CN105979513B - A kind of decryption method and system of VoLTE network SGI interface - Google Patents
A kind of decryption method and system of VoLTE network SGI interface Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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Abstract
The present invention is suitable for the monitoring signaling field of communication network, provide the decryption method and decryption system of a kind of VoLTE network SGI interface, the decryption method can be parsed SGI interface by the data that IPSec-ESP transmission mode encrypts, it greatly facilitates operator and statistics network KPI index and checks the calling trace of user in monitoring network communication system, be conducive to the quick positioning of the network optimization and failure or problem.
Description
Technical field
The invention belongs to the monitoring signaling field of communication network more particularly to a kind of decryption sides of VoLTE network SGI interface
Method and system.
Background technique
VoLTE (Voice over Long Term Evolution, audio are transmitted by LTE network) is a kind of IP data
Transmission technology, be not necessarily to 2G/3G net, whole service bearers on 4G network, it can be achieved that data and voice service are under consolidated network
Unification.In other words, the data service of high-speed is not only provided under 4G network, while the audio-video for also providing high quality is logical
Words, the latter just need VoLTE technology to realize.VoLTE technology, which brings 4G user, most directly to be experienced and is just to turn on the waiting time
Shorter and higher quality, more natural voice and video communication effect.VoLTE and 2G, 3G voice communication have essence not
Together.VoLTE is end-to-end speech scheme of framework under the conditions of full IP on 4G network.VoLTE compares 2G, 3G voice communication, language
Sound quality can improve 40% or so, because it uses high-resolution encoding and decoding technique.When VoLTE is that user brings lower access
Prolong (waiting time after dialing), than 3G drop 50%, probably at 2 seconds or so, and the 2G epoch were at 6-7 seconds.In addition, under 2G, 3G
Drop rate happens occasionally, but the drop rate of VoLTE is close to zero.So, the operating condition of a set of pair of communication network and equipment rises
The system of monitoring effect, which seems, to be even more important, and VoLTE monitoring system is that monitoring system the swiftest and the most violent is developed in current monitoring field.
VoLTE system is that signaling data is obtained from signaling link by the way of IP mirror image or light splitting acquisition, then
Data are analyzed, detailed forms data record is synthesized, detailed forms data record is counted, generates various businesses index KPI (Key
Performance Indicator, KPI Key Performance Indicator).We can understand the operation feelings of communication network profoundly in this way
Condition, to optimize the planning and designing etc. of network management, user management, service management and network.The call signalling flow of VoLTE from
EPC (Evolved Packet Core, evolved packet core) transparent transmission accesses IMS network, therefore Sgi interface by Sgi interface
Can be regarded as signaling data the first initiate point and final receiving station, closest to user terminal, therefore the signalling analysis of Sgi interface
The business service condition of user is represented the most.The signaling process of Sgi interface cannot be parsed, it is impossible to meet people to communication network
The monitoring requirements of network.Therefore, it is necessary to the demands decrypted to Sgi portal contents to study.
Summary of the invention
Technical problem to be solved by the present invention lies in providing the decryption method and system of a kind of VoLTE network SGI interface,
The problem of aiming to solve the problem that the signaling of the SGI interface in existing VoLTE network can not parse.
The invention is realized in this way a kind of decryption method of VoLTE network SGI interface, comprising the following steps:
Acquisition gateway acquires the signaling data of SGI interface, Mw, and is sent to SE-DD module；
The SE-DD module by the signaling data according to shunt rule shunt, be distributed to SGI interface module and
Mw module, wherein the SE-DD module is used for will according to SGI interface, the preconfigured IP of Mw and port rule
Signaling data is shunted；
Register and recovery process in the Mw resume module SIP signaling obtain decruption key Key-
Nonce corresponding relationship, and be sent to key management module, Register in the SGI interface modules handle SIP signaling and
Recovery process obtains Spi-nonce corresponding relationship, and is sent to the key management module, wherein and the Key indicates key,
Nonce indicates that the authentication parameter of Sip Register message, Spi indicate sequence number；
The key management module is according to the decruption key Key-nonce corresponding relationship got and the Spi-
Nonce corresponding relationship establishes SPI-Key corresponding relationship；
The SGI interface module receives subsequent SIP signaling, and is sent to the key management module, according to described close
The Key field that SPI-Key corresponding relationship in key management module returns, encrypted content is decrypted.
Further, the signaling data of the SGI interface is the signaling information by IPSec-ESP encrypted transmission mode.
Further, the SE-DD module shunts the signaling data according to rule is shunted, specifically:
The SE-DD module is according to SGI interface, the preconfigured IP of Mw and port rule by the signaling data
It is shunted.
The present invention also provides a kind of decryption systems of VoLTE network SGI interface, comprising:
Acquisition gateway, for acquiring the signaling data of SGI interface, Mw and being sent；
The signaling data is distributed to SGI for receiving the signaling data, and according to rule is shunted by SE-DD module
Interface module and Mw module, wherein the SE-DD module be used for according to SGI interface, the preconfigured IP of Mw and
Port rule shunts signaling data；
Mw module obtains decruption key Key- for handling Register and recovery process in SIP signaling
Nonce corresponding relationship, and it is sent to key management module, wherein the Key indicates that key, the nonce indicate Sip
The authentication parameter of Register message；
SGI interface module handles Register and recovery process in SIP signaling, obtains the corresponding pass Spi-nonce
System, is sent to key management module；And it receives subsequent SIP signaling and is sent to the key management module, according to described close
The Key field that SPI-Key corresponding relationship in key management module returns, encrypted content is decrypted, wherein the Spi table
Show sequence number；
Key management module, according to the decruption key Key-nonce corresponding relationship got and the Spi-nonce
Corresponding relationship establishes SPI-Key corresponding relationship, and returns to Key field to the SGI interface mould according to the SIP signaling received
Block.
Further, the signaling data of the SGI interface is the signaling information by IPSec-ESP encrypted transmission mode.
Further, the SE-DD module is according to SGI interface, the preconfigured IP of Mw and port rule by institute
Signaling data is stated to be shunted.
Compared with prior art, the present invention beneficial effect is: the decryption method of the VoLTE network SGI interface is logical
It crosses acquisition signaling data, shunt, and the signaling data after shunting is handled, obtain the corresponding pass decruption key Key-nonce
System and Spi-nonce corresponding relationship, establish SPI-Key corresponding relationship according to the corresponding relationship, so that key management module is connecing
Key field can be returned to after SIP signaling by receiving, and encrypted content is decrypted to SGI interface module.So as to which SGI interface is led to
The signaling for crossing IPSec-ESP encrypted transmission mode is decrypted, to facilitate the Network Quality Analysis for carrying out next step.The decryption side
Method greatly facilitates operator and statistics network KPI index and checks the calling trace of user in monitoring network communication system
Mark is conducive to the quick positioning of the network optimization and failure or problem.
Detailed description of the invention
Fig. 1 is the flow chart of the decryption method of VoLTE network SGI interface of the present invention；
Fig. 2 is the basic system figure of the decryption method of VoLTE network SGI interface of the present invention；
Fig. 3 is that the internal relations logic of key management module in Fig. 2 stores figure；
Fig. 4 is the schematic diagram of the related keyword information of signaling data flow chart and decrypting process；
Fig. 5 is IPSec-ESP protocol stack and the schematic diagram that data packet describes.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The decryption method of VoLTE network SGI interface of the invention can be associated with by SGI interface and Mw, parsing
The official information encrypted by IPSec-ESP transmission mode in SGI interface out.SGI interface and the corresponding application layer of Mw
Agreement is SIP (Session Initiation Protocol, session initiation protocol), Encryption Algorithm IPSec-ESP, ESP
The mode of (Extended stack pointer, stack pointer) is transmission mode.
It referring to figs. 1 and 2, is a preferred embodiment of the invention, a kind of decryption side of VoLTE network SGI interface
Method, comprising the following steps:
Step 1, acquisition gateway 202 acquire the signaling data 201 of SGI interface, Mw, and are sent to SE-DD module
203。
Step 2, SE-DD module 203 shunt signaling data 201 according to rule is shunted, and are distributed to SGI interface mould
Block 206 and Mw module 204.
The signaling data of SGI interface module 206 is the signaling information by IPSec-ESP encrypted transmission mode.
SE-DD module 203 shunts signaling data 201 according to rule is shunted, specifically: 203 basis of SE-DD module
The preconfigured IP of SGI interface, Mw and port rule shunt signaling data 201.
Step 3, Mw module 204 handle Register (registration) and recovery process in SIP signaling, obtain decryption
Key Key-nonce corresponding relationship, and it is sent to key management module 205, SGI interface module 206 is handled in SIP signaling
Register and recovery process obtain Spi-nonce corresponding relationship, and are sent to key management module 205.
The 401 of the Register of the processing of Mw module 204 Sip reply message, and are judged whether according to sip message content
There is IPSec-ESP encryption instruction then to obtain key if there is encryption indicates, Nonce field, and send corresponding relationship to close
Key management module 205.
The Register of the processing of SGI interface module 206 Sip and corresponding 401 message, go back unencryption at this time.According to SIP
Message content can be parsed out the spi-c of UE, spi-c, spi-s and the Nonce of spi-s, PCSCF, Encryption Algorithm, encryption
Mode, cryptographic protocol, key.If cryptographic protocol is ESP, encryption mode is transmission mode, then by spi-c, the spi-s of UE,
Spi-c, spi-s and the Nonce of PCSCF, Encryption Algorithm, key are sent to key management module 205.
Step 4, key management module 205 are according to the decruption key Key-nonce corresponding relationship and Spi-nonce got
Corresponding relationship establishes SPI-Key corresponding relationship.
The Mw that key management module 205 will receive, Sgi relevant information, are associated with according to Nonce, establish UE-SPI-C, UE-
SPI-S, PCSCF-SPI-C, PCSCF-SPI-S, Encryption Algorithm, the corresponding relationship of key.
Step 5, SGI interface module 206 receive subsequent SIP signaling, and are sent to key management module 205, according to close
The Key field that key management module 205 returns, encrypted content is decrypted.
SGI interface module 206 is successfully received sip message, if the upper-layer protocol of IP is designated as SPI, SPI is sent to close
Key management module 205, key management module 205 search corresponding Encryption Algorithm and key according to SPI, return result to SGI
Interface.SGI interface module 206 parses clear content, makees subsequent processing according to the key and algorithm that receive.
As shown in Fig. 2, a kind of decryption system of VoLTE network SGI interface, comprising: acquisition gateway 202, SE-DD module
203, Mw module 204, SGI interface module 206 and key management module 205.
Acquisition gateway 202 is for acquiring the signaling data 201 of SGI interface, Mw and being sent.
SE-DD module 203 shunt and will be after shunting for receiving signaling data 201, and according to rule is shunted
Signaling data 201 is distributed to SGI interface module 206 and Mw module 204.
Mw module 204 is used to handle the Register and recovery process in SIP signaling, obtains decruption key Key-
Nonce corresponding relationship, and it is sent to key management module 205.
SGI interface module 206 handles the Register and recovery process in SIP signaling, obtains the corresponding pass Spi-nonce
System, is sent to key management module 205, and receive subsequent SIP signaling and be sent to key management module 205, according to key
The Key field that management module 205 returns, encrypted content is decrypted.
Key management module 205 is closed according to the decruption key Key-nonce corresponding relationship and Spi-nonce that get are corresponding
System establishes SPI-Key corresponding relationship, and returns to Key field to SGI interface module 206 according to the SIP signaling received.
The signaling data of SGI interface is the signaling information by IPSec-ESP encrypted transmission mode.
SE-DD module 203 according to SGI interface, the preconfigured IP of Mw and port rule by signaling data 201 into
Row shunts.
As shown in figure 3, the internal relations logic for key management module 205 stores figure.Wherein, Key indicates key, ealg
For Encryption Algorithm, Nonce be the authentication parameter of Sip Register message, SGI interface and Mw by with key management mould
The interaction of block 205 achievees the purpose that obtain complete deciphering parameter.
The internal relations of key management module 205 and the interaction between external modules, specific as follows:
After step 101, key management module 205 receive the Nonce-Key corresponding relationship of Mw module 204, module
Inside establishes it and hints obliquely at relation table T1.
Step 102, key management module 205 receive Nonce- < UE-SPI-C, the UE-SPI-S of SGI interface module 206,
PCSCF-SPI-C, PCSCF-SPI-S after ealg > corresponding relationship, are searched in T1 table according to Nonce, according to lookup result
Foundation<UE-SPI-S, PCSCF-SPI-S>-<Key, ealg>mapping table T2, and delete the Nonce corresponding content of T1.
Step 103, key management module 205 receive the request message of SGI, search Key, ealg according to SPI.Wherein, SGI
Interface module 206 may determine that SPI is to belong to UE-SPI-S either to belong to PCSCF- according to the sending direction of original signaling
SPI-S。
Key, the ealg that step 104, key management module 205 are found according to SPI, return to SGI interface module 206,
SGI can complete decryption work according to key, algorithm.
As shown in figure 4, being signaling data flow chart and decrypting process related keyword information.The figure mainly describes between interface
Signalling exchange and signaling message carry main contents.
Message (1), unencryption, the Register request message of UE uplink carry Call-ID, SPI-C, SPI-S, wherein
Call-ID is used for the internal correlation of SGI interface.
Message (2), unencryption, the Register message of PCSCF forwarding mainly carry Call-ID, in Mw
Portion's association.
Message (3), unencryption carry Call-ID, Nonce, Key (key), and Call-ID is used for Mw internal correlation,
Nonce is used for and SGI interface conjunctionn, and Key is for decrypting.
Message (4), unencryption carry Call-ID, Nonce, PCSCF-SPI-C, and (encryption is calculated by PCSCF-SPI-S, eagle
Method), Mod (encryption mode).Call-ID is associated with for SGI interface internal, and Nonce with Mw for being associated with, PCSCF-SPI-
For decrypting, Mod judges encryption mode by C, PCSCF-SPI-S, eagle.
Wherein, belong to encrypted negotiation stage, equal unencryption according to message (1), (2), (3), (4).It can establish complete
Deciphering parameter.
Message (5), message (6) are postorder signaling message, encrypted content.The SPI that wherein message (5) carries is UE-SPI-
S, the SPI that message (6) carries are PCSCF-SPI-S.
As shown in figure 5, for the description of IPSec-ESP protocol stack and data packet, the transmission to being run on IPv4/IPv6
For mode application, ESP after IP.IP protocol fields are copied to ESP " next head " field
In, ESP remaining field is then filled, and padding sequence field is next value in sequence.Filling data can be inserted
Enter, value is assigned.The also filling length value of distribution simultaneously.Then what IP protocol fields obtained is the value of ESP.
The decryption method and decryption system of the VoLTE network SGI interface pass through acquisition signaling data 201, shunt, and
Signaling data 201 after shunting is handled, decruption key Key-nonce corresponding relationship and the corresponding pass Spi-nonce are obtained
System, establishes SPI-Key corresponding relationship according to the corresponding relationship, so that key management module 205 can be returned after receiving SIP signaling
Key field is returned encrypted content is decrypted to SGI interface module 206.So as to which SGI interface is added by IPSec-ESP
The signaling of close transmission mode is decrypted, to facilitate the Network Quality Analysis for carrying out next step.The decryption method greatly facilitates
The calling trace of user statistics network KPI index and is checked in monitoring network communication system by operator, is conducive to network
Optimization and the quick positioning of failure or problem.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of decryption method of VoLTE network SGI interface, which comprises the following steps:
Acquisition gateway acquires the signaling data of SGI interface, Mw, and is sent to SE-DD module；
The SE-DD module shunts the signaling data according to rule is shunted, and is connect with being distributed to SGI interface module and Mw
Mouth mold block, wherein the SE-DD module is used for signaling according to SGI interface, the preconfigured IP of Mw and port rule
Data are shunted；
Register and recovery process in the Mw resume module SIP signaling obtain Key-nonce pairs of decruption key
It should be related to, and be sent to key management module, the Register and stream of reply in the SGI interface modules handle SIP signaling
Journey obtains Spi-nonce corresponding relationship, and is sent to the key management module, wherein the Key indicates key, described
Nonce indicates that the authentication parameter of Sip Register message, the Spi indicate sequence number；
The key management module is according to the decruption key Key-nonce corresponding relationship got and the Spi-nonce
Corresponding relationship establishes SPI-Key corresponding relationship；
The SGI interface module receives subsequent SIP signaling, and is sent to the key management module, according to the key pipe
The Key field that the SPI-Key corresponding relationship in module returns is managed, encrypted content is decrypted.
2. decryption method according to claim 1, which is characterized in that the signaling data of the SGI interface is to pass through
The signaling information of IPSec-ESP encrypted transmission mode.
3. decryption method according to claim 1, which is characterized in that the SE-DD module by the signaling data according to
Rule is shunted to be shunted, specifically:
The SE-DD module carries out the signaling data according to SGI interface, the preconfigured IP of Mw and port rule
It shunts.
4. a kind of decryption system of VoLTE network SGI interface characterized by comprising
Acquisition gateway, for acquiring the signaling data of SGI interface, Mw and being sent；
The signaling data is distributed to SGI interface for receiving the signaling data, and according to rule is shunted by SE-DD module
Module and Mw module, wherein the SE-DD module is used for according to SGI interface, the preconfigured IP of Mw and port
Rule shunts signaling data；
Mw module obtains decruption key Key-nonce for handling Register and recovery process in SIP signaling
Corresponding relationship, and it is sent to key management module, wherein the Key indicates that key, the nonce indicate Sip Register
The authentication parameter of message；
SGI interface module handles Register and recovery process in SIP signaling, obtains Spi-nonce corresponding relationship, hair
Give key management module；And it receives subsequent SIP signaling and is sent to the key management module, according to the key management
The Key field that SPI-Key corresponding relationship in module returns, encrypted content is decrypted, wherein the Spi indicates sequence
Number；
Key management module, it is corresponding according to the decruption key Key-nonce corresponding relationship got and the Spi-nonce
Relationship establishes SPI-Key corresponding relationship, and returns to Key field to the SGI interface module according to the SIP signaling received.
5. decryption system according to claim 4, which is characterized in that the signaling data of the SGI interface is to pass through
The signaling information of IPSec-ESP encrypted transmission mode.
6. decryption system according to claim 4, which is characterized in that the SE-DD module is according to SGI interface, Mw
Preconfigured IP and port rule shunt the signaling data.
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| CN108243057B (en) * | 2016-12-27 | 2021-08-13 | 中国移动通信集团浙江有限公司 | VoLTE conversion rate analysis method and system |
| CN109120572A (en) * | 2017-06-22 | 2019-01-01 | 中兴通讯股份有限公司 | SIP signaling decryption method, device, system and computer readable storage medium |
| CN109714293B (en) * | 2017-10-25 | 2021-08-10 | 中国移动通信有限公司研究院 | VoLTE data traffic filtering method, device, gateway, equipment and medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026615A (en) * | 2006-02-18 | 2007-08-29 | 华为技术有限公司 | IMS-based flow media network system |
| CN101997676A (en) * | 2009-08-28 | 2011-03-30 | 中国移动通信集团公司 | VoIP voice encryption protection method, node and system |
| CN104168205A (en) * | 2014-08-06 | 2014-11-26 | 杭州华三通信技术有限公司 | Message processing method and device |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026615A (en) * | 2006-02-18 | 2007-08-29 | 华为技术有限公司 | IMS-based flow media network system |
| CN101997676A (en) * | 2009-08-28 | 2011-03-30 | 中国移动通信集团公司 | VoIP voice encryption protection method, node and system |
| CN104168205A (en) * | 2014-08-06 | 2014-11-26 | 杭州华三通信技术有限公司 | Message processing method and device |
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Address after: 401120 No.2, 7th floor, Fenghuang a building, No.18, Qingfeng North Road, Yubei District, Chongqing Patentee after: Broid Technology Co.,Ltd. Address before: 518057 No.1, area a, 3 / F, B1 building, Gaoxin South 7th road digital technology park, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BROADTECH Co.,Ltd. |
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