CN1874306A - Method and equipment of ageing treatment for header compressed list items of context in Internet protocol - Google Patents
Method and equipment of ageing treatment for header compressed list items of context in Internet protocol Download PDFInfo
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Abstract
The method comprises: a) the step of modifying usage id, searching the context list item of expanded compression and decompression matching the current message stream; said list item has a usage id indicating whether or not the context list item has been used; when said context list item is found, modifying the usage id into the one indicating the context list item of compression and decompression has been used; b) the step of timely polling, timely making polling for checking the context list item, when the usage id is checked to indicate an unused state, releasing said context list item of compression and decompression.
Description
Technical field
The present invention relates to the message storage processing method, header compressed list items of context ageing method and the device of especially a kind of Internet Protocol (InternetProtocols is called for short IP).
Background technology
In the TCP/IP technology in order to lower the redundancy of message flow in the point-to-point link, adopted the header compressed technology of a kind of IP, it is IPHC (IP Header Compression) technology, this technology is based on that following principle realizes: in the same message flow (message flow during for example Socket connects), most of field of forming heading all remains constant, for example: the source, destination address, the source, destination slogan etc., these fields that remain unchanged are called as the compressed and decompressed context of this message flow, if set up the compressed and decompressed context of message flow correspondence at the two ends of point-to-point link, so in the subsequent packet that ensuing compression side sends, only need carry the field that changes in the heading, and do not need complete heading, decompression side also can separate the original stem of this subsequent packet of extrusion according to compressed and decompressed context and the field that changes like this, thereby reduced the redundancy of message flow, reduced network consumption.
Between compression side and decompression side, may there be a plurality of message flows simultaneously, therefore need with Context identifier (Context Identifier, be called for short CID) distinguish the context of different message flows, each context must distribute a unique CID sign, if message flow is transmission control protocol (Transmission Control Protocol, be called for short TCP) message flow, then only need the CID sign just enough, if but message flow is non-TCP message flow, User Datagram Protoco (UDP) (UserDatagram Protocol for example, be called for short UDP) message flow,, then also need when context changes, use Generation to identify and distinguish contextual different editions.
Because each context will distribute a unique CID sign, so the compression linking number of IPHC technical support is that CID adopts two kinds of form: 8bit and 16bit (if the TCP message has only 8bit form) usually by how many decisions of CID.Therefore the value of CID has the upper limit, and for the UDP message, maximum is 65535 (2
16-1), for the TCP message, maximum has only 255 (2
8-1), and the maximum of CID consult to be determined by both link ends.The maximum of supposing both link ends consult to decide CID is 15, be that IPHC supports 16 compressions to connect, when the message flow sum that produces when both link ends reaches 16 so, both link ends will be set up 16 list items of context corresponding with message flow, and each list item all has unique CID sign.
But these list items of context need carry out burin-in process, and the definition of burin-in process is that the connection of working as certain list items of context correspondence no longer includes message transmissions, and its context can be eliminated so, and contextual CID also can be released; If list items of context is not carried out burin-in process, along with new message flow constantly appears in both link ends, will exhaust limited CID so, finally can make the message flow of new generation can't carry out header compressed processing.For example, if it is 15 that both link ends has been arranged maximum CID value, promptly the maximum compression linking number of Zhi Chiing is 16, suppose existing at the beginning 16 connections that meet reduced rule, message flow in these 16 connections can obtain correct compression and handle, if at this moment there is new connection to produce, because connecting 16 contexts that produce, 16 of fronts can not be released, even message been has no longer has been received and dispatched in 16 so original connections, message in the newly-built connection still can not be compressed yet, and causes the inefficiency of IPHC.
Summary of the invention
The objective of the invention is the inefficiency that causes at list items of context not being done burin-in process in the existing IPHC technology, a kind of Internet Protocol header compressed list items of context ageing method and device have been proposed, the shared compressed and decompressed resource of message flow of inefficacy is discharged, for new message flow provides compressed and decompressed processing, improved the utilization rate of IPHC.
For achieving the above object, the invention provides the header compressed list items of context ageing method of a kind of Internet Protocol, comprise and revise the step of using sign:
Search the compressed and decompressed context list item of the expansion that is complementary with current message stream, this list item has the use sign that is used to represent whether described compressed and decompressed context list item is being used;
When determining to find, revise described use and be designated the implication that the described compressed and decompressed context list item of expression is being used; And
The step of automatic regular polling:
Compressed and decompressed context list item to described expansion carries out automatic regular polling, when being checked through the expression of described use sign and not using, discharges described compressed and decompressed context list item.
In technique scheme, search before the compressed and decompressed context list item of the expansion that is complementary with current message stream, when judging that described current message stream is new message flow, set up the compressed and decompressed context list item of expansion for this current message flow, use sign in the compressed and decompressed context list item of the described expansion of initialization.In the step of described automatic regular polling, when being checked through the expression of described use sign and using, revise described use and be not designated and use.
Discharge described use sign in the step of described automatic regular polling and can adopt dual mode, be specially respectively: discharge the resource that described compressed and decompressed context list item takies; Perhaps revise described use and be designated discarded sign, should be used to represent that described compressed and decompressed context list item went out of use by discarded sign, discharge the context identifier that this compressed and decompressed context list item takies then, and stop described compressed and decompressed context list item is carried out automatic regular polling.
Wherein first kind of delivery mode is applicable to the situation that system resource is less, after the resource that the described compressed and decompressed context list item of described release takies, dynamically applies for resource when setting up the compressed and decompressed context list item once more.And second kind of delivery mode is applicable to the system effectiveness condition with higher, the context identifier that takies at this compressed and decompressed context list item of described release, and after stopping described compressed and decompressed context list item carried out automatic regular polling, when setting up the compressed and decompressed context list item once more, upgrade the content of described compressed and decompressed context list item.
For achieving the above object, the invention provides the header compressed list items of context burin-in process device of a kind of Internet Protocol, comprising:
The list item recognition unit is used for current message stream is discerned, and sets up or renewal compressed and decompressed context list item according to the new and old situation of message flow, and described compressed and decompressed context list item is to have added the compressed and decompressed context list item that uses sign;
The list item memory cell is connected with described list item recognition unit, is used to store described compressed and decompressed context list item;
The list item poll units is connected with described list item memory cell, is used for checking described compressed and decompressed context list item with polling mode, and revises described compressed and decompressed context list item or discharge described compressed and decompressed context list item resource according to check result.
In technique scheme, described list item recognition unit comprises:
The recognin unit is used for current message stream is discerned, and judges whether described current message stream is new message flow;
The sign subelement is connected with described list item memory cell with described recognin unit, is used for setting up or renewal compressed and decompressed context list item according to the judged result of described recognin unit.
Wherein said list item poll units comprises:
The poll subelement is connected with described list item memory cell, is used for checking described compressed and decompressed context table with polling mode;
List item discharges subelement, is connected with described list item memory cell with described poll subelement, is used for revising described compressed and decompressed context list item or discharging described compressed and decompressed context list item resource according to the check result of described poll subelement.
Based on technique scheme, the present invention has the following advantages:
1, the present invention has set up burin-in process mechanism for the compressed and decompressed context list item, has remedied the deficiency that lacks burin-in process in the IPHC agreement.
2, the invention provides two kinds of method for releasing that are adapted to the shared resource of list items of context of different system environmentss, situation that can the treatment system resource is less or system effectiveness is had relatively high expectations.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 uses the schematic flow sheet of sign for the modification in the header compressed list items of context ageing method of Internet Protocol of the present invention.
Fig. 2 is the schematic flow sheet of the automatic regular polling in the header compressed list items of context ageing method of Internet Protocol of the present invention.
Fig. 3 is the basic structure schematic diagram of the header compressed list items of context burin-in process device of Internet Protocol of the present invention.
Fig. 4 is the detailed structure schematic diagram of the header compressed list items of context burin-in process device of Internet Protocol of the present invention.
Embodiment
The present invention is after compressed and decompressed context list item (abbreviation list items of context) is set up, utilize timer control to realize automatic regular polling, the sign position that inspection is added when the compressed and decompressed context list item is set up, this sign position is defined as using sign, its effect is whether this compressed and decompressed context list item of expression is used, if this compressed and decompressed context list item no longer is used, then is released, thereby has realized that the header compressed list items of context of IP is aging.Message flow involved in the present invention can be TCP message flow or UDP message flow, also can be the message flow of other kind.
As shown in Figure 1, use the schematic flow sheet that identifies, may further comprise the steps for the modification in the header compressed list items of context ageing method of IP of the present invention:
Step 101 judges whether current message stream is new message flow, is execution in step 102 then, otherwise execution in step 103;
Step 102, compression side or decompression side set up the compressed and decompressed context list item for this message flow, and the compressed and decompressed context list item is carried out initialization, and execution in step 104 then;
Step 103 is searched the compressed and decompressed context list item that is complementary with this message flow, then the sign of the use in the compressed and decompressed context list item made amendment, and execution in step 104;
Step 104 continues to carry out the message handling process.
In step 102, when setting up the compressed and decompressed context list item, can in the heading compressed and decompressed context list item of routine, add new flag bit (using sign), shown in table 1,2
Table 1: conventional heading compressed and decompressed context list item
| CID | Generation | The IP stem | TCP or UDP stem | …… |
Table 2: the compressed and decompressed context list item that adds new flag bit
| CID | Generation | Use sign | The IP stem | TCP or UDP stem | …… |
The definition of wherein using sign and following definition (in hitting, using, be used) are relevant, if found the list items of context that is complementary with it in the processing procedure of message being compressed or decompressing, then claim this list items of context " to be hit "; If certain list items of context " is hit " during automatic regular polling, then claim this list items of context to be " in the use "; If the list items of context of certain " in the use " " is not hit " during automatic regular polling, then claim this list items of context to be " not using ".
In step 102, add when using sign, can this use sign be set to " in the use " or " not using ", when execution in step 103, the list items of context with this message flow coupling can be searched by compression side or decompression side, after finding this list items of context, promptly " hit ", then revised to use being designated " in the use ".
Use the list items of context burin-in process that is set to of sign that foundation is provided, use the state of sign can be used for judging whether list items of context has been in the state that does not re-use, for the message flow list items of context that no longer has been used in the sort of processing procedure, can adopt the polling mode of introducing below to discharge, thereby save the shared system resource of message flow list item.
As shown in Figure 2, the schematic flow sheet for the automatic regular polling in the header compressed list items of context ageing method of IP of the present invention may further comprise the steps:
Whether step 202 judge uses sign to represent just in use, is execution in step 203 then, otherwise execution in step 204;
Automatic regular polling will be checked all list items of context of having set up, remove the list item that does not re-use, thereby can handle how new message flow, difference according to system environments, the mode that can adopt two kinds of list items of context to discharge: when system resource is more limited, the direct shared resource of free context list item, when need generate list items of context next time for new message flow, dynamic application system resource; In addition when system effectiveness being required than higher the time, just the sign of the use in the list items of context is revised as " discarding ", on behalf of this list items of context, it go out of use, discharge message flow sequence number CID then, but do not discharge the shared resource of list item, just stop use being designated the automatic regular polling of the list items of context of " discarding ", when later on be new message flow generation list items of context, directly upgrade the content in the list item, just can handle with higher efficient.The mode of these two kinds of releases is applicable to different system status, no matter is more limited or system effectiveness requires than condition with higher for system resource, and the resource that the present invention can both efficient release re-use is handled the space for new message flow provides.
The sign that is used is set for easy to understand in the present invention, and this sign is not limited to the sign that arrives used herein, other identification method, and for example numeral can reach close effect too.
For instance: in the Compress softwares compression process, when compression side or decompression side detect new message flow, can set up the compressed and decompressed context list item, this list items of context is different with common list items of context, its difference is wherein to have set up one to use sign, and this use sign can be used for representing whether this message flow is in the state that is used.Initialized the time, this uses sign not need to be set at specific value, but when the message flow that detects current use when compression side or decompression side is not new message flow, on behalf of this message flow context, just need this use of modification to be designated be in the state that is used, promptly when this message flow is in the state that is used, just revises this use and be designated expression message flow context and be in the state that is used.
List items of context with the sign used can be expressed the user mode of this message flow, and the user mode foundation of burin-in process just, in order to check the user mode of message flow, the present invention adopts the method for automatic regular polling, the list items of context to all message flows is regularly checked, be designated untapped state if check out the use in certain list items of context, then discharge the shared resource of this list items of context; If checked list items of context is in the state that is used, then will use sign to be revised as the state that is not used.When in a single day this message flow is used, this use sign can be changed into again and being used, if and this message flow was not used in the time regularly, this use sign still can remain and not be used, like this in the time of timer expiry, will check out the state that this uses sign, and discharge the shared resource of this message flow list items of context.
The invention also discloses the header compressed list items of context burin-in process device of IP, referring to Fig. 3, basic structure schematic diagram for the header compressed list items of context burin-in process device of Internet Protocol of the present invention, comprise: list item recognition unit 2, be used for current message stream 1 is discerned, set up or renewal compressed and decompressed context list item according to the new and old situation of message flow, the compressed and decompressed context list item is to have added the compressed and decompressed context list item that uses sign; List item memory cell 3 is connected with list item recognition unit 2, is used for store compressed decompression list items of context; List item poll units 4 is connected with list item memory cell 3, is used for checking the compressed and decompressed context list item with polling mode, and revises the compressed and decompressed context list item or discharge compressed and decompressed context list item resource according to check result.
The detailed structure of this burin-in process device is seen Fig. 4, is the detailed structure schematic diagram of the header compressed list items of context burin-in process device of Internet Protocol of the present invention.List item recognition unit 2 specifically comprises recognin unit 21 and sign subelement 22, and recognin unit 21 is used for current message stream is discerned, and judges whether current message stream 1 is new message flow; Sign subelement 22 is connected with described list item memory cell with the recognin unit, is used for setting up or renewal compressed and decompressed context list item according to the judged result of recognin unit.
List item poll units 4 comprises that specifically poll subelement 41 and list item discharge subelement 42, and wherein poll subelement 41 is connected with list item memory cell 3, is used for checking the compressed and decompressed context list item with polling mode; List item discharges subelement 42, is connected with list item memory cell 3 with poll subelement 41, is used for revising the compressed and decompressed context list item or discharging compressed and decompressed context list item resource according to the check result of poll subelement 41.
This list items of context burin-in process device can be discerned new message flow, if new message flow is just set up the compressed and decompressed context list item, and in list items of context, add and use sign, if set up the message flow of compressed and decompressed context list item, then can make amendment to use sign wherein, this modification is the preparation that resource discharges, the list item poll units can be checked list items of context with certain frequency, be designated untapped state if find the use in certain list items of context, then discharge resource, this has just stayed usage space for new message flow.
The mode that discharges resource has two kinds, and a kind of is the shared resource of direct free context list item, when need generate list items of context next time for new message flow, and dynamic application system resource; Another kind of use in the list items of context is identified is revised as " discarding ", on behalf of this list items of context, it go out of use, discharge message flow sequence number CID then, but do not discharge the shared resource of list item, just stop use being designated the automatic regular polling of the list items of context of " discarding ".Specifically can be with reference to the content of top method embodiment, these two kinds of method for releasing are applicable to different system status, no matter be more limited or system effectiveness requires to compare condition with higher for system resource, the resource that the present invention can both efficient release re-use is handled the space for new message flow provides.
The present invention has following beneficial effect:
1, the present invention has set up burin-in process mechanism for the compressed and decompressed context list item, has remedied the deficiency that lacks burin-in process in the IPHC agreement.
2, the invention provides two kinds of method for releasing that are adapted to the shared resource of list items of context of different system environmentss, situation that can the treatment system resource is less or system effectiveness is had relatively high expectations.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1, the header compressed list items of context ageing method of a kind of Internet Protocol, it comprises revises the step of using sign:
Search the compressed and decompressed context list item of the expansion that is complementary with current message stream, this list item has the use sign that is used to represent whether described compressed and decompressed context list item is being used;
When determining to find, revise described use be designated the expression described compressed and decompressed context list item be used; And
The step of automatic regular polling:
Described compressed and decompressed context list item is carried out automatic regular polling, when being checked through the expression of described use sign and not using, discharge described compressed and decompressed context list item.
2, method according to claim 1, the compressed and decompressed context list item of wherein searching the expansion that is complementary with current message stream also comprises step before:
When judging that described current message stream is new message flow, set up the compressed and decompressed context list item of expansion for this current message flow, use sign in the compressed and decompressed context list item of the described expansion of initialization.
3, method according to claim 1 in the step of wherein said automatic regular polling, when being checked through the expression of described use sign and using, is revised described use and is not designated and uses.
4, according to any described method in the claim 1 to 3, the described compressed and decompressed context list item of wherein said release is specially: discharge the resource that described compressed and decompressed context list item takies.
5, according to any described method in the claim 1 to 3, the described compressed and decompressed context list item of wherein said release is specially: revise described use and be designated discarded sign, should be used to represent that described compressed and decompressed context list item went out of use by discarded sign, discharge the context identifier that this compressed and decompressed context list item takies then, and stop described compressed and decompressed context list item is carried out automatic regular polling.
6, method according to claim 4 after the resource that the described compressed and decompressed context list item of wherein said release takies, is dynamically applied for resource when setting up the compressed and decompressed context list item once more.
7, method according to claim 5, the context identifier that this compressed and decompressed context list item of wherein said release takies, and after stopping described compressed and decompressed context list item carried out automatic regular polling, when setting up the compressed and decompressed context list item once more, upgrade the content of described compressed and decompressed context list item.
8, the header compressed list items of context burin-in process device of a kind of Internet Protocol comprises:
The list item recognition unit is used for current message stream is discerned, and sets up or renewal compressed and decompressed context list item according to the new and old situation of message flow, and described compressed and decompressed context list item is to have added the compressed and decompressed context list item that uses sign;
The list item memory cell is connected with described list item recognition unit, is used to store described compressed and decompressed context list item;
The list item poll units is connected with described list item memory cell, is used for checking described compressed and decompressed context list item with polling mode, and revises described compressed and decompressed context list item or discharge described compressed and decompressed context list item resource according to check result.
9, device according to claim 8, wherein said list item recognition unit comprises:
The recognin unit is used for current message stream is discerned, and judges whether described current message stream is new message flow;
The sign subelement is connected with described list item memory cell with described recognin unit, is used for setting up or renewal compressed and decompressed context list item according to the judged result of described recognin unit.
10, according to Claim 8 or 9 described devices, wherein said list item poll units comprises:
The poll subelement is connected with described list item memory cell, is used for checking described compressed and decompressed context list item with polling mode;
List item discharges subelement, is connected with described list item memory cell with described poll subelement, is used for revising described compressed and decompressed context list item or discharging described compressed and decompressed context list item resource according to the check result of described poll subelement.
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| CNB2006100650081A CN100433724C (en) | 2006-03-15 | 2006-03-15 | Method and equipment of ageing treatment for header compressed list items of context in Internet protocol |
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| CNB2006100650081A CN100433724C (en) | 2006-03-15 | 2006-03-15 | Method and equipment of ageing treatment for header compressed list items of context in Internet protocol |
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| CN100433724C CN100433724C (en) | 2008-11-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247353B (en) * | 2008-03-25 | 2010-08-25 | 杭州华三通信技术有限公司 | Stream aging method and network appliance |
| CN102098298A (en) * | 2010-12-29 | 2011-06-15 | 福建星网锐捷网络有限公司 | Method for preventing filtering resource from being exhausted and network access equipment |
| CN101594290B (en) * | 2008-05-26 | 2011-11-30 | 中兴通讯股份有限公司 | Processing method and device for compressing context identification by a robust head |
| CN115514644A (en) * | 2022-11-15 | 2022-12-23 | 阿里云计算有限公司 | Entry consistency checking method, electronic equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI111493B (en) * | 2000-09-22 | 2003-07-31 | Nokia Corp | Defining a Contextual Tag in Compression of Header Fields |
| EP1349285A1 (en) * | 2002-03-28 | 2003-10-01 | Matsushita Electric Industrial Co., Ltd. | Method for making efficient use of the bits allocated to the sequence number when transmitting compressed header data |
| EP1512267B1 (en) * | 2002-06-12 | 2006-03-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for Internet Protocol headers compression initialization |
| US20040120357A1 (en) * | 2002-12-23 | 2004-06-24 | Sami Kekki | On-demand header compression |
| CN100407692C (en) * | 2004-08-11 | 2008-07-30 | 华为技术有限公司 | System and method for realizing IP header compression |
-
2006
- 2006-03-15 CN CNB2006100650081A patent/CN100433724C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247353B (en) * | 2008-03-25 | 2010-08-25 | 杭州华三通信技术有限公司 | Stream aging method and network appliance |
| CN101594290B (en) * | 2008-05-26 | 2011-11-30 | 中兴通讯股份有限公司 | Processing method and device for compressing context identification by a robust head |
| CN102098298A (en) * | 2010-12-29 | 2011-06-15 | 福建星网锐捷网络有限公司 | Method for preventing filtering resource from being exhausted and network access equipment |
| CN115514644A (en) * | 2022-11-15 | 2022-12-23 | 阿里云计算有限公司 | Entry consistency checking method, electronic equipment and storage medium |
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| CN100433724C (en) | 2008-11-12 |
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Granted publication date: 20081112 Termination date: 20160315 |