WO2019028825A1

WO2019028825A1 - Techniques and apparatuses for wakeup signaling in a multi-beam system

Info

Publication number: WO2019028825A1
Application number: PCT/CN2017/097057
Authority: WO
Inventors: Sumeeth Nagaraja; Peter Ang; Linhai He; Peng Cheng; Tao Luo; Muhammad Nazmul ISLAM; Jianghong LUO
Original assignee: Qualcomm Incorporated
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2019-02-14

Abstract

In some cases, a user equipment (UE) may communicate with a base station using one or more beams, such as in a millimeter wave system. This increases the complexity associated with transmission and reception of advanced grant indications (AGIs) because there are multiple possible beams via which an AGI could be transmitted and/or received, channel conditions of different beams may change over time (e.g., due to UE mobility, beam load, and/or the like), the UE and/or base station may have different capabilities with respect to communications using multiple beams, and/or the like. Some techniques and apparatuses described herein assist with transmission and reception of AGIs in multi-beam wireless communication systems. Some techniques and apparatuses described herein increase a likelihood of successful communication of AGIs, which consequently conserves UE battery power.

Description

TECHNIQUES AND APPARATUSES FOR WAKEUP SIGNALING IN A MULTI-BEAM SYSTEM

BACKGROUND Field

Aspects of the present disclosure generally relate to wireless communication， and more particularly to techniques and apparatuses for wakeup signaling in a multi-beam system.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony， video， data， messaging， and broadcasts. Typical 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， and/or the like) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems， time division multiple access (TDMA) systems， frequency-division multiple access (FDMA) systems， orthogonal frequency-division multiple access (OFDMA) systems， single-carrier frequency-division multiple access (SC-FDMA) systems， time division synchronous code division multiple access (TD-SCDMA) systems， and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .

A wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) . A UE may communicate with a BS via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE， and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein， a BS may be referred to as a Node B， a gNB， an access point (AP) ， a radio head， a transmit receive point (TRP) ， a new radio (NR) BS， a 5G Node B， and/or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless communication devices to communicate on a municipal， national， regional， and even global level. New radio (NR) ， which may also be referred to as 5G， is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) . NR is designed to better support mobile broadband Internet access by improving spectral efficiency， lowering costs， improving services， making use of new spectrum， and better integrating with other open standards using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) ， using CP-OFDM and/or SC-FDM (e.g.， also known as discrete Fourier transform spread ODFM (DFT-s-OFDM) ) on the uplink (UL) ， as well as supporting beamforming， multiple-input multiple-output (MIMO) antenna technology， and carrier aggregation. However， as the demand for mobile broadband access continues to increase， there exists a need for further improvements in LTE and NR technologies. Preferably， these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

When in an idle mode or a connected mode discontinuous reception (CDRX) mode， a UE may enter a low power state to conserve battery power， and may periodically wake up to monitor a control channel (e.g.， the PDCCH and/or the like) for signals relating to the UE， such as pages. However， such control channel monitoring may be resource intensive and may consume battery power because the control channel uses complex signals that include a large amount of information. For example， the UE may wake up， search for signals on the control channel， decode the signals if the signals are found， and determine whether the decoded signals are relevant to the UE. If the decoded control channel signals are not relevant to the UE， then the battery power used to search for， receive， and decode the control channel signals is wasted. To conserve battery power， a simple (e.g.， one bit) advanced grant indication (e.g.， a wakeup signal， a go-to-sleep signal， and/or the like) may be used to indicate to the UE whether an upcoming control channel signal location includes information relevant to the UE. In this way， the UE wakes up to perform complex control channel signal processing only when the control channel includes signals relevant to the UE， thereby conserving battery power and resources of the UE.

SUMMARY

In some cases， the UE may communicate with a base station using one or more beams (e.g.， antenna beams， directional beams， and/or the like) ， such as in a millimeter wave system. This increases the complexity associated with transmission and reception of advanced grant indications (AGIs) because there are multiple possible beams via which an AGI could be transmitted and/or received， channel conditions of different beams may change over time (e.g.， due to UE mobility， beam load， and/or the like) ， the UE and/or base station may have different capabilities with respect to communications using multiple beams， and/or the like. Some techniques and apparatuses described herein assist with transmission and reception of AGIs in multi-beam wireless communication systems. Some techniques and apparatuses described herein increase a likelihood of successful communication of AGIs， which consequently conserves UE battery power.

In an aspect of the disclosure， a method， a user equipment， a base station， an apparatus， and a computer program product are provided.

In some aspects， the method may be performed by a user equipment (UE) ， and may include configuring one or more beams for reception of an advanced grant indication (AGI) ； monitoring the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and waking up or sleeping during the DRX on duration based at least in part on whether the AGI is received.

In some aspects， the method may be performed by a base station， and may include configuring one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； determining whether a communication is to be transmitted to the UE during the DRX on duration； and transmitting or skipping transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.

In some aspects， the UE may include a memory and at least one processor coupled to the memory. The memory and the at least one processor may be configured to configure one or more beams for reception of an advanced grant indication (AGI) ； monitor the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and wake up or sleep during the DRX on duration based at least in part on whether the AGI is received.

In some aspects， the base station may include a memory and at least one processor coupled to the memory. The memory and the at least one processor may be configured to configure one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； determine whether a communication is to be transmitted to the UE during the DRX on duration； and transmit or skip transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.

In some aspects， the apparatus may include means for configuring one or more beams for reception of an advanced grant indication (AGI) ； means for monitoring the one or more beams for the AGI， wherein the AGI indicates whether the apparatus is to wake up or sleep during a discontinuous reception (DRX) on duration； and means for waking up or sleeping during the DRX on duration based at least in part on whether the AGI is received.

In some aspects， the apparatus may include means for configuring one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； means for determining whether a communication is to be transmitted to the UE during the DRX on duration； and means for transmitting or skipping transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.

In some aspects， the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. The one or more instructions， when executed by one or more processors of a UE， may cause the one or more processors to configure one or more beams for reception of an advanced grant indication (AGI) ； monitor the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and wake up or sleep during the DRX on duration based at least in part on whether the AGI is received.

In some aspects， the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. The one or more instructions， when executed by one or more processors of a base station， may cause the one or more processors to configure one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； determine whether a communication is to be transmitted to the UE during the DRX on duration； and transmit or skip transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.

Aspects generally include a method， user equipment， base station， apparatus， system， computer program product， non-transitory computer-readable medium， and processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein， both their organization and method of operation， together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description， and not as a definition of the limits of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is diagram illustrating an example of a wireless communication network.

FIG. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network.

FIG. 3 is a diagram illustrating an example of a frame structure in a wireless communication network.

FIG. 4 is a diagram illustrating two example subframe formats with the normal cyclic prefix.

FIGs. 5-7 are diagrams illustrating examples of wakeup signaling in a multi-beam system.

FIG. 8 is a flow chart of a method of wireless communication.

FIG. 9 is a flow chart of another method of wireless communication.

FIG. 10 is a conceptual data flow diagram illustrating the data flow between different modules/means/components in an example apparatus.

FIG. 11 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

FIG. 12 is a conceptual data flow diagram illustrating the data flow between different modules/means/components in another example apparatus.

FIG. 13 is a diagram illustrating an example of another hardware implementation for an apparatus employing a processing system.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purposes of providing a thorough understanding of various concepts. However， it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances， well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks， modules， components， circuits， steps， processes， algorithms， and/or the like (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware， computer software， or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

By way of example， an element， or any portion of an element， or any combination of elements may be implemented with a “processing system” that includes one or more processors. Examples of processors include microprocessors， microcontrollers， digital signal processors (DSPs) ， field programmable gate arrays (FPGAs) ， programmable logic devices (PLDs) ， state machines， gated logic， discrete hardware circuits， and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions， instruction sets， code， code segments， program code， programs， subprograms， software modules， applications， software applications， software packages， routines， subroutines， objects， executables， threads of execution， procedures， functions， and/or the like， whether referred to as software， firmware， middleware， microcode， hardware description language， or otherwise.

Accordingly， in one or more example embodiments， the functions described may be implemented in hardware， software， firmware， or any combination thereof. If implemented in software， the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example， and not limitation， such computer-readable media can comprise a random-access memory (RAM) ， a read-only memory (ROM) ， an electrically erasable programmable ROM (EEPROM) ， compact disk ROM (CD-ROM) or other optical disk storage， magnetic disk storage or other magnetic storage devices， combinations of the aforementioned types of computer-readable media， or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

It is noted that while aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies， aspects of the present disclosure can be applied in other generation-based communication systems， such as 5G and later， including NR technologies.

FIG. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be practiced. The network 100 may be an LTE network or some other wireless network， such as a 5G or NR network. Wireless network 100 may include a number of BSs 110 (shown as BS 110a， BS 110b， BS 110c， and BS 110d) and other network entities. A BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station， a NR BS， a Node B， a gNB， a 5G NB， an access point， a transmit receive point (TRP) ， and/or the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP， the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area， depending on the context in which the term is used. In some aspects， wireless network 100 may include a multi-beam system.

A BS may provide communication coverage for a macro cell， a pico cell， a femto cell， and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g.， several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g.， a home) and may allow restricted access by UEs having association with the femto cell (e.g.， UEs in a closed subscriber group (CSG) ) . A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in FIG. 1， a BS 110a may be a macro BS for a macro cell 102a， a BS 110b may be a pico BS for a pico cell 102b， and a BS 110c may be a femto BS for a femto cell 102c. A BS may support one or multiple (e.g.， three) cells. The terms “eNB” ， “base station” ， “NR BS” ， “gNB” ， “TRP” ， “AP” ， “node B” ， “5G NB” ， and “cell” may be used interchangeably herein.

In some examples， a cell may not necessarily be stationary， and the geographic area of the cell may move according to the location of a mobile BS. In some examples， the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the access network 100 through various types of backhaul interfaces such as a direct physical connection， a virtual network， and/or the like using any suitable transport network.

Wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g.， a BS or a UE) and send a transmission of the data to a downstream station (e.g.， a UE or a BS) . A relay station may also be a UE that can relay transmissions for other UEs. In the example shown in FIG. 1， a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS， a relay base station， a relay， and/or the like.

Wireless network 100 may be a heterogeneous network that includes BSs of different types， e.g.， macro BSs， pico BSs， femto BSs， relay BSs， and/or the like. These different types of BSs may have different transmit power levels， different coverage areas， and different impact on interference in wireless network 100. For example， macro BSs may have a high transmit power level (e.g.， 5 to 40 Watts) whereas pico BSs， femto BSs， and relay BSs may have lower transmit power levels (e.g.， 0.1 to 2 Watts) .

A network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs. Network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with one another， e.g.， directly or indirectly via a wireless or wireline backhaul.

UEs 120 (e.g.， 120a， 120b， 120c) may be dispersed throughout wireless network 100， and each UE may be stationary or mobile. A UE may also be referred to as an access terminal， a terminal， a mobile station， a subscriber unit， a station， etc. A UE may be a cellular phone (e.g.， a smart phone) ， a personal digital assistant (PDA) ， a wireless modem， a wireless communication device， a handheld device， a laptop computer， a cordless phone， a wireless local loop (WLL) station， a tablet， a camera， a gaming device， a netbook， a smartbook， an ultrabook， medical device or equipment， biometric sensors/devices， wearable devices (smart watches， smart clothing， smart glasses， smart wrist bands， smart jewelry (e.g.， smart ring， smart bracelet) ) ， an entertainment device (e.g.， a music or video device， or a satellite radio) ， a vehicular component or sensor， smart meters/sensors， industrial manufacturing equipment， a global positioning system device， or any other suitable device that is configured to communicate via a wireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include， for example， robots， drones， remote devices， such as sensors， meters， monitors， location tags， etc.， that may communicate with a base station， another device (e.g.， remote device) ， or some other entity. A wireless node may provide， for example， connectivity for or to a network (e.g.， a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices， and/or may be implemented as may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE) . UE 120 may be included inside a housing that houses components of UE 120， such as processor components， memory components， and/or the like. In some aspects， BS 110 and UE 120 may communicate using multiple antenna beams.

In general， any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology， an air interface， and/or the like. A frequency may also be referred to as a carrier， a frequency channel， and/or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases， NR or 5G RAT networks may be deployed.

In some examples， access to the air interface may be scheduled， wherein a scheduling entity (e.g.， a base station) allocates resources for communication among some or all devices and equipment within the scheduling entity’s service area or cell. Within the present disclosure， as discussed further below， the scheduling entity may be responsible for scheduling， assigning， reconfiguring， and releasing resources for one or more subordinate entities. That is， for scheduled communication， subordinate entities utilize resources allocated by the scheduling entity.

Base stations are not the only entities that may function as a scheduling entity. That is， in some examples， a UE may function as a scheduling entity， scheduling resources for one or more subordinate entities (e.g.， one or more other UEs) . In this example， the UE is functioning as a scheduling entity， and other UEs utilize resources scheduled by the UE for wireless communication. A UE may function as a scheduling entity in a peer-to-peer (P2P) network， and/or in a mesh network. In a mesh network example， UEs may optionally communicate directly with one another in addition to communicating with the scheduling entity.

Thus， in a wireless communication network with a scheduled access to time-frequency resources and having a cellular configuration， a P2P configuration， and a mesh configuration， a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.

As indicated above， FIG. 1 is provided merely as an example. Other examples are possible and may differ from what was described with regard to FIG. 1.

FIG. 2 shows a block diagram 200 of a design of base station 110 and UE 120， which may be one of the base stations and one of the UEs in FIG. 1. Base station 110 may be equipped with T antennas 234a through 234t， and UE 120 may be equipped with R antennas 252a through 252r， where in general T ≥ 1 and R ≥ 1.

At base station 110， a transmit processor 220 may receive data from a data source 212 for one or more UEs， select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE，process (e.g.， encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE， and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g.， for semi-static resource partitioning information (SRPI) ， and/or the like) and control information (e.g.， CQI requests， grants， upper layer signaling， and/or the like) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g.， the CRS) and synchronization signals (e.g.， the primary synchronization signal (PSS) and secondary synchronization signal (SSS)) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g.， precoding) on the data symbols， the control symbols， the overhead symbols， and/or the reference symbols， if applicable， and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g.， for OFDM and/or the like) to obtain an output sample stream. Each modulator 232 may further process (e.g.， convert to analog， amplify， filter， and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t， respectively. According to certain aspects described in more detail below， the synchronization signals can be generated with location encoding to convey additional information.

At UE 120， antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r， respectively. Each demodulator 254 may condition (e.g.， filter， amplify， downconvert， and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g.， for OFDM and/or the like) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r， perform MIMO detection on the received symbols if applicable， and provide detected symbols. A receive (RX) processor 258 may process (e.g.， demodulate and decode) the detected symbols， provide decoded data for UE 120 to a data sink 260， and provide decoded control information and system information to a controller/processor 280. A channel processor may determine RSRP， RSSI， RSRQ， CQI， and/or the like.

On the uplink， at UE 120， a transmit processor 264 may receive and process data from a data source 262 and control information (e.g.， for reports comprising RSRP， RSSI， RSRQ， CQI， and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable， further processed by modulators 254a through 254r (e.g.， for DFT-s-OFDM， CP-OFDM， and/or the like) ， and transmitted to base station 110. At base station 110， the uplink signals from UE 120 and other UEs may be received by antennas 234， processed by demodulators 232， detected by a MIMO detector 236 if applicable， and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240. Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244. Network controller 130 may include communication unit 294， controller/processor 290， and memory 292.

Controllers/

processors

240 and 280 and/or any other component (s) in FIG. 2 may direct the operation at base station 110 and UE 120， respectively， to perform wakeup signaling in a multi-beam system. For example， controller/processor 240 and/or other processors and modules at base station 110， may perform or direct operations of UE 120 to perform wakeup signaling in a multi-beam system. In some aspects， controller/processor 280 and/or other controllers/processors and modules at UE 120 may perform or direct operations of， for example， method 800 of FIG. 8 and/or other processes as described herein. Additionally， or alternatively， controller/processor 240 and/or other controllers/processors and modules at base station 110 may perform or direct operations of， for example， method 900 of FIG. 9 and/or other processes as described herein. In some aspects， one or more of the components shown in FIG. 2 may be employed to perform example method 800 of FIG. 8， method 900 of FIG. 9， and/or other processes for the techniques described herein.

Memories

242 and 282 may store data and program codes for base station 110 and UE 120， respectively. A scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.

As indicated above， FIG. 2 is provided merely as an example. Other examples are possible and may differ from what was described with regard to FIG. 2.

FIG. 3 shows an example frame structure 300 for FDD in a telecommunications system (e.g.， LTE) . The transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames. Each radio frame may have a predetermined duration (e.g.， 10 milliseconds (ms) ) and may be partitioned into 10 subframes with indices of 0 through 9. Each subframe may include two slots. Each radio frame may thus include 20 slots with indices of 0 through 19. Each slot may include L symbol periods， e.g.， seven symbol periods for a normal cyclic prefix (as shown in FIG. 3) or six symbol periods for an extended cyclic prefix. The 2L symbol periods in each subframe may be assigned indices of 0 through 2L-1.

While some techniques are described herein in connection with frames， subframes， slots， and/or the like， these techniques may equally apply to other types of wireless communication structures， which may be referred to using terms other than “frame， ” “subframe， ” “slot， ” and/or the like in 5G NR. In some aspects， a wireless communication structure may refer to a periodic time-bounded communication unit defined by a wireless communication standard and/or protocol.

In certain telecommunications (e.g.， LTE) ， a BS may transmit a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) on the downlink in the center of the system bandwidth for each cell supported by the BS. The PSS and SSS may be transmitted in

symbol periods

6 and 5， respectively， in

subframes

0 and 5 of each radio frame with the normal cyclic prefix， as shown in FIG. 3. The PSS and SSS may be used by UEs for cell search and acquisition. The BS may transmit a cell-specific reference signal (CRS) across the system bandwidth for each cell supported by the BS. The CRS may be transmitted in certain symbol periods of each subframe and may be used by the UEs to perform channel estimation， channel quality measurement， and/or other functions. The BS may also transmit a physical broadcast channel (PBCH) in symbol periods 0 to 3 in slot 1 of certain radio frames. The PBCH may carry some system information. The BS may transmit other system information such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain subframes. The BS may transmit control information/data， such as an advanced grant indication (AGI) ， on a physical downlink control channel (PDCCH) in the first B symbol periods of a subframe， where B may be configurable for each subframe. The BS may transmit traffic data and/or other data on the PDSCH in the remaining symbol periods of each subframe.

In other systems (e.g.， such NR or 5G systems) ， a Node B may transmit these or other signals in these locations or in different locations of the subframe.

As indicated above， FIG. 3 is provided merely as an example. Other examples are possible and may differ from what was described with regard to FIG. 3.

FIG. 4 shows two example subframe formats 410 and 420 with the normal cyclic prefix. The available time frequency resources may be partitioned into resource blocks. Each resource block may cover 12 subcarriers in one slot and may include a number of resource elements. Each resource element may cover one subcarrier in one symbol period and may be used to send one modulation symbol， which may be a real or complex value.

Subframe format 410 may be used for two antennas. A CRS may be transmitted from

antennas

0 and 1 in

symbol periods

0， 4， 7 and 11. A reference signal is a signal that is known a priori by a transmitter and a receiver and may also be referred to as a pilot signal. A CRS is a reference signal that is specific for a cell， e.g.， generated based at least in part on a cell identity (ID) . In FIG. 4， for a given resource element with label Ra， a modulation symbol may be transmitted on that resource element from antenna a， and no modulation symbols may be transmitted on that resource element from other antennas. Subframe format 420 may be used with four antennas. A CRS may be transmitted from

antennas

0 and 1 in

symbol periods

0， 4， 7 and 11 and from

antennas

2 and 3 in

symbol periods

1 and 8. For both

subframe formats

410 and 420， a CRS may be transmitted on evenly spaced subcarriers， which may be determined based at least in part on cell ID. CRSs may be transmitted on the same or different subcarriers， depending on their cell IDs. For both

subframe formats

410 and 420， resource elements not used for the CRS may be used to transmit data (e.g.， traffic data， control data， and/or other data) .

The PSS， SSS， CRS and PBCH in LTE are described in 3GPP TS 36.211， entitled ″Evolved Universal Terrestrial Radio Access (E-UTRA) ； Physical Channels and Modulation， ″ which is publicly available.

An interlace structure may be used for each of the downlink and uplink for FDD in certain telecommunications systems (e.g.， LTE) . For example， Q interlaces with indices of 0 through Q -1 may be defined， where Q may be equal to 4， 6， 8， 10， or some other value. Each interlace may include subframes that are spaced apart by Q frames. In particular， interlace q may include subframes q， q + Q， q + 2Q， and/or the like， where q ∈ {0， ...， Q-1} .

The wireless network may support hybrid automatic retransmission request (HARQ) for data transmission on the downlink and uplink. For HARQ， a transmitter (e.g.， a BS) may send one or more transmissions of a packet until the packet is decoded correctly by a receiver (e.g.， a UE) or some other termination condition is encountered. For synchronous HARQ， all transmissions of the packet may be sent in subframes of a single interlace. For asynchronous HARQ， each transmission of the packet may be sent in any subframe.

A UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength， received signal quality， path loss， and/or the like. Received signal quality may be quantified by a signal-to-noise-and-interference ratio (SINR) ， or a reference signal received quality (RSRQ) ， or some other metric.

While aspects of the examples described herein may be associated with LTE technologies， aspects of the present disclosure may be applicable with other wireless communication systems， such as NR or 5G technologies.

New radio (NR) may refer to radios configured to operate according to a new air interface (e.g.， other than Orthogonal Frequency Divisional Multiple Access (OFDMA) -based air interfaces) or fixed transport layer (e.g.， other than Internet Protocol (IP) ) . In aspects， NR may utilize OFDM with a CP (herein referred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink， may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. In aspects， NR may， for example， utilize OFDM with a CP (herein referred to as CP-OFDM) and/or discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) on the uplink， may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g.， 80 megahertz (MHz) and beyond) ， millimeter wave (mmW) targeting high carrier frequency (e.g.， 60 gigahertz (GHz) ) ， massive MTC (mMTC) targeting non-backward compatible MTC techniques， and/or mission critical targeting ultra reliable low latency communications (URLLC) service.

A single component carrier bandwidth of 100 MHZ may be supported. NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 75 kilohertz (kHz) over a 0.1 ms duration. Each radio frame may include 50 subframes with a length of 10 ms. Consequently， each subframe may have a length of 0.2 ms. Each subframe may indicate a link direction (e.g.， DL or UL) for data transmission and the link direction for each subframe may be dynamically switched. Each subframe may include DL/UL data as well as DL/UL control data.

Beamforming may be supported and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells. Alternatively， NR may support a different air interface， other than an OFDM-based interface. NR networks may include entities such central units or distributed units. In some aspects， NR may utilize multiple beams for communication between devices.

The RAN may include a central unit (CU) and distributed units (DUs) . A NR BS (e.g.， gNB， 5G Node B， Node B， transmit receive point (TRP) ， access point (AP)) may correspond to one or multiple BSs. NR cells can be configured as access cells (ACells) or data only cells (DCells) . For example， the RAN (e.g.， a central unit or distributed unit) can configure the cells. DCells may be cells used for carrier aggregation or dual connectivity， but not used for initial access， cell selection/reselection， or handover. In some aspects， DCells may not transmit synchronization signals. In some aspects， DCells may transmit synchronization signals. NR BSs may transmit downlink signals to UEs indicating the cell type. Based at least in part on the cell type indication， the UE may communicate with the NR BS. For example， the UE may determine NR BSs to consider for cell selection， access， handover， and/or measurement based at least in part on the indicated cell type.

As indicated above， FIG. 4 is provided merely as an example. Other examples are possible and may differ from what was described with regard to FIG. 4.

FIG. 5 is a diagram illustrating an example 500 of wakeup signaling in a multi-beam system. As shown in FIG. 5， a UE 505 may communicate with a base station 510 in a system that uses multiple beams for wireless communication. In some aspects， the UE 505 may correspond to one or more UEs described elsewhere herein， such as the UE 120 and/or the like. Additionally， or alternatively， the base station 510 may correspond to one or more base stations described elsewhere herein， such as the base station 110 and/or the like. FIG. 5 shows an example where the UE 505 wakes up to receive a communication in a DRX on duration based at least in part on an AGI configured in a multiple beam system.

At 515， the UE 505 and the base station 510 may configure one or more beams for transmission and/or reception of an advanced grant indication (AGI) . In some aspects， the UE 505 and/or the base station 510 may measure and/or report channel conditions associated with multiple beams， and may select one or more beams to be configured for AGIs based at least in part on the measuring and/or reporting. For example， the UE 505 and/or the base station 510 may use one or more reference signals (e.g.， a sounding reference signal (SRS) ， a demodulation reference signal (DMRS) ， a channel state information-reference signal (CSI-RS) ， and/or the like) to determine channel conditions for multiple beams， and may select one or more beams associated with the best channel conditions. The configuration of the one or more beams may be performed during a beam management (BM) period 520， as shown. In some aspects， configuration of the one or more beams may be referred to as a beam management procedure.

In some aspects， the one or more configured beams includes a subset of a full set of beams associated with the UE 505 (e.g.， capable of being used by the UE 505) . In some aspects， the one or more configured beams includes all beams in the full set of beams associated with the UE 505. When a subset of beams are used， network resources may be conserved. When the full set of beams are used， the likelihood of the UE 505 missing an AGI is reduced. In some aspects， the subset of beams may be used for communications and/or UEs that are not latency sensitive， and the full set of beams may be used for communications and/or UEs that are latency sensitive (e.g.， based at least in part on one or more latency thresholds) .

In some aspects， an AGI may include an indication of whether the UE 505 is to wake up or sleep during a discontinuous reception (DRX) on duration. For example， the AGI may include a wakeup signal (WUS) ， a go-to-sleep signal (GSS) ， and/or the like. In some aspects， if the AGI is a wakeup signal， then presence of the wakeup signal may indicate that the UE 505 is to wake up during the DRX on duration. Additionally， or alternatively， if the AGI is a wakeup signal， then absence of the wakeup signal may indicate that the UE 505 is to sleep during the DRX on duration. In some aspects， if the AGI is a go-to-sleep signal， then presence of the go-to-sleep signal may indicate that the UE 505 is to sleep during the DRX on duration. Additionally， or alternatively， if the AGI is a go-to-sleep signal， then absence of the go-to-sleep signal may indicate that the UE 505 is to wake up during the DRX on duration. In some aspects， the type of AGI and/or the use of AGIs may be configured， enabled， and/or disabled on a per-UE basis. In some aspects， the type of AGI and/or the use of AGIs may be configured， enabled， and/or disabled on a per-UE group basis (e.g.， a cell basis， a UE category basis， using a common control channel， and/or the like) .

In some aspects， the AGI may be a signal in the PDCCH and associated DMRS. For example， the DMRS may be a UE-specific sequence and the PDCCH may be used to identify a cyclic redundancy check (CRC) pass. In this case， a UE-specific scrambling identifier may be used to identify information in the PDCCH， such as a radio network temporary identifier (RNTI) ， a cell RNTI (CRNTI) ， and/or the like. PDCCH decoding may be optional. In some aspects， the AGI may be a signal in a common PDCCH， which may be shared by multiple UEs. In this case， the PDCCH format (e.g.， a DCI format) may be format 3， format 3A， and/or the like. In some aspects， the AGI may be a signal in a UE-specific PDCCH.

At 525， the base station 510 may determine whether a communication (e.g.， a control channel communication， a data channel communication， and/or the like) is to be transmitted to the UE 505 during the DRX on duration. In example 500， the base station 510 determines that a communication is to be transmitted to the UE 505 during the DRX on duration.

At 530， the base station 510 may transmit the AGI or skip transmission of the AGI on the one or more beams based at least in part on whether the communication is to be transmitted to the UE 505 during the DRX on duration. In example 500， the base station 510 transmits the AGI on at least one of the one or more configured beams based at least in part on determining that the communication is to be transmitted to the UE 505 during the DRX on duration. In example 500， the AGI is a wakeup signal， and the wakeup signal is transmitted based at least in part on determining that the communication is to be transmitted to the UE 505 during the DRX on duration. In some aspects， the AGI is a go-to-sleep signal， and transmission of the go-to-sleep signal is skipped based at least in part on determining that the communication is to be transmitted to the UE 505 during the DRX on duration.

As shown， the base station 510 may transmit the AGI， and the UE 505 may receive the AGI during an AGI period 535. In some aspects， the AGI period 535 may follow the beam management period 520， and/or may precede the DRX on duration.

At 540， the UE 505 may monitor the one or more configured beams for the AGI. In example 500， the UE 505 may receive the AGI transmitted by the base station 510. In some aspects， the base station 510 may transmit the AGI and/or the UE 505 may receive the AGI on all of the one or more configured beams. In some aspects， the base station 510 may transmit the AGI and/or the UE 505 may receive the AGI on a single beam of the one or more configured beams. For example， the AGI may be transmitted and/or received on a single active beam to be used for a communication during the DRX on duration. In some aspects， the AGI may be transmitted on multiple active beams. In some aspects， the base station 510 may transmit the AGI and/or the UE 505 may receive the AGI according to a configured sequence for the one or more beams. For example， the base station 510 may transmit the AGI and/or the UE 505 may monitor for the AGI on a first beam during a first AGI period， the base station 510 may transmit the AGI and/or the UE 505 may monitor for the AGI on a second beam during a second AGI period， and/or the like. The sequence may indicate， for example， a single beam to be monitored during an AGI period or multiple beams to be monitored during an AGI period. The set of monitored beams may be different for different AGI periods.

At 545， the UE 505 may wake up or sleep during the DRX on duration based at least in part on whether the AGI is received. In example 500， the UE 505 wakes up to receive a communication during the DRX on duration based at least in part on receiving the AGI. For example， the AGI may be a wakeup signal， and the UE 505 may wake up to receive the communication during the DRX on duration based at least in part on receiving the wakeup signal during the AGI period 535. However， in some aspects， the AGI may be a go-to-sleep signal， and the UE 505 may wake up to receive the communication during the DRX on duration when the go-to-sleep signal is not received during the AGI period 535. In this way， a UE 505 in a multiple beam system may conserve battery power by waking up during a DRX on duration only when there is a communication for the UE 505 during the DRX on duration， and sleeping during the DRX on duration when there are no communications for the UE 505 during the DRX on duration.

In some aspects， the UE 505 and/or the base station 510 may periodically perform a beam management procedure to configure the one or more beams to be used for AGI and/or other communications. In some aspects， a periodicity of the beam management procedure may be based at least in part on a periodicity of AGI communications， DRX on durations， and/or the like. For example， the beam management procedure may be performed before or after a configured number of AGI periods 535， such as before each AGI period 535 in which the UE 505 monitors for the AGI， may be performed before every other AGI period 535， may be performed before every third AGI period 535， and/or the like. Similarly， the beam management procedure may be performed before or after a configured number of DRX cycles.

In some aspects， a beam configuration may be used for multiple AGI periods 535 and/or DRX cycles， as described in more detail below in connection with FIG. 7. Additionally， or alternatively， a beam management procedure to select a set of active beams (e.g.， one or more active beams) ， for communications during the DRX on duration， may be triggered based at least in part on a beam change detected during the AGI period 535， as described in more detail below in connection with FIG. 7.

As indicated above， FIG. 5 is provided as an example. Other examples are possible and may differ from what was described with respect to FIG. 5.

FIG. 6 is a diagram illustrating another example 600 of wakeup signaling in a multi-beam system. As shown in FIG. 6， a UE 605 may communicate with a base station 610 in a system that uses multiple beams for wireless communication. In some aspects， the UE 605 may correspond to one or more UEs described elsewhere herein， such as the UE 120， the UE 505， and/or the like. Additionally， or alternatively， the base station 610 may correspond to one or more base stations described elsewhere herein， such as the base station 110， the base station 510， and/or the like. FIG. 6 shows an example where the UE 605 sleeps during a DRX on duration based at least in part on an AGI configured in a multiple beam system.

At 615， the UE 605 and the base station 610 may configure one or more beams for transmission and/or reception of an AGI， as described in more detail above in connection with FIG. 5. The configuration of the one or more beams may be performed during a beam management (BM) period 620， and may be referred to as a beam management procedure.

At 625， the base station 610 may determine whether a communication is to be transmitted to the UE 605 during the DRX on duration. In example 600， the base station 610 determines that a communication is not to be transmitted to the UE 605 during the DRX on duration.

At 630， the base station 610 may transmit the AGI or skip transmission of the AGI on the one or more beams based at least in part on whether the communication is to be transmitted to the UE 605 during the DRX on duration. In example 600， the base station 610 skips transmission of the AGI on at least one of the one or more configured beams based at least in part on determining that the communication is not to be transmitted to the UE 605 during the DRX on duration. In example 600， the AGI is a wakeup signal， and transmission of the wakeup signal is skipped based at least in part on determining that the communication is not to be transmitted to the UE 605 during the DRX on duration. In some aspects， the AGI is a go-to-sleep signal， and the go-to-sleep signal is transmitted based at least in part on determining that the communication is not to be transmitted to the UE 605 during the DRX on duration.

As shown， the base station 610 may skip transmission of the AGI， and the UE 605 may monitor for the AGI during an AGI period 635. In some aspects， the AGI period 635 may follow the beam management period 620， and/or may precede the DRX on duration.

At 640， the UE 605 may monitor the one or more configured beams for the AGI. In example 600， the UE 605 may not receive the AGI because the AGI was not transmitted by the base station 610. In some aspects， the UE 605 may monitor for the AGI on all of the one or more configured beams. In some aspects， the UE 605 may monitor for the AGI on a single beam of the one or more configured beams. For example， the UE 605 may monitor for the AGI on a single active beam. In some aspects， the UE 605 may monitor for the AGI one multiple active beams. In some aspects， the UE 605 may monitor for the AGI according to a configured sequence associated with the one or more beams， as described above in connection with FIG. 5.

At 645， the UE 605 may wake up or sleep during the DRX on duration based at least in part on whether the AGI is received. In example 600， the UE 605 sleeps during the DRX on duration based at least in part on failing to receive the AGI. For example， the AGI may be a wakeup signal， and the UE 605 may sleep during the DRX on duration based at least in part on failing to receive the wakeup signal during the AGI period 635. However， in some aspects， the AGI may be a go-to-sleep signal， and the UE 605 may sleep during the DRX on duration when the go-to-sleep signal is received during the AGI period 635. In this way， a UE 605 in a multiple beam system may conserve battery power by only waking up during a DRX on duration when there is a communication for the UE 605 during the DRX on duration， and sleeping during the DRX on duration when there are no communications for the UE 605 during the DRX on duration.

As indicated above， FIG. 6 is provided as an example. Other examples are possible and may differ from what was described with respect to FIG. 6.

FIG. 7 is a diagram illustrating another example 700 of wakeup signaling in a multi-beam system. As shown in FIG. 7， a UE 705 may communicate with a base station 710 in a system that uses multiple beams for wireless communication. In some aspects， the UE 705 may correspond to one or more UEs described elsewhere herein， such as the UE 120， the UE 505， the UE 605， and/or the like. Additionally， or alternatively， the base station 710 may correspond to one or more base stations described elsewhere herein， such as the base station 110， the base station 510， the base station 610， and/or the like. FIG. 7 shows an example where the UE 705 uses a beam configuration for multiple AGI periods， and performs a beam management procedure based at least in part on receiving an AGI.

At 715， the UE 705 and the base station 710 may configure one or more beams for transmission and/or reception of an AGI， as described in more detail above in connection with FIG. 5. The configuration of the one or more beams may be performed during a beam management (BM) period 720， and may be referred to as a beam management procedure. As further shown， the UE 705 and the base station 710 may configure a set of active beams (e.g.， one or more active beams) as part of the beam management procedure. In some aspects， an active beam may refer to a beam to be used for transmission of one or more communications during the DRX on duration. In some aspects， the set of active beams may be the set of beams with the best channel conditions as compared to other beams. In some aspects， the set of active beams may be a subset of the set of beams configured for AGI. In some aspects， the set of active beams may be the same as the set of beams configured for AGI. In example 700， a single active beam is configured. In some aspects， multiple active beams may be configured.

At 725， the base station 710 may transmit the AGI or skip transmission of the AGI on the one or more beams based at least in part on whether a communication is to be transmitted to the UE 705 during the DRX on duration. In example 700， the base station 710 transmits the AGI (e.g.， a wakeup signal) based at least in part on determining that the communication is to be transmitted to the UE 705 during the DRX on duration， in a similar manner as described above in connection with FIG. 5. As shown， the base station 710 transmits the AGI on an active beam. In this case， the active beam is shown as a single beam. In some aspects， the base station 710 may transmit the AGI on multiple active beams. As further shown， the base station 710 transmits the AGI on the active beam during a first AGI period 730.

At 735， the UE 705 monitors the one or more configured beams (shown as two beams in this case) for the AGI during the first AGI period 730， and receives the AGI on the active beam. Based at least in part on receiving the AGI on the active beam， the UE 705 wakes up during a first DRX on duration 740 to receive a communication from the base station 710.

At 745， the base station 710 may transmit a communication to the UE 705， during the first DRX on duration 740， on the active beam. At 750， the UE 705 receives the communication from the base station 710， during the first DRX on duration 740， on the active beam. In this case， the active beam is the same beam via which the AGI was transmitted during the first AGI period 730.

At 755， the base station 710 detects a beam change (e.g.， a change in a channel condition of one or more beams) ， which triggers a change in the active beam. In this case， the base station 710 determines a new active beam (e.g.， based at least in part on one or more beam measurements and/or reports) ， and transmits the AGI on the new active beam during a second AGI period 760.

At 765， the UE 705 monitors the configured one or more beams (shown as two beams in this case) for the AGI during the second AGI period 760. In this case， the same beam configuration is used for multiple AGI periods. For example， the one or more antenna beams configured during the beam management period 720 are used for the first AGI period 730 and the second AGI period 760. As shown， the UE 705 receives the AGI on the new active beam.

At 770， the UE 705 and the base station 710 may perform a beam management procedure to select an active beam during a second beam management (BM) period 775. In some aspects， the beam management procedure may be triggered based at least in part on the UE 705 receiving the AGI on one or more beams (e.g.， a set of beams) that are different from a current set of active beams. For example， the UE 705 receives the AGI on a new active beam during the second AGI period 760， which is different from the active beam via which the AGI was received during the first AGI period 730. This may trigger the beam management procedure for selection of an active beam. In some aspects， the UE 705 may select a set of beams (e.g.， one or more beams) on which the AGI is received as the active set of beams. Additionally， or alternatively， the UE 705 and/or the base station 710 may perform a beam management procedure to determine channel conditions， and may use the channel conditions to select a set of active beams， as described in more detail above. The selected set of active beams may be used for one or more communications in a second DRX on duration 780.

At 785， the base station 710 may transmit one or more communications to the UE 705， during the second DRX on duration 780， on the selected set of active beams. At 790， the UE 705 may receive the one or more communications from the base station 710， during the second DRX on duration 780， on the selected set of active beams. In this way， the UE 705 and the base station 710 may manage multiple beams in association with AGIs， thereby improving network performance and conserving battery power.

As indicated above， FIG. 7 is provided as an example. Other examples are possible and may differ from what was described with respect to FIG. 7.

FIG. 8 is a flow chart of a method 800 of wireless communication. The method may be performed by a UE (e.g.， the UE 120， the UE 505， the UE 605， the UE 705， the apparatus 1002/1002’， and/or the like) .

At 810， the UE may configure one or more beams for reception of an AGI. For example， the UE may configure one or more beams for reception of an AGI， as described above in connection with FIGs. 5-7.

At 820， the UE may monitor the one or more beams for the AGI. For example， the UE may monitor the one or more beams for the AGI， as described above in connection with FIGs. 5-7. In some aspects， the AGI indicates whether the UE is to wake up or sleep during a DRX on duration.

At 830， the UE may wake up or sleep during a DRX on duration based at least in part on whether the AGI is received. For example， the UE may wake up or sleep during a DRX on duration based at least in part on whether the AGI is received， as described above in connection with FIGs. 5-7.

In some aspects， the AGI is a wakeup signal and the UE is configured to wake up during the DRX on duration if the wakeup signal is received and is configured to sleep during the DRX on duration if the wakeup signal is not received. In some aspects， the AGI is a go-to-sleep signal and the UE is configured to sleep during the DRX on duration if the go-to-sleep signal is received and is configured to wake up during the DRX on duration if the go-to-sleep signal is not received.

In some aspects， the one or more beams are configured before each AGI period in which the UE monitors for the AGI. In some aspects， the one or more beams are configured after a configured number of AGI periods in which the UE monitors for the AGI. In some aspects， the one or more beams are configured in association with a first AGI period in which the UE monitors for the AGI， and the UE is configured to monitor the one or more beams for the AGI in association with a second AGI period.

In some aspects， a set of beams on which the AGI is received is configured as an active set of beams used for reception of a communication during the DRX on duration. In some aspects， a beam management procedure， to select a set of active beams， is triggered when the AGI is received on a set of beams that are different from a current set of active beams.

In some aspects， the one or more beams includes a subset of a full set of beams associated with the UE. In some aspects， at least one beam， of the one or more beams， is monitored for the AGI based at least in part on a sequence used to monitor the one or more beams for the AGI. In some aspects， the one or more beams include all beams in a full set of beams associated with the UE. In some aspects， the AGI is enabled on a per-UE basis or a per-UE group basis.

Although FIG. 8 shows example blocks of a method of wireless communication， in some aspects， the method may include additional blocks， fewer blocks， different blocks， or differently arranged blocks than those shown in FIG. 8. Additionally， or alternatively， two or more blocks shown in FIG. 8 may be performed in parallel.

FIG. 9 is a flow chart of a method 900 of wireless communication. The method may be performed by a base station (e.g.， the base station 110， the base station 510， the base station 610， the base station 710， the apparatus 1202/1202’， and/or the like) .

At 910， the base station may configure one or more beams for an AGI. For example， the base station may configure one or more beams for an AGI， as described above in connection with FIGs. 5-7. In some aspects， the AGI may be associated with a UE (e.g.， may be transmitted to a UE) . In some aspects， the AGI indicates whether the UE is to wake up or sleep during a DRX on duration.

At 920， the base station may determine whether a communication is to be transmitted to a UE during a DRX on duration. For example， the base station may determine whether a communication is to be transmitted to the UE during the DRX on duration， as described above in connection with FIGs. 5-7.

At 930， the base station may transmit or skip transmission of the AGI to the UE on the one or more beams. For example， the base station may transmit or skip transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration， as described above in connection with FIGs. 5-7.

In some aspects， the AGI is a wakeup signal and the base station is configured to transmit the wakeup signal when the communication is to be transmitted to the UE during the DRX on duration and is configured to skip transmission of the wakeup signal when the communication is not to be transmitted to the UE during the DRX on duration. In some aspects， the AGI is a go-to-sleep signal and the base station is configured to transmit the go-to-sleep signal when the communication is not to be transmitted to the UE during the DRX on duration and is configured to skip transmission of the go-to-sleep signal when the communication is to be transmitted to the UE during the DRX on duration.

In some aspects， the one or more beams are configured before an AGI period for transmission of the AGI. In some aspects， the one or more beams are configured after a configured number of AGI periods. In some aspects， the one or more beams are used for transmission of AGI during multiple AGI periods.

Although FIG. 9 shows example blocks of a method of wireless communication， in some aspects， the method may include additional blocks， fewer blocks， different blocks， or differently arranged blocks than those shown in FIG. 9. Additionally， or alternatively， two or more blocks shown in FIG. 9 may be performed in parallel.

FIG. 10 is a conceptual data flow diagram 1000 illustrating the data flow between different modules/means/components in an example apparatus 1002. The apparatus 1002 may be a UE. In some aspects， the apparatus 1002 includes a reception module 1004， a configuration module 1006， a monitoring module 1008， a wakeup/sleep module 1010， and/or a transmission module 1012.

In some aspects， the reception module 1004 may receive information 1014 from a base station 1050， such as one or more reference signals and/or a command to configure beams for AGI. In some aspects， the reception module 1004 may provide information 1016 to the configuration module 1006， such as information derived from the one or more reference signals and/or the command. The configuration module 1006 may configure one or more beams for reception of an AGI. In some aspects， the configuration module 1006 may provide information 1018 relating to the configuration to the transmission module 1012， which may provide such information 1020 to the base station 1050 to assist with such configuration. In some aspects， the configuration module 1006 may provide information 1022 to the reception module 1004， which may configure one or more antennas based at least in part on the information 1022 (e.g.， the beam configuration) .

In some aspects， the configuration module 1006 may provide information 1024 to the monitoring module 1008， such as information that identifies one or more beams to be monitored. The monitoring module 1008 may monitor one or more beams for AGI based at least in part on the information 1024. In some aspects， the monitoring module 1008 may interact with the reception module 1004 to perform such monitoring， and these modules may exchange information 1026. The monitoring module 1008 may provide information 1028， regarding whether an AGI was received， to the wakeup/sleep module 1010. The wakeup/sleep module 1010 may cause the apparatus 1002 to wake up or sleep during a DRX on duration based at least in part on whether the AGI was received. In some aspects， the wakeup/sleep module may interact with one or more other modules， such as reception module 1004， to provide a command to turn one or more components on or off to wake up or sleep.

The apparatus may include additional modules that perform each of the blocks of the algorithm in the aforementioned flow chart of FIG. 8. As such， each block in the aforementioned flow chart of FIG. 8 may be performed by a module and the apparatus may include one or more of those modules. The modules may be one or more hardware components specifically configured to carry out the stated processes/algorithm， implemented by a processor configured to perform the stated processes/algorithm， stored within a computer-readable medium for implementation by a processor， or some combination thereof.

The number and arrangement of modules shown in FIG. 10 are provided as an example. In practice， there may be additional modules， fewer modules， different modules， or differently arranged modules than those shown in FIG. 10. Furthermore， two or more modules shown in FIG. 10 may be implemented within a single module， or a single module shown in FIG. 10 may be implemented as multiple， distributed modules. Additionally， or alternatively， a set of modules (e.g.， one or more modules) shown in FIG. 10 may perform one or more functions described as being performed by another set of modules shown in FIG. 10.

FIG. 11 is a diagram 1100 illustrating an example of a hardware implementation for an apparatus 1002′employing a processing system 1102. The apparatus 1002′may be a UE.

The processing system 1102 may be implemented with a bus architecture， represented generally by the bus 1104. The bus 1104 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1102 and the overall design constraints. The bus 1104 links together various circuits including one or more processors and/or hardware modules， represented by the processor 1106， the

modules

1004， 1006， 1008， 1010， and/or 1012， and the computer-readable medium /memory 1108. The bus 1104 may also link various other circuits such as timing sources， peripherals， voltage regulators， and power management circuits， which are well known in the art， and therefore， will not be described any further.

The processing system 1102 may be coupled to a transceiver 1110. The transceiver 1110 is coupled to one or more antennas 1112. The transceiver 1110 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 1110 receives a signal from the one or more antennas 1112， extracts information from the received signal， and provides the extracted information to the processing system 1102， specifically the reception module 1004. In addition， the transceiver 1110 receives information from the processing system 1102， specifically the transmission module 1012， and based at least in part on the received information， generates a signal to be applied to the one or more antennas 1112. The processing system 1102 includes a processor 1106 coupled to a computer-readable medium /memory 1108. The processor 1106 is responsible for general processing， including the execution of software stored on the computer-readable medium /memory 1108. The software， when executed by the processor 1106， causes the processing system 1102 to perform the various functions described supra for any particular apparatus. The computer-readable medium /memory 1108 may also be used for storing data that is manipulated by the processor 1106 when executing software. The processing system further includes at least one of the

modules

1004， 1006， 1008， 1010， and/or 1012. The modules may be software modules running in the processor 1106， resident/stored in the computer readable medium /memory 1108， one or more hardware modules coupled to the processor 1106， or some combination thereof. The processing system 1102 may be a component of the UE 120 and may include the memory 282 and/or at least one of the TX MIMO processor 266， the RX processor 258， and/or the controller/processor 280.

In some aspects， the apparatus 1002/1002′for wireless communication includes means for configuring one or more beams for reception of an AGI， means for monitoring the one or more beams for the AGI， means for waking up or sleeping during the DRX on duration based at least in part on whether the AGI is received， and/or the like. The aforementioned means may be one or more of the aforementioned modules of the apparatus 1002 and/or the processing system 1102 of the apparatus 1002′configured to perform the functions recited by the aforementioned means. As described supra， the processing system 1102 may include the TX MIMO processor 266， the RX processor 258， and/or the controller/processor 280. As such， in one configuration， the aforementioned means may be the TX MIMO processor 266， the RX processor 258， and/or the controller/processor 280 configured to perform the functions recited by the aforementioned means.

FIG. 11 is provided as an example. Other examples are possible and may differ from what was described in connection with FIG. 11.

FIG. 12 is a conceptual data flow diagram 1200 illustrating the data flow between different modules/means/components in an example apparatus 1202. The apparatus 1202 may be a base station. In some aspects， the apparatus 1202 includes a reception module 1204， a configuration module 1206， a determining module 1208， and/or a transmission module 1210.

In some aspects， the reception module 1204 may receive information 1212 from a UE 1250， such as one or more reference signals and/or other information relating to configuring one or more beams for AGI. The reception module 1204 may provide such information to the configuration module 1206 as information 1214， and the configuration module may configure one or more beams for AGI based at least in part on the information 1214. In some aspects， the configuration module 1206 may provide information 1216 regarding the configured beam (s) to the transmission module 1210， which may provide such information to the UE 1250 as information 1218.

In some aspects， the configuration module 1206 may provide information 1220 regarding the configured beams (s) to the determining module 1208. Additionally， or alternatively， the reception module 1204 may receive an indication of a communication to be transmitted to the UE 1250， and may provide such indication to the determining module 1208 as information 1222. The determining module 1208 may determine whether a communication is to be transmitted to the UE 1250 during a DRX on duration， and may provide information 1224 associated with this determination to the transmission module 1210. The transmission module 1210 may transmit AGI to the 1250 on the one or more configured beams (e.g.， as information 1218) .

The apparatus may include additional modules that perform each of the blocks of the algorithm in the aforementioned flow chart of FIG. 9. As such， each block in the aforementioned flow chart of FIG. 9 may be performed by a module and the apparatus may include one or more of those modules. The modules may be one or more hardware components specifically configured to carry out the stated processes/algorithm， implemented by a processor configured to perform the stated processes/algorithm， stored within a computer-readable medium for implementation by a processor， or some combination thereof.

The number and arrangement of modules shown in FIG. 12 are provided as an example. In practice， there may be additional modules， fewer modules， different modules， or differently arranged modules than those shown in FIG. 12. Furthermore， two or more modules shown in FIG. 12 may be implemented within a single module， or a single module shown in FIG. 12 may be implemented as multiple， distributed modules. Additionally， or alternatively， a set of modules (e.g.， one or more modules) shown in FIG. 12 may perform one or more functions described as being performed by another set of modules shown in FIG. 12.

FIG. 13 is a diagram 1300 illustrating an example of a hardware implementation for an apparatus 1202′employing a processing system 1302. The apparatus 1202′may be a base station.

The processing system 1302 may be implemented with a bus architecture， represented generally by the bus 1304. The bus 1304 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1302 and the overall design constraints. The bus 1304 links together various circuits including one or more processors and/or hardware modules， represented by the processor 1306， the

modules

1204， 1206， 1208， and/or 1210， and the computer-readable medium /memory 1308. The bus 1304 may also link various other circuits such as timing sources， peripherals， voltage regulators， and power management circuits， which are well known in the art， and therefore， will not be described any further.

The processing system 1302 may be coupled to a transceiver 1310. The transceiver 1310 is coupled to one or more antennas 1312. The transceiver 1310 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 1310 receives a signal from the one or more antennas 1312， extracts information from the received signal， and provides the extracted information to the processing system 1302， specifically the reception module 1204. In addition， the transceiver 1310 receives information from the processing system 1302， specifically the transmission module 1210， and based at least in part on the received information， generates a signal to be applied to the one or more antennas 1312. The processing system 1302 includes a processor 1306 coupled to a computer-readable medium /memory 1308. The processor 1306 is responsible for general processing， including the execution of software stored on the computer-readable medium /memory 1308. The software， when executed by the processor 1306， causes the processing system 1302 to perform the various functions described supra for any particular apparatus. The computer-readable medium /memory 1308 may also be used for storing data that is manipulated by the processor 1306 when executing software. The processing system further includes at least one of the

modules

1204， 1206， 1208， and/or 1210. The modules may be software modules running in the processor 1306， resident/stored in the computer readable medium /memory 1308， one or more hardware modules coupled to the processor 1306， or some combination thereof. The processing system 1302 may be a component of the base station 110 and may include the memory 242 and/or at least one of the TX MIMO processor 230， the RX processor 238， and/or the controller/processor 240.

In some aspects， the apparatus 1202/1202′for wireless communication includes means for configuring one or more beams for an AGI， means for determining whether a communication is to be transmitted to a UE during a DRX on duration， means for transmitting or skipping transmission of the AGI to the UE on the one or more beams， and/or the like. The aforementioned means may be one or more of the aforementioned modules of the apparatus 1202 and/or the processing system 1302 of the apparatus 1202′configured to perform the functions recited by the aforementioned means. As described supra， the processing system 1302 may include the TX MIMO processor 230， the receive processor 238， and/or the controller/processor 240. As such， in one configuration， the aforementioned means may be the TX MIMO processor 230， the receive processor 238， and/or the controller/processor 240 configured to perform the functions recited by the aforementioned means.

FIG. 13 is provided as an example. Other examples are possible and may differ from what was described in connection with FIG. 13.

It is understood that the specific order or hierarchy of blocks in the processes /flow charts disclosed is an illustration of example approaches. Based upon design preferences， it is understood that the specific order or hierarchy of blocks in the processes /flow charts may be rearranged. Further， some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order， and are not meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art， and the generic principles defined herein may be applied to other aspects. Thus， the claims are not intended to be limited to the aspects shown herein， but is to be accorded the full scope consistent with the language claims， wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated， but rather “one or more. ” The word “exemplary” is used herein to mean “serving as an example， instance， or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise， the term “some” refers to one or more. Combinations such as “at least one of A， B， or C， ” “at least one of A， B， and C， ” and “A， B， C， or any combination thereof” include any combination of A， B， and/or C， and may include multiples of A， multiples of B， or multiples of C. Specifically， combinations such as “at least one of A， B， or C， ” “at least one of A， B， and C， ” and “A， B， C， or any combination thereof” may be A only， B only， C only， A and B， A and C， B and C， or A and B and C， where any such combinations may contain one or more member or members of A， B， or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover， nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”

Claims

A method of wireless communication performed by a user equipment (UE) ， comprising：configuring one or more beams for reception of an advanced grant indication (AGI) ；

monitoring the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and

waking up or sleeping during the DRX on duration based at least in part on whether the AGI is received.
The method of claim 1， wherein the AGI is a wakeup signal and the UE is configured to wake up during the DRX on duration if the wakeup signal is received and is configured to sleep during the DRX on duration if the wakeup signal is not received.
The method of claim 1， wherein the AGI is a go-to-sleep signal and the UE is configured to sleep during the DRX on duration if the go-to-sleep signal is received and is configured to wake up during the DRX on duration if the go-to-sleep signal is not received.
The method of claim 1， wherein the one or more beams are configured before each AGI period in which the UE monitors for the AGI.
The method of claim 1， wherein the one or more beams are configured after a configured number of AGI periods in which the UE monitors for the AGI.
The method of claim 1， wherein the one or more beams are configured in association with a first AGI period in which the UE monitors for the AGI， and the UE is configured to monitor the one or more beams for the AGI in association with a second AGI period.
The method of claim 1， wherein a set of beams on which the AGI is received is configured as an active set of beams used for reception of a communication during the DRX on duration.
The method of claim 1， wherein a beam management procedure， to select a set of active beams， is triggered when the AGI is received on a set of beams that are different from a current set of active beams.
The method of claim 1， wherein the one or more beams includes a subset of a full set of beams associated with the UE.
The method of claim 1， wherein at least one beam， of the one or more beams， is monitored for the AGI based at least in part on a sequence used to monitor the one or more beams for the AGI.
The method of claim 1， wherein the one or more beams include all beams in a full set of beams associated with the UE.
The method of claim 1， wherein the AGI is enabled on a per-UE basis or a per-UE group basis.
A method of wireless communication performed by a base station， comprising：

configuring one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration；

determining whether a communication is to be transmitted to the UE during the DRX on duration； and

transmitting or skipping transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.
The method of claim 13， wherein the AGI is a wakeup signal and the base station is configured to transmit the wakeup signal when the communication is to be transmitted to the UE during the DRX on duration and is configured to skip transmission of the wakeup signal when the communication is not to be transmitted to the UE during the DRX on duration.
The method of claim 13， wherein the AGI is a go-to-sleep signal and the base station is configured to transmit the go-to-sleep signal when the communication is not to be transmitted to the UE during the DRX on duration and is configured to skip transmission of the go-to-sleep signal when the communication is to be transmitted to the UE during the DRX on duration.
The method of claim 13， wherein the one or more beams are configured before an AGI period for transmission of the AGI.
The method of claim 13， wherein the one or more beams are configured after a configured number of AGI periods.
The method of claim 13， wherein the one or more beams are used for transmission of AGI during multiple AGI periods.
A user equipment (UE) for wireless communication， comprising：

memory； and

one or more processors coupled to the memory， the memory and the one or more processors configured to：

configure one or more beams for reception of an advanced grant indication (AGI) ；

monitor the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and

wake up or sleep during the DRX on duration based at least in part on whether the AGI is received.
A base station for wireless communication， comprising：

memory； and

one or more processors coupled to the memory， the memory and the one or more processors configured to：

configure one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration；

determine whether a communication is to be transmitted to the UE during the DRX on duration； and

transmit or skip transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.
An apparatus for wireless communication， comprising：

means for configuring one or more beams for reception of an advanced grant indication (AGI) ；

means for monitoring the one or more beams for the AGI， wherein the AGI indicates whether the apparatus is to wake up or sleep during a discontinuous reception (DRX) on duration； and

means for waking up or sleeping during the DRX on duration based at least in part on whether the AGI is received.
An apparatus for wireless communication， comprising：

means for configuring one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration；

means for determining whether a communication is to be transmitted to the UE during the DRX on duration； and

means for transmitting or skipping transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.
A non-transitory computer-readable medium storing one or more instructions for wireless communication， the one or more instructions comprising：

one or more instructions that， when executed by one or more processors of a user equipment (UE) ， cause the one or more processors to：

configure one or more beams for reception of an advanced grant indication (AGI) ；

monitor the one or more beams for the AGI， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration； and

wake up or sleep during the DRX on duration based at least in part on whether the AGI is received.
A non-transitory computer-readable medium storing one or more instructions for wireless communication， the one or more instructions comprising：

one or more instructions that， when executed by one or more processors of a base station， cause the one or more processors to：

configure one or more beams for an advanced grant indication (AGI) in association with a user equipment (UE) ， wherein the AGI indicates whether the UE is to wake up or sleep during a discontinuous reception (DRX) on duration；

determine whether a communication is to be transmitted to the UE during the DRX on duration； and

transmit or skip transmission of the AGI to the UE on the one or more beams based at least in part on whether the communication is to be transmitted to the UE during the DRX on duration.