Wake-up beam management

Abstract

Certain aspects of the present disclosure provide techniques for determining which resources and beams to use when monitoring for a wake-up signal (WUS). Specific aspects provide a method performed by a user equipment (UE), the method generally comprising: measuring one or more synchronization signal blocks (SSBs) sent from a network entity, determining one or more WUS opportunities and receive (RX) beams to monitor based on the SSB measurements, and deciding to wake up for an ON duration if a WUS is detected in one of the monitored opportunities.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. application No. 17 / 196,892, filed on March 9, 2021, which claims the benefit of and priority to U.S. Provisional Patent Application No. 62 / 987,734, filed on March 10, 2020, both of which are assigned to the assignee of this application and are hereby expressly incorporated by reference in their entirety as if fully set forth below and for all applicable purposes. Technical Field

[0003] Certain aspects of the present disclosure provide techniques for determining resources and beams to use when monitoring for a wake-up signal (WUS). Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, broadcasting, and the like. These wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, or other resources). The multiple access technologies may rely on any of code division, time division, frequency division, orthogonal frequency division, single carrier frequency division, or time division synchronous code division multiple access (TD-SCDMA) systems, to name a few. These and other multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, regional, or even global level.

[0005] As demand for mobile broadband access continues to increase, there is a need for further improvements to NR and LTE technologies. These improvements should also apply to other multi-access technologies and the telecommunication standards that employ them. Summary of the Invention

[0006] Certain aspects may be implemented in a method for wireless communication by a user equipment (UE). The method generally includes measuring one or more synchronization signal blocks (SSBs) transmitted from a network entity, determining one or more wake-up signal (WUS) opportunities and receive (RX) beams to monitor based on the SSB measurements, and deciding to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0007] Certain aspects may be implemented in an apparatus for wireless communication by a UE. The apparatus may include a processing system comprising: a memory including computer-executable instructions; and one or more processors configured to execute the computer-executable instructions and cause the processing system to measure one or more SSBs transmitted from a network entity, determine one or more WUS opportunities and RX beams to monitor based on the SSB measurements, and decide to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0008] Certain aspects may be implemented in an apparatus for wireless communication by a UE. The apparatus may include means for measuring one or more SSBs transmitted from a network entity, means for determining one or more WUS opportunities and RX beams to monitor based on the SSB measurements, and means for deciding to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0009] Certain aspects may be implemented in a non-transitory computer-readable medium for wireless communication by a UE. The non-transitory computer-readable medium may include computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to measure one or more SSBs transmitted from a network entity, determine one or more WUS opportunities and RX beams to monitor based on the SSB measurements, and decide to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0010] Certain aspects may be implemented in a computer program product embodied on a computer-readable storage medium for wireless communication by a UE. The computer-readable storage medium may include code for measuring one or more SSBs transmitted from a network entity, code for determining one or more WUS opportunities and RX beams to monitor based on the SSB measurements, and code for deciding to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0011] Certain aspects may be implemented in a method for wireless communication by a network entity. The method generally includes transmitting an SSB to a UE, determining one or more WUS opportunities and a transmit (TX) beam for transmitting one or more WUSs based on an association with the SSB, and transmitting one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0012] Certain aspects may be implemented in an apparatus for wireless communication by a network entity. The apparatus may include a processing system comprising: a memory including computer-executable instructions; and one or more processors configured to execute the computer-executable instructions and cause the processing system to transmit an SSB to a UE, determine one or more WUS opportunities and TX beams for transmitting one or more WUSs based on an association with the SSB, and transmit the one or more WUSs in one or more of the WUS opportunities using the determined TX beams.

[0013] Certain aspects may be implemented in an apparatus for wireless communication by a network entity. The apparatus may include: means for transmitting an SSB to a UE, means for determining one or more WUS opportunities and a TX beam for transmitting one or more WUSs based on an association with the SSB, and means for transmitting the one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0014] Certain aspects may be implemented in a non-transitory computer-readable medium for wireless communication by a network entity. The non-transitory computer-readable medium may include computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to transmit an SSB to a UE, determine one or more WUS opportunities and TX beams for transmitting one or more WUSs based on an association with the SSB, and transmit one or more WUSs in one or more of the WUS opportunities using the determined TX beams.

[0015] Certain aspects may be implemented in a computer program product embodied on a computer-readable storage medium for wireless communication by a network entity. The computer-readable storage medium may include code for transmitting an SSB to a UE, code for determining one or more WUS opportunities and a TX beam for transmitting one or more WUSs based on an association with the SSB, and code for transmitting one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0016] The foregoing has outlined rather broadly the features and technical advantages of examples according to the present disclosure so that the following detailed description may be better understood. Additional features and advantages will be described below. The concepts and specific examples disclosed may readily be used as a basis for modifying or designing other structures for achieving the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, namely, their organization and method of operation, and associated advantages, will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the figures is provided for purposes of illustration and description and not as a definition of limitations to the claims.

[0017] While aspects and embodiments are described in this application through illustrations of some examples, those skilled in the art will appreciate that additional implementations and use cases can be implemented in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, embodiments and / or uses can be implemented through integrated chip embodiments and other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement equipment, medical devices, AI-enabled devices, etc.). While some examples may or may not be specifically targeted at use cases or applications, the broad applicability of the described innovations may exist. The spectrum of implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or OEM devices or systems that incorporate one or more aspects of the described innovations. In some practical settings, devices that incorporate the various aspects and features described may also have to include additional components and features for the implementation and practice of the claimed and described embodiments. For example, the transmission and reception of wireless signals must include several components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.) It is intended that the innovations described herein can be practiced in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., having various sizes, shapes, and configurations.

[0018] For purposes of illustration, the following description and drawings set forth certain features. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings depict certain features of the various aspects described herein and should not be considered as limiting the scope of the disclosure.

[0020] Figure 1 is a block diagram conceptually illustrating an example wireless communication network in accordance with certain aspects of the present disclosure.

[0021] Figure 2is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0022] Figure 3 is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0023] Figure 4 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0024] Figure 5 is a diagram illustrating an example for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.

[0025] Figure 6 Illustrated are examples of frame formats for New Radio (NR) systems, in accordance with certain aspects of the present disclosure.

[0026] Figure 7 Illustrated is how different synchronization signal blocks (SSBs) may be sent using different beams in accordance with certain aspects of the present disclosure.

[0027] Figure 8 An example quasi-co-located (QCL) relationship according to certain aspects of the present disclosure is illustrated.

[0028] Figure 9 An example beam management process according to certain aspects of the present disclosure is illustrated.

[0029] Figure 10 Connected mode discontinuous reception (C-DRX) operation is illustrated in which aspects of the present disclosure may be practiced.

[0030] Figure 11 C-DRX with beamforming is illustrated in which aspects of the present disclosure may be practiced.

[0031] Figure 12A and Figure 12B Example C-DRX with wake-up signal (WUS) configurations 1200A and 1200B are illustrated in which aspects of the present disclosure may be practiced.

[0032] Figure 13 Example operations for wireless communications by a UE are illustrated, in accordance with certain aspects of the present disclosure.

[0033] Figure 14 Example operations for wireless communications by a network entity are illustrated, in accordance with certain aspects of the present disclosure.

[0034] Figure 15is a call flow diagram illustrating example SSB-based beam management for WUS monitoring in accordance with certain aspects of the present disclosure.

[0035] Figure 16 and Figure 17 Examples of SSB and resource association for uplink (UL) transmission according to aspects of the present disclosure are illustrated.

[0036] Figure 18 Illustrated are communications devices that may include various components configured to perform operations for the techniques disclosed herein, in accordance with aspects of the present disclosure.

[0037] Figure 19 Illustrated are communications devices that may include various components configured to perform operations for the techniques disclosed herein, in accordance with aspects of the present disclosure. DETAILED DESCRIPTION

[0038] Various aspects of the present disclosure provide systems and methods for determining resources and beams to use when monitoring a wake-up signal (WUS). More specifically, various aspects of the present disclosure provide techniques that can help a reduced-capability UE (e.g., based on an association between a synchronization signal block (SSB) and the beam to be used to send one or more WUS transmissions) determine one or more WUS opportunities and receive beams to use when monitoring a WUS.

[0039] Introduction to wireless communication networks

[0040] Figure 1 An example of a wireless communication network 100 (e.g., a NR / 5G network) is illustrated in which various aspects described herein may be implemented.

[0041] For example, executing Figure 14 The base station (BS) 110b of operation 1400 may send one or more WUSs to the user equipment (UE) 120. The UE 120 may perform Figure 13 Operation 1300 is to determine resources and beams to be used for monitoring one or more WUSs.

[0042] like Figure 1As shown, the wireless network 100 may include multiple BSs 110 and other network entities. A BS may be a station that communicates with a user equipment (UE). Each BS 110 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a NodeB (NB) and / or a NodeB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and next-generation NodeB (gNB), new radio (NR) BS, 5G NB, access point (AP), or transmit receive point (TRP) may be interchangeable. In some examples, a cell may not necessarily be fixed, and the geographic area of ​​a cell may move depending on the location of a mobile BS. In some examples, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, etc.).

[0043] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0044] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a smaller geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more (e.g., three) cells.

[0045] The wireless communication network 100 may also include a relay station. A relay station is a station that receives data transmissions and / or other information from an upstream station (e.g., a BS or a UE) and sends data transmissions and / or other information to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that relays transmissions for other UEs. Figure 1 In the example shown, a relay station 110r may communicate with a BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r. A relay station may also be referred to as a relay BS, a relay, or the like.

[0046] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relays, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a higher transmit power level (e.g., 20 watts), while a pico BS, a femto BS, and a relay may have a lower transmit power level (e.g., 1 watt).

[0047] The wireless communication network 100 can support synchronous or asynchronous operation. For synchronous operation, the BSs can have similar frame timing, and transmissions from different BSs can be roughly aligned in time. For asynchronous operation, the BSs can have different frame timing, and transmissions from different BSs can be misaligned in time. The techniques described herein can be used for both synchronous and asynchronous operation.

[0048] The network controller 130 may be coupled to a group of BSs and provide coordination and control for these BSs. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other (eg, directly or indirectly) via wireless or wired backhaul.

[0049] UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical instrument, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired media. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide, for example, connectivity to or to a network (e.g., a wide area network (such as the Internet or a cellular network)) via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0050] Some wireless networks (e.g., LTE) use orthogonal frequency division multiplexing (OFDM) on the downlink (DL) and single-carrier frequency division multiplexing (SC-FDM) on the uplink (UL). OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the subcarrier spacing can be 15 kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180 kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be divided into subbands. For example, one subband may cover 1.08 MHz (e.g., 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0051] Although various aspects of the examples described herein may be associated with LTE technology, various aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may use OFDM with CP on both the UL and DL and include support for half-duplex operation using TDD. Beamforming may be supported, and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.

[0052] In some examples, access to the air interface can be scheduled, where a scheduling entity (e.g., a BS) allocates resources for communications between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, specifying, reconfiguring, and releasing resources for one or more subordinate entities. In other words, for scheduled communications, the subordinate entities utilize the resources allocated by the scheduling entity. The BS is not the only entity that can serve as a scheduling entity. In some examples, a UE can serve as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can use the resources scheduled by the UE for wireless communications. In some examples, a UE can serve as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, the UEs can also communicate directly with each other.

[0053] exist Figure 1 In FIG, a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on DL and / or UL. A thin dashed line with double arrows indicates interfering transmissions between the UE and the BS.

[0054] Figure 2 Illustrated in Figure 1 An exemplary logical architecture of a distributed radio access network (RAN) 200 implemented in the wireless communication network 100 is shown. A 5G access node 206 may include an access node controller (ANC) 202. The ANC 202 may be a central unit (CU) of the distributed RAN 200. A backhaul interface to a next-generation core network (NG-CN) 204 may terminate at the ANC 202. A backhaul interface to a neighboring next-generation access node (NG-AN) 210 may terminate at the ANC 202. The ANC 202 may include one or more transmit receive points (TRPs) 208 (e.g., cells, BSs, gNBs, etc.).

[0055] The TRP 208 may be a distributed unit (DU). The TRP 208 may be connected to a single ANC (e.g., ANC 202) or to more than one ANC (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific ANC deployments, the TRP 208 may be connected to more than one ANC. The TRPs 208 may each include one or more antenna ports. The TRPs 208 may be configured to serve traffic to the UE individually (e.g., dynamically selected) or jointly (e.g., joint transmission).

[0056] The logical architecture of the distributed RAN 200 can support fronthaul solutions across different deployment types. For example, the logical architecture can be based on transport network capabilities (e.g., bandwidth, delay, and / or jitter).

[0057] The logical architecture of the distributed RAN 200 may share features and / or components with LTE. For example, the next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.

[0058] The logical architecture of the distributed RAN 200 may enable collaboration between and among RPs 208 (eg, within a TRP and / or between TRPs via the ANC 202). An inter-TRP interface may not be used.

[0059] Logical functions can be dynamically distributed in the logical architecture of the distributed RAN 200. Figure 5 Described in more detail, the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical layer (PHY) layer can be adaptively placed at the DU (e.g., TRP 208) or the CU (e.g., ANC202).

[0060] Figure 3 An example physical architecture of a distributed RAN 300 according to certain aspects of the present disclosure is illustrated. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally deployed. To handle peak capacity, C-CU 302 functions may be offloaded (e.g., to Advanced Wireless Services (AWS)).

[0061] The centralized RAN unit (C-RU) 304 can host one or more ANC functions. Alternatively, the C-RU 304 can host core network functions locally. The C-RU 304 can have a distributed deployment. The C-RU 304 can be closer to the network edge.

[0062] The DU 306 may host one or more TRPs (edge ​​nodes (EN), edge units (EU), radio heads (RH), smart radio heads (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) capabilities.

[0063] Figure 4 Illustrated are exemplary components of BS 110 and UE 120 that may be used to implement aspects of the present disclosure (eg, Figure 1 For example, antennas 452, processors 466, 458, 464, and / or controller / processor 480 of UE 120 and / or antennas 434, processors 420, 430, 438, and / or controller / processor 440 of BS 110 may be used to perform the various techniques and methods described herein.

[0064] At BS 110, a transmit processor 420 may receive data from a data source 412 and control information from a controller / processor 440. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a packet common PDCCH (GC PDCCH), etc. Data may be for a physical downlink shared channel (PDSCH), etc. Processor 420 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Processor 420 may also generate reference symbols, such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS). A transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, and / or reference symbols (if applicable), and may provide output symbol streams to modulators (MODs) 432a through 432t. Each modulator 432 can process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. The DL signals from modulators 432a through 432t can be transmitted via antennas 434a through 434t, respectively.

[0065] At UE 120, antennas 452a through 452r may receive downlink signals from BS 110 and may provide received signals to demodulators (DEMODs) in transceivers 454a through 454r, respectively. Each demodulator may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 456 may obtain received symbols from all demodulators in transceivers 454a through 454r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120 to a data sink 460, and provide decoded control information to a controller / processor 480.

[0066] On the UL, at UE 120, a transmit processor 464 may receive and process data from a data source 462 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466, if applicable, further processed by demodulators in transceivers 454a through 454r (e.g., for SC-FDM, etc.), and transmitted to BS 110a. At BS 110, the UL signal from UE 120 may be received by antenna 434, processed by modulator 432, detected by MIMO detector 436, if applicable, and further processed by receive processor 438 to obtain decoded data and control information transmitted by UE 120. The receive processor 438 may provide decoded data to a data sink 439 and decoded control information to a controller / processor 440 .

[0067] The controllers / processors 440 and 480 may direct the operation at the BS 110 and the UE 120, respectively. The processor 440 and / or other processors and modules at the BS 110 may perform or direct the execution of processes for the techniques described herein (e.g., executing Figure 14 Operation 1400 of BS 110), and the processor 480 and / or other processors and modules at BS 110 may perform or direct the execution of processes for the techniques described herein (e.g., executing Figure 13 1300). Memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 444 may schedule UEs for data transmission on the downlink and / or uplink.

[0068] Figure 5A diagram 500 illustrating an example for implementing a communication protocol stack according to various aspects of the present disclosure is illustrated. The illustrated communication protocol stack can be implemented by a device operating in a wireless communication system, such as a 5G system (e.g., a system supporting uplink-based mobility). Diagram 500 illustrates a communication protocol stack that includes a radio resource control (RRC) layer 510, a packet data convergence protocol (PDCP) layer 515, a radio link control (RLC) layer 520, a medium access control (MAC) layer 525, and a physical (PHY) layer 530. In various examples, the layers of the protocol stack can be implemented as separate software modules, portions of a processor or ASIC, portions of non-co-located devices connected by a communication link, or various combinations thereof. For example, co-located and non-co-located implementations can be used in a protocol stack for a network access device (e.g., AN, CU, and / or DU) or a UE.

[0069] The first option 505-a illustrates a split implementation of the protocol stack, where the implementation of the protocol stack is performed on a centralized network access device (e.g., Figure 2 202 in the ANC 200) and distributed network access equipment (e.g., Figure 2 208 in the CU). In the first option 505-a, the RRC layer 510 and the PDCP layer 515 can be implemented by the central unit, while the RLC layer 520, the MAC layer 525, and the PHY layer 530 can be implemented by the DU. In various examples, the CU and the DU can be co-located or non-co-located. The first option 505-a may be useful in macrocell, microcell, or picocell deployments.

[0070] The second option 505-b illustrates a unified implementation of the protocol stack, wherein the protocol stack is implemented in a single network access device. In the second option, the RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530 can each be implemented by an AN. The second option 505-b may be useful, for example, in a femtocell deployment.

[0071] Regardless of whether the network access device implements part or all of the protocol stack, the UE can implement the entire protocol stack, as shown in 505-c (e.g., RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525 and PHY layer 530).

[0072] The embodiments discussed herein may include various spacing and timing deployments. For example, in LTE, the basic transmission time interval (TTI) or packet duration is a 1ms subframe. In NR, the subframe is still 1ms, but the basic TTI is called a time slot. A subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16, ... time slots) depending on the subcarrier spacing (SCS). An NR resource block (RB) is 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing (SCS) of 15KHz, and other SCSs can be defined relative to the basic SCS, such as 30kHz, 60kHz, 120kHz, 240kHz, etc. The symbol and time slot lengths are proportional to the SCS. The CP length also depends on the subcarrier spacing.

[0073] Figure 6 is a diagram illustrating an example of a frame format 600 for NR according to certain aspects of the present disclosure. The transmission timeline for each of the DL and UL may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into 10 subframes indexed from 0 to 9, each subframe being 1 ms. Each subframe may include a variable number of slots, depending on the subcarrier spacing. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols), depending on the subcarrier spacing. The symbol periods in each slot may be assigned indices. A microslot, which may be referred to as a subslot structure, refers to a transmission time interval having a duration less than one slot (e.g., 2, 3, or 4 symbols).

[0074] Each symbol in a slot can indicate the link direction of data transmission (e.g., DL, UL, or flexible), and the link direction can be dynamically switched for each subframe. The link direction can be based on the slot format. Each slot can include DL / UL data and DL / UL control information.

[0075] In NR, a synchronization signal block (SSB) is transmitted. SSB includes PSS, SSS and dual-symbol PBCH. SSB can be sent at a fixed time slot position, such as Figure 6Symbols 0-3 are shown. The UE can use PSS and SSS for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within the radio frame, SS burst set periodicity, system frame number, etc. SSB can be organized into SS bursts to support beam scanning. Other system information, such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI), can be sent on the physical downlink shared channel (PDSCH) in certain subframes. SSB can be sent up to 64 times, for example, for mmW, with up to 64 different beam directions. Multiple transmissions of SSB are called SS burst sets. SSBs in an SS burst set can be sent in the same frequency domain, while SSBs in different SS burst sets can be sent in different frequency domains.

[0076] like Figure 7 As shown, SSBs can be organized into SS burst sets to support beam scanning. As shown in the figure, each SSB in the burst set can be transmitted using a different beam, which can help the UE quickly acquire both the transmit (TX) beam and the receive (RX) beam simultaneously (especially for mmW applications). The physical cell identity (PCI) can be decoded from the PSS and SSS of the SSB.

[0077] Some deployment scenarios may include one or both NR deployment options. Some may be configured for non-standalone (NSA) and / or standalone (SA) options. Standalone cells may need to broadcast both SSBs and RMSI, for example, using two SIBs (e.g., SIB1 and SIB2). Non-standalone cells may only need to broadcast SSBs without broadcasting RMSI. In a single carrier of NR, multiple SSBs may be sent on different frequencies and may include different types of SSBs.

[0078] In some cases, two or more slave entities (e.g., UEs) can communicate with each other using sidelink signals. Practical applications of such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical grids, and / or various other suitable applications. Generally, a sidelink signal can refer to a signal that is transmitted from one slave entity (e.g., UE1) to another slave entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even though the scheduling entity may be used for scheduling and / or control purposes. In some examples, licensed spectrum can be used to transmit sidelink signals (unlike wireless local area networks that typically use unlicensed spectrum).

[0079] The UE may operate in various radio resource configurations, including a configuration associated with sending pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc.) or a configuration associated with sending pilots using a common set of resources (e.g., an RRC common state, etc.). When operating in the RRC dedicated state, the UE may select a dedicated set of resources for sending pilot signals to the network. When operating in the RRC common state, the UE may select a common set of resources for sending pilot signals to the network. In either case, the pilot signals sent by the UE may be received by one or more network access devices (such as an AN or DU) or a portion thereof. Each receiving network access device may be configured to receive and measure pilot signals sent on the common set of resources, and also receive and measure pilot signals sent on the dedicated set of resources allocated to the UE, the network access device being a member of a monitoring set of network access devices for the UE. The receiving network access device or one or more of the CUs receiving measurements of the pilot signals to which the network access device sends the pilot signals may use these measurements to identify the serving cell of the UE, or to initiate a change of one or more serving cells of the UE.

[0080] Quasi-co-location (QCL) port and transmission configuration indicator (TCI) status

[0081] In many cases, it may be important for a user equipment (UE) to know which assumptions it can make about the channels corresponding to different transmissions. For example, the UE may need to know which reference signals it can use to estimate the channel in order to decode the transmitted signal (e.g., the physical downlink control channel (PDCCH) or the physical downlink shared channel (PDSCH)). It may also be important for the UE to be able to report relevant channel state information (CSI) to the base station (BS) (or gNB) for scheduling, link adaptation, and / or beam management purposes. In New Radio (NR), the concepts of quasi co-location (QCL) and transmission configuration indicator (TCI) status can be used to convey information about these assumptions.

[0082] The QCL assumption can be defined based on channel properties. According to the 3rd Generation Partnership Project (3GPP) Technical Specification (TS) 38.214, "Two antenna ports are said to be quasi co-located if the properties of the channel over which the symbols on one antenna port are transmitted can be inferred from the channel over which the symbols on the other antenna port are transmitted." Different reference signals can be considered to be quasi co-located ("QCL'd") if a receiver (e.g., UE) can apply the channel properties determined by detecting the first reference signal (RS) to help detect the second RS. The TCI state typically includes configurations such as the QCL relationship, for example, the QCL relationship between the downlink (DL) RS and the PDSCH demodulation reference signal (DMRS) ports in one CSI-RS set.

[0083] In some cases, a UE can be configured with up to M TCI states. The configuration of the M TCI states can be achieved through higher layer signaling, and the UE can be signaled to decode the PDSCH based on the detected PDCCH with downlink control information (DCI) indicating one of the TCI states. Each configured TCI state can include an RS set TCIRS-SetConfig, which indicates different QCL assumptions between certain source and target signals.

[0084] Figure 8 Example QCL relationships according to certain aspects of the present disclosure are illustrated. More specifically, Figure 8 An example of associating a DL RS with a corresponding QCL type that can be indicated by TCI-RS-SetConFIG is illustrated.

[0085] exist Figure 8 In the example of , the source RS may be indicated in the top box and may be associated with the target signal indicated in the bottom box. In this context, the target signal may refer to a signal whose channel properties may be inferred by measuring those of the associated source signal. As described above, the UE may use the source RS to determine various channel parameters, depending on the associated QCL type. Furthermore, the UE may use these various channel parameters (determined based on the source RS) to process the target signal. The target RS does not necessarily need to be the DMRS of the PDSCH, but may be any other RS: physical uplink shared channel (PUSCH) DMRS, CSI-RS, tracking reference signal (TRS), and sounding reference signal (SRS).

[0086] As shown in the figure, each TCI-RS-SetConfig can contain parameters. For example, these parameters can configure the QCL relationship between the RSs in the RS set and the DMRS port group of the PDSCH. The RS set can contain references to one or two DL RSs and the associated QCL-Type for each configured by the higher-level parameter QCL-Type.

[0087] like Figure 8 As shown, for the case of two DL RSs, the QCL type can adopt multiple settings. For example, the QCL type can be different regardless of whether the reference is to the same DL RS or different DL RSs. In the example shown, the SSB can be associated with a C-type QCL for the phase tracking reference signal (P-TRS), while the CSI-RS for beam management (CSIRS-BM) can be associated with a D-type QCL.

[0088] In some scenarios, the QCL information and / or type may depend on or be a function of other information. For example, the QCL type indicated to the UE may be based on the higher layer parameter QCL-Type and may be one or a combination of the following types:

[0089] QCL-TypeA: {Doppler shift, Doppler spread, average delay, delay spread},

[0090] QCL-TypeB: {Doppler shift, Doppler spread},

[0091] QCL-TypeC: {average delay, Doppler shift}, and

[0092] QCL-TypeD: {spatial reception (RX) parameters},

[0093] The spatial QCL assumption (QCL-Type D) can be used to help the UE select a simulated receive (RX) beam (e.g., during the beam management process). For example, the SSB resource indicator can indicate that the same beam used for the previous RS should be used for subsequent transmissions.

[0094] The initial CORESET in a NR (e.g., CORESET ID 0 or simply CORESET#0) can be identified during the initial access of the UE (e.g., via a field in the MIB). The ControlResourceSet Information Element (CORESET IE) sent via Radio Resource Control (RRC) signaling can convey information about the CORESET configured for the UE. The CORESET IE can include the CORESET ID, an indication of the frequency domain resources allocated to the CORESET (e.g., the number of RBs), the continuous duration of the CORESET in multiple symbols, and the TCI state.

[0095] As described above, a subset of TCI states can provide the QCL relationship between (multiple) DL RSs and PDCCH DMRS ports in an RS set (e.g., TCI-Set). The specific TCI state for a given UE (e.g., unicast PDCCH) can be communicated to the UE via a media access control (MAC) control element (MACCE). The specific TCI state can be selected from a set of TCI states communicated via the CORESET IE, where the initial CORESET (CORESET#0) is typically configured via the MIB.

[0096] Search space information can also be provided via RRC signaling. For example, the Search Space IE can be another RRC IE that defines how and where to search for PDCCH candidates for a given CORESET. Each search space can be associated with a CORESET. The Search Space IE can identify the search space configured for the CORESET by the Search Space ID. In one aspect, the Search Space ID associated with CORESET#0 can be Search Space ID#0. The search space can be configured via PBCH (MIB).

[0097] Example Beam Management Process

[0098] Figure 9 An example beam management process according to certain aspects of the present disclosure is illustrated. Figure 9 As shown, the beam management process can be divided into three stages: P1 process, P2 process and P3 process. In 5G New Radio (NR), the beam management process for determining beam pair link (BPL) can be referred to as P1 process. Base station (BS) 910 (e.g., such as Figure 1 and / or Figure 4 BS 110a in the embodiment may provide a user equipment (UE) 920 (e.g., such as Figure 1 and / or Figure 4 120a in the BS 910) sends a measurement request, and may subsequently send one or more signals (sometimes referred to as "P1 signals") to the UE 920 for measurement. In the P1 process 902, the BS 910 may send a signal with beamforming in different spatial directions (corresponding to transmit beams 911, 912, ..., 917) in each symbol so as to reach several (e.g., most or all) relevant spatial locations of the cell of the BS 910. In this way, the BS 910 may send signals using different transmit beams in different directions over time. In some examples, a synchronization signal block (SSB) may be used as the P1 signal. In some examples, a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), or another downlink (DL) signal may be used as the P1 signal.

[0099] In the P1 process 902, in order to successfully receive at least one codeword of the P1 signal, the UE 920 can find (e.g., determine / select) an appropriate receive beam (921, 922, ..., 926). For a given signal index (e.g., SSB index) corresponding to a given time period, signals (e.g., SSBs) from multiple BSs can be measured simultaneously. The UE 920 can apply a different receive beam during each occurrence of the P1 signal (e.g., each codeword). Once the UE 920 successfully receives the codeword of the P1 signal, the UE 920 and the BS 910 may have discovered the BPL (i.e., the UE receive (RX) beam is used to receive the P1 signal in the codeword and the BS transmit (TX) beam is used to transmit the P1 signal in the codeword). In some cases, the UE 920 does not search all possible UE RX beams until it finds the best UE RX beam, as this will cause additional delay. Conversely, once an RX beam is "good enough," e.g., having a quality (e.g., signal-to-noise ratio (SNR) or signal-to-interference-plus-noise ratio (SINR)) that satisfies a threshold (e.g., a predefined threshold), the UE 920 may select the RX beam. The UE 920 may not know which beam the BS 910 used to transmit the P1 signal in a symbol; however, the UE 920 may report to the BS 910 the time at which it observed the signal. For example, the UE 920 may report to the BS 910 the symbol index in which the P1 signal was successfully received. The BS 910 may receive the report and determine which BS Tx beam the BS 910 used at the indicated time. In some examples, the UE 920 may measure the signal quality of the P1 signal, such as reference signal received power (RSRP) or another signal quality parameter (e.g., SNR, channel flatness, etc.). The UE 920 may report the measured signal quality (e.g., RSRP) along with the symbol index to the BS 910. In some cases, UE 920 may report multiple symbol indices corresponding to multiple BS TX beams to BS 910 .

[0100] As part of the beam management process, the BPL used between the UE 920 and the BS 910 may be improved / changed. For example, the BPL may be periodically improved to adapt to changing channel conditions, such as due to movement of the UE 920 or other objects, fading due to Doppler spread, etc. The UE 920 may monitor the quality of the BPL (e.g., the BPL found / selected in the P1 process and / or the previously improved BPL) to improve the BPL when the quality degrades (e.g., when the BPL quality drops below a threshold or when another BPL has higher quality). In 5G NR, the beam management process for BPL beam improvement may be referred to as the P2 and P3 processes to improve the BS beam and UE beam of individual BPLs, respectively.

[0101] like Figure 9 As shown, for P2 process 904, BS 910 may transmit symbols of signals with different BS beams (e.g., TX beams 915, 914, 913), which may be spatially close to the BS beam of the current BPL. For example, BS 910 may transmit signals in different symbols using adjacent TX beams around the TX beam of the current BPL (e.g., beam scanning). Figure 9 As shown, the TX beam used by BS 910 for P2 process 904 may be different from the TX beam used by BS 910 for P1 process 902. For example, the TX beam used by BS 910 for P2 process 904 may be spaced closer together and / or may be more focused (e.g., narrower) than the TX beam used by BS 910 for P1 process 902. During P2 process 904, UE 920 may maintain its RX beam (e.g., RX beam 924) constant. UE 920 may measure the signal quality (e.g., RSRP) of signals in different symbols and indicate the symbol with the highest measured signal quality. Based on this indication, BS 910 may determine the strongest (e.g., best, or associated with the highest signal quality) TX beam (i.e., the TX beam used in the indicated symbol). BPL may be modified accordingly to use the indicated TX beam.

[0102] like Figure 9 As shown, for P3 process 906, BS 920 may maintain a constant TX beam (e.g., the TX beam of the current BPL) and use the constant TX beam (e.g., TX beam 914) to transmit the codeword of the signal. During P3 process 906, UE 920 may use different RX beams (e.g., RX beams 923, 924, 925) to scan the signal in different codewords. For example, UE 920 may perform scanning using an RX beam adjacent to the RX beam in the current BPL (i.e., the BPL being improved). UE 920 may measure the signal quality (e.g., RSRP) of the signal in each RX beam and identify the strongest UE RX beam. UE 920 may use the identified RX beam for the BPL. UE 920 may report the signal quality to BS 910.

[0103] Example Connected Mode Discontinuous Reception (C-DRX) with Beamforming and Wake-up Signal (WUS)

[0104] Power saving techniques, such as a discontinuous reception (DRX) mode, may allow a wireless node, such as a user equipment (UE), to enter a low power mode for durations when the wireless node is not transmitting and / or receiving, and to exit the low power mode for durations when the wireless node is monitoring for transmissions and / or sending transmissions. More specifically, a power saving configuration may allow a wireless node to shut down one or more radio frequency (RF) components, including baseband processing components, RF RX front-end components (e.g., referred to as a receive (RX) chain), and RF TX front-end components (e.g., referred to as a transmit (TX) chain), when not in use to conserve power.

[0105] In order to achieve reasonable UE battery consumption, DRX operation in the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) is defined. The UE can be configured with a DRX function that controls the physical downlink control channel (PDCCH) monitoring activity of the UE. Two types of DRX procedures can be used in the Radio Resource Control (RRC) Idle (RRC_Idle) or RRC_Connected state. When DRX is used in the connected state, it is called connected mode DRX (C-DRX). C-DRX refers to a technology that allows the UE to discontinuously receive data in the connected state (RRC_Connected state) in which a radio connection has been established between the UE and a network entity (e.g., BS). C-DRX provides the beneficial effect of saving device power consumption; however, if the data is not received in a timely manner, the resulting packet delay may lead to packet loss, resulting in a decrease in service quality.

[0106] Figure 10 exemplifies C-DRX operations in which aspects of the present disclosure may be practiced. Figure 10 As shown, during periods of traffic inactivity, the UE may switch to C-DRX operation to save power. The UE may be configured for C-DRX according to various configuration parameters (such as an inactivity timer, a short DRX timer, a short DRX cycle, a long DRX cycle, etc.).

[0107] like Figure 10 As shown, when a UE is configured with C-DRX, the UE may cycle through an ON period (e.g., ON duration) and an OFF period (e.g., OFF duration) based on a configured period. When the UE is in the DRX ON duration, the UE may monitor PDCCH transmissions. When the UE is in the DRX OFF duration, the UE may remain in a low power (sleep) state for the remainder of the C-DRX cycle and stop monitoring transmissions (e.g., PDCCH on the access link). During the OFF duration, the UE may not be expected to transmit and / or receive any signals.

[0108] like Figure 10As shown, when PDCCH scheduled data is detected during the ON duration, the UE may wake up at the end of the previous C-DRX cycle and start a DRX inactivity timer indicating the duration that the UE should remain ON and monitor for transmissions. If another transmission is received, the UE may restart the DRX inactivity timer. Once the timer expires, the UE may re-enter the sleep state. If no PDCCH is detected during the ON duration, the UE may re-enter the sleep state at the end of the ON duration.

[0109] In some cases, beamforming can be combined with C-DRX to improve the likelihood of reaching the UE. While beamforming can enhance communications, it can also present challenges in doing so. For example, without beam tracking, a beam pair may degrade during one or more C-DRX OFF durations. The longer the C-DRX cycle, the more susceptible the transmission is to beam degradation. While shorter C-DRX cycles may be less prone to beam degradation, shorter cycles can suffer from power consumption penalties.

[0110] Figure 11 C-DRX with beamforming is illustrated in which aspects of the present disclosure may be practiced. Figure 11 As shown in Figure 2, due to the beam shift caused by the change of UE's direction or the mobility of the UE during the C-DRX OFF period, the UE may not be able to receive the PDCCH at the beginning of the next C-DRX ON duration and may not wake up. This may also be the case when there is beam blocking during the C-DRX OFF period, as shown in Figure 2. Figure 11 shown.

[0111] In some cases, a wake-up signal (WUS) can be used to extend the DRX OFF duration (for example, when the UE is operating in a low power (sleep) state). The techniques described herein can use the WUS to indicate to the UE whether an upcoming control channel signal resource includes information relevant to the UE. The WUS can be designed to allow the UE to detect with relatively simple low power processing. In this way, the UE can wake up more fully to perform complex control channel signal processing only when the control channel contains signals relevant to the UE, thereby saving the UE's battery power and resources. Configuring the WUS configuration in conjunction with the DRX configuration can add an additional power saving layer before each DRX ON duration. The general principles of WUS in C-DRX operation are illustrated in Figure 12A and Figure 12B middle.

[0112] Figure 12A and Figure 12BExample C-DRX with WUS configurations 1200A and 1200B is illustrated in which aspects of the present disclosure may be practiced. Figure 12A and Figure 12B As shown, in the time period before the C-DRX ON duration, only the wake-up subsystem can be turned on for WUS decoding (while the main modem is not turned on). The wake-up subsystem can be a low-complexity receiver (e.g., a simple correlator) that uses lower power than PDCCH decoding. WUS can be a special waveform, such as a special tone, a preamble, a reference signal (RS), etc. In addition, there can be different types of WUS, such as RS-type WUS and PDCCH-type WUS. RS-type WUS can include RSs such as channel state information reference signal (CSI-RS), tracking reference signal (TRS), and demodulation reference signal (DMRS). In some cases, PDCCH-type WUS can use an existing downlink control information (DCI) format or a new compact DCI format.

[0113] WUS opportunities may occur (periodically) during the DRX OFF duration of the DRX configuration, and more specifically, a number of slots / symbols before the start of each DRX ON duration. Figure 12A As shown, if no WUS is detected during the monitoring period of the WUS opportunity, the UE may not monitor the PDCCH transmission in the DRX ON state, but may remain in the low power state during the DRX ON duration of the DRX configuration (i.e., remain in the low power state until the next WUS opportunity). Alternatively, as Figure 12B As shown, if a WUS is detected during monitoring in a WUS opportunity, the UE may wake up the full modem during the next DRX ON duration.

[0114] WUS can be either group-specific or UE-specific. For example, with group-specific WUS, a group of UEs can share the same WUS and / or signaling opportunities. This approach can allow for lower network overhead, but at the expense of waking up some UEs even when there is no data. On the other hand, with UE-specific WUS, each UE can have a dedicated WUS and / or WUS signaling opportunity. While this approach may have greater network overhead (compared to group-specific WUS), it may be more flexible and efficient in terms of UE power saving.

[0115] In some cases where the C-DRX configuration is UE-specific, multiple UEs in a cell may share the same C-DRX configuration (e.g., C-DRX cycle and ON duration offset) in practice. Sharing the same C-DRX configuration may be beneficial from a network resource / power saving perspective.

[0116] For UEs sharing the same C-DRX configuration, the WUS can be UE-specific or a scrambled sequence. For example, for UE-specific WUS, each UE can be configured with a dedicated WUS (i.e., dedicated resources, sequence, format, scrambling, etc.). In addition, for a scrambled sequence WUS, a group of UEs can share the same WUS. Scrambling the WUS can help prevent other UEs in the group from waking up unnecessarily. The WUS may be targeted to only one UE, and only the targeted UE can decode the WUS. Regardless of whether the WUS is UE-specific or a scrambled sequence, each UE can perform WUS detection within the allocated WUS resources.

[0117] Example wake-up beam management for New Radio (NR) lighting devices

[0118] The techniques presented herein can be used in certain candidate traffic scenarios, for example, involving devices with reduced capabilities (e.g., New Radio (NR) lighting devices). Such devices can include those used in industrial wireless sensors, video surveillance, and smart wearables. Traffic from such devices can typically be uplink (UL)-heavy (relative to downlink (DL)), sparse, and aperiodic. For example, a motion-detection-based surveillance camera might only occasionally transmit a video burst and remain idle most of the time. Furthermore, data might be sent in relatively small payload bursts.

[0119] Such a reduced capability UE can remain in CONNECTED mode to maintain UL transmission resources (e.g., Physical Uplink Control Channel (PUCCH) / Physical Uplink Shared Channel (PUSCH) / Sounding Reference Signal (SRS) configuration) instead of frequently switching between CONNECTED mode and IDLE / INACTIVE mode, which may consume more power due to reconfiguration and release of resources. In this case, a very large value can be configured for the data activity timer to save power.

[0120] Although semi-persistent scheduling (SPS) can be used for DL ​​transmissions, the UE may still need to monitor the Physical Downlink Control Channel (PDCCH) transmission for other non-periodic DL traffic or control (e.g., SPS activation / deactivation, paging short messages, etc.). As mentioned above, in some cases, a very long DRX cycle can be configured for the UE to save power.

[0121] In addition, due to fixed applications in many reduced-capability UE scenarios (e.g., low or no device mobility) and small payload sizes (e.g., low data rates), link measurement / link adaptation (LA) resource overhead can be minimized. For example, active closed-loop LA (e.g., through persistent / semi-persistent channel state information reference signals (P / SP-CSI-RS) or SRS) may not be required. More specifically, only synchronization signal blocks (SSBs), aperiodic CSI-RS (A-CSI-RS) / SRS, or outer-loop-based link / beam adaptation can be used. In such scenarios, the time alignment timer can also be set to a very large value (e.g., 10.24 seconds or infinity).

[0122] Aspects of the present disclosure provide techniques that may help reduced capability UEs (e.g., NR lighting devices) detect WUS and perform SSB-based beam management for WUS monitoring. During DRX operation, the reduced capability UE may continue to measure one or more SSBs (e.g., outside of active time (e.g., ON duration when PDCCH is detected and the ON duration timer is started)). Based on the periodic reporting configuration, the UE may report the SSB index and the corresponding Layer 1 reference signal received power (L1-RSRP) during active time or during the duration indicated by the DRX ON duration timer, even when the ON duration timer is not started. In some cases, the UE may receive a medium access control (MAC) control element (CE) for WUS control resource set (CORESET) transmission configuration indicator (TCI) update and tracking reference signal (TRS) reconfiguration, where the TRS is used as a quasi co-location (QCL) reference.

[0123] Due to the limited resources available for beam management in the aforementioned reduced-capability UE scenario, beam failures may occur outside of active hours. In this case, beam failure detection (BFD) and beam failure recovery (BFR) may not proceed in a timely manner. As a result, the UE may not be able to receive WUS until the BFD and BFR procedures are completed. Due to the high probability of beam failures and BFD / BFR being delayed, performance and user experience may be affected.

[0124] Aspects of the present disclosure provide techniques that may assist a UE in determining which resources and beams to use when monitoring a WUS, for example, based on an association between an SSB and a beam used for WUS transmission.

[0125] Figure 13 1 is a flow diagram illustrating example operations 1300 for wireless communication by a UE. Operations 1300 may be performed, for example, by a UE (e.g., Figure 1 or Figure 4Operation 1300 may be implemented as a process in one or more processors (e.g., Figure 4 In addition, in operation 1300, the signals sent and received by the UE may be transmitted, for example, through one or more antennas (e.g., Figure 4 In some aspects, the signal may be transmitted via one or more processors (e.g., Figure 4 The bus interface of the controller / processor 480) implements signal transmission and / or reception by the BS.

[0126] Operations 1300 begin in block 1302 with the UE measuring one or more SSBs transmitted from a network entity. In block 1304, the UE determines one or more WUS opportunities and receive (RX) beams to monitor based on the SSB measurements. In block 1306, the UE decides to wake up for an ON duration if a WUS is detected in one of the monitored opportunities.

[0127] Figure 14 is a flow diagram illustrating example operations 1400 for wireless communication by a network entity. Operations 1400 may be considered to be Figure 13 The operations 1300 are in addition to the operations 1300 and may be performed, for example, by a BS / gNB (e.g., Figure 1 or Figure 4 110) to send a WUS to the UE (that performs operation 1300). Operation 1400 may be implemented as a process performed by one or more processors (e.g., Figure 4 In addition, in operation 1400, the signals sent and received by the network entity may be transmitted, for example, via one or more antennas (e.g., Figure 4 In some aspects, the signal may be transmitted via one or more processors (e.g., Figure 4 The bus interface of the controller / processor 440) is used to implement the sending and / or receiving of signals by the network entity.

[0128] Operations 1400 begin in block 1402 with a network entity transmitting an SSB to a user equipment (UE). In block 1404, the network entity determines one or more WUS opportunities and a transmit (TX) beam for transmitting a WUS based on an association with the SSB. In block 1406, the network entity transmits one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0129] You can refer to Figure 15 Figure 1500 to understand Figure 13 and Figure 14 1300 and 1400 , diagram 1500 illustrates wake-up beam management for a reduced-capability UE (e.g., an NR optical device). Figure 15 is a call flow diagram 1500 illustrating example SSB-based beam management for WUS monitoring in accordance with certain aspects of the present disclosure. Figure 15 The illustrated UE 120 may be configured with a C-DRX function, thereby enabling the UE 120 to discontinuously receive data in a connected state (RRC_Connected state) in which a radio connection is established between the UE 120 and a network entity 110 (eg, a BS).

[0130] According to various aspects of the present disclosure, a wake-up beam may be associated with a corresponding SSB. Similar beam scanning principles are used for paging messages in 5G networks, and beam scanning may be applied to WUS transmissions. In this case, the QCL assumption (e.g., QCL assumptions of type A, B, C, and / or D) of the wake-up control resource set (WU-CORESET) may be determined based on the association with the SSB, rather than the configured TCI state. The UE may be configured with candidate WUS opportunities, each of which is associated with an SSB.

[0131] like Figure 15 As shown, at 1502, the network entity 110 may configure the UE 120 with a WUS configuration indicating a set of candidate WUS opportunities. Each WUS opportunity may be associated with an SSB.

[0132] The number of configured WUS opportunities may depend on the number of SSBs (e.g., may be as high as the number of SSBs). In some cases, WUS opportunities may be frequency division multiplexed (FDMed) with the associated SSBs (e.g., similar to the remaining minimum system information CORESET monitoring mode 3 in 5G networks).

[0133] At 1504, the network entity 110 may send the SSB (associated with the WUS opportunity) to the UE 120, and at 1506, the UE 120 may measure the received SSB. Given the QCL assumption and the association of the SSB with the WUS opportunity, based on the SSB measurement, at 1508, the UE 120 may determine one or more appropriate WUS opportunities (and one or more RX beams) to monitor among the configured candidate WUS opportunities.

[0134] In some cases, the network entity 110 may scan for WUS on all configured WUS opportunities of the UE 120 or a subset of the configured WUS opportunities using corresponding beams (e.g., corresponding beams used for associated SSB transmissions). Accordingly, also at 1508, the network entity 110 may determine one or more WUS opportunities and TX beams for transmitting one or more WUSs to the UE 120 based on the association of the SSBs with the WUS opportunities. Depending on the embodiment, the network entity may choose to use only a subset of the WUS opportunities. For example, the network entity may determine how many and which beams to transmit the WUS based on previously measured or reported link quality of the UE (e.g., during the most recent active time).

[0135] At 1510, the network entity 110 may scan for one or more WUSs in one or more WUS occasions using the determined TX beam. At 1512, the UE 120 may monitor for one or more WUSs in one or more WUS occasions using the determined RX beam.

[0136] In case UE 120 detects WUS (in at least one monitored WUS opportunity), UE 120 may continue to wake up in the next DRX ON duration.

[0137] In addition, the one or more WUSs may include at least one field that triggers at least one UL transmission from the UE. At 1514, UE 120 may determine one or more UL transmission opportunities based on the one or more WUS opportunities in which the WUSs were detected. Also at 1514, the network entity may determine one or more UL transmission opportunities to monitor based on the one or more WUS opportunities in which the one or more WUSs were sent by network entity 110.

[0138] At 1516, UE 120 may send one or more UL transmissions in the one or more UL transmission opportunities. At 1518, network entity 110 may monitor one or more UL transmissions in the one or more UL transmission opportunities.

[0139] Upon detecting the UL transmission, the network entity 110 may estimate the UL timing and select a DL beam for serving the DL traffic during the DRX ON duration at 1520. At 1522, the UE 120 may wake up to communicate (because the UE 120 detected one or more WUSs in one or more WUS opportunities), and at 1524, the UE 120 and the network entity 110 may communicate during the DRX ON duration (e.g., active time).

[0140] Figure 16 and Figure 17An example of associating SSBs with resources for UL transmission according to aspects of the present disclosure is illustrated.

[0141] like Figure 16 As shown, in some cases, WUS can be used as a "group" PDCCH order, which triggers a group of UEs receiving the WUS to send a random access channel (RACH) transmission on the indicated RACH opportunity. In this case, a field in the WUS (e.g., a UE-specific field or some other type of field) can trigger a contention-free RACH transmission opportunity. Figure 16 As shown in , each RACH opportunity can be associated with a WUS opportunity (and therefore also with an SSB). Figure 16 A one-to-one mapping is shown in FIG (for SSB to WUS occasions, and WUS occasions to RACH occasions), but in other cases a one-to-many mapping or a many-to-one mapping may be used (to save resources).

[0142] Upon detecting the RACH preamble sent on a RACH opportunity, the network entity (e.g., BS) can estimate the UL timing and select a DL beam to serve DL traffic during the active time (DRX ON duration). In some cases, one-to-many mapping can allow multiple RACH opportunities with repetition or power ramping.

[0143] In some cases, when a UE detects multiple WUSs in different configured WUS opportunities, the UE may transmit multiple RACHs on multiple associated RACH opportunities. In this case, the maximum number of RACHs may be configurable. In some cases, the maximum number of RACHs may be related to the number of different DL beams that can be used during the active time.

[0144] like Figure 17 As shown in , as an alternative to or in addition to RACH transmissions, the UE may transmit one or more SRSs on one or more of the configured SRS opportunities. In some cases, the WUS may serve as an aperiodic SRS (A-SRS) trigger. In some cases, multiple SRS ports may indicate the maximum rank of the selected beam that the UE prefers. The UE may derive this preferred rank, for example, from SSB measurements. The network entity may determine the number of ports through blind decoding, thereby inferring the maximum rank preferred by the UE.

[0145] In some cases, the UE may also transmit other UL signals as an alternative or in addition to RACH and / or SRS transmissions. Examples of such UL signals may include PUCCH or PUSCH (e.g., PUSCH resources granted via configuration). In this case, the PUCCH and / or PUSCH payload may include CSI feedback (e.g., including a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), etc.) derived by the UE from SSB measurements.

[0146] Example Wireless Communication Device

[0147] Figure 18 A communication device 1800 is illustrated, which may include devices configured to perform operations for the techniques disclosed herein (e.g., Figure 13 Various components (eg, corresponding to means plus function components) of the operations shown.

[0148] The communication device 1800 includes a processing system 1802 coupled to a transceiver 1808 (e.g., a transmitter and / or receiver). The transceiver 1808 is configured to transmit and receive signals for the communication device 1800, such as the various signals described herein, via an antenna 1810. The processing system 1802 may be configured to perform processing functions for the communication device 1800, including processing signals received by the communication device 1800 and / or to be transmitted by the communication device.

[0149] The processing system 1802 includes a processor 1804 coupled to a computer-readable medium / memory 1812 via a bus 1806. In some aspects, the computer-readable medium / memory 1812 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1804, cause the processor 1804 to perform Figure 13 The operations shown or other operations may be used to perform the various techniques discussed herein. In some cases, the processor 1804 may include reference Figure 4 One or more components of the UE 120, such as, for example, the controller / processor 480, the transmit processor 464, the receive processor 458, etc. In addition, in some cases, the computer readable medium 1812 may include reference Figure 4 One or more components of the UE 120, such as, for example, the memory 482.

[0150] In certain aspects, the computer readable medium / memory 1812 stores code for measuring 1814 ; code for determining 1816 ; and code for deciding 1818 .

[0151] In some cases, code for measuring 1814 may include code for measuring one or more synchronization signal blocks (SSBs) sent from a network entity.

[0152] In some cases, code 1816 for measuring may include code for determining one or more wake-up signal (WUS) opportunities and receive (RX) beams to monitor based on the SSB measurements.

[0153] In some cases, the code for measuring 1818 may include code for deciding to wake up for an ON duration if a WUS is detected in one of the monitored occasions.

[0154] In certain aspects, the processor 1804 has circuitry configured to execute code stored in the computer-readable medium / memory 1812. For example, the processor 1804 includes circuitry 1824 for measuring; circuitry 1826 for determining; and circuitry 1828 for deciding.

[0155] In some cases, the circuitry for measuring 1824 may include circuitry for measuring one or more synchronized SSBs sent from a network entity.

[0156] In some cases, the circuitry for measuring 1826 may include circuitry for determining one or more WUS opportunities and RX beams to monitor based on the SSB measurements.

[0157] In some cases, the circuitry for measuring 1828 may include circuitry for deciding to wake up for an ON duration if a WUS is detected in one of the monitored occasions.

[0158] In some cases, Figure 13 The operations shown in and other operations described herein may be implemented by one or more means-plus-function components. For example, in some cases, such operations may be implemented by means of means for measuring, means for determining, and means for deciding.

[0159] In some cases, the means for measuring, the means for determining, and the means for deciding comprise a processing system that may include one or more processors, such as a receive processor 458, a transmit processor 464, a TX MIMO processor 466, and / or Figure 4 The controller / processor 480 and / or Figure 18 The processing system 1802 of the communication device 1800 in FIG.

[0160] Figure 19A communication device 1900 is illustrated, which may include devices configured to perform operations for the techniques disclosed herein (e.g., Figure 14 Various components (eg, corresponding to means plus function components) of the operations shown.

[0161] The communication device 1900 includes a processing system 1902 coupled to a transceiver 1908 (e.g., a transmitter and / or receiver). The transceiver 1908 is configured to transmit and receive signals for the communication device 1900, such as the various signals described herein, via an antenna 1910. The processing system 1902 may be configured to perform processing functions for the communication device 1900, including processing signals received by the communication device 1900 and / or to be transmitted by the communication device.

[0162] The processing system 1902 includes a processor 1904 coupled to a computer-readable medium / memory 1912 via a bus 1906. In some aspects, the computer-readable medium / memory 1912 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1904, cause the processor 1904 to perform Figure 14 The operations shown or other operations may be used to perform the various techniques discussed herein. In some cases, the processor 1904 may include reference Figure 4 One or more components of the BS 110, such as, for example, the controller / processor 440, the transmit processor 420, the receive processor 438, etc. Additionally, in some cases, the computer-readable medium / memory 1412 may include reference to Figure 4 One or more components of BS 110, such as, for example, memory 442.

[0163] In certain aspects, the computer readable medium / memory 1912 stores code for transmitting 1914 ; code for determining 1916 ; and code for transmitting 1918 .

[0164] In some cases, code for transmitting 1914 may include code for transmitting an SSB to the UE.

[0165] In some cases, code for determining 1916 may include code for determining one or more WUS opportunities and transmit (TX) beams for transmitting a WUS based on SSB measurements.

[0166] In some cases, code for transmitting 1918 may include code for transmitting a WUS in one or more WUS opportunities using the determined TX beam.

[0167] In some aspects, the processor 1904 has circuitry configured to implement code stored in the computer-readable medium / memory 1912. For example, the processor 1904 includes circuitry for transmitting 1924; circuitry for determining 1926; and circuitry for transmitting 1928.

[0168] In some cases, the circuitry for transmitting 1924 may include circuitry for transmitting SSB to the UE.

[0169] In some cases, the circuitry for determining 1926 may include circuitry for determining one or more WUS opportunities and TX beams for transmitting a WUS based on SSB measurements.

[0170] In some cases, the circuitry for transmitting 1928 may include circuitry for transmitting the WUS in one or more WUS opportunities using the determined TX beam.

[0171] In some cases, Figure 14 The operations shown in and other operations described herein may be implemented by one or more components plus function components. For example, in some cases, such operations may be implemented by components for sending (or components for outputting transmission) and components for determining.

[0172] In some cases, means for transmitting (or means for outputting for transmission) includes a transmitter and / or antenna 434 or Figure 4 BS110 and / or Figure 19 19. Circuits 1924 and 1928 of communication device 1900 for transmitting.

[0173] In some cases, the means for determining includes a processing system that may include one or more processors, such as receive processor 438, transmit processor 420, TX MIMO processor 430, and / or Figure 4 The controller / processor 440 of the BS 110 and / or Figure 19 The processing system 1902 of the communication device 1900 in FIG.

[0174] Sample Clauses

[0175] Examples of implementation are described in the following numbered clauses:

[0176] Clause 1: A method of wireless communication by a user equipment (UE), comprising: measuring one or more synchronization signal blocks (SSBs) sent from a network entity; determining one or more wake-up signal (WUS) opportunities and receive (RX) beams to monitor based on the SSB measurements; and deciding to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0177] Clause 2: The method of clause 1, wherein the one or more WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

[0178] Clause 3: The method of clause 1 or 2, further comprising determining quasi co-location (QCL) information of a control resource set (CORESET) of the WUS opportunity based on an association with the SSB.

[0179] Clause 4: A method as set forth in any of clauses 1-3, wherein the UE is configured with a set of candidate WUS opportunities, each candidate WUS opportunity being associated with an SSB, and the UE selects one or more of the candidate WUS opportunities to monitor based on the SSB measurement.

[0180] Clause 5: A method as set forth in any of clauses 1-4, further comprising detecting, in one of the WUS opportunities, a WUS having at least one field that triggers at least one uplink (UL) transmission from the UE.

[0181] Clause 6: The method of clause 5, wherein the UL transmission comprises a random access channel (RACH) transmission, and the UE determines at least one RACH opportunity for the RACH transmission based on an association with the WUS opportunity.

[0182] Clause 7: The method of clause 6, wherein the at least one RACH opportunity comprises a plurality of RACH opportunities for at least one of repetition or power ramping.

[0183] Clause 8: A method according to clause 6 or 7, wherein the UE detects multiple WUSs in different WUS occasions and sends multiple RACH transmissions in multiple RACH occasions.

[0184] Clause 9: A method according to any one of clauses 5-8, wherein when the UL transmission includes one or more sounding reference signal (SRS) transmissions, the UE detects one or more WUS in different WUS occasions, determines one or more SRS occasions for the one or more SRS transmissions based on an association with the one or more WUS occasions, and sends the one or more SRS transmissions in the one or more SRS occasions.

[0185] Clause 10: A method according to any of clauses 5-9, wherein when the UL transmission includes one or more physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) transmissions, the UE detects one or more WUS in different WUS opportunities, determines one or more PUCCH opportunities or one or more PUSCH opportunities for the one or more PUCCH or PUSCH transmissions based on the association with the WUS opportunity, and sends the one or more PUCCH or PUSCH transmissions in the one or more PUCCH or PUSCH opportunities.

[0186] Clause 11: The method of clause 10, further comprising determining channel state information (CSI) based on the SSB measurement and reporting the CSI via a payload of the PUCCH or PUSCH.

[0187] Clause 12: The method of any of clauses 9-11, further comprising determining a preferred maximum rank based on the SSB measurement and providing an indication of the preferred maximum rank based on a number of SRS ports used for the one or more SRS transmissions.

[0188] Clause 13: A method of wireless communication by a network entity, comprising: sending a synchronization signal block (SSB) to a user equipment (UE), determining one or more wake-up signal (WUS) opportunities and transmit (TX) beams for sending one or more WUSs based on an association with the SSB, and sending the one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0189] Clause 14: The method of clause 13, wherein the one or more WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

[0190] Clause 15: The method of clause 13 or 14, further comprising determining quasi co-location (QCL) information of a control resource set (CORESET) of the WUS opportunity based on an association with the SSB.

[0191] Clause 16: A method according to any of clauses 13-15, further comprising configuring a set of candidate WUS opportunities for the UE, each candidate WUS opportunity being associated with an SSB, and sending a WUS to the UE on one or more of the candidate WUS opportunities.

[0192] Clause 17: The method of any of clauses 13-16, wherein the network entity scans the one or more WUSs using corresponding beams over all configured WUS occasions or a subset of the configured WUS occasions.

[0193] Clause 18: The method of clause 17, wherein the network entity selects how many beams and on which beams to transmit the one or more WUSs based on previously measured link quality of the UE.

[0194] Clause 19: A method as set out in any of clauses 13-18, wherein the transmitted one or more WUSs have at least one UE-specific field that triggers at least one uplink (UL) transmission from the UE.

[0195] Clause 20: The method of clause 19, wherein the UL transmission comprises a random access channel (RACH) transmission, and the network entity determines at least one RACH opportunity to monitor for the RACH transmission based on an association with the WUS opportunity.

[0196] Clause 21: The method of clause 20, wherein the at least one RACH opportunity comprises a plurality of RACH opportunities for at least one of repetition or power ramping.

[0197] Clause 22: A method as set out in any of clauses 19-21, wherein the network entity sends a plurality of WUSs in different WUS occasions and monitors a plurality of RACH occasions for RACH transmissions from the UE.

[0198] Clause 23: A method according to any one of clauses 19-22, wherein the UL transmission includes one or more sounding reference signal (SRS) transmissions, the network entity determines one or more SRS opportunities for monitoring the one or more SRS transmissions based on an association with the one or more WUS opportunities, and monitors the one or more SRS transmissions in the one or more SRS opportunities.

[0199] Clause 24: A method according to any one of clauses 19-23, wherein the UL transmission includes one or more physical uplink control channel (PUCCH) transmissions or one or more physical uplink shared channel (PUSCH) transmissions, and the network entity determines one or more PUCCH or PUSCH opportunities for monitoring the one or more PUCCH or PUSCH transmissions based on the association with the one or more WUS opportunities, and monitors the one or more PUCCH or PUSCH transmissions in the one or more PUCCH or PUSCH opportunities.

[0200] Clause 25: The method of clause 24, further comprising receiving a report of channel state information (CSI) based on SSB measurements from the UE via a payload of the PUCCH or PUSCH.

[0201] Clause 26: The method of any of clauses 23-25, further comprising determining a preferred maximum rank based on SSB measurements and providing an indication of the preferred maximum rank based on a number of SRS ports used for the one or more SRS transmissions.

[0202] Clause 27: An apparatus for wireless communication by a user equipment (UE), comprising a receiver and at least one processor, the receiver configured to measure one or more synchronization signal blocks (SSBs) sent from a network entity, the at least one processor configured to determine one or more wake-up signal (WUS) opportunities and receive (RX) beams to monitor based on the SSB measurements, and to decide to wake up for an ON duration when a WUS is detected in one of the WUS opportunities.

[0203] Clause 28: The apparatus of clause 27, wherein the one or more WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

[0204] Clause 29: An apparatus for wireless communication by a network entity, comprising a transmitter and at least one processor, the transmitter configured to send a synchronization signal block (SSB) to a user equipment (UE), the at least one processor configured to determine one or more wake-up signal (WUS) opportunities and transmit (TX) beams for sending one or more WUSs based on an association with the SSB, wherein the transmitter is further configured to send one or more WUSs in one or more of the WUS opportunities using the determined TX beam.

[0205] Clause 30: The apparatus of clause 29, wherein the one or more WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

[0206] Additional Notes

[0207] The foregoing description provides examples of wake-up beam management. Changes may be made to the functionality and arrangement of the elements discussed without departing from the scope of the present disclosure. Various examples may omit, substitute, or add various processes or components as appropriate. For example, the method may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of aspects set forth herein. In addition, the scope of the present disclosure is intended to cover apparatuses or methods that are practiced using other structures, functions, or structures and functions in addition to or in addition to the various aspects of the disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of the claims. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

[0208] The techniques described herein can be used for various wireless communication technologies such as 5G (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are generally used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS).

[0209] LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). NR is an emerging wireless communication technology under development.

[0210] NR access (e.g., 5G technology) can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) for wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) for high carrier frequency (e.g., 25 GHz or higher), massive machine type communication MTC (mMTC) for non-backward compatible MTC technology, and / or mission-critical ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0211] The method disclosed herein includes one or more steps or actions for implementing the method. Without departing from the scope of the claims, the method steps and / or actions can be interchangeable with each other. In other words, unless a specific order of steps or actions is specified, the order and / or use of the specific steps and / or actions can be modified without departing from the scope of the claims.

[0212] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. For example, "at least one of a, b, or c" is intended to encompass a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0213] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or another data structure), ascertaining, etc. Furthermore, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. Furthermore, "determine" may include resolving, selecting, choosing, establishing, etc.

[0214] The previous description is provided to enable anyone skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects presented herein, but should be given the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically stated otherwise, but rather "one or more." Unless otherwise specifically stated, the term "some" refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or later known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Moreover, regardless of whether such disclosure is explicitly recited in the claims, nothing disclosed herein is intended to be exclusively published. No claim element shall be interpreted under 35 U.S.C. § 112(f) unless the element is expressly stated with the phrase "means for" or, in the case of a method claim, the element is stated with the phrase "step for."

[0215] The various operations of the above methods can be performed by any suitable components capable of performing the corresponding functions. The components may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where operations are illustrated in the accompanying drawings, those operations may have corresponding corresponding components plus functional components with similar numbers.

[0216] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration.

[0217] If implemented in hardware, an exemplary hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. The bus may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. Among other things, the bus interface may be used to connect a network adapter to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of a user terminal 120 (see Figure 1 ), a user interface (e.g., keyboard, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and will not be described in detail. The processor may be implemented using one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits that can execute software. Those skilled in the art will recognize how best to implement the described functionality for a processing system, depending on the specific application and the overall design constraints imposed on the entire system.

[0218] If implemented in software, the functionality may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Software should be broadly interpreted to refer to instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media includes both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one location to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be integrated with the processor. For example, the machine-readable medium may include a transmission line, a carrier wave modulated by data, and / or a computer-readable storage medium having instructions stored thereon, separate from the wireless node, all of which can be accessed by the processor via a bus interface. Alternatively, or in addition, the machine-readable medium or any portion thereof may be integrated into the processor, such as may be the case with a cache and / or general register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0219] A software module may include a single instruction or many instructions and may be distributed across several different code segments, between different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During execution of a software module, the processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When reference is made to the functions of a software module below, it should be understood that such functions are implemented by the processor when instructions from that software module are executed.

[0220] Additionally, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Optical disks, where magnetic disks typically reproduce data magnetically, and optical disks reproduce data optically using lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transitory computer-readable media (e.g., signals). Combinations of the above are also intended to be within the scope of computer-readable media.

[0221] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored thereon (and / or encoded thereon) instructions, the instructions being executable by one or more processors to perform the operations described herein. For example, a computer program product for performing the operations described herein and Figure 13 and / or Figure 14 The operation instructions are shown in .

[0222] In addition, it should be understood that the modules and / or other appropriate components for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or BS as appropriate. For example, such a device can be coupled to a server to facilitate the transfer of components for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage component (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.), so that the user terminal and / or BS can obtain the various methods after coupling the storage component to or providing it to the device. In addition, any other suitable technology for providing the methods and techniques described herein to the device can be utilized.

[0223] It is to be understood that the claims are not limited to the precise configuration and components shown above, and that various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: measuring one or more synchronization signal blocks (SSBs) sent from a network entity, wherein the UE is configured with a set of candidate wake-up signal (WUS) opportunities, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with the SSBs; Determining quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB instead of a configured transmission configuration indicator TCI state; determining one or more candidate WUS opportunities to be monitored and one or more receive RX beams to be monitored in the set of candidate WUS opportunities based on the QCL information and the SSB measurement; as well as It is decided to wake up for an ON duration when a WUS is detected in one of the set of candidate WUS opportunities. 2 . The method of claim 1 , wherein the one or more candidate WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

3. The method according to claim 1, further comprising: A WUS having at least one field triggering at least one uplink (UL) transmission from the UE is detected in one candidate WUS opportunity in the set of candidate WUS opportunities.

4. The method according to claim 3, wherein: The UL transmission includes a random access channel (RACH) transmission; and The UE determines at least one RACH opportunity for the RACH transmission based on the association with the candidate WUS opportunities.

5. The method of claim 4, wherein the at least one RACH opportunity comprises a plurality of RACH opportunities for at least one of repetition or power ramping.

6. The method according to claim 4, wherein the UE: detecting multiple WUS at different candidate WUS opportunities; and Multiple RACH transmissions are sent in multiple RACH opportunities.

7. The method of claim 3, wherein when the UL transmission includes one or more Sounding Reference Signal (SRS) transmissions, the UE: detecting one or more WUSs at different candidate WUS timings; determining one or more SRS opportunities for the one or more SRS transmissions based on an association with the one or more candidate WUS opportunities; and The one or more SRS transmissions are sent in the one or more SRS opportunities.

8. The method according to claim 3, wherein when the UL transmission includes one or more physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) transmissions, the UE: detecting one or more WUSs at different candidate WUS timings; determining one or more PUCCH opportunities or one or more PUSCH opportunities for the one or more PUCCH or PUSCH transmissions based on the association with the candidate WUS opportunities; and The one or more PUCCH or PUSCH transmissions are sent in the one or more PUCCH or PUSCH opportunities.

9. The method according to claim 8, further comprising: Determine channel state information (CSI) based on the SSB measurement; as well as The CSI is reported through a payload of the PUCCH or PUSCH.

10. The method according to claim 7, further comprising: determining a preferred maximum rank based on the SSB measurement; as well as The indication of the preferred maximum rank is provided based on a number of SRS ports used for the one or more SRS transmissions.

11. A method for wireless communication by a network entity, comprising: Configuring a set of candidate wake-up signal WUS opportunities for a user equipment UE, where each candidate WUS opportunity in the set of candidate WUS opportunities is associated with a synchronization signal block SSB; sending the SSB to the UE; determining one or more candidate WUS opportunities and transmit TX beams for transmitting one or more WUSs based on an association with the SSB; as well as transmitting the one or more WUSs to the UE in one or more candidate WUS opportunities in the set of candidate WUS opportunities using the determined TX beam, The method further comprises: Quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity is determined based on an association of the candidate WUS opportunity with the SSB rather than a configured transmission configuration indicator TCI state.

12. The method of claim 11, wherein the one or more candidate WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs. 13 . The method of claim 11 , wherein the network entity scans the one or more WUSs over all configured candidate WUS opportunities or a subset of configured candidate WUS opportunities using corresponding beams.

14. The method of claim 13, wherein the network entity selects how many beams and on which beams to transmit the one or more WUSs based on previously measured link quality of the UE.

15. The method of claim 11, wherein the transmitted one or more WUSs have at least one UE-specific field that triggers at least one uplink (UL) transmission from the UE.

16. The method according to claim 15, wherein: The UL transmission includes a random access channel (RACH) transmission; and The network entity determines at least one RACH opportunity for monitoring the RACH transmission based on the association with the candidate WUS opportunities.

17. The method of claim 16, wherein the at least one RACH opportunity comprises a plurality of RACH opportunities for at least one of repetition or power ramping.

18. The method of claim 15, wherein the network entity: sending multiple WUSs in different candidate WUS opportunities; and A plurality of RACH opportunities for RACH transmissions from the UE are monitored.

19. The method of claim 15, wherein: The UL transmission includes one or more sounding reference signal (SRS) transmissions; The network entity determines one or more SRS opportunities for monitoring the one or more SRS transmissions based on an association with the one or more candidate WUS opportunities; and The one or more SRS transmissions are monitored in the one or more SRS opportunities.

20. The method of claim 15, wherein: The UL transmission includes one or more physical uplink control channel PUCCH transmissions or one or more physical uplink shared channel PUSCH transmissions; The network entity determines one or more PUCCH or PUSCH opportunities for monitoring the one or more PUCCH or PUSCH transmissions based on an association with the one or more candidate WUS opportunities; as well as The one or more PUCCH or PUSCH transmissions are monitored in the one or more PUCCH or PUSCH opportunities.

21. The method according to claim 20, further comprising: A report of channel state information (CSI) based on SSB measurement is received from the UE through a payload of the PUCCH or PUSCH.

22. The method of claim 19, further comprising: Determining a preferred maximum rank based on the SSB measurement; as well as The indication of the preferred maximum rank is provided based on a number of SRS ports used for the one or more SRS transmissions.

23. An apparatus for wireless communication by a user equipment (UE), comprising: A receiver, the receiver being configured to: measuring one or more synchronization signal blocks (SSBs) sent from a network entity, wherein the UE is configured with a set of candidate wake-up signal (WUS) opportunities, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with the SSBs; as well as at least one processor configured to: Determining quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB instead of a configured transmission configuration indicator TCI state; determining one or more candidate WUS opportunities to be monitored and one or more receive RX beams to be monitored in the set of candidate WUS opportunities based on the QCL information and the SSB measurement; as well as It is decided to wake up for an ON duration when a WUS is detected in one of the set of candidate WUS opportunities.

24. The apparatus of claim 23, wherein the one or more candidate WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

25. An apparatus for wireless communication by a network entity, comprising: A transmitter, the transmitter being configured to: Sending a synchronization signal block SSB to a user equipment UE; as well as at least one processor configured to: Configuring a set of candidate wake-up signal WUS opportunities for the UE, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with the SSB; determining one or more candidate WUS opportunities and transmit TX beams for transmitting one or more WUSs based on an association with the SSB; wherein the transmitter is further configured to transmit the one or more WUSs to the UE in one or more candidate WUS opportunities in the set of candidate WUS opportunities using the determined TX beam, and The at least one processor is further configured to determine quasi co-located QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB rather than a configured transmission configuration indicator TCI state.

26. The apparatus of claim 25, wherein the one or more candidate WUS opportunities are frequency division multiplexed (FDMed) with one or more associated SSBs.

27. An apparatus for wireless communication by a user equipment (UE), comprising: means for measuring one or more synchronization signal blocks (SSBs) sent from a network entity, wherein the UE is configured with a set of candidate wake-up signal (WUS) opportunities, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with the SSB; A means for determining quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB instead of a configured transmission configuration indicator TCI state; means for determining one or more candidate WUS opportunities to monitor and one or more receive RX beams to monitor from the set of candidate WUS opportunities based on the QCL information and the SSB measurement; as well as Means for deciding to wake up for an ON duration when a WUS is detected in one of the candidate WUS opportunities in the set of candidate WUS opportunities.

28. An apparatus for wireless communication by a network entity, comprising: means for configuring a set of candidate wake-up signal WUS opportunities for a user equipment UE, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with a synchronization signal block SSB; means for sending the SSB to the UE; means for determining one or more candidate WUS opportunities for transmitting one or more WUSs and transmitting a TX beam based on an association with the SSB; as well as means for transmitting the one or more WUSs to the UE in one or more of the candidate WUS opportunities using the determined TX beam, The device further comprises: A means for determining quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB rather than a configured transmission configuration indicator TCI state.

29. A non-transitory computer-readable medium for wireless communication by a user equipment (UE), comprising computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to: measuring one or more synchronization signal blocks (SSBs) sent from a network entity, wherein the UE is configured with a set of candidate wake-up signal (WUS) opportunities, each candidate WUS opportunity in the set of candidate WUS opportunities being associated with the SSBs; Determining quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity based on an association of the candidate WUS opportunity with the SSB instead of a configured transmission configuration indicator TCI state; determining one or more candidate WUS opportunities to be monitored and one or more receive RX beams to be monitored in the set of candidate WUS opportunities based on the QCL information and the SSB measurement; as well as It is decided to wake up for an ON duration when a WUS is detected in one of the set of candidate WUS opportunities.

30. A non-transitory computer-readable medium for wireless communications by a network entity, comprising computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to: Configuring a set of candidate wake-up signal WUS opportunities for a user equipment UE, where each candidate WUS opportunity in the set of candidate WUS opportunities is associated with a synchronization signal block SSB; sending the SSB to the UE; determining one or more candidate WUS opportunities and transmit TX beams for transmitting one or more WUSs based on an association with the SSB; as well as transmitting the one or more WUSs to the UE in one or more candidate WUS opportunities in the set of candidate WUS opportunities using the determined TX beam, The computer-executable instructions, when executed by one or more processors of the processing system, further cause the processing system to: Quasi co-location QCL information of a control resource set CORESET of the candidate WUS opportunity is determined based on an association of the candidate WUS opportunity with the SSB rather than a configured transmission configuration indicator TCI state.

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