Wireless network connection management method

Abstract

A wireless network connection management method includes the following steps: when a non-priority user identification module is used to establish a connection with a non-priority wireless network, at least one universal integrated circuit card starts a search timer; in response to a first condition, at least one universal integrated circuit card sends a search command to a wireless communication device, wherein the first condition is when the search timer expires; searching and obtaining a current network status through the wireless communication device, and transmitting a reply message indicating the current network status to at least one universal integrated circuit card; and when the current network status indicates that the signal strength of a priority wireless network is greater than a specific signal strength, at least one universal integrated circuit card notifies and switches to the priority wireless network, and transmits an update command to the wireless communication device.

Description

Technical Field

[0001] The present invention relates to a wireless network connection management method, and more particularly to a wireless network connection management method for a wireless communication device and at least one universal integrated circuit card (UICC). Background Art

[0002] In a multi-user identity module wireless communication device, a plurality of removable universal integrated circuit cards each having a respective user identity module, or an embedded universal integrated circuit card (eUICC) having a plurality of electronic subscriber identity modules (eSIMs), can be used to connect to wireless networks of different telecommunications operators, such as a public land mobile network (PLMN), with different user identities.

[0003] However, when the signal of the current telecommunications operator is poor or there is no network service, the user must manually switch to another user identification through the user interface to connect to another telecommunications operator in order to obtain network service. Alternatively, although under a fall back mechanism, when the signal of the preferred telecommunications operator (such as the one with the lower rate) is poor or there is no network service, another telecommunications operator will be automatically selected to restore the network connection. However, there is currently no regulation on how to return to the originally preferred telecommunications operator (such as returning from a telecommunications operator with a higher rate to a telecommunications operator with a lower rate) after selecting another telecommunications operator under the fall back mechanism.

[0004] In view of this, the prior art needs to be improved. Summary of the invention

[0005] Therefore, the main purpose of the present invention is to provide a wireless network connection management method that can be used for a wireless communication device and at least one universal integrated circuit card.

[0006] The present invention discloses a wireless network connection management method, which is used for a wireless communication device and at least one universal integrated circuit card. The at least one universal integrated circuit card is arranged in the wireless communication device and corresponds to a plurality of user identification modules. The wireless network connection management method comprises the following steps: when a non-priority user identification module among the plurality of user identification modules is used to establish a connection with a non-priority wireless network, the at least one universal integrated circuit card starts a search timer; in response to a first condition, the at least one universal integrated circuit card sends a search command to the wireless communication device, wherein the first condition is when the search timer expires; searching and obtaining a current network status through the wireless communication device, and transmitting a reply message indicating the current network status to the at least one universal integrated circuit card; and when the current network status indicates that the signal strength of a priority wireless network corresponding to a priority user identification module among the plurality of user identification modules is greater than a specific signal strength, the at least one universal integrated circuit card notifies and switches to the priority wireless network, and transmits an update command to the wireless communication device.

[0007] The present invention further discloses a wireless network connection management method, which is used for a wireless communication device and at least one universal integrated circuit card. The at least one universal integrated circuit card is set in the wireless communication device, and the at least one universal integrated circuit card corresponds to a plurality of user identification modules. The wireless network connection management method includes an automatic selection application of the wireless communication device transmitting a measurement information indicating a search for a current network status; and the automatic selection application selects a specific user identification module among the plurality of user identification modules to establish a connection with a corresponding specific wireless network according to the current network status. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a wireless communication device and a universal integrated circuit card according to an embodiment of the present invention.

[0009] Figure 2 It is a schematic diagram of a wireless network connection management process according to an embodiment of the present invention.

[0010] Figure 3A and Figure 3B The diagram is a schematic diagram of the operation of a search timer according to the first embodiment of the present invention.

[0011] Figure 4 For the embodiment of the present invention Figure 1 A schematic diagram of a software architecture of a wireless communication device and a universal integrated circuit card is shown.

[0012] Figure 5 For the embodiment of the present invention Figure 4 A schematic diagram of a wireless network connection management process of the software architecture shown.

[0013] Figure 6 For the embodiment of the present invention Figure 4 FIG. 1 is a schematic diagram of another wireless network connection management process of the software architecture shown.

[0014] Figure 7 For the embodiment of the present invention Figure 4 FIG. 1 is a schematic diagram of another wireless network connection management process of the software architecture shown.

[0015] Description of reference numerals:

[0016] 10: Wireless communication device

[0017] 100: Wireless circuit system

[0018] 102: Baseband processor

[0019] 104: Device processor

[0020] 106: Device memory

[0021] 108: Installation operating system

[0022] 110: Applications

[0023] 112: Universal Integrated Circuit Card

[0024] 114: Universal integrated circuit card memory

[0025] 116: Universal integrated circuit card processor

[0026] 118: Universal Integrated Circuit Card Operating System

[0027] 120: Subscriber Identity Module

[0028] 20,50,60,70: Process

[0029] 200~206,500~510,600~608,700~710: Steps

[0030] 40: Software Architecture

[0031] 400: Data machine layer

[0032] 402: Radio Interface Layer

[0033] 404: Framework layer

[0034] 406: Application layer

[0035] 408: Tracking Unit

[0036] 410: Control unit

[0037] 412: Automatically select application

[0038] 414: Management Service Unit

[0039] 416: Identify service unit

[0040] T1, T2, T3, T4: Time

[0041] PWN: Priority Wireless Network DETAILED DESCRIPTION

[0042] Please refer to Figure 1 , Figure 1 The present invention is a schematic diagram of a wireless communication device 10 and at least one universal integrated circuit card (UICC) 112 according to an embodiment of the present invention. The at least one universal integrated circuit card 112 is electrically connected to the wireless communication device 10 and is disposed in the wireless communication device 10. The wireless communication device 10 includes a wireless circuit system 100, a baseband processor 102, a device processor 104, and a device memory 106. The wireless communication device 10 is a multi-subscriber identity module (SIM) wireless communication device. The wireless circuit system 100 can transmit and receive radio frequency wireless signals with a wireless network (such as a public land mobile network) corresponding to a subscriber identity module. The baseband processor 102 is used for network services and is responsible for managing all radio frequency services that require an antenna. The device memory 106 can store a device operating system 108 and one or more application programs 110. The device processor 104 may provide higher layer functional processing (eg, for an application layer and / or for a transport layer), while the baseband processor 102 may provide lower layer functional processing (eg, for a physical layer, for a media access control layer, and / or for a network layer).

[0043] On the other hand, the wireless communication device 10 further includes at least one universal integrated circuit card 112. The at least one universal integrated circuit card 112 may be a single embedded universal integrated circuit card, including a universal integrated circuit card memory 114 and a universal integrated circuit card processor 116. The universal integrated circuit card memory 114 may store a universal integrated circuit card operating system 118 and a plurality of user identification modules 120. The universal integrated circuit card memory 114 and the universal integrated circuit card processor 116 may enable the universal integrated circuit card operating system 118 to execute within the universal integrated circuit card 112 to manage a plurality of user identification modules 120 (such as a plurality of electronic subscriber identity modules (eSIM)). The device processor 104, the universal integrated circuit card processor 116 and the baseband processor 102 may operate together to enable the wireless communication device 10 to establish a connection with one or more wireless networks and access services on the one or more wireless networks. It is worth noting that Figure 1 It is shown that at least one universal integrated circuit card 112 can be a single embedded universal integrated circuit card, but in fact it can also be implemented by a plurality of removable universal integrated circuit cards each having a respective user identification module, such as dual SIM dual active (DSDA) or dual SIM dual standby (DSDS), but not limited to this. The following description is based on a single embedded universal integrated circuit card.

[0044] The wireless network connection management operation between the wireless communication device 10 and the universal integrated circuit card 112 corresponding to the plurality of SIM cards 120 can be summarized as a wireless network connection management process 20, such as Figure 2 As shown, it includes the following steps:

[0045] Step 200: When a non-priority SIM among the plurality of SIMs 120 is used to establish a connection with a non-priority wireless network, the UIC 112 starts a search timer.

[0046] Step 202: In response to a first condition, the UIC 112 sends a search command to the wireless communication device 10, wherein the first condition is when the search timer expires.

[0047] Step 204 : The wireless communication device 10 searches and obtains a current network status, and transmits a reply message indicating the current network status to the UIC 112 .

[0048] Step 206 : When the current network status indicates that the signal strength of a priority wireless network PWN corresponding to a priority SIM among the plurality of SIMs 120 is greater than a specific signal strength, the UIC 112 notifies and switches to the priority wireless network PWN, and transmits an update command to the SIM wireless communication device 10 .

[0049] First, when a non-priority SIM among the plurality of SIMs 120 is used to establish a connection with a non-priority wireless network (for example, when the signal strength of the priority wireless network PWN is less than a specific signal strength, a fallback mechanism is activated to establish a connection with a non-priority wireless network with a signal strength greater than the specific signal strength, or when the power is turned on, a connection is directly established with the non-priority wireless network that was connected before the power was turned off), the UIC 112 starts a search timer (similar to a high priority public land mobile network search timer, Higher Priority PLMN Search Timer), wherein the search timer can be designed in the Platform ServiceManager responsible for managing ISD-R and ISD-P in the UIC operating system 118. It is worth noting that when the search timer is started for the first time when establishing a connection with a non-priority wireless network, the search timer can be set to have a first time, and when the connection is established with a non-priority wireless network but not the first time to start the search timer, the search timer can be set to have a second time, wherein the first time can be less than or equal to the second time (such as the second time can be a multiple of the first time). In this way, the present invention can quickly switch back to the priority wireless network PWN when a non-priority wireless network is used to establish a connection due to short-term interference, and can reduce the frequency of searching for network status to reduce power consumption when the priority wireless network PWN is out of service for a long time, thereby being more flexible.

[0050] Next, in step 200, when the search timer expires (the first time or the second time expires), the UIC 112 sends a search command (such as the Proactive Command command for the SIM card to instruct the device to perform an action, the command set AT Command for the modem to perform the action to perform the action (+COPS)) to the wireless communication device 10, instructing the wireless communication device 10 to search and obtain a current network status, and transmit a reply message indicating the current network status (such as the message Terminal Response that the device replies to the SIM card command) to the UIC 112, so that in addition to the service status of the non-priority wireless network currently established, the current entire network status can also be obtained. Afterwards, when the current network status indicates that the signal strength of the priority wireless network PWN corresponding to the priority SIM in the plurality of SIMs 120 is greater than a specific signal strength, the UIC 112 notifies and switches to the priority wireless network PWN, and transmits an update command (such as the Refresh Command notification device when the SIM card changes the telecommunications operator) to the wireless communication device 10. On the other hand, when the current network status indicates that the signal strength of the priority wireless network PWN is less than a specific signal strength, the universal integrated circuit card 112 starts the search timer again, and repeats the above operation when the search timer expires. In this way, when establishing a connection with a non-priority wireless network, the present invention can switch back to establishing a connection with the priority wireless network PWN when the search timer expires and the signal of the priority wireless network PWN is strong enough.

[0051] It is worth noting that the main concept of the above embodiment is to start the search timer when establishing a connection with a non-priority wireless network, and search the network status when the search timer expires to determine whether the signal of the priority wireless network PWN is strong enough to switch back to establish a connection with the priority wireless network PWN. Those skilled in the art can make modifications or changes accordingly, but are not limited to this. For example, in the above embodiment, after establishing a connection with a non-priority wireless network, the network status is searched after a first time when the search timer is started for the first time, and the network status is searched after a longer second time when the search timer is started thereafter. However, in other embodiments, the time of the search timer can also be designed in other ways.

[0052] For example, see Figure 3A and Figure 3B , Figure 3A and Figure 3B FIG. 1 is a schematic diagram of the operation of the search timer according to an embodiment of the present invention. Figure 3AAs shown, when the number of times the search timer is started to establish a connection with a non-priority wireless network is less than or equal to a specific number X, the search timer is set to have a time T0 and searches for the network status after expiration. When the number of times the search timer is started to establish a connection with a non-priority wireless network is greater than the specific number X, the search timer is set to have a time T1 and searches for the network status after expiration, wherein time T0 is less than time T1. Next, when the number of times the search timer is started with time T1 to establish a connection with a non-priority wireless network is greater than a specific number Y, the search timer is set to have a time T2 and searches for the network status after expiration, wherein time T1 is less than time T2. In this way, the present invention can switch back to the priority wireless network PWN more quickly when a non-priority wireless network is used to establish a connection due to short-term interference, and can gradually reduce the frequency of searching for the network status in sequence when the priority wireless network PWN cannot be provided for a long time, thereby saving more power.

[0053] On the other hand, Figure 3B As shown, when the time for establishing a connection with a non-priority wireless network is less than or equal to a specific time T3 in each of at least one subsequent cycle, the search timer is set to have a time T0 and searches for the network status after the expiration. When the time for establishing a connection with a non-priority wireless network is greater than the specific time T3 in each cycle, the search timer is not started and the network status is not searched, wherein the length of each cycle is the specific time T3 plus a specific time T4 (i.e., there is a specific time T4 in each cycle where the search timer is not started). In this way, the present invention can have a specific time T4 in each cycle where the search timer is not started and the network status is not searched to save power consumption.

[0054] In addition, please refer to Figure 4 , Figure 4 For the embodiment of the present invention Figure 1 FIG. 4 is a schematic diagram of a software architecture 40 of the wireless communication device 10 and the universal integrated circuit card 112. Figure 4As shown, the wireless communication device 10 includes a modem layer 400, a radio interface layer (RIL) 402, a framework layer 404, and an application layer 406. The modem layer 400 includes a management service unit 414 and an identification service unit 416. The management service unit 414 can manage the user identification module 120 using, for example, a local profile assistant (LPA), and the identification service unit 416 can provide user identification module services such as user identity module services. The modem layer 400 can communicate with the wireless network through a wireless transmission method of modulation and demodulation, such as 2G, 3G, 4G or / and 5G wireless transmission. The radio interface layer 402 is a transition layer for the modem layer 400 to transmit information to the device operating system 108 (such as Android). The framework layer 404 includes a tracking unit 408 (such as a ServiceStateTracker unit) and a control unit 410 (such as a UimLpaService unit). The tracking unit 408 can track the connection status of the data machine layer 400 and obtain the latest network connection status. The control unit 410 can control the user identification module in the universal integrated circuit card 112 for establishing a wireless connection. The user can control the user identification module for establishing a wireless connection through the control unit 410 through the menu on the screen of the wireless communication device 10. In addition, in addition to the above-mentioned existing service unit, the present invention further includes an automatic selection application 412 (such as an AutoSelectProfile application) in the application layer 406. The automatic selection application 412 can transmit a measurement information indicating a search for a current network status, and then select a specific user identification module from a plurality of user identification modules 120 to establish a connection with a corresponding specific wireless network according to the current network status. In this way, the present invention can automatically select a suitable user identification module to establish a connection with a corresponding wireless network according to the current network status.

[0055] In short, in one embodiment, when the signal of the currently serving wireless network is not good, the automatic selection unit 412 searches for network signals according to the plurality of user identification modules 120, and automatically selects the wireless network with the best signal to establish a connection according to the network search result. Figure 5 , Figure 5 For the embodiment of the present invention Figure 4 The software architecture 40 shown in FIG. 4 is a schematic diagram of a wireless network connection management process 50. Figure 5As shown, after the power is turned on in step 500, in step 502, one of the plurality of user identification modules 120 (such as a preset user identification module or the user identification module used before the power is turned off) is first registered with a corresponding wireless network, and then the information of the currently serving wireless network is transmitted to the automatic selection unit 412. Next, in step 504, all user identification modules 120 are read, and a user identification module list notification is transmitted to the automatic selection unit 412. In step 506, when the signal strength of a currently serving wireless network is lower than a specific value (such as the signal strength is at level 0 or 1 listed in Table 1), the automatic selection application 412 transmits a measurement information indicating the search for the current network status. In step 508, after searching (such as performing manual network selection, manual search) and measuring the current network status, a measurement result including the current network status is transmitted to the automatic selection application 412. In step 510, when the current network status in the measurement result indicates that the signal strength of a specific wireless network corresponding to a specific user identification module is higher than the signal strength of the current service wireless network (e.g., the signal strength of the specific wireless network may be the strongest in the current network status), the automatic selection application 510 selects to establish a connection with the specific wireless network and transmits a switching request to the control unit 410, and the control unit 410 then transmits an instruction (e.g., an LPA instruction) to instruct the universal integrated circuit card 112 to switch to the specific user identification module. In this way, when the signal of the current service wireless network is not good, the present invention can automatically search for network signals and automatically select a wireless network with a better signal to establish a connection.

[0056] Table 1 Signal strength level table

[0057] grade GSM / WCDMA CDMA LTE 0 dBm<-109 Ecio<-150 Rsrp>-140, Rssnr>-200, RSSI>63 1 -109<dBm<-103 Ecio>-150 Rsrp>-115,Rssnr>-30,RSSI>0 2 dBm>-103 Ecio>-130 Rsrp>-105, Rssnr>-10, RSSI>5 3 dBm>-97 Ecio>-100 Rsrp>-95, Rssnr>45, RSSI>8 4 dBm>-89 Ecio>-90 Rsrp>-85, Rssnr>130, RSSI>12

[0058] In another embodiment, after the device is turned on, it does not register with any wireless network. The automatic selection unit 412 searches for network signals according to the plurality of user identification modules 120, and automatically selects the wireless network with the best signal to establish a connection according to the network search results. Figure 6 , Figure 6 For the embodiment of the present invention Figure 4 FIG. 4 is a schematic diagram of a wireless network connection management process 60 of the software architecture 40 shown in FIG. Figure 6As shown, after the power is turned on in step 600, all user identification modules 120 are read in step 602, and a user identification module list notification is transmitted to the automatic selection unit 412. In step 604, the automatic selection application 412 transmits a measurement information indicating the search for the current network status. In step 606, after searching (such as performing manual network selection, manual search) and measuring the current network status, a measurement result including the current network status is transmitted to the automatic selection application 412. In step 608, when the current network status in the measurement result indicates that the signal strength of a specific wireless network corresponding to a specific user identification module is the strongest in the current network status, the automatic selection application 412 selects to establish a connection with the specific wireless network and transmits a switching request to the control unit 410, and the control unit 410 then transmits an instruction (such as an LPA instruction) to instruct the universal integrated circuit card 112 to switch to the specific user identification module. In this way, the present invention can automatically search for network signals after powering on and automatically select a wireless network with a better signal to establish a connection.

[0059] In another embodiment, the user can set a priority wireless network through the user interface. When the currently serving wireless network is different from the priority wireless network, the automatic selection application 412 will search the network status at regular intervals. If the signal strength of the priority wireless network is greater than a specific value and is available, the priority wireless network is switched. For details, please refer to Figure 7 , Figure 7 For the embodiment of the present invention Figure 4 FIG. 4 is a schematic diagram of a wireless network connection management process 70 of the software architecture 40 shown in FIG. Figure 7 As shown, in step 700, the user sets a priority user identification module among the plurality of user identification modules 120 to correspond to a priority wireless network (e.g., with a lower rate), and the automatic selection application 412 records the priority wireless network. In step 702, when switching to a non-priority wireless network (e.g., due to reasons such as too low signal strength of the priority wireless network), a current service wireless network change notification is sent to the automatic selection application 412. In step 704, when the automatic selection application 412 learns from the current service wireless network change notification that the current service wireless network is different from the priority wireless network, a search timer is started, wherein the search timer can be set in the automatic selection application 412, and the automatic selection application 412 can be one of the applications 110 in the device storage memory 106.

[0060] In step 706, when the search timer expires, the automatic selection application 412 transmits a measurement message indicating the search for the current network status. In step 708, after searching (such as performing manual network selection, manual search) and measuring the current network status, a measurement result including the current network status is transmitted to the automatic selection application 412. In step 710, when the current network status in the measurement result indicates that the signal strength of the priority wireless network is greater than a specific signal strength and is available, the automatic selection application 412 selects to establish a connection with the priority wireless network and transmits a switching request to the control unit 410, and the control unit 410 then transmits an instruction (such as an LPA instruction) to instruct the universal integrated circuit card 112 to switch to the priority user identification module; on the contrary, when the current network status in the measurement result indicates that the signal strength of the priority wireless network is less than the specific signal strength and is not available, it returns to step 704 and the automatic selection application 412 starts the search timer again. In this way, the present invention can switch back to the priority wireless network for priority use when using a non-priority wireless network to establish a connection.

[0061] In summary, the present invention can quickly switch back to the priority wireless network when a non-priority wireless network is used to establish a connection due to short-term interference, and can reduce the frequency of searching for network status to reduce power consumption when the priority wireless network is unable to provide service for a long time, thereby being more flexible. In addition, the present invention can also automatically select a suitable user identification module to establish a connection with the corresponding wireless network according to the current network status.

[0062] The above descriptions are only preferred embodiments of the present invention. All equivalent changes and modifications made according to the claims of the present invention should fall within the scope of the present invention.

Claims

1. A wireless network connection management method, used for a wireless communication device and at least one universal integrated circuit card, the at least one universal integrated circuit card is arranged in the wireless communication device, and the at least one universal integrated circuit card corresponds to a plurality of user identification modules, the wireless network connection management method comprising: When a non-priority user identification module among the plurality of user identification modules is used to establish a connection with a non-priority wireless network, the at least one universal integrated circuit card starts a search timer, wherein when the non-priority user identification module among the plurality of user identification modules is used to establish a connection with the non-priority wireless network, the step of starting the search timer by the at least one universal integrated circuit card further includes: When the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have a first time, and when the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have a second time, wherein: The first time is less than or equal to the second time; In response to a first condition, the at least one universal integrated circuit card sends a search command to the wireless communication device, wherein the first condition is when the search timer expires; Searching and obtaining a current network status through the wireless communication device, and transmitting a reply message indicating the current network status to the at least one universal integrated circuit card; and When the current network status indicates that the signal strength of a priority wireless network corresponding to a priority SIM among the plurality of SIMs is greater than a specific signal strength, the at least one universal integrated circuit card notifies and switches to the priority wireless network and transmits an update command to the wireless communication device. 2 . The wireless network connection management method as claimed in claim 1 , wherein the at least one universal integrated circuit card is an embedded universal integrated circuit card, and the plurality of user identification modules are a plurality of electronic user identification modules. 3 . The wireless network connection management method as claimed in claim 1 , wherein the at least one universal integrated circuit card is a plurality of detachable universal integrated circuit cards having the plurality of subscriber identity modules.

4. The wireless network connection management method as claimed in claim 1, wherein when the non-priority SIM among the plurality of SIMs is used to establish a connection with the non-priority wireless network, the step of starting the search timer by the at least one universal integrated circuit card comprises: When the signal strength of the priority wireless network is less than the specific signal strength, a fallback mechanism is activated to establish a connection with the non-priority wireless network having a signal strength greater than the specific signal strength.

5. The wireless network connection management method as claimed in claim 1, wherein when the non-priority SIM among the plurality of SIMs is used to establish a connection with the non-priority wireless network, the step of starting the search timer by the at least one universal integrated circuit card comprises: When the computer is turned on, it directly connects to the non-priority wireless network that was connected before the computer was turned off.

6. The wireless network connection management method as claimed in claim 1, further comprising: When the current network status indicates that the signal strength of the priority wireless network is less than the specific signal strength, the at least one universal integrated circuit card starts the search timer again.

7. The wireless network connection management method as claimed in claim 1, wherein when the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have the first time, and when the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have the second time, wherein, The step of the first time being less than or equal to the second time comprises: When the number of times the search timer is started when a connection is established with the non-priority wireless network is less than or equal to a first specific number, the search timer is set to have the first time; when the number of times the search timer is started when a connection is established with the non-priority wireless network is greater than the first specific number, the search timer is set to have the second time, wherein the first time is less than the second time.

8. The wireless network connection management method as claimed in claim 7, further comprising: When the connection is established with the non-priority wireless network and the number of times the search timer is started at the second time is greater than a second specific number, the search timer is set to have a third time, wherein, The second time is shorter than the third time.

9. The wireless network connection management method as claimed in claim 1, wherein when the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have the first time, and when the search timer is started for the first time while establishing a connection with the non-priority wireless network, the search timer is set to have the second time, wherein, The step of the first time being less than or equal to the second time comprises: When the time for establishing a connection with the non-priority wireless network is less than or equal to a first specific time in each of at least one subsequent cycle, the search timer is set to have the first time, and when the time for establishing a connection with the non-priority wireless network is greater than the first specific time in each of the cycles, the search timer is not started, wherein the length of each cycle is the first specific time plus a second specific time.

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