Devices and methods of communication
The terminal device optimizes paging monitoring by dynamically selecting POs based on predefined conditions, addressing inefficiencies and latency in LPWUS systems, enhancing power efficiency and network consistency.
Patent Information
- Application Number
- PCT/CN2023/142333
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-07-03
AI Technical Summary
Current paging monitoring methods using low-power wake-up signals (LPWUS) in terminal devices are inefficient and introduce latency due to unclear dynamic paging occasion (PO) selection, impacting power consumption and consistency with network devices.
A terminal device determines whether a condition for using a first set of POs is fulfilled, which are earlier than configured POs, and performs paging monitoring on these POs if the condition is met, or switches to legacy POs if not, thereby optimizing power usage and reducing latency.
This approach allows for flexible and efficient paging monitoring, reducing power consumption and ensuring consistent communication with network devices by dynamically selecting POs based on predefined conditions.
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Figure CN2023142333_03072025_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS OF COMMUNICATIONTECHNICAL FIELD
[0001] Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer storage media of communication for paging monitoring.BACKGROUND
[0002] Currently, it has been proposed to use a main radio (MR) to describe a regular communication device performing normal radio resource control (RRC) states and additionally design a lower-power wake-up signal (LPWUS) receiver to monitor an LPWUS for turn-on of the main radio. When a terminal device is not receiving a service, the terminal device may enter an LPWUS mode during which the main radio is turned off and the LPWUS receiver is turned on to monitor the LPWUS. When an LPWUS is received, the terminal device may turn off the LPWUS receiver and turn on the main radio so as to perform a paging monitoring. The paging monitoring in this case is still unclear and needs to be further developed.SUMMARY
[0003] In general, embodiments of the present disclosure provide methods, devices and computer storage media of communication for paging monitoring.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises a processor configured to cause the terminal device to: receive, from a network device, an LPWUS for the terminal device; determine that a condition of using a first set of paging occasions (POs) for a paging monitoring is fulfilled, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and perform the paging monitoring on the first set of POs.
[0005] In a second aspect, there is provided a terminal device. The terminal device comprises a processor configured to cause the terminal device to: receive, from a network device, an LPWUS for the terminal device; perform a first paging monitoring on a first set of POs, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and in accordance with a determination that no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed, perform a second paging monitoring on the available POs in the second set of POs.
[0006] In a third aspect, there is provided a terminal device. The terminal device comprises a processor configured to cause the terminal device to: receive, from a network device, an LPWUS for the terminal device in a first mode in which a main radio of the terminal device is turn off and an LPWUS receiver of the terminal device is turn on; determine a first set of POs based on a first configuration of a paging monitoring for the first mode, the first configuration being different from a second configuration of a paging monitoring for a second mode in which the main radio of the terminal device is turn on and an LPWUS receiver of the terminal device is turn off; and perform the paging monitoring on the first set of POs.
[0007] In a fourth aspect, there is provided a method of communication. The method comprises: receiving, at a terminal device and from a network device, an LPWUS for the terminal device; determining that a condition of using a first set of POs for a paging monitoring is fulfilled, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and performing the paging monitoring on the first set of POs.
[0008] In a fifth aspect, there is provided a method of communication. The method comprises: receiving, at a terminal device and from a network device, an LPWUS for the terminal device; performing a first paging monitoring on a first set of POs, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and in accordance with a determination that no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed, performing a second paging monitoring on the available POs in the second set of POs.
[0009] In a sixth aspect, there is provided a method of communication. The method comprises: receiving, at a terminal device and from a network device, an LPWUS for the terminal device in a first mode in which a main radio of the terminal device is turn off and an LPWUS receiver of the terminal device is turn on; determining a first set of POs based on a first configuration of a paging monitoring for the first mode, the first configuration being different from a second configuration of a paging monitoring for a second mode in which the main radio of the terminal device is turn on and an LPWUS receiver of the terminal device is turn off; and performing the paging monitoring on the first set of POs.
[0010] In a seventh aspect, there is provided a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor, cause the at least one processor to perform the method according to any of the fourth to sixth aspects of the present disclosure.
[0011] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0013] FIG. 1A illustrates an example communication network in which some embodiments of the present disclosure can be implemented;
[0014] FIG. 1B illustrates an example structure of a terminal device in which some embodiments of the present disclosure can be implemented;
[0015] FIG. 1C illustrates a diagram illustrating an LPWUS mechanism in which some embodiments of the present disclosure can be implemented;
[0016] FIG. 1D illustrates a diagram illustrating examples of a dynamic PO in which some embodiments of the present disclosure can be implemented;
[0017] FIG. 2 illustrates a signaling chart illustrating a process of communication according to embodiments of the present disclosure;
[0018] FIG. 3A illustrates a schematic diagram illustrating an example paging monitoring according to embodiments of the present disclosure;
[0019] FIG. 3B illustrates a schematic diagram illustrating another example paging monitoring according to embodiments of the present disclosure;
[0020] FIG. 3C illustrates a schematic diagram illustrating another example paging monitoring according to embodiments of the present disclosure;
[0021] FIG. 3D illustrates a schematic diagram illustrating another example paging monitoring according to embodiments of the present disclosure;
[0022] FIG. 4 illustrates a signaling chart illustrating another process of communication according to embodiments of the present disclosure;
[0023] FIG. 5 illustrates a schematic diagram illustrating another example paging monitoring according to embodiments of the present disclosure;
[0024] FIG. 6 illustrates a signaling chart illustrating another process of communication according to embodiments of the present disclosure;
[0025] FIG. 7 illustrates a schematic diagram illustrating another example paging monitoring according to embodiments of the present disclosure;
[0026] FIG. 8 illustrates a flowchart of an example method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure;
[0027] FIG. 9 illustrates a flowchart of another example method of communication implemented at a terminal device in accordance with some embodiments of the presentdisclosure;
[0028] FIG. 10 illustrates a flowchart of another example method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure; and
[0029] FIG. 11 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
[0030] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0031] Principle of the present disclosure will now be described with reference to some 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 limitations as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
[0032] 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.
[0033] As used herein, the term “terminal device” refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, 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, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for integrated access and backhaul (IAB) , small data transmission (SDT) , mobility, multicast and broadcast services (MBS) , positioning, dynamic / flexible duplex in commercial networks, reduced capability (RedCap) , Space borne vehicles or air borne vehicles in non-terrestrial networks (NTN) including Satellites and high altitude platforms (HAPs) encompassing unmanned aircraft systems (UAS) , extended reality (XR) devices including different types of realities such as augmented reality (AR) , mixed reality (MR) and virtual reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The “terminal device” can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple subscriber identity module (SIM) as known as multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0034] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , Network-controlled Repeaters, and the like.
[0035] The terminal device or the network device may have artificial intelligence (AI) or machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0036] The terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connections with the network devices under MR-DC application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0037] The network device may have the function of network energy saving, self-organizing networks (SON) / minimization of drive tests (MDT) . The terminal may have the function of power saving.
[0038] The embodiments of the present disclosure may be performed in test equipment, e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
[0039] In one embodiment, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device 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 eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In one embodiment, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In one embodiment, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0040] 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. The term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “at least in part based on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The terms “first, ” “second, ” and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0041] In some examples, values, procedures, or apparatus are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0042] In the context of the present disclosure, the term “aconnected state” may be interchangeably used with “an RRC_CONNECTED state” , the term “an idle state” may be interchangeably used with “an RRC_IDLE state” , and the term “an inactive state” may be interchangeably used with “an RRC_INACTIVE state” .
[0043] In the context of the present disclosure, the term “turn on” may be interchangeably used with “activated” , “wake up” , “switch on” , “state transition” or “warm up” . In the context of the present disclosure, the term “turn off” may be interchangeably used with “deactivated” , “sleep” , “switch off” , “state transition” , or “warm down” .
[0044] In the context of the present disclosure, for an inactive or idle state, the term “LPWUS mode” may mean that UE monitors an LPWUS within an inactive or idle state while a main radio is in ultra-deep-sleep or is non-active or is turned off. For a connected state, the term “LPWUS mode” may mean that UE monitors an LPWUS within a connected state while a main radio is in light-sleep or micro-sleep or is non-active or is turned off. The term “LPWUS mode” may be interchangeably used with “LPWUS state” , “a sleep mode” , “a sleep state” , “an ultra-deep sleep mode” , “an ultra-deep sleep state” , or any other suitable names.
[0045] In general, during an LPWUS mode, a main radio may stay in a sleep mode. A terminal device may still stay in any RRC state (e.g., an idle or inactive or connected state) but may not perform regular operations in those RRC states. The terminal device may only need to monitor an LPWUS or perform some actions related to an LPWUS mode, e.g., synchronization and / or measurement in an LPWUS mode.
[0046] In the context of the present disclosure, the term “LPWUS” is used to describe a signal sent by a network in an LPWUS mode and monitored by a low power receiver of a terminal device. The term “LPWUS” may be interchangeably used with “ultra-low-power wake up signal” or “wake up signal” or any other suitable names. The term “LPWUS-capable terminal device / cell” may refer to a terminal device / cell supporting an LPWUS mechanism.
[0047] The fifth generation (5G) devices consume tens of milliwatts in an idle or inactive state and hundreds of milliwatts in a connected state. Designing to prolong battery life is a necessity for improving energy efficiency as well as for better user experience. To meet battery life requirements, an enhanced discontinuous reception (eDRX) cycle with a large value is expected to be used. The eDRX cycle may result in high latency and thus is not suitable for services with requirements of both long battery life and low latency. For example, in fire detection and extinguishment use case, a long eDRX cycle cannot meet delay requirements. That is, eDRX is apparently not suitable for latency-critical use cases. Thus, it is expected to study an ultra-low power mechanism that can support low latency, e.g., lower than eDRX latency.
[0048] As mentioned above, an LPWUS mechanism has been proposed. In the LPWUS mechanism, a main radio is used to describe a regular communication device performing normal RRC states and an LPWUS receiver is additionally designed to monitor an LPWUS for turn-on of the main radio. When a terminal device is not receiving service, the terminal device may enter an LPWUS mode during which the main radio is turned off and the LPWUS receiver is turned on to monitor the LPWUS. The purpose of the LPWUS mechanism is also for power saving of the terminal device.
[0049] Currently, it has been discussed that a monitoring mode of an LPWUS may include a duty-cycle monitoring and a continuous monitoring. For the duty-cycle monitoring, a periodicity of an LPWUS may be unrelated to a paging cycle. That is, there is a possibility that an occasion (also referred to as an LPWUS occasion herein) for LPWUS monitoring may be far away from an occasion (also referred to as a PO herein) for paging monitoring, and thus the paging monitoring may be performed until a long time elapses after LPWUS reception. In this case, more latency may be introduced. In view of this, a dynamic PO monitoring has been proposed. For the dynamic PO monitoring, a terminal device may find a PO (also referred to as a dynamic PO herein) which is close to LPWUS reception as much as possible and perform a paging monitoring on the PO.
[0050] However, a dynamic PO has its own drawbacks. For example, the dynamic PO may have an impact on paging monitoring of other terminal devices (e.g., false alarm to other terminal devices) . Further, consistency between a terminal device and a network device is unclear for which one of POs is selected as the dynamic PO. Thus, it is not a good way to always use the dynamic PO upon LPWUS reception.
[0051] In view of this, embodiments of the present disclosure provide solutions of communication so as to enhance PO monitoring associated with LPWUS reception. In one aspect, upon reception of an LPWUS for a terminal device from a network device, the terminal device may determine whether a condition of using a first set of POs for a paging monitoring is fulfilled. The first set of POs is earlier than available POs in a second set of POs configured for the terminal device. If the condition is fulfilled, the terminal device may perform the paging monitoring on the first set of POs. In this way, a dynamic PO monitoring may be performed in a flexible and reasonable way.
[0052] In another aspect, upon reception of an LPWUS for a terminal device from a network device, the terminal device may perform a first paging monitoring on a first set of POs. The first set of POs is earlier than available POs in a second set of POs configured for the terminal device. If no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed, the terminal device may perform a second paging monitoring on the available POs in the second set of POs. In this way, a paging for a terminal device may be reliably received, and consistency between a terminal device and a network device may be enhanced.
[0053] In still another aspect, a terminal device may receive, from a network device, an LPWUS for the terminal device in a first mode in which a main radio of the terminal device is turn off and an LPWUS receiver of the terminal device is turn on. The terminal device may determine a first set of POs based on a first configuration of a paging monitoring for the first mode and perform the paging monitoring on the first set of POs. The first configuration is different from a second configuration of a paging monitoring for a second mode in which the main radio of the terminal device is turn on and an LPWUS receiver of the terminal device is turn off. In this way, a paging configuration dedicated for an LPWUS may be defined and a false alarm issue may be reduced by usage of the paging configuration.
[0054] In the context of the present disclosure, the term “a first set of POs” herein may refer to one or more dynamic POs associated with an LPWUS, the term “a second set of POs” herein may refer to one or more legacy POs associated with UE and derived from PO calculation formula (e.g., equations (1) and (2) described below) , the term “a first configuration” herein may refer to a newly defined paging configuration associated with an LPWUS, and the term “a second configuration” herein may refer to a legacy paging configuration indicating PO calculation related parameters.
[0055] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0056] EXAMPLE OF COMMUNICATION NETWORK
[0057] FIG. 1A illustrates a schematic diagram of an example communication network 100A in which some embodiments of the present disclosure can be implemented. As shown in FIG. 1A, the communication network 100A may comprise a terminal device 110 and network devices 120 and 130. The network device 120 may provide a serving cell (also referred to as a cell herein) 121 to serve one or more terminal devices. The access network device 130 may also provide a serving cell 131 to serve one or more terminal devices. In this example, the terminal device 110 is shown as being located in the cell 121 and served by the network device 120. In some embodiments, the network devices 120 and 130 may be the same network device. In some embodiments, the network devices 120 and 130 may be different network devices.
[0058] The network devices 120 and 130 may communicate with each other via an Xn interface. The terminal device 110 may communicate with any of the network device 120 and 130 via a Uu interface.
[0059] The terminal device 110 and any of the network device 120 and 130 may communicate with each other via a channel such as a wireless communication channel. The communications in the communication network 100 may conform to any suitable standards including, but not limited to, global system for mobile communications (GSM) , long term evolution (LTE) , LTE-evolution, LTE-advanced (LTE-A) , new radio (NR) , wideband code division multiple access (WCDMA) , code division multiple access (CDMA) , GSM EDGE radio access network (GERAN) , machine type communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, 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) communication protocols, 5.5G, 5G-advanced networks, or the sixth generation (6G) networks.
[0060] It is to be understood that the number of devices or cells in FIG. 1A is given for the purpose of illustration without suggesting any limitations to the present disclosure. The communication network 100A may include any suitable number of network devices and / or terminal devices and / cells adapted for implementing implementations of the present disclosure.
[0061] FIG. 1B illustrates a diagram 100B illustrating an example structure of a terminal device in which some embodiments of the present disclosure can be implemented. For convenience, FIG. 1B is described in connection with the terminal device 110 of FIG. 1A.
[0062] As shown in FIG. 1B, the terminal device 110 may comprise an LPWUS receiver 141 and a main radio 142. The LPWUS receiver 141 is configured to monitor an LPWUS. The main radio 142 is configured as a regular communication device performing normal RRC states. It is to be understood that the LPWUS receiver and the main radio may have any other suitable names.
[0063] In some embodiments, the LPWUS receiver 141 may detect the LPWUS indicating turn-off of the main radio 142, and trigger the main radio 142 to enter a turn-off or deep-sleep state. In the turn-off or deep-sleep state, the terminal device 110 is not required to process a RRC idle or inactive or connected state procedure. In some embodiments, the LPWUS receiver 141 may detect the LPWUS indicating turn-on of the main radio 142, and trigger the main radio 142 to enter a turn-on state. In the turn-on state, the main radio 142 may perform a PDCCH monitoring or perform a paging monitoring or directly initiate a random access (RA) procedure.
[0064] FIG. 1C illustrates a diagram 100C illustrating an LPWUS mechanism in which some embodiments of the present disclosure can be implemented. For convenience, FIG. 1C is described in connection with FIG. 1B. In this example, the turn-on state of the main radio 142 may correspond to any RRC state of the terminal device 110. As shown in FIG. 1C, when the terminal device 110 enters an LPWUS mode, the LPWUS receiver 141 turns on and monitors LPWUS occasions 151, and the main radio 142 turns off and does not monitor PDCCH occasions 161. When the LPWUS receiver 141 detects an LPWUS (for example, WUS=1) indicating turn-on of the main radio 142 at an LPWUS occasion as shown, the LPWUS receiver 141 triggers the main radio 142 to turn on and the LPWUS receiver 141 turns off. In this case, the LPWUS receiver 141 does not monitor LPWUS occasions 152 and the main radio 142 starts monitoring PDCCH occasions 162. Alternatively, upon RA completion, the main radio 142 may start monitoring the PDCCH occasions 162. In some embodiments, the PDCCH occasions 161 and 162 may be POs.
[0065] As mentioned above, a paging monitoring may be performed based on a dynamic PO upon reception of an LPWUS. A dynamic PO means that a terminal device finds a PO which is close to LPWUS reception as much as possible. FIG. 1D illustrates a diagram 100D illustrating examples of a dynamic PO in which some embodiments of the present disclosure can be implemented.
[0066] As shown in FIG. 1D, a reference sign 170 shows a case that a dynamic PO may be selected from POs configured for other terminal devices. In this example, a paging cycle T used by UE is 8 frames, number N of total paging frames (PFs) in T is 8, number Ns of POs for a PF is 1, and an offset PF_offset used for PF determination is 0. That is, there is only one PO for one UE in one paging cycle. It is assumed that an LPWUS for UE with a UE identity (ID) 6 is received. In this case, any of POs in SFN 0 to 5 may be selected as a dynamic PO for the UE with UE ID 6.
[0067] Continuing to refer to FIG. 1D, a reference sign 180 shows a case that a dynamic PO may be configured for a terminal device. As shown, an offset from LPWUS reception to a dynamic PO may be configured. That is, the dynamic PO may be an additional PO resource related to an LPWUS.
[0068] It is to be understood that FIG. 1D is merely an example, and a dynamic PO may be determined in any other suitable ways exiting or to be developed in future. The present disclosure does not limit this aspect.
[0069] As mentioned above, it is not a good way to always use a dynamic PO upon LPWUS reception. Thus, embodiments of the present disclosure provide solutions of communication for paging monitoring so as to flexibly and reasonably use a dynamic PO for paging monitoring. Detailed description will be given in connection with FIGs. 2 to 7 below.
[0070] EXAMPLE IMPLEMENTATION OF DETERMINATION OF USAGE OF DYNAMIC PO
[0071] This embodiment provides a solution of using a dynamic PO only if a certain condition is fulfilled. Detailed description will be given in connection with FIG. 2.
[0072] FIG. 2 illustrates a schematic diagram illustrating a process 200 of communication according to embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIGs. 1A and 1B. The process 200 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1A. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. For example, the order of the steps may be changed. Some of the steps may be omitted or any other suitable additional steps may be added. It is assumed that the terminal device 110 may be in an LPWUS mode initially. It is also assumed that a dynamic PO corresponds to a first set of POs, a legacy PO corresponds to a second set of POs, and the first set of POs is earlier than available POs in the second set of POs.
[0073] As shown in FIG. 2, the terminal device 110 may transmit 210, to the network device 120, information of capability of the terminal device 110. In some embodiments, the information of capability of the terminal device 110 may comprise a warm-up duration of the main radio 142 of the terminal device 110. It is to be understood that the information of capability of the terminal device 110 may also comprise any other suitable information.
[0074] With reference to FIG. 2, the network device 120 may transmit 220, to the terminal device 110, a configuration of LPWUS monitoring. The configuration of LPWUS monitoring may indicate a set of LPWUS occasions for LPWUS monitoring. It is to be understood that the configuration of LPWUS monitoring may also indicate any other suitable information.
[0075] With reference to FIG. 2, the network device 120 may transmit 230, to the terminal device 110, a configuration of paging monitoring. In some embodiments, the configuration of paging monitoring may indicate the first set of POs (i.e., the dynamic PO) for paging monitoring. For example, the configuration of paging monitoring may indicate a set of offsets to LPWUS reception corresponding to the first set of POs.
[0076] In some embodiments, the configuration of paging monitoring may indicate information associated with the second set of POs (i.e., the legacy PO) for paging monitoring. For example, the configuration of paging monitoring may indicate at least one of the following: a paging cycle, number of total PFs in the paging cycle, number of POs for a PF, or an offset used for PF determination. The terminal device 110 may determine the second set of POs based on the configuration of paging monitoring and an identity of the terminal device 110. For example, a system frame number for a PF for paging may be determined based on equation (1) below. (SFN+PF_offset) mod T = (T div N) × (UE_ID mod N) (1)
[0077] where SFN denotes a system frame number for a PF, PF_offset denotes an offset used for PF determination, T denotes a paging cycle of the terminal device 110, N denotes number of total PFs in T, and UE_ID denotes an identity of the terminal device 110.
[0078] Then an index of a PO may be determined based on equation (2) below. i_s= floor (UE_ID / N) mod Ns (2)
[0079] where i_sdenotes an index of a PO, UE_ID denotes an identity of the terminal device 110, N denotes number of total PFs in T, and Ns denotes number of POs for a PF. As such, the second set of POs may be determined.
[0080] In some embodiments, the configuration of paging monitoring may indicate both the first set of POs and the second set of POs. It is to be understood that the configuration of paging monitoring may also indicate any other suitable information.
[0081] Continuing to refer to FIG. 2, the network device 120 may transmit 240, to the terminal device 110, an LPWUS for the terminal device 110. The transmission of the LPWUS may be carried out in any suitable ways and the present disclosure does not limit this aspect.
[0082] With reference to FIG. 2, upon reception of the LPWUS, the terminal device 110 may determine 250 whether a condition of using the first set of POs (i.e., the dynamic PO) for paging monitoring is fulfilled. In other words, the terminal device 110 may determine whether the dynamic PO or the legacy PO is used for the paging monitoring upon reception of the LPWUS.
[0083] In some embodiments, the condition may be associated with a time offset (for convenience, also referred to as a first time offset herein) between a timing of reception of the LPWUS and a timing of a start of an available PO in the second set of POs. In some embodiments, the timing of the reception of the LPWUS may be a start of an LPWUS occasion in which the LPWUS is received. In some embodiments, the timing of the reception of the LPWUS may be an end of the LPWUS occasion in which the LPWUS is received. In some embodiments, the timing of the reception of the LPWUS may be an end of the warm-up duration of the main radio 142 of the terminal device 110. It is to be understood that the timing of the reception of the LPWUS may be defined in any other suitable ways.
[0084] In some embodiments, the condition may comprise the first time offset is greater than or equal to an offset threshold. In other words, if the first time offset is greater than or equal to the offset threshold, the terminal device 110 may determine to use the dynamic PO for paging monitoring. In some embodiments, if the first time offset is smaller than or equal to the offset threshold, the terminal device 110 may determine to use the legacy PO for paging monitoring. In some embodiments, the offset threshold may be predefined. In some embodiments, the offset threshold may be configured.
[0085] For illustration, an example will be described in connection with FIG. 3A. FIG. 3A illustrates a schematic diagram 300A illustrating an example paging monitoring according to embodiments of the present disclosure. For convenience, detailed description will be given in connection with the example of FIGs. 1A and 1B. As shown in FIG. 3A, the LPWUS receiver 141 of the terminal device 110 monitors LPWUS occasions in an LPWUS mode and receives an LPWUS on an LPWUS occasion 310. An available legacy PO closest to LPWUS reception is a PO 311. A dynamic PO is a PO 312. If a time offset 313 between a timing of reception of the LPWUS and a timing of a start of the legacy PO 311 is greater than or equal to the offset threshold, the main radio 142 of the terminal device 110 may decide to monitor the PO 312 (i.e., dynamic PO) as a response to the LPWUS reception. If the time offset 313 is smaller than or equal to the offset threshold, the main radio 142 of the terminal device 110 may decide to monitor the PO 311 (i.e., legacy PO) as a response to the LPWUS reception.
[0086] For illustration, an example procedure may be described below.
[0087] Upon reception of LPWUS, UE shall:
[0088] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0089] 2> if a time offset between the “LPWUS reception” and “the (first) start of the PO of the UE” is greater than threshold_TimeToMonitorDynamicPO:
[0090] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS;
[0091] 2> else (i.e., the time offset is lower than threshold_TimeToMonitorDynamicPO) :
[0092] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0093] In this example, threshold_TimeToMonitorDynamicPO denotes the offset threshold. When configured, if a time offset between “LPWUS reception” and “start of legacy PO” is greater than the offset threshold, the UE decides to monitor a dynamic PO as a response to LPWUS reception. Otherwise (i.e., the time offset is lower than the offset threshold) , the UE decides to monitor its own PO (i.e., legacy PO) based on paging calculation formula (e.g., the above equations (1) and (2) ) . A unit of the offset threshold may be frame or subframe or slot or symbol or ms or s or any other time units. In this example, the time point of LPWUS reception may be the start of LPWUS occasion, or at the end of LPWUS occasion, or at the end of warm-up of an LPWUS receiver. In this example, available POs may stand for the whole POs from network perspective including POs used for other UEs, and the UE may determine the number of available POs based on a paging configuration from the network (e.g., T, N and Ns as described above) .
[0094] In some embodiments, the condition may be associated with number of available POs of the first set of POs within the first time offset. In some embodiments, the condition may comprise the number of available POs of the first set of POs within the first time offset is greater than or equal to a number threshold. In other words, if the number of available POs of the first set of POs within the first time offset is greater than or equal to the number threshold, the terminal device 110 may determine to use the dynamic PO for paging monitoring. In some embodiments, if the number of available POs of the first set of POs within the first time offset is smaller than or equal to the number threshold, the terminal device 110 may determine to use the legacy PO for paging monitoring. In some embodiments, the number threshold may be predefined. In some embodiments, the number threshold may be configured.
[0095] For illustration, an example will be described in connection with FIG. 3B. FIG. 3B illustrates a schematic diagram 300B illustrating another example paging monitoring according to embodiments of the present disclosure. For convenience, detailed description will be given in connection with the example of FIGs. 1A and 1B. As shown in FIG. 3B, the LPWUS receiver 141 of the terminal device 110 monitors LPWUS occasions in an LPWUS mode and receives an LPWUS on an LPWUS occasion 320. An available legacy PO closest to LPWUS reception is a PO 321. A dynamic PO may be any of POs 322. If number of dynamic POs between a timing of reception of the LPWUS and a timing of a start of the legacy PO 321 is greater than or equal to the number threshold (e.g., 2) , the main radio 142 of the terminal device 110 may decide to monitor any of the POs 322 (i.e., dynamic PO) as a response to the LPWUS reception. If the number of dynamic POs between the timing of reception of the LPWUS and the timing of the start of the legacy PO 321 is smaller than the number threshold, the main radio 142 of the terminal device 110 may decide to monitor the PO 321 (i.e., legacy PO) as a response to the LPWUS reception.
[0096] For illustration, an example procedure may be described below.
[0097] Upon reception of LPWUS, UE shall:
[0098] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0099] 2> if the number of available POs before “the (first) start of the PO of the UE” is greater than threshold_NumToMonitorDynamicPO:
[0100] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS;
[0101] 2> else (i.e., the number of available POs is lower than threshold_NumToMonitorDynamicPO) :
[0102] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0103] In this example, threshold_NumToMonitorDynamicPO denotes the number threshold. When configured, the UE determine how many POs are available between “LPWUS reception” and “start of legacy PO” , if the number of available POs is greater than the number threshold, the UE decides to monitor a dynamic PO as a response to LPWUS reception. Otherwise (i.e., the number of available POs is lower than the number threshold) , the UE decides to monitor its own PO (i.e., legacy PO) based on paging calculation formula (e.g., the above equations (1) and (2) ) . In this example, the time point of LPWUS reception may be the start of LPWUS occasion, or at the end of LPWUS occasion, or at the end of warm-up of an LPWUS receiver. In this example, available POs may stand for the whole POs from network perspective including POs used for other UEs, and the UE may determine the number of available POs based on a paging configuration from the network (e.g., T, N and Ns as described above) .
[0104] In this way, a criterion to determine usage of a dynamic PO may be provided. If latency is not long, a terminal device may just use its own PO to make less impact on other terminal devices, which may reduce false alarm impact from system perspective.
[0105] In some embodiments, the condition may be associated with a time offset (for convenience, also referred to as a second time offset herein) between the timing of the reception of the LPWUS and a timing of a start of an available PO in the first set of POs. In some embodiments, the condition may be associated with the warm-up duration of the main radio 142 of the terminal device 110. In some embodiments, the condition may comprise the second time offset is greater than or equal to the warm-up duration of the main radio 142 of the terminal device 110. In other words, if the second time offset is greater than or equal to the warm-up duration of the main radio 142 of the terminal device 110, the terminal device 110 may determine to use the dynamic PO for paging monitoring. In some embodiments, if the second time offset is smaller than or equal to the warm-up duration of the main radio 142 of the terminal device 110, the terminal device 110 may determine to use the legacy PO for paging monitoring.
[0106] For illustration, an example will be described in connection with FIG. 3C. FIG. 3C illustrates a schematic diagram 300C illustrating another example paging monitoring according to embodiments of the present disclosure. For convenience, detailed description will be given in connection with the example of FIGs. 1A and 1B. It is assumed that a paging cycle broadcasted from the network device 120 is 128 radio frames (i.e., 1280ms) , and the warm-up duration of the main radio 142 of the terminal device 110 is 400ms.
[0107] In a scenario 330 as shown in FIG. 3C, the LPWUS receiver 141 of the terminal device 110 receives an LPWUS on an LPWUS occasion 331. An available legacy PO closest to LPWUS reception is a PO 332. An available dynamic PO is a PO 333, and an offset of the PO 333 to LPWUS reception is 300ms. In this case, a time offset (i.e., 300ms) between the timing of the reception of the LPWUS and the timing of the start of the PO 333 is smaller than the warm-up duration (i.e., 400ms) of the main radio 142 of the terminal device 110. Thus, the main radio 142 of the terminal device 110 may decide to monitor the PO 332 (i.e., legacy PO) as a response to the LPWUS reception.
[0108] In a scenario 330’ as shown in FIG. 3C, the LPWUS receiver 141 of the terminal device 110 receives an LPWUS on an LPWUS occasion 335. An available legacy PO closest to LPWUS reception is a PO 336. An available dynamic PO is a PO 337, and an offset of the PO 333 to LPWUS reception is 500ms. In this case, a time offset (i.e., 500ms) between the timing of the reception of the LPWUS and the timing of the start of the PO 337 is greater than the warm-up duration (i.e., 400ms) of the main radio 142 of the terminal device 110. Thus, the main radio 142 of the terminal device 110 may decide to monitor the PO 337 (i.e., dynamic PO) as a response to the LPWUS reception.
[0109] For illustration, an example procedure may be described below.
[0110] Upon reception of LPWUS, UE shall:
[0111] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0112] 2> if dynamic PO is an additional / dedicated PO resource configured for LPWUS reception, and,
[0113] 2> if a reported MR warm-up duration is lower than the offset between “LPWUS reception” and “the (first) start of its own PO” :
[0114] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use additional / dedicated PO for LPWUS;
[0115] 2> else (i.e., the reported MR wake-up duration is greater than the offset between “LPWUS reception” and “the (first) start of its own PO” ) :
[0116] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0117] In this example, the UE may report its capability of MR warm-up duration to the network via a UE capability procedure.
[0118] As such, a terminal device may be caused to reasonably use a dynamic PO considering its MR warm-up duration, and thus may avoid a failure on paging reception.
[0119] In some embodiments, the condition may be associated with a paging cycle used for the terminal device 110. In some embodiments, the condition may comprise the paging cycle used for the terminal device 110 is greater than or equal to a cycle threshold. In other words, if the paging cycle used for the terminal device 110 is greater than or equal to the cycle threshold, the terminal device 110 may determine to use the dynamic PO for paging monitoring. In some embodiments, if the paging cycle used for the terminal device 110 is smaller than or equal to a cycle threshold, the terminal device 110 may determine to use the legacy PO for paging monitoring. In some embodiments, the cycle threshold may be a predefined value, e.g., 32 radio frames (i.e., 320ms) , 64 radio frames (i.e., 640ms) , 128 radio frames (i.e., 12800ms) , or 256 radio frames (i.e., 2560ms) . In some embodiments, the cycle threshold may be configured.
[0120] For example, if a current broadcasted paging cycle is 128 radio frames and UE has not received a dedicated paging cycle from a network, the UE determines a used paging cycle is 1280 ms. It is assumed that the cycle threshold is 640 ms. As the used paging cycle is greater than the cycle threshold, i.e., a density of paging is sparse, the UE may use a dynamic PO instead of its own PO (i.e., legacy PO) .
[0121] For illustration, an example procedure may be described below.
[0122] Upon reception of LPWUS, UE shall:
[0123] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0124] 2> if the current used paging cycle (i.e., determined by the shortest T) is greater than “threshold (e.g., 640ms / 64 radio frames) ” :
[0125] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS;
[0126] 2> else (the current used paging cycle is lower than “threshold” ) :
[0127] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0128] In this example, “threshold” denotes the cycle threshold, and “T” denotes a configured paging cycle.
[0129] As such, if a terminal device is already configured with a dense paging monitoring, it is unnecessary to use a dynamic PO.
[0130] In some embodiments, the condition may be associated with a notification of common information for terminal devices. In some embodiments, the condition may comprise the notification of common information for terminal devices is carried in the LPWUS. In other words, if the notification of common information for terminal devices is carried in the LPWUS, the terminal device 110 may determine to use the dynamic PO for paging monitoring.
[0131] The common information means all terminal devices need to monitor POs. In some embodiments, the notification of the common information may be a short message. That is, the same content may be transmitted in all POs, and thus the terminal device 110 may monitor the dynamic PO immediately after LPWUS detection. In this way, a flexible solution may be provided to let a terminal device monitor a dynamic PO via the notification of common information within the LPWUS.
[0132] In some embodiments, the condition may be associated with an indication from the network device 120 indicating using the first set of POs for the paging monitoring. In some embodiments, the indication indicating using the first set of POs for the paging monitoring may be carried in the LPWUS. In other words, if the indication indicating using the dynamic PO for the paging monitoring, the terminal device 110 may determine to use the dynamic PO for paging monitoring. If the indication indicating disabling (i.e., not using) the dynamic PO for the paging monitoring, the terminal device 110 may determine to use the legacy PO for paging monitoring. In this way, a flexible solution may be provided to let a terminal device monitor a dynamic PO via the indication within the LPWUS.
[0133] For illustration, an example will be described in connection with FIG. 3D. FIG. 3D illustrates a schematic diagram 300D illustrating another example paging monitoring according to embodiments of the present disclosure. It is assumed that terminal devices are divided into two groups: group 1 and group 2. Group 1 includes UE1, and group 2 includes UE2 and UE3.
[0134] In a scenario 340 as shown in FIG. 3D, an LPWUS is received on an LPWUS occasion 341. The LPWUS comprises three bits {110} . The first bit 1 denotes an indication of using the dynamic PO. The second bit 1 denotes LPWUS information for group 1, e.g., UE1 is waken up. The third bit 0 denotes LPWUS information for group 2, i.e., UE2 and UE3 are not waken up. In this case, UE1 will monitor a dynamic PO 342, and none of UE1, UE2 and UE3 will monitor a legacy PO 343.
[0135] In a scenario 340’ as shown in FIG. 3D, an LPWUS is received on an LPWUS occasion 345. The LPWUS comprises three bits {010} . The first bit 0 denotes an indication of disabling the dynamic PO. The second bit 1 denotes LPWUS information for group 1, e.g., UE1 is waken up. The third bit 0 denotes LPWUS information for group 2, i.e., UE2 and UE3 are not waken up. In this case, UE1 will monitor a legacy PO 346, and none of UE1, UE2 and UE3 will monitor a dynamic PO 347.
[0136] For illustration, an example procedure may be described below.
[0137] Upon reception of LPWUS, UE shall:
[0138] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0139] 2> if the indication of monitoring a dynamic PO is included and set to 1:
[0140] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS;
[0141] 2> else (i.e., the indication field is not included or the indication is set to 0) :
[0142] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0143] 1> if the LPWUS is detected for common information, e.g., indicate short message:
[0144] 2> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS.
[0145] It is to be understood that a location or value of the indication of using the dynamic PO in the LPWUS is merely an example, and any other locations or values are also feasible.
[0146] In some embodiments, the indication indicating using the first set of POs for the paging monitoring may be carried in system information. In some embodiments, the indication indicating using the first set of POs for the paging monitoring may be carried in a radio resource control (RRC) signaling. As such, a network controlled solution may be provided to let a terminal device to monitor a dynamic PO, and thus the network may better control an issue of consistency between terminal and network sides.
[0147] For illustration, an example procedure may be described below.
[0148] Upon reception of LPWUS, the UE shall:
[0149] 1> if the LPWUS signal corresponding to the UE is detected:
[0150] 2> if the indication –monitorDynamicPO is set to true / configured via system information, or,
[0151] 2> if the indication –monitorDynamicPO is set to true / configured via dedicated RRC signaling:
[0152] 3> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS.
[0153] 2> else (no indication is received) :
[0154] 3> monitor the (first) UE its own PO based on paging calculation formula.
[0155] In this example, monitorDynamicPO denotes an indication of whether to use a dynamic PO. When set to true or configured, monitorDynamicPO indicates paged UE to monitor a dynamic PO (e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for the LPWUS) . Otherwise, the paged UE monitor its own PO (i.e., legacy PO) based on paging calculation formula (e.g., the above equations (1) and (2) ) .
[0156] Continuing to refer to FIG. 2, upon determination that the condition of using the first set of POs (i.e., the dynamic PO) for paging monitoring is fulfilled, the terminal device 110 may perform 260 the paging monitoring on the first set of POs. In some embodiments, the terminal device 110 may monitor one or more dynamic POs, e.g., one or more POs of other terminal devices.
[0157] With reference to FIG. 2, upon determination that the condition of using the first set of POs (i.e., the dynamic PO) for paging monitoring is not fulfilled, the terminal device 110 may perform 270 the paging monitoring on an available PO in the second set of POs (i.e., the legacy PO) . It is to be understood that the network device 120 may determine a PO in a way consistent with that used at the terminal device 110 and perform a paging transmission on the PO. Other details are not repeated here for conciseness.
[0158] So far, a solution of determining whether to use a dynamic PO is described. In this way, a dynamic PO monitoring may be performed in a flexible and reasonable way.
[0159] EXAMPLE IMPLEMENTATION OF COMBINATION OF DYNAMIC PO AND LEGACY PO
[0160] This embodiment provides a solution of using a dynamic PO and a legacy PO jointly. Detailed description will be given in connection with FIG. 4.
[0161] FIG. 4 illustrates a schematic diagram illustrating another process 400 of communication according to embodiments of the present disclosure. For the purpose of discussion, the process 400 will be described with reference to FIGs. 1A and 1B. The process 400 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1A. It is to be understood that the steps and the order of the steps in FIG. 4 are merely for illustration, and not for limitation. For example, the order of the steps may be changed. Some of the steps may be omitted or any other suitable additional steps may be added. It is assumed that the terminal device 110 may be in an LPWUS mode initially. It is also assumed that a dynamic PO corresponds to a first set of POs, a legacy PO corresponds to a second set of POs, and the first set of POs is earlier than available POs in the second set of POs.
[0162] As shown in FIG. 4, the terminal device 110 may receive 410, from the network device 120, an LPWUS for the terminal device 110. For example, the terminal device 110 may perform LPWUS monitoring on configured LPWUS occasions and receive the LPWUS on an LPWUS occasion.
[0163] With reference to FIG. 4, upon reception of the LPWUS, the terminal device 110 may perform 420 a paging monitoring (for convenience, also referred to as a first paging monitoring herein) on the first set of POs (i.e., dynamic PO) . In some embodiments, the terminal device 110 may receive information for the terminal device 110 on the first set of POs. In some embodiments, the terminal device 110 may not receive any information for the terminal device 110 on the first set of POs. In some embodiments, the first paging monitoring on the first set of POs may be failed.
[0164] With reference to FIG. 4, if no information for the terminal device 110 is received on the first set of POs or the first paging monitoring on the first set of POs is failed, the terminal device 110 may perform 430 a paging monitoring (for convenience, also referred to as a second paging monitoring herein) on the available POs in the second set of POs (i.e., legacy PO) .
[0165] For illustration, an example will be described in connection with FIG. 5. FIG. 5 illustrates a schematic diagram 500 illustrating another example paging monitoring according to embodiments of the present disclosure. As shown in FIG. 5, upon reception of an LPWUS on an LPWUS occasion 510, paging monitoring is performed on a dynamic PO 511. If no related information is received on the dynamic PO 511 or the paging monitoring fails, paging monitoring is performed on a legacy PO 512.
[0166] For illustration, an example procedure may be described as below.
[0167] Upon reception of LPWUS, UE shall:
[0168] 1> if the LPWUS signal corresponding to the UE is detected and if dynamic PO monitoring is configured:
[0169] 2> monitor the dynamic PO based on dynamic PO configuration, e.g., use any PO configured to other UEs immediately after LPWUS, or use additional / dedicated PO for LPWUS;
[0170] 2> if the information corresponding to the UE within dynamic PO does not exist, or,
[0171] 2> if the UE fail to monitor dynamic PO:
[0172] 3> monitor the (first) PO of the UE based on paging calculation formula.
[0173] Continuing to refer to FIG. 4, in some embodiments, the terminal device 110 may receive 431 an indication for enabling or disabling the second paging monitoring (i.e., legacy PO monitoring) . If the indication indicates enabling the second paging monitoring, the terminal device 110 may perform 432 the second paging monitoring when no information for the terminal device 110 is received on the first set of POs or the first paging monitoring on the first set of POs is failed. If the indication indicates disabling the second paging monitoring, no legacy PO monitoring is needed once the dynamic PO monitoring is finished.
[0174] In this way, a paging for a terminal device may be reliably received, and consistency between a terminal device and a network device may be enhanced.
[0175] EXAMPLE IMPLEMENTATION OF PAGING CONFIGURATION DEDICATED FOR LPWUS
[0176] This embodiment provides a solution of using a paging configuration dedicated for LPWUS. Detailed description will be given in connection with FIG. 6.
[0177] FIG. 6 illustrates a schematic diagram illustrating another process 600 of communication according to embodiments of the present disclosure. For the purpose of discussion, the process 600 will be described with reference to FIGs. 1A and 1B. The process 600 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1A. It is to be understood that the steps and the order of the steps in FIG. 6 are merely for illustration, and not for limitation. For example, the order of the steps may be changed. Some of the steps may be omitted or any other suitable additional steps may be added. It is assumed that the terminal device 110 may be in an LPWUS mode initially. It is also assumed that a dynamic PO corresponds to a first set of POs, a legacy PO corresponds to a second set of POs, and the first set of POs is earlier than available POs in the second set of POs.
[0178] As shown in FIG. 6, the terminal device 110 may receive 610, from the network device 120, a first configuration of paging monitoring for a first mode (i.e., the LPWUS mode) . In the first mode, the main radio 142 of the terminal device 110 is turn off and the LPWUS receiver 141 of the terminal device 110 is turn on. The first configuration is applied for a paging monitoring upon LPWUS reception. The first configuration is a newly defined paging configuration.
[0179] As shown in FIG. 6, the terminal device 110 may receive 620, from the network device 120, a second configuration of paging monitoring for a second mode (e.g., any RRC state) . In the second mode, the main radio 142 of the terminal device 110 is turn on and the LPWUS receiver 141 of the terminal device 110 is turn off. The second configuration is applied for a paging monitoring except for the paging monitoring upon LPWUS reception. The second configuration is a legacy paging configuration.
[0180] The first configuration is different from the second configuration. In some embodiments, a paging based on the first configuration is denser than a paging based on the second configuration.
[0181] In some embodiments, a paging cycle based on the first configuration may be shorter than a paging cycle based on the second configuration. In other words, a value of a periodicity of paging monitoring based on the newly defined paging configuration may be smaller than a value of a periodicity of paging monitoring based on the legacy paging configuration.
[0182] In some embodiments, number of PFs within a paging cycle based on the first configuration may be greater than number of PFs within a paging cycle based on the second configuration. In other words, PFs based on the newly defined paging configuration may be denser than PFs based on the legacy paging configuration.
[0183] In some embodiments, number of POs in a PF based on the first configuration may be greater than number of POs in a PF based on the second configuration. In other words, POs based on the newly defined paging configuration may be denser than POs based on the legacy paging configuration.
[0184] Continuing to refer to FIG. 6, the terminal device 110 may receive 630, from the network device 120, an LPWUS for the terminal device 110 in the first mode. For example, the terminal device 110 may perform LPWUS monitoring on configured LPWUS occasions and receive the LPWUS on an LPWUS occasion.
[0185] With reference to FIG. 6, upon reception of the LPWUS, the terminal device 110 may determine 640 a first set of POs based on the first configuration of paging monitoring. For example, the first configuration may indicate at least one of the following: a paging cycle, number of PFs in a paging cycle and number of POs in a PF, or an offset for PF determination. The terminal device 110 may determine the first set of POs based on the equations (1) and (2) described above.
[0186] With reference to FIG. 6, the terminal device 110 may perform 650 the paging monitoring on the first set of POs.
[0187] For illustration, an example will be described in connection with FIG. 7. FIG. 7 illustrates a schematic diagram 700 illustrating another example paging monitoring according to embodiments of the present disclosure. As shown in FIG. 7, a reference sign 710 shows a legacy paging configuration. In the legacy paging configuration, a paging cycle is 8 radio frames, number of PFs in a paging cycle is 4 (i.e., half of system frames are PFs, denoted as halfT herein) , and number of POs in a PF is 1. A reference sign 720 shows a paging configuration dedicated for LPWUS. In the paging configuration dedicated for LPWUS, a paging cycle is 4 radio frames, number of PFs in a paging cycle is 8 (i.e., each system frame is a PF, denoted as oneT herein) , and number of POs in a PF is 2.
[0188] With reference to FIG. 7, upon reception of an LPWUS on an LPWUS occasion 721, a paging monitoring may be performed based on the paging configuration shown by the reference sign 720. For example, an available PO of the terminal device 110 closest to LPWUS reception is a PO 722. If a dynamic PO monitoring is configured, the paging monitoring may be performed on any of POs 723 of other terminal devices.
[0189] For illustration, an example procedure may be described as below.
[0190] Upon reception LPWUS and paging configuration, UE shall:
[0191] 1> if the UE is configured to monitor LPWUS and a paging configuration dedicated for LPWUS (e.g., PCCH-Config) is provided via e.g., system information or dedicated RRC signaling:
[0192] 2> use the paging configuration dedicated for LPWUS to monitor paging including a dynamic PO or PO of the UE after LP-WUS reception.
[0193] In this way, a paging configuration dedicated for LPWUS may be defined and a false alarm issue may be reduced by usage of the paging configuration.
[0194] It is to be understood that the above example processes are merely for illustration and are not intended for limitation. It is also to be understood that operations in the processes 200, 400 and 600 may be carried out separately or in any suitable combination.
[0195] EXAMPLE IMPLEMENTATION OF METHODS
[0196] Corresponding to the above processes, embodiments of the present disclosure provide methods of communication implemented at a terminal device. These methods will be described below with reference to FIGs. 8 to 10.
[0197] FIG. 8 illustrates a flowchart of an example method 800 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure. For example, the method 800 may be performed at the terminal device 110 as shown in FIG. 1A. For the purpose of discussion, in the following, the method 800 will be described with reference to FIG. 1A. It is to be understood that the method 800 may include additional blocks not shown and / or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
[0198] At block 810, the terminal device 110 receives, from the network device 120, an LPWUS for the terminal device 110.
[0199] At block 820, the terminal device 110 determines that a condition of using a first set of POs for a paging monitoring is fulfilled, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device 110.
[0200] In some embodiments, the condition may be associated with at least one of the following: a first time offset between a timing of reception of the LPWUS and a timing of a start of an available PO in the second set of POs; number of available POs of the first set of POs within the first time offset; a second time offset between the timing of the reception of the LPWUS and a timing of a start of an available PO in the first set of POs; a warm-up duration of a main radio of the terminal device 110; a paging cycle used for the terminal device 110; a notification of common information for terminal devices, or an indication from the network device 120, the indication indicating using the first set of POs for the paging monitoring.
[0201] In some embodiments, the condition may comprise at least one of the following: the first time offset is greater than or equal to an offset threshold; the number of available POs of the first set of POs within the first time offset is greater than or equal to a number threshold; the second time offset is greater than or equal to the warm-up duration of the main radio of the terminal device 110; the paging cycle used for the terminal device 110 is greater than or equal to a cycle threshold; the notification of common information for terminal devices is carried in the LPWUS; the indication indicating using the first set of POs for the paging monitoring is carried in the LPWUS; the indication indicating using the first set of POs for the paging monitoring is carried in system information; or the indication indicating using the first set of POs for the paging monitoring is carried in an RRC signaling.
[0202] In some embodiments, the timing of the reception of the LPWUS may comprise one of the following: a start of an LPWUS occasion in which the LPWUS is received; an end of the LPWUS occasion; or an end of a warm-up duration of a main radio of the terminal device 110.
[0203] At block 830, the terminal device 110 performs the paging monitoring on the first set of POs.
[0204] In some embodiments, the terminal device 110 may transmit, to the network device 120, information of capability of the terminal device 120 comprising a warm-up duration of a main radio of the terminal device 120.
[0205] In some embodiments, if the condition is unfulfilled, the terminal device 110 may perform the paging monitoring on an available PO in the second set of POs.
[0206] In some embodiments, the first set of POs may be configured for the terminal device 110. In some embodiments, the first set of POs may be selected from POs configured for a set of terminal devices different from the terminal device 110.
[0207] With the method 800, a dynamic PO monitoring may be performed in a flexible and reasonable way.
[0208] FIG. 9 illustrates a flowchart of another example method 900 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure. For example, the method 900 may be performed at the terminal device 110 as shown in FIG. 1A. For the purpose of discussion, in the following, the method 900 will be described with reference to FIG. 1A. It is to be understood that the method 900 may include additional blocks not shown and / or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
[0209] At block 910, the terminal device 110 receives, from the network device 120, an LPWUS for the terminal device 110.
[0210] At block 920, the terminal device 110 performs a first paging monitoring on a first set of POs. The first set of POs is earlier than available POs in a second set of POs configured for the terminal device 110.
[0211] At block 930, the terminal device 110 determines that no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed.
[0212] At block 940, the terminal device 110 performs a second paging monitoring on the available POs in the second set of POs.
[0213] In some embodiments, the terminal device 110 may receive, from the network device 120, an indication for enabling or disabling the second paging monitoring.
[0214] With the method 900, a paging for a terminal device may be reliably received, and consistency between a terminal device and a network device may be enhanced.
[0215] FIG. 10 illustrates a flowchart of another example method 1000 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure. For example, the method 1000 may be performed at the terminal device 110 as shown in FIG. 1A. For the purpose of discussion, in the following, the method 1000 will be described with reference to FIG. 1A. It is to be understood that the method 1000 may include additional blocks not shown and / or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
[0216] At block 1010, the terminal device 110 receives, from the network device 120, an LPWUS for the terminal device 110 in a first mode. In the first mode, a main radio of the terminal device 110 is turn off and an LPWUS receiver of the terminal device 110 is turn on.
[0217] At block 1020, the terminal device 110 determines a first set of POs based on a first configuration of a paging monitoring for the first mode. The first configuration is different from a second configuration of a paging monitoring for a second mode. In the second mode, the main radio of the terminal device 110 is turn on and an LPWUS receiver of the terminal device 110 is turn off.
[0218] In some embodiments, the first configuration and the second configuration fulfill at least one of the following: a paging cycle based on the first configuration is shorter than a paging cycle based on the second configuration; number of paging frames within the paging cycle based on the first configuration is greater than number of paging frames within the paging cycle based on the second configuration; or number of POs in a paging frame based on the first configuration is greater than number of POs in a paging frame based on the second configuration.
[0219] At block 1030, the terminal device 110 performs the paging monitoring on the first set of POs.
[0220] With the method 1000, a paging configuration dedicated for an LPWUS may be defined and a false alarm issue may be reduced by usage of the paging configuration.
[0221] It is to be understood that operations of the methods 800 to 1000 correspond to the process described in connection with FIGs. 2 to 7, and thus other details are not repeated here for conciseness.
[0222] EXAMPLE IMPLEMENTATION OF DEVICES
[0223] FIG. 11 is a simplified block diagram of a device 1100 that is suitable for implementing embodiments of the present disclosure. The device 1100 can be considered as a further example implementation of the terminal device 110 or the network device 120 as shown in FIG. 1A. Accordingly, the device 1100 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0224] As shown, the device 1100 includes a processor 1110, a memory 1120 coupled to the processor 1110, a suitable transceiver 1140 coupled to the processor 1110, and a communication interface coupled to the transceiver 1140. The memory 1110 stores at least a part of a program 1130. The transceiver 1140 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1140 may include at least one of a transmitter 1142 or a receiver 1144. The transmitter 1142 and the receiver 1144 may be functional modules or physical entities. The transceiver 1140 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0225] The program 1130 is assumed to include program instructions that, when executed by the associated processor 1110, enable the device 1100 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGs. 1A to 10. The embodiments herein may be implemented by computer software executable by the processor 1110 of the device 1100, or by hardware, or by a combination of software and hardware. The processor 1110 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1110 and memory 1120 may form processing means 1150 adapted to implement various embodiments of the present disclosure.
[0226] The memory 1120 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1120 is shown in the device 1100, there may be several physically distinct memory modules in the device 1100. The processor 1110 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1100 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.
[0227] In some embodiments, a terminal device comprises a circuitry configured to: receive, from a network device, an LPWUS for the terminal device; determine that a condition of using a first set of paging occasions (POs) for a paging monitoring is fulfilled, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and perform the paging monitoring on the first set of POs.
[0228] In some embodiments, a terminal device comprises a circuitry configured to: receive, from a network device, an LPWUS for the terminal device; perform a first paging monitoring on a first set of POs, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; and in accordance with a determination that no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed, perform a second paging monitoring on the available POs in the second set of POs.
[0229] In some embodiments, a terminal device comprises a circuitry configured to: receive, from a network device, an LPWUS for the terminal device in a first mode in which a main radio of the terminal device is turn off and an LPWUS receiver of the terminal device is turn on; determine a first set of POs based on a first configuration of a paging monitoring for the first mode, the first configuration being different from a second configuration of a paging monitoring for a second mode in which the main radio of the terminal device is turn on and an LPWUS receiver of the terminal device is turn off; and perform the paging monitoring on the first set of POs.
[0230] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0231] 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, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods 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.
[0232] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGs. 1A to 10. 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.
[0233] Program code for carrying out methods of the present 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, special purpose computer, or other programmable data processing apparatus, such that the program codes, 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.
[0234] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine 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 machine 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.
[0235] Further, while 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, while 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. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0236] Although the present disclosure has been described in language 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 terminal device, comprising:a processor configured to cause the terminal device to:receive, from a network device, a low-power wake-up signal (LPWUS) for the terminal device;determine that a condition of using a first set of paging occasions (POs) for a paging monitoring is fulfilled, the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; andperform the paging monitoring on the first set of POs.2.The terminal device of claim 1, wherein the condition is associated with at least one of the following:a first time offset between a timing of reception of the LPWUS and a timing of a start of an available PO in the second set of POs,number of available POs of the first set of POs within the first time offset,a second time offset between the timing of the reception of the LPWUS and a timing of a start of an available PO in the first set of POs,a warm-up duration of a main radio of the terminal device,a paging cycle used for the terminal device,a notification of common information for terminal devices, oran indication from the network device, the indication indicating using the first set of POs for the paging monitoring.3.The terminal device of claim 2, wherein the condition comprises at least one of the following:the first time offset is greater than or equal to an offset threshold;the number of available POs of the first set of POs within the first time offset is greater than or equal to a number threshold;the second time offset is greater than or equal to the warm-up duration of the main radio of the terminal device;the paging cycle used for the terminal device is greater than or equal to a cycle threshold;the notification of common information for terminal devices is carried in the LPWUS;the indication indicating using the first set of POs for the paging monitoring is carried in the LPWUS;the indication indicating using the first set of POs for the paging monitoring is carried in system information; orthe indication indicating using the first set of POs for the paging monitoring is carried in a radio resource control (RRC) signaling.4.The terminal device of claim 2, wherein the timing of the reception of the LPWUS comprises one of the following:a start of an LPWUS occasion in which the LPWUS is received,an end of the LPWUS occasion, oran end of a warm-up duration of a main radio of the terminal device.5.The terminal device of claim 1, wherein the terminal device is further caused to:transmit, to the network device, information of capability of the terminal device comprising a warm-up duration of a main radio of the terminal device.6.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that the condition is unfulfilled, perform the paging monitoring on an available PO in the second set of POs.7.The terminal device of claim 1, wherein the first set of POs is configured for the terminal device, orwherein the first set of POs is selected from POs configured for a set of terminal devices different from the terminal device.8.A terminal device, comprising:a processor configured to cause the terminal device to:receive, from a network device, a low-power wake-up signal (LPWUS) for the terminal device;perform a first paging monitoring on a first set of paging occasions (POs) , the first set of POs being earlier than available POs in a second set of POs configured for the terminal device; andin accordance with a determination that no information for the terminal device is received on the first set of POs or the first paging monitoring on the first set of POs is failed, perform a second paging monitoring on the available POs in the second set of POs.9.The terminal device of claim 8, wherein the terminal device is further caused to:receive, from a network device, an indication for enabling or disabling the second paging monitoring.10.A terminal device, comprising:a processor configured to cause the terminal device to:receive, from a network device, a low-power wake-up signal (LPWUS) for the terminal device in a first mode in which a main radio of the terminal device is turn off and an LPWUS receiver of the terminal device is turn on;determine a first set of paging occasions (POs) based on a first configuration of a paging monitoring for the first mode, the first configuration being different from a second configuration of a paging monitoring for a second mode in which the main radio of the terminal device is turn on and an LPWUS receiver of the terminal device is turn off; andperform the paging monitoring on the first set of POs.11.The terminal device of claim 10, wherein the first configuration and the second configuration fulfill at least one of the following:a paging cycle based on the first configuration is shorter than a paging cycle based on the second configuration;number of paging frames within the paging cycle based on the first configuration is greater than number of paging frames within the paging cycle based on the second configuration; ornumber of POs in a paging frame based on the first configuration is greater than number of POs in a paging frame based on the second configuration.
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