High-Speed Beam Management

Abstract

Certain aspects of the present disclosure provide techniques for high-speed beam management. A method executable by a user equipment (UE) includes: receiving a beamformed signal from at least one base station (BS); determining, based on the received signal, that the UE is in a high mobility state and one or more parameters associated with the high mobility state; transmitting at least one of the one or more parameters to the at least one BS; and communicating with the at least one BS based on the one or more parameters.

Description

[0001] Background

[0002] Public domain

[0003] Aspects of the present disclosure relate to wireless communication and, in particular, to various techniques and apparatuses for beam management when a user equipment is in a high-mobility state.

[0004] Description of related technologies

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasting, etc. These wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

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

[0007] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0008] Overview

[0009] The systems, methods, and devices of the present disclosure each have several aspects, and no single aspect alone is responsible for their desirable attributes. Without limiting the scope of the present disclosure as set forth in the appended claims, some features will now be briefly discussed. After considering this discussion and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide the advantages of improved beam management in high-speed applications.

[0010] Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes: receiving a beamformed signal from at least one base station (BS); determining, based on the received signal, that the UE is in a high mobility state and one or more parameters associated with the high mobility state; transmitting at least one of the one or more parameters to the at least one BS; and communicating with the at least one BS based on the one or more parameters.

[0011] Certain aspects provide a method for wireless communication by a base station (BS). The method generally includes: receiving from a UE one or more parameters associated with a high mobility state of the UE; determining, at least in part based on the one or more parameters, a first discontinuous reception (DRX) configuration; transmitting an indication of the first DRX configuration to the UE; and communicating with the UE based on the first DRX configuration.

[0012] Certain aspects provide a method for wireless communication by a UE. The method generally includes: transmitting a beamformed signal to at least one base station (BS) when the UE is in a high mobility state; receiving from the at least one BS an indication of a DRX configuration that is at least in part based on the high mobility state of the UE; and communicating with the at least one BS based on the DRX configuration.

[0013] Certain aspects provide a method for wireless communication by a BS. The method generally includes: receiving a beamformed signal from at least one user equipment (UE); determining, based on the received signal, that the at least one UE is in a high mobility state and a discontinuous reception (DRX) configuration that is at least in part based on the high mobility state of the at least one UE; transmitting an indication of the DRX configuration to the at least one UE; and communicating with the at least one UE based on the DRX configuration.

[0014] Aspects of the present disclosure provide apparatuses, devices, processors, and computer-readable media for performing the methods described herein.

[0015] To achieve the foregoing and related purposes, one or more aspects include the features that are fully described hereinafter and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of one or more aspects. However, these features are only indicative of several ways in which the principles of the various aspects may be employed. Brief Description of the Drawings

[0017] To understand the manner in which the above-recited features of the present disclosure can be obtained, a more particular description, in which some aspects are illustrated in the drawings, can be had with reference to the aspects. It should be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope since the description may admit to other equally effective aspects.

[0018] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0019] Figure 2 is a block diagram conceptually illustrating the design of an example base station (BS) and user equipment (UE) in accordance with certain aspects of the present disclosure.

[0020] Figure 3 is a diagram of an example wireless communication network for high-speed applications in accordance with certain aspects of the present disclosure.

[0021] Figure 4A is a diagram of an example beam condition for high-speed applications in accordance with certain aspects of the present disclosure.

[0022] Figure 4B illustrates an example Doppler shift encountered by a UE over time in accordance with certain aspects of the present disclosure.

[0023] Figure 5 illustrates an example of beam switching performed by a UE for high-speed applications in accordance with certain aspects of the present disclosure.

[0024] Figure 6 illustrates an example discontinuous reception (DRX) cycle in accordance with certain aspects of the present disclosure.

[0025] Figure 7 illustrates an example of beam misalignment for high-speed applications in accordance with certain aspects of the present disclosure.

[0026] Figure 8 is a call flow diagram illustrating an example signaling for managing beams in a DRX cycle in accordance with aspects of the present disclosure.

[0027] Figure 9A illustrates an example in which the on-duration of a long or short DRX cycle can be configured for a UE in accordance with certain aspects of the present disclosure.

[0028] Figure 9B An example of a DRX pattern in accordance with certain aspects of the present disclosure is illustrated.

[0029] Figure 10 is a flowchart illustrating example operations for wireless communication by a UE in accordance with certain aspects of the present disclosure.

[0030] Figure 11 is a flowchart illustrating example operations for wireless communication by a BS in accordance with certain aspects of the present disclosure.

[0031] Figure 12 is a flowchart illustrating additional example operations for wireless communication by a UE in accordance with certain aspects of the present disclosure.

[0032] Figure 13 is a flowchart illustrating additional example operations for wireless communication by a BS in accordance with certain aspects of the present disclosure.

[0033] Figure 14 A communication device (e.g., a UE or a BS) in accordance with aspects of the present disclosure that may include various components configured to perform operations for the techniques disclosed herein is illustrated.

[0034] For ease of understanding, wherever possible, the same reference numerals have been used to designate identical elements common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0035] Detailed Description

[0036] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for managing beams in a discontinuous reception (DRX) cycle when a UE is in a high-mobility state. In certain aspects, the UE may be configured with a DRX cycle adapted to Doppler frequency shifts and angular changes in the angle of arrival (AOA) encountered by the UE when in a high-mobility state. The DRX cycle may be adapted to have certain on durations of the DRX cycle aligned with changes in the Doppler frequency shift and / or beam AOA. For example, the on duration of a long DRX cycle may be aligned with the cell edge where the UE encounters known Doppler frequency shifts and beam AOA. In certain situations, when the UE passes by the BS, the on duration of a short DRX cycle may be aligned with the angular change in the beam AOA, such as as Figure 5 depicted.

[0037] The following description provides examples of high-speed beam management in a communication system and is not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functionality and arrangement of the elements discussed without departing from the scope of the disclosure. Various examples may appropriately omit, substitute, or add various procedures or components. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or practice a method. Additionally, the scope of the disclosure is intended to cover such apparatus or methods practiced using other structures, functionality, or a combination of structures and functionality that supplement or are additional to the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be implemented by one or more elements of the claims. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" need not be construed as superior or better than other aspects.

[0038] Generally, any number of wireless networks may be deployed in a given geographical area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency may support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, a 5G NR RAT network may be deployed.

[0039] Figure 1 An example wireless communication network 100 in which aspects of the disclosure may be performed is illustrated. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network).

[0040] As Figure 1 shown, according to aspects of the disclosure, BS 110a includes a DRX manager 112 that configures a DRX configuration for the UE that is adapted for a high mobility state of the UE. According to aspects of the disclosure, UE 120a includes a DRX manager 122 that configures a DRX configuration for the UE that is adapted for a high mobility state of the UE.

[0041] As Figure 1As explained, the wireless communication network 100 may include several base stations (BS) 110a - z (each also individually referred to herein as BS 110 or collectively as BS 110) and other network entities. The BS 110 may provide communication coverage for a specific geographical area (sometimes referred to as a "cell"), which may be stationary or may move depending on the location of the mobile BS 110. In some examples, the BS 110 may be interconnected with each other and / or interconnected to one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.). In Figure 1 In the example shown in, BS 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BS 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells. The BS 110 communicates with user equipment (UE) 120a - y (each also individually referred to herein as UE 120 or collectively as UE 120) in the wireless communication network 100. The UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.

[0042] The wireless communication network 100 may also include relay stations (e.g., relay station 110r) (also referred to as relays, etc.), which receive transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and send the transmissions of the data and / or other information to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between the UEs 120 to facilitate communication between the devices.

[0043] The network controller 130 may be coupled to a set of BS 110 and provide coordination and control for these BS 110. The network controller 130 may communicate with the BS 110 via the backhaul. The BS 110 may also communicate with each other via wireless or wired backhaul (e.g., directly or indirectly).

[0044] Figure 2 Examples of components of BS 110 and UE 120 that may be used to implement aspects of the present disclosure are illustrated (e.g., in the wireless communication network 100 of Figure 1 ).

[0045] At BS 110, the transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be used for physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), etc. The data may be used for physical downlink shared channel (PDSCH), etc. The processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for primary synchronization signal (PSS), secondary synchronization signal (SSS), and PBCH demodulation reference signal (DMRS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, and / or reference symbols, if applicable, and may provide the output symbol streams to modulators (MOD) 232a - 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a - 232t may be transmitted via antennas 234a - 234t, respectively.

[0046] At UE 120, antennas 252a - 252r may receive the downlink signals from BS 110 and may provide the received signals to demodulators (DEMOD) 254a - 254r in the transceiver, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) its respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all demodulators 254a - 254r, perform MIMO detection on these received symbols, if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate, de-interleave, and decode) these detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the decoded control information to controller / processor 280.

[0047] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 (e.g., data for the Physical Uplink Shared Channel (PUSCH)) and control information from the controller / processor 280 (e.g., control information for the Physical Uplink Control Channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., sounding reference signals (SRS)). The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 when applicable, further processed by the demodulators 254a - 254r in the transceiver (e.g., for SC - FDM, etc.), and transmitted to the BS 110. At the BS 110, the uplink signals from the UE 120 may be received by the antenna 234, processed by the modulator 232, detected by the MIMO detector 236 when applicable, and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240.

[0048] The memories 242 and 282 may store data and program codes for the BS 110 and the UE 120 respectively. The scheduler 244 may schedule the UE for data transmission on the downlink and / or uplink.

[0049] The controller / processor 280 and / or other processors and modules at the UE 120 may execute or direct the execution of the processes for the techniques described herein. For example, as Figure 2 shown, according to aspects described herein, the controller / processor 240 of the BS 110 has a DRX manager 241 that configures the DRX configuration for the UE to be adapted to the high - mobility state of the UE. According to aspects described herein, the controller / processor 280 of the UE 120 has a DRX manager 281 that configures the DRX configuration for the UE to be adapted to the high - mobility state of the UE. Although shown at the controller / processor, other components of the UE 120 and the BS 110 may also be used to perform the operations described herein.

[0050] In some cases, the UE may be in a high - mobility state, e.g., when the UE is traveling on a high - speed train or when the UE is traveling in a tunnel. In such cases, the BSs may be arranged in a linear deployment near the track and along the track or tunnel to provide continuous coverage. For example, Figure 3An example wireless communication network 300 in accordance with certain aspects of the present disclosure is illustrated, where BSs 110a and 110b are arranged along a track or tunnel. Since multiple BSs can be arranged along a track or tunnel, a UE 120 can switch from one BS to another, e.g., from BS 110a to 110b. In high-mobility scenarios, a UE can perform frequent handovers between adjacent BSs arranged along a track or tunnel, which may result in increased latency and / or connection loss. In some cases, some of the BSs along the track or tunnel may have one or two remote radio heads (RRHs) that provide coverage along a portion of the track or tunnel, which is different from a typical BS that uses radio heads arranged in three 120° sectors to provide cellular coverage. To reduce inter-carrier interference (ICI) and improve handovers, the BSs arranged along the track or tunnel can communicate with the UE at a single carrier frequency (e.g., 800 MHz, 4 GHz, or 30 GHz).

[0051] High-mobility scenarios can exhibit large Doppler frequency shifts (e.g., >800 Hz). For example, Figure 4A and 4B illustrates the Doppler effect on wireless communication in high-mobility applications in accordance with certain aspects of the present disclosure. Figure 4A Illustrates that UE 120 is in a high-mobility state and communicates with BS110 at three different positions along the track (at the edge of the cell coverage of BS 110 and when UE 120 passes near BS 110). Figure 4B Illustrates the Doppler frequency shifts encountered by UE 120 over time. When UE 120 travels along the track, UE 120 may generally encounter two Doppler frequency shift scenarios. In the first scenario (Scenario 1), e.g., when UE 120 is located at the edge of the cell coverage of BS 110, UE 120 may experience a large Doppler frequency shift (e.g., +800 Hz or –800 Hz), and frequency tracking may be difficult in such cases. In the second scenario (Scenario 2), e.g., when UE 120 passes near BS 110, UE 120 may experience various Doppler frequency shifts (e.g., from +800 Hz to -800 Hz or from -800 Hz to +800 Hz). Although, for purposes of facilitating understanding, the examples provided herein are described with respect to a UE encountering the Doppler effect on wireless transmissions from a BS, aspects of the present disclosure can also be applied to a BS encountering the Doppler effect on wireless transmissions from a UE.

[0052] High-mobility scenarios can also exhibit frequent angular changes in the angle of arrival (AOA) and / or angle of departure (AOD) of transmissions, e.g., when a UE passes near a BS along a track or tunnel. As an example, Figure 5An example of beam switching that can be performed by UE 120 and / or BS 110 when UE 120 passes near BS 110 is described. As shown, when UE 120 passes by BS 110, UE 120 can communicate with BS 110 by switching from beam 502 to beam 504, switching to beam 506, or switching to beam 508. In some cases, when UE 120 passes by BS 110, BS 110 can communicate with the UE by switching from beam 510 to beam 512, switching to beam 514, or switching to beam 516. In some cases, UE 120 and / or BS 110 can perform fast beam tracking / switching to maintain the connection.

[0053] A UE in a wireless communication network can operate in one of several modes (such as idle mode or connected mode) at any given time. In the connected mode, the UE can actively exchange data with one or more BSs. In the idle mode, the UE can power down (or operate in a low-power state) for a certain period of time to save power (e.g., battery power) and can wake up periodically to monitor paging messages (e.g., on the PDCCH). The paging message can alert the UE of incoming calls and / or data.

[0054] The UE can periodically monitor paging messages based on a discontinuous reception (DRX) cycle. The DRX cycle can indicate when the UE monitors paging messages and when the UE powers down or enters a low-power mode. The UE can be configured with a DRX configuration having various parameters. For example, the DRX configuration parameters can include the DRX cycle, the long DRX cycle start offset, the DRX inactivity timer, the on-duration timer, the short DRX cycle, and the short DRX cycle timer. In some cases, the UE can be configured with only a long DRX cycle or both long and short DRX cycles. In other words, if the long DRX cycle is configured, the short DRX cycle can be optional.

[0055] The radio access network (RAN) can implicitly indicate the DRX cycle to the UE via subframe time and long DRX cycle start offset, which provides the subframes at the start of the long DRX cycle and the short DRX cycle. The on-duration is the duration during which the UE is powered on to monitor PDCCH transmissions at the start of the DRX cycle. The DRX inactivity timer can specify the duration during which the UE remains powered on to monitor new UL or DL transmissions. That is to say, the DRX inactivity timer is the duration after a PDCCH occasion in which the PDCCH indicates a new UL or DL transmission. When the DRX inactivity timer is started, the UE remains in the 'on state', which may extend the on-period into the off-period (e.g., low power state). The short DRX cycle is a DRX cycle that can be implemented within the 'off' period of the long DRX cycle. The short DRX cycle timer is the duration during which the UE follows the short DRX cycle. For example, the short DRX cycle can be the number of consecutive subframes that the UE follows the short DRX cycle after the DRX inactivity timer has expired.

[0056] Figure 6 An example DRX cycle implementation indicated by the subframe number (SFN) on four frames is illustrated. As shown, the UE can monitor the PDCCH at a PDCCH occasion (e.g., at the first subframe of SFN0), and the DRX inactivity timer can run after the PDCCH occasion (e.g., for the next four subframes). After the DRX inactivity timer expires, the short DRX cycle timer can start running, and the UE can monitor the PDCCH occasion during the start of one or more short DRX cycles. After the short DRX cycle timer expires, the UE can switch to monitoring the PDCCH occasion on the long DRX cycle, as shown in SFN2. In SFN3, the UE can receive a PDCCH message that triggers the short DRX cycle again after the DRX inactivity timer has expired.

[0057] In high mobility scenarios such as high-speed trains or tunnel applications, beam tracking and frequency tracking can be difficult when the UE is in a low power mode and monitoring the PDCCH occasion in a (long or short) DRX cycle. For example, Figure 7An example is described in which the beam between the UE 120 and the BS 110 may become misaligned during the DRX cycle when the UE is in a high mobility state. As shown, the UE 120 may monitor PDCCH opportunities via beam 702 during the first on-duration 714 of the DRX cycle. As the UE moves forward on its orbit during the off-duration of the DRX cycle, the UE 120 may continue to communicate with the BS 110 using beam 702 and may experience poor connection or connection loss with the BS 110 due to the misalignment between beam 702 and 710. During the next on-duration 716 of the DRX cycle, the UE 120 may perform a beam switching procedure, such as switching from beam 704 to beam 706. In some cases, the UE 120 may miss PDCCH opportunities during the beam switching procedure, resulting in lost paging and increased latency. In some aspects, as the UE 120 travels along its orbit, the BS 110 may communicate with the UE 120 using various beams 708, 710, 712.

[0058] Example High-Speed Beam Management

[0059] Aspects of the present disclosure provide various apparatuses and techniques for managing beams in a DRX cycle when a UE is in a high mobility state (e.g., moving at a speed of 350 km / h to 650 km / h). In some aspects, the UE may be configured with a DRX cycle adapted to the Doppler shift and angular changes in AOA / AOD that the UE encounters when in a high mobility state. The DRX cycle may be adapted to have certain on-durations of the DRX cycle aligned with changes in the Doppler shift and / or beam AOA. For example, the on-duration of a long DRX cycle may be aligned with the cell edge where the UE encounters a known Doppler shift and beam AOA. In some cases, when the UE passes by the BS, e.g., as depicted in Figure 5 , the on-duration of a short DRX cycle may be aligned with the angular change in the beam AOA.

[0060] In some aspects, the UE may report parameters indicating the high mobility state of the UE to the BS and, in some cases, implement an updated DRX cycle configuration without input from the BS. For example, the UE may measure signals from the BS and identify that the UE is in a high mobility state. The UE may report various parameters (e.g., measurements, events, or DRX configurations) associated with the high mobility state of the UE to the BS. In aspects, the UE may implement changes to the DRX cycle that are adapted to changes in the Doppler shift and / or beam AOA.

[0061] In some aspects, the UE may report parameters to the BS, and the BS may configure the UE to have a DRX cycle adapted for high-speed applications. For example, after reporting the parameters to the BS, the UE may receive an updated DRX configuration from the BS, where the updated DRX configuration is adapted to the Doppler shift and beam AOA changes along an orbit or tunnel.

[0062] In some aspects, the BS may direct the DRX cycle configuration for high-speed applications. For example, the BS may measure signals from the UE and configure the UE to have a DRX configuration adapted to the Doppler shift and / or AOA changes of the high-mobility state of the UE.

[0063] Figure 8 is a call flow diagram illustrating example signaling for managing beams in a DRX cycle when a UE is in a high-mobility state in accordance with aspects of the present disclosure. At 802, UE 120 may receive a beamformed signal (e.g., PSS, SSS, DMRS, phase-tracking reference signal (PT-RS), channel state information reference signal (CSI-RS), etc.) from BS 110. At 804, UE 120 may determine, based on the received signal, that the UE is in a high-mobility (HM) state and one or more parameters associated with the HM state of the UE (e.g., an indication of a measurement, an event, or a DRX configuration). For example, the UE may determine that the UE is in the HM state based on, for example, the Doppler shift measured in the received signal and / or a change in the beam AOA detected from these signals. At 806, UE 120 may report the one or more parameters to BS 110. For example, UE 120 may report measurements of the signal, which may indicate that the UE is in the HM state. In some cases, UE 120 may report an indication of various events associated with the HM state (such as an indication that the UE is in the HM state, an indication that there is a large Doppler shift, or an indication that there is a change in the beam AOA). In some cases, UE 120 may request a DRX configuration adapted to the HM state of the UE. In aspects, the request for the DRX configuration may include various DRX parameters (such as an indication of a long DRX cycle, an indication of a short DRX cycle, etc.).

[0064] Alternatively or optionally, at 808, BS 110 may determine a DRX configuration for UE 120 based at least in part on the one or more parameters. In aspects, the DRX configuration may be adapted to the HM state of the UE. In some aspects, the DRX configuration may include a long DRX cycle, a short DRX cycle, a DRX pattern (a plurality of long and short DRX cycles adapted to an orbit or a tunnel), or a configuration that disables the DRX cycle and configures the UE to stay in a connected state. At 810, BS 110 may convey an indication of the DRX configuration to UE 120 via control signaling including, for example, radio resource control (RRC) signaling, downlink control information (DCI), or media access control (MAC) control element (CE).

[0065] At 812, UE 120 may communicate with BS 110 based on the one or more parameters. For example, UE 120 may monitor PDCCH occasions according to a DRX configuration derived from the one or more parameters (e.g., measurements of a beamformed signal). In some cases, UE 120 may implement a DRX configuration adapted according to the one or more parameters with or without an indication from BS 110 at 810. For example, UE 120 may monitor PDCCH occasions based on a DRX configuration derived by UE 120 from measurements made at 802 and reported to BS 110. UE 120 may select a DRX configuration based on certain rules related to measured or detected HM state events. These rules may also be known to BS 110 such that BS 110 may page UE 120 according to the DRX configuration employed by UE 120. In some cases, BS 110 may direct UE 120 to update the DRX configuration. For example, UE 120 may monitor PDCCH occasions based on the DRX configuration received from BS 110 at 810.

[0066] In some aspects, the BS may perform measurements and instruct the UE to use an updated DRX configuration based on the HM state of the UE. For example, at 814, BS 110 may receive a beamformed signal (e.g., sounding reference signal (SRS), DMRS, PT-RS, etc.) from UE 120. At 816, BS 110 may determine that UE 120 is in an HM state and a DRX configuration based on the HM state of the UE, based on the received signal. At 818, BS 110 may convey an indication of the DRX configuration to UE 120. At 820, UE 120 may communicate with BS 110 based on the indicated DRX configuration. For example, UE 120 may monitor PDCCH occasions according to the indicated DRX configuration.

[0067] While, for purposes of promoting understanding, the examples provided herein are described in terms of a single UE communicating with a single BS, aspects of the present disclosure can also be applied to beam management for, e.g., a plurality of UEs and BSs deployed along a high-speed railway. For example, at 802, the UE can receive beamformed signals from multiple BSs, and at 810, the UE can receive the DRX configuration from a different BS. In some cases, at 812, the UE can communicate with multiple BSs along a tunnel or track based on the UE's HM state. In various cases, at 814, the BS can receive beamformed signals from multiple UEs and, at 818, configure different UEs based on measurements of the beamformed signals.

[0068] In aspects, the DRX configuration can be adapted to the UE's HM state and / or the RF conditions of the track or tunnel. For example, Figure 9A illustrates an example in accordance with some aspects of the present disclosure in which the on-duration of a long or short DRX cycle can be configured for a UE. As shown, UE 120 can be configured to monitor PDCCH opportunities at on-duration 902 during a DRX cycle at the edge of the cell of BS 110, such as when the UE is located at the cell edge, as Figure 4A and 4B depicted in Scenario 1. In such cases, the beam AOA / AOD can be fairly constant, e.g., such that UE 120 can use a single beam for each PDCCH opportunity. That is, the beam direction may not change at the edge of the cell coverage of BS 110, e.g., when the UE enters or exits cell coverage. The Doppler shift at the cell edge can also be estimated so that UE 120 can account for the Doppler effect when monitoring PDCCH opportunities.

[0069] In some cases, the on-duration of a short DRX cycle can be aligned with the angular shift of the beam AOA as the UE passes by the BS. As an example, referring to Figure 5 , UE 120 can be configured with the on-duration of a short DRX cycle at each point where the UE is using beams 502, 504, 506, and 508. Such short DRX cycle configurations can enable the UE to perform pre-programmed beam switching at each on-duration. For example, each of the on-durations of the short DRX cycle can be associated with a certain beam to achieve coherent beam alignment during PDCCH monitoring opportunities of the short DRX cycle.

[0070] In some cases, the UE may be configured with a DRX mode adapted to the HM state of the UE and / or the RF conditions of the orbit or tunnel. The DRX mode may be determined based on measurements of the Doppler effect and beam angle changes. In some aspects, the DRX mode may indicate that long DRX cycles and short DRX cycles switch periodically depending on the orbit or tunnel scenario. Figure 9B Illustrates an example DRX mode in which the on-duration of long or short DRX cycles can be configured for the UE according to some aspects of the present disclosure. As shown, the on-duration 904, 908 of the long DRX cycle can be configured at the edge of the cell coverage of BS 110a and BS 110b, while the on-duration 906, 910 of the short DRX cycle can be configured when the UE 120 passes through BS 110a, 110b. For example, as described herein with reference to Figure 5 what is described. In some aspects, in the DRX mode, the short DRX cycle can be triggered based on the position of the UE relative to the BS without the DRX inactive timer expiring. For example, when the UE 120 enters a certain vicinity area with respect to BS 110a, the UE 120 can initiate short DRX cycles associated with various beams. In various aspects, the long or short DRX cycle can be set based on a time unit (e.g., milliseconds) or subframe offset (or other time-domain resources such as time slots, mini-slots, or symbols) corresponding to the position of the UE on the orbit or tunnel.

[0071] As another example of the DRX mode, reference may be made to Figure 9B exchanging long DRX cycles and short DRX cycles. That is, when the UE is located at the cell edge, short DRX cycles can be scheduled, and when the UE passes through the BS, the on-duration of the long DRX cycle can be scheduled.

[0072] Figure 10 Is a flowchart illustrating an example operation 1000 for wireless communication according to some aspects of the present disclosure. Operation 1000 can be performed, for example, by a UE (e.g., Figure 3 the UE 120). Operation 1000 can be implemented as a software component executed and run on one or more processors (e.g., Figure 2 the controller / processor 280). In addition, the signal transmission and reception by the UE in operation 1000 can be implemented, for example, by one or more antennas (e.g., Figure 2 the antenna 252). In some aspects, the signal transmission and / or reception by the UE can be implemented by obtaining and / or outputting signals via the bus interface of one or more processors (e.g., the controller / processor 280).

[0073] Operation 1000 can start at 1002 with the UE receiving from at least one BS (e.g., Figure 3The BSs 120a, 120b) receive the beamformed signals. At 1004, the UE may determine, based on the received signals, that the UE is in a high mobility state and one or more parameters associated with the high mobility state. At 1006, the UE may transmit at least one of the one or more parameters to the at least one BS. At 1008, the UE may communicate with the at least one BS based on the one or more parameters.

[0074] In various aspects, the parameters determined by the UE at 1004 may include various indications of measurements, events, or DRX configurations associated with the high mobility state of the UE. For example, the one or more parameters may include at least one of the following: a first indication of one or more measurements of the signals, where the measurements indicate the high mobility state of the UE, a second indication of one or more events associated with the high mobility state of the UE, or a third indication of a DRX configuration based on the high mobility state of the UE.

[0075] In various aspects, the measurements of the received signals may include various attributes of the signals or channels. For example, the measurements may include at least one of Doppler shift, angle change associated with the angle of arrival of the signals, Doppler spread, average delay, delay spread, or the signal quality of the signals. The signal quality may include channel quality indicator, signal-to-noise ratio (SNR), signal-to-interference-plus-noise ratio (SINR), signal-to-noise-plus-distortion ratio (SNDR), received signal strength indicator (RSSI), reference signal received power (RSRP), reference signal received quality (RSRQ), precoding matrix indicator (PMI), etc.

[0076] In various aspects, the events reported to the BS at 1006 may include various events associated with the high mobility state of the UE. For example, the events include at least one of high speed events, Doppler shift events, or angle change events. In various aspects, the high speed event may indicate that the UE is experiencing a high mobility state. In various aspects, the Doppler shift event may indicate that the UE is experiencing a large frequency shift in the carrier frequency due to the Doppler effect (such as the Doppler shift encountered in Figure 4A and 4B in case 1). In some aspects, the angle change event may indicate that the UE experiences frequent changes in the beam AOA (such as the beam changes depicted in Figure 5 ).

[0077] In some aspects, the DRX configuration reported to the BS at 1006 may include aspects of long or short DRX cycles, such as including DRX cycle, long DRX cycle start offset, DRX inactivity timer, on-duration timer, short DRX cycle, and / or short DRX cycle timer. In various aspects, the DRX configuration may include at least one of the following: configuration for a long DRX cycle (e.g., the DRX cycle described herein with reference to Figure 9A ), configuration for a short DRX cycle (e.g., the short DRX cycle described herein with reference to Figure 5 ), DRX mode (e.g., the DRX mode described herein with reference to Figure 9B ), or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. In various aspects, the configuration for long or short DRX cycles may be associated with one or more beam AOAs that enable the UE to perform appropriate beam switching during PDCCH occasions when the UE is traveling along an orbit or a tunnel.

[0078] In some aspects, the configuration that keeps the UE in a connected state may configure the UE to monitor PDCCH occasions during a part of the off-duration of the DRX cycle or the entire off-duration of the DRX cycle. For example, during the off-duration of a long or short DRX cycle, the UE may remain in a connected state to monitor PDCCH occasions. In various aspects, the DRX configuration reported to the BS at 1006 may be a request for an updated DRX configuration that takes into account the high mobility state of the UE.

[0079] In some aspects, the UE may update the DRX configuration based on the high mobility state of the UE. In some cases, communicating with the at least one BS may include: communicating with the BS based on the DRX configuration included in the one or more parameters. In various aspects, the DRX configuration includes at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle.

[0080] In some aspects, the BS may configure the UE to have a DRX configuration based on the high mobility state of the UE. For example, operation 1000 may further include: the UE receiving an indication of the DRX configuration from the at least one BS. The UE may communicate with the BS based on the DRX configuration. In various aspects, the DRX configuration includes at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. The indication of the DRX configuration may be received via RRC signaling, DCI, or MAC-CE.

[0081] In various aspects, the high mobility state may include various high-speed applications (such as high-speed trains or tunnels). In some aspects, the high mobility state may include the UE moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

[0082] In some aspects, at 1008, the UE may communicate with the at least one BS via a single carrier frequency. The carrier frequency may be in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz. The single carrier frequency can reduce inter-carrier interference caused by large Doppler frequency shifts encountered in the high mobility state. The single carrier frequency can improve handovers when the UE moves along a track or through a tunnel.

[0083] Figure 11 is a flowchart illustrating an example operation 1100 for wireless communication in accordance with certain aspects of the present disclosure. Operation 1100 may be performed, for example, by a BS (e.g., Figure 3 BS 110a). Operation 1100 may be complementary to operation 1000 performed by the UE. Operation 1100 may be implemented as a software component executed and run on one or more processors (e.g., Figure 2 controller / processor 240). Additionally, signal transmission and reception by the BS in operation 1100 may be implemented, for example, by one or more antennas (e.g., Figure 2 antenna 234). In some aspects, signal transmission and / or reception by the BS may be implemented by obtaining and / or outputting signals via a bus interface of one or more processors (e.g., controller / processor 240).

[0084] Operation 1100 may begin at 1102 with the BS receiving, from the UE (e.g., Figure 3 UE 120), one or more parameters associated with the high mobility state of the UE. At 1104, the BS may determine a first DRX configuration based at least in part on the one or more parameters. At 1106, the BS may transmit an indication of the first DRX configuration to the UE. At 1108, the BS may communicate with the UE based on the first DRX configuration.

[0085] In some aspects, the DRX configuration may indicate aspects of a DRX cycle adapted to a high mobility state of the UE. The DRX configuration may indicate a DRX cycle, a long DRX cycle start offset, a DRX inactivity timer, an on-duration timer, a short DRX cycle, and / or a short DRX cycle timer. For example, the first DRX configuration of operation 1100 may include at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. In some aspects, the configuration that keeps the UE in a connected state may configure the UE to monitor PDCCH opportunities during a part or the entire off-duration of the DRX cycle.

[0086] In various aspects, the BS may transmit an indication of the first DRX configuration via control signaling. For example, the indication of the first DRX configuration may be transmitted via RRC signaling, DCI, or MAC-CE.

[0087] In various aspects, the parameters received by the BS at 1102 may include various indications of measurements, events, or DRX configurations associated with the high mobility state of the UE. In some cases, the one or more parameters may include at least one of: a first indication of one or more measurements of signals received by the UE, where the measurements indicate the high mobility state of the UE, a second indication of one or more events associated with the high mobility state of the UE, or a third indication of a second DRX configuration based on the high mobility state of the UE.

[0088] In various aspects, the measurements received by the BS at 1102 may include various attributes of signals or channels monitored by the UE. For example, the measurements may include at least one of a Doppler frequency shift, an angle change associated with the angle of arrival of the signals, a Doppler spread, an average delay, a delay spread, or the signal quality of the signals. The signal quality may include a channel quality indicator, a signal-to-noise ratio (SNR), a signal-to-interference-plus-noise ratio (SINR), a signal-to-noise-plus-distortion ratio (SNDR), a received signal strength indicator (RSSI), a reference signal received power (RSRP), a reference signal received quality (RSRQ), a precoding matrix indicator (PMI), etc.

[0089] In various aspects, the events reported to the BS at 1102 may include various events associated with the high mobility state of the UE. For example, the events include at least one of a high-speed event, a Doppler frequency shift event, or an angle change event. In various aspects, the high-speed event may indicate that the UE is experiencing a high mobility state. In various aspects, the Doppler frequency shift event may indicate that the UE is experiencing a large frequency shift in the carrier frequency due to the Doppler effect (such as in Figure 4Aand 4B the Doppler frequency shift encountered in Scenario 1). In some aspects, this angle change event may indicate that the UE experiences frequent changes in beam AOA (such as Figure 5 the beam changes depicted in).

[0090] In some aspects, the second DRX configuration reported to the BS at 1102 may include aspects of long or short DRX cycles, such as including DRX cycle, long DRX cycle start offset, DRX inactivity timer, on-duration timer, short DRX cycle, and / or short DRX cycle timer. In various aspects, the second DRX configuration may include at least one of the following: a configuration for a long DRX cycle (e.g., the DRX cycle described herein with reference to Figure 9A ), a configuration for a short DRX cycle (e.g., the short DRX cycle described herein with reference to Figure 5 ), a DRX mode (e.g., the DRX mode described herein with reference to Figure 9B ), or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. In some aspects, the configuration that keeps the UE in a connected state may configure the UE to monitor PDCCH opportunities during a part or the entire off-duration of the DRX cycle. For example, during the off-duration of a long or short DRX cycle, the UE may remain in a connected state to monitor PDCCH opportunities. In various aspects, the second DRX configuration reported to the BS at 1102 may be a request for an updated DRX configuration that takes into account the high mobility state of the UE. That is, in some cases, one or more parameters received at 1102 may include a request for an updated DRX configuration.

[0091] In various aspects, the first DRX configuration may include the second DRX configuration. For example, the BS may adopt the second DRX configuration as the first DRX configuration. In various aspects, the first DRX configuration is different from the second DRX configuration. For example, the BS may adjust the second DRX configuration based on various factors, which results in the first DRX configuration.

[0092] In various aspects, the high mobility state may include various high-speed applications (such as high-speed trains or tunnels). In some aspects, the high mobility state may include the UE moving at a speed of 350 km / h to 650 km / h.

[0093] In some aspects, at 1108, the BS may communicate with the at least one BS via a single carrier frequency. The carrier frequency may be in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz. The single carrier frequency may reduce inter-carrier interference due to large Doppler frequency shifts encountered in high mobility states. The single carrier frequency may improve handovers when the UE moves along a track or in a tunnel.

[0094] Figure 12 is a flow chart illustrating example operation 1200 for wireless communication in accordance with certain aspects of the present disclosure. Operation 1200 may be performed, for example, by a UE (e.g., Figure 3 UE 120). Operation 1200 may be implemented as a software component executed and run on one or more processors (e.g., Figure 2 controller / processor 280). Further, signal transmission and reception by the UE in operation 1200 may be implemented, for example, by one or more antennas (e.g., Figure 2 antenna 252). In some aspects, signal transmission and / or reception by the UE may be implemented by obtaining and / or outputting signals via a bus interface of one or more processors (e.g., controller / processor 280).

[0095] Operation 1200 may begin at 1202 when the UE is in a high mobility state and the UE transmits a beamformed signal to at least one BS (e.g., Figure 3 BS 120a, 120b). At 1204, the UE may receive an indication of a DRX configuration that is at least partially based on the high mobility state of the UE from the at least one BS. At 1206, the UE may communicate with the at least one BS based on the DRX configuration.

[0096] In some aspects, the DRX configuration received by the UE at 1204 may include aspects of a long or short DRX cycle, such as including a DRX cycle, a long DRX cycle start offset, a DRX inactivity timer, an on-duration timer, a short DRX cycle, and / or a short DRX cycle timer. In aspects, the DRX configuration may include at least one of the following: a configuration for a long DRX cycle (e.g., the DRX cycle described herein with reference to Figure 9A ), a configuration for a short DRX cycle (e.g., the short DRX cycle described herein with reference to Figure 5 ), a DRX mode (e.g., the DRX mode described herein with reference to Figure 9BThe described DRX pattern), or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. In some aspects, the configuration that keeps the UE in the connected state may configure the UE to monitor PDCCH opportunities during a part or the entire duration of the DRX cycle when it is turned off. For example, during the off duration of a long or short DRX cycle, the UE may remain in the connected state to monitor PDCCH opportunities. The indication of the DRX configuration may be received via RRC signaling, DCI, or MAC-CE.

[0097] In various aspects, the UE may transmit various uplink reference signals at 1202. That is, the beamformed signal may include an uplink reference signal. The uplink reference signal may include at least one of SRS, DMRS, or PT-RS.

[0098] In various aspects, the high mobility state may include various high-speed applications (such as high-speed trains or tunnels). In some aspects, the high mobility state may include the UE moving at a speed of 350 km / h to 650 km / h.

[0099] In some aspects, at 1206, the UE may communicate with the at least one BS via a single carrier frequency. The carrier frequency may be in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz. The single carrier frequency can reduce the inter-carrier interference caused by the large Doppler frequency shift encountered in the high mobility state. The single carrier frequency can improve handovers when the UE moves along a track or in a tunnel.

[0100] Figure 13 is a flowchart illustrating an example operation 1300 for wireless communication according to certain aspects of the present disclosure. Operation 1300 may be performed, for example, by a BS (e.g., Figure 3 BS 110a). Operation 1300 may be complementary to operation 1200 performed by the UE. Operation 1300 may be implemented as a software component executed and run on one or more processors (e.g., Figure 2 controller / processor 240). In addition, the signal transmission and reception by the BS in operation 1300 may be implemented, for example, by one or more antennas (e.g., Figure 2 antenna 234). In some aspects, the signal transmission and / or reception by the BS may be implemented by obtaining and / or outputting signals via a bus interface of one or more processors (e.g., controller / processor 240).

[0101] Operation 1300 may start at 1302 with the BS receiving from at least one UE (e.g., Figure 3The UE 120) receives the beamformed signal. At 1304, the BS may determine, based on the received signal, that the at least one UE is in a high mobility state and a DRX configuration at least partially based on the high mobility state of the at least one UE. At 1306, the BS may transmit an indication of the DRX configuration to the at least one UE. At 1308, the BS may communicate with the at least one UE based on the DRX configuration.

[0102] In various aspects, the BS may determine that the UE is in the high mobility state based on various measurements of a signal indicating the high mobility state of at least one UE, such as Doppler shift (e.g., > 800 Hz or a certain threshold) and frequent changes in the angle of arrival of the signal. For example, these measurements may include various attributes of the signal or channel monitored by the BS. In various aspects, these measurements may include at least one of Doppler shift, angle change associated with the angle of arrival of these signals, Doppler spread, average delay, delay spread, or the signal quality of these signals. The signal quality may include channel quality indicator, signal-to-noise ratio (SNR), signal-to-interference-plus-noise ratio (SINR), signal-to-noise-plus-distortion ratio (SNDR), received signal strength indicator (RSSI), precoding matrix, etc.

[0103] In certain aspects, the DRX configuration may indicate aspects of the DRX cycle adapted to the high mobility state of the UE. The DRX configuration may indicate the DRX cycle, long DRX cycle start offset, DRX inactivity timer, on-duration timer, short DRX cycle, and / or short DRX cycle timer. For example, the DRX configuration of operation 1300 may include at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the at least one BS and disables the DRX cycle. In certain aspects, the configuration that keeps the UE in the connected state may configure the UE to monitor PDCCH opportunities during a part or the entire off-duration of the DRX cycle.

[0104] In various aspects, the BS may transmit an indication of the DRX configuration via control signaling. For example, an indication of a first DRX configuration may be transmitted via RRC signaling, DCI, or MAC-CE.

[0105] In various aspects, the BS may receive various uplink reference signals at 1302. That is, the beamformed signal may include an uplink reference signal. The uplink reference signal may include at least one of SRS, DMRS, or PT-RS.

[0106] In various aspects, the high mobility state may include various high-speed applications (such as high-speed trains or tunnels). In some aspects, the high mobility state may include the UE moving at a speed of 350 km / h to 650 km / h.

[0107] In some aspects, at 1308, the BS may communicate with the UE via a single carrier frequency. The carrier frequency may be in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz. The single carrier frequency can reduce the inter-carrier interference caused by the large Doppler frequency shift encountered in the high mobility state. The single carrier frequency can improve handovers when the UE moves along a track or in a tunnel.

[0108] Figure 14 Illustrated is a communication device 1400 (e.g., a UE or a BS) that may include various components (e.g., corresponding to apparatus-plus-function components) configured to perform operations for the techniques disclosed herein (such as Figures 10 - 13 the operations illustrated in). The communication device 1400 includes a processing system 1402 coupled to a transceiver 1408 (e.g., a transmitter and / or a receiver). The transceiver 1408 is configured to transmit and receive signals for the communication device 1400 (such as the various signals described herein) via an antenna 1410. The processing system 1402 may be configured to perform processing functions for the communication device 1400, including processing signals received and / or to be transmitted by the communication device 1400.

[0109] The processing system 1402 includes a processor 1404 coupled to a computer-readable medium / memory 1412 via a bus 1406. In some aspects, the computer-readable medium / memory 1412 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1404, cause the processor 1404 to perform Figures 10 - 13 the operations illustrated in or other operations for performing the various techniques for DRX beam management in high-speed applications discussed herein. In some aspects, the computer-readable medium / memory 1412 stores code 1414 for receiving, code 1416 for transmitting, code 1418 for determining, and / or code 1420 for communicating (which may include code 1414 for receiving and / or code 1416 for transmitting). In some aspects, the processor 1404 has circuitry configured to implement the code stored in the computer-readable medium / memory 1412. The processor 1404 includes circuitry 1422 for receiving, circuitry 1424 for transmitting, circuitry 1426 for determining, and / or circuitry 1428 for communicating.

[0110] The techniques described herein can be used in a variety of wireless communication technologies such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. CDMA networks may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. cdma2000 covers the IS-2000, IS-95, and IS-856 standards. TDMA networks may implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks may implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0111] The techniques described herein can be used in the wireless networks and radio technologies mentioned above and other wireless networks and radio technologies. For clarity, while aspects may be described herein using terms typically associated with 3G, 4G, and / or 5G wireless technologies, aspects of the present disclosure may be applied in communication systems based on other generations.

[0112] In 3GPP, the term "cell" may refer to the coverage area of a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In an NR system, the terms "cell" and BS, next-generation Node B (gNB or g Node B), access point (AP), distributed unit (DU), carrier, or transmit receive point (TRP) may be used interchangeably. A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unconstrained access by UEs with a service subscription. A pico cell may cover a relatively small geographic area and may allow unconstrained access by UEs with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow constrained access by UEs associated with that femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). The BS for a macro cell may be referred to as a macro BS. The BS for a pico cell may be referred to as a pico BS. The BS for a femto cell may be referred to as a femto BS or a home BS.

[0113] A UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premise equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or equipment, biometric sensor / device, wearable device (such as a smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired media. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the network, for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0114] Some wireless networks (e.g., LTE) utilize Orthogonal Frequency Division Multiplexing (OFDM) on the downlink and Single Carrier Frequency Division Multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency tones, frequency bins, etc. Each subcarrier can be modulated with data. Generally speaking, the modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the subcarrier spacing can be 15 kHz, and the smallest resource allocation (referred to as a "resource block" (RB)) can be 12 subcarriers (or 180 kHz). Thus, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal Fast Fourier Transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth can also be divided into subbands. For example, a subband can cover 1.08 MHz (e.g., 6 RBs), and for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, there can be 1, 2, 4, 8, or 16 subbands, respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a 1 ms subframe.

[0115] NR can utilize OFDM with CP on both the uplink and downlink and includes support for half-duplex operation using TDD. In NR, a subframe is still 1 ms, but the basic TTI is called a slot. A subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16... slots), which depends on the subcarrier spacing. The NR RB is 12 consecutive frequency subcarriers. NR can support a base subcarrier spacing of 15 kHz, and other subcarrier spacings can be defined relative to the base subcarrier spacing, e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. The symbol and slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing. Beamforming can be supported and the beam direction can be configured dynamically. MIMO transmission with precoding can also be supported. In some examples, the MIMO configuration in the DL can support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. In some examples, multi-layer transmission with up to 2 streams per UE can be supported. Up to 8 serving cells can be used to support the aggregation of multiple cells.

[0116] In some examples, access to an air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all of the devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for the scheduled communication, the subordinate entities utilize the resources allocated by the scheduling entity. A base station is not the only entity that can serve as a scheduling entity. In some examples, a UE may act as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and the other UEs may utilize the resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0117] In some examples, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communication may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Everything (IoE) communication, IoT communication, mission-critical mesh, and / or various other suitable applications. Generally, a sidelink signal may refer to a signal that is conveyed from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., a UE or a BS), even though a scheduling entity may be used for scheduling and / or control purposes. In some examples, sidelink signals may be conveyed using licensed spectrum (different from wireless local area networks, which typically use unlicensed spectrum).

[0118] The various methods disclosed herein include one or more steps or acts for implementing the methods. These method steps and / or acts may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of the steps or acts is specified, the order and / or use of the specific steps and / or acts may be altered without departing from the scope of the claims.

[0119] As used herein, the phrase reciting “at least one of” a list of items refers to any combination of those items, including a single member. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination having multiple identical elements (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c, or any other ordering of a, b, and c).

[0120] As used herein, the term "determine" encompasses a variety of actions. For example, "determine" can include computing, calculating, processing, deriving, researching, looking up (e.g., looking up in a table, database, or other data structure), ascertaining, and the like. Also, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determine" can include parsing, selecting, choosing, establishing, and the like.

[0121] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language of the claims, wherein the recitation of a singular element is not intended to mean "one and only one" (unless specifically so stated) but "one or more". Unless specifically stated otherwise, the term "some / a" means one or more. All structural and functional equivalents known to those of ordinary skill in the art currently or hereafter of the elements of the various aspects described throughout this disclosure are expressly incorporated herein by reference and are intended to be covered by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public, whether or not such disclosure is expressly recited in the claims. No element of a claim should be construed under the provisions of 35 U.S.C. § 112(f) unless the element is expressly recited using the phrase "means for" or, in the case of a method claim, the element is recited using the phrase "step for".

[0122] The various operations of the methods described above can be performed by any suitable means capable of performing the corresponding functions. These means can include various hardware and / or software components and / or modules, including but not limited to circuitry, application specific integrated circuits (ASICs), or processors. In general, where there are operations illustrated in the figures, these operations may have corresponding paired means-plus-function components with similar numbers.

[0123] The various illustrative logical blocks, modules, and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0124] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented with a bus architecture. Depending on the particular application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, machine-readable media, and a bus interface. The bus interface may be used to connect a network adapter etc. to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of user equipment 120 (see Figure 1 ), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits (such as a timing source, peripherals, voltage regulators, power management circuits, etc.) which are well known in the art and will not be described further herein. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry capable of executing software. Depending on the particular application and overall design constraints imposed on the overall system, those of ordinary skill in the art will recognize how best to implement the functionality described with respect to the processing system.

[0125] If implemented in software, each function can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Software should be broadly construed to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media includes both computer storage media and communication media, which includes any medium that facilitates the transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. The computer-readable storage medium may be coupled to the processor such that the processor can read from and write to the storage medium. In an alternative, the storage medium may be integrated into the processor. By way of example, the machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium with instructions stored thereon separate from a wireless node, all of which may be accessed by the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any part thereof may be integrated into the processor, such as may be the case with a cache and / or a general register file. By way of example, examples of the machine-readable medium may include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable medium may be embodied in a computer program product.

[0126] Software modules may include a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. The computer-readable medium may include several software modules. These software modules include instructions that, when executed by an apparatus (such as a processor), cause the processing system to perform various functions. These software modules may include a transmission module and a reception module. Each software module may reside in a single storage device or be distributed across multiple storage devices. By way of example, when a trigger event occurs, the software module may be loaded from a hard drive into RAM. During execution of the software module, the processor may load some instructions into a cache to improve access speed. One or more cache lines may then be loaded into the general register file for execution by the processor. When referring to the functionality of a software module hereinafter, it will be understood that such functionality is implemented by the processor when executing instructions from the software module.

[0127] Similarly, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technology such as infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology such as infrared, radio, and microwave is included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and disc, where disk typically reproduces data magnetically, while disc reproduces data optically with a laser. Thus, in some aspects, a computer-readable medium may include a non-transitory computer-readable medium (e.g., a tangible medium). Additionally, for other aspects, a computer-readable medium may include a transitory computer-readable medium (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.

[0128] Accordingly, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having (and / or encoded thereon) instructions that can be executed by one or more processors to perform the operations described herein, such as instructions for performing the operations described and illustrated in Figures 10 - 13 the foregoing.

[0129] Furthermore, it should be appreciated that modules and / or other suitable means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or a base station where applicable. For example, such devices can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.) such that once the storage device is coupled to or provided to the user terminal and / or base station, the device can obtain the various methods. Additionally, any other suitable technology can be utilized that is adapted to provide the methods and techniques described herein to a device.

[0130] It will be understood that the claims are not limited to the exact configurations and components described above. Various modifications, substitutions, and variations can be made in the layout, operation, and details of the methods and apparatuses described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment UE, comprising: Receiving a beamformed signal from at least one network node; Determining, based on the received signal, that the UE is in a high mobility state and one or more parameters associated with the high mobility state; Transmitting at least one of the one or more parameters to the at least one network node; And Communicating with the at least one network node based on the one or more parameters; Wherein communicating with the at least one network node includes communicating with the network node based on a DRX configuration included in the one or more parameters; And Wherein a DRX cycle of the DRX configuration is adapted to have a specific on-duration aligned with at least one of a Doppler shift and an angular change associated with an angle of arrival AOA of the beamformed signal encountered by the UE.

2. The method according to claim 1, wherein the one or more parameters include at least one of the following: A first indication of one or more measurements of the signal, wherein the measurement indicates the high mobility state of the UE, or A second indication of one or more events associated with the high mobility state of the UE.

3. The method according to claim 2, wherein the measurement includes at least one of a Doppler shift, the angular change associated with the AOA of the beamformed signal, or a signal quality of the signal.

4. The method according to claim 2, wherein the event includes at least one of a high speed event, a Doppler shift event, or an angular change event.

5. The method according to claim 2, wherein the DRX configuration includes at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the at least one network node and disables the DRX cycle.

6. The method according to claim 1, wherein: The DRX configuration includes at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the at least one network node and disables the DRX cycle.

7. The method according to claim 1, further comprising: Receiving an indication of the DRX configuration from the at least one network node.

8. The method according to claim 7, wherein the indication is received via radio resource control signaling, downlink control information, or a media access control MAC control element.

9. The method according to any one of the preceding claims, wherein the high mobility state includes the UE moving at a speed of 350 kilometers per hour km / h to 650 km / h.

10. The method according to any one of claims 1 - 8, wherein communicating with the at least one network node comprises: Communicating with the at least one network node via a single carrier frequency.

11. The method according to claim 10, wherein the carrier frequency is in a frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

12. A method for wireless communication by a network node, comprising: Transmit a beamformed signal to a user equipment UE; Receive from the UE one or more parameters associated with a high mobility state of the UE; Determine a first discontinuous reception DRX configuration at least in part based on the one or more parameters; Transmit an indication of the first DRX configuration to the UE; And Communicate with the UE based on the first DRX configuration; Wherein a DRX cycle of the first DRX configuration is adapted to have a specific on-duration aligned with at least one of a Doppler shift and an angular change associated with an angle of arrival AOA of the beamformed signal encountered by the UE.

13. The method according to claim 12, wherein the first DRX configuration comprises at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the network node and disables the DRX cycle.

14. The method according to claim 12, wherein the indication is transmitted via radio resource control signaling, downlink control information, or a media access control MAC control element.

15. The method according to claim 12, wherein the one or more parameters comprise at least one of the following: A first indication of one or more measurements of a signal received by the UE, wherein the measurements indicate the high mobility state of the UE, A second indication of one or more events associated with the high mobility state of the UE, or A third indication of a second DRX configuration based on the high mobility state of the UE.

16. The method according to claim 15, wherein the measurements comprise at least one of the Doppler shift, the angular change associated with the AOA of the beamformed signal, or the signal quality of the signal.

17. The method according to claim 15, wherein the events comprise at least one of a high-speed event, a Doppler shift event, or an angular change event.

18. The method according to claim 15, wherein the second DRX configuration comprises at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the network node and disables the DRX cycle.

19. The method according to claim 15, wherein the first DRX configuration comprises the second DRX configuration.

20. The method according to claim 15, wherein the first DRX configuration is different from the second DRX configuration.

21. The method according to any one of claims 12 - 20, wherein the high mobility state comprises the UE moving at a speed of 350 kilometers per hour km / h to 650 km / h.

22. The method according to any one of claims 15 - 20, wherein communicating with the UE comprises: Communicate with the UE via a single carrier frequency.

23. The method according to claim 22, wherein the carrier frequency is in a frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

24. A method for a user equipment UE to perform wireless communication, comprising: When the UE is in a high mobility state, transmit a beamformed signal to at least one network node; Receive an indication of a DRX configuration that is at least partially based on the high mobility state of the UE from the at least one network node; And Communicate with the at least one network node based on the DRX configuration; Wherein the DRX cycle of the DRX configuration is adapted to have a specific on-duration aligned with at least one of the Doppler frequency shift and the angular change associated with the angle of arrival AOA of the beamformed signal encountered by the at least one network node.

25. The method according to claim 24, wherein the DRX configuration includes at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the at least one network node and disables the DRX cycle.

26. The method according to claim 24, wherein the indication is received via radio resource control signaling, downlink control information, or a media access control MAC control element.

27. The method according to claim 24, wherein the beamformed signal includes an uplink reference signal.

28. The method according to claim 27, wherein the uplink reference signal includes at least one of a sounding reference signal, a demodulation reference signal, or a phase tracking reference signal.

29. The method according to any one of claims 24-28, wherein the high mobility state includes the UE moving at a speed of 350 kilometers per hour km / h to 650 km / h.

30. The method according to any one of claims 24 - 28, wherein communicating with the at least one network node comprises: Communicate with the at least one network node via a single carrier frequency.

31. The method according to claim 30, wherein the carrier frequency is in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

32. A method for wireless communication by a network node, comprising: Receive a beamformed signal from at least one user equipment UE; Determine that the at least one UE is in a high mobility state and a discontinuous reception DRX configuration that is at least partially based on the high mobility state of the at least one UE based on the received signal; Transmit an indication of the DRX configuration to the at least one UE; And Communicate with the at least one UE based on the DRX configuration; Wherein the DRX cycle of the DRX configuration is adapted to have a specific on-duration aligned with at least one of the Doppler frequency shift and the angular change associated with the angle of arrival AOA of the beamformed signal encountered by the network node.

33. The method according to claim 32, wherein the DRX configuration includes at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the network node and disables the DRX cycle.

34. The method according to claim 32, wherein the indication is transmitted via radio resource control signaling, downlink control information, or a media access control (MAC) control element.

35. The method according to claim 32, wherein the beamformed signal comprises an uplink reference signal.

36. The method according to claim 35, wherein the uplink reference signal comprises at least one of a sounding reference signal, a demodulation reference signal, or a phase tracking reference signal.

37. The method according to any one of claims 32 - 36, wherein the high mobility state comprises the at least one UE moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

38. The method according to any one of claims 32 - 36, wherein communicating with the at least one UE comprises: Communicate with the at least one UE via a single carrier frequency.

39. The method according to claim 38, wherein the carrier frequency is in a frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

40. An apparatus for wireless communication, comprising: a receiver configured to receive a beamformed signal from at least one network node; a processing system configured to determine, based on the received signal, that the apparatus is in a high mobility state and one or more parameters associated with the high mobility state; and a transmitter configured to transmit at least one of the one or more parameters to the at least one network node; wherein the receiver and the transmitter are configured to communicate with the at least one network node based on the one or more parameters; wherein communicating with the at least one network node comprises communicating with the network node based on a discontinuous reception (DRX) configuration included in the one or more parameters; and wherein a DRX cycle of the DRX configuration is adapted to have a specific on - duration aligned with at least one of a Doppler shift and an angular change associated with an angle of arrival (AOA) of the beamformed signal encountered by the apparatus.

41. The apparatus according to claim 40, wherein the one or more parameters comprise at least one of the following: a first indication of one or more measurements of the signal, wherein the measurement indicates the high mobility state of the apparatus, or a second indication of one or more events associated with the high mobility state of the apparatus.

42. The apparatus according to claim 41, wherein the measurement comprises at least one of a Doppler shift, the angular change associated with the AOA of the beamformed signal, or the signal quality of the signal.

43. The apparatus according to claim 41, wherein the event comprises at least one of a high - speed event, a Doppler shift event, or an angular change event.

44. The apparatus according to claim 41, wherein the DRX configuration comprises at least one of the following: a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the apparatus in a connected state with the at least one network node and disables the DRX cycle.

45. The apparatus according to claim 40, wherein: the DRX configuration includes at least one of a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the apparatus in a connected state with the at least one network node and disables the DRX cycle.

46. The apparatus according to claim 40, wherein the receiver is further configured to: receive an indication of the DRX configuration from the at least one network node.

47. The apparatus according to claim 46, wherein the indication is received via radio resource control signaling, downlink control information, or a media access control (MAC) control element.

48. The apparatus according to any one of claims 40 - 47, wherein the high mobility state includes the apparatus moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

49. The apparatus according to any one of claims 40 - 47, wherein communicating with the at least one network node comprises: communicate with the at least one network node via a single carrier frequency.

50. The apparatus according to claim 49, wherein the carrier frequency is in a frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

51. An apparatus for wireless communication, comprising: a transmitter configured to transmit a beamformed signal to a user equipment (UE); a receiver configured to receive one or more parameters associated with a high mobility state of the UE from the UE; a processing system configured to determine a first discontinuous reception (DRX) configuration at least in part based on the one or more parameters; and a transmitter configured to transmit an indication of the first DRX configuration to the UE; wherein the receiver and the transmitter are configured to communicate with the UE based on the first DRX configuration; wherein the DRX cycle of the first DRX configuration is adapted to have a specific on - duration aligned with at least one of a Doppler shift and an angular change associated with an angle of arrival (AOA) of the beamformed signal encountered by the UE.

52. The apparatus according to claim 51, wherein the first DRX configuration includes at least one of the following: a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the apparatus and disables the DRX cycle.

53. The apparatus according to claim 51, wherein the indication is transmitted via radio resource control signaling, downlink control information, or a media access control (MAC) control element.

54. The apparatus according to claim 51, wherein the one or more parameters include at least one of the following: a first indication of one or more measurements of a signal received by the UE, wherein the measurements indicate the high mobility state of the UE, a second indication of one or more events associated with the high mobility state of the UE, or a third indication of a second DRX configuration based on the high mobility state of the UE.

55. The apparatus according to claim 54, wherein the measurement includes at least one of the Doppler shift, the angle change associated with the AOA of the beamformed signal, or the signal quality of the signal.

56. The apparatus according to claim 54, wherein the event includes at least one of a high-speed event, a Doppler shift event, or an angle change event.

57. The apparatus according to claim 54, wherein the second DRX configuration includes at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the UE in a connected state with the apparatus and disables the DRX cycle.

58. The apparatus according to claim 54, wherein the first DRX configuration includes the second DRX configuration.

59. The apparatus according to claim 54, wherein the first DRX configuration is different from the second DRX configuration.

60. The apparatus according to any one of claims 51-59, wherein the high mobility state includes the UE moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

61. The apparatus according to any one of claims 54-59, wherein the receiver and the transmitter are configured to communicate with the UE via a single carrier frequency.

62. The apparatus according to claim 61, wherein the carrier frequency is in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

63. An apparatus for wireless communication, comprising: A transmitter configured to transmit a beamformed signal to at least one network node when the apparatus is in a high mobility state; And A receiver configured to receive an indication of a DRX configuration that is at least partially based on the high mobility state of the apparatus from the at least one network node; Wherein the receiver and the transmitter are configured to communicate with the at least one network node based on the DRX configuration; Wherein the DRX cycle of the DRX configuration is adapted to have a specific on-duration aligned with at least one of the Doppler shift and the angle change associated with the angle of arrival (AOA) of the beamformed signal encountered by the at least one network node.

64. The apparatus according to claim 63, wherein the DRX configuration includes at least one of the following: A configuration for a long DRX cycle, A configuration for a short DRX cycle, A DRX mode, or A configuration that keeps the apparatus in a connected state with the at least one network node and disables the DRX cycle.

65. The apparatus according to claim 63, wherein the receiver is configured to receive the indication via radio resource control signaling, downlink control information, or a media access control (MAC) control element.

66. The apparatus according to claim 63, wherein the beamformed signal includes an uplink reference signal.

67. The apparatus according to claim 66, wherein the uplink reference signal includes at least one of a sounding reference signal, a demodulation reference signal, or a phase tracking reference signal.

68. The apparatus according to any one of claims 63 - 67, wherein the high mobility state includes the apparatus moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

69. The apparatus according to any one of claims 63 - 67, wherein the transmitter and the receiver are configured to communicate with the at least one network node via a single - carrier frequency.

70. The apparatus according to claim 69, wherein the carrier frequency is in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

71. An apparatus for wireless communication, comprising: a receiver configured to receive a beamformed signal from at least one user equipment (UE); a processing system configured to determine, based on the received signal, that the at least one UE is in a high mobility state and at least partially based on a discontinuous reception (DRX) configuration of the high mobility state of the at least one UE; and a transmitter configured to transmit an indication of the DRX configuration to the at least one UE; and wherein the receiver and the transmitter are configured to communicate with the at least one UE based on the DRX configuration; wherein the DRX cycle of the DRX configuration is adapted to have a specific on - duration aligned with at least one of a Doppler shift and an angular change associated with an angle of arrival (AOA) of the beamformed signal encountered by the apparatus.

72. The apparatus according to claim 71, wherein the DRX configuration includes at least one of the following: a configuration for a long DRX cycle, a configuration for a short DRX cycle, a DRX mode, or a configuration that keeps the UE in a connected state with the apparatus and disables the DRX cycle.

73. The apparatus according to claim 71, wherein the transmitter is configured to transmit the indication via radio resource control signaling, downlink control information, or a media access control (MAC) control element.

74. The apparatus according to claim 71, wherein the beamformed signal includes an uplink reference signal.

75. The apparatus according to claim 74, wherein the uplink reference signal includes at least one of a sounding reference signal, a demodulation reference signal, or a phase tracking reference signal.

76. The apparatus according to any one of claims 71 - 75, wherein the high mobility state includes the at least one UE moving at a speed of 350 kilometers per hour (km / h) to 650 km / h.

77. The apparatus according to any one of claims 71 - 75, wherein communicating with the at least one UE comprises: Communicate with the at least one UE via a single - carrier frequency.

78. The apparatus according to claim 77, wherein the carrier frequency is in the frequency range of 400 MHz to 7200 MHz or 24 GHz to 53 GHz.

79. An apparatus for wireless communication, comprising means for performing the operations of the method according to any one of claims 1-11.

80. An apparatus for wireless communication, comprising means for performing the operations of the method according to any one of claims 12-23.

81. An apparatus for wireless communication, comprising means for performing the operations of the method according to any one of claims 24-31.

82. An apparatus for wireless communication, comprising means for performing the operations of the method according to any one of claims 32-39.

83. A computer-readable medium having stored thereon instructions for performing the operations of the method according to any one of claims 1-11.

84. A computer-readable medium having stored thereon instructions for performing the operations of the method according to any one of claims 12-23.

85. A computer-readable medium having stored thereon instructions for performing the operations of the method according to any one of claims 24-31.

86. A computer-readable medium having stored thereon instructions for performing the operations of the method according to any one of claims 32-39.

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