Mechanism for different monitoring configurations for wake-up signal
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-08-13
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Figure CN2025076343_13082026_PF_FP_ABST
Abstract
Description
MECHANISM FOR DIFFERENT MONITORING CONFIGURATIONS FOR WAKE-UP SIGNALFIELD
[0001] Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for different configurations for wake-up signal.BACKGROUND
[0002] Communication systems are designed and developed targeting for both mobile telephony and vertical use cases. Besides latency, reliability, and availability, user equipment (UE) energy efficiency is also a concerning aspect for the communication systems. Currently, devices such as UE may need to be recharged per week or day, depending on individual’s usage time. In general, devices consume tens of milliwatts in radio resource control (RRC) idle / inactive state and hundreds of milliwatts in RRC connected state. Designs to prolong battery life is a necessity for improving energy efficiency as well as for better user experience.
[0003] Energy efficiency is even more critical for UEs without a continuous energy source, e.g., UEs using small rechargeable and single coin cell batteries. Among vertical use cases, sensors and actuators are deployed extensively for monitoring, measuring, charging, etc. Generally, their batteries are not rechargeable and expected to last at least few years. Currently, UEs need to periodically wake up once per discontinuous reception (DRX) cycle, which dominates the power consumption in periods with no signaling or data traffic. If UEs are able to wake up only when they are addressed, e.g., by paging, power consumption could be dramatically reduced. This can be achieved by using a wake-up signal to trigger or wake-up a main radio of the UE. A separate receiver of the UE may have the ability to monitor wake-up signal with ultra-low power consumption. Main radio works for downlink reception as well as uplink transmission. Main radio is also responsible for cell (re) selection evaluation to ensure e.g., that the UE is camping on the best cell. Main radio can be set to different power state, such as a sleep mode.SUMMARY
[0004] In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: monitor, based on a first configuration, for a wake-up signal to wake up the first apparatus; perform a periodic uplink transmission to the second apparatus based on a periodic configuration; and after the periodic uplink transmission, monitor forat least one signal from the second apparatus based on a second configuration that is different from the first configuration.
[0005] In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus at least to: transmit, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; and receive, from the first apparatus, the periodic uplink transmission.
[0006] In a third aspect of the present disclosure, there is provided a method. The method comprises: monitoring, based on a first configuration, for a wake-up signal to wake up the first apparatus; performing a periodic uplink transmission to the second apparatus based on a periodic configuration; and after the periodic uplink transmission, monitoring for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.
[0007] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; and receiving, from the first apparatus, the periodic uplink transmission.
[0008] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for monitoring, based on a first configuration, monitoring for a wake-up signal to wake up the first apparatus; means for performing a periodic uplink transmission to the second apparatus based on a periodic configuration; and means for after the periodic uplink transmission, monitoring for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.
[0009] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for transmitting, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; and means for receiving, from the first apparatus, the periodic uplink transmission.
[0010] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the third aspect.
[0011] In an eighth aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the fourth aspect.
[0012] It is to be understood that the Summary section is not intended to identify key 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 become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Some example embodiments will now be described with reference to the accompanying drawings, where:
[0014] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0015] FIG. 2A and FIG. 2B illustrates example block diagrams of a first apparatus with a main radio and a wake-up receiver, respectively;
[0016] FIG. 3 illustrates an example signaling flow of monitoring for low power wake-up signal (LP-WUS) according to some example embodiments of the present disclosure;
[0017] FIG. 4 illustrates a schematic diagram of one example where UE changes the applied LP-WUS monitoring (period and wake-up offset) upon periodic UL transmission according to some other example embodiments of the present disclosure;
[0018] FIG. 5 illustrates another example signaling flow of monitoring for LP-WUS according to some example embodiments of the present disclosure;
[0019] FIG. 6 illustrates a flowchart of a method implemented at a first apparatus in accordance with some example embodiments of the present disclosure;
[0020] FIG. 7 illustrates a flowchart of a method implemented at a second apparatus in accordance with some example embodiments of the present disclosure;
[0021] FIG. 8 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and
[0022] FIG. 9 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0023] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0024] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0025] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0026] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0027] It shall be understood that although the terms “first, ” “second, ” …, etc. in front of noun (s) and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another and they do not limit the order of the noun (s) . For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0028] As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0029] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.
[0030] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0031] As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable) : (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0032] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0033] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) , 5.5G, the sixth generation (6G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0034] As used herein, the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.
[0035] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. The terminal device may also correspond to a Mobile Termination (MT) part of an IAB node (e.g., a relay node) . In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0036] As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block” (PRB) , “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other combination of the time, frequency, space and / or code domain resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains. The term “monitoring occasion” / “occasion” used herein may refer to a time domain resource that can be used for detecting / receiving signals. The term “monitor” used herein may refer to the observation, measurement, and analysis of various parameters, signals, and performance metrics within a communication system.
[0037] As used herein, the term “LP-SS” refers to a low-power synchronization signal, which is designed to operate with low power consumption, making it suitable for low-power or energy-constrained devices. The LP-SS allows devices to evaluate the serving cell, maintain timing accuracy and network synchronization without significantly draining power resources, enabling efficient operation in environments where preserving battery life is critical.
[0038] As used herein, the term “LP-WUS” refers to a low-power wake-up signal. LP-WUS is especially used in a scenario where devices are often in deep sleep modes to conserve energy. By using LP-WUS, these devices can remain in low-power states until they need to perform specific tasks, reducing the need for constant active operation and thereby extending battery life or optimizing energy harvesting resources.
[0039] As used herein, the term “SSB” refers to a synchronization signal block, which includes essential synchronization and broadcast signals for user equipment (UE) . The SSB enables devices to establish initial network connections by providing information such as cell identity, timing, and physical layer parameters.
[0040] FIG. 1 illustrates an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other. In the example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. The serving area of the network device 120 may be called a cell 102.
[0041] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be another device than a terminal device.
[0042] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0043] In some example embodiments, a transmission direction from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a transmission direction from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
[0044] Communications in the communication environment 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0045] As discussed above, energy efficiency is very critical for UEs without a continuous energy source, e.g., UEs using small rechargeable and single coin cell batteries. In some mechanisms, a wake-up signal (WUS) (also called low power WUS, LP-WUS) may be applied to trigger (e.g. wake-up) a main radio (MR) of a device. A separate receiver such as a low-power (LP) wake-up receiver (WUR) of the device may have the ability to monitor for wake-up signals with ultra-low power consumption. Main radio works for downlink reception including e.g., synchronization signal block (SSB) / system information / paging / data / control signaling transmission and reception as well as for uplink transmission including e.g., data and control signaling transmission. Main radio is also responsible for cell (re) selection evaluation to ensure e.g. that the UE is camping on the best cell. Main radio may be set in different power state. For example, the main radio may be turned off or set to (deep) sleep unless it is turned on.
[0046] In some solutions, it studies item on low-power Wake-up Signal (WUS) and Receiver (WUR) for NR. The study evaluated the usage of an additional low-power wake-up receiver (LP-WUR or shortly, LR) at the UE to reduce the overall UE power consumption. The defining principle behind this scheme is that the main radio / receiver (MR) of the UE can be put into a sleep mode (or even powered off) for power saving when not being needed for any processing (e.g., traffic / measurements) and then be easily woken up as and when required by the network upon the reception by the LP-WUR of a newly defined wake-up signal (WUS) . Basically, the network triggers the UE to wake-up exactly when needed in an event-driven manner, by transmitting a special WUS to the UE, which is monitored by the dedicated low-power WUS receiver (LP-WUR) at the UE. When a UE receives the WUS, the WUR receiver can trigger the wake-up of the ordinary NR MR transceiver and communication can start. Thus, the ultra-low power receiver wakes up the main radio, otherwise, the main radio can be OFF or kept in a deep sleep mode. The assumption is that the low-power wake-up receiver can be operated in an always ‘on’ manner with very low power consumption. In fact, it is expected that it will consume significantly less power compared to the NR transceiver, by designing a simple (WUS) signal and the use of dedicated hardware for its monitoring, which is only able to receive the WUS.
[0047] As used herein, when describing “using low power mode or LP-WUS” or “first apparatus in low power mode or LP-WUS mode” or “during LP-WUS operation” , the following cases may be considered. A first case relates to MR offloading to LR. That is, the terminal device 110 is offloading MR measurements to LR due to LP-WUS being used or configured. The measurements may be serving cell measurements or neighboring cell measurements. LR measurements are either Primary synchronization signal (PSS) or Secondary synchronization signal (SSS) based LP-WUS specific reference signal, such as LP-SS based. The offloading of MR may be full or partial. A second case relates to MR serving and / or neighbouring cell relaxation. That is, the terminal device 110 is relaxing MR and / or LR measurements due to thresholds being met where such operation is allowed for the terminal device 110. MR relaxation may mean that the measurements are more sparse than when in regular operation. A third case relates to LP-WUS monitoring. In this case, LR (or some implementations, some part of MR) , is monitoring specific LP-WUS reference signal that wakes up the terminal device 110. The terminal device 110 is or has entered LP-WUS monitoring and LP-WUS monitoring is active. The assumption in this case is that the terminal device110 also supports LP-WUS monitoring capability.
[0048] In order to achieve the UE power saving gain by LP-WUS / WUR, the RRM measurement on serving cell and neighboring cell via MR or LP-WUR is relaxed or may be stopped when UE is using LP-WUS or MR is in ultra-deep sleep.
[0049] Further, a study was initiated to properly define and specify a WUS to support the operation of UEs with LP-WUR was approved with the following objectives. One of the objectives is to specify an LP-WUS design commonly applicable to both IDLE / INACTIVE modes and CONNECTED modes. In this case, on-off keying (OOK) (OOK-1 and / or OOK-4) based LP-WUS with overlaid OFDM sequence (s) over OOK symbol is to be specified. As for IDLE / INACTIVE operation, the LP-WUS design ensures that the same information is delivered irrespective of LP-WUR type. In addition, the OFDM sequence may carry information. Furthermore, at least duty-cycled monitoring of LP-WUS may be supported.
[0050] The objectives for IDLE / INACTIVE modes include specifying procedure and configuration of LP-WUS indicating paging monitoring triggered by LP-WUS, which includes at least configuration, sub-grouping and entry / exit condition for LP-WUS monitoring. Furthermore, the objectives include specifying LP-SS with periodicity with Yms for LP-WUR, for synchronization and / or RRM for serving cell. In this case, LP-SS is based on OOK-1 and / or OOK-4 waveform with or without overlaid OFDM sequences. Further down selection between with and without overlaid OFDM sequences needs to be studied. It is noted that for LP-WUR that may receive conventional primary synchronization signal (PSS) / secondary synchronization signal (SSS) , the conventional PSS / SSS may be used for synchronization and RRM instead of LP-SS. In addition, Y will be decided later. 320ms is the start point. Moreover, the objectives include specifying further RRM relaxation of UE MR for both serving and neighboring cell measurements, and UE serving cell RRM measurement offloaded from MR to LP-WUR, which includes the necessary conditions.
[0051] The objectives for CONNECTED modes include specifying procedures to allow UE MR PDCCH monitoring triggered by LP-WUS which includes activation and deactivation procedure of LP-WUS monitoring, for example, for potential TU adjustment. It is noted that in CONNECTED mode, UE MR ultra-deep sleep is not considered, and UE RRM / radio link monitoring (RLM) / beam failure detection (BFD) / channel state information (CSI) measurements are performed by MR. In addition, a target coverage of LP-WUS and LP-SS may be the coverage of PUSCH for message3, and the optimization of LP-WUS signal design for IDLE / INACTIVE mode is prioritized over the optimization for connected mode.
[0052] Furthermore, the objectives for CONNECTED modes include specifying the necessary core requirement (s) to support the feature, which is to be further refined. For example, the objectives include specifying UE low-power wake-up receiver requirements, at least reference sensitivity power level (REFSENS) , adjacent channel selectivity (ACS) and adjacent channel selectivity for uplink subchannels (ASCS) requirements with consideration of possible new methodology to assess the low-power wake-up receiver performance. Guard resource blocks (RBs) are defined for ACS and ASCS cases. Testability of above requirements is also studied. Considering impacts of different architecture and impairments, requirements that enable all types of reasonable implementation are set. In addition, the objectives include studying and if necessary specifying or supporting by declaration, the corresponding BS requirements, e.g., dynamic range for LP-WUS / LP-SS. Moreover, necessary RRM requirements also need to be specified.
[0053] Additionally, MR RRM relaxation for serving cell is proposed. For example, in some cases, relaxation / scaling factor may be used for MR serving / neighboring cell relaxation to scale the measurement results, in other words, the relaxation factor can be called a scaling factor and it allows UE to measure less and save power. For instance, the relaxation factor may act as a multiplier (when > 1) for the measurement occasions for the UE. Relaxation factors may be within the range from 8 to 16 as the starting point for the relaxation factor, or the relaxation factor be selected from 1 to N where N is an integer. In some cases, the relaxation factor may be configured to be infinite, or maximum value range of the numerical field (e.g. FFFF in hexadecimal format) . If the relaxation factor is configured to be infinite, the UE, for instance, would not be required to perform any measurements or the number of measurements would be left up to UE implementation. Alternatively, the relaxation factor may be equal to 8 as the starting point. In some cases, the relaxation factor may be larger than or equal to 16. In some other cases, at least the scaling factor may be larger than that of legacy Rel-16 UE power saving. For MR neighboring cell measurement relaxation, the existing relaxed requirements can be used as baseline. For MR serving cell measurement relaxation, a scaling factor can be introduced. Further, it is still under discussion whether to use same scaling factor as neighboring cell measurement. In some cases, it further discusses scaling factor for MR RRM relaxation for serving and / or neighboring cell after scenario and detailed criterion for measurement relaxation have been clarified. Alternatively, the existing relaxation for scaling factor can be the starting point for MR RRM relaxation. Alternatively, the legacy intra- / inter-frequency and inter-RAT neighboring cell measurement requirements can be the baseline and RAN4 can study the relaxed scaling factor. Multiple values can be considered depending on conditions. Moreover, relaxation factor was intensively discussed for serving and neighboring cell measurements while UE is operating in LP-WUS mode.
[0054] In some example embodiments, it enables use of a separate low-power wake-up receiver (LR) at the UE, instead of the Main Receiver (MR) so that UE can reduce power consumption. For example, the terminal device 110 includes a main radio and a wake-up receiver such as a LP-WUR (LR) . In this case, the main receiver of the UE can be in a sleep mode (or even powered off) for power saving and be activated only upon the reception of the wake-up signal from the network.
[0055] FIG. 2A and FIG. 2B respectively illustrate example block diagrams of the terminal device 110 with a first receiver 210 (i.e., main radio / main receiver, such as, a NR transceiver) and a second receiver 220 (i.e., an LP-WUR which is also referred to as a LP-WUS receiver) . The second receiver 220 may monitor for WUS (s) 230 from the network device 120.
[0056] In some embodiments, the second receiver 220 may be operated in an always ‘on’ manner with very low power consumption. For example, the second receiver 220 may monitor for the WUS 230 during an idle / inactive mode and a connected mode. The second receiver 220 may consume significantly less power compared to the first receiver 210, by applying a simple WUS 230 and the use of dedicated hardware for its monitoring. For example, the second receiver 220 may be only able to or configured to receive the WUS 230. As shown in FIG. 2A, the WUS 230 is off, the first receiver 210 of terminal device 110 is in an off or deep sleep mode.
[0057] In some example embodiments, the network device 120 such as a network device may trigger the terminal device 110 to wake-up when needed in an event-driven manner, by transmitting a certain WUS 230 to the terminal device 110. The WUS 230 may be monitored by the second receiver 220, for example, an ultra-low power receiver. As shown in FIG. 2B, in response to receiving the WUS (s) 230, the second receiver 220 may trigger the wake-up of the ordinary NR transceiver and communication / normal operation may start. For example, the second receiver 220 such as the ultra-low power receiver wakes up the first receiver 210. The first receiver 210 thus may be switched into an on state or a no sleep mode. Otherwise, the first receiver 210 may be turned off or kept in a sleep mode, such as a deep sleep mode or an ultra-deep sleep mode.
[0058] As used herein, the turned off state, the turned-on state, sleep mode, a specific sleep mode among a plurality of different sleep modes, or no sleep mode of the first receiver 210 may be referred to as a power state of the first receiver 210. As used herein, the term “no sleep mode” may refer to a power state or mode in which the first receiver 210 of the terminal device 110 performs a channel monitoring and a channel measurement. The “no sleep mode” may also be referred to as a “normal mode” or “turned-on state. ” The channel monitoring may refer to physical downlink control channel (PDCCH) monitoring, physical downlink shared channel (PDSCH) monitoring or any other suitable monitoring. Examples of the channel measurement may include but not limited to a radio resource management (RRM) measurement, a radio link monitoring (RLM) measurement, a beam failure detection (BFD) measurement, a channel state information (CSI) measurement, a beam management (BM) measurement, idle-mode measurement, and / or the like.
[0059] The first receiver 210 power consumption depends on the configured length of wake-up periods, e.g., paging cycle. To meet the battery life requirements above, long eDRX cycle may be used, resulting in high latency, which is not suitable for such services with requirements of both long battery life and low latency. For example, in fire detection and extinguishment use case, fire shutters shall be closed and fire sprinklers shall be turned on by the actuators within 1 to 2 seconds from the time the fire is detected by sensors, long eDRX cycle cannot meet the delay requirements. eDRX is apparently not suitable for latency-critical use cases.
[0060] It is to be understood that although the first receiver 210 and the second receiver 220 are shown as separate components in FIG. 2A and FIG. 2B, in some example embodiments, the second receiver 220 may be implemented as part of the first receiver 210. That is, the corresponding part in the first receiver 210 will be operated in an always ‘on’ manner with very low power consumption, while remaining part of the first receiver 210 will be turned on and turned off for different scenarios.
[0061] In some examples, when wake-up signal is configured, for LP-WUS CONNECTED mode operation, the UE may perform LP-WUS monitoring according to the LP-WUS monitoring configuration before drx-onDurationTimer to trigger the starting of the drx-onDurationTimer. The UE may be configured with legacy connected DRX (C-DRX) configurations. For periodic channel sate information (CSI) / layer 1 reference signal received power (L1-RSRP) reporting, the UE can be configured with one of the following: periodic CSI / L1-RSRP is not reported during the time given by the configured drx-onDurationTimer if UE is not indicated to wake-up; periodic CSI / L1-RSRP is periodically reported during the time given by the configured drx-onDurationTimer regardless if UE is indicated to wake-up or not. Periodic CSI / L1-RSRP may be reported during CDRX active time.
[0062] In some other examples, for LP-WUS CONNECTED mode operation, the UE can be configured with a parameter to enable / disable periodic CSI / L1-RSRP reporting. For example, if the parameter is not configured and the UE is not indicated to wake up by LP-WUS, the periodic CSI / L1-RSRP is not reported. Alternatively, if the parameter is not configured and the UE is indicated to wake up by LP-WUS, the periodic CSI / L1-RSRP is reported during the DRX active time. As another example, if the parameter is configured and the UE is not indicated to wake up by LP-WUS, the periodic CSI / L1-RSRP is reported during the time given by the configured drx-onDurationTimer in DRX-Config for the case when UE is outside C-DRX active time. Alternatively, if the parameter is configured and the UE is indicated to wake up by LP-WUS, the periodic CSI / L1-RSRP is reported during the DRX active time.
[0063] In some examples, for RRC CONNECTED mode, the UE reports one value for each subcarrier spacing (SCS) from X candidate values for the determination of the minimum time gap between LP-WUS reception and MR to start PDCCH monitoring via UE capability reporting, where X is an integer. The UE can indicate its preference for configured time offset between LP-WUS and PDCCH reception using UAI mechanism. FFS details. UAI is optional.
[0064] Some solutions focus on the interaction of DL reception for LP-WUS and PDCCH monitoring. In some solutions, periodic UL transmission could be configured to be transmitted independent from LP-WUS reception. However, it has not been discussed much how the periodic UL transmissions interact with LP-WUS operation.
[0065] In accordance with some example embodiments of the present disclosure, there is provided a solution for the periodic UL transmissions interacting with LP-WUS operation. In particular, a terminal device monitors for LP-WUS from a network device based on a first configuration. After performing a periodic UL transmission, the terminal device monitors for a signal from the network device based on a second configuration that is different from the first configuration. In this way, it allows faster network response with shorter LP-WUS periodicity and / or smaller wake up offset for PDCCH monitoring after UL transmission.
[0066] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0067] FIG. 3 illustrates an example signaling flow 300 of monitoring for LP-WUS according to some example embodiments of the present disclosure. For the purpose of discussion, the signaling flow 300 will be described with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0068] In some example embodiments, the network device 120 may transmit (3010) configuration information to the terminal device 110. In other words, the terminal device 110 may receive (3010) the configuration information from the network device 120. In some example embodiments, the configuration information may include a periodic configuration for periodic uplink transmission. For example, the configuration information may indicate one or more resources allocated for periodic uplink transmission. Alternatively, or in addition, the configuration information may include one or more configurations for WUS monitoring. The configuration information may be transmitted (3010) via a dedicated signaling. For example, the configuration information may be transmitted via a RRC signaling.
[0069] The terminal device 110 monitors (3020) for a wake-up signal to wake up the terminal device 110 based on the first configuration. The wake-up signal may wake up the terminal device 110 from a low power mode. In some example embodiments, the first configuration may be configured by the network device 120. For example, the first configuration may be included in the transmitted (3010) configuration information. Alternatively, the first configuration may be predetermined at the terminal device 110.
[0070] In some example embodiments, the first configuration may indicate a first periodicity for monitoring for the wake-up signal. For example, the first periodicity may be configured by the network device 120 or predetermined at the terminal device 110. Alternatively, or in addition, the first configuration may indicate a first offset between reception of the wake-up signaling and monitoring for a downlink control signal. For example, the first offset may be predetermined as UE requirements or configured by the network device 120 based on UE capability. For example, as shown in FIG. 4, the first configuration may indicate monitoring occasions and a periodicity 440 of the monitoring occasions. In this case, the terminal device 110 may monitor for the wake-up signal at the monitoring occasions 410-1 and 410-2. It is noted that the number of monitoring occasions shown in FIG. 4 is only an example not limitation.
[0071] The terminal device 110 performs (3040) a periodic uplink transmission to the network device 120 based on the periodic configuration. For example, as shown in FIG. 4, the terminal device 110 may perform the periodic uplink transmission at a time instant 420. In some example embodiments, apart from DL reception, the terminal device 110 may be configured with one or more periodic uplink transmissions that can be used for channel estimation and / or uplink timing advance (TA) maintenance. For example, the periodic uplink transmission may include a periodic sounding reference signal (SRS) transmission. Alternatively, or in addition, the periodic uplink transmission may include a semi-persistent SRS transmission. In some example embodiments, the periodic uplink transmission may include a periodic CSI reporting. Alternatively, or in addition, the periodic uplink transmission may include a semi-persistent CSI reporting.
[0072] The terminal device 110 may determine (3050) a second configuration for monitoring for at least one signal from the network device 120. In some example embodiments, the second configuration may be configured by the network device 120. For example, the second configuration may be included in the transmitted (3010) configuration information. Alternatively, the second configuration may be predetermined at the terminal device 110.
[0073] In some example embodiments, the second configuration may indicate a second periodicity for monitoring for the wake-up signal. For example, the second periodicity may be predetermined at the terminal device 110 or configured by the network device 120 based on UE capability. Alternatively, or in addition, the second configuration may indicate a second offset between reception of the wake-up signaling and monitoring for a downlink control signal. For example, the second offset may be predetermined as UE requirements or configured by the network device 120 based on UE capability. For example, as shown in FIG. 4, the second configuration may indicate monitoring occasions and a periodicity 450 of the monitoring occasions.
[0074] In some example embodiments, the first periodicity is longer than the second periodicity. For example, as shown in FIG. 4, the periodicity 440 may be longer than the periodicity 450. In addition, the first offset may be larger than the second offset.
[0075] The terminal device 110 monitors (3060) for at least one signal from the network device 120 based on the second configuration which is different from the first configuration, after the periodic uplink transmission (3040) . For example, as shown in FIG. 4, the terminal device 110 may monitor for the signal from the network device 120 at the monitoring occasions 430-1, 430-2, 430-3 and 430-4. In this way, the response from the network device may be faster.
[0076] In some example embodiments, the terminal device 110 may switch to shorter periodicity LP-WUS reception (i.e., the second periodicity) for a period of time or a number of LP-WUS occasions. In this way, the network device 120 can respond to the UL transmission with lower latency (e.g. in case the network device 120 decides to update the TA upon UL reception) . Alternatively, the wake-up delay requirement (e.g. time offset between end of wake-up signal and the start of PDCCH monitoring occasion) for PDCCH monitoring is switched to a smaller value (i.e., the second offset) for the period of time or the number of occasions so that the terminal device 110 is required to be ready for PDCCH monitoring with shorter latency upon LP-WUS reception. In this way, it allows faster NW response with shorter LP-WUS periodicity and / or smaller wake up offset for PDCCH monitoring after UL transmission.
[0077] For example, as shown in FIG. 4, the terminal device 110 may monitor for the signal based on the second configuration for the period of time 460. In some example embodiments, after applying the second configuration, the terminal device 110 may start a timer of which running time is equal to the period of time 460. The period of time may be configured by the network device 120 or predetermined at the terminal device 110. Alternatively, the terminal device 110 monitors for at least one signal from the second apparatus based on the second configuration for a number of monitoring occasions. For example, as shown in FIG. 4, the terminal device 110 may monitor for the signal based on the second configuration for four monitoring occasions (i.e., the monitoring occasions 430-1, 430-2, 430-3 and 430-4) . The number of monitoring occasions may be configured by the network device 120 or predetermined at the terminal device 110. The number of monitoring occasions may be any suitable number.
[0078] In some example embodiments, if no response or wake-up signal is received within the period of time or after the number of monitoring occasions, the terminal device 110 may switch to a longer periodicity. Alternatively, if no response or wake-up signal is received within the period of time or after the number of monitoring occasions, the terminal device 110 may switch to a larger wake up offset for PDCCH monitoring. In this way, it still enables efficient power saving with longer LP-WUS periodicity / larger wake up offset with the possibility to go deeper sleep for the case of no response.
[0079] For example, the terminal device 110 may resume the monitoring for the wake-up signal from the second apparatus based on the first configuration, if there is no response for the periodic uplink transmission within the period of time or there is no wake-up signal within the period of time. By way of example, as shown in FIG. 4, if the terminal device 110 does not receive the response for the periodic uplink transmission within the period of time 460 or does not receive the wake-up signal within the period of time 460, the terminal device 110 may monitor for the wake-up signal at the monitoring occasions 410-3 and 410-4 which are indicated in the first configuration. Alternatively, if there is no response for the periodic uplink transmission after the number of monitoring occasions or there is no wake-up signal after the number of monitoring occasions, the terminal device 110 may resume the monitoring for the wake-up signal from the second apparatus based on the first configuration. By way of example, as shown in FIG. 4, if the terminal device 110 does not receive the response for the periodic uplink transmission at the monitoring occasions 430-1, 430-2, 430-3 and 430-4 or does not receive the wake-up signal at the monitoring occasions 430-1, 430-2, 430-3 and 430-4, the terminal device 110 may monitor for the wake-up signal at the monitoring occasions 410-3 and 410-4 which are indicated in the first configuration.
[0080] In some example embodiments, the terminal device 110 detects the wake-up signal, for example based on the first configuration or the second configuration. For example, the network device 120 may transmit the wake-up signal to the terminal device 110. In this case, based on the reception of the wake-up signal, the terminal device 110 may determine a set of resources for the signal based on the wake-up signal. For example, the terminal device 110 may start to decode PDCCH in a configured search space set and a control resource set (CORSET) . The terminal device 110 may then monitor (3060) for the signal on the set of resources based on the second configuration. For example, the signal may indicate a TA command, such as TA update. Alternatively, the signal may be any suitable downlink signal. The signal may be transmitted on PDCCH or PDSCH. For example, as shown in FIG. 4, the terminal device 110 monitors for the signal (for example, downlink control information) at the monitoring occasions 430-1, 430-2, 430-3 and 430-4. In some example embodiments, after receiving the signal conveying the TA update, the terminal device 110 may perform the TA update. In some example embodiments, after completing the TA update, the terminal device 110 may resume the monitoring for the wake-up signal based on the first configuration. For example, as shown in FIG. 4, if the terminal device 110 detects the signal indicating the TA update at one of the monitoring occasions 430-1, 430-2, 430-3 and 430-4, the terminal device 110 may monitor the wake-up signal at the monitoring occasions 410-3 and 410-4, after the completion of the TA update. Alternatively, after completing the TA update, the terminal device 110 may resume the monitoring for the wake-up signal based on the first configuration after a period of time. For example, after the period of time from the completion of the TA update, the terminal device 110 may monitor for the wake-up signal based on the first configuration. In some example embodiments, the period of time may be configured by the network device 120 or predetermined at the terminal device 110.
[0081] In some example embodiments, the terminal device 110 may not detect the wake-up signal, for example, based on the second configuration. For example, if the network device 110 determines no need for TA update, the network device 110 does not transmit the wake-up signal for the terminal device 110. In this case, the terminal device 110 may perform (3060) the signal (for example, wake-up signal) from the network device 120 based on the second configuration during running time of a timer. For example, the terminal device 110 may start the timer before applying the second configuration. By way of example, as shown in FIG. 4, if the terminal device 110 does not receive the wake-up signal, the terminal device 110 monitors for the wake-up signal at the monitoring occasions 430-1, 430-2, 430-3 and 430-4. In some example embodiments, if no signal is received before an expiration of the timer, the terminal device 110 resumes the monitoring for the wake-up signal from the network device 120 based on the first configuration. For example, as shown in FIG. 4, if the terminal device 110 does not receive the wake-up signal at the monitoring occasions 430-1, 430-2, 430-3 and 430-4, the terminal device 110 may monitor the wake-up signal at the monitoring occasions 410-3 and 410-4.
[0082] In some example embodiments, the wake-up signaling monitoring may be adapted after some time has expired since last UL TA adjustment by network. Alternatively, the wake-up signaling monitoring may be adapted after some time has expired since reset of UL timing advance timer (TAT) . In some other example embodiment, the second configuration is used after UL transmission when the TAT is not running while the first configuration is used when the TAT is running, or vice versa.
[0083] FIG. 5 illustrates an example signaling flow 500 of monitoring for LP-WUS according to some example embodiments of the present disclosure. The signaling flow 500 involves UE 510 and gNB 520. For example, the UE 510 may be implemented at the terminal device 110 and the gNB 520 may be implemented at the network device 120. The UE 510 is in a connected mode. When WUS configuration and periodic uplink transmission configuration are provided, the UE 510 may perform the operation in the connected mode.
[0084] The gNB 520 provides (5010) a UL transmission configuration and WUS with adaptation configuration via dedicated signaling. For example, the UL transmission configuration and WUS with adaptation configuration may be transmitted in RRC configuration.
[0085] The UE 510 applies (5020) a first WUS monitoring configuration. The UE may stop PDCCH monitoring.
[0086] The UE 510 sends (5030) a periodic UL transmission to the gNB 520. For example, the UE 510 may transmit a CSI report on PUCCH or SRS to the gNB 520.
[0087] The UE 510 starts to monitor (5040) for the WUS based on a second WUS monitoring configuration. Compared with the first WUS monitoring configuration, the second WUS monitoring configuration may include a shorter periodicity for monitoring the WUS.
[0088] In some example embodiments, the gNB 520 may transmit (5050) WUS to the UE 510. In this case, when the UE 510 detects the WUS, the UE 510 starts to decode (5060) PDCCH in configured search space set and CORESET. The gNB 520 transmits (5070) TA update for the UE 510. The UE 510 detects (5080) PDCCH and PDSCH conveying TA update and performs the TA update. The UE 510 resumes (5090) WUS monitoring and stops PDCCH monitoring immediately after TA update procedure or after some time.
[0089] In some other example embodiments, the gNB 520 does not transmit (5150) the WUS for the UE 510. In this case, the UE 510 monitors (5160) for the WUS based on the second WUS monitoring configuration for a duration. For example, the UE 510 may start a timer for monitoring the WUS based on the second WUS monitoring configuration. After the timer expires, the UE 510 resumes (5170) the WUS monitoring based on the first WUS monitoring configuration.
[0090] FIG. 6 shows a flowchart of an example method 600 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For example, the method 600 may be implemented at the terminal device 110 in FIG. 1.
[0091] At block 610, the first apparatus monitors, based on a first configuration, for a wake-up signal to wake up the first apparatus.
[0092] At block 620, the first apparatus performs a periodic uplink transmission to the second apparatus based on a periodic configuration.
[0093] At block 630, after the periodic uplink transmission, the first apparatus monitors for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.
[0094] In some example embodiments, the first configuration indicates at least one of: a first periodicity for monitoring for the wake-up signal to wake up the first apparatus, or a first offset between reception of the wake-up signal and monitoring for a downlink control signal; and wherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.
[0095] In some example embodiments, the first periodicity is longer than the second periodicity, and / or wherein the first offset is larger than the second offset.
[0096] In some example embodiments, the periodic uplink transmission comprises at least one of: a periodic sounding reference signal transmission, a semi-persistent sounding reference signal transmission, a periodic channel state information reporting, or a semi-persistent channel state information reporting.
[0097] In some example embodiments, the method 600 further comprises: based on a determination that the wake-up signal is detected based on the first configuration, determining a set of resources for the at least one signal based on the wake-up signal; and monitoring, based on the second configuration and on the set of resources, the at least one signal indicating a time advance update on a physical downlink shared channel.
[0098] In some example embodiments, the method 600 further comprises: performing the timing advance update; and resuming the monitoring for the wake-up signal based on the first configuration after a completion of the timing advance update.
[0099] In some example embodiments, the method 600 further comprises: performing the timing advance update; and resuming the monitoring for the wake-up signal based on the first configuration after a period of time.
[0100] In some example embodiments, the method 600 further comprises: performing the monitoring for the at least one signal from the second apparatus based on the second configuration during running time of a timer.
[0101] In some example embodiments, the method 600 further comprises: based on a determination of an expiration of the timer and no reception of signal before the expiration, resuming the monitoring for the wake-up signal from the second apparatus based on the first configuration.
[0102] In some example embodiments, the method 600 further comprises: monitoring for at least one signal from the second apparatus based on the second configuration for a period of time; or monitoring for at least one signal from the second apparatus based on the second configuration for a number of monitoring occasions.
[0103] In some example embodiments, the method 600 further comprises: resuming the monitoring for the wake-up signal from the second apparatus based on the first configuration, based on a determination of one of: no reception of response for the periodic uplink transmission within the period of time, no reception of wake up signal within the period of time, no reception of response for the periodic uplink transmission after the number of monitoring occasions, or no reception of wake up signal after the number of monitoring occasions.
[0104] In some example embodiments, at least one of the period of time or the number of monitoring occasions is predetermined or configured by the second apparatus.
[0105] In some example embodiments, at least one of the first configuration or the second configuration is predetermined or configured by the second apparatus.
[0106] In some example embodiments, the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.
[0107] FIG. 7 shows a flowchart of an example method 700 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For example, the method 700 will be implemented at the network device 120 in FIG. 1.
[0108] At block 710, the second apparatus transmits, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission.
[0109] At block 720, the second apparatus receives, from the first apparatus, the periodic uplink transmission.
[0110] In some example embodiments, the first configuration indicates at least one of: a first periodicity for monitoring for the wake-up signal to wake up the first apparatus , or a first offset between reception of the wake-up signal and monitoring for a downlink control signal; and wherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.
[0111] In some example embodiments, the first periodicity is longer than the second periodicity, and / or wherein the first offset is larger than the second offset.
[0112] In some example embodiments, the periodic uplink transmission comprises at least one of: a periodic sounding reference signal transmission, a semi-persistent sounding reference signal transmission, a periodic channel state information reporting, or a semi-persistent channel state information reporting.
[0113] In some example embodiments, the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.
[0114] In some example embodiments, a first apparatus capable of performing any of the method 600 (for example, the terminal device 110 in FIG. 1) may comprise means for performing the respective operations of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The first apparatus may be implemented as or included in the terminal device 110 in FIG. 1.
[0115] In some example embodiments, the first apparatus comprises means for monitoring, based on a first configuration, for a wake-up signal to wake up the first apparatus; means for performing a periodic uplink transmission to the second apparatus based on a periodic configuration; and means for after the periodic uplink transmission, monitoring for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.
[0116] In some example embodiments, the first configuration indicates at least one of: a first periodicity for monitoring for the wake-up signal to wake up the first apparatus, or a first offset between reception of the wake-up signal and monitoring for a downlink control signal; and wherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.
[0117] In some example embodiments, the first periodicity is longer than the second periodicity, and / or wherein the first offset is larger than the second offset.
[0118] In some example embodiments, the periodic uplink transmission comprises at least one of: a periodic sounding reference signal transmission, a semi-persistent sounding reference signal transmission, a periodic channel state information reporting, or a semi-persistent channel state information reporting.
[0119] In some example embodiments, the first apparatus further comprises: means for based on a determination that the wake-up signal is detected based on the first configuration, determining a set of resources for the at least one signal based on the wake-up signal; and means for monitoring, based on the second configuration and on the set of resources, the at least one signal indicating a time advance update on a physical downlink shared channel.
[0120] In some example embodiments, the first apparatus further comprises: means for performing the timing advance update; and means for resuming the monitoring for the wake-up signal based on the first configuration after a completion of the timing advance update.
[0121] In some example embodiments, the first apparatus further comprises: means for performing the timing advance update; and means for resuming the monitoring for the wake-up signal based on the first configuration after a period of time.
[0122] In some example embodiments, the first apparatus further comprises: means for monitoring for the at least one signal from the second apparatus based on the second configuration during running time of a timer.
[0123] In some example embodiments, the first apparatus further comprises: means for based on a determination of an expiration of the timer and no reception of signal before the expiration, resuming the monitoring for the wake-up signal from the second apparatus based on the first configuration.
[0124] In some example embodiments, the first apparatus further comprises: means for monitoring for at least one signal from the second apparatus based on the second configuration for a period of time; or means for monitoring for at least one signal from the second apparatus based on the second configuration for a number of monitoring occasions.
[0125] In some example embodiments, the first apparatus further comprises: means for resuming the monitoring for the wake-up signal from the second apparatus based on the first configuration, based on a determination of one of: no reception of response for the periodic uplink transmission within the period of time, no reception of wake up signal within the period of time, no reception of response for the periodic uplink transmission after the number of monitoring occasions, or no reception of wake up signal after the number of monitoring occasions.
[0126] In some example embodiments, at least one of the period of time or the number of monitoring occasions is predetermined or configured by the second apparatus.
[0127] In some example embodiments, at least one of the first configuration or the second configuration is predetermined or configured by the second apparatus.
[0128] In some example embodiments, the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.
[0129] In some example embodiments, a second apparatus capable of performing any of the method 700 (for example, the network device 120 in FIG. 1) may comprise means for performing the respective operations of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The second apparatus may be implemented as or included in the network device 120 in FIG. 1.
[0130] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; and means for receiving, from the first apparatus, the periodic uplink transmission.
[0131] In some example embodiments, the first configuration indicates at least one of: a first periodicity for monitoring for the wake-up signal to wake up the first apparatus , or a first offset between reception of the wake-up signal and monitoring for a downlink control signal; and wherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.
[0132] In some example embodiments, the first periodicity is longer than the second periodicity, and / or wherein the first offset is larger than the second offset.
[0133] In some example embodiments, the periodic uplink transmission comprises at least one of: a periodic sounding reference signal transmission, a semi-persistent sounding reference signal transmission, a periodic channel state information reporting, or a semi-persistent channel state information reporting.
[0134] In some example embodiments, the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.
[0135] FIG. 8 is a simplified block diagram of a device 800 that is suitable for implementing example embodiments of the present disclosure. The device 800 may be provided to implement a communication device, for example, the terminal device 110 or the network device 120 as shown in FIG. 1. As shown, the device 800 includes one or more processors 810, one or more memories 820 coupled to the processor 810, and one or more communication modules 840 coupled to the processor 810.
[0136] The communication module 840 is for bidirectional communications. The communication module 840 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interfaces may represent any interface that is necessary for communication with other network elements. In some example embodiments, the communication module 840 may include at least one antenna.
[0137] The processor 810 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0138] The memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 824, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , an optical disk, a laser disk, and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 822 and other volatile memories that will not last in the power-down duration.
[0139] A computer program 830 includes computer executable instructions that are executed by the associated processor 810. The instructions of the program 830 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 830 may be stored in the memory, e.g., the ROM 824. The processor 810 may perform any suitable actions and processing by loading the program 830 into the RAM 822.
[0140] The example embodiments of the present disclosure may be implemented by means of the program 830 so that the device 800 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 7. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0141] In some example embodiments, the program 830 may be tangibly contained in a computer readable medium which may be included in the device 800 (such as in the memory 820) or other storage devices that are accessible by the device 800. The device 800 may load the program 830 from the computer readable medium to the RAM 822 for execution. In some example embodiments, the computer readable medium may include any types of non-transitory storage medium, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0142] FIG. 9 shows an example of the computer readable medium 900 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 900 has the program 830 stored thereon.
[0143] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. Although various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0144] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer readable medium, such as a non-transitory computer readable medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target physical or virtual processor, to carry out any of the methods as described above. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0145] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. The program code may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0146] In the context of the present disclosure, the computer program code or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0147] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random-access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0148] Further, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Unless explicitly stated, certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated, various features that are described in the context of a single embodiment may also be implemented in a plurality of embodiments separately or in any suitable sub-combination.
[0149] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to:monitor, based on a first configuration, for a wake-up signal to wake up the first apparatus;perform a periodic uplink transmission to the second apparatus based on a periodic configuration; andafter the periodic uplink transmission, monitor for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.2.The first apparatus of claim 1, wherein the first configuration indicates at least one of:a first periodicity for monitoring for the wake-up signal to wake up the first apparatus , or a first offset between reception of the wake-up signal and monitoring for a downlink control signal; andwherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.3.The first apparatus of claim 2, wherein the first periodicity is longer than the second periodicity, and / orwherein the first offset is larger than the second offset.4.The first apparatus of any of claims 1-3, wherein the periodic uplink transmission comprises at least one of:a periodic sounding reference signal transmission,a semi-persistent sounding reference signal transmission,a periodic channel state information reporting, ora semi-persistent channel state information reporting.5.The first apparatus of any of claims 1-4, wherein the first apparatus is caused to:based on a determination that the wake-up signal is detected based on the first configuration, determine a set of resources for the at least one signal based on the wake-up signal; andmonitor, based on the second configuration and on the set of resources, the at least one signal indicating a time advance update on a physical downlink shared channel.6.The first apparatus of claim 5, wherein the first apparatus is caused to:perform the timing advance update; andresume the monitoring for the wake-up signal based on the first configuration after a completion of the timing advance update.7.The first apparatus of claim 5, wherein the first apparatus is caused to:perform the timing advance update; andresume the monitoring for the wake-up signal based on the first configuration after a period of time.8.The first apparatus of any of claims 1-4, wherein the first apparatus is caused to:monitor for the at least one signal from the second apparatus based on the second configuration during running time of a timer.9.The first apparatus of claim 8, wherein the first apparatus is caused to:based on a determination of an expiration of the timer and no reception of signal before the expiration, resume the monitoring for the wake-up signal from the second apparatus based on the first configuration.10.The first apparatus of any of claims 1-4, wherein the first apparatus is caused to:monitor for at least one signal from the second apparatus based on the second configuration for a period of time; ormonitor for at least one signal from the second apparatus based on the second configuration for a number of monitoring occasions.11.The first apparatus of claim 10, wherein the first apparatus is caused to:resume the monitoring for the wake-up signal from the second apparatus based on the first configuration, based on a determination of one of:no reception of response for the periodic uplink transmission within the period of time,no reception of wake up signal within the period of time,no reception of response for the periodic uplink transmission after the number of monitoring occasions, orno reception of wake up signal after the number of monitoring occasions.12.The first apparatus of claim 10, wherein at least one of the period of time or the number of monitoring occasions is predetermined or configured by the second apparatus.13.The first apparatus of any of claims 1-12, wherein at least one of the first configuration or the second configuration is predetermined or configured by the second apparatus.14.The first apparatus of any of claims 1-13, wherein the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.15.A second apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus at least to:transmit, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; andreceive, from the first apparatus, the periodic uplink transmission.16.The second apparatus of claim 15, wherein the first configuration indicates at least one of: a first periodicity for monitoring for the wake-up signal to wake up the first apparatus , or a first offset between reception of the wake-up signal and monitoring of a downlink control signal; andwherein the second configuration indicates at least one of: a second periodicity for monitoring for the wake-up signal, or a second offset between reception of the wake-up signal and monitoring for the downlink control signal.17.The second apparatus of claim 16, wherein the first periodicity is longer than the second periodicity, and / orwherein the first offset is larger than the second offset.18.The second apparatus of any of claims 15-17, wherein the periodic uplink transmission comprises at least one of:a periodic sounding reference signal transmission,a semi-persistent sounding reference signal transmission,a periodic channel state information reporting, ora semi-persistent channel state information reporting.19.The second apparatus of any of claims 15-18, wherein the first apparatus is or is comprised in a terminal device, and the second apparatus is or is comprised in a network device.20.A method comprising:monitoring, at a first apparatus and based on a first configuration, for a wake-up signal to wake up the first apparatus;performing a periodic uplink transmission to the second apparatus based on a periodic configuration; andafter the periodic uplink transmission, monitoring for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.21.A method comprising:transmitting, at a second apparatus and to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; andreceiving, from the first apparatus, the periodic uplink transmission.22.A first apparatus comprising:means for monitoring, based on a first configuration, for a wake-up signal to wake up the first apparatus;means for performing a periodic uplink transmission to the second apparatus based on a periodic configuration; andmeans for after the periodic uplink transmission, monitoring for at least one signal from the second apparatus based on a second configuration that is different from the first configuration.23.A second apparatus comprising:means for transmitting, to a first apparatus, configuration information comprising at least one of a first configuration for monitoring for a wake-up signal to wake up the first apparatus, a second configuration, or a periodic configuration for a periodic uplink transmission; andmeans for receiving, from the first apparatus, the periodic uplink transmission.24.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 20 or 21.