WO2023197693A1 - Frequency band search method and apparatus, and electronic device and computer-readable storage medium - Google Patents

Abstract

The present application relates to a frequency band search method. The method comprises: during a cell selection process, determining a plurality of candidate frequency bands to be searched, wherein each candidate frequency band comprises a plurality of frequency points, and the frequency points correspond to different cells; and sequentially performing a frequency band search on the plurality of candidate frequency bands according to a frequency band search sequence, which is determined on the basis of bandwidth values, until a target frequency band is found, wherein the target frequency band comprises frequency points corresponding to cells which allow a terminal to access. By using the present method, the communication quality of a terminal can be improved.

Description

Frequency band search method, device, electronic equipment and computer-readable storage medium

This application requires the priority of the Chinese patent application submitted to the State Intellectual Property Office of the People's Republic of China on April 12, 2022, with application number 2022103803158 and the invention title "Frequency band search method, device, electronic equipment and computer-readable storage medium" , the entire contents of which are incorporated herein by reference.

Technical field

The present application relates to the field of mobile communication technology, and in particular to a frequency band search method, device, electronic equipment and computer-readable storage medium.

Background technique

With the rapid development of mobile communication technology, more and more mobile terminals appear in people's lives and work. For mobile terminals, in the process of cell selection, they first need to perform the process of searching for frequency bands, and then camp on the cell after searching for available frequency bands.

In related technologies, mobile terminals usually scan each frequency band in sequence based on a default frequency band number to determine available frequency bands.

However, the above-mentioned frequency band search method often results in poor communication quality of mobile terminals.

Contents of the invention

Embodiments of the present application provide a frequency band search method, device, electronic device, and computer-readable storage medium, which can improve the communication quality of the terminal.

In a first aspect, a frequency band search method is provided, and the method includes:

In the process of cell selection, multiple candidate frequency bands to be searched are determined, each of the candidate frequency bands includes multiple frequency points, and each of the frequency points corresponds to a different cell;

Frequency band searches are performed on the plurality of candidate frequency bands in sequence according to a frequency band search sequence determined based on the bandwidth value until a target frequency band is searched, where the target frequency band includes frequency points corresponding to cells that can be accessed by terminals.

In a second aspect, a frequency band search device is provided, and the device includes:

A determination module, configured to determine multiple candidate frequency bands to be searched during the cell selection process. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell;

The search module is configured to perform frequency band searches on the plurality of candidate frequency bands in sequence according to the frequency band search order determined based on the bandwidth value until a target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by terminals.

In a third aspect, an electronic device is provided, including a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor implements the above-described first aspect. frequency band search method.

A fourth aspect provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the frequency band search method as described in the first aspect is implemented.

In a fifth aspect, a computer program product is provided, including a computer program that implements the frequency band search method as described in the first aspect when executed by a processor.

The beneficial effects brought by the technical solutions provided by the embodiments of this application at least include:

By determining multiple candidate frequency bands to be searched during the cell selection process, each candidate frequency band includes multiple frequency points, each frequency point corresponds to a different cell, and then the multiple frequency bands are searched according to the frequency band search sequence determined based on the bandwidth value. The candidate frequency bands are searched sequentially until the target frequency band is searched. The target frequency band includes the frequency points corresponding to the cells that can be accessed by the terminal. Since the frequency band search order is determined based on the bandwidth value, the candidate frequency band with a large bandwidth value can be The search priority is increased, so that when searching for a frequency band, the terminal can give priority to the candidate frequency band with a large bandwidth value for cell selection, which improves the probability of the terminal staying in the candidate frequency band with a large bandwidth value. Since the terminal's peak rate and resident There is a positive correlation with the bandwidth value of the reserved frequency band. Therefore, increasing the probability that the terminal resides in the candidate frequency band with a large bandwidth value will help increase the peak rate of the terminal, thereby improving the communication quality of the terminal.

Description of the drawings

Figure 1 is an application environment diagram of the frequency band search method in an embodiment;

Figure 2 is a flow chart of a frequency band search method in an embodiment;

Figure 3 is a flow chart for determining multiple candidate frequency bands to be searched in one embodiment;

Figure 4 is a schematic diagram of an exemplary networking method in an embodiment;

Figure 5 is a flow chart for configuring a frequency band list in one embodiment;

Figure 6 is a flow chart of step 502 in one embodiment;

Figure 7 is a flow chart for determining the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message in one embodiment;

Figure 8 is a structural block diagram of a frequency band search device in an embodiment;

Figure 9 is an internal structure diagram of a computer device in one embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

At present, the frequency bands provided by operators are roughly divided into two categories: 1) Mid- and low-frequency frequency bands used for coverage, such as: LTE (Long Term Evolution, Long Term Evolution) Band (frequency band) 71, NR (New Radio, New Radio) Band n71, etc. , where 71 and n71 are the frequency band numbers of the corresponding frequency bands respectively; 2) high-frequency frequency bands used to provide high-quality services, such as LTE Band 66, NR Bandn41, FR (Frequency Rang, frequency range) 2n261, etc., similarly, 66 , n41 and n261 are the frequency band numbers of the corresponding frequency bands.

Compared with mid- and low-frequency bands, high-frequency bands have richer spectrum resources and have higher bandwidth capabilities. For example, the bandwidth configurations of the low-frequency band LTE Band 5 (850MHz) are 1.4MHz, 3MHz, 5MHz, 10MHz, etc., the bandwidth configurations of the high-frequency band LTE Band 38 (2500MHz) are 15MHz, 20MHz, etc., and the NR FR2 Band (millimeter wave) n257-n261, its bandwidth capability advantage is even more obvious.

When a mobile terminal is turned on or enters a coverage area from a blind spot, it will search for all frequency bands allowed by PLMN (Public Land Mobile Network) and select a suitable cell to camp on. This process is called "cell selection". That is, during the cell selection process, the mobile terminal needs to perform a frequency band search process to search available frequency bands to find a suitable cell.

Cell selection is divided into two types: initial cell selection and stored information cell selection. In the initial cell selection process, in the related art, the mobile terminal generally scans each frequency band in sequence based on the default frequency band number to determine the available frequency band. Normally, the mobile terminal searches for frequency bands in order from low to high frequency band numbers. Once a suitable cell is found (a suitable cell is a cell that meets the cell selection criteria), the mobile terminal will perform network registration or attachment. The cell selection process is terminated.

However, in the above cell selection process, since the frequency band numbers of the mid- and low-frequency bands are usually small, even if the mobile terminal is in an area where the mid-low frequency band and the high-frequency band cross-cover, the mobile terminal can still select the frequency band number based on the order from low to high. Frequency band searches will be performed on mid- and low-frequency bands first. Therefore, mobile terminals usually reside in mid- and low-frequency bands with lower bandwidth capabilities.

Furthermore, since the peak rate of the mobile terminal is positively related to the bandwidth value of the frequency band in which the mobile terminal resides, the above-mentioned mobile terminal preferentially performs frequency band searches on the mid- and low-frequency bands and resides in the mid- and low-frequency bands with lower bandwidth capabilities. This will lead to poor communication quality of the mobile terminal.

In view of this, the frequency band search method provided by the embodiment of the present application determines multiple candidate frequency bands to be searched during the cell selection process. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell. The plurality of candidate frequency bands are searched sequentially according to the frequency band search order determined based on the bandwidth value until the target frequency band is searched. The target frequency band includes frequency points corresponding to the cells that can be accessed by the terminal. Since the frequency band search order is based on bandwidth The value is determined, so that the search priority of the candidate frequency band with a large bandwidth value can be improved. In this way, when the terminal searches for the frequency band, it can give priority to the candidate frequency band with a large bandwidth value for cell selection, which improves the terminal's ability to reside in the frequency band with a large bandwidth value. The probability of the candidate frequency band. Since the peak rate of the terminal is positively related to the bandwidth value of the resident frequency band, increasing the probability of the terminal resident in the candidate frequency band with a large bandwidth value is conducive to increasing the peak rate of the terminal, thus improving the communication quality of the terminal. .

Next, a brief description will be given of the implementation environment involved in the frequency band search method provided by the embodiment of the present application.

For example, as shown in Figure 1, the implementation environment may include a terminal 100 and a base station 200, and the terminal 100 and the base station 200 may communicate through a network.

Among them, the terminal 100 may include a PDA (Chinese: personal digital assistant, English: personal digital assistant), a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a 5G network User equipment in the PLMN network or user equipment in the future evolved PLMN network, etc. The base station 200 may be any type of base station equipment such as a macro base station, a micro base station, or a pico base station.

It should be noted that the execution subject of the frequency band search method provided by the embodiments of the present application may be a frequency band search device. The frequency band search device may be implemented as part or all of the terminal through software, hardware, or a combination of software and hardware. In the following method embodiments, the execution subject is a terminal as an example for description.

Please refer to Figure 2, which shows a flow chart of a frequency band search method provided by an embodiment of the present application. This method is explained by taking the application of this method to the terminal 100 in Figure 1 as an example. As shown in Figure 2, the frequency band search method can include the following steps:

Step 201: During the cell selection process, the terminal determines multiple candidate frequency bands to be searched.

When the terminal is powered on or when the terminal enters the network coverage area from the blind area, it needs to perform cell selection to select a suitable cell to camp on. The cell selection may refer to the initial cell selection.

In the process of cell selection, the terminal first needs to determine multiple candidate frequency bands. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell. The terminal can select a frequency band from multiple candidate frequency bands, and select Search for cells that meet the cell selection criteria to camp on each frequency point in the frequency band.

The following is an exemplary description of the manner in which a terminal determines multiple candidate frequency bands to be searched through two different implementations.

In a possible implementation, the terminal can obtain a frequency band list. The frequency band list includes the frequency band identifier of each candidate frequency band. The frequency band identifier of the candidate frequency band may be the frequency band number of the candidate frequency band. The frequency band identifier is used to uniquely identify a candidate frequency band. In this way, the terminal can determine the candidate frequency band corresponding to each frequency band identifier based on the multiple frequency band identifiers in the frequency band list.

Exemplarily, the frequency band list can be stored in a preset storage location of the terminal. During the cell selection process, the terminal can obtain the frequency band list from the preset storage location. Exemplarily, the frequency band list can also be the terminal's preset storage location. Obtained from other network devices, for example, the terminal can obtain the frequency band list from the storage server, etc. There is no specific restriction on the method of obtaining the frequency band list.

In another possible implementation, the terminal can also determine multiple candidate frequency bands to be searched based on the terminal's hardware support capability and the operator's network capability. The hardware support capability refers to the network standard supported by the terminal hardware, and the operator The network capabilities refer to the high-frequency bands, mid-frequency bands and/or low-frequency bands specifically supported by the operator. The terminal can use the frequency bands specifically supported by the operator corresponding to the network standard supported by the terminal as multiple candidate frequency bands to be searched.

For example, the network standard supported by the terminal is the LTE network of operator A. The frequency bands specifically supported by operator A include high-frequency band A, mid-frequency band B, and low-frequency band C. The terminal will use the high-frequency band A and mid-frequency band B. And low-frequency band C is used as the candidate frequency band to be searched.

Step 202: The terminal sequentially searches multiple candidate frequency bands according to the frequency band search order determined based on the bandwidth value until the target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by the terminal.

In this embodiment of the present application, the frequency band search order used by the terminal to perform frequency band search is determined based on the bandwidth value of each candidate frequency band. The bandwidth value of the candidate frequency band may be the sum of the bandwidths of each carrier unit allocated by the base station to the candidate frequency band.

Determining the frequency band search order based on the bandwidth value is exemplarily introduced below.

In a possible implementation, the frequency band search order is the order of bandwidth values corresponding to each candidate frequency band from large to small.

In another possible implementation, each candidate frequency band may also be divided into different bandwidth intervals according to the size of its bandwidth value. The multiple bandwidth intervals may include, for example, a first bandwidth interval, a second bandwidth interval, and a third bandwidth interval. Bandwidth interval, the bandwidth values of each candidate frequency band included in the first bandwidth interval are greater than each bandwidth value included in the second bandwidth interval, and each bandwidth value included in the second bandwidth interval is greater than each bandwidth included in the third bandwidth interval value, that is, the first bandwidth interval is the high bandwidth interval, the second bandwidth interval is the medium bandwidth interval, and the third bandwidth interval is the low bandwidth interval. The frequency band search order is the first bandwidth interval, then the second bandwidth interval, and finally the third bandwidth interval.

It should be noted that there is no specific restriction on the frequency band search order within the first bandwidth interval, the second bandwidth interval or the third bandwidth interval. For example, it can be in order from large to small bandwidth values, or it can be random. Select candidate frequency bands for band search, etc.

In this way, after determining the frequency band search order, the terminal sequentially performs frequency band searches on multiple candidate frequency bands based on the frequency band search order. For a candidate frequency band, the terminal performs a cell search for each frequency point in the candidate frequency band. Specifically, it searches for a cell that meets the cell selection criteria on each frequency point. If no cell is found on each frequency point of the current candidate frequency band, For a cell that satisfies the cell selection criteria, the terminal will perform a cell search for each frequency point in the next candidate frequency band based on the frequency band search order, and so on, until the terminal searches for a cell that satisfies the cell selection on a certain frequency point in a candidate frequency band. If the terminal searches for a cell that meets the cell selection criteria, then the candidate frequency band is the target frequency band. After the terminal searches for a cell that meets the cell selection criteria, it can access the cell to camp and complete the cell selection process, that is, the cell selection is successful.

An exemplary implementation of the above frequency band search sequence:

1) When the frequency band search order is the order of the bandwidth values corresponding to each candidate frequency band from large to small, the frequency band identifiers in the frequency band list in the embodiment of this application can be arranged in the order of the bandwidth values of the corresponding candidate frequency bands from large to small, In this way, the terminal can perform the following step A1 to implement the process of step 202:

Step A1: The terminal performs frequency band searches on multiple candidate frequency bands in sequence according to the order of frequency band identifiers in the frequency band list until the cell selection is successful.

That is, the terminal first performs a frequency band search on the candidate frequency band corresponding to the first frequency band identifier in the arrangement sequence (the bandwidth value corresponding to the candidate frequency band is the largest among the candidate frequency bands). If a cell that satisfies the cell selection criteria is found in the candidate frequency band, then The cell selection is successful; if the terminal does not find a cell that satisfies the cell selection criteria in the candidate frequency band, the terminal continues to perform a frequency band search on the candidate frequency band corresponding to the second frequency band identifier in the sequence, and so on, until it finds a cell that satisfies the cell selection criteria. community.

2) When the frequency band search order is first the first bandwidth interval, then the second bandwidth interval, and finally the third bandwidth interval, the terminal sequentially searches each bandwidth value in the first bandwidth interval, the second bandwidth interval and the third bandwidth interval. The corresponding candidate frequency band is searched until a cell that meets the cell selection criteria is found.

The above embodiment determines multiple candidate frequency bands to be searched during the cell selection process. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell. Then, the frequency band search order is determined based on the bandwidth value. The plurality of candidate frequency bands are searched sequentially until the target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by terminals. Since the frequency band search order is determined based on the bandwidth value, the frequency band with a large bandwidth value can be The search priority of candidate frequency bands is increased. In this way, when searching for frequency bands, the terminal can first search for candidate frequency bands with a large bandwidth value for cell selection, which increases the probability that the terminal resides in a candidate frequency band with a large bandwidth value. Since the peak rate of the terminal is positively related to the bandwidth value of the resident frequency band, taking NR as an example, specifically, 3GPP (3rd Generation Partner Project) stipulates that the peak rate of the terminal is calculated as follows, see the formula 1:

Formula 1

Among them, is the peak rate. It can be seen that the peak rate is positively correlated with the number of carriers J, the number of spatial multiplexing layers, the modulation order, the scale factor, and the bandwidth value of the frequency band, and is negatively correlated with the system overhead.

Since the peak rate of the terminal is positively related to the bandwidth value of the frequency band in which it resides, increasing the probability that the terminal resides in the candidate frequency band with a large bandwidth value is conducive to increasing the peak rate of the terminal, thereby improving the communication quality of the terminal and obtaining a higher While providing excellent network bandwidth services, it also meets 3GPP protocol specifications.

In one embodiment, based on the above embodiment, referring to FIG. 3 , this embodiment relates to the process of how a terminal determines multiple candidate frequency bands to be searched. As shown in Figure 3, the process includes steps 301 and 302:

Step 301: The terminal determines the network type of the network currently to be accessed.

The network type can be LTE or NR. NR is divided into NR NSA (Non-Standalone, non-standalone networking) and NR SA (Standalone, independent networking) according to its different networking methods. The following is a brief description of the NSA networking mode and SA networking mode.

Refer to Figure 4, which is a schematic diagram of an exemplary networking method. Among them, the networking mode of the terminal marked Option 3&3x in Figure 4 is NSA, and its corresponding main base station is the LTE base station; the networking mode of the terminal marked Option 2 is SA; the networking mode of the terminal marked Option 4 It is NSA, and its corresponding main base station is NR base station.

The terminal determines the network type of the current network to be accessed by obtaining user input through the network type selection interface displayed by the terminal. For example, the user selects the LTE network in the network type selection interface, and the terminal determines the network of the current network to be accessed. Type is LTE.

Step 302: The terminal obtains a frequency band list corresponding to the network type. The frequency band list includes the frequency band identifier of each candidate frequency band.

It can be understood that the candidate frequency bands corresponding to different network types and the corresponding bandwidth composition of the candidate frequency bands are different. For example, for the candidate frequency band corresponding to LTE or SA, its bandwidth value is equal to the sum of the bandwidths of each carrier unit of the candidate frequency band; for The bandwidth value of the candidate frequency band corresponding to NSA is equal to the sum of the bandwidth of each carrier unit of MCG (Master Cell group, primary cell group) and the bandwidth of each carrier unit of SCG (Secondary Cell group, secondary cell group).

Therefore, in this embodiment of the present application, different network types have their corresponding frequency band lists. For a network type, the frequency band list corresponding to the network type includes the frequency band identifiers of each candidate frequency band under the network type. The bandwidth value of the candidate frequency band corresponding to each frequency band identifier is calculated according to the calculation method of the above bandwidth value. As an implementation manner, each frequency band identifier in the frequency band list is arranged in descending order according to the bandwidth value of the corresponding candidate frequency band. In this way, the terminal determines the network type of the network currently to be accessed and obtains the frequency band corresponding to the network type. After the list is made, frequency band searches can be performed on multiple candidate frequency bands in sequence according to the order of frequency band identifiers in the frequency band list until the cell selection is successful.

The above embodiment can improve the accuracy of the frequency band list by configuring corresponding frequency band lists for different network types, thereby improving the accuracy of terminal frequency band search.

Based on the embodiment shown in FIG. 3 , referring to FIG. 5 , this embodiment relates to the process of how a terminal configures a frequency band list. As shown in Figure 5, before the terminal obtains the frequency band list corresponding to the network type, the terminal can also perform steps 501 and 502 shown in Figure 5 to configure the frequency band list:

Step 501: The terminal receives a configuration message of the serving cell. The configuration message includes a system message and an RRC message.

The serving cell can be any cell that can cover the current location of the terminal. The configuration message can include system messages and RRC (Radio Resource Control) messages issued by the base station for the serving cell.

Step 502: The terminal updates the initial frequency band list corresponding to the network type according to the configuration message to obtain the frequency band list.

The initial frequency band list may be a frequency band list used in the latest cell selection process, or the initial frequency band list may be a default frequency band list.

For example, if the terminal selects a cell for the first time, the initial frequency band list is the default frequency band list corresponding to the network type. If the terminal does not select a cell for the first time, the initial frequency band list is used by the terminal in the most recent cell selection process. The list of frequency bands corresponding to this network type.

Among them, the default frequency band list can be determined based on the hardware support capabilities of the terminal and the network capabilities of the operator corresponding to the network type. The default frequency band list can include frequency band identifiers of each candidate frequency band, and each frequency band identifier is based on the bandwidth corresponding to the candidate frequency band. The values are arranged in descending order. Here, the bandwidth value corresponding to the candidate frequency band can be manually preset network experience data.

For example, in the default frequency band list, under the LTE network type, the bandwidth value of the candidate frequency band with frequency band number 66 is configured as 100MHz, the bandwidth value of the candidate frequency band with frequency band number 2 is configured as 80MHz, and the bandwidth value of the candidate frequency band with frequency band number 12 is configured The value is configured as 70MHz, etc.

In this way, since the network configuration changes dynamically, during the first cell selection process, the terminal determines the current actual bandwidth value of the candidate frequency band through the configuration message to update the default frequency band list, specifically each frequency band in the default frequency band list. The sorting order of the identification is updated to obtain the frequency band list used for the first cell selection; during the second cell selection process, the terminal updates the frequency band list used for the first cell selection based on the latest actual bandwidth value of the candidate frequency band, and obtains The frequency band list used in the second cell selection, and so on, to achieve dynamic updating of the frequency band list.

The following describes the process in which the terminal updates the initial frequency band list corresponding to the network type according to the configuration message and obtains the frequency band list. Referring to Figure 6, step 502 may include steps 601 and 602 shown in Figure 6:

Step 601: The terminal updates the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message.

For example, the terminal can determine the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message; if the initial frequency band list includes the frequency band identifier of the target frequency band, the terminal compares the bandwidth update value with the bandwidth value corresponding to the target frequency band in the initial frequency band list. Perform weighted sum processing, and use the result of the weighted sum processing to replace the bandwidth value corresponding to the target frequency band in the initial frequency band list; if the initial frequency band list does not include the frequency band identifier of the target frequency band, the terminal adds the target frequency band to the initial frequency band list. Frequency band identification, and use the bandwidth update value as the bandwidth value corresponding to the target frequency band.

Among them, carrier aggregation (carrier aggregation is a technology that combines two or more carriers to improve the data transmission capacity of the network. In LTE, 5 carriers can be aggregated to provide a bandwidth capacity of up to 100MHz, and in NR, up to 16 carriers can be aggregated. In the case of MR-DC (Multi-RAT Dual Connectivity, multi-radio access technology dual connectivity), the target frequency band corresponding to the serving cell is the frequency band of the main cell PCell. The target frequency band corresponding to the cell is the MCG frequency band. The terminal can determine the carrier aggregation or MR-DC situation according to the configuration message issued by the base station.

As an implementation manner, the initial frequency band list may include an initial tuple corresponding to each candidate frequency band, and the initial tuple may include a frequency band identifier and a bandwidth value of the corresponding candidate frequency band.

For example, continuing to take the network type as LTE, the initial frequency band list may include initial tuples (LTE,66,100), (LTE,2,80), etc., where (LTE,66,100) represents the frequency band number under the LTE network type. The bandwidth value of the candidate frequency band 66 is 100MHz, and the bandwidth value of the candidate frequency band (LTE,2,80) representing frequency band number 2 is 80MHz.

In a possible implementation, after the terminal determines the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message, it is assumed that the target frequency band is a candidate frequency band with frequency band number 66, that is, the frequency band that includes the target frequency band in the initial frequency band list identification, the terminal performs a weighted summation process on the bandwidth update value of the target frequency band determined according to the configuration message and the bandwidth value corresponding to the target frequency band in the initial frequency band list. The weighting coefficient between the bandwidth update value of the target frequency band and the bandwidth value corresponding to the target frequency band in the initial frequency band list can be set by yourself during implementation. For example, the weighting coefficient of the bandwidth value corresponding to the target frequency band can be set to be greater than the weighting of the bandwidth update value of the target frequency band. coefficients, and the sum of their weighted coefficients is 1. After the weighted summation process, the terminal uses the result of the weighted summation process to replace the bandwidth value corresponding to the target frequency band in the initial tuple corresponding to the candidate frequency band included in the initial frequency band list.

In another possible implementation, after the terminal determines the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message, it is assumed that the target frequency band is a candidate frequency band with frequency band number 12, that is, the target frequency band is not included in the initial frequency band list. The terminal adds the frequency band identifier of the target frequency band to the initial frequency band list, and uses the bandwidth update value (assumed to be 70MHz) as the bandwidth value corresponding to the target frequency band, that is, the initial tuple corresponding to the target frequency band is generated (LTE, 12 ,70).

In this way, the process of updating the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message is implemented.

The following describes the process in which the terminal determines the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message.

For different network types, the composition of the bandwidth update value of the target frequency band corresponding to the serving cell is also different. Taking the serving cell of LTE or SA as an example, the bandwidth update value of the target frequency band corresponding to the serving cell is composed of the sum of the bandwidths of the current carrier units in the serving cell. Taking the serving cell of NSA as an example, the bandwidth update value of the target frequency band corresponding to the serving cell is The bandwidth update value is the sum of the bandwidth of each carrier unit of the MCG corresponding to the serving cell and the bandwidth of each carrier unit of the SCG.

For example, referring to Figure 7, the terminal can perform step 701 and step 702 shown in Figure 7 to implement the process of determining the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message:

Step 701: The terminal obtains the cell bandwidth value corresponding to the target frequency band from the system message, and obtains the carrier aggregation bandwidth value corresponding to the target frequency band from the RRC message.

Step 702: The terminal determines the sum of the cell bandwidth value and the carrier aggregation bandwidth value as the bandwidth update value of the target frequency band.

The system message usually configures a fixed cell bandwidth value in the target frequency band for the serving cell. The RRC message configures the dynamically added bearer bandwidth, that is, the carrier aggregation bandwidth value, for the serving cell in the target frequency band. The terminal sets the cell bandwidth value. Added to the carrier aggregation bandwidth value, the overall bandwidth update value of the target frequency band is obtained.

Step 602: The terminal reorders the frequency band identifiers in the initial frequency band list based on the updated bandwidth value to obtain a frequency band list.

The terminal reorders the frequency band identifiers in the initial frequency band list in descending order of the updated bandwidth values to obtain an updated frequency band list.

Optionally, after the above step 501, that is, after the terminal receives the configuration message of the serving cell, the terminal can also detect whether the type of network corresponding to the serving cell is the network type of the network currently to be accessed. If so, the terminal performs step 502. , that is, the initial frequency band list corresponding to the network type is updated according to the configuration message to obtain the frequency band list. In this way, the initial frequency band list is updated only when the network type matches, which improves the data accuracy of the frequency band list.

Optionally, after the above step 501, the terminal can also detect whether the serving cell is a cell that has been successfully registered within the preset historical time period. Among the two endpoint times of the preset historical time period, the target endpoint time is close to the current time. The time interval between the current time and the current time is less than the preset time interval threshold. If so, the terminal performs the step of updating the initial frequency band list corresponding to the network type according to the configuration message to obtain the frequency band list.

The preset time interval threshold can be set by itself during implementation. For example, it can be set to 0, that is, the terminal detects whether the serving cell is a recently successfully registered cell. If so, it indicates that the serving cell is a known valid available cell, and the terminal then detects whether the serving cell is a cell that has been successfully registered recently. The configuration message updates the initial frequency band list corresponding to the network type, which can further improve the data accuracy of the frequency band list.

In one embodiment, a frequency band search method is provided, which method includes:

Step a: During the cell selection process, the terminal receives the configuration message of the serving cell. The configuration message includes system messages and RRC messages;

Step b: The terminal detects whether the serving cell is a cell that has been successfully registered within the preset historical time period;

Step c. If yes, the terminal detects whether the type of network corresponding to the serving cell is the network type of the network currently to be accessed;

Step d, if yes, the terminal obtains the cell bandwidth value corresponding to the target frequency band from the system message, and obtains the carrier aggregation bandwidth value corresponding to the target frequency band from the RRC message;

Step e: The terminal determines the sum of the cell bandwidth value and the carrier aggregation bandwidth value as the bandwidth update value of the target frequency band;

Step f, if the initial frequency band list includes the frequency band identifier of the target frequency band, the terminal performs a weighted summation process on the bandwidth update value and the bandwidth value corresponding to the target frequency band in the initial frequency band list, and replaces the initial frequency band list with the result of the weighted summation process. The bandwidth value corresponding to the target frequency band; wherein, the initial frequency band list is the frequency band list used in the most recent cell selection process, or the initial frequency band list is the default frequency band list;

Step g. If the initial frequency band list does not include the frequency band identifier of the target frequency band, the terminal adds the frequency band identifier of the target frequency band to the initial frequency band list and uses the bandwidth update value as the bandwidth value corresponding to the target frequency band;

Step h: The terminal reorders the frequency band identifiers in the initial frequency band list based on the updated bandwidth value to obtain the frequency band list;

Step i: The terminal determines the network type of the network currently to be accessed, and obtains a frequency band list corresponding to the network type. The frequency band list includes the frequency band identifiers of each candidate frequency band. The frequency band identifiers in the frequency band list are arranged in descending order according to the bandwidth value of the corresponding candidate frequency band. the order of arrangement;

Step j: The terminal performs frequency band searches on multiple candidate frequency bands in sequence according to the order of frequency band identifiers in the frequency band list until the target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by the terminal.

It should be understood that although the steps in the flowcharts involved in the above-mentioned embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the above embodiments may include multiple steps or stages. These steps or stages are not necessarily executed at the same time, but may be completed at different times. The execution order of these steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

Based on the same inventive concept, embodiments of the present application also provide a frequency band search device for implementing the above-mentioned frequency band search method. The solution to the problem provided by this device is similar to the solution recorded in the above method. Therefore, for the specific limitations in one or more embodiments of the frequency band search device provided below, please refer to the limitations on the frequency band search method mentioned above. I won’t go into details here.

In one embodiment, as shown in Figure 8, a frequency band search device is provided, including:

The determination module 801 is configured to determine multiple candidate frequency bands to be searched during the cell selection process. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell;

The search module 802 is configured to perform frequency band searches on the plurality of candidate frequency bands in sequence according to the frequency band search order determined based on the bandwidth value until a target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by terminals. .

In one embodiment, the determining module 801 includes:

A determining unit, used to determine the network type of the current network to be accessed;

An obtaining unit is configured to obtain a frequency band list corresponding to the network type, where the frequency band list includes frequency band identifiers of each of the candidate frequency bands.

In one embodiment, the determining module 801 further includes:

A receiving unit, configured to receive configuration messages of the serving cell, where the configuration messages include system messages and RRC messages;

An update unit, configured to update the initial frequency band list corresponding to the network type according to the configuration message to obtain the frequency band list.

In one embodiment, the initial frequency band list is a frequency band list used in the most recent cell selection process, or the initial frequency band list is a default frequency band list.

In one embodiment, the update unit is specifically configured to update the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message; and update the frequency band in the initial frequency band list based on the updated bandwidth value. The identifiers are reordered to obtain the frequency band list.

In one embodiment, the update unit is specifically configured to determine the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message; if the initial frequency band list includes the frequency band identifier of the target frequency band, then Perform a weighted summation process on the bandwidth update value and the bandwidth value corresponding to the target frequency band in the initial frequency band list, and use the result of the weighted summation process to replace the bandwidth value corresponding to the target frequency band in the initial frequency band list. ; If the initial frequency band list does not include the frequency band identifier of the target frequency band, then add the frequency band identifier of the target frequency band to the initial frequency band list, and use the bandwidth update value as the bandwidth corresponding to the target frequency band value.

In one embodiment, the update unit is specifically configured to obtain the cell bandwidth value corresponding to the target frequency band from the system message, and obtain the carrier aggregation bandwidth value corresponding to the target frequency band from the RRC message; The sum of the cell bandwidth value and the carrier aggregation bandwidth value is determined as the bandwidth update value of the target frequency band.

Each module in the above-mentioned frequency band search device can be realized in whole or in part by software, hardware and combinations thereof. Each of the above modules may be embedded in or independent of the processor of the computer device in the form of hardware, or may be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in Figure 9. The computer device includes a processor, memory, input/output interface, communication interface, display unit and input device. Among them, the processor, memory and input/output interface are connected through the system bus, and the communication interface, display unit and input device are connected to the system bus through the input/output interface. Wherein, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes non-volatile storage media and internal memory. The non-volatile storage medium stores operating systems and computer programs. This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used for wired or wireless communication with external terminals. The wireless mode can be implemented through WIFI, mobile cellular network, NFC (Near Field Communication) or other technologies. The computer program implements a frequency band search method when executed by the processor. The display unit of the computer equipment is used to form a visually visible picture, and may be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display or an electronic ink display. The input device of the computer device can be a touch layer covered on the display screen, or it can be a button, trackball or touch pad provided on the computer device casing, or it can be External keyboard, trackpad or mouse, etc.

Those skilled in the art can understand that the structure shown in Figure 9 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied. Specific computer equipment can May include more or fewer parts than shown, or combine certain parts, or have a different arrangement of parts.

An embodiment of the present application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of the frequency band search method.

An embodiment of the present application also provides a computer program product containing instructions that, when run on a computer, causes the computer to perform a frequency band search method.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage. In the media, when executed, the computer program may include the processes of the above method embodiments. Any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetic variable memory (Magnetoresistive Random Access Memory (MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory may include random access memory (Random Access Memory, RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in many forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM). The databases involved in the various embodiments provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include blockchain-based distributed databases, etc., but are not limited thereto. The processors involved in the various embodiments provided in this application may be general-purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to this.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims (20)

1. A frequency band search method, including:

   In the process of cell selection, multiple candidate frequency bands to be searched are determined, each of the candidate frequency bands includes multiple frequency points, and each of the frequency points corresponds to a different cell;

   Frequency band searches are performed on the plurality of candidate frequency bands in sequence according to a frequency band search sequence determined based on the bandwidth value until a target frequency band is searched, where the target frequency band includes frequency points corresponding to cells that can be accessed by terminals.
2. The method according to claim 1, wherein determining a plurality of candidate frequency bands to be searched includes:

   Determine the network type of the current network to be accessed;

   A frequency band list corresponding to the network type is obtained, and the frequency band list includes frequency band identifiers of each of the candidate frequency bands.
3. The method according to claim 2, wherein before obtaining the frequency band list corresponding to the network type, the method further includes:

   Receive configuration messages of the serving cell, where the configuration messages include system messages and RRC messages;

   The initial frequency band list corresponding to the network type is updated according to the configuration message to obtain the frequency band list.
4. The method according to claim 3, wherein the initial frequency band list is a frequency band list used in the most recent cell selection process, or the initial frequency band list is a default frequency band list.
5. The method according to claim 3, wherein updating the initial frequency band list corresponding to the network type according to the configuration message to obtain the frequency band list includes:

   Update the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message;

   The frequency band identifiers in the initial frequency band list are reordered based on the updated bandwidth value to obtain the frequency band list.
6. The method according to claim 5, wherein updating the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message includes:

   Determine the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message;

   If the initial frequency band list includes the frequency band identifier of the target frequency band, then perform a weighted summation process on the bandwidth update value and the bandwidth value corresponding to the target frequency band in the initial frequency band list, and use the weighted summation process. The result replaces the bandwidth value corresponding to the target frequency band in the initial frequency band list.
7. The method of claim 6, further comprising:

   If the initial frequency band list does not include the frequency band identifier of the target frequency band, then add the frequency band identifier of the target frequency band to the initial frequency band list, and use the bandwidth update value as the bandwidth value corresponding to the target frequency band. .
8. The method according to claim 6, wherein determining the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message includes:

   Obtain the cell bandwidth value corresponding to the target frequency band from the system message, and obtain the carrier aggregation bandwidth value corresponding to the target frequency band from the RRC message;

   The sum of the cell bandwidth value and the carrier aggregation bandwidth value is determined as the bandwidth update value of the target frequency band.
9. The method according to claim 1, wherein the frequency band search order is a descending order of bandwidth values corresponding to each of the candidate frequency bands.
10. A frequency band search device, which includes:

    A determination module, configured to determine multiple candidate frequency bands to be searched during the cell selection process. Each candidate frequency band includes multiple frequency points, and each frequency point corresponds to a different cell;

    The search module is configured to perform frequency band searches on the plurality of candidate frequency bands in sequence according to the frequency band search order determined based on the bandwidth value until a target frequency band is searched. The target frequency band includes frequency points corresponding to cells that can be accessed by terminals.
11. The device according to claim 10, wherein the determining module includes:

    A determining unit, used to determine the network type of the current network to be accessed;

    An obtaining unit is configured to obtain a frequency band list corresponding to the network type, where the frequency band list includes frequency band identifiers of each of the candidate frequency bands.
12. The device according to claim 11, wherein the determining module further includes:

    A receiving unit, configured to receive configuration messages of the serving cell, where the configuration messages include system messages and RRC messages;

    An update unit, configured to update the initial frequency band list corresponding to the network type according to the configuration message to obtain the frequency band list.
13. The device according to claim 12, wherein the initial frequency band list is a frequency band list used in a recent cell selection process, or the initial frequency band list is a default frequency band list.
14. The device according to claim 12, wherein the update unit is specifically configured to update the bandwidth value corresponding to the frequency band identifier in the initial frequency band list according to the configuration message; and update the initial frequency band based on the updated bandwidth value. The frequency band identifiers in the list are reordered to obtain the frequency band list.
15. The device according to claim 14, wherein the update unit is specifically configured to determine the bandwidth update value of the target frequency band corresponding to the serving cell according to the configuration message; if the initial frequency band list includes the bandwidth update value of the target frequency band frequency band identifier, perform a weighted summation process on the bandwidth update value and the bandwidth value corresponding to the target frequency band in the initial frequency band list, and use the result of the weighted summation process to replace the target frequency band in the initial frequency band list. the corresponding bandwidth value.
16. The device according to claim 15, wherein the updating unit is specifically configured to add a frequency band of the target frequency band to the initial frequency band list if the initial frequency band list does not include a frequency band identifier of the target frequency band. identification, and use the bandwidth update value as the bandwidth value corresponding to the target frequency band.
17. The device according to claim 15, wherein the update unit is specifically configured to obtain the cell bandwidth value corresponding to the target frequency band from the system message, and obtain the carrier corresponding to the target frequency band from the RRC message. Aggregation bandwidth value: determine the sum of the cell bandwidth value and the carrier aggregation bandwidth value as the bandwidth update value of the target frequency band.
18. An electronic device, including a memory and a processor. A computer program is stored in the memory. When the computer program is executed by the processor, the processor causes the processor to execute any one of claims 1 to 9. steps of the method.
19. A computer-readable storage medium having a computer program stored thereon, wherein the steps of the method according to any one of claims 1 to 9 are implemented when the computer program is executed by a processor.
20. A computer program product comprising a computer program, wherein the computer program implements the steps of the method of any one of claims 1 to 9 when executed by a processor.

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