WO2022206412A1 - 一种寻呼方法及装置 - Google Patents

一种寻呼方法及装置 Download PDF

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Publication number
WO2022206412A1
WO2022206412A1 PCT/CN2022/081500 CN2022081500W WO2022206412A1 WO 2022206412 A1 WO2022206412 A1 WO 2022206412A1 CN 2022081500 W CN2022081500 W CN 2022081500W WO 2022206412 A1 WO2022206412 A1 WO 2022206412A1
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WO
WIPO (PCT)
Prior art keywords
paging
ran
cell
communication device
configuration
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PCT/CN2022/081500
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English (en)
French (fr)
Inventor
谢曦
常俊仁
刘俊
毛颖超
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华为技术有限公司
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Publication of WO2022206412A1 publication Critical patent/WO2022206412A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a paging method and device.
  • a radio resource control (radio resource control, RRC) inactive state When a user equipment (user equipment, UE) in a radio resource control (radio resource control, RRC) inactive state is camped on a suitable cell (suitable cell), it is in a camped normally (camped normally) state.
  • RRC radio resource control
  • the UE will camp on an acceptable cell and enter the camped on any cell state. , and migrate from the RRC inactive state to the RRC idle state. After the UE transitions from the RRC inactive state to the RRC idle state, it will not autonomously transition back to the RRC inactive state. For example, the UE may continue to perform cell reselection on an acceptable cell, and if an appropriate cell is selected, the UE may return to the appropriate cell and re-enter the normal camping state in the appropriate cell. However, the UE will still remain in the RRC idle state on a suitable cell, and will not actively return to the RRC inactive state.
  • the transition of the RRC state of the UE is an autonomous behavior of the UE, and the network does not perceive it. This results in inconsistent understanding of the state of the UE by the UE and the network, which may cause the network to fail to page the UE.
  • the embodiments of the present application provide a paging method and apparatus, which are used to improve the success rate of the network paging to the UE.
  • the terminal device if the terminal device returns from the camping state of any cell to the normal camping state (or, in other words, the terminal device returns from an acceptable cell to a suitable cell), it can monitor RAN paging, that is, , even if the terminal device is still in the RRC idle state, it can monitor the RAN paging.
  • the network device will think that the terminal device is in the RRC inactive state, so the network device will page the terminal device in the way of RAN paging, and the terminal device can monitor the paging of the network device by monitoring the RAN paging, improving the performance of the network device.
  • the success rate of the network device paging to the terminal device is determined.
  • the network equipment may be able to page the terminal equipment through a relatively small number of times, there is no need to page multiple times, and the terminal equipment with the same paging timing as the terminal equipment does not need to receive redundant paging multiple times. This also reduces the interference to other terminal devices, which is beneficial to the energy saving of other terminal devices.
  • monitoring the RAN paging includes: in the case that the second cell belongs to the first RAN-based notification area RNA, monitoring the RAN paging, the first RNA is the The RNA to which the terminal equipment belongs before entering the camping state of any cell. If the network wants to page the terminal device through RAN paging, it may paging in the RNA to which the terminal device belongs.
  • the RNA to which the terminal device belongs refers to the RNA to which the terminal device belongs before entering the camping state of any cell. , such as the first RNA. Therefore, if the second cell belongs to the first RNA, the terminal device can listen to the RAN paging.
  • the method further includes: camping on the first cell and entering an RRC idle state when the RRC is in an inactive state, and the first cell is acceptable cell; retain the first configuration, and/or retain at least one item, the at least one item includes one or more of the second configuration, security key, radio bearer, or radio resource, and the first configuration uses
  • the terminal device monitors the RAN paging, and the at least one item is used for the terminal device to return to the RRC inactive state. When the terminal device enters the RRC idle state from the RRC inactive state, it will originally release the first configuration (or release at least one item).
  • the terminal device may not release the first configuration (or release at least one item) when entering the RRC idle state. In this way, if the terminal device enters a suitable cell from the first cell again and returns to the normal camping state, then the terminal device can monitor the RAN search due to retaining the first configuration (or, retaining at least one item). call.
  • the network may also think that the terminal device is in the RRC inactive state, so the network may page the terminal device in the way of RAN paging, so that the monitoring method of the terminal device for paging is the same as the network's paging of the terminal device. The method is consistent, which improves the success rate of the network finding the terminal device through paging.
  • the method further includes: maintaining a timer to continue running, and the timer is used for the terminal device to update the RNA.
  • the timer is, for example, a T380 timer, or other timers.
  • retaining the first configuration includes: if the remaining duration of the timer is greater than or equal to a first threshold, retaining the first configuration. If the remaining duration of the timer is greater than or equal to the first threshold, it indicates that the remaining duration of the timer is relatively long, and the terminal device may be able to re-enter the normal camping state during this period, so as to use the first configuration to monitor RAN paging , so in this case, the terminal device can keep the first configuration. If the remaining duration of the timer is less than the first threshold, it indicates that the remaining duration of the timer is not much, which may not be enough to make the terminal device enter the normal park state.
  • the terminal device should initiate the RNAU process, but The terminal device cannot initiate the RNAU process because it is in the RRC idle state. If the network device does not receive the RNAU process initiated by the terminal device, it can know that the state of the terminal device is abnormal, so that the network device can notify the CN to initiate CN paging. That said, the network may no longer page the terminal device through RAN paging. Therefore, if the remaining duration of the timer is less than the first threshold, the terminal device does not need to monitor the RAN paging any more, so in this case, the terminal device does not need to retain the first configuration.
  • the method further includes: if the timer times out, releasing the first configuration. If the timer expires, the terminal device should initiate the RNAU process, but the terminal device cannot initiate the RNAU process because it is in the RRC idle state, and the network device does not receive the RNAU process initiated by the terminal device, and can know that the state of the terminal device is abnormal. , so that the network device can notify the CN to initiate CN paging, that is, the network may no longer page the terminal device through the RAN paging method. Therefore, if the timer expires, the terminal device does not need to monitor RAN paging any more, so the first configuration can be released.
  • the first configuration includes one or more of the following: I-RNTI, RAN paging cycle, information of the first RNA, or the configuration of the timer.
  • the first configuration may include other information in addition to one or more of the above.
  • the terminal device can monitor the RAN paging according to the first configuration.
  • the method further includes: determining a minimum value among the RAN paging cycle, the default paging cycle, and the specific paging cycle of the terminal device as a cycle for monitoring paging.
  • the terminal equipment may determine the paging period according to the manner in which the terminal equipment in the RRC inactive state determines the paging period. For example, the terminal device may determine the minimum value among the RAN paging cycle, the default paging cycle, and the specific paging cycle of the terminal device as the cycle for monitoring paging.
  • the method further includes: receiving the RAN page; if the RAN page includes the I-RNTI of the terminal device, initiating an RRC connection establishment procedure.
  • Monitoring paging and receiving paging can be considered as two processes, or, monitoring paging may also include receiving paging, then this optional implementation can be changed to: monitoring RAN paging, including: receiving the RAN paging call; if the RAN page includes the I-RNTI of the terminal device, initiate an RRC connection establishment procedure.
  • Receiving a RAN paging includes receiving a RAN paging message, or includes receiving a paging DCI and a RAN paging message, or includes receiving a wake-up signal, paging a DCI and a RAN paging message, and the like. If the I-RNTI of the UE is included in the RAN paging message, indicating that the UE is being paged, the UE may determine the corresponding operation according to other contents included in the RAN paging message, for example, the UE initiates the operation in the second cell RRC connection establishment process to enter the RRC connection state.
  • the method further includes: receiving indication information, where the indication information is used to indicate that this paging includes the RAN paging; and receiving the RAN paging.
  • Monitoring paging and receiving paging can be considered as two processes, or, monitoring paging can also include receiving paging, then this optional implementation can be changed to: monitoring RAN paging, including: receiving indication information, all The indication information is used to indicate that this paging includes the RAN paging; and the RAN paging is received.
  • the network can perform paging according to the mechanism of distinguishing CN paging and RAN paging.
  • the mechanism of distinguishing CN paging and RAN paging is a way to reduce the probability of false alarms generated by UEs in RRC idle state. If the indication information indicates that this paging includes RAN paging, for the terminal equipment in the RRC idle state, after receiving the indication information, it is not necessary to continue monitoring the paging (ie, RAN paging). However, in the embodiment of the present application, since the terminal device retains the first configuration, it can identify the RAN paging, so the terminal device can still continue to monitor the RAN paging.
  • the method further includes: if the RAN page includes the I-RNTI of the terminal device, initiating an RRC connection establishment procedure.
  • the indication information is included in the wake-up signal, or included in the paging DCI. Alternatively, the indication information may also be included in other messages.
  • the method further includes: receiving first information, where the first information is used to indicate paging a first group, the first group including one or more RRC inactive state terminal equipment, and the terminal equipment belongs to the first group when in the RRC inactive state; receives the RAN paging.
  • Monitoring paging and receiving paging can be considered as two processes, or, monitoring paging may also include receiving paging, then this optional implementation can be changed to: monitoring RAN paging, including: receiving the first information, The first information is used to indicate paging a first group, the first group includes one or more terminal devices in an RRC inactive state, and the terminal devices belong to the first RRC inactive state group; receive the RAN page.
  • the network divides multiple UEs covered by the network into different groups, and paging the different groups respectively during paging.
  • the terminal device When the terminal device is in the RRC inactive state, the terminal device belongs to the first group, but the terminal device is currently in the RRC idle state, so actually the terminal device does not belong to the first group.
  • the network device since the terminal device retains the first configuration, and the network device may think that the terminal device is still in the RRC inactive state, the network device may page the terminal device in the paging message for paging the first group, Therefore, the terminal device can continue to monitor the paging for paging the first group according to the first information, so as to improve the efficiency of the network searching for the terminal device.
  • the method further includes: if the RAN page includes the I-RNTI of the terminal device, initiating an RRC connection establishment procedure.
  • the method further includes: receiving second information, where the second information is used to indicate paging a second group, where the second group includes one or more RRC idle state terminal equipment, and the terminal equipment belongs to the second group; receiving CN paging.
  • Monitoring paging and receiving paging can be considered as two processes, or, monitoring paging may also include receiving paging, then this optional implementation can be changed to: monitoring RAN paging, including: receiving second information, The second information is used to instruct to page a second group, the second group includes one or more terminal equipments in the RRC idle state, and the terminal equipment belongs to the second group; CN paging is received.
  • the terminal device can monitor the RAN paging and not the CN paging, so as to save the power consumption of the terminal device; or, the terminal device can also monitor the RAN paging and CN paging, so as to improve the ability of the network to find the terminal. equipment efficiency.
  • the method further includes: if the second cell does not belong to the first RNA, releasing a first configuration, the first configuration is used for the terminal device to monitor the RAN paging.
  • the first configuration retained by the terminal device includes the information of the first RNA.
  • the network will also page the terminal device within the range of the first RNA. If the second cell does not belong to the first RNA, the network may not page the terminal device in the second cell and the terminal device cannot receive a RAN page for paging the terminal device in the second cell. Therefore, in this case, the terminal device does not need to retain the first configuration, but can release the first configuration.
  • the terminal device is in an RRC idle state.
  • the terminal equipment may be in the RRC idle state in the second cell, and although the terminal equipment is in the RRC idle state, the terminal equipment can still monitor the RAN paging.
  • retaining at least one item includes: if the remaining duration of the timer is greater than or equal to a second threshold, retaining the at least one item. If the remaining duration of the timer is greater than or equal to the second threshold, it indicates that the remaining duration of the timer is relatively large, and the terminal device may be able to re-enter the normal camping state during this period, so as to use the at least one item to recover to the RRC non-reactive state. Active state, so as to monitor RAN paging, so in this case, the terminal equipment can keep at least one item.
  • the terminal device should initiate the RNAU process, but The terminal device cannot initiate the RNAU process because it is in the RRC idle state. If the network device does not receive the RNAU process initiated by the terminal device, it can know that the state of the terminal device is abnormal, so that the network device can notify the CN to initiate CN paging. That said, the network may no longer page the terminal device through RAN paging. Therefore, if the remaining duration of the timer is less than the second threshold, it is unnecessary for the terminal device to return to the RRC inactive state, so in this case, the terminal device does not need to keep at least one item.
  • the method further includes: if the timer times out and the terminal device does not enter the normal camping state, releasing all the at least one of the above. If the timer expires, the terminal device should initiate the RNAU process, but the terminal device cannot initiate the RNAU process because it is in the RRC idle state, and the network device does not receive the RNAU process initiated by the terminal device, and can know that the state of the terminal device is abnormal. , so that the network device can notify the CN to initiate CN paging, that is, the network may no longer page the terminal device through the RAN paging method. Therefore, if the timer expires, there is no need for the terminal device to monitor RAN paging by resuming the RRC inactive state. So in this case, the terminal device may not need to keep at least one item.
  • the second configuration includes one or more of the following: an RRC inactive access stratum context of the terminal device, a suspension configuration, a transmission resource configuration, or a radio bearer configuration .
  • the second configuration may include other information in addition to one or more of the above.
  • the method further includes: after the second cell is selected, recovering from the RRC idle state to the RRC inactive state. After the terminal device selects the second cell, it can return to the RRC inactive state according to at least one item, so that the RAN paging can be normally monitored in the RRC inactive state, and the efficiency of the network to find the terminal device is improved.
  • monitoring the RAN paging includes: monitoring the RAN paging in the RRC inactive state. After the terminal device returns to the RRC inactive state, it can monitor the RAN paging normally in the RRC inactive state. Of course, the terminal device may also monitor CN paging in the RRC inactive state, which is not limited in this embodiment of the present application.
  • the method further includes: if the second cell does not belong to the first RNA, initiating a RAN-based notification area update procedure. If the second cell does not belong to the first RNA, the terminal device can first restore to the RRC inactive state, and in the RRC inactive state, the terminal device can try to initiate an RNAU procedure to update the RNA of the terminal device.
  • the method further includes: if the RAN-based notification area update procedure fails, releasing the at least one item. If the RNAU process fails, the network may know that the state of the terminal device is different, and may instead page the terminal device through CN paging. Therefore, in this case, the terminal device does not need to return to the RRC inactive state, and the terminal device can release at least one item.
  • monitoring the RAN paging includes: if the RAN-based notification area update process is successful, monitoring the RAN paging in the RRC inactive state. If the RNAU process is successful, the network will page the terminal device in the updated RNA. For example, the network device may page the terminal device through the RAN paging method, and the terminal device normally monitors the RAN paging in the RRC inactive state. Can.
  • the method further includes: if the second cell does not belong to the first RNA, releasing the at least one item. If the second cell does not belong to the first RNA, the terminal device can initiate the RNAU process, or the terminal device does not need to initiate the RNAU process, but directly releases at least one item and does not return to the RRC inactive state, so as to reduce the operation of the terminal device , simplifying the implementation of terminal equipment.
  • another paging method is provided that can be performed by a network device, or by a larger device including the network device, or by circuitry capable of implementing the functions of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: generating a first threshold, the first threshold being used to determine whether a terminal device retains a first configuration, the first configuration being used by the terminal device to monitor RAN paging; and sending the first threshold.
  • the network device may send the first threshold through unicast or broadcast.
  • the first configuration includes one or more of the following: the I-RNTI of the terminal device, the RAN paging cycle, the information of the first RNA, or the configuration of a timer.
  • the first RNA is the RNA where the terminal device is located, and the timer is used for the terminal device to update the RNA.
  • yet another paging method is provided that can be performed by a network device, or by a larger device including the network device, or by circuitry capable of implementing the functions of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: generating a second threshold, the second threshold being used to determine whether the terminal device retains at least one item, the at least one item including one of a second configuration, a security key, a radio bearer, or a radio resource or Multiple items, the at least one item is used for the terminal equipment to return to the RRC inactive state; the second threshold is sent.
  • the network device may send the second threshold by means of unicast or broadcast.
  • the second configuration includes one or more of the following: an RRC inactive access stratum context of the terminal device, a suspension configuration, a transmission resource configuration, or a radio bearer configuration .
  • a communication device is provided.
  • the communication apparatus may be the terminal device described in any one of the first aspect to the third aspect.
  • the communication device has the function of the above-mentioned terminal device.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the transceiver unit can realize the sending function and the receiving function.
  • the sending unit sometimes also called the sending module
  • the receiving unit sometimes also called receiving module
  • the sending unit and the receiving unit can be the same functional module, which is called a transceiver unit, and this functional module can realize the sending function and the receiving function; or, the sending unit and the receiving unit can be different functional modules, and the transceiver unit is the The collective name for functional modules.
  • the processing unit is configured to reselect or select from a first cell to a second cell, wherein the terminal device is in the camping state of any cell in the first cell, and the terminal device is in the second cell
  • the cell is in a normal camping state
  • the transceiver unit (or, the receiving unit) is configured to monitor RAN paging.
  • the communication apparatus includes: a processor, coupled to the memory, for executing instructions in the memory, so as to implement the method executed by the terminal device in any one of the first to third aspects above.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a communication device is provided.
  • the communication apparatus may be the network device described in any one of the first aspect to the third aspect.
  • the communication device has the function of the above-mentioned network device.
  • the network equipment is, for example, a base station, or a baseband device in a base station.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • a processing unit sometimes also called a processing module
  • transceiver unit sometimes also called a transceiver module
  • the processing unit configured to generate a first threshold, where the first threshold is used to determine whether the terminal device retains a first configuration, where the first configuration is used for the terminal device to monitor RAN paging;
  • the transceiver unit (or, the sending unit) is configured to send the first threshold.
  • the processing unit is configured to generate a second threshold, and the second threshold is used to determine whether the terminal device retains at least one item, the at least one item including the second configuration, the security key, the radio bearer, or the radio resource.
  • the at least one item is used for the terminal equipment to return to the RRC inactive state;
  • the transceiver unit (or, the sending unit) is configured to send the second threshold.
  • the communication apparatus includes: a processor, coupled to the memory, for executing instructions in the memory, so as to implement the method performed by the network device in any one of the first to third aspects above.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program or instruction, and when it is executed, the method performed by the terminal device or the network device in the above aspects is realized. .
  • a computer program product comprising instructions which, when run on a computer, cause the methods of the above aspects to be implemented.
  • the terminal device if the terminal device returns from the camping state of any cell to the normal camping state, it can monitor the RAN paging, which improves the success rate of the network device paging to the terminal device.
  • FIG. 1A is a schematic diagram of a communication system according to an embodiment of the application.
  • FIG. 1B is a schematic diagram of the RRC state change of the UE
  • FIG. 2A is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2B is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 2C is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 3 is a flowchart of a paging method provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • the technologies provided in the embodiments of the present application can be applied to the communication system 10 shown in FIG. 1A .
  • the communication system 10 includes one or more communication apparatuses 30 (for example, terminal equipment), and the one or more communication apparatuses 30 pass through one or more communication apparatuses 30 .
  • Each access network device 20 is connected to one or more core network devices to implement communication between multiple communication devices.
  • the communication system may, for example, support 2G, 3G, 4G, or 5G (sometimes also referred to as new radio, NR) access technology communication systems, wireless fidelity (Wi-Fi) systems, third-generation partners
  • 3GPP 3rd generation partnership project
  • a communication system that supports the fusion of multiple wireless technologies or a future-oriented evolution system.
  • a terminal device is a device with a wireless transceiver function, which may be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a built-in wireless device in the above-mentioned device). , communication modules, modems, or circuitry, etc.).
  • the terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: cellular communication, device-to-device communication (device-to-device, D2D), vehicle-to-everything (vehicle to everything, V2X), machine-to-machine/machine-type communications (M2M/MTC), Internet of things (internet of things, IoT), virtual reality (virtual reality, VR) , Augmented reality (AR), industrial control (industrial control), unmanned driving (self driving), telemedicine (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation , terminal equipment for smart city, drone, robot and other scenarios.
  • cellular communication device-to-device communication
  • vehicle-to-everything vehicle to everything, V2X
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • virtual reality virtual reality
  • AR Augmented reality
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the network devices in the embodiments of the present application include, for example, access network devices and/or core network devices.
  • the access network device is a device with a wireless transceiver function, and is used to communicate with the terminal device.
  • the access network equipment includes, but is not limited to, a base transceiver station (BTS), a Node B (Node B), an evolved Node B (eNodeB/eNB, or gNodeB/gNB), a transceiver point (transmission reception point, TRP), 3rd generation partnership project (3GPP) subsequent evolution base station, wireless fidelity (wireless fidelity, WiFi) system access node, wireless relay node, wireless backhaul node, etc.
  • BTS base transceiver station
  • Node B Node B
  • eNodeB/eNB evolved Node B
  • gNodeB/gNB gNodeB/gNB
  • TRP transmission reception point
  • 3GPP 3rd generation partnership project
  • the base station may be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, and the like. Multiple base stations may support the aforementioned networks of the same access technology, or may support the aforementioned networks of different access technologies.
  • a base station may contain one or more co-sited or non-co-sited transmission reception points.
  • the network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device.
  • a network device in a vehicle to everything (V2X) technology can be a road side unit (RSU).
  • the following description will be given by taking the access network device as a base station as an example.
  • the multiple network devices in the communication system may be base stations of the same type, or may be base stations of different types.
  • the base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station.
  • a terminal device can communicate with multiple base stations in different access technologies.
  • the core network equipment is used to implement functions such as mobility management, data processing, session management, policy and charging.
  • the names of devices implementing core network functions in systems with different access technologies may be different, which are not limited in this embodiment of the present application.
  • the core network equipment includes: an access and mobility management function (AMF), a session management function (SMF), or a user plane function (UPF) Wait.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • the communication device for implementing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a circuit system, and the device may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • the "network equipment” is, for example, “access network equipment” or “core network equipment”.
  • the UE camps on a cell, which means that the UE has completed the cell selection/reselection process and has selected a cell, and the UE monitors the system information (SI) on the cell, and (in the In most cases) monitor paging.
  • SI system information
  • RRC inactive state There is no RRC connection established between the UE and the base station, but the UE and the base station save configuration information (eg, UE context) related to the UE.
  • RRC_CONNECTED When the UE needs to enter the RRC connected state (RRC_CONNECTED), it can initiate an RRC connection recovery process.
  • RRC idle state no RRC connection is established between the UE and the base station, and the UE and the base station do not save configuration information (eg, UE context) related to the UE.
  • configuration information eg, UE context
  • a suitable cell refers to a cell that satisfies the following conditions: the cell belongs to a part of the public land mobile network (PLMN) selected by the UE, or belongs to a part of the PLMN registered by the UE, or belongs to the UE, etc. and the cell satisfies the S criterion for cell selection.
  • PLMN public land mobile network
  • An acceptable cell refers to a cell on which the UE can camp to obtain restricted services.
  • restricted services include making emergency calls and receiving Earthquake and Tsunami Warning System (ETWS) and Commercial Mobile Alert Service (CMAS) notifications.
  • EWS Earthquake and Tsunami Warning System
  • CMAS Commercial Mobile Alert Service
  • An acceptable cell needs to satisfy the following conditions: the cell is not barred (ie, the system information of the cell indicates that the cell is not barred); and the cell satisfies the S criterion for cell selection.
  • the camped normally state refers to the state of the UE when the UE camps on a suitable cell.
  • the UE in the normal camping state needs to monitor paging, short messages, and system information, perform necessary measurements for the cell reselection evaluation process, and perform cell reselection evaluation when the UE is triggered internally or when the information related to the cell reselection evaluation process changes.
  • Any cell selection state refers to the state of the UE when the UE does not camp on any cell.
  • a UE in any cell selection state needs to perform a cell selection procedure to find a suitable cell. If the UE cannot find a suitable cell after completely searching all radio access technologies (RATs) and all frequency bands supported by the UE, the UE needs to try to find an acceptable cell under any PLMN.
  • RATs radio access technologies
  • the camped on any cell state refers to the state of the UE when the UE is camped on an acceptable cell.
  • the UE in any cell camping state needs to monitor short messages and system information, perform necessary measurements for the cell reselection evaluation process, perform cell reselection evaluation when triggered internally by the UE or when information related to the cell reselection evaluation process changes, and periodically attempt to perform cell reselection evaluation. Find a suitable cell on all RATs and all frequency bands supported by the UE, and migrate to the normal camping state after finding a suitable cell, and perform cell selection (or reselection) when the UE supports voice services but the current cell does not support voice emergency calls ) to an acceptable cell that supports emergency calls.
  • the S criterion for cell selection is mentioned above.
  • the S criteria for cell selection include: Srxlev>0 and Squal>0.
  • Srxlev represents the cell selection reception level value
  • Squal represents the cell selection quality value.
  • Srxlev can satisfy the following relationship:
  • Q rxlevmeas represents the reference signal received power (reference signal received power, RSRP) measurement value of the cell, that is, the RSRP obtained by the UE measuring the reference signal of the cell, and RSRP can be defined as, in the measurement bandwidth under consideration , the power of the reference signal received by the UE.
  • Q rxlevmin represents the minimum received power level required by the cell.
  • Q rxlevminoffset represents the offset.
  • P compensation represents the power compensation value. Indicates the temporary cell offset.
  • Q qualmeas represents the reference signal received quality (reference signal received quality, RSRQ) measurement value of the cell, that is, the RSRQ obtained by the UE measuring the reference signal of the cell, and RSRQ can be defined as: N represents the number of resource blocks (RBs) in the received signal strength indicator (RSSI) measurement of the carrier, and the carrier RSSI is the linear average of the total received power observed by the UE over N RBs , which can include the power value of the useful signal/reference signal, interference and thermal noise, etc.
  • Q qualmin represents the minimum reception quality required by the cell.
  • Q qualminoffset represents the offset. Indicates the temporary cell offset.
  • the number of nouns means “singular nouns or plural nouns", that is, “one or more”. "At least one” means one or more, and “plurality” means two or more. "And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/" generally indicates that the associated objects are an "or” relationship. For example, A/B, means: A or B.
  • At least one item(s) below or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c Can be single or multiple.
  • first and second mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, application scenario, priority, or importance of multiple objects. degree, etc.
  • first RAN-based notification area (RNA) and the second RNA may be the same RNA or different RNAs, and this name does not mean that the two RNAs include different regions, priorities, application scenarios or importance levels.
  • the UE in the RRC inactive state When the UE in the RRC inactive state camps on a suitable cell, it is in the normal camping state.
  • the RRC inactive UE in the normal camping state may perform cell reselection. If a suitable cell cannot be found during the evaluation process of the cell reselection, the UE enters any cell selection state and maintains the RRC inactive state.
  • the UE If a UE in the RRC inactive state in any cell selection state cannot find a suitable cell but an acceptable cell is found, the UE camps on an acceptable cell, enters the camping state of any cell, and switches from the RRC non-active state. The active state transitions to the RRC idle state.
  • the acceptable cell does not belong to the UE-selected or equivalent PLMN (operator), for example, and cannot store the context of the UE. Therefore, for an acceptable cell, the UE cannot be in the RRC inactive state, nor can it initiate normal business. Therefore, the UE can only be in an RRC idle state but not in an RRC inactive state on an acceptable cell, and the UE cannot initiate a normal service on an acceptable cell, but can only make an emergency call.
  • the UE will not autonomously transition back to the RRC inactive state. For example, the UE may continue to perform cell reselection on an acceptable cell, and if an appropriate cell is selected, the UE may return to the appropriate cell and re-enter the normal camping state on the appropriate cell. However, the UE will still remain in the RRC idle state on a suitable cell, and will not actively return to the RRC inactive state.
  • the transition of the RRC state of the UE is an autonomous behavior of the UE, and the network does not perceive it. This results in inconsistent understanding of the state of the UE by the UE and the network, which may cause the network to fail to page the UE.
  • the network does not know this situation, and the network may still think that the UE is in the RRC inactive state. Therefore, when the network paging the UE, it may be that the base station on the RAN side tries several RAN paging first, for example, the base station sends a paging message, and the paging message carries the UE's inactive wireless network temporary identifier, I-RNTI).
  • the UE is actually in the RRC idle state at this time, and the UE in the RRC idle state does not store the I-RNTI, so the UE cannot recognize the I-RNTI in the paging message of the network, and cannot respond to RAN paging.
  • the base station After the RAN paging fails, the base station notifies the core network (CN), and then the CN attempts to page through the CN (for example, the CN sends a paging message to the base station, and the base station sends a paging message, which carries the UE 5G-S temporary mobile subscription identifier (5G S-temporary mobile subscription identifier, 5G-S-TMSI)) to find the UE.
  • 5G-S temporary mobile subscription identifier 5G S-temporary mobile subscription identifier, 5G-S-TMSI
  • the network may perform multiple repeated paging, which wastes paging resources. Moreover, the network sends a paging message at a paging occasion (PO), and each UE calculates its own PO position according to its own identity and paging-related parameters, so as to monitor paging in its own PO.
  • PO paging occasion
  • the PO positions calculated by different UEs may be the same. Therefore, each paging of the network may cause other UEs under each base station with the same PO position as the UE to be instructed to receive paging messages, resulting in irrelevant UEs. Receiving paging affects these unrelated UEs, which is not conducive to the power saving of UEs.
  • the technical solutions of the embodiments of the present application are provided.
  • the terminal device if the terminal device returns from the camping state of any cell to the normal camping state, it can monitor the RAN paging, that is, even if the terminal device is still in the RRC idle state, it can monitor the RAN paging.
  • the network device believes that the terminal device is in the RRC inactive state, so the network device will page the terminal device in the way of RAN paging, and the terminal device can monitor the paging of the network device by monitoring the RAN paging, which improves the performance of the network device.
  • the network equipment may find the UE without having to perform multiple RAN pagings, and the network equipment does not have to notify the core network to page the UE in CN paging, thus saving paging resources.
  • the network device since the network device does not need to page the UE multiple times, the number of times the unrelated UE receives paging is also reduced, the impact on other UEs is reduced, and the other UEs can better save energy.
  • FIG. 2A shows a communication network architecture in the communication system 10 provided by the embodiment of the present application, and the embodiments shown in FIG. 3 or FIG. 4 provided later can be applicable to this architecture.
  • the network device included in FIG. 2A is, for example, the access network device 20 included in the communication system 10
  • the terminal device included in FIG. 2A is, for example, the communication device 30 included in the communication system 10 .
  • the network device and the terminal device can communicate.
  • FIG. 2B shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the communication system includes a core network (new core, CN) and a radio access network (radio access network, RAN).
  • the network device (eg, base station) in the RAN is, for example, the access network device 20 in the communication system 10 .
  • Network equipment in the RAN includes baseband devices and radio frequency devices.
  • the baseband device may be implemented by one or more nodes, and the radio frequency device may be implemented independently from the baseband device, or may be integrated into the baseband device, or partially remote and partially integrated in the baseband device.
  • the network equipment in the RAN may include CUs and DUs, and if there are multiple DUs, the multiple DUs may be centrally controlled by one CU.
  • CU and DU can be divided according to the protocol layer functions of the wireless network they possess.
  • the functions of the packet data convergence protocol (PDCP) layer and the above protocol layers are set at the protocol layers below the CU and PDCP, such as the wireless link.
  • the functions of the channel control (radio link control, RLC) layer and the media access control (media access control, MAC) layer are set in the DU.
  • RLC radio link control
  • MAC media access control
  • the radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited in this embodiment of the present application.
  • FIG. 2C shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the control plane (CP) and user plane (UP) of the CU can also be separated and divided into different entities for implementation, namely the control plane CU entity (CU-CP entity). ) and the user plane CU entity (CU-UP entity).
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may directly encapsulate the signaling at the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling.
  • the CU is classified as a network device on the RAN side.
  • the CU can also be classified as a network device on the CN side, which is not limited in this embodiment of the present application.
  • FIG. 3 shows the first paging method provided by the embodiment of the present application.
  • the UE camps on a third cell.
  • the UE is in a normal camping state in the third cell.
  • the third cell is, for example, a suitable cell of the UE, and the UE is in the RRC inactive state in the third cell, for example.
  • the UE fails to select an appropriate cell during the cell reselection process, and selects an acceptable cell.
  • an acceptable cell is the first cell.
  • the UE may perform cell reselection. For example, the UE does not select an appropriate cell during the evaluation process of cell reselection, but selects an acceptable cell.
  • the UE camps on the first cell and enters the RRC idle state.
  • the UE is in a camping state in any cell in the first cell.
  • the UE Since the UE does not select a suitable cell but selects an acceptable cell (the first cell), the UE camps on the first cell. The UE cannot be in the RRC inactive state on an acceptable cell, and the UE enters the RRC idle state.
  • the UE although the UE enters the RRC idle state, the UE does not need to release the first configuration, and can keep the timer running, for example, the T380 timer, which can be used by the UE to update the The RNA to which the UE belongs.
  • the first configuration may be used for the UE to monitor RAN pages.
  • CN paging and RAN paging can be completed through the same paging process, for example, one paging can include both CN paging and RAN paging, or, CN paging and RAN paging can also be done through different paging Process complete.
  • the paging message can carry the identities of multiple UEs, and the identities of these UEs can all be I-RNTI, then the type of this paging is RAN paging; or, the identities of these UEs can all be 5G-S-TMSI , then the type of this paging is CN paging; or, if the identifiers of these UEs include both I-RNTI and 5G-S-TMSI, the types of this paging include RAN paging and CN paging.
  • the 5G-S-TMSI is the UE identifier of the 5G NR system, and the embodiment of the present application can be applied to other systems, not limited to 5G, in addition to the 5G system. If the solution is applied to other systems, the UE identity may change accordingly.
  • the UE identity may not be 5G-S-TMSI, but may refer to the International Mobile Subscriber Identity (IMSI).
  • the first configuration is a subset of the suspend configuration.
  • paging can be divided into CN-triggered paging and RAN-triggered paging.
  • the paging triggered by the CN is called CN paging, and the paging message in the CN paging process may be called the CN paging message; the paging triggered by the RAN is called RAN paging, and the paging message in the RAN paging process May be referred to as a RAN paging message.
  • the network may initiate CN paging to the UE in the RRC idle state, and may initiate CN paging or RAN paging to the UE in the RRC inactive state.
  • the UE when the UE enters the RRC idle state from the RRC inactive state, the first configuration is originally released.
  • the UE may not release the first configuration when entering the RRC idle state. In this way, if the UE enters a suitable cell from the first cell and returns to the normal camping state, the UE can monitor RAN paging because the first configuration is retained.
  • the network may also think that the UE is in the RRC inactive state, so the network may page the UE in the way of RAN paging, so that the UE's monitoring method for paging is consistent with the network's paging method for the UE. Indicates the success rate of the network finding the UE through paging.
  • the first configuration includes, for example, one or more of the following: the I-RNTI of the UE, the RAN paging cycle, the information of the RNA (for example, called the first RNA) to which the UE belongs, or the configuration of the timer.
  • the first configuration includes the I-RNTI of the UE and the RAN paging cycle; for another example, the first configuration includes the I-RNTI of the UE, the RAN paging cycle, and information about the RNA to which the UE belongs;
  • a configuration includes the I-RNTI of the UE, the RAN paging cycle, the information of the RNA to which the UE belongs, and the configuration of the timer, and so on.
  • the timer is, for example, a T380 timer.
  • RNA includes one or more cells.
  • the last serving network device such as a serving base station
  • the network device on the RAN side knows the RNA to which the UE belongs.
  • the network device may first page the UE within the range of the RNA to which the UE belongs.
  • the first RNA is, for example, the RNA to which the UE belongs before entering any cell camping state.
  • RNAU RAN-based notification area update
  • the UE also needs to periodically initiate the RNAU process, specifically: when the UE enters the RRC inactive state, the timer T380 is started. When the T380 times out, regardless of whether the current RNA of the UE changes, the UE will The RNAU process needs to be initiated to synchronize the RNA information with the RAN.
  • the UE may determine whether to retain the first configuration according to the remaining duration of the timer. For example, if the remaining duration of the timer is greater than or equal to the first threshold, it indicates that the remaining duration of the timer is relatively long, and the UE may be able to re-enter the normal camping state during this period, so as to use the first configuration to monitor the RAN search call, so in this case, the UE can keep the first configuration. However, if the remaining duration of the timer is less than the first threshold, it indicates that the remaining duration of the timer is not much, which may not be enough for the UE to enter the normal camping state.
  • the network device can know that the state of the UE is abnormal without receiving the RNAU process initiated by the UE, so that the network device can notify the CN that it can initiate CN paging when the UE needs to be paged. That is, the network may no longer page the UE through RAN paging. Therefore, if the remaining duration of the timer is less than the first threshold, it is unnecessary for the UE to monitor RAN paging, so in this case, the UE does not need to retain the first configuration. If the UE does not retain the first configuration, if the UE re-enters the normal camping state, the UE may monitor the CN paging in the RRC idle state.
  • the first threshold is determined by the UE itself, or configured by a network device, or can also be specified by a protocol.
  • the first threshold is configured by the network device, and the network device may preconfigure the first threshold in the UE, or the network device may generate the first threshold and send the first threshold.
  • the network device may send the first threshold value to the UE through a unicast message, and the UE may receive the first threshold value from the network device.
  • the network device may send the first threshold to the UE when the UE is in the RRC connected state (for example, the UE is in the RRC connected state before entering the RRC inactive state), or the network device may also be in the RRC inactive state when the UE is in the RRC inactive state Send the first threshold value to the UE in a corresponding manner.
  • the unicast message is, for example, an RRC message, downlink control information (DCI), or a media access control (media access control, MAC) control element (control element, CE) and the like.
  • DCI downlink control information
  • MAC media access control
  • CE control element
  • the following steps take the UE retaining the first configuration as an example.
  • S301 to S303 are all optional steps.
  • the UE reselects from the first cell to the second cell.
  • the UE camps on the first cell and can perform cell reselection. For example, the UE selects a suitable cell in the evaluation process of cell reselection, and the UE can camp on the suitable cell, and the suitable cell is, for example, the second cell. The UE can resume the normal camping state in the second cell, and the UE continues to remain in the RRC idle state in the second cell.
  • the UE monitors the paging.
  • the UE monitoring paging (for example, monitoring RAN paging or CN paging, etc.) described in various embodiments of the present application includes, for example, monitoring paging messages, and may also include monitoring paging downlink control information (DCI).
  • monitoring the paging may further include monitoring the wake up signal.
  • the paging DCI can be used to schedule paging messages.
  • a power saving signal is a signal introduced to achieve the purpose of UE energy saving
  • a wake-up signal is a type of energy saving signal.
  • the network can send WUS before or on the PO to indicate whether the UE needs to monitor the PO or receive a paging message next, so as to reduce the power consumption of the UE.
  • the UE monitors paging for example, monitors the paging DCI at the PO of the UE, and may also include actions such as receiving a paging message after monitoring the paging DCI, that is, "monitoring paging" and "Receive page" can be two processes.
  • the UE monitoring the paging may include the UE receiving the paging message and determining whether the paging message includes the identity of the UE (eg, 5G-S-TMSI or I-RNTI).
  • the network may paging in the RNA to which the UE belongs.
  • the RNA to which the UE belongs refers to the RNA to which the UE belongs before entering the camping state of any cell. RNA. Therefore, optionally, the UE may determine whether the second cell belongs to the first RNA, and if the second cell belongs to the first RNA, the UE may monitor the RAN paging.
  • the information of the first RNA included in the first configuration retained by the UE may include the identity of one or more cells, and the UE determines whether the identity of the second cell is included in the information of the first RNA, if the identity of the second cell is included in the In the information of the first RNA, it indicates that the second cell belongs to the first RNA, and if the identifier of the second cell is not included in the information of the first RNA, it indicates that the second cell does not belong to the first RNA.
  • the information of the first RNA included in the first configuration retained by the UE includes one or more RAN area codes (RAN area codes), and the second cell also broadcasts the RAN area code to which the second cell belongs (for example, the second cell Through system information broadcast), after receiving the RAN area code of the second cell from the second cell, the UE can determine whether the RAN area code of the second cell is included in the information of the first RNA, if the RAN area code of the second cell is included in the information of the first RNA In the information of the first RNA, it indicates that the second cell belongs to the first RNA, and if the RAN area code of the second cell is not included in the information of the first RNA, it indicates that the second cell does not belong to the first RNA.
  • RAN area codes RAN area codes
  • the UE can monitor the paging according to the first configuration.
  • the UE since the UE retains the first configuration, which includes the I-RNTI of the UE, the UE can identify RAN paging, that is, the UE can monitor the RAN although it is in the RRC idle state.
  • RAN paging For example, after the UE receives the paging message, the UE can determine whether the I-RNTI of the UE is included in the paging message, which realizes the identification of the RAN paging.
  • the network may think that the UE is in the RRC inactive state, so the network may page the UE in the way of RAN paging, and page the UE in the way of CN paging.
  • the possibility of the UE is small. Therefore, after the UE receives the paging message, it is not necessary to determine whether the 5G-S-TMSI of the UE is included in the paging message, which reduces the matching process of the UE for the identity and saves power consumption. In this case, the UE can be considered to listen to RAN paging and not to CN paging.
  • the UE can monitor both RAN paging and CN paging.
  • the UE receives the paging message , which not only determines whether the 5G-S-TMSI of the UE is included in the paging message, but also determines whether the I-RNTI of the UE is included in the paging message. That is to say, the UE monitoring paging described in S305 may be monitoring RAN paging and/or CN paging. In FIG. 3 , the UE monitoring RAN paging and CN paging is taken as an example.
  • the network may send CN paging and/or RAN paging, and the network does not necessarily send paging.
  • the step of calling is shown in dashed lines to indicate that this step is optional.
  • the UE may determine the paging cycle of the UE to monitor paging according to the paging cycle of the UE.
  • One way for the UE to determine the paging cycle is: the UE determines the paging cycle with the smallest value among the RAN paging cycle, the default paging cycle (default paging cycle), and the UE-specific paging cycle (UE specific paging cycle). , and the paging cycle with the smallest value is determined as the paging cycle of the UE.
  • the UE determines the paging cycle with the smallest value among the RAN paging cycle and the default paging cycle cycle, and the paging cycle with the smallest value is determined as the paging cycle of the UE.
  • the RAN paging cycle is included in the first configuration, the default paging cycle is broadcast by the network device, and the UE-specific paging cycle is determined through negotiation between the UE and the core network device.
  • the UE In the process of monitoring paging, the UE, for example, receives a paging message. If the UE monitors RAN paging but not CN paging, the UE may not have to determine whether the UE's 5G-S-TMSI is included in the paging message, but only need to determine whether the UE's I-RNTI is included in the paging message middle.
  • the UE ignores the paging message; and if the I-RNTI of the UE is included in the paging message In the paging message, indicating that the UE is paged, the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment process in the second cell to enter the RRC connected state.
  • the UE may determine whether the UE's 5G-S-TMSI and/or I-RNTI is included in the paging message. In this case, if neither the 5G-S-TMSI nor the I-RNTI of the UE is included in the paging message, indicating that the UE is not paged, the UE ignores the paging message; 5G-S-TMSI and/or I-RNTI are included in the paging message, indicating that the UE is being paged, then the UE can perform corresponding operations, for example, the UE initiates the RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE may send indication information (for example, referred to as “referred to as the base station”) to the network device (eg, base station) during the connection establishment procedure
  • the base station e.g., the network device
  • the second indication information may indicate that the UE is a UE in the RRC idle state, or indicates that the UE is a UE in the RRC idle state, and the RRC connection establishment process is initiated due to RAN paging.
  • the UE can send a second message to the network device during the connection establishment process.
  • the indication information helps the network device to understand the situation, and can also prevent the network device from processing the connection establishment request of the UE according to a low priority because other UEs are initiating the connection establishment process.
  • the network device can know that there is a UE in the RRC inactive state performing the connection recovery, then the UE handles the normal processing. That is, it is not necessary to send the second indication information to the network device.
  • the UE releases the first configuration.
  • S305 and S306 are two parallel steps, and the UE should only execute one of the steps in one execution process. And S306 is an optional step.
  • the first configuration retained by the UE includes the information of the first RNA, and the network will page the UE within the scope of the first RNA. If the second cell does not belong to the first RNA, the network may not page the UE in the second cell and the UE may not receive a RAN page for paging the UE in the second cell. Therefore, in this case, the UE does not need to retain the first configuration, but can release the first configuration.
  • the UE can release the first configuration no matter which step the UE is currently performing. Because if the timer expires, the UE should initiate the RNAU process, but the UE cannot initiate the RNAU process because it is in the RRC idle state, and the network device does not receive the RNAU process initiated by the UE, and can know that the state of the UE is abnormal. The device may initiate CN paging when it needs to page the UE subsequently, that is, the network may no longer page the UE through RAN paging. Therefore, if the timer expires, there is no need for the UE to listen to RAN pages anymore. Therefore, in this case, the UE may not need to retain the first configuration. If the UE does not retain the first configuration, if the UE re-enters the normal camping state, the UE can monitor CN paging in the RRC idle state.
  • the UE may release the first configuration.
  • the UE cannot initiate the RNA update process any more. Therefore, if the timer is running in this case, the UE can stop the timer. If the network does not receive the RNAU procedure initiated by the UE, it can know that the state of the UE is abnormal, so that the network can page the UE through CN paging. If the UE re-enters the normal camping state, the UE only needs to monitor CN paging in the RRC idle state.
  • the UE if the UE returns from the camping state of any cell to the normal camping state, even if the UE is still in the RRC idle state, it can monitor the RAN paging.
  • the network device thinks that the UE is in the RRC inactive state, so the network device will page the UE in the way of RAN paging, and the UE can monitor the paging of the network device by monitoring the RAN paging, which improves the paging of the network device.
  • the network equipment may find the UE without having to perform multiple RAN pagings, and the network equipment does not have to notify the core network to page the UE in CN paging, thus saving paging resources.
  • the network device since the network device does not need to page the UE multiple times, the number of times the unrelated UE receives paging is also reduced, the impact on other UEs is reduced, and the other UEs can better save energy.
  • the existing paging mechanism has the problem of paging false alarms, that is, the UE receives and decodes the paging message, but finds that the network does not actually page the UE.
  • the main reason for the generation of paging false alarms is that the PO positions calculated by multiple UEs may be the same, so there is a situation where multiple UEs monitor the same PO.
  • the UE can only obtain the scheduling information of the paging message when receiving the paging DCI, but cannot distinguish whether the paging message is a paging message for the UE. Therefore, the UE will continue to monitor the paging message according to the paging DCI.
  • the identifier (such as 5G-S-TMSI or I-RNTI) can determine whether this paging is for the UE. Therefore, for the UE that is not actually paged, there is an unnecessary PDSCH reception and decoding process, resulting in unnecessary power consumption. Because paging DCI is involved, the paging process is briefly introduced.
  • the basic process of paging is that the network selects a certain paging range and sends the paging DCI in the PO.
  • the paging DCI may include the scheduling information of the paging message, and may also include other information, such as short messages, etc. , because other information has nothing to do with the solutions of the embodiments of the present application, it will not be introduced too much.
  • a paging range is the area where the network sends pages. The area is determined by the network. For example, for a UE in the RRC idle state, the network may use the tracking area (TA) to which the UE belongs as the paging area; for a UE in the RRC inactive state, the network may The belonging RNA is used as the paging range.
  • TA tracking area
  • the UE After the UE receives the paging DCI from the network, if the paging DCI contains scheduling information of the paging message, the UE can receive and decode the paging message on the PDSCH according to the scheduling information.
  • the paging message may include the identity of the UE paged by the network. If the paging message includes the identity of the UE, the UE may perform corresponding operations, and if the paging message does not include the identity of the UE, the UE may ignore the paging message.
  • a paging may include both CN paging and RAN paging, or may only include CN paging or RAN paging.
  • the UE before receiving and decoding the paging message, the UE cannot know the type of this paging, that is, it does not know whether the UE identifier included in the paging message is 5G-S-TMSI or I-RNTI.
  • the UE For a UE in RRC inactive state, the UE needs to monitor CN paging and RAN paging; while for a UE in RRC idle state, the UE only needs to monitor CN paging. Therefore, when a paging only includes RAN paging, the paging message may include the I-RNTI of several UEs, and the UE in the RRC idle state has no I-RNTI and cannot respond to RAN paging. In other words, there is an unnecessary paging reception process.
  • the UE can be paged through a mechanism that distinguishes CN paging and RAN paging.
  • the second paging method according to the embodiment of the present application is provided below.
  • the network paging the UE through the mechanism of distinguishing CN paging and RAN paging, and the UE can also monitor the paging through the mechanism of distinguishing CN paging and RAN paging.
  • the implementation process of this method can continue to refer to FIG. 3.
  • the difference between this method and the embodiment shown in FIG. 3 is that the embodiment shown in FIG. this mechanism. It can be understood that this embodiment of the present application provides an alternative to S305 in the embodiment shown in FIG. 3 .
  • the UE can determine whether the second cell belongs to the first RNA, and if the second cell belongs to the first RNA, the UE can monitor the paging according to the first configuration.
  • the UE determines the paging cycle, etc. can refer to S305 in the embodiment shown in FIG. 3 .
  • the network can perform paging according to the mechanism of distinguishing CN paging and RAN paging, and the mechanism of distinguishing CN paging and RAN paging is to reduce the probability of the UE in the RRC idle state generating paging false alarms. a method.
  • the basic idea of this mechanism is to let the UE know the type of this paging in advance, so as to reduce the process of the UE in the RRC idle state receiving the RAN paging message.
  • This mechanism can be implemented in many ways, and the following examples are introduced.
  • the first implementation mode indicates the paging type.
  • the network device may send the first indication information, and the UE may receive the first indication information from the network device after camping on the second cell.
  • the network device can indicate the paging type in the first indication information, and the paging type includes, for example, RAN paging, CN paging, or RAN paging and CN paging, or it can be understood that the first indication information can indicate this paging Including RAN paging, or indicating that this paging includes CN paging, or indicating that this paging includes RAN paging and CN paging.
  • the first indication information indicates that this paging includes RAN paging messages, it can also be understood as indicating that this paging includes RAN paging and does not include CN paging; if the first indication information indicates that this paging includes RAN paging CN paging can also be understood as indicating that this paging includes CN paging and does not include RAN paging.
  • the first indication information may occupy one or more bits, for example, the first indication information is included in the paging DCI, or included in the wake-up signal.
  • the UE for the UE in the RRC idle state, after receiving the first indication information, if the first indication information indicates that this paging includes RAN paging and does not include CN paging, the UE itself is There is no need to continue listening for pages (ie, RAN pages). However, in the embodiment of the present application, since the UE retains the first configuration, the UE can identify the RAN paging, so the UE can still continue to monitor the AN paging. For example, when the UE receives a RAN paging message, it can be determined whether the I-RNTI of the UE is included in the RAN paging message.
  • the UE ignores the RAN paging message; and if the I-RNTI of the UE is included in the RAN paging message , indicating that the UE is paged, the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE may monitor the RAN paging and not monitor the CN paging, or the UE may also monitor the RAN paging and the CN paging, and the reason may refer to S305 in the embodiment shown in FIG. 3 .
  • the UE receives the first indication information. If the UE monitors RAN paging and does not monitor CN paging, then if the first indication information indicates that this paging includes CN paging and does not include RAN paging, the UE does not need to continue to monitor this paging to save power. consumption. However, if the first indication information indicates that this paging includes RAN paging and does not include CN paging, or indicates that this paging includes RAN paging and CN paging, the UE may continue to monitor this paging.
  • the UE when the UE receives the paging message, it can be determined whether the I-RNTI of the UE is included in the paging message. If the I-RNTI of the UE is not included in the paging message, indicating that the UE is not paged, the UE ignores the paging message; and if the I-RNTI of the UE is included in the CN paging message, indicating that the UE is not paging If the UE is paged, the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE monitors both RAN paging and CN paging, if the first indication information indicates that this paging includes CN paging and does not include RAN paging, the UE continues to monitor this CN paging according to the first indication information call. For example, when the UE receives the paging message, it can be determined whether the 5G-S-TMSI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the 5G-S-TMSI of the UE is included in the paging message , indicating that the UE is paged, the UE can perform corresponding operations, for example, the UE initiates an RRC connection establishment process in the second cell to enter the RRC connected state.
  • the UE may continue to monitor this paging. For example, when the UE receives the paging message, it can be determined whether the I-RNTI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the I-RNTI of the UE is included in the CN paging message, indicating that the UE is not paging If the UE is paged, the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE may continue to monitor this paging. For example, when the UE receives a paging message, it can be determined whether the 5G-S-TMSI and/or I-RNTI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the UE's 5G-S-TMSI and /or the I-RNTI is included in the CN paging message, indicating that the UE is paged, and the UE can perform operations, for example, the UE initiates an RRC connection establishment process in the second cell to enter the RRC connected state.
  • the network (access network device or core network device) divides multiple UEs covered by the network into different groups, and paging the different groups respectively during paging.
  • a grouping manner is, for example, grouping according to the RRC state in which the UEs are located.
  • the UEs are divided into a first type of group and a second type of group, the first type of group includes one or more groups, and the group of the one or more groups includes one or more UEs, and
  • the first type of group includes all UEs in the RRC inactive state;
  • the second type of group includes one or more groups, and the group in the one or more groups includes one or more UEs, and the second type of group includes one or more groups.
  • the type of group includes all UEs in the RRC idle state.
  • the network device can send the group number of the group to which each UE belongs to each UE, so that the UE can know the group number of the group to which the UE belongs; or the UE can determine the group number to which the UE belongs according to the corresponding information, for example, the network can broadcast
  • the group-related parameters corresponding to different RRC states are broadcast, so that the UE can determine the group to which the UE belongs according to the group-related parameters and/or the identity of the UE.
  • the network device may send the first indication information, and the UE may receive the first indication information from the network device after camping on the second cell.
  • the network may indicate the group to be paged this time in the first indication information without indicating the type of paging.
  • the first indication information may carry the group number of the group to be paged this time. After the UE receives the first indication information, if it is determined that the group to be paged this time includes the group to which the UE belongs, it can continue to monitor the paging, and if it is determined that the group to be paged this time does not include the group to which the UE belongs, it can continue to monitor the paging. It may not be necessary to monitor the paging.
  • the UE can also determine the group to which the UE belongs when the UE is in the RRC inactive state. And because the UE retains the first configuration, the UE can monitor the RAN paging, that is, can monitor the paging originally monitored by the UE in the RRC inactive state. Therefore, after the UE receives the first indication information, if the group indicated by the first indication information is the group to which the UE belongs when it is in the RRC inactive state, the UE can also continue to monitor paging according to the first indication information.
  • the first indication information received by the UE includes first information
  • the first information may indicate a first group, for example, the first information includes a group number of the first group, and the first group is a group of a first type.
  • the first information may only indicate the first group without indicating other groups, or the first information may also indicate multiple groups, and the first group is one of the groups indicated by the first information.
  • the network device may page the UE in the paging message for paging the first group, so the UE may Paging for paging the first group may continue to be monitored according to the first information.
  • the paging for paging the first group is, for example, RAN paging. For example, when the UE receives a RAN paging message, the UE can determine whether the I-RNTI of the UE is included in the RAN paging message.
  • the UE If the I-RNTI of the UE is not included in the RAN paging message, it indicates that the UE is not included in the RAN paging message. paging, the UE ignores the RAN paging message; and if the I-RNTI of the UE is included in the RAN paging message, indicating that the UE is paged, the UE can perform corresponding operations, for example, the UE is in the second The cell initiates the RRC connection establishment process to enter the RRC connected state.
  • the UE may monitor the RAN paging and not monitor the CN paging, or may monitor the RAN paging and the CN paging, the reason may refer to S305 in the embodiment shown in FIG. 3 .
  • the UE receives the first indication message. If the UE monitors RAN paging and does not monitor CN paging, then, if the group indicated by the first indication information includes the group to which the UE belongs when in the RRC idle state, the UE does not need to continue to monitor this paging.
  • the first indication information received by the UE includes the second information, and the second information may indicate the second group.
  • the second information includes the group number of the second group, and the second group is the group to which the UE belongs when it is in the RRC idle state. .
  • the UE Since the UE does not have to monitor the paging corresponding to the RRC idle state, the UE does not have to monitor the corresponding paging. However, if the group indicated by the first indication information includes the group to which the UE belongs when it is in the RRC inactive state, the UE may continue to monitor this paging. For example, when the UE receives the paging message, it can be determined whether the I-RNTI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the I-RNTI of the UE is included in the CN paging message, indicating that the UE is not paging If the UE is paged, the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE monitors both RAN paging and CN paging
  • the UE also continues to monitor this paging. For example, the UE receives the second information, and the UE may continue to monitor the page for paging the second group according to the second information. Since the second group includes UEs in the RRC idle state, the paging for paging the second group is, for example, CN paging. For example, when the UE receives the paging message, the UE can determine whether the 5G-S-TMSI of the UE is included in the paging message.
  • the UE If the 5G-S-TMSI of the UE is not included in the paging message, it indicates that the UE is not included in the paging message. is paged, the UE ignores the paging message; and if the 5G-S-TMSI of the UE is included in the paging message, indicating that the UE is paged, the UE can perform corresponding operations.
  • the second cell initiates the RRC connection establishment process to enter the RRC connection state.
  • the UE monitors both RAN paging and CN paging, and the first indication information includes the first information, that is, the group indicated by the first indication information includes the group to which the UE belongs when it is in the RRC inactive state, Then the UE can continue to monitor this paging. For example, when the UE receives the paging message, it can be determined whether the I-RNTI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the I-RNTI of the UE is included in the paging message, indicating that the UE is not paging
  • the UE may perform corresponding operations, for example, the UE initiates an RRC connection establishment procedure in the second cell to enter the RRC connected state.
  • the UE can continue to monitor this paging. For example, when the UE receives a paging message, it can be determined whether the 5G-S-TMSI and/or I-RNTI of the UE is included in the paging message.
  • the UE ignores the paging message; and if the UE's 5G-S-TMSI and /or the I-RNTI is included in the CN paging message, indicating that the UE is paged, and the UE can perform corresponding operations, for example, the UE initiates an RRC connection establishment process in the second cell to enter the RRC connected state.
  • the UE may send indication information (such as a base station) to a network device (such as a base station) during the connection establishment process.
  • indication information such as a base station
  • the second indication information may indicate that the UE is a UE in the RRC idle state, or indicates that the UE is a UE in the RRC idle state, and the RRC connection establishment procedure is initiated due to RAN paging.
  • the UE can send a second message to the network device during the connection establishment process.
  • the indication information helps the network device to understand the situation, and can also prevent the network device from processing the connection establishment request of the UE according to a low priority because other UEs are initiating the connection establishment process.
  • the network device can know that there is a UE in the RRC inactive state performing the connection recovery, then the UE handles the normal processing. That is, it is not necessary to send the second indication information to the network device.
  • the UE if the UE returns from the camping state of any cell to the normal camping state, even if the UE is still in the RRC idle state, it can monitor the RAN paging.
  • the network device thinks that the UE is in the RRC inactive state, so the network device will page the UE in the way of RAN paging, and the UE can monitor the paging of the network device by monitoring the RAN paging, which improves the paging of the network device.
  • the network equipment may find the UE without having to perform multiple RAN pagings, and the network equipment does not have to notify the core network to page the UE in CN paging, thus saving paging resources.
  • the network device since the network device does not need to page the UE multiple times, the number of times the unrelated UE receives paging is also reduced, the impact on other UEs is reduced, and the other UEs can better save energy.
  • the UE can be paged through a mechanism of distinguishing CN paging and RAN paging, thereby reducing the probability of false alarms.
  • the UE does not need to enter the RRC inactive state, but can monitor the RAN paging in the RRC idle state.
  • the third paging method provided by the embodiment of the present application is introduced. In this method, the UE can return to the RRC inactive state, so as to normally monitor the RAN paging in the RRC inactive state.
  • the UE camps on a third cell.
  • the UE is in a normal camping state in the third cell.
  • the third cell is, for example, a suitable cell, and the UE is in the RRC inactive state in the third cell, for example.
  • the UE fails to select a suitable cell during the cell reselection process, and selects an acceptable cell.
  • an acceptable cell is the first cell.
  • the UE may perform cell reselection. For example, the UE does not select an appropriate cell during the evaluation process of cell reselection, but selects an acceptable cell.
  • the UE camps on the first cell and enters the RRC idle state.
  • the UE is in a camping state in any cell in the first cell.
  • the UE Since the UE does not select a suitable cell but selects an acceptable cell (the first cell), the UE camps on the first cell. The UE cannot be in the RRC inactive state on an acceptable cell, and the UE enters the RRC idle state.
  • the UE although the UE enters the RRC idle state, the UE does not need to release at least one item, and can keep the timer running, such as the T380 timer, which can be used by the UE to update the The RNA to which the UE belongs.
  • at least one item can be used to restore the UE to the RRC inactive state. That is to say, when the UE enters the RRC idle state from the RRC inactive state, at least one item is originally released.
  • the UE in order to enable the UE to recover to the RRC inactive state after re-entering the normal camping state, the UE may not release at least one item when entering the RRC idle state.
  • the UE can return to the RRC inactive state because at least one item is retained, so that in the RRC inactive state Monitor pages normally (eg, monitor RAN pages and CN pages).
  • Monitor pages normally eg, monitor RAN pages and CN pages.
  • the network may also think that the UE is in the RRC inactive state, so the network may page the UE in the way of RAN paging, so that the UE's monitoring method for paging is consistent with the network's paging method for the UE. Indicates the success rate of the network finding the UE through paging.
  • the at least one item includes, for example, one or more of the following: a second configuration, a security key, a radio bearer, or a radio resource.
  • a second configuration For example, at least one item includes the second configuration; or, at least one item includes the second configuration and radio resources; or, at least one item includes the second configuration, radio bearer, and radio resources; or, at least one item includes the second configuration, security keys, radio bearers, and radio resources.
  • the security key includes, for example, one or more of keys such as K gNB , SK gNB , SK eNB , K RRCint , K RRCenc , K UPint , or K UPenc .
  • the radio bearers include, for example, a data radio bearer (DRB) and/or a signaling radio bearer (SRB).
  • the radio resources include, for example, a radio link control (RLC) entity, a media access control (media access control, MAC) entity, a packet data convergence protocol (packet data convergence protocol, PDCP) entity or service corresponding to the DRB or SRB. Configuration of one or more entities such as a data adaptation protocol (service data adaptation protocol, SDAP) entity.
  • the second configuration includes, for example, one or more of the following: an RRC inactive access stratum context (UE inactivity AS context) of the UE, a suspension configuration, a transmission resource configuration, or a radio bearer configuration.
  • RRC inactive access stratum context UE inactivity AS context
  • the transmission resource configuration includes, for example, time-frequency resource configuration or channel configuration.
  • the radio bearer configuration may include the configuration of the DRB and/or the configuration of the SRB.
  • the UE may determine whether to reserve at least one item according to the remaining duration of the timer. For example, if the remaining duration of the timer is greater than or equal to the second threshold, it indicates that the remaining duration of the timer is relatively large, and the UE may be able to re-enter the normal camping state during this period, so as to use at least one item to recover to the RRC non-reactive state. Active state, so the UE can keep at least one item in this case.
  • the remaining duration of the timer is less than the second threshold, it indicates that the remaining duration of the timer is not much, which may not be enough for the UE to enter the normal camping state, then if the timer expires, the UE should initiate the RNAU process, but the UE is due to In the RRC idle state and cannot initiate the RNAU process, the network device does not receive the RNAU process initiated by the UE, and can know that the state of the UE is abnormal, so that the network device can notify the CN to initiate CN paging, that is, the network may not The UE is then paged through RAN paging.
  • the UE may monitor the CN paging in the RRC idle state.
  • the second threshold is determined by the UE itself, or configured by the network device, or can also be specified through a protocol.
  • the second threshold is configured by the network device, the network device may preconfigure the second threshold in the UE, or the network device may generate the second threshold and send the second threshold.
  • the network device may send the second threshold to the UE through a unicast message, and the UE may receive the second threshold from the network device.
  • the network device may send the second threshold to the UE when the UE is in the RRC connected state (for example, the UE is in the RRC connected state before entering the RRC inactive state), or the network device may also be in the RRC inactive state when the UE is in the RRC inactive state When the second threshold is sent to the UE in a corresponding manner.
  • the network device may also use a broadcast message to send the second threshold, and there may be multiple UEs that can receive the second threshold, and the UE is one of the multiple UEs.
  • the unicast message and the broadcast message reference may be made to the foregoing related introduction to the first threshold.
  • the second threshold and the first threshold introduced in the foregoing embodiments may or may not be equal.
  • the following steps take the UE retaining at least one item as an example.
  • the UE may Release at least one item. Because if the timer expires, the UE should initiate the RNAU process, but the UE cannot initiate the RNAU process because it is in the RRC idle state, and the network device does not receive the RNAU process initiated by the UE, and can know that the state of the UE is abnormal. The device may notify the CN to initiate CN paging, that is, the network may no longer page the UE through RAN paging.
  • the UE may not need to keep at least one item. If the UE does not retain the configuration related to the inactive state, if the UE re-enters the normal camping state, the UE can monitor the CN paging in the RRC idle state.
  • S404 For more content of S404, reference may be made to S304 in the embodiment shown in FIG. 3 .
  • the UE returns to the RRC inactive state.
  • the UE may determine whether the second cell belongs to the first RNA. For the determination method, reference may be made to S305 in the embodiment shown in FIG. 3 . If the second cell belongs to the first RNA, since the UE retains at least one item, the UE may return to the RRC inactive state. For example, for the UE, since the UE retains at least one item, the UE considers that the RRC inactive state has been restored. For the network, it is considered that the UE is in the RRC inactive state. Therefore, since the UE has not released at least one item, when the UE re-enters the normal camping state, it can automatically return to the RRC inactive state.
  • the UE monitors paging in the RRC inactive state.
  • the manner in which the UE monitors paging in the RRC inactive state is the same as that in the existing UE in the RRC inactive state.
  • the UE may listen to RAN pages and CN pages. If the network paging the UE through the mechanism of distinguishing between RAN paging and CN paging mentioned in the previous embodiment, the UE can also monitor the paging according to the mechanism of distinguishing between RAN paging and CN paging, which will not be repeated here. .
  • a small data transmission (SDT) process is proposed.
  • An implementation of the SDT is that when the UE is in the RRC inactive state, the UE can use the configured resources to send data to the network device, or the UE can send data to the network device through a random access (RA) process.
  • RA random access
  • the UE if the UE was originally in the RRC inactive state, and after entering the camping state in any cell, the RRC inactive state is restored, then the UE can perform the SDT process when it was originally in the RRC inactive state, and/ Or, the UE may perform the SDT procedure after reverting to the RRC inactive state.
  • the UE when the UE is in the RRC inactive state, the UE can perform the SDT procedure if required. For example, after returning to the RRC inactive state, the UE may monitor paging in the RRC inactive state (as described in S406), and/or may perform the SDT procedure in the RRC inactive state.
  • the UE initiates an RNAU procedure, or the UE releases at least one item.
  • the UE may first restore to the RRC inactive state, and in the RRC inactive state, the UE may attempt to initiate an RNAU procedure to update the UE's RNA. If the RNAU procedure is successfully executed, the RNA of the UE has been updated, and the UE can monitor paging and/or execute the SDT procedure in the RRC inactive state. However, if the execution of the RNAU procedure fails and the RNA of the UE cannot be updated, the UE may release at least one item and continue to remain in the RRC idle state. The UE can monitor CN paging and so on in the RRC idle state.
  • the UE may not return to the RRC inactive state, nor initiate the RNAU process, but directly release at least one item and remain in the RRC idle state.
  • the UE can monitor CN paging and so on in the RRC idle state. Thereby, the work of the UE can be reduced, and the realization of the UE can be simplified.
  • the UE may release at least one item.
  • the UE can no longer return to the RRC inactive state to initiate the RNA update process. Therefore, if the timer is running in this case, the UE can stop the timer. If the network does not receive the RNAU procedure initiated by the UE, it can know that the state of the UE is abnormal, so that the network can page the UE through CN paging. If the UE re-enters the normal camping state, the UE only needs to monitor CN paging in the RRC idle state.
  • the UE if the UE returns from the camping state of any cell to the normal camping state, it can return to the RRC inactive state, so that it can normally monitor the RAN paging and/or perform the SDT process.
  • the network device thinks that the UE is in the RRC inactive state, so if the network device needs to page the UE, it will page the UE in the way of RAN paging, and if the UE returns to the RRC inactive state, it will monitor the RAN paging. If the call is made, the paging of the network device can be monitored by monitoring the RAN paging, which improves the success rate of the network device paging to the UE.
  • the network equipment may find the UE without having to perform multiple RAN pagings, and the network equipment does not have to notify the core network to page the UE in CN paging, thus saving paging resources.
  • the network device since the network device does not need to page the UE multiple times, the number of times the unrelated UE receives paging is also reduced, the impact on other UEs is reduced, and the other UEs can better save energy.
  • the UE normally monitors the paging by restoring the RRC inactive state, without changing the behavior of the UE in the RRC idle state, so that the technical solutions of the embodiments of the present application can be better compatible with the existing technology.
  • the UE can also perform the SDT process when it is in the RRC inactive state, so that it can send corresponding data to the network device before entering the RRC connected state or without entering the RRC connected state, so as to reduce the risk of the UE entering the RRC connected state.
  • the resources consumed in the RRC connected state can reduce the power consumption of the UE.
  • FIG. 5 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 500 may be the terminal device or the circuit system of the terminal device described in any one of the embodiments shown in FIG. 3 or the embodiment shown in FIG. method for terminal equipment.
  • a circuit system is a chip system.
  • Communication device 500 includes one or more processors 501 .
  • the processor 501 may also be referred to as a processing unit, and may implement certain control functions.
  • the processor 501 may be a general-purpose processor or a special-purpose processor, or the like. For example, including: baseband processor, central processing unit, etc.
  • the baseband processor may be used to process communication protocols and communication data.
  • the central processing unit may be used to control the communication device 500, execute software programs and/or process data.
  • the different processors may be independent devices, or may be provided in one or more processing circuits, eg, integrated on one or more application specific integrated circuits.
  • the communication apparatus 500 includes one or more memories 502 for storing instructions 504, and the instructions 504 can be executed on the processor, so that the communication apparatus 500 executes the methods described in the above method embodiments.
  • the memory 502 may also store data.
  • the processor and the memory can be provided separately or integrated together.
  • the communication apparatus 500 may include instructions 503 (sometimes also referred to as codes or programs), and the instructions 503 may be executed on the processor, so that the communication apparatus 500 executes the methods described in the above embodiments .
  • Data may be stored in the processor 501 .
  • the communication apparatus 500 may further include a transceiver 505 and an antenna 506 .
  • the transceiver 505 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, an input/output interface, etc., and is used to implement the transceiver function of the communication device 500 through the antenna 506 .
  • the communication device 500 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (universal serial bus, USB) interface, a power management module, an antenna, Speakers, microphones, I/O modules, sensor modules, motors, cameras, or displays, etc. It can be understood that, in some embodiments, the communication apparatus 500 may include more or less components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 501 and the transceiver 505 described in the embodiments of the present application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency identification (RFID), a mixed-signal IC, and an application specific integrated circuit (application specific integrated circuit). integrated circuit, ASIC), printed circuit board (printed circuit board, PCB), or electronic equipment, etc.
  • IC integrated circuit
  • ASIC radio frequency identification
  • PCB printed circuit board
  • electronic equipment etc.
  • it may be an independent device (eg, an independent integrated circuit, a mobile phone, etc.), or may be a part of a larger device (eg, a module that can be embedded in other devices). The description of the terminal device and the network device will not be repeated here.
  • a terminal device for convenience of description, referred to as UE
  • the terminal device includes corresponding means, units and/or circuits for implementing the UE function described in any one of the embodiments shown in FIG. 3 or the embodiments shown in FIG. 4 .
  • a terminal device includes a transceiver module, which is used to support the terminal device to implement a transceiver function, and a processing module, which is used to support the terminal device to process signals.
  • FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 600 may be applicable to the architecture shown in any one of FIG. 1A and FIG. 2A to FIG. 2C .
  • FIG. 6 only shows the main components of the terminal device 600 .
  • the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, and to control the entire terminal device 600 , execute software programs, and process data of the software programs.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • terminal device 600 may include multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.
  • the antenna and control circuit with a transceiving function can be regarded as the transceiving unit 610 of the terminal device 600
  • the processor having a processing function can be regarded as the processing unit 620 of the terminal device 600
  • the terminal device 600 includes a transceiver unit 610 and a processing unit 620 .
  • Transceiver units may also be referred to as transceivers, transceivers, transceivers, and the like.
  • the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 610 may be regarded as a transmitting unit, that is, the transceiver unit 610 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the embodiment of the present application also provides a network device, and the network device can be used in each of the foregoing embodiments.
  • the network device includes means, units and/or circuits for implementing the functions of the network device described in any one of the embodiments shown in FIG. 3 or the embodiments shown in FIG. 4 .
  • the network device includes a transceiver module to support the terminal device to implement a transceiver function, and a processing module to support the network device to process signals.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device may be applicable to the architecture shown in any one of FIGS. 1A and 2A to 2C .
  • the network equipment includes: a baseband device 701 , a radio frequency device 702 , and an antenna 703 .
  • the radio frequency device 702 receives the information sent by the terminal device through the antenna 703, and sends the information sent by the terminal device to the baseband device 701 for processing.
  • the baseband device 701 processes the information of the terminal device and sends it to the radio frequency device 702
  • the radio frequency device 702 processes the information of the terminal device and sends it to the terminal device through the antenna 703 .
  • the baseband device 701 includes one or more processing units 7011 , storage units 7012 and interfaces 7013 .
  • the processing unit 7011 is configured to support the network device to perform the functions of the network device in the foregoing method embodiments.
  • the storage unit 7012 is used to store software programs and/or data.
  • the interface 7013 is used for exchanging information with the radio frequency device 702, and the interface includes an interface circuit for inputting and outputting information.
  • the processing unit is an integrated circuit, such as one or more ASICs, or one or more digital signal processors (DSP), or one or more field programmable logic gates Array (field programmable gate array, FPGA), or a combination of these types of integrated circuits.
  • the storage unit 7012 and the processing unit 7011 may be located in the same circuit, that is, an on-chip storage element. Alternatively, the storage unit 7012 and the processing unit 7011 may be located on a different circuit, that is, an off-chip storage element.
  • the storage unit 7012 may be one memory, or may be a collective term for multiple memories or storage elements.
  • the network device may implement some or all of the steps in the foregoing method embodiments in the form of one or more processing unit schedulers. For example, the corresponding functions of the network device described in the embodiment shown in FIG. 3 or any one of the embodiments shown in FIG. 4 are implemented.
  • the one or more processing units may support wireless access technologies of the same standard, or may support wireless access standards of different standards.
  • the computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • a computer-readable medium may include random access memory (RAM), read-only memory (ROM), or a computer-readable medium capable of carrying or storing instructions or data structures desired program code in the form and any other medium that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • a computer-readable medium capable of carrying or storing instructions or data structures desired program code in the form and any other medium that can be accessed by a computer.

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Abstract

本申请涉及一种寻呼方法及装置。终端设备从第一小区重选或选择到第二小区，则监听RAN寻呼。其中，终端设备在第一小区为任意小区驻留状态，在第二小区为正常驻留状态。在本申请实施例中，终端设备如果从任意小区驻留状态回到正常驻留状态，则可以监听RAN寻呼，提高了网络设备寻呼到该终端设备的成功率。

Description

一种寻呼方法及装置
相关申请的交叉引用
本申请要求在2021年03月31日提交中国国家知识产权局、申请号为202110349513.3、申请名称为“一种寻呼方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种寻呼方法及装置。
背景技术
处于无线资源控制(radio resource control，RRC)非激活态的用户设备(user equipment，UE)驻留在合适的小区(suitable cell)上时，是处于正常驻留(camped normally)状态。对于正常驻留状态下的处于RRC非激活态的UE，如果在小区重选的评估过程(cell reselection evaluation process)中无法找到合适的小区，则该UE进入任意小区选择(any cell selection)状态，并保持RRC非激活态。
处于任意小区选择状态的UE，如果无法找到合适的小区而找到了可接受的小区(acceptable cell)，则该UE驻留到可接受的小区上，进入任意小区驻留(camped on any cell)状态，并从RRC非激活态迁移到RRC空闲态。UE从RRC非激活态迁移到RRC空闲态后，不会自主迁移回RRC非激活态。例如，UE在可接受的小区上可能继续进行小区重选，如果选择到了合适的小区，则UE可重新回到合适的小区，并在合适的小区重新进入正常驻留状态。但是UE在合适的小区上会依然保持在RRC空闲态，而不会主动恢复到RRC非激活态。
UE的这种RRC状态的迁移，都是UE的自主行为，网络对此并不感知。这导致UE和网络对于UE的状态的理解不一致，从而可能导致网络无法寻呼到该UE。
发明内容
本申请实施例提供一种寻呼方法及装置，用于提高网络寻呼到UE的成功率。
第一方面，提供一种寻呼方法，该方法可由终端设备执行，或由电路系统执行，或者由包括终端设备的较大设备执行，该电路系统能够实现终端设备的功能。该方法包括：从第一小区重选或选择到第二小区，其中，所述终端设备在所述第一小区为任意小区驻留状态，所述终端设备在所述第二小区为正常驻留状态；监听无线接入网(radio access network，RAN)寻呼。
在本申请实施例中，终端设备如果从任意小区驻留状态回到正常驻留状态(或者说，终端设备从可接受的小区回到合适的小区)，则可以监听RAN寻呼，也就是说，即使终端设备还处于RRC空闲态，也可以监听RAN寻呼。网络设备会认为终端设备处于RRC非激活态，因此网络设备会以RAN寻呼的方式来寻呼该终端设备，而该终端设备通过监听RAN寻呼，就能监听到网络设备的寻呼，提高了网络设备寻呼到该终端设备的成功率。而且由于网络设备可能通过较少的次数就能寻呼到该终端设备，无需寻呼多次，则与该终端 设备的寻呼时机相同的终端设备也无需多次接收冗余的寻呼，由此也减少了对其他终端设备的干扰，有利于其他终端设备的节能。
在一种可选的实施方式中，监听RAN寻呼，包括：在所述第二小区属于第一基于RAN的通知区域RNA的情况下，监听所述RAN寻呼，所述第一RNA为所述终端设备进入所述任意小区驻留状态前所属的RNA。网络如果要通过RAN寻呼方式寻呼该终端设备，则可能会在该终端设备所属的RNA内寻呼，该终端设备所属的RNA是指该终端设备在进入任意小区驻留状态前所属的RNA，例如第一RNA。因此，如果第二小区属于第一RNA，则终端设备就可以监听RAN寻呼。
在一种可选的实施方式中，所述方法还包括：在处于RRC非激活态的情况下，驻留到所述第一小区，且进入RRC空闲态，所述第一小区为可接受的小区；保留第一配置，和/或，保留至少一项，所述至少一项包括第二配置、安全密钥、无线承载、或无线资源中的一项或多项，所述第一配置用于所述终端设备监听所述RAN寻呼，所述至少一项用于所述终端设备恢复到RRC非激活态。终端设备在从RRC非激活态进入RRC空闲态时，原本是会释放第一配置(或者，释放至少一项)。但是本申请实施例中，为了使得终端设备在重新进入正常驻留状态后能够监听RAN寻呼，因此可以使得终端设备在进入RRC空闲态时不释放第一配置(或者，释放至少一项)。这样，如果该终端设备又从第一小区进入了合适的小区，重新回到正常驻留状态，那么由于保留了第一配置(或者，保留了至少一项)，该终端设备就能够监听RAN寻呼。而网络也可能认为该终端设备处于RRC非激活态，因此网络可能会以RAN寻呼的方式来寻呼该终端设备，从而该终端设备对于寻呼的监听方式与网络对该终端设备的寻呼方式一致，提高了网络通过寻呼找到该终端设备的成功率。
在一种可选的实施方式中，所述方法还包括：维持定时器继续运行，所述定时器用于所述终端设备更新RNA。该定时器例如为T380定时器，或者也可以是其他定时器。
在一种可选的实施方式中，保留第一配置，包括：如果所述定时器的剩余时长大于或等于第一阈值，保留所述第一配置。如果定时器的剩余时长大于或等于第一阈值，则表明定时器剩余的时长较多，终端设备在这段时间内或许能够重新进入正常驻留状态，从而利用该第一配置来监听RAN寻呼，因此在这种情况下，终端设备可以保留第一配置。而如果定时器的剩余时长小于第一阈值，表明定时器剩余的时长已不多，可能不足以使得终端设备进入正常驻留状态，那么如果该定时器超时，终端设备本应发起RNAU流程，但终端设备由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该终端设备发起的RNAU流程，就能获知该终端设备的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该终端设备。因此，如果定时器的剩余时长小于第一阈值，该终端设备就没必要再监听RAN寻呼，所以在这种情况下，终端设备可以不必保留第一配置。
在一种可选的实施方式中，在保留所述第一配置的情况下，所述方法还包括：如果所述定时器超时，释放所述第一配置。如果该定时器超时，终端设备本应发起RNAU流程，但终端设备由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该终端设备发起的RNAU流程，就能获知该终端设备的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该终端设备。因此如果该定时器超时，终端设备也就不必再监听RAN寻呼，因此可以释放第一配置。
在一种可选的实施方式中，所述第一配置包括如下一项或多项：I-RNTI，RAN寻呼周期，所述第一RNA的信息，或，所述定时器的配置。第一配置除了包括如上一项或多项外还可以包括其他信息。终端设备根据第一配置就可以监听RAN寻呼。
在一种可选的实施方式中，所述方法还包括：确定所述RAN寻呼周期、默认寻呼周期以及所述终端设备的特定寻呼周期中的最小值为监听寻呼的周期。终端设备要监听RAN寻呼，可以按照处于RRC非激活态的终端设备确定寻呼周期的方式来确定寻呼周期。例如，终端设备可以确定RAN寻呼周期、默认寻呼周期以及该终端设备的特定寻呼周期中的最小值为监听寻呼的周期。
在一种可选的实施方式中，所述方法还包括：接收所述RAN寻呼；如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。监听寻呼和接收寻呼，可以认为是两个过程，或者，监听寻呼也可以包括接收寻呼，那么该可选的实施方式可改为：监听RAN寻呼，包括：接收所述RAN寻呼；如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。接收RAN寻呼，例如包括接收RAN寻呼消息，或者，包括接收寻呼DCI和RAN寻呼消息，或者，包括接收唤醒信号、寻呼DCI和RAN寻呼消息，等等。如果该UE的I-RNTI包括在该RAN寻呼消息中，表明该UE被寻呼，则UE可根据该RAN寻呼消息所包括的其他内容确定相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
在一种可选的实施方式中，所述方法还包括：接收指示信息，所述指示信息用于指示本次寻呼包括所述RAN寻呼；接收所述RAN寻呼。监听寻呼和接收寻呼，可以认为是两个过程，或者，监听寻呼也可以包括接收寻呼，那么该可选的实施方式可改为：监听RAN寻呼，包括：接收指示信息，所述指示信息用于指示本次寻呼包括所述RAN寻呼；接收所述RAN寻呼。网络可按照区分CN寻呼与RAN寻呼的机制进行寻呼，区分CN寻呼和RAN寻呼的机制是降低处于RRC空闲态的UE产生寻呼虚警的概率的一种方式。如果指示信息指示本次寻呼包括RAN寻呼，对于处于RRC空闲态的终端设备来说，在接收该指示信息后，本身是无需再继续监听寻呼(即，RAN寻呼)。但是本申请实施例中，该终端设备由于保留了第一配置，能够识别RAN寻呼，因此该终端设备依然可以继续监听RAN寻呼。
在一种可选的实施方式中，所述方法还包括：如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。
在一种可选的实施方式中，所述指示信息包括在唤醒信号中，或包括在寻呼DCI中。或者，指示信息也可以包括在其他消息中。
在一种可选的实施方式中，所述方法还包括：接收第一信息，所述第一信息用于指示寻呼第一组，所述第一组包括处于RRC非激活态的一个或多个终端设备，且所述终端设备在处于RRC非激活态时属于所述第一组；接收所述RAN寻呼。监听寻呼和接收寻呼，可以认为是两个过程，或者，监听寻呼也可以包括接收寻呼，那么该可选的实施方式可改为：监听RAN寻呼，包括：接收第一信息，所述第一信息用于指示寻呼第一组，所述第一组包括处于RRC非激活态的一个或多个终端设备，且所述终端设备在处于RRC非激活态时属于所述第一组；接收所述RAN寻呼。网络(接入网设备或核心网设备)将该网络覆盖的多个UE划分为不同的组，在寻呼时对不同的组分别进行寻呼。在终端设备处于RRC非激活态时该终端设备属于第一组，但该终端设备当前处于RRC空闲态，所以实际上该 终端设备并不属于第一组。但由于该终端设备保留了第一配置，且网络设备可能认为该终端设备还处于RRC非激活态，因此网络设备可能会在用于寻呼第一组的寻呼消息中寻呼该终端设备，因此该终端设备可根据第一信息继续监听用于寻呼第一组的寻呼，以提高网络寻找该终端设备的效率。
在一种可选的实施方式中，所述方法还包括：如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。
在一种可选的实施方式中，所述方法还包括：接收第二信息，所述第二信息用于指示寻呼第二组，所述第二组包括处于RRC空闲态的一个或多个终端设备，且所述终端设备属于所述第二组；接收CN寻呼。监听寻呼和接收寻呼，可以认为是两个过程，或者，监听寻呼也可以包括接收寻呼，那么该可选的实施方式可改为：监听RAN寻呼，包括：接收第二信息，所述第二信息用于指示寻呼第二组，所述第二组包括处于RRC空闲态的一个或多个终端设备，且所述终端设备属于所述第二组；接收CN寻呼。在本申请实施例中，终端设备可监听RAN寻呼且不监听CN寻呼，以节省终端设备的功耗；或者，终端设备也可以监听RAN寻呼和CN寻呼，以提高网络寻找该终端设备的效率。
在一种可选的实施方式中，所述方法还包括：如果所述第二小区不属于所述第一RNA，释放第一配置，所述第一配置用于所述终端设备监听所述RAN寻呼。终端设备保留的第一配置所包括的是第一RNA的信息，在终端设备未向网络更新RNA的情况下，网络也会在第一RNA的范围内寻呼该终端设备。如果第二小区不属于第一RNA，那么网络可能不会在第二小区寻呼该终端设备，该终端设备也无法在第二小区接收到用于寻呼该终端设备的RAN寻呼。因此在这种情况下，终端设备也不必再保留第一配置，而是可以释放第一配置。
在一种可选的实施方式中，所述终端设备处于RRC空闲态。终端设备在第二小区可处于RRC空闲态，虽然处于RRC空闲态，但该终端设备依然能够监听RAN寻呼。
在一种可选的实施方式中，保留至少一项，包括：如果所述定时器的剩余时长大于或等于第二阈值，保留所述至少一项。如果定时器的剩余时长大于或等于第二阈值，则表明定时器剩余的时长较多，终端设备在这段时间内或许能够重新进入正常驻留状态，从而利用该至少一项来恢复到RRC非激活态，从而监听RAN寻呼，因此在这种情况下，终端设备可以保留至少一项。而如果定时器的剩余时长小于第二阈值，表明定时器剩余的时长已不多，可能不足以使得终端设备进入正常驻留状态，那么如果该定时器超时，终端设备本应发起RNAU流程，但终端设备由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该终端设备发起的RNAU流程，就能获知该终端设备的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该终端设备。因此，如果定时器的剩余时长小于第二阈值，该终端设备就没必要再恢复到RRC非激活态，所以在这种情况下，终端设备可以不必保留至少一项。
在一种可选的实施方式中，在保留所述至少一项的情况下，所述方法还包括：如果所述定时器超时、且所述终端设备未进入所述正常驻留状态，释放所述至少一项。如果该定时器超时，终端设备本应发起RNAU流程，但终端设备由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该终端设备发起的RNAU流程，就能获知该终端设备的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该终端设备。因此，如果定时器超时，该终端设备就没必要再通过恢复RRC 非激活态来监听RAN寻呼。所以在这种情况下，终端设备可以不必再保留至少一项。
在一种可选的实施方式中，所述第二配置包括如下一项或多项：所述终端设备的RRC非激活态接入层上下文，挂起配置，传输资源配置，或，无线承载配置。第二配置除了包括如上一项或多项外，还可以包括其他信息。
在一种可选的实施方式中，所述方法还包括：在选择到所述第二小区后，从所述RRC空闲态恢复为RRC非激活态。终端设备在选择到第二小区后，可以根据至少一项恢复为RRC非激活态，从而在RRC非激活态下可以正常监听RAN寻呼，提高网络寻找该终端设备的效率。
在一种可选的实施方式中，监听RAN寻呼，包括：在所述RRC非激活态下监听所述RAN寻呼。终端设备恢复到了RRC非激活态，就可以在RRC非激活态下正常监听RAN寻呼。当然终端设备在RRC非激活态下还可能监听CN寻呼，本申请实施例对此不做限制。
在一种可选的实施方式中，所述方法还包括：如果所述第二小区不属于第一RNA，发起基于RAN的通知区域更新过程。如果第二小区不属于第一RNA，则终端设备可先恢复到RRC非激活态，在RRC非激活态下，该终端设备可尝试发起RNAU流程，以更新该终端设备的RNA。
在一种可选的实施方式中，所述方法还包括：如果所述基于RAN的通知区域更新过程失败，释放所述至少一项。如果RNAU流程失败，则网络可能知道终端设备的状态有异，可能会改为通过CN寻呼方式来寻呼该终端设备。因此在这种情况下，终端设备不必再恢复为RRC非激活态，则终端设备可以释放至少一项。
在一种可选的实施方式中，监听RAN寻呼，包括：如果基于RAN的通知区域更新过程成功，在所述RRC非激活态下监听所述RAN寻呼。如果RNAU流程成功，则网络会在更新后的RNA寻呼该终端设备，例如网络设备可能通过RAN寻呼方式来寻呼该终端设备，则终端设备在RRC非激活态下正常监听RAN寻呼即可。
在一种可选的实施方式中，所述方法还包括：如果所述第二小区不属于第一RNA，释放所述至少一项。如果第二小区不属于第一RNA，则终端设备可以发起RNAU流程，或者，终端设备不必发起RNAU流程，而是直接释放至少一项，不再恢复到RRC非激活态，以减少终端设备的操作，简化终端设备的实现。
第二方面，提供另一种寻呼方法，该方法可由网络设备执行，或由包括网络设备的较大设备执行，或由电路系统执行，该电路系统能够实现网络设备的功能。示例性地，所述网络设备为接入网设备，例如基站。该方法包括：生成第一阈值，所述第一阈值用于确定终端设备是否保留第一配置，所述第一配置用于所述终端设备监听RAN寻呼；发送所述第一阈值。例如，网络设备可通过单播或广播等方式来发送第一阈值。
在一种可选的实施方式中，所述第一配置包括如下一项或多项：所述终端设备的I-RNTI，RAN寻呼周期，第一RNA的信息，或，定时器的配置。其中，所述第一RNA为所述终端设备所在的RNA，所述定时器用于所述终端设备更新RNA。
关于第二方面或可选的实施方式所带来的技术效果，可参考对于第一方面或相应的实施方式的技术效果的介绍。
第三方面，提供又一种寻呼方法，该方法可由网络设备执行，或由包括网络设备的较大设备执行，或由电路系统执行，该电路系统能够实现网络设备的功能。示例性地，所述网络设备为接入网设备，例如基站。该方法包括：生成第二阈值，所述第二阈值用于确定 终端设备是否保留至少一项，所述至少一项包括第二配置、安全密钥、无线承载、或无线资源中的一项或多项，所述至少一项用于终端设备恢复到RRC非激活态；发送所述第二阈值。例如，网络设备可通过单播或广播等方式来发送第二阈值。
在一种可选的实施方式中，所述第二配置包括如下一项或多项：所述终端设备的RRC非激活态接入层上下文，挂起配置，传输资源配置，或，无线承载配置。
关于第三方面或可选的实施方式所带来的技术效果，可参考对于第一方面或相应的实施方式的技术效果的介绍。
第四方面，提供一种通信装置。所述通信装置可以为上述第一方面至第三方面中的任意一方面所述的终端设备。所述通信装置具备上述终端设备的功能。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。收发单元能够实现发送功能和接收功能，在收发单元实现发送功能时，可称为发送单元(有时也称为发送模块)，在收发单元实现接收功能时，可称为接收单元(有时也称为接收模块)。发送单元和接收单元可以是同一个功能模块，该功能模块称为收发单元，该功能模块能实现发送功能和接收功能；或者，发送单元和接收单元可以是不同的功能模块，收发单元是对这些功能模块的统称。
其中，所述处理单元，用于从第一小区重选或选择到第二小区，其中，所述终端设备在所述第一小区为任意小区驻留状态，所述终端设备在所述第二小区为正常驻留状态；
所述收发单元(或，所述接收单元)，用于监听RAN寻呼。
再例如，所述通信装置包括：处理器，与存储器耦合，用于执行存储器中的指令，以实现上述第一方面至第三方面中的任意一方面中终端设备所执行的方法。可选的，该通信装置还包括其他部件，例如，天线，输入输出模块，接口等等。这些部件可以是硬件，软件，或者软件和硬件的结合。
第五方面，提供一种通信装置。所述通信装置可以为上述第一方面至第三方面中的任意一方面所述的网络设备。所述通信装置具备上述网络设备的功能。所述网络设备例如为基站，或为基站中的基带装置。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。关于收发单元的实现方式，可参考第四方面的相关介绍。
所述处理单元，用于生成第一阈值，所述第一阈值用于确定终端设备是否保留第一配置，所述第一配置用于所述终端设备监听RAN寻呼；
所述收发单元(或，所述发送单元)，用于发送所述第一阈值。
或者，
所述处理单元，用于生成第二阈值，所述第二阈值用于确定终端设备是否保留至少一项，所述至少一项包括第二配置、安全密钥、无线承载、或无线资源中的一项或多项，所述至少一项用于终端设备恢复到RRC非激活态；
所述收发单元(或，所述发送单元)，用于发送所述第二阈值。
再例如，所述通信装置包括：处理器，与存储器耦合，用于执行存储器中的指令，以实现上述第一方面至第三方面中的任意一方面中网络设备所执行的方法。可选的，该通信装置还包括其他部件，例如，天线，输入输出模块，接口等等。这些部件可以是硬件，软 件，或者软件和硬件的结合。
第六方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当其被运行时，使得上述各方面中终端设备或网络设备所执行的方法被实现。
第七方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得上述各方面所述的方法被实现。
在本申请实施例中，终端设备如果从任意小区驻留状态回到正常驻留状态，则可以监听RAN寻呼，提高了网络设备寻呼到该终端设备的成功率。
附图说明
图1A为本申请实施例的通信系统的示意图；
图1B为UE的RRC状态改变的示意图；
图2A为本申请实施例的一种应用场景的示意图；
图2B为本申请实施例的另一种应用场景的示意图；
图2C为本申请实施例的又一种应用场景的示意图；
图3为本申请实施例提供的一种寻呼方法的流程图；
图4为本申请实施例提供的另一种寻呼方法的流程图；
图5为本申请实施例提供的通信装置的一种示意性框图；
图6为本申请实施例提供的终端设备的一种示意性框图；
图7为本申请实施例提供的网络设备的一种示意性框图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例提供的技术可以应用于图1A所示的通信系统10中，通信系统10包括一个或多个通信装置30(例如，终端设备)，这一个或多个通信装置30经由一个或多个接入网设备20连接到一个或多个核心网设备，以实现多个通信设备之间的通信。所述通信系统例如可以支持2G,3G,4G,或5G(有时也称为new radio，NR)接入技术的通信系统，无线保真(wireless fidelity，Wi-Fi)系统，第三代合作伙伴计划(3rd generation partnership project，3GPP)相关的蜂窝系统，支持多种无线技术融合的通信系统，或者是面向未来的演进系统。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
本申请实施例中，终端设备是一种具有无线收发功能的设备，可以是固定设备，移动设备、手持设备(例如手机)、穿戴设备、车载设备，或内置于上述设备中的无线装置(例如，通信模块，调制解调器，或电路系统等)。所述终端设备用于连接人，物，机器等，可广泛用于各种场景，例如包括但不限于以下场景：蜂窝通信、设备到设备通信(device-to-device，D2D)、车到一切(vehicle to everything，V2X)、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)、物联网(internet of things，IoT)、虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业 控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、智能家具、智能办公、智能穿戴、智能交通，智慧城市(smart city)、无人机、机器人等场景的终端设备。所述终端设备有时可称为用户设备(user equipment，UE)、终端、接入站、UE站、远方站、无线通信设备、或用户装置等等。为描述方便，本申请实施例将终端设备以UE为例进行说明。
本申请实施例中的网络设备，例如包括接入网设备，和/或核心网设备。所述接入网设备为具有无线收发功能的设备，用于与所述终端设备进行通信。所述接入网设备包括但不限于上述通信系统中的基地收发站(BTS)，节点B(Node B)，演进节点B(eNodeB/eNB，或gNodeB/gNB)、收发点(transmission reception point，TRP)，第三代合作伙伴计划(3rd generation partnership project，3GPP)后续演进的基站，无线保真(wireless fidelity，WiFi)系统中的接入节点，无线中继节点，无线回传节点等。所述基站可以是：宏基站，微基站，微微基站，小站，中继站等。多个基站可以支持上述提及的同一种接入技术的网络，也可以支持上述提及的不同接入技术的网络。基站可以包含一个或多个共站或非共站的传输接收点。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit，DU)。网络设备还可以是服务器，可穿戴设备，或车载设备等。例如，车到一切(vehicle to everything，V2X)技术中的网络设备可以为路侧单元(road side unit，RSU)。以下对接入网设备以为基站为例进行说明。所述通信系统中的多个网络设备可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同接入技术中的多个基站进行通信。所述核心网设备用于实现移动管理，数据处理，会话管理，策略和计费等功能。不同接入技术的系统中实现核心网功能的设备名称可以不同，本申请实施例并不对此进行限定。以5G系统为例，所述核心网设备包括：访问和移动管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、或用户面功能(user plane function，UPF)等。
本申请实施例中，用于实现网络设备功能的通信装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如电路系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
在后文中，所述的“网络设备”例如为“接入网设备”或“核心网设备”。
驻留(camp)：UE驻留在某个小区，是指UE已完成小区选择/重选过程并已选定一个小区，UE在该小区上监听系统信息(system information，SI)，以及(在大多数情况下)监听寻呼(paging)。
RRC非激活态(RRC_INACTIVE)：UE和基站之间没有建立RRC连接，但UE和基站保存有该UE相关的配置信息(例如，UE上下文)。UE需要进入RRC连接态(RRC_CONNECTED)时，可以发起RRC连接恢复过程。
RRC空闲态(RRC_IDLE)：UE和基站之间没有建立RRC连接，且UE和基站没有保存该UE相关的配置信息(例如，UE上下文)。UE需要进入RRC连接态时(例如，业务到来或触发业务时)，不能发起RRC连接恢复过程，而需要发起RRC连接建立过程。
合适的小区(suitable cell)，是指满足如下条件的小区：该小区属于UE选择的公共陆地移动网(public land mobile network，PLMN)的一部分，或属于UE注册的PLMN的一 部分，或属于UE等效PLMN列表内的PLMN的一部分；且，该小区满足小区选择的S准则。
可接受的小区(acceptable cell)，是指UE可驻留在其上以获取受限服务的小区。其中，受限服务包括发出紧急呼叫、以及接收地震和海啸预警系统(earthquake and tsunami warning system，ETWS)和商业移动告警服务(commercial mobile alert service，CMAS)通知。可接受的小区需要满足如下条件：该小区没有被禁止(即该小区的系统信息指示该小区没有被禁止(barred))；且，该小区满足小区选择的S准则。
正常驻留(camped normally)状态，是指UE驻留在合适的小区时UE的状态。处于正常驻留状态的UE需要监听寻呼、短消息、系统信息，执行小区重选评估过程的必要测量，在UE内部触发或小区重选评估过程相关信息改变时执行小区重选评估。
任意小区选择(any cell selection)状态，是指UE未驻留在任何小区时UE的状态。处于任意小区选择状态的UE需要执行小区选择过程以寻找合适的小区。如果UE在完全搜索完UE所支持的所有无线接入技术(radio access technology，RAT)和所有频段后都不能找到合适的小区，则UE需要尝试寻找任意PLMN下的可接受的小区。
任意小区驻留(camped on any cell)状态，是指UE驻留在可接受的小区时UE的状态。处于任意小区驻留状态的UE需要监听短消息、系统信息，执行小区重选评估过程的必要测量，在UE内部触发或小区重选评估过程相关信息改变时执行小区重选评估，定期地尝试在UE所支持的所有RAT和所有频段上寻找合适的小区，并在找到合适的小区后迁移到正常驻留状态，在UE支持语音业务但当前小区不支持语音紧急呼叫时执行小区选择(或重选)到一个支持紧急呼叫的可接受小区。
如上提到了小区选择的S准则。小区选择的S准则包括：Srxlev>0且Squal>0。其中，Srxlev表示小区选择接收水平值，Squal表示小区选择质量值。其中，Srxlev可满足如下关系：
Figure PCTCN2022081500-appb-000001
在公式1中，Q rxlevmeas表示小区的参考信号接收功率(reference signal received power，RSRP)测量值，即，UE对小区的参考信号进行测量所得到的RSRP，RSRP可以定义为，在考察的测量带宽内，UE所接收到的参考信号的功率。Q rxlevmin表示小区要求的最小接收功率等级。Q rxlevminoffset表示偏移量。P compensation表示功率补偿值。
Figure PCTCN2022081500-appb-000002
表示临时小区偏移量。
Squal可满足如下关系：
Figure PCTCN2022081500-appb-000003
在公式2中，Q qualmeas表示小区的参考信号接收质量(reference signal received quality，RSRQ)测量值，即，UE对小区的参考信号进行测量所得到的RSRQ，RSRQ可以定义为：
Figure PCTCN2022081500-appb-000004
N表示载波的接收信号强度指示(received signal strength indicator，RSSI)测量中的资源块(resource block，RB)的数量，载波RSSI是UE在N个RB上观测到的总的接收功率的线性平均值，它可以包括有用信号/参考信号的功率值、干扰和热噪声等。 Q qualmin表示小区要求的最小接收质量。Q qualminoffset表示偏移量。
Figure PCTCN2022081500-appb-000005
表示临时小区偏移量。
本申请实施例中，对于名词的数目，除非特别说明，表示“单数名词或复数名词”，即"一个或多个”。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。例如，A/B，表示：A或B。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，表示：a,b,c,a和b,a和c,b和c,或a和b和c，其中a,b,c可以是单个，也可以是多个。
本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、应用场景、优先级或者重要程度等。例如，第一基于RAN的通知区域(RAN-based notification area，RNA)和第二RNA，可以是同一个RNA，也可以是不同的RNA，且，这种名称也并不是表示这两个RNA包括的区域、优先级、应用场景或者重要程度等的不同。
可参考图1B。RRC非激活态UE驻留在合适的小区上时，是处于正常驻留状态。正常驻留状态下的RRC非激活态UE可能进行小区重选，如果在小区重选的评估过程中无法找到合适的小区，则该UE进入任意小区选择状态，并保持RRC非激活态。
处于任意小区选择状态的RRC非激活态的UE，如果无法找到合适的小区而找到了可接受的小区，则该UE驻留到可接受的小区上，进入任意小区驻留状态，并从RRC非激活态迁移到RRC空闲态。其中，可接受的小区例如不属于UE选择的或等效的PLMN(运营商)等，不能存储UE的上下文，所以对于可接受的小区来说，该UE不能处于RRC非激活态，也不能发起正常业务。因此，UE在可接受的小区上只能处于RRC空闲态而不能处于RRC非激活态，且UE在可接受的小区上不能发起正常业务，而只能进行紧急呼叫。
如果UE从RRC非激活态迁移到RRC空闲态，则UE不会自主迁移回RRC非激活态。例如，UE在可接受的小区上可能继续进行小区重选，如果选择到了合适的小区，则UE可重新回到合适的小区，并在合适的小区上重新进入正常驻留状态。但是UE在合适的小区上会依然保持在RRC空闲态，而不会主动恢复到RRC非激活态。
UE的这种RRC状态的迁移，都是UE的自主行为，网络对此并不感知。这导致UE和网络对于UE的状态的理解不一致，从而可能导致网络无法寻呼到该UE。
例如，假设UE原本处于RRC非激活态并驻留在合适的小区上，由于覆盖问题，该UE通过小区重选过程进入了任意小区驻留状态，并自主迁移至RRC空闲态。但网络不了解这一情况，网络可能仍然认为该UE处于RRC非激活态。因此，当网络寻呼该UE时，可能是RAN侧的基站首先尝试若干次RAN寻呼，例如基站发送寻呼消息，寻呼消息中携带该UE的非激活无线网络临时标识(inactive-radio network temporary identifier，I-RNTI)。但此时该UE实际已经处于RRC空闲态，处于RRC空闲态的UE未存储I-RNTI，因此UE无法识别网络的寻呼消息中的I-RNTI，也无法响应RAN寻呼。RAN寻呼失败后，基站通知核心网(core network，CN)，再由CN尝试通过CN寻呼(例如，CN向基站发送寻呼消息，基站再发送寻呼消息，寻呼消息中携带该UE的5G-S临时移动签约标识(5G  S-temporary mobile subscription identifier，5G-S-TMSI))来寻找该UE。这一过程中，网络可能进行多次重复的寻呼，较为浪费寻呼资源。且，网络是在寻呼时机(paging occasion，PO)中发送寻呼消息，各个UE是根据自己的标识和寻呼相关的参数计算自己的PO位置，从而在各自的PO中监听寻呼。不同的UE所计算的PO的位置有可能会相同，因此，网络的每次寻呼都可能使得各基站下与该UE的PO位置相同的其他UE被指示接收寻呼消息，导致不相关的UE接收寻呼，影响了这些不相关UE，不利于UE的省电。
鉴于此，提供本申请实施例的技术方案。在本申请实施例中，终端设备如果从任意小区驻留状态回到正常驻留状态，则可以监听RAN寻呼，也就是说，即使终端设备还处于RRC空闲态，也可以监听RAN寻呼。网络设备认为终端设备处于RRC非激活态，因此网络设备会以RAN寻呼的方式来寻呼该终端设备，而该终端设备通过监听RAN寻呼，就能监听到网络设备的寻呼，提高了网络设备寻呼到该终端设备的成功率。网络设备可能不必进行多次RAN寻呼就能找到该UE，且网络设备也不必通知核心网来以CN寻呼方式寻呼该UE，因此节省了寻呼资源。且网络设备由于无需多次寻呼该UE，由此也减少了不相关的UE接收寻呼的次数，减少了对其他UE的影响，使得其他UE能够更好地节能。
图2A示出了本申请实施例提供的通信系统10中的一种通信网络架构，后续提供的图3或图4所示的实施例均可适用于该架构。图2A所包括的网络设备，例如为通信系统10所包括的接入网设备20，图2A所包括的终端设备，例如为通信系统10所包括的通信装置30。网络设备与终端设备能够进行通信。
图2B示出了本申请实施例提供的通信系统10中的另一种通信网络架构。如图2B所示，通信系统包括核心网(new core，CN)和无线接入网(radio access network，RAN)。其中RAN中的网络设备(例如，基站)例如为通信系统10中的接入网设备20。RAN中的网络设备包括基带装置和射频装置。基带装置可以由一个或多个节点实现，射频装置可以从基带装置拉远独立实现，也可以集成基带装置中，或者部分拉远部分集成在基带装置中。RAN中的网络设备可以包括CU和DU，如果有多个DU，则多个DU可以由一个CU集中控制。CU和DU可以根据其具备的无线网络的协议层功能进行划分，例如分组数据汇聚协议(packet data convergence protocol，PDCP)层及以上协议层的功能设置在CU，PDCP以下的协议层，例如无线链路控制(radio link control，RLC)层和媒体接入控制(media access control，MAC)层等的功能设置在DU。需要说明的是，这种协议层的划分仅仅是一种举例，还可以在其它协议层划分。射频装置可以拉远，不放在DU中，也可以集成在DU中，或者部分拉远部分集成在DU中，本申请实施例不作任何限制。
图2C示出了本申请实施例提供的通信系统10中的另一种通信网络架构。相对于图2B所示的架构，还可以将CU的控制面(control plane，CP)和用户面(user plane，UP)分离，分成不同实体来实现，分别为控制面CU实体(CU-CP实体)和用户面CU实体(CU-UP实体)。在该网络架构中，CU产生的信令可以通过DU发送给终端设备，或者终端设备产生的信令可以通过DU发送给CU。DU可以不对该信令进行解析而直接通过协议层封装而透传给终端设备或CU。在该网络架构中，将CU划分为作为RAN侧的网络设备，此外，也可以将CU划分作为CN侧的网络设备，本申请实施例对此不做限制。
下面结合附图介绍本申请实施例提供的方法。在本申请的各个实施例对应的附图中，凡是用虚线表示的步骤均为可选的步骤。
请参考图3，为本申请实施例提供的第一种寻呼方法。
S301、UE驻留在第三小区。其中，UE在第三小区处于正常驻留状态。
第三小区例如是该UE的合适的小区，UE在第三小区例如处于RRC非激活态。
S302、UE在小区重选过程中未选择到合适的小区，且选择到可接受的小区。例如可接受的小区为第一小区。
UE驻留在第三小区的过程中，可进行小区重选。例如UE在小区重选的评估过程中未选择到合适的小区，而选择到了可接受的小区。
S303、UE驻留到第一小区，且进入RRC空闲态。其中，UE在第一小区处于任意小区驻留状态。
由于UE并未选择到合适的小区，而是选择到了可接受的小区(第一小区)，则UE驻留到第一小区。UE在可接受的小区上不能处于RRC非激活态，UE进入RRC空闲态。
但是在本申请实施例中，虽然UE进入了RRC空闲态，但UE可以不必释放第一配置，以及可以保持定时器继续运行，该定时器例如为T380定时器，T380定时器可用于UE更新该UE所属的RNA。第一配置可用于该UE监听RAN寻呼。其中，CN寻呼和RAN寻呼可以通过同一个寻呼过程完成，例如一次寻呼可以既包括CN寻呼也包括RAN寻呼，或者，CN寻呼和RAN寻呼也可以通过不同的寻呼过程完成。例如，寻呼消息可携带多个UE的标识，这些UE的标识可以均为I-RNTI，那么本次寻呼的类型就是RAN寻呼；或者，这些UE的标识可以均为5G-S-TMSI，则本次寻呼的类型就是CN寻呼；或者，这些UE的标识既包括I-RNTI也包括5G-S-TMSI，则本次寻呼的类型就包括RAN寻呼和CN寻呼。在本申请实施例中，5G-S-TMSI是5G NR系统的UE标识，而本申请实施例除了可以应用于5G系统外，还可应用于其他系统，不限于5G，如果将本申请实施例的方案应用于其他系统，则UE标识可能随之变化，例如在4G LTE系统中，UE标识可能不是5G-S-TMSI，而可以是指国际移动用户识别码(international mobile subscriber identity，IMSI)。
例如第一配置为挂起配置(suspend configuration)的子集。其中，根据触发寻呼的网元不同，寻呼可以分为CN触发的寻呼和RAN触发的寻呼。其中，将CN触发的寻呼称为CN寻呼，CN寻呼过程中的寻呼消息可称为CN寻呼消息；将RAN触发的寻呼称为RAN寻呼，RAN寻呼过程中的寻呼消息可称为RAN寻呼消息。网络可能对处于RRC空闲态的UE发起CN寻呼，可能对处于RRC非激活态的UE发起CN寻呼或RAN寻呼。
也就是说，UE在从RRC非激活态进入RRC空闲态时，原本是会释放第一配置。但是本申请实施例中，为了使得UE在重新进入正常驻留状态后能够监听RAN寻呼，因此可以使得UE在进入RRC空闲态时不释放第一配置。这样，如果该UE又从第一小区进入了合适的小区，重新回到正常驻留状态，那么由于保留了第一配置，该UE就能够监听RAN寻呼。而网络也可能认为该UE处于RRC非激活态，因此网络可能会以RAN寻呼的方式来寻呼该UE，从而该UE对于寻呼的监听方式与网络对该UE的寻呼方式一致，提高了网络通过寻呼找到该UE的成功率。
第一配置例如包括如下一项或多项：该UE的I-RNTI，RAN寻呼周期，该UE所属的RNA(例如称为第一RNA)的信息，或，定时器的配置。例如，第一配置包括该UE的I-RNTI和RAN寻呼周期；又例如，第一配置包括该UE的I-RNTI、RAN寻呼周期、以及该UE所属的RNA的信息；再例如，第一配置包括该UE的I-RNTI、RAN寻呼周期、该UE所属的RNA的信息、以及定时器的配置，等等。该定时器例如为T380定时器。
其中，RNA包括一个或多个小区。处于RRC非激活态的UE可由该UE的上一个服 务网络设备(例如服务基站)为该UE配置RNA。RAN侧的网络设备(例如基站)知道UE所属的RNA，当网络设备对某个UE发起寻呼时，网络设备可能首先会在该UE所属的RNA范围内寻呼该UE。第一RNA例如为该UE进入任意小区驻留状态前所属的RNA。
当UE在RNA范围内移动时，可以不通知RAN侧的网络设备。而当UE离开当前的RNA范围时，需要触发基于RAN的通知区域更新(RAN-based notification area update，RNAU)过程，以通知网络设备，该UE当前的RNA已经改变。此外，为了维护RNA，UE还需要周期性地发起RNAU过程，具体为：当UE进入RRC非激活态时，启动定时器T380，当T380超时后，无论该UE当前的RNA是否改变，该UE都需要发起RNAU过程，与RAN进行RNA的信息同步。
作为一种可选的实施方式，UE可以根据定时器的剩余时长确定是否保留第一配置。例如，如果定时器的剩余时长大于或等于第一阈值，则表明定时器剩余的时长较多，UE在这段时间内或许能够重新进入正常驻留状态，从而利用该第一配置来监听RAN寻呼，因此在这种情况下，UE可以保留第一配置。而如果定时器的剩余时长小于第一阈值，表明定时器剩余的时长已不多，可能不足以使得UE进入正常驻留状态，那么如果该定时器超时，UE本应发起RNAU流程，但UE由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络设备可以通知CN在需要寻呼该UE时可发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该UE。因此，如果定时器的剩余时长小于第一阈值，该UE就没必要再监听RAN寻呼，所以在这种情况下，UE可以不必保留第一配置。如果UE未保留第一配置，那么UE如果重新进入正常驻留状态，则UE在RRC空闲态下监听CN寻呼即可。
第一阈值例如由UE自行确定，或者由网络设备配置，或者也可以通过协议规定。
例如第一阈值由网络设备配置，则网络设备可以将第一阈值预配置在该UE中，或者网络设备可以生成第一阈值，发送第一阈值。例如网络设备可通过单播消息向该UE发送第一阈值，则UE可接收来自网络设备的第一阈值。例如网络设备可在该UE处于RRC连接态时将第一阈值发送给该UE(例如该UE在进入RRC非激活态前处于RRC连接态)，或者网络设备也可以在该UE处于RRC非激活态时通过相应方式将第一阈值发送给该UE。该单播消息例如为RRC消息、下行控制信息(downlink control information，DCI)、或媒体接入控制(media access control，MAC)控制元素(control element，CE)等。如果网络设备将第一阈值发送给UE，那么网络设备也可以采用广播消息发送第一阈值，则可能有多个UE都能接收第一阈值，该UE是这多个UE中的一个。该广播消息例如为系统消息或其他广播消息。
如下的各个步骤以UE保留了第一配置为例。
其中，S301～S303均为可选的步骤。
S304、UE从第一小区重选到第二小区。
UE驻留在第一小区上，可进行小区重选。例如UE在小区重选的评估过程中选择到了合适的小区，则UE可驻留到该合适的小区，该合适的小区例如为第二小区。UE在第二小区内可恢复正常驻留状态，且UE在第二小区继续保持处于RRC空闲态。
S305、UE监听寻呼。
本申请的各个实施例所述的UE监听寻呼(例如监听RAN寻呼或CN寻呼等)，例如包括监听寻呼消息，还可以包括监听寻呼下行控制信息(downlink control information，DCI)。 另外，如果涉及到唤醒信号(wake up signal，WUS)，则监听寻呼还可以包括监听唤醒信号。其中，寻呼DCI可用于调度寻呼消息。节能信号(power saving signal)是一种为了达到UE节能目的而引入的信号，唤醒信号属于节能信号的一种。网络可以在PO前或者PO上发送WUS，指示UE接下来是否需要监听PO或接收寻呼消息，以减小UE的功耗。
在本申请实施例中，UE监听寻呼，例如是在UE的PO监听寻呼DCI，在监听到寻呼DCI之后可能还包括接收寻呼消息等动作，也就是说，“监听寻呼”和“接收寻呼”可以是两个过程。或者，UE监听寻呼，可以包括UE接收寻呼消息，并确定该寻呼消息是否包括该UE的标识(例如5G-S-TMSI或I-RNTI)。
网络如果要通过RAN寻呼方式寻呼该UE，则可能会在该UE所属的RNA内寻呼，该UE所属的RNA是指该UE在进入任意小区驻留状态前所属的RNA，例如第一RNA。因此可选的，UE可确定第二小区是否属于第一RNA，如果第二小区属于第一RNA，则UE可监听RAN寻呼。例如，UE保留的第一配置包括的第一RNA的信息可包括一个或多个小区的标识，UE确定第二小区的标识是否包括在第一RNA的信息中，如果第二小区的标识包括在第一RNA的信息中，表明第二小区属于第一RNA，而如果第二小区的标识未包括在第一RNA的信息中，表明第二小区不属于第一RNA。又例如，UE保留的第一配置包括的第一RNA的信息包括一个或多个RAN区域码(RAN area code)，而第二小区也会广播第二小区所属的RAN区域码(例如第二小区通过系统信息广播)，UE从第二小区接收第二小区的RAN区域码后，可确定第二小区的RAN区域码是否包括在第一RNA的信息中，如果第二小区的RAN区域码包括在第一RNA的信息中，则表明第二小区属于第一RNA，而如果第二小区的RAN区域码未包括在第一RNA的信息中，则表明第二小区不属于第一RNA。
如果第二小区属于第一RNA，则由于UE保留了第一配置，那么UE就可以按照第一配置来监听寻呼。在本申请实施例中，由于UE保留了第一配置，第一配置包括该UE的I-RNTI，因此该UE能够识别RAN寻呼，也就是说，该UE虽然处于RRC空闲态，但能够监听RAN寻呼。例如该UE接收寻呼消息后，该UE可以确定该UE的I-RNTI是否包括在该寻呼消息中，这就实现了对RAN寻呼的识别。如果考虑到网络对该UE的状态的理解，例如网络可能认为该UE处于RRC非激活态，因此网络可能会按照RAN寻呼的方式来寻呼该UE，通过CN寻呼的方式来寻呼该UE的可能性较小，因此，该UE接收寻呼消息后，不必确定该UE的5G-S-TMSI是否包括在该寻呼消息中，减少UE对于标识的匹配过程，节省功耗。在这种情况下，可以认为该UE监听RAN寻呼而不监听CN寻呼。或者，为了更为保险，防止网络也有可能通过CN寻呼的方式来寻呼该UE，则UE可以既监听RAN寻呼也监听CN寻呼，在这种情况下，该UE接收寻呼消息后，既确定该UE的5G-S-TMSI是否包括在该寻呼消息中，也确定该UE的I-RNTI是否包括在该寻呼消息中。也就是说，S305所述的UE监听寻呼，可以是监听RAN寻呼和/或CN寻呼。在图3中，以UE监听RAN寻呼和CN寻呼为例。另外，虽然UE监听CN寻呼和RAN寻呼，但网络可能下发的是CN寻呼和/或RAN寻呼，且网络也并不一定会下发寻呼，因此图3中网络下发寻呼的步骤用虚线表示，以指示该步骤是可选的。
例如，UE可确定该UE的寻呼周期，从而按照该UE的寻呼周期来监听寻呼。UE确定寻呼周期的一种方式为：UE确定RAN寻呼周期、默认寻呼周期(default paging cycle)、以及UE特定寻呼周期(UE specific pagingcycle)这三者中取值最小的寻呼周期，并将该 取值最小的寻呼周期确定为该UE的寻呼周期。或者，如果该UE并未被配置UE特定寻呼周期，那么该UE确定寻呼周期的另一种方式为：UE确定RAN寻呼周期和默认寻呼周期这两者中取值最小的寻呼周期，并将该取值最小的寻呼周期确定为该UE的寻呼周期。其中，RAN寻呼周期包括在第一配置中，默认寻呼周期是网络设备广播的，UE特定寻呼周期是UE与核心网设备协商确定的。
UE在监听寻呼的过程中，例如接收了寻呼消息。如果UE监听RAN寻呼而不监听CN寻呼，则UE可不必确定UE的5G-S-TMSI是否包括在该寻呼消息中，而只需确定UE的I-RNTI是否包括在该寻呼消息中。在这种情况下，如果该UE的I-RNTI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的I-RNTI包括在该寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
如果UE既监听RAN寻呼也监听CN寻呼，则UE可确定该UE的5G-S-TMSI和/或I-RNTI是否包括在该寻呼消息中。在这种情况下，如果该UE的5G-S-TMSI和I-RNTI均不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的5G-S-TMSI和/或I-RNTI包括在该寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
如果处于RRC空闲态的UE由于监听并响应于RAN寻呼而发起了RRC连接建立过程，那么可选的，该UE可在连接建立过程中向网络设备(例如基站)发送指示信息(例如称为第二指示信息)，第二指示信息可指示该UE是处于RRC空闲态的UE，或指示该UE是处于RRC空闲态的UE，且是因为RAN寻呼而发起RRC连接建立过程。因为网络设备是认为寻呼了处于RRC非激活态的UE，但实际上该UE是在处于RRC空闲态的情况下响应的RAN寻呼，因此UE可在连接建立过程中向网络设备发送第二指示信息，有助于网络设备了解该情况，也可以避免网络设备以为是其他UE在发起连接建立过程而按照低优先级处理该UE的连接建立请求。而如果是处于RRC非激活态的UE由于监听并响应于RAN寻呼而发起了RRC连接恢复过程，对此网络设备能够知道是有RRC非激活态的UE在进行连接恢复，那么该UE正常处理即可，不必向网络设备发送第二指示信息。
S306、在第二小区不属于第一RNA的情况下，UE释放第一配置。
其中，S305和S306是两个并列的步骤，UE在一次执行过程中应该只会执行其中一个步骤。且S306为可选的步骤。
UE保留的第一配置所包括的是第一RNA的信息，网络会在第一RNA的范围内寻呼该UE。如果第二小区不属于第一RNA，那么网络可能不会在第二小区寻呼该UE，该UE也无法在第二小区接收到用于寻呼该UE的RAN寻呼。因此在这种情况下，UE也不必再保留第一配置，而是可以释放第一配置。
可选的，在UE保留第一配置后，只要定时器超时，无论UE当前正在执行上述的那个步骤，UE都可以释放第一配置。因为如果该定时器超时，UE本应发起RNAU流程，但UE由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络设备在后续需要寻呼该UE时可以发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该UE。因此，如果定时器超时，该UE就没必要再监听RAN寻呼。所以在这种情况下，UE可以不必再保留第一配置。如果UE未保留第一配置，那么UE如果重新进入正常驻留状态，则UE在RRC空闲态下监 听CN寻呼即可。
在前文介绍了几种UE可能释放第一配置的情况，在UE释放了第一配置的情况下，UE无法再发起RNA更新过程。因此，如果在这种情况下定时器处于运行状态，则UE可以停止该定时器。网络未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络可以通过CN寻呼方式来寻呼该UE。该UE如果重新进入正常驻留状态，则UE在RRC空闲态下监听CN寻呼即可。
在本申请实施例中，UE如果从任意小区驻留状态回到正常驻留状态，即使UE还处于RRC空闲态，也可以监听RAN寻呼。网络设备认为UE处于RRC非激活态，因此网络设备会以RAN寻呼的方式来寻呼该UE，而该UE通过监听RAN寻呼，就能监听到网络设备的寻呼，提高了网络设备寻呼到该UE的成功率。网络设备可能不必进行多次RAN寻呼就能找到该UE，且网络设备也不必通知核心网来以CN寻呼方式寻呼该UE，因此节省了寻呼资源。且网络设备由于无需多次寻呼该UE，由此也减少了不相关的UE接收寻呼的次数，减少了对其他UE的影响，使得其他UE能够更好地节能。
下面考虑一个寻呼虚警(false alarm)的问题。现有的寻呼机制存在寻呼虚警的问题，即，UE接收并解码了寻呼消息，但发现网络实际并没有寻呼该UE。
寻呼虚警产生的主要原因是：可能多个UE计算的PO位置都相同，则存在多个UE监听同一PO的情况。当多个UE监听同一PO时，根据现有机制，UE在接收到寻呼DCI时只能获得寻呼消息的调度信息，而不能区分出该寻呼消息是否是针对该UE的寻呼消息。因此UE会继续根据该寻呼DCI监听寻呼消息，只能在接收并解码承载在物理下行共享信道(physical downlink shared channel，PDSCH)上的寻呼消息后，根据寻呼消息中是否包括该UE的标识(例如5G-S-TMSI或I-RNTI)才能确定本次寻呼是否针对该UE。因此，对于实际未被寻呼的UE来说，就存在不必要的PDSCH接收解码过程，产生不必要的功耗。因为涉及到了寻呼DCI，因此简单介绍一下寻呼过程。
寻呼的基本过程是，网络选择一定的寻呼范围，在PO内发送寻呼DCI，寻呼DCI可能包括寻呼消息的调度信息，还可能包括其他一些信息，例如短消息(short message)等，因为其他信息与本申请实施例的方案无关，因此不过多介绍。寻呼范围是网络发送寻呼的区域。该区域由网络决定，例如，针对处于RRC空闲态的UE，网络可将该UE所属的跟踪区(tracking area，TA)作为寻呼范围；针对处于RRC非激活态的UE，网络可将该UE所属的RNA作为寻呼范围。UE从网络接收寻呼DCI后，如果寻呼DCI中包含寻呼消息的调度信息，则UE可根据该调度信息在PDSCH上接收并解码寻呼消息。寻呼消息可包括网络所寻呼的UE的标识，如果该寻呼消息包括该UE的标识，则UE可执行相应操作，而如果该寻呼消息不包括该UE的标识，则UE可忽略该寻呼消息。
现有的寻呼机制存在寻呼虚警问题的另一个原因是，没有针对不同类型的寻呼设计不同的发送机制。从UE角度来说，处于RRC空闲态的UE和处于RRC非激活态的UE可能监听同一个PO；从网络角度来说，一次寻呼可同时包含CN寻呼和RAN寻呼，也可能仅包含CN寻呼或RAN寻呼。然而，UE在接收并解码寻呼消息之前，无法获知本次寻呼的类型，即，不知道本次的寻呼消息包括的UE标识是5G-S-TMSI还是I-RNTI。对于处于RRC非激活态的UE，该UE需要监听CN寻呼和RAN寻呼；而对于RRC空闲态的UE，该UE只需要监听CN寻呼。因此，当某次寻呼仅包含RAN寻呼时，该寻呼消息可能包括若干个UE的I-RNTI，而RRC空闲态的UE没有I-RNTI，也不能响应RAN寻呼，则对于 该UE来说，就存在不必要的寻呼接收过程。
为了解决寻呼虚警的问题，可通过区分CN寻呼与RAN寻呼的机制来寻呼UE。下面提供本申请实施例的第二种寻呼方法。在该方法中，网络是通过区分CN寻呼与RAN寻呼的机制来寻呼UE，UE也可以通过区分CN寻呼与RAN寻呼的机制来监听寻呼。该方法的实现流程可继续参考图3，该方法与图3所示的实施例的区别，是图3所示的实施例中未采用区分CN寻呼与RAN寻呼的机制，而该方法采用了该机制。可理解为，本申请实施例提供图3所示的实施例中的S305的一种替代方式。
同样的，UE可确定第二小区是否属于第一RNA，如果第二小区属于第一RNA，则UE可按照第一配置来监听寻呼，对于这部分内容可参考图3所示的实施例中的S305，例如UE确定寻呼周期等方式，都可参考图3所示的实施例中的S305。
在本申请实施例中，网络可按照区分CN寻呼与RAN寻呼的机制进行寻呼，区分CN寻呼和RAN寻呼的机制是降低处于RRC空闲态的UE产生寻呼虚警的概率的一种方式。这种机制的基本思想是让UE提前知道本次寻呼的类型，以减少RRC空闲态的UE接收RAN寻呼消息的过程。该机制可以有多种实现方式，下面举例介绍。
1、第一种实现方式，指示寻呼类型。
例如，网络设备可发送第一指示信息，UE在驻留到第二小区后可接收来自网络设备的第一指示信息。网络设备在第一指示信息中可指示寻呼类型，寻呼类型例如包括RAN寻呼、CN寻呼、或RAN寻呼和CN寻呼，或者理解为，第一指示信息可指示本次寻呼包括RAN寻呼、或指示本次寻呼包括CN寻呼、或指示本次寻呼包括RAN寻呼和CN寻呼。其中，如果第一指示信息指示本次寻呼包括RAN寻呼消息，也可理解为是指示本次寻呼包括RAN寻呼且不包括CN寻呼；如果第一指示信息指示本次寻呼包括CN寻呼，也可理解为是指示本次寻呼包括CN寻呼且不包括RAN寻呼。第一指示信息可占用一个或多个比特，第一指示信息例如包括在寻呼DCI中，或者包括在唤醒信号中。
在这种情况下，对于处于RRC空闲态的UE来说，在接收第一指示信息后，如果第一指示信息指示本次寻呼包括RAN寻呼且不包括CN寻呼，则该UE本身是无需再继续监听寻呼(即，RAN寻呼)。但是本申请实施例中，该UE由于保留了第一配置，能够识别RAN寻呼，因此该UE依然可以继续监听AN寻呼。例如该UE接收了RAN寻呼消息，可以确定该UE的I-RNTI是否包括在该RAN寻呼消息中。如果该UE的I-RNTI不包括在该RAN寻呼消息中，表明该UE未被寻呼，则UE忽略该RAN寻呼消息；而如果该UE的I-RNTI包括在该RAN寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
在本申请实施例中，UE可监听RAN寻呼且不监听CN寻呼，或者，UE也可以监听RAN寻呼和CN寻呼，理由可参考图3所示的实施例中的S305。
UE在监听寻呼的过程中，例如接收了第一指示信息。如果UE监听RAN寻呼且不监听CN寻呼，那么如果第一指示信息指示本次寻呼包括CN寻呼且不包括RAN寻呼，则该UE无需再继续监听本次寻呼，以节省功耗。而如果第一指示信息指示本次寻呼包括RAN寻呼且不包括CN寻呼，或者指示本次寻呼包括RAN寻呼和CN寻呼，那么UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的I-RNTI包括在该CN寻呼消息中，表明该UE被寻呼，则 UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
如果UE既监听RAN寻呼也监听CN寻呼，则如果第一指示信息指示本次寻呼包括CN寻呼且不包括RAN寻呼，则该UE根据该第一指示信息继续监听本次CN寻呼。例如该UE接收了寻呼消息，可以确定该UE的5G-S-TMSI是否包括在该寻呼消息中。如果该UE的5G-S-TMSI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的5G-S-TMSI包括在该寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
或者，如果UE既监听RAN寻呼也监听CN寻呼，则如果第一指示信息指示本次寻呼包括RAN寻呼且不包括CN寻呼，那么UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的I-RNTI包括在该CN寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
或者，如果UE既监听RAN寻呼也监听CN寻呼，则如果第一指示信息指示本次寻呼包括RAN寻呼和CN寻呼，那么UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的5G-S-TMSI和/或I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI和5G-S-TMSI均不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的5G-S-TMSI和/或I-RNTI包括在该CN寻呼消息中，则表明该UE被寻呼，则UE可执行的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
2、第二种实现方式，指示所寻呼的分组。
例如，网络(接入网设备或核心网设备)将该网络覆盖的多个UE划分为不同的组，在寻呼时对不同的组分别进行寻呼。在将UE分组时，考虑到寻呼虚警的问题，一种分组方式例如为，根据UE所处的RRC状态进行分组。例如，将UE划分为第一类型的群组和第二类型的群组，第一类型的群组包括一个或多个组，这一个或多个组中的组包括一个或多个UE，且第一类型的群组包括的都是处于RRC非激活态的UE；第二类型的群组包括一个或多个组，这一个或多个组中的组包括一个或多个UE，且第二类型的群组包括的都是处于RRC空闲态的UE。网络设备可将各个UE所属的分组的组号发给各个UE，从而UE能够获知该UE所属的分组的组号；或者，UE可根据相应的信息确定该UE所属的组号，例如网络可广播不同RRC状态对应的分组相关参数广播，从而UE根据分组相关参数和/或该UE的标识就能确定该UE所属的分组。
同样的，网络设备可发送第一指示信息，UE在驻留到第二小区后可接收来自网络设备的第一指示信息。不同的是，网络可在第一指示信息中指示本次所寻呼的分组，而不必指示寻呼类型。例如第一指示信息可携带本次所寻呼的分组的组号。UE接收第一指示信息后，如果确定本次所寻呼的分组包括该UE所属的分组，就可以继续监听寻呼，而如果确定本次所寻呼的分组不包括该UE所属的分组，就可以不必监听寻呼。关于第一指示信息的介绍可参考前文。在本申请实施例中，虽然UE处于RRC空闲态，但UE也能确定该UE处于RRC非激活态时所属的分组。且该UE由于保留了第一配置，因此UE能够监听RAN寻呼，也就是说，能够监听原本由处于RRC非激活态的UE所监听的寻呼。因此，UE接收第一指示信息后，如果该第一指示信息所指示的分组是该UE在处于RRC非激活 态时所属的分组，该UE也可以根据该第一指示信息继续监听寻呼。
例如，UE接收的第一指示信息包括第一信息，第一信息可指示第一组，例如第一信息包括第一组的组号，第一组是第一类型的群组。需要注意的是，第一信息可能仅指示第一组而不指示其他分组，或者，第一信息也可以指示多个分组，第一组是第一信息所指示的其中一个分组。在该UE处于RRC非激活态时该UE属于第一组，但该UE当前处于RRC空闲态，所以实际上该UE并不属于第一组。但由于该UE保留了第一配置，且网络设备可能认为该UE还处于RRC非激活态，因此网络设备可能会在用于寻呼第一组的寻呼消息中寻呼该UE，因此该UE可根据第一信息继续监听用于寻呼第一组的寻呼。由于第一组包括的是处于RRC非激活态的UE，因此用于寻呼第一组的寻呼例如为RAN寻呼。例如UE接收了RAN寻呼消息，UE可以确定该UE的I-RNTI是否包括在该RAN寻呼消息中，如果该UE的I-RNTI不包括在该RAN寻呼消息中，表明该UE未被寻呼，则UE忽略该RAN寻呼消息；而如果该UE的I-RNTI包括在该RAN寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
在本申请实施例中，UE可监听RAN寻呼且不监听CN寻呼，或者，也可以监听RAN寻呼和CN寻呼，理由可参考图3所示的实施例中的S305。
UE在监听寻呼的过程中，例如接收了第一指示消息。如果UE监听RAN寻呼且不监听CN寻呼，那么，如果第一指示信息所指示的分组包括该UE在处于RRC空闲态时所属的分组，该UE不必继续监听本次寻呼。例如，UE接收的第一指示信息包括第二信息，第二信息可指示第二组，例如第二信息包括第二组的组号，第二组是该UE在处于RRC空闲态时所属的分组。由于UE不必监听对应于RRC空闲态的寻呼，因此UE可不必监听对应的寻呼。而如果第一指示信息指示的分组包括该UE在处于RRC非激活态时所属的分组，那么UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的I-RNTI包括在该CN寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
或者，如果UE既监听RAN寻呼也监听CN寻呼，那么，如果第一指示信息包括第二信息，该UE也继续监听本次寻呼。例如，UE接收了第二信息，该UE可根据第二信息继续监听用于寻呼第二组的寻呼。由于第二组包括的是处于RRC空闲态的UE，因此用于寻呼第二组的寻呼例如为CN寻呼。例如UE接收了寻呼消息，UE可以确定该UE的5G-S-TMSI是否包括在该寻呼消息中，如果该UE的5G-S-TMSI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的5G-S-TMSI包括在该寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
或者，如果UE既监听RAN寻呼也监听CN寻呼，且第一指示信息包括第一信息，也就是说，第一指示信息指示的分组包括该UE在处于RRC非激活态时所属的分组，则UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的I-RNTI包括在该寻呼消息中，表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连 接态。
或者，如果UE既监听RAN寻呼也监听CN寻呼，且第一指示信息包括第一信息和第二信息，也就是说，第一指示信息指示的分组包括该UE在处于RRC非激活态时所属的分组，以及包括该UE在处于RRC空闲态时所属的分组，则UE可以继续监听本次寻呼。例如该UE接收了寻呼消息，可以确定该UE的5G-S-TMSI和/或I-RNTI是否包括在该寻呼消息中。如果该UE的I-RNTI和5G-S-TMSI均不包括在该寻呼消息中，表明该UE未被寻呼，则UE忽略该寻呼消息；而如果该UE的5G-S-TMSI和/或I-RNTI包括在该CN寻呼消息中，则表明该UE被寻呼，则UE可执行相应的操作，例如，UE在第二小区发起RRC连接建立过程，以进入RRC连接态。
其中，如果处于RRC空闲态的UE由于监听并响应于RAN寻呼而发起了RRC连接建立过程，那么可选的，该UE可在连接建立过程中向网络设备(例如基站)发送指示信息(例如称为第二指示信息)，第二指示信息可指示该UE是处于RRC空闲态的UE，或指示该UE是处于RRC空闲态的UE，且是因为RAN寻呼而发起RRC连接建立过程。因为网络设备是认为寻呼了处于RRC非激活态的UE，但实际上该UE是在处于RRC空闲态的情况下响应的RAN寻呼，因此UE可在连接建立过程中向网络设备发送第二指示信息，有助于网络设备了解该情况，也可以避免网络设备以为是其他UE在发起连接建立过程而按照低优先级处理该UE的连接建立请求。而如果是处于RRC非激活态的UE由于监听并响应于RAN寻呼而发起了RRC连接恢复过程，对此网络设备能够知道是有RRC非激活态的UE在进行连接恢复，那么该UE正常处理即可，不必向网络设备发送第二指示信息。
关于本申请实施例的其他相应的内容(例如其他相应的步骤)等，可参考图3所示的实施例。
在本申请实施例中，UE如果从任意小区驻留状态回到正常驻留状态，即使UE还处于RRC空闲态，也可以监听RAN寻呼。网络设备认为UE处于RRC非激活态，因此网络设备会以RAN寻呼的方式来寻呼该UE，而该UE通过监听RAN寻呼，就能监听到网络设备的寻呼，提高了网络设备寻呼到该UE的成功率。网络设备可能不必进行多次RAN寻呼就能找到该UE，且网络设备也不必通知核心网来以CN寻呼方式寻呼该UE，因此节省了寻呼资源。且网络设备由于无需多次寻呼该UE，由此也减少了不相关的UE接收寻呼的次数，减少了对其他UE的影响，使得其他UE能够更好地节能。而且本申请实施例可通过区分CN寻呼和RAN寻呼的机制来寻呼UE，由此能够减小虚警的概率。
在如上两个实施例中，UE都无需进入RRC非激活态，而是可以在RRC空闲态下监听RAN寻呼。下面请参考图4，介绍本申请实施例提供的第三种寻呼方法，在该方法中，UE可恢复到RRC非激活态，从而在RRC非激活态下正常监听RAN寻呼。
S401、UE驻留在第三小区。其中，UE在第三小区处于正常驻留状态。
第三小区例如是合适的小区，UE在第三小区例如处于RRC非激活态。
S402、UE在小区重选过程中未选择到合适的小区，且选择到可接受的小区。例如可接受的小区为第一小区。
UE驻留在第三小区的过程中，可进行小区重选。例如UE在小区重选的评估过程中未选择到合适的小区，而选择到了可接受的小区。
S403、UE驻留到第一小区，且进入RRC空闲态。其中，UE在第一小区处于任意小区驻留状态。
由于UE并未选择到合适的小区，而是选择到了可接受的小区(第一小区)，则UE驻留到第一小区。UE在可接受的小区上不能处于RRC非激活态，则UE进入RRC空闲态。
但是在本申请实施例中，虽然UE进入了RRC空闲态，但UE可以不必释放至少一项，以及可以保持定时器继续运行，该定时器例如为T380定时器，T380定时器可用于UE更新该UE所属的RNA。在本申请实施例中，至少一项可用于该UE恢复到RRC非激活态。也就是说，UE在从RRC非激活态进入RRC空闲态时，原本是会释放至少一项。但是本申请实施例中，为了使得UE在重新进入正常驻留状态后能够恢复到RRC非激活态，因此可以使得UE在进入RRC空闲态时不释放至少一项。这样，如果该UE又从第一小区进入了合适的小区，重新回到正常驻留状态，那么由于保留了至少一项，该UE就能够恢复到RRC非激活态，从而在RRC非激活态下正常监听寻呼(例如监听RAN寻呼和CN寻呼)。而网络也可能认为该UE处于RRC非激活态，因此网络可能会以RAN寻呼的方式来寻呼该UE，从而该UE对于寻呼的监听方式与网络对该UE的寻呼方式一致，提高了网络通过寻呼找到该UE的成功率。
至少一项例如包括如下一项或多项：第二配置，安全密钥，无线承载，或，无线资源。例如，至少一项包括第二配置；或者，至少一项包括第二配置和无线资源；或者，至少一项包括第二配置、无线承载和无线资源；或者，至少一项包括第二配置、安全密钥、无线承载、以及无线资源。
其中，安全密钥例如包括K gNB、S-K gNB、S-K eNB、K RRCint、K RRCenc、K UPint、或K UPenc等密钥中的一个或多个。无线承载例如包括数据无线承载(data radio bearer，DRB)和/或信令无线承载(signaling radio bearer，SRB)。无线资源例如包括DRB或SRB相应的无线链路控制(radio link control，RLC)实体、媒体接入控制(media access control，MAC)实体、分组数据汇聚协议(packet data convergence protocol，PDCP)实体或服务数据适配协议(service data adaptation protocol，SDAP)实体等一个或多个实体的配置。
第二配置例如包括如下一项或多项：该UE的RRC非激活态接入层上下文(UE inactivity AS context)，挂起配置，传输资源配置，或，无线承载配置。
传输资源配置例如包括时频资源配置或信道配置等。无线承载配置可包括DRB的配置和/或SRB的配置。
作为一种可选的实施方式，UE可以根据定时器的剩余时长确定是否保留至少一项。例如，如果定时器的剩余时长大于或等于第二阈值，则表明定时器剩余的时长较多，UE在这段时间内或许能够重新进入正常驻留状态，从而利用至少一项来恢复到RRC非激活态，因此在这种情况下，UE可以保留至少一项。而如果定时器的剩余时长小于第二阈值，表明定时器剩余的时长已不多，可能不足以使得UE进入正常驻留状态，那么如果该定时器超时，UE本应发起RNAU流程，但UE由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该UE。因此，如果定时器的剩余时长小于第二阈值，该UE就没必要恢复到RRC非激活态，所以在这种情况下，UE可以不必保留至少一项。如果UE未保留至少一项，那么UE如果重新进入正常驻留状态，则UE在RRC空闲态下监听CN寻呼即可。
第二阈值例如由UE自行确定，或者由网络设备配置，或者也可以通过协议规定。
例如第二阈值由网络设备配置，则网络设备可以将第二阈值预配置在该UE中，或者 网络设备可以生成第二阈值，发送第二阈值。例如网络设备可通过单播消息向该UE发送第二阈值，则UE可接收来自网络设备的第二阈值。例如网络设备可在该UE处于RRC连接态时将第二阈值发送给该UE(例如该UE在进入RRC非激活态前处于RRC连接态)，或者网络设备也可以在该UE处于RRC非激活态时通过相应方式将第二阈值发送给该UE。或者，如果网络设备将第二阈值发送给UE，那么网络设备也可以采用广播消息发送第二阈值，则可能有多个UE都能接收第二阈值，该UE是这多个UE中的一个。关于单播消息和广播消息的实现方式，可参考前文对于第一阈值的相关介绍。
其中，第二阈值与前述的实施例所介绍的第一阈值，可以相等，也可以不相等。
如下的各个步骤以UE保留了至少一项为例。
S404、UE从第一小区重选到第二小区。
可选的，在UE保留至少一项后，如果在定时器超时时，UE尚未进入正常驻留状态，例如UE尚未驻留到合适的小区(例如未驻留到第二小区)，那么UE可以释放至少一项。因为如果该定时器超时，UE本应发起RNAU流程，但UE由于处于RRC空闲态而无法发起RNAU流程，则网络设备未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络设备可以通知CN来发起CN寻呼，也就是说，网络可能不再通过RAN寻呼方式来寻呼该UE。因此，如果定时器超时，该UE就没必要再通过恢复RRC非激活态来监听RAN寻呼。所以在这种情况下，UE可以不必再保留至少一项。如果UE未保留非激活态相关配置，那么UE如果重新进入正常驻留状态，则UE在RRC空闲态下监听CN寻呼即可。
关于S404的更多内容，可参考图3所示的实施例中的S304。
S405、UE恢复到RRC非激活态。
可选的，UE可确定第二小区是否属于第一RNA，关于确定方式可参考图3所示的实施例中的S305。如果第二小区属于第一RNA，则由于UE保留了至少一项，则UE可恢复到RRC非激活态。例如对于UE来说，由于该UE保留了至少一项，则UE就认为已恢复到了RRC非激活态。而对于网络来说，本就认为该UE处于RRC非激活态。因此，UE由于未释放至少一项，则在该UE重新进入正常驻留状态时，就可以自行恢复到RRC非激活态。
S406、UE在RRC非激活态下监听寻呼。
UE在RRC非激活态下监听寻呼的方式，就与现有的UE在RRC非激活态下监听寻呼的方式相同。例如，UE可监听RAN寻呼和CN寻呼。如果网络通过前述实施例所提及的区分RAN寻呼和CN寻呼的机制来寻呼UE，则UE也能够按照区分RAN寻呼和CN寻呼的机制来监听寻呼，对此不多赘述。
目前，为了能让UE耗费较低功耗而实现向网络设备发数据，提出了小数据传输(small data transmission，SDT)过程。SDT的一种实现方式为，UE在处于RRC非激活态时，可使用配置的资源向网络设备发送数据，或者UE可通过随机接入(random access，RA)过程向网络设备发送数据。在本申请实施例中，如果UE原本处于RRC非激活态，进入任意小区驻留状态后又重新恢复了RRC非激活态，那么该UE在原本处于RRC非激活态时可以执行SDT过程，和/或，该UE在重新恢复到RRC非激活态后可以执行SDT过程。也就是说，在UE处于RRC非激活态时，该UE可以在有需求的情况下执行SDT过程。例如，UE在恢复到RRC非激活态后，可以在RRC非激活态下监听寻呼(如S406所述)，和/或， 可以在RRC非激活态下执行SDT过程。
S407、在第二小区不属于第一RNA的情况下，UE发起RNAU流程，或，UE释放至少一项。
如果第二小区不属于第一RNA，则UE可先恢复到RRC非激活态，在RRC非激活态下，该UE可尝试发起RNAU流程，以更新该UE的RNA。如果RNAU流程执行成功，则该UE的RNA得到了更新，那么UE可在RRC非激活态下监听寻呼和/或执行SDT过程。而如果RNAU流程执行失败，该UE的RNA无法更新，那么该UE可释放至少一项，继续保持在RRC空闲态。UE在RRC空闲态下可监听CN寻呼等。
或者，如果第二小区不属于第一RNA，则UE也可以不恢复到RRC非激活态，以及不发起RNAU流程，而是直接释放至少一项，保持在RRC空闲态。UE在RRC空闲态下可监听CN寻呼等。由此可以减少UE的工作，简化UE的实现。
在前文介绍了几种UE可能释放至少一项的情况，在UE释放了至少一项的情况下，UE无法再恢复到RRC非激活态发起RNA更新过程。因此，如果在这种情况下定时器处于运行状态，则UE可以停止该定时器。网络未接收该UE发起的RNAU流程，就能获知该UE的状态异常，从而网络可以通过CN寻呼方式来寻呼该UE。该UE如果重新进入正常驻留状态，则UE在RRC空闲态下监听CN寻呼即可。
在本申请实施例中，UE如果从任意小区驻留状态回到正常驻留状态，则可以恢复到RRC非激活态，从而可以正常监听RAN寻呼和/或执行SDT过程。网络设备认为UE处于RRC非激活态，因此网络设备如果需要寻呼该UE，则会以RAN寻呼的方式来寻呼该UE，而该UE如果在恢复到RRC非激活态后会监听RAN寻呼，则通过监听RAN寻呼，就能监听到网络设备的寻呼，提高了网络设备寻呼到该UE的成功率。网络设备可能不必进行多次RAN寻呼就能找到该UE，且网络设备也不必通知核心网来以CN寻呼方式寻呼该UE，因此节省了寻呼资源。且网络设备由于无需多次寻呼该UE，由此也减少了不相关的UE接收寻呼的次数，减少了对其他UE的影响，使得其他UE能够更好地节能。而且UE是通过恢复RRC非激活态来正常监听寻呼，无需更改RRC空闲态UE的行为，使得本申请实施例的技术方案能够更好地与现有的技术兼容。而该UE在处于RRC非激活态时还可以执行SDT过程，从而能够在进入RRC连接态之前或者在不必进入RRC连接态的情况下就能向网络设备发送相应的数据，以减少该UE由于进入RRC连接态而消耗的资源，且能够降低UE的功耗。
图5给出了本申请实施例提供的一种通信装置的结构示意图。所述通信装置500可以是图3所示的实施例或图4所示的实施例中的任一个实施例所述的终端设备或该终端设备的电路系统，用于实现上述方法实施例中对应于终端设备的方法。具体的功能可以参见上述方法实施例中的说明。其中，例如一种电路系统为芯片系统。
通信装置500包括一个或多个处理器501。处理器501也可以称为处理单元，可以实现一定的控制功能。所述处理器501可以是通用处理器或者专用处理器等。例如，包括：基带处理器，中央处理器等。所述基带处理器可以用于对通信协议以及通信数据进行处理。所述中央处理器可以用于对通信装置500进行控制，执行软件程序和/或处理数据。不同的处理器可以是独立的器件，也可以是设置在一个或多个处理电路中，例如，集成在一个或多个专用集成电路上。
可选的，通信装置500中包括一个或多个存储器502，用以存储指令504，所述指令 504可在所述处理器上被运行，使得通信装置500执行上述方法实施例中描述的方法。可选的，所述存储器502中还可以存储有数据。所述处理器和存储器可以单独设置，也可以集成在一起。
可选的，通信装置500可以包括指令503(有时也可以称为代码或程序)，所述指令503可以在所述处理器上被运行，使得所述通信装置500执行上述实施例中描述的方法。处理器501中可以存储数据。
可选的，通信装置500还可以包括收发器505以及天线506。收发器505可以称为收发单元、收发机、收发电路、收发器，输入输出接口等，用于通过天线506实现通信装置500的收发功能。
可选的，通信装置500还可以包括以下一个或多个部件：无线通信模块，音频模块，外部存储器接口，内部存储器，通用串行总线(universal serial bus，USB)接口，电源管理模块，天线，扬声器，麦克风，输入输出模块，传感器模块，马达，摄像头，或显示屏等等。可以理解，在一些实施例中，通信装置500可以包括更多或更少部件，或者某些部件集成，或者某些部件拆分。这些部件可以是硬件，软件，或者软件和硬件的组合实现。
本申请实施例中描述的处理器501和收发器505可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency identification，RFID)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、或电子设备等上。实现本文描述的通信装置，可以是独立设备(例如，独立的集成电路，手机等)，或者可以是较大设备中的一部分(例如,可嵌入在其他设备内的模块)，具体可以参照前述关于终端设备，以及网络设备的说明，在此不再赘述。
本申请实施例提供了一种终端设备，该终端设备(为描述方便，称为UE)可用于前述各个实施例中。所述终端设备包括用以实现图3所示的实施例或图4所示的实施例中的任一个实施例所述的UE功能的相应的手段(means)、单元和/或电路。例如，终端设备，包括收发模块，用以支持终端设备实现收发功能，和，处理模块，用以支持终端设备对信号进行处理。
图6给出了本申请实施例提供的一种终端设备的结构示意图。
该终端设备600可适用于图1A、图2A～图2C中的任一个附图所示的架构中。为了便于说明，图6仅示出了终端设备600的主要部件。如图6所示，终端设备600包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备600进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏，显示屏，麦克风，键盘等主要用于接收用户输入的数据以及对用户输出数据。
本领域技术人员可以理解，为了便于说明，图6仅示出了一个存储器和处理器。在一些实施例中，终端设备600可以包括多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备600的收发单元610，将具有处理功能的处理器视为终端设备600的处理单元620。如图6所示，终端设备600包括收发单元610和处理单元620。收发单元也可以称为收发器、收发机、收发装置 等。可选的，可以将收发单元610中用于实现接收功能的器件视为接收单元，将收发单元610中用于实现发送功能的器件视为发送单元，即收发单元610包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
本申请实施例还提供了一种网络设备，该网络设备可用于前述各个实施例中。所述网络设备包括用以实现图3所示的实施例或图4所示的实施例中的任一个实施例所述的网络设备的功能的手段(means)、单元和/或电路。例如，网络设备包括收发模块，用以支持终端设备实现收发功能，和，处理模块，用以支持网络设备对信号进行处理。
图7给出了本申请实施例提供的一种网络设备的结构示意图。如图7所示，网络设备可适用于图1A、图2A～图2C中的任一个附图所示的架构中。该网络设备包括：基带装置701，射频装置702、天线703。在上行方向上，射频装置702通过天线703接收终端设备发送的信息，将终端设备发送的信息发送给基带装置701进行处理。在下行方向上，基带装置701对终端设备的信息进行处理，并发送给射频装置702，射频装置702对终端设备的信息进行处理后经过天线703发送给终端设备。
基带装置701包括一个或多个处理单元7011，存储单元7012和接口7013。其中处理单元7011用于支持网络设备执行上述方法实施例中网络设备的功能。存储单元7012用于存储软件程序和/或数据。接口7013用于与射频装置702交互信息，该接口包括接口电路，用于信息的输入和输出。在一种实现中，所述处理单元为集成电路，例如一个或多个ASIC，或，一个或多个数字信号处理器(digital signal processor，DSP)，或，一个或者多个现场可编程逻辑门阵列(field programmable gate array，FPGA)，或者这些类集成电路的组合。存储单元7012与处理单元7011可以位于同一个电路中，即片内存储元件。或者存储单元7012也可以与处理单元7011处于不同电路上，即片外存储元件。所述存储单元7012可以是一个存储器，也可以是多个存储器或存储元件的统称。
网络设备可以通过一个或多个处理单元调度程序的形式实现上述方法实施例中的部分或全部步骤。例如实现图3所示的实施例或图4所示的实施例中的任一个实施例所述的网络设备的相应的功能。所述一个或多个处理单元可以支持同一种制式的无线接入技术，也可以支持不同种制式的无线接入制式。
在本申请所提供的几个实施例以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的计算机可读存储介质，可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (55)

  1. 一种寻呼方法，应用于终端设备，其特征在于，所述方法包括：
    从第一小区重选或选择到第二小区，其中，所述终端设备在所述第一小区为任意小区驻留状态，所述终端设备在所述第二小区为正常驻留状态；
    监听无线接入网RAN寻呼。
  2. 根据权利要求1所述的方法，其特征在于，监听RAN寻呼，包括：
    在所述第二小区属于第一基于RAN的通知区域RNA的情况下，监听所述RAN寻呼，所述第一RNA为所述终端设备进入所述任意小区驻留状态前所属的RNA。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    在处于无线资源控制RRC非激活态的情况下，驻留到所述第一小区，且进入RRC空闲态，所述第一小区为可接受的小区；
    保留第一配置，和/或，保留至少一项，所述至少一项包括第二配置、安全密钥、无线承载、或无线资源中的一项或多项，所述第一配置用于所述终端设备监听所述RAN寻呼，所述至少一项用于所述终端设备恢复到RRC非激活态。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    维持定时器继续运行，所述定时器用于所述终端设备更新RNA。
  5. 根据权利要求3或4所述的方法，其特征在于，保留第一配置，包括：
    如果所述定时器的剩余时长大于或等于第一阈值，保留所述第一配置。
  6. 根据权利要求3～5任一项所述的方法，其特征在于，在保留所述第一配置的情况下，所述方法还包括：
    如果所述定时器超时，释放所述第一配置。
  7. 根据权利要求3～6任一项所述的方法，其特征在于，所述第一配置包括如下一项或多项：
    非激活无线网络临时标识I-RNTI；
    RAN寻呼周期；
    所述第一RNA的信息；或，
    所述定时器的配置。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    确定所述RAN寻呼周期、默认寻呼周期以及所述终端设备的特定寻呼周期中的最小值为监听寻呼的周期。
  9. 根据权利要求1～8任一项所述的方法，其特征在于，所述方法还包括：
    接收所述RAN寻呼；
    如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。
  10. 根据权利要求1～8任一项所述的方法，其特征在于，所述方法还包括：
    接收第一指示信息，所述第一指示信息用于指示本次寻呼包括所述RAN寻呼；
    接收所述RAN寻呼。
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第一指示信息包括在唤醒信 号WUS中，或包括在寻呼下行控制信息DCI中。
  13. 根据权利要求1～8任一项所述的方法，其特征在于，所述方法还包括：
    接收第一信息，所述第一信息用于指示寻呼第一组，所述第一组包括处于RRC非激活态的一个或多个终端设备，且所述终端设备在处于RRC非激活态时属于所述第一组；
    接收所述RAN寻呼。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    如果所述RAN寻呼包括所述终端设备的I-RNTI，发起RRC连接建立过程。
  15. 根据权利要求13或14所述的方法，其特征在于，所述方法还包括：
    接收第二信息，所述第二信息用于指示寻呼第二组，所述第二组包括处于RRC空闲态的一个或多个终端设备，且所述终端设备属于所述第二组；
    接收核心网CN寻呼。
  16. 根据权利要求1～15任一项所述的方法，其特征在于，所述方法还包括：
    如果所述第二小区不属于所述第一RNA，释放第一配置，所述第一配置用于所述终端设备监听所述RAN寻呼。
  17. 根据权利要求1～16任一项所述的方法，其特征在于，所述终端设备处于无线资源控制RRC空闲态。
  18. 根据权利要求3或4所述的方法，其特征在于，保留至少一项，包括：
    如果所述定时器的剩余时长大于或等于第二阈值，保留所述至少一项。
  19. 根据权利要求3、4或18所述的方法，其特征在于，在保留所述至少一项的情况下，所述方法还包括：
    如果所述定时器超时、且所述终端设备未进入所述正常驻留状态，释放所述至少一项。
  20. 根据权利要求3、4、18或19所述的方法，其特征在于，所述第二配置包括如下一项或多项：
    所述终端设备的RRC非激活态接入层上下文；
    挂起配置；
    传输资源配置；或，
    无线承载配置。
  21. 根据权利要求3、4、18、19或20所述的方法，其特征在于，所述方法还包括：
    在选择到所述第二小区后，从所述RRC空闲态恢复为RRC非激活态。
  22. 根据权利要求21所述的方法，其特征在于，监听RAN寻呼，包括：
    在所述RRC非激活态下监听所述RAN寻呼。
  23. 根据权利要求21所述的方法，其特征在于，所述方法还包括：
    如果所述第二小区不属于第一RNA，发起基于RAN的通知区域更新过程。
  24. 根据权利要求23所述的方法，其特征在于，所述方法还包括：
    如果所述基于RAN的通知区域更新过程失败，释放所述至少一项。
  25. 根据权利要求23所述的方法，其特征在于，监听RAN寻呼，包括：
    如果基于RAN的通知区域更新过程成功，在所述RRC非激活态下监听所述RAN寻呼。
  26. 根据权利要求3、4、18、19或20所述的方法，其特征在于，所述方法还包括：
    如果所述第二小区不属于第一RNA，释放所述至少一项。
  27. 一种通信装置，其特征在于，包括：
    处理单元，用于从第一小区重选或选择到第二小区，其中，所述通信装置在所述第一小区为任意小区驻留状态，所述通信装置在所述第二小区为正常驻留状态；
    收发单元，用于监听无线接入网RAN寻呼。
  28. 根据权利要求27所述的通信装置，其特征在于，所述收发单元用于通过如下方式监听RAN寻呼：
    在所述第二小区属于第一基于RAN的通知区域RNA的情况下，监听所述RAN寻呼，所述第一RNA为所述通信装置进入所述任意小区驻留状态前所属的RNA。
  29. 根据权利要求27或28所述的通信装置，其特征在于，所述处理单元还用于：
    在处于无线资源控制RRC非激活态的情况下，驻留到所述第一小区，且进入RRC空闲态，所述第一小区为可接受的小区；
    保留第一配置，和/或，保留至少一项，所述至少一项包括第二配置、安全密钥、无线承载、或无线资源中的一项或多项，所述第一配置用于所述通信装置监听所述RAN寻呼，所述至少一项用于所述通信装置恢复到RRC非激活态。
  30. 根据权利要求29所述的通信装置，其特征在于，所述处理单元，还用于维持定时器继续运行，所述定时器用于所述通信装置更新RNA。
  31. 根据权利要求29或30所述的通信装置，其特征在于，所述处理单元用于通过如下方式保留第一配置：
    如果所述定时器的剩余时长大于或等于第一阈值，保留所述第一配置。
  32. 根据权利要求29～31任一项所述的通信装置，其特征在于，在保留所述第一配置的情况下，所述处理单元，还用于如果所述定时器超时，释放所述第一配置。
  33. 根据权利要求29～32任一项所述的通信装置，其特征在于，所述第一配置包括如下一项或多项：
    非激活无线网络临时标识I-RNTI；
    RAN寻呼周期；
    所述第一RNA的信息；或，
    所述定时器的配置。
  34. 根据权利要求33所述的通信装置，其特征在于，所述处理单元，还用于确定所述RAN寻呼周期、默认寻呼周期以及所述通信装置的特定寻呼周期中的最小值为监听寻呼的周期。
  35. 根据权利要求27～34任一项所述的通信装置，其特征在于，
    所述收发单元，还用于接收所述RAN寻呼；
    所述处理单元，还用于如果所述RAN寻呼包括所述通信装置的I-RNTI，通过所述收发单元发起RRC连接建立过程。
  36. 根据权利要求27～34任一项所述的通信装置，其特征在于，所述收发单元还用于：
    接收第一指示信息，所述第一指示信息用于指示本次寻呼包括所述RAN寻呼；
    接收所述RAN寻呼。
  37. 根据权利要求36所述的通信装置，其特征在于，所述处理单元，还用于
    如果所述RAN寻呼包括所述通信装置的I-RNTI，通过所述收发单元发起RRC连接建立过程。
  38. 根据权利要求36或37所述的通信装置，其特征在于，所述第一指示信息包括在唤醒信号WUS中，或包括在寻呼下行控制信息DCI中。
  39. 根据权利要求27～34任一项所述的通信装置，其特征在于，所述收发单元还用于：
    接收第一信息，所述第一信息用于指示寻呼第一组，所述第一组包括处于RRC非激活态的一个或多个通信装置，且所述通信装置在处于RRC非激活态时属于所述第一组；
    接收所述RAN寻呼。
  40. 根据权利要求39所述的通信装置，其特征在于，所述处理单元，还用于如果所述RAN寻呼包括所述通信装置的I-RNTI，通过所述收发单元发起RRC连接建立过程。
  41. 根据权利要求39或40所述的通信装置，其特征在于，所述收发单元还用于：
    接收第二信息，所述第二信息用于指示寻呼第二组，所述第二组包括处于RRC空闲态的一个或多个通信装置，且所述通信装置属于所述第二组；
    接收核心网CN寻呼。
  42. 根据权利要求27～41任一项所述的通信装置，其特征在于，所述处理单元，还用于如果所述第二小区不属于所述第一RNA，释放第一配置，所述第一配置用于所述通信装置监听所述RAN寻呼。
  43. 根据权利要求27～42任一项所述的通信装置，其特征在于，所述通信装置处于无线资源控制RRC空闲态。
  44. 根据权利要求29或30所述的通信装置，其特征在于，所述处理单元用于通过如下方式保留至少一项：
    如果所述定时器的剩余时长大于或等于第二阈值，保留所述至少一项。
  45. 根据权利要求29、30或44所述的通信装置，其特征在于，在保留所述至少一项的情况下，所述处理单元，还用于如果所述定时器超时、且所述通信装置未进入所述正常驻留状态，释放所述至少一项。
  46. 根据权利要求29、30、44或45所述的通信装置，其特征在于，所述第二配置包括如下一项或多项：
    所述通信装置的RRC非激活态接入层上下文；
    挂起配置；
    传输资源配置；或，
    无线承载配置。
  47. 根据权利要求29、30、44、45或46所述的通信装置，其特征在于，所述处理单元，还用于在选择到所述第二小区后，从所述RRC空闲态恢复为RRC非激活态。
  48. 根据权利要求47所述的通信装置，其特征在于，所述收发单元用于通过如下方式监听RAN寻呼：
    在所述RRC非激活态下监听所述RAN寻呼。
  49. 根据权利要求47所述的通信装置，其特征在于，所述处理单元，还用于如果所述第二小区不属于第一RNA，通过所述收发单元发起基于RAN的通知区域更新过程。
  50. 根据权利要求49所述的通信装置，其特征在于，所述处理单元，还用于如果所述基于RAN的通知区域更新过程失败，释放所述至少一项。
  51. 根据权利要求49所述的通信装置，其特征在于，所述收发单元用于通过如下方式监听RAN寻呼：
    如果基于RAN的通知区域更新过程成功，在所述RRC非激活态下监听所述RAN寻呼。
  52. 根据权利要求29、30、44、45或46所述的通信装置，其特征在于，所述处理单元，还用于如果所述第二小区不属于第一RNA，释放所述至少一项。
  53. 一种通信装置，其特征在于，包括处理器和存储器；所述存储器用于存储一个或多个计算机程序，所述一个或多个计算机程序包括计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述一个或多个计算机程序，以使得所述通信装置执行如权利要求1～26中任一项所述的方法。
  54. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1～26中任一项所述的方法。
  55. 一种电路系统，其特征在于，所述电路系统包括：
    处理器和接口，所述处理器用于从所述接口调用并运行指令，当所述处理器执行所述指令时，实现如权利要求1～26中任一项所述的方法。
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