Method and apparatus for wireless communication

Abstract

Methods and apparatuses for wireless communications are described. A base station can initiate a beam management procedure, including reference signal transmissions to a user equipment (UE), and receive beam training. The base station can configure the UE to monitor a set of beams for the reference signals. Based on the received reference signals, the UE can optionally select one or more transmit beams for wake-up signal reception, and can transmit an indication of the selected beams to the base station. The base station can transmit a wake-up signal through the originally configured transmit beams or the UE-selected transmit beams to initiate a wake-up procedure at the UE. The base station and the UE can subsequently perform a refined beam management procedure, providing refined reference signal transmissions from the base station. Based on the received transmissions, the UE can select a refined beam for downlink transmissions.

Description

[0001] This application is a divisional application of the patent application filed on August 9, 2018, with international application number PCT / US2018 / 046093, Chinese application number 201880051123.4, entitled "Beam Management for Beam-Sweeping Wake-up Signals".

[0002] Cross-referencing

[0003] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 544,751, filed August 11, 2017, entitled “Beam Management for Beam-Swept Wakeup Signals,” and U.S. Patent Application No. 16 / 058,706, filed August 8, 2018, entitled “Beam Management for Beam-Swept Wakeup Signals,” each of which is assigned to the assignee of this application.

[0004] background

[0005] The following generally relates to wireless communication, and in particular to beam management for beam-sweep wake-up signals.

[0006] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems or LTE-A Advanced systems) and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ various technologies, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended OFDM (DFT-S-OFDM). A wireless multiple access communication system may include several base stations or network access nodes, each supporting communication from multiple communication devices simultaneously, which may also be referred to as User Equipment (UE).

[0007] Wireless communication systems can operate in the millimeter-wave (mmW) frequency range, such as 28 GHz, 40 GHz, 60 GHz, etc. Wireless communication at these frequencies can be associated with increased signal attenuation (e.g., path loss), which can be affected by various factors such as temperature, air pressure, diffraction, etc. As a result, signal processing techniques such as beamforming can be used to coherently combine energy and overcome path loss at these frequencies. Due to the increased path loss in mmW communication systems, transmissions from base stations and / or UEs can be beamformed.

[0008] The UE can operate in discontinuous reception (DRX) modes (e.g., connected DRX (C-DRX) mode), where the UE switches between an active state (e.g., where the UE wakes up to determine if data is available to the UE) and a sleep state (e.g., where the UE shuts down individual hardware / processes to save power). The UE can determine data availability by monitoring control channels (such as the Physical Downlink Control Channel (PDCCH)). The PDCCH may carry or otherwise convey an indication that the base station has data ready to be transmitted to the UE. In mmW wireless communication systems, mmW base stations (e.g., next-generation B-nodes (gNBs)) may need to beam-scan PDCCH transmissions to mitigate the high path loss associated with mmW transmissions. This may cause the UE to attempt to decode the PDCCH multiple times and / or wake up for longer periods to receive and decode PDCCH transmissions and / or allow beam management. Power consumption at the UE using such techniques can be high.

[0009] Overview

[0010] The described technology relates to improved methods, systems, devices, or apparatuses supporting discontinuous reception wake-up procedures. Generally, the described technology provides beam-sweep wake-up signals to user equipment (UE) in a sleep state in Connected Discontinuous Reception (C-DRX) mode. For example, a base station can use a beam-sweep configuration to transmit a set of signals (e.g., reference signals, synchronization signals, etc.). In these cases, the UE can be configured by the base station to monitor the beams carrying that signal set. Based on the received signals, the UE can optionally indicate different beam sets to be used by the base station to transmit the wake-up signal. For example, the UE can detect that the signal quality has not degraded by monitoring the beam set, and the UE can suppress the transmission of indications to different beam sets. Alternatively, the quality of the signal set transmitted on that beam set may be degraded, and the UE can select another beam set for the transmission of the wake-up signal. In either case, the base station can transmit the wake-up signal on at least two beams in the configured beam set or the beam set selected by the UE. A wake-up signal transmitted on any beam can be used by the UE to efficiently wake up from sleep mode in C-DRX mode.

[0011] After transmitting the wake-up signal, the base station can transmit a second set of signals (e.g., reference signals or synchronization signals, or combinations thereof) that can be used for hierarchical beam management. For example, the base station can transmit the wake-up signal on multiple coarse beams. The base station can then transmit the second set of signals on another, finer beam set (e.g., using more beams than those used for wake-up signal transmission), and the UE can instruct at least one finer beam for downlink transmission from the base station. Accordingly, the hierarchical beam management procedure can coherently use the wake-up signal to further refine the beam set for downlink data or control information transmission.

[0012] A wireless communication method is described. The method may include: identifying data available for transmission to a UE operating in DRX mode; and transmitting a wake-up signal to the UE to wake it from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration.

[0013] An apparatus for wireless communication is described. The apparatus may include: means for identifying data available for transmission to a UE operating in DRX mode; and means for transmitting a wake-up signal to the UE to wake it from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration.

[0014] Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions are operable to cause the processor to: identify data available for transmission to a UE operating in DRX mode; and transmit a wake-up signal to the UE to wake it from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration.

[0015] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include instructions operable to cause a processor to perform the following operations: identifying data available for transmission to a user equipment (UE) operating in DRX mode; and transmitting a wake-up signal to the UE to wake it from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration.

[0016] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described above may further include processes, features, means or instructions for configuring the UE to operate in DRX mode while monitoring a first transmit beam set to receive a set of signals from a base station, the set of signals including a reference signal, or a synchronization signal, or a combination thereof.

[0017] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described above, receiving an instruction from the UE for a second set of transmit beams, the second set of transmit beams comprising a plurality of transmit beams selected by the UE at least in part based on the set of signals, wherein transmitting a wake-up signal comprises: transmitting a wake-up signal using a plurality of transmit beams in the second set of transmit beams, at least in part based on the received instruction.

[0018] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, each beam in the second transmit beam set may be different from each beam in the first transmit beam set. Some examples of the methods, apparatuses, and non-transient computer-readable media described above may further include processes, features, means, or instructions for configuring the UE to transmit instructions to the second transmit beam set at a predetermined periodicity.

[0019] Some examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for determining a link quality threshold for decoding a wake-up signal. Some examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for configuring a UE to transmit an indication to a second transmit beam set when the link quality of either the first or second transmit beam in the first transmit beam set fails to meet the determined link quality threshold.

[0020] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, receiving an instruction for a second transmitted beamset includes receiving a beam recovery signal identifying the second transmitted beamset. In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the reference signal includes a demodulation reference signal (DMRS), a tracking reference signal (TRS), a phase compensation reference signal (PC-RS), or a channel state information reference signal (SCI-RS), or a combination thereof. In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the synchronization signal includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH) signal, or a combination thereof.

[0021] Examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for: configuring the UE to operate in DRX mode while monitoring a first transmit beamset to receive a signal set from a base station, the signal set including a reference signal, or a synchronization signal, or a combination thereof. Examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for: using the first transmit beamset to transmit the signal set according to a beam sweep configuration.

[0022] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the first transmit beam, or the second transmit beam, or both, may be a pseudo-omnidirectional beam. Some examples of the methods, apparatuses, and non-transient computer-readable media described above may further include processes, features, means, or instructions for identifying a plurality of transmit beams used to transmit a set of synchronization signals. Some examples of the methods, apparatuses, and non-transient computer-readable media described above may further include processes, features, means, or instructions for identifying at least a first transmit beam and a second transmit beam in a first transmit beam set, at least in part based on the identified plurality of transmit beams used to transmit a set of synchronization signals.

[0023] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the wake-up signal includes narrowband frequency modulation, or a reference signal that varies depending on the UE, or a physical downlink control channel (PDCCH) including bits indicating that the UE can wake up from a sleep state, or a combination thereof. In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the DRX mode includes connected DRX (C-DRX) mode.

[0024] A wireless communication method is described. The method may include: simultaneously operating in a discontinuous reception (DRX) mode, receiving from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; selecting a second set of transmit beams, at least in part based on the received first set of signals, the second set of transmit beams comprising two or more transmit beams, and the two or more transmit beams being different from the first set of transmit beams; and transmitting to the base station an indication of the selected second set of transmit beams.

[0025] An apparatus for wireless communication is described. The apparatus may include: means for receiving, while operating in a discontinuous reception (DRX) mode, a first signal set from a base station and a second signal set from a second transmit beam set, wherein the first signal set includes a reference signal, or a synchronization signal, or a combination thereof; means for selecting the second transmit beam set based at least in part on the received first signal set, the second transmit beam set including two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set; and means for transmitting an indication to the base station of the selected second transmit beam set.

[0026] Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions are operable to cause the processor to: simultaneously operate in a discontinuous reception (DRX) mode to receive from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; select a second set of transmit beams, comprising two or more transmit beams, which are different from the first set of transmit beams, based at least in part on the received first set of signals; and transmit an indication to the base station of the selected second set of transmit beams.

[0027] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include instructions operable to cause a processor to perform the following operations: while operating in a discontinuous reception (DRX) mode, simultaneously receiving from a base station a first set of signals from a first transmit beam set and a second set of signals from a second transmit beam set, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; selecting a second transmit beam set based at least in part on the received first set of signals, the second transmit beam set comprising two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set; and transmitting to the base station an indication of the selected second transmit beam set.

[0028] Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for receiving a wake-up signal from a base station using at least one transmit beam from a second transmit beam set. Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for waking from a sleep state in DRX mode, at least in part, based on a received wake-up signal, to receive data.

[0029] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the wake-up signal includes a narrowband frequency modulation, or a reference signal that varies depending on the UE, or a PDCCH including bits indicating that the UE can wake up from a sleep state, or a combination thereof. Some examples of the methods, apparatuses, and non-transient computer-readable media described above may further include processes, features, means, or instructions for determining the signal quality associated with a first set of received signals, wherein identifying a second transmit beam set may be based on a signal quality threshold.

[0030] In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, transmitting an indication of a selected second transmit beam set includes transmitting a beam recovery signal identifying the selected second transmit beam set. In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or combinations thereof. In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the synchronization signal includes the master PSS, SSS, PBCH signal, or combinations thereof. In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the DRX mode includes C-DRX mode.

[0031] A method for wireless communication is described. The method may include: transmitting a wake-up signal to a UE operating in DRX mode to wake the UE from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration; transmitting a set of signals using a second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof; and receiving an indication of a transmit beam from the second transmit beam set, the transmit beam being selected by the UE.

[0032] An apparatus for wireless communication is described. The apparatus may include: means for transmitting a wake-up signal to a UE operating in DRX mode to wake the UE from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration; means for transmitting a set of signals using a second transmit beam set, the signal set including a reference signal, or a synchronization signal, or a combination thereof; and means for receiving an indication of a transmit beam from the second transmit beam set, the transmit beam being selected by the UE.

[0033] Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions are operable to cause the processor to: transmit a wake-up signal to a UE operating in DRX mode to wake the UE from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration; transmit a set of signals using the second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof; and receive an indication of a transmit beam from the second transmit beam set, the transmit beam being selected by the UE.

[0034] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include instructions operable to cause a processor to perform the following operations: transmit a wake-up signal to a UE operating in DRX mode to wake the UE from a sleep state in DRX mode, the wake-up signal being transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration; transmit a set of signals using a second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof; and receive an indication of a transmit beam from the second transmit beam set, the transmit beam being selected by the UE.

[0035] Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for determining a beam management configuration for the UE to receive a second transmit beam set. Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for transmitting at least a portion of the beam management configuration using a wake-up signal.

[0036] Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for receiving an instruction for a second transmit beamset from the UE. Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for using the second transmit beamset to transmit a signal set, at least in part based on the received instruction for the second transmit beamset.

[0037] Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for encoding the signal set using a code rate that may be higher than the code rate used to encode the wake-up signal. Some examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for transmitting PDCCH, or resource grants, or downlink data, or combinations thereof, using an indicated transmit beam.

[0038] In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the number of second transmit beams may be greater than the number of first transmit beam sets. In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or combinations thereof. In some examples of the above-described methods, apparatuses, and non-transient computer-readable media, the synchronization signal includes PSS, SSS, PBCH signals, or combinations thereof.

[0039] A method for wireless communication is described. The method may include: receiving a wake-up signal while operating in DRX mode to wake a UE from a sleep state in DRX mode, the wake-up signal being transmitted by a base station using a first and a second transmit beam from a first transmit beam set according to a beam sweep configuration; receiving, at least in part, a set of signals transmitted by the base station using the second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof, based on the receipt of the wake-up signal; selecting a transmit beam from the second transmit beam set for the UE to use for receiving downlink transmissions from the base station; and transmitting an indication of the selected transmit beam to the base station.

[0040] An apparatus for wireless communication is described. The apparatus may include: means for receiving a wake-up signal while operating in DRX mode to wake a UE from a sleep state in DRX mode, the wake-up signal being transmitted by a base station using a first and a second transmit beam from a first transmit beam set according to a beam sweep configuration; means for receiving, at least in part, a set of signals transmitted by the base station using the second transmit beam set based on the received wake-up signal, the set of signals including a reference signal, or a synchronization signal, or a combination thereof; means for selecting a transmit beam from the second transmit beam set for the UE to use for receiving downlink transmissions from the base station; and means for transmitting an indication of the selected transmit beam to the base station.

[0041] Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions are operable to cause the processor to: receive a wake-up signal while operating in DRX mode to wake the UE from a sleep state in DRX mode, the wake-up signal being transmitted by a base station using a first and a second transmit beam from a first transmit beam set according to a beam sweep configuration; receive, at least in part, a set of signals transmitted by the base station using the second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof, based on the receipt of the wake-up signal; select a transmit beam from the second transmit beam set for the UE to use to receive downlink transmissions from the base station; and transmit an indication to the base station of the selected transmit beam.

[0042] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include instructions operable to cause a processor to perform the following operations: while operating in DRX mode, receiving a wake-up signal to wake a UE from a sleep state in DRX mode, the wake-up signal being transmitted by a base station using a first and a second transmit beam from a first transmit beam set according to a beam-sweeping configuration; receiving, at least in part, a set of signals transmitted by the base station using the second transmit beam set, the set of signals including a reference signal, or a synchronization signal, or a combination thereof, based on the receipt of the wake-up signal; selecting a transmit beam from the second transmit beam set for the UE to use for receiving downlink transmissions from the base station; and transmitting an indication to the base station of the selected transmit beam.

[0043] Some examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for: decoding the signal set, wherein the signal set can be encoded using a higher code rate than that used to encode a wake-up signal. Some examples of the above-described methods, apparatuses, and non-transient computer-readable media may further include processes, features, means, or instructions for: determining the signal quality associated with the decoded reference signal set, wherein the selection of the transmission beam may be based on a signal quality threshold.

[0044] Examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for receiving at least a portion of a beam management configuration for selecting a transmission beam from a second transmission beam set as part of a wake-up signal. Examples of the above-described methods, apparatus (devices), and non-transient computer-readable media may further include processes, features, means, or instructions for receiving downlink transmissions carried by a base station using the selected transmission beam, wherein the downlink transmissions include PDCCH, or resource grants, or downlink data, or combinations thereof.

[0045] In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or combinations thereof. In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the synchronization signal includes PSS, SSS, PBCH signals, or combinations thereof. In some examples of the methods, apparatuses, and non-transient computer-readable media described above, the number of second transmit beams may be greater than the number of first transmit beam sets.

[0046] A method for wireless communication is described. The method may include: receiving from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; selecting a transmit beam from the second set of transmit beams based at least in part on the received first set of signals; and transmitting to the base station an indication of the transmit beam selected from the second set of transmit beams.

[0047] An apparatus for wireless communication is described. The apparatus may include: means for receiving from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; means for selecting a transmit beam from the second set of transmit beams based at least in part on the received first set of signals; and means for transmitting to the base station an indication of the transmit beam selected from the second set of transmit beams.

[0048] Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions are operable to cause the processor to: receive from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; select a transmit beam from the second set of transmit beams based at least in part on the received first set of signals; and transmit to the base station an indication of the transmit beam selected from the second set of transmit beams.

[0049] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include instructions operable to cause a processor to perform the following operations: receiving from a base station a first set of signals from a first set of transmit beams and a second set of signals from a second set of transmit beams, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof; selecting a transmit beam from the second set of transmit beams based at least in part on the received first set of signals; and transmitting to the base station an indication of the transmit beam selected from the second set of transmit beams.

[0050] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described above, the reference signal includes transmitting an indication of a selected transmit beam, including transmitting a beam recovery signal identifying the selected transmit beam.

[0051] Some examples of the above-described methods, apparatus (devices) and non-transient computer-readable media may further include processes, features, means or instructions for: determining, for each transmit beam in a first transmit beam set, the signal quality associated with a first set of received signals, wherein the transmit beams are selected based on signal quality being below a signal quality threshold.

[0052] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described above may further include processes, features, means or instructions for receiving signals from a base station using a transmit beam selected from a second transmit beam set in response to a transmitted instruction.

[0053] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described above, the reference signal includes a demodulation reference signal (DMRS), a tracking reference signal (TRS), a phase compensation reference signal (PC-RS), or a channel state information reference signal (SCI-RS), or a combination thereof; and the synchronization signal includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a demodulation reference signal (DMRS), a physical broadcast channel (PBCH) signal, or a combination thereof.

[0054] In some examples of the above-described methods, apparatus, and non-transient computer-readable media, the first signal set includes a channel state information reference signal (CSI-RS), the method further includes, and the above-described methods, apparatus, and non-transient computer-readable media may further include processes, features, means, or instructions for: configuring the reception of periodic CSI-RS resources; and receiving at least one CSI-RS during a periodic CSI-RS resource.

[0055] Some examples of the above-described methods, apparatus (devices) and non-transient computer-readable media may further include processes, features, means or instructions for: determining that the signal quality associated with at least one received CSI-RS is below a signal quality threshold, wherein a second transmit beam set is selected at least in part based on the determination; and receiving a signal from a base station using at least one transmit beam from the second transmit beam set, at least in part based on the determination. Brief description of the attached diagram

[0057] Figure 1 Examples of wireless communication systems supporting beam management according to various aspects of this disclosure are explained.

[0058] Figures 2A to 2C Examples of wireless communication systems that support beam management for beam-sweep wake-up signals according to various aspects of this disclosure are explained.

[0059] Figures 3A to 3C Examples of wireless communication systems that support beam management for beam-sweep wake-up signals according to various aspects of this disclosure are explained.

[0060] Figures 4A to 4D Examples of wireless communication systems that support beam management for beam-sweep wake-up signals according to various aspects of this disclosure are explained.

[0061] Figure 5 The process flow of the system supporting beam management according to various aspects of this disclosure is explained.

[0062] Figures 6 to 8 A block diagram of a device supporting beam management according to various aspects of this disclosure is shown.

[0063] Figure 9 A block diagram of a system including a base station supporting beam management, based on various aspects of this disclosure, is explained.

[0064] Figures 10 to 12 A block diagram of a device supporting beam management according to various aspects of this disclosure is shown.

[0065] Figure 13 A block diagram of a system including a UE supporting beam management is explained according to various aspects of this disclosure.

[0066] Figures 14 to 20 Methods for beam management based on various aspects of this disclosure are explained.

[0067] Detailed description

[0068] Wireless devices can implement discontinuous reception (DRX) cycling to achieve efficient use of battery power for receiving downlink (DL) transmissions. The base station and user equipment (UE) can establish a radio resource control (RRC) connection, and the UE can enter a sleep state when inactively communicating. For example, during RRC connection establishment, DRX configurations, including the duration of DRX start and stop cycles, can be configured in the RRC connection establishment request or RRC connection reconfiguration request. The DRX configuration can determine how frequently the UE should be scheduled to wake up and receive DL data based on the configured DRX cycle duration.

[0069] Some wireless communication systems can support beamforming transmission between a base station and a UE. For example, wireless communication systems can operate in the mmW frequency range (e.g., 28 GHz, 40 GHz, 60 GHz, etc.). Wireless communication at mmW frequencies can be associated with increased signal attenuation (e.g., path loss), which can be affected by various factors (such as temperature, air pressure, diffraction, etc.). As a result, signal processing techniques (such as beamforming) can be used to coherently combine energy and overcome path loss at these frequencies. A base station can use several antenna ports associated with antenna rays for transmitting a directional receive beam and one or more beam reference signals (BRS) for beamforming DL transmission. Similarly, a UE can utilize beamforming for transmitting its directional receive beam and for uplink (UL) transmission to the base station. Accordingly, both the UE and the base station can use beamforming techniques for wake-up signal reception and transmission on one or more coarse transmit beams, and preemptively use beam management procedures for the refined transmit beams before physical downlink control channel (PDDCH) reception and transmission.

[0070] Depending on the DRX configuration at the UE, beamforming (e.g., beam-sweeping) data transmission and reception between the UE and the base station may include a procedure for establishing beam selection during the wake-up signal procedure, and beam refinement prior to the transmission of the Physical Downlink Control Channel (PDCCH). The wake-up signal may initiate a DRX activation cycle at the UE but does not include resource allocation or permission information. As a result, the wake-up signal can save decoding resources and reduce power consumption at the UE compared to the control channel mechanism. For example, the base station may transmit one or more beam-sweeping reference signals to the UE at least as a preemption indication for subsequent wake-up signal transmissions. In some cases, each of these reference signals may contain one or more synchronization signal (SS) bursts, channel state information reference signal (CSI-RS) bursts, or both. In other cases, each of these reference signals may contain one or more SS bursts with subsequent beam-sweeping paging transmissions that are distinct from the CSI-RS transmissions and have quasi-coexistence (QCL) antenna resources with the one or more SS bursts.

[0071] The UE can be pre-configured to monitor one or more coarse transmit beams for PDCCH decoding and data reception. The UE can receive beam-sweeped reference signal transmissions during the associated Transmission Time Interval (TTI) duration (e.g., symbol, time slot) for each transmit beam. The UE can evaluate and decode the reference signal transmissions on one or more pre-configured transmit beams and individually evaluate the signal quality on the pre-configured beams in a hierarchical manner. If at least one of the pre-configured beams is sufficient, the UE can abandon beam recovery signal transmission. Alternatively, the UE can locate an alternative beam for beam sweeping or an alternative beam with sufficient quality and provide UL beam recovery signal transmission on the located beam. The beam recovery signal transmission can convey an indication of the receive beam and / or beam management transmit beam index at the UE.

[0072] The base station can configure UL resources for beam recovery signal reception. This configuration may include training one or more receive beam sweeps. In some cases, the base station may not receive a beam recovery signal from the UE and may transmit a wake-up signal for the UE on a pre-configured transmit beam. Alternatively, the base station may receive a beam recovery signal from the UE and transmit a wake-up signal on one or more transmit beams as identified by the beam recovery signal.

[0073] The UE can receive a wake-up signal from the base station and initiate a DRX start loop. The base station can then receive a refined reference signal transmission on one or more refined transmit beams associated with the coarse beam of the wake-up signal transmission. The refined beam can represent a higher granularity level within the frequency range supported by the coarse transmit beam of the preceding DL transmission. The UE can then transmit a beam recovery signal on a selected refined transmit beam directed to the base station. The beam recovery signal can be frequency and / or time multiplexed with additional signaling (e.g., random channel (RACH) signaling).

[0074] The base station can receive beam recovery signals from the UE during the duration (e.g., symbol, time slot) of the associated transmission time interval (TTI) of the refined transmit beam. Based on the symbol period of the received signal, the base station can identify the refined transmit beam for DL ​​data transmission and directly transmit the complete PDCCH and DL traffic to the UE on that transmit beam. The described method allows the UE to improve message throughput between the UE and the base station. Furthermore, by using one or more wake-up signal transmissions, the UE can suppress full PDCCH decoding for the wake-up procedure, thereby improving power usage at the UE and extending battery life.

[0075] The following description provides examples and is not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and individual operations may be added, omitted, or combined. Furthermore, features described with reference to some examples may be combined in other examples.

[0076] The aspects of this disclosure are initially described in the context of wireless communication systems. The aspects of this disclosure are further explained and described by way of and with reference to apparatus diagrams, system diagrams, and flowcharts relating to beam management for beam-sweeping wake-up signals.

[0077] Figure 1 Examples of wireless communication system 100 according to various aspects of this disclosure are described. Wireless communication system 100 includes base station 105, UE 115, and core network 130. In some examples, wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, or a New Radio (NR) network. In some cases, wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low latency communication, or communication with low-cost and low-complexity devices.

[0078] Base station 105 can wirelessly communicate with UE 115 via one or more base station antennas. Base station 105 described herein may include, or may be referred to by those skilled in the art as, a base transceiver station, radio base station, access point, radio transceiver, B-node, evolved B-node (eNB), next-generation B-node, or gigabit B-node (any of which may be referred to as gNB), home B-node, home evolved B-node, or any other suitable term. Wireless communication system 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations). UE 115 described herein may be able to communicate with various types of base stations 105 and network equipment (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0079] Each base station 105 may be associated with a specific geographic coverage area 110, within which communication with various UEs 115 is supported. Each base station 105 may provide communication coverage to the corresponding geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communication link 125 shown in the wireless communication system 100 may include uplink transmission from the UE 115 to the base station 105, or downlink transmission from the base station 105 to the UE 115. Downlink transmission may also be referred to as forward link transmission, and uplink transmission may also be referred to as reverse link transmission.

[0080] The geographic coverage area 110 of base station 105 can be divided into sectors that constitute only a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage to macrocells, small cells, hotspots, or other types of cells, or various combinations thereof. In some examples, base station 105 can be mobile and thus provide communication coverage to mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or different base stations 105. The wireless communication system 100 can include, for example, heterogeneous LTE / LTE-A or NR networks, where different types of base stations 105 provide coverage to various geographic coverage areas 110.

[0081] The term "cell" refers to a logical communication entity used to communicate with base station 105 (e.g., on a carrier) and may be associated with identifiers to distinguish adjacent cells operating via the same or different carriers (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)). In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types that can provide access for different types of devices (e.g., Machine-Type Communication (MTC), Narrowband Internet of Things (NB-IoT), Enhanced Mobile Broadband (eMBB), or others). In some cases, the term "cell" may refer to a portion (e.g., a sector) of the geographical coverage area 110 on which the logical entity operates.

[0082] Each UE 115 may be distributed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client. UE 115 may also be a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may also refer to a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or MTC device, which can be implemented in various items such as appliances, vehicles, and instruments.

[0083] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated machine-to-machine communication (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that have integrated sensors or meters to measure or capture information and relay that information to a central server or application that can utilize the information or present it to people interacting with the program or application. Some UE 115 devices may be designed to collect information or enable automated machine behavior. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0084] Some UEs 115 can be configured to operate in reduced-power modes, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication can be performed at a reduced peak rate. Other power-saving techniques for UE 115 include entering a power-saving "deep sleep" mode when not engaged in active communication, or operating on limited bandwidth (e.g., according to narrowband communication). In some cases, UE 115 can be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 can be configured to provide ultra-reliable communication for these functions.

[0085] In some scenarios, UE 115 may also be able to communicate directly with other UE 115s (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UEs in a group of UEs 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115s in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some scenarios, groups of UEs 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some scenarios, base station 105 facilitates the scheduling of resources for D2D communication. In other scenarios, D2D communication is performed between UEs 115s without involving base station 105.

[0086] Each base station 105 can communicate with the core network 130 and with each other. For example, base station 105 can interface with the core network 130 via backhaul link 132 (e.g., via S1 or other interfaces). Base stations 105 can communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130) on backhaul link 134 (e.g., via X2 or other interfaces).

[0087] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC), which may include at least one Mobility Management Entity (MME), at least one Serving Gateway (S-GW), and at least one Packet Data Network (PDN) Gateway (P-GW). The MME manages non-access stratum (e.g., control plane) functions, such as mobility, authentication, and bearer management of UE 115 served by base station 105 associated with the EPC. User IP packets can be delivered via the S-GW, which itself can connect to the P-GW. The P-GW provides IP address allocation and other functions. The P-GW can connect to network operator IP services. Operator IP services may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched (PS) streaming services.

[0088] At least some network devices (such as base station 105) may include sub-components, such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with each UE 115 through several other access network transport entities, which may be referred to as a radio headend, a smart radio headend, or a transmit / receive point (TRP). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio headends and access network controllers) or combined into a single network device (e.g., base station 105).

[0089] Wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. Generally, the 300 MHz to 3 GHz region is referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features. However, this wave can penetrate various structures sufficiently for macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0090] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band). The SHF region includes frequency bands that can be used opportunistically by devices capable of tolerating interference from other users (such as the 5 GHz Industrial, Scientific and Medical (ISM) band).

[0091] The wireless communication system 100 can also operate in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be even smaller and more closely spaced than UHF antennas. In some cases, this can facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may suffer from even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein can be employed across transmissions using one or more different frequency regions, and the frequency band usage specified across these frequency regions may vary by country or regulatory authority.

[0092] In some scenarios, wireless communication system 100 may utilize both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may employ License-Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (such as the 5 GHz ISM band). When operating in unlicensed radio spectrum bands, wireless devices (such as base station 105 and UE 115) may employ a Listen-Before-Talk (LBT) protocol to ensure the frequency channel is open before transmitting data. In some scenarios, operation in unlicensed frequency bands may be coordinated with CC operation in licensed frequency bands based on CA configuration (e.g., LAA). Operation in unlicensed spectrum may include downlink transmission, uplink transmission, peer-to-peer transmission, or a combination thereof. Duplexing in unlicensed spectrum may be based on Frequency Division Duplex (FDD), Time Division Duplex (TDD), or a combination thereof.

[0093] In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, a wireless communication system may use a transmission scheme between a transmitting device (e.g., base station 105) and a receiving device (e.g., UE 115), where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of these multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0094] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105 or UE 115) to shape or guide an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array, such that signals propagating relative to a particular orientation of the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include the transmitting or receiving device applying specific amplitude and phase shifts to the signals carried via each antenna element associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device, or relative to some other orientation).

[0095] In one example, base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions, and these signals may include signals transmitted according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions can be used (e.g., by base station 105 or receiving devices, such as UE 115) to identify the beam direction used by base station 105 for subsequent transmission and / or reception. Some signals (e.g., data signals associated with a particular receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device, such as UE 115). In some examples, the beam direction associated with transmission along a single beam direction may be determined at least in part based on the signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signals it received with the highest signal quality or other acceptable signal quality. Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction used by UE 115 for subsequent transmission or reception) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0096] A receiver device (e.g., UE 115, which may be an example of an mmW receiver device) may attempt multiple receive beams when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiver device may attempt multiple reception directions by: receiving via different antenna subarrays; processing the received signal according to different antenna subarrays; receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array; or processing the received signal according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as “listening” according to different receive beams or reception directions. In some examples, the receiver device may use a single receive beam to receive along a single beam direction (e.g., when a data signal is received). A single receiving beam can be aligned on a beam direction determined at least in part based on listening to different receiving beam directions (e.g., a beam direction determined at least in part based on listening to multiple beam directions to have the highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality).

[0097] In some cases, the antennas of base station 105 or UE 115 may be located within one or more antenna arrays that support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may coexist at an antenna assembly (such as an antenna tower). In some cases, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that support various MIMO or beamforming operations.

[0098] In some scenarios, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. In some scenarios, the Radio Link Control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use Hybrid Automatic Repeat Request (HARQ) to provide MAC layer retransmissions, thereby improving link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide the establishment, configuration, and maintenance of RRC connections between the UE 115 and the base station 105 or core network 130 that support user plane data radio bearers. At the physical (PHY) layer, transport channels may be mapped to physical channels.

[0099] In some scenarios, UE 115 and base station 105 may support data retransmission to increase the likelihood of successful data reception. HARQ feedback is a technique that increases the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput in poor radio conditions (e.g., signal-to-noise ratio conditions). In some scenarios, the wireless device may support simultaneous time-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in a previous symbol within that time slot. In other scenarios, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

[0100] The time interval in LTE or NR can be represented by a basic time unit (which may, for example, refer to the sampling period T). s = 1 / 30,720,000 seconds) is used as a multiple. The time interval of communication resources can be organized according to radio frames, each with a duration of 10 milliseconds (ms), where the frame period can be expressed as T. f =307,200T s Radio frames can be identified by System Frame Numbers (SFNs) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. Subframes may be further divided into two time slots, each with a duration of 0.5 ms, where each time slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the smallest scheduling unit of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In other cases, the smallest scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst with a shortened TTI (sTTI) or in a selected component carrier using an sTTI).

[0101] In some wireless communication systems, time slots can be further divided into multiple mini-time slots containing one or more symbols. In some instances, the symbol or sub-time slot of a sub-time slot can be the smallest scheduling unit. For example, the duration of each symbol may vary depending on the subcarrier spacing or operating frequency band. Furthermore, some wireless communication systems can implement time slot aggregation, where multiple time slots or mini-time slots are aggregated together and used for communication between UE 115 and base station 105.

[0102] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications on communication link 125. For example, a carrier of communication link 125 may include a portion of a radio spectrum band operating according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. Carriers may be associated with predefined frequency channels (e.g., E-UTRA Absolute Radio Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or configured to carry both downlink and uplink communications (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or DFT-s-OFDM).

[0103] The organization of a carrier can vary depending on the radio access technology (e.g., LTE, LTE-A, NR, etc.). For example, communication on a carrier can be organized according to a TTI or time slot, each of which may include user data and control information or signaling supporting the decoding of the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling coordinating carrier operation. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling coordinating the operation of other carriers.

[0104] Physical channels can be multiplexed on a carrier using various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM), frequency division multiplexing (FDM), or a hybrid TDM-FDM technique. In some examples, control information transmitted in the physical control channel can be distributed in a cascaded manner between different control regions (e.g., between a shared control region or shared search space and one or more UE-specific control regions or UE-specific search spaces).

[0105] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, this carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 may be configured to operate on a portion or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type associated with a predefined portion or range within the carrier (e.g., a set of subcarriers or RBs) (e.g., “in-band” deployment of a narrowband protocol type).

[0106] In systems employing MCM technology, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements UE 115 receives and the higher the order of the modulation scheme, the higher the data rate UE 115 can achieve. In MIMO systems, wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers), and using multiple spatial layers can further improve the data rate of communication with UE 115.

[0107] The devices of the wireless communication system 100 (e.g., base station 105 or UE 115) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on a single carrier bandwidth within a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 and / or a UE capable of supporting simultaneous communication via carriers associated with more than one different carrier bandwidth.

[0108] The wireless communication system 100 can support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation. The UE 115 may be configured with multiple downlink CCs and one or more uplink CCs depending on the carrier aggregation configuration. Carrier aggregation can be used in conjunction with both FDD and TDD component carriers.

[0109] In some scenarios, the wireless communication system 100 may utilize enhanced component carrier (eCC). eCC can be characterized by one or more features, including a wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or a modified control channel configuration. In some scenarios, eCC may be associated with carrier aggregation configurations or dual connectivity configurations (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). eCC can also be configured for use in unlicensed or shared spectrum (e.g., where more than one operator is permitted to use the spectrum). eCC characterized by a wide carrier bandwidth may include one or more segments that can be utilized by a UE 115 that is unable to monitor the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0110] In some cases, eCC may utilize symbol durations different from other CCs, which may include using a reduced symbol duration compared to other CCs. A shorter symbol duration may be associated with increased spacing between adjacent subcarriers. Devices utilizing eCC (such as UE 115 or base station 105) can transmit wideband signals (e.g., based on frequency channels or carrier bandwidths of 20, 40, 60, or 80 MHz) with a reduced symbol duration (e.g., 16.67 microseconds). The TTI in eCC may include one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in the TTI) may be variable.

[0111] Wireless communication systems (such as NR systems) can utilize any combination of licensed, shared, and unlicensed frequency bands. The flexibility of eCC symbol duration and subcarrier spacing allows eCC to be used across multiple spectrums. In some examples, NR spectrum sharing can increase spectrum utilization and efficiency, particularly through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

[0112] The PDCCH carries downlink control information (DCI) in control channel elements (CCEs). These CCEs can consist of nine logically contiguous resource element groups (REGs), each containing four resource elements (REs). The DCI includes information about downlink scheduling assignment, uplink resource allocation, transmission schemes, uplink power control, HARQ information, modulation and coding schemes (MCS), and other information. The size and format of the DCI message can vary depending on the type and amount of information carried. For example, if spatial multiplexing is supported, the DCI message size is larger than the adjacent frequency allocation. Similarly, for systems employing MIMO, the DCI must include additional signaling information. The size and format of the DCI depend on the amount of information and factors such as bandwidth, number of antenna ports, and duplex mode.

[0113] The PDCCH can carry DCI messages associated with multiple users, and each UE 115 can decode the DCI messages intended for it. For example, each UE 115 can be assigned a C-RNTI, and the CRC bits attached to each DCI can be scrambled based on the C-RNTI. To reduce power consumption and overhead at the user equipment, a limited set of Control Channel Elements (CCE) locations can be specified for the DCIs associated with a particular UE 115. CCEs can be grouped (e.g., groups of 1, 2, 4, and 8 CCEs), and the set of CCE locations in which the user equipment can find the associated DCI can be specified. These CCEs can be referred to as the search space. The search space can be divided into two areas: a shared CCE area or search space and a UE-specific (dedicated) CCE area or search space. The shared CCE area is monitored by all UEs 115 served by base station 105 and can include information such as paging information, system information, random access procedures, etc. The UE-specific search space can include user-specific control information. CCEs can be indexed, and the shared search space can start, for example, from CCE 0. The starting index of the search space, which varies from UE to UE, can depend on the C-RNTI, subframe index, CCE aggregation level, and random seed. UE 115 can attempt to decode DCIs by performing a process called blind decoding, during which the search space is randomly decoded until a DCI is detected. During blind decoding, UE 115 can attempt to descramble all potential DCI messages using its C-RNTI and perform a CRC check to determine if the attempt was successful.

[0114] Synchronization (e.g., cell capture) can be performed using synchronization signals or channels transmitted by a network entity (e.g., base station 105). In some cases, base station 105 may transmit a synchronization signal (SS) block (which may be referred to as an SS burst) containing a discovery reference signal. For example, an SS block may include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), or other synchronization signals (e.g., a third-level synchronization signal (TSS)). In some examples, the signals included in an SS block may include time-division multiplexed PSS, SSS, PBCH, and / or other synchronization signals. For example, the signals included in an SS block may include time-division multiplexed first PBCH, SSS, second PBCH, and PSS (transmitted in a specified order), or time-division multiplexed first PBCH, SSS, PSSS, and second PBCH (transmitted in a specified order), and so on. In other examples, PBCH transmission can be carried out in a subset of SS block time resources (e.g., in two symbols of an SS block), while synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)) can be carried out in another subset of SS block time resources. Furthermore, in deployments using millimeter-wave (mmW) transmission frequencies, multiple SS blocks can be transmitted in different directions using beam sweeping within SS bursts, and SS bursts can be transmitted periodically according to the SS burst set. In cases where base station 105 can transmit omnidirectionally, SS blocks can be transmitted periodically according to a configured periodicity.

[0115] For example, base station 105 may transmit multiple instances of SS blocks on different beams during the periodic broadcast channel transmission time interval (BCH TTI). In other cases, base station 105 may transmit multiple instances of SS blocks on the same beam or in an omnidirectional manner during the periodic BCH TTI. UE 115 attempting to access the wireless network can perform an initial cell search by detecting the PSS from base station 105. The PSS enables symbol timing synchronization and indicates physical layer identity values. The PSS can be used to capture timing and frequency, as well as the physical layer identifier. UE 115 can then receive the SSS. The SSS enables radio frame synchronization and provides a cell group identity value. The cell group identity value can be combined with the physical layer identifier to form a physical cell identifier (PCID) that identifies the cell. The SSS also enables detection of duplex mode and cyclic prefix (CP) length. The SSS can be used to capture other system information (e.g., subframe index). The PBCH can be used to obtain additional system information required for capture (e.g., bandwidth, frame index, etc.). In some cases, the PBCH may carry a Master Information Block (MIB) and one or more System Information Blocks (SIBs) for a given cell.

[0116] Because base station 105 may not know the location of the device attempting to synchronize with the base station's cell, SS blocks can be transmitted continuously in a beam-sweeping manner (e.g., across multiple symbol periods). In some cases, base station 105 may use more transmit beams to transmit SS blocks. UE 115 can receive one or more SS blocks and determine an appropriate downlink beam pair (e.g., based on the signal quality of SS blocks exceeding a threshold). However, the beam over which SS blocks are transmitted can be relatively coarse (e.g., wide). Accordingly, communication between UE 115 and base station 105 can benefit from beam refinement, where narrower uplink and downlink receive and transmit beams are selected. The width of a given beam (e.g., narrow beam, wide beam, etc.) can be modified by adjusting the weights of one or more elements in the transmit or receive antenna array. Such adjustments can be determined empirically by the receiving device (e.g., based on measurements of one or more reference signals). Each UE 115 attempting to access a given cell can receive a downlink reference signal set and transmit an uplink reference signal set to achieve this type of beamfinding.

[0117] In some scenarios, the UE 115 receiving the SS block can perform cell measurements on the SS block and can also capture the network associated with the base station transmitting the SS block. In order to determine the beam on which the SS block is transmitted, or to determine the timing of the SS block within the SS block sequence (and in some cases, to fully determine the timing of the SS block or the synchronization signal therein), the UE 115 may have to decode the PBCH within the SS block and obtain the SS block index from the SS block (e.g., because the SS block index can convey the beam index associated with the SS block and / or the position of the SS block within the SS block sequence).

[0118] In some cases, base station 105 may transmit a wake-up signal to UE 115 based at least in part on parameters transmitted by a background beam management procedure. The parameters of the wake-up signal may include a digital sequence or code that distinguishes the wake-up signal from ambient radio transmissions or other interference. The wake-up signal may include one or more pseudo-omnidirectional beams for transmission, and additionally or alternatively may include several beams equal to the beam base number for SS burst transmission. Additionally, the wake-up signal may include instructions for initiating a wake-up procedure without additional resource allocation or payload granting. In some cases, the wake-up signal may include narrowband frequency modulation. UE 115 may determine the presence or absence of narrowband frequency modulation by energy detection via an energy detector. In other cases, the wake-up signal may include a UE-specific reference signal directed to UE 115. UE 115 may descramble the frequency modulation transmitted by the reference signal according to a correlator. In other cases, the wake-up signal may include a narrowband PDCCH signal communicated through a specific search space indicated to UE 115. One or more wake-up signals can save decoding resources at UE115 and thus reduce power consumption.

[0119] In some scenarios, UE 115 may continuously monitor communication link 125 for indications that UE 115 can receive data. In other scenarios (e.g., to save power and extend battery life), UE 115 may be configured with DRX cycles. A DRX cycle includes an "on duration" of control information that UE 115 can monitor (e.g., on the PDCCH) and a "DRX period" during which UE 115 can power off radio components. In some scenarios, UE 115 may be configured with both short and long DRX cycles. In some scenarios, UE 115 may enter a long DRX cycle while it is inactive for one or more short DRX cycles. The transition between short DRX cycles, long DRX cycles, and continuous reception may be controlled by an internal timer or by message transmission from base station 105. UE 115 may receive scheduling messages on the PDCCH during the on duration. While monitoring the PDCCH for scheduling messages, UE 115 may initiate a "DRX inactivity timer". If a scheduling message is successfully received, UE 115 can prepare to receive data and the DRX inactive timer can be reset. When the DRX inactive timer expires without receiving a scheduling message, UE 115 can move to a short DRX cycle and start a "DRX short cycle timer". When the DRX short cycle timer expires, UE 115 can resume a long DRX cycle.

[0120] In wireless communication system 100, devices may be able to communicate simultaneously on multiple portions of the system bandwidth. Such a configuration can improve communication throughput or otherwise benefit the system. However, because transmissions on different bandwidth portions may traverse different paths (e.g., may be transmitted from different antennas, experience different degrees of path loss, be received on different antennas, etc.), the receiving device may have to process these transmissions independently (e.g., it may not be possible to utilize signal processing on an antenna port on one subband to facilitate processing on a quasi-coexisting (QCL) antenna port on another subband). In other cases, a QCL relationship may be assumed between two or more antenna ports. That is, UE 115 may be able to derive properties of the first channel transmitted on the first antenna port (e.g., delay spread, Doppler spread, frequency shift, average power, etc.) from measurements taken on a second channel transmitted on a second antenna port. Furthermore, base station 105 can signal an indication of the QCL relationship (e.g., spatial relationship, etc.) between two portions of the bandwidth (e.g., which may be referred to herein as carriers or subbands) to allow UE 115 to transmit (or receive) a second signal in the second portion of the bandwidth, at least in part, based on the processing of the first signal received in the first portion of the bandwidth. In some cases, utilizing the QCL relationship (or reciprocal QCL relationship) can reduce the overhead of the radio system.

[0121] The wireless communication system 100 can support C-DRX wake-up procedures on mmW band resources. Each of the base station 105 and UE 115 can use multiple antenna ports associated with rays for transmitting one or more transmit beams (e.g., BRS) for data transmission and reception via beamforming (e.g., beam sweeping). For example, base station 105 can use beamforming technology for downlink (DL) reference signals, wake-up signals, PDCCH, and physical downlink shared channel (PDSCH) transmissions to one or more configured UEs 115. Similarly, UE 115 can implement beamforming technology for receive beam training, DL transmit beam selection, and UL transmission including beam recovery signal transmission.

[0122] Each of one or more UEs 115 within the wireless communication system 100 may camp on a geographical coverage area 110 associated with a base station 105. The one or more UEs 115 may establish an RRC connection with the associated base station 105. During RRC connection establishment, the one or more UEs 115 may implement DRX configuration to achieve efficient battery usage for receiving DL data. DRX configuration, including the duration of DRX enable and disable cycles, can be configured at the UE 115 via an RRC connection establishment request for RRC connection reconfiguration. The DRX configuration can determine how frequently the one or more UEs 115 should be scheduled to wake up and receive DL data based on the configured DRX cycle duration.

[0123] Figures 2A to 2C Examples of wireless communication systems 200-a, 200-b, and 200-c supporting beam management for beam-sweep wake-up signals according to various aspects of this disclosure are described. In some examples, wireless communication systems 200-a to 200-c may implement various aspects and features of wireless communication system 100. For example, wireless communication systems 200-a to 200-c include base station 105-a and UE 115-a. Base station 105-a may be a reference... Figure 1 The example of base station 105 is described, and it can perform receive beam refinement and beam-sweep DL reference signal and wake-up signal transmission. UE 115-a can be a reference. Figure 1 The example of UE115 is described, and it can perform receive beam refinement and transmit UL beam recovery signaling. UE 115-a can implement DRX configuration based on RRC connection establishment and perform scheduled DRX start cycle duration to monitor PDCCH subframes on system resources.

[0124] like Figure 2AAs explained, base station 105-a can implement various procedures to convey one or more reference signal indications and wake-up signal transmissions to UE 115-a. Base station 105-a can transmit one or more reference signals to UE 115-a, at least as a preemptive indication of subsequent wake-up signal transmissions on a configured coarse transmit beam. In such cases, base station 105-a can transmit these reference signals via multiple transmit beams 205 (e.g., included in one or more beam-sweep transmissions). Each transmit beam 205 may correspond to a TTI 210. For example, a first transmit beam 205-a may correspond to a first TTI 210-a, a second transmit beam 205-b may correspond to a second TTI 210-b, and so on. The reference signals can at least provide a reference point for downlink power on channel resources. Additionally, these reference signals may be specific to UE 115-a or specific to the geographical coverage area 110-a where UE 115-a resides.

[0125] In some cases, each of the reference signals may contain one or more SS bursts (or SS blocks), tracking reference signal (TRS) bursts, phase-compensated reference signal (PC-RS) bursts, channel state information reference signal (CSI-RS) bursts, or any combination thereof. Each of these bursts may have a configurable periodicity (e.g., 5, 10, 20, 40, 80, 160 ms). These SS bursts may be independent of the channel bandwidth and contain one or more PSS symbols, SSS symbols, and PBCH symbols. For example, a single SS burst may contain one PSS symbol, one SSS symbol, and two PBCH symbols containing a demodulation reference signal (DMRS) sequence.

[0126] In other cases, each of these reference signals may contain one or more SS bursts having a beam-sweeping paging transmission distinct from the CSI-RS transmission and associated with the antenna resource QCL of the one or more SS bursts. The quasi-coexistence relationship between one or more beam transmissions may refer to the spatial relationship between the antenna ports (and corresponding signaling beams) of the respective transmissions. For example, base station 105-a may implement one or more antenna ports for transmitting at least one or more reference signals and command information transmissions (e.g., C-RNTI) to UE 115-a. However, the channel properties of signals transmitted via different antenna ports may be interpreted as identical (e.g., even though these signals are transmitted from different antenna ports), and these antenna ports (and corresponding beams) may be identified as QCL. In such cases, UE 115-a may have corresponding antenna ports to transmit receive beams used for receiving transmissions (e.g., reference signals, C-RNTI) of the QCL. SS bursts may contain one or more PSS, SSS, and PBCH symbols, and the PBCH symbols may contain DMRS sequences. Base station 105-a can be configured to paging transmissions such that the transmission is multiplexed with one or more SS bursts, or the paging transmission can be scheduled as a follow-up instruction after an SS burst transmission.

[0127] UE 115-a can receive reference signal transmissions within a set of Transmission Time Intervals (TTIs) (e.g., symbols, time slots) 210. Each TTI 210 may correspond to a transmit beam of the received reference signal transmission. In some cases, UE 115-a may be pre-configured to sequentially and individually monitor one or more coarse transmit beams of DL transmissions for PDCCH decoding and data reception. UE 115-a can sequentially evaluate and decode transmissions during TTI 210 associated with each pre-configured coarse transmit beam 205 and evaluate the signal quality of each pre-configured beam in a hierarchical manner. For example, in some cases, UE 115-a can evaluate an initial pre-configured transmit beam (e.g., the main transmit beam) and determine that the signal quality of that beam is sufficient. Based at least in part on transmit beam sufficiency, UE 115-a may choose to abandon additional transmit beam evaluations and suspend beam recovery signal transmission to the base station. In other scenarios, UE 115-a can evaluate the initial pre-configured transmit beam (e.g., the primary transmit beam) and determine that the link quality of the primary beam has degraded below a pre-configured threshold. UE 115-a can then evaluate subsequent pre-configured transmit beams (e.g., secondary transmit beams) and determine that the signal quality of the secondary beams is sufficient. Similarly, UE 115-a may choose to abandon additional transmit beam evaluation and suspend beam recovery signal transmission to the base station.

[0128] like Figure 2BAs explained, base station 105-a can train one or more receive beams 215 for UL beam recovery signal reception. Receive beams 215 can be transmitted in a beam-sweeping manner, and each receive beam can be associated with a TTI 220. At least in part based on the abandonment of beam recovery signal transmission at UE 115-a, base station 105-a may not receive UL signaling from UE 115-a within a specified duration. At least in part based on the lack of beam recovery signal reception, base station 105-a can maintain UE 115-a's pre-configured transmit beams for wake-up signal transmission.

[0129] like Figure 2C As explained, base station 105-a can transmit a wake-up signal to UE 115-a via coarse transmit beam 205. UE 115-a can receive the selected coarse transmit beam 205 and decode and interpret the wake-up signal transmission within the corresponding TTI 220 associated with the preferred transmit beam 205. For example, UE 115-a can decode and interpret the wake-up signal transmission during the third TTI 210-c and the fourth TTI 210-d based on identifying the third transmit beam 205-c and the fourth transmit beam 205-d as preferred transmit beams. UE 115-a can interpret this reception as a wake-up signal indication and initiate DRX enable configuration for subsequent PDCCH and DL data transmission.

[0130] Figures 3A to 3C Examples of wireless communication systems 300-a, 300-b, and 300-c supporting beam management for beam-sweep wake-up signals according to various aspects of this disclosure are explained. In some examples, wireless communication systems 300-a to 300-c may implement various aspects of the technology performed by one or more base stations 105 and one or more UEs 115. Base station 105-a may be a reference Figures 1 to 2C Examples of base stations 105 and 105-a are described, and they can perform receive beamfinding and beam-sweep DL reference signal and wake-up signal transmission. UE 115-a can be a reference. Figures 1 to 2C The description includes an example of UE 115-a, which can perform receive beam refinement and transmit UL beam recovery signaling. UE 115-a can implement DRX configuration based on RRC connection establishment and perform scheduled DRX start cycle duration to monitor PDCCH subframes on system resources.

[0131] like Figure 3AAs explained, base station 105-a can implement various procedures to convey one or more reference signal indications and wake-up signal transmissions to UE 115-a. Base station 105-a can transmit one or more reference signals to the UE, at least as a preemptive indication of subsequent wake-up signal transmissions on a configured coarse transmit beam. In such cases, base station 105-a can transmit these reference signals via multiple transmit beams 205 (e.g., including BRSs contained within one or more beam-sweep transmissions). Each transmit beam 205 may correspond to a TTI 210. For example, a first transmit beam 205-a may correspond to a first TTI 210-a, a second transmit beam 205-b may correspond to a second TTI 210-b, and so on. The reference signals can at least provide a reference point for downlink power on channel resources. Additionally, these reference signals may be specific to UE 115-a or specific to the geographical coverage area 110-a where UE 115-a resides.

[0132] In some cases, each of these reference signals may contain one or more SS bursts (or SS blocks), TRS bursts, PC-RS bursts, or CSI-RS bursts, or both. Each of these bursts may have a configurable periodicity (e.g., 5, 10, 20, 40, 80, 160 ms). These SS bursts may be independent of the channel bandwidth and contain one or more PSS symbols, SSS symbols, and PBCH symbols. For example, a single SS burst may contain one PSS symbol, one SSS symbol, and two PBCH symbols containing a demodulated reference signal (DMRS) sequence.

[0133] In other cases, each of these reference signals may contain one or more SS bursts having a beam-sweeping paging transmission distinct from the CSI-RS transmission and associated with the antenna resource QCL of the one or more SS bursts. The quasi-coexistence relationship between one or more beam transmissions may refer to the spatial relationship between the antenna ports (and corresponding signaling beams) of the respective transmissions. For example, base station 105-a may implement one or more antenna ports for transmitting at least one or more reference signals and command information transmissions (e.g., C-RNTI) to UE 115-a. However, the channel properties of signals transmitted via different antenna ports may be interpreted as identical (e.g., even though these signals are transmitted from different antenna ports), and these antenna ports (and corresponding beams) may be identified as QCL. In such cases, UE 115-a may have corresponding antenna ports to transmit receive beams used for receiving transmissions (e.g., reference signals, C-RNTI) of the QCL. SS bursts may contain one or more PSS, SSS, and PBCH symbols, and the PBCH symbols may contain DMRS sequences. Base station 105-a can be configured to paging transmissions such that the transmission is multiplexed with one or more SS bursts, or the paging transmission can be scheduled as a follow-up instruction after an SS burst transmission.

[0134] UE 115-a can receive reference signal transmissions within a set of TTI durations (e.g., symbols, time slots) 210. Each TTI 210 may correspond to a transmit beam of the received reference signal transmission. In some cases, UE 115-a may be pre-configured to sequentially and individually monitor one or more coarse transmit beams of DL transmissions for PDCCH decoding and data reception. UE 115-a can sequentially evaluate and decode transmissions within TTI 210 associated with each pre-configured coarse transmit beam 205, and evaluate the signal quality of each pre-configured beam in a hierarchical manner. For example, UE 115-a can evaluate an initial pre-configured transmit beam (e.g., the main transmit beam) and determine that the link quality of the main beam has degraded below a pre-configured threshold. UE 115-a can then sequentially evaluate the quality of each subsequent pre-configured transmit beam (e.g., a sub-transmit beam) and similarly individually determine that the link quality of each sub-beam has degraded below a pre-configured threshold. UE 115-a can locate one or more alternative transmit beams 205 for transmit beam sweep and determine that one or more unconfigured beams 205 have sufficient quality for message reception.

[0135] like Figure 3BAs explained, UE 115-a can transmit UL beam recovery signal transmission to base station 105-a via one or more selected transmit beams 305. Base station 105-a can train one or more receive beams 215 for UL beam recovery signal reception. Receive beams 215 can be transmitted in a beam-sweeping manner. Base station 105-a can receive the UL transmission containing transmit beams 305 on the associated receive beam 215. Base station 105-a can decode and interpret the UL transmission during the corresponding TTI 220 of the associated receive beam 215. Based at least in part on the implemented receive beams 215, base station 105-a can identify the transmit beam selected by UE 115-a for wake-up signal transmission.

[0136] like Figure 3C As explained, base station 105-a can transmit a wake-up signal to UE 115-a via a coarse transmit beam 205 selected by the UE. The transmit beam 205 may directly correspond to the implemented receive beam 215. UE 115-a can receive the selected coarse beam 205 and decode and interpret the wake-up signal transmission within the corresponding TTI 220 associated with the preferred transmit beam 205. For example, UE 115-a can decode and interpret the wake-up signal transmission during the third TTI 210-c and the fifth TTI 210-e based on identifying the third transmit beam 205-c and the fifth transmit beam 205-e as preferred transmit beams. UE 115-a can interpret this reception as a wake-up signal indication and initiate DRX enable configuration for subsequent PDCCH and DL data transmission.

[0137] Figures 4A to 4D Examples of wireless communication systems 400-a, 400-b, 400-c, and 400-d supporting beam management for beam-sweeping wake-up signals according to various aspects of this disclosure are described. In some examples, wireless communication systems 400-a, 400-b, 400-c, and 400-d can be implemented as described in reference... Figures 2A to 3C The description covers various aspects of the techniques employed by one or more base stations 105 and one or more UEs 115. Wireless communication systems 400-a to 400-d explain the techniques for hierarchical beam management procedures following DL wake-up signal transmission.

[0138] like Figure 4AAs explained, base station 105-a can transmit a DL wake-up signal to UE 115-a via one or more selected coarse transmit beams 205. The coarse transmit beams 205 may include one or more transmit beams pre-configured at UE 115-a, or one or more transmit beams selected based on the preemptive reference signal reception and beam recovery signal transmission at UE 115-a. Each transmit beam 205 may correspond to a TTI 210. For example, a third transmit beam 205-c may correspond to a third TTI 210-c, and a fourth transmit beam 205-e may correspond to a fourth TTI 210-d. The wake-up signal may contain a complete or partial configuration for beam management, including indications regarding the transmission of refined beam management procedures. In the case where a complete beam management configuration is transmitted using the wake-up signal, UE 115-a may provide base station 105-a with an indication to abandon the beam refinement procedure and initiate PDCCH transmission. Alternatively, base station 105-a can provide a portion of the wake-up signal transmission and subsequent reference signal indication on a refined set of transmit beams. In some cases, UE 115-a can receive the wake-up signal transmission and evaluate and decode the main transmit beam 205 during the associated TTI 210 of the beam. In cases where the main transmit beam has been degraded, UE 115-a can subsequently evaluate and decode the sub-transmit beam 205 during the associated TTI 210 of the beam. Based at least in part on the evaluation of the wake-up signal, UE 115-a can initiate a DRX activation cycle.

[0139] like Figure 4BAs explained, base station 105-a can execute a refined beam management procedure during the DRX activation cycle duration. Base station 105-a can transmit a refined reference signal beam sweep to UE 115-a. The refined beam sweep may include one or more refined transmit beams 405 spanning the frequency resources of the coarse transmit beam 205. The number of refined transmit beams 405 may exceed the number of coarse beams used for wake-up signal transmission and may not share common beams with the coarse transmit beams. In some cases, the refined transmit beam 405 may contain one or more SS bursts or CSI-RS burst indications. In other cases, the refined transmit beam 405 may contain one or more SS bursts with subsequent beam-sweep paging transmissions that are different from CSI-RS transmissions and connected to the antenna resource QCL of the one or more SS bursts. UE 115-a can receive beam-sweep reference signal transmissions on one or more refined transmit beams 405 and evaluate and interpret transmissions within associated refined TTIs 410 related to the transmit beams. Each refined transmit beam 405 may correspond to a refined TTI 410. For example, a first refined transmit beam 405-a may correspond to a first refined TTI 410-a, a second refined transmit beam 405-b may correspond to a second refined TTI 410-b, and so on. In some cases, the duration of a refined TTI 410 is shorter than the duration of a TTI 210.

[0140] like Figure 4C As explained, UE 115-a can transmit a UL beam recovery signal to the base station on one of the identified transmit beams of a refined reference signal transmission. Base station 105-a can train one or more refined receive beams 415 for receiving the UL beam recovery signal. Receive beams 415 can be transmitted in a beam-sweeping manner. Base station 105-a can receive the UL transmission containing transmit beam 425 on the associated receive beam 415. Base station 105-a can decode and interpret the UL transmission within the TTI 420 associated with the receive beam 415. Based at least in part on the implemented receive beam 415, base station 105-a can identify the beam response signal indicated in the transmit beam 425.

[0141] like Figure 4DAs explained, base station 105-a can transmit DL data, including the complete PDCCH and DL traffic payload, to UE 115-a on a refined transmit beam 405 selected by the UE. UE 115-a can receive the refined transmit beam 405 within a refined TTI 410 corresponding to the transmit beam. For example, base station 405-a can transmit DL data on a third refined transmit beam 405-c, and UE 115-a can receive DL data during the third refined TTI 410-c. UE 115-a can then interpret the command information and DL data synchronously with the initiated DRX activation cycle duration.

[0142] Figure 5 Examples of a process flow 500 supporting beam management according to various aspects of this disclosure are explained. In some cases, process flow 500 may represent aspects of techniques performed by one or more base stations 105 for DL ​​transmission, receive beam training and UL reception, and by one or more UEs 115 for DL ​​reception, transmit beam selection and beam recovery signal transmission. Process flow 500 explains techniques for coarse beam management for beam-sweep wake-up signals and refined beam management for PDCCH transmission.

[0143] In 505, base station 105-b can provide beam-sweep transmission of one or more reference signals to UE 115-b. Base station 105-b can transmit these reference signals via one or more beam-sweep transmission BRS. Beam-sweep transmission can serve at least as a reference point for downlink power on channel resources and as a preemption indication for subsequent wake-up signal transmission.

[0144] In 510, UE 115-b can sequentially evaluate reference signals on one or more pre-configured transmit beams in a hierarchical manner. In some cases, UE 115-b can evaluate the initial pre-configured transmit beam (e.g., the main transmit beam) and determine that the beam's signal quality is sufficient. Based at least in part on the transmit beam sufficiency, UE 115-b may choose to abandon additional transmit beam evaluations and suspend beam recovery signal transmission to the base station. In other cases, UE 115-b can evaluate the initial pre-configured transmit beam (e.g., the main transmit beam) and determine that the main beam's link quality degrades below a pre-configured threshold. UE 115-b can then evaluate subsequent pre-configured transmit beams (e.g., secondary transmit beams) and determine the secondary beam's signal quality. If the secondary transmit beam is sufficient, UE 115-b may choose to abandon additional transmit beam evaluations and suspend beam recovery signal transmission. In cases where each pre-configured beam is degraded, UE 115-b can evaluate alternative beams for reference signal transmission 505.

[0145] At 515, base station 105-b can train one or more receive beams for UL beam recovery signal reception. The receive beams can be transmitted in a beam-sweeping manner, and each receive beam can be associated with a TTI period. In the absence of beam recovery signal reception, base station 105-b can maintain the pre-configured transmit beams of UE 115-b for wake-up signal transmission. Alternatively, base station 105-b can receive UL beam recovery signal transmission via one or more transmit beams 520. At 525, base station 105-b can decode and interpret the UL transmission during the corresponding TTI of the associated receive beam. Based at least in part on the implemented receive beams, base station 105-b can identify the transmit beams selected by UE 115-b for wake-up signal transmission.

[0146] At 530, base station 105-b can transmit a wake-up signal to UE 115-b via a coarse transmit beam selected by the UE. The transmit beam can directly correspond to the receive beam implemented by base station 105-b. UE 115-b can receive the selected coarse beam and decode and interpret the wake-up signal transmission within the corresponding TTI associated with UE 115-b's preferred transmit beam. UE 115-b can then interpret this reception as a wake-up signal indication and initiate DRX enable configuration for subsequent PDCCH and DL data transmission.

[0147] In 535, base station 105-b can transmit refined reference signal transmission to UE 115-b for refined beam management procedures. Base station 105-b can transmit the reference signal via a refined BRS, which has higher granularity and a larger number of beams compared to the coarse transmit beams of wake-up signal transmission. Beam-sweeping transmission can at least serve as a reference point for downlink power on channel resources and a preemption indication for subsequent PDCCH and DL data transmission.

[0148] At 540, UE 115-b can evaluate the refined reference signal transmission and determine the preferred transmit beam for transmission. At 545, base station 105-b can train one or more refined receive beams for UL beam recovery signal reception. The receive beams can be transmitted in a beam-sweeping manner, and each receive beam can be associated with a TTI period.

[0149] UE 115-b can transmit a refined beam recovery signal 550 to base station 105-b to indicate the transmit beam selected from the refined transmit beam set used for PDCCH reception. Base station 105-b can evaluate this indication and identify the transmit beam selected by UE 115-b. Base station 105-b can then transmit data 555, including the complete PDCCH and DL traffic payload, to UE 115-b on the transmit beam selected by UE.

[0150] Figure 6 A block diagram 600 of a beam-management-supporting wireless device 605 according to various aspects of this disclosure is shown. Wireless device 605 may be an example of various aspects of base station 105 as described herein. Wireless device 605 may include a receiver 610, a base station communication manager 615, and a transmitter 620. Wireless device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0151] Receiver 610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to beam management for beam-sweep wake-up signals). The information can be transmitted to other components of the device. Receiver 610 can be a reference... Figure 9 Examples of various aspects of the transceiver 935 are described. The receiver 610 may utilize a single antenna or an array of antennas.

[0152] Base station communication manager 615 can be used as a reference Figure 9 Examples of various aspects of the described base station communication manager 915. At least some of the base station communication manager 615 and / or its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the base station communication manager 615 and / or its various sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0153] At least some of the sub-components of the base station communication manager 615 and / or its various sub-components may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of this disclosure, at least some of the sub-components of the base station communication manager 615 and / or its various sub-components may be separate and distinct components. In other examples, according to various aspects of this disclosure, at least some of the sub-components of the base station communication manager 615 and / or its various sub-components may be combined with one or more other hardware components (including, but not limited to, I / O components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof).

[0154] The base station communication manager 615 can identify data available for transmission to the UE 115 operating in DRX mode, and transmit a wake-up signal to the UE 115 to wake it from the sleep state of DRX mode. The wake-up signal is transmitted using a first transmit beam and a second transmit beam from the first transmit beam set according to the beam sweep configuration.

[0155] In some examples, the base station communication manager 615 may also transmit a wake-up signal to a UE operating in DRX mode to wake the UE 115 from its sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. In some cases, the base station communication manager 615 may use the second transmit beam set to transmit a set of signals, including a reference signal, a synchronization signal, or a combination thereof; and receive indications for transmit beams from the second transmit beam set, selected by the UE.

[0156] Transmitter 620 can transmit signals generated by other components of the device. In some examples, transmitter 620 may coexist with receiver 610 in a transceiver module. For example, transmitter 620 may be a reference... Figure 9 Examples of various aspects of the transceiver 935 are described. The transmitter 620 may utilize a single antenna or an array of antennas.

[0157] Figure 7 A block diagram 700 of a wireless device 705 supporting beam management according to various aspects of this disclosure is shown. The wireless device 705 may be a reference... Figure 6 Examples of various aspects of the described wireless device 605 or base station 105. Wireless device 705 may include a receiver 710, a base station communication manager 715, and a transmitter 720. Wireless device 705 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0158] Receiver 710 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to beam management for beam-sweep wake-up signals). The information can be transmitted to other components of the device. Receiver 710 can be a reference. Figure 9 Examples of various aspects of the transceiver 935 are described. The receiver 710 may utilize a single antenna or an array of antennas.

[0159] Base station communication manager 715 can be used as a reference Figure 9 Examples of aspects of the described base station communication manager 915. The base station communication manager 915 may also include an available data manager 725, a base station wake-up signal component 730, a signaling component 735, and a transmit beam manager 740.

[0160] The available data manager 725 can identify data available for transmission to a UE operating in DRX mode. The base station wake-up signal component 730 can transmit a wake-up signal to the UE 115 to wake it from its sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set, according to a beam sweep configuration. In some cases, the first transmit beam, or the second transmit beam, or both, are pseudo-omnidirectional beams. In some cases, the wake-up signal includes narrowband frequency modulation, or a UE-specific reference signal, or a PDCCH including multiple Cyclic Redundancy Check (CRC) bits scrambled by the UE's C-RNTI, or a combination thereof. In some cases, the DRX mode includes a connected C-DRX mode.

[0161] Signaling component 735 may use a second transmit beamset to transmit a set of signals, including a reference signal, a synchronization signal, or a combination thereof; and uses the second transmit beamset to transmit the signal set based on received instructions for the second transmit beamset. In some cases, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or a combination thereof. In some cases, the synchronization signal includes PSS, SSS, DMRS, PBCH signals, or a combination thereof.

[0162] Transmit beam manager 740 can configure UE 115 to periodically transmit indications to a second transmit beam set, use a first transmit beam set to transmit signal sets according to a beam sweep configuration, and identify at least a first and a second transmit beam in the first transmit beam set based on an identified transmit beam set used for transmitting a synchronization signal set. In some cases, transmit beam manager 740 can receive indications for transmit beams from the second transmit beam set, which are selected by UE 115. In some examples, transmit beam manager 740 can receive indications from UE 115 for the second transmit beam set, use the indicated transmit beams to transmit PDCCH, or resource grants, or downlink data, or combinations thereof, and identify the transmit beam set used for transmitting a synchronization signal set.

[0163] In some cases, receiving an indication from UE 115 for a second transmit beam set, the second transmit beam set including transmit beam sets selected by UE 115 based on a signal set, wherein transmitting a wake-up signal includes: using transmit beam sets in the second transmit beam set to transmit the wake-up signal based on the received indication. In some cases, the number of second transmit beams is greater than the number of first transmit beam sets. In some cases, receiving an indication for a second transmit beam set includes: receiving a beam recovery signal identifying the second transmit beam set. In some cases, each beam in the second transmit beam set is different from each beam in the first transmit beam set.

[0164] Transmitter 720 can transmit signals generated by other components of the device. In some examples, transmitter 720 may coexist with receiver 710 in a transceiver module. For example, transmitter 720 may be a reference... Figure 9 Examples of various aspects of the transceiver 935 are described. The transmitter 720 may utilize a single antenna or an array of antennas.

[0165] Figure 8 A block diagram 800 of a base station communication manager 815 supporting beam management according to various aspects of this disclosure is shown. The base station communication manager 815 may be a reference... Figure 6 , 7 Examples of aspects of base station communication managers 615, 715, or 915 described in Figure 9 are provided. Base station communication manager 815 may include available data manager 820, base station wake-up signal component 825, signaling component 830, transmit beam manager 835, beam monitoring configuration component 840, beam management component 845, and encoder 850. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0166] The available data manager 820 can identify data that can be transmitted to a UE operating in DRX mode.

[0167] The base station wake-up signal component 825 can transmit a wake-up signal to the UE 115 to wake the UE 115 from a sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set, according to a beam sweep configuration. In some cases, the first transmit beam, or the second transmit beam, or both, are pseudo-omnidirectional beams. In some cases, the wake-up signal includes narrowband frequency modulation, or a UE-specific reference signal, or a PDCCH including multiple Cyclic Redundancy Check (CRC) bits scrambled by the UE's C-RNTI, or a combination thereof. In some cases, the DRX mode includes a connected C-DRX mode.

[0168] Signaling component 830 may use a second transmit beamset to transmit a signal set, which includes a reference signal, a synchronization signal, or a combination thereof; and uses the second transmit beamset to transmit the signal set based on received instructions for the second transmit beamset. In some cases, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or a combination thereof. In some cases, the synchronization signal includes PSS, SSS, DMRS, PBCH signals, or a combination thereof.

[0169] Transmit beam manager 835 can configure UE 115 to periodically transmit indications to a second transmit beam set, use a first transmit beam set to transmit signal sets according to a beam sweep configuration, and identify at least a first and a second transmit beam in the first transmit beam set based on an identified transmit beam set used for transmitting a synchronization signal set. In some cases, transmit beam manager 740 can receive indications for transmit beams from the second transmit beam set, which are selected by UE 115. In some examples, transmit beam manager 740 can receive indications from UE 115 for the second transmit beam set, use the indicated transmit beams to transmit PDCCH, or resource grants, or downlink data, or combinations thereof, and identify the transmit beam set used for transmitting a synchronization signal set.

[0170] In some cases, receiving an indication from UE 115 for a second transmit beam set, the second transmit beam set including transmit beam sets selected by UE 115 based on a signal set, wherein transmitting a wake-up signal includes: using transmit beam sets in the second transmit beam set to transmit the wake-up signal based on the received indication. In some cases, the number of second transmit beams is greater than the number of first transmit beam sets. In some cases, receiving an indication for a second transmit beam set includes: receiving a beam recovery signal identifying the second transmit beam set. In some cases, each beam in the second transmit beam set is different from each beam in the first transmit beam set.

[0171] The beam monitoring configuration component 840 can configure the UE to monitor a first transmit beam set while operating in DRX mode to receive a set of signals from a base station, including a reference signal, a synchronization signal, or a combination thereof. In some cases, the beam monitoring configuration component 840 can determine a link quality threshold for decoding a wake-up signal and configure the UE 115 to transmit an indication to a second transmit beam set when the link quality of the first or second transmit beam in the first transmit beam set fails to meet the determined link quality threshold.

[0172] Beam management component 845 can determine a beam management configuration for the UE to receive a second transmit beam set, and transmit at least a portion of the beam management configuration using a wake-up signal. Encoder 850 can encode the signal set using a higher code rate than that used to encode the wake-up signal.

[0173] Figure 9 A diagram is shown illustrating a system 900 including a device 905 supporting beam management according to various aspects of this disclosure. Device 905 may be, for example, as described above, referred to... Figure 6 and 7 Examples of components of the described wireless device 605, wireless device 705, or base station 105, or including such components, are described. Device 905 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a base station communication manager 915, a processor 920, a memory 925, software 930, a transceiver 935, an antenna 940, a network communication manager 945, and an inter-station communication manager 950. These components may be in electronic communication via one or more buses (e.g., bus 910). Device 905 may wirelessly communicate with one or more UEs 115.

[0174] Processor 920 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, central processing units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 920 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 920. Processor 920 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting beam management for beam-sweep wake-up signals).

[0175] Memory 925 may include random access memory (RAM) and read-only memory (ROM). Memory 925 may store computer-readable, computer-executable software 930, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 925 may particularly include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0176] Software 930 may include code for implementing various aspects of this disclosure, including code for supporting beam management for beam-sweep wake-up signals. Software 930 may be stored in a non-transient computer-readable medium, such as system memory or other memory. In some cases, software 930 may not be executed directly by a processor, but may instead cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0177] Transceiver 935 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 935 may represent a wireless transceiver and be able to communicate bidirectionally with another wireless transceiver. Transceiver 935 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna. In some cases, the wireless device may include a single antenna 940. However, in some cases, the device may have more than one antenna 940, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0178] The network communication manager 945 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 945 can manage the delivery of data communication by client devices (such as one or more UEs 115).

[0179] Inter-site communication manager 950 manages communication with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 950 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, inter-site communication manager 950 may provide an X2 interface within Long Term Evolution (LTE) / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0180] Figure 10A block diagram 1000 of a beam-management-supporting wireless device 1005 according to various aspects of this disclosure is shown. Wireless device 1005 may be an example of aspects of a UE 115 as described herein. Wireless device 1005 may include a receiver 1010, a UE communication manager 1015, and a transmitter 1020. Wireless device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0181] Receiver 1010 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to beam management for beam-sweep wake-up signals). The information can be transmitted to other components of the device. Receiver 1010 can be a reference. Figure 13 Examples of various aspects of the transceiver 1335 are described. The receiver 1010 may utilize a single antenna or an array of antennas.

[0182] UE Communication Manager 1015 can be used as a reference Figure 13 Examples of various aspects of the described UE communication manager 1315. At least some of the UE communication manager 1015 and / or its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the UE communication manager 1015 and / or its various sub-components may be performed by a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0183] At least some of the UE communication manager 1015 and / or its various sub-components may be physically located in various locations, including being distributed such that portions of the functionality are implemented by one or more physical devices in different physical locations. In some examples, according to various aspects of this disclosure, at least some of the UE communication manager 1015 and / or its various sub-components may be separate and distinct components. In other examples, according to various aspects of this disclosure, at least some of the UE communication manager 1015 and / or its various sub-components may be combined with one or more other hardware components (including, but not limited to, I / O components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof).

[0184] The UE communication manager 1015 can operate in DRX mode while simultaneously receiving a first signal from a signal set using a first transmit beam from a first transmit beam set and receiving a second signal from the same signal set using a second transmit beam from the same first transmit beam set. This signal set includes a reference signal, a synchronization signal, or a combination thereof, and is transmitted by the base station using a beam-sweeping configuration. In some examples, the UE communication manager 1015 can select a second transmit beam set based on the received signal set. This second transmit beam set includes two or more transmit beams, and these two or more transmit beams are different from the first transmit beam set. The UE communication manager 1015 can transmit an indication of the selected second transmit beam set to the base station.

[0185] In some examples, the UE communication manager 1015 may also receive a wake-up signal while operating in DRX mode to wake the UE from its sleep state in DRX mode. This wake-up signal is transmitted by the base station using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. In some cases, the UE communication manager 1015 may, based on receiving the wake-up signal, receive a set of signals transmitted by the base station using a second transmit beam set, including a reference signal, a synchronization signal, or a combination thereof; select a transmit beam from the second transmit beam set for the UE to use to receive downlink transmissions from the base station; and transmit an indication of the selected transmit beam to the base station.

[0186] In some examples, the UE communication manager 1015 may also receive from the base station a first signal set from a first transmit beam set and a second signal set from a second transmit beam set, wherein the first signal set includes a reference signal, or a synchronization signal, or a combination thereof. The UE communication manager 1015 may also select a transmit beam from the second transmit beam set based at least in part on the received first signal set. In other examples, the UE communication manager 1015 may also transmit to the base station an indication of the transmit beam selected from the second transmit beam set.

[0187] Transmitter 1020 can transmit signals generated by other components of the device. In some examples, transmitter 1020 may coexist with receiver 1010 in a transceiver module. For example, transmitter 1020 may be a reference... Figure 13 Examples of various aspects of the transceiver 1335 are described. The transmitter 1020 may utilize a single antenna or an array of antennas.

[0188] Figure 11 A block diagram 1100 of a wireless device 1105 supporting beam management according to various aspects of this disclosure is shown. The wireless device 1105 may be as described with reference to... Figure 10Examples of aspects of the described wireless device 1005 or UE 115. Wireless device 1105 may include a receiver 1110, a UE communication manager 1115, and a transmitter 1120. Wireless device 1105 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0189] Receiver 1110 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to beam management for beam-sweep wake-up signals). The information can be transmitted to other components of the device. Receiver 1110 can be a reference... Figure 13 Examples of various aspects of the transceiver 1335 are described. The receiver 1110 may utilize a single antenna or an array of antennas.

[0190] UE Communication Manager 1115 can be used as a reference Figure 13 Examples of various aspects of the described UE communication manager 1315. The UE communication manager 1115 may also include a DRX manager 1125, a beam selection component 1130, an indication manager 1135, and a signal receiving component 1140.

[0191] The DRX manager 1125 can operate in DRX mode while simultaneously receiving a first signal from a signal set using a first transmit beam from a first transmit beam set and a second signal from the same signal set using a second transmit beam from the same first transmit beam set. This signal set includes a reference signal, a synchronization signal, or a combination thereof, and is transmitted by the base station using a beam-sweeping configuration. The DRX manager 1125 can wake up from a sleep state in DRX mode to receive data based on a received wake-up signal. In some examples, the DRX manager 1125 can receive a wake-up signal while operating in DRX mode to wake the UE from a sleep state in DRX mode. This wake-up signal is transmitted by the base station using a first transmit beam and a second transmit beam from the first transmit beam set according to a beam-sweeping configuration; and receives at least a portion of a beam management configuration for selecting a transmit beam from the second transmit beam set as part of the wake-up signal. In some cases, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or a combination thereof. In some cases, the synchronization signal includes PSS, SSS, DMRS, PBCH signals, or a combination thereof. In some cases, DRX mode includes C-DRX mode.

[0192] Beam selection component 1130 can select a second transmit beam set based on a received signal set, the second transmit beam set comprising two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set; and select from the second transmit beam set a transmit beam for UE 115 to receive downlink transmissions from the base station. Beam selection component 1130 can also select a transmit beam from the second transmit beam set at least in part based on a received first signal set.

[0193] The instruction manager 1135 can transmit an instruction to the base station 105 for a selected second transmit beam set, and also transmit an instruction to the base station for a selected transmit beam. In some cases, transmitting the instruction for the selected second transmit beam set includes transmitting a beam recovery signal identifying the selected second transmit beam set. The instruction manager 1135 can also transmit an instruction to the base station for a transmit beam selected from the second transmit beam set.

[0194] The signal receiving component 1140 can receive a set of signals transmitted by the base station using a second transmit beam set, which includes a reference signal, a synchronization signal, or a combination thereof, based on the receipt of a wake-up signal; and can receive downlink transmissions transmitted by the base station using a selected transmit beam, wherein the downlink transmissions include PDCCH, resource grants, downlink data, or a combination thereof. In some cases, the number of second transmit beams is greater than the number of first transmit beam sets. The signal receiving component 1140 can also receive from the base station a first signal set in the first transmit beam set and a second signal set in the second transmit beam set, wherein the first signal set includes a reference signal, a synchronization signal, or a combination thereof.

[0195] Transmitter 1120 can transmit signals generated by other components of the device. In some examples, transmitter 1120 may coexist with receiver 1110 in a transceiver module. For example, transmitter 1120 may be a reference... Figure 13 Examples of various aspects of the transceiver 1335 are described. The transmitter 1120 may utilize a single antenna or an array of antennas.

[0196] Figure 12 A block diagram 1200 of a UE communication manager 1215 supporting beam management according to various aspects of this disclosure is shown. The UE communication manager 1215 may be a reference... Figure 10 , 11Examples of various aspects of the UE communication manager 1315 described in section 13 are provided. The UE communication manager 1215 may include a DRX manager 1220, a beam selection component 1225, an indication manager 1230, a signal receiving component 1235, a UE wake-up signal component 1240, a signal quality component 1245, and a decoder 1250. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0197] The DRX manager 1220 can operate in DRX mode while simultaneously receiving a first signal from a signal set using a first transmit beam from a first transmit beam set and a second signal from the same signal set using a second transmit beam from the same first transmit beam set. This signal set includes a reference signal, a synchronization signal, or a combination thereof, and is transmitted by the base station using a beam-sweeping configuration. The DRX manager 1220 can wake up from a sleep state in DRX mode to receive data based on a received wake-up signal. In some examples, the DRX manager 1220 can receive a wake-up signal while operating in DRX mode to wake the UE from a sleep state in DRX mode. This wake-up signal is transmitted by the base station using a first transmit beam and a second transmit beam from the first transmit beam set according to a beam-sweeping configuration; and receives at least a portion of a beam management configuration for selecting a transmit beam from the second transmit beam set as part of the wake-up signal. In some cases, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or a combination thereof. In some cases, the synchronization signal includes PSS, SSS, DMRS, PBCH signals, or a combination thereof. In some cases, DRX mode includes C-DRX mode.

[0198] The beam selection component 1225 can select a second transmit beam set based on the received signal set, the second transmit beam set including two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set; and select transmit beams from the second transmit beam set for the UE to use to receive downlink transmissions from the base station.

[0199] The instruction manager 1230 can transmit an instruction to the base station for a selected second transmit beam set, and also transmit an instruction for the selected transmit beam. In some cases, transmitting the instruction for the selected second transmit beam set includes transmitting a beam recovery signal identifying the selected second transmit beam set. The instruction manager 1230 can also transmit a beam recovery signal identifying the selected transmit beam.

[0200] The signal receiving component 1235 can receive a set of signals transmitted by the base station using a second transmit beam set, including a reference signal, a synchronization signal, or a combination thereof, based on the receipt of a wake-up signal; and can receive downlink transmissions transmitted by the base station using a selected transmit beam set, wherein the downlink transmissions include PDCCH, resource grants, downlink data, or a combination thereof. In some cases, the number of second transmit beams is greater than the number of first transmit beam sets. The signal receiving component 1235 can also receive the configuration of periodic CSI-RS resources and receive at least one CSI-RS during the CSI-RS resource period.

[0201] The UE wake-up signal component 1240 receives a wake-up signal from the base station, which is received using at least one transmit beam from the second transmit beam set. In some cases, the wake-up signal includes a narrowband frequency modulation, or a reference signal that varies depending on the UE, or a PDCCH that includes multiple cyclic redundancy check (CRC) bits scrambled by the UE's C-RNTI, or a combination thereof.

[0202] Signal quality component 1245 can determine the signal quality associated with a received first signal set, wherein identifying the second transmit beam set is based on a signal quality threshold. Signal quality component 1245 can determine the signal quality associated with a decoded reference signal set, wherein selecting transmit beams is based on a signal quality threshold. Decoder 1250 can decode the signal set, wherein the signal set is encoded using a code rate higher than the code rate used to encode the wake-up signal. Signal quality component 1245 can also determine the signal quality associated with the received first signal set for each transmit beam in the first transmit beam set, wherein beam selection component 1225 can select transmit beams based on a signal quality threshold. Signal quality component 1245 can determine that the signal quality of each transmit beam in the first transmit beam set is below a signal quality threshold, wherein beam selection component 1245 can select transmit beams at least in part based on this determination. In some cases, the reference signal includes DMRS, TRS, PC-RS, or CSI-RS, or combinations thereof. In some cases, the synchronization signal includes PSS, SSS, DMRS, PBCH signals, or combinations thereof. In some cases, the DRX mode includes the C-DRX mode. The signal quality component 1245 may also determine that the signal quality associated with at least one received CSI-RS is below a signal quality threshold, wherein the selection of the second transmit beam set is at least partially based on this determination, and the signal receiving component 1235 may receive signals from the base station using at least one transmit beam from the second transmit beam set, at least partially based on this determination.

[0203] Figure 13A diagram is shown of a system 1300 including a device 1305 supporting beam management according to various aspects of this disclosure. Device 1305 may be the above (e.g., refer to...). Figure 1 The device 1305 may include examples of the UE 115 described herein or its components. The device 1305 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a UE communication manager 1315, a processor 1320, a memory 1325, software 1330, a transceiver 1335, an antenna 1340, and an I / O controller 1345. These components may be in electronic communication via one or more buses (e.g., bus 1310). The device 1305 may wirelessly communicate with one or more base stations 105.

[0204] Processor 1320 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1320 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 1320. Processor 1320 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting beam management for beam-sweep wake-up signals).

[0205] Memory 1325 may include RAM and ROM. Memory 1325 may store computer-readable, computer-executable software 1330, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1325 may, in particular, contain a BIOS that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0206] Software 1330 may include code for implementing various aspects of this disclosure, including code for supporting beam management for beam-sweep wake-up signals. Software 1330 may be stored in a non-transient computer-readable medium, such as system memory or other memory. In some cases, software 1330 may not be executed directly by a processor, but may instead cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0207] Transceiver 1335 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 1335 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1335 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna. In some cases, the wireless device may include a single antenna 1340. However, in some cases, the device may have more than one antenna 1340, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0208] I / O controller 1345 manages the input and output signals of device 1305. I / O controller 1345 can also manage peripheral devices not integrated into device 1305. In some cases, I / O controller 1345 may represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1345 may utilize an operating system, such as... MS- MS- Or another known operating system. In other cases, I / O controller 1345 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, I / O controller 1345 may be implemented as part of a processor. In some cases, a user may interact with device 1305 via I / O controller 1345 or via hardware components controlled by I / O controller 1345.

[0209] Figure 14 A flowchart illustrating a method 1400 for beam management according to various aspects of this disclosure is shown. Operation of method 1400 can be implemented by a base station 105 or its components as described herein. For example, operation of method 1400 can be implemented by, as referred to... Figures 6 to 9 The described base station communication manager is used to perform these functions. In some examples, base station 105 can execute a set of code to control the functional elements of the device to perform the following functions. Additionally or alternatively, base station 105 may use dedicated hardware to perform aspects of the following functions.

[0210] In block 1405, base station 105 may identify data available for transmission to UE 115 operating in DRX mode (e.g., C-DRX mode). Operation of block 1405 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1405 may be determined by reference to [reference needed]. Figures 6 to 9 The described data manager can be used to execute this.

[0211] In block 1410, base station 105 may transmit a wake-up signal to UE 115 to wake the UE from a sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. Operation of block 1410 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1410 may be determined by reference to [reference needed]. Figures 6 to 9 The described base station wake-up signal component is used to perform this.

[0212] Figure 15 A flowchart illustrating a method 1500 for beam management according to various aspects of this disclosure is shown. Operation of method 1500 can be implemented by a base station 105 or its components as described herein. For example, operation of method 1500 can be implemented by, as referred to... Figures 6 to 9 The described base station communication manager is used to perform these functions. In some examples, base station 105 can execute a set of code to control the functional elements of the device to perform the following functions. Additionally or alternatively, base station 105 may use dedicated hardware to perform aspects of the following functions.

[0213] In block 1505, base station 105 can configure UE 115 to operate in DRX mode while monitoring a first transmit beam set to receive a set of signals from the base station, including a reference signal, or a synchronization signal, or a combination thereof. Operation of block 1505 can be performed according to the methods described herein. In some examples, aspects of operation of block 1505 can be determined by reference to... Figures 6 to 9 The described beam monitoring configuration component is used to perform this.

[0214] In block 1510, base station 105 may identify data available for transmission to UE 115 operating in DRX mode. Operation of block 1510 may be performed according to the methods described herein. In some examples, aspects of operation of block 1510 may be determined by reference to... Figures 6 to 9 The described data manager can be used to execute this.

[0215] In block 1515, base station 105 may transmit a wake-up signal to UE 115 to wake UE 115 from a sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. Operation of block 1515 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1515 may be determined by reference to [reference needed]. Figures 6 to 9 The described base station wake-up signal component is used to perform this.

[0216] Figure 16A flowchart illustrating a method 1600 for beam management according to various aspects of this disclosure is shown. Operation of method 1600 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1600 may be implemented by, as referred to... Figures 10 to 13 The UE communication manager described herein performs the following functions. In some examples, the UE 115 can execute a set of code to control the functional elements of the device to perform the following functions. Alternatively or alternatively, the UE 115 may use dedicated hardware to perform aspects of the following functions.

[0217] In block 1605, UE 115, while operating in discontinuous reception (DRX) mode, receives from the base station a first set of signals from a first transmit beamset and a second set of signals from a second transmit beamset, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof. Operation of block 1605 may be performed according to the methods described herein. In some examples, aspects of operation of block 1605 may be determined by reference to... Figures 10 to 13 The described DRX manager is used to execute this.

[0218] In block 1610, UE 115 may select a second transmit beam set based at least in part on a first received signal set, the second transmit beam set comprising two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set. Operation of block 1610 may be performed according to the methods described herein. In some examples, aspects of operation of block 1610 may be derived from, as referenced... Figures 10 to 13 The described beam selection component is used to perform this.

[0219] In block 1615, UE 115 may transmit an indication to the base station of the selected second transmit beam set. Operation of block 1615 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1615 may be determined by reference to... Figures 10 to 13 The described instruction manager is used to execute it.

[0220] Figure 17 A flowchart illustrating a method 1700 for beam management according to various aspects of this disclosure is shown. Operation of method 1700 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1700 may be implemented by, as referred to... Figures 10 to 13 The UE communication manager described herein performs the following functions. In some examples, the UE 115 can execute a set of code to control the functional elements of the device to perform the following functions. Alternatively or alternatively, the UE 115 may use dedicated hardware to perform aspects of the following functions.

[0221] In block 1705, UE 115 can simultaneously operate in discontinuous reception (DRX) mode and receive from a base station a first set of signals from a first transmit beamset and a second set of signals from a second transmit beamset, wherein the first set of signals includes a reference signal, or a synchronization signal, or a combination thereof. Operation of block 1705 can be performed according to the methods described herein. In some examples, aspects of operation of block 1705 can be determined by reference to... Figures 10 to 13 The described DRX manager is used to execute this.

[0222] In block 1710, UE 115 may select a second transmit beam set based at least in part on a first set of received signals, the second transmit beam set comprising two or more transmit beams, and the two or more transmit beams being different from the first transmit beam set. Operation of block 1710 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1710 may be derived from, as referenced... Figures 10 to 13 The described beam selection component is used to perform this.

[0223] In block 1715, UE 115 may transmit an indication to the base station of the selected second transmit beam set. Operation of block 1715 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1715 may be determined by reference to... Figures 10 to 13 The described instruction manager is used to execute it.

[0224] In block 1720, UE 115 may receive a wake-up signal from the base station, which is received using at least one transmit beam from the second transmit beam set. Operation of block 1720 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1720 may be determined by reference to... Figures 10 to 13 The UE wake-up signal component is described and executed.

[0225] In block 1725, UE 115 may wake from a sleep state in DRX mode, at least in part, based on a received wake-up signal, to receive data. Operation of block 1725 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1725 may be determined by reference to... Figures 10 to 13 The described DRX manager is used to execute this.

[0226] Figure 18 A flowchart illustrating a method 1800 for beam management according to various aspects of this disclosure is shown. Operation of method 1800 can be implemented by a base station 105 or its components as described herein. For example, operation of method 1800 can be implemented by referring to... Figures 6 to 9The described base station communication manager is used to perform these functions. In some examples, base station 105 can execute a set of code to control the functional elements of the device to perform the following functions. Additionally or alternatively, base station 105 may use dedicated hardware to perform aspects of the following functions.

[0227] In block 1805, base station 105 can transmit a wake-up signal to a user equipment (UE) operating in discontinuous reception (DRX) mode to wake the UE from its sleep state in DRX mode. This wake-up signal is transmitted using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. Operation of block 1805 can be performed according to the methods described herein. In some examples, aspects of the operation of block 1805 can be determined by referring to... Figures 6 to 9 The described base station wake-up signal component is used to perform this.

[0228] In block 1810, base station 105 may use a second transmit beamset to transmit a signal set, which includes a reference signal, or a synchronization signal, or a combination thereof. Operation of block 1810 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1810 may be determined by reference to... Figures 6 to 9 The signaling component described is used to execute this.

[0229] In block 1815, base station 105 may receive an indication of a transmit beam from a second transmit beam set, which is selected by the UE. Operation of block 1815 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1815 may be as described in reference... Figures 6 to 9 The described transmit beam manager is used to perform this.

[0230] Figure 19 A flowchart illustrating a method 1900 for beam management according to various aspects of this disclosure is shown. Operation of method 1900 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1900 may be implemented by, as referred to... Figures 10 to 13 The UE communication manager described herein performs the following functions. In some examples, the UE 115 can execute a set of code to control the functional elements of the device to perform the following functions. Alternatively or alternatively, the UE 115 may use dedicated hardware to perform aspects of the following functions.

[0231] In block 1905, UE 115 can receive a wake-up signal while operating in DRX mode to wake the UE from its sleep state in DRX mode. This wake-up signal is transmitted by the base station using a first transmit beam and a second transmit beam from a first transmit beam set according to a beam sweep configuration. Operation of block 1905 can be performed according to the methods described herein. In some examples, aspects of operation of block 1905 can be determined by referring to... Figures 10 to 13The described DRX manager is used to execute this.

[0232] In block 1910, UE 115 may receive, at least in part, a set of signals transmitted by the base station using a second transmit beamset, including a reference signal, or a synchronization signal, or a combination thereof, based on the receipt of the wake-up signal. Operation of block 1910 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1910 may be determined by reference to... Figures 10 to 13 The described signal receiving component is used to perform this.

[0233] In block 1915, UE 115 can select from the second transmit beam set a transmit beam for the UE to use for receiving downlink transmissions from the base station. Operation of block 1915 can be performed according to the method described herein. In some examples, aspects of the operation of block 1915 can be determined by referring to... Figures 10 to 13 The described beam selection component is used to perform this.

[0234] In block 1920, UE 115 may transmit an indication of the selected transmit beam to the base station. Operation of block 1920 may be performed according to the methods described herein. In some examples, aspects of the operation of block 1920 may be determined by reference to... Figures 10 to 13 The described instruction manager is used to execute it.

[0235] Figure 20 A flowchart illustrating a method 2000 for beam management according to various aspects of this disclosure is shown. Operation of method 2000 may be implemented by a UE 115 or its components as described herein. For example, operation of method 2000 may be implemented by, as referred to... Figures 10 to 13 The UE communication manager described herein performs the following functions. In some examples, the UE 115 can execute a set of code to control the functional elements of the device to perform the following functions. Alternatively or alternatively, the UE 115 may use dedicated hardware to perform aspects of the following functions.

[0236] In block 2005, UE 115 can receive from the base station a first signal set from a first transmit beamset and a second signal set from a second transmit beamset, wherein the first signal set includes a reference signal, or a synchronization signal, or a combination thereof. Operation of block 2005 can be performed according to the methods described herein. In some examples, aspects of the operation of block 2005 can be determined by reference to... Figures 10 to 13 The described DRX manager is used to execute this.

[0237] In block 2010, UE 115 may select a transmit beam from a second transmit beam set based at least in part on a first set of received signals. The operation of block 2010 may be performed according to the methods described herein. In some examples, aspects of the operation of block 2010 may be provided by reference to... Figures 10 to 13The described signal receiving component is used to perform this.

[0238] In block 2015, UE 115 may transmit to the base station an indication of the transmit beam selected from the second transmit beam set. Operation of block 2015 may be performed according to the methods described herein. In some examples, aspects of the operation of block 2015 may be determined by reference to... Figures 10 to 13 The described beam selection component is used to perform this.

[0239] It should be noted that the above methods describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0240] The techniques described in this article can be used in various wireless communication systems, such as 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), and others. CDMA systems can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. Versions of IS-2000 are often referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0241] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, 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 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. Although aspects of LTE or NR systems are described for illustrative purposes, and the terminology of LTE or NR is used in most of the above descriptions, the technologies described herein can also be applied to applications beyond LTE or NR.

[0242] Macrocells typically cover a relatively large geographic area (e.g., an area with a radius of several kilometers) and allow unrestricted access by UE 115 with a service subscription to a network provider. Small cells may be associated with a lower-power base station 105 (compared to macrocells) and may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as macrocells. Depending on the examples, small cells may include picocells, femtocells, and microcells. Picocells may, for example, cover a smaller geographic area and allow unrestricted access by UE 115 with a service subscription to a network provider. Femtocells may also cover a smaller geographic area (e.g., a residential area) and provide restricted access by UE 115 associated with that femtocell (e.g., UE 115 in a closed subscriber group (CSG), UE 115 of a user in a residence, etc.). The eNB used for a macrocell may be referred to as a macro eNB. An eNB used for small cells may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0243] One or more wireless communication systems 100 described herein can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and transmissions from different base stations 105 may not be time-aligned. The techniques described herein can be used for both synchronous and asynchronous operation.

[0244] The information and signals described herein can be represented using any of a wide variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0245] The various illustrative blocks and modules described herein can be implemented or executed using a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), 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. The general-purpose processor may be a microprocessor, but in alternative embodiments, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration).

[0246] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the above functions can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions can also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations.

[0247] Computer-readable media includes both non-transient computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transient storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example, and not limitation, non-transient computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then that coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. As used in this article, disk and disc include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks often magnetically reproduce data while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0248] As used herein (including in the claims), the word "or" in an enumeration of items (e.g., an enumeration of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive enumeration, such that an enumeration of at least one of, for example, A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be construed as referencing a closed set of conditions. For example, an exemplary step described as based on condition "A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0249] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, components of the same type may be distinguished by a dash following the reference numeral and a second reference numeral used to differentiate between similar components. If only the first reference numeral is used in the description, the description may apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0250] This document, illustrated with reference to the accompanying drawings, describes exemplary configurations but does not represent all examples that can be implemented or fall within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to" or "outperforms" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0251] The description provided herein is intended to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the universal principles defined herein can be applied to other variations without departing from the scope of this disclosure. Thus, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for conducting wireless communication at a user equipment (UE), comprising: A Discontinuous Reception (DRX) mode configuration is provided, wherein a first transmit beam and a second transmit beam in a first transmit beam set are configured to receive a wake-up signal to wake the UE from a sleep state in DRX mode during the DRX activation period, wherein the wake-up signal for the UE is received from an access network entity using the first transmit beam and the second transmit beam in the first transmit beam set. While operating in the sleep state of the DRX mode, the wake-up signal is received via one of the first or second transmit beams; During the DRX activation period and at least in part based on the receipt of the wake-up signal, a second transmit beam set is used and a set of signals received from the access network entity according to the beam sweep configuration is received, the set of signals including reference signals, synchronization signals, or combinations thereof; Select a transmit beam from the second transmit beam set for the UE to use for receiving downlink transmissions from the access network entity; During the DRX activation period, an indication of the selected transmit beam is transmitted to the access network entity. as well as Control channel transmissions for scheduling data channel resources are received on the selected transmit beam during the DRX activation period, based at least in part on the transmission of the instruction.

2. The method according to claim 1, further comprising: Decode the signal set, wherein the signal set is encoded using a higher code rate than that used to encode the awakening signal; as well as Determine the signal quality associated with the decoded signal set, wherein the transmit beam is selected based on a signal quality threshold.

3. The method according to claim 1, further comprising: Receive at least a portion of a beam management configuration for selecting the transmission beam from the second transmission beam set, which is part of the wake-up signal.

4. The method of claim 1, further comprising: Receive the downlink transmissions transmitted by the access network entity using a selected transmit beam, wherein the downlink transmissions include physical downlink control channel (PDCCH), or resource grants, or downlink data, or a combination thereof.

5. The method according to claim 1, wherein: The reference signal includes a demodulation reference signal (DMRS), a tracking reference signal (TRS), a phase compensation reference signal (PC-RS), or a channel state information reference signal (SCI-RS), or a combination thereof; as well as The synchronization signals include the primary synchronization signal (PSS), the secondary synchronization signal (SSS), the demodulation reference signal (DMRS), the physical broadcast channel (PBCH) signal, or a combination thereof.

6. A method for conducting wireless communication at an access network entity, comprising: The Discontinuous Reception (DRX) mode configuration is transmitted to the User Equipment (UE), which configures a first transmit beam and a second transmit beam in a first transmit beam set to receive a wake-up signal so that the UE wakes up from the sleep state of DRX mode during the DRX activation duration. Identification data can be transmitted to a UE operating in DRX mode; as well as At least in part based on the availability of the identified data, the wake-up signal is transmitted to the UE to wake the UE from the sleep state of the DRX mode during the DRX activation period, and the wake-up signal for the UE is transmitted using the first transmit beam and the second transmit beam in the first transmit beam set; A second transmit beam set is used and a set of signals is transmitted to the UE during the DRX activation duration according to the beam sweep configuration, the set of signals including a reference signal, a synchronization signal, or a combination thereof. During the DRX activation period, the UE receives an indication of the transmit beam selected by the UE from the second transmit beam set for the UE to use for receiving downlink transmissions; as well as Control channel transmissions for scheduling data channel resources are carried out on the selected transmit beam during the DRX activation period, based at least in part on receiving the instruction.

7. The method of claim 6, further comprising: Before transmitting the DRX mode configuration, the UE is configured to operate in the DRX mode while monitoring the first transmit beam set to receive a second signal set from the access network entity, the second signal set including a reference signal, or a synchronization signal, or a combination thereof.

8. The method of claim 7, further comprising: After configuring the UE to monitor the first transmit beam set to receive the second signal set and before transmitting the DRX mode configuration, the UE receives a selection of the first transmit beam and the second transmit beam, wherein the DRX mode configuration configures the first transmit beam and the second transmit beam for receiving the wake-up signal based at least in part on the second selection of the first transmit beam and the second transmit beam received.

9. The method according to claim 8, wherein, Receiving the selection of the first transmit beam and the second transmit beam includes: Receive beam recovery signals that identify the first transmit beam and the second transmit beam.

10. The method of claim 7, further comprising: At least in part, this is based on configuring the UE to monitor the first transmit beam set to receive the second signal set and transmitting a second DRX mode configuration before transmitting the DRX mode configuration, the second DRX mode configuration configuring the UE to monitor the third and fourth transmit beams in the first transmit beam set to look for a wake-up signal.

11. The method of claim 10, further comprising: Based at least in part on the second signal set, determine the link quality thresholds for decoding the wake-up signal with respect to the third and fourth transmit beams; as well as The UE is configured to transmit a selection of an alternative transmit beam when the link quality of the third or fourth transmit beam fails to meet a determined link quality threshold, wherein the DRX mode configuration of the first and second transmit beams for receiving the wake-up signal is based at least in part on the fact that the link quality of the third or fourth transmit beam fails to meet the determined link quality threshold.

12. The method of claim 6, further comprising: The UE is configured to transmit transmit beam selection at predetermined periods.

13. The method according to claim 6, wherein: The reference signal includes a demodulation reference signal (DMRS), a tracking reference signal (TRS), a phase compensation reference signal (PC-RS), or a channel state information reference signal (SCI-RS), or a combination thereof; as well as The synchronization signals include the primary synchronization signal (PSS), the secondary synchronization signal (SSS), the demodulation reference signal (DMRS), the physical broadcast channel (PBCH) signal, or a combination thereof.

14. The method according to claim 6, wherein, The first transmitted beam, or the second transmitted beam, or both of them are pseudo-omnidirectional beams.

15. The method according to claim 6, wherein, The wake-up signal may include narrowband frequency modulation, or a reference signal that varies depending on the UE, or a physical downlink control channel (PDCCH) that includes multiple cyclic redundancy check (CRC) bits scrambled by the UE's C-RNTI, or a combination thereof.

16. A user equipment (UE), comprising: processor; The memory is in electronic communication with the processor; as well as Instructions stored in the memory, operable to cause the processor to perform operations including the following: A Discontinuous Reception (DRX) mode configuration is provided, wherein a first transmit beam and a second transmit beam in a first transmit beam set are configured to receive a wake-up signal to wake the UE from a sleep state in DRX mode during the DRX activation period, wherein the wake-up signal for the UE is received from an access network entity using the first transmit beam and the second transmit beam in the first transmit beam set. While operating in the sleep state of the DRX mode, the wake-up signal is received via one of the first or second transmit beams; During the DRX activation period and at least in part based on the receipt of the wake-up signal, a second transmit beam set is used and a set of signals received from the access network entity according to the beam sweep configuration is received, the set of signals including reference signals, synchronization signals, or combinations thereof; Select a transmit beam from the second transmit beam set for the UE to use for receiving downlink transmissions from the access network entity; as well as During the DRX activation period, an indication of the selected transmit beam is transmitted to the access network entity. as well as Control channel transmissions for scheduling data channel resources are received on the selected transmit beam during the DRX activation period, based at least in part on the transmission of the instruction.

17. The user equipment of claim 16, wherein the operation further comprises: Decode the signal set, wherein the signal set is encoded using a higher code rate than that used to encode the awakening signal; as well as Determine the signal quality associated with the decoded signal set, wherein the transmit beam is selected based on a signal quality threshold.

18. The user equipment of claim 16, wherein the operation further comprises: Receive at least a portion of a beam management configuration for selecting the transmission beam from the second transmission beam set, which is part of the wake-up signal.

19. An access network entity, comprising: processor; The memory is in electronic communication with the processor; as well as Instructions stored in the memory, operable to cause the processor to perform operations including the following: The Discontinuous Reception (DRX) mode configuration is transmitted to the User Equipment (UE), which configures a first transmit beam and a second transmit beam in a first transmit beam set to receive a wake-up signal so that the UE wakes up from the sleep state of DRX mode during the DRX activation duration. Identification data can be transmitted to a UE operating in DRX mode; At least in part based on the availability of the identified data, the wake-up signal is transmitted to the UE to wake the UE from the sleep state of the DRX mode, and the wake-up signal for the UE is transmitted using the first transmit beam and the second transmit beam in the first transmit beam set; A second transmit beam set is used and a set of signals is transmitted to the UE during the DRX activation duration according to the beam sweep configuration, the set of signals including a reference signal, a synchronization signal, or a combination thereof. During the DRX activation period, the UE receives an indication of the transmit beam selected by the UE from the second transmit beam set for the UE to use for receiving downlink transmissions; as well as Control channel transmissions for scheduling data channel resources are carried out on the selected transmit beam during the DRX activation period, based at least in part on receiving the instruction.

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