CN110191463B - Rapid access method of GSM network and related equipment - Google Patents

Rapid access method of GSM network and related equipment Download PDF

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CN110191463B
CN110191463B CN201910397671.9A CN201910397671A CN110191463B CN 110191463 B CN110191463 B CN 110191463B CN 201910397671 A CN201910397671 A CN 201910397671A CN 110191463 B CN110191463 B CN 110191463B
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digit
output value
imei code
gsm network
terminal
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CN110191463A (en
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俞斌
杨维琴
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Xiamen Reliable Intellectual Property Service Co ltd
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Huizhou TCL Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/009—Security arrangements; Authentication; Protecting privacy or anonymity specially adapted for networks, e.g. wireless sensor networks, ad-hoc networks, RFID networks or cloud networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Abstract

The invention provides a rapid access method of a GSM network and related equipment thereof, which are characterized in that when monitoring the request information of a terminal accessing the GSM network, the IMEI code carried in the request information is acquired; according to each digit contained in the IMEI code and the operation form corresponding to each preset digit, finding out the output value of each digit in the corresponding operation form from the storage space to obtain the final output value corresponding to the IMEI code; and verifying the IMEI code according to the searched final output value, and if the IMEI code is successfully verified, controlling the terminal to be accessed into a GSM network. The method and the related equipment provided by the invention convert the original operation process of each digit on the IMEI code into the process of inquiring the operation result, reduce the operation amount, improve the authentication efficiency of the IMEI code of the terminal, reduce the validation time and provide convenience for a user to use the terminal access network.

Description

Rapid access method of GSM network and related equipment
Technical Field
The invention relates to the technical field of mobile terminal communication, in particular to a quick access method of a GSM network and related equipment.
Background
GSM (Global System for Mobile Communication) is currently the most widely used Mobile phone standard. GSM differs from its previous standard most in that its signaling and voice channels are digital, and is therefore considered a second generation (2G) mobile telephone system. GSM, the first digital mobile communications standard established by the european telecommunications standards institute ETSI, is a global system for mobile communications whose air interface employs time division multiple access techniques. Since the mid-90 s, the investors were adopted by more than 100 countries worldwide. GSM standard devices account for over 80% of the current global cellular mobile communications device market. The main advantage of GSM from a user point of view is that the user can choose between higher digital speech quality and low cost short messages. An advantage of network operators is that they can customize their device configurations to different customers, since GSM as an open standard provides easier interoperability. Thus, the standards allow network operators to provide roaming services, and subscribers can use their mobile phones globally. GSM was a standard that was developed continuously and remains backward compatible with the original GSM phone, for example the message switching capability was added to the Release' 97 version of the standard, namely GPRS. High speed data exchange was also introduced only in Release' 99 standard, mainly EDGE and UMTS standards.
When the mobile terminal registers in the GSM network, the base station acquires the IMEI code from the mobile terminal, and then checks whether registration is allowed, in order to ensure that no error occurs in the wireless data transmission process, the IMEI code needs to be checked, and generally, the code is long, and a certain time is often required until transmission is completed, so that the registration time is delayed slightly.
Therefore, the prior art has defects and needs to be improved and developed.
Disclosure of Invention
In view of the above disadvantages in the prior art, the present invention aims to provide a fast access method for a GSM network and related devices for users, and overcome the drawback of slow access efficiency of the GSM network in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
one embodiment provided by the invention is a quick access method of a GSM network, wherein the method comprises the following steps:
A. when monitoring a request message for accessing a terminal to a GSM network, acquiring an IMEI code carried in the request message;
B. according to each digit contained in the IMEI code and the operation form corresponding to each preset digit, finding out the output value of each digit in the corresponding operation form from the storage space to obtain the final output value corresponding to the IMEI code;
C. and verifying the IMEI code according to the searched final output value, and if the IMEI code is successfully verified, controlling the terminal to be accessed into a GSM network.
Optionally, the step B includes:
sequentially searching the operation form corresponding to the current digit, the output value of the previous digit and the output value associated with the current digit from the storage space until the output value of the penultimate digit of the IMEI code is searched; and the output value of the last-but-one digit of the IMEI code is the final output value.
Optionally, before the step a, the method further includes:
opening a plurality of first-level storage units in a storage space; the plurality of first-level storage units are respectively used for storing first-level output values related to first digits of different numerical values and input operation forms corresponding to the first digits;
opening up a plurality of secondary storage units in the plurality of primary storage units; the plurality of secondary storage units are respectively used for storing second-level output values related to input operation forms corresponding to second digits of different numerical values, the first-level output values and the second digits;
opening a plurality of N + 1-level storage units in the plurality of Nth-level storage units in sequence; the N + 1-level storage units are respectively used for storing the N + 1-level output values associated with the input operation forms corresponding to the N-th digit, the N-th-level output value and the N + 1-th digit of different numerical values; wherein N is a natural number.
Optionally, the operation form corresponding to each number included in the IMEI code is the same operation form.
Optionally, the operation form corresponding to each number included in the IMEI code corresponds to the order in which the number is located, the operation form corresponding to the number located in the even number is the same operation form, and the operation form corresponding to the number located in the odd number is the same operation form.
Optionally, the method further includes:
sequentially finding out output values of each digit in the corresponding operation form from the storage space, and storing each output value in a cache space;
and acquiring an output value of the previous digit in the corresponding operation form from the cache space, and searching an output value of the next digit in the corresponding operation form according to the acquired output value of the previous digit in the corresponding operation form.
Optionally, step a further includes:
when the terminal is started or exits from a flight mode, detecting and sequencing signal intensities corresponding to each frequency band network and each frequency band network which can be accessed by the terminal;
when the signal intensity arrangement of the GSM network is first, or when the fact that the terminal is only accessed to the GSM network is monitored, the IMEI code carried in the request information of the terminal for accessing the GSM network is obtained.
Another embodiment provided by the present invention is a fast access system of a GSM network, wherein the fast access system comprises:
the terminal comprises an identification code acquisition module, a terminal access GSM network acquisition module and a GSM network access module, wherein the identification code acquisition module is used for acquiring an IMEI code carried in request information when the request information that the terminal accesses the GSM network is monitored;
the result searching module is used for searching output values of all the digits under the corresponding operation forms from the storage space according to all the digits contained in the IMEI code and the operation forms corresponding to the preset digits to obtain the final output values corresponding to the IMEI code;
and the access control module is used for verifying the IMEI code according to the searched final output value, and if the IMEI code is successfully verified, the access control module controls the terminal to access the GSM network.
9. A server comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the method of any one of claims 1 to 7.
Another embodiment provided by the invention is a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, carries out the steps of the method.
The method has the advantages that the method monitors the request information of the terminal accessing the GSM network, and sequentially searches the output value of the number and the input operation form corresponding to the number from the storage space according to the arrangement sequence of the IMEI code of the terminal containing the number after the request information is obtained; calculating the validation value of the terminal by utilizing an IMEI validation code algorithm according to each searched output value; and comparing the calculated validation value with the last check code of the IMEI code of the terminal, and if the validation value is equal to the last check code of the IMEI code of the terminal, controlling the terminal to access the GSM network. According to the method and the related equipment provided by the invention, the results of possible input operation modes of the IMEI code of the terminal are stored in the storage unit in advance, and after the IMEI code of the terminal needs to be acquired, the operation result is directly inquired from the storage unit according to the acquired operation mode of each digit on the IMEI code, so that the original operation process of each digit on the IMEI code is converted into the process of inquiring the operation result, the operation amount is reduced, the authentication efficiency of the IMEI code of the terminal is improved, the validation time is reduced, and convenience is provided for a user to use a terminal access network.
Drawings
FIG. 1 is a flow chart of steps of a fast access method for a GSM network according to the present invention;
FIG. 2 is a schematic block diagram of a quick access apparatus of a GSM network according to the present invention;
fig. 3 is a functional block diagram of the server of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The IMEI code (International Mobile Equipment Identity) is an "electronic serial number" consisting of 15 digits, which corresponds one-to-one to each Mobile telephone, and is unique worldwide. Each mobile telephone, when assembled, is assigned a globally unique set of numbers that are recorded from manufacture to delivery by the manufacturer. The IMEI code consists of 15 digits, where the first 6 digits are the "model approval number", which generally represents the model, followed by 2 digits: the "last assembly number", which generally represents the place of origin, followed by 6 digits as the "string number", the general code production sequence number, and the last 1 digit as the "0", which is the validation code.
The invention provides a quick access method of a GSM network, as shown in figure 1, the method comprises the following steps:
step S1, when monitoring the request information of terminal accessing GSM network, obtaining the IMEI code carried in the request information.
When the terminal sends a request message for accessing the GSM network to the authentication server, the authentication server acquires the IMEI code contained in the request message, starts to verify the IMEI code of the terminal, and controls to access the GSM network when the IMEI code passes the verification.
Specifically, in this step, step S2 may be executed only when all the terminal IMEI codes are acquired, or step S2 may be started after the first digit of the terminal IMEI code is acquired.
Step S2, according to each number included in the IMEI code and the operation form corresponding to each preset number, finding out the output value of each number in the corresponding operation form from the storage space, and obtaining the final output value corresponding to the IMEI code.
Specifically, the method for obtaining the final output value in this step is as follows: sequentially searching the operation form corresponding to the current digit, the output value of the previous digit and the output value associated with the current digit from the storage space until the output value of the penultimate digit of the IMEI code is searched; and the output value of the last-but-one digit of the IMEI code is the final output value.
After the IMEI code of the terminal is obtained, the input operation mode corresponding to the first digit of the IMEI code of the terminal is obtained, and the operation result of the digit and the input operation mode corresponding to the digit is searched from the storage unit according to the numerical value of the first digit and the input operation mode corresponding to the digit.
In order to implement smooth proceeding of the above query steps, the method further includes:
opening a plurality of first-level storage units in a storage space; the plurality of first-level storage units are respectively used for storing first-level output values related to first digits of different numerical values and input operation forms corresponding to the first digits;
opening up a plurality of secondary storage units in the plurality of primary storage units; the plurality of secondary storage units are respectively used for storing second-level output values related to input operation forms corresponding to second digits of different numerical values, the first-level output values and the second digits;
opening a plurality of N + 1-level storage units in the plurality of Nth-level storage units in sequence; the N + 1-level storage units are respectively used for storing the N + 1-level output values associated with the input operation forms corresponding to the N-th digit, the N-th-level output value and the N + 1-th digit of different numerical values; wherein N is a natural number.
Because a plurality of primary storage units are opened up in the storage space in the authentication server, the possible numerical value of the first digit and the operation result corresponding to the possible input operation form of the first digit are respectively stored in the primary storage units, the incidence relation among the first digit, the input operation form corresponding to the first digit in the preset operation rule and the operation result corresponding to the input operation form is established, and when the incidence relation among the first digit, the input operation form corresponding to the first digit in the preset operation rule and the operation result corresponding to the input operation form is established, the corresponding input result can be searched from the primary storage units through the specific numerical value of the first digit and the operation form of the first digit.
The possible operation result of the first digit is preserved in advance by the storage space, so that the process that the first digit needs to be calculated according to the input operation form before is omitted, the result can be obtained by direct search, and the efficiency of validation is improved.
Specifically, the step of sequentially finding out the output value of the input operation form corresponding to the digit of the digit from the storage space according to the arrangement sequence of the digits contained in the IMEI code of the terminal includes:
according to the first digit in the IMEI code and the input operation form thereof, searching a first-stage output value of the first digit in the corresponding input operation form from a first-stage storage unit;
searching a second-level output value of a second number in an operation form corresponding to input in the second-level storage unit opened in the first-level storage unit of the first output value from a plurality of second-level storage units opened in the first-level storage unit storing the first-level output value;
opening a plurality of three-level storage units in a second-level storage unit in which a second-level output value is stored, and searching a third-level output value corresponding to a third digit in an input operation form from the three-level storage units;
according to the method, the output value of the next digit in the corresponding input operation form is searched from the storage unit which searches the output value of the previous digit in the corresponding input operation form in sequence until the output value of the penultimate digit in the IMEI code of the terminal is obtained.
Such as: since the first digit may have any of 0-9 digits, the form of operation may have: in 6 cases, in order to implement that all possible operation results are stored in the primary storage unit respectively, 60 primary storage units need to be opened up in the storage space for storing 60 results obtained by 10 numbers under different operation forms respectively.
And for the verification of the second digit, under the condition that the first digit is known, searching an operation result corresponding to the operation form in the second-level storage unit opened by the first digit corresponding to the opened first-level storage unit.
In the specific embodiment, the same operation form is adopted for each number, or the same operation form is adopted for the same number, or the corresponding operation form is set according to the arrangement position of each number, so that the search amount of the output value in the storage unit can be greatly reduced, and the high efficiency of searching the output value is ensured. For example, the first digit of the obtained terminal IMEI code is 3, and the operation form of the corresponding input of the first digit is: and when the second digit and the operation result corresponding to the operation form are inquired from the second-level storage unit opened in the first-level storage unit which is associated with the first digit and has the operation mode of 3.
If the second digit is 7 and the corresponding operation form is addition operation, the operation result corresponding to the second digit is searched from the 60 secondary storage units.
By the searching method, the corresponding operation mode is sequentially searched for the digits of each IMEI code to obtain the result of the digit checking operation contained in all the IMEI codes except the last digit.
And step S3, checking the IMEI code according to the searched final output value, and if the check is successful, controlling the terminal to access the GSM network.
And calculating a validation value according to the output value, comparing the validation value with the last validation code, judging whether the validation values are the same or not, if so, judging that the IMEI code of the terminal is valid, and allowing the terminal to register and access the GSM network.
Further, in order to achieve accurate calculation and verification of the found output value, the method further includes:
sequentially finding out output values of each digit in the corresponding operation form from the storage space, and storing each output value in a cache space;
and acquiring an output value of the previous digit in the corresponding operation form from the cache space, and searching an output value of the next digit in the corresponding operation form according to the acquired output value of the previous digit in the corresponding operation form.
The cache space is used for storing the output values searched from the storage units at all levels, so that data loss of the output values during query is avoided.
In order to implement the steps of the invention to be started only when a GSM network access is performed, the method further comprises:
when the terminal is started or exits from a flight mode, detecting and sequencing frequency band networks which can be accessed by the terminal and signal intensity corresponding to the frequency band networks;
when the signal intensity arrangement of the GSM network is first, or when the fact that the terminal is only accessed to the GSM network is monitored, the IMEI code carried in the request information of the terminal for accessing the GSM network is obtained.
The method of the present invention is further described in more detail below by taking a mobile terminal as an example in the specific application embodiment of the present invention.
Detecting that the mobile terminal is switched from the flight mode to the exit flight mode, and starting to search networks one by one for network parking; when other network registration fails or a GSM network is directly registered, the IMEI code of the mobile terminal and the corresponding check code are acquired, but the next flow is started when the mobile terminal does not wait for all the contents to be acquired, and the following flow is executed when each digit of the IMEI code is acquired, and the original next flow is saved:
if the check operation in the GSM network registration has N operation forms, the following steps are executed:
g1, opening up N memory cells in the memory, each memory cell storing therein an output value in various possible operation forms associated with a first digit: 1,2,3,4,5,6,7,8,9,0, wherein the N storage units store operation results corresponding to different operation forms corresponding to each input number, and the storage unit developed in the step is a first-level storage unit;
g2, opening up N more memory cells in each memory cell opened up in G1, these N2The storage units store operation results of the corresponding input two-time operation form, and the storage unit developed in the step is a second-level storage unit;
g3, each memory sheet opened in G2Opening up N memory cells in the cell, N3The storage units store operation results of three corresponding operation modes, and the storage unit developed in the step is a third-level storage unit;
……
GK. Opening up N memory cells in each memory cell opened up in GK-1, where N isKThe storage units store operation results of corresponding input K operation forms, and the storage unit developed in the step is an Nth-level storage unit.
The steps of obtaining the operation result from the storage units are as follows:
h1, acquiring a first digit, inquiring an output value corresponding to the first digit and the first operation form in a first-level storage unit when detecting that the first operation form is input, and transmitting a corresponding operation result to a cache space for storage if the output value is inquired;
h2, acquiring a second digit, inquiring an output value of a second operation form corresponding to the second digit and the second digit in a second-level storage unit in the storage unit inquired by H1 when the input of the second operation form is detected, and transmitting a corresponding operation result to a cache space for storage if the inquiry is received;
h3, acquiring a third digit, inquiring a third operation form corresponding to the third digit and the third digit in a third-level storage unit in the storage unit inquired by H2 when the input of the third operation form is detected, and transmitting a corresponding operation result to a cache space for storage if the inquiry is received;
……
HK. Acquiring a Kth digit, inquiring a third operation form corresponding to a third digit and the third digit in a Kth-level storage unit in the storage units inquired by HK-1 when the input of the Kth operation form is detected, and transmitting a corresponding operation result to a cache space for storage if the inquiry is received;
thus, based on the above steps, when the entire IMEI code is fully entered, its validation code has been generated.
In a specific application, the operation forms corresponding to the numbers included in the IMEI code are the same operation form, and meanwhile, the operation forms corresponding to the numbers included in the IMEI code and the sequence thereof may be set to correspond, the operation forms corresponding to the numbers arranged in the even number order are the same operation form, and the operation forms corresponding to the numbers arranged in the odd number order are the same operation form.
If the operation form in the above steps is the same operation form as the operation form corresponding to each digit, the operation steps of each digit in the IMEI code are as follows:
g1, opening up N memory cells in the memory: the number of each memory cell is 1,2,3,4,5,6,7,8,9,0, and since the first input number is 1, the memory cell storing 1 is entered after searching
G2, opening up N more memory cells in each memory cell opened up in G1, these N2The storage units store operation results of two corresponding input operation forms, and the storage unit developed in the step is a second-level storage unit; for example, the following are opened up to a number of memory cells in the memory cell opened up in G1 and storing 1:
1+1=2, 1+2=3, 1+3=4, 1+4=5, … …, 1+9=10, 1+0= 1; wherein the form of operation is summation.
Since the input is 1, the memory cell with 1+1=2 is searched.
G3, opening up N more memory cells in each memory cell opened up in G2, these N3The storage units store operation results of three corresponding operation modes, and the storage unit developed in the step is a third-level storage unit;
for example, the following are opened up to a number of memory cells opened up in G2, which store 1+1= 2: 1+1+1= 3; 1+1+2= 4; 1+1+3= 5; 1+1+4= 6; … …, 1+1+9=11, 1+1+0= 2;
wherein the form of operation is summation.
Since 7 is input this time, the memory cell with 1+1+7=9 is searched.
G4, finishing the search.
If the operation form corresponding to each digit included in the IMEI code is set to correspond to the order in which the digit is located, the operation forms corresponding to the digits arranged in the even number are the same operation form, and the operation forms corresponding to the digits arranged in the odd number are the same operation form, the operation steps of each digit in the IMEI code are as follows:
(1) multiplying the even number by 2 respectively, and calculating the sum of the ones and tens numbers respectively
(2) Adding the odd digits and adding the value obtained in the previous step
(3) If the obtained several bits are 0, the check bit is 0, otherwise 10 minus the several bits
Such as: 35890180697241 even numbered bits multiplied by 2 to yield 5 x 2=10, 9 x 2=18, 1 x 2=02, 0 x 2=00, 9 x 2= 182 x 2=04, 1 x 2=02, and the sum of odd numbered bits and the sum of even numbered ones tens are calculated to yield:
3+ (1+0) +8+ (1+8) +0+ (0+2) +8+ (0+0) +6+ (1+8) +7+ (0+4) +4+ (0+2) =63 = > check bits 10-3 = 7
The MEID check code algorithm comprises the following steps:
(1) multiplying the even number by 2 respectively, and calculating the sum of the ones number and the tens number respectively, wherein the sum is a 16-system number
(2) Adding the odd digits and adding the value obtained in the previous step.
(3) If the bits obtained in step (2) are 0, the check bit is 0, otherwise 10 (where 10 is 16-ary) minus the single bit number
Such as: AF 0123450A BC DE even number bits multiplied by 2 yields F × 2=1E 1 × 2= 023 × 2= 065 × 2=0A A × 2= 14C × 2= 18E × 2=1C, and the sum of odd number digits and the sum of even number bits tens are calculated to yield a + (1+ E) +0+2+ 6+4+ a +0+ (1+4) + B + (1+8) + D + (1+ C) =64 = C.
The network rapid access method provided by the invention can quickly complete the verification of the registered IMEI code when the mobile terminal performs GSM network connection registration, thereby enabling the whole registration process to be quicker, improving the user experience and providing convenience for users.
Another embodiment provided by the present invention is a fast access system of a GSM network, as shown in fig. 2, including:
an identification code obtaining module 210, configured to obtain an IMEI code carried in request information when monitoring that a terminal accesses a GSM network request information; the function of which is as described in step S1.
A result searching module 220, configured to search, according to each number included in the IMEI code and an operation form corresponding to each preset number, an output value of each number in the corresponding operation form from a storage space, so as to obtain a final output value corresponding to the IMEI code; the function of which is as described in step S2.
The access control module 230 is configured to verify the IMEI code according to the found final output value, and if the IMEI code is verified successfully, perform access GSM network control on the terminal, where the function of the access control module is as described in step S3.
Another embodiment of the present invention is a server, as shown in fig. 3, including a memory 320 and a processor 310, where the memory 320 stores a computer program, and the processor 310 implements the steps of the method when executing the computer program.
Another embodiment provided by the invention is a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, carries out the steps of the method.
The invention provides a rapid access method of a GSM network and related equipment thereof, which are characterized in that request information of a terminal accessing the GSM network is monitored, and after the request information is obtained, output values of the number and an input operation form corresponding to the number are sequentially searched from a storage space according to the arrangement sequence of the IMEI code of the terminal containing the number; calculating the validation value of the terminal by utilizing an IMEI validation code algorithm according to each searched output value; and comparing the calculated validation value with the last check code of the IMEI code of the terminal, and if the validation value is equal to the last check code of the IMEI code of the terminal, controlling the terminal to access the GSM network. According to the method and the related equipment provided by the invention, the results of possible input operation modes of the IMEI code of the terminal are stored in the storage unit in advance, and after the IMEI code of the terminal needs to be acquired, the operation result is directly inquired from the storage unit according to the acquired operation mode of each digit on the IMEI code, so that the original operation process of each digit on the IMEI code is converted into the process of inquiring the operation result, the operation amount is reduced, the authentication efficiency of the IMEI code of the terminal is improved, the validation time is reduced, and convenience is provided for a user to use a terminal access network.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.

Claims (9)

1. A method for fast access to a GSM network, the method comprising the steps of:
A. when monitoring a request message for accessing a terminal to a GSM network, acquiring an IMEI code carried in the request message;
B. according to each digit contained in the IMEI code and the operation form corresponding to each preset digit, finding out the output value of each digit in the corresponding operation form from the storage space to obtain the final output value corresponding to the IMEI code;
C. checking the IMEI code according to the searched final output value, and if the checking is successful, performing access GSM network control on the terminal;
the step B comprises the following steps:
sequentially searching the operation form corresponding to the current digit, the output value of the previous digit and the output value associated with the current digit from the storage space until the output value of the penultimate digit of the IMEI code is searched; and the output value of the last-but-one digit of the IMEI code is the final output value.
2. The method of claim 1, wherein before step a, the method further comprises:
opening a plurality of first-level storage units in a storage space; the plurality of first-level storage units are respectively used for storing first-level output values related to first digit values of different numerical values and input operation forms corresponding to the first digit values;
opening up a plurality of secondary storage units in the plurality of primary storage units; the plurality of secondary storage units are respectively used for storing second-level output values related to input operation forms corresponding to second digits of different numerical values, the first-level output values and the second digits;
opening a plurality of N + 1-level storage units in the plurality of Nth-level storage units in sequence; the N + 1-level storage units are respectively used for storing the N + 1-level output values associated with the input operation forms corresponding to the N-th digit, the N-th-level output value and the N + 1-th digit of different numerical values; wherein N is a natural number.
3. The fast access method of GSM network of claim 2, wherein the operation form corresponding to each number contained in the IMEI code is the same operation form.
4. The fast access method of GSM network of claim 2, wherein the IMEI code comprises digits corresponding to the same operation type corresponding to the sequence thereof, digits in even number are in the same operation type, and digits in odd number are in the same operation type.
5. Method for fast access to a GSM network according to any of the claims 1-4, characterized in that the method further comprises:
sequentially finding out output values of each digit in the corresponding operation form from the storage space, and storing each output value in a cache space;
and acquiring an output value of the previous digit in the corresponding operation form from the cache space, and searching an output value of the next digit in the corresponding operation form according to the acquired output value of the previous digit in the corresponding operation form.
6. The fast access method for GSM network of claim 1, wherein the step a further comprises:
when the terminal is started or exits from a flight mode, detecting and sequencing signal intensities corresponding to each frequency band network and each frequency band network which can be accessed by the terminal;
when the signal intensity arrangement of the GSM network is first, or when the fact that the terminal is only accessed to the GSM network is monitored, the IMEI code carried in the request information of the terminal for accessing the GSM network is obtained.
7. A fast access system for a GSM network, comprising:
the terminal comprises an identification code acquisition module, a terminal access GSM network acquisition module and a GSM network access module, wherein the identification code acquisition module is used for acquiring an IMEI code carried in request information when the request information that the terminal accesses the GSM network is monitored;
the output searching module is used for searching output values of all the digits under the corresponding operation forms from the storage space according to all the digits contained in the IMEI code and the operation forms corresponding to the preset digits to obtain the final output values corresponding to the IMEI code; wherein, the operation form corresponding to the current digit, the output value of the previous digit and the output value associated with the current digit are searched in sequence from the storage space until the output value of the last digit of the IMEI code is searched; the output value of the last-but-one digit of the IMEI code is the final output value;
and the access control module is used for verifying the IMEI code according to the searched final output value, and if the IMEI code is successfully verified, the access control module is used for controlling the terminal to access the GSM network.
8. A server comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the method of any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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