CN106714134B - Network searching method and device of mobile terminal and mobile terminal - Google Patents

Network searching method and device of mobile terminal and mobile terminal Download PDF

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Publication number
CN106714134B
CN106714134B CN201611190553.3A CN201611190553A CN106714134B CN 106714134 B CN106714134 B CN 106714134B CN 201611190553 A CN201611190553 A CN 201611190553A CN 106714134 B CN106714134 B CN 106714134B
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network
communication system
searching
frequency point
mobile terminal
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CN106714134A (en
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张霞
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Nanchang Black Shark Technology Co Ltd
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Nanchang Black Shark Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a network searching method and device of a mobile terminal and the mobile terminal. The network searching method of the mobile terminal provided by the invention comprises the following steps: searching a network according to a first communication system; if the network corresponding to the first communication system is not searched, searching the network according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system; and if the network corresponding to the second communication system is searched, controlling the mobile terminal to reside in the network corresponding to the second communication system, and searching the network again according to the first communication system. The invention can effectively shorten the process of returning the mobile terminal to the network corresponding to the communication system with higher priority, and improve the user experience.

Description

Network searching method and device of mobile terminal and mobile terminal
Technical Field
The present invention relates to communications technologies, and in particular, to a network searching method and apparatus for a mobile terminal, and a mobile terminal.
Background
A mobile terminal without communication service cannot implement normal communication service. In order to implement normal communication services, a Mobile terminal needs to establish a Mobile Network connection with a Public Land Mobile Network (PLMN, for short) where the Mobile terminal is located.
For a mobile terminal without communication service, before establishing a mobile network connection, the mobile terminal needs to determine a first communication system according to a preset system priority, and perform network searching according to the first communication system. If the network is not searched, determining that the next communication system lower than the priority of the first communication system is a second communication system according to the preset system priority, and continuing to search for the network according to the second communication system. And if the network is searched according to the second communication system, performing network registration according to the searched network corresponding to the second communication system. In order to ensure the network quality of the mobile terminal, in this case, if the first communication system usually recovers to the network, the mobile terminal needs to perform cell reselection first, and perform location information according to the reselected location so as to access to the network corresponding to the first communication system.
Therefore, the process of returning the mobile terminal to the network corresponding to the communication system with the higher priority is longer, and the user experience is poorer.
Disclosure of Invention
The invention provides a network searching method and device of a mobile terminal and the mobile terminal, which are used for shortening the access process of the mobile terminal returning to a network corresponding to a communication system with higher priority and improving user experience.
The invention provides a network searching method of a mobile terminal, which comprises the following steps:
searching a network according to a first communication system;
if the network corresponding to the first communication system is not searched, searching the network according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system;
and if the network corresponding to the second communication system is searched, controlling the mobile terminal to reside in the network corresponding to the second communication system, and searching the network again according to the first communication system.
The invention also provides a network searching device of the mobile terminal, which comprises:
the access layer AS module is used for searching networks according to a first communication system, and if the network corresponding to the first communication system is not searched, the access layer AS module searches the networks according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system;
the non-access stratum (NAS) module is used for controlling the mobile terminal to reside in the network corresponding to the second communication system if the network corresponding to the second communication system is searched;
and the AS module is further used for continuing to search for the network according to the first communication system again if the network corresponding to the second communication system is searched.
The present invention also provides a mobile terminal, comprising: a processor and a memory; the processor is connected with the memory, and the memory stores program codes;
the processor is configured to call the program code stored in the memory to implement the network searching method of the mobile terminal.
The network searching method, the device and the mobile terminal of the mobile terminal provided by the invention can search a network according to a second communication system with the network searching priority lower than that of a first communication system under the condition that the network corresponding to the first communication system is not searched, and can control the mobile terminal to reside in the network corresponding to the second communication system even if the network corresponding to the second communication system is searched, and not directly perform network registration according to the searched network corresponding to the second communication system, and also perform network searching according to the first communication system, and timely determine whether the first communication system recovers the network, thereby effectively avoiding the operations of cell reselection, position updating and the like of the mobile terminal under the condition that the network corresponding to the second communication system is registered and the first communication system recovers the network, and effectively shortening the process of returning the mobile terminal to the network corresponding to the higher-priority communication system, the user experience is improved.
Drawings
Fig. 1 is a flowchart of a network searching method of a mobile terminal according to the present invention;
fig. 2 is a flowchart of another network searching method of a mobile terminal according to the present invention;
fig. 3 is a flowchart of a network searching method of a mobile terminal according to another embodiment of the present invention;
fig. 4 is a flowchart of a network searching method of a mobile terminal according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a network searching apparatus according to the present invention;
fig. 6 is a schematic structural diagram of a mobile terminal according to the present invention.
Detailed Description
The network searching method of each mobile terminal provided by the invention is suitable for any type of mobile terminals without communication service, such as mobile terminals just started, mobile terminals quitting flight mode, mobile terminals disconnecting network connection and the like. The mobile terminal can be any mobile terminal which can support a mobile network, such as a mobile phone, a tablet computer, an intelligent wearable device and the like. By executing the network searching method of each mobile terminal provided by the invention, under the condition that a network corresponding to a first communication system is not searched, the network searching can be carried out according to a second communication system with the network searching priority lower than the first communication system, if the network corresponding to the second communication system is searched, the mobile terminal can be controlled to reside in the network corresponding to the second communication system instead of directly carrying out network registration according to the searched network corresponding to the second communication system, and even if the network corresponding to the second communication system is searched, the network searching is carried out according to the first communication system, and whether the first communication system recovers the network is determined, so that the operations of cell reselection, position updating and the like of the mobile terminal can be effectively avoided, and the process of returning the mobile terminal to the network corresponding to the higher-priority communication system is effectively shortened, the user experience is improved.
This is illustrated below by way of a number of examples. Fig. 1 is a flowchart of a network searching method of a mobile terminal according to the present invention. As shown in fig. 1, the method may include the following:
s101, searching the network according to the first communication system.
The first communication format may be determined by a Non-access stratum (Non-access stratum) module Of the mobile terminal after receiving an Out Of Service (OOS) notification sent by a bottom layer module Of the mobile terminal. When a user carries a mobile terminal to enter an elevator without a network, and a bottom layer module detects that the mobile terminal cannot send uplink data or cannot receive downlink data, the mobile terminal can be determined to lose service, and the OOS notification can be sent to the NAS. For example, the NAS module may determine, after receiving the OOS notification, a preferred PLMN of a network to be searched according to a preset communication standard protocol, and determine that a communication system corresponding to the preferred PLMN is the first communication system.
Optionally, the first communication system may be, for example: a Long Term Evolution (Long Term Evolution, LTE for short) communication system. The preset communication standard protocol may be, for example, a 3GPP23.122 protocol, and of course, may also be another communication standard protocol, which is only an example herein. The invention is not so limited.
In S101, network searching may be performed on a preset frequency band corresponding to the first communication system, or network searching may be performed on a preset frequency point corresponding to the first communication system.
In an example, if a network search is performed on a preset frequency band corresponding to a first communication system, after determining the first communication system, the NAS module as described above needs to determine the preset frequency band corresponding to the first communication system. The NAS module may be an (Access Stratum, abbreviated AS) module that notifies the preset frequency band corresponding to the first communication system to the mobile terminal after determining the preset frequency band corresponding to the first communication system, so that the AS module searches for a network on the preset frequency band corresponding to the first communication system. The preset frequency band may include all frequency bands supported by the first communication system, and the preset frequency band may also include at least one frequency band supported by the first communication system.
In another example, if the network search is performed on the preset frequency point corresponding to the first communication system, after the NAS module determines the first communication system, the preset frequency point corresponding to the first communication mode needs to be determined. The NAS module may also be configured to notify the preset frequency point corresponding to the first communication system to the AS module after determining the preset frequency point corresponding to the first communication system, so that the AS module searches for a network at the preset frequency point corresponding to the first communication system.
And S102, if the network corresponding to the first communication system is not searched, searching the network according to the second communication system.
The network searching priority of the first communication system is greater than the network searching priority of the second communication system.
Optionally, if the first communication system is: the LTE communication system, the second communication system may be: a Wideband Code Division Multiple Access (WCDMA) Communication System, a Universal Mobile Telecommunications System (UMTS) Communication System, a Global System for Mobile communications (GSM) Communication System, or any other Communication System.
After the S101 is executed, the AS module of the mobile terminal may send the network searching result to the NAS module of the mobile terminal, and the NAS module determines whether to search for the network corresponding to the first communication system according to the network searching result. If so, the NAS module performs network registration on the mobile terminal according to the searched network corresponding to the first communication system; if not, the NAS module sends a network searching notification including the second communication system to the AS module, so that the AS module searches the network according to the second communication system.
Wherein, if the network searching notification can include: if the preset frequency band corresponds to the second communication system, the AS module can search for a network according to the preset frequency band corresponding to the second communication system; if the network searching notification can include: and if the preset frequency point corresponds to the second communication system, the AS module can search the network according to the preset frequency point corresponding to the second communication system.
S103, if the network corresponding to the second communication system is searched, controlling the mobile terminal to reside in the network corresponding to the second communication system, and searching the network again according to the first communication system.
After the S102 is executed, the AS module of the mobile terminal may send the network searching result to the NAS module of the mobile terminal, and the NAS module determines whether to search for the network corresponding to the second communication system according to the network searching result. If so, the NAS module controls the mobile terminal to reside in the network corresponding to the second communication system so as to ensure that the mobile terminal performs the emergency call service in the network corresponding to the second communication system, and does not directly perform network registration on the mobile terminal according to the searched network corresponding to the second communication system.
Because the network searching priority of the second communication system is less than the network searching priority of the first communication system, the second communication system is actually difficult to ensure the optimal service requirement of the mobile terminal, and therefore, in order to ensure the optimal service requirement of the mobile terminal, the method also needs to continue network searching according to the first communication system and determine whether the first communication system recovers the network, so that the mobile terminal returns to the network corresponding to the communication system with higher priority more quickly.
It should be noted that, the network searching is performed again in S103 according to the first communication system, which may be similar to that in S101, and a specific implementation process thereof may be referred to above, and is not described herein again.
The network searching method of the mobile terminal provided by the invention can search the network according to the second communication system with the network searching priority lower than the first communication system under the condition that the network corresponding to the first communication system is not searched, even if the network corresponding to the second communication system is searched, the mobile terminal can be controlled to reside in the network corresponding to the second communication system instead of directly performing network registration according to the searched network corresponding to the second communication system, and the network searching is also performed according to the first communication system, and whether the first communication system recovers the network is determined in time, so that the operations of cell reselection, position updating and the like of the mobile terminal under the condition that the network corresponding to the second communication system is registered and the first communication system recovers the network can be effectively avoided, and the process that the mobile terminal returns to the network corresponding to the higher-priority communication system is effectively shortened, the user experience is improved.
Optionally, the present invention further provides a network searching method for a mobile terminal. Fig. 2 is a flowchart of another network searching method of a mobile terminal according to the present invention. As shown in fig. 2, the searching for a network according to the first communication system in S101 and/or S103 may include:
s201, determining a preset frequency point corresponding to the first communication system.
In S201, it may be determined that a fixed frequency point corresponding to the first communication system in the mobile terminal is preset as the preset frequency point, or the fixed frequency point corresponding to the first communication system obtained in real time from the mobile terminal before network search may be used.
And S202, searching the network on the preset frequency point.
In the network searching method of the mobile terminal, the preset frequency point corresponding to the first communication system is determined first, and network searching is carried out on the preset frequency point, so that the network searching time of the first communication system can be reduced.
Optionally, the determining the preset frequency point corresponding to the first communication system in S201 may include:
and determining the frequency point of the successfully registered network as the preset frequency point.
The frequency point of the successfully registered network is determined as the preset frequency point, and then network searching is carried out on the preset frequency point, so that the success rate of network searching can be improved, the network searching process is effectively shortened, the network searching time is reduced, and the user experience is improved.
Optionally, the present invention further provides a network searching method for a mobile terminal. Fig. 3 is a flowchart of another network searching method for a mobile terminal according to the present invention. As shown in fig. 3, the method for determining that the frequency point at which the network has been successfully registered is the preset frequency point may include:
s301, according to the frequency point information of the successfully registered network, determining the frequency point of the successfully registered network as the preset frequency point.
In S301, the NAS module may determine all frequency points of the network that has been successfully registered according to the frequency point information of the network that has been successfully registered, and select at least one frequency point from all frequency points of the network that has been successfully registered as the preset frequency point.
For example, the NAS module may determine, as the preset frequency point, a frequency point of a successfully registered network that is closest to the current time among all frequency points of the successfully registered network, or a frequency point of the most successful network registration times within a preset time period before the current time. Of course, the preset frequency point may also be determined in other manners, which are only examples, and the present invention is not limited thereto.
Before determining that the frequency point of the successfully registered network is the preset frequency point according to the frequency point information of the successfully registered network in S301, the method may further include:
s301a, obtaining the frequency point information of the successfully registered network stored in the mobile terminal in a preset time period before the current time.
The frequency point information of the successfully registered network stored in the mobile terminal may include: and successfully registering the frequency point information of the network at least once before the current time. The frequency point information of the at least one successful network registration may include at least one of the following: frequency point information of a successfully registered network at the latest time from the current time, frequency point information of a successfully registered network each time in a preset time period before the current time, and the like.
The frequency point information of the successfully registered network may be stored in a device storage space of the mobile terminal and/or a storage space of a Subscriber Identity Module (SIM) card in the mobile terminal.
According to the network searching method of the mobile terminal, the frequency point of the successfully registered network is determined to be the preset frequency point according to the frequency point information of the successfully registered network, so that the access success rate corresponding to the preset frequency point is higher, the network searching success rate is improved, the network searching process is effectively shortened, the network searching time is reduced, and the user experience is improved.
Optionally, the preset frequency point may include at least one frequency point.
The method can search on at least one frequency point corresponding to the first communication system, can effectively shorten the network searching process, reduces the network searching time and simultaneously ensures the network searching success rate.
Optionally, after performing network searching according to the first communication system again in S103, the method may further include:
and if the network corresponding to the first communication system is not searched, performing network registration according to the searched network corresponding to the second communication system.
If the network corresponding to the first communication system is not searched yet, it can be determined that the network corresponding to the first communication system is not recovered yet, and in order to enable the mobile terminal to access the network as early as possible and implement the corresponding network service, network registration can be performed according to the searched network corresponding to the second communication system.
Optionally, after performing network searching according to the first communication system again in S103, the method may further include:
and if the network corresponding to the first communication system is searched, performing network registration according to the searched network corresponding to the first communication system.
If the network is searched to the network corresponding to the first communication system, the network corresponding to the first communication system can be determined to be recovered, network registration can be performed according to the searched network corresponding to the first communication system, the mobile terminal can be enabled to access the network with higher priority as early as possible to realize corresponding network service, the priority of the mobile terminal accessing the network can be ensured, service requirements can be ensured, and user experience can be improved.
Optionally, the present invention further provides a network searching method for a mobile terminal. Fig. 4 is a flowchart of a network searching method for a mobile terminal according to another embodiment of the present invention. As shown in fig. 4, the method may include the following:
s401, determining that the communication system corresponding to the first preferential PLMN is an LTE communication system.
S402, obtaining the frequency point information of the network successfully registered last time before the current time, and determining the frequency point of the network successfully registered as the frequency point corresponding to the LTE communication system according to the frequency point information of the network successfully registered.
And S403, searching the network on the frequency point corresponding to the LTE communication system.
If the network corresponding to the LTE communication system is searched, S410 is continuously executed.
And if the network corresponding to the LTE communication system is not searched, continuing to execute S404-S405.
S404, if the network of the LTE communication system is not searched, the communication system corresponding to the second preferential PLMN is determined to be the UMTS communication system.
S405, searching the network on the frequency point corresponding to the UMTS communication system.
If the network corresponding to the UMTS communication system is searched, S406 is executed.
If the network corresponding to the UMTS communication system is not searched, S407 is executed.
S406, if the network corresponding to the UMTS communication system is searched, the mobile terminal is controlled to reside in the network corresponding to the UMTS communication system, and the network is searched on the frequency point corresponding to the LTE communication system.
If the network corresponding to the LTE communication system is searched, S410 is executed.
If the network corresponding to the LTE communication system is not searched, S412 is executed.
S407, if the network of the UMTS communication system is not searched, determining that the communication system corresponding to the third preferred PLMN is the GSM communication system.
S408, searching the network on the frequency point corresponding to the GSM communication system.
If the network corresponding to the GSM communication system is searched, S409 is executed.
And if the network corresponding to the GSM communication system is not searched, returning to execute the S403-S408.
And S409, searching a network corresponding to the GSM communication system, controlling the mobile terminal to reside in the network corresponding to the GSM communication system, and searching the network on the frequency point corresponding to the LTE communication system again.
If the network corresponding to the LTE communication system is searched, S410 is executed.
If the network corresponding to the LTE communication system is not searched, S411 is executed.
S410, searching the network corresponding to the LTE communication system, and performing network registration on the mobile terminal according to the network corresponding to the searched LTE communication system.
And S411, if the network corresponding to the LTE communication system is not searched, performing network registration on the mobile terminal according to the searched GSM communication system.
And S412, if the network corresponding to the LTE communication system is not searched, performing network registration on the mobile terminal according to the searched UTMS communication system.
In the network searching method of the mobile terminal, the network searching can be carried out according to the network searching priority lower than the UTMS communication system under the condition that the network corresponding to the LTE communication system is not searched, even if the network corresponding to the UTMS communication system is searched, the mobile terminal can be controlled to reside in the network corresponding to the UTMS communication system instead of directly carrying out network registration according to the searched network corresponding to the UTMS communication system, and the network searching is carried out according to the LTE communication system, and whether the LTE communication system recovers the network is determined in time, so that the operations of cell reselection, position updating and the like of the mobile terminal can be effectively avoided under the condition that the network corresponding to the UTMS communication system is registered and the LTE communication system recovers the network, the process that the mobile terminal returns to the network corresponding to the LTE communication system is effectively shortened, and the user experience is improved.
The invention also provides a network searching device of the mobile terminal. The network searching device of the mobile terminal may execute the network searching method described in any one of fig. 1 to 4. Fig. 5 is a schematic structural diagram of a network searching apparatus provided in the present invention. As shown in fig. 5, the network searching apparatus 500 may include:
the AS module 501 is configured to perform network search according to a first communication system, and if a network corresponding to the first communication system is not searched, perform network search according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system.
The NAS module 502 is configured to control the mobile terminal to reside in the network corresponding to the second communication system if the network corresponding to the second communication system is searched.
The AS module 501 is further configured to continue to search for a network according to the first communication system if the network corresponding to the second communication system is searched.
Optionally, the NAS module 502 is further configured to determine a preset frequency point corresponding to the first communication system.
The AS module 501 is specifically configured to search for a network at the preset frequency point.
Optionally, the NAS module 502 is specifically configured to determine that the frequency point where the network has been successfully registered is the preset frequency point.
Optionally, the NAS module 502 is specifically configured to determine, according to the frequency point information of the network that has been successfully registered, that the frequency point of the network that has been successfully registered is the preset frequency point.
Optionally, the NAS module 502 is further configured to, after the AS module 501 searches for a network according to the first communication system, perform network registration according to the searched network corresponding to the second communication system if the network corresponding to the first communication system is not searched.
Optionally, the NAS module 502 is further configured to, after the AS module 501 searches for a network according to the first communication system, perform network registration according to the searched network corresponding to the first communication system if the network corresponding to the first communication system is searched.
Optionally, the first communication system includes: an LTE communication system;
the second communication system includes any one of: WCDMA communication system, UTMS communication system and GSM communication system.
The network searching apparatus provided by the present invention can execute the network searching method described in any one of fig. 1 to fig. 4, and the specific implementation process and beneficial effects thereof are described above, and are not described herein again.
The invention also provides a mobile terminal. Fig. 6 is a schematic structural diagram of a mobile terminal according to the present invention. As shown in fig. 6, the mobile terminal 600 may include: a processor 601 and a memory 602. The processor 601 is connected to a memory 602, and the memory 602 stores program codes.
A processor 601, configured to call the program code stored in the memory 602 to implement the network searching method described in any one of fig. 1 to 4.
The mobile terminal provided by the present invention can execute the network searching method of the mobile terminal described in any one of fig. 1 to fig. 4, and the specific implementation process and beneficial effects thereof are referred to above, and are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. A network searching method of a mobile terminal is characterized by comprising the following steps:
searching a network according to a first communication system;
if the network corresponding to the first communication system is not searched, searching the network according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system;
if the network corresponding to the second communication system is searched, controlling the mobile terminal to reside in the network corresponding to the second communication system, and searching the network again according to the first communication system;
the network searching according to the first communication system includes:
determining a preset frequency point corresponding to the first communication system;
searching the network on the preset frequency point;
the determining the preset frequency point corresponding to the first communication system comprises:
and determining the frequency point of the successfully registered network as the preset frequency point.
2. The method according to claim 1, wherein the determining that the frequency point at which the network has been successfully registered is the preset frequency point comprises:
and determining the frequency point of the successfully registered network as the preset frequency point according to the frequency point information of the successfully registered network.
3. The method according to claim 1, wherein after the network searching is performed again according to the first communication standard, the method further comprises:
and if the network corresponding to the first communication system is not searched, performing network registration according to the searched network corresponding to the second communication system.
4. The method according to claim 1, wherein after the network search is continued according to the first communication standard, the method further comprises:
and if the network corresponding to the first communication system is searched, performing network registration according to the searched network corresponding to the first communication system.
5. The method according to any of claims 1-4, wherein the first communication standard comprises: a Long Term Evolution (LTE) communication system;
the second communication system includes any one of: wideband code division multiple access WCDMA communication system, universal mobile telecommunications system UTMS communication system and global system for mobile communications GSM communication system.
6. A network searching device of a mobile terminal is characterized by comprising:
the access layer AS module is used for searching networks according to a first communication system, and if the network corresponding to the first communication system is not searched, the access layer AS module searches the networks according to a second communication system; the network searching priority of the first communication system is greater than the network searching priority of the second communication system;
the non-access stratum (NAS) module is used for controlling the mobile terminal to reside in the network corresponding to the second communication system if the network corresponding to the second communication system is searched;
the AS module is further used for searching for a network according to the first communication system again if the network corresponding to the second communication system is searched;
the NAS module is further configured to determine a preset frequency point corresponding to the first communication system;
the AS module is specifically used for searching the network on the preset frequency point;
the NAS module is specifically configured to determine that the frequency point at which the network has been successfully registered is the preset frequency point.
7. The apparatus of claim 6,
the NAS module is specifically configured to determine, according to frequency point information of a network that has been successfully registered, that the frequency point of the network that has been successfully registered is the preset frequency point.
8. The apparatus of claim 6,
the NAS module is further configured to, after the AS module searches for a network according to the first communication system again, perform network registration according to the searched network corresponding to the second communication system if the network corresponding to the first communication system is not searched.
9. The apparatus of claim 6,
the NAS module is further configured to, after the AS module searches for a network again according to the first communication system, perform network registration according to the searched network corresponding to the first communication system if the network corresponding to the first communication system is searched.
10. The apparatus according to any of claims 6-9, wherein the first communication standard comprises: a Long Term Evolution (LTE) communication system;
the second communication system includes any one of: wideband code division multiple access WCDMA communication system, universal mobile telecommunications system UTMS communication system and global system for mobile communications GSM communication system.
11. A mobile terminal, comprising: a processor and a memory; the processor is connected with the memory, and the memory stores program codes;
the processor is configured to call the program code stored in the memory to implement the network searching method of the mobile terminal according to any one of claims 1 to 5.
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CN109219046A (en) * 2018-10-08 2019-01-15 中国联合网络通信集团有限公司 Method for switching network and device
CN110677897B (en) * 2019-08-27 2022-05-13 潍坊华瑞网络科技有限公司 Network search control method, terminal and computer readable storage medium
CN111182613B (en) * 2019-12-20 2021-02-02 翱捷科技股份有限公司 Multi-mode mobile terminal and network searching method thereof
CN113748716B (en) * 2020-03-31 2022-10-28 华为技术有限公司 Cell search method, device and system
CN111698744A (en) * 2020-06-23 2020-09-22 广州三星通信技术研究有限公司 Method for terminal to quickly return to preferred network and apparatus using the same
CN114125991B (en) * 2020-08-26 2023-09-08 华为技术有限公司 Network searching method and device under multi-card mode and terminal equipment
CN112235781B (en) * 2020-09-24 2023-03-24 紫光展锐(重庆)科技有限公司 Network registration method, equipment, device and storage medium

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