Cell access method and device, electronic equipment and medium

Abstract

The invention relates to a cell access method and device, electronic equipment and a medium. The method for accessing the cell comprises the following steps: determining that the signal quality of a serving cell of a terminal does not meet a first condition, improving a threshold value of a second condition, determining that the state of the terminal is updated from a first network type service state to a first state, and updating from the first state to a second network type service state, determining a first cell, and releasing the prohibited access of the first cell, and accessing the first cell. According to the invention, the threshold value of the condition that the terminal initiates the RRC connection to the serving cell can be improved, so that the number of times that the terminal initiates the RRC connection to the serving cell is reduced, and the condition that the serving cell is forbidden to access due to frequent RRC connection failure is avoided; besides, after the terminal returns to the area where the wireless signal is well received, the prohibited access of the cell where the access is prohibited can be relieved, so that the terminal can quickly access the wireless network and provide network service for the user in time, and the use experience of the user is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and in particular, to a method, apparatus, electronic device, and medium for accessing a cell. Background Art

[0002] After a terminal accesses a wireless network and establishes a wireless connection with a network device, the wireless connection may be interrupted or the terminal may even be unable to camp on the original wireless network when the terminal moves to some areas.

[0003] If the terminal cannot quickly access the original wireless network when moving out of the area, it will seriously affect the user experience. Summary of the Invention

[0004] To overcome the problems in the related art, the present disclosure provides a method, apparatus, electronic device, and medium for accessing a cell.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a method for accessing a cell, which is applied to a terminal and includes:

[0006] Determine that the signal quality of the serving cell of the terminal does not meet a first condition, and the serving cell provides a first network mode service;

[0007] Increase the threshold of a second condition, where the second condition is a condition for the terminal to initiate a Radio Resource Control (RRC) connection to the serving cell;

[0008] Determine that the state of the terminal is updated from a first network mode service state to a first state, and then from the first state to a second network mode service state, where the first network mode is higher than the second network mode;

[0009] Determine a first cell that has been prohibited from access and provides a first network mode service;

[0010] Remove the prohibition on access to the first cell;

[0011] Access the first cell.

[0012] In some embodiments, the first state is an out-of-network service state; or

[0013] The first state is a third network mode service state, where the third network mode is lower than the first network mode and the second network mode.

[0014] In some embodiments, the determining that the signal quality of the serving cell of the terminal does not meet the first condition includes:

[0015] Monitor the first measurement result within a first time period, where the first measurement result is the measurement result of the signal quality parameter of the serving cell by the terminal;

[0016] If each measurement result in the first measurement result is less than the first threshold corresponding to the signal quality parameter, determine that the signal quality of the serving cell does not meet the first condition.

[0017] In some embodiments, the monitoring the first measurement result within the first time period includes:

[0018] After determining that the signal quality of the serving cell is less than a second threshold and there is at least one RRC connection failure within a second time period, monitor the first measurement result within the first time period.

[0019] In some embodiments, the second condition includes at least one second threshold, and the second threshold corresponds to the signal quality parameter.

[0020] In some embodiments, the raising the threshold of the second condition includes:

[0021] Raise the threshold in the second condition with a fixed step size.

[0022] In some embodiments, the raising the threshold of the second condition includes:

[0023] Raise the threshold in the second condition with an increasing step size.

[0024] In some embodiments, the determining the first cell includes:

[0025] Monitor the second measurement result, where the second measurement result is the measurement result of the neighboring cell by the terminal, and the neighboring cell provides the first network mode service;

[0026] Determine the first cell that meets the access condition from the neighboring cells according to the measurement result.

[0027] In some embodiments, the method further includes:

[0028] Record a first cell set, where the first cell set includes at least one cell that has served as the serving cell of the terminal and the signal quality of the at least one cell does not meet the first condition;

[0029] Record a second cell set, where the second cell set includes at least one cell that is in a prohibited access state for the terminal and the at least one cell belongs to the first cell set;

[0030] The determining the first cell includes:

[0031] Determine that the first cell belongs to the second cell set.

[0032] In some embodiments, access to the first cell is prohibited due to a first reason, where the first reason is multiple RRC connection failures.

[0033] According to a second aspect of the embodiments of the present disclosure, there is provided a device for accessing a cell, which is applied to a terminal and includes:

[0034] A first determination module, configured to determine that the signal quality of the serving cell of the terminal does not meet a first condition, and the serving cell provides a first network mode service;

[0035] A first processing module, configured to increase the threshold of a second condition, where the second condition is the condition for the terminal to initiate a radio resource control (RRC) connection to the serving cell;

[0036] A second determination module, configured to determine that the state of the terminal is updated from a first network mode service state to a first state, and then from the first state to a second network mode service state, where the first network mode is higher than the second network mode;

[0037] A third determination module, configured to determine a first cell, where the first cell has been prohibited from access and provides a first network mode service;

[0038] An unlocking module, configured to lift the prohibition on access to the first cell;

[0039] An access module, configured to access the first cell.

[0040] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, including:

[0041] A processor;

[0042] A memory for storing instructions executable by the processor;

[0043] Wherein, the processor is configured to execute the method for accessing a cell as described in the first aspect of the present disclosure.

[0044] According to a fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of an electronic device, enabling the electronic device to execute the method for accessing a cell as described in the first aspect of the present disclosure.

[0045] Adopting the above method of the present disclosure has the following beneficial effects: The present disclosure can increase the threshold of the condition for the terminal to initiate an RRC connection to the serving cell, thereby reducing the number of times the terminal initiates an RRC connection to the serving cell and avoiding the serving cell from being prohibited from access due to frequent RRC connection failures. Additionally, the present disclosure can also lift the prohibition on the prohibited cell after the terminal returns to an area with good wireless signal reception, enabling the terminal to quickly access the wireless network and promptly provide network services to users, so as to enhance the user experience.

[0046] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0048] Figure 1 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment.

[0049] Figure 2 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment.

[0050] Figure 3 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment.

[0051] Figure 4 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment.

[0052] Figure 5 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment.

[0053] Figure 6 is a block diagram of a device for accessing a cell shown according to an exemplary embodiment.

[0054] Figure 7 is a block diagram of an electronic device shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0056] In daily life, there are often various areas that affect the reception of wireless signals, such as basements, underground garages, tunnels, etc. After the terminal moves into these areas, it may disconnect from the currently accessed wireless network (the wireless network corresponds to a serving cell), and then register for network services in a wireless network with a network mode lower than that of the serving cell. In the case of extremely poor signals, it may even directly enter the out-of-service state. After the terminal leaves the area that affects wireless signal reception (hereinafter referred to as the above-mentioned area), for example, when the terminal returns to an area with good wireless signal reception such as the ground, the terminal can reconnect to a wireless network with the same network mode level as that of the serving cell. For the convenience of understanding, the following is a specific example: For example, when the terminal is in an area with good wireless signal reception, it accesses the NR (New Radio) network. After the terminal moves into the above-mentioned area, it may disconnect from the NR network, and then register for network services in the 2G (2th Generation Mobile Communication Technology) or 3G (3th Generation Mobile Communication Technology) network, or directly enter the OOS (Out Of Service) state. After the terminal leaves the above-mentioned area, the terminal will reconnect to the NR network. Among them, the NR network can also be called the 5G (5th Generation Mobile Communication Technology) network.

[0057] Before the terminal enters the above-mentioned area, it will establish an RRC (Radio Resource Control) connection with the cell corresponding to the currently accessed wireless network. For example, the cell corresponding to the NR network is the NR cell, and the cell corresponding to the 4G (4th Generation Mobile Communication Technology) network is the LTE (Long Term Evolution) cell. After the terminal enters the above-mentioned area, as the signal gradually weakens, in order to keep the wireless service uninterrupted, the terminal will continuously initiate RRC connections to the serving cell. When the signal weakens to a certain extent and multiple RRC connection attempts fail, the serving cell will be set to be prohibited from access. Correspondingly, after the serving cell is prohibited from access, the terminal will continue to search for whether there is a serving cell that can provide network services and continuously initiate RRC connections. Continuing like this, other serving cells around the original serving cell may also be prohibited from access.

[0058] Therefore, when the terminal leaves the above-mentioned area, even if the terminal can find a cell that meets the access conditions, when applying to access the cell, it may be prohibited from accessing the cell, resulting in the terminal being unable to access the cell. In order to provide network services for the terminal, the terminal can only give up accessing the cell and search for other cells that meet the access conditions again. This will prolong the time for the terminal to successfully access the network, so that the network services cannot be provided to the user in time, resulting in a poor user experience.

[0059] To solve the above problems, the present disclosure provides a method for accessing a cell, which is applied to a terminal. The method for accessing a cell in the present disclosure determines that the signal quality of the serving cell of the terminal does not meet the first condition, and correspondingly increases the threshold of the second condition. That is, after detecting that the signal quality of the serving cell of the terminal does not meet the first condition, the present disclosure can correspondingly increase the threshold of the condition for the terminal to initiate an RRC connection to the serving cell, thereby reducing the number of times the terminal initiates an RRC connection to the serving cell and avoiding the serving cell being prohibited from accessing due to frequent RRC connection failures.

[0060] The method for accessing a cell in the present disclosure determines that the state of the terminal is updated from the first network mode service state to the first state, and from the first state to the second network mode service state, thereby determining that the terminal has left the above-mentioned area and returned to an area with good wireless signal reception. Subsequently, after determining that the terminal has returned to an area with good wireless signal reception, the first area to be accessed is determined, and the prohibition of access to the first cell is lifted, enabling the terminal to successfully access the first cell. That is, the present disclosure can also lift the prohibition of access to the prohibited cell after the terminal returns to an area with good wireless signal reception, so that the terminal can quickly access the wireless network and provide network services to the user in time, thereby improving the user experience. Therefore, the present disclosure can shorten the network access time of the terminal from two aspects, so that the terminal can quickly access the wireless network.

[0061] It should be noted that the present disclosure is particularly applicable to application scenarios such as when the terminal enters and exits the basement, underground garage, tunnel, etc.

[0062] An exemplary embodiment of the present disclosure provides a method for accessing a cell, which is applied to a terminal. The terminal can specifically be an intelligent device such as a mobile phone, a tablet computer, a notebook, an intelligent robot, an intelligent wearable device, etc. In addition, various hardware resources are provided on the terminal, as well as an energy storage device that provides electrical energy for the operation of various hardware resources.

[0063] An embodiment of the present disclosure provides a method for accessing a cell. Figure 1 It is a flowchart of a method for accessing a cell shown according to an exemplary embodiment. As Figure 1 shown, the method for accessing a cell shown in this embodiment includes:

[0064] S101. Determine that the signal quality of the serving cell of the terminal does not meet the first condition.

[0065] S102. Increase the threshold of the second condition.

[0066] S103. Determine that the state of the terminal is updated from the first network mode service state to the first state, and then from the first state to the second network mode service state.

[0067] S104. Determine the first cell.

[0068] S105. Lift the access prohibition on the first cell.

[0069] S106. Access the first cell.

[0070] Among them, the serving cell provides the first network mode service. In this embodiment, there is no limitation on what specific network service the first network mode service is. For example, the first network mode service can be 5G network service. However, it should be noted that the first network mode should be higher than the second network mode. For example, the second network mode can be 4G or 3G etc. which are lower than 5G.

[0071] In step S101, there is no limitation on the type of the terminal in this embodiment. For example, the terminal can be an SA terminal. Since SA is a networking type of 5G, correspondingly, the SA terminal can also be expressed as a 5G terminal.

[0072] RSRP (Reference Signal Receiving Power) is one of the key parameters and physical layer measurement requirements that can represent the network signal strength in the network. It is the average value of the signal power received on all RE (resource particles) carrying the reference signal within a certain symbol. Generally, the value range of RSRP is -44dBm to -140dBm, and the larger the value of RSRP, the higher the signal strength. For example, when the value of RSRP is -65dBm, it indicates that the signal strength of the current cell is relatively good. At this time, whether indoors or outdoors, the terminal can initiate various high-rate data services. Another example is that when the value of RSRP is -95dBm, it indicates that the signal strength of the current cell is relatively poor. At this time, if the terminal initiates a service indoors, it may fail. If the terminal can initiate a call service outdoors, but the call success rate is low and the call drop rate is high.

[0073] SNR (Signal to Noise Ratio) represents the signal-to-noise ratio, which is the ratio of the intensity of the received useful signal to the intensity of the received interference signal (noise).

[0074] That is to say, both RSRP and SNR can represent the signal quality of a cell. When the RSRP is larger, it indicates that the signal quality of the cell is better. Similarly, when the SNR is larger, it means that the strength of the useful signal is greater than that of the interference signal. Correspondingly, the signal quality of the cell is also better. In addition, there are many signal quality parameters in the related art that can be used to represent the signal quality of a cell, such as parameters like RSSI (Received Signal Strength Indicator), RSRQ (Reference Signal Receiving Quality), etc.

[0075] Therefore, in step S101, in one example, the signal quality parameter of the serving cell can be measured, and the signal quality of the serving cell can be determined based on the measurement result of the signal quality parameter of the serving cell, and then it can be determined whether the signal quality of the serving cell meets the first condition.

[0076] In one example, it can be determined whether the signal quality of the serving cell meets the first condition based on the measurement result of the RSRP. For example, the measured RSRP is compared with a preset value, and it is determined whether the signal quality of the serving cell meets the first condition according to the magnitude relationship between the two. For example, when the RSRP is greater than or equal to the first preset value, it is determined that the signal quality of the serving cell meets the first condition; for another example, when the RSRP is less than the first preset value, it is determined that the signal quality of the serving cell does not meet the first condition.

[0077] In another example, similar to the method of determining whether the signal quality of the serving cell meets the first condition by using the RSRP, it can also be determined whether the signal quality of the serving cell meets the first condition based on the measurement result of the SNR. For example, when the SNR is greater than or equal to the second preset value, it is determined that the signal quality of the serving cell meets the first condition; for another example, when the SNR is less than the second preset value, it is determined that the signal quality of the serving cell does not meet the first condition.

[0078] In another example, it can also be determined whether the signal quality of the serving cell meets the first condition from two aspects of the measurement results of the RSRP and the SNR. For example, when the RSRP is greater than or equal to the first preset value and the SNR is greater than or equal to the second preset value, it is determined that the signal quality of the serving cell meets the first condition; for another example, when the RSRP is less than the first preset value and the SNR is less than the second preset value, it is determined that the signal quality of the serving cell does not meet the first condition; for another example, when the RSRP is greater than or equal to the first preset value and the SNR is less than the second preset value, it is determined that the signal quality of the serving cell does not meet the first condition; for another example, when the RSRP is less than the first preset value and the SNR is greater than or equal to the second preset value, it is determined that the signal quality of the serving cell does not meet the first condition.

[0079] As can be seen from the above, the first condition is a condition related to good signal quality. When the signal quality of the serving cell does not meet the first condition, it indicates that the signal quality of the serving cell is relatively poor.

[0080] Correspondingly, in this embodiment, other signal quality parameters can also be compared with preset values to determine whether the signal quality of the serving cell meets the first condition. For the sake of brevity, it will not be elaborated in this embodiment.

[0081] In step S102, when the signal quality of the serving cell of the terminal does not meet the first condition, it indicates that in the current state, the result of the terminal initiating an RRC connection to the serving cell is very likely to be a failure. If no measures are taken, according to the implementation method of related technologies, after the terminal fails to initiate an RRC connection to the serving cell, it will initiate an RRC connection to the serving cell again, and so on in a loop. After multiple RRC connection failures, the terminal will add the serving cell to the list of prohibited access, resulting in the serving cell being prohibited from access. Therefore, certain measures are needed to solve the problem that the serving cell is prohibited from access due to poor signal quality and frequent RRC connection failures.

[0082] In one example, the second condition can be the condition for the terminal to initiate an RRC connection to the serving cell. Correspondingly, the problem that the serving cell is prohibited from access due to poor signal quality and frequent RRC connection failures can be solved by increasing the threshold of the condition for the terminal to initiate an RRC connection to the serving cell. For example, in the current state, the threshold of the condition for the terminal to initiate an RRC connection to the serving cell is Q, and the result of the terminal initiating an RRC connection to the serving cell is a failure. If the size of the threshold Q is not increased, the terminal will continuously initiate an RRC connection to the serving cell. Undoubtedly, if the serving cell still meets the first condition of signal quality, the results of multiple RRC connections initiated by the terminal to the serving cell will surely be failures. However, when the size of the threshold Q is increased, the state / signal quality (or other parameters) of the serving cell will temporarily not meet the threshold Q. Correspondingly, the serving cell will no longer be the object for the terminal to initiate an RRC connection, and the terminal will not initiate an RRC connection to the serving cell again temporarily. Only when the state / signal quality (or other parameters) of the serving cell meets the threshold Q will the terminal initiate an RRC connection to the serving cell again. In this way, through the above process, the number of times the terminal initiates an RRC connection to the serving cell can be effectively reduced.

[0083] In step S103, in one example, the first state may be the service state of the third network mode. It should be noted that the third network mode should be lower than the first network mode and the second network mode. Therefore, the relationship of their levels can be the third network mode < the second network mode < the first network mode. It can be seen that the first network mode is the network mode with the highest network mode among the three. Therefore, the wireless network corresponding to the first network mode should be the wireless network with the best network service. For example, if the service state of the first network mode is the NR service state and the service state of the second network mode is the LTE service state, then the third network service state can be the 2G service state, the 3G service state, etc.

[0084] In another example, the first state may also be the state of exiting the network service, where the state of exiting the network service may also refer to the OOS state, which means that the terminal has no network service at this time.

[0085] Among them, the reasons for the state of the terminal being the state of exiting the network service usually may be as follows: 1. Geographical location. When the terminal is located in a remote area or an area where signals are difficult to penetrate, such as a basement / underground garage, the terminal may have no service. This is because the signals in these areas are very weak and cannot meet the communication needs of the terminal. 2. Network congestion. When the network is congested, the terminal may also have no service. For example, in the city center or at the site of a large event, due to a large number of terminals using the network simultaneously during peak hours, the network may become extremely congested, resulting in the terminal having no service. 3. Terminal failure: A failure of the terminal itself may also cause no service. For example, if there is a problem with the SIM card slot of the terminal, the SIM card cannot work properly, resulting in the terminal having no service. 4. Network operator failure: In addition to problems with the terminal itself, the network service provider may also have failures, resulting in the terminal being unable to connect to the network normally. For example, the server of the service provider may experience a temporary outage, resulting in the operator having no service for the terminal. Combining the application scenario of this embodiment, it can be obtained that the reason for the state of the terminal in this embodiment being the state of exiting the network service is that the signal quality is poor due to the geographical location, thus unable to meet the communication needs of the terminal.

[0086] However, regardless of what service state the first state represents, the network mode of the first state is lower than the first network mode.

[0087] During the actual communication process, when the terminal is in an area with good reception of wireless signals, the network mode of the wireless network providing network services to the terminal is higher than that when the terminal is in an area where wireless signal reception is affected. And after the terminal moves from the area where wireless signal reception is affected back to the area with good reception of wireless signals, the network mode of the wireless network providing network services to the terminal will be higher than that when the terminal is in the area where wireless signal reception is affected. Therefore, the change rule of the network mode of the terminal during this process is high - low - high. Corresponding to the above-mentioned first network mode, second network mode and first state, it can be seen that the update of the terminal's state from the first network mode service state to the first state indicates that the terminal enters the area where wireless signal reception is affected from the area with good reception of wireless signals, and the update of the terminal's state from the first state to the second network mode service state indicates that the terminal returns from the area where wireless signal reception is affected to the area with good reception of wireless signals. Therefore, the update of the terminal's state also means the change of the area where the terminal is located. And when the terminal's state is updated from the first state to the second network mode service state, it can be considered that the terminal has returned to the area with good reception of wireless signals. Therefore, the area where the terminal is located can be further determined through the state of the terminal in step S103, so as to determine the cell that provides the first network mode service that the terminal can attempt to access to continue the subsequent steps S104 - S106.

[0088] In addition, it should be noted that after the terminal returns to the area with good reception of wireless signals, it will first monitor whether there is an accessible cell that provides the first network mode service. If all the nearby cells that provide the first network mode service are prohibited from access, the terminal will first access the cell that provides the second network mode service. That is, the terminal's state is updated from the first state to the second network mode service state. For example, the terminal first detects whether there is an accessible NR cell. If all the nearby NR cells are prohibited from access, the terminal will first access the LTE cell. In addition, if the terminal monitors an accessible cell that provides the first network mode service, the terminal will directly access this cell to achieve a faster transmission speed and lower network latency during the communication process. At the same time, when the terminal directly accesses this cell, it realizes that the terminal accesses the first cell that provides the first network mode service. Therefore, the steps shown in S104 - S106 will not be continued. For example, if the terminal monitors an accessible NR cell, it will directly access this NR cell and use the 5G network service.

[0089] In step S104, combining the content described in the above step S103, it can be known that after all the cells that provide the first network mode service are prohibited from access, the terminal will first access the cell that provides the second network mode service. However, in order to provide a better user experience, it is necessary to monitor the neighboring cells of the cell that provides the second network mode service to determine whether there is a cell that provides the first network mode service.

[0090] Therefore, in step S104, it is necessary to determine a first cell that provides services of the first network standard. Therefore, the first cell is a cell that provides services of the first network standard.

[0091] Referring to the content in step S103, it can be obtained that if an accessible cell providing the first network standard service is monitored, the terminal will directly access the cell. Therefore, if the terminal determines the first cell from the neighboring cells of the cell providing the second network standard service, it means that the first cell is in a prohibited access state at this time.

[0092] During the communication process, there are various reasons why a cell is prohibited from access. For example, a base station may actively disable certain cells according to its own needs, so that the cell is prohibited from access. For another example, a base station may actively disable certain cells according to certain preset rules, so that the cell is prohibited from access. For another example, multiple wireless link connection establishment failures result in the cell being prohibited from access.

[0093] It should be noted that if the cell is prohibited from access due to reasons such as the base station's needs based on the higher layer / its own needs, certain preset rules, etc., the terminal does not have the authority to lift the prohibited access. If the cell is prohibited from access due to reasons such as poor signal, multiple RRC connection failures, etc., the terminal has the authority to lift the prohibited access. In order to continue with the subsequent steps, this disclosure will not discuss the case where the terminal does not have the authority to lift the prohibition, but only discuss the case where the terminal can lift the prohibited access to the cell.

[0094] In one example, it can be determined that the first cell is prohibited from access due to a first reason, wherein the first reason may be multiple RRC establishment failures. For example, the terminal initiates multiple RRC connections to the first cell, but all of the multiple RRC connections fail to connect. At this time, the first cell will be prohibited from access due to multiple RRC connection failures.

[0095] In another example, the first reason may also be other reasons that can be lifted by the terminal except for multiple RRC establishment failures. The specific type of the reason is not limited or elaborated in this embodiment.

[0096] Assuming that the first reason for the first cell being prohibited from access is not multiple RRC connection failures or other reasons that can lift the prohibition by other terminals, the process can return to steps S102-S103 and re-determine the first cell until the reason for the first cell being prohibited is the first reason.

[0097] In step S105, in the above step S104, it is recorded that although the first cell is prohibited from access, the first reason for the first cell to be prohibited from access is that the cell is prohibited from access due to multiple RRC connection failures, or other reasons that can be lifted by other terminals. Regardless of the type of the first reason, as long as the first cell is prohibited from access due to the first reason, the terminal has the permission to lift the prohibition of accessing the first cell. Therefore, the terminal can directly lift the prohibition of accessing the first cell, enabling the first cell to be accessed normally.

[0098] By the terminal lifting the prohibition of accessing the first cell, the first cell that was prohibited from access can return to the normal usage state, enabling the terminal to switch from the cell providing the second network mode service to the first cell, achieving the rapid network return of the terminal.

[0099] In step S106, when the terminal accesses the first cell, it indicates that the terminal has successfully connected to the network corresponding to the first network mode. For example, the 5G network. And after accessing the first cell, the terminal can quickly return to the network after returning to the area with good wireless signal reception, thereby enhancing the user experience.

[0100] In this embodiment, after detecting that the signal quality of the serving cell of the terminal does not meet the first condition, the threshold of the condition for the terminal to initiate an RRC connection to the serving cell can be correspondingly increased, thereby reducing the number of times the terminal initiates an RRC connection to the serving cell and avoiding the serving cell from being prohibited from access due to frequent RRC connection failures; in addition, in this embodiment, when the terminal returns to the area with good wireless signal reception, the prohibition of access to the prohibited cell can be lifted, enabling the terminal to quickly access the wireless network and provide network services to the user in a timely manner, so as to enhance the user's usage experience.

[0101] The present disclosure embodiment provides a method for accessing a cell. Figure 2 It is a flowchart of a method for accessing a cell shown according to an exemplary embodiment. As Figure 2 shown, the method for accessing a cell shown in the present disclosure includes:

[0102] S201. After determining that the signal quality of the serving cell is less than the second threshold and there is at least one RRC connection failure within the second time period, listen to the first measurement result within the first time period.

[0103] S202. If each measurement result in the first measurement result is less than the first threshold corresponding to the signal quality parameter, it is determined that the signal quality of the serving cell does not meet the first condition.

[0104] S203. Increase the threshold of the second condition.

[0105] S204. Determine that the state of the terminal is updated from the first network mode service state to the first state, and then from the first state to the second network mode service state.

[0106] S205. Determine the first cell.

[0107] S206. Lift the prohibition on accessing the first cell.

[0108] S207. Access the first cell.

[0109] Among them, steps S203 - S207 are the same as steps S102 - S106 in the above embodiment, and will not be elaborated here.

[0110] In step S201, in practical applications, it is very easy to have a situation where the signal quality of the serving cell does not meet the first condition once or a few times. For example, the first measurement result monitored this time indicates that the signal quality of the serving cell does not meet the first condition, but the first measurement result monitored next time indicates that the signal quality of the serving cell meets the first condition. In this case, if it is considered that the signal quality of the serving cell does not meet the first condition based on only one first measurement result, it is very easy to generate misjudgment and cause the serving cell to be misidentified as a cell with poor signal quality.

[0111] Therefore, for greater accuracy, the first measurement results within a period of time can be monitored, and based on the multiple first measurement results monitored within this period of time, it is determined that the signal quality of the serving cell does not meet the first condition. Among them, the first measurement result can refer to the measurement result of the signal quality parameters of the serving cell by the terminal. For example, a monitoring timer is set, the monitoring timer is started, and the measurement results of the signal quality parameters of the serving cell by the terminal within a duration of T are monitored.

[0112] It should be noted that during normal communication, frequently monitoring the first measurement results within the first duration will undoubtedly add useless measurements, and will also occupy the memory of the terminal and increase the consumption of the terminal. Therefore, in this embodiment, a corresponding trigger condition is set for monitoring the first measurement results within the first duration, and only after meeting this trigger condition, the monitoring of the first measurement results is carried out. The trigger condition can be that it is determined that the signal quality of the serving cell is less than the second threshold, and there is at least one RRC connection failure within the second duration.

[0113] Correspondingly, the second duration can be a period of time defined by the monitoring timer, and the signal quality can be determined through signal quality parameters.

[0114] In one example, when the signal quality parameter is RSRP, the signal quality refers to RSRP. That is, when the RSRP is less than the second threshold and there is at least one RRC connection failure within the second time period, the second measurement result is monitored.

[0115] In another example, when the signal quality parameter is SNR, the signal quality refers to SNR. That is, when the SNR is less than the second threshold and there is at least one RRC connection failure within the second time period, the second measurement result is monitored.

[0116] In another example, when the signal quality parameters are RSRP and SNR, RSRP and SNR can be jointly used as the signal quality, and RSRP and SNR are compared with the corresponding second thresholds. When the RSRP is less than the second threshold, the SNR is less than the second threshold, and there is at least one RRC connection failure within the second time period, the second measurement result is monitored.

[0117] In another example, when the signal quality parameters are RSRP and SNR, a parameter can be determined by RSRP and SNR. This parameter is jointly affected by RSRP and SNR. For example, this parameter can be the weighted value after the operation of RSRP and SNR, etc. When this parameter is less than the second threshold and there is at least one RRC connection failure within the second time period, the second measurement result is monitored.

[0118] In step S202, multiple first measurement results are monitored within the first time period. For example, the first measurement result A is monitored within the first time period. Among them, the first measurement result A includes the measurement result of the signal quality parameter A1 and the measurement result of the signal quality parameter B1. Among them, the signal quality parameter A1 and the signal quality parameter B1 can be different types of signal quality parameters. For example, the signal quality parameter A1 is RSRP and the signal quality parameter B1 is SNR.

[0119] After multiple first measurement results are monitored, the multiple first measurement results are judged to determine whether the signal quality of the serving cell meets the first condition. In one example, when each measurement result in the first measurement result is less than the first threshold corresponding to the signal quality parameter, it can be determined that the signal quality of the serving cell does not meet the first condition. For example, when the measurement result of the signal quality parameter A1 is less than the first threshold corresponding to the signal quality parameter and the measurement result of the signal quality parameter B1 is less than the first threshold corresponding to the signal quality parameter, it can be determined that the signal quality of the serving cell does not meet the first condition. As long as any one of the signal quality parameter A1 and the signal quality parameter B1 is greater than or equal to the first threshold corresponding to the signal quality parameter, it cannot be determined that the signal quality of the serving cell does not meet the first condition.

[0120] In this embodiment, a precondition (trigger condition) for monitoring is given, that is, the signal quality of the serving cell is less than a second threshold, and there is at least one RRC connection failure within a second time period. Through this precondition, the terminal can monitor in advance the serving cells whose signal quality may not meet the first condition and may be prohibited from accessing, so as to obtain more parameters related to the serving cell, and then accurately determine whether there is a problem with the signal quality of the serving cell and whether the serving cell may be prohibited from accessing. Moreover, by setting the first time period, the signal quality of the serving cell can be determined more comprehensively and accurately. By comparing each measurement result in the first measurement result with the corresponding first threshold, and only when each measurement result is less than the corresponding first threshold, it is determined that the signal quality of the serving cell does not meet the first condition, so that the serving cell with the actual signal quality not meeting the first condition can be determined, reducing the misjudgment rate of the serving cell.

[0121] Figure 3 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment. As Figure 3 shown, the method for accessing a cell shown in this embodiment includes:

[0122] S301. Determine that the signal quality of the serving cell of the terminal does not meet the first condition.

[0123] S302. Increase the threshold in the second condition with a fixed step size.

[0124] S303. Increase the threshold in the second condition with an increasing step size.

[0125] S304. Determine that the state of the terminal is updated from the first network mode service state to the first state, and from the first state to the second network mode service state.

[0126] S305. Determine the first cell.

[0127] S306. Lift the prohibition on accessing the first cell.

[0128] S307. Access the first cell.

[0129] Among them, steps S301, S304 - S307 are the same as steps S101, S103 - S106 in the above embodiment, and will not be elaborated here. Moreover, steps S302 and S303 are alternative choices, that is, either increase the threshold in the second condition with a fixed step size or increase the threshold in the second condition with an increasing step size.

[0130] It should be noted that the second condition includes at least one second threshold, where the second threshold corresponds to a signal quality parameter. Since the signal quality parameter includes at least one of RSRP and SNR, there should also be two corresponding second thresholds, namely the second threshold corresponding to RSRP and the second threshold corresponding to SNR. That is to say, the second condition should include at least one of the second threshold corresponding to RSRP and the second threshold corresponding to SNR.

[0131] Specifically, the first threshold in step S202 corresponds to a signal quality parameter, and in step S202, it is determined that the signal quality of the serving cell does not meet the first condition by judging this signal quality parameter. Therefore, at this time, the signal quality parameter corresponding to the first threshold should be the same as the signal quality parameter corresponding to the second threshold. For the convenience of understanding, the following is an example:

[0132] Suppose the first measurement result A is monitored, and the measurement result of the signal quality parameter A1 is included in the first measurement result A. Comparing the measurement result of the signal quality parameter A1 with the first threshold corresponding to the signal quality parameter A1, it is found that the measurement result of the signal quality parameter A1 is less than the first threshold, then it is determined that the signal quality of the serving cell does not meet the first condition, and the serving cell is recorded in the first cell set. It can be found that the reason for the signal quality of the serving cell not meeting the first condition is that the measurement result of the signal quality parameter A1 is less than the first threshold. Therefore, the signal quality parameter A1 is relatively poor.

[0133] Suppose the second threshold of the current signal quality parameter A1 is 3 dBm, and the value of the signal quality parameter A1 of the cell is 4 dBm. At this time, if the second threshold (i.e., the threshold corresponding to the terminal initiating an RRC connection to the serving cell) is not increased, the value of the signal quality parameter A1 is greater than the second threshold of the signal quality parameter A1, and the terminal will continuously initiate RRC connections to the cell.

[0134] Therefore, it is necessary to increase the second threshold of the signal quality parameter A1 in the second condition. After the second threshold of the signal quality parameter A1 is increased, the terminal will temporarily stop initiating RRC connections to the cell with relatively poor signal quality parameter A1 until it measures that the signal quality parameter of the cell reaches the increased second threshold, and then the terminal will initiate an RRC connection to the cell again. For example, if the second threshold of the signal quality parameter A1 is increased to 6 dBm, as described above, the size of the signal quality parameter A1 is 4 dBm. At this time, the terminal will not initiate an RRC connection to the cell. Only when the size of the signal quality parameter A1 reaches 6 dBm will the terminal initiate an RRC connection to the cell.

[0135] In addition, it should be noted that if the signal quality parameter A1 is RSRP, the second threshold corresponding to RSRP is increased; if the signal quality parameter A1 is SNR, the second threshold corresponding to SNR is increased; if the signal quality parameter A1 is both RSRP and SNR, the second thresholds corresponding to RSRP and SNR respectively are increased.

[0136] In step S303, since the second condition includes at least one second threshold, increasing the threshold in the second condition is equivalent to increasing the second threshold in the second condition. Therefore, the second threshold in the second condition can be increased with a fixed step size, that is, increased by a fixed amount each time, to achieve the increase of the threshold in the second condition. For example, increase by 3 dBm each time.

[0137] In step S304, similar to step S303, the second threshold in the second condition can be increased with an increasing step size. The size of the increasing step size in this embodiment is not limited, and it can be 1 dBm, 2 dBm, etc. For example, increase by 1 dBm for the first time, 2 dBm for the second time, 3 dBm for the third time, and so on. Another example, increase by 1 dBm for the first time, 3 dBm for the second time, 5 dBm for the third time, and so on. It should be noted that if the second threshold in the second condition is increased with an increasing step size, it is only necessary to confirm that the difference between the step size increased each time and the step size increased in the previous time is equal to the same constant.

[0138] It should be noted that during the process of continuously increasing the threshold of the second condition, the number of times the terminal fails to initiate an RRC connection to the serving cell can also be recorded. When the number of failure times is greater than or equal to the preset threshold, the serving cell can be prohibited from being accessed. On the contrary, if the number of failure times is less than the preset threshold, the serving cell can be determined as a cell with poor signal quality.

[0139] It should be noted that when the number of failure times is less than the preset threshold, there are two cases:

[0140] The first case is that the number of failure times is less than the preset threshold and the terminal successfully initiates an RRC connection to the serving cell. At this time, the terminal will access the serving cell and perform wireless communication.

[0141] The second case is that the number of failure times is less than the preset threshold and the terminal fails to initiate an RRC connection to the serving cell. In this case, the second threshold in the second condition needs to be increased again in a set manner (fixed step size / increasing step size) until the signal quality parameter of the cell reaches the increased second threshold and the terminal initiates an RRC connection to the serving cell. If the above process is looped, and the terminal still cannot successfully initiate an RRC connection to the serving cell, then when the number of failure times is greater than or equal to the preset threshold, the serving cell will also be prohibited, making the serving cell prohibited from being accessed.

[0142] In this embodiment, by increasing the threshold in the second condition, it is possible to avoid the terminal making multiple invalid RRC connection requests to the serving cell when the signal quality is relatively poor. This can not only save the power consumption of the terminal, but also solve the problem that the serving cell is prohibited from being accessed due to multiple invalid link connection failures, enabling the terminal to quickly access the cell providing the first network mode service when it returns to an area with good wireless signal reception, thus enhancing the user experience.

[0143] Figure 4 is a flowchart of a method for accessing a cell shown according to an exemplary embodiment. As Figure 4 shown, the method for accessing a cell shown in this embodiment includes:

[0144] S401. Determine that the signal quality of the serving cell of the terminal does not meet the first condition.

[0145] S402. Increase the threshold of the second condition.

[0146] S403. Record the first cell set.

[0147] S404. Record the second cell set.

[0148] S405. Determine that the state of the terminal is updated from the first network mode service state to the first state, and then from the first state to the second network mode service state.

[0149] S406. Monitor the second measurement result.

[0150] S407. Determine a first cell that meets the access condition from the neighboring cells according to the measurement result.

[0151] S408. Determine that the first cell belongs to the second cell set.

[0152] S409. Lift the prohibition on accessing the first cell.

[0153] S410. Access the first cell.

[0154] Among them, steps S401 - S402, S405, S409 - S410 are the same as steps S101 - S102, S103, S105 - S106 in the above embodiment, and will not be elaborated here.

[0155] Among them, this embodiment does not limit the specific forms of the first cell set and the second cell set. For example, the first cell set and the second cell set can be represented in the form of a list.

[0156] In step S403, in one example, the first cell set includes at least one cell. Moreover, the cells in the first cell set also have the following characteristics: at least one cell has served as the serving cell of the terminal, and the signal quality of at least one cell does not meet the first condition. For a certain cell, the above characteristics indicate that the terminal has accessed this cell, and the signal quality of this cell does not meet the first condition. Therefore, the first cell set includes the cells that have been accessed by the terminal but have poor signal quality. Briefly speaking, the cells in the first cell set can be understood as serving cells with poor signal quality.

[0157] Therefore, if the signal quality of the serving cell of the terminal does not meet the first condition, this serving cell can be added to the first cell set. In this embodiment, the serving cell with signal quality not meeting the first condition can be recorded in the first cell set to continuously expand the first cell set, so that the cells in the first cell set are more sufficient, facilitating the subsequent application of the first cell set in the second cell set and querying whether a certain cell belongs to the first cell set.

[0158] In step S404, in one example, the second cell set includes at least one cell. Moreover, at least one cell in the second cell set also has the following characteristics: at least one cell is in a state of being prohibited from access for the terminal, and at least one cell belongs to the first cell set. Generally speaking, when a certain cell belongs to the second cell set, it means that this cell has served as the serving cell of the terminal, the signal quality of this cell does not meet the first condition, and this cell is in a state of being prohibited from access for the terminal. Briefly speaking, the cells in the second cell set can be understood as cells with poor signal quality and in a state of being prohibited from access for the terminal.

[0159] In summary, it can be seen that the main difference between the first cell set and the second cell set is that the cells in the second cell set are in a state of being prohibited from access for the terminal, while the cells in the first cell set only have poor signal quality but are not prohibited from access.

[0160] In addition, during the process of step S402, this embodiment can also record the number of times the terminal fails to initiate an RRC connection to the serving cell. When the number of failures is greater than or equal to the preset threshold, the serving cell can be prohibited from access and the serving cell can be recorded in the second cell set. On the contrary, if the number of failures is less than the preset threshold, the serving cell can be recorded in the first cell set.

[0161] In step S406, the second measurement result may be the measurement result of the neighboring cells of the cell currently accessed by the terminal. In a mobile communication system, the terminal will stay in a suitable serving cell (i.e., the cell providing the second network mode service in this embodiment) through the cell initial search process and gradually establish a wireless communication process. At the same time, in order to obtain better communication effects, the terminal also needs to continuously monitor the cells neighboring the serving cell (i.e., neighboring cells) and perform tracking measurements on the communication quality of the monitored neighboring cells, so as to prepare for cell reselection and cell handover of the terminal.

[0162] In an example, the neighboring cells of the cell providing the second network mode service include the cell providing the second network mode service and / or the cell providing the first network mode service. Currently, when the terminal monitors neighboring cells, it mainly realizes the monitoring of neighboring cells by receiving the primary and secondary synchronization signals sent by the base station and performing correlation calculations on the received primary and secondary synchronization signals. In an example, the measurement result of a neighboring cell may be the result of measuring different parameters of the neighboring cell.

[0163] It should be noted that although in the actual application process, the neighboring cells of the cell providing the second network mode service may include two types of cells, namely the cell providing the second network mode service and the cell providing the first network mode service, in this embodiment, only the case where the neighboring cell provides the first network mode service is discussed. That is, in this embodiment, the neighboring cell refers to the neighboring cell providing the first network mode service.

[0164] Among them, if the measurement result of the required neighboring cell (i.e., the cell providing the first network mode service) is not included in the monitored second measurement result, the terminal is controlled to continue monitoring until the measurement result of the neighboring cell providing the first network mode service is monitored.

[0165] In step S407, after listening to the measurement result of the neighboring cell, the terminal will compare the monitored second measurement result with the access condition to determine one or more neighboring cells that meet the access condition.

[0166] In an example, if the terminal only monitors the measurement result of one neighboring cell, the terminal may determine whether the neighboring cell meets the access condition based on the measurement result of the neighboring cell. If the neighboring cell meets the access condition, the neighboring cell is determined as the first cell. Otherwise, continue to listen to the measurement result of the neighboring cell until the first cell that meets the access condition is determined.

[0167] In another example, if the terminal monitors the measurement results of multiple neighboring cells, the terminal can first determine a neighboring cell from the multiple neighboring cells based on the measurement results of the multiple neighboring cells, and then determine whether the neighboring cell meets the access condition. If the neighboring cell meets the access condition, the neighboring cell is determined as the first cell. Otherwise, a neighboring cell is selected again from the multiple neighboring cells, and the above steps are continued until the first cell is obtained.

[0168] In another example, if the terminal monitors the measurement results of multiple neighboring cells, the terminal can first determine the neighboring cells that meet the access condition among the multiple neighboring cells, and determine one of the neighboring cells that meet the access condition as the first cell. Herein, this embodiment does not limit the technical means for determining one neighboring cell from multiple neighboring cells. For example, by comparing the reference signal receiving quality of multiple neighboring cells, a neighboring cell with the best reference signal receiving quality can be determined from the multiple neighboring cells, and the neighboring cell is determined as the first cell; or for another example, by comparing the reference signal receiving power of multiple neighboring cells, a neighboring cell with the best reference signal receiving power can be determined from the multiple neighboring cells, and the neighboring cell is determined as the first cell.

[0169] In one example, the access condition can be the S-criterion, that is, to determine the first cell that meets the S-criterion from neighboring cells. The S-criterion, whose full name is Serving Cell Change, is an index used to measure the cell selection quality. When the terminal believes that a certain cell is more suitable than the current serving cell, it will trigger the cell reselection process, thereby realizing the handover from the current serving cell to the target cell. And the S-criterion is the standard used to evaluate whether the target cell meets the handover requirements during this cell reselection process.

[0170] The evaluation criteria of the S-criterion mainly include two aspects: received power (Srxlev) and received quality (Squal). The received power refers to the signal strength of the target cell and is used to measure the quality of signal propagation; the received quality refers to the signal quality of the target cell and is used to measure the signal interference situation. When the terminal makes a selection among multiple cells, the S-criterion can help the terminal determine a cell with sufficient signal strength and good signal quality.

[0171] Specifically, the calculation formula of the S-criterion is Srxlev > 0 and Squal > 0. Therefore, when the received power of the target cell is greater than 0 and the received quality of the target cell is greater than 0, it indicates that the target cell meets the S-criterion.

[0172] In one example, the calculation formula of Srxlev is as follows:

[0173] Srxlev = Qrxlevmeas – (qRxLevMin + qRxLevMinOffset) – pCompensation

[0174] Among them, Qrxlevmeas represents the reference signal received power of the measured cell (target cell).

[0175] qRxLevMin represents the minimum received power of the cell. Increasing the value of the minimum received power of the cell can increase the minimum received power of the cell, making it more difficult for the cell to meet the S criterion and more difficult to be a suitable cell for selection. On the contrary, if the value of this parameter is decreased, it can make the cell easier to meet the S criterion. It should be noted that although the value of this parameter can be increased / decreased, the value of this parameter should be restricted within a certain range, such as -70 dBm to 72 dBm.

[0176] qRxLevMinOffset represents the offset of the minimum received power of the cell. It represents the offset of the minimum received power when the terminal camps on the visited public land mobile network and searches for a high-priority public land mobile network. This parameter can effectively prevent reselection oscillation.

[0177] pCompensation represents the power compensation value. Specifically, the calculation formula of the parameter pCompensation is as follows:

[0178] pCompensation = max(pMax – puMax, 0)

[0179] Among them, pMax represents the maximum uplink transmission power allowed by the cell for the terminal, and puMax represents the maximum uplink transmission power supported by the terminal's capability, that is, the actual maximum transmission power of the terminal. puMax is usually determined by the terminal's own capability. Generally speaking, the value range of puMax is -30 dBm to 33 dBm.

[0180] In one example, when the maximum uplink transmission power allowed by the cell for the terminal is less than or equal to the maximum uplink transmission power supported by the terminal's capability, pCompensation = 0. In another example, when the maximum uplink transmission power allowed by the cell for the terminal is greater than the maximum uplink transmission power supported by the terminal's capability, pCompensation = pMax – puMax.

[0181] In one example, the calculation formula of Squal is as follows:

[0182] Squal = Qqualmeas – (qQualMin + qQualMinOffset)

[0183] Among them, Qqualmeas represents the reference signal reception quality of the measured cell.

[0184] qQualMin represents the minimum received signal quality of the cell, which is used to control the difficulty of cell reselection. Increasing the minimum received signal quality of a certain cell can make it more difficult for the cell to meet the S criterion and more difficult to become a suitable cell, increasing the difficulty of selecting the cell. Conversely, if the minimum received signal quality of the cell is decreased, the cell will be more likely to become a suitable cell. Generally speaking, the value range of the minimum received signal quality of the cell can be from -34 dBm to -3 dBm.

[0185] qQualMinOffset represents the reception quality offset of the minimum received signal of the cell. It should be noted that this parameter is only used when the terminal camps on the visited public land mobile network and cell selection is triggered due to periodic search for a higher-priority public land mobile network.

[0186] Therefore, in practical applications, the parameters required to determine whether a neighboring cell meets the S criterion can be obtained in step S406, such as the reference signal received power, reference signal reception quality, etc. of the neighboring cell, and the obtained parameters are used as measurement results. Then, Srxlev and Squal are calculated according to the measurement results, and when Srxlev > 0 and Squal > 0, it is determined that the neighboring cell meets the access condition.

[0187] In step S408, referring to the content in step S403 above, it can be known that when a certain cell belongs to the second cell set, it means that the cell has been used as the serving cell of the terminal, the signal quality of the cell does not meet the first condition, and the cell is in a state of being prohibited from accessing the terminal. Since the first cell should also be in a state of being prohibited from accessing the terminal for the terminal, after determining the first cell that meets the access condition, it is also necessary to determine whether the first cell belongs to the second cell set. Only when the first cell meets the access condition and the first cell belongs to the second cell set, can it be determined that the first cell is prohibited from accessing and the first cell can be released from the prohibited access by the terminal.

[0188] In this embodiment, by setting the first cell set and the second cell set, the cells can be classified. The cells with poor signal quality are classified into the first cell set, and the cells with poor signal quality and prohibited from accessing are classified into the second cell set. In the subsequent communication process, as long as it is queried that the first cell belongs to the second cell set, it can be determined that the first cell is a cell prohibited from accessing due to the first reason, and the reason for the first cell being prohibited from accessing can be omitted, saving time and effort, and completing the subsequent deactivation operation faster and more conveniently, enabling the terminal to quickly access the first cell.

[0189] Figure 5It is a flowchart of a method for accessing a cell shown according to an exemplary embodiment. For the convenience of understanding, the following uses a specific embodiment to illustrate the method for accessing a cell: Among them, the NR service state is used as the service state of the first network mode, and the LTE service state is used as the service state of the second network mode. And, concepts such as NR cells, NR serving cells, and LTE cells are extended from the above specific first network mode service state and second network mode service state.

[0190] S501. If it is detected that the signal quality of the NR serving cell where the terminal is currently camped is relatively poor and there is a situation of RRC connection failure once, set a monitoring timer.

[0191] S502. Start the monitoring timer and monitor the signal quality of the NR serving cell within a certain period of time.

[0192] S503. If within a certain period of time, the signal quality of the NR serving cell is less than the signal threshold, determine that the signal quality of the NR serving cell is poor and record the NR serving cell in the first cell set.

[0193] S504. Determine whether the NR serving cell is prohibited from access.

[0194] S505. If the NR serving cell is not prohibited from access, increase the implementation difficulty of the condition corresponding to the terminal initiating an RRC connection to the NR serving cell.

[0195] S506. Determine the reason for the poor signal quality of the NR serving cell.

[0196] S507. If the reason for the poor signal quality of the NR serving cell is that the RSRP of the NR serving cell is less than the signal threshold, increase the second threshold corresponding to the RSRP of the NR serving cell.

[0197] S508. If the reason for the poor signal quality of the NR serving cell is that the SNR of the NR serving cell is less than the signal threshold, increase the second threshold corresponding to the SNR of the NR serving cell.

[0198] S509. If the reason for the poor signal quality of the NR serving cell is that both the RSRP and SNR of the NR serving cell are less than the signal threshold, increase the second thresholds corresponding to the RSRP and SNR of the NR serving cell.

[0199] S510. If the NR serving cell is prohibited from access, record the NR serving cell in the second cell set.

[0200] S511. If it is detected that the state of the terminal is updated to the LTE service state, monitor the measurement results of the NR cells in the neighboring cells of the LTE cell.

[0201] S512. Determine whether the signal quality of the NR cell meets the S criterion.

[0202] S513. If the signal quality of the NR cell meets the S criterion, determine whether the NR cell belongs to the second cell set.

[0203] S514. If the signal quality of the NR cell does not meet the S criterion, jump to S511 to re-determine the NR cell.

[0204] S515. If the NR cell belongs to the second cell set, lift the access prohibition on the NR cell and access the NR cell.

[0205] S516. If the NR cell does not belong to the second cell set, access the NR cell.

[0206] An exemplary embodiment of the present disclosure provides a device for accessing a cell, as Figure 6 shown in the block diagram of a device for accessing a cell shown in the present disclosure.

[0207] The block diagram includes a first determination module 61, a first processing module 62, a second determination module 63, a third determination module 64, a deban module 65, and an access module 66. The first determination module 61 is configured to determine that the signal quality of the serving cell of the terminal does not meet the first condition, and the serving cell provides the first network mode service. The first processing module 62 is configured to increase the threshold of the second condition, and the second condition is the condition for the terminal to initiate a Radio Resource Control (RRC) connection to the serving cell. The second determination module 63 is configured to determine that the state of the terminal is updated from the first network mode service state to the first state, and from the first state to the second network mode service state, where the first network mode is higher than the second network mode. The third determination module 64 is configured to determine the first cell, where the first cell has been prohibited from access and provides the first network mode service. The deban module 65 is configured to lift the access prohibition on the first cell. The access module 66 is configured to access the first cell.

[0208] In some embodiments, the first state is the out-of-network service state; or

[0209] The first state is the third network mode service state, where the third network mode is lower than the first network mode and the second network mode.

[0210] In some embodiments, the first determination module 61 is specifically configured to:

[0211] Monitor the first measurement result within the first time period, where the first measurement result is the measurement result of the signal quality parameter of the terminal for the serving cell;

[0212] If each measurement result in the first measurement results is less than the first threshold corresponding to the signal quality parameter, it is determined that the signal quality of the serving cell does not meet the first condition.

[0213] In some embodiments, the first determination module 61 is specifically configured to:

[0214] After determining that the signal quality of the serving cell is less than the second threshold and there is at least one RRC connection failure within the second time period, listen for the first measurement results within the first time period.

[0215] In some embodiments, the second condition includes at least one second threshold, and the second threshold corresponds to the signal quality parameter.

[0216] In some embodiments, the first processing module 62 is specifically configured to:

[0217] Increase the threshold in the second condition with a fixed step size.

[0218] In some embodiments, the first processing module 62 is specifically configured to:

[0219] Increase the threshold in the second condition with an increasing step size.

[0220] In some embodiments, the third determination module 64 is specifically configured to:

[0221] Listen for the second measurement results, where the second measurement results are the measurement results of the terminal for neighboring cells, and the neighboring cells provide the first network mode service;

[0222] Determine the first cell that meets the access condition from the neighboring cells according to the measurement results.

[0223] In some embodiments, the device for accessing a cell further includes a second processing module, which is configured to:

[0224] Record the first cell set, where the first cell set includes at least one cell, at least one cell has served as the serving cell of the terminal, and the signal quality of at least one cell does not meet the first condition;

[0225] Record the second cell set, where the second cell set includes at least one cell, at least one cell is in a prohibited access state for the terminal, and at least one cell belongs to the first cell set;

[0226] The third determination module 64 is specifically configured to:

[0227] Determine that the first cell belongs to the second cell set.

[0228] In some embodiments, the first cell is prohibited from accessing due to the first reason, where the first reason is multiple RRC connection failures.

[0229] Regarding the device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0230] Figure 7 It is a block diagram of an electronic device 700 shown according to an exemplary embodiment.

[0231] Referring to Figure 7 , the electronic device 700 may include one or more of the following components: a processing component 702, a memory 704, a power supply component 706, a multimedia component 708, an audio component 710, an input / output (I / O) interface 712, a sensor component 714, and a communication component 716.

[0232] The processing component 702 generally controls the overall operation of the electronic device 700, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 702 may include one or more modules to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702.

[0233] The memory 704 is configured to store various types of data to support the operation of the electronic device 700. Examples of such data include instructions for any application or method operating on the electronic device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0234] The power supply component 706 provides power to various components of the electronic device 700. The power supply component 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 700.

[0235] The multimedia component 708 includes a screen that provides an output interface between the electronic device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the electronic device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0236] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC) that is configured to receive external audio signals when the electronic device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 further includes a speaker for outputting audio signals.

[0237] The I / O interface 712 provides an interface between the processing component 702 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include but are not limited to: a home button, a volume button, a power button, and a lock button.

[0238] The sensor component 714 includes one or more sensors for providing an assessment of various aspects of the status of the electronic device 700. For example, the sensor component 714 can detect the on / off state of the electronic device 700, the relative positioning of components, such as the display and the keypad of the electronic device 700. The sensor component 714 can also detect a change in the position of the electronic device 700 or a component of the electronic device 700, the presence or absence of user contact with the electronic device 700, the orientation or acceleration / deceleration of the electronic device 700, and the temperature change of the electronic device 700. The sensor component 714 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 714 can also include a light sensor, such as a CMOS or a CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 714 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0239] The communication component 716 is configured to facilitate communication between the electronic device 700 and other devices in a wired or wireless manner. The electronic device 700 can access a communication standard-based wireless network, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0240] In an exemplary embodiment, the electronic device 700 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0241] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, and the above instructions can be executed by a processor 720 of the electronic device 700 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, Random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0242] A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to execute the method for accessing a cell provided by the exemplary embodiments of the present disclosure.

[0243] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only to be considered exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0244] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A method for accessing a cell, applied to a terminal, characterized in that, it includes: Determine that the signal quality of the serving cell of the terminal does not meet the first condition, and the serving cell provides a first network mode service; Increase the threshold of the second condition, where the second condition is the condition for the terminal to initiate a Radio Resource Control (RRC) connection to the serving cell; Determine that the state of the terminal is updated from the first network mode service state to the first state, and then from the first state to the second network mode service state, where the first network mode is higher than the second network mode; Determine a first cell that has been prohibited from access and provides a first network mode service; Remove the prohibition on accessing the first cell; Access the first cell.

2. The method according to claim 1, characterized in that, the first state is an out-of-network service state; or the first state is a third network mode service state, where the third network mode is lower than the first network mode and the second network mode.

3. The method according to claim 1, characterized in that, the determination that the signal quality of the serving cell of the terminal does not meet the first condition includes: Monitor a first measurement result within a first time period, where the first measurement result is the measurement result of the signal quality parameter of the serving cell by the terminal; If each measurement result in the first measurement result is less than the first threshold corresponding to the signal quality parameter, determine that the signal quality of the serving cell does not meet the first condition.

4. The method according to claim 3, characterized in that, the monitoring of the first measurement result within the first time period includes: After determining that the signal quality of the serving cell is less than a second threshold and there is at least one RRC connection failure within a second time period, monitor the first measurement result within the first time period.

5. The method according to claim 1, characterized in that, the second condition includes at least one second threshold, and the second threshold corresponds to a signal quality parameter.

6. The method according to claim 1, characterized in that, the increasing of the threshold of the second condition includes: Increasing the threshold in the second condition with a fixed step size.

7. The method according to claim 1, characterized in that, the increasing of the threshold of the second condition includes: Increasing the threshold in the second condition with an increasing step size.

8. The method according to claim 1, characterized in that, the determination of the first cell includes: Monitor a second measurement result, where the second measurement result is the measurement result of the terminal for neighboring cells that provide a first network mode service; Determine the first cell that meets the access conditions from the neighboring cells according to the measurement results.

9. The method according to claim 8, characterized in that, the method further includes: Record a first cell set, where the first cell set includes at least one cell that has served as the serving cell of the terminal and the signal quality of the at least one cell does not meet the first condition; Record a second cell set, where the second cell set includes at least one cell that is in a prohibited access state for the terminal, and the at least one cell belongs to the first cell set; The determining the first cell includes: Determine that the first cell belongs to the second cell set.

10. The method according to claim 1, wherein, The first cell is prohibited from accessing due to a first reason, where the first reason is multiple RRC connection failures.

11. An apparatus for accessing a cell, applied to a terminal, wherein, comprises: A first determining module, configured to determine that the signal quality of the serving cell of the terminal does not meet a first condition, and the serving cell provides a first network mode service; A first processing module, configured to increase the threshold of a second condition, where the second condition is the condition for the terminal to initiate a Radio Resource Control (RRC) connection to the serving cell; A second determining module, configured to determine that the state of the terminal is updated from a first network mode service state to a first state, and then from the first state to a second network mode service state, where the first network mode is higher than the second network mode; A third determining module, configured to determine a first cell that has been prohibited from accessing and provides a first network mode service; An unlocking module, configured to lift the prohibition on accessing the first cell; An access module, configured to access the first cell.

12. An electronic device, wherein, comprises: A processor; A memory for storing processor-executable instructions; wherein, the processor is configured to execute the method for accessing a cell according to any one of claims 1-10.

13. A non-transitory computer-readable storage medium, wherein, When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method for accessing a cell according to any one of claims 1-10.

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