CN117480819A

CN117480819A - Communication method and communication device

Info

Publication number: CN117480819A
Application number: CN202180099119.7A
Authority: CN
Inventors: 范江胜
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2024-01-30
Also published as: WO2023050046A1

Abstract

The communication method and the communication device are provided, the method is applied to terminal equipment, the terminal equipment is configured with first information, and the first information indicates whether at least one independent non-public network SNPN identifier supports a public warning system PWS function or not; the method comprises the following steps: the terminal equipment receives second information sent by the network equipment, wherein the second information comprises M SNPN identifiers, and M is a positive integer; and the terminal equipment selects a target SNPN identifier at least according to the first information and the second information. In the embodiment of the application, the terminal equipment can timely receive the PWS message.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communication technologies, and more particularly, to a communication method and a communication device.

Background

With the development of communication technology, some communication networks, for example: a Non-public network (NPN) function is introduced into the public warning system (public warning system, PWS) for providing various warning messages for the terminal device. However, it is currently unclear how such communication networks communicate after the introduction of PWS functionality.

Disclosure of Invention

The application provides a communication method and a communication device, which can enable terminal equipment to timely receive PWS messages.

In a first aspect, a communication method is provided, where the method is applied to a terminal device, where the terminal device is configured with first information, where the first information indicates whether at least one independent non-public network SNPN identifier supports a public warning system PWS function; the method comprises the following steps: the terminal equipment receives second information sent by the network equipment, wherein the second information comprises M SNPN identifiers, and M is a positive integer; and the terminal equipment selects a target SNPN identifier at least according to the first information and the second information.

In a second aspect, a communication method is provided, including: the network equipment sends second information to the terminal equipment, wherein the second information comprises M independent non-public network SNPN identifiers, and M is a positive integer; the terminal equipment is configured with first information, and the first information indicates whether at least one SNPN identifier supports a Public Warning System (PWS) function.

In a third aspect, a communication apparatus is provided, the apparatus being configured with first information indicating whether at least one independent non-public network, SNPN, identity supports a public warning system, PWS, function; the device comprises: the receiving unit is used for receiving second information sent by the network equipment, wherein the second information comprises M SNPN identifiers, and M is a positive integer; and the selection unit is used for selecting a target SNPN identifier according to the first information and the second information.

In a fourth aspect, there is provided a communication apparatus comprising: a sending unit, configured to send second information to a terminal device, where the second information includes M independent non-public network SNPN identifiers, and M is a positive integer; the terminal equipment is configured with first information, and the first information indicates whether at least one SNPN identifier supports a Public Warning System (PWS) function.

In a fifth aspect, there is provided a communication device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method according to the first aspect.

In a sixth aspect, there is provided a communication device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of the second aspect.

In a seventh aspect, a communication device is provided, comprising a processor for calling a program from a memory to perform the method of the first aspect.

In an eighth aspect, there is provided a communication device comprising a processor for calling a program from a memory to perform the method of the second aspect.

In a ninth aspect, there is provided a chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of the first aspect.

In a tenth aspect, there is provided a chip comprising a processor for calling a program from a memory, so that a device on which the chip is mounted performs the method of the second aspect.

In an eleventh aspect, there is provided a computer-readable storage medium having stored thereon a program that causes a computer to execute the method of the first aspect.

In a twelfth aspect, there is provided a computer-readable storage medium having stored thereon a program that causes a computer to execute the method of the second aspect.

In a thirteenth aspect, there is provided a computer program product comprising a program for causing a computer to perform the method of the first aspect.

In a fourteenth aspect, there is provided a computer program product comprising a program for causing a computer to perform the method of the second aspect.

In a fifteenth aspect, there is provided a computer program for causing a computer to perform the method of the first aspect.

In a sixteenth aspect, there is provided a computer program for causing a computer to perform the method of the second aspect.

In this embodiment of the present application, the terminal device is configured with first information, where the first information indicates whether at least one independent non-public network SNPN identifier supports a public warning system PWS function, and the terminal device selects a target SNPN identifier according to at least the first information and the second information, and may preferably select to register on an SNPN network supporting the PWS function, so as to help the terminal device receive the PWS message in time.

Drawings

Fig. 1 is an exemplary diagram of a wireless communication system to which embodiments of the present application apply.

Fig. 2 is a schematic flow chart of a communication method provided in one embodiment of the present application.

Fig. 3 is a schematic structural diagram of a communication device provided in one embodiment of the present application.

Fig. 4 is a schematic structural diagram of a communication device according to another embodiment of the present application.

Fig. 5 is a schematic structural view of an apparatus provided in an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a wireless communication system 100 to which embodiments of the present application apply. The wireless communication system 100 may include a network device 110 and a User Equipment (UE) 120. Network device 110 may communicate with UE 120. Network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs 120 located within that coverage area. UE120 may access a network (e.g., a wireless network) through network device 110.

Fig. 1 illustrates one network device and two UEs by way of example, and the wireless communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present application. Optionally, the wireless communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the technical solution of the embodiments of the present application may be applied to various communication systems, for example: fifth generation (5th generation,5G) systems or New Radio (NR), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), and the like. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system, a satellite communication system and the like.

The UE in the embodiments of the present application may also be referred to as a Terminal device, an access Terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a Mobile Terminal (MT), a remote station, a remote Terminal, a mobile device, a user Terminal, a wireless communication device, a user agent, or a user equipment. The UE in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, and may be used to connect people, things, and machines, for example, a handheld device with a wireless connection function, an in-vehicle device, and so on. The UE in the embodiments of the present application may be a mobile phone (mobile phone), a tablet (Pad), a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. Alternatively, the UE may be used to act as a base station. For example, the UEs may act as scheduling entities that provide side-uplink signals between UEs in V2X or D2D, etc. For example, a cellular telephone and a car communicate with each other using side-link signals. Communication between the cellular telephone and the smart home device is accomplished without relaying communication signals through the base station.

The network device in the embodiments of the present application may be a device for communicating with the UE, which may also be referred to as an access network device or a radio access network device, e.g. the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (radio access network, RAN) node (or device) that accesses the UE to the wireless network. The base station may broadly cover or replace various names in the following, such as: a node B (NodeB), an evolved NodeB (eNB), a next generation NodeB (gNB), a relay station, an access point, a transmission point (transmitting and receiving point, TRP), a transmission point (transmitting point, TP), a master MeNB, a secondary SeNB, a multi-mode wireless (MSR) node, a home base station, a network controller, an access node, a wireless node, an Access Point (AP), a transmission node, a transceiving node, a baseband unit (BBU), a remote radio unit (Remote Radio Unit, RRU), an active antenna unit (active antenna unit, AAU), a radio head (remote radio head, RRH), a Central Unit (CU), a Distributed Unit (DU), a positioning node, and the like. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.

In some embodiments, the network device may be fixed or mobile. For example, a helicopter or drone may be configured to act as a mobile network device, one or more cells may be moved according to the location of the mobile network device. In other examples, a helicopter or drone may be configured to function as a device to communicate with another network device. In some embodiments, a network device may refer to a CU or a DU, or the network device may include a CU and a DU, or the network device may also include an AAU. It should be appreciated that the network device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The network device and the scene in the embodiment of the application are not limited in the embodiment of the application.

It should also be understood that all or part of the functions of the network device and UE in this application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g., a cloud platform).

In some communication systems, non-public networks (NPN) are introduced, so as to increase flexibility of NPN network deployment, NPN networks may be further divided into independent non-public networks (SNPN) and closed access group (closed access group, CAG) networks, where the former identifies an SNPN network through public land mobile network identification (public land mobile network identifier, PLMN ID) +network identification (network identifier, NID), and the latter identifies a CAG network through PLMN id+cag ID.

A public land mobile network (public land mobile network, PLMN) can support any network sharing combination mode of common public network, SNPN network and CAG network at the same time. For example, one PLMN may support a common public network or an SNPN or CAG network alone, or may support that a common public network and an SNPN share one PLMN, and even that a common public network, an SNPN, and a CAG network are simultaneously associated with one PLMN is allowed. The logical deployment relationships among the common public network, the SNPN and the CAG network can be as shown in Table 1:

table 1 network identification configuration schematic for a cell to support

The parameters i, j and k in table 1 are positive integers greater than or equal to 1. As shown in table 1, from the network configuration point of view, one cell may configure public network PLMN ID list information and non-public network NPN network identification list information at the same time, wherein the non-public network NPN network identification list information is an optional parameter (or, alternatively, is an optional configuration). For CAG type NPN networks, allowing one PLMN ID to associate with one CAG ID list; for an NPN network of the SNPN type, one PLMN ID is allowed to be associated with one NID list.

The public warning system (public warning system, PWS) is mainly used for providing various types of warning messages, such as earthquake tsunami warning messages or commercial warning messages, for terminal equipment. The terminal device can judge whether the network device is ready to send the PWS message or not by receiving the PWS indication bit contained in the paging short message sent by the network device; for public land mobile network PLMN, the network device defaults to support the sending of PWS messages, and the terminal device judges whether to need to receive PWS related messages according to the PWS supporting capability information of the terminal device.

Currently, the SNPN network starts to support the PWS messaging service, but in the prior art, the terminal device only selects the SNPN network according to the network identifier priority, and does not consider whether the selected SNPN network supports the PWS function (i.e. the PWS messaging service), which may cause the terminal device to select an SNPN network that does not support the PWS function, thereby causing serious consequences caused by the terminal device missing the hazard warning message.

In order to solve the above technical problems, embodiments of the present application are described in detail below with reference to fig. 2 to 5.

Fig. 2 is a schematic flow chart of a communication method according to an embodiment of the present application. It should be understood that fig. 2 illustrates steps or operations of a communication method, but these steps or operations are merely examples, and embodiments of the present application may perform other operations or variations of the operations in fig. 2, or not all steps need to be performed, or the steps may be performed in other orders. The method 200 shown in fig. 2 may include steps S210 and S220, which are specifically as follows:

and S210, the network equipment sends second information to the terminal equipment.

The second information may indicate M SNPN identifiers, where M is a positive integer. The terminal device receives, for example, the second information sent by the access network device via a system broadcast message or a dedicated signaling.

The terminal device may be configured with first information. The first information may indicate whether the at least one independent non-public network SNPN identification supports a PWS function, which may include reception and/or transmission of a PWS message, etc.

Alternatively, the first information may be statically configured or dynamically configured. For example, the first information may be specified by protocol default or network device configuration, wherein the network device configuration comprises a core network device configuration or an access network device configuration.

In some embodiments, the terminal device may be configured with third information, where the third information includes N SNPN identities, where N is a positive integer. Optionally, the third information may be configured for NAS network identification of the terminal device, and preconfigured to the terminal device.

For example, the following table 2 shows an example of the third information configured for the terminal device, specifically as follows:

table 2 third information example of terminal device configuration

NAS network identification configuration 1: network identification list 1
NAS network identification configuration 2: network identification list 2
…
NAS network identification configuration K: network identification list K

As shown in table 2, the third information of the terminal device configuration includes K NAS network identifier configurations, where one NAS network identifier configuration includes a set of network identifiers (i.e., a network identifier list), the K NAS network identifier configurations collectively include N SNPN identifiers, priorities of network identifiers between one or more network identifiers included in each NAS network identifier configuration are the same, priorities of network identifiers between network identifiers included in different NAS network identifier configurations may be the same or different, and priorities of network identifiers corresponding to network identifiers included in each NAS network identifier configuration are configured by default through a protocol or configured by a network device.

The following describes the configuration manner of the first information through the following examples, which specifically includes:

mode one: protocol default configuration

The communication standard protocol may specify which SNPN networks support PWS functionality by default or not, such as: the standard protocol specifies that the network corresponding to the SNPN1 and the SNPN2 support the PWS function by default, and if the terminal device acquires the second information and/or the third information includes the SNPN1 or the SNPN2, the terminal device can acquire the first information without additional information, because the SNPN1 or the SNPN2 identifier itself includes the first information, that is, the SNPN1 or the SNPN2 network supports the PWS function by default.

Mode two: network identification priority

The network device sends the first information to the terminal device, where the first information is used to indicate that at least one SNPN identifier in the N SNPN identifiers included in the third information supports (or does not support) a PWS function. For example, the network device may send the first information to the terminal device through a NAS message, and the network device may be a core network device, that is: at this time, the first information is configured according to the granularity of the network identifier, and each SNPN identifier in the N SNPN identifiers contained in the third information is covered.

In some embodiments, the first information may indicate that each of the N SNPN identities included in the third information in table 2 supports (or does not support) a PWS function, that is: at this time, the first information is configured according to the granularity of the network identifier, and covers a part of the SNPN identifier contained in the third information.

In some embodiments, the first information may indicate that a part of the N SNPN identities included in the third information in table 2 supports (or does not support) a PWS function.

In some embodiments, according to the example of table 2, the N SNPN identifications included in the third information may be divided into K groups of SNPN identifications, where K is a positive integer. At this time, the first information may indicate whether each group or a partial group of the K groups of SNPN identifications supports a PWS function, that is: at this time, the first information is configured according to the NAS network identifier configuration granularity in table 2, and covers all or part of network identifiers corresponding to the NAS network identifier configuration group included in the third information.

For example, table 3 below configures one example of a logical relationship between the first information and the third information, specifically as follows:

TABLE 3 example logical relationship between first information and third information configuration

As shown in table 3, the third information configuration of the terminal device includes K network identifier lists (i.e., K groups of network identifiers), where each network identifier list corresponds to indication information, where the indication information is used to indicate whether all network identifiers included in the group of network identifier lists support the PWS function.

In one implementation, the network identifier list 1 in table 3 may contain 3 network identifiers, and the indication information corresponding to the network identifier list 1 may include 3 bits, where the 3 bits may respectively indicate whether the 3 network identifiers contained in the network identifier list 1 support the PWS function.

In another implementation, the indication information corresponding to the network identifier list 1 may include 1 bit, where the 1 bit may indicate that 3 network identifiers included in the network identifier list 1 support (or not support) the PWS function at the same time.

Mode three:

the network device sends the first information to the terminal device, where the first information is used to indicate that at least one SNPN identifier in M SNPN identifiers contained in the second information supports (or does not support) a PWS function.

In some embodiments, the first information may be indication information of network identifier granularity, which is used to indicate whether each of M SNPN identifiers included in the second information supports a PWS function, that is: at this time, the first information is configured according to the granularity of the network identifier, and covers each of the M SNPN identifiers contained in the second information.

In some embodiments, the first information may be indication information of cell granularity, which is used to indicate whether the first cell where the terminal device is currently located supports a PWS function. For example, the first information may indicate whether all SNPN identities broadcasted by the first cell where the terminal device is currently located support the PWS function, i.e.: at this time, the first information is configured according to the granularity of the cell, and all SNPN identifiers contained in the second information are covered.

For example, if the first information may indicate that the first cell where the terminal device is currently located supports a PWS function, at least one SNPN network of the M SNPN identifiers included in the second information supports a PWS function; or if the first information can indicate that the first cell where the terminal equipment is currently located does not support the PWS function, none of the M SNPN networks contained in the second information supports the PWS function.

It should be noted that the above embodiments are merely examples, and the first information may be configured in other manners, which is not limited in the embodiments of the present application.

In some embodiments, the network device may send the second information to the terminal device via a system broadcast message. Accordingly, an Access Stratum (AS) of the terminal device may receive the second information sent by the network device.

Further, the access layer may further transmit the second information to a non-access stratum (NAS) of the terminal device through an inter-layer interaction message (e.g., a second inter-layer interaction message), where the non-access stratum selects the target SNPN identifier according to the first information and the second information, or the non-access stratum selects the target SNPN identifier according to the first information, the second information and the third information.

Alternatively, the first information and the second information may be carried in the same message, for example, the network device may send the first information and the second information to the terminal device through a system broadcast message.

Further, the network device may send the first information and the second information to the terminal device through a system broadcast message. Accordingly, the access layer of the terminal device may receive the first information and the second information sent by the network device, and transfer the first information and the second information to a non-access layer of the terminal device through an inter-layer interaction message (e.g., a third inter-layer interaction message).

S220, the terminal equipment selects a target SNPN identifier according to the first information and the second information or selects the target SNPN identifier according to the first information, the second information and the third information.

In this embodiment of the present application, the terminal device may select the target SNPN identifier according to the following methods, which are specifically as follows:

the method comprises the following steps: the terminal device may prioritize the priority of the network identifier, and select the target SNPN identifier from the multiple SNPN network identifiers by combining with whether to support the PWS function when the same network identifier priority corresponds to the multiple SNPN network identifiers.

In some embodiments, the terminal device may determine a first set of SNPN identifiers corresponding to a first priority among the M SNPN identifiers, and select the target SNPN identifier from the first set of SNPN identifiers according to the first information.

Optionally, when the target SNPN identifier is selected from the first SNPN identifier set, the terminal device may determine, according to the first information, whether there is a SNPN identifier supporting a PWS function in the first SNPN identifier set; if the SNPN identifier supporting the PWS function exists in the first SNPN identifier set, the terminal equipment can select the SNPN identifier supporting the PWS function as the target SNPN identifier; if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, the terminal device can select the target SNPN identifier from the M SNPN identifiers according to the network identifier priority.

For example, the terminal device may first select one or more SNPN identifiers with highest network identifier priority from the M SNPN identifiers, that is, a first SNPN identifier set; then, determining whether SNPN identifiers supporting a PWS function exist in the first SNPN identifier set according to the first information; if the SNPN identifier supporting the PWS function exists in the first SNPN identifier set, the terminal equipment can select the SNPN identifier supporting the PWS function as the target SNPN identifier; if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, the terminal equipment can select the SNPN identifier with the highest network identifier priority from the M SNPN identifiers as the target SNPN identifier.

In some embodiments, the terminal device may determine a first set of SNPN identifiers corresponding to a first priority among the M SNPN identifiers, and select the target SNPN identifier from the first set of SNPN identifiers according to the first information. If the SNPN identifier supporting the PWS function exists in the first SNPN identifier set, the terminal equipment can select the SNPN identifier supporting the PWS function as the target SNPN identifier; if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, the terminal equipment determines a second SNPN identifier set of a second priority in the M SNPN identifiers, and selects the target SNPN identifier from the second SNPN identifier set according to the first information.

If none of the SNPN identifiers in the second SNPN identifier set supports the PWS function, the terminal device may determine a third SNPN identifier set with a third priority among the M SNPN identifiers, select the target SNPN identifier from the third SNPN identifier set according to the first information, and so on until an SNPN network supporting the PWS function is selected, or after traversing the M network identifiers, one SNPN network supporting the PWS function still cannot be selected, the terminal device may forgo selecting the SNPN network supporting the PWS function, and at this time, the terminal device may select the SNPN network only by considering the network identifier priority, that is, may select, from the M SNPN identifiers, the SNPN identifier with the highest network identifier priority as the target SNPN identifier.

For example, the terminal device may first select one or more SNPN identifiers with highest network identifier priority from the M SNPN identifiers, that is, a first SNPN identifier set; then, determining whether SNPN identifiers supporting a PWS function exist in the first SNPN identifier set according to the first information; if the SNPN identifier supporting the PWS function exists in the first SNPN identifier set, the terminal equipment can select the SNPN identifier supporting the PWS function as the target SNPN identifier; if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, the terminal equipment can select a second SNPN identifier set with a second highest network identifier priority from the M SNPN identifiers, and select the target SNPN identifier from the second SNPN identifier set according to the first information.

If none of the SNPN identifiers in the second SNPN identifier set supports the PWS function, the terminal device may select a third SNPN identifier set with a third highest network identifier priority from the M SNPN identifiers, select the target SNPN identifier from the third SNPN identifier set according to the first information, and so on until an SNPN network supporting the PWS function is selected, or after traversing the M network identifiers, one SNPN network supporting the PWS function still cannot be selected, and then the terminal device may select an SNPN identifier with a highest network identifier priority from the M SNPN identifiers as the target SNPN identifier.

The second method is as follows: the terminal device may prioritize supporting the PWS function, and select, when there are multiple SNPN identities supporting the PWS function, the SNPN identity supporting the PWS function from the multiple SNPN identities in combination with the network identity priority as the target SNPN identity.

In some embodiments, the terminal device may determine, according to the first information, a SNPN identifier supporting a PWS function from the M SNPN identifiers as a fourth SNPN identifier set; if SNPN identifiers supporting a PWS function exist in the M SNPN identifiers, the terminal equipment selects the SNPN identifier with the highest priority in the fourth SNPN identifier set as the target SNPN identifier; if none of the SNPN identifiers in the fourth SNPN identifier set supports the PWS function, the terminal device can select the target SNPN identifier from the M SNPN identifiers according to the network identifier priority.

For example, the terminal device may preferentially select a SNPN identifier supporting the PWS function from the M SNPN identifiers, and if there are multiple SNPN identifiers supporting the PWS function, may further select the SNPN identifier with the highest network identifier priority as the target SNPN identifier; and if none of the M SNPN identifications supports the PWS function, the terminal equipment can select the target SNPN identification from the M SNPN identifications according to the network identification priority.

In some embodiments, the terminal device may be configured with fourth information indicating that the terminal device preferentially selects an SNPN identification supporting a PWS function. For example, the fourth information may be configured by a pre-configuration procedure or by a network device configuration procedure, wherein the network device configuration procedure comprises a system broadcast message configuration mode or a dedicated signaling configuration mode.

Correspondingly, the terminal device may select the target SNPN identifier according to the first information, the second information and the fourth information, or the terminal device may select the target SNPN identifier according to the first information, the second information, the third information and the fourth information.

In some embodiments, the terminal device selects the target SNPN identifier according to the above methods only when the fourth information indicates that the SNPN identifier supporting the PWS function is preferentially selected; otherwise, the terminal device only considers the network identification priority corresponding to each network identification when selecting the network identification.

In some embodiments, when the first information may indicate that the first cell in which the terminal device is currently located does not support the PWS function, the terminal device may further select the target SNPN identifier according to the following schemes, specifically as follows:

Scheme one:

in some embodiments, the terminal device may select the target SNPN identifier from the candidate SNPN identifier set, where the candidate SNPN identifier set may include the SNPN identifiers after M SNPN identifiers included in the second information are excluded from the N SNPN identifiers included in the third information.

Optionally, the NAS layer of the terminal device may exclude all network identifiers (i.e., M SNPN identifiers included in the second information) transferred by the AS layer of the terminal device, and select the target SNPN identifier according to a network identifier priority in remaining network identifier configuration information (i.e., the candidate SNPN identifiers) of the NAS layer of the terminal device.

For example: the NAS network identifier configuration of the terminal device includes network identifiers PLMN1, PLMN2 and PLMN3 (i.e. the N SNPN identifiers), where the network identifiers supported by the cell 1 (i.e. the first cell) are PLMN1, PLMN2 and PLMN4 (i.e. the M SNPN identifiers) and the PWS function indication information (i.e. the first information) indicates that the current cell does not support the PWS function, then the NAS layer of the terminal device may exclude PLMN1 and PLMN2 in the NAS network identifier configuration, that is, at this time, the terminal device can only select the network identifier PLMN3 to perform network registration attempt.

Scheme II:

in some embodiments, the terminal device may re-search for the second cell; and selecting the target SNPN identity from a set of SNPN identities provided by the second cell.

Optionally, the non-access layer of the terminal device may send first indication information to the access layer of the terminal device through a first interlayer interaction message, where the first indication information may be used to instruct the access layer to re-search for a cell; in response to the first indication information, the access layer may search for the second cell. That is, the NAS layer of the terminal device may inform the AS layer of the terminal device to re-search for a cell through an inter-layer interaction message.

Further, the NAS layer may further send second indication information to the AS layer, where the second indication information includes at least one of the following:

indication information for prohibiting cell search by using a physical cell identifier (physical cell identity, PCI) corresponding to the cell searched last time;

forbidden duration configuration information for forbidding cell search by using the cell corresponding PCI searched last time;

the indication information of the cell searching is forbidden to be carried out by using the corresponding frequency point of the cell searched last time;

Forbidden duration configuration information for forbidding cell search by using the corresponding frequency point of the cell searched last time;

indication information camping on the same cell as the cell corresponding tracking area identity (tracking area code, TAC) that was last searched is prohibited.

That is, the NAS layer of the terminal apparatus may also provide re-search assistance information (second indication information) to the AS layer of the terminal apparatus so that the terminal apparatus re-searches for the second cell.

In one implementation, the first indication information and the second indication information may be transmitted in the same message or transmitted through different messages, which is not limited in this application.

In another implementation manner, the first indication information may not appear, where the meaning of the first indication information is implicitly contained by the second indication information, so that only the access layer of the terminal device needs to provide the second indication information to know that the non-access layer of the terminal device is requesting to re-search the cell, which is not limited in this application.

In some embodiments, the terminal device selects the target SNPN identifier according to the above method only when the fourth information indicates that the SNPN identifier supporting the PWS function is preferentially selected; otherwise, the terminal device only considers the network identifier priority corresponding to each identifier when selecting the network identifier.

In this embodiment of the present application, the terminal device selects the target SNPN identifier according to the first information and the second information, or the terminal device selects the target SNPN identifier according to the first information, the second information, and the third information, so that the terminal device may preferentially select to register on an SNPN network supporting the PWS function, thereby being helpful for the terminal device to receive the PWS message in time.

The method embodiments of the present application are described above in detail with reference to fig. 1 and 2, and the apparatus embodiments of the present application are described below in detail with reference to fig. 3 to 5. It is to be understood that the description of the method embodiments corresponds to the description of the device embodiments, and that parts not described in detail can therefore be seen in the preceding method embodiments.

Fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device 300 in fig. 3 is configured with first information indicating whether the at least one independent non-public network SNPN identification supports the public warning system PWS functionality. As shown in fig. 3, the apparatus 300 includes a receiving unit 310 and a selecting unit 320, which are specifically as follows:

a receiving unit 310, configured to receive second information sent by a network device, where the second information includes M SNPN identifiers, and M is a positive integer;

A selecting unit 320, configured to select a target SNPN identifier at least according to the first information and the second information.

Optionally, the first information is specified by default of a protocol or configured by a network device.

Optionally, the apparatus is configured with third information, where the third information includes N SNPN identities, the first information indicates whether the N SNPN identities support a PWS function, or the first information indicates whether the M SNPN identities support a PWS function, and N is a positive integer.

Optionally, the N SNPN identifiers are divided into K groups of SNPN identifiers, the first information indicates whether each of the K groups of SNPN identifiers supports a PWS function, or the first information indicates whether each of the N SNPN identifiers supports a PWS function, and K is a positive integer.

Optionally, the first information indicates whether each of the M SNPN identities supports a PWS function, or whether a first cell in which the apparatus is currently located supports a PWS function.

Optionally, the first information indicates that each of the M SNPN identifiers corresponding to the first cell where the device is currently located does not support a PWS function, or the first information indicates that the first cell where the device is currently located does not support a PWS function; wherein, the selecting unit 320 is specifically configured to: and selecting a target SNPN identifier according to the first information, the second information and the third information.

Optionally, the selecting unit 320 is specifically configured to: and selecting the target SNPN identifier from the candidate SNPN identifier set, wherein the candidate SNPN identifier set comprises SNPN identifiers after the M SNPN identifiers are excluded from the N SNPN identifiers.

Optionally, the first information indicates that each of the M SNPN identifiers corresponding to the first cell where the apparatus is currently located does not support the PWS function, or the first information indicates that the first cell where the terminal device is currently located does not support the PWS function, and the apparatus 300 further includes a search unit 330 configured to: re-searching the second cell;

wherein the selecting unit 320 is further configured to: and selecting the target SNPN identifier from the SNPN identifier set provided by the second cell.

Optionally, the search unit 330 is specifically configured to: sending first indication information to an access layer of the device through a first interlayer interaction message, wherein the first indication information is used for indicating the access layer of the device to search cells again; and searching the second cell in response to the first indication information.

Optionally, the search unit 330 is further configured to: transmitting second indication information to the access layer, wherein the second indication information comprises at least one of the following: the indication information of the cell searching is forbidden to be carried out by using the physical cell identifier PCI corresponding to the cell searched last time; forbidden duration configuration information for forbidding cell search by using the cell corresponding PCI searched last time; the indication information of the cell searching is forbidden to be carried out by using the corresponding frequency point of the cell searched last time; forbidden duration configuration information for forbidding cell search by using the corresponding frequency point of the cell searched last time; and prohibiting the indication information residing in the same cell as the corresponding tracking area identifier TAC of the cell searched last time.

Optionally, the selecting unit 320 is specifically configured to: determining a first SNPN identifier set corresponding to a first priority in the M SNPN identifiers; and selecting the target SNPN identifier from the first SNPN identifier set according to the first information.

Optionally, the selecting unit 320 is specifically configured to: determining whether SNPN identifiers supporting a PWS function exist in the first SNPN identifier set according to the first information; if the SNPN identification supporting the PWS function exists in the first SNPN identification set, selecting the SNPN identification supporting the PWS function as the target SNPN identification; and if the SNPN identifiers in the first SNPN identifier set do not support the PWS function, selecting the target SNPN identifier from the M SNPN identifiers according to the network identifier priority.

Optionally, the selecting unit 320 is further configured to: if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, determining a second SNPN identifier set of a second priority in the M SNPN identifiers; and selecting the target SNPN identifier from the second SNPN identifier set according to the first information.

Optionally, the selecting unit 320 is specifically configured to: determining SNPN identifiers supporting a PWS function in the M SNPN identifiers as a third SNPN identifier set according to the first information; and if the SNPN identifiers supporting the PWS function exist in the M SNPN identifiers, selecting the SNPN identifier with the highest priority in the third SNPN identifier set as the target SNPN identifier.

Optionally, the apparatus 300 is configured with fourth information, where the fourth information indicates that the apparatus preferentially selects an SNPN identifier supporting a PWS function, and the fourth information is configured to the terminal device through a pre-configuration procedure or the network device configuration procedure; wherein, the selecting unit 320 is specifically configured to: and selecting the target SNPN identification at least according to the first information, the second information and the fourth information.

Optionally, the receiving unit 310 is specifically configured to: receiving the second information sent by the network equipment; transmitting the second information to a non-access layer of the device through a second interlayer interaction message; wherein, the selecting unit 320 is specifically configured to: and selecting the target SNPN identifier according to the first information and the second information, or selecting the target SNPN identifier according to the first information, the second information and the third information.

Optionally, the receiving unit 310 is specifically configured to: and receiving the first information and the second information sent by the network equipment.

Optionally, the receiving unit 310 is specifically configured to: receiving the first information and the second information; transmitting the first information and the second information to a non-access layer of the device through a third interlayer interaction message;

Wherein, the selecting unit 320 is specifically configured to: and selecting the target SNPN identifier according to the first information and the second information, or selecting the target SNPN identifier according to the first information, the second information and the third information.

Optionally, the apparatus 300 further comprises a sending unit 340 for: and sending capability indication information to the network equipment, wherein the capability indication information is used for indicating whether the device supports a PWS function.

Fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus 400 in fig. 4 includes a transmitting unit 410.

A sending unit 410, configured to send second information to a terminal device, where the second information includes M independent non-public network SNPN identifiers, and M is a positive integer;

the terminal equipment is configured with first information, and the first information indicates whether at least one SNPN identifier supports a Public Warning System (PWS) function.

Optionally, the terminal device is configured with third information, where the third information includes N SNPN identifiers, the first information indicates whether the N SNPN identifiers support a PWS function, or the first information indicates whether the M SNPN identifiers support a PWS function, and N is a positive integer.

Optionally, the first information indicates whether each of the M SNPN identities supports a PWS function, or whether a first cell in which the terminal device is currently located supports a PWS function.

Optionally, the sending unit 410 is further configured to: and sending fourth information to the terminal equipment, wherein the fourth information indicates the terminal equipment to preferentially select SNPN identifiers supporting the PWS function, and the fourth information is configured to the terminal equipment through a pre-configuration process or the network equipment configuration process.

Optionally, the sending unit 410 is specifically configured to: and sending the second information to an access layer of the terminal equipment.

Optionally, the sending unit 410 is specifically configured to: and sending the first information and the second information to the terminal equipment.

Optionally, the sending unit 410 is specifically configured to: and sending the first information and the second information to an access layer of the terminal equipment.

Optionally, the apparatus 400 further comprises a receiving unit 420 for: and receiving capability indication information sent by the terminal equipment, wherein the capability indication information is used for indicating whether the terminal equipment supports a PWS function.

Fig. 5 is a schematic structural view of an apparatus provided in an embodiment of the present application. The dashed lines in fig. 5 indicate that the unit or module is optional. The apparatus 600 may be used to implement the methods described in the method embodiments above. The device 600 may be a chip or a communication device.

The apparatus 600 may include one or more processors 610. The processor 610 may support the apparatus 600 to implement the methods described in the method embodiments above. The processor 610 may be a general purpose processor or a special purpose processor. For example, the processor may be a central processing unit (central processing unit, CPU). Alternatively, the processor may be another general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The apparatus 600 may also include one or more memories 620. The memory 620 has stored thereon a program that can be executed by the processor 610 to cause the processor 610 to perform the method described in the method embodiments above. The memory 620 may be separate from the processor 610 or may be integrated into the processor 610.

The apparatus 600 may also include a transceiver 630. The processor 610 may communicate with other devices or chips through a transceiver 630. For example, the processor 610 may transmit and receive data to and from other devices or chips through the transceiver 630.

The embodiment of the application also provides a computer readable storage medium for storing a program. The computer-readable storage medium is applicable to the communication apparatus provided in the embodiments of the present application, and the program causes a computer to execute the method performed by the communication apparatus in the embodiments of the present application.

Embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product may be applied to a communication apparatus provided in the embodiments of the present application, and the program causes a computer to execute the method executed by the communication apparatus in the embodiments of the present application.

The embodiment of the application also provides a computer program. The computer program is applicable to the communication device provided in the embodiments of the present application, and causes the computer to execute the method executed by the communication device in the embodiments of the present application.

It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be through some interface, device or unit, or may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disk (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A communication method, characterized in that the method is applied to a terminal device, the terminal device being configured with first information indicating whether at least one independent non-public network, SNPN, identity supports a public warning system, PWS, function, the method comprising:

the terminal equipment receives second information sent by the network equipment, wherein the second information comprises M SNPN identifiers, and M is a positive integer;

and the terminal equipment selects a target SNPN identifier at least according to the first information and the second information.
The method of claim 1, wherein the first information is specified by protocol default or configured by a network device.
The method according to claim 1 or 2, characterized in that the terminal device is configured with third information, the third information containing N SNPN identities, the first information indicating whether the N SNPN identities support PWS functionality or whether the M SNPN identities support PWS functionality, N being a positive integer.
The method of claim 3, wherein the N SNPN identifications are divided into K groups of SNPN identifications, wherein the first information indicates whether each of the K groups of SNPN identifications supports a PWS function or wherein the first information indicates whether each of the N SNPN identifications supports a PWS function, and wherein K is a positive integer.
A method according to claim 3, characterized in that the first information indicates whether each of the M SNPN identities supports PWS functionality or whether the first cell in which the terminal device is currently located supports PWS functionality.
The method of claim 5, wherein the first information indicates that each of the M SNPN identifications corresponding to a first cell in which the terminal device is currently located does not support a PWS function, or wherein the first information indicates that the first cell in which the terminal device is currently located does not support a PWS function;

the terminal device selects a target SNPN identifier at least according to the first information and the second information, and the terminal device comprises:

and the terminal equipment selects a target SNPN identifier according to the first information, the second information and the third information.
The method of claim 6, wherein the terminal device selecting a target SNPN identification based on the first information, the second information, and the third information comprises:

the terminal equipment selects the target SNPN identifier from the candidate SNPN identifier set, wherein the candidate SNPN identifier set comprises SNPN identifiers after the M SNPN identifiers are excluded from the N SNPN identifiers.
The method of claim 5, wherein the first information indicates that each of the M SNPN identifications corresponding to a first cell in which the terminal device is currently located does not support a PWS function, or wherein the first information indicates that the first cell in which the terminal device is currently located does not support a PWS function, the method further comprising:

the terminal equipment re-searches a second cell;

and the terminal equipment selects the target SNPN identifier from the SNPN identifier set provided by the second cell.
The method of claim 8, wherein the terminal device re-searches for the second cell, comprising:

the non-access layer of the terminal equipment sends first indication information to the access layer of the terminal equipment through a first interlayer interaction message, wherein the first indication information is used for indicating the access layer of the terminal equipment to search cells again;

And responding to the first indication information, and searching the second cell by the access layer of the terminal equipment.
The method according to claim 8 or 9, characterized in that the method comprises:

the non-access stratum transmits second indication information to the access stratum, wherein the second indication information comprises at least one of the following items:

the indication information of the cell searching is forbidden to be carried out by using the physical cell identifier PCI corresponding to the cell searched last time;

forbidden duration configuration information for forbidding cell search by using the cell corresponding PCI searched last time;

the indication information of the cell searching is forbidden to be carried out by using the corresponding frequency point of the cell searched last time;

forbidden duration configuration information for forbidding cell search by using the corresponding frequency point of the cell searched last time;

and prohibiting the indication information residing in the same cell as the corresponding tracking area identifier TAC of the cell searched last time.
The method according to any of claims 1 to 5, wherein the terminal device selecting a target SNPN identification based at least on the first information and the second information, comprises:

the terminal equipment determines a first SNPN identifier set corresponding to a first priority in the M SNPN identifiers;

And the terminal equipment selects the target SNPN identifier from the first SNPN identifier set according to the first information.
The method of claim 11, wherein the terminal device selecting the target SNPN identification from the first SNPN identification set based on the first information comprises:

the terminal equipment determines whether SNPN identifiers supporting a PWS function exist in the first SNPN identifier set according to the first information;

if the SNPN identifier supporting the PWS function exists in the first SNPN identifier set, the terminal equipment selects the SNPN identifier supporting the PWS function as the target SNPN identifier;

and if the SNPN identifiers in the first SNPN identifier set do not support the PWS function, the terminal equipment selects the target SNPN identifier from the M SNPN identifiers according to the network identifier priority.
The method of claim 11, wherein the method further comprises:

if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, the terminal equipment determines a second SNPN identifier set of a second priority in the M SNPN identifiers;

and the terminal equipment selects the target SNPN identifier from the second SNPN identifier set according to the first information.
The method according to any of claims 1 to 5, wherein the terminal device selecting a target SNPN identification based at least on the first information and the second information, comprises:

the terminal equipment determines SNPN identifiers supporting a PWS function in the M SNPN identifiers as a third SNPN identifier set according to the first information;

and if the SNPN identifiers supporting the PWS function exist in the M SNPN identifiers, the terminal equipment selects the SNPN identifier with the highest priority in the third SNPN identifier set as the target SNPN identifier.
The method according to claims 1 to 14, characterized in that the terminal device is configured with fourth information indicating that the terminal device preferentially selects a SNPN identity supporting PWS functionality;

the fourth information is configured to the terminal equipment through a pre-configuration process or the network equipment configuration process;

the terminal device selects a target SNPN identifier at least according to the first information and the second information, and the terminal device comprises:

and the terminal equipment selects the target SNPN identifier at least according to the first information, the second information and the fourth information.
The method according to any one of claims 1 to 15, wherein the terminal device receives second information sent by a network device, comprising:

The access layer of the terminal equipment receives the second information sent by the network equipment, and the access layer transmits the second information to the non-access layer of the terminal equipment through a second interlayer interaction message;

the terminal device selects a target SNPN identifier at least according to the first information and the second information, and the terminal device comprises:

the non-access layer of the terminal equipment selects the target SNPN identifier according to the first information and the second information, or the non-access layer of the terminal equipment selects the target SNPN identifier according to the first information, the second information and the third information.
The method according to any one of claims 1 to 16, wherein the terminal device receives second information sent by a network device, comprising:

and the terminal equipment receives the first information and the second information sent by the network equipment.
The method of claim 17, wherein the terminal device receiving the first information and the second information sent by the network device comprises:

the access layer of the terminal equipment receives the first information and the second information;

The access layer of the terminal equipment transmits the first information and the second information to a non-access layer of the terminal equipment through a third interlayer interaction message;

the terminal device selects a target SNPN identifier according to the first information and the second information, and the terminal device comprises:

the non-access layer of the terminal equipment selects the target SNPN identifier according to the first information and the second information, or the non-access layer of the terminal equipment selects the target SNPN identifier according to the first information, the second information and the third information.
The method according to any one of claims 1 to 18, further comprising:

the terminal device sends capability indication information to the network device, wherein the capability indication information is used for indicating whether the terminal device supports a PWS function or not.
A method of communication, comprising:

the network equipment sends second information to the terminal equipment, wherein the second information comprises M independent non-public network SNPN identifiers, and M is a positive integer;

the terminal equipment is configured with first information, and the first information indicates whether at least one SNPN identifier supports a Public Warning System (PWS) function.
The method of claim 20, wherein the first information is specified by protocol default or configured by a network device.
The method according to claim 20 or 21, wherein the terminal device is configured with third information, the third information comprising N SNPN identities, the first information indicating whether the N SNPN identities support a PWS function or whether the M SNPN identities support a PWS function, N being a positive integer.
The method of claim 22, wherein the N SNPN identifications are divided into K groups of SNPN identifications, wherein the first information indicates whether each of the K groups of SNPN identifications supports PWS functionality or whether each of the N SNPN identifications supports PWS functionality, and wherein K is a positive integer.
The method of claim 22, wherein the first information indicates whether each of the M SNPN identities supports PWS functionality or whether a first cell in which the terminal device is currently located supports PWS functionality.
The method according to any one of claims 20 to 24, further comprising:

The network device sends fourth information to the terminal device, the fourth information indicates the terminal device to preferentially select SNPN identifiers supporting the PWS function, and the fourth information is configured to the terminal device through a pre-configuration process or the network device configuration process.
The method according to any of the claims 20 to 25, wherein the network device sending the second information to the terminal device comprises:

and the network equipment sends the second information to an access layer of the terminal equipment.
The method according to any of the claims 20 to 26, wherein the network device sending the second information to the terminal device comprises:

the network device sends the first information and the second information to the terminal device.
The method of claim 27, wherein the network device sending the first information and the second information to the terminal device comprises:

and the network equipment sends the first information and the second information to an access layer of the terminal equipment.
The method according to any one of claims 20 to 28, further comprising:

The network device receives capability indication information sent by the terminal device, where the capability indication information is used to indicate whether the terminal device supports a PWS function.
A communication apparatus configured with first information indicating whether at least one independent non-public network, SNPN, identity supports public warning system, PWS, functionality, the apparatus comprising:

the receiving unit is used for receiving second information sent by the network equipment, wherein the second information comprises M SNPN identifiers, and M is a positive integer;

and the selection unit is used for selecting a target SNPN identifier at least according to the first information and the second information.
The apparatus of claim 30, wherein the first information is specified by protocol default or configured by a network device.
The apparatus of claim 30 or 31, wherein the apparatus is configured with third information, the third information comprising N SNPN identities, the first information indicating whether the N SNPN identities support PWS functionality or whether the M SNPN identities support PWS functionality, N being a positive integer.
The apparatus of claim 32, wherein the N SNPN identifications are divided into K sets of SNPN identifications, wherein the first information indicates whether each of the K sets of SNPN identifications supports PWS functionality or whether each of the N SNPN identifications supports PWS functionality, and wherein K is a positive integer.
The apparatus of claim 32, wherein the first information indicates whether each of the M SNPN identifications supports PWS functionality or whether a first cell in which the apparatus is currently located supports PWS functionality.
The apparatus of claim 34, wherein the first information indicates that each of the M SNPN identifications corresponding to a first cell in which the apparatus is currently located does not support PWS functionality or the first information indicates that the first cell in which the apparatus is currently located does not support PWS functionality;

wherein, the selection unit is specifically configured to: and selecting a target SNPN identifier according to the first information, the second information and the third information.
The method according to claim 35, wherein the selection unit is specifically configured to:

and selecting the target SNPN identifier from the candidate SNPN identifier set, wherein the candidate SNPN identifier set comprises SNPN identifiers after the M SNPN identifiers are excluded from the N SNPN identifiers.
The apparatus of claim 34, wherein the first information indicates that each of the M SNPN identifications corresponding to a first cell in which the apparatus is currently located does not support a PWS function, or wherein the first information indicates that the first cell in which the terminal device is currently located does not support a PWS function, the apparatus further comprising a search unit configured to: re-searching the second cell;

Wherein the selection unit is further configured to: and selecting the target SNPN identifier from the SNPN identifier set provided by the second cell.
The apparatus according to claim 37, wherein the search unit is specifically configured to: sending first indication information to an access layer of the device through a first interlayer interaction message, wherein the first indication information is used for indicating the access layer of the device to search cells again; and searching the second cell in response to the first indication information.
The apparatus according to claim 37 or 38, wherein the search unit is further configured to: transmitting second indication information to the access layer, wherein the second indication information comprises at least one of the following:

the indication information of the cell searching is forbidden to be carried out by using the physical cell identifier PCI corresponding to the cell searched last time;

forbidden duration configuration information for forbidding cell search by using the cell corresponding PCI searched last time;

the indication information of the cell searching is forbidden to be carried out by using the corresponding frequency point of the cell searched last time;

forbidden duration configuration information for forbidding cell search by using the corresponding frequency point of the cell searched last time;

And prohibiting the indication information residing in the same cell as the corresponding tracking area identifier TAC of the cell searched last time.
The apparatus according to any one of claims 30 to 34, wherein the selection unit is specifically configured to: determining a first SNPN identifier set corresponding to a first priority in the M SNPN identifiers; and selecting the target SNPN identifier from the first SNPN identifier set according to the first information.
The apparatus according to claim 40, wherein the selection unit is specifically configured to: determining whether SNPN identifiers supporting a PWS function exist in the first SNPN identifier set according to the first information;

if the SNPN identification supporting the PWS function exists in the first SNPN identification set, selecting the SNPN identification supporting the PWS function as the target SNPN identification;

and if the SNPN identifiers in the first SNPN identifier set do not support the PWS function, selecting the target SNPN identifier from the M SNPN identifiers according to the network identifier priority.
The apparatus of claim 40, wherein the selection unit is further configured to: if none of the SNPN identifiers in the first SNPN identifier set supports the PWS function, determining a second SNPN identifier set of a second priority in the M SNPN identifiers; and selecting the target SNPN identifier from the second SNPN identifier set according to the first information.
The apparatus according to any one of claims 30 to 34, wherein the selection unit is specifically configured to: determining SNPN identifiers supporting a PWS function in the M SNPN identifiers as a third SNPN identifier set according to the first information;

and if the SNPN identifiers supporting the PWS function exist in the M SNPN identifiers, selecting the SNPN identifier with the highest priority in the third SNPN identifier set as the target SNPN identifier.
The apparatus according to claim 30 or 34, characterized in that the apparatus is configured with fourth information indicating that the apparatus preferentially selects an SNPN identification supporting a PWS function, the fourth information being configured to the terminal device through a pre-configuration procedure or the network device configuration procedure;

wherein, the selection unit is specifically configured to: and selecting the target SNPN identification at least according to the first information, the second information and the fourth information.
The apparatus according to any one of claims 30 to 44, wherein the receiving unit is specifically configured to: receiving the second information sent by the network equipment; transmitting the second information to a non-access layer of the device through a second interlayer interaction message;

Wherein, the selection unit is specifically configured to: and selecting the target SNPN identifier according to the first information and the second information, or selecting the target SNPN identifier according to the first information, the second information and the third information.
The apparatus according to any one of claims 30 to 45, wherein the receiving unit is specifically configured to: and receiving the first information and the second information sent by the network equipment.
The apparatus of claim 46, wherein the receiving unit is specifically configured to: receiving the first information and the second information; transmitting the first information and the second information to a non-access layer of the device through a third interlayer interaction message; wherein, the selection unit is specifically configured to: and selecting the target SNPN identifier according to the first information and the second information, or selecting the target SNPN identifier according to the first information, the second information and the third information.
The apparatus according to any one of claims 30 to 47, further comprising a transmitting unit configured to: and sending capability indication information to the network equipment, wherein the capability indication information is used for indicating whether the device supports a PWS function.
A communication device, comprising:

a sending unit, configured to send second information to a terminal device, where the second information includes M independent non-public network SNPN identifiers, and M is a positive integer;

the terminal equipment is configured with first information, and the first information indicates whether at least one SNPN identifier supports a Public Warning System (PWS) function.
The apparatus of claim 49, wherein the first information is either protocol default specified or network device configured.
The apparatus of claim 49 or 50, wherein the terminal device is configured with third information, the third information comprising N SNPN identities, the first information indicating whether the N SNPN identities support PWS functionality or whether the M SNPN identities support PWS functionality, N being a positive integer.
The apparatus of claim 51, wherein the N SNPN identifications are divided into K sets of SNPN identifications, wherein the first information indicates whether each of the K sets of SNPN identifications supports PWS functionality or whether each of the N SNPN identifications supports PWS functionality, and wherein K is a positive integer.
The apparatus of claim 52, wherein the first information indicates whether each of the M SNPN identifications supports PWS functionality or whether a first cell in which the terminal device is currently located supports PWS functionality.
The apparatus of any one of claims 49 to 53, wherein the transmitting unit is further configured to:

and sending fourth information to the terminal equipment, wherein the fourth information indicates the terminal equipment to preferentially select SNPN identifiers supporting the PWS function, and the fourth information is configured to the terminal equipment through a pre-configuration process or the network equipment configuration process.
The apparatus according to any one of claims 49 to 54, wherein the transmitting unit is specifically configured to: and sending the second information to an access layer of the terminal equipment.
The apparatus according to any one of claims 49 to 55, wherein the transmitting unit is specifically configured to: and sending the first information and the second information to the terminal equipment.
The apparatus of claim 56, wherein said transmitting unit is specifically configured to: and sending the first information and the second information to an access layer of the terminal equipment.
The apparatus according to any one of claims 49 to 57, further comprising a receiving unit for: and receiving capability indication information sent by the terminal equipment, wherein the capability indication information is used for indicating whether the terminal equipment supports a PWS function.
A communication device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of any of claims 1 to 19.
A communication device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of any of claims 20 to 29.
A communication device comprising a processor for calling a program from memory to perform the method of any of claims 1 to 19.
A communications device comprising a processor for invoking a program from memory to perform the method of any of claims 20 to 29.
A chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 19.
A chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 20 to 29.
A computer-readable storage medium, characterized in that a program is stored thereon, which program causes a computer to execute the method according to any one of claims 1 to 19.
A computer-readable storage medium, characterized in that a program is stored thereon, which program causes a computer to execute the method according to any one of claims 20 to 29.
A computer program product comprising a program for causing a computer to perform the method of any one of claims 1 to 19.
A computer program product comprising a program for causing a computer to perform the method of any one of claims 20 to 29.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 19.
A computer program, characterized in that the computer program causes a computer to perform the method of any of claims 20 to 29.