WO2009074094A1 - A method and apparatus for processing the break of the connection based on the charging and transmitting protocol - Google Patents

Abstract

A method and apparatus for processing the break of the connection based on the charging and transmitting protocol. The method includes that: determining whether the first Diameter relay and the server or the client are reachable to each other; if the first Diameter relay and the server or the client are unreachable to each other, sending a notification message to the neighboring nodes of the first Diameter relay, the notification message includes that the first Diameter relay and the server or the client are unreachable to each other, so as to notify the neighboring nodes that they would no longer send the message to the server or the clientthrough the first Diameter relay. The technical scheme provided by the embodiments of the invention avoids the phenomena of sending a great deal of message repeatedly in the network during the time that the Diameter relay and the server or the client are unreachable to each other, and saves the transmitting resource of the network.

Description

 Method and device for processing connection interruption based on charging transmission protocol The present application claims to be filed in December 4, 2007 by the Patent Office of B, the application number is 200710178734.9, and the invention is entitled "connection interruption processing method and device based on charging transmission protocol" The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

 The present invention relates to the field of network communication technologies, and in particular, to a connection interruption processing method and apparatus based on a charging transmission protocol. Background of the invention

 The Diameter protocol (Billing and Transfer Protocol) is widely used in the IP Multimedia Subsystem (IMS) field, for example, it is applied to the Rf interface for offline charging, to the Ro interface for online charging, and to the application.

Interrogating-Call Session Control Function/Serving-Call Session Control Function (query call 4 session control function/service call session control function, I-CSCF/S-CSCF) and Home Subscriber Server (HSS) Sh interface, etc.

 On a network that includes the Diameter protocol, you can use the direct connection networking mode or the node non-direct connection networking mode. A typical network structure using a node indirectly connected networking mode is shown in FIG.

 In Figure 1, the access device is connected to the home Diameter server through a Diameter relay. The connection between the access device and the Diameter relay, and between the Diameter relay and the home Diameter server are Diameter connections. Only one home Diameter server and one Diameter relay are shown in FIG. 1. In fact, the access device can be connected to multiple home Diameter servers through a Diameter relay, and the access device can also be connected to multiple Diameter relays. . The Diameter relay in Figure 1 can be either a Diameter relay agent or a Proxy agent relay.

 The following takes FIG. 2 as an example to describe a Diameter-based connection interruption processing method in the current non-direct connection networking mode. In Figure 2, the access device is connected to the home Diameter server 1 and the home Diameter server 2 through Diameter relay. The access device sends a request message to the home Diameter server 1. After receiving the request message of the access device, the Diameter relay finds that the connection between the access device and the home Diameter server 1 is broken, and the Diameter relay returns a response message to the access device. , Result-Code carried in the response message Attribute Value Pair (AVP) is set to

 DIAMETER— UNABLE—TO—DELIVE to indicate that the Diameter relay cannot forward the request message. After the access device determines that the request message cannot be forwarded according to the received response message, and cannot send the request message to the home Diameter server 1 through other Diameter relays, the access device continuously sends a request message to the Diameter relay to try Through the connection between the Diameter relay and the Diameter server 1, until the connection between the Diameter relay and the home Diameter server 1 is restored, the Diameter relay transmits a request message to the Diameter server 1, thereby ensuring reliable transmission of the Diameter application message.

 In the course of research and practice of the prior art, the inventors have found that at least the following problems exist in the prior art:

Before the connection between the Diameter relay and the home Diameter server 1 is restored, the request message and the response message are continuously transmitted between the access device and the Diameter relay, thereby occupying a large amount between the access device and the Diameter relay. IP bandwidth, The information interaction between the access device and other network devices is seriously affected. For example, in FIG. 2, the information exchange between the Diameter towel and the home Diameter server 2 is seriously affected. Similarly, there are similar issues before the connection between the Diameter relay and the client is restored. Summary of the invention

 The embodiment of the invention provides a connection interruption processing method and device based on the charging transmission protocol Diameter, which avoids the phenomenon that a large number of repeated messages are sent in the network during the period when the Diameter relay and the server or the client are unreachable, thereby saving network transmission resources.

 A Diameter-based connection interruption processing method provided by an embodiment of the present invention includes:

 Determining whether the first Diameter relay is reachable to the server or the client;

 Sending, to the neighboring node of the first Diameter relay, notification information, where the first Diameter relay is unreachable between the server and the client, the notification information including the first Diameter relay and the server Or unreachable information between the clients, to notify the neighboring node that the message is no longer sent to the server or client by using the first Diameter relay.

 The Diameter-based connection interruption processing device provided by the embodiment of the present invention is located in a Diameter relay device, and the device includes:

 The unreachable detection module is configured to determine whether the Diameter relay and the server or the client are reachable, if

If the Diameter relay is unreachable between the server or the client, the sending module is triggered;

 a sending module, configured to send notification information to the neighboring node of the Diameter relay according to the trigger of the unreachable detection module, where the notification information includes that the Diameter relay is unreachable between the server or the client, to notify The neighboring node no longer sends a message to the server or client through the Diameter relay.

 The Diameter-based connection interruption processing device provided by the embodiment of the present invention includes:

 a receiving module, configured to receive a message;

 a judging module, configured to: when it is determined that the message received by the receiving module is not including the notification information between the first Diameter relay and the server or the client, prohibiting, by the first Diameter relay, from the server or the client Send a message.

 The access device provided by the embodiment of the present invention is connected to the server through a Diameter relay, and the access device includes: a receiving module, configured to receive a message;

 The determining module is configured to: when it is determined that the message received by the receiving module includes the unreachable notification information between the first Diameter relay and the server, prohibit sending the message to the server by using the first Diameter relay.

 The server provided by the embodiment of the present invention is connected to the client through a Diameter relay, and the server includes:

 a receiving module, configured to receive a message;

 The determining module is configured to: when it is determined that the message received by the receiving module includes the notification information that is unreachable between the first Diameter relay and the client, prohibit sending the message to the client by using the first Diameter relay.

 The Diameter relay device provided by the embodiment of the present invention includes:

 The unreachable detection module is configured to determine whether the Diameter relay is reachable between the server and the client, and if the Diameter relay does not reach the server or the client, the sending module is triggered;

a sending module, configured to send, according to a trigger of the unreachable detection module, a notification information to the neighboring node of the Diameter relay, where The notification information includes that the Diameter relay is unreachable between the server or the client, to notify the neighboring node that the message is no longer sent to the server or the client by using the Diameter relay;

 a receiving module, configured to receive a message;

 The determining module is configured to, after determining that the message received by the receiving module includes the notification information that is not reachable between the predetermined Diameter relay and the server or the client, prohibit sending the message to the server or the client by using the predetermined Diameter relay .

 Through the description of the technical solution, it can be known that by obtaining the connection information between the Diameter relay and the server or the client, the link state of each connection between the Diameter relay and the server or the client can be obtained, and each connection is utilized. The link state can determine whether the Diameter relay is unreachable between the server and the client. After the unreachable occurs, the neighboring node does not pass the Diameter relay by sending a notification message to the neighboring node of the Diameter relay. The above server or client sends a message, thereby avoiding a large number of repeated transmissions of messages in the network during the period of the Diameter relay server or the client being unreachable, thereby saving network transmission resources. BRIEF DESCRIPTION OF THE DRAWINGS

 1 is a schematic diagram of a typical network structure of a node indirectly connected network in the prior art;

 2 is a schematic diagram of a prior art Diameter-based connection interruption processing method;

 3 is a schematic diagram of a connection interruption processing method in application scenario 1 of the embodiment of the present invention;

 4 is a schematic diagram of a connection interruption processing method in application scenario 2 of the embodiment of the present invention;

 5 is a schematic diagram of a connection interruption processing method in application scenario 3 of the embodiment of the present invention;

 6 is a schematic diagram of a connection interruption processing method of an application scenario W according to an embodiment of the present invention;

 7 is a schematic diagram of a connection interruption processing method in application scenario 5 of an embodiment of the present invention;

 FIG. 8 is a schematic diagram of a Diameter-based connection interruption processing apparatus according to an embodiment of the present invention. Mode for carrying out the invention

 In the method embodiment of the present invention, it is first required to determine whether the first Diameter relay is reachable to the server, and whether it is reachable or not, that is, whether it is unreachable, for example, according to the obtained first Diameter relay and the server. The connection information is used to determine whether the first Diameter relay is unreachable between the server and the server. The first Diameter relay here does not specifically refer to a Diameter relay in the network, and the first Diameter relay may be any Diameter relay in the network. The name of the first Diameter relay is used for convenience, clarity, and the like. The server here is the Diameter server to which the first Diameter relay belongs. The operation of obtaining the connection information between the first Diameter relay and the server may be performed by the first Diameter relay. Of course, embodiments of the present invention also do not preclude the possibility of performing an acquisition operation by other network devices.

 In the method embodiment of the present invention, the connection between the first Diameter relay and the server may be: a direct connection between the first Diameter relay and the server, or may be: a non-first between the first Diameter relay and the server direct connection. Indirect connection example For example, the first Diameter relay is connected to the server through other Diameter relays, that is, a multi-level Diameter relay connection. Moreover, there may be one connection between the first Diameter relay and the server, or multiple connections.

In the case that there is only one connection between a Diameter relay in the network and a server, the first Diameter is obtained. The first specific example of the connection information with the server is: detecting the failure of the link directly connected between the first Diameter relay and the server; the second specific example is: receiving other Diameter relays The transmitted fault information indicating that the Diameter relay transmitting the fault information is unreachable between the server; the third specific example is: detecting a chain between the first Diameter relay and other directly connected Diameter relays The road has failed.

 In the case where one or more connections between a Diameter relay in the network and a server are obtained, the first is obtained.

A specific example of the connection information between the Diameter relay and the server is: detecting the failure of the link directly connected between the first Diameter relay and the server, and acquiring other information between the first Diameter relay and the server. Linked link state information; another specific example is: receiving fault information transmitted by other Diameter relays, and acquiring link state information of other connections between the first Diameter relay and the server, where the fault information indication The Diameter relay that sends the fault information is unreachable between the server; other specific examples are: detecting the failure of the link between the other Diameter relays directly connected to the first Diameter relay, and acquiring the first Diameter relay Link status information for other connections to the server.

 The foregoing embodiments of the present invention can detect the link fault by using multiple existing detection methods. For example, the first Diameter relay can detect the original link fault detection mechanism. Embodiments of the present invention do not limit the specific implementation process for detecting link failure.

 After obtaining the connection information, it is determined whether the first Diameter relay and the server are unreachable according to the obtained connection information, where the unreachable refers to: all connections between the first Diameter relay and the server are: The message transmission cannot be performed, that is, the communication between the first Diameter relay and the server is interrupted. For example, there are multiple connections between the first Diameter relay and the server, and the multiple connections may include: direct connection, and/or indirect connection; if one of the multiple connections has a link failure, and other connections If there is no fault in the link, there is no unreachability between the first Diameter relay and the server; if the link of the multiple connections fails, the first Diameter relay is unreachable between the server and the server. The foregoing determining whether the first Diameter relay and the server are unreachable may be performed by the first Diameter relay. Of course, the embodiment of the present invention does not exclude the possibility that the other network device performs the unreachable judgment operation. .

After determining that the first Diameter relay is unreachable between the server and the server, the notification information is sent to the neighboring node of the first Diameter relay. The embodiment of the present invention may send the notification information according to the routing information of the first Diameter relay. The notification information includes information that is unreachable between the first Diameter relay and the server, to notify the neighboring node that the message is no longer sent to the server or the client by using the first Diameter relay. The neighboring node of the first Diameter relay may learn from the received notification information that the first Diameter relay is unreachable between the server and the server, and the neighboring node no longer sends a message to the server through the first Diameter relay. The neighboring node here may be: an access device, or may be: a Diameter relay directly connected to the first Diameter relay, and may also be: each server connected to the first Diameter relay. When the neighboring node is the access device, the access device not knows that the first Diameter relay is unreachable between the server and the server, and then no longer sends a request message to the first Diameter relay, that is, the request and the unreachable server are no longer attempted. Therefore, the first Diameter relay does not need to send a response message to the access device, thereby avoiding a large amount of repeated message transmission between the access device and the first Diameter relay. When the neighboring node is a Diameter relay, the Diameter relay can modify the link state information of the connection with the server according to the notification information after receiving the notification information, and the Diameter relay PJ that receives the notification information adopts the "h" The operation performed after the first Diameter relay receives the failure information, that is, the Diameter relay that receives the notification information becomes the first Diameter relay described in the above embodiment. In addition, when adjacent When the node is a Diameter towel, the Diameter towel can no longer send a request message through the first Diameter relay after receiving the request message of the access device. When the neighboring node is a server, the server can discard the received notification information.

 - The operation of transmitting the notification information may be performed by the first Diameter relay. Of course, the embodiment of the present invention does not exclude the possibility of performing the above-described operation of transmitting the notification information by other network devices.

 The foregoing notification information may include: first Diameter relay information, unreachable server information (that is, unreachable host information), and information that is unreachable between the first Diameter relay information and the server. Of course, in addition to the foregoing information, the notification information may further include: information that the first Diameter relays to the unreachable server in the domain, or the first Diameter relays to other reachable servers in the domain where the unreachable server is located. Information and information about whether other servers are reachable.

 When the notification information is sent to the neighboring node of the first Diameter relay, the broadcast transmission method may be adopted. Of course, other transmission methods such as unicast may also be adopted. When the broadcast transmission mode is adopted, in order to avoid the loopback of the notification information, the broadcast loopback prevention mechanism can be adopted. The embodiments of the present invention may adopt various existing broadcast loopback prevention mechanisms, for example, increasing the number of transmissions in the notification information. When the notification information is sent once, the number of transmissions is decremented, and when the number of transmissions is decremented to a predetermined number of times, the notification information is stopped. For example, the neighboring node that receives the notification information does not return the notification information along the receiving path; further, the notification information is no longer relayed to the source Diameter that issued the notification information, and the like. The embodiments of the present invention do not limit the implementation process of preventing the broadcast loopback mechanism.

 After detecting that the first Diameter relay and the server are changed from unreachable to reachable, sending the recovery notification information to the neighboring node of the first Diameter relay to notify the neighboring node of the reachability between the first Diameter relay and the server. .

 The specific implementation process of detecting the unreachable transition between the first Diameter relay and the server is basically similar to the implementation process of detecting the unreachable. For example, there is only one connection between a Diameter relay in the network and a server. In the case that the link failure recovery of the direct connection between the first Diameter relay and the server is detected, it is determined that the first Diameter relay and the server are changed from unreachable to reachable; for example, in the network When one or more connections exist between a Diameter relay and a server, after receiving the fault recovery information transmitted by other Diameter relays, it is determined that there is no other connection between the first Diameter relay and the server. If there are other connections but the link status of other connections is unreachable, it is determined that the unreachable between the first Diameter relay and the server is changed to reachable. Similarly, fault recovery can be detected in a variety of ways. The specific implementation process will not be described in detail herein.

 After determining that the first Diameter relay and the server are changed from unreachable to reachable, the specific implementation process of sending the recovery notification information to the neighboring node of the first Diameter relay is similar to the specific implementation process of sending the notification information. . It will not be described in detail here.

 The neighboring node of the first Diameter relay may learn from the received recovery notification information that the first Diameter relay and the server are changed from unreachable to reachable, and then the neighboring node may relay through the first Diameter. Send a message to the above server. Similarly, the adjacent node herein may be: an access device, or may be: a Diameter relay directly connected to the first Diameter relay, and may also be: each server connected to the first Diameter relay. The foregoing recovery notification information may include: a first Diameter relay information, a server information that is changed from unreachable to reachable (that is, unreachable host information), and information that is reachable between the first Diameter relay information and the server.

In the embodiment of the present invention, the recovery notification information is sent to the adjacent node of the first Diameter relay by using the broadcast transmission mode, and the broadcast loopback prevention mechanism may also be adopted. The implementation process is similar to the specific implementation process of sending the notification information described above, and is not here. More details.

 The embodiment of the wood invention method will be further described below with reference to the accompanying drawings.

 FIG. 3 is a schematic diagram of a connection interruption processing method in an application scenario of a single Diameter relay.

 Figure 3 includes: access device C (belonging to the example.net domain), Diameter relay R (belonging to the r.exapmle.net domain), S1 server (belonging to the example.org domain), and S2 server (belonging to the example.org domain) And the S3 server (belonging to the example.com domain). The S1 server, S2 server, and S3 server are all Diameter servers. The access device C is connected to the S1 server, the S2 server, and the S3 server through the Diameter relay R, and the Diameter relay R provides the relay agent service for the access device C.

 The Diameter relay R peer (Peer) data information is shown in Table 1. The peer data information here is the information of the adjacent nodes of the Diameter relay R.

 Table 1

As can be seen from Table 1, the Diameter relay R has W neighboring nodes, which are: S1 server, S2 server, S3 server, and access device C.

 The local route information of the Diameter relay R is shown in Table 2.

 Table 2

When the Diameter relay R detects that the link directly connected to the Diameter server S1 is interrupted, the local maintenance service is refreshed. Server status information. At the same time, the Diameter towel broadcasts a message to the neighboring node access device C, the S2 server, and the S3 server, that is, broadcasts the notification information. The information included in the broadcast message is shown in Table 3.

 table 3

Table 3, the broadcast agent information is Diameter towel followed by R information; since the broadcast message is issued by Diameter towel R, the source broadcast agent information is Diameter relay R information; the destination domain information is the domain information of the server S1, Since the link connecting the Diameter relay R and the server S2 is not interrupted, the Diameter relay R is reachable to the destination domain; the host information is the server S1 information; the Diameter relay R to the server S1 is unreachable.

 It should be noted that the destination domain information may not be included in the table 3, that is, the "destination domain" field is an optional parameter, and the "host" field may carry N host information at the same time, so that the neighboring node Diameter can be notified through the broadcast message. The reachable or unreachable state of the relay R and N hosts.

 The broadcast message advertises the neighboring nodes that received the broadcast message: The connection between the Diameter relay R and the server S1 is interrupted, that is, unreachable, but the Diameter relay R and example.org are still reachable.

 Diameter relay R broadcasts messages according to the information in Table 1 and Table 2. After receiving the broadcast message, the access device C refreshes the locally maintained server state information according to the "diameter relay R to server S1 unreachable" information in the broadcast message; then, stops sending the service message to the server S1, but can communicate with the server. Service message transmission between S2. After receiving the broadcast message, the server S2 has no interworking relationship with the server S1. Therefore, after receiving the broadcast message, the server S2 can directly discard the broadcast message. Similarly, server S3 can also discard it directly after receiving a broadcast message.

 FIG. 4 is a schematic diagram of a connection interruption processing method according to an embodiment of the present invention in an application scenario of multiple Diameter relay interconnections. Figure 4 includes: access device C (belonging to cexample.net domain), Diameter relay R1 (belonging to r.exapmle.net domain),

Diameter relay R2 (belonging to the r.exapmle.org domain), SI server (belonging to the example.org domain), S2 server (belonging to the example.org domain), and S3 server (belonging to the example.com domain). The S1 server, S2 server, and S3 server are all Diameter servers. The access device C is connected to the S1 server, the S2 server, and the S3 server through the Diameter relay R1 and the Diameter relay. The Diameter relay R1 and the Diameter relay R2 provide the relay service for the access device C.

When the Diameter relay R2 detects that the link directly connected to the S1 server is interrupted, the Diameter relay R2 sends a broadcast message to the neighboring node, that is, the peer Diameter relay R1, the S2 server, and the S3 server, and the broadcast message includes information such as Table 4 shows. Table 4

In Table 4, the broadcast agent information is Diameter relay R2 information; since the broadcast message is issued by the Diameter relay R2, the source broadcast agent information is the information of the Diameter relay R2; the destination domain information is the domain information of the server S1. The link between the Diameter towel and the server S2 is not broken. Therefore, the Diameter towel is reachable to the destination domain after R2; the host information is the server S1 information; and the Diameter relay R2 to the server S1 is unreachable.

 After receiving the broadcast message, the server S2 has no interworking relationship with the server S1. Therefore, after receiving the broadcast message, the server S2 can directly discard the broadcast message. Similarly, server S3 can also discard it directly after receiving a broadcast message.

 After receiving the broadcast message, the Diameter relay R1 refreshes the locally maintained server state information according to the "diameter relay R2 to server S1 unreachable" information in the broadcast message; meanwhile, it is determined whether the message transmission can be performed with the server S1 through other connections. If there are other connections that can transmit messages with the server S1, the Diameter relay R1 can no longer transmit the broadcast message; if there is no other connection to transmit the message with the server S1, the Diameter relay R1 continues to send a broadcast to its neighboring nodes. Message. Since the broadcast loopback prevention mechanism is adopted, the Diameter relay R1 can only transmit a broadcast message to the access device C, and no longer send a broadcast message to the Diameter relay R2.

 The information included in the broadcast message sent by the Diameter relay R1 to the access device C is shown in Table 5.

 table 5

In Table 5, the broadcast agent information is Diameter relay R1 information; since the broadcast message is issued by the Diameter relay R2, the source broadcast agent information is Diameter relay R2 information; the destination domain information is the domain information of the server S1, Since the link connecting the Diameter relay R1 and the server S2 is not interrupted, the Diameter relay R1 is reachable to the destination domain; Server SI information; Diameter towel is not reachable after R1 to server SI.

 After receiving the broadcast message shown in Table 5, the access device C refreshes the locally maintained server state information according to the "diameter relay R1 to server S1 unreachable" information in the broadcast message; and then stops sending the service message to the server S1. However, service message transmission can be performed with the server S2.

 FIG. 5 is a schematic diagram of a connection interruption processing method according to an embodiment of the present invention in an application scenario of multiple Diameter relay interconnections. The network entity included in FIG. 5 is the same as the network entity included in FIG.

 When the Diameter relay R1 detects that the link directly connected to the Diameter relay R2 is interrupted, the Diameter relay R1 sends a broadcast message to the neighboring node, that is, the peer access device C, according to the local routing information, and the information included in the broadcast message is as follows. Table 6 shows.

 Table 6

In Table 6, the broadcast agent information is Diameter relay R1 information; since the broadcast message is issued by Diameter relay R1, the source broadcast agent information is Diameter relay R1 information; the destination domain information is server S1, server S2, and The domain information of the server S3 is disconnected. The link between the Diameter relay R1 and the Diameter relay R2 is interrupted. Therefore, the Diameter relay R1 to the destination domain is unreachable. The host information can be empty. Of course, the host information can also be empty. That is, the host information may be the server S1, the server S2, and the server S3 information; if the host information is not empty, the Diameter relay R1 to the server S1, the server S2, and the server S3 are unreachable.

 After receiving the broadcast message shown in Table 6, the access device C refreshes the locally maintained server state information according to the information of the "diameter relay R1 to the destination domain is unreachable" in the broadcast message; and then stops to the server S1 and the server. S2 and server S3 send a service message.

 When the Diameter relay R2 detects that the link directly connected to the Diameter relay R1 is interrupted, the Diameter relay R2 can also send a broadcast message to the neighboring nodes, that is, the peer server S1, the server S2, and the server S3 according to the local routing information, and broadcast. The information included in the message is shown in Table 7.

Table 7 Broadcast message information broadcast agent r.example.org source broadcast agent r.example.org destination domain example.net state unreachable host NULL state NULL In Table 7, the broadcast agent information is Diameter relay R2 information; since the broadcast message is Diameter relay R2 is issued, therefore, the source broadcast proxy information is Diameter relay R2 information; the destination domain information is the domain information of the Diameter relay R1, and the link connecting the Diameter relay R1 and the Diameter relay R2 is interrupted, therefore, The Diameter relay R2 to the destination domain is unreachable; the host information can be empty.

 After receiving the broadcast message shown in Table 7, the server S1, the server S2, and the server S3 refresh the state information of the locally maintained access device C according to the information of the "diameter relay R2 to the destination domain is unreachable" in the broadcast message; Then, the message transmission with the access device C is stopped.

 FIG. 6 is a schematic diagram of a connection interruption processing method according to an embodiment of the present invention in an application scenario in which multiple Diameter relay agents are interconnected. Figure 6 includes: access device C (belonging to the example.net domain) and Diameter relay R1 (belonging to the rl.exapmle.net domain),

Diameter relay R2 (belonging to r2.exapmle.org domain), Diameter relay R3 (belonging to r3.exapmle.org domain) and B S1 month server (belonging to example.org domain). The S1 server is a Diameter server. There are two connections between the access device C and the S1 server. That is, the access device C is connected to the SI server through the Diameter relay R1 and the Diameter relay R2, and the access device C also relays the R3 SI through the Diameter relay R1 and Diameter. The server connection, that is, the Diameter Relay R2 and the Diameter Relay R3 provide redundant services for the S1 server in the example.org domain. Diameter relay Rl, Diameter relay R2 and Diameter relay R3 provides relay service for access device C.

 When the Diameter relay R2 detects that the link directly connected to the S1 server is interrupted, the Diameter relay R2 sends a broadcast message to the neighboring node, that is, the peer Diameter relay R1, according to the local routing information, and the information included in the broadcast message is as shown in Table 8. Shown.

 Table 8

Table 8, the broadcast agent information is Diameter towel followed by R2 information; since the broadcast message is issued by the Diameter towel following R2, the source broadcast agent information is Diameter relay R2 information; the destination domain information is the domain information of the server S1, Since the link connecting the Diameter relay R2 and the S1 server is interrupted, the Diameter relay R2 to the destination domain is unreachable; the host information is the S1 server information; the Diameter relay R2 to the server S1 is unreachable.

 After receiving the broadcast message shown in Table 8, the Diameter relay R1 refreshes the locally maintained server state information according to the information of the "diameter relay R2 to the destination domain is unreachable" in the broadcast message; since the Diameter relay R1 can also pass The Diameter relay R3 performs message transmission with the S1 server, and therefore, the Diameter relay R1 terminates the transmission of the broadcast message. Thereafter, the Diameter relay R1 receives the message sent by the access device C, and then transmits the message through the Diameter relay R3 and the S1 server S1.

 FIG. 7 is a schematic diagram of a connection interruption processing method according to an embodiment of the present invention in an application scenario of multiple Diameter relay loop interconnections. Figure 7 includes: access device C (belonging to the example.net domain) and Diameter relay R1 (belonging to the rl.exapmle.net domain),

Diameter relay R2 (belonging to the r2.exapmle.org domain), Diameter relay R3 (belonging to r3.exapmle.org ± or), SI server (belonging to the example.org domain) and S2 server (belonging to the example.org domain). The S1 server and the S2 server are Diameter servers. There are two connections between the access device C and the S1 server, that is, the access device C is connected to the SI server through the Diameter relay R1 and the Diameter relay R2, and the access device C also relays the R3 through the Diameter relay R1 and the Diameter relay R3. The Diameter relay R2 is connected to the SI server, that is, the Diameter relay R2 and the Diameter relay R3 provide redundant services for the S1 server in the example.org domain. Diameter relay Rl, Diameter relay R2 and Diameter relay R3 provides relay service for access device C.

 The following mainly introduces the implementation of the broadcast loop prevention mechanism in the application scenario shown in Figure 7.

 When the Diameter relay R2 detects that the link directly connected to the S1 server is interrupted, the Diameter relay R2 sends a broadcast message to the neighboring node, that is, the peer Diameter relay R1, according to the local routing information, and the information included in the broadcast message is as shown in Table 9. Shown.

 Table 9

In Table 9, the broadcast agent information is Diameter relay R2 information; since the broadcast message is issued by Diameter relay R2, the source broadcast agent information is Diameter relay R2 information; the destination domain information is domain information of the server S1, Because the link connecting the Diameter relay R2 and the SI server is interrupted, the Diameter relay R2 to the destination domain is unreachable; the host information can be empty.

After receiving the broadcast message shown in Table 9, the Diameter relay R1 relays R2 to the destination domain according to the broadcast message. The unreachable information refreshes the locally maintained server status information. Because the Diameter towel needs to pass the Diameter relay R2 after the other path connected to the S1 server, the Diameter relay R1 and the S1 server are unreachable. In this way, the Diameter relay R1 continues to send a broadcast message to its neighboring node, that is, the peer access R3 (Diameter relay R2 is the source Diameter relay that issues the broadcast message, therefore, Diameter The relay R1 no longer sends a broadcast message to the Diameter relay R2, thereby effectively avoiding the broadcast loopback.

 Diameter relay R1 sends the broadcast agent information in the received broadcast message to its own information. Diameter Relay The broadcast message sent by R1 includes the information shown in Table 10.

 Table 10

In Table 10, the broadcast agent information is Diameter relay R1 information; since the broadcast message is issued by the Diameter relay R2, the source broadcast agent information is Diameter relay R2 information; the destination domain information is the domain information of the server S1, Since the link connecting the Diameter relay R2 and the S1 server is interrupted, the Diameter relay R2 to the destination domain is unreachable; the host information can be empty.

 After receiving the broadcast message, the Diameter relay R3 refreshes the locally maintained server state information according to the information of the "diameter relay R2 to the destination domain unreachable" in the broadcast message; since the Diameter relay R3 needs to pass the Diameter relay R2 and S 1 The server is connected, and the Diameter relay R2 is unreachable to the destination domain. Therefore, the Diameter relay R3 and the S1 server are unreachable and cannot transmit messages. Thus, the Diameter relay R3 intends to send a broadcast message to its neighboring nodes, the peer Diameter relay R2 and the Diameter relay R1, since the Diameter relay R2 is the source Diameter relay that issues the broadcast message, and the Diameter relay R1 is the forwarder. The Diameter relay of the broadcast message, therefore, the Diameter relay R3 no longer sends a broadcast message to the Diameter relay R2, the Diameter relay R1, thereby effectively avoiding the broadcast loopback.

 It can be seen that the broadcast loopback prevention mechanism can be: The broadcast message is not sent to the broadcast agent in the broadcast message and the source broadcast agent.

 The broadcast loopback prevention mechanism can also be implemented by the following HopCounter counting method.

 The optional field HopCounter is added to the broadcast message sent by the Diameter relay. When the broadcast message broadcasts one path for each transmission, the HopCounter count is decremented by 1. When the HopCounter count is 0, the current Diameter node no longer broadcasts the message, thereby preventing the broadcast ring. road. The mechanism needs to configure the HopCounter value according to different actual networking conditions.

For example, in the application scenario shown in FIG. 7, the HopCounter value of the Diameter relay R2 is set to 2, in the Diameter. After R2 sends a broadcast message, the HopCounter value is decremented by 1, and the HopCounter value after the decrease of 1 is carried in the broadcast message towel. The broadcast message sent by the Diameter relay R2 contains the information shown in Table 11.

 Table 11

After receiving the broadcast message, the Diameter relay R1 determines that the HopCounter>0 in the broadcast message determines that the broadcast message can continue to be sent, and the Diameter relay R1 sends a broadcast to the neighboring node, that is, the peer access device C and the Diameter relay R3. Message, and decrement the HopCounter value in the broadcast message. Diameter Relay The broadcast message sent by R1 contains the information shown in Table 12.

 Table 12

After receiving the broadcast message, the Diameter relay R3 determines that the HopCounter=0 in the broadcast message, and determines that the broadcast message cannot be continuously sent. The Diameter relay R3 no longer sends a broadcast message to its neighboring node, that is, the peer. Thereby loopback transmission of broadcast messages is prevented.

In the description of each embodiment, after the unreachable transition shown in each figure is reachable, the recovery notification information may be sent, and the resume notification information may still be sent in the form of a j 'cast message in each table. , just "unreachable" in j' broadcast message becomes "reachable". Each neighboring node that receives the broadcast message, such as an access device, a server, or the like, refreshes the locally maintained server state information or the client state information according to the received broadcast message. The service can be transmitted between the access device and the server by using the interrupted recovery connection. As can be seen from the description of the foregoing technical solution, by obtaining the connection information between the Diameter relay and the server, the link state of each connection between the Diameter relay and the server can be obtained, and the Diameter relay can be determined by using the link state of each connection. Whether the unreachable relationship occurs with the server; after the unreachable occurs, the neighboring node does not send the broadcast message to the server through the Diameter relay by sending the notification information to the neighboring node of the Diameter relay, thereby avoiding the Diameter in the Diameter During the period when the server is unreachable, a large number of repeated transmissions of messages between the access device and the Diameter relay, such as effectively reducing the amount of message transmission between the access device and the Diameter relay, and saving network transmission resources.

 It should be noted that, in the description of the foregoing specific embodiments, the first Diameter relay and the server are taken as an example, and the technical solution described above is also applicable to the first Diameter relay and the client, which is simple. For the purpose, the Diameter-based connection interruption processing technical solution between the first Diameter relay and the client is no longer repeated.

 Next, a Diameter-based connection interruption processing device in a Diameter relay device according to an embodiment of the present invention will be described. It should be noted that, in the following description, the connection interruption between the Diameter relay and the server is still taken as an example, and the technical content described below is also applicable to the processing of the connection interruption between the Diameter relay and the client.

 The Diameter-based connection interruption processing device is as shown in Fig. 8. The device in Fig. 8 includes an unreachable detection module and a transmission module. The Diameter-based connection interruption processing device may also optionally include: a recovery detection module.

 The unreachable detection module is configured to obtain connection information between the Diameter relay and the server, and trigger the sending module after determining that the Diameter relay and the server are unreachable according to the connection information. The Diameter relay where the unreachable detection module is located is the first Diameter relay described in the above method implementation. The connection between the Diameter relay and the server may be in multiple ways, and the connection manner may make the connection information have different meanings, as described in the foregoing method embodiments. The unreachable detection module can detect by using various existing detection methods - the link failure is not detailed here.

 The unreachable detection module may include: a storage submodule and a detection submodule.

 The storage submodule is used to store link state information of each connection between the Diameter relay and the server. A link link status information can indicate whether the connection between the Diameter relay and the server is reachable.

 The detecting sub-module is configured to detect that the link directly connected between the Diameter relay and the server is interrupted, or to detect that the Diameter relay receives the notification information sent by other Diameter relays, or detects that the Diameter is located. After the connection between the relay and other Diameter relays is interrupted, it is determined whether the Diameter relay is unreachable between the server and the server according to the link state information stored in the storage submodule. After determining that the relay is unreachable, the sending module is triggered. For example, after detecting the failure information of the link directly connected between the Diameter relay and the server, the detection sub-module determines the link state information of other connections between the Diameter relay and the server. Whether to trigger the sending module; for example: after detecting that the Diameter relay receives the fault information from other Diameter relay transmissions, according to the link state information of other connections between the Diameter relay and the server To decide whether to trigger the sending module. After the detection sub-module determines that all the connections between the Diameter relay and the server are unable to transmit the message, it determines to trigger the sending module. All connections between the Diameter relay and the server can include: direct connections, and/or indirect connections. The detection sub-module can also refresh the link state information stored in the storage sub-module according to the detected result.

The sending module is configured to send, according to the trigger of the unreachable detection module, a notification message to the neighboring node of the Diameter relay in which the Diameter relay is located, to notify the neighboring node of the Diameter relay that the Diameter relay is not reachable between the server and the server, so that the neighboring node No longer pass this The Diameter towel in which the sending module is located sends a message to the server. The sending module can send the notification information according to the routing information of the Diameter towel. Specifically, the description in the method embodiment is described.

 The recovery detection module is configured to notify the sending module to send the recovery notification information to the neighboring node after detecting that the Diameter relay and the server are changed from unreachable to reachable. The specific implementation process of the recovery detection module notifying the sending module to send the recovery notification information, and the specific implementation process of the sending module sending the recovery notification information are as described in the implementation method of the method. The recovery detection module may further refresh the link state information stored in the Diameter relay according to the detected result, for example, refresh the link state information stored in the storage submodule.

 Another Diameter-based connection interruption processing apparatus provided by the embodiment of the present invention is described below. The apparatus herein may be located in a Diameter relay device, or may be located in an access device, or may be located in a server. The device includes a receiving module and a judging module.

 After receiving the notification information, if the determining module knows from the notification information that the Diameter relay transmitting the notification information is unreachable, the determining module prohibits the device in which it is located from relaying to the Diameter relaying the notification information. The server sends a message, that is, the neighboring node that receives the notification information no longer sends a message to the server through the Diameter relay that sends the notification information. The adjacent node here may be: an access device, or a Diameter relay directly connected to a Diameter relay that sends notification information, and may also be: each server connected to the Diameter relay that sends the notification information. When the neighboring node is an access device, the access device does not send a request message to the Diameter relay that sends the notification information, because the access device learns that the Diameter relay that sends the notification information is unreachable, that is, the request message is no longer attempted. - The connection of the unreachable server, therefore, the Diameter relay transmitting the notification information does not need to send a response message to the access device, thereby avoiding a large amount of repetition between the access device and the Diameter relay transmitting the notification information. Message transmission. When the neighboring node is a Diameter relay, the Diameter relay can modify the link state information connected to the server according to the notification information after receiving the notification information, and the Diameter relay that receives the notification information can be sent by using the “h” relay. The operation performed by the Diameter relay of the notification information after receiving the failure information. In addition, when the neighboring node is a Diameter relay, the Diameter relay may not send the request message through the Diameter relay that sends the notification information after receiving the request message of the access device. When the neighboring node is a server, the server can discard the received notification information.

 The access device provided by the embodiment of the present invention is described below. The access device includes: a receiving module and a determining module. After receiving the notification information, if the determining module knows from the notification information that the Diameter relay transmitting the notification information is unreachable, the determining module prohibits the device in which it is located from relaying to the Diameter relaying the notification information. The server sends a message, that is, the access device that receives the notification information no longer sends a message to the server through the Diameter relay that sends the notification information. Since the access device learns that the Diameter relay that sends the notification information is unreachable between the server and the server, the request message is no longer sent to the Diameter relay that sends the notification information, that is, the request and the connection to the unreachable server are no longer attempted. Therefore, the Diameter relay that sends the notification information does not need to send a response message to the access device, thereby avoiding a large amount of repeated message transmission between the access device and the Diameter relay that sends the notification information.

 The server provided by the embodiment of the present invention will be described below. The server includes: a receiving module and a judging module.

After receiving the notification information, if the determining module learns from the notification information that the Diameter relay transmitting the notification information is unreachable between the client and the client, the determining module prohibits the server in which the server is located from relaying the Diameter relay by sending the notification information. ―h described the client sending a message, that is, the server receiving the notification information no longer relays the Diameter relay by sending the notification information to the above The client sends a message. The server can discard the notification information received by the receiving module.

 A Diameter relay device provided by the embodiment of the wood invention will be described below.

 The Diameter relay device includes: an unreachable detection module, a transmission module, a receiving module, and a judging module. The Diameter relay device can also optionally include: a recovery detection module.

 The unreachable detection module is configured to obtain connection information between the Diameter relay and the server, and trigger the sending module after determining that the Diameter relay and the server are unreachable according to the connection information. The Diameter relay where the unreachable detection module is located is the first Diameter relay described in the above method implementation. The connection between the Diameter relay and the server may be in a plurality of manners, and the difference in the connection manner may make the connection information have different meanings, as described in the method embodiment.

 - h The unreachable detection module may include: a storage submodule and a detection submodule. The operations performed by the storage sub-module and the detection sub-module are as described in the above embodiments.

 The sending module is configured to send, according to the trigger of the unreachable detection module, a notification message to the neighboring node of the Diameter relay in which the Diameter relay is located, to notify the neighboring node of the Diameter relay that the Diameter relay is not reachable between the server and the server, so that the neighboring node The message is no longer sent to the server through the Diameter relay where the sending module is located. The sending module can send the notification information according to the routing information of the Diameter relay.

 The recovery detection module is configured to notify the sending module to send the recovery notification information to the neighboring node after detecting that the Diameter relay and the server are changed from unreachable to reachable. The specific implementation process of the recovery detection module notifying the sending module to send the recovery notification information, and the specific implementation process of the sending module sending the recovery notification information are as described in the implementation method of the method. The recovery detection module may further refresh the link state information stored in the Diameter relay according to the detected result, for example, refresh the link state information stored in the storage submodule.

 After receiving the notification information, if the determining module learns from the notification information that the Diameter relay transmitting the notification information is unreachable between the server, the determining module prohibits the Diameter relay in which the module is located from relaying the Diameter relay by sending the notification information. The message is sent to the above server, that is, the Diameter relay receiving the notification information no longer sends a message to the server through the Diameter relay that sent the notification information.

 While the invention has been described by the embodiments of the invention, it will be understood that

Claims

Rights request

A method for processing a connection towel based on a charging transmission protocol Diameter, comprising:

 Determining whether the first Diameter relay is reachable to the server or the client;

 Sending, to the neighboring node of the first Diameter relay, notification information, where the first Diameter relay is unreachable between the server and the client, the notification information including the first Diameter relay and the server Or unreachable information between the clients, to notify the neighboring node that the message is no longer sent to the server or client by using the first Diameter relay.

The method according to claim 1, wherein the determining whether the first Diameter relay is reachable to the server or the client is specifically:

 After detecting that the link directly connected between the first Diameter relay and the server or the client is interrupted, acquiring link state information of the first Diameter relay and other connections of the server or the client, according to the Determining, by the first Diameter, link state information of the other connection with the server or the client, determining whether the first Diameter relay is reachable to the server or the client.

 The method according to claim 1, wherein the determining whether the first Diameter relay is reachable to the server or the client is specifically:

 Receiving failure information that is sent from another Diameter relay and being unreachable between the server or the client, acquiring the first

Diameter relaying link state information of other connections with the server or client, and according to the received fault information, and link state information of the first Diameter relay and other connections of the server or client And determining whether the first Diameter relay is reachable to the server or the client.

 The method according to claim 1, wherein the determining whether the first Diameter relay is reachable to the server or the client is specifically:

 After detecting that the link of the first Diameter relay and the other Diameter relay connection is interrupted, acquiring link state information of the first Diameter relay and other connections of the server or the client, according to the The first Diameter relays link state information of the other connection with the server or the client, and determines whether the first Diameter relay is reachable to the server or the client.

 The method according to any one of claims 1 to 4, wherein the step of transmitting the notification information to the adjacent node of the first Diameter relay comprises:

 The notification information is sent to the neighboring node of the first Diameter relay by using a broadcast method and a broadcast loopback prevention mechanism.

6. The method according to claim 5, wherein the broadcast prevention loopback mechanism comprises at least one of: limiting a number of notification information transmissions, limiting transmission of notification information to a source node of the broadcast notification information, and limiting notification to the notification The forwarding node of the information sends the notification information.

The method according to any one of claims 1 to 4, wherein the method further comprises: after detecting that the first Diameter relay server or the client is changed from unreachable to reachable , to the first Diameter The succeeding neighbor node sends recovery notification information to notify the neighboring node that the first Diameter towel is reachable to the server or client.

 8. A Diameter-based connection interruption processing device, located in a Diameter relay device, wherein the device comprises:

 The unreachable detection module is configured to determine whether the Diameter relay and the server or the client are reachable, if

If the Diameter relay is unreachable between the server or the client, the sending module is triggered;

 a sending module, configured to send notification information to the neighboring node of the Diameter relay according to the trigger of the unreachable detection module, where the notification information includes that the Diameter relay is unreachable between the server or the client, to notify The neighboring node no longer sends a message to the server or client through the Diameter relay.

 9. The device of claim 8, wherein the unreachable detection module comprises:

 a storage submodule, configured to store link state information of a connection between the Diameter relay and the server or the client; the detecting submodule, configured to detect a direct connection between the Diameter relay and the server or the client If the link is interrupted, or the notification information sent by the other Diameter relay is detected, or the connection between the Diameter relay and the other Diameter relay is interrupted, according to the storage submodule The stored link state information determines whether the Diameter relay is reachable to the server or the client, and after determining that the reachability is unreachable, triggering the sending module.

 The device according to claim 8 or 9, wherein the device further comprises:

 The recovery detection module is configured to notify the sending module to send the recovery notification information to the neighboring node after detecting that the Diameter relay is reachable between the server and the client.

 11. A Diameter-based connection interruption processing device, wherein the device comprises:

 a receiving module, configured to receive a message;

 a determining module, configured to: after determining that the message received by the receiving module includes the notification information that is unreachable between the first Diameter relay and the server or the client, prohibiting, by using the first Diameter relay, to the server or the client Send a message.

 An access device, where the access device is connected to the server through a Diameter relay, and the access device includes:

 a receiving module, configured to receive a message;

 The determining module is configured to: when it is determined that the message received by the receiving module includes the unreachable notification information between the first Diameter relay and the server, prohibit sending the message to the server by using the first Diameter relay.

 13. A server, wherein the server is connected to a client by using a Diameter relay, and the server includes:

 a receiving module, configured to receive a message;

 The determining module is configured to: when it is determined that the message received by the receiving module includes the notification information that is unreachable between the first Diameter relay and the client, prohibit sending the message to the client by using the first Diameter relay.

 14. A Diameter relay device, comprising:

The unreachable detection module is configured to determine whether the Diameter relay and the server/client are reachable, if the Diameter If the relay is unreachable between the server and the client, the sending module is triggered;

 a sending module, configured to send notification information to the neighboring node of the Diameter relay according to the trigger of the unreachable detection module, where the notification information includes that the Diameter relay is unreachable between the server or the client, to notify The neighboring node no longer sends a message to the server or client through the Diameter relay;

 a receiving module, configured to receive a message;

 The determining module is configured to, after determining that the message received by the receiving module includes the notification information that is not reachable between the predetermined Diameter relay and the server or the client, prohibit sending the message to the server or the client by using the predetermined Diameter relay .