CN110913010A - SIP service cluster system and implementation method - Google Patents
SIP service cluster system and implementation method Download PDFInfo
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- CN110913010A CN110913010A CN201911233602.0A CN201911233602A CN110913010A CN 110913010 A CN110913010 A CN 110913010A CN 201911233602 A CN201911233602 A CN 201911233602A CN 110913010 A CN110913010 A CN 110913010A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1012—Server selection for load balancing based on compliance of requirements or conditions with available server resources
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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
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1034—Reaction to server failures by a load balancer
Abstract
A SIP service cluster system and a realization method thereof are provided, the system comprises: LB, when receiving the SIP message from the user terminal, extracting the IP address and port of the user terminal from the source address and port of the IP packet carrying the SIP message, and selecting an SIP service server, then directly encapsulating the SIP message into a new IP packet, setting the source address and port of the IP packet as the IP address and port of the user terminal, and finally sending the IP packet to the selected SIP service server; before sending SIP message to user terminal, SIP service server carries its own external SIP service address and port in its field or parameter, then encapsulates SIP message into a new IP packet, sets the source address and port of IP packet as LB external address and port providing SIP service, and sends IP packet. The invention belongs to the technical field of information, and can have higher reliability and performance.
Description
Technical Field
The invention relates to an SIP service cluster system and an implementation method thereof, belonging to the technical field of information.
Background
SIP (Session Initiation Protocol) is a part of IETF standard, and is widely applied to IMS (IP Multimedia Subsystem), and is popularized and popularized in Voice over lte (long term Evolution Voice bearer).
NFV (network function virtualization) is a private dedicated device that replaces the communication network with standard x86 servers, storage and switching devices. The IT equipment of the x86 standard has the characteristics of low cost, open API interface and the like, can save cost, increase flexibility of network capacity and open API capacity, is adopted by operators and is gradually applied to 5G networks, so that NFV of SIP services is a necessary trend.
The SIP service is typically a clustered system, consisting of a SIP load balancer and a set of SIP service servers. The common SIP service trunking system is mainly implemented by the following two SIP load balancers:
1. full-proxy SIP load balancer: all SIP messages sent by the external SIP entity pass through the SIP load balancer and then reach the SIP service server, and all SIP messages sent by the SIP service server pass through the SIP load balancer and then reach the external SIP entity, so the technical scheme can achieve high reliability, but the performance of the technical scheme has a bottleneck point.
2. Initial request distributed SIP load balancer: the SIP initial request message sent by the external SIP entity passes through the SIP load balancer and then reaches the SIP service server, other subsequent messages are directly sent to the SIP service server, and all the SIP messages sent by the SIP service server also directly reach the external SIP entity, so the technical scheme has high performance, but high reliability cannot be realized.
Therefore, how to enable the SIP service trunking system to have higher reliability and performance at the same time has become a technical problem generally focused on by technicians.
Disclosure of Invention
In view of this, the present invention provides an SIP service trunking system and an implementation method thereof, which can enable the SIP service trunking system to have higher reliability and performance at the same time.
In order to achieve the above object, the present invention provides an SIP service trunking system, which comprises an SIP load balancer and a plurality of SIP service servers, where the SIP load balancer is abbreviated as LB, where:
LB, when receiving the SIP message from the external user terminal, extracting the IP address and port of the user terminal sending the message from the source address and port of the IP packet bearing the SIP message, and selecting a SIP service server for the SIP message: judging whether the SIP message is an initial request message, if so, selecting an SIP service server according to a set load balancing algorithm, and if not, selecting a corresponding SIP service server according to fields or parameters carried in the SIP message; then, directly packaging the SIP message into a new IP packet, and setting the source address and the port of the IP packet as the IP address and the port of the user terminal; finally, the IP packet is sent to the selected SIP service server;
before sending SIP message to user terminal, SIP service server carries its own external SIP service address and port data in the field or parameter of SIP message to be sent, then encapsulates SIP message into a new IP packet, sets the source address and port of IP packet as LB external address and port providing SIP service, and finally sends IP packet.
In order to achieve the above object, the present invention further provides a method for implementing an SIP service cluster, which includes an SIP load balancer and a plurality of SIP service servers, where the SIP load balancer is abbreviated as LB, and when the LB receives an SIP message sent by an external user terminal, the method includes:
step one, LB extracts IP address and port of user terminal sending message from source address and port of IP packet bearing SIP message, and judges whether SIP message is initial request message, if yes, selects a SIP service server according to set load balancing algorithm, then continues the next step; if not, selecting a corresponding SIP service server according to the field or the parameter carried in the SIP message, and continuing the next step;
step two, LB encapsulates SIP message into a new IP packet directly, and sets the source address and port of IP packet as the IP address and port of user terminal, then sends the IP packet to the selected SIP service server;
and step three, before the SIP service server sends the SIP message to the user terminal, carrying the external SIP service address and port data in the field or parameter of the SIP message to be sent, then encapsulating the SIP message into a new IP packet, setting the source address and port of the IP packet as the address and port of LB external SIP service, and finally sending the IP packet to the user terminal.
Compared with the prior art, the invention has the beneficial effects that: compared with the defects of the traditional SIP service cluster system in performance or reliability, all SIP messages sent to the SIP service server by the external user terminal are required to pass through LB, LB does not reassemble the received SIP messages, but directly encapsulates the SIP messages into a new IP packet to be sent to the SIP service server, and meanwhile, the SIP service server directly sends the SIP messages to the user terminal without passing through LB, so that high reliability is guaranteed, meanwhile, the performance consumption of LB is reduced as much as possible, and the system is guaranteed to achieve higher performance; when a certain SIP service server fails, other SIP service servers can take over the failed SIP service server to continue processing services.
Drawings
Fig. 1 is a structural diagram of a SIP service cluster system according to the present invention.
FIG. 2 is a structural view of LB composition.
Fig. 3 is a flowchart of a method for implementing an SIP service cluster according to the present invention.
Fig. 4 is a flowchart illustrating the detailed steps of step one in fig. 3.
Fig. 5 is a flowchart illustrating the third step of fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.
As shown in fig. 1, the SIP service trunking system of the present invention includes an SIP load balancer (LB for short) and a plurality of SIP service servers, wherein:
LB, when receiving the SIP message from the external user terminal, extracting the IP address and port of the user terminal sending the message from the source address and port of the IP packet bearing the SIP message, and selecting a SIP service server for the SIP message: judging whether the SIP message is an initial request message, if so, selecting an SIP service server according to a set load balancing algorithm, and if not, selecting a corresponding SIP service server according to fields or parameters carried in the SIP message; then, directly packaging the SIP message into a new IP packet, and setting the source address and the port of the IP packet as the IP address and the port of the user terminal; finally, the IP packet is sent to the selected SIP service server; in order to increase the processing performance of the LB, the LB does not reassemble the SIP message, but directly packages and forwards the SIP message as a whole to the selected SIP service server;
before sending the SIP message to the user terminal, the SIP service server carries the external SIP service address and port data in the field or parameter of the SIP message to be sent, then encapsulates the SIP message into a new IP packet, sets the source address and port of the IP packet as the address and port of LB external SIP service, and finally sends the IP packet;
and the data backup server is used for backing up the session key data sent by the SIP service server.
As shown in fig. 2, the LB may further include:
the SIP analyzing device is used for receiving an SIP message sent by an external user terminal, judging whether the SIP message is an initial request message according To a starting line, a CALL-ID field and a To field in the SIP message, if so, forwarding the SIP message To the primary load balancing device, and if not, forwarding the SIP message To the primary session holding device;
the first-level load balancing device is used for hashing the CALL-ID value in the SIP message forwarded by the SIP analyzing device, then selecting a corresponding SIP service server according to the hashing result, and notifying the message packaging device of the SIP message and the selected SIP service server;
the first-level session holding device is used for judging whether the CALL-ID value in the SIP message forwarded by the SIP analyzing device contains the SIP service address and the port data of the SIP service server or not, if so, the contained SIP service server is extracted from the CALL-ID value, the SIP message and the extracted SIP service server are notified to the reliability processing device, and if not, the SIP message is forwarded to the second-level session holding device;
the second-level session holding device is used for judging whether a tag parameter value in the SIP message forwarded by the first-level session holding device contains the SIP service address and port data of the SIP service server, if so, the contained SIP service server is extracted from the SIP message, then the SIP message and the extracted SIP service server are notified to the reliability processing device, and if not, the SIP message is forwarded to the third-level session holding device;
the third-level session holding device is used for searching the session record table according to the CALL-ID value in the SIP message, extracting the SIP service server corresponding to the CALL-ID value, and then informing the reliability processing device of the SIP message and the extracted SIP service server;
the reliability processing device is used for carrying out availability detection on the received SIP service server and judging whether the SIP service server is in an available state or not, if so, the reliability processing device informs the received SIP message and the SIP service server to the message packaging device, and if not, the reliability processing device informs the SIP message to the secondary load balancing device;
the second-level load balancing device is used for selecting one SIP service server with low message rate from the SIP service servers according to the message rates of all the SIP service servers, and then notifying the message packaging device of the SIP message and the selected SIP service server;
and the message packaging device is used for directly packaging the received SIP message into a new IP packet, setting the source address and the port of the IP packet into the IP address and the port of the user terminal extracted from the source address and the port of the IP packet carrying the SIP message, then sending the IP packet to the selected SIP service server, and simultaneously recording and counting the message rate of the SIP service server.
In the invention, the SIP service server directly sends the SIP message to the user terminal, but simultaneously ensures that the subsequent message sent to the SIP service server by the user terminal still continues to pass through the LB, and simultaneously, by backing up the data of the SIP service server, when a certain SIP service server fails, other SIP service servers can take over the failed SIP service server to continue processing the service, thereby further ensuring that the system has higher performance and reliability. The SIP service server may further include:
the SIP message sending device is used for judging whether the SIP message sent to the user terminal is an initial request message, if so, carrying the external SIP service address and port data in the CALL-ID value of the SIP message to be sent, and if not, carrying the external SIP service address and port data in the tag parameter value of the SIP message to be sent; then, packaging the SIP message to be sent into a new IP packet, and setting the source address and the port of the IP packet as the address and the port of LB for providing SIP service to the outside; finally, sending IP packet to corresponding user terminal;
and the data backup device is used for collecting the key data of the session and then sending the data to the data backup server when the session is monitored to be established.
When the SIP service server A has a fault, LB selects the SIP service server B to take over the SIP service server A and continue to process the service: and the SIP service server B acquires the session key data of the SIP service server A from the data backup server, and then continues to process the service of the SIP service server A so as to enhance the reliability of the whole cluster system. The data backup technology can adopt the technology commonly used in the industry (such as shared storage, distributed storage and cache servers, etc.).
As shown in fig. 3, the method for implementing an SIP service cluster of the present invention includes an SIP load balancer (LB for short) and a plurality of SIP service servers, where when the LB receives an SIP message sent from an external user terminal, the method includes:
step one, LB extracts an IP address and a port of a user terminal that sends a SIP message from a source address and a port of an IP packet that carries the SIP message, and determines whether the SIP message is an initial request message? If yes, selecting an SIP service server according to a set load balancing algorithm, and continuing the next step; if not, the SIP message is a subsequent message of the existing session, a corresponding SIP service server is selected according to the field or the parameter carried in the SIP message, and then the next step is continued;
step two, LB encapsulates SIP message into a new IP packet directly, and sets the source address and port of IP packet as the IP address and port of user terminal, then sends the IP packet to the selected SIP service server; in order to increase the processing performance of the LB, the LB does not reassemble the SIP message, but directly packages and forwards the SIP message as a whole to the selected SIP service server;
and step three, before the SIP service server sends the SIP message to the user terminal, carrying the external SIP service address and port data in the field or parameter of the SIP message to be sent, then encapsulating the SIP message into a new IP packet, setting the source address and port of the IP packet as the address and port of LB external SIP service, and finally sending the IP packet to the user terminal.
As shown in fig. 4, the first step may further include:
and step 18, LB directly encapsulates the SIP message into a new IP packet, sets the source address and port of the IP packet as the IP address and port of the user terminal, then sends the IP packet to the selected SIP service server, and records and counts the message rate of the SIP service server.
The SIP service server in the invention directly sends the SIP message to the user terminal without LB after receiving and processing the SIP message sent by LB. In order to enable the LB to receive all subsequent SIP messages and satisfy the session maintenance policy of the LB and the high reliability of the entire system, as shown in fig. 5, step three may further include:
In order to further ensure the high performance and reliability of the invention, the invention can also backup the data of the SIP service server, when a certain SIP service server fails, other SIP service servers can take over the failed SIP service server to continue processing the service. The invention may also include:
when the SIP service server monitors that a session is established, the SIP service server collects session key data and then sends the data to the data backup server.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A SIP service cluster system is characterized in that the system comprises a SIP load balancer and a plurality of SIP service servers, the SIP load balancer is called LB for short, wherein:
LB, when receiving the SIP message from the external user terminal, extracting the IP address and port of the user terminal sending the message from the source address and port of the IP packet bearing the SIP message, and selecting a SIP service server for the SIP message: judging whether the SIP message is an initial request message, if so, selecting an SIP service server according to a set load balancing algorithm, and if not, selecting a corresponding SIP service server according to fields or parameters carried in the SIP message; then, directly packaging the SIP message into a new IP packet, and setting the source address and the port of the IP packet as the IP address and the port of the user terminal; finally, the IP packet is sent to the selected SIP service server;
before sending SIP message to user terminal, SIP service server carries its own external SIP service address and port data in the field or parameter of SIP message to be sent, then encapsulates SIP message into a new IP packet, sets the source address and port of IP packet as LB external address and port providing SIP service, and finally sends IP packet.
2. The system of claim 1, wherein the LB further comprises:
the SIP analyzing device is used for receiving an SIP message sent by an external user terminal, judging whether the SIP message is an initial request message according To a starting line, a CALL-ID field and a To field in the SIP message, if so, forwarding the SIP message To the primary load balancing device, and if not, forwarding the SIP message To the primary session holding device;
the first-level load balancing device is used for hashing the CALL-ID value in the SIP message forwarded by the SIP analyzing device, then selecting a corresponding SIP service server according to the hashing result, and notifying the message packaging device of the SIP message and the selected SIP service server;
the first-level session holding device is used for judging whether the CALL-ID value in the SIP message forwarded by the SIP analyzing device contains the SIP service address and the port data of the SIP service server or not, if so, the contained SIP service server is extracted from the CALL-ID value, the SIP message and the extracted SIP service server are notified to the reliability processing device, and if not, the SIP message is forwarded to the second-level session holding device;
the second-level session holding device is used for judging whether a tag parameter value in the SIP message forwarded by the first-level session holding device contains the SIP service address and port data of the SIP service server, if so, the contained SIP service server is extracted from the SIP message, then the SIP message and the extracted SIP service server are notified to the reliability processing device, and if not, the SIP message is forwarded to the third-level session holding device;
the third-level session holding device is used for searching the session record table according to the CALL-ID value in the SIP message, extracting the SIP service server corresponding to the CALL-ID value, and then informing the reliability processing device of the SIP message and the extracted SIP service server;
the reliability processing device is used for carrying out availability detection on the received SIP service server and judging whether the SIP service server is in an available state or not, if so, the reliability processing device informs the received SIP message and the SIP service server to the message packaging device, and if not, the reliability processing device informs the SIP message to the secondary load balancing device;
the second-level load balancing device is used for selecting one SIP service server with low message rate from the SIP service servers according to the message rates of all the SIP service servers, and then notifying the message packaging device of the SIP message and the selected SIP service server;
and the message packaging device is used for directly packaging the received SIP message into a new IP packet, setting the source address and the port of the IP packet into the IP address and the port of the user terminal extracted from the source address and the port of the IP packet carrying the SIP message, then sending the IP packet to the selected SIP service server, and simultaneously recording and counting the message rate of the SIP service server.
3. The system of claim 1, wherein the SIP service server further comprises:
the SIP message sending device is used for judging whether the SIP message sent to the user terminal is an initial request message, if so, carrying the external SIP service address and port data in the CALL-ID value of the SIP message to be sent, and if not, carrying the external SIP service address and port data in the tag parameter value of the SIP message to be sent; then, packaging the SIP message to be sent into a new IP packet, and setting the source address and the port of the IP packet as the address and the port of LB for providing SIP service to the outside; and finally, sending the IP packet to the corresponding user terminal.
4. The system of claim 1, further comprising a data backup server for backing up session key data transmitted from the SIP service server,
the SIP service server further comprises:
and the data backup device collects the key data of the session when monitoring that the session is established, and then sends the data to the data backup server.
5. A realization method of SIP service cluster is characterized in that the realization method comprises an SIP load balancer and a plurality of SIP service servers, the SIP load balancer is called LB for short, when the LB receives an SIP message sent by an external user terminal, the realization method comprises the following steps:
step one, LB extracts IP address and port of user terminal sending message from source address and port of IP packet bearing SIP message, and judges whether SIP message is initial request message, if yes, selects a SIP service server according to set load balancing algorithm, then continues the next step; if not, selecting a corresponding SIP service server according to the field or the parameter carried in the SIP message, and continuing the next step;
step two, LB encapsulates SIP message into a new IP packet directly, and sets the source address and port of IP packet as the IP address and port of user terminal, then sends the IP packet to the selected SIP service server;
and step three, before the SIP service server sends the SIP message to the user terminal, carrying the external SIP service address and port data in the field or parameter of the SIP message to be sent, then encapsulating the SIP message into a new IP packet, setting the source address and port of the IP packet as the address and port of LB external SIP service, and finally sending the IP packet to the user terminal.
6. The method of claim 5, wherein step one further comprises:
step 11, LB extracts the IP address and port of the user terminal sending the message from the source address and port of the IP packet bearing SIP message, then judges whether the SIP message is an initial request message according To the starting line, CALL-ID field and To field in the SIP message, if yes, continues the next step; if not, continue step 13;
step 12, LB hashes the CALL-ID value in SIP message, then selects the corresponding SIP service server according to the hash result, and turns to step 18;
step 13, LB judges whether the CALL-ID value in SIP message contains SIP service address and port data of SIP service server, if yes, extracts the contained SIP service server from it, then turns to step 16; if not, continuing the next step;
step 14, LB determines whether the tag parameter value in the SIP message contains the SIP service address and port data of the SIP service server, if yes, extracts the contained SIP service server from it, and then goes to step 16; if not, continuing the next step;
step 15, LB searches the session record list according to the CALL-ID value in the SIP message, and extracts the SIP service server corresponding to the CALL-ID;
step 16, the LB performs availability detection on the extracted SIP service server, determines whether the extracted SIP service server is in an available state, and if so, the extracted SIP service server is the SIP service server selected by the LB, and goes to step 18; if not, continuing the next step;
step 17, LB according to all SIP business server message rate, choose a small SIP business server from them;
and step 18, LB directly encapsulates the SIP message into a new IP packet, sets the source address and port of the IP packet as the IP address and port of the user terminal, then sends the IP packet to the selected SIP service server, and records and counts the message rate of the SIP service server.
7. The method of claim 5, wherein step three further comprises:
step 31, the SIP service server judges whether the SIP message sent to the user terminal is an initial request message, if so, the external SIP service address and port data are carried in the CALL-ID value of the SIP message to be sent, and then the next step is continued; if not, carrying the external SIP service address and port data in the tag parameter value of the SIP message to be sent, and continuing the next step;
step 32, the SIP service server encapsulates the SIP message to be sent into a new IP packet, sets the source address and port of the IP packet as the address and port of LB providing SIP service to the outside, and then sends the IP packet to the corresponding user terminal.
8. The method of claim 5, further comprising: when the SIP service server monitors that a session is established, the SIP service server collects session key data and then sends the data to the data backup server.
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| CN106686085A (en) * | 2016-12-29 | 2017-05-17 | 华为技术有限公司 | Load balancing method, apparatus and system |
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| CN111614738A (en) * | 2020-05-07 | 2020-09-01 | 北京金山云网络技术有限公司 | Service access method, device, equipment and storage medium based on Kubernetes cluster |
| CN111614738B (en) * | 2020-05-07 | 2022-05-10 | 北京金山云网络技术有限公司 | Service access method, device, equipment and storage medium based on Kubernetes cluster |
| WO2022127625A1 (en) * | 2020-12-14 | 2022-06-23 | 中兴通讯股份有限公司 | Sip network element multi-address learning method and apparatus, and signaling monitoring system |
| CN114979006A (en) * | 2021-10-14 | 2022-08-30 | 中移互联网有限公司 | SIP message processing method and system |
| CN114979006B (en) * | 2021-10-14 | 2023-09-05 | 中移互联网有限公司 | Session Initiation Protocol (SIP) message processing method and system |
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