CN104092613A - Rapid table lookup method based on fuzzy matching - Google Patents
Rapid table lookup method based on fuzzy matching Download PDFInfo
- Publication number
- CN104092613A CN104092613A CN201410335259.1A CN201410335259A CN104092613A CN 104092613 A CN104092613 A CN 104092613A CN 201410335259 A CN201410335259 A CN 201410335259A CN 104092613 A CN104092613 A CN 104092613A
- Authority
- CN
- China
- Prior art keywords
- address
- list item
- fuzzy matching
- addresses
- matching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a table lookup method, in particular to a rapid table lookup method based on fuzzy matching. According to the method, firstly, a head characteristic value and a tail characteristic value of each key field in a table item are determined, the fields of common parts of the head characteristic values and the tail characteristic values serve as basic addresses of table items of the fuzzy matching, fuzzy matching ranges serve as offset addresses, and the basic addresses and the offset addresses jointly form table item addresses for storing table item content. When table lookup operations are executed, the basic addresses of the table items are determined according to the matching ranges, message mapping addresses are calculated on the basis of the basic addresses, and it is showed that lookup succeeds if mapping addresses are in the range of the table item addresses. The rapid table lookup method based on the fuzzy matching can meet rapid table lookup needs of the fuzzy matching.
Description
Technical field
The present invention relates to a kind of look-up method, particularly a kind of quick look-up method based on fuzzy matching.
Background technology
In the network switching equipment, the forwarding of message, according to strategy execution respective operations all by the realization of tabling look-up.Concerning three layers of architecture for exchanging, existing look-up method is five-tuple Hash look-up table, concrete grammar is the five-tuple (SIP/DIP/PROTOCOL/SPORT/DPORT) that extracts IP message, does hash(Hash) computing, using the result of hash computing as the list item address of depositing forwarding strategy.This look-up table speed, can meet the requirement of surface speed forwarding, thereby uses in a large number in switching equipment.But the defect of this look-up table is to realize exact matching.The in the situation that of fuzzy matching, need to there is a kind of new matching algorithm to realize table lookup function at a high speed.
Summary of the invention
In order to solve the problem of prior art, the invention provides a kind of quick look-up method based on fuzzy matching, it can meet the fast zoom table demand of fuzzy matching.
The technical solution adopted in the present invention is as follows:
Based on a quick look-up method for fuzzy matching, comprise the following steps:
First characteristic value and the tail characteristic value of each critical field in A, first definite list item;
B, by the common ground field of head and the tail characteristic value as fuzzy matching list item base address, fuzzy matching scope is as offset address, base address and offset address form list item address jointly, deposit contents in table;
C, execution table lookup operation, determine list item base address according to matching range, calculates message mapping address on basis, base address, if mapping address is in list item address realm, illustrates and search successfully.
When the condition of tabling look-up is the scope between from A to B, using the common ground field of condition A and condition B as list item base address, the scope of the field that condition A and condition B there are differences is as list item offset address, and base address+offset address has characterized the physical address that contents in table is deposited.
When table lookup operation, according to the length range of difference field, the message receiving is carried out to data cutting, be divided into common trait section and critical field; By cutting after common trait section and the common trait section in list item compare, if identical, continue comparison keyword section, keyword to be matched and first feature keyword are subtracted each other, if result within the scope of matching length, list item hits.
The beneficial effect that technical scheme provided by the invention is brought is:
A kind of quick look-up method based on fuzzy matching of the present invention, it can meet the fast zoom table demand of fuzzy matching.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the fundamental diagram of a kind of quick look-up method based on fuzzy matching of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
A kind of quick look-up method based on fuzzy matching of the present invention, generally comprises following steps:
First characteristic value and the tail characteristic value of each critical field in A, first definite list item;
B, by the common ground field of head and the tail characteristic value as fuzzy matching list item base address, fuzzy matching scope is as offset address, base address and offset address form list item address jointly, deposit contents in table;
C, execution table lookup operation, determine list item base address according to matching range, calculates message mapping address on basis, base address, if mapping address is in list item address realm, illustrates and search successfully.
As shown in Figure 1, dotted line top is the matching condition leaving in fuzzy matching list item, issuing is message to be matched, receive after message to be matched, first according to matching length information, message is cut, be divided into common trait section and critical field, secondly the common trait section after cutting and the common trait section in list item are compared, if identical, continue comparison keyword section, keyword to be matched and first feature keyword are subtracted each other, if result within the scope of matching length, list item hits.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. the quick look-up method based on fuzzy matching, comprises the following steps:
First characteristic value and the tail characteristic value of each critical field in A, first definite list item;
B, by the common ground field of head and the tail characteristic value as fuzzy matching list item base address, fuzzy matching scope is as offset address, base address and offset address form list item address jointly, deposit contents in table;
C, execution table lookup operation, determine list item base address according to matching range, calculates message mapping address on basis, base address, if mapping address is in list item address realm, illustrates and search successfully.
2. a kind of quick look-up method based on fuzzy matching according to claim 1, it is characterized in that, when the condition of tabling look-up is the scope between from A to B, using the common ground field of condition A and condition B as list item base address, the scope of the field that condition A and condition B there are differences is as list item offset address, and base address+offset address has characterized the physical address that contents in table is deposited.
3. a kind of quick look-up method based on fuzzy matching according to claim 1, is characterized in that, when table lookup operation, according to the length range of difference field, the message receiving is carried out to data cutting, is divided into common trait section and critical field; By cutting after common trait section and the common trait section in list item compare, if identical, continue comparison keyword section, keyword to be matched and first feature keyword are subtracted each other, if result within the scope of matching length, list item hits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335259.1A CN104092613A (en) | 2014-07-15 | 2014-07-15 | Rapid table lookup method based on fuzzy matching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335259.1A CN104092613A (en) | 2014-07-15 | 2014-07-15 | Rapid table lookup method based on fuzzy matching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104092613A true CN104092613A (en) | 2014-10-08 |
Family
ID=51640295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410335259.1A Pending CN104092613A (en) | 2014-07-15 | 2014-07-15 | Rapid table lookup method based on fuzzy matching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104092613A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073556A (en) * | 2016-11-14 | 2018-05-25 | 英业达科技有限公司 | Word string discrimination method and machine learning method |
| CN113392039A (en) * | 2021-06-09 | 2021-09-14 | 新华三信息安全技术有限公司 | Data storage and search method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090006394A1 (en) * | 2007-06-29 | 2009-01-01 | Snapp Robert F | Systems and methods for validating an address |
| CN101556610A (en) * | 2009-05-04 | 2009-10-14 | 中兴通讯股份有限公司 | Table creating and searching method used by network processor |
| CN101719128A (en) * | 2009-12-31 | 2010-06-02 | 浙江工业大学 | Fuzzy matching-based Chinese geo-code determination method |
| CN102567741A (en) * | 2010-12-27 | 2012-07-11 | 汉王科技股份有限公司 | Form matching method and device |
| CN102831235A (en) * | 2012-09-03 | 2012-12-19 | 苏州雄立科技有限公司 | Range match and lookup method |
-
2014
- 2014-07-15 CN CN201410335259.1A patent/CN104092613A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090006394A1 (en) * | 2007-06-29 | 2009-01-01 | Snapp Robert F | Systems and methods for validating an address |
| CN101556610A (en) * | 2009-05-04 | 2009-10-14 | 中兴通讯股份有限公司 | Table creating and searching method used by network processor |
| CN101719128A (en) * | 2009-12-31 | 2010-06-02 | 浙江工业大学 | Fuzzy matching-based Chinese geo-code determination method |
| CN102567741A (en) * | 2010-12-27 | 2012-07-11 | 汉王科技股份有限公司 | Form matching method and device |
| CN102831235A (en) * | 2012-09-03 | 2012-12-19 | 苏州雄立科技有限公司 | Range match and lookup method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073556A (en) * | 2016-11-14 | 2018-05-25 | 英业达科技有限公司 | Word string discrimination method and machine learning method |
| CN113392039A (en) * | 2021-06-09 | 2021-09-14 | 新华三信息安全技术有限公司 | Data storage and search method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10742722B2 (en) | Server load balancing | |
| US20160277297A1 (en) | Sdn packet forwarding | |
| CN102377664B (en) | TCAM (ternary content addressable memory)-based range matching device and method | |
| US9219681B2 (en) | System and method for storing flow entries in hardware tables | |
| US10621080B2 (en) | Pipelined hash table with reduced collisions | |
| CN113519144B (en) | Exact match and Ternary Content Addressable Memory (TCAM) hybrid lookup for network devices | |
| JP2015517272A (en) | Chaining inline services using software-defined networking | |
| CN105429879B (en) | Flow entry querying method, equipment and system | |
| WO2015106729A1 (en) | A load balancing method, device, system and computer storage medium | |
| CN103746919A (en) | Method for quickly classifying network packets through combining multi-way decision tree and Hash tables | |
| US11133947B2 (en) | Multicast routing | |
| CN110061921B (en) | Cloud platform data packet distribution method and system | |
| CN104092613A (en) | Rapid table lookup method based on fuzzy matching | |
| CN107995116B (en) | Message sending method and communication equipment | |
| CN106716870A (en) | Local packet switching at a satellite device | |
| CN102289453B (en) | TCAM (ternary content addressable memory) rule storing method, device and network equipment | |
| CN105282133A (en) | A method of forming a Hash input from packet contents and an apparatus thereof | |
| CN103581020B (en) | The method of a kind of message forwarding, Apparatus and system | |
| CN103812774A (en) | TCAM based strategy configuration method, message processing method and corresponding device | |
| CN106850442B (en) | Message processing method and forwarding device | |
| CN106411553A (en) | Optimization method of service chain path and apparatus thereof | |
| CN103503386B (en) | The network equipment and processing message method | |
| CN104539537B (en) | A kind of method for searching route and device | |
| CN102316012A (en) | Method for realizing Internet protocol (IP) express forwarding and three-layer forwarding equipment | |
| US9853891B2 (en) | System and method for facilitating communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141008 |
|
| WD01 | Invention patent application deemed withdrawn after publication |