CN109089297B - Network searching method and terminal - Google Patents
Network searching method and terminal Download PDFInfo
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- CN109089297B CN109089297B CN201811280945.8A CN201811280945A CN109089297B CN 109089297 B CN109089297 B CN 109089297B CN 201811280945 A CN201811280945 A CN 201811280945A CN 109089297 B CN109089297 B CN 109089297B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- 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
Abstract
The invention provides a network searching method and a terminal, wherein the method comprises the following steps: receiving rejection signaling sent by network side equipment of a first network; under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list; triggering the terminal to search the cell again; the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses. The embodiment of the invention adds the roaming forbidden list into the tracking area to which the target cell which sends the rejection reason value 12 to the terminal belongs, so that the terminal judges that the target cell is an unsuitable cell, thereby triggering the terminal to search the network again, avoiding the terminal from residing in the target cell for a long time and enabling the terminal to be in an off-line state.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a network searching method and a terminal.
Background
At present, in an LTE (Long Term Evolution ) network, there is a scenario of network registration exception, for example, when a terminal performs a registration request or a service request in the network or is in a connected state, a network side device returns a rejection signaling carrying a rejection reason value of 12 to the terminal, where the rejection reason value 12 indicates that a rejection reason is that a cell is a non-allowed Tracking area (Tracking area not allowed).
As explained in section 3.2 of the 3GPP (3rd Generation Partnership Project) 23.122 specification, for a terminal that may only obtain normal service in a specific area, the network may reject the terminal access using a reject cause value of 12 when the terminal attempts to acquire normal service in a cell that does not have authorized service. Correspondingly, the terminal adds the tracking area to which the cell without authorized service belongs to a local service forbidden area list (list of forbidden tracking areas for regional provision of service).
As explained by 3GPP 36.304, a cell in the local service forbidden area list is still considered by the access stratum to be a suitable cell. According to section 5.5.1.3.5 of the 3GPP 24.301 specification, the terminal needs to set an EU3ROAMING NOT ALLOWED (EU3ROAMING NOT ALLOWED) state, and enter an unregistered-restricted SERVICE (EMM-registered-limited-SERVICE) state, the terminal still resides in the cell in the local SERVICE forbidden area list, and the network can only provide restricted SERVICEs for the terminal, such as emergency telephone SERVICE.
After receiving a rejection signaling carrying a rejection reason value of 12 sent by a network side device, the terminal executes according to the protocol specification, an access layer does not trigger cell selection by itself, a non-access layer does not trigger network searching again, and if a cell signal without authorized service does not meet a cell reselection criterion, the terminal stays in the cell for a long time, so that the terminal is in an off-line state.
Disclosure of Invention
The embodiment of the invention provides a network searching method and a terminal, aiming at solving the problem that in the prior art, after the terminal receives a rejection signaling which is sent by network side equipment and carries a rejection reason value of 12, the terminal can stay in a cell without authorized service for a long time, so that the terminal is in an off-line state.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a network search method, which is applied to a terminal, and the method includes:
receiving rejection signaling sent by network side equipment of a first network;
under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list;
triggering the terminal to search the cell again;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses.
In a second aspect, an embodiment of the present invention provides a terminal, where the terminal includes:
a receiving module, configured to receive a rejection signaling sent by a network-side device of a first network;
a control module, configured to add a tracking area to which a target cell belongs to a roaming forbidden list when a reject cause value in the reject signaling is a reject cause value 12;
the triggering module is used for triggering the terminal to search the cell again;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses.
In a third aspect, an embodiment of the present invention provides another terminal, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the network search method.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps of the network search method.
In the embodiment of the invention, the network searching method receives a rejection signaling sent by network side equipment of a first network; under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list; triggering the terminal to search the cell again; the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses. In this way, the tracking area to which the target cell that sends the rejection cause value 12 to the terminal belongs is added into the roaming prohibition list, so that the terminal determines that the target cell is an unsuitable cell, thereby triggering the terminal to search for a network again, avoiding the terminal residing in the target cell for a long time and enabling the terminal to be in an off-line state.
Drawings
Fig. 1 is a flowchart of a network searching method provided by an embodiment of the present invention;
FIG. 2 is a second flowchart of a network searching method according to an embodiment of the present invention;
fig. 3 is one of the structural diagrams of a terminal provided in an embodiment of the present invention;
fig. 4 is a second structural diagram of a terminal according to an embodiment of the present invention;
fig. 5 is a third structural diagram of a terminal according to an embodiment of the present invention;
fig. 6 is a fourth structural diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a fifth structural diagram of a terminal according to an embodiment of the present invention;
fig. 8 is a sixth structural view of a terminal according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The PLMN mentioned in the embodiment of the invention is Public Land Mobile Network.
Referring to fig. 1, fig. 1 is a flowchart of a network searching method provided in an embodiment of the present invention, where the network searching method is applied to a terminal, and as shown in fig. 1, the method includes the following steps:
The network side device of the first network may be a network side device (e.g., a base station) corresponding to a target cell in the first network, where the target cell may be a cell to which the terminal requests to access, or may be a cell to which the terminal currently accesses. The cell corresponding to a base station is the coverage area of the base station.
The reject signaling may be an Attach request reject (Attach request) signaling, a Tracking area location update reject (Tracking area update reject) signaling, a Service request reject (Service request) signaling, or a Detach request (Detach request).
And when the rejection signaling is attachment request rejection signaling, the target cell is a cell which the terminal requests to access. Before receiving the Attach request rejection signaling sent by the network side device of the first network, the terminal also initiates an Attach request (Attach request) to the network side device of the first network. Specifically, when the terminal does not access any cell, if the terminal needs to request access to a target cell, the terminal may initiate an attach request to the target cell, and if the target cell rejects the attach request of the terminal, send an attach request rejection signaling to the terminal. It should be noted that, the initiating, by the terminal, a request to the target cell according to the embodiment of the present invention may be understood as the initiating, by the terminal, a request to a network side device (for example, a base station) corresponding to the target cell, and the receiving, by the terminal, a signaling sent by the target cell may be understood as receiving a signaling sent by the network side device corresponding to the target cell.
And when the rejection signaling is tracking area position updating rejection signaling, the target cell is a cell currently accessed by the terminal. Before receiving the Tracking area location update rejection signaling sent by the network side device of the first network, the terminal also sends a Tracking area location update request (Tracking area update request) to the network side device of the first network.
And when the rejection signaling is service request rejection signaling, the target cell is a cell currently accessed by the terminal. Before receiving the Service request rejection signaling sent by the network side device of the first network, the terminal also sends a Service request (Service request) to the network side device of the first network.
And when the rejection signaling is a network side detach request, the target cell is a cell currently accessed by the terminal. It can be understood that, when the terminal is already successfully registered in the target cell and is in a connected state, it may need to be disconnected from the terminal for some reasons, and at this time, the network-side device corresponding to the target cell sends a network-side detach request to the terminal.
In this step, when the reject reason value in the reject signaling is the reject reason value 12, the terminal adds the tracking area to which the target cell belongs to a roaming prohibition list (list of forbidden tracking areas for roaming), so that the terminal may determine that the target cell is not a suitable cell for the terminal, thereby triggering the terminal to search for a network again.
It is to be understood that, in some embodiments of the present invention, the terminal may delete the roaming prohibition list when the terminal is rebooted, or when the airplane mode is turned on or off, or when a SIM (Subscriber identity Module) card is inserted or removed. The terminal may also set an effective duration for the roaming barring list, for example, if a roaming barring list establishment duration exceeds a first preset duration, or a roaming barring list exceeds a second preset duration without being updated, the terminal may delete the roaming barring list. The terminal may also set an effective duration for the tracking areas in the roaming barring list, for example, if the time for a tracking area to join the roaming barring list exceeds a third preset duration, the terminal may remove the tracking area from the roaming barring list. It should be noted that the first preset time period, the second preset time period, and the third preset time period may be the same time period or different time periods, which is not specifically limited in this embodiment of the present invention.
In this step, after adding the tracking area to which the target cell belongs to the roaming prohibition list, triggering the terminal to search the cell again, so that the terminal determines that the target cell is an unsuitable cell, thereby searching suitable cells except for the cell corresponding to the tracking area in the roaming prohibition list.
In this embodiment of the present invention, the terminal may be a mobile terminal, for example: mobile phones, Tablet Personal computers (Tablet Personal Computer), Laptop computers (Laptop Computer), Personal Digital Assistants (PDA), Mobile Internet Devices (MID) or Wearable devices (Wearable Device), digital cameras, and the like; or may be a fixed terminal such as a computer or the like.
In this embodiment, the network search method receives a rejection signaling sent by a network side device of a first network; under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list; triggering the terminal to search the cell again; the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses. In this way, the tracking area to which the target cell that sends the rejection cause value 12 to the terminal belongs is added into the roaming prohibition list, so that the terminal determines that the target cell is an unsuitable cell, thereby triggering the terminal to search for a network again, avoiding the terminal residing in the target cell for a long time and enabling the terminal to be in an off-line state.
Referring to fig. 2, fig. 2 is a second flowchart of a network searching method provided in the embodiment of the present invention, where the method is applied to a terminal, as shown in fig. 2, and includes the following steps:
Step 201 and step 202 are the same as step 101 and step 102 in the embodiment shown in fig. 1 of the present invention, and are not described again here.
In this step, the terminal searches for a first cell that meets a preset condition, where the preset condition at least includes that the signal strength is greater than a preset signal strength and the tracking area to which the terminal belongs is not in the roaming prohibition list. In some embodiments of the present invention, the predetermined condition may further include that a network list (forbidden PLMN list) is not present in a USIM (Universal Subscriber Identity Module), and/or the signal quality is greater than a predetermined signal quality.
The terminal may determine, according to whether the network to which the target cell belongs is the home network of the terminal, in which network a first cell satisfying the preset condition is searched. And the home network of the terminal is an operator network to which the SIM card of the terminal belongs.
Specifically, the terminal may determine whether a network to which the target cell belongs is a home PLMN of the terminal, and if the network to which the target cell belongs is the home PLMN of the terminal, the terminal searches for a first cell that satisfies the preset condition in the first network or the second network; conversely, when the network to which the target cell belongs is different from the home network of the terminal, the terminal searches for the first cell satisfying the preset condition in the second network. The first network and the second network are different types of networks, and specifically, the first network may be a generation network that is newer than the second network, and in an embodiment of the present invention, the first network is a 4G network (fourth generation mobile communication network), and the second network is a 2G network (second generation mobile communication network) or a 3G network (third generation mobile communication network). In other embodiments of the present invention, the first network may also be a future mobile communication network (for example, a 5G network, etc.), and this is not specifically limited in this embodiment of the present invention.
The manner of the terminal determining whether the network to which the target cell belongs is the home network of the terminal may include: judging whether a Country Code (MCC) of a Network identification Code (PLMN identity) carried in the system information of the target cell is matched with a Country Code carried by an SIM card of the terminal, and judging whether a Network number (Mobile Network Code, MNC) of the Network identification Code carried in the system information of the target cell is matched with a Network number carried by the SIM card of the terminal.
And under the condition that the country code of the network identification code carried in the system information of the target cell is matched with the country code carried by the SIM card of the terminal, and the mobile number of the network identification code carried in the system information of the target cell is matched with the network number carried by the SIM card of the terminal, the terminal determines that the network to which the target cell belongs is the home network of the terminal. On the contrary, in the case that the country code of the network identification code carried in the system information of the target cell does not match the country code carried by the SIM card of the terminal, or in the case that the mobile number of the network identification code carried in the system information of the target cell does not match the network number carried by the SIM card of the terminal, the terminal determines that the network to which the target cell belongs is not the same as the home network of the terminal.
In this step, after the terminal searches for the first cell meeting the preset condition, the terminal initiates an attach request to the first cell. In this way, the terminal can search for the first cell meeting the preset condition and initiate the attach request, and does not stay in the target cell sending the rejection reason value 12 to the terminal for a long time, thereby avoiding causing the terminal to be in an off-line state.
It should be noted that the first cell may accept the attach request of the terminal, so that the terminal may successfully attach to the first cell. The first cell may not accept the attach request of the terminal, and the network side device corresponding to the first cell sends a rejection signaling to the terminal under the condition that the first cell does not accept the attach request of the terminal, and if the first cell is a cell in the first network, the process proceeds to step 201, and under the condition, the first cell is a target cell.
In this embodiment, the network search method receives a rejection signaling sent by a network side device of a first network; adding a tracking area to which a target cell belongs to a roaming forbidden list under the condition that a rejection reason value in the rejection signaling is a rejection reason value 12, wherein the target cell is a cell to which the terminal requests to access or a cell to which the terminal currently accesses; searching a first cell meeting preset conditions, wherein the preset conditions at least comprise that the signal intensity is greater than the preset signal intensity and the tracking area to which the tracking area belongs is not in the roaming forbidden list; and initiating an attach request to the first cell if the first cell is searched. Therefore, the method can trigger the terminal to search the network again after receiving the rejection signaling carrying the rejection reason value 12, so as to avoid the terminal residing in the target cell for a long time and enable the terminal to be in the off-line state.
Optionally, the searching for the first cell meeting the preset condition includes:
searching a first cell meeting the preset condition in the first network or a second network under the condition that the network to which the target cell belongs is the home network of the terminal;
under the condition that the network to which the target cell belongs is different from the home network of the terminal, searching a first cell meeting the preset condition in the second network;
the home network of the terminal is an operator network to which a Subscriber Identity Module (SIM) card of the terminal belongs, and the first network and the second network are different types of networks.
In this embodiment, when the network to which the target cell belongs is a home network of the terminal, the terminal searches for a first cell that satisfies the preset condition in the first network or the second network; conversely, when the network to which the target cell belongs is different from the home network of the terminal, the terminal searches for the first cell that satisfies the preset condition in the second network.
For example, when the first network is a 4G network and the second network is a 2G network or a 3G network, the terminal may preferentially search for the first cell satisfying the preset condition in the 4G network when the network to which the target cell belongs is a home network of the terminal, and further search for the first cell satisfying the preset condition in the 2G network or the 3G network when the first cell satisfying the preset condition is not searched in the 4G network. Under the condition that the network to which the target cell belongs is different from the home network of the terminal, it is indicated that the terminal may not support 4G network access, or a signal of 4G network access is weak, and the terminal directly searches for a first cell meeting the preset condition in a 2G or 3G network, that is, when the network to which the target cell belongs is different from the home network of the terminal, the 4G network access function of the terminal is turned off.
Therefore, when the terminal supports the access of the first network, the terminal can be preferentially searched for the cell in the first network, the terminal can be provided with the optimal network service, and the terminal can be searched for the cell in the second network when the terminal possibly does not support the access of the first network or the signal of the access of the first network is weak, so that the problem that the terminal frequently requests to access the cell in the first network and is rejected to cause network drop or slow network residence speed can be avoided. In addition, the search efficiency can be improved.
Optionally, in a case that the network to which the target cell belongs is a home network of the terminal, searching for a first cell that satisfies the preset condition in the first network or the second network includes:
judging whether the terminal is successfully registered in the first network or not under the condition that the network to which the target cell belongs is the home network of the terminal;
and searching a first cell meeting the preset condition in the first network under the condition that the terminal is successfully registered in the first network.
In this embodiment, when the network to which the target cell belongs is the home network of the terminal, the terminal further determines whether the terminal has successfully registered in the first network, and when the terminal has successfully registered in the first network, it indicates that the terminal supports first network access, and the terminal searches for a first cell that satisfies the preset condition in the first network, so that it is ensured that an optimal network service is provided for the terminal. For example, when the first network is a 4G network, if the terminal successfully registers in the 4G network, it indicates that the terminal supports the 4G network, and searches for a first cell meeting the preset condition in the 4G network.
It should be noted that, in this embodiment, when there are a plurality of cells that satisfy the preset condition in the 4G network, the terminal may sequentially attempt to access, and when access of all the cells that satisfy the preset condition in the 4G network fails, the terminal searches for a first cell that satisfies the preset condition in the 2G or 3G network. Namely, the 4G access function of the terminal is closed under the condition that the terminal sequentially tries to access all the cells meeting the preset conditions in the 4G network and the access fails.
In the embodiment of the present invention, a preset flag (e.g., an LTE _ accepted flag) may be set to indicate whether the terminal successfully registers in the first network. Specifically, in the case that the value of the preset flag bit is a first preset value (e.g., "1"), it is determined that the terminal has successfully registered in the first network; and determining that the terminal is not successfully registered in the first network under the condition that the value of the preset zone bit is a second preset value (such as 0).
Optionally, after receiving the rejection signaling sent by the network side device of the first network, the method further includes:
adding 1 to the number of attempts of the access channel of the terminal when the rejection reason value in the rejection signaling is a rejection reason value 12;
after the determining whether the terminal is successfully registered in the first network, the method further includes:
under the condition that the terminal is not successfully registered in the first network, judging whether the number of times of trying to access a channel of the terminal is smaller than a preset threshold value or not;
searching a first cell meeting the preset condition in the first network under the condition that the number of attempts of accessing a channel by the terminal is less than the preset threshold;
and searching a first cell meeting the preset condition in the second network under the condition that the number of times of attempts of accessing the channel by the terminal is greater than or equal to the preset threshold value.
In this embodiment, in the case that the reject cause value in the reject signaling is a reject cause value 12, the number of attempts to access the channel by the terminal is increased by 1. In a case that the terminal is not successfully registered in the first network, it is described that the terminal may not be able to acquire the service of the first network, but since it cannot be determined whether the terminal is able to acquire the service of the first network at this time, in this embodiment, an attempt number threshold of an access channel (i.e., an attempt number of a preset access channel) is set, where the attempt number of the preset access channel is an attempt number (MAX attempt counter) of the terminal attempting to access a maximum access channel of the first network. Under the condition that the terminal is not successfully registered in the first network, judging whether the number of times of attempts of an access channel of the terminal is smaller than a preset threshold value or not, and under the condition that the number of times of attempts of the access channel of the terminal is smaller than the preset threshold value, searching a first cell meeting the preset condition in the first network; conversely, in the case where the number of attempts to access the channel by the terminal is greater than or equal to the preset threshold, searching for a first cell that satisfies the preset condition within the second network. Therefore, the problem that the terminal frequently requests to access the cell in the first network and is rejected, so that the network is dropped or the network-staying speed is low can be avoided.
It should be noted that, when the number of attempts of the access channel is greater than or equal to the number of attempts of the preset access channel, if the reject reason value in the reject signaling is the reject reason value 12, the number of attempts of the access channel of the terminal is not increased by 1. In case the terminal restarts, or turns on or off the airplane mode, or inserts or extracts the SIM, or successfully accesses the cell of the first network, the number of attempts to access the channel may be reset, i.e. cleared. In this embodiment of the present invention, the number of attempts to access the maximum channel may be set to 5.
Optionally, the searching for the first cell meeting the preset condition in the first network includes:
scanning the cells in the first network in a full frequency mode, and judging whether a first cell meeting the preset condition exists in the first network;
after determining whether there is a first cell satisfying the preset condition in the first network, the method further includes:
and under the condition that no first cell meeting the preset condition exists in the first network, searching for the first cell meeting the preset condition in the second network.
In this embodiment, the searching for the first cell meeting the preset condition in the first network is specifically to perform full frequency scanning on the cells in the first network, determine whether there is a first cell meeting the preset condition in the first network, and if there is a first cell meeting the preset condition in the first network, the terminal initiates an attach request to the first cell meeting the preset condition in the first network; and under the condition that no first cell meeting the preset condition exists in the first network, the terminal searches for the first cell meeting the preset condition in the second network. In this way, even if the first cell suitable for access is searched for the terminal in the second network when the first cell suitable for access is not searched for in the first network, the terminal is prevented from staying in the target cell for a long time and being in an off-line state.
Referring to fig. 3, fig. 3 is a structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 3, a terminal 300 includes:
a receiving module 301, configured to receive a rejection signaling sent by a network side device of a first network;
a control module 302, configured to add the tracking area to which the target cell belongs to the roaming forbidden list when the reject cause value in the reject signaling is reject cause value 12;
a triggering module 303, configured to trigger the terminal to re-search for a cell;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses.
Optionally, referring to fig. 4, fig. 4 is a second structural diagram of the terminal provided in the embodiment of the present invention, and as shown in fig. 4, the terminal triggering module 303 includes:
a search submodule 3031, configured to search for a first cell that meets a preset condition;
a request submodule 3032, configured to initiate an attach request to the first cell when the first cell is searched;
the preset conditions at least comprise that the signal strength is greater than the preset signal strength and the tracking area to which the tracking area belongs is not in the roaming forbidden list.
Optionally, referring to fig. 5, fig. 5 is a third structural diagram of the terminal according to the embodiment of the present invention, and as shown in fig. 5, the search submodule 3031 includes:
a first searching unit 30311, configured to search, in the first network or the second network, for a first cell that meets the preset condition when the network to which the target cell belongs is a home network of the terminal;
a second searching unit 30312, configured to search, in the second network, for a first cell that meets the preset condition when a network to which the target cell belongs is different from a home network of the terminal;
the home network of the terminal is an operator network to which a Subscriber Identity Module (SIM) card of the terminal belongs, and the first network and the second network are different types of networks.
Optionally, referring to fig. 6, fig. 6 is a fourth structural diagram of the terminal according to the embodiment of the present invention, as shown in fig. 6, the first search unit 30311 includes:
a first determining subunit 303111, configured to determine whether the terminal has successfully registered in the first network;
a first searching subunit 303112, configured to search, in the first network, for a first cell that meets the preset condition when the terminal is successfully registered in the first network.
Optionally, referring to fig. 7, fig. 7 is a fifth structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 7, the terminal 300 further includes:
a counting module 304, configured to add 1 to the number of attempts of accessing the channel by the terminal if the reject reason value in the reject signaling is a reject reason value 12;
the first search unit 30311 further includes:
a second determining subunit 303113, configured to determine whether the number of attempts of accessing the channel by the terminal is less than a preset threshold value if the terminal has not successfully registered in the first network
A second searching subunit 303114, configured to search, in the first network, for a first cell that meets the preset condition when the number of attempts to access the channel by the terminal is smaller than the preset threshold;
a third searching subunit 303115, configured to search, in the second network, for a first cell that meets the preset condition, when the number of attempts to access the channel by the terminal is greater than or equal to the preset threshold.
Optionally, the searching for the first cell meeting the preset condition in the first network by the first searching subunit 303112 or the second searching subunit 303114 specifically includes:
scanning the cells in the first network in a full frequency mode, and judging whether the cells meeting the preset conditions exist in the first network or not;
referring to fig. 8, fig. 8 is a sixth structural diagram of a terminal according to an embodiment of the present invention, as shown in fig. 8, the first search unit 30311 further includes:
a fourth searching subunit 303116, configured to, in a case where there is no first cell that satisfies the preset condition in the first network, search for a first cell that satisfies the preset condition in the second network.
In this embodiment, the terminal receives a rejection signaling sent by a network side device of a first network; under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list; triggering the terminal to search the cell again; the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses. In this way, the terminal adds the roaming prohibition list to the tracking area to which the target cell sending the rejection cause value 12 belongs, so that the terminal judges that the target cell is an unsuitable cell, thereby triggering the terminal to search for the network again, avoiding the terminal residing in the target cell for a long time and enabling the terminal to be in an off-line state.
Fig. 9 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, and as shown in fig. 9, the terminal 900 includes, but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, and a power supply 911. Those skilled in the art will appreciate that the terminal configuration shown in fig. 9 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
Wherein, the processor 910 is configured to:
receiving rejection signaling sent by network side equipment of a first network;
under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list;
triggering the terminal to search the cell again;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses.
Optionally, the triggering, performed by the processor 910, the terminal to search for a cell again includes:
searching a first cell meeting a preset condition;
initiating an attach request to the first cell if the first cell is searched;
the preset conditions at least comprise that the signal strength is greater than the preset signal strength and the tracking area to which the tracking area belongs is not in the roaming forbidden list.
Optionally, the searching for the first cell meeting the preset condition by the processor 910 includes:
searching a first cell meeting the preset condition in the first network or a second network under the condition that the network to which the target cell belongs is the home network of the terminal;
under the condition that the network to which the target cell belongs and the home network of the terminal, searching a first cell meeting the preset condition in the second network;
the home network of the terminal is an operator network to which a Subscriber Identity Module (SIM) card of the terminal belongs, and the first network and the second network are different types of networks.
Optionally, the searching, by the processor 910, for a first cell meeting the preset condition in the first network or the second network, in a case that the network to which the target cell belongs is a home network of the terminal, includes:
judging whether the terminal is successfully registered in the first network or not under the condition that the network to which the target cell belongs is the home network of the terminal;
and searching a first cell meeting the preset condition in the first network under the condition that the terminal is successfully registered in the first network.
Optionally, after the processor 910 performs receiving the rejection signaling sent by the network-side device of the first network, the following steps may also be implemented:
adding 1 to the number of attempts of the access channel of the terminal when the rejection reason value in the rejection signaling is a rejection reason value 12;
the processor 910, after determining whether the terminal is successfully registered in the first network, may further implement the following steps:
under the condition that the terminal is not successfully registered in the first network, judging whether the number of times of trying to access a channel of the terminal is smaller than a preset threshold value or not;
searching a first cell meeting the preset condition in the first network under the condition that the number of attempts of accessing a channel by the terminal is less than the preset threshold;
and searching a first cell meeting the preset condition in the second network under the condition that the number of times of attempts of accessing the channel by the terminal is greater than or equal to the preset threshold value.
Optionally, the searching for the first cell meeting the preset condition in the first network, performed by the processor 910, includes:
scanning the cells in the first network in a full frequency mode, and judging whether a first cell meeting the preset condition exists in the first network;
after the processor 910 determines whether there is a first cell in the first network that satisfies the preset condition, the following steps may also be implemented:
and under the condition that no first cell meeting the preset condition exists in the first network, searching for the first cell meeting the preset condition in the second network.
In the embodiment of the invention, a terminal receives a rejection signaling sent by network side equipment of a first network; under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list; triggering the terminal to search the cell again; the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses. In this way, the terminal adds the roaming prohibition list to the tracking area to which the target cell sending the rejection cause value 12 belongs, so that the terminal judges that the target cell is an unsuitable cell, thereby triggering the terminal to search for the network again, avoiding the terminal residing in the target cell for a long time and enabling the terminal to be in an off-line state.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 901 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 910; in addition, the uplink data is transmitted to the base station. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 901 can also communicate with a network and other devices through a wireless communication system.
The terminal provides wireless broadband internet access to the user through the network module 902, such as helping the user send and receive e-mails, browse web pages, access streaming media, and the like.
The audio output unit 903 may convert audio data received by the radio frequency unit 901 or the network module 902 or stored in the memory 909 into an audio signal and output as sound. Also, the audio output unit 903 may also provide audio output related to a specific function performed by the terminal 900 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 903 includes a speaker, a buzzer, a receiver, and the like.
The input unit 904 is used to receive audio or video signals. The input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics processor 9041 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 906. The image frames processed by the graphic processor 9041 may be stored in the memory 909 (or other storage medium) or transmitted via the radio frequency unit 901 or the network module 902. The microphone 9042 can receive sounds and can process such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 901 in case of the phone call mode.
Terminal 900 can also include at least one sensor 905, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 9061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 9061 and/or backlight when the terminal 900 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 905 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described in detail herein.
The display unit 906 is used to display information input by the user or information provided to the user. The Display unit 906 may include a Display panel 9061, and the Display panel 9061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 907 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 907 includes a touch panel 9091 and other input devices 9072. The touch panel 9091, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 9091 (e.g., operations by a user on or near the touch panel 9091 using a finger, a stylus, or any other suitable object or accessory). The touch panel 9091 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 910, receives a command from the processor 910, and executes the command. In addition, the touch panel 9091 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, a surface acoustic wave, and the like. The user input unit 907 may include other input devices 9072 in addition to the touch panel 9091. Specifically, the other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, and the like), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 9091 may be overlaid on the display panel 9061, and when the touch panel 9091 detects a touch operation on or near the touch panel 9091, the touch panel is transmitted to the processor 910 to determine the type of the touch event, and then the processor 910 provides a corresponding visual output on the display panel 9061 according to the type of the touch event. Although in fig. 9, the touch panel 9091 and the display panel 9061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 9091 and the display panel 9061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.
The interface unit 908 is an interface through which an external device is connected to the terminal 900. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. Interface unit 908 can be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within terminal 900 or can be used to transmit data between terminal 900 and external devices.
The memory 909 may be used to store software programs as well as various data. The memory 909 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 909 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 910 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 909 and calling data stored in the memory 909, thereby integrally monitoring the terminal. Processor 910 may include one or more processing units; preferably, the processor 910 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 910.
The terminal 900 can also include a power supply 911 (e.g., a battery) for powering the various components, and preferably, the power supply 911 can be logically connected to the processor 910 via a power management system such that the functions of managing charging, discharging, and power consumption are performed via the power management system.
In addition, the terminal 900 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides a terminal, including a processor 910, a memory 909, and a computer program stored in the memory 909 and capable of running on the processor 910, where the computer program is executed by the processor 910 to implement each process of the foregoing network search method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing network search method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A network searching method is applied to a terminal, and is characterized in that the method comprises the following steps:
receiving rejection signaling sent by network side equipment of a first network;
under the condition that the rejection reason value in the rejection signaling is a rejection reason value 12, adding a tracking area to which a target cell belongs into a roaming forbidden list;
triggering the terminal to search the cell again;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses;
the triggering the terminal to search for the cell again includes:
searching a first cell meeting a preset condition;
initiating an attach request to the first cell if the first cell is searched;
the preset conditions at least comprise that the signal strength is greater than the preset signal strength and the tracking area to which the tracking area belongs is not in the roaming forbidden list;
the searching for the first cell meeting the preset condition comprises the following steps:
searching a first cell meeting the preset condition in the first network or a second network under the condition that the network to which the target cell belongs is the home network of the terminal;
under the condition that the network to which the target cell belongs is different from the home network of the terminal, searching a first cell meeting the preset condition in a second network;
the home network of the terminal is an operator network to which a Subscriber Identity Module (SIM) card of the terminal belongs, and the first network and the second network are different types of networks;
and the terminal removes the tracking area from the roaming forbidden list when determining that the time length of the tracking area added into the roaming forbidden list exceeds the preset time length.
2. The method according to claim 1, wherein, in the case that the network to which the target cell belongs is a home network of the terminal, searching for the first cell that satisfies the preset condition in the first network or the second network comprises:
judging whether the terminal is successfully registered in the first network or not under the condition that the network to which the target cell belongs is the home network of the terminal;
and searching a first cell meeting the preset condition in the first network under the condition that the terminal is successfully registered in the first network.
3. The network searching method according to claim 2, wherein after receiving the rejection signaling sent by the network-side device of the first network, the method further comprises:
adding 1 to the number of attempts of the access channel of the terminal when the rejection reason value in the rejection signaling is a rejection reason value 12;
after the determining whether the terminal is successfully registered in the first network, the method further includes:
under the condition that the terminal is not successfully registered in the first network, judging whether the number of times of trying to access a channel of the terminal is smaller than a preset threshold value or not;
searching a first cell meeting the preset condition in the first network under the condition that the number of attempts of accessing a channel by the terminal is less than the preset threshold;
and searching a first cell meeting the preset condition in the second network under the condition that the number of times of attempts of accessing the channel by the terminal is greater than or equal to the preset threshold value.
4. The method according to claim 2 or 3, wherein the searching for the first cell meeting the preset condition in the first network comprises:
scanning the cells in the first network in a full frequency mode, and judging whether a first cell meeting the preset condition exists in the first network;
after determining whether there is a first cell satisfying the preset condition in the first network, the method further includes:
and under the condition that no first cell meeting the preset condition exists in the first network, searching for the first cell meeting the preset condition in the second network.
5. A terminal, characterized in that the terminal comprises:
a receiving module, configured to receive a rejection signaling sent by a network-side device of a first network;
a control module, configured to add a tracking area to which a target cell belongs to a roaming forbidden list when a reject cause value in the reject signaling is a reject cause value 12;
the triggering module is used for triggering the terminal to search the cell again;
the target cell is a cell which the terminal requests to access or a cell which the terminal currently accesses;
the trigger module includes:
the search submodule is used for searching a first cell meeting a preset condition;
a request submodule, configured to initiate an attach request to the first cell when the first cell is searched;
the preset conditions at least comprise that the signal strength is greater than the preset signal strength and the tracking area to which the tracking area belongs is not in the roaming forbidden list;
the search submodule includes:
a first searching unit, configured to search, in the first network or the second network, for a first cell that satisfies the preset condition, when a network to which the target cell belongs is a home network of the terminal;
a second searching unit, configured to search, in the second network, for a first cell that satisfies the preset condition when a network to which the target cell belongs is different from a home network of the terminal;
the home network of the terminal is an operator network to which a Subscriber Identity Module (SIM) card of the terminal belongs, and the first network and the second network are different types of networks;
and the terminal removes the tracking area from the roaming forbidden list when determining that the time length of the tracking area added into the roaming forbidden list exceeds the preset time length.
6. The terminal of claim 5, wherein the first search unit comprises:
a first determining subunit, configured to determine, when a network to which the target cell belongs is a home location of the terminal, whether the terminal has successfully registered in the first network;
and the first searching subunit is configured to search, in the first network, for a first cell that meets the preset condition when the terminal is successfully registered in the first network.
7. The terminal of claim 6, further comprising:
a counting module, configured to add 1 to the number of attempts of accessing the channel by the terminal when the reject cause value in the reject signaling is a reject cause value 12;
the first search unit further includes:
a second determining subunit, configured to determine whether the number of attempts of accessing the channel by the terminal is less than a preset threshold value, when the terminal is not successfully registered in the first network;
a second searching subunit, configured to search, in the first network, a first cell that meets the preset condition when the number of attempts to access the channel by the terminal is smaller than the preset threshold;
a third searching subunit, configured to search, in the second network, for a first cell that meets the preset condition when the number of attempts to access the channel by the terminal is greater than or equal to the preset threshold.
8. The terminal according to claim 6 or 7, wherein the searching for the first cell meeting the preset condition in the first network by the first searching subunit or the second searching subunit specifically includes:
scanning the cells in the first network in a full frequency mode, and judging whether the cells meeting the preset conditions exist in the first network or not;
the first search unit further includes:
a fourth searching subunit, configured to search, in the second network, for a first cell that satisfies the preset condition when there is no first cell that satisfies the preset condition in the first network.
9. A terminal, characterized in that it comprises a processor, a memory, a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the network search method according to any one of claims 1 to 4.
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| US20220159551A1 (en) * | 2019-02-23 | 2022-05-19 | Huawei Technologies Co., Ltd. | Network Search Method and Terminal Device |
| CN111278003B (en) * | 2020-01-21 | 2023-02-24 | 青岛海信移动通信技术股份有限公司 | Position updating processing method and mobile terminal |
| CN111314949B (en) * | 2020-02-18 | 2023-10-20 | 闻泰通讯股份有限公司 | Network access method, device, electronic equipment and storage medium |
| CN111586799B (en) * | 2020-04-17 | 2022-08-16 | 展讯半导体(成都)有限公司 | Network residing method, system, electronic device, storage medium and communication terminal |
| CN113038593B (en) * | 2021-02-04 | 2023-08-18 | 维沃移动通信有限公司 | Connection establishment method, device and user equipment |
| CN114040493B (en) * | 2021-11-30 | 2023-02-28 | 哲库科技(北京)有限公司 | Data bearer establishing method, device, terminal and storage medium |
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