Wake-up beam management for connected mode discontinuous reception (C-DRX) operation

Abstract

Certain aspects of the present disclosure provide techniques for wake-up signal beam management.

Description

[0001] Priority claim under 35 U.S.C. § 119

[0002] This application claims priority to U.S. Application No. 16 / 517,196, filed on July 19, 2019, and the benefit of U.S. Provisional Patent Application No. 62 / 701,421, filed on July 20, 2018, all of which are assigned to the present assignee and are expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate to wireless communications, and more particularly to techniques for beam management of a wake-up signal transmitted before an on period of connected mode discontinuous reception (C-DRX). Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0005] In some examples, a wireless multiple access communication system may include multiple base stations (BS), each of which is capable of simultaneously supporting communication of multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation new radio (NR) or 5G network), a wireless multiple access communication system may include multiple distributed units (DU) (e.g., edge units (EU), edge nodes (EN), radio heads (RH), smart radio heads (SRH), transmit receive points (TRP), etc.) communicating with multiple central units (CU) (e.g., central nodes (CN), access node controllers (ANC), etc.), wherein a set of one or more distributed units communicating with the central unit may define an access node (e.g., which may be referred to as a base station, 5G NB, next generation NodeB (gNB or gNodeB), TRP, etc.). A base station or distributed unit may communicate with a set of UEs on a downlink channel (e.g., a transmission from a BS or to a UE) and an uplink channel (e.g., a transmission from a UE to a base station or distributed unit).

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at city, country, region, and even global levels. New Radio (NR) (e.g., 5G) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as the demand for mobile broadband access continues to increase, further improvements to NR and LTE technologies are needed. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that adopt these technologies. Summary of the invention

[0008] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description of the Invention," it will be understood how the features of the present disclosure provide advantages including improved communication between access points and stations in a wireless network.

[0009] Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes: monitoring at least one type of beam scanning wake-up signal sent from a network entity before an on period of a connected mode discontinuous reception (C-DRX) cycle; performing beam measurements of the beam scanning wake-up signal; and reporting the beam measurements for use by the network entity for beam management.

[0010] Certain aspects provide a method for wireless communication by a network entity. The method generally includes: sending at least one type of beam scanning wake-up signal to a user equipment (UE) before an on period of a connected mode discontinuous reception (C-DRX) cycle; receiving a beam measurement report from the UE, the beam measurement report being based on a measurement of the beam scanning wake-up signal; and adjusting a beam set for subsequent transmission of the beam scanning wake-up signal based on the beam measurement report.

[0011] Certain aspects of the present disclosure also provide various apparatuses, components, and computer-readable media configured to perform (or cause a processor to perform) the operations described herein.

[0012] To achieve the aforementioned and related purposes, one or more aspects include features fully described below and specifically pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features indicate only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more specific description of the above briefly summarized content may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered as limiting its scope, as the description may admit of other equally effective aspects.

[0014] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0015] Figure 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0016] Figure 3 is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0017] 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.

[0018] Figure 5 is a diagram illustrating an example for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.

[0019] Figure 6 An example of a frame format for a New Radio (NR) system is shown, in accordance with certain aspects of the present disclosure.

[0020] Figure 7 Connected mode discontinuous reception (C-DRX) operation is shown, in which aspects of the present disclosure may be practiced.

[0021] Figure 8 C-DRX with beamforming is shown, in which aspects of the present disclosure may be practiced.

[0022] Fig. 9 An example C-DRX with wake-up signal (WUS) is shown in which aspects of the present disclosure may be practiced.

[0023] Fig.10An example C-DRX with beamforming WUS is shown in which aspects of the present disclosure may be practiced.

[0024] Fig.11 Example operations for wireless communications by a user equipment are illustrated in accordance with certain aspects of the present disclosure.

[0025] Fig.12 Example operations for wireless communications by a network entity are illustrated in accordance with certain aspects of the present disclosure.

[0026] Fig.13 Example types of WUS for beam management (BM) in accordance with certain aspects of the present disclosure are shown.

[0027] Fig.14 An example use of WUS for BM in accordance with certain aspects of the present disclosure is shown.

[0028] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0029] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for beam management (BM) for C-DRX operation utilizing a wake-up signal (WUS).

[0030] The following description provides examples rather than limiting the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may omit, replace or add various procedures or components as appropriate. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionalities or structures and functionalities as supplements to the various aspects of the present disclosure set forth herein or in addition. 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 wording "exemplary" is used herein to mean used as "example, instance or illustration". Any aspect described herein as "exemplary" is not necessarily to be interpreted as superior to or superior to other aspects.

[0031] The technology described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, etc. UTRA includes other variants of Wideband CDMA (W-CDMA) and 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 can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDMA, etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS).

[0032] New Radio (NR) is an emerging wireless communication technology developed in conjunction with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (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 "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization called "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0033] New Radio (NR) access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or higher), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting 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.

[0034] Example Wireless Communication System

[0035] Figure 1 An example wireless communication network 100 is shown in which aspects of the present disclosure may be implemented. For example, UE 120 and BS 110 may respectively implement Fig.11 and Fig.12 The operations shown in FIG. 1 are for beam management of a wake-up signal (WUS) sent by BS 110 before the on period of a C-DRX cycle.

[0036] The wireless communication network 100 may be a New Radio (NR) or 5G network. Figure 1 As shown, the wireless communication network 100 may include multiple base stations (BS) 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 Node B (NB) and / or a Node B subsystem serving the coverage area, depending on the context in which the term is used. In the NR system, the term "cell" and the next generation NodeB (gNB), new radio base station (NR BS), 5G NB, access point (AP) or transmit receive point (TRP) may be interchangeable. In some examples, the cell may not necessarily be fixed, and the geographical area of ​​the cell may move according to the location of the mobile BS. In some examples, the base station may be interconnected to each other and / or to one or more other base stations or network nodes (not shown) in the wireless communication network 100 through various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, or analogs using any suitable transmission networks).

[0037] 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, frequency modulation (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.

[0038] A base station (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., several kilometers in radius) and may allow unlimited access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow limited access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow limited access to 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.

[0039] The wireless communication network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., a BS or a UE) and sends transmissions of the data 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.

[0040] 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 effects on interference in the wireless communication network 100. For example, a macro BS may have a high 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).

[0041] The wireless communication network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be roughly aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0042] A network controller 130 may couple to a set of BSs and provide coordination and control for these BSs. Network controller 130 may communicate with BSs 110 via a backhaul. BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0043] UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless network 100, and each UE may be fixed or mobile. UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, 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 medium. Some UEs may be considered as machine type communication (MTC) devices or evolved MTC (eMTC) devices. For example, MTC and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network), for example, via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0044] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency modulation, frequency slots (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 spacing of subcarriers can be 15kHz, and the minimum resource allocation (called "resource block" (RB)) can be 12 subcarriers (or 180kHz). 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 partitioned into subbands. For example, a subband may cover 1.08 MHz (ie, 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.

[0045] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may also be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on the uplink and downlink 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 (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells (up to 8 serving cells) may be supported.

[0046] In some examples, access to the air interface can be scheduled, wherein a scheduling entity (e.g., a base station) allocates resources for communication between some or all devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entity utilizes the resources allocated by the scheduling entity. The base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may be used as a scheduling entity, and resources for one or more subordinate entities (e.g., one or more other UEs) may be scheduled, and other UEs may use the resources scheduled by the UE for wireless communication. In some examples, a UE may be used as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0047] exist Figure 1 In FIG. 1 , 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 a downlink and / or uplink. A thin dashed line with double arrows indicates interfering transmissions between a UE and a BS.

[0048] Figure 2 An example logical architecture of a distributed radio access network (RAN) 200 is shown, which may be Figure 1 200. The 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. The backhaul interface to the next generation core network (NG-CN) 204 may terminate at the ANC 202. The backhaul interface to the adjacent 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.).

[0049] The TRP 208 may be a distributed unit (DU). The TRP 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND 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).

[0050] The logical architecture of the distributed RAN 200 may support fronthaul solutions across different deployment types. For example, the logical architecture may be based on the transmitting network capabilities (eg, bandwidth, latency, and / or jitter).

[0051] 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 a common fronthaul may be shared for LTE and NR.

[0052] The logical architecture of the distributed RAN 200 may enable collaboration between TRPs 208, for example, within and / or across TRPs via the ANC 202. An inter-TRP interface may not be used.

[0053] 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 (PHY) layer can be adaptively placed at the DU (e.g., TRP 208) or the CU (e.g., ANC 202).

[0054] Figure 3 An example physical architecture of a distributed radio access network (RAN) 300 according to aspects of the present disclosure is shown. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally deployed. C-CU 302 functionality may be offloaded (e.g., to advanced wireless services (AWS)) in an effort to handle peak capacity.

[0055] A centralized RAN unit (C-RU) 304 may host one or more ANC functions. Alternatively, the C-RU 304 may host core network functions locally. The C-RU 304 may have a distributed deployment. The C-RU 304 may be close to the network edge.

[0056] The DU 306 may host one or more TRPs (edge ​​node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) functionality.

[0057] Figure 4 It shows (as Figure 110 and UE 120, which may be used to implement aspects of the present disclosure. For example, antenna 452, processors 466, 458, 464, and / or controller / processor 480 of UE 120 and / or antenna 434, processors 420, 430, 438, and / or controller / processor 440 of BS 110 may be used to perform various techniques and methods described herein (e.g., Fig.11 and Fig.12 Operations 1100 and 1200).

[0058] 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 group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 420 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The processor 420 may also generate reference symbols (e.g., reference symbols 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 ​​data symbols, control symbols, and / or reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 432a to 432t. Each modulator 432 can process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator can also process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 432a to 432t can be transmitted via antennas 434a to 434t, respectively.

[0059] At UE 120, antennas 452a to 452r can receive downlink signals from base station 110 and can provide received signals to demodulators (DEMODs) in transceivers 454a to 454r, respectively. Each demodulator 454 can condition (e.g., filter, amplify, downconvert, and digitize) the respective received signals to obtain input samples. Each demodulator can also process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 456 can obtain received symbols from all demodulators 454a to 454r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 458 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data of UE 120 to data pool 460, and provide decoded control information to controller / processor 480.

[0060] On the uplink, at the UE 120, a transmit processor 464 may receive and process data from a data source 462 (e.g., data for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., control information 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 a demodulator in the transceivers 454a to 454r (e.g., for SC-FDM, etc.), and transmitted to the base station 110. At the BS 110, the uplink signals from the UE 120 may be received by the antenna 434, processed by the modulator 432, detected by the MIMO detector 436 (if applicable), and further processed by the receive processor 438 to obtain decoded data and control information transmitted by the UE 120. Receive processor 438 may provide decoded data to data sink 439 and decoded control information to controller / processor 440 .

[0061] Controllers / processors 440 and 480 may direct the operation at BS 110 and UE 120, respectively. Processor 440 and / or other processors and modules at BS 110 may perform or direct the execution of processes for the techniques described herein. 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.

[0062] Figure 5A diagram 500 illustrating an example of implementing a communication protocol stack according to various aspects of the present disclosure is shown. The communication protocol stack shown 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 shows a communication protocol stack including 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, these layers of the protocol stack can be implemented as separate software modules, parts of a processor or ASIC, parts of collocated devices connected by a communication link, or various combinations thereof. Collocated and non-collocated implementations can be used, for example, in a protocol stack for a network access device (e.g., AN, CU, and / or DU) or a UE.

[0063] The first option 505-a illustrates a split implementation of the protocol stack, where the implementation of the protocol stack can be implemented in a centralized network access device (e.g., Figure 2 ANC 202 in ) and distributed network access equipment (e.g., Figure 2 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 collocated or non-collocated. The first option 505-a can be useful in macro cell, micro cell or pico cell deployment.

[0064] The second option 505-b shows a unified implementation of the protocol stack, where the protocol stack can be implemented in a single network access device. In the second option, the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530 can each be implemented by an AN. The second option 505-b can be useful in, for example, a femtocell deployment.

[0065] Regardless of whether the network access device implements part or all of the protocol stack, the UE can implement the entire protocol stack (e.g., RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530) as shown in 505-c.

[0066] In LTE, the basic transmission time interval (TTI) or packet duration is a 1ms subframe. In NR, a 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. NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15KHz, and other subcarrier spacings can be defined relative to the basic subcarrier spacing, such as 30kHz, 60kHz, 120kHz, 240kHz, etc. Symbol and time slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing.

[0067] Figure 6 600 is a diagram showing an example of a frame format 600 for NR. The transmission timeline of each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes with indices 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. An index may be assigned to the symbol period in each slot. A small slot, which may be referred to as a subslot structure, refers to a transmission time interval (e.g., 2, 3, or 4 symbols) whose duration is less than a slot.

[0068] Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be switched dynamically. The link direction may be based on the slot format. Each slot may include DL / UL data and DL / UL control information.

[0069] In NR, a synchronization signal (SS) block is transmitted. The SS block includes PSS, SSS, and two-symbol PBCH. The SS block can be in a fixed time slot position (such as Figure 60-3 shown in ). PSS and SSS can be used by UE 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 identity. PBCH carries some basic system information (SI), such as downlink system bandwidth, timing information within radio frames, SS burst set periodicity, system frame number, etc. SS blocks 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. SS blocks can be sent up to sixty-four times, for example, for mmW, up to sixty-four different beam directions. Up to sixty-four transmissions of SS blocks are called SS burst sets.

[0070] In some cases, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world 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 mesh networks, and / or various other suitable applications. In general, a sidelink signal may refer to a signal that is communicated from one subordinate entity (e.g., UE1) to another subordinate 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, the sidelink signal may be communicated using licensed spectrum (unlike wireless local area networks, which typically use unlicensed spectrum).

[0071] The UE may operate in various radio resource configurations, including a configuration associated with sending a pilot using a dedicated resource set (e.g., a radio resource control (RRC) dedicated state, etc.) or a configuration associated with sending a pilot using a common resource set (e.g., an RRC common state, etc.). When operating in the RRC dedicated state, the UE may select a dedicated resource set to send a pilot signal to the network. When operating in the RRC common state, the UE may select a common resource set to send a pilot signal to the network. In either case, the pilot signal 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 a pilot signal sent on a common resource set, and also receive and measure a pilot signal sent on a dedicated resource set allocated to the UE, wherein the network access device is a member of a monitoring network access device set of the UE. One or more receiving network access devices, or (multiple) CUs to which the receiving network access device sends a measurement of a pilot signal may use these measurements to identify the UE's serving cell, or initiate a change in the serving cell for one or more UEs.

[0072] Example C-DRX with beamforming and wake-up signal

[0073] like Figure 7 As shown in the example timing diagram 700 of , during periods of traffic inactivity, the UE can switch to C-DRX operation in order to save power. In C-DRX, when there is no data transmission in either direction (UL / DL) for the UE in RRC connected mode, the UE enters DRX mode. In C-DRX, the UE does not monitor the PDCCH channel continuously. In other words, the UE alternates between sleep (DRX off) cycles and wake-up (DRX on) cycles. C-DRX causes power savings because if there is no DRX cycle, the UE will unnecessarily monitor the PDCCH transmission in each subframe to check whether there is available downlink data.

[0074] C-DRX may be configured for a UE based on various configuration parameters such as an inactivity timer, a short DRX timer, a short DRX cycle, and a long DRX cycle.

[0075] like Figure 7 As shown, based on the configured period, the UE occasionally wakes up during the on-duration and monitors the PDCCH transmission. In addition to the on-duration, for the rest of the C-DRX cycle, the UE can remain in a low power (sleep) state called the off-duration. During the off-duration, the UE is not expected to send and receive any signals.

[0076] As shown in the figure, the UE can wake up when the C-DRX mode is terminated. For example, if the UE detects PDCCH scheduling data during the on-duration period, the UE remains on to send and receive data. Otherwise, the UE returns to sleep at the end of the on-duration period.

[0077] like Figure 8 As shown in example timing diagram 800 of , in some cases, beamforming can be used with C-DRX to increase the likelihood of reaching the UE. While beamforming can enhance communications, it is not without challenges. For example, without beam tracking, beam pairs may degrade during C-DRX off periods. The longer the C-DRX cycle, the more susceptible the transmission is to beam degradation. While shorter C-DRX cycles are less prone to beam degradation, shorter cycles also suffer from power consumption penalties.

[0078] like Figure 8 As shown, due to beam offset (or beam blocking or MPE, etc.) caused by UE direction change or movement, the UE may not be able to receive the PDCCH at the beginning of the next C-DRX on duration and cannot wake up.

[0079] In some cases, the sleep (off) duration can be extended by using a wake-up signal (WUS). Fig. 9 The example timing diagram 900 in FIG. 9 shows the general principle of WUS in C-DRX.

[0080] As shown in the figure, before the C-DRX on duration, only the wake-up subsystem is turned on for WUS decoding (while the main modem is not turned on). The wake-up subsystem usually uses a low-complexity receiver (e.g., a simple correlator) with lower power consumption than PDCCH decoding. WUS can be a special waveform, such as a special frequency tone, preamble, reference signal, etc.

[0081] As shown in the figure, the UE wakes up the full modem in the next On-Duration only if a WUS is detected. Otherwise, the UE skips the On-Duration and goes back to sleep until the next C-DRX cycle.

[0082] like Fig.10 As shown in the example timing diagram 1000 of FIG. 1 , beamforming can also be applied to WUS transmissions. For example, a set of N beams (e.g., N out of up to 64 SSBs) can be configured for a UE. The value of N and the directions of the N beams can be determined specifically for a UE (or group) by the gNB (e.g., based on link quality, UE mobility, UE capabilities, C-DRX cycle length, etc.).

[0083] Example wake-up beam management for C-DRX

[0084] As described above, the wake-up signal (WUS) may be used to improve power efficiency during C-DRX operation, allowing the UE to avoid waking up unnecessarily during the on-duration of the C-DRX cycle (to monitor PDCCH transmissions) when there is no data for the UE.

[0085] For mmW systems that rely on beamforming for transmission and reception (Tx / Rx), beam scanning for WUS may be performed. As described above, scanning the N wake-up beams (beams used for WUS transmission) reduces the likelihood that the UE misses the WUS transmission from the BS due to beam degradation (e.g., due to misalignment, blocking, etc.). In other words, if the UE detects at least one of the N wake-up beams (a WUS transmitted using the at least one wake-up beam), the UE may wake up within the next on-duration.

[0086] However, even with N beams to scan, it is still possible that the UE cannot detect the WUS from the BS. For example, if the DRX cycle is too long or the UE mobility is too high, the beam degradation may be so rapid that all the scanned N WUS beams may fail.

[0087] However, aspects of the present disclosure provide techniques for maintaining a beam for a WUS transmission sent prior to the on-period of connected mode discontinuous reception (C-DRX). Such beam maintenance can help mitigate the effects of rapid beam degradation and allow selection of one or more new beams included in the set of N beams for scanning.

[0088] Fig.11 Example operations 1100 for wireless communications by a UE in accordance with aspects of the present disclosure are shown. For example, operations 1100 may be performed by a UE in a C-DRX state to maintain a beam set for transmitting a WUS.

[0089] According to various aspects, the UE may include: Figure 4 One or more components shown may be configured to perform the operations described herein. Figure 4 The illustrated antenna 452, demodulator / modulator 454, controller / processor 480, and / or memory 482 may perform the operations described herein.

[0090] At 1102, operations 1100 begin by monitoring at least one type of beam scanning WUS sent from a network entity before an on period of a C-DRX cycle. At 1104, the UE performs beam measurement of the beam scanning WUS. At 1106, the UE reports the beam measurement for the network entity to perform beam management.

[0091] Fig.12 Example operations 1200 for wireless communications by a network entity (e.g., a base station / gNB) are shown. For example, operations 1200 may be performed by a base station to maintain a beam set for transmitting a WUS to a UE in a C-DRX state.

[0092] According to various aspects, the BS may include: Figure 4 One or more components shown may be configured to perform the operations described herein. Figure 4 The illustrated antenna 434, demodulator / modulator 432, controller / processor 440, and / or memory 442 may perform the operations described herein.

[0093] At 1202, operations 1200 begin by sending at least one type of beam scanning wake-up signal to a user equipment (UE) before an on period of a C-DRX cycle. At 1204, a network entity receives a beam measurement report from the UE, the beam measurement report being based on a measurement of the beam scanning WUS. At 1206, the network entity adjusts a beam set for subsequent transmissions of the beam scanning WUS based on the beam measurement report.

[0094] As described above, various types of signals may be used for WUS. In some cases, a PDCCH type signal may be used for WUS (e.g., the PDCCH type in terms of format and / or the DMRS signal sent therewith). In some cases, a type of reference signal may be used for WUS. As an example, in NR, a CSI-RS-like or DMRS-like waveform may be used as a WUS with beam scanning. In other work, although CSI-RS may be used for CSI measurements and beam management in non-DRX mode, it may also be used for WUS.

[0095] Fig.13 There is a table 1300 that lists the various types of WUS and the corresponding actions if detected. Fig.13 As shown, different types of WUS can be used for different purposes. For example, a first type of WUS (referred to herein as type A) can be used for waking up the UE and (possibly) beam management, while a second type of WUS (referred to herein as type B) can be used only for beam management.

[0096] In response to detecting a Type A WUS, the UE may prepare to wake up (and possibly perform beam measurements and reporting) in the next On Duration. The UE then wakes up and starts monitoring the PDCCH during the On Duration. For example, the gNB may be triggered to send a Type A WUS when the gNB has data to send to the UE in the next On Duration. Type A WUS may have benefits such as coarse (coarse) beam management for WUS transmissions, which may help to quickly ramp up the UE in the next On Duration (e.g., using fast L1 feedback from WUS measurements).

[0097] In response to detecting a Type B WUS, the UE may perform beam measurements and LI reporting. Based on the report, the gNB may update the WUS beam set (e.g., its N beams) and indicate the updated beams to the UE (e.g., via MAC-CE). After the measurement and reporting, the UE may return to sleep. The gNB may be triggered to send a Type B WUS periodically (e.g., once every X DRX cycles) or based on a timer (e.g., Y DRX cycles from a previous Type A / B WUS transmission). Type B WUS may have benefits such as allowing occasional beam management to help the UE keep tracking (coping with beam degradation) when the inactivity duration becomes very long.

[0098] In some cases, the two types of WUS can be distinguished by, for example, different scrambling sequences, resource mapping, etc. The UE can perform blind decoding to distinguish the two types of WUS. In some cases, if the timing of the two types coincides, only type A can be sent. In other words, type A can be given priority because it is actually intended to wake up the UE in the next C-DRX on cycle, while type B is intended only for beam management.

[0099] Fig.14 An example timeline 1400 is shown, which demonstrates the use of Type A and Type B WUS as described herein. As shown, the main purpose of Type A WUS is to wake up the UE from C-DRX mode (e.g., terminate C-DRX operation). On the other hand, the main purpose of Type B WUS is to provide the UE with an opportunity for wake-up signal beam management.

[0100] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0101] 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. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0102] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. "Determining" may also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. "Determining" may also include resolving, selecting, choosing, establishing, and the like.

[0103] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated), but "one or more". Unless otherwise specifically stated, the term "some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to those of ordinary skill in the art and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be contributed to the public, regardless of whether such disclosure is explicitly stated in the claims. Any element of the claim should not be interpreted under the provisions of 35 U.S.C. § 112 (f), unless the element is explicitly stated using the phrase "parts for..." or in the case of a method claim, the element is stated using the phrase "step for...".

[0104] The various operations of the above described method can be performed by any suitable components capable of performing the corresponding functions. These 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, in the case of the operations shown in the accompanying drawings, these operations may have corresponding paired components plus functional components with similar numbers.

[0105] The various illustrative logical blocks, modules, and circuits described in connection with the present disclosure may be implemented or performed 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. For example, Figure 4 The respective processors of the UE 120 and the BS 110 shown may be configured to perform the operations described herein and Fig.11 and Fig.12 The operation shown.

[0106] A general purpose processor may be a microprocessor, but in the alternative, 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, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0107] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., 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 user terminal 120 (see Figure 1 ), a user interface (e.g., a keypad, 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 further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. Those skilled in the art will recognize how to best implement the functionality described for the processing system, depending on the specific application and the overall design constraints imposed on the overall system.

[0108] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place 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. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. Alternatively, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any portion thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an 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. The machine-readable medium may be embodied in a computer program product.

[0109] A software module may include a single instruction or many instructions, and may be distributed over several different code segments, distributed between different programs, and distributed across multiple storage media. A computer-readable medium may include multiple software modules. These software modules include instructions that cause a processing system to perform various functions when executed by a device (such as a processor). These software modules may include a sending module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a 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 a processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0110] In addition, any connection is properly referred to as 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 technology (such as infrared (IR), radio and microwave), the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology (such as infrared, radio and microwave) is 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 blue-ray disc, wherein the disk is usually magnetically reproduced data, while the disc uses laser to optically reproduce data. Therefore, in some aspects, the computer-readable medium may include a non-transient computer-readable medium (e.g., a tangible medium). In addition, for other aspects, the computer-readable medium may include a transient computer-readable medium (e.g., a signal). The above combination should also be included in the scope of computer-readable media.

[0111] Thus, some 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 (and / or encoded) thereon instructions that can be executed by one or more processors to perform the operations described herein. For example, for performing the operations described herein and in Fig.11 and Fig.12 The operations shown in the instructions.

[0112] In addition, it should be appreciated that the modules and / or other appropriate components for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by a user terminal and / or a base station at an appropriate occasion. For example, such a device may be coupled to a server to facilitate the transfer of components for performing the methods described herein. Alternatively, the various methods described herein may 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: once the storage component is coupled to or provided to a user terminal and / or a base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0113] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions 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: Before a start period of a connected mode discontinuous reception C-DRX cycle, monitoring multiple types of beam scanning wake-up signals, the multiple types of beam scanning wake-up signals comprising a first type of beam scanning wake-up signal designed to wake up the UE in a subsequent start period of the C-DRX cycle; and a second type of beam scanning wake-up signal designed only for beam management; performing beam measurement of the detected beam scanning wake-up signal based on the type of the detected beam scanning wake-up signal; and The beam measurements are reported for use by a network entity for beam management. 2 . The method of claim 1 , wherein the beam scanning wake-up signal comprises a type of reference signal.

3. The method according to claim 1, wherein the UE is configured to: performing beam measurement based on the first type of beam scanning wake-up signal; and In response to detecting the first type of beam scanning wake-up signal, waking up in a subsequent on period of the C-DRX cycle to monitor a Physical Downlink Control Channel (PDCCH) transmission.

4. The method according to claim 3, wherein the UE is configured to: performing beam measurement based on the second type of beam scanning wake-up signal; and Avoiding waking up in the subsequent on period of the C-DRX cycle to monitor a Physical Downlink Control Channel (PDCCH) transmission.

5. The method according to claim 1, further comprising: First and second types of beam scanning wake-up signals are distinguished. The method of claim 5 , wherein the first and second types of beam scanning wake-up signals are distinguished by at least one of: different scrambling sequences or different resource mappings.

7. The method according to claim 1, further comprising: detecting first and second types of beam scanning wake-up signals; as well as Priority is given to the first type of beam scanning wake-up signal.

8. The method of claim 1, wherein the second type of beam scanning wake-up signal is sent at least one of: periodically or based on a timer relative to a transmission of a previous beam scanning wake-up signal.

9. The method according to claim 1, further comprising: An indication of an updated set of beams is received, wherein the updated set of beams is used for subsequent transmission of a beam scanning wake-up signal based on the measurement report.

10. A method for wireless communication by a network entity, comprising: Before an on period of a connected mode discontinuous reception C-DRX cycle, sending at least one of a plurality of types of beam scanning wake-up signals, the plurality of types of beam scanning wake-up signals comprising a first type of beam scanning wake-up signal designed to wake up the UE in a subsequent on period of the C-DRX cycle; and a second type of beam scanning wake-up signal designed to be used only for beam management, wherein the at least one type of beam scanning wake-up signal sent includes an indication of the type of beam scanning wake-up signal sent; receiving a beam measurement report based on a measurement of a beam scanning wake-up signal performed according to a type of the measured beam scanning wake-up signal; and Based on the beam measurement report, a beam set used for subsequent transmission of a beam scanning wake-up signal is adjusted. The method of claim 10 , wherein the beam scanning wake-up signal comprises a type of reference signal.

12. The method of claim 10, wherein the first and second types of beam scanning wake-up signals are distinguished by at least one of: different scrambling sequences or different resource mappings.

13. The method of claim 10, wherein the second type of beam scanning wake-up signal is sent at least one of: periodically or based on a timer relative to a previous transmission of the beam scanning wake-up signal.

14. The method according to claim 10, further comprising: An indication of the adjusted beam set is sent.

15. The method of claim 10, wherein: When a first condition related to a reason for waking up the UE is met, sending a first type of beam scanning wake-up signal; When a second condition related to a reason for performing beam management is satisfied, transmitting a second type of beam scanning wake-up signal; and If both the first and second conditions are met, only the first type of beam scanning wake-up signal is sent.

16. An apparatus for wireless communication by a user equipment UE, comprising: A component for monitoring multiple types of beam scanning wake-up signals before the start period of the connected mode discontinuous reception C-DRX cycle, wherein the multiple types of beam scanning wake-up signals include a first type of beam scanning wake-up signal, which is designed to wake up the UE in a subsequent start period of the C-DRX cycle; and a second type of beam scanning wake-up signal, which is designed only for beam management; means for performing beam measurement of the detected beam scanning wake-up signal based on the type of the detected beam scanning wake-up signal; as well as Means for reporting said beam measurements for use by a network entity for beam management. The apparatus of claim 16 , wherein the beam scanning wake-up signal comprises a type of reference signal.

18. The apparatus according to claim 16, wherein the UE is configured to: performing beam measurement based on the first type of beam scanning wake-up signal; and In response to detecting the first type of beam scanning wake-up signal, waking up in a subsequent on period of the C-DRX cycle to monitor a Physical Downlink Control Channel (PDCCH) transmission.

19. The apparatus according to claim 18, wherein the UE is configured to: performing beam measurement based on the second type of beam scanning wake-up signal; and Avoiding waking up in the subsequent on period of the C-DRX cycle to monitor a Physical Downlink Control Channel (PDCCH) transmission.

20. The apparatus of claim 16, further comprising: Means for distinguishing between first and second types of beam scanning wake-up signals.

21. The apparatus of claim 20, wherein the first and second types of beam scanning wake-up signals are distinguished by at least one of: different scrambling sequences or different resource mappings.

22. The apparatus of claim 16, further comprising: means for detecting first and second types of beam scanning wake-up signals; as well as Means for prioritizing a first type of beam scanning wake-up signal.

23. The apparatus of claim 16, wherein the second type of beam scanning wake-up signal is sent at least one of periodically or based on a timer relative to a previous transmission of the beam scanning wake-up signal.

24. The apparatus of claim 16, further comprising: Means for receiving an indication of an updated set of beams for subsequent transmission of the beam scanning wake-up signal based on the measurement report.

25. An apparatus for wireless communication by a network entity, comprising: means for sending at least one of a plurality of types of beam scanning wake-up signals before an on period of a connected mode discontinuous reception C-DRX cycle, the plurality of types of beam scanning wake-up signals comprising a first type of beam scanning wake-up signal designed to cause the UE to wake up in a subsequent on period of the C-DRX cycle; and a second type of beam scanning wake-up signal designed to be used only for beam management, wherein the at least one type of beam scanning wake-up signal sent includes an indication of the type of beam scanning wake-up signal sent; means for receiving a beam measurement report based on measurements of a beam scanning wake-up signal performed according to a type of the measured beam scanning wake-up signal; as well as Means for adjusting a set of beams used for subsequent transmission of a beam scanning wake-up signal based on the beam measurement report.

26. An apparatus for wireless communication by a user equipment UE, comprising: Memory; and One or more processors, coupled to the memory and configured to execute the method according to any one of claims 1-9.

27. An apparatus for wireless communication by a network entity, comprising: Memory; and One or more processors, coupled to the memory and configured to execute the method according to any one of claims 10-15.

28. A non-transitory computer storage medium storing instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 1-15.

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