Low power WUS transmission configuration

Abstract

Aspects of the present disclosure relate to methods, apparatuses, and systems for supporting lower power WUS transmissions. Some embodiments of the methods and apparatus described herein may also include a user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a WUS configuration in system information or UE-specific RRC signaling; monitoring the WUS in a first frequency band; and switching to receive a paging message in the second frequency band or to a DRX ON duration to receive a control signal in the second frequency band based on the WUS indication.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to wireless communications, and more particularly, to wake-up signal (WUS) transmission configuration. BACKGROUND

[0002] A wireless communication system can include one or more network communication devices, such as a base station, which can be additionally referred to as an eNodeB (eNB), a next generation NodeB (gNB), or other suitable terminology. Each network communication device, such as a base station, can support wireless communication for one or more user communication devices, which can be additionally referred to as user equipment (UE) or other suitable terminology. The wireless communication system can support wireless communication with one or more user communication devices by utilizing resources of the wireless communication system, for example, time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers). Additionally, the wireless communication system can support wireless communication across various radio access technologies, including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, and beyond 5G radio access technology (e.g., sixth generation (6G)). SUMMARY

[0003] The article “a” preceding a word is not limiting and is understood to refer to “at least one” or “one or more” of the entities following that word. The terms “one,” “at least one,” “one or more,” and “at least one of” can be construed to be interchangeable with one another. As used herein, including in the claims, “or” as used in a list of items (for example, the

[0004] The present disclosure relates to methods, apparatuses, and systems that support lower power WUS transmission.

[0005] Some implementations of the methods and apparatuses described herein can further include a user equipment (UE) for wireless communication, comprising at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to receive a WUS configuration in system information or UE-specific RRC signaling, monitor for a WUS in a first frequency band, and switch to receive a paging message in a second frequency band or switch to a DRX ON duration to receive a control signal in the second frequency band based on the WUS indication.

[0006] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to monitor for the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset. The WUS period is configured as a number of times a DRX period or a paging period. The time offset can include a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a first paging frame of a reference frame or a start frame associated with the WUS to a start frame associated with the WUS of a DRX ON duration timer, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is monitored. The additional slot offset is associated with a subcarrier spacing of the first frequency band. Alternatively, the time offset includes a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of a DRX ON duration or a paging occasion. The slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band. Further alternatively, the time offset includes an absolute time offset to a start of the DRX ON duration or the paging occasion. The absolute time offset is selected from a set of time offsets. The set of time offsets is associated with a reference subcarrier spacing.

[0007] In some embodiments, the WUS is transmitted in time domain with a configured repetition. A first number of consecutive repetitions is associated with a particular beam. The first number is determined by an actual transmit beam and a total number of repetitions.

[0008] In some embodiments, the WUS is transmitted in frequency domain with a configuration of an RIV indicating a start PRB and a PRB number. The PRB number is from a limited set.

[0009] In some embodiments, the WUS is associated with one or more waveforms. The waveform of the WUS is associated with a sequence for each transmission bit or each symbol segment. The length of the sequence is determined by the number of PRBs and the segment or transmission bit per symbol. The transmission bit per symbol or the segment of the symbol is configured in the WUS configuration. In some embodiments, the WUS is transmitted in the frequency domain with a configured repetition. The length of the sequence is determined by the number of PRBs, the transmission bit per symbol or the segment per symbol, and the number of repetitions in the frequency domain. The sequence of each transmission bit or multiple transmission bits is initialized by at least one of the time slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0010] In some embodiments, the WUS carries information for distinguishing UEs. The WUS can carry information of at least one of the time slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS. Alternatively, the WUS carries information of an RNTI and / or a location indication corresponding to a high layer configured control signal. Further alternatively, the WUS is generated from encoded bits with a CRC. The encoded bits are scrambled by a scrambling sequence. The scrambling sequence is initialized by at least one of the time slot number, the symbol number, the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS. The time slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS in the second frequency band are scaled to the subcarrier spacing in the first frequency band.

[0011] In some embodiments, the waveform of the WUS is determined by the payload size of the WUS, the number of subgroups of the PO or DRX, the number of associated POs of the WUS, or the UE connection mode.

[0012] Some implementations of the methods and apparatuses described herein can include a processor in a UE for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: receive a WUS configuration in system information or UE specific RRC signaling; monitor for a WUS in a first frequency band; and based on the WUS indication, switch to receive a paging message in a second frequency band or switch to a DRX on-duration to receive a control signal in the second frequency band.

[0013] Some implementations of the methods and apparatuses described herein can include a method performed by a user equipment (UE), the method comprising: receiving a WUS configuration in system information or UE specific RRC signaling; monitoring for a WUS in a first frequency band; and based on the WUS indication, switching to receive a paging message in a second frequency band or switching to a DRX on-duration to receive a control signal in the second frequency band.

[0014] Some implementations of the methods and apparatuses described herein can include at least one memory and at least one processor coupled with the at least one memory and configured to cause a base station to: transmit, in system information or UE-specific RRC signaling, a WUS configuration; transmit a WUS in a first frequency band; and transmit, based on the WUS indication, a paging message or a control signal in a second frequency band. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 illustrates an example of a wireless communication system, in accordance with aspects of the present disclosure.

[0016] Figure 2 FIG. 2 illustrates an example of a user equipment (UE) 200, in accordance with aspects of the present disclosure.

[0017] Figure 3 FIG. 3 illustrates an example of a processor 300, in accordance with aspects of the present disclosure.

[0018] Figure 4 FIG. 4 illustrates an example of a network equipment (NE) 400, in accordance with aspects of the present disclosure.

[0019] Figure 5 FIG. 5 illustrates an example of PO determination.

[0020] Figure 6 FIG. 6 illustrates a wake-up signal communicated in DCI format 2_6.

[0021] FIGS. 7(a) and 7(b) illustrate a super low power wake-up receiver and a main radio.

[0022] Figure 8 FIG. 8 illustrates an example of a first option for determining a time offset.

[0023] FIGS. 9(a) and 9(b) illustrate two examples of a second option for determining a time offset.

[0024] Figure 10 FIG. 10 illustrates a flow diagram of a method performed by a UE, in accordance with aspects of the present disclosure.

[0025] Figure 11 FIG. 11 illustrates a flow diagram of a method performed by a NE, in accordance with aspects of the present disclosure. DETAILED DESCRIPTION

[0026] Aspects of the present disclosure are described in the context of a wireless communication system.

[0027] Figure 1An example of a wireless communication system 100 according to various aspects of this disclosure is illustrated. The wireless communication system 100 may include one or more NEs 102, one or more UEs 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some embodiments, the wireless communication system 100 may be a 4G network, such as an LTE (Long Term Evolution) network or an LTE-Advanced (LTE-A) network. In some other embodiments, the wireless communication system 100 may be a new radio (NR) network, such as a 5G network, an 5G-Advanced (5G-A) network, or a 5G Ultra Wideband (5G-UWB) network. In other embodiments, the wireless communication system 100 may be a combination of 4G and 5G networks, or other suitable radio access technologies, including IEEE 802.11 (Wi-Fi), IEEE 802.16 (Wi MAX), and IEEE 802.20. The wireless communication system 100 may support radio access technologies other than 5G, such as 6G. In addition, the wireless communication system 100 can support technologies such as time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA).

[0028] One or more NEs 102 may be distributed throughout a geographic area to form a wireless communication system 100. The one or more NEs 102 described herein may be, include, or may be referred to as network nodes, base stations, network elements, network functions, network entities, radio access networks (RANs), Node Bs, eNodeBs (eNBs), next-generation Node Bs (gNBs), or other suitable terms. NEs 102 and UEs 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, NEs 102 and UEs 104 may perform wireless communication (e.g., receiving signaling, sending signaling) via a Uu interface.

[0029] NE 102 can provide a geographic coverage area, and NE 102 can support the services of one or more UEs 104 within that geographic coverage area. For example, NE 102 and UE 104 can support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcasting, etc.) based on one or more radio access technologies. In some embodiments, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some embodiments, different geographic coverage areas 112 associated with the same or different radio access technologies can overlap, but different geographic coverage areas can be associated with different NEs 102.

[0030] One or more UEs 104 can be dispersed throughout the geographic area of the wireless communications system 100. A UE 104 can include or can be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology. In some implementations, a UE 104 can be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, a UE 104 can be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples.

[0031] A UE 104 can be able to directly communicate with other UEs 104 through a communication link. For example, a UE 104 can be able to directly communicate with another UE 104 through a device-to-device (D2D) communication link. In some implementations, a communication link 114 can be referred to as a sidelink. For example, a UE 104 can be able to directly communicate with another UE 104 through a PC5 interface.

[0032] A NE 102 can support communication with a CN 106, or with another NE 102, or both. For example, a NE 102 can interface with other NEs 102 or the CN 106 through one or more backhaul links 116 (e.g., S1, N2, N3, or network interface). Network entities 102 can communicate with each other over backhaul links 116 (e.g., via X2, Xn, or another network interface). In some implementations, the NEs 102 can communicate directly with each other. In some implementations, one or more of the NEs 102 can include subcomponents, such as an access network entity, which can be an example of an access node controller (ANC). An ANC can communicate with one or more UEs 104 through one or more other access network transmission entities (which can be referred to as a radio head, a smart radio head, or a transmission reception point (TRP)).

[0033] The CN 106 can support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 can be an evolved packet core (EPC) or 5G Core (5GC), which can include a control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility and a user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. In some implementations, the control plane entity can manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management (e.g., for data bearers, signaling bearers, etc.) for one or more UEs 104 served by one or more NEs 102 associated with the CN 106.

[0034] The CN 106 can communicate with the packet data network 108 through one or more backhaul links (e.g., via an SI, N2, N3, or another network interface). The packet data network 108 can include the application server 118. In some implementations, the one or more UEs 104 can communicate with the application server 118 using the CN 106. The UE 104 can establish a session (e.g., a protocol data unit (PDU) session, etc.) with the CN 106 via the NE 102. The CN 106 can use the established session (e.g., the established PDU session) to route traffic (e.g., control information, data, etc.) between the UE 104 and the application server 118. The PDU session can be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106).

[0035] In the wireless communication system 100, the NEs 102 and the UEs 104 can use resources (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers) of the wireless communication system 100 to perform various operations (e.g., wireless communications). In some implementations, the NEs 102 and the UEs 104 can support different resource structures. For example, the NEs 102 and the UEs 104 can support different frame structures. In some implementations, such as in 4G, the NEs 102 and the UEs 104 can support a single frame structure. In some other implementations, such as in 5G and other suitable radio access technologies, the NEs 102 and the UEs 104 can support various frame structures (i.e., multiple frame structures). The NEs 102 and the UEs 104 can support the various frame structures based on one or more numerologies.

[0036] One or more numerologies can be supported in the wireless communication system 100, and a numerology can include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., = 0) can be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., = 0) associated with the first subcarrier spacing (e.g., 15 kHz) can utilize one slot per subframe. A second numerology (e.g., = 1) can be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., = 2) can be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., = 3) can be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., = 4) can be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.

[0037] Time intervals for the resources (e.g., communication resources) can be organized as frames, which can also be referred to as radio frames. Each frame can have a duration of, for example, 10 milliseconds (ms). In some implementations, each frame can include multiple subframes. For example, each frame can include 10 subframes, and each subframe can have a duration of, for example, 1 ms. In some implementations, each frame can have the same duration. In some implementations, each subframe of a frame can have a same duration.

[0038] Additionally or alternatively, time intervals of resources (e.g., communication resources) can be organized as slots, for example, depending on the numerology being used. For example, a subframe can include a number of slots (e.g., 2 slots). The number of slots in each subframe can also depend on the one or more numerologies supported in the wireless communication system 100. For example, the first, second, third, fourth, and fifth numerologies (i.e., = 0, = 1, = 2, = 3, = 4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz can utilize 7, 4, 2, 1, and 1 slots per subframe, respectively. ​​​​​​​​​= 4) can utilize one time slot per subframe, two time slots per subframe, four time slots per subframe, eight time slots per subframe, and 16 time slots per subframe, respectively. Each time slot can include a quantity (e.g., number) of symbols (e.g., OFDM symbols). In some implementations, the quantity (e.g., number) of time slots for a subframe can depend on a numerology. For a normal cyclic prefix, a time slot can include 14 symbols. For an extended cyclic prefix (e.g., applicable to 60 kHz subcarrier spacing), a time slot can include 12 symbols. The quantity of symbols per time slot, the quantity of time slots per subframe, and the quantity of time slots per frame for normal and extended cyclic prefixes can depend on the numerology. It should be understood that a reference to a first numerology (e.g., = 0) associated with a subcarrier spacing (e.g., 15 kHz) can be used interchangeably between subframes and time slots.

[0039] In the wireless communications system 100, the electromagnetic (EM) spectrum can be partitioned into various classes, bands, frequency channels, and / or the like. By way of example, the wireless communications system 100 can support one or more operating bands, such as frequency range designations FR1 (410 MHz - 7.125 GHz), FR2 (24.25 GHz - 52.6 GHz), FR3 (7.125 GHz - 24.25 GHz), FR4 (52.6 GHz - 114.25 GHz), FR4a or FR4-1 (52.6 GHz - 71 GHz), and FR5 (114.25 GHz - 300 GHz). In some implementations, the NEs 102 and the UEs 104 can perform wireless communication on one or more of the operating bands. In some implementations, FR1 can be used by the NEs 102 and the UEs 104, and other equipment or devices, for cellular communications traffic (e.g., control information, data). In some implementations, FR2 can be used by the NEs 102 and the UEs 104, and other equipment or devices, for short range, high data rate capabilities.

[0040] FR1 can be associated with one or more numerologies (e.g., at least three numerologies). For example, FR1 can be associated with a first numerology (e.g., = 0) that includes a 15 kHz subcarrier spacing; a second numerology (e.g., = 1) that includes a 30 kHz subcarrier spacing; and a third numerology (e.g., = 2) that includes a 60 kHz subcarrier spacing. FR2 can be associated with one or more numerologies (e.g., at least two numerologies). For example, FR2 can be associated with a third numerology (e.g., = 2) that includes a 60 kHz subcarrier spacing. ​​​​= 2) and a fourth parameter set (e.g., including 120 kHz subcarrier spacing) = 3) are associated.

[0041] Figure 2 An example of a UE 200 is illustrated in accordance with aspects of the present disclosure. The UE 200 can include a processor 202, a memory 204, a controller 206, and a transceiver 208. The processor 202, the memory 204, the controller 206, or the transceiver 208, or various combinations thereof or various components thereof, can be examples of means for performing various aspects of the present disclosure as described herein. These components can be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0042] The processor 202, the memory 204, the controller 206, or the transceiver 208, or various combinations thereof or components thereof, can be implemented in hardware (e.g., circuitry). The hardware can include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof, configured to or otherwise supporting the means for performing the functions described in the present disclosure.

[0043] The processor 202 can include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 202 can be configured to operate the memory 204. In some other implementations, the memory 204 can be integrated into the processor 202. The processor 202 can be configured to execute computer-readable instructions stored in the memory 204 to cause the UE 200 to perform various functions of the present disclosure.

[0044] The memory 204 can include volatile or non-volatile memory. The memory 204 can store computer-readable, computer-executable code including instructions that, when executed by the processor 202, cause the UE 200 to perform various functions described herein. The code can be stored in a non-transitory computer-readable medium such as the memory 204 or another type of memory. Computer-readable media include both volatile and non-volatile media, removable and non-removable media, and communication media. Communication media include any medium that facilitates

[0045] In some implementations, the processor 202 and the memory 204 coupled with the processor 202 can be configured to cause the UE 200 to perform one or more functions described herein (e.g., by the processor 202 executing instructions stored in the memory 204). For example, the processor 202 can support wireless communication at the UE 200, in accordance with examples as disclosed herein. The UE 200 can be configured to support a means for determining that a physical uplink shared channel (PUSCH) transmission is associated with a plurality of phase tracking reference signal (PTRS) ports; and transmitting the PUSCH transmission with the plurality of PTRS ports.

[0046] The controller 206 can manage input and output signals for the UE 200. The controller 206 also can manage peripherals not integrated into the UE 200. In some implementations, the controller 206 can be implemented as a part of a processor 202, such as a processor 202 shown in FIG. 2. In some implementations, the controller 206 can be implemented as a part of a processor 202.

[0047] In some implementations, the UE 200 can include at least one transceiver 208. In some other implementations, the UE 200 can have more than one transceiver 208. The transceiver 208 can represent a wireless transceiver. The transceiver 208 can include one or more receiver chains 210, one or more transmitter chains 212, or a combination thereof.

[0048] The receiver chain 210 can be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receiver chain 210 can include one or more antennas to receive signals over the air or wireless medium. The receiver chain 210 can include at least one amplifier (e.g., a low noise amplifier (LNA)) configured to amplify a received signal. The receiver chain 210 can include at least one demodulator configured to demodulate a received signal and obtain transmitted data by reversing a modulation technique applied during transmission of the signal. The receiver chain 210 can include at least one decoder to decode process a demodulated signal to receive transmitted data.

[0049] ​​The transmitter chain 212 can be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 212 can include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over the wireless medium. The at least one modulator can be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or a digital modulation scheme, like phase-shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 212 can also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level for transmission over the wireless medium. The transmitter chain 212 can further include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0050] Figure 3 An example of a processor 300 is illustrated in accordance with aspects of the present disclosure. The processor 300 can be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 300 can include a controller 302 configured to perform various operations in accordance with examples as described herein. The processor 300 can optionally include at least one memory 304, which can be, for example, a LI / L2 / L3 cache. Additionally or alternatively, the processor 300 can optionally include one or more arithmetic logic units (ALUs) 306. One or more of these components can be in electronic communication or otherwise (e.g., operatively, communicatively, functionally, electronically, electrically) coupled via one or more interfaces (e.g., buses).

[0051] The processor 300 can be a processor chipset and include a protocol stack (e.g., software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples described herein. The processor chipset can include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., processor 300)) or other memory (e.g., random access memory (RAM), read only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (Fe RAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase change memory (PCM), etc.).

[0052] The controller 302 can be configured to manage and coordinate the various operations (e.g., signaling, receiving, obtaining, retrieving, sending, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 300 to enable the processor 300 to support various operations in accordance with examples as described herein. For example, the controller 302 can operate as a control unit of the processor 300, generating control signals that manage the operation of the various components of the processor 300. These control signals include enabling or disabling functional units, selecting data paths, initiating memory accesses, and coordinating operational timing.

[0053] The controller 302 can be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 304 and determine subsequent instructions to be executed to enable the processor 300 to support various operations in accordance with examples as described herein. The controller 302 can be configured to track memory addresses of instructions associated with the memory 304. The controller 302 can be configured to decode instructions to determine operations to be performed and operands involved. For example, the controller 302 can be configured to interpret instructions and determine control signals to be output to other components of the processor 300 to enable the processor 300 to support various operations in accordance with examples as described herein. Additionally or alternatively, the controller 302 can be configured to manage data flow within the processor 300. The controller 302 can be configured to control data transfers between registers, arithmetic logic units (ALUs), and other functional units of the processor 300.

[0054] The memory 304 can include one or more caches (e.g., memory local to or included in the processor 300, such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash, etc.). In some implementations, the memory 304 can reside within or on a processor chipset (e.g., local to the processor 300). In some other implementations, the memory 304 can reside outside of the processor chipset (e.g., remote from the processor 300).

[0055] Memory 304 can store computer-readable, computer-executable code including instructions that, when executed by processor 300, cause processor 300 to perform various functions described herein. The code can be stored in a non-transitory computer-readable medium such as system memory or another type of memory. Controller 302 and / or processor 300 can be configured to execute computer-readable instructions stored in memory 304 to cause processor 300 to perform various functions. For example, processor 300 and / or controller 302 can be coupled with or to memory 304, and processor 300, controller 302, and memory 304 can be configured to perform the various functions described herein. In some examples, processor 300 can include multiple processors, and memory 304 can include multiple memories. One or more of the multiple processors can be coupled with one or more of the multiple memories, which can individually or collectively be configured to perform the various functions herein.

[0056] One or more ALUs 306 can be configured to support various operations in accordance with examples as described herein. In some implementations, one or more ALUs 306 can reside within or on a processor chipset (e.g., processor 300). In some other implementations, one or more ALUs 306 can reside outside of a processor chipset (e.g., processor 300). One or more ALUs 306 can perform one or more computations on data, such as addition, subtraction, multiplication, and division. For example, one or more ALUs 306 can receive input operands and an opcode that determines the operation to be performed. One or more ALUs 306 are configured with various logic and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to the operation. Additionally or alternatively, one or more ALUs 306 can support logical operations such as AND, OR, exclusive OR (XOR), or NOT, and NAND, enabling one or more ALUs 306 to handle conditional operations, comparisons, and bitwise operations.

[0057] Processor 300 can support wireless communications in accordance with examples disclosed herein. Processor 300 can be configured as or operable to support a means for determining that a physical uplink shared channel (PUSCH) transmission is associated with a plurality of phase tracking reference signal (PTRS) ports; and transmitting the PUSCH transmission with the plurality of PTRS ports.

[0058] Figure 4An example of a NE 400 is illustrated in accordance with aspects of the present disclosure. The NE 400 can include a processor 402, a memory 404, a controller 406, and a transceiver 408. The processor 402, the memory 404, the controller 406, or the transceiver 408, or various combinations thereof or various components thereof, can be examples of means for performing various aspects of the present disclosure as described herein. These components can be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0059] The processor 402, the memory 404, the controller 406, or the transceiver 408, or various combinations thereof or components thereof, can be implemented with hardware (e.g., circuitry). The hardware can include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof, configured to or otherwise supporting the execution of functions described in the present disclosure.

[0060] The processor 402 can include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some embodiments, the processor 402 can be configured to operate the memory 404. In some other embodiments, the memory 404 can be integrated into the processor 402. The processor 402 can be configured to execute computer-readable instructions stored in the memory 404 to cause the NE 400 to perform various functions of the present disclosure.

[0061] The memory 404 can include volatile or non-volatile memory. The memory 404 can store computer-readable, computer-executable code including instructions that are

[0062] In some implementations, the processor 402 and the memory 404 coupled with the processor 402 can be configured to cause the NE 400 to perform one or more functions described herein (e.g., execution of instructions stored in the memory 404 by the processor 402). For example, the processor 402 can support wireless communications at the NE 400, in accordance with examples disclosed herein. The NE 400 can be configured to support a means for determining that a physical uplink shared channel (PUSCH) transmission is associated with a plurality of phase tracking reference signal (PTRS) ports; and receiving the PUSCH transmission with the plurality of PTRS ports.

[0063] The controller 406 can manage input and output signals for the NE 400. The controller 406 can also manage peripherals not integrated into the NE 400. In some implementations, the controller 406 can utilize an operating system such as iOS , ANDROID , WINDOWS , or other operating system. In some implementations, the controller 406 can be implemented as part of a processor 402.

[0064] In some implementations, the NE 400 can include at least one transceiver 408. In some other implementations, the NE 400 can have more than one transceiver 408. The transceiver 408 can represent a wireless transceiver. The transceiver 408 can include one or more receiver chains 410, one or more transmitter chains 412, or a combination thereof.

[0065] The receiver chain 410 can be configured to receive signals (e.g., control information, data, packets) on a wireless medium. For example, the receiver chain 410 can include one or more antennas to receive signals over the air or wireless medium. The receiver chain 410 can include at least one amplifier (e.g., a low noise amplifier (LNA)) configured to amplify a received signal. The receiver chain 410 can include at least one demodulator configured to demodulate a received signal and obtain transmitted data by reversing a modulation technique applied during transmission of the signal. The receiver chain 410 can include at least one decoder to decode process a demodulated signal to receive transmitted data.

[0066] The transmitter chain 412 can be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 412 can include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over the wireless medium. The at least one modulator can be configured to support one or more technologies, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes, like phase-shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 412 can also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level for transmission over the wireless medium. The transmitter chain 412 can further include one or more antennas for transmitting the amplified signal into the air or the wireless medium.

[0067] In NR, a UE can use discontinuous reception (DRX) in RRC IDLE state (or idle mode) or RRC INACTIVE state (or inactive mode) in order to reduce power consumption. The UE monitors one paging occasion (PO) per DRX cycle (which can also be referred to as a DRX period). The DRX cycle (or DRX period) is configured by higher layers. The DRX cycle can be a DRX long cycle and optionally a DRX short cycle. The parameter drx-StartOffset indicates the subframe in which the DRX long cycle or the DRX short cycle starts. A PO is a set of physical downlink control channel (PDCCH) monitoring occasions and can include multiple slots (e.g., subframes or orthogonal frequency-division multiplexing (OFDM) symbols) in which paging downlink control information (DCI) can be transmitted. One paging frame (PF) is one radio frame and can include one or multiple POs or the starting point of a PO.

[0068] The DRX cycle (i.e., T) for a UE in idle or inactive mode is determined by the shortest of the UE-specific DRX cycle (e.g., Tue, if it is assigned by upper layers) and the default DRX value (e.g., Tc) broadcasted in system information. For example, if Tc = 128 (in subframes) and Tue = 32, then T = min(Tc, Tue) = min(128, 32) = 32, which is assumed to be the paging period for the UE in idle or inactive mode.

[0069] N denotes the number of PFs within one DRX cycle. N is a configured number.

[0070] Ns denotes the number of POs within each PF. Ns is a configured number.

[0071] The paging frame (PF) for a specific UE (denoted by UE_ID) is given by (SFN + PF_offset) mod T = (T div N) * (UE_ID div Ns) + (UE_ID mod Ns) (UE_ID mod N) gives, where PF_offset is an offset for PF determination, and UE_ID is given by IMSI (or 5G-S-TMSI) mod 1024. For example, if IMSI = 404685505601234, then UE_ID = 404685505601234 mod 1024 = 722.

[0072] The PO for a particular UE (denoted by UE_ID) is indicated by the index i_s derived as follows: i_s = floor(UE_ID / N) mod Ns.

[0073] Figure 5 An example of PO determination is illustrated. In Figure 5 , it is assumed that Tc = 128, Tue = 32, N = 32, Ns = 4, IMSI (of the UE) = 404685505601234. Thus, DRX cycle T = min(Tc, Tue) = min(128, 32) = 32; UE_ID = 404685505601234 mod 1024 = 722; IPF (of the UE) = (SFN + PF_offset) mod T = (T div N) (UE_ID mod N) = (32 div 32) (722 mod 32) = 1 18 = 18; PO (of the UE) = floor(UE_ID / N) mod Ns = 18 mod 4 = 2. Thus, in each DRX cycle (T), there are N = 32 PFs and 32 4 = 128 POs (4 POs per PF). For the UE (IMSI = 404685505601234), starting from frame #18, every 32 frames (i.e. DRX cycle T), the UE monitors PO #2 (amongst POs #0, #1, #2 and #3) as a monitoring occasion (MO). This means that the UE will wake up every T = 32 x 10 = 320 ms to monitor for a paging message in the MO.

[0074] As can be seen, if the higher layers configure a DRX transmission, the UE needs to wake up periodically every DRX cycle, which dominates the power consumption in periods without signalling or data traffic. If the UEs could only wake up when they are triggered (e.g. when they are paged), the power consumption could be significantly reduced. This can be achieved by using a wake-up signal (WUS).

[0075] For UEs in idle or inactive mode, a wake-up signal (WUS) is introduced to save power. The WUS communicated in DCI format 2_7 indicates whether there is a paging procedure in a pre-defined PO (or MO for a specific UE) in the DRX on-duration.

[0076] DRX in RRC CONNECTED state (or connected mode) is also supported (i.e., C-DRX). For UEs in connected mode, a WUS communicated by DCI format 2_6 is also introduced to inform the UE whether to wake up to monitor PDCCH for data transmission and reception (e.g., start the DRX on-duration timer for the next DRX cycle). As shown in Figure 6 if the WUS communicated by DCI format 2_6 indicates to the UE not to wake up to monitor PDCCH for data transmission and reception (e.g., start the DRX on-duration timer for the next DRX cycle (next long DRX cycle)), the UE does not wake up (i.e., continues to sleep) in the next DRX cycle to save energy. On the other hand, if the WUS communicated by DCI format 2_6 indicates the UE to wake up to monitor PDCCH for data transmission and reception (e.g., start the DRX on-duration timer for the next DRX cycle (next long DRX cycle)), the UE wakes up in the next DRX cycle so that energy is consumed. In the time before the slot in which the DRX on-duration timer (e.g., drx-onDurationTimer) is to start on the PCell or SpCell, the UE is indicated to start monitoring PDCCH to detect DCI format 2_6 by an offset of ps-Offset (indicated as ps-Offset-r16 in Figure 6

[0077] A lower power WUS (LP-WUS) is further introduced. In addition to the main radio (MR), a separate receiver, e.g., a super low power wake-up receiver (WUR), is included in the UE. The LP-WUS is monitored by the UE by the WUR. As shown in FIG. 7(a), if the WUS (off) indicates that there is no paging procedure in the UE’s PO, the main radio (MR) in the UE is not triggered by the WUR and remains in the off state or deep sleep state. On the other hand, as shown in FIG. 7(b), if the WUS (on) indicates that there is a paging procedure in the UE’s PO, the WUR triggers the MR in the UE to the on state for data transmission and reception (e.g., for receiving paging in the PO in the DRX on-duration).

[0078] ​In addition to WUS, an early paging indication (EPI) or paging early indication (PEI) can be introduced. A UE can be informed by PEI whether it has to monitor a PO in advance of its PO. PEI can be signaled via a DCI message (e.g., DCI format 2-7) carried in PDCCH. PEI can carry sub-group information to divide UEs, which results in lower group paging rate and less false paging alerts.

[0079] The LP-WUS and the signals or channels used by the MR (e.g., PEI, paging message in PO) can be transmitted within the same frequency band (e.g., the same FR1 frequency band) and further on the same carrier in the frequency band.

[0080] The present disclosure proposes that the LP-WUS can be transmitted by a base station (e.g., gNB) and monitored and received by a UE on a first frequency band (e.g., on a first BWP of a first carrier); and the PEI and paging message in the PO can be transmitted by the base station (e.g., gNB) and monitored and received by the UE on a second frequency band (e.g., on a second BWP of a second carrier). In the following description, the LP-WUS is abbreviated as WUS. In other words, WUS appearing in the following description refers to the LP-WUS.

[0081] The first frequency band can be the same as the second frequency band.

[0082] If the first frequency band and the second frequency band are the same, the first carrier can be the same as the second carrier and / or the first BWP can be the same as the second BWP.

[0083] Due to consideration of coverage and / or gNB scheduling, preferably, the first BWP is different from the second BWP.

[0084] The WUS is configured by higher layer. The WUS configuration for a UE is transmitted to the UE by being included in system information or included in UE specific RRC signaling. The UE monitors the UE in the first frequency band (e.g., the first carrier or the first BWP in the first carrier). Based on the WUS indication (e.g., WUS on), the UE switches to receive the paging message in the second frequency band or switches to the DRX on duration to receive the control signal in the second frequency band.

[0085] The first embodiment is related to the configuration of WUS occasion.

[0086] The WUS is potentially transmitted from a base station (e.g., gNB) in a WUS occasion. The UE monitors the WUS in the WUS occasion. The WUS occasion is a duration for potential WUS transmission configured by higher layer. This means that the WUS can only be transmitted in the WUS occasion, not necessarily in every WUS occasion.

[0087] WUS timing is configured with a WUS period and a time offset. A WUS period is the time interval between each WUS timing. A WUS period can be configured as a multiple of a DRX period or a paging period (e.g., a paging frame). The time offset refers to the start or end of a WUS timing or WUS transmission to a reference time position, where the reference time position can be the start frame or start slot of a DRX period or paging timing. The start or end of a WUS timing or WUS transmission is determined by the time offset. The time offset should be sufficiently long for at least one of the following considerations: low UE power consumption, potential frequency or band switching from WUS to MR, and resynchronization with MR over multiple SSB durations.

[0088] The time offset can be configured using one of three options.

[0089] In the first option, the time offset can be divided into two parts: frame offset and additional time slot offset.

[0090] Frame offset refers to the number of frames from the reference frame to the first paging frame associated with WUS, or from the reference frame to the first frame associated with WUS, where drx-onDurationTimer will begin on the UE's PCcell, and the reference frame is the frame in which WUS was transmitted. The paging frame associated with WUS is the frame in which PO should be monitored if WUS is received. The first frame associated with WUS in which drx-onDurationTimer will begin on the UE's Pcell is the starting frame of the DRX period to be monitored if WUS is received.

[0091] Additional slot offset refers to the number of slots from the beginning of the reference frame (e.g., the first slot) to the slot in which WUS is transmitted. The additional slot offset is associated with the subcarrier spacing of the first BWP or the first carrier. This means that the actual duration of the additional slot offset varies depending on the different subcarrier spacings.

[0092] Figure 8 An example of the first option is illustrated. Figure 8 As shown, the reference frame, i.e. the frame in which WUS is transmitted, is frame 15; and the first paging frame (frames 18-29) associated with WUS is frame 18. Therefore, the frame offset is 18-15=3 frames.

[0093] The reference frame begins in slot 0; the slot in which WUS is transmitted is slot 3. Therefore, the additional slot offset is 3-0=3 slots. Note that the duration of the additional slot offset is associated with (e.g., depends on) the subcarrier spacing of BWP#1 (i.e., the first BWP).

[0094] Thus, the time offset from the WUS occasion or the start of the WUS transmission (frame 15, slot 3) to the reference time location (e.g., the first frame (or start frame) of the DRX period (frame 18)) depends on the frame offset (3 frames) and the additional slot offset (3 slots). Specifically, the first frame of the DRX period is frame 18, the reference time is frame 18-3 (i.e., frame 15); and the WUS occasion is the start of frame 15 (frame 15, slot 0) plus the additional slot offset (3 slots), i.e., frame 15, slot 3.

[0095] The first option is especially useful for long time offsets (e.g., time offsets that are on the order of frames).

[0096] In the second option, the time offset includes only a slot offset, i.e., the number of slots (e.g., N slots) from the start slot of the DRX period (e.g., the slot in which the drx-onDurationTimer will start on the Pcell) or the start slot of the paging occasion (e.g., the slot in which the paging message can be potentially transmitted) to the slot associated with the WUS (e.g., the first slot in which the WUS is transmitted or the last slot in which the WUS is transmitted). That is, the slot associated with the WUS is N slots before the reference slot. The slot offset is associated with a reference subcarrier spacing, and the reference subcarrier spacing can be the subcarrier spacing of BWP#1 in which the WUS is transmitted or the subcarrier spacing of BWP#2 in which the DRX or PO is configured or the smaller one of the subcarrier spacing of BWP#1 and the subcarrier spacing of BWP#2. The second option is especially useful for short time offsets (e.g., time offsets that are on the order of slots).

[0097] FIG. 9(a) illustrates a first example of the second option in which the subcarrier spacing of BWP#2 is smaller than the subcarrier spacing of BWP#1, e.g., the subcarrier spacing of BWP#2 is half of the subcarrier spacing of BWP#1. Thus, the time length of a slot according to the subcarrier spacing of BWP#2 is twice the time length of a slot according to the subcarrier spacing of BWP#1.

[0098] The reference slot for the starting slot of the paging occasion is slot 6 according to the subcarrier spacing of BWP #2; the first slot where the WUS is transmitted is slot 4 according to the subcarrier spacing of BWP #1. If the slot offset is associated with the subcarrier spacing of BWP #2, the first slot where the WUS is transmitted, i.e., slot 4 according to the subcarrier spacing of BWP #1, corresponds to slot 2 according to the subcarrier spacing of BWP #2 as slot 2. Thus, the slot offset associated with the subcarrier spacing of BWP #2 is 6 - 2 = 4 slots. From another perspective, when the reference slot is the starting slot of the paging occasion, i.e., slot 6 according to the subcarrier spacing of BWP #2, if the slot offset associated with the subcarrier spacing of BWP #2 is 4 slots, the slot where the WUS is transmitted is slot 2 according to the subcarrier spacing of BWP #2, which corresponds to slots 4 and 5 according to the subcarrier spacing of BWP #1. The UE shall monitor the WUS from slot 4 in the wake-up radio.

[0099] As another example, the reference slot for the starting slot of the paging occasion is slot 6 according to the subcarrier spacing of BWP #2; the ending slot where the WUS is transmitted is slot 5 according to the subcarrier spacing of BWP #1. If the slot offset is associated with the subcarrier spacing of BWP #1, the reference slot, i.e., the starting slot of the paging occasion 6 according to the subcarrier spacing of BWP #2, corresponds to slot 12 according to the subcarrier spacing of BWP #1. Thus, the slot offset associated with the subcarrier spacing of BWP #1 is 12 - 5 = 7 slots. From another perspective, the reference slot is the starting slot of the paging occasion, i.e., slot 6 according to the subcarrier spacing of BWP #2, which corresponds to slot 12 according to the subcarrier spacing of BWP #1. If the slot offset associated with the subcarrier spacing of BWP #1 is 7 slots according to the subcarrier spacing of BWP #1, the last slot where the WUS is transmitted is slot 5 (= 12 - 7) according to the subcarrier spacing of BWP #1.

[0100] FIG. 9(b) illustrates a second example of the second option, where the subcarrier spacing of BWP #1 is smaller than the subcarrier spacing of BWP #2, e.g., the subcarrier spacing of BWP #1 is half of the subcarrier spacing of BWP #2. Thus, the length of a slot according to the subcarrier spacing of BWP #1 is twice the length of a slot according to the subcarrier spacing of BWP #2.

[0101] The reference slot for the starting slot of the paging occasion is slot 12 according to the subcarrier spacing of BWP #2. The first slot in which the WUS is transmitted is slot 2 according to the subcarrier spacing of BWP #1. The ending slot in which the WUS is transmitted is slot 3 according to the subcarrier spacing of BWP #1. If the time slot offset is associated with the subcarrier spacing of BWP #1 (i.e., the smaller one of the subcarrier spacing of BWP #1 and the subcarrier spacing of BWP #2), then the reference slot, i.e., the starting slot 12 of the paging occasion according to the subcarrier spacing of BWP #2, corresponds to slot 6 according to the subcarrier spacing of BWP #1. Correspondingly, the time slot offset associated with the subcarrier spacing of BWP #1 is 6 - 2 = 4 slots. From another perspective, if the time slot offset associated with the subcarrier spacing of BWP #1 is 4 slots, and the reference slot is the starting slot of the paging occasion, i.e., slot 12 according to the subcarrier spacing of BWP #2 corresponds to slot 6 according to the subcarrier spacing of BWP #1, then the slot in which the WUS is transmitted according to the subcarrier spacing of BWP #1 is slot 2 (= 6 - 4).

[0102] On the other hand, if the time slot offset is associated with the subcarrier spacing of BWP #2 (i.e., the larger one of the subcarrier spacing of BWP #1 and the subcarrier spacing of BWP #2), then the ending slot 3 in which the WUS is transmitted according to the subcarrier spacing of BWP #1 can correspond to slot 6 or slot 7 according to the subcarrier spacing of BWP #2, because a slot according to the subcarrier spacing of BWP #1 is longer (e.g., twice) than a slot according to the subcarrier spacing of BWP #2. As shown in FIG. 9(b), if the time slot offset is associated with the subcarrier spacing of BWP #2, then it is unclear whether the time slot offset according to the subcarrier spacing of BWP #2 is 6 (= 12 - 6) slots or 5 (= 12 - 7) slots. Correspondingly, preferably, the reference subcarrier spacing is the smaller one of the subcarrier spacing of BWP #1 and the subcarrier spacing of BWP #2, i.e., the time slot offset is associated with the smaller one of the subcarrier spacing of BWP #1 and the subcarrier spacing of BWP #2.

[0103] In a third option, the time offset is selected (e.g., configured) from a set of time offsets including a plurality of time offsets, each of the plurality of time offsets being an absolute time offset value from a starting slot of a DRX period (e.g., a slot in which a drx-onDurationTimer is to start on a Pcell) or a starting slot of a paging occasion (e.g., a slot in which a paging message is potentially transmitted) to a slot associated with a WUS (e.g., a first slot in which a WUS is transmitted or a last slot in which a WUS is transmitted).

[0104] The set of time offsets is associated with a reference subcarrier spacing, which can be the subcarrier spacing of BWP#1 or the subcarrier spacing of BWP#2 or the smaller one of the subcarrier spacing of BWP#1 and the subcarrier spacing of BWP#2. For example, if the reference subcarrier spacing is 15 KHz, the set of time offsets is {1ms, 2ms, 4ms, 8ms}, while if the reference subcarrier spacing is 60 KHz, the set of time offsets is {0.25ms, 0.5ms, 1ms, 2ms}.

[0105] The second embodiment relates to WUS transmission in time domain.

[0106] The WUS transmission within a slot is configured by a starting symbol and a symbol length by using RIV (Resource Indicator Value). RIV is a value indicating the combination of starting symbol and symbol length.

[0107] The WUS transmission for paging transmission is repeated among slots with different beams. The number of repetitions is configured by higher layer.

[0108] The UE assumes that every K consecutive repetitions from repetition #1 are associated with the same beam. This means that the WUS transmission in repetition #1 to repetition #K is associated with beam #0 and repetition #K+1 to repetition #2K is associated with beam #1, and so on. K is determined by the number of repetitions. The number of actual transmitted beams (N ssb ) is determined by a higher layer parameter.

[0109] In the example of Figure 10 , the number of repetitions (or the number of repetitions) (N Rep ) is 4, i.e., the WUS transmission is in repetition #1 to repetition #4. Each repetition of the WUS is transmitted in a different slot (slot 2, 3, 4, 5 in Figure 10 ). The number of actual transmitted beams is N ssb = 2, i.e., beam #0 and beam #1. Therefore, K = N Rep / N ssb = 2. Therefore, the WUS transmission in repetition #1 to repetition #2 is associated with beam #0 (in slots 2 and 3); and the WUS transmission in repetition #3 to repetition #4 is associated with beam #1 (in slots 4 and 5).

[0110] The third embodiment relates to WUS transmission in frequency domain.

[0111] By using the RIV, the location of the WUS transmission in the frequency domain is configured with a starting PRB (e.g., a starting PRB within a configured BWP (BWP#1)) and a PRB number (which means the number of PRBs). The RIV indicates a combination of the starting PRB and the PRB number. The PRB number is constrained to a set of values (e.g., 4, 8, 16, 32).

[0112] The UE is also configured with a transmission bit or segment per OFDM symbol.

[0113] The transmission bit per OFDM symbol implicitly determines the waveform of the WUS. For example, if the transmission bit per OFDM (i.e., transmission segment) is 1, the waveform of the WUS can be a first waveform that transmits a single bit in one OFDM symbol. An example of the first waveform is OOK-1. If the transmission bit per OFDM symbol is greater than 1, the waveform of the WUS can be a second waveform that transmits M (M>1) bits in one OFDM symbol. An example of the second waveform is OOK-4. OOK stands for on-off keying.

[0114] The sequence length per bit is determined by the PRB number and the transmission bit per OFDM symbol. For example, the sequence length per bit is N 12 / M, N is the PRB number and M is the transmission bit per OFDM symbol. For example, if the PRB number is 20 and the transmission bit per OFDM symbol is 4, the sequence length per bit is 20 12 / 4 = 60.

[0115] Note that these parameters (sequence length per bit, PRB number, and transmission bit per OFDM symbol) can be derived from each other. This means that any one of these parameters can be derived from the other two of these parameters.

[0116] The WUS configuration can include the segment number per symbol (i.e., the number of segments per symbol), the symbol number (i.e., the number of symbols), the PRB number (i.e., the number of PRBs), and the sequence length per bit. Each bit corresponds to the transmission of a segment.

[0117] For coverage enhancement, repetition (e.g., 2 repetitions) in the frequency domain can be supported for the WUS transmission. This means that the WUS is transmitted repeatedly (e.g., 2) in the frequency domain. The UE is also configured to have a repetition number (e.g., 2) in the frequency domain per OFDM symbol. The sequence length per bit is further determined by the repetition number (e.g., divided by the repetition number). For example, if the PRB number is 20, the transmission bit per OFDM symbol is 4, and the repetition number in the frequency domain is 2, the sequence length per bit is 20 / 2 12 / 4 = 30.

[0118] A fourth embodiment relates to WUS generation and structure.

[0119] A WUS can be generated by various methods, e.g., MC-OOK. For example, a first waveform (e.g., OOK-1) can be used to generate a WUS, where each OFDM symbol carries one bit information of the WUS. As another example, a second waveform (e.g., OOK-4) can be used to generate a WUS, where each OFDM symbol carries multiple bits information of the WUS. For example, OOK-4 can need a DFT precoder before mapping the signal to the frequency domain.

[0120] A sequence of the WUS (e.g., OOK-1 or OOK-4) can be generated with a random QPSK sequence or a ZC sequence.

[0121] For OOK-1, one bit is sent in each OFDM symbol. This means two different states are mapped to REs, where one state modulates an “on” chip and the other state modulates an “off” chip. For example, a random QPSK sequence or a ZC sequence is mapped to REs to modulate an “on” chip in time domain, and zero is mapped to REs to modulate an “off” chip. OOK=1 means all subcarriers are modulated (can be modulated as a random QPSK, ZC sequence). OOK=0 means all SCs are zero power (from baseband perspective).

[0122] For OOK-4, M-bit on / off chips are mapped to one OFDM symbol.

[0123] A WUS needs to carry information to distinguish UEs.

[0124] In a first way, a WUS carries at least one of the following information to distinguish UEs (e.g., to distinguish UEs from different POs, UEs from different BWPs, UEs from different cells): a start slot number, a start symbol number, and a start frequency subcarrier number of a corresponding DRX or PO. The above information can be carried by a random QPSK sequence or a ZC sequence in the generation of the WUS waveform. For example, the random QPSK sequence or the ZC sequence is initialized with at least one of the start slot number, the start symbol number, and the start frequency subcarrier number of a corresponding DRX or PO (e.g., for each sequence, or for all sequences with OOK=1 concatenated chips).

[0125] If the subcarrier spacing of the first BWP and the subcarrier spacing of the second BWP are different, the number of slots, the number of symbols and the number of frequency subcarriers of the corresponding DRX or PO in the second BWP (or second carrier) are scaled to the subcarrier spacing in the first BWP (or first carrier). When the WUS is initialized, the number of slots according to the subcarrier spacing of the BWP (i.e., the first BWP) on which the WUS is transmitted is used. Therefore, the number of slots of the DRX or PO according to the subcarrier spacing of the second BWP needs to be scaled to the number of slots according to the subcarrier spacing of the first BWP, for example, by the formula of ceil{slot number / (subcarrier spacing of the second BWP / subcarrier spacing of the first BWP)}. )}. and is the numerology of the subcarrier spacing of the second BWP and the first BWP, where the numerology of the carrier spacing 15 kHz, 30 kHz, 60 kHz, 120 kHz and 240 kHz is 0, 1, 2, 3, 3 and 4, respectively.

[0126] For example, the pseudo-random sequence is defined by a Gold sequence of length-31. The output sequence c(n) is defined by .

[0127] The initialization of the second m-sequence x2 is represented by .

[0128] The initialization of the sequence is determined by nf_start_PO is the first frame of the first PO associated with the NWUS, ns_start_PO is the first slot of the first PO associated with the NWUS, and is the lowest subcarrier of the first PO associated with the NWUS.

[0129] In the second way, in order to support the fallback mechanism of WUS and PEI in NR Release 16 and 17, the WUS can alternatively carry UE-specific information, for example, RNTI information configured to the UE, such as ps-rnti or pei-rnti, and / or a location indication corresponding to a control signal configured by a higher layer, such as ps-positioning, to distinguish UEs. For example, the UE is configured with ps-rnti or pei-rnti and ps-positioning. At least one of ps-rnti or pei-rnti and ps-positioning is used to initialize a random QPSK sequence or a ZC sequence.

[0130] In a third approach, a WUS can be generated with coded bits with CRC. The coded bits are scrambled by a scrambling sequence. The scrambling sequence is determined by at least one of a starting slot number, a starting symbol number, and a starting frequency subcarrier number of a corresponding DRX or PO. The slot number, the symbol number, and the frequency subcarrier number are scaled to a subcarrier spacing in a first BWP (or a first carrier). Alternatively, the scrambling sequence is determined by RNTI information (e.g., ps-rnti or pei-rnti) configured to the UE and / or a location indication (e.g., ps-positioning) corresponding to a control signal configured by higher layers.

[0131] Optionally, the first waveform (e.g., OOK-1) or the second waveform (e.g., OOK-4) is determined by a payload size (a configured number of subgroups or a number of associated POs) and a threshold. For example, if the payload size (a configured number of subgroups or a number of associated POs) is less than the threshold, the waveform of OOK-1 is employed; and if the payload size is equal to or greater than the threshold, the waveform of OOK-4 is employed.

[0132] Further optionally, the waveform of OOK-1 or OOK-4 is determined by a UE connection mode (e.g., a connected mode or an idle or inactive mode). For example, if the UE is in the idle or inactive mode, the waveform of OOK-4 is employed; and if the UE is in the connected mode, the waveform of OOK-1 is employed.

[0133] Note that a payload size of a WUS for idle paging can be greater than a payload size of a WUS for C-DRX (i.e., DRX in a connected mode).

[0134] A WUS power is determined by higher layers. Specifically, the WUS power can be configured as an offset to a power of an SSB (e.g., an SSB associated with an LP-WUS configuration or an SSB for UE initial access to a cell, such as BWP#1), or an offset to a power of a CSI-RS reference signal (e.g., in BWP#1 where the LP-WUS is transmitted).

[0135] In some aspects, items regarding a UE as examples of the disclosure can be summarized as follows:

[0136] 1. A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a WUS configuration in system information or UE-specific RRC signaling; monitor for a WUS in a first frequency band; and switch based on the WUS to receive a paging message in a second frequency band or to a DRX on duration to receive a control signal in the second frequency band.

[0137] In some embodiments, the at least one processor is configured to cause the UE to monitor for the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0138] In some embodiments, the WUS period is configured as a number of times of a DRX period or a paging period.

[0139] In some embodiments, the time offset includes a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a reference frame to a first paging frame of paging frames associated with the WUS or to a start frame associated with the WUS, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is monitored.

[0140] In some embodiments, the additional slot offset is associated with a subcarrier spacing of the first frequency band.

[0141] In some embodiments, the time offset includes a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of a DRX on duration or a paging occasion.

[0142] In some embodiments, the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0143] In some embodiments, the time offset includes an absolute time offset to a start of the DRX on duration or the paging occasion.

[0144] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0145] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0146] In some embodiments, the WUS is transmitted in time domain with a configured repetition.

[0147] In some embodiments, a first number of consecutive repetitions is associated with a particular beam.

[0148] In some embodiments, the first number is determined by an actual transmit beam and a total number of repetitions.

[0149] In some embodiments, the WUS is transmitted in frequency domain with a configuration of an RIV indicating a start PRB and a PRB number.

[0150] In some embodiments, the PRB number is from a limited set.

[0151] In some embodiments, the WUS is associated with one or more waveforms.

[0152] In some embodiments, a waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0153] In some embodiments, a length of the sequence is determined by a number of PRBs and a segment or a transmission bit of each symbol.

[0154] In some embodiments, a transmission bit of each symbol or a segment of a symbol is configured in the WUS configuration.

[0155] In some embodiments, the WUS is transmitted in a configured repetition in a frequency domain.

[0156] In some embodiments, a length of the sequence is determined by a number of PRBs, a transmission bit of each symbol or a segment of each symbol, and a number of repetitions in the frequency domain.

[0157] In some embodiments, a sequence of each transmission bit or a plurality of transmission bits is initialized by at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0158] In some embodiments, the WUS carries information for distinguishing UEs.

[0159] In some embodiments, the WUS carries information of at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0160] Optionally, the WUS carries information of an RNTI and / or a location indication corresponding to a control signal configured by a higher layer.

[0161] In some embodiments, the WUS is generated from encoded bits with a CRC.

[0162] In some embodiments, the encoded bits are scrambled by a scrambling sequence.

[0163] In some embodiments, the scrambling sequence is initialized by at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0164] In some embodiments, a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS in a second frequency band are scaled to a subcarrier spacing in a first frequency band.

[0165] In some embodiments, a waveform of the WUS is determined by a payload size of the WUS, a number of subgroups of the PO or the DRX, a number of associated POs of the WUS, or a connection mode of the UE.

[0166] A processor in a UE for wireless communication, comprising at least one controller coupled with at least one memory and configured to cause the processor to: receive a WUS configuration in system information or UE-specific RRC signaling; monitor for a WUS in a first frequency band; and switch based on the WUS to receive a paging message in a second frequency band or to a DRX ON duration to receive a control signal in the second frequency band.

[0167] In some embodiments, the at least one controller is configured to cause the processor to: monitor for the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0168] In some embodiments, the WUS period is configured as a multiple of a DRX period or a paging period.

[0169] In some embodiments, the time offset includes a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a reference frame to a first paging frame of a paging frame associated with the WUS or to a start frame associated with the WUS, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is monitored.

[0170] In some embodiments, the additional slot offset is associated with a subcarrier spacing of the first frequency band.

[0171] In some embodiments, the time offset includes a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of a DRX ON duration or a paging occasion.

[0172] In some embodiments, the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0173] In some embodiments, the time offset includes an absolute time offset to a start of the DRX ON duration or the paging occasion.

[0174] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0175] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0176] In some embodiments, the WUS is transmitted in time domain with a configured repetition.

[0177] In some embodiments, a first number of consecutive repetitions is associated with a particular beam.

[0178] In some embodiments, the first number is determined by the actual transmit beams and the total number of repetitions.

[0179] In some embodiments, the WUS is transmitted in the frequency domain with a configuration of RIV indicating a starting PRB and a PRB number.

[0180] In some embodiments, the PRB number is from a limited set.

[0181] In some embodiments, the WUS is associated with one or more waveforms.

[0182] In some embodiments, the waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0183] In some embodiments, the length of the sequence is determined by the number of PRBs and the segment of each symbol or the transmission bit.

[0184] In some embodiments, the transmission bit of each symbol or the segment of a symbol is configured in the WUS configuration.

[0185] In some embodiments, the WUS is transmitted in the frequency domain with a configured repetition.

[0186] In some embodiments, the length of the sequence is determined by the number of PRBs, the transmission bit of each symbol or the segment of each symbol, and the number of repetitions in the frequency domain.

[0187] In some embodiments, the sequence of each transmission bit or multiple transmission bits is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on duration associated with the WUS.

[0188] In some embodiments, the WUS carries information for distinguishing UEs.

[0189] In some embodiments, the WUS carries information of at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on duration associated with the WUS.

[0190] Optionally, the WUS carries information of the RNTI and / or the location indication corresponding to the control signal configured by the higher layer.

[0191] In some embodiments, the WUS is generated from encoded bits with CRC.

[0192] In some embodiments, the encoded bits are scrambled by a scrambling sequence.

[0193] In some embodiments, the scrambling sequence is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on duration associated with the WUS.

[0194] In some embodiments, a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a start of a DRX on-duration associated with the WUS in the second frequency band is scaled to a subcarrier spacing in the first frequency band.

[0195] In some embodiments, a waveform of the WUS is determined by a payload size of the WUS, a number of subgroups of the PO or the DRX, a number of associated POs of the WUS, or a UE connected mode.

[0196] A method performed by a user equipment (UE), the method comprising: receiving a WUS configuration in system information or UE specific RRC signaling; receiving the WUS configuration in system information or UE specific RRC signaling; monitoring for a WUS in a first frequency band; and switching based on the WUS to receive a paging message in a second frequency band or to a DRX on-duration to receive a control signal in the second frequency band.

[0197] In some embodiments, the method comprises monitoring for the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0198] In some embodiments, the WUS period is configured as a number of times of a DRX period or a paging period.

[0199] In some embodiments, the time offset comprises a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a reference frame to a first paging frame associated with the WUS or to a start frame associated with the WUS of a DRX on-duration timer, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is monitored.

[0200] In some embodiments, the additional slot offset is associated with a subcarrier spacing of the first frequency band.

[0201] In some embodiments, the time offset comprises a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of the DRX on-duration or the paging occasion.

[0202] In some embodiments, the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0203] In some embodiments, the time offset comprises an absolute time offset to a start of the DRX on-duration or the paging occasion.

[0204] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0205] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0206] In some embodiments, the WUS is transmitted in time domain with configured repetitions.

[0207] In some embodiments, the first number of consecutive repetitions is associated with a particular beam.

[0208] In some embodiments, the first number is determined by the actual transmitted beam and the total number of repetitions.

[0209] In some embodiments, the WUS is transmitted in frequency domain with a configuration of RIV indicating a starting PRB and a PRB number.

[0210] In some embodiments, the PRB number is from a limited set.

[0211] In some embodiments, the WUS is associated with one or more waveforms.

[0212] In some embodiments, the waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0213] In some embodiments, the length of the sequence is determined by the number of PRBs and the segment of each symbol or the transmission bit.

[0214] In some embodiments, the transmission bit of each symbol or the segment of a symbol is configured in the WUS configuration.

[0215] In some embodiments, the WUS is transmitted in frequency domain with configured repetitions.

[0216] In some embodiments, the length of the sequence is determined by the number of PRBs, the transmission bit of each symbol or the segment of each symbol, and the number of repetitions in the frequency domain.

[0217] In some embodiments, the sequence of each transmission bit or multiple transmission bits is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on duration associated with the WUS.

[0218] In some embodiments, the WUS carries information for distinguishing UEs.

[0219] In some embodiments, the WUS carries information of at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on duration associated with the WUS.

[0220] Optionally, the WUS carries information of RNTI and / or location indication corresponding to the high-layer configured control signal.

[0221] In some embodiments, the WUS is generated from encoding bits with a CRC.

[0222] In some embodiments, the encoding bits are scrambled by a scrambling sequence.

[0223] In some embodiments, the scrambling sequence is initialized by at least one of a slot number, a symbol number, a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0224] In some embodiments, the slot number, the symbol number, and the frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS in a second frequency band are scaled to subcarrier spacing in a first frequency band.

[0225] In some embodiments, a waveform of the WUS is determined by a payload size of the WUS, a number of subgroups of POs or DRX, a number of associated POs of the WUS, or a UE connected mode.

[0226] In some aspects, items regarding a base station as examples of the disclosure can be generalized as follows:

[0227] A base station for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: transmit a WUS configuration in system information or UE-specific RRC signaling; transmit a WUS in a first frequency band; and transmit a paging message or a control signal in a second frequency band based on the WUS indication.

[0228] In some embodiments, the at least one processor is configured to cause the base station to: transmit the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0229] In some embodiments, the WUS period is configured as a number of times of a DRX period or a paging period.

[0230] In some embodiments, the time offset includes a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a first frame of a reference frame to a first paging frame associated with the WUS or to a start frame associated with the WUS of a DRX on-duration timer, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is transmitted.

[0231] In some embodiments, the additional slot offset is associated with a subcarrier spacing of the first frequency band.

[0232] In some embodiments, the time offset includes a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot of monitoring the WUS to a start slot of a DRX on-duration or a paging occasion.

[0233] In some embodiments, the time slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0234] In some embodiments, the time offset includes an absolute time offset to a start of a DRX ON duration or a paging occasion.

[0235] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0236] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0237] In some embodiments, the WUS is transmitted in time domain with a configured repetition.

[0238] In some embodiments, a first number of consecutive repetitions is associated with a particular beam.

[0239] In some embodiments, the first number is determined by an actual transmit beam and a total number of repetitions.

[0240] In some embodiments, the WUS is transmitted in frequency domain with a configuration of a RIV indicating a start PRB and a PRB number.

[0241] In some embodiments, the PRB number is from a finite set.

[0242] In some embodiments, the WUS is associated with one or more waveforms.

[0243] In some embodiments, a waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0244] In some embodiments, a length of the sequence is determined by a number of PRBs and a segment of each symbol or a transmission bit.

[0245] In some embodiments, a transmission bit of each symbol or a segment of a symbol is configured in the WUS configuration.

[0246] In some embodiments, the WUS is transmitted in frequency domain with a configured repetition.

[0247] In some embodiments, a length of the sequence is determined by a number of PRBs, a transmission bit of each symbol or a segment of each symbol, and a number of repetitions in frequency domain.

[0248] In some embodiments, a sequence of each transmission bit or multiple transmission bits is initialized by at least one of a time slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX ON duration associated with the WUS.

[0249] In some embodiments, the WUS carries information for distinguishing UEs.

[0250] In some embodiments, the WUS carries information of at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0251] Optionally, the WUS carries information of an RNTI and / or a location indication corresponding to a high layer configured control signal.

[0252] In some embodiments, the WUS is generated from encoded bits with a CRC.

[0253] In some embodiments, the encoded bits are scrambled by a scrambling sequence.

[0254] In some embodiments, the scrambling sequence is initialized by at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

[0255] In some embodiments, at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS in a second frequency band is scaled to a subcarrier spacing in a first frequency band.

[0256] In some embodiments, a waveform of the WUS is determined by a payload size of the WUS, a number of subgroups of POs or DRX, a number of associated POs of the WUS, or a UE connection mode.

[0257] A processor in a base station for wireless communication, comprising at least one controller coupled with at least one memory and configured to cause the processor to: transmit a WUS configuration in system information or UE specific RRC signaling; transmit a WUS in a first frequency band; and transmit a paging message or a control signal in a second frequency band based on the WUS indication.

[0258] In some embodiments, the at least one controller is configured to cause the processor to: transmit the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0259] In some embodiments, the WUS period is configured as a number of times of a DRX period or a paging period.

[0260] In some embodiments, the time offset includes a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a reference frame to a first paging frame associated with the WUS or to a start frame associated with the WUS of a start of a DRX on-duration, and the additional slot offset is a number of slots from a first slot or a start of the reference frame to a slot in which the WUS is transmitted.

[0261] In some embodiments, the additional time offset is associated with a subcarrier spacing of the first frequency band.

[0262] In some embodiments, the time offset comprises a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot of the WUS to a start slot of the DRX on duration or the paging occasion.

[0263] In some embodiments, the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0264] In some embodiments, the time offset comprises an absolute time offset to a start of the DRX on duration or the paging occasion.

[0265] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0266] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0267] In some embodiments, the WUS is transmitted in time domain with a configured repetition.

[0268] In some embodiments, the first number of consecutive repetitions is associated with a particular beam.

[0269] In some embodiments, the first number is determined by an actual transmit beam and a total number of repetitions.

[0270] In some embodiments, the WUS is transmitted in frequency domain with a configuration of a RIV indicating a start PRB and a PRB number.

[0271] In some embodiments, the PRB number is from a finite set.

[0272] In some embodiments, the WUS is associated with one or more waveforms.

[0273] In some embodiments, a waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0274] In some embodiments, a length of the sequence is determined by a number of PRBs and a segment of each symbol or a transmission bit.

[0275] In some embodiments, the transmission bit of each symbol or the segment of a symbol is configured in the WUS configuration.

[0276] In some embodiments, the WUS is transmitted in frequency domain with a configured repetition.

[0277] In some embodiments, the length of the sequence is determined by the number of PRBs, the number of transmission bits per symbol or segments per symbol, and the number of repetitions in the frequency domain.

[0278] In some embodiments, the sequence of each transmission bit or multiple transmission bits is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0279] In some embodiments, the WUS carries information for distinguishing UEs.

[0280] In some embodiments, the WUS carries information of at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0281] Optionally, the WUS carries information of the RNTI and / or the location indication corresponding to the high-layer configured control signal.

[0282] In some embodiments, the WUS is generated from encoded bits with CRC.

[0283] In some embodiments, the encoded bits are scrambled by a scrambling sequence.

[0284] In some embodiments, the scrambling sequence is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0285] In some embodiments, the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS in the second frequency band are scaled to the subcarrier spacing in the first frequency band.

[0286] In some embodiments, the waveform of the WUS is determined by the payload size of the WUS, the number of subgroups of POs or DRX, the number of associated POs of the WUS, or the connection mode of the UE.

[0287] A method performed by a base station, the method comprising: transmitting a WUS configuration in system information or UE-specific RRC signaling; transmitting a WUS in a first frequency band; and transmitting a paging message or a control signal in a second frequency band based on the WUS indication.

[0288] In some embodiments, the method comprises monitoring for a WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

[0289] In some embodiments, the WUS period is configured as a multiple of a DRX period or a paging period.

[0290] In some embodiments, the time offset includes a frame offset and an additional slot offset, where the frame offset is a number of frames from a reference frame to a first paging frame associated with the WUS or to a start frame associated with the WUS at the beginning of the DRX on duration timer, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is transmitted.

[0291] In some embodiments, the additional slot offset is associated with a subcarrier spacing of the first frequency band.

[0292] In some embodiments, the time offset includes a slot offset, where the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of the DRX on duration or the paging occasion.

[0293] In some embodiments, the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

[0294] In some embodiments, the time offset includes an absolute time offset to a start of the DRX on duration or the paging occasion.

[0295] In some embodiments, the absolute time offset is selected from a set of time offsets.

[0296] In some embodiments, the set of time offsets is associated with a reference subcarrier spacing.

[0297] In some embodiments, the WUS is transmitted in time domain with a configured repetition.

[0298] In some embodiments, a first number of consecutive repetitions is associated with a particular beam.

[0299] In some embodiments, the first number is determined by an actual transmit beam and a total number of repetitions.

[0300] In some embodiments, the WUS is transmitted in frequency domain with a configuration of an RIV indicating a start PRB and a PRB number.

[0301] In some embodiments, the PRB number is from a limited set.

[0302] In some embodiments, the WUS is associated with one or more waveforms.

[0303] In some embodiments, a waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

[0304] In some embodiments, a length of the sequence is determined by a number of PRBs and a segment or a transmission bit of each symbol.

[0305] In some embodiments, transmission bits per symbol or segments of symbol are configured in the WUS configuration.

[0306] In some embodiments, the WUS is transmitted in the frequency domain with configured repetitions.

[0307] In some embodiments, the length of the sequence is determined by the number of PRBs, transmission bits per symbol or segments of symbol, and the number of repetitions in the frequency domain.

[0308] In some embodiments, the sequence of transmission bits or multiple transmission bits is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0309] In some embodiments, the WUS carries information for distinguishing UEs.

[0310] In some embodiments, the WUS carries information of at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0311] Optionally, the WUS carries information of RNTI and / or location indication corresponding to a high layer configured control signal.

[0312] In some embodiments, the WUS is generated from encoded bits with CRC.

[0313] In some embodiments, the encoded bits are scrambled by a scrambling sequence.

[0314] In some embodiments, the scrambling sequence is initialized by at least one of the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS.

[0315] In some embodiments, the slot number, the symbol number, and the frequency subcarrier number of the start of the paging occasion or the DRX on-duration associated with the WUS in the second frequency band are scaled to subcarrier spacing in the first frequency band.

[0316] In some embodiments, the waveform of the WUS is determined by the payload size of the WUS, the number of subgroups of POs or DRX, the number of associated POs of the WUS, or the UE connection mode.

[0317] Figure 11 A flow diagram illustrating the method 1100 in accordance with aspects of the present disclosure is shown. The operations of the method can be implemented by a UE as described herein. In some implementations, a UE can execute a set of instructions to control the functional elements of the UE to perform the described functions.

[0318] At 1102, a WUS configuration is received in system information or UE specific RRC signaling.

[0319] At 1104, a WUS is monitored in the first frequency band.

[0320] At 1106, based on the WUS indication, switching to receive a paging message in a second frequency band or switching to a DRX ON duration to receive a control signal in the second frequency band.

[0321] Figure 12 A flow diagram illustrating a method 1200 is shown in accordance with aspects of the present disclosure. Operations of the method can be implemented by an NE as described herein. In some implementations, the NE can execute a set of instructions to control the functional elements of the NE to perform the described functions.

[0322] At 1202, a WUS configuration is transmitted in system information or UE specific RRC signaling.

[0323] At 1204, a WUS is transmitted in the first frequency band.

[0324] At 1206, based on the WUS indication, a paging message or a control signal is transmitted in a second frequency band.

[0325] It should be noted that the methods described herein describe possible implementations, and that the operations and the steps can be rearranged or otherwise modified and that other implementations are possible.

[0326] The description herein is presented to enable a person of ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not to be limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a WUS configuration in system information or UE-specific RRC signaling; monitor for a WUS in a first frequency band; and based on the WUS indication, switch to receive a paging message in a second frequency band or switch to a DRX ON duration to receive a control signal in the second frequency band.

2. The UE of claim 1, wherein, the at least one processor is configured to cause the UE to: monitor for the WUS in a WUS occasion, wherein the WUS occasion is configured with a WUS period and a time offset.

3. The UE of claim 2, wherein the WUS period is configured as a multiple of a DRX period or a paging period.

4. The UE of claim 2, wherein the time offset includes a frame offset and an additional slot offset, wherein the frame offset is a number of frames from a reference frame to a first paging frame of a paging frame associated with the WUS or to a start frame associated with the WUS of a DRX ON duration timer, and the additional slot offset is a number of slots from a first slot or start of the reference frame to a slot in which the WUS is monitored.

5. The UE of claim 2, wherein the time offset includes a slot offset, wherein the slot offset is a number of slots from a start slot or an end slot in which the WUS is monitored to a start slot of a DRX ON duration or a paging occasion.

6. The UE of claim 5, wherein the slot offset is associated with a subcarrier spacing of the first frequency band, or a subcarrier spacing of the second frequency band, or a smaller one of the subcarrier spacing of the first frequency band and the subcarrier spacing of the second frequency band.

7. The UE of claim 2, wherein the time offset includes an absolute time offset to a start of a DRX ON duration or a paging occasion.

8. The UE of claim 1, wherein the WUS is transmitted with a configured repetition in time domain.

9. The UE of claim 8, wherein a first number of consecutive repetitions is associated with a particular beam.

10. The UE of claim 1, wherein the WUS is associated with one or more waveforms.

11. The UE of claim 10, wherein a waveform of the WUS is associated with each segment of a symbol or a sequence of each transmission bit.

12. The UE of claim 11, wherein a length of the sequence is determined by a number of PRBs and segments or transmission bits per symbol.

13. The UE of claim 1, wherein the WUS is transmitted with a configured repetition in frequency domain.

14. The UE of claim 1, wherein the WUS carries information to distinguish UEs.

15. The UE of claim 14, wherein the WUS carries information of at least one of a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX ON duration associated with the WUS, or The WUS carries RNTI and / or location indicated information corresponding to higher layer configured control signals, or The WUS is generated from encoded bits with CRC, the encoded bits are scrambled by a scrambling sequence, and the scrambling sequence is initialized by at least one of a slot number, a symbol number, a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS.

16. The UE of claim 15, wherein a slot number, a symbol number, and a frequency subcarrier number of a start of a paging occasion or a DRX on-duration associated with the WUS in the second frequency band are scaled to subcarrier spacing in the first frequency band.

17. The UE of claim 10, wherein a waveform of a WUS is determined by a payload size of the WUS, a number of subgroups of POs or DRX, a number of associated POs of the WUS, or a UE connected mode.

18. A processor in a UE for wireless communication, comprising: at least one controller coupled with the at least one memory and configured as the processor to: receive a WUS configuration in system information or UE specific RRC signaling; monitor for a WUS in a first frequency band; switch to receive a paging message in a second frequency band or switch to a DRX on-duration to receive a control signal in the second frequency band based on a WUS indication.

19. A method performed by a user equipment (UE), the method comprising: receiving a WUS configuration in system information or UE specific RRC signaling; monitoring for a WUS in a first frequency band; and switching to receive a paging message in a second frequency band or switching to a DRX on-duration to receive a control signal in the second frequency band based on a WUS indication.

20. A base station for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the base station to: send a WUS configuration in system information or UE specific RRC signaling; send a WUS in a first frequency band; and send a paging message or a control signal in a second frequency band based on a WUS indication.

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