Terminal device, network device, and method

Abstract

Exemplary embodiments of this disclosure relate to devices, methods, and computer storage media for communication. A terminal device may perform MR and LP-WUR measurements on one or more adjacent cells. In some examples, the terminal device may perform cell reselection from one or more adjacent cells based on the MR and LP-WUR measurement values. This allows the terminal device to select a cell with a good balance between LP and MR signal coverage, thereby achieving better power saving gains.

Description

[Technical Field]

[0001] The exemplary embodiments of this disclosure relate generally to the field of communications technology, and more particularly to apparatus, methods, and computer-readable media for communications. [Background technology]

[0002] Several technologies have been proposed to reduce power consumption in terminal devices. For example, user equipment (UE) may enter a radio resource control (RRC) idle / inactive state to reduce power consumption. However, periodic paging monitoring and measurement still consume a considerable amount of power on the UE side, even in an RRC idle / inactive state, making it important for power-constrained devices such as Internet of Things (IoT) devices and wearable devices. Therefore, further reductions in UE power consumption are beneficial.

[0003] The study on Low Power Wake-Up Signals (LP-WUS) is underway in the discussions of Release 18 (Rel-18) of the 3rd Generation Partnership Project (3GPP). This study aims to research and evaluate Low Power Signal and Low Power Wake-Up Receiver (LP-WUR) technologies to enable extremely low power consumption and low wake-up delay, primarily in RRC idle / inactive states. However, further details regarding LP-WURs are still under consideration. [Overview of the project]

[0004] Generally, exemplary embodiments of this disclosure provide devices, methods, and computer storage media for communications.

[0005] In a first embodiment, a terminal device is provided. The terminal device comprises at least one processor, which is configured to cause the terminal device to perform Main Radio (MR) measurement and Low Power Wake-up Radio (LP-WUR) measurement for at least one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and to perform cell reselection from the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells.

[0006] In a second embodiment, a network device is provided. The network device comprises at least one processor, which is configured to cause the network device to transmit to a terminal device information indicating at least one of the following: performing cell reselection based on a main radio (MR) and a low-power wake-up radio (LP-WUR), performing cell reselection based on the MR, or performing cell reselection based on the LP-WUR.

[0007] In a third embodiment, a communication method is provided. The method includes, in a terminal device, performing a main radio (MR) measurement and a low-power wake-up radio (LP-WUR) measurement on one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and performing cell reselection from the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells.

[0008] In a fourth aspect, a communication method is provided. The method includes transmitting, from a network device to a terminal device, information indicating one of: performing reselection of a cell based on a main radio (MR) and a low power wake-up radio (LP-WUR); performing reselection of the cell based on the MR; or performing reselection of the cell based on the LP-WUR.

[0009] In a fifth aspect, a computer-readable medium storing instructions is provided. When the instructions are executed on at least one processor, the at least one processor is caused to perform a method according to the third or fourth aspect described above.

[0010] It should be understood that the summary section of the invention is not intended to identify important or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will be readily understood through the following description.

Brief Description of the Drawings

[0011] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of some exemplary embodiments of the present disclosure in the accompanying drawings.

[0012] [Figure 1A] An exemplary communication system in which some embodiments of the present disclosure can be implemented is shown.

[0013] [Figure 1B] A schematic diagram of LP (Low Power) signal coverage and MR signal coverage is shown. [Figure 1C] A schematic diagram of LP (Low Power) signal coverage and MR signal coverage is shown.

[0014] [Figure 2] A schematic diagram of a main radio and a low power wake-up receiver is shown.

[0015] [Figure 3A] Shows a schematic diagram of resources occupied by an LP signal that can be used in some exemplary embodiments of the present disclosure.

[0016] [Figure 3B] Shows a schematic diagram of an OOK (On-Off Keying) symbol that can be used in some exemplary embodiments of the present disclosure. [Figure 3C] Shows a schematic diagram of an OOK (On-Off Keying) symbol that can be used in some exemplary embodiments of the present disclosure.

[0017] [Figure 4] Shows a signaling chart showing a communication process according to some embodiments of the present disclosure.

[0018] [Figure 5] Shows a schematic diagram of fallback according to some embodiments of the present disclosure.

[0019] [Figure 6] Shows a signaling chart showing a communication process according to some embodiments of the present disclosure.

[0020] [Figure 7] Shows a schematic diagram of cell reselection according to some embodiments of the present disclosure.

[0021] [Figure 8] Shows a signaling chart showing a communication process according to some embodiments of the present disclosure.

[0022] [Figure 9A] Shows a schematic diagram of fallback according to some embodiments of the present disclosure. [Figure 9B] Shows a schematic diagram of fallback according to some embodiments of the present disclosure.

[0023] [Figure 10] A flowchart illustrating an exemplary method implemented in a terminal device according to several embodiments of this disclosure is shown.

[0024] [Figure 11] A flowchart illustrating exemplary methods implemented in network devices according to some embodiments of this disclosure is shown.

[0025] [Figure 12] A simplified block diagram of an apparatus suitable for carrying out embodiments of the present disclosure is shown.

[0026] Throughout the drawing, identical or similar reference numbers represent identical or similar elements. [Modes for carrying out the invention]

[0027] The principles of this disclosure will now be illustrated with reference to several exemplary embodiments. These embodiments are provided for illustrative purposes only and should be understood as being helpful to those skilled in the art in understanding and implementing this disclosure, without implying any limitation on the scope of this disclosure. The embodiments described herein can be implemented in a variety of ways other than those described below.

[0028] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which this disclosure belongs.

[0029] References in this disclosure such as “one embodiment,” “embodiment,” and “exemplary embodiment” indicate that the embodiments described may include certain features, structures, or characteristics, but not all embodiments are required to include such features, structures, or characteristics. Furthermore, such wording does not necessarily refer to the same embodiment. Moreover, if certain features, structures, or characteristics are described in relation to an embodiment, it is likely that the influence of such features, structures, or characteristics on other embodiments, whether explicitly described or not, would be within the knowledge of those skilled in the art.

[0030] In this specification, terms such as “first” and “second” may be used to describe various elements, but it should be understood that these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. For example, without departing from the scope of the exemplary embodiments, a first element may be called a second element, and similarly, a second element may be called a first element. Where used herein, the term “and / or” includes any combination of one or more of the terms described herein.

[0031] The terms used herein are for the sole purpose of describing specific embodiments and are not intended to limit exemplary embodiments. Where used herein, the singular forms “a / an” and “the” are intended to include the plural forms unless otherwise explicitly indicated in the context. Furthermore, where used herein, the terms “include,” “equip,” “have,” “possess,” “contain,” and / or “contain” are intended to identify the presence of the described features, elements, and / or components, etc., and are not intended to exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0032] In some examples, values, procedures, or devices are referred to as “best,” “worst,” “highest,” “minimum,” “maximum,” etc. Such descriptions are intended to show that a choice can be made from among many functional options being used, and it will be understood that such a choice does not need to be better, smaller, higher, or more preferable than the other options.

[0033] As used herein, the term “communication network” refers to a network compliant with an appropriate communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), or Narrow Band Internet of Things (NB-IoT). Furthermore, communication between terminal devices and network devices within a communication network may be conducted in accordance with any appropriate generation of communication protocol, including but not limited to first-generation (1G), second-generation (2G), 2.5G, 2.75G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G), 5.5G, 5G-Advanced Network, or sixth-generation (6G) communication protocols, and / or other protocols currently known or to be developed in the future. Embodiments of this disclosure may be applied to a variety of communication systems. Given the rapid development of communications, there will naturally be future types of communication technologies and systems to which this disclosure may be embodied. The scope of this disclosure should not be considered to be limited to the aforementioned systems.

[0034] As used herein, the term “terminal device” refers to any device equipped with wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, Ultra-Reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, Machine Type Communication (MTC) devices, Vehicle-mounted devices for V2X communication (where X means pedestrian, vehicle, or infrastructure / network), Integrated Access and Backhaul (IAB) devices, spacecraft or aerial vehicles within non-terrestrial networks (NTN) including high-altitude platforms (HAP) with satellites and unmanned aircraft systems (UAS), Augmented Reality (AR), Mixed Reality and Virtual Reality (VR) Examples include, but are not limited to, extended reality (XR) devices that include various types of reality such as reality, unmanned aerial vehicles (UAVs) which are aircraft without human pilot intervention, commonly known as drones, equipment mounted on high-speed trains (HSTs), image capture devices such as digital cameras, sensors, game consoles, music storage and playback devices, or internet devices that enable wireless or wired internet access and browsing.A “terminal device” may also have “multicast / broadcast” capabilities and support public safety and mission-critical, V2X applications, transparent IPv4 / IPv6 multicast distribution, IPTV, smart TV, radio services, software distribution over the radio, group communications, and IoT applications. It may also incorporate one or more Subscriber Identity Modules (SIMs), known as multi-SIMs. The term “terminal device” may be used interchangeably with UE, mobile station, subscriber station, mobile terminal, user terminal, or radio equipment.

[0035] As used herein, the term “Network device” refers to a device that can provide or host a cell or coverage on which terminal devices can communicate. Examples of network devices include, but are not limited to, satellites, unmanned aerial system (UAS) platforms, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), next-generation Node B (gNB), transmission reception point (TRP), remote radio unit (RRU), radio head (RH), remote radio head (RRH), IAB node, low-power nodes such as femtonodes, piconodes, and reconfigurable intelligent surface (RIS).

[0036] In one embodiment, a terminal device may be connected to a first network device and a second network device. One of the first and second network devices may be a master node, and the other may be a secondary node. The first and second network devices may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device is an eNB, and the second RAT device is a gNB. Information related to different RATs may be transmitted to the terminal device from at least one of the first and second network devices. In one embodiment, the first information may be transmitted from the first network device to the terminal device, and the second information may be transmitted directly from the second network device to the terminal device or via the first network device. In one embodiment, information regarding the configuration of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information regarding the reconfiguration of a terminal device set by the second network device may be transmitted directly from the second network device to the terminal device, or transmitted via the first network device.

[0037] The communications described herein may conform to any appropriate standard, including but not limited to New Radio Access (NR), Long-Term Evolution (LTE), LTE Evolution, LTE Advanced (LTE-A), Broadband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), cdma2000, and Global System for Mobile Communications (GSM). Furthermore, communications may be performed in accordance with any generation of communication protocol currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.85G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G), and sixth-generation (6G) communication protocols. The techniques described herein can be used not only for the radio networks and technologies described above, but also for other radio networks and technologies. Embodiments of the present disclosure may be implemented in accordance with any generation of communication protocols currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.75G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G) communication protocols, 5.5G, 5G-Advanced Network, or sixth-generation (6G) networks.

[0038] Terminal devices or network devices may be equipped with artificial intelligence (AI) or machine learning capabilities. These typically include models trained on large amounts of collected data for specific functions, which can then be used to predict certain information.

[0039] Terminal or network devices can operate in multiple frequency ranges, including FR1 (410 MHz to 7125 MHz), FR2 (24.25 GHz to 71 GHz), frequency bands above 100 GHz, and terahertz (THz). Furthermore, they can operate in licensed / unlicensed / shared spectrum. In multi-radio dual connectivity (MR-DC) application scenarios, terminal devices may have multiple connections to network devices. Terminal or network devices may operate in full-duplex, flexible-duplex, and cross-split-duplex modes.

[0040] Embodiments of the present disclosure may be performed using test equipment such as signal generators, signal analyzers, spectrum analyzers, network analyzers, test terminal devices, test network devices, or channel emulators.

[0041] Embodiments of the present disclosure may be implemented in accordance with any generation of communication protocols currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.75G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G) communication protocols, 5.5G, 5G-Advanced Network, or sixth-generation (6G) networks.

[0042] As used herein, the term “circuit” may refer to a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of analog and / or digital hardware circuits and software / firmware. As a further example, a circuit may be any part of a software-equipped hardware processor, such as a digital signal processor, software, and memory, which work together to enable a device such as a terminal or network device to perform various functions. In yet another example, a circuit may be a hardware circuit and / or processor, such as a microprocessor or a part of a microprocessor, which requires software / firmware for operation but may not have software when not needed for operation. As used herein, the term “circuit” also encompasses implementations of hardware circuits or processors alone, or implementations of hardware circuits or parts of processors, as well as implementations of software and / or firmware associated with them.

[0043] Where used herein, the singular forms “a / an” and “the” are intended to include the plural unless otherwise clearly indicated in the context. The term “including” and its variations are interpreted as an open term meaning “including, but not limited to.” The term “based on” is interpreted as “at least partially based on.” The terms “one embodiment” and “embodiment” are interpreted as “at least one embodiment.” The term “another embodiment” is interpreted as “at least one other embodiment.” Terms such as “first,” “second,” etc., may refer to different or the same subject. The following may include other explicit and implicit definitions.

[0044] In some examples, values, procedures, or devices are referred to as “best,” “worst,” “highest,” “minimum,” “maximum,” etc. Such descriptions are intended to show that a choice can be made from among many functional options being used, and it will be understood that such a choice does not need to be better, smaller, higher, or more preferable than the other options.

[0045] Terminal devices such as UEs may perform cell reselection based on cell ranking criteria. For example, the following boxes provide some non-limiting descriptions of intra-frequency and inter-frequency cell reselection criteria of the same priority that are available in this disclosure. [Table 1] [Table 2]

[0046] As mentioned above, in the case of an UE in an RRC idle / inactive state, periodic paging monitoring and measurement consume a considerable amount of power on the UE side, which is important for terminal devices, especially power-constrained devices such as IoT devices and wearable devices. In the case of an UE in an RRC connected state, power saving is also an important feature for extending the battery life of terminal devices.

[0047] NR Release 18 (Rel-18) proposes low-power wake-up signals (LP-WUS). Considerations for LP-WUS may include studying and evaluating low-power signal and low-power wake-up receiver technologies to enable extremely low power consumption and low wake-up delay.

[0048] In existing Radio Resource Management (RRM) measurement procedures for RRC idle / inactive states, the UE should periodically perform measurements of the serving cell and / or adjacent cells using the main radio or main receiver (MR), and perform cell reselection based on the measurements. This consumes a considerable amount of power from the UE. To further reduce the UE's power consumption, offloading some of the RRM measurements to the LP-WUR may be considered. However, since there are differences between the MR and the LP-WUR, RRM measurements using the LP-WUR should be further studied.

[0049] Embodiments of this disclosure provide a communication solution. In these embodiments, a terminal device may perform MR and LP-WUR measurements on one or more adjacent cells. In some examples, the terminal device may perform cell reselection from one or more adjacent cells based on the MR and LP-WUR measurement values. This allows the terminal device to select a cell with a good balance between LP and MR signal coverage, thereby achieving better power saving gains. The principles and embodiments of this disclosure are described in detail below with reference to the drawings.

[0050] Figure 1A shows an exemplary communication system 100 that can implement several embodiments of the present disclosure. The communication system 100 is also called a network environment, network system, communication environment, communication network, etc., and the present disclosure is not limited to these embodiments. The communication system 100 includes a network device 110 and a terminal device 120. The network device 110 can provide services to the terminal device 120. For example, a serving cell may be provided by the network device 110.

[0051] In system 100, it is assumed that terminal device 120 is located within the coverage of network device 110. In some examples, the link from network device 110 to terminal device 120 is called a downlink (DL), and the link from terminal device 120 to network device 110 is called an uplink (UL). In a downlink, network device 110 is the transmitting (TX) device (or transmitter), and terminal device 120 is the receiving (RX) device (or receiver). In an uplink, terminal device 120 is the transmitting (TX) device (or transmitter), and network device 110 is the RX device (or receiver). In some embodiments, network device 110 and terminal device 120 can communicate over a direct link / channel. A DL may include, but is not limited to, one or more logical channels, including a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH). A UL may include, but is not limited to, one or more logical channels, including a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH). As used herein, the term "channel" may also refer to a carrier or a portion of a carrier consisting of a contiguous set of Resource Blocks (RBs) in which channel access procedures are performed within a shared spectrum.

[0052] In system 100, for example, communication between network device 110 and terminal device 120 may be carried out in accordance with any suitable communication protocol, including but not limited to cellular communication protocols such as first-generation (1G), second-generation (2G), third-generation (3G), fourth-generation (4G), and fifth-generation (5G), wireless local network communication protocols such as IEEE 802.11, and / or any other protocols currently known or to be developed in the future. Furthermore, appropriate wireless communication technologies may be used for communication, including but not limited to code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), frequency division duplexer (FDD), time division duplexer (TDD), multiple-input multiple-output (MIMO), orthogonal frequency division multiple access (OFDMA), and / or other technologies currently known or to be developed in the future.

[0053] Embodiments of the present disclosure can be applied to any suitable scenario. For example, embodiments of the present disclosure may be implemented in a reduced-capacity NR device. Alternatively, embodiments of the present disclosure may be implemented in any of the following: NR multi-input multi-output (MIMO), NR sidelink enhancement, NR systems at frequencies above 52.6 GHz, NR operational extension up to 71 GHz, Narrowband Internet of Things (NB-IoT) / enhanced machine type communication (eMTC) over non-terrestrial networks (NTN), NTN, UE power saving enhancement, NR coverage extension, NB-IoT and LTE-MTC, Integrated Access Backhaul (IAB), NR multicast broadcast service, or multi-radio dual connectivity enhancement.

[0054] The number of devices shown in Figure 1A (i.e., network devices 110 and terminal devices 120), as well as their connection relationships and types, should be understood to be illustrative only and without implying any limitation. System 100 may include any suitable number of devices adapted to carry out embodiments of the present disclosure.

[0055] In some exemplary embodiments, the terminal device 120 may include an LP-WUR and an MR, where the LP-WUR is used to receive the LP signal and the MR is used to transmit / receive other channels or signals besides the LP signal. For simplicity of explanation, the channels or signals transmitted / received by the MR may also be called MR signals, and these include, but are not limited to, the reception of PDCCH, PDSCH, Synchronization Signal Block (SSB), or the transmission of PUCCH, PUSCH, Sounding Reference Signal (SRS).

[0056] In some exemplary embodiments, the coverage of the LP signal and the MR signal may be the same or different. Figure 1B shows a schematic diagram 150 of the coverage of the LP signal and the MR signal, where, as shown in Figure 1B, the coverage of the LP signal 151 is smaller than the coverage of the MR signal 152. Figure 1C shows a schematic diagram 160 of the coverage of the LP signal and the MR signal, where, as shown in Figure 1C, the coverage of the LP signal 161 is similar to (approximately the same as or identical to) the coverage of the MR signal 162.

[0057] In some embodiments, the terminal device 120 may be in main mode to receive the MR signal. In some embodiments, the terminal device 120 may be in low-power mode to receive the LP signal. In some embodiments, the terminal device 120 may receive the MR signal and the LP signal simultaneously.

[0058] In some embodiments, the terminal device 120 may be in main mode. The terminal device 120 may receive / transmit normal DL / UL transmissions (e.g., PDSCH, PDCCH, PUSCH, PUCCH, etc.) in main mode using the main radio or main receiver. In the context of this disclosure, the terms “main radio” and “main receiver” may be used interchangeably. In this disclosure, the term “MR” may refer to the main radio and / or main receiver.

[0059] In some embodiments, the terminal device 120 may be in low-power mode. The terminal device 120 may receive LP signals in low-power mode using a low-power wake-up radio or a low-power wake-up receiver. In the context of this disclosure, the terms “low-power (LP) mode,” “deep sleep mode,” “ultra-deep sleep mode,” and “ultra-low power mode” may be used interchangeably, and the terms “low-power radio,” “ultra-low-power radio,” “low-power receiver,” “ultra-low-power receiver,” “wake-up receiver,” “low-power wake-up receiver,” and “low-power wake-up radio” may be used interchangeably. In this disclosure, the term “LP-WUR” may refer to a low-power wake-up receiver and / or a low-power wake-up radio.

[0060] In this disclosure, the term “low power (LP) mode” may mean a mode in which the terminal device 120 is not required to perform at least one of the following: paging monitoring, cell selection and reselection, measurement based on a synchronization signal block (SSB) or channel state information-reference signal (CSI-RS), PDCCH monitoring, UL transmission, etc., and the terminal device 120 is required to perform monitoring and / or detection of LP signals.

[0061] In this disclosure, the term "LP-WUR" may refer to a radio used in low-power mode for transmission / reception. In one embodiment, the LP-WUR may be independent of the MR and not used for transmission / reception of normal DL / UL transmissions. In another embodiment, the LP-WUR may share at least some of the components of the MR and may have lower power consumption than the MR.

[0062] In some embodiments, the terminal device 120 may use MR to perform at least one of the following: paging monitoring, cell selection and reselection, measurement based on SSB or CSI-RS, PDCCH monitoring, or UL transmission.

[0063] In some embodiments, the LP-WUR may be off or on. Figure 2 shows a schematic diagram of the main radio and low-power wake-up receiver 200. In Figure 2, the LP-WUR is shown as an ultra-low-power wake-up receiver. For example, as shown in 210, the LP-WUR may be off, and therefore the UE is in deep sleep mode. For example, as shown in 220, the LP-WUR may be on.

[0064] For UEs in an RRC idle / inactive state, the MR may be turned off or switched to deep sleep mode. The UE uses an LP-WUR to monitor the LP-WUS signal and decide whether to wake up the MR based on the detection of the LP-WUS. The LP-WUR is low cost and power consumption and may be independent of the MR or may share some components with the MR. The LP-WUS is generated based on on-off keying (OOK), amplitude shift keying (ASK), or frequency shift keying (FSK) modulation, which can be detected by the LP-WUR without power hunger processing, for example, based on envelope detection or energy detection.

[0065] As described above, the LP-WUR is used to receive the LP signal. In this disclosure, there may be two types of LP signals: a low-power synchronization signal (LP-SS) and a low-power wake-up signal (LP-WUS).

[0066] LP-SS, also known as Low Power Reference Signal (LP-RS), is used for synchronization, measurement, and / or beam measurement. LP-SS may be cell-specific or cell-group-specific (for example, multiple cells associated with the same Tracking Area Code (TAC) may have the same configuration for LP-SS). In some examples, terminal equipment 120 may expect that LP-SS will always be transmitted for each LP-SS occasion.

[0067] LP-WUS is used to notify terminal devices of wake-up information, for example, to notify terminal devices to wake up from LP mode, to notify terminal devices to remain in LP mode, or to notify terminal devices of a new configuration for LP signals. For example, LP-WUS may be used to instruct terminal device 120 to wake up from LP mode, for example, to start monitoring paging occasions for paging Downlink Control Information (DCI).

[0068] In some examples, LP-WUS may include a preamble portion and a payload portion, where the preamble portion is used for synchronization or measurement, and the payload portion contains wake-up information.

[0069] In some embodiments, the LP signal may be based on at least one amplitude modulation sequence, where the sequence may include symbols with higher amplitudes and symbols with lower amplitudes. In some examples, the amplitude modulation may include amplitude-shift keying (ASK), frequency-shift keying (FSK), or on-off keying (OOK) modulation. Specifically, on-off keying (OOK) modulation has been widely considered due to its very simple receiver architecture and ultra-low power consumption. Using OOK modulation, a receiver may detect the envelope or energy of a time-domain signal at a relatively low sampling rate without complex baseband processing. As an example, in the following disclosure, OOK modulation is considered as one of the amplitude modulations. The OOK modulation sequence may include at least one OOK on symbol and at least one OOK off symbol. For example, the on symbol and the off symbol may represent a symbol with a higher amplitude and a symbol with a lower amplitude, respectively. For example, FSK may utilize two or more frequency components to transmit information. This disclosure is not limited to these embodiments.

[0070] In some embodiments, the LP signal may occupy a set of time / frequency resources for the serving cell. Figure 3A shows a schematic diagram of resources 310 occupied by the LP signal as available in some exemplary embodiments of the present disclosure. In the frequency domain, the resources allocated to the LP signal 312 may overlap with a set of PRBs or subcarriers, i.e., the terminal device 120 may show a set of PRBs or subcarriers, and the frequency resources of the PRBs or subcarriers may be used by the LP signal 312. In the time domain, the resources allocated to the LP signal 312 may overlap with a set of OFDM symbols, i.e., the terminal device 120 may show a set of OFDM symbols, and the time resources of the OFDM symbols may be used by the LP signal 312.

[0071] In some examples, OOK modulation is used to generate an LP signal, where the OOK symbol may be an OOK-on symbol (indicated by a logical "1") or an OOK-off symbol (indicated by a logical "0"), where the OOK-on symbol has relatively high power and the OOK-off symbol has zero power or relatively low power.

[0072] It should be understood that OOK symbols may or may not be equal to OFDM symbols. Figure 3B shows a schematic diagram of OOK symbols 320 that can be used in some exemplary embodiments of this disclosure. As shown in Figure 3B, an OOK-on symbol or an OOK-off symbol may have a duration equal to the duration of the OFDM symbol. In this case, the OOK-on symbol and the OOK-off symbol are realized by a non-zero-power OFDM symbol and a zero-power OFDM symbol, respectively. Figure 3C shows a schematic diagram of OOK symbols 330 that can be used in some exemplary embodiments of this disclosure. As shown in Figure 3C, an OOK-on symbol or an OOK-off symbol may have a shorter duration than the OFDM symbol. In this case, the OOK-on symbol and the OOK-off symbol can be realized by DFT-s-OFDM or by independent time-domain generation.

[0073] It should be noted that, unless otherwise specified in this disclosure, the term "OFDM symbol" refers to the CP-OFDM symbol, or any variation of the OFDM symbol, such as DFT-s-OFDM, GI-OFDM, zero-CP OFDM, unique-word OFDM, etc.

[0074] In some embodiments, the LP signal may include a sequence of OOK symbols formed by at least one OOK-on symbol and at least one OOK-off symbol (e.g., “1010…1” as shown in Figures 3B-3C). In some embodiments, the OOK-on symbol has higher power, and the OOK-off symbol has lower power. In the context of this disclosure, the terms “power,” “energy,” “amplitude,” and “intensity” may be used interchangeably.

[0075] In some embodiments, the LP signal may be used to transmit a message containing a string of information bits. Encoding may be applied to the message prior to OOK modulation. For example, Manchester code may be used, where a bit "1" in the message may be encoded as "01" or "10", and a bit "0" in the message may be encoded as "10" or "01", thus the code rate may be equal to 1 / 2.

[0076] In this disclosure, the terminal device 120 may include MR and LP-WUR. The terminal device 120 may perform MR measurement (e.g., RRM measurement), which may also be called MR measurement. The terminal device 120 may perform LP-WUR measurement (e.g., RRM measurement), which may also be called LP-WUR measurement.

[0077] The measurement output may be determined by the terminal device 120 based on the measurement. In the context of this disclosure, the term “measured value” may be used to indicate a measurement output such as Received Signal Strength Indication (RSSI), Reference Signal Receiving Power (RSRP), Reference Signal Received Quality (RSRQ), Signal to Interference and Noise Ratio (SINR), or LP signal detection / false detection rate. The measured value may include MR measured value and / or LP-WUR measured value, where “MR measured value” means the measurement output of the MR measurement, and “LP-WUR measured value” means the measurement output of the LP-WUR measurement.

[0078] In this disclosure, the terminal device 120 may perform cell reselection. In the context of this disclosure, the term “cell selection value” may be used to indicate a value used to determine cell selection or cell reselection. In some examples, the cell selection value for a cell may be determined based on a measured value of the cell.

[0079] Further reference is made to Figure 4, which shows a signaling chart illustrating a communication process 400 according to some exemplary embodiments of this disclosure. For clarity only, the process 400 will be described with reference to Figure 1A. The process 300 may involve a network device 110 and a terminal device 120.

[0080] The network device 110 transmits configuration 422 to the terminal device 120 (420), where configuration 422 may instruct the terminal device 120 to perform an LP-WUR measurement. For example, the measurement may be an RRM measurement; in other words, configuration 422 may instruct the terminal device 120 to perform an LP-WUR RRM measurement. In some examples, configuration 422 may be transmitted via one or more of RRC, Medium Access Control (MAC) control elements (CE), or DCI.

[0081] The terminal device 120 receives configuration 422 (424), thereby configuring the terminal device 120 to perform RRM measurement by LP-WUR. The terminal device 120 performs LP-WUR measurement based on configuration 422 (440). For example, in 440, the terminal device 120 may perform measurement by LP-WUR (e.g., RRM measurement) based on configuration 422.

[0082] In some exemplary embodiments, the terminal device 120 may perform an LP-WUR measurement on the serving cell, i.e., a serving cell measurement by LP-WUR. In some examples, the serving cell measurement may be based on an LP signal which may include LP-SS and / or LP-WUS. In some examples, the serving cell measurement may be based on at least one SSB.

[0083] In some exemplary embodiments, the terminal device 120 may determine the LP-WUR quantifier value for the serving cell based on the serving cell measurement by LP-WUR. In some examples, the quantifier value may be RSRP, RSSI, RSRQ, or SINR, or the detection / false detection rate.

[0084] In some cases, when serving cell measurements are based on LP-SS, only OOK-on symbols may be considered in determining (or calculating) the intensity or power of the LP-SS; that is, OOK-off symbols with zero power are not used in the power / intensity calculation.

[0085] The terminal device 120 determines the LP-WUR cell selection value for the serving cell (450). In some exemplary embodiments, the LP-WUR cell selection value for the serving cell is determined based on the LP-WUR measurement value.

[0086] In some examples, the cell selection value may be a function of the measured value. For example, the function may be predefined or preconfigured by the network device 110. For example, the cell selection value may be equal to the measured value. For example, the cell selection value may be equal to the measured value plus / minus at least one offset value, where the at least one offset value may include a minimum required signal level / quality value for LP-WUS monitoring.

[0087] In this way, the terminal device 120 may derive an LP-WUR cell selection value for a serving cell based on a function of the LP-WUR measurement value for the serving cell.

[0088] Furthermore, or alternatively, the terminal device 120 may compare the LP-WUR cell selection value for the serving cell with a first threshold and determine whether the LP-WUR cell selection value for the serving cell is less than (or less than or equal to) the first threshold.

[0089] In some exemplary embodiments, the terminal device 120 may determine a first threshold that can be used to trigger an MR measurement. In some examples, the first threshold may be predefined. In some examples, the first threshold may be set by the network device 110.

[0090] In some exemplary embodiments, if the LP-WUR cell selection value for a serving cell is equal to (or greater than) a first threshold, the terminal device 120 may continue to perform LP-WUR measurements, such as measurements at 440. For example, the terminal device 120 does not perform MR measurements.

[0091] In some other exemplary embodiments, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a first threshold, the terminal device 120 may start an MR measurement, as shown in 460. In some examples, if the terminal device 120 determines that the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a first threshold, the terminal device 120 may start performing an MR measurement. For example, the terminal device 120 may wake up its MR.

[0092] In some embodiments, the terminal device 120 may perform MR measurement and stop LP-WUR measurement. For example, the terminal device 120 may stop monitoring LP-WUS and perform PO monitoring by MR based on a conventional PO monitoring mechanism.

[0093] In some examples, the terminal device 120 may perform a serving cell measurement by MR. Furthermore, or alternatively, if a condition is met (for example, the MR measurement value for the serving cell falls below a third threshold), the terminal device 120 should trigger an adjacent cell measurement within or between frequencies. In some examples, the terminal device 120 may initiate an MR measurement for one or more adjacent cells.

[0094] In some other embodiments, the terminal device 120 may perform MR measurements and still perform LP-WUR measurements and / or LP-WUS monitoring. In some examples, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a first threshold and greater than (or greater than) a second threshold, the terminal device 120 may start MR measurements while simultaneously continuing LP-WUR measurements and LP-WUS monitoring. For example, the second threshold is less than the first threshold. For example, the second threshold may be redefined or set by the network device 110. For example, the second threshold may be associated with the minimum required signal level / quality for LP-WUS monitoring.

[0095] In some other examples, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a second threshold, the terminal device 120 may perform one or more of the following actions: stop LP-WUR measurement, stop LP-WUS monitoring, monitor PO by MR, or perform a random access procedure. For example, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a second threshold, the terminal device 120 may stop its LP-WUR measurement or LP-WUS monitoring, and the terminal device 120 may fall back to a normal paging monitoring procedure, i.e., monitor PO by MR based on a conventional PO monitoring mechanism.

[0096] Furthermore, or alternatively, the terminal device 120 may transmit information to the network device 110, where the information indicates that the LP-WUR cell selection value for the serving cell is less than (or less than or equal to) a second threshold. For example, the information may include the LP-WUR cell selection value for the serving cell, or the LP-WUR measurement value for the serving cell. In some examples, the terminal device 120 may request the network device 110 to stop LP monitoring.

[0097] In some exemplary embodiments, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a second threshold, the terminal device 120 may perform an MR measurement and perform cell reselection based on the MR.

[0098] This means that some exemplary embodiments define whether the terminal device 120 still monitors LP-WUS and performs LP-WUR measurements after MR measurement has been activated.

[0099] Figure 5 shows a schematic diagram 500 of fallback according to some embodiments of the present disclosure. As shown in Figure 5, we assume that the coverage 510 of the LP signal is smaller than the coverage 520 of the MR signal.

[0100] When terminal device 120 is located at position 1, terminal device 120 performs LP-WUR measurement, and the LP-WUR cell selection value for the serving cell exceeds the first threshold.

[0101] When terminal device 120 moves from position 1 to position 2, the LP-WUR measurement value decreases. If the LP-WUR cell selection value for the serving cell falls below the first threshold (and above the second threshold), terminal device 120 should start MR measurement (to prepare for cell reselection), and simultaneously continue LP-WUR measurement and LP-WUS monitoring.

[0102] When terminal device 120 moves from position 2 to position 3, the LP-WUR measurement value decreases further. If the LP-WUR cell selection value for a serving cell falls below a second threshold, terminal device 120 should stop its LP-WUR measurement or LP-WUS monitoring and fall back to the normal paging monitoring procedure, or report the measurement value or cell selection value to network device 110.

[0103] Please understand that the example shown in Figure 5 is for illustrative purposes only, without any limitations, and that several other examples may also be applicable.

[0104] Since serving cell measurements may contribute significantly to power consumption when the terminal device 120 is in RRC idle / inactive mode, power may be saved by offloading serving cell measurements to LP-WUR. Cell reselection may be triggered when the terminal device 120 moves to the cell edge. Given the good coverage and measurement quality of SSB, it is beneficial to trigger MR measurements when cell reselection is required. However, once MR measurements are initiated, LP-WUR measurements may still be needed to evaluate the signal quality of the LP signal and assist in cell reselection. According to some exemplary embodiments described with reference to Figures 4-5, a trigger mechanism for cell reselection is defined, and the LP-WUR cell selection value for the serving cell is considered for cell reselection, thus making the criteria for cell reselection more accurate.

[0105] Further reference is made to Figure 6, which shows a signaling chart illustrating a communication process 600 according to some exemplary embodiments of this disclosure. For clarity only, the process 600 will be described with reference to Figure 1A. The process 300 may involve a network device 110 and a terminal device 120.

[0106] The network device 110 transmits configuration 622 to the terminal device 120 (620), where configuration 622 may instruct the terminal device 120 to perform cell measurements by MR and LP-WUR. For example, the cell measurements may be in-frequency cell measurements or inter-frequency cell measurements; in other words, the terminal device 120 may be configured to perform in-frequency cell measurements or inter-frequency cell measurements by both LP-WUR and MR. In some examples, configuration 622 may be transmitted via one or more of RRC, MAC CE, or DCI.

[0107] The terminal device 120 receives the configuration 622 (624), and based on the configuration 622, the terminal device 120 performs MR measurements and LP-WUR measurements on one or more adjacent cells (640). In some examples, one or more adjacent cells may include one or more in-frequency cells or inter-frequency cells.

[0108] In some embodiments, the terminal device 120 may consist of information of one or more neighboring cells, where the neighboring cell information may include the configuration of an LP-WUR measurement for the neighboring cell, for example, time and / or frequency resources for measuring the LP signal or SSB of the neighboring cell.

[0109] In some exemplary embodiments, the terminal device 120 may be configured to perform LP-WUR measurements, and the terminal device 120 may perform LP-WUR measurements on serving cells. In some examples, if the LP-WUR cell selection value for a serving cell is less than (or less than or equal to) a first threshold, the terminal device 120 may initiate MR measurements and perform, for example, MR measurements and LP-WUR measurements. A detailed explanation of the first threshold and the LP-WUR cell selection value for a serving cell may be found in Figures 4-5 above, which will not be repeated here for brevity.

[0110] In some examples, the terminal device 120 may perform MR measurements on the serving cell and one or more adjacent cells, and also perform LP-WUR measurements on the serving cell and one or more adjacent cells.

[0111] The terminal device 120 may determine the MR measurement value for the serving cell by MR measurement and the LP-WUR measurement value for the serving cell by LP-WUR measurement. The terminal device 120 may further determine the MR cell selection value for the serving cell based on the MR measurement value for the serving cell and the LP-WUR cell selection value for the serving cell based on the LP-WUR measurement value for the serving cell.

[0112] The terminal device 120 may determine one or more MR measurement values ​​for one or more adjacent cells by MR measurement, and one or more LP-WUR measurement values ​​for one or more adjacent cells by LP-WUR measurement. The terminal device 120 may further determine one or more MR cell selection values ​​for one or more adjacent cells based on one or more MR measurement values ​​for one or more adjacent cells, and one or more LP-WUR cell selection values ​​for one or more adjacent cells based on one or more LP-WUR measurement values ​​for one or more adjacent cells.

[0113] In some examples, for any cell (serving cell or adjacent cell) that has a set LP-WUR, the MR cell selection value and LP-WUR cell selection value for that cell may be determined.

[0114] Continuing to refer to Figure 6, the terminal device 120 performs cell reselection (660) based, for example, on both the MR cell selection value and the LP-WUR cell selection value.

[0115] In some exemplary embodiments, the terminal device 120 may determine a cell ranking value for each cell. For example, the terminal device 120 may determine a cell ranking value for each cell based on the MR measurement value and the LP-WUR measurement value. In some exemplary embodiments, the terminal device 120 may determine the rank of one or more adjacent cells based on the cell ranking value for each cell.

[0116] In some examples, the cell ranking value for a particular cell may be determined based on the MR cell selection value and the LP-WUR cell selection value for that particular cell. In some examples, the cell ranking value may also be called the cell ranking criterion.

[0117] In some examples, the cell ranking value for serving cells is R s It may also be expressed as R, and the cell ranking value relative to adjacent cells is Rn It may be represented. For example, R s and R n may each be defined by formulas (1) to (2). For example, R s and R n may each be defined by formulas (3) to (4). R s = Q meas,s + Q hyst - Qoffset temp + Q LP-WUR,s (1) R n = Q meas,n - Qoffset - Qoffset temp + Q LP-WUR,n (2) R s = Q meas,s + Q hyst - Qoffset temp - Q LP-WUR,s (3) R n = Q meas,n - Qoffset - Qoffset temp - Q LP-WUR,n (4)

[0118] In formulas (1) to (4), Q LP-WUR,s and Q LP-WUR,n each represent the LP - WUR cell selection values for the serving cell and the adjacent cell. In some examples, Q LP-WUR,s and Q LP-WUR,n are each regarded as two offset values for R s and R n .

[0119] In some examples, Q LP-WUR,s and Q LP-WUR,n may be the same, that is, Q LP-WUR,s = Q LP-WUR,n .

[0120] In some exemplary embodiments, the terminal device 120 may determine a cell selection value for each of the one or more adjacent cells based on at least one of the MR measurement values ​​for each of the one or more adjacent cells, or the LP-WUR measurement values ​​for each of the one or more adjacent cells, determine at least one candidate adjacent cell from the one or more adjacent cells based on the cell selection value for each of the one or more adjacent cells, and perform cell reselection from at least one candidate adjacent cell.

[0121] In some examples, if the first MR cell selection value for the first adjacent cell exceeds the MR cell selection value for the serving cell, and the first LP-WUR cell selection value for the first adjacent cell exceeds the LP-WUR cell selection value for the serving cell, then at least one candidate adjacent cell may include the first adjacent cell. In some examples, the terminal device 120 should re-select a new cell (e.g., the first adjacent cell) only if the MR and LP-WUR measurements of the new cell are better than those of the serving cell. In some examples, this may have a partial impact on the current specification, for example, the content of section 5.2.4.6 of TS 38.304 may be updated as follows: The UE should only re-select a new cell if the following conditions are met: Time interval (Treselection) RAT During this time, both the MR and LP-WUR measurements of the new cell are better than those of the serving cell, according to the cell reselection criteria defined above. The amount of time that has passed since UE camped in their current serving cell is greater than the time elapsed.

[0122] In some other examples, if the second cell selection value for the second adjacent cell is greater than or equal to the fourth threshold (or greater than the fourth threshold), then at least one candidate adjacent cell may contain the second adjacent cell.

[0123] For example, terminal device 120 may determine a fourth threshold, and if the LP-WUR cell selection value for the second adjacent cell is greater than or equal to the fourth threshold (or greater than the fourth threshold), the second adjacent cell may be added to at least one candidate adjacent cell. In other words, the second adjacent cell may be treated as a candidate adjacent cell and may be ranked and / or reselected.

[0124] In some exemplary embodiments, one or more adjacent cells or at least one candidate adjacent cell may be ranked or ordered. In some examples, the rank may be determined based on the priority of each cell. For example, adjacent cells with a higher priority may be more likely to be selected as the new cell.

[0125] In some cases, if the difference in MR cell selection values ​​between two adjacent cells is greater than or equal to a fifth threshold, the cell with the higher MR cell selection value is determined to have a higher priority for cell re-selection. For example, if the difference in MR cell selection values ​​(or the difference in ranking metric values, i.e., Rs or Rn) between the first and second cells is greater than the fifth threshold, the cell with the higher MR cell selection value (or higher ranking metric) will have a higher priority for cell re-selection.

[0126] In some other examples, if the difference in MR cell selection values ​​between two adjacent cells is less than or equal to the fifth threshold, the cell with the higher LP-WUR cell selection value is determined to have a higher priority for cell re-selection. For example, if the difference in MR cell selection values ​​(or the difference in ranking metric values, i.e., Rs or Rn) between the first and second cells is less than the fifth threshold, the cell with the higher LP-WUR cell selection value has a higher priority for cell re-selection.

[0127] As a result, the terminal device 120 may perform cell reselection based on both the MR cell selection value (determined by the MR measurement value) and the LP-WUR cell selection value (determined by the LP-WUR measurement value).

[0128] Furthermore, or alternatively, in some exemplary embodiments, the network device 110 may transmit information to the terminal device 120 about how to perform cell reselection. In some exemplary embodiments, the information may indicate one of the following: performing cell reselection based on MR and LP-WUR, performing cell reselection based on MR, or performing cell reselection based on LP-WUR. In some exemplary embodiments, the information may be transmitted via a System Information Block (SIB) or via an Information Element (IE).

[0129] In some examples, the information may instruct the terminal device 120 to perform cell reselection based on MR, and the terminal device 120 should perform cell reselection based on the MR cell selection value. In some other examples, the information may instruct the terminal device 120 to perform cell reselection based on LP-WUR, and the terminal device 120 should perform cell reselection based on the LP-WUR cell selection value. In some other examples, the information may instruct the terminal device 120 to perform cell reselection based on both MR and LP-WUR, and the terminal device 120 should perform cell reselection based on both the MR cell selection value and the LP-WUR cell selection value.

[0130] Figure 7 shows a schematic diagram 700 of cell reselection according to some embodiments of the present disclosure. As shown in Figure 7, assume that the serving cell is cell 1, provided by network device 110, having LP signal coverage 710 and MR signal coverage 720. There are two adjacent cells, cell 2 and cell 3. As shown in Figure 7, cell 2 is provided by network device 112, having LP signal coverage 712 and MR signal coverage 722. Cell 3 is provided by network device 114, having LP signal coverage 714 and MR signal coverage 724.

[0131] When terminal device 120 moves from position 1 to position 2, terminal device 120 may select cell 3 as its new cell. As shown in Figure 7, when terminal device 120 is located at position 2, it is within the coverage 714 and 724 of cell 3 and within the coverage 722 of cell 2, but outside the coverage 712 of cell 2. Specifically, the MR cell selection value for cell 2 may be better than the MR cell selection value for cell 3, but since cell 3 has a better LP-WUR cell selection value, terminal device 120 still selects cell 3.

[0132] If cell reselection is based solely on MR measurement, it should be understood that the terminal device 120 may reselect a cell having good MR signal quality. However, a selected cell having good MR signal quality may have low LP signal quality, which is not optimal for power saving. According to some exemplary embodiments described with reference to Figures 6-7, cell reselection may be performed based on both MR measurement and LP-WUR measurement. When the terminal device 120 is performing cell reselection, an LP-WUR cell selection value (which is determined based on the LP-WUR measurement value) may also be considered. This allows LP-WUR measurement to also be considered in cell reselection, enabling the terminal device 120 to select a cell with a good balance between LP signal coverage and MR signal coverage, thus achieving better power saving gains.

[0133] Further reference is made to Figure 8, which shows a signaling chart illustrating a communication process 800 according to some exemplary embodiments of this disclosure. For clarity only, the process 800 will be described with reference to Figure 1A. The process 300 may involve a network device 110 and a terminal device 120.

[0134] The network device 110 transmits configuration 822 to the terminal device 120 (820), where configuration 822 may instruct the terminal device 120 to perform cell reselection based on LP-WUR measurements. For example, LP-WUR measurements may include LP-WUR measurements for a serving cell and LP-WUR measurements for one or more adjacent cells. For example, the terminal device 120 may be configured to perform serving cell measurements by LP-WUR and intra-frequency cell measurements or inter-frequency cell measurements by LP-WUR.

[0135] The terminal device 120 receives configuration 822 (824), thereby configuring the terminal device 120 to perform cell reselection based on LP-WUR, that is, based on serving cell measurements and in-frequency cell measurements or inter-frequency cell measurements performed by LP-WUR.

[0136] The terminal device 120 performs cell reselection (840) based on the LP-WUR, according to the configuration 822.

[0137] In some exemplary embodiments, the terminal device 120 performs LP-WUR measurements on the serving cell and one or more adjacent cells. In some examples, the terminal device 120 may determine an LP-WUR measurement value for the serving cell based on the LP-WUR measurement for the serving cell. The terminal device 120 may also further determine an LP-WUR cell selection value for the serving cell based on the LP-WUR measurement value for the serving cell. In some examples, the terminal device 120 may determine one or more LP-WUR measurement values ​​for one or more adjacent cells based on the LP-WUR measurement for one or more adjacent cells. The terminal device 120 may also further determine one or more LP-WUR cell selection values ​​for one or more adjacent cells based on one or more LP-WUR measurement values ​​for one or more adjacent cells.

[0138] In some exemplary embodiments, the terminal device 120 may perform cell reselection based on the LP-WUR cell selection value for the serving cell and / or one or more LP-WUR cell selection values ​​for one or more adjacent cells.

[0139] In some exemplary embodiments, the terminal device 120 may select a new cell from one or more adjacent cells based, for example, on a cell reselection criterion. In some examples, the cell reselection criterion may be a cell reselection criterion based on LP-WUR. In some examples, the cell reselection criterion based on LP-WUR may be predefined or set by the network device 110. In some examples, the terminal device 120 may select a new cell having the highest LP-WUR cell selection value. In some examples, at least one candidate adjacent cell may be determined from one or more adjacent cells, for example, each of the at least one candidate adjacent cell having an LP-WUR cell selection value that is greater than or equal to (or greater than) a sixth threshold. For example, the sixth threshold may be predefined or set by the network device 110.

[0140] In some other exemplary embodiments, as shown in Figure 8, 860, the terminal device 120 may initiate MR measurement when a fallback condition is met. For example, the terminal device 120 may perform cell reselection based on the MR measurement.

[0141] In some examples, the fulfillment of a fallback condition may mean that the fallback condition is met or satisfied. In some examples, the fallback condition may include one or more of the following: the LP-WUR cell selection value for each of one or more adjacent cells is less than (or less than or equal to) a sixth threshold; the LP-WUR cell selection value for the serving cell is less than or less than or equal to a second threshold; at least one of one or more adjacent cells does not support LP-WUR; all of one or more adjacent cells do not support LP-WUR; an instruction to wake up the MR has been received from the network device; a radio access technology (RAT) handover has been performed and the further RAT does not support LP-WUR; a specific timer for the RRC connection establishment procedure is running; or a specific timer has expired.

[0142] For example, if there are no adjacent cells that meet the cell reselection criteria based on LP-WUR, the terminal device 120 may start performing an MR measurement and perform cell reselection based on the MR measurement. For example, the LP-WUR cell selection value for all of one or more adjacent cells is less than (or less than or equal to) the sixth threshold. For example, all of one or more adjacent cells and the serving cell have LP signal quality that exceeds acceptable limits.

[0143] For example, the LP-WUR cell selection value of the serving cell is smaller than (or less than or equal to) the second threshold. For example, if the quality of the LP signal of the serving cell is unacceptable, the terminal device 120 may wake up the MR to avoid connection failure.

[0144] For example, there may be at least one adjacent cell that does not support LP-WUR. For instance, if at least one adjacent cell is unable to perform an LP-WUR measurement, the terminal device 120 should rely on MR measurement.

[0145] For example, not all of one or more adjacent cells support LP-WUR. For example, if there are no cells that can be measured with LP-WUR, terminal device 120 should wake up MR.

[0146] For example, terminal device 120 receives information (e.g., transmitted by LP-WUS) from network device 110, where the received information indicates that the MR should be woken up. Alternatively, the received information may indicate that an MR measurement should be performed.

[0147] For example, terminal device 120 may wake up MR because inter-RAT measurement is performed by terminal device 120 and LP-WUR is not supported by other RATs.

[0148] For example, a specific timer for the RRC connection establishment procedure may be T300. For example, when T300 is started or operating, i.e., when terminal device 120 is in the RRC connection procedure, terminal device 120 may start performing the MR measurement. For example, when T300 expires, i.e., when the RRC connection procedure expires and fails, terminal device 120 may start performing the MR measurement.

[0149] Figure 9A shows a schematic diagram of a fallback 910 according to some embodiments of the present disclosure. As shown in Figure 9A, it is assumed that the LP signal coverage 911 is smaller than the MR signal coverage 915.

[0150] When terminal device 120 moves from position 1 to position 2, it is located outside the LP signal coverage 911 at position 2. If the LP-WUR cell selection value for the serving cell falls below a second threshold, terminal device 120 starts MR measurement. For example, terminal device 120 stops its LP-WUR measurement and LP-WUS monitoring and falls back to the normal paging monitoring procedure with MR.

[0151] Figure 9B shows a schematic diagram of a fallback 920 according to some embodiments of the present disclosure. As shown in Figure 9B, assume that the serving cell is cell 1, provided by network device 110, having LP signal coverage 921 and MR signal coverage 922. There are two adjacent cells, cell 2 and cell 3. As shown in Figure 9B, cell 2 is provided by network device 116, having MR signal coverage 926. Cell 3 is provided by network device 118, having MR signal coverage 928.

[0152] When terminal device 120 moves from position 1 to position 2, terminal device 120 may start MR measurement because neither cell 2 nor cell 3 supports LP-WUR. In other words, there are no adjacent cells that support LP-WUR.

[0153] According to the exemplary embodiment described with reference to Figures 8 to 9B, an MR measurement fallback mechanism is introduced. For example, if terminal device 120 moves to a coverage hole for LP signals or moves outside of LP signal coverage, it is beneficial to cause terminal device 120 to fall back to normal cell reselection to avoid cell reselection failure. For example, if terminal device 120 moves to an area where adjacent cells do not support LP-WUR, terminal device 120 should fall back to normal cell reselection. This may avoid connection failure and ensure communication between terminal device 120 and the network.

[0154] While some exemplary embodiments are described individually above, it should be understood that in some other exemplary embodiments, one or more of the above exemplary embodiments may be combined to form new exemplary embodiments.

[0155] According to the exemplary embodiment described above, a fallback mechanism is proposed when the measurement is offloaded to LP-WUR. For example, if the LP-WUR measurement cannot meet the requirements, the terminal device 120 may wake up the MR and perform the MR measurement. For example, the LP-WUR measurement may be used instead of the MR measurement when the channel condition is good, for example, when the measured value is high, and the fallback mechanism may trigger the terminal device 120 to wake up the MR to perform the MR measurement on the serving cell and / or one or more adjacent cells when the channel condition deteriorates.

[0156] Figure 10 shows a flowchart of an exemplary method 1000 implemented in a terminal device according to some embodiments of the present disclosure. For convenience of explanation, method 1000 will be described in terms of the terminal device 120 with reference to Figure 1A.

[0157] In block 1010, the terminal device 120 performs main radio (MR) measurement and low-power wake-up radio (LP-WUR) measurement on one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells. In block 1020, the terminal device 120 performs cell reselection from the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells.

[0158] In some exemplary embodiments, the terminal device 120 performs an LP-WUR measurement on the serving cell and determines the LP-WUR measurement value for the serving cell. In some exemplary embodiments, the terminal device 120 determines an LP-WUR cell selection value for the serving cell based on the LP-WUR measurement value for the serving cell. In some exemplary embodiments, if the LP-WUR cell selection value for the serving cell is less than or equal to a first threshold, the terminal device 120 starts an MR measurement on the serving cell.

[0159] In some exemplary embodiments, the terminal device 120 initiates MR measurement for one or more adjacent cells.

[0160] In some exemplary embodiments, if the LP-WUR cell selection value for a serving cell is less than or equal to a second threshold, the terminal device 120 performs at least one of the following: stopping LP-WUR measurement, stopping monitoring of low-power wake-up signals (LP-WUS), monitoring paging occasions by MR, or performing a random access procedure, where the second threshold is less than the first threshold.

[0161] In some exemplary embodiments, the terminal device 120 transmits information to the network device indicating that the LP-WUR cell selection value of the serving cell is less than or equal to a second threshold.

[0162] In some exemplary embodiments, if the MR measurement value for a serving cell is less than or equal to a third threshold, the terminal device 120 decides to perform measurements on one or more adjacent cells.

[0163] In some exemplary embodiments, the terminal device 120 determines a cell ranking value for each of the one or more adjacent cells based on the MR measurement value for each of the one or more adjacent cells and the LP-WUR measurement value for each of the one or more adjacent cells. In some exemplary embodiments, the terminal device 120 determines the rank of each of the one or more adjacent cells based on the cell ranking value for each of the one or more adjacent cells.

[0164] In some exemplary embodiments, the terminal device 120 determines a cell selection value for each of the one or more adjacent cells based on at least one of the MR measurement values ​​for each of the one or more adjacent cells, or the LP-WUR measurement values ​​for each of the one or more adjacent cells. In some exemplary embodiments, the terminal device 120 determines at least one candidate adjacent cell from the one or more adjacent cells based on the cell selection value for each of the one or more adjacent cells. In some exemplary embodiments, the terminal device 120 performs cell reselection from at least one candidate adjacent cell.

[0165] In some exemplary embodiments, the cell selection value for each of one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, and if the first MR cell selection value for a first adjacent cell exceeds the MR cell selection value for a serving cell, and the first LP-WUR cell selection value for a first adjacent cell exceeds the LP-WUR cell selection value for a serving cell, the terminal device 120 determines that at least one candidate adjacent cell includes the first adjacent cell.

[0166] In some exemplary embodiments, if the second cell selection value for the second adjacent cell is equal to or greater than the fourth threshold, the terminal device 120 determines that at least one candidate adjacent cell contains the second adjacent cell.

[0167] In some exemplary embodiments, the cell selection value for each of one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, and if the difference in MR cell selection values ​​between two adjacent cells is equal to or greater than a fifth threshold, the terminal device 120 determines that the cell with the higher MR cell selection value has a higher priority for cell reselection.

[0168] In some exemplary embodiments, the cell selection value for each of one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, and if the difference in MR cell selection values ​​between two adjacent cells is less than or equal to a fifth threshold, the terminal device 120 determines that the cell with the higher LP-WUR cell selection value has a higher priority for cell reselection.

[0169] In some exemplary embodiments, the terminal device 120 receives information from the network device indicating one of the following: to perform cell reselection based on MR and LP-WUR, to perform cell reselection based on MR, or to perform cell reselection based on LP-WUR.

[0170] In some exemplary embodiments, if the information indicates that cell reselection should be performed based on LP-WUR, the terminal device 120 performs cell reselection based on LP-WUR. If the fallback condition is met, the terminal device 120 starts performing cell reselection based on MR.

[0171] In some exemplary embodiments, the fallback conditions include at least one of the following: the LP-WUR cell selection value for each of one or more adjacent cells is less than or equal to a sixth threshold; the LP-WUR cell selection value for the serving cell is less than or equal to a second threshold; at least one of the one or more adjacent cells does not support LP-WUR; all of the one or more adjacent cells do not support LP-WUR; an instruction to wake up the MR has been received from the network device; a radio access technology (RAT) handover has been performed and the further RAT does not support LP-WUR; a specific timer for a radio resource control (RRC) connection establishment procedure has been activated; or a specific timer has expired.

[0172] In some exemplary embodiments, the terminal device 120 selects at least one adjacent cell having an LP-WUR cell selection value that is equal to or greater than the sixth threshold.

[0173] In some exemplary embodiments, the terminal device 120 receives a configuration from the network device indicating which of one or more adjacent cells does not support LP-WUR.

[0174] Figure 11 shows a flowchart of an exemplary method 1100 implemented in a network device according to some embodiments of the present disclosure. For convenience of explanation, the method 1100 will be described in terms of the network device 110 with reference to Figure 1A.

[0175] In block 1110, the network device 110 transmits information to the terminal device indicating one of the following: performing cell reselection based on the main radio (MR) and low-power wake-up radio (LP-WUR), performing cell reselection based on the MR, or performing cell reselection based on the LP-WUR.

[0176] In some exemplary embodiments, the network device 110 sends an instruction to the terminal device instructing it to wake up the MR.

[0177] In some exemplary embodiments, the network device 110 receives information from the terminal device indicating that the LP-WUR cell selection value of the serving cell is less than or equal to a second threshold.

[0178] In some exemplary embodiments, the network device 110 transmits a configuration to the terminal device indicating which of one or more adjacent cells does not support LP-WUR.

[0179] Details of several embodiments of this disclosure will be described with reference to Figures 1A to 11. Illustrative embodiments of terminal and network devices will be described below.

[0180] The terminal device includes a circuit configured to perform main radio (MR) measurement and low-power wake-up radio (LP-WUR) measurement for one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and to perform cell reselection from the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells.

[0181] In some exemplary embodiments, the terminal device includes a circuit configured to perform an LP-WUR measurement on a serving cell to determine the LP-WUR measurement value for the serving cell, determine an LP-WUR cell selection value for the serving cell based on the LP-WUR measurement value for the serving cell, and start an MR measurement on the serving cell according to the determination that the LP-WUR cell selection value for the serving cell is smaller than or equal to a first threshold.

[0182] In some exemplary embodiments, the terminal device includes a circuit configured to initiate MR measurement for one or more adjacent cells.

[0183] In some exemplary embodiments, the terminal device includes a circuit configured to perform at least one of the following actions when the LP-WUR cell selection value for the serving cell is less than or equal to a second threshold: stop the LP-WUR measurement; stop monitoring the low-power wake-up signal (LP-WUS); monitor the paging occasion by the MR; or perform a random access procedure, wherein the second threshold is less than the first threshold.

[0184] In some exemplary embodiments, the terminal device includes a circuit configured to transmit information to a network device indicating that the LP-WUR cell selection value of the serving cell is smaller than or equal to the second threshold.

[0185] In some exemplary embodiments, the terminal device includes a circuit configured to determine to perform a measurement on one or more adjacent cells if the MR measurement value for the serving cell is less than or equal to a third threshold.

[0186] In some exemplary embodiments, the terminal device includes a circuit configured to determine a cell ranking value for each of the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and to determine the rank of the one or more adjacent cells based on the cell ranking value for each of the one or more adjacent cells.

[0187] In some exemplary embodiments, the terminal device includes a circuit configured to determine a cell selection value for each of the one or more adjacent cells based on at least one of the MR measurement value for each of the one or more adjacent cells or the LP-WUR measurement value for each of the one or more adjacent cells, to determine at least one candidate adjacent cell from the one or more adjacent cells based on the cell selection value for each of the one or more adjacent cells, and to perform cell reselection from the at least one candidate adjacent cell.

[0188] In some exemplary embodiments, the cell selection value for each of one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value.

[0189] In some exemplary embodiments, the terminal device includes a circuit configured to determine that at least one candidate adjacent cell includes the first adjacent cell if the first MR cell selection value for the first adjacent cell exceeds the MR cell selection value for the serving cell, and the first LP-WUR cell selection value for the first adjacent cell exceeds the LP-WUR cell selection value for the serving cell.

[0190] In some exemplary embodiments, the terminal device includes a circuit configured to determine that at least one candidate adjacent cell includes the second adjacent cell if the second cell selection value for the second adjacent cell is greater than or equal to a fourth threshold, or greater than the fourth threshold.

[0191] In some exemplary embodiments, the terminal device includes a circuit configured to determine that, if the difference in MR cell selection values ​​between two adjacent cells is greater than or equal to a fifth threshold, the cell with the higher MR cell selection value among the two adjacent cells has a higher priority for re-selection of the cell.

[0192] In some exemplary embodiments, the terminal device includes a circuit configured to determine that, if the difference in MR cell selection values ​​between two adjacent cells is less than or equal to a fifth threshold, or less than a fifth threshold, the cell with the higher LP-WUR cell selection value among the two adjacent cells has a higher priority for re-selection of the cell.

[0193] In some exemplary embodiments, the terminal device includes a circuit configured to receive information from a network device indicating one of the following: to perform cell reselection based on the MR and the LP-WUR, to perform cell reselection based on the MR, or to perform cell reselection based on the LP-WUR.

[0194] In some exemplary embodiments, the terminal device includes a circuit configured to perform cell reselection based on the LP-WUR if the information indicates that cell reselection should be performed based on the LP-WUR, and to initiate cell reselection based on the MR if a fallback condition is met. The fallback condition includes at least one of the following: the LP-WUR cell selection value for each of the one or more adjacent cells is less than or equal to a sixth threshold; the LP-WUR cell selection value for the serving cell is less than or equal to a second threshold; at least one of the one or more adjacent cells does not support the LP-WUR; all of the one or more adjacent cells do not support the LP-WUR; an instruction to wake up the MR has been received from the network device; a radio access technology (RAT) handover has been performed and the further RAT does not support the LP-WUR; a specific timer for a radio resource control (RRC) connection establishment procedure is activated; or the specific timer has expired.

[0195] In some exemplary embodiments, the terminal device includes a circuit configured to select at least one adjacent cell having an LP-WUR cell selection value that is equal to or greater than the sixth threshold.

[0196] In some exemplary embodiments, the terminal device includes a circuit configured to receive a configuration from the network device indicating which of the one or more adjacent cells does not support the LP-WUR.

[0197] In some exemplary embodiments, the network device includes a circuit configured to transmit to a terminal device information indicating that it will perform cell reselection based on a main radio (MR) and a low-power wake-up radio (LP-WUR), that it will perform cell reselection based on the MR, or that it will perform cell reselection based on the LP-WUR.

[0198] In some exemplary embodiments, the network device includes a circuit configured to send an instruction to the terminal device instructing the terminal device to wake up the MR.

[0199] In some exemplary embodiments, the network device includes a circuit configured to receive information from the terminal device indicating that the LP-WUR cell selection value of the serving cell is less than or equal to a second threshold.

[0200] In some exemplary embodiments, the network device includes a circuit configured to transmit to the terminal device a configuration indicating which of one or more adjacent cells does not support the LP-WUR.

[0201] Figure 12 shows a simplified block diagram of a device 1200 suitable for carrying out embodiments of the present disclosure. Device 1200 can be considered as a further exemplary embodiment of the terminal and network devices described above. Thus, device 1200 may be implemented in a terminal device or a network device, or as at least a part thereof.

[0202] As shown in the figure, the device 1200 includes a processor 1210, a memory 1220 coupled to the processor 1210, a suitable transceiver 1240 coupled to the processor 1210, and a communication interface coupled to the transceiver 1240. The memory 1220 stores at least a portion of the program 1230. The transceiver 1240 may be for bidirectional or unidirectional communication, depending on the requirements. The transceiver 1240 may include at least one transmitter and receiver. The transmitter and receiver may be functional modules or physical entities. The transceiver 1240 has at least one antenna to facilitate communication, although in practice, the access node referred to in this application may have multiple antennas. The communication interface may represent any interface necessary for communication with other network elements, such as the X2 / Xn interface for bidirectional communication between eNBs / gNBs, the S1 / NG interface for communication between Mobility Management Entities (MMEs) / Access and Mobility Management Functions (AMFs) / Serving Gateways (SGWs) / User Plane Functions (UPFs) and eNBs / gNBs, the Un interface for communication between eNBs / gNBs and Relay Nodes (RNs), or the Uu interface for communication between eNBs / gNBs and terminal devices.

[0203] Program 1230 is assumed to include program instructions, and when the program is executed by the associated processor 1210, it enables the device 1200 to operate according to embodiments of the present disclosure, as described herein with reference to Figures 1A to 11. Embodiments of the present disclosure may be implemented by computer software executable by the processor 1210 of the device 1200, by hardware, or by a combination of software and hardware. The processor 1210 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1210 and memory 1220 may form processing means 1250 adapted to implement various embodiments of the present disclosure.

[0204] Memory 1220 may be of any type suitable for a local technology network and may be implemented using any suitable data storage technology, including but not limited to non-temporary computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. Although only one memory 1220 is shown in device 1200, device 1200 may contain multiple physically different memory modules. Processor 1210 may be of any type suitable for a local technology network and may include, but not limited to, one or more of the following: general-purpose computers, dedicated computers, microprocessors, digital signal processors (DSPs), and processors based on multicore processor architectures. Device 1200 may contain multiple processors, such as application-specific integrated circuit chips that are time-dependent to a clock synchronized with the main processor.

[0205] In summary, embodiments of this disclosure can provide the following solutions.

[0206] This disclosure provides a terminal device comprising at least one processor, wherein the processor is configured to cause the terminal device to perform at least one main radio (MR) measurement and low-power wake-up radio (LP-WUR) measurement for one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and to perform cell reselection from the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells.

[0207] In one embodiment, the terminal device described above is configured to further perform LP-WUR measurement on a serving cell to determine the LP-WUR measurement value for the serving cell, determine the LP-WUR cell selection value for the serving cell based on the LP-WUR measurement value for the serving cell, and start MR measurement on the serving cell according to the determination that the LP-WUR cell selection value for the serving cell is smaller than or equal to a first threshold.

[0208] In one embodiment, the terminal device described above is further configured to initiate MR measurement for one or more adjacent cells.

[0209] In one embodiment, the terminal device described above is further configured to perform at least one of the following actions based on a determination that the LP-WUR cell selection value for the serving cell is less than or equal to a second threshold: stop the LP-WUR measurement, stop monitoring the low-power wake-up signal (LP-WUS), monitor the paging occasion by the MR, or perform a random access procedure, where the second threshold is less than the first threshold.

[0210] In one embodiment, the terminal device described above is further configured to transmit information to a network device indicating that the LP-WUR cell selection value of the serving cell is smaller than or equal to the second threshold.

[0211] In one embodiment, the terminal device described above is further configured to decide to perform measurements on one or more adjacent cells based on the determination that the MR measurement value for the serving cell is smaller than or equal to a third threshold.

[0212] In one embodiment, the terminal device described above is configured to further determine a cell ranking value for each of the one or more adjacent cells based on the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells, and to determine the rank of the one or more adjacent cells based on the cell ranking value for each of the one or more adjacent cells.

[0213] In one embodiment, the terminal device described above is configured to further determine a cell selection value for each of the one or more adjacent cells based on at least one of the MR measurement value for each of the one or more adjacent cells or the LP-WUR measurement value for each of the one or more adjacent cells, determine at least one candidate adjacent cell from the one or more adjacent cells based on the cell selection value for each of the one or more adjacent cells, and perform cell reselection from the at least one candidate adjacent cell.

[0214] In one embodiment, in the terminal device described above, the cell selection value for each of the one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, wherein the terminal device is further configured to determine that at least one candidate adjacent cell includes a first adjacent cell, based on the determination that the first MR cell selection value for a first adjacent cell exceeds the MR cell selection value for a serving cell, and the first LP-WUR cell selection value for a first adjacent cell exceeds the LP-WUR cell selection value for a serving cell.

[0215] In one embodiment, the terminal device described above is further configured to determine that at least one candidate adjacent cell includes the second adjacent cell, based on whether the second cell selection value for the second adjacent cell is equal to or greater than the fourth threshold, or whether it is greater than the fourth threshold.

[0216] In one embodiment, in the terminal device described above, the cell selection value for each of the one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, wherein the terminal device is further configured to determine that, according to the determination that the difference between the MR cell selection values ​​between two adjacent cells is greater than or equal to a fifth threshold, or greater than the fifth threshold, the cell with the higher MR cell selection value among the two adjacent cells has a higher priority for re-selecting the cell.

[0217] In one embodiment, in the terminal device described above, the cell selection value for each of the one or more adjacent cells includes an MR cell selection value and an LP-WUR cell selection value, wherein the terminal device is further configured to determine that, according to the determination that the difference between the MR cell selection values ​​between two adjacent cells is less than or equal to a fifth threshold, or is less than the fifth threshold, the cell with the higher LP-WUR cell selection value among the two adjacent cells has a higher priority for re-selecting the cell.

[0218] In one embodiment, the terminal device described above is further configured to receive information from a network device indicating one of the following: to perform cell reselection based on the MR and the LP-WUR, to perform cell reselection based on the MR, or to perform cell reselection based on the LP-WUR.

[0219] In one embodiment, the terminal device is configured such that, in accordance with the determination that the information indicates that the cell reselection should be performed based on the LP-WUR, the terminal device performs the cell reselection based on the LP-WUR, and in accordance with the determination that the fallback condition is met, the terminal device starts performing the cell reselection based on the MR, where the fallback condition is that the LP-WUR cell selection value for each of the one or more adjacent cells is less than or equal to the sixth threshold, and the LP-WUR cell selection value of the serving cell is less than the second threshold. or at least one of the following: the value is below a second threshold; at least one of the one or more adjacent cells does not support the LP-WUR; all of the one or more adjacent cells do not support the LP-WUR; an instruction to wake up the MR has been received from the network device; a radio access technology (RAT) handover has been performed and the further RAT does not support the LP-WUR; a specific timer for the radio resource control (RRC) connection establishment procedure has been activated; or the specific timer has expired.

[0220] In one embodiment, the terminal device described above is configured to perform cell reselection based on the LP-WUR by selecting at least one adjacent cell having an LP-WUR cell selection value that is equal to or greater than the sixth threshold, or greater than the sixth threshold.

[0221] In one embodiment, the terminal device described above is further configured to receive a configuration from the network device indicating which of the one or more adjacent cells does not support LP-WUR.

[0222] This disclosure relates to a network device comprising at least one processor, wherein the processor is configured to cause the terminal device to transmit to the terminal device information indicating at least one of the following: performing cell reselection based on a main radio (MR) and a low-power wake-up radio (LP-WUR), performing cell reselection based on the MR, or performing cell reselection based on the LP-WUR.

[0223] In one embodiment, the network device is further configured to send an instruction to the terminal device instructing it to wake up the MR.

[0224] In one embodiment, the network device described above is further configured to receive information from the terminal device indicating that the LP-WUR cell selection value of the serving cell is smaller than or equal to a second threshold.

[0225] In one embodiment, the network device is further configured to transmit to the terminal device a configuration indicating which of the one or more adjacent cells does not support the LP-WUR.

[0226] This disclosure provides a communication method that includes operations performed on the terminal device described above.

[0227] This disclosure provides a communication method that includes operations performed on the network device described above.

[0228] This disclosure provides a terminal device comprising a processor and memory for storing computer program code, wherein the memory and computer program code are configured together with the processor to cause the terminal device to perform the methods performed by the terminal device described above.

[0229] This disclosure provides a network device comprising a processor and memory for storing computer program code, wherein the memory and computer program code are configured together with the processor to cause the network device to perform the methods performed by the network device described above.

[0230] This disclosure provides a computer-readable medium on which instructions are stored, and when executed by the processor of the device, the device causes the device to perform the methods performed by the terminal device or network device described above.

[0231] In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some embodiments may be implemented in hardware, while others may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device. Various embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or some other graphical representations, but it will be understood that any block, apparatus, system, technique, or method described herein may be implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controller, or other computing device, or some combination thereof, as non-limiting examples.

[0232] This disclosure also provides at least one computer program product tangibly stored on a non-temporary computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions contained in a program module, which are executed on a device on a target real or virtual processor, and perform the processes or methods described above, with reference to Figures 4 to 11. Generally, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc., that perform a specific task or implement a specific abstract data type. The functionality of program modules may be combined or separated as needed in various embodiments. The machine-executable instructions for a program module may be executed in a local or distributed device. In a distributed device, the program module may reside on both local and remote storage media.

[0233] Program code for performing the methods of this disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a dedicated computer, or other programmable data processing device, and when executed by the processor or controller, they perform the functions / operations specified in the flowcharts and / or block diagrams. The program code may run entirely on a machine, partially on a machine, as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0234] The above program code may be embodied in a machine-readable medium, which may be any tangible medium that contains or can store a program used by an instruction execution system, device, or apparatus, or a program used in conjunction with such a system or apparatus. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatus, or any suitable combination thereof. More specific examples of machine-readable storage media include electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM, or flash memory), optical fibers, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0235] Furthermore, although the operations are presented in a specific order, it should not be understood that such operations must be performed in the specific order shown, sequentially, or all shown operations in order to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous. Similarly, the above description includes some specific implementation details, but these should not be interpreted as limiting the scope of this disclosure, but rather as descriptions of features that may be specific to a particular embodiment. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. On the other hand, various features described in the context of a single embodiment may be implemented individually or in any suitable combination of sub-features in multiple embodiments.

[0236] While this disclosure is described in language specific to structural features and / or methodological actions, it should be understood that the disclosure as defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are disclosed as exemplary forms of implementing the claims.

Claims

1. A terminal device comprising at least one processor, wherein the processor provides at least, Main Radio (MR) measurement and Low Power Wake-up Radio (LP-WUR) measurement are performed on one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells. The system is configured to perform cell reselection from the one or more adjacent cells based on the MR measurement value for each of the one or more adjacent cells and the LP-WUR measurement value for each of the one or more adjacent cells. Terminal device.

2. The aforementioned terminal device further, LP-WUR measurement is performed on the serving cell to determine the LP-WUR measurement value for the serving cell. Based on the LP-WUR measurement value for the serving cell, the LP-WUR cell selection value for the serving cell is determined, and The system is configured to start MR measurement on the serving cell according to the determination that the LP-WUR cell selection value for the serving cell is smaller than or less than a first threshold. The terminal device according to claim 1.

3. The aforementioned terminal device further, The system is configured to start MR measurement for one or more adjacent cells. The terminal device according to claim 2.

4. The aforementioned terminal device further, In accordance with the determination that the LP-WUR cell selection value for the serving cell is less than or equal to the second threshold, To stop the LP-WUR measurement, To stop monitoring the Low Power Wake-Up Signal (LP-WUS), Monitoring the paging occasions by the aforementioned MR, or Performing a random access procedure, Configured to perform at least one of the following: Here, the second threshold is smaller than the first threshold. The terminal device according to claim 2.

5. The aforementioned terminal device further, The system is configured to transmit information to a network device indicating that the LP-WUR cell selection value of the serving cell is smaller than or less than the second threshold. The terminal device according to claim 4.

6. The aforementioned terminal device further, The system is configured to determine whether to perform measurements on one or more adjacent cells based on the determination that the MR measurement value for the serving cell is smaller than or equal to a third threshold. The terminal device according to claim 2.

7. The aforementioned terminal device further, Based on the MR measurement value for each of the one or more adjacent cells and the LP-WUR measurement value for each of the one or more adjacent cells, a cell ranking value is determined for each of the one or more adjacent cells, and The system is configured to determine the rank of one or more adjacent cells based on the cell ranking value for each of the one or more adjacent cells. The terminal device according to claim 1.

8. The aforementioned terminal device further, Based on at least one of the MR measurement values ​​for each of the one or more adjacent cells, or the LP-WUR measurement values ​​for each of the one or more adjacent cells, a cell selection value is determined for each of the one or more adjacent cells. Based on the cell selection value for each of the one or more adjacent cells, at least one candidate adjacent cell is determined from the one or more adjacent cells, and The system is configured to perform a reselection of the cell from the at least one candidate adjacent cell. The terminal device according to claim 1.

9. The cell selection value for each of the one or more adjacent cells includes the MR cell selection value and the LP-WUR cell selection value, where the terminal device further includes The system is configured to determine that at least one candidate adjacent cell includes the first adjacent cell, based on the determination that the first MR cell selection value for the first adjacent cell exceeds the MR cell selection value for the serving cell, and the first LP-WUR cell selection value for the first adjacent cell exceeds the LP-WUR cell selection value for the serving cell. The terminal device according to claim 8.

10. The aforementioned terminal device further, The system is configured to determine that at least one candidate adjacent cell includes the second adjacent cell, based on whether the second cell selection value for the second adjacent cell is equal to or greater than the fourth threshold, or whether it is greater than the fourth threshold. The terminal device according to claim 8.

11. The cell selection value for each of the one or more adjacent cells includes the MR cell selection value and the LP-WUR cell selection value, where the terminal device further includes The system is configured to determine, based on whether the difference in MR cell selection values ​​between two adjacent cells is greater than or equal to a fifth threshold, or greater than the fifth threshold, that the cell with the higher MR cell selection value among the two adjacent cells has a higher priority for re-selection of the cell. The terminal device according to claim 8.

12. The cell selection value for each of the one or more adjacent cells includes the MR cell selection value and the LP-WUR cell selection value, where the terminal device further includes The system is configured to determine that, based on whether the difference in MR cell selection values ​​between two adjacent cells is less than or equal to a fifth threshold, or less than a fifth threshold, the cell with the higher LP-WUR cell selection value among the two adjacent cells has a higher priority for re-selection of the cell. The terminal device according to claim 8.

13. The aforementioned terminal device further, From the network device, Re-selection of the cell based on the MR and the LP-WUR, Performing a reselection of the cell based on the aforementioned MR, or Performing the reselection of the cell based on the LP-WUR, It is configured to receive information indicating one of the following: The terminal device according to claim 1.

14. The aforementioned terminal device further, In accordance with the determination that the aforementioned information indicates that the cell reselection should be performed based on the LP-WUR, the cell reselection should be performed based on the LP-WUR, and The system is configured to initiate the re-selection of the cell based on the MR, in accordance with the determination that the fallback condition is met, where the fallback condition is: The LP-WUR cell selection value for each of the one or more adjacent cells is less than or equal to the sixth threshold, The LP-WUR cell selection value of the serving cell is less than or equal to the second threshold. At least one of the one or more adjacent cells does not support the LP-WUR. Not all of the aforementioned one or more adjacent cells support the LP-WUR. An instruction to wake up the aforementioned MR was received from the network device. A handover between Radio Access Technologies (RATs) is performed, and the subsequent RAT does not support the aforementioned LP-WUR. A specific timer for the Radio Resource Control (RRC) connection establishment procedure is activated, or The aforementioned specific timer has expired. Including at least one of the following: The terminal device according to claim 13.

15. The aforementioned terminal device is The system is configured to perform cell reselection based on the LP-WUR by selecting at least one adjacent cell having an LP-WUR cell selection value that is equal to or greater than the sixth threshold, or greater than the sixth threshold. The terminal device according to claim 14.

16. The aforementioned terminal device further, The network device is configured to receive a configuration indicating which of the one or more adjacent cells does not support the LP-WUR. The terminal device according to claim 14.

17. A network device comprising at least one processor, wherein the processor provides at least one, Performing cell reselection based on the main radio (MR) and low-power wake-up radio (LP-WUR), Performing a reselection of the cell based on the aforementioned MR, or Performing the reselection of the cell based on the LP-WUR, The system is configured to send information indicating one of the following to the terminal device. Network device.

18. A method of communication, In the terminal device, main radio (MR) measurement and low-power wake-up radio (LP-WUR) measurement are performed on one or more adjacent cells to determine the MR measurement value and the LP-WUR measurement value for each of the one or more adjacent cells. This includes performing cell reselection from the one or more adjacent cells based on the MR measurement value for each of the one or more adjacent cells and the LP-WUR measurement value for each of the one or more adjacent cells, Communication method.

19. A method of communication, In network devices, Performing cell reselection based on the main radio (MR) and low-power wake-up radio (LP-WUR), Performing a reselection of the cell based on the aforementioned MR, or Performing the reselection of the cell based on the LP-WUR, This includes transmitting information indicating one of the following to a terminal device. Communication method.

20. A computer-readable medium on which instructions are stored, wherein, when executed by the processor of the device, the instructions cause the device to perform the method according to any one of claims 18 to 19.

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