CN117835372A

CN117835372A - Network selection method and terminal

Info

Publication number: CN117835372A
Application number: CN202211203277.5A
Authority: CN
Inventors: 蒲文娟; 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2024-04-05

Abstract

The application discloses a network selection method and a terminal, which belong to the technical field of communication, and the network selection method in the embodiment of the application comprises the following steps: and under the condition that the terminal searches at least one available public land mobile network PLMN, selecting a target PLMN from the at least one PLMN, wherein the signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

Description

Network selection method and terminal

Technical Field

The application belongs to the technical field of communication, and particularly relates to a network selection method and a terminal.

Background

In the scenario that the terminal performs network selection, after an Access Stratum (AS) layer of the terminal receives a request of a Non-Access Stratum (NAS) layer of the terminal, the available public land mobile network (Public Land Mobile Network, PLMN) can be searched in a full frequency band, and the available PLMN is reported to the NAS layer of the terminal, and the NAS layer selects a suitable PLMN from the available PLMNs. However, when selecting PLMNs, the selection is generally performed according to the priority of the PLMNs, but the coverage of the corresponding cell of the PLMN with higher priority is not necessarily optimal, which results in poor uplink transmission and downlink reception performance of some terminals. Such as internet of things (Internet of Things, ioT) devices, which often have the characteristics of fixed location and low capability, when such UEs perform cell selection and/or reselection according to the prior art, the selected cell may not meet the transmission requirements of such UEs, for example, the UE has low uplink transmission capability, and a cell with higher signal quality is required.

Disclosure of Invention

The embodiment of the application provides a network selection method and a terminal, which can solve the problem that PLMN selected by the terminal based on the existing scheme cannot guarantee the communication quality of the terminal.

In a first aspect, a network selection method is provided, the method comprising:

and under the condition that the terminal searches at least one available public land mobile network PLMN, selecting a target PLMN from the at least one PLMN, wherein the signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

In a second aspect, there is provided a network selection apparatus, the apparatus comprising:

and the selecting module is used for selecting a target PLMN from at least one PLMN under the condition that at least one available public land mobile network PLMN is searched, and the signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

In a third aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to select a target PLMN from at least one PLMN when an available at least one public land mobile network PLMN is searched, where a signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

In a fifth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor implement the steps of the network selection method according to the first aspect.

In a sixth aspect, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the network selection method according to the first aspect.

In a seventh aspect, a computer program/program product is provided, the computer program/program product being stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the network selection method according to the first aspect.

In the embodiment of the present application, when the terminal searches for at least one available PLMN, the terminal may select a target PLMN with a signal quality greater than or equal to a preset threshold from the at least one PLMN. Therefore, the PLMN with better signal quality can be selected from available PLMNs according to the signal quality of the PLMNs, so that the communication quality of the terminal can be ensured, and the influence on the uplink and downlink receiving and transmitting performance of the terminal is avoided.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG. 2 is a schematic flow chart diagram of a network selection method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a network selection apparatus according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

The network selection method and the terminal provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 2, the embodiment of the present application provides a network selection method 200, which may be performed by a terminal, in other words, by software or hardware installed in the terminal, the network selection method including the following steps.

S202: and under the condition that the terminal searches at least one available public land mobile network PLMN, selecting a target PLMN from the at least one PLMN, wherein the signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

In S202, in case that the terminal searches for at least one available public land mobile network (Public Land Mobile Network, PLMN), the terminal may select a target PLMN from the at least one PLMN according to the signal quality of the at least one PLMN, where the signal quality of the target PLMN is greater than or equal to a preset threshold.

The at least one available PLMN may be searched by an AS layer of the terminal. For example, after the AS layer of the terminal receives the request of the NAS layer of the terminal, the search for PLMNs may be performed in the full frequency band, so AS to obtain at least one available PLMN.

The predetermined threshold may be a threshold associated with a signal level enhanced network selection (Signal level Enhanced Network Selection, SENSE), in which case the predetermined threshold may also be referred to as a SENSE threshold. The preset threshold may be an operator configured signal threshold for different radio access technologies. The specific size of the preset threshold may be set according to an actual application scenario, which is not specifically limited herein. The preset threshold can be written into the SIM/USIM card or configured through a network side.

Optionally, as an embodiment, the terminal selects the target PLMN from at least one PLMN, which may include any one of the following:

under the condition that an AS layer of the terminal receives a preset threshold, the AS layer of the terminal selects a target PLMN from at least one PLMN;

and under the condition that the AS layer of the terminal does not receive the preset threshold, the NAS layer of the terminal selects a target PLMN from at least one PLMN.

That is, when the terminal selects the target PLMN, the operation of selecting the target PLMN may be performed by the AS in the terminal, or may be performed by the NAS layer of the terminal. Specifically, in the case that the AS layer receives the preset threshold, that is, in the case that the AS layer knows the preset threshold, the AS layer may select, according to the preset threshold, the target PLMN from the available at least one PLMN. In case the AS layer does not receive the preset threshold, i.e. in case the AS layer does not know the preset threshold, the NAS layer of the terminal may select the target PLMN from the available at least one PLMN according to the preset threshold. Optionally, the NAS layer may also perform the operation of selecting the target PLMN if the AS layer receives the preset threshold.

In the case that the AS layer of the terminal selects a target PLMN from at least one PLMN, optionally, the AS layer may also report the selected target PLMN to the NAS layer.

Optionally, as an embodiment, the terminal selecting the target PLMN from at least one PLMN may include:

the terminal selects a target PLMN from the at least one PLMN according to the first rule.

The first rule may specifically include any one of the following:

the linear average result of the measurement results of N wave beams in the cell corresponding to the target PLMN is larger than or equal to a preset threshold;

the signal quality of the wave beam with the best signal quality in the cell corresponding to the target PLMN is larger than or equal to a preset threshold;

the signal quality of M wave beams in a cell corresponding to the target PLMN is greater than or equal to a preset threshold.

N and M are integers greater than 0. Alternatively, the N beams may be all beams in a cell, and the M beams may be all or part of the beams in the cell. The measurement result of the beam and the signal quality of the beam may be the reference signal received power (Reference Signal Receiving Power, RSRP) of the beam.

The first rule may be agreed upon by the protocol, or the first rule may be configured or indicated by the network side device. The first rule may also be implemented based on the UE. I.e. the terminal may decide on its own how to use the first rule.

In the case that the first rule is configured or indicated by the network side device, the terminal may further receive configuration information sent by the network side device, where the configuration information is used to indicate the first rule. The terminal receives the configuration information sent by the network side device, and may be that the NAS layer of the terminal receives the configuration information sent by the network side device, where in this case, the configuration information may be sent by the network side device through NAS signaling.

Based on the first rule, when selecting the target PLMN, the terminal may be classified into the following three cases:

first case: the first rule is that a linear average result of measurement results of N beams in a cell corresponding to the target PLMN is greater than or equal to a preset threshold.

In the first case, when the terminal selects the target PLMN, for each PLMN in the available at least one PLMN, it may be determined whether a linear average result of measurement results of N beams in the cell corresponding to the PLMN is greater than or equal to a preset threshold. The measurement results of the N beams in the cell corresponding to the PLMN may be determined by the terminal when the terminal searches for the PLMN, and the linear average result of the measurement results of the N beams may also be calculated by the terminal based on the measurement results of the N beams. If the linear average result of the measurement results of the N beams in the cell corresponding to the PLMN is greater than or equal to the preset threshold, the PLMN may be determined to be the target PLMN, otherwise, if the linear average result of the measurement results of the N beams in the cell corresponding to the PLMN is less than the preset threshold, it may be determined that the PLMN is not the target PLMN, that is, the PLMN is not selected.

Second case: the first rule is that the signal quality of the beam with the best signal quality in the cell corresponding to the target PLMN is greater than or equal to a preset threshold.

In the second case, when the terminal selects the target PLMN, for each PLMN in at least one available PLMN, it may be determined whether the signal quality of the beam with the best signal quality in the cell corresponding to the PLMN is greater than or equal to a preset threshold, that is, whether the signal quality of the strongest beam in the cell corresponding to the PLMN is greater than or equal to the preset threshold. The strongest beam in the cell corresponding to the PLMN may be obtained by comparing signal quality of multiple beams in the cell when the terminal searches the PLMN. If the signal quality of the strongest beam in the cell corresponding to the PLMN is greater than or equal to the preset threshold, the PLMN may be determined to be the target PLMN, otherwise, if the signal quality of the strongest beam in the cell corresponding to the PLMN is less than the preset threshold, the PLMN may be determined not to be the target PLMN, i.e. the PLMN is not selected.

Third case: the first rule is that signal quality of M wave beams in a cell corresponding to the target PLMN is greater than or equal to a preset threshold.

In the third case, when the terminal selects the target PLMN, for each PLMN in the available at least one PLMN, it may be determined whether the signal quality of the M beams in the cell corresponding to the PLMN is greater than or equal to a preset threshold. For example, when the terminal searches the PLMN, all beams in the cell corresponding to the PLMN may be ranked according to the signal quality, and whether there are M beams with the signal quality greater than or equal to the preset threshold is determined according to the ranking result. If so, the PLMN may be determined to be the target PLMN, otherwise, if not, it may be determined not to be the target PLMN, i.e., not selected.

Alternatively, AS an embodiment, when the terminal selects the target PLMN according to the first rule, the AS layer of the terminal may select the target PLMN according to the first rule, or the NAS layer of the terminal may select the target PLMN according to the first rule. For example, when the AS layer receives the preset threshold, the AS layer may select the target PLMN according to the first rule, after selecting the PLMN, the AS layer reports the target PLMN to the NAS layer, and when the AS layer does not receive the preset threshold, the NAS layer may select the target PLMN according to the first rule.

It should be noted that, in the case that the AS layer selects the target PLMN according to the first rule, if the first rule is configured or indicated by the network side device, the AS layer also needs to obtain the first rule. Specifically, when the terminal receives the configuration information for indicating the first rule from the network side device, the NAS layer of the terminal may receive the configuration information, and after receiving the configuration information, the NAS layer may send the first rule indicated by the configuration information to the AS layer, so that the AS layer may obtain the first rule and execute an operation of selecting the target PLMN according to the first rule.

Alternatively, as an embodiment, in the case that the target PLMN is selected by the NAS layer in the terminal, it may include:

The NAS layer of the terminal receives signal quality information of at least one PLMN sent by the AS layer of the terminal;

the NAS layer of the terminal selects a target PLMN from at least one PLMN according to the signal quality information of the at least one PLMN.

That is, when selecting the target PLMN, the NAS layer of the terminal may report signal quality information of at least one available PLMN by the AS layer, and then select the target PLMN from the NAS layer according to the reported signal quality information of the at least one PLMN.

The signal quality information may specifically include any one of the following for any PLMN:

the signal quality of each beam in the cell corresponding to the PLMN;

signal quality of the cell corresponding to the PLMN;

the signal quality of the wave beam with the best signal quality in the cell corresponding to the PLMN;

signal quality of M beams in the cell to which the PLMN corresponds.

The signal quality of the cell corresponding to the PLMN may be a linear average result of measurement results of N beams in the cell or a measurement result of a strongest beam in the cell, and may specifically be calculated or determined by the AS layer based on the measurement results of N beams in the cell.

Optionally, the signal quality information of the at least one PLMN may be determined by the AS layer of the terminal according to the first rule, that is, the AS layer may determine what the signal quality information to report is specifically according to the first rule, and then report the corresponding signal quality information to the NAS layer. For example, if the first rule is that the linear average result of the measurement results of the N beams in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, the signal quality information reported by the AS layer may be the signal quality of each beam in the cell corresponding to the PLMN or the signal quality of the cell corresponding to the PLMN; if the first rule is that the signal quality of the beam with the best signal quality in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, the signal quality information reported by the AS layer can be the signal quality of the beam with the best signal quality in the cell corresponding to the PLMN; if the first rule is that the signal quality of the M beams in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, the signal quality information reported by the AS layer may be the signal quality of the M beams in the cell corresponding to the PLMN.

It should be noted that, in the case that the AS layer determines, according to the first rule, the signal quality information to be reported, if the first rule is configured or indicated by the network side device, the AS layer needs to acquire the first rule. Specifically, when the terminal receives configuration information for indicating the first rule from the network side device, the NAS layer of the terminal may receive the configuration information, and after receiving the configuration information, the NAS layer may send the first rule indicated by the configuration information to the AS layer, so that the AS layer may acquire the first rule, and after searching for at least one available PLMN, may determine, according to the first rule, respective signal quality information of the at least one available PLMN, and then report the signal quality information to the NAS layer.

After receiving the signal quality information of at least one PLMN, the NAS of the terminal may select, as the target PLMN, a PLMN having a signal quality greater than or equal to a preset threshold according to the signal quality information of each of the at least one PLMN. The NAS layer may also select the target PLMN according to the signal quality information of at least one PLMN in combination with the first rule. For example, if the first rule is that the signal quality of the beam with the best signal quality in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, and the signal quality information reported by the AS layer is the signal quality of the beam with the best signal quality in the cell corresponding to each of the at least one PLMN, then the NAS layer may compare the signal quality of each PLMN (i.e., the signal quality of the strongest beam in the corresponding cell) with the preset threshold according to the first rule, and select the PLMN with the signal quality greater than or equal to the preset threshold AS the target PLMN.

In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, the following may be described by taking several embodiments in which the terminal selects the target PLMN according to the first rule as an example.

Embodiment one: the protocol agrees with a first rule, where the first rule is that the signal quality of the strongest beam in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, and the AS layer of the terminal knows the preset threshold.

In the context of embodiment one, the target PLMN may be selected by:

step 1: and the AS layer of the terminal executes PLMN searching operation to search at least one available PLMN.

Step 2: according to the protocol convention, the AS layer compares the signal quality of the strongest wave beam in the cell corresponding to each available PLMN with a preset threshold, and determines the PLMN with the signal quality larger than or equal to the preset threshold AS the target PLMN.

Step 3: the AS layer reports the target PLMN to the NAS layer.

Embodiment two: the protocol agrees with a first rule, where the first rule is that the signal quality of the strongest beam in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, and the AS layer of the terminal does not know the preset threshold.

In the scenario of embodiment two, the target PLMN may be selected by:

Step 2: according to the protocol convention, the AS layer reports the signal quality of each available PLMN and the strongest wave beam in the cell corresponding to each available PLMN to the NAS layer. Optionally, the AS layer sends the signal quality of the strongest beam AS the signal quality of the cell to the NAS layer.

Step 3: the NAS layer selects a target PLMN according to the signal quality of the strongest beam in the cell corresponding to each available PLMN reported by the AS layer and a preset threshold. Or the NAS layer selects the target PLMN according to the signal quality and the preset threshold in the cell corresponding to each available PLMN reported by the AS layer.

Specifically, the NAS layer may compare the signal quality of the strongest beam in the cell corresponding to each PLMN with a preset threshold, and select a PLMN with the signal quality greater than or equal to the preset threshold. Optionally, the AS layer may report the signal quality to the NAS layer for different radio access technologies.

Embodiment III: the network side equipment configures or indicates a first rule, wherein the first rule is that the signal quality of the strongest beam in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, and an AS layer of the terminal knows the preset threshold.

In the scenario of embodiment three, the target PLMN may be selected by:

step 1: the NAS of the terminal receives configuration information sent by the network side equipment, wherein the configuration information is used for indicating a first rule.

The first rule here is that the signal quality of the strongest beam in the cell corresponding to the target PLMN is greater than or equal to the preset threshold, that is, the signal quality of the beam with the best signal quality in the cell corresponding to the target PLMN is greater than or equal to the preset threshold. That is, the configuration information indicates that the terminal takes the signal quality of the strongest beam as the quality of the cell when performing a comparison of the cell quality with a preset threshold.

Step 2: the NAS layer sends the first rule to the AS layer.

Step 3: the AS layer performs PLMN searching operation to search available at least one PLMN.

Step 4: according to a first rule, the AS layer compares the signal quality of the strongest beam in the cell corresponding to each available PLMN with a preset threshold, and determines the PLMN with the signal quality greater than or equal to the preset threshold AS a target PLMN.

Step 5: the AS layer reports the target PLMN to the NAS layer.

Embodiment four: the network side equipment configures or indicates a first rule, wherein the first rule is that the signal quality of the strongest beam in the cell corresponding to the target PLMN is greater than or equal to a preset threshold, and an AS layer of the terminal does not know the preset threshold.

In the scenario of embodiment four, the target PLMN may be selected by:

Step 2: the NAS layer sends the first rule to the AS layer.

The NAS layer sends a first rule to the AS layer, which can be regarded AS that when the NAS layer requests to report the available PLMNs to the AS layer, the NAS layer reports the signal quality of the strongest beam of each available PLMN.

Step 3: and the AS layer of the terminal executes PLMN searching operation to search at least one available PLMN.

Step 4: according to the first rule, the AS layer reports the signal quality of each available PLMN and the strongest beam in the cell corresponding to each available PLMN to the NAS layer.

Step 5: the NAS layer selects a target PLMN according to the signal quality of the strongest beam in the cell corresponding to each available PLMN reported by the AS layer and a preset threshold.

Specifically, the NAS layer may compare the signal quality of the strongest beam in the cell corresponding to each PLMN with a preset threshold, and select a PLMN with the signal quality greater than or equal to the preset threshold.

Fifth embodiment: the first rule depends on the UE implementation.

Step 2: the AS layer of the terminal reports the signal quality of the cell corresponding to each PLMN to the NAS layer. Specifically, the terminal determines, based on the UE implementation, whether to take a linear average of signal quality of N beams in the cell as the signal quality of the cell or the signal quality of the strongest beam as the signal quality of the cell.

According to the network selection method provided by the embodiment of the application, the execution subject can be a network selection device. In the embodiment of the present application, a network selection device executes a network selection method as an example, and the network selection device provided in the embodiment of the present application is described.

Fig. 3 is a schematic structural diagram of a network selection device according to an embodiment of the present application, which may correspond to a terminal in other embodiments. As shown in fig. 3, the apparatus 300 includes the following modules.

A selecting module 301, configured to select a target PLMN from at least one PLMN when at least one available public land mobile network PLMN is searched, where a signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

Optionally, as an embodiment, the selecting module 301 is configured to either:

selecting a target PLMN from the at least one PLMN under the condition that an access AS layer of the terminal receives the preset threshold;

and selecting a target PLMN from the at least one PLMN under the condition that the access AS layer of the terminal does not receive the preset threshold.

Optionally, as an embodiment, the selecting module 301 is configured to:

selecting the target PLMN from the at least one PLMN according to a first rule, the first rule comprising any one of:

the linear average result of the measurement results of N wave beams in the cell corresponding to the target PLMN is larger than or equal to the preset threshold;

the signal quality of the wave beam with the best signal quality in the cell corresponding to the target PLMN is larger than or equal to the preset threshold;

and the signal quality of M wave beams in the cell corresponding to the target PLMN is greater than or equal to the preset threshold.

Optionally, as an embodiment, the first rule is agreed by a protocol; or alternatively, the first and second heat exchangers may be,

the first rule is configured or indicated by the network side device.

Optionally, as an embodiment, in a case where the first rule is configured or indicated by the network side device, the apparatus 300 further includes a receiving module 302, where the receiving module 302 is configured to:

and receiving configuration information sent by the network side equipment, wherein the configuration information is used for indicating the first rule.

Optionally, as an embodiment, the receiving module 302 is configured to;

receiving the configuration information sent by the network side equipment;

and sending the first rule to an AS layer of the terminal.

Optionally, as an embodiment, the apparatus 300 further includes a sending module 303, where the sending module 303 is configured to:

and reporting the target PLMN to a NAS layer of the terminal.

Optionally, as an embodiment, the selecting module 301 is configured to:

receiving signal quality information of the at least one PLMN sent by an AS layer of the terminal;

and selecting a target PLMN from the at least one PLMN according to the signal quality information of the at least one PLMN.

Optionally, AS an embodiment, the signal quality information of the at least one PLMN is determined by an AS layer of the terminal according to a first rule.

Optionally, as an embodiment, for any PLMN of the at least one PLMN, the signal quality information of the PLMN includes any of the following:

the signal quality of each wave beam in the cell corresponding to the PLMN;

the signal quality of the cell corresponding to the PLMN;

signal quality of M beams in the cell corresponding to the PLMN.

Optionally, as an embodiment, the signal quality of the cell corresponding to the PLMN is a linear average result of measurement results of N beams in the cell or a measurement result of a strongest beam in the cell.

Optionally, as an embodiment, the preset threshold is a threshold related to a network selection SENSE of signal level enhancement.

The apparatus 300 according to the embodiment of the present application may refer to the flow of the method 200 corresponding to the embodiment of the present application, and each unit/module in the apparatus 300 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 200, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

The network selecting device in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The network selection device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, so that repetition is avoided, and no further description is provided herein.

Optionally, as shown in fig. 4, the embodiment of the present application further provides a communication device 400, including a processor 401 and a memory 402, where the memory 402 stores a program or instructions that can be executed on the processor 401, for example, when the communication device 400 is a terminal, the program or instructions implement the steps of the network selection method embodiment described above when executed by the processor 401, and achieve the same technical effects. When the communication device 400 is a network side device, the program or the instruction, when executed by the processor 401, implements the steps of the above-described network selection method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for selecting a target PLMN from at least one PLMN under the condition that at least one available public land mobile network PLMN is searched, and the signal quality corresponding to the target PLMN is greater than or equal to a preset threshold. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 5 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 500 includes, but is not limited to: at least some of the components of the radio frequency unit 501, the network module 502, the audio output unit 503, the input unit 504, the sensor 505, the display unit 506, the user input unit 507, the interface unit 508, the memory 509, and the processor 510.

Those skilled in the art will appreciate that the terminal 500 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 510 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 5 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 504 may include a graphics processing unit (Graphics Processing Unit, GPU) 5041 and a microphone 5042, with the graphics processor 5041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 507 includes at least one of a touch panel 5071 and other input devices 5072. Touch panel 5071, also referred to as a touch screen. Touch panel 5071 may include two parts, a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 501 may transmit the downlink data to the processor 510 for processing; in addition, the radio frequency unit 501 may send uplink data to the network side device. Typically, the radio frequency unit 501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 509 may be used to store software programs or instructions as well as various data. The memory 509 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 509 may include volatile memory or nonvolatile memory, or the memory 509 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 509 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 510 may include one or more processing units; optionally, the processor 510 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, etc., and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 510.

The processor 510 is configured to select a target PLMN from at least one PLMN if at least one available PLMN is searched, where a signal quality corresponding to the target PLMN is greater than or equal to a preset threshold.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the processes of the embodiment of the network selection method are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running a program or an instruction, so as to implement each process of the network selection method embodiment, and achieve the same technical effect, so that repetition is avoided, and no redundant description is provided here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the above-mentioned network selection method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and details are not repeated herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A method of network selection, comprising:

2. The method of claim 1, wherein the selecting a target PLMN from the at least one PLMN comprises any of:

under the condition that an access AS layer of the terminal receives the preset threshold, the AS layer of the terminal selects a target PLMN from the at least one PLMN;

and under the condition that the AS layer of the terminal does not receive the preset threshold, selecting a target PLMN from the at least one PLMN by a non-access NAS layer of the terminal.

3. The method according to claim 1 or 2, wherein the terminal selecting a target PLMN from the at least one PLMN comprises:

the terminal selects the target PLMN from the at least one PLMN according to a first rule, the first rule comprising any one of:

4. A method according to claim 3, comprising:

the first rule is agreed by a protocol; or alternatively, the first and second heat exchangers may be,

the first rule is configured or indicated by the network side device.

5. The method of claim 4, wherein, in the case where the first rule is configured or indicated by a network-side device, the method further comprises:

the terminal receives configuration information sent by the network side equipment, wherein the configuration information is used for indicating the first rule.

6. The method of claim 5, wherein the method further comprises:

the NAS layer of the terminal receives the configuration information sent by the network side equipment;

and the NAS layer of the terminal sends the first rule to the AS layer of the terminal.

7. The method according to claim 2, wherein in case the AS layer of the terminal selects a target PLMN from the at least one PLMN, the method further comprises:

And the AS layer of the terminal reports the target PLMN to the NAS layer of the terminal.

8. The method of claim 2, wherein the NAS layer of the terminal selects a target PLMN from the at least one PLMN, comprising:

the NAS layer of the terminal receives the signal quality information of the at least one PLMN sent by the AS layer of the terminal;

and the NAS layer of the terminal selects a target PLMN from the at least one PLMN according to the signal quality information of the at least one PLMN.

9. The method of claim 8, wherein the signal quality information of the at least one PLMN is determined by an AS layer of the terminal according to a first rule.

10. The method of claim 8, wherein, for any PLMN of the at least one PLMN, the signal quality information for the PLMN comprises any of:

the signal quality of each wave beam in the cell corresponding to the PLMN;

the signal quality of the cell corresponding to the PLMN;

signal quality of M beams in the cell corresponding to the PLMN.

11. The method of claim 10, wherein the signal quality of the cell corresponding to the PLMN is a linear average of measurements of N beams in the cell or a measurement of a strongest beam in the cell.

12. The method of claim 1, wherein the predetermined threshold is a threshold associated with a network selection SENSE of signal level enhancement.

13. A network selection device, comprising:

14. The apparatus of claim 13, wherein the selection module is configured to:

15. The apparatus according to claim 13 or 14, wherein the selection module is configured to:

16. The apparatus as claimed in claim 15, comprising:

the first rule is configured or indicated by the network side device.

17. The apparatus of claim 16, wherein in the case where the first rule is configured or indicated by a network-side device, the apparatus further comprises a receiving module configured to:

18. The apparatus of claim 17, wherein the receiving module is configured to;

receiving the configuration information sent by the network side equipment;

and sending the first rule to an AS layer of the terminal.

19. The apparatus of claim 14, further comprising a transmission module configured to:

and reporting the target PLMN to a NAS layer of the terminal.

20. The apparatus of claim 14, wherein the selection module is configured to:

21. The apparatus of claim 20, wherein the signal quality information for the at least one PLMN is determined by an AS layer of the terminal according to a first rule.

22. The apparatus of claim 20, wherein, for any one of the at least one PLMN, the signal quality information for the PLMN comprises any one of:

the signal quality of each wave beam in the cell corresponding to the PLMN;

the signal quality of the cell corresponding to the PLMN;

signal quality of M beams in the cell corresponding to the PLMN.

23. The apparatus of claim 22, wherein the signal quality of the cell corresponding to the PLMN is a linear average of measurements of N beams in the cell or a measurement of a strongest beam in the cell.

24. The apparatus of claim 13, wherein the predetermined threshold is a threshold associated with a network selection SENSE for signal level enhancement.

25. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the network selection method according to any one of claims 1 to 12.

26. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the network selection method according to any of claims 1 to 12.