CN113438220B - Method for converting IP address in soft switching communication system and soft switching communication system - Google Patents
Method for converting IP address in soft switching communication system and soft switching communication system Download PDFInfo
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- CN113438220B CN113438220B CN202110691033.5A CN202110691033A CN113438220B CN 113438220 B CN113438220 B CN 113438220B CN 202110691033 A CN202110691033 A CN 202110691033A CN 113438220 B CN113438220 B CN 113438220B
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- 238000004891 communication Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010586 diagram Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
Abstract
The invention discloses a method for converting IP address in soft switch communication system and soft switch communication system, the method includes: the session border controller receives a first message of the telephone terminal, wherein the first message comprises a first contact address; resolving the first contact address into a telephone terminal extension number, a first IP address and a first port; the session boundary controller acquires a second IP address and a second port of the soft switch end; combining the telephone terminal extension number, the first IP address, the first port, the second IP address and the second port into a second connection address, modifying the first connection address in the first message into the second connection address and generating a second message; the session border controller forwards the second message to the soft switch side. The method for converting the IP address in the soft switching communication system and the soft switching communication system provided by the invention have the advantages that the session boundary controller directly puts the telephone contact address into the SIP message for carrying when the message is forwarded, and the efficiency of delivering the message to the correct position is improved.
Description
Technical Field
The present invention relates to a method and a system for converting an IP address, and in particular, to a method and a system for converting an IP address in a soft switch communication system.
Background
In a soft switch communication system with session initiation protocol (SIP, session Initial Protocol) as a standard, a session border controller (SBC, session Border Controller) needs to be deployed between the phone network and the software switch to implement cross-network forwarding of SIP messages for reasons of isolation of the phone network from the soft switch network. In the process of forwarding the SBC message, the Contact address (Contact address) of the phone must be converted, so that the SIP message can normally arrive.
The method adopted in the prior art is that the original Contact address of the matched telephone is stored in the memory of the SBC, when the message is returned from the soft switch, the SBC needs to search the Contact address corresponding to the telephone from the memory, but the method can cause the memory occupation to be increased when the flow is larger, the reaction speed to be slower, and the address information stored in the memory is lost when the SBC is restarted, so that the subsequent message is unreachable.
Accordingly, there is a need to provide a method of efficiently converting IP addresses in a soft-switched communication system.
Disclosure of Invention
The invention aims to provide a method and a device for converting IP addresses in a soft switch communication system, and a session boundary controller directly puts a telephone contact address into an SIP message for carrying when the message is forwarded, so that the efficiency of delivering the message to a correct position is improved.
The technical scheme adopted by the invention for solving the technical problems is to provide a method for converting IP addresses in a soft switching communication system, which comprises the following steps:
the method comprises the steps that a session boundary controller receives a first message of a telephone end, wherein the first message comprises a first contact address;
resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
the session boundary controller acquires a second IP address and a second port facing the soft switch end;
combining the telephone terminal extension number, the first IP address, the first port, the second IP address and the second port into a second connection address, modifying the first connection address in the first message into the second connection address and generating a second message;
and the session border controller forwards the second message to the soft switch end.
Preferably, the session border controller receives a third message of the soft switch end, where the third message includes the second link address;
resolving the second connection address into the telephone terminal extension number, the first IP address and the first port;
combining the telephone terminal extension number, the first IP address and the first port into the first contact address, modifying the second contact address in the third message into the first contact address and generating a fourth message;
and the session border controller forwards the fourth message to the telephone terminal.
Preferably, the first IP address and the first port are stored in a custom field.
Preferably, before receiving a first message of a phone end, the session border controller judges whether the first message contains a contact address, if the first message contains the contact address, the session border controller converts the first message into a second message and sends the second message to the soft switch end; before receiving the third message of the exchanger, the session boundary controller judges whether the third message contains a contact address, and if the third message contains the contact address, the session boundary controller converts the third message into a fourth message and sends the fourth message to the telephone terminal.
Preferably, there are a plurality of session border controllers, and when one session border controller fails, the other session border controller receives the first message of the phone terminal.
The invention also provides a soft switch communication system, which comprises a telephone, a session boundary controller and a soft switch end, wherein the session boundary controller comprises:
the receiving unit is used for receiving a first message of the telephone terminal, wherein the first message comprises a first contact address;
the resolving unit is used for resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
the acquisition unit is used for acquiring a second IP address and a second port facing the soft switch end;
a combining unit, configured to combine the phone-side extension number, the first IP address, the first port, the second IP address, and the second port to form a second connection address, modify the first contact address in the first message to form a second connection address, and generate a second message;
and the forwarding unit is used for forwarding the second message to the soft switch end.
Preferably, the receiving unit is further configured to receive a third message at the soft switch end, where the third message includes the second link address;
the resolving unit is further configured to resolve the second connection address into the phone extension number, the first IP address, and the first port;
the combining unit is further configured to combine the phone-side extension number, the first IP address, and the first port to the first contact address, modify the second contact address in the third message to the first contact address, and generate a fourth message;
the forwarding unit is further configured to forward the fourth message to the phone end.
Preferably, the first IP address and the first port are stored in a custom field.
Preferably, before receiving a first message of a phone end, the session border controller judges whether the first message contains a contact address, if the first message contains the contact address, the session border controller converts the first message into a second message and sends the second message to the soft switch end; before receiving the third message of the soft switch end, the session boundary controller judges whether the third message contains a contact address, and if the third message contains the contact address, the session boundary controller converts the third message into a fourth message and sends the fourth message to the telephone end.
Preferably, there are a plurality of session border controllers, and when one session border controller fails, the other session border controller receives the first message of the phone terminal.
Compared with the prior art, the invention has the following beneficial effects: the method for converting the IP address in the soft switch communication system and the soft switch communication system provided by the invention have the advantages that the original contact address of the telephone terminal is directly put into the SIP message for carrying when the first message is sent, and the contact address carried in the message is directly decomposed and analyzed as the original contact address of the telephone terminal when the third message of the soft switch terminal is forwarded, so that the efficiency of sending the message to the correct position is greatly improved, and the error rate is reduced.
Further, the first IP address and the first port are stored in a custom field, so that the first IP address and the first port are convenient to carry in an SIP message, a memory table is not required to be established in a session border controller, the memory table is not required to be maintained, and the memory content in the session border controller is not lost during restarting;
further, when one of the session border controllers fails, the other session border controller receives the first message of the phone terminal, thereby ensuring the accuracy of message delivery and avoiding influencing the message delivery due to the failure of the session border controller.
Drawings
Fig. 1 is a flowchart of a method for converting an IP address in a soft switch communication system according to an embodiment of the present invention;
fig. 2 is a flow chart of a method for converting an IP address in a soft switch communication system according to another embodiment of the present invention;
fig. 3 is a block diagram of a soft switch communication system according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. Accordingly, the specific details are set forth merely as examples, and the specific details may vary from the spirit and scope of the disclosure and are still considered within the spirit and scope of the disclosure.
In a soft switch communication system using SIP as a standard, an SBC needs to be deployed between a phone-side network and a software switch-side network for isolating the phone-side network from the soft switch-side network, so as to implement cross-network forwarding of SIP messages. In the process of forwarding the SBC message, the contact address of the phone must be converted, so that the SIP message can normally arrive.
In the prior art, when the SBC processes a message from a phone-side network to a soft switch-side network, the SBC stores an original contact address of the phone, for example, SIP:5001@192.168.1.11:5060, in a memory list, and modifies the original contact address to a contact address of the soft switch-side, for example, SIP:5001@10.10.1.5:5060, and sends the original contact address to the soft switch-side.
When the message sent from the soft switch end to the telephone end reaches the SBC, the SBC searches the corresponding telephone from the memory list, for example, the extension number is 5001, the original contact address is saved, and the message is forwarded to the matched original contact address.
However, the method of storing the original contact address of the matched telephone in the memory of the SBC, when the message is returned from the soft switch end, the SBC searches the contact address corresponding to the telephone from the memory, which can cause the problems that the memory occupation of the SBC is increased, the response speed is slow and the contact address information stored in the memory is lost when the SBC is restarted, so that the follow-up message is not reachable.
Referring now to fig. 1, fig. 1 is a flow chart illustrating a method for translating IP addresses in a soft-switched communication system in accordance with an embodiment of the present invention. The embodiment of the invention provides a method for converting IP addresses in a soft switching communication system, which comprises the following steps:
step 101: the method comprises the steps that a session boundary controller receives a first message of a telephone end, wherein the first message comprises a first contact address;
step 102: resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
step 103: the session boundary controller acquires a second IP address and a second port facing the soft switch end;
step 104: combining the telephone terminal extension number, the first IP address, the first port, the second IP address and the second port into a second connection address, modifying the first connection address in the first message into the second connection address and generating a second message;
step 105: and the session border controller forwards the second message to the soft switch end.
The first contact address may be, for example, SIP 5001@192.168.1.11:5060, where the phone-side extension number is 5001, the first IP address is 192.168.1.11, and the first port is 5060. The second connection address may be, for example, SIP:10.10.1.5:5060, where the second IP address is 10.10.1.5 and the second port is 5060. Combining the telephone extension number, the first IP address, the first port, the second IP address, and the second port into a second connection address, i.e., combining the telephone extension number 5001, the first IP address 192.168.1.11, the first port 5060, the second IP address 10.10.1.5, and the second port 5060 into a second connection address SIP:5001@10.10.1.5:5060; phoneip=192.168.1.11:5060. Those skilled in the art will appreciate that the values of the first port and the second port may be different, and will not be described herein.
In a specific implementation, the first IP address 192.168.1.1 and the first port 5060 are stored in a custom field, for example, the first IP address=192.168.1.11:5060 is a custom field, and may also be set to other custom fields, which are not described herein.
Specifically, before the session border controller receives a first message of a phone end, judging whether the first message contains a contact address, if so, converting the first message into a second message, and sending the second message to the soft switch end; before receiving the third message of the soft switch end, the session boundary controller judges whether the third message contains a contact address, and if the third message contains the contact address, the session boundary controller converts the third message into a fourth message and sends the fourth message to the telephone end.
In a specific implementation, the session border controllers are multiple, and when one session border controller fails, the other session border controller receives the first message of the phone end.
Referring now to fig. 2, fig. 2 is a flow chart of a method for translating IP addresses in a soft-switched communication system in accordance with another embodiment of the present invention. The embodiment of the invention provides a method for converting IP addresses in a soft switching communication system, which comprises the following steps:
step 201: the method comprises the steps that a session boundary controller receives a first message of a telephone end, wherein the first message comprises a first contact address;
step 202: resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
step 203: the session boundary controller acquires a second IP address and a second port facing the soft switch end;
step 204: combining the telephone terminal extension number, the first IP address, the first port, the second IP address and the second port into a second connection address, modifying the first connection address in the first message into the second connection address and generating a second message;
step 205: the session border controller forwards the second message to the soft switch end;
step 206: the session border controller receives a third message of the soft switch end, wherein the third message comprises the second link address;
step 207: resolving the second connection address into the telephone terminal extension number, the first IP address and the first port;
step 208: combining the telephone terminal extension number, the first IP address and the first port into the first contact address, modifying the second contact address in the third message into the first contact address and generating a fourth message;
step 209: and the session border controller forwards the fourth message to the telephone terminal.
The first contact address may be, for example, SIP 5001@192.168.1.11:5060, where the phone-side extension number is 5001, the first IP address is 192.168.1.11, and the first port is 5060. The second connection address may be, for example, SIP:10.10.1.5:5060, where the second IP address is 10.10.1.5 and the second port is 5060. Combining the telephone extension number, the first IP address, the first port, the second IP address, and the second port into a second connection address, i.e., combining the telephone extension number 5001, the first IP address 192.168.1.11, the first port 5060, the second IP address 10.10.1.5, and the second port 5060 into a second connection address SIP:5001@10.10.1.5:5060; phoneip=192.168.1.11:5060
In a specific implementation, the first IP address 192.168.1.1 and the first port 5060 are stored in a custom field, for example, the first IP address=192.168.1.11:5060 is a custom field, and may also be set to other custom fields, which are not described herein.
The telephone extension, the first IP address and the first port are combined to the first contact address, i.e. the telephone extension 5001, the first IP address 192.168.1.11 and the first port combination 5060 are the first contact address SIP:5001@192.168.1.11:5060.
The following will illustrate the examples in detail:
the SBC acquires the original contact address of the telephone in the telephone end registration message, namely a first contact address: for example, may be SIP 5001@192.168.1.11:5060.
Splitting the first contact address into extension 5001, first IP address 192.168.1.11 and first port 5060;
obtaining a second IP address and a second port of the SBC facing the soft switch system, for example, may be 10.10.1.5:5060;
recombining the telephone extension number, the first IP address, the first port, the second IP address and the second port to form a second connection address as a second connection address: the format is SIP, extension number @ SBC local IP address: port; phoneIP = phone original IP: port, phoneIP is a custom field. The recombined second link address may be, for example: SIP:5001@10.10.1.5:5060; phoneip=192.168.1.11:5060. Modifying the first contact address in the first message to a second contact address and generating a second message, e.g., the second message includes the second contact address SIP:5001@10.10.1.5:5060; phoneip=192.168.1.11:5060;
the SBC forwards the second message to the soft switch end;
the SBC receives a third message of the soft switch end, wherein the third message comprises the second link address; the SBC obtains the content of the request target address in the third message sent by the soft switching system end, namely the second link address, for example, the request target address can be SIP (session initiation protocol) 5001@10.10.1.5:5060; phoneip=192.168.1.11:5060;
the extension number, the first IP address, and the first port of the phone end are resolved from the request destination address, for example, the extension number 5001, the first IP address 192.168.1.11, and the first port 5060, and the first IP address 192.168.1.11, and the first port 5060 are stored in the custom field phoneIP.
Combining the telephone extension number, the first IP address and the first port to the first contact address, for example, the first contact address may be SIP:5001@192.168.1.11:5060, and the second contact address in the third message may be SIP:5001@10.10.1.5:5060; phoneip=192.168.1.11:5060, modified to the first contact address, which may be SIP:5001@192.168.1.11:5060 for example, and generates a fourth message;
the message is sent to the recombined first contact address, which may be SIP, 5001@192.168.1.11:5060, for example, and the fourth message arrives at the phone end.
Referring now to fig. 3, fig. 3 is a block diagram of a soft-switched communication system in accordance with an embodiment of the present invention. The technical scheme adopted by the invention for solving the technical problems is that the invention also provides a soft switch communication system, which comprises a telephone terminal 31, a session border controller 32 and a soft switch terminal 33, wherein the session border controller 32 specifically comprises:
a receiving unit 321, configured to receive a first message of the phone end 31, where the first message includes a first contact address;
a parsing unit 322, configured to parse the first contact address into an extension number of the phone end 31, a first IP address, and a first port;
an obtaining unit 323, configured to obtain a second IP address and a second port facing the soft switch end 33;
a combining unit 324, configured to combine the extension number of the phone end 31, the first IP address, the first port, the second IP address, and the second port into a second connection address, modify the first contact address in the first message into the second connection address, and generate a second message;
a forwarding unit 325 for forwarding the second message to the soft switch end 33.
In an implementation manner, the receiving unit 321 is further configured to receive a third message of the soft switch end 33, where the third message includes the second link address;
the parsing unit 322 is further configured to parse the second connection address into the phone extension number, the first IP address, and the first port;
the combining unit 324 is further configured to combine the extension number of the phone end 31, the first IP address, and the first port to the first contact address, modify the second contact address in the third message to the first contact address, and generate a fourth message;
the forwarding unit 325 is further configured to forward the fourth message to the phone end 31.
Specifically, the first IP address and the first port are stored in a custom field.
In a specific implementation, before the session border controller 32 receives the first message of the phone terminal 31, it is determined whether the first message of the phone terminal 31 includes a contact address, if the first message includes a contact address, the first message is sent to the session border controller 32, and the session border controller 32 converts the first message into the second message and forwards the second message to the soft switch terminal 33.
In a specific implementation, before the session border controller 32 receives the third message of the soft switch end 33, it determines whether the third message of the soft switch end 33 includes a contact address, if the third message includes a contact address, the third message is sent to the session border controller 32, and the session border controller 32 converts the third message into a fourth message and sends the fourth message to the phone end 31.
In a specific implementation, there are a plurality of session border controllers 32, and when one session border controller 32 fails, the other session border controller 32 receives the first message of the phone terminal 31.
In summary, the method for converting the IP address in the soft switch communication system and the soft switch communication system provided by the present invention directly put the original contact address of the phone end into the SIP message for carrying when sending the first message, directly decompose and resolve the contact address carried in the message as the original contact address of the phone end when forwarding the third message of the soft switch end, thereby greatly improving the efficiency of sending the message to the correct position and reducing the error rate.
Further, the first IP address and the first port are stored in a custom field, so that the first IP address and the first port are convenient to carry in an SIP message, a memory table is not required to be established in a session border controller, the memory table is not required to be maintained, and the memory content in the session border controller is not lost during restarting;
further, when one of the session border controllers fails, the other session border controller receives the first message of the phone terminal, thereby ensuring the accuracy of message delivery and avoiding influencing the message delivery due to the failure of the session border controller.
Those of ordinary skill in the art will appreciate that the elements and steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements and steps of the examples have been described generally in terms of functionality in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications may be made to the technical solutions described in the above embodiments or equivalents may be substituted for some of the technical features thereof, and these modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention in essence.
Claims (6)
1. A method for converting an IP address in a soft switching communication system, comprising the steps of:
the method comprises the steps that a session boundary controller receives a first message of a telephone end, wherein the first message comprises a first contact address;
resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
the session boundary controller acquires a second IP address and a second port facing the soft switch end;
combining the telephone terminal extension number, the first IP address, the first port, the second IP address and the second port into a second connection address, modifying the first connection address in the first message into the second connection address and generating a second message;
the session border controller forwards the second message to the soft switch end;
the session border controller receives a third message of the soft switch end, wherein the third message comprises the second link address;
resolving the second connection address into the telephone terminal extension number, the first IP address and the first port;
combining the telephone terminal extension number, the first IP address and the first port into the first contact address, modifying the second contact address in the third message into the first contact address and generating a fourth message;
the session border controller forwards the fourth message to the telephone terminal;
before the session border controller receives a first message of a telephone terminal, judging whether the first message contains a contact address, if so, converting the first message into a second message and sending the second message to the soft switch terminal; before receiving the third message of the soft switch end, the session boundary controller judges whether the third message contains a contact address, and if the third message contains the contact address, the session boundary controller converts the third message into a fourth message and sends the fourth message to the telephone end.
2. The method for converting an IP address in a soft-switched communication system as claimed in claim 1, wherein,
the first IP address and the first port are stored in a custom field.
3. The method for converting an IP address in a soft-switched communication system as claimed in claim 1, wherein,
the session border controllers are multiple, and when one session border controller fails, the other session border controller receives the first message of the telephone terminal.
4. A soft switch communication system comprising a phone, a session border controller and a soft switch end, the session border controller, characterized in that the session border controller comprises:
the receiving unit is used for receiving a first message of the telephone terminal, wherein the first message comprises a first contact address;
the resolving unit is used for resolving the first contact address into a telephone terminal extension number, a first IP address and a first port;
the acquisition unit is used for acquiring a second IP address and a second port facing the soft switch end;
a combining unit, configured to combine the phone-side extension number, the first IP address, the first port, the second IP address, and the second port to form a second connection address, modify the first contact address in the first message to form a second connection address, and generate a second message;
a forwarding unit, configured to forward the second message to the soft switch end;
before the session border controller receives a first message of a telephone terminal, judging whether the first message contains a contact address, if so, converting the first message into a second message and sending the second message to the soft switch terminal; before receiving a third message of the soft switch end, the session boundary controller judges whether the third message contains a contact address, and if the third message contains the contact address, the session boundary controller converts the third message into a fourth message and sends the fourth message to the telephone end;
the receiving unit is further configured to receive a third message at the soft switch end, where the third message includes the second link address;
the resolving unit is further configured to resolve the second connection address into the phone extension number, the first IP address, and the first port;
the combining unit is further configured to combine the phone-side extension number, the first IP address, and the first port to the first contact address, modify the second contact address in the third message to the first contact address, and generate a fourth message;
the forwarding unit is further configured to forward the fourth message to the phone end.
5. The soft-switched communication system as claimed in claim 4, wherein,
the first IP address and the first port are stored in a custom field.
6. The soft-switched communication system as claimed in claim 4, wherein,
the session border controllers are multiple, and when one session border controller fails, the other session border controller receives the first message of the telephone terminal.
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