CN101197824A - Method and system for confirming compression algorithm - Google Patents
Method and system for confirming compression algorithm Download PDFInfo
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- CN101197824A CN101197824A CNA2006101668307A CN200610166830A CN101197824A CN 101197824 A CN101197824 A CN 101197824A CN A2006101668307 A CNA2006101668307 A CN A2006101668307A CN 200610166830 A CN200610166830 A CN 200610166830A CN 101197824 A CN101197824 A CN 101197824A
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Abstract
The invention discloses a method for determining a decompression algorithm and a system thereof, before the transmission of the compressed information to be exchanged by a communication end and a communication opposite end, the communication end send a request of a compression algorithm protocol to the communication opposite end which negotiates with the communication end to select out a compression algorithm supporting by both parts. The invention, as the two communication parts negotiate and select out a compression algorithm supported by both parts, in the following information exchange process, can compress/decompress information by the local supported compression algorithm thereof, thereby reducing decompression time as well as the time delay of information exchange.
Description
Technical field
The present invention relates to the compress technique in the wireless communication system, refer to a kind of method and system of definite compression algorithm especially.
Background technology
In the wireless communication system, when using the text based agreement to carry out information interaction, such as Session initiation Protocol (SIP, Session Initiated Protocol) real-time streaming protocol (RTSP, Real TimeStreaming Protocol) etc., because the text based protocol message is bigger, and the bandwidth of Radio Link is precious and limited, for time-delay that reduces information interaction and the bandwidth availability ratio that improves Radio Link, need to use signaling compression (SIGCOMP, Signaling Compression) mechanism on Radio Link, transmitting after the mutual Information Compression.Wherein, SIGCOMP is the signaling compress technique of ietf definition, is a kind of general framework at the compression of text based signaling protocol.
This paper is example with the IP Multimedia System (IMS) based on SIP, in order to reduce time-delay that session sets up and the bandwidth availability ratio that improves Radio Link, needs to use SIGCOMP that sip message compression back is transmitted on Radio Link.
At present, that SIGCOMP uses when decompress(ion) is working solution compressed virtual machine (UDVM, Universal Decompression Virtual Machine) mechanism, UDVM is a kind of virtual machine that is used to decompress that defines in the SIGCOMP framework, UDVM carries out the gunzip of writing with bytecode (Bytecode), and the signaling message after the compression is carried out the decompress(ion) reduction.Generally speaking, the speed of the UDVM decompress(ion) of use virtual technology is slower than normal decompress(ion) program.Wherein, Bytecode is the algorithm of decompress(ion), and the primitive operation computing that is defined by UDVM combines.
From the existing method of determining compression algorithm, because the algorithm of carrying out is made up of the fictitious order of SIGCOMP definition, therefore, before execution algorithm, need to resolve earlier instruction in UDVM, increase decompression time so inevitably, thereby increased the time delay of information interaction.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of definite compression algorithm, can shorten decompression time, reduces the time delay of information interaction.
Another object of the present invention is to provide a kind of system of definite compression algorithm, can shorten decompression time, reduce the time delay of information interaction.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of definite compression algorithm, before communication ends and Correspondent Node need compress the back transmission to mutual information, this method may further comprise the steps:
A. communication ends is initiated compression algorithm to Correspondent Node and is consulted request;
B. Correspondent Node and communication ends are held consultation, and select the compression algorithm that both sides all support.
A kind of system of definite compression algorithm, this system comprises: communication ends and Correspondent Node;
Communication ends is used for initiating compression algorithm to Correspondent Node and consults request;
Correspondent Node, the initiation compression algorithm that is used to receive from communication ends is consulted request, consults with communication ends, selects the compression algorithm that both sides all support.
As seen from the above technical solution, the present invention is before communication ends and Correspondent Node need compress the back transmission to mutual information, communication ends sends to Correspondent Node with the compression algorithm information of the compression algorithm that self supports, Correspondent Node is in the compression algorithm of self supporting, select the compression algorithm of the compression algorithm information that coupling receives, and the compression algorithm parameter of the compression algorithm selected is returned to communication ends.The present invention is the selected compression algorithm of supporting separately of communicating pair through consultation, follow-up needs carry out information compressed mutual in, directly utilize self the local compression algorithm compression/decompression information of supporting, reduced decompression time, thereby reduced the time delay of information interaction.
Description of drawings
Fig. 1 is the flow chart of the embodiment one of the inventive method;
Fig. 2 is the flow chart of the embodiment two of the inventive method;
Fig. 3 is the schematic diagram of the composition embodiment of system of the present invention.
Embodiment
Core concept of the present invention is: communication ends is initiated compression algorithm to Correspondent Node and is consulted request, and Correspondent Node and communication ends are consulted, and select the compression algorithm that both sides all support.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 1 is the flow chart of the embodiment one of the inventive method, as shown in Figure 1, before communication ends and Correspondent Node need compress the back transmission to mutual information, may further comprise the steps:
Step 100: the compression algorithm information of the compression algorithm that communication ends is supported self is carried at compression algorithm and consults request and send to Correspondent Node.
In this step, compression algorithm information can comprise compression algorithm sign (ID) and compression parameters.
Wherein, compression algorithm ID is used to distinguish different compression algorithms.Such as: adopt the different compression algorithms of string representation such as LZSS, DEFLATE, LZW respectively.
At different compression algorithms, can corresponding different compression parameters.Such as, for compression algorithm ID is the compression algorithm of LZSS, compression parameters can comprise buffer size, deviant code length, length coding length etc., wherein, buffer size is a mandatory parameter, the default value of deviant code length is 12 bytes (bit), and the default value of length coding length is 4bit; For compression algorithm ID is the compression algorithm of DEFLATE, compression parameters can comprise buffer size, whether adopts static Huffman (Huffman) coding, wherein, buffer size is for must fill out content, and the default value that whether adopts static Huffman coding is for adopting static Huffman coding.Do not transmit if do not select to use static Huffman coding then need dynamic Huffman encoded radio is placed in the compressed message head.
Above-mentioned compression algorithm is existing, and the compression parameters of compression algorithm correspondence also is existing, and concrete the use belongs to technology as well known to those skilled in the art, repeats no more here.What the present invention emphasized is, communication ends can be that compression parameters sends to Correspondent Node with the compression algorithm of self supporting, so as Correspondent Node to compression algorithm determine hold consultation.
Further, compression algorithm information can also comprise the compression algorithm precedence information, is used to identify the priority-level of the compression algorithm that communication ends supports.Like this, Correspondent Node can mate the high compression algorithm of priority earlier according to the compression algorithm precedence information.Need to prove,, so, can precedence information be set separately and distinguish if communicating pair is made an appointment according to ascending order or the regularly arranged compression algorithm information of descending.
Further, compression algorithm information can also comprise the selection parameter, is used to identify corresponding compression algorithm supplier, such as, the corresponding designated identification of the compression algorithm that provides by communication ends is provided, the compression algorithm correspondence after being consulted by Correspondent Node is decided through consultation sign.
Step 101: Correspondent Node is selected the compression algorithm of the compression algorithm information that coupling receives in the compression algorithm that self supports, and the compression algorithm information of the compression algorithm selected is returned to communication ends.
Specific implementation comprises in this step: Correspondent Node from the compression algorithm that self supports, select with the compression algorithm information that receives in the consistent compression algorithm of compression algorithm ID; And the compression parameters of the compression algorithm correspondence of relatively selecting, whether consistent with in the compression algorithm information that receives with the corresponding compression parameters of this compression algorithm ID, if in full accord, determine that then the compression algorithm selected is the compression algorithm of the compression algorithm of coupling after promptly consulting; Otherwise, determine that then the compression algorithm of selecting is unmatched compression algorithm.
Correspondent Node returns to content that the compression algorithm information of communication ends specifically comprises referring to the description in the step 100, no longer repeats here.Correspondent Node can all return to communication ends with the compression algorithm information from communication ends, and corresponding each compression algorithm ID is provided with different selection parameters, and communication ends can be distinguished out compression algorithm after the negotiation according to the selection parameter like this; Correspondent Node also can only return to communication ends with the compression algorithm information that negotiates, and at this moment, can mark the selection parameter.
The inventive method further comprises: if Correspondent Node is in the compression algorithm of self supporting, can not select the compression algorithm of mating the compression algorithm information that receives, so, follow-up between communication ends and the Correspondent Node does not compress processing alternately, perhaps, adopt the method for existing definite compression algorithm to redefine compression algorithm between communication ends and the Correspondent Node, such as adopting SIGCOMP mechanism, follow-up information interaction adopts the compression algorithm that redefines to compress processing.
From method embodiment illustrated in fig. 1 as can be seen, communicating pair is selected the compression algorithm of all supporting separately through consultation, follow-up needs carry out information compressed mutual in, directly utilize self the local compression algorithm compression/decompression information of supporting, reduce decompression time, thereby reduced the time delay of information interaction.
Among the present invention, Correspondent Node and communication ends negotiation method are a lot, just one of them embodiment shown in Figure 1, and Fig. 2 is the flow chart of the embodiment two of the inventive method, as shown in Figure 2, may further comprise the steps:
Step 200: communication ends is just initiated compression algorithm to Correspondent Node and is consulted request.
Step 201: Correspondent Node returns to communication ends with the compression algorithm of self supporting after receiving that compression algorithm is consulted request, communication ends selects to mate the compression algorithm of the compression algorithm information that receives.
Here just illustrate Correspondent Node and communication ends negotiation method, and be not used in qualification application of the present invention.
With before the initiation SIP session in the IMS system, determine that compression algorithm is that example is described in detail the inventive method below.At this moment, communication ends is user terminal (UE), and Correspondent Node is the entrance Proxy Call Session Control Function (P-CSCF) of IMS system.Suppose that UE initiates the compression algorithm negotiations process by initial registration (Register) request, specific as follows:
UE is carried at the compression algorithm information of self supporting in the Initial R egister request, sends to P-CSCF.Suppose that compression algorithm information adopts the form storage of tabulation, form the compression algorithm tabulation, comprise compression algorithm ID, compression algorithm parameter and compression algorithm precedence information in the compression algorithm tabulation, such as compression algorithm according to the priority-level descending.
P-CSCF receives the Initial R egister request of carrying the compression algorithm tabulation, preserve this compression algorithm list information, and from Initial R egister request, continue the subsequent registration flow process again behind this compression algorithm list information of deletion, need to prove, the specific implementation of subsequent registration flow process and the present invention are irrelevant, here no longer describe in detail, can be referring to the relevant criterion agreement.
Simultaneously, P-CSCF is according to this compression algorithm list information, selects the compression algorithm of coupling from the compression algorithm of self supporting, and is stored in the compression algorithm tabulation after the negotiation.
P-CSCF receives should Initial R egister after the 401 unauthorizeds response of request, the compression algorithm tabulation after in response of 401 unauthorizeds or 200OK acknowledge message etc., carrying negotiation, and return to UE.Comprise algorithm ID, compression algorithm parameter and compression algorithm precedence information in the compression algorithm tabulation, tabulate according to the priority-level descending such as compression algorithm.
Like this, UE and P-CSCF can compress and decompression processing subsequent message by good through consultation algorithm.
Among the present invention,, can in Initial R egister request, expand a compression algorithm header field, be used to carry compression algorithm information in order in Initial R egister request, to carry compression algorithm information; Also compression algorithm information can be carried in the message body (body) of Initial R egister request, represent the compression algorithm tabulation as using the XML form.
Initiate to consult the compression algorithm by Initial R egister request except above-mentioned, also can when UE just begins access network, initiate to consult by the existing inquiry ability of SIP (OPTION) request; In addition, can also use other non-sip message to finish negotiation, just need in other non-sip message, carry indication information, be used to indicate the compression algorithm of negotiation to be used to compress follow-up SIP or RTSP message flow.
In addition, also can realize the definite of compression algorithm at communicating pair by self-defining message, the agreement of message support depends on communicating pair, so long as the agreement that communicating pair is all supported gets final product.
Fig. 3 is the schematic diagram of the composition embodiment of system of the present invention, comprises communication ends and Correspondent Node, and wherein, communication ends is used for initiating compression algorithm to Correspondent Node and consults request; Correspondent Node, the initiation compression algorithm that is used to receive from communication ends is consulted request, consults with communication ends, selects the compression algorithm that both sides all support.
Particularly, described communication ends, described communication ends comprises: the compression algorithm information that is used for the compression algorithm that will self support is carried at compression algorithm and consults the communication ends sending module that request sends to Correspondent Node; Be used to receive communication from the compression algorithm parameter of the compression algorithm of selecting of Correspondent Node to receiver module.Described Correspondent Node comprises: the Correspondent Node receiver module that is used to receive the request of consulting from the initiation compression algorithm of communication ends; Be used for compression algorithm, the Correspondent Node processing module of the compression algorithm of the compression algorithm information that the selection coupling receives in self support; The compression algorithm parameter that is used for the compression algorithm that will select returns to the Correspondent Node sending module of communication ends.
Perhaps, described Correspondent Node comprises: the Correspondent Node receiver module that is used to receive the request of consulting from the initiation compression algorithm of communication ends; The compression algorithm that is used for self supporting returns to the Correspondent Node sending module of communication ends; Described communication ends comprises: the communication ends receiver module that is used to receive the compression algorithm of supporting from Correspondent Node; Be used to select to mate the communication ends processing module of the compression algorithm of the compression algorithm information that receives.
Communication ends can be UE, and Correspondent Node can be P-CSCF.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for a definite compression algorithm is characterized in that, before communication ends and Correspondent Node need compress the back transmission to mutual information, this method may further comprise the steps:
A. communication ends is initiated compression algorithm to Correspondent Node and is consulted request;
B. Correspondent Node and communication ends are held consultation, and select the compression algorithm that both sides all support.
2. method according to claim 1 is characterized in that, described steps A specifically comprises: the compression algorithm information of the compression algorithm that communication ends is supported self is carried at compression algorithm and consults to send to Correspondent Node in the request;
Described step B specifically comprises: described Correspondent Node is selected the compression algorithm of the compression algorithm information that coupling receives in the compression algorithm that self supports, and the compression algorithm parameter of the compression algorithm selected is returned to communication ends.
3. method according to claim 1 is characterized in that, described step B specifically comprises: described Correspondent Node returns to communication ends with the compression algorithm of self supporting, communication ends selects to mate the compression algorithm of the compression algorithm information that receives.
4. according to claim 2 or 3 described methods, it is characterized in that described compression algorithm information comprises: be used to distinguish the compression algorithm sign ID of different compression algorithms, and the compression parameters of corresponding different compression algorithms.
5. method according to claim 4 is characterized in that, the method for selecting described in the step B is:
B1. from the compression algorithm that self supports, select with the compression algorithm information that receives in the consistent compression algorithm of compression algorithm ID;
If the compression parameters of the compression algorithm correspondence of B2. selecting, consistent with the corresponding compression parameters of this compression algorithm ID with in the compression algorithm information that receives then determined the compression algorithm the selected compression algorithm for coupling.
6. method according to claim 4 is characterized in that, described compression algorithm information also comprises: the compression algorithm precedence information that is used to identify the priority-level of compression algorithm.
7. according to claim 4 or 6 described methods, it is characterized in that described compression algorithm information also comprises: the selection parameter that is used to identify corresponding compression algorithm supplier.
8. method according to claim 7, it is characterized in that, if the compression parameters of the compression algorithm correspondence of selecting, inconsistent with the corresponding compression parameters of this compression algorithm ID with in the compression algorithm information that receives determines that then the compression algorithm of selecting is unmatched compression algorithm;
Described Correspondent Node further will be from communication ends, and the not selected compression algorithm information that goes out returns to communication ends, and corresponding each compression algorithm is provided with corresponding selection parameter.
9. method according to claim 1 is characterized in that, described communication ends is the user terminal UE among the IP Multimedia System IMS, and described Correspondent Node is Proxy Call Session Control Function P-CSCF;
The compression algorithm information that described communication ends sends to Correspondent Node is carried in the initial registration request message;
The compression algorithm information that described Correspondent Node returns is carried in the response message.
10. method according to claim 1 is characterized in that, the compression algorithm information that described communication ends sends to Correspondent Node is carried in inquiry ability OPTION request message or the self-defined request message; The compression algorithm information that described Correspondent Node returns is carried in response of OPTION request message or the self-defined response message;
Carry in the described self-defined message that to be used to indicate the compression algorithm of negotiation be the indication information that is used to compress follow-up SIP or RTSP message flow.
11., it is characterized in that described compression algorithm information is carried in the newly-increased compression algorithm header field of request message, perhaps is carried among the message body body of response message according to claim 9 or 10 described methods.
12. the system of a definite compression algorithm is characterized in that, this system comprises: communication ends and Correspondent Node;
Communication ends is used for initiating compression algorithm to Correspondent Node and consults request;
Correspondent Node, the initiation compression algorithm that is used to receive from communication ends is consulted request, consults with communication ends, selects the compression algorithm that both sides all support.
13. system according to claim 12 is characterized in that, described communication ends comprises:
Communication ends sending module, the compression algorithm information that is used for the compression algorithm that will self support are carried at compression algorithm and consult request and send to Correspondent Node;
The communication ends receiver module is used to receive the compression algorithm parameter from the compression algorithm of selecting of Correspondent Node;
Described Correspondent Node comprises:
The Correspondent Node receiver module, the initiation compression algorithm that is used to receive from communication ends is consulted request;
The Correspondent Node processing module is used for the compression algorithm in self support, selects to mate the compression algorithm of the compression algorithm information that receives;
The Correspondent Node sending module, the compression algorithm parameter that is used for the compression algorithm that will select returns to communication ends.
14. system according to claim 12 is characterized in that, described Correspondent Node comprises:
The Correspondent Node receiver module, the initiation compression algorithm that is used to receive from communication ends is consulted request;
The Correspondent Node sending module, the compression algorithm that is used for self supporting returns to communication ends;
Described communication ends comprises:
The communication ends receiver module is used to receive the compression algorithm of supporting from Correspondent Node;
The communication ends processing module is used to select to mate the compression algorithm of the compression algorithm information that receives.
15. system according to claim 12 is characterized in that, described communication ends is the UE in the IMS system, and described Correspondent Node is P-CSCF.
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| CNA2006101668307A CN101197824A (en) | 2006-12-08 | 2006-12-08 | Method and system for confirming compression algorithm |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010017749A1 (en) * | 2008-08-12 | 2010-02-18 | 华为技术有限公司 | Method and apparatus for negotiating data compression algorithm through cx or sh interface |
| CN101808049A (en) * | 2010-03-25 | 2010-08-18 | 盈世信息科技(北京)有限公司 | Mail transmission method and system |
| CN102413506A (en) * | 2010-09-20 | 2012-04-11 | 华为技术有限公司 | Compression method and device |
| CN103532984A (en) * | 2013-11-01 | 2014-01-22 | 中国联合网络通信集团有限公司 | Data transmission method, device and system of websocket protocol |
| CN105264503A (en) * | 2014-04-30 | 2016-01-20 | 华为技术有限公司 | Method, device, and system for interaction between hard disk drives |
| CN107077117A (en) * | 2014-10-29 | 2017-08-18 | 西门子公司 | The selection of automatic compression algorithm and parameter regulation based on Context Knowledge |
| CN107104813A (en) * | 2016-02-23 | 2017-08-29 | 华为技术有限公司 | A kind of information transferring method, gateway and controller |
| CN107306444A (en) * | 2016-04-25 | 2017-10-31 | 中兴通讯股份有限公司 | Send the method and device of data |
| CN110365690A (en) * | 2019-07-19 | 2019-10-22 | 迈普通信技术股份有限公司 | Flow collection method, apparatus and storage medium |
| CN112583829A (en) * | 2020-12-14 | 2021-03-30 | 上海英方软件股份有限公司 | Method and device for self-adaptive multi-level end-to-end transmission of market information stream |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010017749A1 (en) * | 2008-08-12 | 2010-02-18 | 华为技术有限公司 | Method and apparatus for negotiating data compression algorithm through cx or sh interface |
| CN101808049A (en) * | 2010-03-25 | 2010-08-18 | 盈世信息科技(北京)有限公司 | Mail transmission method and system |
| CN101808049B (en) * | 2010-03-25 | 2012-08-22 | 盈世信息科技(北京)有限公司 | Mail transmission method and system |
| CN102413506A (en) * | 2010-09-20 | 2012-04-11 | 华为技术有限公司 | Compression method and device |
| CN102413506B (en) * | 2010-09-20 | 2015-04-15 | 华为技术有限公司 | Compression method and device |
| CN103532984A (en) * | 2013-11-01 | 2014-01-22 | 中国联合网络通信集团有限公司 | Data transmission method, device and system of websocket protocol |
| CN103532984B (en) * | 2013-11-01 | 2017-02-08 | 中国联合网络通信集团有限公司 | Data transmission method, device and system of websocket protocol |
| CN105264503A (en) * | 2014-04-30 | 2016-01-20 | 华为技术有限公司 | Method, device, and system for interaction between hard disk drives |
| CN107077117A (en) * | 2014-10-29 | 2017-08-18 | 西门子公司 | The selection of automatic compression algorithm and parameter regulation based on Context Knowledge |
| US10303148B2 (en) | 2014-10-29 | 2019-05-28 | Siemens Aktiengesellschaft | Automatic compression algorithm selection and parameter tuning based on contextual knowledge |
| CN107077117B (en) * | 2014-10-29 | 2019-10-01 | 西门子公司 | The selection of automatic compression algorithm and parameter regulation based on Context Knowledge |
| CN107104813A (en) * | 2016-02-23 | 2017-08-29 | 华为技术有限公司 | A kind of information transferring method, gateway and controller |
| US10645184B2 (en) | 2016-02-23 | 2020-05-05 | Huawei Technologies Co., Ltd. | Information transmission method, gateway, and controller |
| CN107306444A (en) * | 2016-04-25 | 2017-10-31 | 中兴通讯股份有限公司 | Send the method and device of data |
| CN110365690A (en) * | 2019-07-19 | 2019-10-22 | 迈普通信技术股份有限公司 | Flow collection method, apparatus and storage medium |
| CN112583829A (en) * | 2020-12-14 | 2021-03-30 | 上海英方软件股份有限公司 | Method and device for self-adaptive multi-level end-to-end transmission of market information stream |
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