal in a resource of one or more corresponding resources associated with the beam on which the UE receives the keep-alive signal.

[0122] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, one or more resources associated with each of the plurality of beams include at least one of one or more time resources for an uplink trigger signal, one or more frequency resources for an uplink trigger signal, or one or more code or sequence resources for an uplink trigger signal.

[0123] In the sixteenth aspect, receiving an uplink trigger signal in a resource of one or more resources associated with a beam on which the UE receives a keep-alive signal comprises: for each of the plurality of beams, using a corresponding receiving beam corresponding to that beam to monitor one or more resources associated with that beam.

[0124] In the seventeenth aspect, transmitting an SSB burst set in conjunction with receiving an uplink trigger signal, either alone or in combination with one or more of the first to sixteenth aspects, includes transmitting the SSB burst set at least in part based on the resource in which the uplink trigger signal is received.

[0125] In the eighteenth aspect, transmitting an SSB burst set, either alone or in combination with one or more of the first to seventeenth aspects, at least in part based on the resources on which an uplink trigger signal is received, comprises: transmitting the SSB burst set using at least one of SSB periodicity, offset, or SSB selection included in the SSB burst set, at least in part based on the resources on which the uplink trigger signal is received.

[0126] In the nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the SSB in an SSB burst includes a first information set in the main information block that is different from the second information set in the main information block of an SSB included in another SSB burst set, where the SSB is not transmitted at least partially based on a keep-alive signal.

[0127] In the twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, an SSB burst includes at least one of a non-cell-defined SSB or a non-grid SSB.

[0128] although Figure 8 An example box of process 800 is shown, but in some aspects, process 800 may include... Figure 8 The additional boxes, fewer boxes, different boxes, or boxes with different arrangements depicted in the diagram. Alternatively or concurrently, two or more boxes in process 800 may be executed in parallel.

[0129] Figure 9 This is a schematic diagram illustrating an example process 900 performed by a UE, for example, in accordance with this disclosure. Example process 900 is an example in which a UE (e.g., UE 120) performs operations associated with keep-alive signaling for network power saving.

[0130] like Figure 9 As shown, in some aspects, processing 900 may include receiving a keep-alive signal from the base station indicating the presence of a cell in power-saving mode (block 910). For example, the UE (e.g., using...) Figure 11 The communication manager 140 and / or the transmitting component 1102 depicted can receive a keep-alive signal from the base station indicating the presence of a cell in power-saving mode, as described above.

[0131] like Figure 9 As further shown, in some aspects, processing 900 may include receiving SSB burst sets from the base station at least in part based on keep-alive signals (block 920). For example, the UE (e.g., using...) Figure 11 The communication manager 140 and / or the transmitting component 1102 depicted herein may receive SSB burst sets from the base station at least in part based on keep-alive signals, as described above.

[0132] Process 900 may include additional aspects, such as any single aspect or any combination of aspects that are described below and / or that are related to one or more other processes described elsewhere herein.

[0133] In a first aspect, receiving an SSB burst set includes: monitoring one or more candidate timings for the SSB burst set at a corresponding offset to the keep-alive signal, wherein the corresponding offset for the one or more candidate timings is determined at least in part based on the periodicity associated with the keep-alive signal, a scaling factor between the periodicity associated with the keep-alive signal and the periodicity associated with the SSB burst set, and the minimum offset between the keep-alive signal and the SSB burst set; and receiving the SSB burst set at one of the candidate timings for the one or more candidate timings for the SSB burst set.

[0134] In a second aspect, either alone or in combination with the first aspect, processing 900 includes performing beam searching over multiple periodic transmissions of the keep-alive signal to select a receive beam for receiving the SSB burst set.

[0135] In a third aspect, alone or in combination with one or more of the first and second aspects, processing 900 includes: sending an uplink trigger signal to the base station, at least in part, based on receiving a keep-alive signal, for triggering the transmission of an SSB burst set performed by the base station.

[0136] In the fourth aspect, transmitting the uplink trigger signal, either alone or in combination with one or more of the first to third aspects, includes transmitting the uplink trigger signal at a time offset relative to the received keep-alive signal.

[0137] In the fifth aspect, receiving an SSB burst set, either alone or in combination with one or more of the first to fourth aspects, includes receiving the SSB burst set at least in part based on the timing of the SSB burst set based on the time offset of the monitoring and keep-alive signal offset.

[0138] In the sixth aspect, receiving an SSB burst set, either alone or in combination with one or more of the first to fifth aspects, includes receiving the SSB burst set at least in part based on the timing of the SSB burst set based on the monitoring and uplink trigger signal offset time offset.

[0139] In the seventh aspect, transmitting an uplink trigger signal, either alone or in combination with one or more of the first to sixth aspects, includes transmitting the uplink trigger signal in a resource associated with the beam on which a keep-alive signal has been received.

[0140] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the resources associated with the beam on which the keep-alive signal is received include at least one of the following: time resources for the uplink trigger signal, frequency resources for the uplink trigger signal, or code or sequence resources for the uplink trigger signal.

[0141] In the ninth aspect, receiving an SSB burst set, either alone or in combination with one or more of the first to eighth aspects, includes receiving the SSB burst set at least in part based on the transmission of an uplink trigger signal, and the SSB burst set is at least in part based on the resources in which the uplink trigger signal is transmitted.

[0142] In the tenth aspect, individually or in combination with one or more of the first to ninth aspects, at least one of the following includes the SSB periodicity of the SSB burst set, the offset of the SSB burst set, or the selection of the SSB, which is at least partially based on the resource in which the uplink trigger signal is transmitted.

[0143] In the eleventh aspect, individually or in combination with one or more of the first to tenth aspects, at least one of the following includes the SSB periodicity of the SSB burst set, the offset of the SSB burst set, or the selection of the SSB, which is at least partially based on the resource in which the uplink trigger signal is transmitted.

[0144] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the SSB in an SSB burst set includes a first information set in the main information block that is different from the second information set in the main information block included in the SSB in another SSB burst set, where the SSB in the other SSB burst set is not at least partially based on a keep-alive signal.

[0145] although Figure 9 An example box of process 900 is shown, but in some aspects, process 900 may include... Figure 9 The additional boxes, fewer boxes, different boxes, or boxes with different arrangements depicted in the diagram. Alternatively or concurrently, two or more boxes in process 900 may be executed in parallel.

[0146] Figure 10 This is a schematic diagram of an example device 1000 for wireless communication. Device 1000 may be a base station, or a base station may include device 1000. In some aspects, device 1000 includes a receiving component 1002 and a transmitting component 1004, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1000 can use the receiving component 1002 and the transmitting component 1004 to communicate with another device 1006 (such as a UE, a base station, or another wireless communication device). As further shown, device 1000 may include a communication manager 150. Communication manager 150 may include a monitoring component 1008, etc.

[0147] In some respects, device 1000 can be configured to perform the functions described herein. Figures 4-7 One or more operations described herein. Additionally or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as... Figure 8 The process 800, or a combination thereof. In some respects, Figure 10 The device 1000 and / or one or more components shown may include a combination Figure 2 One or more components of the described base station. Additionally or alternatively, Figure 10 One or more components shown can be combined Figure 2Implemented within one or more of the described components. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of that component.

[0148] Receiver 1002 may receive communications from device 1006, such as reference signals, control information, data communications, or combinations thereof. Receiver 1002 may provide the received communications to one or more other components of device 1000. In some aspects, receiver 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components of device 1006. In some aspects, receiver 1002 may include combinations of... Figure 2 The described base station includes one or more antennas, modems, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0149] Transmitting component 1004 can transmit communications such as reference signals, control information, data communications, or combinations thereof to device 1006. In some aspects, one or more other components of device 1006 can generate communications and provide the generated communications to transmitting component 1004 for transmission to device 1006. In some aspects, transmitting component 1004 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can transmit the processed signals to device 1006. In some aspects, transmitting component 1004 may include combinations of... Figure 2 The described base station includes one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof. In some aspects, the transmit component 1004 may be co-located with the receive component 1002 in a transceiver.

[0150] Transmitting component 1004 can transmit a keep-alive signal indicating the presence of a cell in power-saving mode. Transmitting component 1004 can transmit SSB burst sets at least in part based on the keep-alive signal.

[0151] The receiving component 1002 can receive an uplink trigger signal from the UE, wherein sending an SSB burst set includes: sending an SSB burst set in conjunction with receiving the uplink trigger signal.

[0152] The monitoring component 1008 can monitor the timing of the uplink trigger signal that is offset from the keep-alive signal offset time.

[0153] Figure 10 The number and arrangement of components shown are provided as an example. In practice, different arrangements may exist. Figure 10 The components shown are those that are additional, fewer, different, or arranged differently. Furthermore, Figure 10 The two or more components shown can be implemented within a single component, or Figure 10 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 10 The collection of (one or more) components shown can perform actions described as being performed by Figure 10 Another set of components shown performs one or more functions.

[0154] Figure 11 This is a schematic diagram of an example device 1100 for wireless communication. Device 1100 may be a UE, or a UE may include device 1100. In some aspects, device 1100 includes a receiving component 1102 and a transmitting component 1104, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1100 can use the receiving component 1102 and the transmitting component 1104 to communicate with another device 1106 (such as a UE, a base station, or another wireless communication device). As further shown, device 1100 may include a communication manager 140. Among other examples, communication manager 140 may also include a beam search component 1108.

[0155] In some respects, device 1100 can be configured to perform the functions described herein. Figures 4-7 One or more operations described herein. Additionally or alternatively, device 1100 may be configured to perform one or more processes described herein, such as... Figure 9 The process 900, or a combination thereof. In some respects, Figure 11 The device 1100 and / or one or more components shown may include a combination Figure 2 One or more components of the UE as described. Alternatively or alternatively, Figure 11 One or more components shown can be combined Figure 2 Implementation within one or more components described. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of that component.

[0156] Receiver 1102 may receive communications from device 1106, such as reference signals, control information, data communications, or combinations thereof. Receiver 1102 may provide the received communications to one or more other components of device 1100. In some aspects, receiver 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components of device 1106. In some aspects, receiver 1102 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0157] Transmitting component 1104 can transmit communications such as reference signals, control information, data communications, or combinations thereof to device 1106. In some aspects, one or more other components of device 1106 can generate communications and provide the generated communications to transmitting component 1104 for transmission to device 1106. In some aspects, transmitting component 1104 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can transmit the processed signals to device 1106. In some aspects, transmitting component 1104 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 1104 may be co-located with the receive component 1102 in a transceiver.

[0158] The receiving component 1102 can receive a keep-alive signal from the base station indicating the presence of a cell in power-saving mode. The receiving component 1102 can receive SSB burst sets from the base station at least in part based on the keep-alive signal.

[0159] The beam search component 1108 can perform beam search over multiple periodic transmissions of the keep-alive signal to select the receive beam for receiving the SSB burst set.

[0160] The transmitting component 1104 can at least partially transmit an uplink trigger signal to the base station to trigger the transmission of an SSB burst set by the base station based on the received keep-alive signal.

[0161] Figure 11 The number and arrangement of components shown are provided as an example. In practice, different arrangements may exist. Figure 11The components shown are those that are additional, fewer, different, or arranged differently. Furthermore, Figure 11 The two or more components shown can be implemented within a single component, or Figure 11 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 11 The collection of (one or more) components shown can perform actions described as being performed by Figure 11 Another set of components shown performs one or more functions.

[0162] The following provides an overview of some aspects of this disclosure:

[0163] Aspect 1: A method of wireless communication performed by a base station, comprising: transmitting a keep-alive signal indicating the presence of a cell in an energy-saving mode; and transmitting a set of synchronization signal block (SSB) bursts based at least in part on the keep-alive signal.

[0164] Aspect 2. The method according to aspect 1, wherein the duration of the keep-alive signal spans one or more consecutive symbols.

[0165] Aspect 3: The method according to any one of Aspects 1-2, wherein the duration of the keep-alive signal spans a plurality of consecutive symbols, and wherein transmitting the keep-alive signal comprises: transmitting the keep-alive signal on a first beam on a first symbol of the plurality of consecutive symbols and on a second beam on a second symbol of the plurality of consecutive symbols.

[0166] Aspect 4: The method according to any one of Aspects 1-3, wherein the duration of the keep-alive signal spans a plurality of consecutive symbols, and the keep-alive signal comprises the same generation sequence for each of the plurality of consecutive symbols.

[0167] Aspect 5: The method according to any one of Aspects 1-3, wherein the duration of the keep-alive signal spans a plurality of consecutive symbols, and the keep-alive signal includes a first generation sequence mapped to a first symbol in the plurality of consecutive symbols and a second generation sequence mapped to a second symbol in the plurality of consecutive symbols.

[0168] Aspect 6: The method according to any one of Aspects 1-5, wherein at least one of the generation sequence for the keep-alive signal or the time offset for the keep-alive signal is at least partially based on a group of cells associated with one or more cells in the power-saving mode.

[0169] Aspect 7: The method according to any one of Aspects 1-6, wherein sending the keep-alive signal comprises: periodically sending the keep-alive signal with a periodicity associated with the keep-alive signal.

[0170] Aspect 8: According to the method of aspect 7, wherein sending the SSB burst set comprises: periodically sending the SSB burst set with a periodicity associated with the SSB burst set, wherein the periodicity associated with the SSB burst is at least partially based on the periodicity associated with the keep-alive signal.

[0171] Aspect 9: According to the method of aspect 8, wherein the periodicity associated with the SSB burst set is an integer multiple of the periodicity associated with the keep-alive signal.

[0172] Aspect 10: The method according to any one of Aspects 8-9, wherein transmitting the SSB burst set further comprises: transmitting the SSB burst set with at least a minimum time offset between the keep-alive signal and the SSB burst set.

[0173] Aspect 11: The method according to any one of Aspects 1-7 further includes: receiving an uplink trigger signal from a user equipment (UE), wherein sending the SSB burst set includes: sending the SSB burst set in conjunction with receiving the uplink trigger signal.

[0174] Aspect 12: According to the method of aspect 11, receiving the uplink trigger signal includes: receiving the uplink trigger signal at least in part based on the timing of monitoring the uplink trigger signal offset from the keep-alive signal offset time.

[0175] Aspect 13: The method according to any one of Aspects 11-12, wherein sending the SSB burst set in conjunction with receiving the uplink trigger signal comprises: sending the SSB burst set at a time offset relative to the time offset from sending the keep-alive signal in conjunction with receiving the uplink trigger signal.

[0176] Aspect 14: The method according to any one of Aspects 11-12, wherein transmitting the SSB burst set in conjunction with receiving the uplink trigger signal comprises: transmitting the SSB burst set in conjunction with receiving the uplink trigger signal at a time offset relative to the time offset of receiving the uplink trigger signal.

[0177] Aspect 15: The method according to any one of Aspects 11-14, wherein transmitting the keep-alive signal includes transmitting the keep-alive signal on a plurality of beams, wherein one or more corresponding resources for the uplink trigger signal are associated with each of the plurality of beams, and wherein receiving the uplink trigger signal includes receiving the uplink trigger signal in a resource of one or more corresponding resources associated with the beam on which the UE receives the keep-alive signal.

[0178] Aspect 16: The method according to aspect 15, wherein the one or more resources associated with each of the plurality of beams include at least one of the following: one or more time resources for the uplink trigger signal, one or more frequency resources for the uplink trigger signal, or one or more code or sequence resources for the uplink trigger signal.

[0179] Aspect 17: The method according to any one of Aspects 15-16, wherein receiving the uplink trigger signal in the resources of the corresponding one or more resources associated with the beam on which the UE receives a keep-alive signal comprises: for each of the plurality of beams, using a corresponding receiving beam corresponding to that beam to monitor the corresponding one or more resources associated with that beam.

[0180] Aspect 18: The method according to any one of Aspects 15-17, wherein sending the SSB burst set in conjunction with receiving the uplink trigger signal comprises: sending the SSB burst set at least in part based on the resource in which the uplink trigger signal is received.

[0181] Aspect 19: The method according to aspect 18, wherein transmitting the SSB burst set based at least in part on the resource on which the uplink trigger signal is received comprises: transmitting the SSB burst set using at least one of SSB periodicity, offset, or SSB selection included in the SSB burst set based at least in part on the resource on which the uplink trigger signal is received.

[0182] Aspect 20: The method according to any one of Aspects 1-19, wherein the SSB in the SSB burst includes a first information set in the master information block that is different from the second information set in the master information block included in the SSB in another SSB burst set, the SSB in the other SSB burst set not being transmitted at least in part based on the keep-alive signal.

[0183] Aspect 21: The method according to aspect 20, wherein the SSB burst includes at least one of a non-cell-defined SSB or a non-grid SSB.

[0184] Aspect 22: A method of wireless communication performed by a user equipment (UE), comprising: receiving from a base station a keep-alive signal indicating the presence of a cell in an energy-saving mode; and receiving from the base station a set of synchronization signal block (SSB) bursts based at least in part on the keep-alive signal.

[0185] Aspect 23: The method according to aspect 22, wherein receiving the SSB burst set comprises: monitoring one or more candidate timings for the SSB burst set at a corresponding offset to the keep-alive signal, wherein the corresponding offset for the one or more candidate timings is determined at least in part based on the periodicity associated with the keep-alive signal, a scaling factor between the periodicity associated with the keep-alive signal and the periodicity associated with the SSB burst set, and the minimum offset between the keep-alive signal and the SSB burst set; and receiving the SSB burst set at a candidate timing among the one or more candidate timings for the SSB burst set.

[0186] Aspect 24: The method according to aspect 23 further includes: performing a beam search on a plurality of periodic transmissions of the keep-alive signal to select a receive beam for receiving the SSB burst set.

[0187] Aspect 25: The method according to aspect 22 further includes: sending an uplink trigger signal to the base station, at least in part, based on receiving the keep-alive signal, for triggering the transmission of the SSB burst set by the base station.

[0188] Aspect 26: According to the method of aspect 25, sending the uplink trigger signal includes: sending the uplink trigger signal at a time offset relative to the time offset of receiving the keep-alive signal.

[0189] Aspect 27: The method according to any one of Aspects 25-26, wherein receiving the SSB burst set comprises: receiving the SSB burst set at least in part based on monitoring the timing of the SSB burst set offset from the keep-alive signal offset time.

[0190] Aspect 28: The method according to any one of Aspects 25-26, wherein receiving the SSB burst set comprises: receiving the SSB burst set at least in part based on monitoring the timing of the SSB burst set offset from the uplink trigger signal offset.

[0191] Aspect 29: The method according to any one of Aspects 25-26, wherein transmitting the uplink trigger signal comprises: transmitting the uplink trigger signal in a resource associated with the beam on which the keep-alive signal is received.

[0192] Aspect 30: The method according to aspect 29, wherein the resources associated with the beam on which the keep-alive signal is received include at least one of the following: time resources for the uplink trigger signal, frequency resources for the uplink trigger signal, or code or sequence resources for the uplink trigger signal.

[0193] Aspect 31: The method according to any one of Aspects 29-30, wherein receiving the SSB burst set comprises: receiving the SSB burst set at least in part based on sending the uplink trigger signal, wherein the SSB burst set is at least in part based on the resource in which the uplink trigger signal was sent.

[0194] Aspect 32: The method according to aspect 31, wherein at least one of the SSB periodicity of the SSB burst set, the offset of the SSB burst set, or the selection of the SSB is at least partially based on the resource in which the uplink trigger signal is transmitted.

[0195] Aspect 33: The method according to any one of Aspects 22-32, wherein at least one of the SSB periodicity of the SSB burst set, the offset of the SSB burst set, or the selection of the SSB is at least partially based on the resource in which the uplink trigger signal is transmitted.

[0196] Aspect 34: According to the method of aspect 33, wherein the SSB in the SSB burst set includes a first information set in the master information block that is different from the second information set included in the master information block of the SSB in another SSB burst set, the SSB in the other SSB burst set is not at least partially based on the keep-alive signal.

[0197] Aspect 35: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1-21.

[0198] Aspect 36: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more aspects of aspects 22-34.

[0199] Aspect 37: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the methods of one or more aspects of aspects 1-21.

[0200] Aspect 38: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the methods of one or more aspects of aspects 22-34.

[0201] Aspect 39: An apparatus for wireless communication, comprising at least one unit for performing the methods of one or more aspects of aspects 1-21.

[0202] Aspect 40: An apparatus for wireless communication, comprising at least one unit for performing the methods of one or more aspects of aspects 22-34.

[0203] Aspect 41: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 1-21.

[0204] Aspect 42: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 22-34.

[0205] Aspect 43: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the methods of one or more aspects of aspects 1-21.

[0206] Aspect 44: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the methods of one or more aspects of aspects 22-34.

[0207] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in the various aspects.

[0208] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. "Software" should be interpreted broadly to mean instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, and other examples, whether referred to as software, firmware, middleware, microcode, hardware description languages, or others. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It is obvious that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited to these aspects. Therefore, this document describes the operation and behavior of systems and / or methods without reference to specific software code, as those skilled in the art will understand that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0209] As used in this article, “meeting the threshold” can refer to a value 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, or not equal to the threshold, depending on the context.

[0210] Although specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. Many of these features can be combined in ways not specifically recited in the claims and / or disclosed in the specification. The disclosure of the aspects includes combinations of each dependent claim with each other claim in the claim set. As used herein, the phrase “at least one” referring to the list of items means any combination of those items, including single members. 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 identical elements (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 order of a, b, and c).

[0211] Unless explicitly stated otherwise, no element, action, or instruction used herein should be construed as critical or necessary. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Similarly, as used herein, the article “the” is intended to include one or more items mentioned in combination with the article “the” and is interchangeable with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and are interchangeable with “one or more.” If referring to only one item, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Additionally, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “any” or “only one of”).

Claims

1. A base station for wireless communication, comprising: Memory; as well as One or more processors coupled to memory are configured to: Send a keep-alive signal indicating that a cell is in energy-saving mode; as well as Synchronization Signal Block (SSB) burst sets are sent at least in part based on the keep-alive signal.

2. The base station according to claim 1, wherein, The keep-alive signal lasts for a duration spanning multiple consecutive symbols, and wherein the one or more processors used to send the keep-alive signal are configured to: The keep-alive signal is transmitted on a first beam on a first symbol of the plurality of consecutive symbols and on a second beam on a second symbol of the plurality of consecutive symbols.

3. The base station according to claim 1, wherein, The duration of the keep-alive signal spans multiple consecutive symbols, and the keep-alive signal includes the same generation sequence for each of the multiple consecutive symbols.

4. The base station according to claim 1, wherein, The duration of the keep-alive signal spans multiple consecutive symbols, and the keep-alive signal includes a first generation sequence mapped to a first symbol in the multiple consecutive symbols and a second generation sequence mapped to a second symbol in the multiple consecutive symbols.

5. The base station according to claim 1, wherein, At least one of the generation sequence for the keep-alive signal or the time offset for the keep-alive signal is at least partially based on a group of cells associated with one or more cells in the power-saving mode.

6. The base station according to claim 1, wherein, The one or more processors used to send the keep-alive signal are configured to periodically send the keep-alive signal with a periodicity associated with the keep-alive signal, and wherein the one or more processors used to send the SSB burst set are configured to: The SSB burst set is periodically transmitted with a periodicity associated with it, wherein the periodicity associated with the SSB burst is at least partially based on the periodicity associated with the keep-alive signal.

7. The base station according to claim 6, wherein, The periodicity associated with the SSB burst set is an integer multiple of the periodicity associated with the keep-alive signal, and wherein the one or more processors for sending the SSB burst set are further configured to: The SSB burst set is transmitted with at least the minimum time offset between the keep-alive signal and the SSB burst set.

8. The base station according to claim 1, wherein, The one or more processors are further configured to receive an uplink trigger signal from a user equipment (UE), and wherein the one or more processors for transmitting the SSB burst set are configured to: The SSB burst set is sent in conjunction with the received uplink trigger signal.

9. The base station according to claim 8, wherein, The one or more processors for receiving the uplink trigger signal are configured to: receive the uplink trigger signal at least in part based on the timing of the uplink trigger signal, which is monitored relative to the keep-alive signal offset time; and wherein the one or more processors for collectively receiving the uplink trigger signal to send the SSB burst set are configured to: The SSB burst set is sent at a time offset relative to the time offset of sending the keep-alive signal or at a time offset relative to the time offset of receiving the uplink trigger signal, in conjunction with the receipt of the uplink trigger signal.

10. The base station according to claim 8, wherein, The one or more processors for transmitting the keep-alive signal are configured to: transmit the keep-alive signal on a plurality of beams, wherein one or more resources for the uplink trigger signal are associated with each of the plurality of beams, and wherein the one or more processors for receiving the uplink trigger signal are configured to: The uplink trigger signal is received in one or more resources associated with the beam on which the UE receives the keep-alive signal.

11. The base station according to claim 10, wherein, The one or more resources associated with each of the plurality of beams include at least one of the following: One or more time resources for the uplink trigger signal One or more frequency resources used for the uplink trigger signal, or One or more code or sequence resources used for the uplink trigger signal.

12. The base station according to claim 10, wherein, The one or more processors for receiving the uplink trigger signal in the resources of one or more corresponding resources associated with the beam on which the keep-alive signal is received are configured to: For each of the plurality of beams, a corresponding receiving beam is used to monitor one or more resources associated with that beam.

13. The base station according to claim 10, wherein, The one or more processors used to transmit the SSB burst set in conjunction with the received uplink trigger signal are configured to: The SSB burst set is transmitted, at least in part, based on the resource in which the uplink trigger signal is received, to include at least one of SSB periodicity, offset, or SSB selection in the SSB burst set.

14. The base station according to claim 1, wherein, The SSB in the SSB burst set includes a first information set in the main information block that is different from the second information set in the main information block included in the SSB in another SSB burst set, wherein the SSB in the other SSB burst set is not transmitted at least in part based on the keep-alive signal, and wherein the SSB burst set includes at least one of non-cell-defined SSBs or non-grid SSBs.

15. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to memory are configured to: Receive keep-alive signal from the base station indicating the presence of a cell in power-saving mode; as well as The synchronization signal block (SSB) burst set is received from the base station at least in part based on the keep-alive signal.

16. The UE according to claim 15, wherein, The one or more processors used to receive the SSB burst set are configured to: Monitor one or more candidate timings for the SSB burst set at a corresponding offset from the keep-alive signal, wherein the corresponding offset for the one or more candidate timings is determined at least in part based on the periodicity associated with the keep-alive signal, a scaling factor between the periodicity associated with the keep-alive signal and the periodicity associated with the SSB burst set, and the minimum offset between the keep-alive signal and the SSB burst set; and The SSB burst set is received at one of the candidate times for the one or more candidate times for the SSB burst set.

17. The UE according to claim 16, wherein, The one or more processors are further configured to: A beam search is performed on multiple periodic transmissions of the keep-alive signal to select a receive beam for receiving the SSB burst set.

18. The UE according to claim 15, wherein, The one or more processors are further configured to: At least in part, based on receiving the keep-alive signal, an uplink trigger signal is sent to the base station to trigger the transmission of the SSB burst set by the base station.

19. The UE according to claim 18, wherein, The one or more processors for sending the uplink trigger signal are configured to: send the uplink trigger signal at a time offset relative to the time offset of receiving the keep-alive signal, and wherein the one or more processors for receiving the SSB burst set are configured to: The SSB burst set is received at least in part based on the timing of the SSB burst set, which is monitored to be offset from the keep-alive signal or the uplink trigger signal.

20. The UE according to claim 18, wherein, The one or more processors used to send the uplink trigger signal are configured to: The uplink trigger signal is transmitted in the resource associated with the beam on which the keep-alive signal is received.

21. A method for performing wireless communication by a base station, comprising: Send a keep-alive signal indicating that a cell is in energy-saving mode; as well as Synchronization Signal Block (SSB) burst sets are sent at least in part based on the keep-alive signal.

22. The method according to claim 21, wherein, Sending the keep-alive signal includes periodically sending the keep-alive signal with a periodicity associated with the keep-alive signal, and wherein sending the SSB burst set includes: The SSB burst set is periodically transmitted with a periodicity associated with it, wherein the periodicity associated with the SSB burst is at least partially based on the periodicity associated with the keep-alive signal.

23. The method according to claim 22, wherein, The periodicity associated with the SSB burst set is an integer multiple of the periodicity associated with the keep-alive signal.

24. The method of claim 21, further comprising: Receiving an uplink trigger signal from a user equipment (UE), wherein sending the SSB burst set includes: sending the SSB burst set in conjunction with receiving the uplink trigger signal.

25. The method according to claim 24, wherein, Receiving the uplink trigger signal includes: The uplink trigger signal is received at least in part based on the timing of the uplink trigger signal, which is monitored relative to the time offset of the keep-alive signal.

26. The method according to claim 24, wherein, Sending the keep-alive signal includes: sending the keep-alive signal on a plurality of beams, wherein one or more resources corresponding to the uplink trigger signal are associated with each of the plurality of beams, and wherein receiving the uplink trigger signal includes: The uplink trigger signal is received in one or more resources associated with the beam on which the UE receives the keep-alive signal.

27. The method according to claim 26, wherein, Sending the SSB burst set in conjunction with receiving the uplink trigger includes: The SSB burst set is transmitted, at least in part, based on the resource in which the uplink trigger signal is received, to include at least one of SSB periodicity, offset, or SSB selection in the SSB burst set.

28. A method for wireless communication performed by a user equipment (UE), comprising: Receive keep-alive signal from the base station indicating the presence of a cell in power-saving mode; as well as The synchronization signal block (SSB) burst set is received from the base station at least in part based on the keep-alive signal.

29. The method according to claim 28, wherein, Receiving the SSB burst set includes: Monitor one or more candidate timings for the SSB burst set at a corresponding offset from the keep-alive signal, wherein the corresponding offset for the one or more candidate timings is determined at least in part based on the periodicity associated with the keep-alive signal, a scaling factor between the periodicity associated with the keep-alive signal and the periodicity associated with the SSB burst set, and the minimum offset between the keep-alive signal and the SSB burst set; and The SSB burst set is received at one of the candidate times for the one or more candidate times for the SSB burst set.

30. The method of claim 28, further comprising: At least in part, based on receiving the keep-alive signal, an uplink trigger signal is sent to the base station to trigger the transmission of the SSB burst set by the base station.

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