CN110913440B

CN110913440B - Terminal module and method for selecting target operator in weak network scene

Info

Publication number: CN110913440B
Application number: CN201911042438.5A
Authority: CN
Inventors: 王胜瑾; 吴齐兵
Original assignee: Shenzhen Neoway Technology Co Ltd
Current assignee: Shenzhen Neoway Technology Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2022-02-18
Anticipated expiration: 2039-10-29
Also published as: CN110913440A

Abstract

The application provides a method for selecting a target operator in a weak network scene, which comprises the following steps: the terminal module scans available network cells of each operator in the nearby area by using the radio frequency capability of the terminal under the condition of no user identification card; performing signal measurement on the searched network cells available to each operator to obtain a signal measurement value; calculating a signal quality value of each operator according to the signal measurement value of the available network cell of each operator; selecting a target operator according to the signal quality value of each operator; and switching the subscriber identity module card to the target operator and executing network connection and registration. The application also provides a terminal module for selecting the target operator in the weak network scene. The method and the device can select the proper operator according to the signal quality situation of the local operator.

Description

Terminal module and method for selecting target operator in weak network scene

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a terminal module and a method for selecting a target operator in a weak network scenario.

Background

In the existing device residing process in a certain network cell, a base station authenticates authentication parameters of a Subscriber Identity Module (USIM) uploaded by the device to determine whether the current device supports residing in the network cell, and the authentication parameters are generally stored in the USIM, so that the device determines whether the current device currently has the Subscriber Identity Module before a registration process is started in many cases, and if no USIM device does not initiate a network registration process. However, in real life, the coverage rates of base stations of operators in various areas are different, for example, the coverage rate of the base station with china communication in some areas is high, the signal quality is good, the coverage rate of the base station moving in some areas is high, and the signal quality is good, so that the coverage rate of the base station of some operators in some areas, for example, underground parking lots, inside large shopping malls, dense areas of urban high buildings and other areas is low, the signal quality is poor, but the coverage rate of the base station of other operators is relatively high, and the signal quality is relatively good; in this case, the device needs to select a suitable operator to use the service according to the actual network situation.

Disclosure of Invention

In view of the above, it is desirable to provide a terminal module and a method for dynamically adapting network handover thereof to solve the above problems.

In a first aspect, a method for selecting a target operator in a weak network scenario disclosed in an embodiment of the present application includes:

the terminal module scans available network cells of each nearby operator by utilizing the radio frequency capability of the terminal module under the condition of no user identification card;

performing signal measurement on available network cells of each operator to obtain a signal measurement value;

calculating a signal quality value of each operator according to the signal measurement value of the available network cell of each operator;

selecting a target operator according to the signal quality value of each operator; and

and switching the user identification card to the target operator and executing network connection and registration.

In a second aspect, the terminal module for selecting a target operator in a weak network scenario disclosed in the embodiment of the present application includes a processor and a radio frequency unit, where the processor controls the radio frequency unit to scan available network cells of each nearby operator without a subscriber identity card, performs signal measurement on the available network cells of each operator to obtain a signal measurement value, calculates a signal quality value of each operator according to the signal measurement value of the available network cell of each operator, selects the target operator according to the signal quality value of each operator, and switches the subscriber identity card to the target operator and performs network connection and registration.

According to the terminal module and the dynamic self-adaptive network switching method thereof, the terminal module scans available network cells of each operator by utilizing the radio frequency capability of the terminal module under the condition of no user identification card; performing signal measurement on available network cells of each operator to obtain a signal measurement value; calculating a signal quality value of each operator according to the signal measurement value of the available network cell of each operator; selecting a target operator according to the signal quality value of each operator; and switching the subscriber identity module card to the target operator and executing network connection and registration. Through operator network signal instruction decision, the problem that equipment selects a proper operator in a special area with large operator signal quality difference is solved, and normal installation is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a flowchart illustrating a method for selecting a target operator in a weak network scenario in an embodiment of the present application.

Fig. 2 is a schematic module diagram of a terminal module for selecting a target operator in a weak network scenario in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or terminal that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or terminal.

The description which follows is a preferred embodiment for carrying out the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

Referring to fig. 1, fig. 1 is a flowchart illustrating a method for selecting a target operator in a weak network scenario according to an embodiment of the present application. The order of execution of the method is not limited to the order shown in fig. 1. The method comprises the following steps:

step 101, the terminal module scans the available network cells of each operator by using its own radio frequency capability without a subscriber identity module card.

Specifically, in the present embodiment, the operators include operators in China, specifically including China Mobile Communications Corporation, China Unicom and China Telecom (CT). It is understood that in other embodiments, the number and name of the operators may be changed when the method is applied to hong kong, australia, etc. and other countries in china, and is not limited herein.

Specifically, in this embodiment, the available network cells of each operator include, but are not limited to, available network cells of networks of generations of china mobile, such as available network cells of 4G networks, 3G networks and 2G networks of china mobile, available network cells of networks of generations of china unicom, such as available network cells of 4G networks, 3G networks and 2G networks of china unicom, and available network cells of networks of generations of china telecommunications, such as available network cells of 4G networks, 3G networks and 2G networks of china telecommunications. Of course, when a 5G network, a 6G network, or a faster network is popularized in the future, the available network cells of these networks may be included in the available network cells of the operators.

Specifically, in this embodiment, the subscriber identity module card is a global subscriber identity module card; the subscriber identity module card is provided with a write-in interface corresponding to each operator, for example, a write-in interface corresponding to China Mobile, a write-in interface corresponding to China Union and a write-in interface corresponding to China telecom. It is understood that in other embodiments, the subscriber identity card may be other types of identity cards, and is not limited thereto. In this embodiment, the subscriber identity module card may select a write interface of one operator to write when the terminal is turned on for the first time, and after the operator writes, the operator cannot be rewritten. It is understood that in other embodiments, the subscriber identity card may select a write interface of one operator for writing when the terminal is powered on for the first time, and after the operator writing is completed, the operator may be rewritten to another operator again. The situation that the terminal module does not have the subscriber identity module includes a situation that the terminal module does not load the subscriber identity module, a situation that the subscriber identity module of the terminal module is disabled, or a situation that the terminal module does not establish an electrical connection with the subscriber identity module, for example, the card is damaged.

The available network cell refers to a network cell capable of establishing a network connection with the terminal, and may be a serving cell currently establishing a network connection with the terminal, or may be a neighboring cell capable of establishing a network connection with the terminal, but the neighboring cell does not currently establish a network connection with the terminal. The network connection can be established between the terminal and the network, and the network transmission speed is greater than a preset threshold value.

Further, in one embodiment, before step 101, the method further includes:

step 100: judging whether the terminal module is loaded with a user identification card currently;

if not, the terminal module directly utilizes the radio frequency capability of the terminal module to scan the available network cells of each operator;

if yes, the terminal module disables the user identification card, and then scans the available network cells of each operator by using the radio frequency capability of the terminal module.

Further, in one embodiment, the determining whether the terminal module is currently loaded with the subscriber identity module includes:

when the terminal module is started, the terminal module checks the usability of the user identification card, and mainly judges whether the loading of the current user identification card is normal or not;

when the terminal module determines that the subscriber identity module is loaded normally, the terminal module determines that the subscriber identity module is loaded with the subscriber identity module currently, the terminal module disables the subscriber identity module firstly, and then scans available network cells of each operator by utilizing the radio frequency capability of the terminal module;

when the terminal module determines that the subscriber identity module is loaded abnormally, the terminal module includes the following conditions that the subscriber identity module is not currently loaded with the subscriber identity module, the terminal module is loaded with the identity module, but the subscriber identity module is abnormal or the connection is not good due to the fact that the subscriber identity module is not loaded in place, and at the moment, the terminal module directly scans available network cells of each operator by using the radio frequency capacity of the terminal module.

Further, in one embodiment, the radio frequency capability sets a function capable of transceiving electromagnetic wave signals. Step 101 further comprises:

when the terminal module receives the broadcast signaling periodically sent by the surrounding base stations on the broadcast channel through the radio frequency capability of the terminal module without a user identification card, the terminal module analyzes the signaling and determines the base stations sending the broadcast signaling as available network cells.

Further, in one embodiment, scanning available network cells of each operator includes:

the terminal module scans networks of all frequency bands, which can be supported by hardware of the terminal module, of all operators one by utilizing radio frequency capacity of the terminal module under the condition of no subscriber identity module, wherein the scanning process is about 5-7 seconds, available network cells, which can be supported by the hardware of the terminal module in the area where the current terminal module is located, of all operators are obtained, and an available network cell list is obtained.

Further, in one embodiment, the available network cell list stores data information of several available networks, and the data storage structure of each available network cell is as follows: { Rat, PLMN Size, { PLMN, Band Size, Band } }. The Rat is a network format, and the network format includes, but is not limited to, LTE (Long Term Evolution, 4G Communication technology), WCDMA (Wideband Code Division Multiple Access), GSM (Global System for Mobile Communication), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA (Code Division Multiple Access ), evdo (Evolution Data only), and the like. Wherein, plmn (public Land Mobile network) is a public Land Mobile network identifier; PLMN Size is the number of available operators. Wherein, Band is the frequency Band available in the current network, and Band Size is the number of the supported frequency bands.

Step 102, performing signal measurement on available network cells of each operator to obtain a signal measurement value.

Specifically, in one embodiment, the available network cells of each operator are polled to measure a signal measurement for each available network cell. It is to be understood that the signal measurements comprise at least one of the following characteristic signal strengths, in particular: RSSI (Received Signal Strength), RSRP (Reference Signal Received Power), RSCP (Received Signal Code Power), RSRQ (Reference Signal Received Quality), SINR (Signal to interference Noise Ratio), ECIO (Received Energy Per Chip and Interface Level), and Srxlev (cell selection Received Signal Strength). Wherein, in one embodiment, for a 4G network, the signal measurement value comprises RSRP, that is, the 4G network generally characterizes signal strength by RSRP; for 3G networks, the signal measurements comprise RSCP, that is, 3G networks typically characterize signal strength by RSCP; for 2G networks, the signal measurements include RSSI, that is, 2G networks typically characterize signal strength by RSSI.

Further, in one embodiment, polling the available network cells of each operator to measure the signal measurement value of each available network cell includes:

polling each available network cell in the list of available network cells for base station information for the available network cell based on the data storage structure of each available network cell in the list of available network cells, wherein the base station information includes at least a global cell identity and the signal measurement value.

Further, in one embodiment, the data storage structure of the base station information is specifically as follows:

the data storage structure of the available network cell of the 4G network is as follows:

LTE: { Cell ID, Earfcn, PCI, PLMN, RSRP, RSRQ, RSSI, SINR, Srxlev }, wherein Cell ID (Cell Identification) refers to a global Cell identity; earfcn refers to a frequency point under 4G; PCI (public Land Mobile network) refers to the physical cell identity, PLMN, RSRP, RSRQ, RSSI, SINR, Srxlev in LTE system and their explanation is the same as above, and not detailed.

The data storage structure of the available network cell of the 3G network is as follows:

WCDMA: { Cell ID, Freq, PSC, PLMN, RSCP, ECIO, Srxlev }, where Freq (frequency) refers to a frequency point; psc (primary Scrambling code) refers to a cell primary Scrambling code in a WCDMA system; cell ID, PLMN, RSCP, ECIO, Srxlev are explained above and not described in detail.

TD-SCDMA: { Cell ID, uarfcn, LAC, PLMN, Pathloss, timing _ advance, RSCP }, wherein uarfcn refers to a frequency point under 3G; LAC (location area code) refers to location area code; pathloss refers to path loss; timing _ advance refers to the timing advance; the Cell ID, PLMN and RSCP are explained above and will not be described in detail.

EVDO: { Channel, SINR, ECIO }, wherein Channel refers to a frequency point; SINR, ECIO is explained above and not further detailed.

The data storage structure of the available network cell of the 2G network is as follows:

GSM: { Cell ID, arfcn, LAC, PLMN, rx _ qual, RSSI, C1}, where arfcn (absolute Radio Frequency Channel number) refers to an absolute Radio Channel number; rx _ qual refers to the quality of the wireless signal received by the terminal module; c1 refers to the calculation result of C1 criterion under GSM. The Cell ID, LAC, PLMN and RSSI are explained as above and will not be described in detail.

CDMA: { Base ID, channel, SID, NID, PN, ECIO }, where Base ID refers to a basic identification Code, SID refers to a system identification Code, NID refers to a network identification Code, PN refers to a Pseudo-Noise Code, and in this application, refers to a pilot offset in a CDMA system. The ECIO is explained above and not described in detail.

It is understood that, in other embodiments, the data storage structure of the base station information may be different, and is specifically configured according to actual needs, and is not limited herein.

Further, in one embodiment, polling each available network cell in the available network cell list to obtain the base station information of the available network cell includes:

when polling each available network, firstly, the terminal module is set as the corresponding network type of the corresponding operator according to the data storage structure corresponding to the available network, and then the base station information of the available network cell is obtained.

Specifically, when polling each available network cell, first setting the terminal module as a corresponding network type of a corresponding operator according to a data storage structure corresponding to the available network cell, and then obtaining base station information of the available network cell, including:

the terminal module is set to be accessed into a designated available network cell, and controls the radio frequency of the terminal module to actively measure the network and measure the base station information of the available network cell.

Step 103, calculating the signal quality value of each operator according to the signal measurement value of the available network cell of each operator.

Specifically, in one embodiment, step 103 specifically includes, but is not limited to:

respectively calculating the signal quality values of the networks of the generations of the China Mobile according to the signal measurement values of the available network cells of the networks of the generations of the China Mobile, for example, respectively calculating the signal quality values of the networks of the China Mobile 4G, the 3G and the 2G according to the signal measurement values of the available network cells of the China Mobile 4G, the 3G and the 2G networks;

respectively calculating the signal quality value of each generation of the China Unicom network according to the signal measurement value of the available network cell of each generation of the China Unicom network, for example, respectively calculating the signal quality values of the China Unicom 4G network, the China Unicom 3G network and the China Unicom 2G network according to the signal measurement value of the available network cell of the China Unicom 4G network, the China Unicom 3G network and the China Unicom 2G network;

and respectively calculating the signal quality values of the networks of the generations of the China telecom according to the signal measurement values of the available network cells of the networks of the generations of the China telecom, for example, respectively calculating the signal quality values of the networks of the 4G, the 3G and the 2G of the China telecom according to the signal measurement values of the available network cells of the networks of the 4G, the 3G and the 2G of the China telecom.

It will be appreciated that in other embodiments, the signal quality value for each operator is calculated from signal measurements of the available network cells for each operator, including but not limited to:

further calculating the comprehensive signal quality value of the China Mobile according to the signal quality value of at least two generations of networks in the China Mobile networks, for example, further calculating the comprehensive signal quality value of the China Mobile according to the signal quality values of the 4G network and the 2G network in the China Mobile networks;

further calculating a comprehensive signal quality value of China Mobile according to the signal quality value of at least two generations of networks in the network of each generation of Unicom, for example, further calculating the comprehensive signal quality value of China Unicom according to the signal quality values of a 4G network and a 3G network in the network of each generation of Unicom;

and further calculating the comprehensive signal quality value of China Mobile according to the signal quality value of at least two generation networks in the networks of the generations of China telecom, for example, further calculating the comprehensive signal quality value of China telecom according to the signal quality values of a 4G network and a 2G network in the networks of the generations of China telecom.

It is understood that when calculating the above-mentioned overall quality value, different weights may be assigned to each generation of network, for example, a signal quality value of a 4G network, a signal quality value of a 3G network, and a signal quality value of a 2G network may be assigned to a corresponding weight, and in one embodiment, a signal quality value of a 4G network, a signal quality value of a 3G network, and a signal quality value of a 2G network may be assigned to a corresponding weight of 0.7, 0.1, and 0.2, respectively. Thus, the integrated signal quality value is 0.7 × 4G network signal quality value +0.1 × 3G network signal quality value +0.2 × 2G network signal quality value. It is understood that, in other embodiments, the above-mentioned weight may be set according to actual needs, and is not limited specifically.

calculating the comprehensive signal quality value of the China Mobile according to the signal measurement value of the available network cell of at least two generation networks in the networks of the China Mobile, for example, calculating the comprehensive signal quality value of the China Mobile according to the signal measurement value of the available network cell of at least two generation networks in the 4G network, the 3G network and the 2G network of the China Mobile;

calculating a combined signal quality value of china mobile according to signal measurement values of available network cells of at least two generation networks in networks of each generation of china unicom, for example, calculating a combined signal quality value of china unicom according to signal measurement values of available network cells of at least two generation networks in 4G networks, 3G networks and 2G networks of china unicom;

the integrated signal quality value of the China Mobile is calculated according to the signal measurement values of the available network cells of at least two generation networks in the networks of the generations of China telecom, for example, the integrated signal quality value of the China telecom is calculated according to the signal measurement values of the available network cells of at least two generation networks in the 4G network, the 3G network and the 2G network of the China telecom.

Further, in one embodiment, for a 4G network, the signal measurement values include a reference signal received strength and a cell selection received signal strength value, and the calculating the signal quality value for each operator based on the signal measurement values of the available network cells of each operator includes:

dividing the available network cells of the 4G network of each operator into a plurality of different categories according to the magnitude of the reference signal receiving intensity through a classification algorithm, and endowing different quality weights to the available network cells of different categories, wherein the classification algorithm comprises but is not limited to a naive Bayes network, a Bayesian belief network, a random forest, a k-nearest neighbor classification and the like;

giving a corresponding network comprehensive weight value to each available network cell according to the signal-to-noise ratio of each available network cell;

calculating a composite value for each available network cell based on the reference signal received strength of each available network cell, the network composite weight, and the radio cell signal strength metric value, wherein, in one embodiment, the composite value is the product of the reference signal received strength and the network composite weight and the sum of the cell selection received signal strength value and a ratio between 10; in other embodiments, the calculation formula of the integrated value is not limited thereto.

And calculating the signal quality value of the 4G network according to the comprehensive value of each available network cell and the corresponding quality weight.

For example, the available network cells of the 4G network for the china mobile are classified into three classes, i.e. better a, medium B and poor C, by a classification algorithm according to the magnitude of the reference signal received strength, and different quality weights are assigned to the available network cells of different classes, for example, the weight assigned to the class is a: 0.6, B: 0.3, 0.1 of C;

in an embodiment, the network integrated weight depends on the snr parameter, and the SINR parameter is used in a 4G network, so that the weighting criteria of the network integrated weight are as follows:

calculating a composite value Z for each available network cell, wherein the composite value Z is equal to the sum of the product of the reference signal received strength and the network composite weight and the ratio between the cell selection received signal strength value and 10, e.g., the composite value for each available network cell is S:

S＝RSRP*w+Srxlev/10；

wherein, RSRP is the reference signal received strength, and Srxlev is the cell selection received signal strength value.

The average value Z of the combined values of the available network cells of each category is calculated separately, e.g. the average value of the combined values S of the available network cells of category a is

(i ═ 0.. n, n denotes the total).

And calculating a signal quality value E according to the average value Z of the comprehensive values of all the categories and the quality weight value corresponding to the category, wherein E is Z1A + Z2B + Z3C

Further, in one embodiment, for a 3G network, the signal measurements include received signal chip strength and cell selection received signal strength values, and calculating a signal quality value for each operator based on the signal measurements of the available network cells of each operator comprises:

dividing the available network cells of the 3G network of each operator into a plurality of different categories by a classification algorithm according to the intensity of the received signal chips, and endowing different quality weights to the available network cells of different categories;

calculating a composite value for each available network cell based on the received signal chip strength for each available network cell and the network composite weight, wherein, in one embodiment, the composite value is the product of the received signal chip strength and the network composite weight; in other embodiments, the calculation formula of the integrated value is not limited thereto.

And calculating the signal quality value of the 3G network according to the comprehensive value of each available network cell and the corresponding quality weight.

For example, the available network cells of the 3G network moving in china are classified into three classes, i.e. better a, medium B and poor C, by a classification algorithm according to the magnitude of the reference signal received strength, and different quality weights are assigned to the available network cells of different classes, for example, the weight assigned to the class is a: 0.6, B: 0.3, 0.1 of C; it is understood that in other embodiments, the quality weight may be set according to actual needs, and is not limited herein.

in an embodiment, the network integrated weight depends on the snr parameter, and the ECIO parameter is used in the 3G network, so the weighting criteria of the network integrated weight are as follows:

a composite value Z for each available network cell is calculated, where the composite value Z is the product of the received signal chip strength and the network composite weight and the sum of the ratio between the cell selection received signal strength value and 10, e.g., the composite value for each available network cell is S:

s ═ RSCP × w; where RSCP is the received signal chip strength.

(i ═ 0.. n, n denotes the total).

And calculating a signal quality value E according to the average value Z of the comprehensive values of all the categories and the quality weight value corresponding to the category, wherein E is Z1A + Z2B + Z3C.

Further, in one embodiment, for a 2G network, the signal measurement values include received signal strength and cell selection received signal strength values, and calculating a signal quality value for each operator based on the signal measurement values for the available network cells of each operator comprises:

dividing the available network cells of the 2G network of each operator into a plurality of different categories according to the intensity of the received signals by a classification algorithm, and endowing different quality weights for the available network cells of different categories;

calculating a composite value for each available network cell based on the received signal strength of each available network cell, the network composite weight, and the cell weighted value, wherein, in one embodiment, the composite value is the product of the received signal strength and the network composite weight and the sum of the cell weighted values; in other embodiments, the calculation formula of the integrated value is not limited thereto.

And calculating the signal quality value of the 2G network according to the comprehensive value of each available network cell and the corresponding quality weight.

For example, the available network cells of the 2G network moving in china are classified into three classes, i.e. better a, medium B and poor C, by a classification algorithm according to the strength of the received signal, and different quality weights are assigned to the available network cells of different classes, for example, the weight assigned to the class is a: 0.6, B: 0.3, 0.1 of C; it is understood that in other embodiments, the quality weight may be set according to actual needs, and is not limited herein.

Giving a corresponding network comprehensive weight value to each available network cell according to the signal-to-noise ratio of each available network cell, wherein the network comprehensive weight value depends on a signal-to-noise ratio parameter, and the network comprehensive weight values under the 2G network are all 1;

a composite value Z for each available network cell is calculated, where the composite value Z is the sum of the product of the received signal strength and the weight value and the ratio between the cell selection received signal strength value and 10, e.g., the composite value for each available network cell is S:

s ═ RSSI × w + E; wherein, RSSI is the received signal strength; e denotes cell weighting, expressed as C1 criterion value in GSM and as Tx _ adj adaptation parameter in CDMA.

(i ═ 0.. n, n denotes the total).

And calculating a signal quality value E according to the average value Z of the comprehensive values of each category and the quality weight value corresponding to the category, wherein E is Z1A + Z2B + Z3C.

Step 104, selecting a target operator according to the signal quality value of each operator.

Specifically, in one embodiment, selecting a target operator based on the signal quality value of each operator includes:

and determining the operator with the maximum signal quality value of at least one generation network in the networks of the generations in the operators or the maximum integrated signal measurement value of at least one generation network as the target operator.

Further, in one embodiment, selecting a target operator based on the signal quality value of each operator includes:

and when the absolute value of the difference value of the signal quality values of the two operators is smaller than a preset threshold value, determining the target operator according to a preset priority rule before each operator. For example, in one embodiment, under the 4G network, the priority of three operators is china mobile > china telecom > china unicom. For example, when the signal quality values of the 4G networks of the chinese telecom and the chinese mobile are close, the chinese mobile is preferentially selected as the target operator; under the condition that signal quality values of China telecom and China Unicom 4G networks are close, China telecom is preferentially selected as a target operator; however, under the condition that the signal quality values of the 4G networks of China Mobile and China Unicom are close, the signal quality values of the 2G networks and/or the 3G networks of China Mobile and China Unicom need to be further compared, and China Mobile or China Unicom is comprehensively judged and selected as a target operator; that is, under the condition that the signal quality values of the 4G networks in china mobile and china unicom are close to each other, the selection of china mobile or china unicom as the target operator needs to be judged according to the integrated signal quality value of china mobile and china unicom. Selecting China Mobile as a target operator when the quality value of the comprehensive signal of China Mobile is greater than that of China Unicom; and conversely, when the quality value of the China Unicom comprehensive signal is greater than that of the China Mobile comprehensive signal, selecting the China Unicom as the target operator.

The signal quality value being close means that the absolute value of the difference between the signal quality values of the two operators is smaller than a preset threshold, for example, 2.

And 105, switching the user identification card to the target operator and executing network connection and registration.

Specifically, the terminal module switches the subscriber identity module to the format of the target operator, activates the code number of the target operator, and performs network connection and registration.

Therefore, when the terminal module is in a weak network environment, the terminal module can scan the available network cells of each operator by utilizing the radio frequency capability of the terminal module without a subscriber identity module; performing signal measurement on available network cells of each operator to obtain a signal measurement value; calculating a signal quality value for each operator based on the signal measurements of the available websites of each operator; selecting a target operator according to the signal quality value of each operator; and switching the user identification card to the target operator and executing network connection and registration, thereby ensuring normal use of the terminal module in the weak network environment.

Referring to fig. 2, fig. 2 is a block diagram illustrating a terminal module 100 for selecting a target operator in a weak network scenario according to an embodiment of the present application. The terminal module 100 may be a network module installed on an electronic device, and the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a monitoring device for public environment monitoring, and the like. When the terminal module 100 is used for a monitoring device, the monitoring device is in a weak network environment when installed in an underground parking lot, a movie theater, or the like. Specifically, the terminal module 100 includes a processor 10, a radio frequency unit 20, a subscriber identification card 30, and a storage unit 40. The processor 10 may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or a general purpose processor, any conventional processor, or the like. The memory unit 40 may include a high speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), a plurality of magnetic disk storage devices, a Flash memory device, or other volatile solid state storage devices. The storage unit is used for storing various data to be stored. The radio frequency unit 20 and the storage unit 40 are electrically connected to the processor 10, respectively. When the user identification card 30 is mounted on the terminal module 100, the user identification card 30 is electrically connected to the processor 10, and the processor 10 can read and write the user identification card 30. The storage unit 40 stores a computer program operable on the processor 10, and the processor 10 executes the computer program to perform the steps of: the radio frequency unit 20 is controlled to scan the available network cells of each operator without the subscriber identity card 30.

Further, in one embodiment, the processor 10 executes the computer program to perform the steps of:

firstly, judging whether the terminal module 100 is loaded with the user identification card 30 currently;

if not, the processor 10 controls the radio frequency unit 20 to scan available network cells of each operator;

if yes, the processor 10 controls to disable the subscriber identity card 30 first, and then controls the radio frequency unit 20 to scan the available network cells of each operator.

Further, in one embodiment, when the processor 10 runs the computer program, the executing step first determines whether the terminal module 100 is currently loaded with the subscriber identity card 30, including:

when the terminal module 100 is powered on, firstly, the usability of the user identification card 30 is checked, which mainly includes judging whether the loading of the current user identification card 30 is normal;

when it is determined that the subscriber identity module 30 is loaded normally, determining that the subscriber identity module 30 is loaded in the current terminal module 100, disabling the subscriber identity module 30, and then controlling the radio frequency unit 20 to scan available network cells of each operator;

when determining that the user identification card 30 is loaded abnormally, the following conditions are included, the first is that the user identification card 30 is not currently installed in the terminal module 100, the second is that the user identification card 30 itself is abnormal although the terminal module 100 is loaded with the identification card, or the connection is not good due to the fact that the user identification card is not loaded, and at this time, the processor 10 executes the steps when running the computer program: the radio unit 20 is controlled to scan for available network cells of each operator.

Further, in one embodiment, the processor 10 executes the computer program to control the radio frequency unit 20 to scan available network cells of each operator, including:

when the radio frequency unit 20 is controlled to receive the broadcast signaling periodically sent by the surrounding base stations on the broadcast channel without the subscriber identity module card, the signaling is analyzed and the base stations sending the broadcast signaling are determined to be available network cells.

under the condition of no subscriber identity module 30, the radio frequency unit 20 is controlled to scan networks of all frequency bands of all operators which can be supported by the terminal module 100 hardware one by using its radio frequency capability, and the scanning process is about 5-7 seconds, so as to obtain available network cells of all operators which can be supported by the terminal module 100 hardware in the area where the terminal module 100 is located currently, and obtain an available network cell list.

Further, in one embodiment, the available network cell list stores data information of several available networks, and the data storage structure of each available network cell is as follows: { Rat, PLMN Size, { PLMN, Band Size, Band } }. The Rat is a network system, and the network system includes but is not limited to LTE (Long Term Evolution, 4G communication technology), WCDMA, GSM, TD-SCDMA, CDMA, EVDO, and the like.

The processor 10, when running the computer program, performs the steps of: signal measurements are made on the available network cells of each operator to derive signal measurement values.

Specifically, in one embodiment, the processor 10 executes the computer program to perform the following steps: the available network cells of each operator are polled to measure a signal measurement for each available network cell. It is to be understood that the signal measurements comprise at least one of the following characteristic signal strengths, in particular: RSSI, RSRP, RSCP, RSRQ, SINR, ECIO, and Srxlev.

Further, in one embodiment, the processor 10, when executing the computer program, performs the steps of polling the available network cells of each operator to measure the signal measurement value of each available network cell, including:

polling each available network cell in the available network cell list for measurement based on a data storage structure of each available network cell in the available network cell list to obtain base station information of the available network cell, wherein the base station information at least comprises a global cell identity and the signal measurement value.

Further, in one embodiment, the processor 10 executes the computer program to poll each available network cell in the available network cell list to obtain the base station information of the available network cell, including:

when polling each available network, the terminal module 100 is first set to the corresponding network standard of the corresponding operator according to the data storage structure corresponding to the available network cell, and then obtains the base station information of the available network cell.

Specifically, when the processor 10 executes the steps to poll each available network cell when running the computer program, the method first sets the terminal module 100 as the corresponding network type of the corresponding operator according to the data storage structure corresponding to the available network cell, and then obtains the base station information of the available network cell, which includes:

the terminal module 100 is configured to access to a designated available network cell, and controls the radio frequency to perform active measurement on the network, and measures the base station information of the available network cell.

A signal quality value for each operator is calculated based on signal measurements of available network cells for each operator.

Specifically, in one embodiment, the processor 10 executes the computer program to calculate the signal quality value of each operator according to the signal measurement value of the available network cell of each operator, which includes but is not limited to:

It will be appreciated that in other embodiments, the processor 10 executing the computer program performs the step of calculating the signal quality value of each operator based on the signal measurements of the available network cells of each operator, further comprising:

It will be appreciated that in other embodiments the processor 10, when executing the computer program, performs the steps of calculating signal quality values for each operator based on signal measurements of available network cells for each operator, including but not limited to:

Further, in one embodiment, for a 4G network, where the signal measurement values include a reference signal received strength and a cell selection received signal strength value, the processor 10 when executing the computer program performs the steps of calculating a signal quality value for each operator based on the signal measurement values of the available network cells of each operator, including:

calculating a composite value for each available network cell based on the reference signal received strength of each available network cell, the network composite weight, and the radio cell signal strength metric value, wherein, in one embodiment, the composite value is the product of the reference signal received strength and the network composite weight and the sum of the cell selection received signal strength value and a ratio between 10; in other embodiments, the calculation formula of the integrated value is not limited thereto, and is not limited thereto.

For example, the processor 10 classifies the available network cells of the 4G network moving in china into three classes, i.e. better a, medium B and poor C, according to the magnitude of the reference signal received strength by using a classification algorithm, and assigns different quality weights to the available network cells of different classes, for example, the available network cells of classes are weighted as a: 0.6, B: 0.3, 0.1 of C;

S＝RSRP*w+Srxlev/10；

(i ═ 0.. n, n denotes the total).

Further, in one embodiment, for a 3G network, where the signal measurements include received signal chip strength and cell selection received signal strength values, the processor 10 when executing the computer program performs the steps of calculating signal quality values for each operator based on the signal measurements of the available network cells of each operator, including:

calculating a composite value for each available network cell based on the received signal chip strength for each available network cell and the network composite weight, wherein, in one embodiment, the composite value is the product of the received signal chip strength and the network composite weight; in other embodiments, the calculation formula of the integrated value is not limited thereto, and is not limited thereto.

For example, the processor 10 classifies the available network cells of the 3G network moving in china into three classes, i.e. better a, medium B and poor C, according to the magnitude of the reference signal received strength by using a classification algorithm, and assigns different quality weights to the available network cells of different classes, for example, the available network cells of classes are weighted as a: 0.6, B: 0.3, 0.1 of C; it is understood that in other embodiments, the quality weight may be set according to actual needs, and is not limited herein.

calculating a composite value Z for each available network cell, wherein the composite value Z is a product of the received signal chip strength and a network composite weight, e.g., the composite value for each available network cell is S:

S＝RSCP*w；

where RSCP is the received signal chip strength.

(i ═ 0.. n, n denotes the total).

Further, in one embodiment, for a 2G network, the signal measurement values include received signal strength and cell selection received signal strength values, and the processor 10 when executing the computer program performs the steps of calculating the signal quality value of each operator based on the signal measurement values of the available network cells of each operator, including:

calculating a composite value for each available network cell based on the received signal strength of each available network cell, the network composite weight, and the radio cell signal strength metric value, wherein, in one embodiment, the composite value Z is the product of the received signal strength and the network composite weight and the sum of the ratio between the cell selection received signal strength value and 10; in other embodiments, the calculation formula of the integrated value is not limited thereto, and is not limited thereto.

For example, the processor 10 classifies the available network cells of the 2G network moving in china into three classes, i.e. better a, medium B and poor C, according to the magnitude of the received signal strength by using a classification algorithm, and assigns different quality weights to the available network cells of different classes, for example, the available network cells of classes are weighted as a: 0.6, B: 0.3, 0.1 of C; it is understood that in other embodiments, the quality weight may be set according to actual needs, and is not limited herein.

the composite value Z is the product of the received signal strength and the weight value and the sum of the cell weighted values, for example, the composite value of each available network cell is S:

S＝RSSI*w+E；

wherein, RSSI is the received signal strength; e denotes cell weighting, expressed as C1 criterion value in GSM and as Tx _ adj adaptation parameter in CDMA.

(i ═ 0.. n, n denotes the total).

The processor 10 selects a target operator based on the signal quality values of the operators.

Specifically, in one embodiment, the processor 10, when executing the computer program, performs the step of selecting a target operator according to the signal quality value of each operator, including:

It is to be understood that, in one embodiment, the processor 10, when executing the computer program, performs the step of selecting a target operator according to the signal quality value of each operator, and further includes:

and when the absolute value of the difference value of the signal quality values of the two operators is smaller than a preset threshold value, determining the target operator according to a preset priority rule before each operator, wherein the priority rule of the operators can be adjusted according to the actual network condition. For example, in a 4G network, the priority of the initial three operators of the device is china mobile > china telecom > china unicom, and the special region can be adaptively adjusted according to user definition. For example, when the signal quality values of the 4G networks of the chinese telecom and the chinese mobile are close, the chinese mobile is preferentially selected as the target operator; under the condition that signal quality values of China telecom and China Unicom 4G networks are close, China telecom is preferentially selected as a target operator; however, under the condition that the signal quality values of the 4G networks of China Mobile and China Unicom are close, the signal quality values of the 2G networks and/or the 3G networks of China Mobile and China Unicom need to be further compared, and China Mobile or China Unicom is comprehensively judged and selected as a target operator; that is, under the condition that the signal quality values of the 4G networks in china mobile and china unicom are close to each other, the selection of china mobile or china unicom as the target operator needs to be judged according to the integrated signal quality value of china mobile and china unicom. Selecting China Mobile as a target operator when the quality value of the comprehensive signal of China Mobile is greater than that of China Unicom; and conversely, when the quality value of the China Unicom comprehensive signal is greater than that of the China Mobile comprehensive signal, selecting the China Unicom as the target operator.

The processor 10 controls the subscriber identity card 30 to be handed over to the target operator and performs network connection and registration.

Specifically, when the processor 10 runs the computer program, the execution step controls the subscriber identity card 30 to be switched to the format of the target operator, the code number of the target operator is activated, and network connection and registration are performed.

Therefore, when the terminal module 100 is in a weak network environment, it is able to scan the available network cells of each operator by using its own radio frequency capability without the subscriber identity card 30; performing signal measurement on available network cells of each operator to obtain a signal measurement value; calculating a signal quality value for each operator based on the signal measurements of the available websites of each operator; selecting a target operator according to the signal quality value of each operator; and the subscriber identity module 30 is switched to the target operator and network connection and registration are performed, thereby ensuring normal use of the terminal module 100 in the weak network environment.

In the embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method for selecting a target operator in a weak network scenario, the method comprising:

judging whether the terminal module is loaded with the user identification card currently;

if not, the terminal module directly utilizes the radio frequency capability of the terminal module to scan the available network cells of each nearby operator;

if yes, the terminal module disables the subscriber identity module, and then scans available network cells of each nearby operator by using the radio frequency capability of the terminal module, including:

the terminal module scans networks of all frequency bands of all operators which can be supported by hardware of the terminal module one by utilizing the radio frequency capability of the terminal module under the condition of no user identification card, obtains available network cells of all operators which can be supported in the area where the current terminal module is located and obtains an available network cell list;

calculating a signal quality value of each operator according to the signal measurement value of the available network cell of each operator; and

selecting a target operator according to the signal quality value of each operator;

2. The method of claim 1, wherein the terminal module scans available network cells of each operator using its own radio frequency capability without a subscriber identity card, comprising:

when the terminal receives the broadcast signaling periodically sent by the surrounding base station on the broadcast channel through the radio frequency capability of the terminal without a user identification card, the signaling is analyzed and the base station sending the broadcast signaling is determined to be an available network cell.

3. The method of claim 1, wherein performing signal measurements on available network cells of each operator to obtain signal measurements comprises:

4. The method of claim 3, wherein polling each available network cell in the list of available network cells for base station information of the available network cell comprises:

when polling each available network cell, firstly, the terminal module is set as the corresponding network type of the corresponding operator according to the data storage structure corresponding to the available network cell, and then the base station information of the available network cell is obtained.

5. The method of claim 3, wherein calculating a signal quality value for each operator based on signal measurements of available network cells for each operator comprises:

and respectively calculating the signal quality value of each generation of network of each operator according to the signal measurement value of the available network cell of each operator.

6. The method of claim 5, wherein the signal measurements include reference signal received strength and radio cell signal strength metric values, and wherein for a 4G network, the signal quality values for each generation of network of each operator are calculated based on the signal measurements of the available network cells of each operator, respectively, comprises:

dividing all available network cells of the 4G network of each operator into a plurality of different categories by a classification algorithm according to the size of the signal measurement value, and endowing different quality weights for the available network cells of different categories;

endowing each available network cell with a corresponding network comprehensive weight according to the signal-to-noise ratio parameter of each available network cell;

calculating a comprehensive value of each available network cell based on the reference signal receiving strength, the network comprehensive weight and the wireless cell signal strength metric value of each available network cell;

7. The method of claim 5, wherein the signal measurements comprise received signal chip strength and radio cell signal strength metric values, and wherein for a 3G network, the signal quality values for each generation of networks of each operator are calculated from the signal measurements of the available network cells of each operator, respectively, comprising:

dividing all available network cells of the 3G network of each operator into a plurality of different categories by a classification algorithm according to the size of the signal measurement value, and endowing different quality weights for the available network cells of different categories;

calculating a comprehensive value of each available network cell based on the received signal chip strength and the network comprehensive weight of each available network cell;

8. The method of claim 5, wherein the signal measurements comprise received signal strength and radio cell signal strength metric values, and wherein for a 2G network, the signal quality values for each generation of network of each operator are calculated based on the signal measurements of the available network cells of each operator, respectively, comprises:

dividing all available network cells of the 2G network of each operator into a plurality of different categories by a classification algorithm according to the size of the signal measurement value, and endowing different quality weights for the available network cells of different categories;

calculating the comprehensive value of each available network cell based on the received signal strength, the network comprehensive weight and the cell weighted value of each available network cell;

9. The method of claim 5, wherein selecting a target operator based on the signal quality value of each operator comprises:

10. The method of claim 9, wherein selecting a target operator based on the signal quality value of each operator comprises:

and when the absolute value of the difference value of the signal quality values of the two operators is smaller than a preset threshold value, determining the target operator according to a preset priority rule before each operator.

11. A terminal module for selecting a target operator in a weak network scene is characterized in that the terminal module comprises a processor, a storage unit and a radio frequency unit, the storage unit and the radio frequency unit are respectively and electrically connected with the processor, the storage unit stores a computer program capable of running on the processor, and the processor executes the following steps when running the computer program:

the terminal module scans networks of all frequency bands of all operators which can be supported by hardware of the terminal module one by utilizing the radio frequency capability of the terminal module under the condition of no user identification card, obtains available network cells of all operators which can be supported in the area where the current terminal module is located and obtains an available network cell list; performing signal measurement on available network cells of each operator to obtain a signal measurement value;

and selecting a target operator according to the signal quality value of each operator, switching the user identification card to the target operator, and executing network connection and registration.

12. The terminal module of claim 11, wherein the processor, when executing the computer program, performs the steps of performing signal measurements on available network cells of each operator to obtain signal measurement values, comprising:

13. The terminal module of claim 12, wherein the processor, when executing the computer program, performs the step of polling each available network cell in the list of available network cells for base station information of the available network cell, comprising:

14. The terminal module of claim 12, wherein the processor, when executing the computer program, performs the step of calculating a signal quality value for each operator based on signal measurements of available network cells of each operator, comprising:

15. The terminal module of claim 14, wherein the signal measurement values comprise reference signal received strength and radio cell signal strength metric values, and for a 4G network, the processor when executing the computer program performs the steps of calculating signal quality values of network generations of each operator according to the signal measurement values of the available network cells of each operator, respectively, comprising:

16. The terminal module of claim 14, wherein the signal measurements include received signal chip strength and radio cell signal strength metric values, and wherein for a 3G network, the processor when executing the computer program performs the steps of calculating signal quality values for each generation of network of each operator based on the signal measurements of the available network cells of each operator, respectively, comprising:

17. The terminal module of claim 14, wherein the signal measurements include received signal strength and radio cell signal strength metric values, and wherein for a 2G network, the processor when executing the computer program performs the steps of calculating signal quality values for each generation of network of each operator based on the signal measurements of the available network cells of each operator, respectively, comprising:

18. The terminal module of claim 14, wherein the processor, when executing the computer program, performs the step of selecting a target operator based on the signal quality value of each operator, comprising:

19. The terminal module of claim 18, wherein the processor, when executing the computer program, performs the step of selecting a target operator based on the signal quality value of each operator, comprising:

and when the absolute value of the difference value of the signal quality values of the two operators is smaller than a preset threshold value, the processor determines the target operator according to preset priority rules before each operator.