CN101035372B - Fast matching method of AT instruction identifier - Google Patents
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- CN101035372B CN101035372B CN200710078237A CN200710078237A CN101035372B CN 101035372 B CN101035372 B CN 101035372B CN 200710078237 A CN200710078237 A CN 200710078237A CN 200710078237 A CN200710078237 A CN 200710078237A CN 101035372 B CN101035372 B CN 101035372B
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Abstract
The invention is a matching method in a 'children-brothers' mode, only arranging the known characters of AT instruction identifier in sequence into a tree structure, and in the matching course, as long as matching with some node, not matching for follow-up brother nodes of this node and children nodes of the brother nodes any more, largely reducing the matching comparison objects, effectively shortening searching time for matching and raising matching efficiency.
Description
Technical field
The present invention relates to terminal equipment in a kind of mobile communication system (abbreviating TE as) and terminal adapter (abbreviating TA as), perhaps the method for when using the AT instruction to communicate, the AT instruction identifier being mated fast between data terminal equipment (abbreviating DTE as) and the data circuit termination equipment (abbreviating DCE as).
Background technology
AT instruction is sent to DCE to TA or DTE by TE as a kind of information communication mode, and the operation by AT commands for controlling portable terminal (abbreviating MT as), realizes and the service interaction of GSM/UMTS network.The user can be by AT instruction the carrying out operation or the control of aspects such as function setting, calling, note, phone directory, data service, fax.
The AT instruction that sends when at present, TE communicates by letter with TA is with the byte-by-byte transmission of form of character stream.Therefore, TA must be at first assembles the character stream of the AT instruction that receives, and then, is which kind of operational order by what resolve that the AT instruction identifier acknowledges receipt of, comprehensively after the type and parameter of this AT instruction, could initiate corresponding operation requests to MT.So-called AT instruction identifier is that (length is that 3 or 3 are more than the character by preceding several characters of AT instruction or complete AT instruction, but generally can not surpass 10 characters) form, it can uniquely show certain operation, is combined by different letter and numbers usually.
The method of prior art matching instruction identifier is that the identifier with all AT instruction of current support is preset in the buffering area, when receiving AT instruction character stream, begin with character string mode relatively (as realizing from first byte with the C language, can use the character string comparison command in the java standard library) it is compared one by one with the AT instruction identifier that prestores in the buffering area, after searching out identical AT instruction identifier, confirm that instruction identifier is complementary.Prior art needs one by one the AT instruction identifier that is preset in the buffer area to be compared, up to the instruction identifier that searches out coupling.Obviously, the maximum times that the prior art matching process compares is the sum that is preset at the instruction identifier in the buffer area, under the more situation of AT number of instructions, will be comparatively consuming time, and efficient is lower, has prolonged the response time.
Summary of the invention
For overcoming the lower deficiency of prior art coupling AT instruction identifier efficient, the present invention proposes a kind of fast matching method of AT instruction identifier, can effectively shorten the match time of AT instruction identifier, raises the efficiency, and shortens the response time.
Matching process of the present invention is divided into general format and special format two classes with the AT instruction identifier of being supported, adopt tree that the character row of the AT instruction identifier of general format is become an ordered tree, each character in the AT instruction identifier is arranged on the node of different levels of tree according to the order of sequence, node is represented a character in the AT instruction identifier, mate one by one by pointer that points to tree node character respectively and the pointer that points to the AT instruction identifier character that receives character, until matching identical AT instruction identifier the AT instruction identifier.
Matching process of the present invention will not be the AT instruction identifier that begins with " AT " character, though perhaps begin with " AT " character, but the AT instruction identifier that is contained in (or having comprised another AT instruction identifier) in another AT instruction identifier fully is defined as the special format identifier, otherwise, be defined as the general format identifier.
The ground floor node character of the tree of matching process AT instruction identifier character of the present invention is for " A " and have only a node, second layer node character is for " T " and have only a node, three-layered node point is arranged according to the lexicographic order of the 3rd character of general format AT instruction identifier, the 4th layer of node arranged and come with the three-layered node point that is under the jurisdiction of an AT instruction identifier down according to the lexicographic order of the 4th character of general format AT instruction identifier, if the 4th layer of node do not exist, then this branch of tree finishes, the rest may be inferred, up to " ordered tree " that form an AT instruction identifier character.
Because the AT instruction identifier of general format is known before " tree " arranged, therefore, when arranging, only the character of all AT instruction identifiers of being supported is arranged tree.For example: in the AT instruction identifier, have " AT﹠amp; W ", 4 identifiers such as " AT+CSQ ", " AT+CBC ", " ATA ", only “ ﹠amp can appear then on three-layered node point; ", "+" and 3 characters such as " A ", therefore, just on three-layered node point, only arrange above-mentioned 3 characters.In like manner, on the 4th layer of node, only arrange " W " and " C " 2 characters, and character " W " only is arranged in three-layered node point “ ﹠amp; " below, character " C " be arranged in three-layered node point "+" below, below the promptly so-called node that belongs to same AT instruction identifier.Do not have the 4th layer of node below the character " A ", this branch finishes.The rest may be inferred, arranges " S " and " B " 2 characters on the layer 5 node, they all come the 4th layer of node " C " below.Arranged " Q " and " C " 2 characters on the layer 6 node, wherein character " Q " come layer 5 node " S " below, character " C " come layer 5 node " B " below.So promptly constituted an AT instruction ordered tree.
The digital value (abbreviating ID as) of storage AT instruction identifier in last one deck node of each branch of matching process tree of the present invention is confirmed this identifier and is returned ID when inquiring last one deck node of this identifier, to confirm this AT instruction.
The tree of matching process AT instruction identifier character of the present invention can be regarded as what is called " child one brother's " chained list description scheme, and the descriptor that comprises in each node has: node character, child's node, sibling.Wherein the node character is meant the some characters in the AT instruction identifier.Child's node is to be under the jurisdiction of an AT instruction identifier together with this node, but is in the node of following one deck of tree.Descending one deck node according to first nearest character node of character sortord, i.e. first child's node of current node.Sibling is meant with this node and is not under the jurisdiction of an AT instruction identifier, still belongs to the node of same one deck of tree.In with one deck node according to character sortord the character late node of close this node, i.e. " right side " sibling of current node.
Matching process of the present invention is when carrying out AT instruction identifier coupling, judge that at first the AT instruction identifier that receives is general format or special format, if special format then adopts prior art to mate, if general format then adopts following method to mate, comprise: pointer A points to the root node of the character tree of AT instruction identifier in the buffer area, pointer B points to the initial character of the AT command identification that receives, if the content that pointer B points to is empty, then it fails to match, finishes to search; Otherwise, judge whether the content of pointer A, B sensing is identical; If the content that pointer A, B point to is inequality, judge further then whether the sibling of the current node that pointer A points to is empty, be that then it fails to match, finish to search; Otherwise the sibling of the current node that pointer A is pointed to, again with the content of pointer B compare whether identical, up to this layer of tree node is intacter; If the content that pointer A, B point to is identical, whether child's node of judging earlier the current node that pointer A points to is empty, if not empty, then pointer B is pointed to next compare string, pointer A points to child's node of current node, repeats this process, otherwise, then explanation matches corresponding AT instruction, and coupling finishes.
AT instruction identifier for special format, (be generally single character ‘ r ' as the command for stopping identifier, be carriage return character), repetitive instruction identifier (being generally single character '/'), identifier ' AT+CR ' and ' AT+CRC ', adopt matching process of the present invention can not correctly return matching result.Because the instruction identifier number of special format is less, when receiving the AT identifier, can judge earlier that the method that re-uses the character string comparison is mated.
Matching process of the present invention adopts " child-brother " mode, only the character to known AT instruction identifier is arranged in tree according to the order of sequence, and in matching process, as long as match a certain node, just no longer the follow-up sibling of this node and child's node of sibling are mated, significantly reduce the contrast object of coupling, shortened the match search time effectively, improved the coupling operating efficiency.
Description of drawings
Fig. 1: prior art AT instruction identifier coupling FB(flow block);
Fig. 2: matching process AT instruction identifier character tree of the present invention (part) schematic diagram;
Fig. 3: the AT instruction identifier coupling FB(flow block) of matching process embodiment of the present invention.
Embodiment
Fig. 1 is a prior art AT instruction identifier coupling FB(flow block).Concrete enforcement is that all the AT instruction identifiers that will be supported are formulated for table according to the order of sequence, is stored in the preset buffer.When receiving the character stream of AT instruction identifier, first identifier from table begins coupling, if the AT instruction identifier of receiving is identical with current identifier, has then matched corresponding AT instruction, exports the ID of this AT instruction.If it is inequality, and the current AT instruction identifier that is compared is not in the table last, then next AT instruction identifier in the AT instruction identifier that receives and the table is compared, the rest may be inferred, last AT instruction identifier in table, as still inequality, then search end, return mistake.Hence one can see that, and required comparison maximum times of AT instruction identifier of prior art coupling is the sum of AT instruction identifier in the preset buffer.
Fig. 2 is matching process AT instruction identifier character tree of the present invention (part) schematic diagram.As seen from the figure, in the tree only the AT instruction identifier to known general format arrange, and only to arranging with the child's node that is under the jurisdiction of an AT instruction identifier.And, according in the AT instruction with the overwhelming majority that accounts for of " AT " character beginning, therefore, first and second layer is arranged as A and T respectively, object search and time when having reduced coupling again to a great extent.Among the figure, child's node of the node " C " in the 4th layer of node does not all draw, and has only listed preceding four child's nodes among the figure.
Fig. 3 is a matching process embodiment A T instruction identifier coupling FB(flow block) of the present invention.
In the present embodiment, defined the node of describing the AT ordered tree as the listed structure type of following table AtCommandTreeNode, concrete information about firms is as follows:
| Member's name | Data type | Describe |
| charVal | unsigned char | The character value of node |
| *firstChild | Point to the pointer of AtCommandTreeNode structure type | First child's node of node |
| *nextSibling | Point to the pointer of AtCommandTreeNode structure type | The next brother node of node |
| atCmdId | unsigned int | The digital value of instruction identifier |
Wherein, the character content of charVal storage present tree node; FirstChild and nextSibling are the structure pointers of AtCommandTreeNode type, and firstChild points to first child's node of this node; Pointer nextSibling points to this node " right side " sibling.Increased the digital value ID of member atCmdId storage AT instruction identifier during enforcement in node, different AT instruction identifiers has different digital values to describe, and it and AT instruction identifier are for concerning one to one.AtCmdId is only just meaningful at " last one deck " node (promptly storing the node of last character of AT instruction identifier) of tree, and for all the other nodes, the atCmdId value is invalid.Hence one can see that, can know the digital value ID of the current AT instruction identifier of receiving when having access to " last one deck " node of tree, promptly is which AT instruction identifier.The firstChild pointer of " last one deck " node is a null pointer.
For the AT instruction of general format, the coupling step is as follows:
Step 1, at first define two pointers, one is the pointer A of AtCommandTreeNode type, points to the root node of AT instruction ordered tree, and another be the pointer B of unsigned char type, the bebinning character of the AT instruction identifier that sensing TA receives;
Step 2, judge that whether the content of the current sensing of pointer B is empty,, search end if then it fails to match for sky; Otherwise continue execution in step 3;
Step 3,, judge whether the character content of the node that pointer A points to is identical with the character content that pointer B points to, if identical then execution in step 4; Otherwise execution in step 5;
Step 4, judge whether the firstChild in the structure that pointer A points to is empty, if sky has then matched corresponding AT instruction, the ID of this AT instruction identifier is the value of the atCmdId member in the node of current pointer A sensing, returns this member's value, and coupling finishes; Then pointer B points to character late, and pointer A points to the firstChild node of current node, repeating step 2;
Whether the sibling that step 5, pointer A point to current node is empty, is that then it fails to match, searches end, otherwise continues execution in step 6
Step 6, pointer A point to the sibling of current node, and the sensing of pointer B remains unchanged, repeating step 3.
The inventive method also can have other various embodiments; without departing from the spirit and substance of the case in the method for the present invention; those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to claim protection range of the present invention.
Claims (2)
1. an AT instruction identifier matching process is characterized in that: the AT instruction identifier of being supported is divided into general format identifier and special format identifier two classes; Adopt prior art that the special format identifier is mated, adopt tree that the character row of general format AT instruction identifier is become an ordered tree, mate one by one by pointer that points to tree node character respectively and the pointer that points to the AT instruction identifier character that receives character, until matching identical AT instruction identifier the AT instruction identifier; Wherein:
Described special format identifier is meant and is not the AT instruction identifier that begins with " AT " character, though perhaps begin but be contained in fully in another AT instruction identifier, though perhaps begun to comprise the AT instruction identifier of another AT instruction identifier with " AT " character with " AT " character; Described general format identifier is meant other AT instruction identifiers except that the special format identifier;
Described employing tree becomes an ordered tree with the character row of general format AT instruction identifier, comprise: the ground floor node character of the tree of AT instruction identifier character is for " A " and have only a node, second layer node character is for " T " and have only a node, three-layered node point is arranged according to the lexicographic order of the 3rd character of general format AT instruction identifier, the 4th layer of node arranged and come with the three-layered node point that is under the jurisdiction of an AT instruction identifier down according to the lexicographic order of the 4th character of general format AT instruction identifier, if the 4th layer of node do not exist, then this branch of tree finishes, the rest may be inferred, up to " ordered tree " that form an AT instruction identifier character;
Described pointer and the pointer that points to the AT instruction identifier character that receives by pointing to tree node character respectively mates one by one to the character of AT instruction identifier, until matching identical AT instruction identifier, comprising:
When carrying out AT instruction identifier coupling, judge that at first the AT instruction identifier that receives is general format or special format, if special format then adopts prior art to mate, if general format then adopts following method to mate:
Step 1, two pointers of definition, one is the pointer A of AtCommandTreeNode type, point to the root node of AT instruction identifier ordered tree, another is the pointer B of unsigned char type, the bebinning character of the AT instruction identifier that sensing terminal adapter TA receives carries out the comparison of the character content of the character content of pointer B sensing and the node that pointer A points to then;
The character content of the node that the character of step 2, the current sensing of pointer B and pointer A point to, promptly whether the charVal value is identical, if identical then execution in step 3, otherwise execution in step 4;
Step 3, if the firstChild in the structure that pointer A points to be empty, then pointer B points to character late, first child's node of pointer A sensing current node, if the content of the current sensing of pointer B is not empty, then repeating step 2, otherwise it fails to match, search end;
If the firstChild in the structure that pointer A points to is empty, then matched corresponding AT instruction, the ID of this AT instruction identifier is the value of the atCmdId member in the node of current pointer A sensing, returns this member's value, coupling finishes;
Step 4, if the nextSibling in the structure that pointer A points to be empty, " right side " sibling of pointer A sensing current node then, the sensing of pointer B remains unchanged, repeating step 2;
The implication of described AtCommandTreeNode type and atCmdId member's value is as shown in the table:
Wherein, the character content of charVal storage present tree node; FirstChild and nextSibling are the structure pointers of AtCommandTreeNode type, and firstChild points to first child's node of this node; Pointer nextSibling points to this node " right side " sibling; The digital value ID of member atCmdId storage AT instruction identifier, different AT instruction identifiers has different digital values to describe, it and AT instruction identifier are for concerning one to one, " last one deck " node that atCmdId is only setting, promptly store the node of last character of AT instruction identifier, just meaningful, for all the other nodes, the atCmdId value is invalid.
2. according to the described matching process of claim 1, it is characterized in that: the digital value ID of storage AT instruction identifier in last one deck node of each branch of tree, when inquiring last one deck node of this identifier, confirm this identifier and return ID, to confirm this AT instruction.
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| CN200710078237A CN101035372B (en) | 2007-02-15 | 2007-02-15 | Fast matching method of AT instruction identifier |
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| CN200710078237A CN101035372B (en) | 2007-02-15 | 2007-02-15 | Fast matching method of AT instruction identifier |
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| CN105447056A (en) * | 2014-09-28 | 2016-03-30 | 重庆重邮信科通信技术有限公司 | Method for searching attention (AT) instruction identifiers, and communication devices |
| CN105550215B (en) * | 2015-12-03 | 2019-02-01 | 深圳市欧克勒亚科技有限公司 | A kind of storage and the method for quickly retrieving of vehicle diagnosis condition randomness and relevance |
| CN110049003A (en) * | 2019-03-01 | 2019-07-23 | 上海数创医疗科技有限公司 | The method and device that AT instruction is divided by frame |
| CN112818087B (en) * | 2021-02-04 | 2024-05-28 | 北京数衍科技有限公司 | Printer instruction head-tail analysis method and device, equipment and storage medium |
| CN117319508B (en) * | 2022-06-22 | 2025-02-14 | 中移物联网有限公司 | A communication module AT command set compatibility evaluation method, device and equipment |
Citations (1)
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|---|---|---|---|---|
| CN1586085A (en) * | 2001-11-16 | 2005-02-23 | 阿尔卡特公司 | Method for enabling an application recorded in a radiocommunication terminal to access functions of the terminal and terminal implementing said method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586085A (en) * | 2001-11-16 | 2005-02-23 | 阿尔卡特公司 | Method for enabling an application recorded in a radiocommunication terminal to access functions of the terminal and terminal implementing said method |
Non-Patent Citations (4)
| Title |
|---|
| 3rd Generation Partnership Project,Technical SpecificationGroup Core Network and Terminals.3GPP TS 27.007 7.2.0.3GPP Organizational Partners＇ Publications Offices,2006,全文. |
| 3rd Generation Partnership Project,Technical SpecificationGroup Core Network and Terminals.3GPP TS 27.007 7.2.0.3GPP Organizational Partners＇ Publications Offices,2006,全文. * |
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