CN102546712A - Message transmission method, equipment and system based on distributed service network - Google Patents

Abstract

The invention discloses a message transmission method, device and system based on a distributed service network. The method includes: an access agent receives a message from a SIP terminal, and sends the message to a service node in the distributed service network. In the embodiment of the present invention, in the process of the SIP terminal accessing the distributed service network, by using the access proxy instead of the SIP terminal to perform the relevant message forwarding process, the process of sending the message by the SIP terminal is saved, and the resource utilization rate of the SIP terminal is low. , the control process is simple, and the network maintenance cost is small.

Description

A message transmission method, device and system based on a distributed service network

technical field

The present invention relates to the technical field of communication, in particular to a message transmission method, device and system based on a distributed service network.

Background technique

The SIP (Session Initiation Protocol, Session Initiation Protocol) proxy server is used to route SIP requests to UAS (User Agent Server, User Agent Server), and route SIP responses to UAC (User Agent Client, User Agent Client). Among them, the SIP proxy server routes a session invitation according to the current location of the called party, and at the same time performs call authentication, billing and other more important functions; the important task of the SIP proxy server is to route the session invitation to the called party, and the session invitation usually passes through Go through a group of agents until the current location of the called party is found.

There are two types of SIP proxy servers: state-independent and state-dependent. State-independent proxy servers are simple message forwarders. Although messages are usually arranged in transactions, state-independent proxy servers do not care about transactions. When receiving a request, the state-related proxy server needs to create a state and keep the state until the transaction is completed; for some transactions (such as the transaction created by INVITET), it needs to be kept for a long time until the called off-hook or hang-up .

The schematic diagram of the centralized SIP network architecture is shown in Figure 1. The traditional SIP network system structure adopts a centralized C/S control mode. The SIP terminal obtains the address of the SIP proxy through the redirection server and the location server, and sends the request to the SIP proxy server.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

SIP terminals in a traditional network need a single point of access, and there are defects such as single point of failure, low resource utilization, complex control, and high network maintenance costs.

Contents of the invention

Embodiments of the present invention provide a message transmission method, device and system based on a distributed service network, so as to improve the experience of using a SIP terminal.

In order to achieve the above purpose, an embodiment of the present invention provides a message transmission method based on a distributed service network, including:

The access proxy receives messages from SIP terminals and sends the messages to service nodes in the distributed service network.

An embodiment of the present invention provides a message transmission device based on a distributed service network, including:

A receiving module, configured to receive a message from a SIP terminal;

A sending module, configured to send the message to service nodes in the distributed service network.

An embodiment of the present invention provides a message transmission system based on a distributed service network, including:

An access proxy, configured to receive a message from a SIP terminal, and send the message to a service node in the distributed service network;

A service node is configured to receive messages from the access agent.

Compared with the prior art, the present invention has at least the following advantages:

In the process of SIP terminal accessing the distributed service network, by using the access proxy instead of the SIP terminal to perform the relevant message forwarding process, the process of sending the message by the SIP terminal is saved, the utilization rate of the SIP terminal resource is low, the control process is simple, and The network maintenance cost is small.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic diagram of a centralized SIP network architecture in the prior art;

FIG. 2 is a schematic diagram of a DSN network architecture in Embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of an access agent in Embodiment 1 of the present invention;

FIG. 4 is a schematic flowchart of a message transmission method based on a distributed service network provided by Embodiment 2 of the present invention;

FIG. 5 is a schematic flowchart of a message transmission method based on a distributed service network provided by Embodiment 3 of the present invention;

FIG. 6 is a schematic flowchart of a message transmission method based on a distributed service network provided in Embodiment 4 of the present invention;

FIG. 7 is a schematic flowchart of a message transmission method based on a distributed service network provided in Embodiment 5 of the present invention;

FIG. 8 is a schematic flow chart of a message transmission method based on a distributed service network provided in Embodiment 6 of the present invention;

FIG. 9 is a schematic flowchart of a message transmission method based on a distributed service network provided by Embodiment 7 of the present invention;

FIG. 10 is a schematic structural diagram of a message transmission device based on a distributed service network provided by Embodiment 9 of the present invention.

Detailed ways

In order to support the centralized core network, the implementation of existing SIP terminals requires the introduction of a SIP proxy server into the network architecture for the multi-node access mechanism of DSN (Distributed Service Network, distributed service network) and the dynamic switching mechanism of service nodes to help SIP terminals Complete DSN access. But the existing SIP proxy server only maintains the state when the SIP transaction is interacted (the beginning and the end of the session), rather than maintaining the state in the whole call. Therefore, the existing SIP proxy server cannot meet the needs of DSN access, and it has the following disadvantages: (1) does not support the multi-access node mechanism in the DSN network; The process of redirecting the message to the service node; (3) In the same registration period, after the service node (the SN that sends the related business to the service server) goes down, the DSN can provide a new service node to serve the SIP end user, but the traditional SIP The terminal does not support switching of service nodes. In view of the above problems, embodiments of the present invention provide a message transmission method, device and system based on a distributed service network, so as to support SIP terminals to access the distributed service network.

The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Distributed Service Network (DSN for short) is a new generation of operable and manageable distributed core network system and functional architecture proposed for telecom services and mobile Internet services. DSN implements various functions of the traditional telecom core network in a P2P manner, and at the same time provides new network capabilities such as continuous service provision capability, adaptive load balancing capability, distributed storage capability, and dynamic resource scheduling capability, as shown in Figure 2 Schematic diagram of DSN network architecture. Based on the DSN network architecture, the embodiment of the present invention introduces an access agent, which can be implemented in a B2BUA (Back-to-Back User Agent, back-to-back user agent) manner, maintains the state during the entire call process, and supports SIP The terminal accesses the DSN, and shields the network changes for the SIP terminal, so as to improve the user experience. The method provided by the embodiment of the present invention can cooperate with the DSN to realize continuous service capability and self-adaptive load balancing capability, and simultaneously support multi-node access, call message redirection, and message redirection functions during the call process.

In the DSN network architecture, the SN of the core control layer can be an access node or a service node. The access node is used to receive related messages from the access agent, and the service node is used to send related services to the service server.

Embodiment 1 of the present invention provides an access agent, as shown in FIG. 3 , which is a schematic structural diagram of the access agent. The access agent includes:

The SIP protocol access module is used for receiving and sending SIP messages.

The SIP message distribution module is used to submit the received SIP message to the relevant upper layer processing module, and according to the logic of the upper layer processing module, send the message to be sent to the SIP protocol access module to send out.

Session control (which can be implemented by a session control module) is used to process all session-related request messages and response messages (such as INVITE, BYE, 1xx, 2xx, etc.).

The registration process (which can be implemented by the registration process module) is used to process all registration-related requests and response messages (such as REGISTER, etc.).

Service node location (can be implemented by a service node location module), used to send a request to the DSN to locate the address of the user's current service node.

The terminal-service mapping function library is used to manage the mapping relationship between the SIP terminal and the current service node.

The session state storage function library is used to manage the state information of all SIP access nodes currently processing sessions.

The access node management function library is used to manage all accessible node addresses provided by the DSN network.

Embodiment two

Based on the above-mentioned DSN network architecture and access agent, Embodiment 2 of the present invention provides a message transmission method based on a distributed service network, as shown in FIG. 4 , the method includes the following steps:

In step 401, the access agent receives a message from a SIP terminal.

Step 402, the access agent sends the message to the service node in the distributed service network.

In the embodiment of the present invention, the message includes the Register message in the registration process; this step includes: the access agent selects the access node from the access node list, and sends the Register message to the access node; the access agent receives the message from the access node. The 302 redirection message of the ingress node carries the address information of the service node in the 302 redirection message; the access proxy sends the Register message to the service node according to the address information of the service node.

This message includes the Register message in the registration process; this step includes: the access agent selects the first access node from the access node list, and sends the Register message to the first access node; when the first access node fails (for example, failures such as downtime), the access agent selects the second access node from the access node list, and sends the Register message to the second access node; the access agent receives the 302 from the second access node Redirect message, 302 The redirect message carries the address information of the service node; the access agent sends the Register message to the service node according to the address information of the service node.

The message includes the INVITE message when the call is set up; this step includes: the access proxy sends the INVITE message to the primary service node according to the primary service node information recorded by itself; the access proxy receives the 302 redirection message from the primary service node, and the 302 repeats The directed message carries the address information of the backup service node selected by the main service node according to the load balancing strategy; the access agent sends the INVITE message to the backup service node according to the address information of the backup service node.

The message includes the INVITE message when the call is set up; this step includes: the access proxy sends the INVITE message to the first service node according to the first service node information recorded by itself; when the first service node fails, the access proxy sends the INVITE message to the first service node The message is sent to the selected access node; the access agent receives the 302 redirection message from the access node, and the 302 redirection message carries the address information of the second service node; the access agent sends the address information of the second service node according to the address information of the second service node The INVITE message is sent to the second service node.

The message includes the BYE message after the call is set up; this step includes: the access proxy sends the BYE message to the first service node according to the first service node information; when the first service node fails, the access proxy constructs a Register message and sends it to The selected access node; the access agent receives the 302 redirection message from the access node, and the 302 redirection message carries the address information of the second service node; the access agent sends the BYE message according to the address information of the second service node to the second service node.

To sum up, in the embodiment of the present invention, in the process of SIP terminal accessing the distributed service network, by using the access proxy instead of the SIP terminal to perform the related message forwarding process, the process of sending the message by the SIP terminal is saved, and the SIP terminal is improved. The terminal resource utilization rate is low, the control process is simple, and the network maintenance cost is small.

In addition, in the embodiment of the present invention, the multi-access node mechanism in the DSN network is supported; the process of redirecting the registration message to the registration server through the access node in the DSN network is supported; within the same registration period, after the service node goes down, DSN can provide new servers to serve SIP terminals, and support the switch of service nodes by introducing access agents; use the heartbeat mechanism to judge the status of the current server. If the heartbeat message does not respond, it is concluded that the service node is down. Processes are processed, which can shorten the response delay of user requests caused by server downtime and improve user experience.

In the embodiment of the present invention, for a SIP terminal that does not support a DSN network, the process of the SIP terminal accessing the distributed service network can be realized through an access agent; for a SIP terminal that supports a DSN network, an access agent can be used instead of the SIP terminal to execute operation, significantly improving the low resource utilization of SIP terminals.

Embodiment Three

Based on the above-mentioned DSN network architecture and access agent, the message flow after the introduction of the access agent is described in detail below. As shown in Figure 5, for the registration process after introducing the access agent, the process includes the following steps:

Step 501, SIP A sends a Register message to the access agent.

In step 502, the access agent selects an access node from the access node list, and forwards a Register message to the access node.

In the embodiment of the present invention, the access node list is pre-maintained in the access agent, and the access agent can obtain according to a preset strategy (for example, according to a preset period; trigger acquisition when there is an access node failure; the number of access nodes Maintain 4, acquire when the number is less than 4, etc.) Acquire the information of the access node, and store the access node in the access node list. In this step, an access node may be selected from the access node list according to actual needs, and the selected access node is SN-1 as an example for illustration.

Step 503, the access node SN-1 receives the Register message, selects the main service node SN-A for SIP A, and returns the address of SN-A to the access agent through a 302 redirection message. Wherein, the address of SN-A is carried in the 302 redirection message.

Step 504, after receiving the 302 redirection message, the access agent redirects the Register message to SN-A according to the address of SN-A.

Step 505, the main service node SN-A sends 401 unauthorized to the access agent.

Step 506, after receiving the 401 response from SN-A, the access agent sends 401 unauthorized to SIP A.

Step 507, SIP A sends the Register message to the access agent.

Step 508, the access agent sends the Register message to SN-A.

Step 509, SN-A sends 200 OK to the access agent.

Step 510, the access agent sends 200 OK to SIPA.

It should be noted that, in the embodiment of the present invention, the access agent also needs to record that the primary serving node of the SIPA is SN-A.

Embodiment four

As shown in Figure 6, for the processing process of the access node downtime after the introduction of the access agent, the process includes the following steps:

Step 601, SIP A sends a Register message to the access agent.

In step 602, the access agent selects an access node from the access node list, and forwards a Register message to the access node.

In the embodiment of the present invention, the access agent can select an access node from the access node list to provide services for SIPA, and the selected access node is SN-1 as an example for illustration.

In this step, a timer (such as a SIPA timer) may also be started to wait for a response.

Step 603, because the access node SN-1 is down (that is, fails), the SIP A timer is overtime, and the access agent deletes the access node SN-1 from the access node list, and selects a new access node Node SN-2.

Step 604, the access agent sends a Register message to the access node SN-2.

Step 605, the access node SN-2 receives the Register message, and uses the P2P message to find the main responsible node SN-A of SIP A.

Step 606, the access node SN-2 sends 302 a redirection message to the access agent, which carries the address of SN-A.

Step 607, after receiving the 302 redirection message, the access agent redirects the Register message to SN-A according to the address of SN-A.

Step 608, the main service node SN-A sends 401 unauthorized to the access agent.

Step 609, after receiving the 401 response from SN-A, the access agent sends 401 unauthorized to SIP A.

Step 610, SIP A sends the Register message to the access agent.

In step 611, the access agent sends a Register message to SN-A.

Step 612, SN-A sends 200 OK to the access agent.

Step 613, the access agent sends 200 OK to SIP A.

Embodiment five

As shown in Figure 7, when the SIP terminal call is set up, the load of the calling main service node is too high, and the processing process of providing services by the backup service node includes the following steps:

Step 701, SIP A sends an INVITE message to access proxy A. After that, access proxy A sends 100trying to SIP A.

Step 702, the access agent A records the main service node found during registration, and the access agent A sends an INVITE message to SN-A according to the address information of the main service node corresponding to SIP A recorded by itself.

Step 703, SN-A selects the responsible node SN-A' (backup service node) of the current call according to the load balancing strategy, and redirects the INVITE message to SN-A' through a 302 redirection message; A 302 redirection message is sent, and the 302 redirection message carries the address information of SN-A'.

Step 704, the access proxy A receives the 302 redirection message from SN-A, forwards the INVITE message to the backup service node SN-A' according to the redirection address in the 302 redirection message, and updates the address of the primary service node . Afterwards, SN-A' sends 100trying to Access Agent A.

After SN-A' receives the INVITE message, it is processed according to the normal flow, and the follow-up message is the same as the normal INVITE flow, as shown in Figure 7, and this process will not be described in detail in the embodiment of the present invention.

Embodiment six

As shown in Figure 8, before the SIP terminal call is established, the processing process of the calling service node downtime, the process includes the following steps:

In step 801, SIPA sends an INVITE message to the access agent.

Step 802, the access agent records the primary service node found during registration, and sends an INVITE message to SN-A according to the primary service node address information recorded by itself corresponding to SIP A, and sets a timer to wait for the response of the INVITE message.

Step 803, because SN-A goes down (i.e. breaks down), the timer is overtime, the access agent clears the address of the main service node, selects the access node from the access node list again, and sends the INVITE message to the selected access node.

Step 804: After receiving the INVITE message, the access node returns the address of the current primary service node SN-A' to the access agent through a 302 redirection message.

In step 805, the access agent updates the address of the main serving node SN-A', and sends an INVITE message to SN-A'. After receiving the INVITE message, SN-A' processes it according to the normal process, and the follow-up message is the same as the normal INVITE process, as shown in Figure 8, and this process will not be described in detail in the embodiment of the present invention.

Embodiment seven

As shown in Figure 9, after the SIP terminal call is established, the processing process of the main service node downtime, the process includes the following steps:

Step 901, during the call, the service node SN-A of SIPA goes down, and SIPA hangs up at this time.

In step 902, the SIPA sends a BYE message to the access agent A.

Step 903, the access agent A forwards the BYE message to SN-A according to the address information of SN-A, and starts a timer.

Step 904, due to SN-A being down, the timer expires, the access agent A clears the address of SN-A, selects the access node from the access node list again, and constructs a Register message and sends it to the selected access node, Get the address of the current service node by request.

Step 905, after the access node receives the Register message for query, it queries to obtain the address of the current service node SN-A', and returns to the access agent A through a 302 redirection message.

Step 906, the access agent A reconstructs the BYE message and sends it to SN-A' according to the current service node address, and finally receives a 200 response, and forwards the 200 response to SIPA.

Embodiment Eight

Based on the above-mentioned embodiments, the embodiment of the present invention also provides a fault detection method based on the heartbeat mechanism. In the scheme of introducing the access agent, the heartbeat mechanism can be used to detect the current state of the server. After the access agent forwards the request message , that is, start to send heartbeat messages to the destination server of the request message, and monitor the current status of the server in real time until the request is processed. If the server is found to be down, it will enter the exception processing process. For example, after the access agent initiates a registration message to the access node, it sends a heartbeat message to monitor the status of the access node. The timeout period of the heartbeat message can be adjusted according to the current state of the network; Downtime processing follow-up process.

Embodiment nine

Based on the same inventive concept as the above method, an embodiment of the present invention also provides a distributed service network-based message transmission device (i.e. access agent), as shown in Figure 10, the device includes:

Receiving module 11, for receiving the message from SIP terminal;

The sending module 12 is configured to send the message to service nodes in the distributed service network.

The message includes a Register message in the registration process; the sending module 12 is specifically configured to select an access node from the access node list, and send the Register message to the access node; A 302 redirection message of the ingress node, the 302 redirection message carrying the address information of the service node; sending the Register message to the service node according to the address information of the service node.

The message includes a Register message in the registration process; the sending module 12 is specifically configured to select a first access node from the access node list, and send the Register message to the first access node; when When the first access node fails, select a second access node from the access node list, and send the Register message to the second access node; receive a message from the second access node A 302 redirection message of the node, the 302 redirection message carrying the address information of the service node; sending the Register message to the service node according to the address information of the service node.

The message includes an INVITE message when the call is set up; the sending module 12 is specifically configured to send the INVITE message to the primary service node according to the primary service node information recorded by itself; receive a 302 message from the primary service node Redirection message, the 302 redirection message carries the address information of the backup service node selected by the main service node according to the load balancing strategy; sends the INVITE message to the backup service node according to the address information of the backup service node service node.

The message includes an INVITE message when the call is established; the sending module 12 is specifically configured to send the INVITE message to the first service node according to the first service node information recorded by itself; when the first service node When a failure occurs, sending the INVITE message to the selected access node; receiving a 302 redirection message from the access node, the 302 redirection message carrying the address information of the second service node; according to the The address information of the second service node sends the INVITE message to the second service node.

The message includes a BYE message after the call is established; the sending module 12 is specifically configured to send the BYE message to the first service node according to the information of the first service node; when the first service node fails , constructing a Register message and sending it to the selected access node; receiving a 302 redirection message from the access node, the 302 redirection message carrying the address information of the second service node; according to the second service node’s The address information sends the BYE message to the second service node.

In the embodiment of the present invention, the device also includes:

The detection module 13 is configured to detect the current state of the service node through a heartbeat message, and the current state of the service node includes that the service node is faulty or the service node is not faulty.

Wherein, each module of the device of the present invention can be integrated into one body, or can be deployed separately. The above modules can be combined into one module, or can be further split into multiple sub-modules.

Embodiment ten

Based on the same inventive concept as the above method, an embodiment of the present invention also provides a message transmission system based on a distributed service network, including:

An access proxy, configured to receive a message from a SIP terminal, and send the message to a service node in the distributed service network;

A service node is configured to receive messages from the access agent.

In the embodiment of the present invention, the message includes a Register message in the registration process; the access agent is specifically configured to select an access node from an access node list, and send the Register message to the access node; and receive a 302 redirection message from the access node, the 302 redirection message carrying the address information of the service node; and send the Register message to the service node according to the address information of the service node node.

The message includes a Register message in the registration process; the access agent is specifically configured to select a first access node from the access node list, and send the Register message to the first access node; and When the first access node fails, select a second access node from the access node list, and send the Register message to the second access node; and receive a message from the second access node A 302 redirection message of the ingress node, the 302 redirection message carrying the address information of the service node; and sending the Register message to the service node according to the address information of the service node.

The message includes an INVITE message when the call is established; the access proxy is specifically configured to send the INVITE message to the primary service node according to the primary service node information recorded by itself; and receive the message from the primary service node 302 redirection message, the 302 redirection message carries the address information of the backup service node selected by the main service node according to the load balancing strategy; and sends the INVITE message to the backup service node according to the address information of the backup service node The backup service node described above.

The message includes an INVITE message when the call is established; the access proxy is specifically configured to send the INVITE message to the first service node according to the first service node information recorded by itself; when the first service node When a failure occurs, sending the INVITE message to the selected access node; and receiving a 302 redirection message from the access node, the 302 redirection message carrying the address information of the second service node; and according to The address information of the second service node sends the INVITE message to the second service node.

The message includes a BYE message after the call is established; the access agent is specifically configured to send the BYE message to the first service node according to the information of the first service node; when the first service node fails Constructing a Register message and sending it to the selected access node; and receiving a 302 redirection message from the access node, the 302 redirection message carrying the address information of the second service node; and according to the second service The address information of the node sends the BYE message to the second service node.

The access agent is further configured to detect the current state of the service node through a heartbeat message, and the current state of the service node includes that the service node is faulty or the service node is not faulty.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, or can be located in one or more devices different from the embodiment according to corresponding changes. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (21)

1. the method for message transmission based on distributed business network is characterized in that, comprising:

Insert the agency and receive message, and said message is sent to the service node in the distributed business network from sip terminal.

2. the method for claim 1 is characterized in that, said message comprises the Register message in the registration process; Said message is sent to the service node in the distributed business network, comprising:

Said access agency selects access node from the access node tabulation, and said Register message is sent to said access node;

Said access agency receives 302 redirect messages from said access node, the address information of having carried said service node in said 302 redirect messages;

Said access agency sends to said service node according to the address information of said service node with said Register message.

3. the method for claim 1 is characterized in that, said message comprises the Register message in the registration process; Said message is sent to the service node in the distributed business network, comprising:

Said access agency selects first access node from the access node tabulation, and said Register message is sent to said first access node;

When said first access node broke down, said access agency selected second access node from said access node tabulation, and said Register message is sent to said second access node;

Said access agency receives 302 redirect messages from said second access node, the address information of having carried said service node in said 302 redirect messages;

Said access agency sends to said service node according to the address information of said service node with said Register message.

4. the method for claim 1 is characterized in that, the INVITE when said message comprises call setup; Said message is sent to the service node in the distributed business network, comprising:

Said access agency sends to said main service node according to the main service node information of self record with said INVITE;

Said access agency receives 302 redirect messages from said main service node, has carried the backup services address of node information of said main service node according to the load balancing policy selection in said 302 redirect messages;

Said access agency sends to said backup services node according to said backup services address of node information with said INVITE.

5. the method for claim 1 is characterized in that, the INVITE when said message comprises call setup; Said message is sent to the service node in the distributed business network, comprising:

Said access agency sends to said first service node according to the first service node information of self record with said INVITE;

When said first service node broke down, said access agency sent to said INVITE the access node of selection;

Said access agency receives 302 redirect messages from said access node, the address information of having carried second service node in said 302 redirect messages;

Said access agency sends to said second service node according to the address information of said second service node with said INVITE.

6. the method for claim 1 is characterized in that, said message comprises the BYE message behind the call setup; Said message is sent to the service node in the distributed business network, comprising:

Said access agency sends to said first service node according to the first service node information with said BYE message;

When said first service node broke down, said access agency structure Register message sent to the access node of selection;

Said access agency receives 302 redirect messages from said access node, the address information of having carried second service node in said 302 redirect messages;

Said access agency sends to said second service node according to the address information of said second service node with said BYE message.

7. like each described method of claim 1-6, it is characterized in that said method also comprises:

The current state that detects said service node through heartbeat message is acted on behalf of in said access, and the current state of said service node comprises that said service node breaks down or said service node does not break down.

8. the transmission of messages equipment based on distributed business network is characterized in that, comprising:

Receiver module is used to receive the message from sip terminal;

Sending module is used for said message is sent to the service node of distributed business network.

9. equipment as claimed in claim 8 is characterized in that, said message comprises the Register message in the registration process;

Said sending module specifically is used for selecting access node from the access node tabulation, and said Register message is sent to said access node;

Reception is from 302 redirect messages of said access node, the address information of having carried said service node in said 302 redirect messages;

Address information according to said service node sends to said service node with said Register message.

10. equipment as claimed in claim 8 is characterized in that, said message comprises the Register message in the registration process;

Said sending module specifically is used for selecting first access node from the access node tabulation, and said Register message is sent to said first access node;

When said first access node breaks down, from said access node tabulation, select second access node, and said Register message is sent to said second access node;

Reception is from 302 redirect messages of said second access node, the address information of having carried said service node in said 302 redirect messages;

Address information according to said service node sends to said service node with said Register message.

11. equipment as claimed in claim 8 is characterized in that, the INVITE when said message comprises call setup;

Said sending module specifically is used for according to the main service node information of self record said INVITE being sent to said main service node;

Reception has been carried the backup services address of node information of said main service node according to the load balancing policy selection from 302 redirect messages of said main service node in said 302 redirect messages;

According to said backup services address of node information said INVITE is sent to said backup services node.

12. equipment as claimed in claim 8 is characterized in that, the INVITE when said message comprises call setup;

Said sending module specifically is used for according to the first service node information of self record said INVITE being sent to said first service node;

When said first service node breaks down, said INVITE is sent to the access node of selection;

Reception has been carried the address information of second service node from 302 redirect messages of said access node in said 302 redirect messages;

Address information according to said second service node sends to said second service node with said INVITE.

13. equipment as claimed in claim 8 is characterized in that, said message comprises the BYE message behind the call setup;

Said sending module specifically is used for according to the first service node information said BYE message being sent to said first service node;

When said first service node broke down, structure Register message sent to the access node of selection;

Reception has been carried the address information of second service node from 302 redirect messages of said access node in said 302 redirect messages;

Address information according to said second service node sends to said second service node with said BYE message.

14. like each described equipment of claim 8-13, it is characterized in that, also comprise:

Detection module is used for detecting through heartbeat message the current state of said service node, and the current state of said service node comprises that said service node breaks down or said service node does not break down.

15. the message delivery system based on distributed business network is characterized in that, comprising:

Insert the agency, be used to receive message, and said message is sent to the service node in the distributed business network from sip terminal;

Service node is used to receive the message from said access agency.

16. system as claimed in claim 15 is characterized in that, said message comprises the Register message in the registration process;

Said access agency specifically is used for selecting access node from the access node tabulation, and said Register message is sent to said access node; And reception is from 302 redirect messages of said access node, the address information of having carried said service node in said 302 redirect messages; And said Register message is sent to said service node according to the address information of said service node.

17. system as claimed in claim 15 is characterized in that, said message comprises the Register message in the registration process;

Said access agency specifically is used for selecting first access node from the access node tabulation, and said Register message is sent to said first access node; And when said first access node breaks down, from said access node tabulation, select second access node, said Register message is sent to said second access node; And reception is from 302 redirect messages of said second access node, the address information of having carried said service node in said 302 redirect messages; And said Register message is sent to said service node according to the address information of said service node.

18. system as claimed in claim 15 is characterized in that, the INVITE when said message comprises call setup;

Said access agency specifically is used for according to the main service node information of self record said INVITE being sent to said main service node; And receive 302 redirect messages from said main service node, carried the backup services address of node information of said main service node in said 302 redirect messages according to the load balancing policy selection; And said INVITE is sent to said backup services node according to said backup services address of node information.

19. system as claimed in claim 15 is characterized in that, the INVITE when said message comprises call setup;

Said access agency specifically is used for according to the first service node information of self record said INVITE being sent to said first service node; When said first service node breaks down, said INVITE is sent to the access node of selection; And reception is from 302 redirect messages of said access node, the address information of having carried second service node in said 302 redirect messages; And said INVITE is sent to said second service node according to the address information of said second service node.

20. system as claimed in claim 15 is characterized in that, said message comprises the BYE message behind the call setup;

Said access agency specifically is used for according to the first service node information said BYE message being sent to said first service node; When said first service node broke down, structure Register message sent to the access node of selection; And reception is from 302 redirect messages of said access node, the address information of having carried second service node in said 302 redirect messages; And said BYE message is sent to said second service node according to the address information of said second service node.

21. like each described system of claim 15-20, it is characterized in that,

Said access is acted on behalf of, and also is used for detecting through heartbeat message the current state of said service node, and the current state of said service node comprises that said service node breaks down or said service node does not break down.

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