Low power WUS activation and deactivation configuration

Abstract

Aspects of the present disclosure relate to methods, apparatuses, and systems for supporting WUS activation and deactivation configurations. Some implementations of the methods and apparatus described herein may 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, in a primary radio (MR), a configuration of a lower power wake-up signal (LP-WUS) to be transmitted in a lower power wake-up radio (LP-WUR); and switching between operation in the MR and operation in the LP-WUR according to an explicit indication or a preconfigured condition.

Description

Technical Field

[0001] This disclosure relates to wireless communication, and more specifically to wake-up signal (WUS) activation and deactivation configuration. Background Technology

[0002] A wireless communication system may include one or more network communication devices, such as base stations, which may also be referred to as eNodeB (eNB), next-generation NodeB (gNB), or other suitable terms. Each network communication device (such as a base station) may support wireless communication for one or more user communication devices (which may also be referred to as user equipment (UE), or other suitable terms). The wireless communication system may support wireless communication with one or more user communication devices by utilizing the resources of the wireless communication system (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)). In addition, the wireless communication system may support wireless communication across a variety of radio access technologies, including third-generation (3G), fourth-generation (4G), fifth-generation (5G), and other suitable radio access technologies other than 5G (e.g., sixth-generation (6G)). Summary of the Invention

[0003] The word "a" preceding an element is not limited and is understood to mean "at least one" or "one or more" of those elements. The terms "a," "at least one," "one or more," and "at least one of one or more" may be used interchangeably. As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with phrases such as "at least one of," "one or more of," or "one or two of") indicates an inclusive list, such that a list of, for example, at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on." Additionally, as used herein (including in the claims), "set" may include one or more elements.

[0004] This disclosure relates to methods, apparatus, and systems for supporting low-power WUS activation and deactivation.

[0005] Some implementations of the methods and apparatus described herein may further include a user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled to the at least one memory and configured such that the UE: receives in the main radio (MR) a configuration for transmitting a low-power wake-up signal (LP-WUS) in a low-power wake-up radio (LP-WUR); and switches between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configuration conditions.

[0006] Some implementations of the methods and apparatus described herein may include a processor in a UE for wireless communication, the processor comprising: at least one controller coupled to at least one memory and configured such that the processor: receives in the main radio (MR) a configuration for transmitting a low-power wake-up signal (LP-WUS) in a low-power wake-up radio (LP-WUR); and switches between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0007] Some implementations of the methods and apparatus described herein may include a method performed by a user equipment (UE) comprising: receiving in the main radio (MR) a configuration for transmitting a low-power wake-up signal (LP-WUS) in a low-power wake-up radio (LP-WUR); and switching between operation in the MR and operation in the LP-WUR according to explicit indications or pre-configuration conditions.

[0008] In some implementations of the methods and apparatus described herein, switching between operations in MR and LP-WUR includes: (1) Activate LP-WUS monitoring in the first frequency band in LP-WUR. (2) Deactivate LP-WUS monitoring in the first frequency band in LP-WUR. (3) Switching between monitoring the LP-WUS in the first frequency band in LP-WUR and monitoring the control signal in the second frequency band in MR, or Any combination of (1), (2) and (3).

[0009] In some implementations of the methods and apparatus described herein, explicit indications are included in system information and / or RRC signaling.

[0010] In some implementations of the methods and apparatus described herein, explicit indications are included in system information and / or RRC signaling.

[0011] In some implementations of the methods and apparatus described herein, an explicit indication is made to instruct the UE to switch from MR to LP-WUR, and the explicit indication is either an RRC connection release message or is included in an RRC connection release message.

[0012] In some implementations of the methods and apparatus described herein, the gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins from the receipt of the RRC connection release message or from when the UE has switched from connected mode to idle or inactive mode, and the UE switches from MR to LP-WUR after the gap duration.

[0013] In some implementations of the methods and apparatus described herein, the gap duration ends after the UE detects a paging opportunity that does not include a paging message for the UE.

[0014] In some implementations of the methods and apparatus described herein, the duration of the gap is determined by the relationship between the first frequency band and the second frequency band, or by the subcarrier spacing of the first frequency band and / or the subcarrier spacing of the second frequency band, or by a higher layer configuration, or some combination thereof.

[0015] In some implementations of the methods and apparatus described herein, an explicit indication is given to the UE to switch from MR to LP-WUR, and the explicit indication is included in the RRC configuration message.

[0016] In some implementations of the methods and apparatus described herein, the gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins from the reception of the RRC configuration message or from the transmission of HARQ feedback for the reception of the RRC configuration message, and the UE switches from MR to LP-WUR after the gap duration.

[0017] In some implementations of the methods and apparatus described herein, an explicit indication instructing the UE to switch from MR to LP-WUR is included in the SCell activation trigger message or SCell configuration, and an explicit indication instructing the UE to switch from LP-WUR to MR is included in the SCell deactivation trigger message or SCell deactivation configuration.

[0018] In some implementations of the methods and apparatus described herein, an explicit indication is given to the UE to switch from MR to LP-WUR, and the explicit indication is included in the control signal.

[0019] In some implementations of the methods and apparatus described herein, one or more LP-WUS activation fields are included in the control signal.

[0020] In some implementations of the methods and apparatus described herein, the LP-WUS activation field and the corresponding wake-up signal indication field jointly indicate the switch from MR to LP-WUR.

[0021] In some implementations of the methods and apparatus described herein, the LP-WUS activation field is in a paging short message with a control signal having a CRC scrambled by P-RNTI.

[0022] In some implementations of the methods and apparatus described herein, specific states of the paging indication field and the TRS availability indication field in the control signal indicate a switch from MR to LP-WUR.

[0023] In some implementations of the methods and apparatus described herein, an explicit indication is given to the UE to switch from LP-WUR to MR, and the explicit indication is included in LP-SS or LP-WUS or a combination of LP-SS and LP-WUS, wherein both LP-SS and LP-WUS are transmitted in LP-WUR.

[0024] In some implementations of the methods and apparatus described herein, the pre-configuration condition is that the measured value is greater than or less than a threshold.

[0025] In some implementations of the methods and apparatus described herein, the threshold is configured by a higher layer.

[0026] In some implementations of the methods and apparatus described herein, if the measured value is greater than a threshold, the UE switches from MR to WUR after the interval duration from the start of the reported measured value.

[0027] In some implementations of the methods and apparatus described herein, the pre-configuration condition is that a timer remaining in the MR or a timer remaining in the LP-WUR expires.

[0028] In some implementations of the methods and apparatus described herein, the timer residing in the MR or the timer residing in the LP-WUR starts from the reference time.

[0029] In some implementations of the methods and apparatus described herein, the reference time for the timer remaining in the MR includes: the time when the UE switches from the LP-WUR to the MR, and the time when the UE switches from the connected mode to the idle or inactive mode; and the reference time for the timer remaining in the LP-WUR includes: the time when the UE switches from the MR to the LP-WUR, the time when the UE switches from the connected mode to the idle or inactive mode, and the time when the UE switches from the idle or inactive mode to the connected mode.

[0030] In some implementations of the methods and apparatus described herein, the pre-configuration condition is a periodic switch from LP-WUR to MR starting from a start time, where the period is configured by a higher layer.

[0031] In some implementations of the methods and apparatus described herein, the start time of the cycle includes: the UE switching from connected mode to inactive or idle mode, the UE switching from MR to LP-WUR for the first time, or an absolute time slot.

[0032] In some implementations of the methods and apparatus described herein, at least one processor is further configured such that the UE reports a handover via RACH or Small Data Transmission (SDT), wherein the RACH or SDT resources are specifically configured.

[0033] Some implementations of the methods and apparatus described herein may include: at least one memory; and at least one processor coupled to the at least one memory and configured to cause the base station to: transmit a low-power wake-up signal (LP-WUS) to be transmitted in a low-power wake-up radio (LP-WUR) in the main radio (MR); and switch between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0034] Some implementations of the methods and apparatus described herein may include a processor in a base station for wireless communication, comprising: at least one controller coupled to at least one memory and configured such that the processor: is configured to transmit a low-power wake-up signal (LP-WUS) in a main radio (MR) to be transmitted in a low-power wake-up radio (LP-WUR); and switches between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0035] Some implementations of the methods and apparatus described herein may include a method performed by a base station, comprising: configuring the transmission in the main radio (MR) of a lower power wake-up signal (LP-WUS) to be transmitted in the lower power wake-up radio (LP-WUR); and switching between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0036] In some implementations of the methods and apparatus described herein, switching between operations in MR and LP-WUR includes: (1) Activate LP-WUS monitoring in the first frequency band in LP-WUR. (2) Deactivate LP-WUS monitoring in the first frequency band in LP-WUR. (3) Switching between monitoring the LP-WUS in the first frequency band in LP-WUR and monitoring the control signal in the second frequency band in MR, or Any combination of (1), (2) and (3).

[0037] In some implementations of the methods and apparatus described herein, explicit indications are included in system information and / or RRC signaling.

[0038] In some implementations of the methods and apparatus described herein, explicit indications are included in system information and / or RRC signaling.

[0039] In some implementations of the methods and apparatus described herein, an explicit indication is made to indicate that the base station is switching from MR to LP-WUR, and the explicit indication is either an RRC connection release message or is included in an RRC connection release message.

[0040] In some implementations of the methods and apparatus described herein, the gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins from the receipt of the RRC connection release message or from when the base station has switched from connected mode to idle or inactive mode, and the base station switches from MR to LP-WUR after the gap duration.

[0041] In some implementations of the methods and apparatus described herein, the duration of the gap is determined by the relationship between the first frequency band and the second frequency band, or by the subcarrier spacing of the first frequency band and / or the subcarrier spacing of the second frequency band, or by a higher layer configuration, or some combination thereof.

[0042] In some implementations of the methods and apparatus described herein, an explicit indication is given to the base station to switch from MR to LP-WUR, and the explicit indication is included in the RRC configuration message.

[0043] In some implementations of the methods and apparatus described herein, the gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins with the reception of an RRC configuration message or with the transmission of a HARQ feedback for the reception of an RRC configuration message, and the base station switches from MR to LP-WUR after the gap duration.

[0044] In some implementations of the methods and apparatus described herein, an explicit indication instructing a base station to switch from MR to LP-WUR is included in the SCell activation trigger message or SCell configuration, and an explicit indication instructing a base station to switch from LP-WUR to MR is included in the SCell deactivation trigger message or SCell deactivation configuration.

[0045] In some implementations of the methods and apparatus described herein, an explicit indication is given to the base station to switch from MR to LP-WUR, and the explicit indication is included in the control signal.

[0046] In some implementations of the methods and apparatus described herein, one or more LP-WUS activation fields are included in the control signal.

[0047] In some implementations of the methods and apparatus described herein, the LP-WUS activation field and the corresponding wake-up signal indication field jointly indicate the switch from MR to LP-WUR.

[0048] In some implementations of the methods and apparatus described herein, the LP-WUS activation field is in a paging short message with a control signal having a CRC scrambled by P-RNTI.

[0049] In some implementations of the methods and apparatus described herein, specific states of the paging indication field and the TRS availability indication field in the control signal indicate a switch from MR to LP-WUR.

[0050] In some implementations of the methods and apparatus described herein, an explicit indication is given to the base station to switch from LP-WUR to MR, and the explicit indication is included in LP-SS or LP-WUS or a combination of LP-SS and LP-WUS, wherein both LP-SS and LP-WUS are transmitted in LP-WUR.

[0051] In some implementations of the methods and apparatus described herein, the pre-configuration condition is that the measured value is greater than or less than a threshold.

[0052] In some implementations of the methods and apparatus described herein, the threshold is configured by a higher layer.

[0053] In some implementations of the methods and apparatus described herein, if the measured value is greater than a threshold, the base station switches from MR to WUR after the interval duration from the start of the reported measured value.

[0054] In some implementations of the methods and apparatus described herein, the pre-configuration condition is that a timer remaining in the MR or a timer remaining in the LP-WUR expires.

[0055] In some implementations of the methods and apparatus described herein, the timer residing in the MR or the timer residing in the LP-WUR starts from the reference time. Attached Figure Description

[0056] Figure 1 Examples of wireless communication systems according to various aspects of this disclosure are shown.

[0057] Figure 2 An example of a user equipment (UE) 200 according to various aspects of this disclosure is shown.

[0058] Figure 3 An example of a processor 300 according to various aspects of this disclosure is shown.

[0059] Figure 4 An example of a network device (NE) 400 according to various aspects of this disclosure is shown.

[0060] Figures 5(a) and 5(b) show the ultra-low power wake-up receiver and the main radio.

[0061] Figure 6 An example of the interval duration is shown.

[0062] Figures 7(a) to 7(c) show examples of pre-configured conditions.

[0063] Figure 8 A flowchart of a method performed by a UE according to various aspects of this disclosure is shown.

[0064] Figure 9 A flowchart of a method performed by an NE according to various aspects of this disclosure is shown. Detailed Implementation

[0065] The aspects of this disclosure are described in the context of wireless communication systems.

[0066] Figure 1 Examples of a wireless communication system 100 according to various aspects of this disclosure are shown. 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 implementations, 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 implementations, 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 implementations, 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).

[0067] 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), NodeBs, eNodeBs (eNBs), next-generation NodeBs (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.

[0068] 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 associated with services (e.g., voice, video, packet data, message sending and receiving, broadcasting, etc.) based on one or more radio access technologies. In some implementations, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some implementations, 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.

[0069] One or more UEs 104 may be distributed throughout the geographic area of ​​the wireless communication system 100. UE 104 may include or be referred to as a remote unit, mobile device, wireless device, remote device, subscriber device, transmitter device, receiver device, or some other suitable term. In some implementations, UE 104 may be referred to as a unit, station, terminal, or client, among other examples. Additionally or alternatively, UE 104 may be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a Machine Type Communication (MTC) device, among other examples.

[0070] UE 104 may be able to support direct wireless communication with other UE 104 via a communication link. For example, UE 104 may support direct wireless communication with another UE 104 via a device-to-device (D2D) communication link. In some implementations such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular V2X deployments, the communication link 114 may be referred to as a side link. For example, UE 104 may support direct wireless communication with another UE 104 via a PC5 interface.

[0071] NE 102 can support communication with CN 106 or with another NE 102, or both. For example, NE 102 can interface with other NE 102 or CN 106 via one or more backhaul links 116 (e.g., S1, N2, N2, or network interfaces). Network entities 102 can communicate with each other via backhaul links 116 (e.g., via X2, Xn, or another network interface). In some implementations, NE 102 can communicate directly with each other. In some other implementations, NE 102 can communicate indirectly with each other (e.g., via CN 106). In some implementations, one or more NE 102 may include sub-components, such as access network entities, which may be examples of access node controllers (ANCs). The ANC can communicate with one or more UEs 104 via one or more other access network transport entities (which may be referred to as radio heads, smart radio heads, or transmit-receive points (TRPs)).

[0072] CN 106 can support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. CN 106 can be an evolved packet core (EPC) or a 5G core (5GC), which may include control plane entities that manage access and mobility (e.g., a mobility management entity (MME), access and mobility management functions (AMF)) and user plane entities that route packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). In some implementations, the control plane entities may manage non-access stratum (NAS) functions of one or more UEs 104 served by one or more NEs 102 associated with CN 106, such as mobility, authentication, and bearer management (e.g., data bearers, signaling bearers, etc.).

[0073] CN 106 can communicate with packet data network 108 via one or more backhaul links (e.g., via S1, N2, N2, or another network interface). Packet data network 108 may include application server 118. In some implementations, one or more UEs 104 can communicate with application server 118. UE 104 can establish a session (e.g., Protocol Data Unit (PDU) session, etc.) with CN 106 via NE 102. CN 106 can use the established session (e.g., an established PDU session) to route services (e.g., control information, data, etc.) between UE 104 and application server 118. A PDU session can be an example of a logical connection between UE 104 and CN 106 (e.g., one or more network functions of CN 106).

[0074] In the wireless communication system 100, NE 102 and UE 104 can use the resources of the wireless communication system 100 (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communication). In some implementations, NE 102 and UE 104 can support different resource structures. For example, NE 102 and UE 104 can support different frame structures. In some implementations, such as in 4G, NE 102 and UE 104 can support a single frame structure. In some other implementations, such as in 5G and other suitable radio access technologies, NE 102 and UE 104 can support various frame structures (i.e., multiple frame structures). NE 102 and UE 104 can support various frame structures based on one or more sets of parameters.

[0075] The wireless communication system 100 may support one or more parameter sets, and the parameter sets may include subcarrier spacing and cyclic prefixes. The first parameter set (e.g., μ =0) can be associated with the first subcarrier spacing (e.g., 15 kHz) and the normal cyclic prefix. In some implementations, the first set of parameters (e.g., ) associated with the first subcarrier spacing (e.g., 15 kHz) is... μ =0) allows one time slot to be used per subframe. The second parameter set (e.g., μ =1) can be associated with the second subcarrier spacing (e.g., 30 kHz) and the normal cyclic prefix. The third parameter set (e.g., μ =2) can be associated with the third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. The fourth parameter set (e.g., μ =3) can be associated with the fourth subcarrier spacing (e.g., 120 kHz) and the normal cyclic prefix. The fifth parameter set (e.g., μ =4) can be associated with the fifth subcarrier spacing (e.g., 240 kHz) and the normal cyclic prefix.

[0076] Time intervals for resources (e.g., communication resources) can be organized according to frames (also known as radio frames). Each frame can have a duration, such as 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, such as 1 ms. In some implementations, each frame can have the same duration. In some implementations, each subframe of a frame can have the same duration.

[0077] Additionally or alternatively, the time intervals of resources (e.g., communication resources) can be organized according to time slots. For example, a subframe may include a certain number (e.g., quantity) of time slots. The number of time slots in each subframe may also depend on one or more sets of parameters supported in the wireless communication system 100. For example, the first, second, third, fourth, and fifth sets of parameters (i.e., ...) associated with corresponding subcarrier intervals of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz. μ =0、 μ =1、 μ =2、 μ =3、 μ =4) Each subframe can utilize a single time slot, two time slots, four time slots, eight time slots, or 16 time slots, respectively. Each time slot can include a certain number (e.g., quantity) of symbols (e.g., OFDM symbols). In some implementations, the number (e.g., quantity) of time slots used for a subframe can depend on the parameter set. For a normal cyclic prefix, a time slot can include 14 symbols. For an extended cyclic prefix (e.g., for a 60kHz subcarrier spacing), a time slot can include 12 symbols. The relationship between the number of symbols per time slot for the normal and extended cyclic prefixes, the number of time slots per subframe, and the number of time slots per frame can depend on the parameter set. It should be understood that for the first parameter set (e.g., quantity) associated with the subcarrier spacing (e.g., 15kHz), μ The reference of =0) can be used interchangeably between subframes and time slots.

[0078] In the wireless communication system 100, the electromagnetic (EM) spectrum can be divided into various categories, frequency bands, frequency channels, etc., based on frequency or wavelength. As an example, the wireless communication system 100 can support one or more operating frequency bands, such as frequency ranges specified as 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, NE 102 and UE 104 can perform wireless communication on one or more operating frequency bands. In some implementations, FR1 can be used by NE 102 and UE 104, along with other equipment or devices, for cellular communication services (e.g., control information, data). In some implementations, FR2 can be used by NE 102 and UE 104, as well as other equipment or devices, for short-range, high data rate capabilities.

[0079] FR1 can be associated with one or more parameter sets (e.g., at least three parameter sets). For example, FR1 can be associated with the following: a first parameter set including a 15 kHz subcarrier spacing (e.g., μ =0); including a second set of parameters (e.g., 30kHz subcarrier spacing). μ =1); and a third set of parameters including a 60kHz subcarrier spacing (e.g., μ =2). FR2 can be associated with one or more parameter sets (e.g., at least two parameter sets). For example, FR2 can be associated with a third parameter set including a 60kHz subcarrier spacing (e.g., μ =2) and a fourth set of parameters including a 120kHz subcarrier spacing (e.g., μ =3) Related.

[0080] Figure 2 An example of a UE 200 according to various aspects of this disclosure is shown. UE 200 may include a processor 202, a memory 204, a controller 206, and a transceiver 208. The processor 202, memory 204, controller 206, or transceiver 208, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0081] Processor 202, memory 204, controller 206, or transceiver 208, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may include a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof, configured to or otherwise supporting means for performing the functions described in this disclosure.

[0082] Processor 202 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some implementations, processor 202 may be configured to operate memory 204. In other implementations, memory 204 may be integrated into processor 202. Processor 202 may be configured to execute computer-readable instructions stored in memory 204 to cause UE 200 to perform various functions of this disclosure.

[0083] Memory 204 may include volatile or non-volatile memory. Memory 204 may store computer-readable, computer-executable code, including instructions that, when executed by processor 202, cause UE 200 to perform the various functions described herein. This code may be stored in a non-transient computer-readable medium, such as memory 204 or another type of memory. Computer-readable media include both non-transient computer storage media and communication media, with communication media including any medium that facilitates the transfer of a computer program from one place to another. Non-transient storage media may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0084] In some implementations, processor 202 and memory 204 coupled to processor 202 can be configured to cause UE 200 to perform one or more functions described herein (e.g., to execute instructions stored in memory 204 by processor 202). For example, processor 202 may support wireless communication at UE 200 according to examples disclosed herein. UE 200 may be configured to: receive a low-power wake-up signal (LP-WUS) to be transmitted in a low-power wake-up radio (LP-WUR) in the main radio (MR); and switch between operation in the MR and operation in the LP-WUR according to explicit indications or pre-configured conditions.

[0085] Controller 206 can manage input and output signals for UE 200. Controller 206 can also manage peripheral devices not integrated into UE 200. In some implementations, controller 206 can utilize operating systems such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some implementations, controller 206 can be implemented as part of processor 202.

[0086] In some implementations, UE 200 may include at least one transceiver 208. In other implementations, UE 200 may have more than one transceiver 208. Transceiver 208 may represent a wireless transceiver. Transceiver 208 may include one or more receiver chains 210, one or more transmitter chains 212, or a combination thereof.

[0087] Receiver chain 210 can be configured to receive signals (e.g., control information, data, packets) via a wireless medium. For example, receiver chain 210 may include one or more antennas for receiving signals over the air or via a wireless medium. Receiver chain 210 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 210 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 210 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0088] Transmitter chain 212 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 212 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes such as phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 212 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 212 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0089] Figure 3 An example of a processor 300 according to various aspects of this disclosure is shown. Processor 300 may be an example of a processor configured to perform various operations as described herein. Processor 300 may include a controller 302 configured to perform various operations as described herein. Processor 300 may optionally include at least one memory 304, which may be, for example, an L1 / L2 / L3 cache. Additionally or alternatively, processor 300 may optionally include one or more arithmetic logic units (ALUs) 306. One or more of these components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0090] Processor 300 may be a processor chipset and includes a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receive, acquire, retrieve, send, output, forward, store, determine, identify, access, write, read) according to the examples described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory native 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 (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase-change memory (PCM), and others).

[0091] Controller 302 can be configured to manage and coordinate various operations of processor 300 (e.g., signaling, receiving, acquiring, retrieving, sending, outputting, forwarding, storing, determining, identifying, accessing, writing, and reading) to enable processor 300 to support various operations according to the examples described herein. For example, controller 302 can operate as a control unit of processor 300, generating control signals that manage the operation of various components of processor 300. These control signals include enabling or disabling functional units, selecting data paths, initiating memory accesses, and coordinating the timing of operations.

[0092] Controller 302 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from memory 304 and determine subsequent instructions to be executed to enable processor 300 to support various operations according to the examples described herein. Controller 302 may be configured to track the memory addresses of instructions associated with memory 304. Controller 302 may be configured to decode instructions to determine the operations to be performed and the operands involved. For example, controller 302 may be configured to interpret instructions and determine control signals to be output to other components of processor 300 to enable processor 300 to support various operations according to the examples described herein. Additionally or alternatively, controller 302 may be configured to manage the flow of data within processor 300. Controller 302 may be configured to control the transfer of data between registers, arithmetic logic unit (ALU), and other functional units of processor 300.

[0093] Memory 304 may include one or more caches (e.g., memory native to or included in the processor 300) or other memories such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, memory 304 may reside within or on the processor chipset (e.g., native to the processor 300). In other implementations, memory 304 may reside outside the processor chipset (e.g., remote from the processor 300).

[0094] Memory 304 may store computer-readable, computer-executable code, including instructions that, when executed by processor 300, cause processor 300 to perform the various functions described herein. This code may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. Controller 302 and / or processor 300 may be configured to execute the computer-readable instructions stored in memory 304 to cause processor 300 to perform various functions. For example, processor 300 and / or controller 302 may be coupled or coupled to memory 304, and processor 300, controller 302, and memory 304 may be configured to perform the various functions described herein. In some examples, processor 300 may include multiple processors, and memory 304 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform the various functions described herein.

[0095] One or more ALUs 306 can be configured to support various operations according to the examples described herein. In some implementations, one or more ALUs 306 may reside within or on a processor chipset (e.g., processor 300). In some other implementations, one or more ALUs 306 may reside outside the 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 circuitry, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to the operation. Additionally or alternatively, one or more ALUs 306 may support logical operations such as AND, OR, XOR, NOR, and NAND, thereby enabling one or more ALUs 306 to handle conditional operations, comparisons, and bitwise operations.

[0096] Processor 300 can support wireless communication according to examples disclosed herein. Processor 300 can be configured or operable to: receive a low-power wake-up signal (LP-WUS) to be transmitted in a low-power wake-up radio (LP-WUR) in a main radio (MR); and switch between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0097] Figure 4 Examples of NE 400 according to various aspects of this disclosure are shown. NE 400 may include a processor 402, a memory 404, a controller 406, and a transceiver 408. The processor 402, memory 404, controller 406, or transceiver 408, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0098] Processor 402, memory 404, controller 406, or transceiver 408, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may include a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof, configured to or otherwise supporting means for performing the functions described in this disclosure.

[0099] Processor 402 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some implementations, processor 402 may be configured to operate memory 404. In other implementations, memory 404 may be integrated into processor 402. Processor 402 may be configured to execute computer-readable instructions stored in memory 404 to cause NE 400 to perform various functions of this disclosure.

[0100] Memory 404 may include volatile or non-volatile memory. Memory 404 may store computer-readable, computer-executable code, including instructions that, when executed by processor 402, cause NE 400 to perform the various functions described herein. This code may be stored in a non-transient computer-readable medium, such as memory 404 or another type of memory. Computer-readable media include both non-transient computer storage media and communication media, with communication media including any medium that facilitates the transfer of computer programs from one place to another. Non-transient storage media may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0101] In some implementations, processor 402 and memory 404 coupled to processor 402 can be configured such that NE 400 performs one or more functions described herein (e.g., processor 402 executes instructions stored in memory 404). For example, processor 402 can support wireless communication at NE 400 according to examples disclosed herein. NE 400 can be configured to: transmit a low-power wake-up signal (LP-WUS) in the main radio (MR) to be transmitted in the low-power wake-up radio (LP-WUR); and switch between operation in the MR and operation in the LP-WUR according to explicit instructions or pre-configured conditions.

[0102] Controller 406 can manage input and output signals for NE 400. Controller 406 can also manage peripheral devices not integrated into NE 400. In some implementations, controller 406 can utilize operating systems such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some implementations, controller 406 can be implemented as part of processor 402.

[0103] In some implementations, the NE 400 may include at least one transceiver 408. In other implementations, the NE 400 may have more than one transceiver 408. The transceiver 408 may represent a wireless transceiver. The transceiver 408 may include one or more receiver chains 410, one or more transmitter chains 412, or a combination thereof.

[0104] Receiver chain 410 can be configured to receive signals (e.g., control information, data, packets) via a wireless medium. For example, receiver chain 410 may include one or more antennas for receiving signals over the air or via a wireless medium. Receiver chain 410 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 410 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 410 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0105] Transmitter chain 412 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 412 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes such as phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 412 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 412 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0106] In NR, the UE can use discontinuous reception (DRX) in either the RRC_IDLE state (or idle mode) or the RRC_INACTIVE state (or inactive mode) to reduce power consumption. The UE monitors a paging opportunity (PO) every DRX cycle (which may also be referred to as a DRX period).

[0107] If DRX transmission is configured by a higher layer, the UE needs to be woken up periodically once per DRX cycle, which dominates power consumption during cycles without signaling or data traffic. Power consumption can be significantly reduced if the UE can only be woken up when triggered (e.g., when it is paged). This can be achieved by using a Wake-up Signal (WUS). For UEs in idle or inactive mode, the WUS, conveyed in DCI (Downlink Control Information) formats 2-7, indicates whether a paging process exists in a predefined PO (or a UE-specific MO (Monitoring Moment)) during the DRX ON duration.

[0108] It also supports DRX (i.e., C-DRX) in RRC_CONNECTED state (or connected mode). For UEs in connected mode, WUS, conveyed by DCI format 2-6, is also introduced to notify the UE whether to wake up to monitor PDCCH (Physical Downlink Control Channel) for data transmission and reception.

[0109] A lower power wake-up receiver (LP-WUS) was further introduced. In addition to the main radio (MR), a separate receiver, such as an ultra-low power wake-up receiver or wake-up radio (LP-WUR), is also included in the UE. In short, LP-WUR (which can be abbreviated as "WUR") refers to the receiver (Rx) module that operates for receiving and processing signals and channels associated with low power wake-up; MR refers to the Tx / Rx (receiver and transmitter) module that operates for NR signals and channels other than those associated with low power wake-up. LP-WUS is monitored by the UE by the WUR. As shown in Figure 5(a), if WUS(OFF) indicates that there is no paging process for the UE in the PO, the 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 Figure 5(b), if WUS(ON) indicates that there is a paging process for the UE in the 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 during the DRX ON duration).

[0110] MR needs to monitor SSB (SS / PBCH block, i.e., synchronization signal / physical broadcast channel). WUR needs to monitor the lower power synchronization signal (LP-SS). The LP-WUS in WUR and the SSB in MR can be in the same frequency band (e.g., the FR1 (frequency range 1) band or even in the same BWP (bandwidth portion)) or different frequency bands. Since LP-SS and LP-WUS are in the same frequency band, LP-SS and SSB can be configured in the same or different frequency bands.

[0111] In addition to WUS, Early Paging Indication (EPI) or Early Paging Indication (PEI) can be introduced. The UE can be notified via PEI whether it must monitor the PO before its PO. PEI can be signaled via DCI messages carried in the PDCCH (e.g., DCI format 2-7). PEI can carry sub-packet information to segment UEs, resulting in a lower group paging rate and fewer false paging alarms.

[0112] LP-WUS can be transmitted by a base station (e.g., gNB) and monitored and received by the UE on the first frequency band (e.g., on the first BWP of the first carrier); and paging messages in PEI and PO can be transmitted by a base station (e.g., gNB) and monitored and received by the UE on the second frequency band (e.g., on the second BWP of the second carrier).

[0113] The first frequency band may be the same as or different from the second frequency band.

[0114] If the first frequency band and the second frequency band are the same, then the first carrier can be the same as the second carrier and / or the first BWP can be the same as the second BWP.

[0115] Preferably, the first BWP is different from the second BWP, taking into account coverage and / or gNB scheduling.

[0116] LP-WUS is configured by higher layers. The LP-WUS configuration for the UE is sent to the UE by being included in system information or in UE-specific RRC signaling. The UE monitors LP-WUS in the first frequency band (e.g., the first carrier or the first BWP in the first carrier). Based on the LP-WUS indication (e.g., WUS ON), the UE switches to MR to receive paging messages in the second frequency band, or switches to the DRX ON duration to receive control signals in the second frequency band.

[0117] In addition to the WUS(ON) indication, the UE may also switch from WUR to MR for other reasons (e.g., poor channel conditions).

[0118] Additionally, the UE may switch from MR to WUR for various reasons (e.g., low load, power saving, etc.). When the UE switches from MR to WUR, LP-WUS monitoring can be activated.

[0119] This disclosure proposes a switch between operation in the MR and operation in the WUR based on explicit indications or pre-configuration conditions (i.e., pre-configuration conditions being met).

[0120] Switching between operations in MR and operations in WUR can refer to (1) switching between monitoring control signals in the second frequency band (e.g., the second BWP and / or the second carrier) in MR and monitoring LP-WUS in the first frequency band (e.g., the first BWP and / or the first carrier) in WUR.

[0121] Switching between operations in MR and operations in WUR can refer to (2) activating LP-WUS monitoring in the first frequency band. For example, LP-WUS monitoring is activated when the UE switches from MR to WUR.

[0122] Switching between operations in MR and operations in WUR can refer to (3) deactivating LP-WUS monitoring in the first frequency band. For example, when the UE switches from WUR to MR, LP-WUS monitoring is deactivated.

[0123] Switching between operations in MR and operations in WUR can refer to any combination of (1), (2) and (3).

[0124] In other words, the switching between operation in MR and operation in LP-WUR can be a switching between monitoring LP-WUS in the first frequency band in LP-WUR and monitoring control signals in the second frequency band in MR. Specifically, it can include (1) activating LP-WUS monitoring in the first frequency band in LP-WUR, i.e., from MR to LP-WUR; and / or (2) deactivating LP-WUS monitoring in the first frequency band in LP-WUR, i.e., from LP-WUS to MR.

[0125] The first embodiment involves a UE in idle or inactive mode switching from MR to WUR. Switching from MR to WUR means that LP-WUS monitoring is activated.

[0126] According to a first sub-implementation of the first embodiment, a UE in idle or inactive mode switches from MR to WUR based on an explicit indication (e.g., an explicit indication from the gNB). For example, if the network (e.g., the gNB) has low load and / or if resources can be reserved for LP-SS and LP-WUS transmissions, the gNB can explicitly configure or indicate LP-WUS monitoring activation in the first frequency band for a UE with LP-WUS monitoring capabilities (e.g., switching from MR to WUR).

[0127] In a first implementation of a first sub-implementation of the first embodiment, an explicit indication is sent from the gNB via system information and / or RRC signaling and received by the UE in connected mode before the UE enters idle or inactive mode. For example, the explicit indication is included in an RRC connection release message, which is existing RRC signaling.

[0128] The RRC connection release message instructs the UE to switch to idle or inactive mode, or instructs the UE to redirect to another carrier or other frequency.

[0129] If an RRC connection release message instructs the UE to switch to idle or inactive mode, an explicit indication can be included in the RRC connection release message. In this case, upon receiving an RRC connection release message instructing the UE to switch to idle or inactive mode and including an explicit indication, the UE switches from connected mode to idle or inactive mode (e.g., by stopping the corresponding timer and releasing the corresponding configuration), and further switches from MR to WUR. Note that the UE can switch from connected mode to idle or inactive mode and from MR to WUR in the same process.

[0130] Alternatively, an explicit indication can be included in the RRC connection release message, which itself (instructing the UE to switch to idle or inactive mode) can be used as an explicit indication. This means that upon receiving an RRC connection release message instructing the UE to switch to idle or inactive mode, the UE switches from connected mode to idle or inactive mode and from MR to WUR.

[0131] In various first implementations, a gap duration is introduced before the UE switches from the MR to the WUR. The gap duration can be configured, pre-configured, or predetermined by the gNB (e.g., based on UE capabilities and / or gNB capabilities). The gap duration can depend on the operations to be performed during the gap duration (e.g., time and frequency synchronization, message processing). The gap duration can be used for the UE to return to the paging BWP in the MR (e.g., CORESET#0) to obtain initial time and frequency synchronization. Specifically, upon receiving an RRC connection release message instructing the UE to switch to idle or inactive mode (where the RRC connection release message is used as an explicit indication, or the RRC connection release message includes an explicit indication), the UE first switches from connected mode to idle or inactive mode. Afterward, the UE obtains initial time and frequency synchronization for the paging BWP. After the gap duration, the UE switches from the MR to the WUR.

[0132] The gap duration can begin upon receiving the RRC connection release message. That is, during the gap duration, the UE first switches from connected mode to idle or inactive mode. Afterward, the UE obtains initial time and frequency synchronization for the paging BWP.

[0133] Alternatively, the gap duration can begin after the device has switched to idle or inactive mode. That is, during the gap duration, the UE obtains initial time and frequency synchronization for the paging BWP.

[0134] After the interval duration, the UE switches from MR to WUR.

[0135] The duration of the gap is determined by both the frequency band of the MR and the frequency band of the WUR, or the subcarrier spacing of the MR and / or the subcarrier spacing of the WUR, both frequency band and subcarrier spacing. For example, if the frequency bands of the MR and WUR are the same (e.g., in-band: same carrier), the gap duration can be a smaller value, such as 3 ms. Otherwise, if the frequency bands of the MR and WUR are different, the gap duration can be a larger value, such as 10 ms. As another example, if the subcarrier spacing is 15 kHz (…), the gap duration can be larger. μ =0), then the interval duration can be 2 time slots; while if the subcarrier interval is 30kHz ( μ If = 1), then the interval duration can be 4 time slots.

[0136] Alternatively, the duration of the gap can be configured by a higher layer.

[0137] Alternatively, the duration of the gap can be determined as follows: the gap duration can begin from the reception of an RRC connection release message, or from when the device has switched to idle or inactive mode. The UE monitors the PO in the MR until the PO does not contain a paging message for the UE, at which point the gap duration ends.

[0138] Figure 6 An example of the interval duration is shown.

[0139] The UE in connected mode is in BWP#x. The UE receives an RRC connection release message in BWP#x. The UE enters idle mode (i.e., switches from connected mode to idle or inactive mode) and returns to BWP#y (e.g., paging BWP (e.g., CORESET#0)) for paging monitoring in MR. During the gap duration, the UE obtains initial time and frequency synchronization for BWP#y, which can be used later when the UE switches from BWP#z to BWP#y (i.e., from WUR to MR). After the gap duration, the UE switches from BWP#y to BWP#z (i.e., from MR to WUR).

[0140] If no interval duration is configured, the UE directly enters idle or inactive mode and switches from BWP#x to BWP#z (i.e., from MR to WUR). This means the UE cannot obtain initial time and frequency synchronization with BWP#y. In other words, the UE remains in BWP#x before entering idle or inactive mode. This will create a burden for subsequent switches from BWP#z to BWP#y.

[0141] In a second implementation of the first sub-implementation of the first embodiment, an explicit indication is included in the control signal (e.g., DCI format 2-7) monitored by the UE in idle or inactive mode. In idle or inactive mode, the UE needs to monitor DCI format 2-7. Therefore, DCI format 2-7 can be reused to include an explicit indication.

[0142] The UE in inactive or idle mode monitors and receives control signals (e.g., DCI format 2-7). Control signals include explicit indications that instruct the UE to switch from MR to WUR.

[0143] The LP-WUS activation field can be introduced in DCI format 2-7 for use as an explicit indication. Based on the LP-WUS activation field, one or more UEs can be indicated to switch from MR to WUR.

[0144] For example, the public LP-WUS activation field is included in DCI formats 2-7. If the public LP-WUS activation field is set to "1", it indicates that all UE groups associated with the public LP-WUS activation field are switching from MR to WUR. Furthermore, the wake-up signal indication field for each UE group indicates "no paging timing monitoring required". If the public LP-WUS activation field is set to "0", no UE group switches from MR to WUR. This means that all UE groups remain in MR and monitor control signals (e.g., DCI formats 2-7).

[0145] For example, DCI format 2-7 includes a separate LP-WUS activation field for each group of UEs. If the separate LP-WUS activation field is set to "1", it indicates that the UE group associated with that separate LP-WUS activation field is switching from MR to WUR. In addition, the wake-up signal indication field for that group of UEs indicates "no paging timing monitoring required".

[0146] Instead of the LP-WUS activation field, the state of one of the existing fields in DCI formats 2-7 is reinterpreted to indicate the UE group's switch from MR to WUR. For example, if all '0's are set in the paging indication field and the TRS availability indication field, then the indication of a switch from MR to WUR is interpreted for all UE groups, for example.

[0147] Optionally, in idle or inactive mode, an LP-WUS activation field can be introduced into the paging short message in DCI format 1-0 with a CRC scrambled by P-RNTI.

[0148] According to the second sub-implementation of the first embodiment, the UE in idle or inactive mode switches from MR to WUR according to pre-configured conditions.

[0149] In a first implementation of the second sub-implementation of the first embodiment, the pre-configuration condition is that the measured values ​​(e.g., RSRP, RSRQ, SINR) in the MR are greater than a threshold. This means that if the channel conditions in the MR are good (e.g., the UE is close to the gNB), the UE can switch from the MR to the WUR. Specifically, for a UE in idle or inactive mode, if the measured value is greater than the threshold, the UE autonomously switches from the MR to the WUR. In this case, since the gNB is unaware of the switch from the MR to the WUR, it is assumed that the gNB should simultaneously send a traditional paging indication in the MR and an LP-WUS in the WUR.

[0150] In a second implementation of the second sub-implementation of the first embodiment, the pre-configuration condition is that the timer remaining in the MR expires. This means that for a UE in idle or inactive mode, if the UE monitors control signals in the MR for a long period of time, the UE switches to the WUR for low-power LP-WUS monitoring. Specifically, a timer remaining in the MR is configured. If the timer remaining in the MR expires, the UE in idle or inactive mode switches from the MR to the WUR. The timer remaining in the MR starts from a reference time point. The reference time point can be, but is not limited to, the time when the UE switches from the WUR to the MR in idle or inactive mode, or the time when the UE switches from connected mode to idle or inactive mode in the MR.

[0151] The second embodiment involves a UE in idle or inactive mode switching from WUR to MR. Switching from WUR to MR means that LP-WUS monitoring is deactivated.

[0152] According to the first sub-implementation of the second embodiment, the UE in idle or inactive mode switches from WUR to MR according to an explicit instruction.

[0153] Explicit indications can be included in LP-SS, LP-WUS, or a combination of LP-SS and LP-WUS. Upon receiving an explicit indication to switch from WUR to MR, LP-WUS monitoring is deactivated and the UE switches from WUR to MR.

[0154] According to the second sub-implementation of the second embodiment, a UE in idle or inactive mode switches from WUR to MR according to pre-configured conditions.

[0155] In the first implementation of the second sub-implementation of the second embodiment, the pre-configuration condition is that the measured values ​​(e.g., LP-RSRP, LP-RSRQ) in the WUR are less than a threshold. This means that if the channel conditions in the WUR are poor, the UE can switch from the WUR to the MR. Specifically, for a UE in idle or inactive mode, if the measured values ​​are below the threshold, the UE autonomously switches from the WUR to the MR. That is, LP-WUS monitoring in the WUR is deactivated, while the UE in inactive or idle mode monitors the PO or PEI in the MR. The UE can report the handover (from WUR to MR) via RACH or configured resources (e.g., SDT (Small Data Transfer)). The RACH resources or SDT resources are specifically configured.

[0156] In a second implementation of a second sub-implementation of the second embodiment, the pre-configuration condition is that the timer remaining in the WUR expires. The timer remaining in the WUR is configured. If the timer remaining in the WUR expires, the UE in idle or inactive mode switches from the WUR to MR (while LP-WUS monitoring in the WUR is deactivated). The timer remaining in the WUR starts from a reference time point. The reference time point can be, but is not limited to: the time when the UE switches from MR to the WUR, the time when the UE switches from connected mode to idle or inactive mode, or the time when the UE switches from idle or inactive mode to connected mode.

[0157] Figure 7(a) illustrates an example of the second implementation. In Figure 7(a), it is assumed that the timer for staying in the WUR is 50ms, and the reference time is the time when the UE switches from the MR to the WUR. Whenever the timer for staying in the WUR expires, the UE switches from the WUR to the MR. Furthermore, the timer for staying in the WUR starts from the time when the UE switches from the MR to the WUR.

[0158] Figure 7(b) illustrates another example of a second implementation combining the first implementation. If the timer remaining in the WUR expires, the UE switches from the WUR to the MR. Furthermore, if the channel conditions in the WUR are poor, the UE switches from the WUR to the MR. Additionally, if the UE switches from the WUR to the MR for other reasons (e.g., poor channel conditions in the WUR (measurements below a threshold)), the timer remaining in the WUR becomes invalid. The reference time for the timer remaining in the WUR is the time when the UE switches from the MR to the WUR.

[0159] In a third implementation of the second sub-implementation of the first embodiment, the UE in idle or inactive mode periodically switches from WUR to MR starting from a start time point. The period is configured by a higher layer. The start time point can be, but is not limited to: the UE switching from connected mode to inactive or idle mode, the UE switching from MR to WUR for the first time, or an absolute time slot.

[0160] Figure 7(c) illustrates an example of a third implementation combining the first implementation. In Figure 7(c), assume a period of 50ms and a start time when the UE first switches from MR to WUR. It can be seen that within period #2, the UE switches from WUR to MR for other reasons (e.g., poor channel conditions in WUR). Subsequently, when the UE switches from MR to WUR, it is the second switch from MR to WUR (within period #2). Therefore, period #2 continues.

[0161] The third embodiment involves a UE in connected mode switching from MR to WUR.

[0162] According to a first sub-implementation of the third embodiment, the UE in connection mode switches from MR to WUR according to an explicit instruction (e.g., an explicit instruction from the gNB).

[0163] In a first implementation of a first sub-implementation of the third embodiment, an explicit indication is sent from the gNB via system information and / or RRC signaling. For example, the explicit indication could be an RRC configuration message indicating a switch from the MR to the WUR. The gap duration is configured after receiving the RRC configuration message or after receiving a HARQ feedback transmission. After the gap duration, the UE switches from the MR to the WUR. Similar to the gap duration described in various first implementations (1.1.1) of the first sub-implementation of the first embodiment, the gap duration described herein (in the first implementation of the first sub-implementation of the third embodiment) can be configured, pre-configured, or predetermined by the gNB (e.g., based on UE capabilities and / or gNB capabilities). Furthermore, the gap duration can depend on the operations to be performed during the gap duration.

[0164] In a second implementation of the first sub-implementation of the third embodiment, the SCell activation trigger message or SCell configuration can be used as an explicit indication to switch from MR to WUR.

[0165] In a third implementation of the first sub-implementation of the third embodiment, the UE in connected mode switches from MR to WUR based on a control signal (e.g., DCI format 2-6). In connected mode, the UE needs to monitor DCI format 2-6. DCI format 2-6 can be reused to include explicit indications.

[0166] Traditionally, DCI format 2-6 is used to notify one or more UEs of power saving information outside of DRX activity time. The following information is sent via DCI format 2-6 with a CRC scrambled by PS-RNTI: block number 1, block number 2, ..., block number N, where the starting position of the block is determined by the parameter ps-PositionDCI-2-6 provided by the higher layer to the UE configured with that block.

[0167] The LP-WUS activation field can be introduced in DCI format 2-6.

[0168] For example, the common LP-WUS activation field is included in DCI format 2-6. If the common LP-WUS activation field is set to "1", it indicates that all UEs (i.e., all UEs associated with all blocks) are switched from MR to WUR. If the common LP-WUS activation field is set to "0", DCI format 2-6 is used as the conventional DCI format 2-6.

[0169] For example, DCI formats 2-6 include a separate LP-WUS activation field for each block. For instance, the wake-up indication field for each block is replaced by a separate LP-WUS activation field. If the separate LP-WUS activation field for a block is set to "1", it indicates that the UE associated with that block is switching from MR to WUR. If the separate LP-WUS activation field for a block is set to "0", the UE associated with that block follows conventional behavior.

[0170] Instead of the LP-WUS activation field, the state of one of the existing fields in DCI format 2-6 is reinterpreted to indicate the UE's switch from MR to WUR.

[0171] According to the second sub-implementation of the third embodiment, the UE in connection mode switches from MR to WUR according to pre-configured conditions.

[0172] In the first implementation of the second sub-implementation of the third embodiment, the pre-configuration condition is that the measured values ​​(e.g., RSRP, RSRQ, SINR) in the MR are greater than a threshold. This means that if the channel conditions in the MR are good (e.g., the UE is close to the gNB), the UE can switch from the MR to the WUR. Specifically, for a UE in connected mode, if the measured value is greater than the threshold, the UE switches from the MR to the WUR after the interval duration from the start of the reported measured value.

[0173] The interval duration is determined by the subcarrier spacing of MR and WUR, as well as the frequency band of MR and WUR.

[0174] The fourth embodiment involves a UE in connected mode switching from WUR to MR. Switching from WUR to MR means that LP-WUS monitoring is deactivated.

[0175] According to the first sub-implementation of the fourth embodiment, the UE in connection mode switches from WUR to MR according to an explicit instruction.

[0176] In a first implementation of a first sub-implementation of the fourth embodiment, the explicit indication may be included in LP-SS, or LP-WUS, or a combination of LP-SS and LP-WUS. Upon receiving an explicit indication to switch from WUR to MR, LP-WUS monitoring is deactivated and the UE switches from WUR to MR.

[0177] In the second implementation of the first sub-implementation of the fourth embodiment, the SCell deactivation trigger message or SCell deactivation configuration can be used as an indication to switch from WUR to MR.

[0178] According to the second sub-implementation of the fourth embodiment, the UE in connection mode switches from WUR to MR according to pre-configured conditions.

[0179] In the first implementation of the second sub-implementation of the fourth embodiment, the pre-configuration condition is that the measured values ​​in the WUR (e.g., LP-RSRP, LP-RSRQ) are less than a threshold. This means that if the channel conditions in the WUR are poor, the UE can switch from the WUR to MR. Specifically, for a UE in connected mode, if the measured values ​​are below the threshold, the UE autonomously switches from the WUR to MR. That is, LP-WUS monitoring is deactivated. The UE can report the handover (from WUR to MR) via RACH or a configured resource (e.g., SDT). The RACH resource or SDT resource is specifically configured.

[0180] In the second implementation of the second sub-implementation of the fourth embodiment, the pre-configuration condition is that the timer remaining in the WUR expires. The timer remaining in the WUR is configured. If the timer remaining in the WUR expires, the UE in connected mode switches from the WUR to the MR (while LP-WUS monitoring in the WUR is deactivated). The timer remaining in the WUR starts from a reference time point. The reference time point can be, but is not limited to, the time when the UE switches from the MR to the WUR.

[0181] Figure 8 A flowchart of a method 800 according to various aspects of this disclosure is shown. The operation of this method can be implemented by a UE as described herein. In some implementations, the UE can execute a set of instructions to control the functional elements of the UE to perform the described functions.

[0182] At 802, the configuration for receiving the lower power wake-up signal (LP-WUS) to be transmitted in the lower power wake-up radio (LP-WUR) is configured in the main radio (MR).

[0183] At 804, switch between operation in MR and operation in LP-WUR based on explicit instructions or pre-configured conditions.

[0184] Figure 9 A flowchart of a method 900 according to various aspects of this disclosure is shown. The operation of this 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.

[0185] At 902, the configuration for transmitting a low-power wake-up signal (LP-WUS) to be transmitted in the low-power wake-up radio (LP-WUR) is made in the main radio (MR).

[0186] At 904, switch between operation in MR and operation in LP-WUR based on explicit instructions or pre-configured conditions.

[0187] It should be noted that the methods described in this paper describe possible implementations, and these operations and steps can be rearranged or otherwise modified, and other implementations are possible.

[0188] The description herein is provided to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given 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; as well as At least one processor, coupled to the at least one memory and configured such that the UE: The configuration for receiving the low-power wake-up signal (LP-WUS) to be transmitted in the low-power wake-up radio (LP-WUR) in the main radio (MR); as well as Switch between operations in MR and LP-WUR based on explicit instructions or pre-configured conditions.

2. The UE according to claim 1, wherein, Switching between operations in MR and LP-WUR includes: (1) Activate LP-WUS monitoring in the first frequency band in LP-WUR. (2) Deactivate LP-WUS monitoring in the first frequency band in LP-WUR. (3) Switching between monitoring LP-WUS in the first frequency band in LP-WUR and monitoring control signals in the second frequency band in MR, or Any combination of (1), (2) and (3).

3. The UE according to claim 1, wherein, The explicit indication is included in the system information and / or RRC signaling.

4. The UE according to claim 3, wherein, The explicit indication instructs the UE to switch from MR to LP-WUR, and The explicit indication is either an RRC connection release message or is included in an RRC connection release message.

5. The UE according to claim 4, wherein, The gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins from the receipt of the RRC connection release message or from when the UE has switched from connected mode to idle or inactive mode, and The UE switches from MR to LP-WUR after the duration of the gap.

6. The UE according to claim 5, wherein, The duration of the gap ends after the UE detects a paging opportunity that does not include a paging message for the UE.

7. The UE according to claim 5, wherein, The duration of the gap is determined by the relationship between the first frequency band and the second frequency band, or The duration of the gap is determined by the subcarrier spacing of the first frequency band and / or the subcarrier spacing of the second frequency band, or The duration of the gap is configured by a higher layer, or The above are some of the combinations.

8. The UE according to claim 3, wherein, The explicit indication instructs the UE to switch from MR to LP-WUR, and The explicit indication is included in the RRC configuration message.

9. The UE according to claim 8, wherein, The gap duration is configured, pre-configured, or predetermined, wherein the gap duration begins from the reception of the RRC configuration message or from the transmission of HARQ feedback for the reception of the RRC configuration message, and The UE switches from MR to LP-WUR after the duration of the gap.

10. The UE according to claim 3, wherein, The explicit indication instructing the UE to switch from MR to LP-WUR is included in the SCell activation trigger message or SCell configuration, and The explicit indication that the UE switches from LP-WUR to MR is included in the SCell deactivation trigger message or SCell deactivation configuration.

11. The UE according to claim 1, wherein, The explicit indication instructs the UE to switch from MR to LP-WUR, and The explicit indication is included in the control signal.

12. The UE according to claim 11, wherein, One or more LP-WUS activation fields are included in the control signal.

13. The UE according to claim 12, wherein, The LP-WUS activation field and the corresponding wake-up signal indication field together indicate the switch from MR to LP-WUR.

14. The UE according to claim 12, wherein, The LP-WUS activation field is located in the paging short message in the control signal having a CRC scrambled by P-RNTI.

15. The UE according to claim 11, wherein, The specific status of the paging indication field and the TRS availability indication field in the control signal indicates the switching from MR to LP-WUR.

16. The UE according to claim 1, wherein, The explicit indication instructs the UE to switch from LP-WUR to MR, and The explicit indication is included in LP-SS or LP-WUS or a combination of LP-SS and LP-WUS, wherein both LP-SS and LP-WUS are sent in LP-WUR.

17. The UE according to claim 1, wherein, The pre-configuration condition is that the measured value is greater than or less than a threshold.

18. A processor in a UE for wireless communication, comprising: At least one controller, coupled to at least one memory and configured such that the processor: The configuration for receiving the low-power wake-up signal (LP-WUS) to be transmitted in the low-power wake-up radio (LP-WUR) in the main radio (MR); as well as Switch between operations in MR and LP-WUR based on explicit instructions or pre-configured conditions.

19. A method performed by a user equipment (UE), the method comprising: The configuration for receiving the low-power wake-up signal (LP-WUS) to be transmitted in the low-power wake-up radio (LP-WUR) in the main radio (MR); as well as Switching between operation in the main radio (MR) and operation in the LP-WUR is based on explicit instructions or pre-configured conditions.

20. A base station for wireless communication, comprising: At least one memory; as well as At least one processor, coupled to the at least one memory and configured such that the base station: The configuration for transmitting the low-power wake-up signal (LP-WUS) to be transmitted in the low-power wake-up radio (LP-WUR) in the main radio (MR); as well as Switch between operations in MR and LP-WUR based on explicit instructions or pre-configured conditions.

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