CN105991468B - A kind of processing method and processing device of Diameter congestion response - Google Patents

Abstract

The present invention provides a kind of processing method and processing device of Diameter congestion response, wherein the processing method includes: that the first Diameter node receives the congestion response that errored response is carried out to the request message that Diameter source node issues, and wherein congestion response carries the identification information for generating the 2nd Diameter node of congestion response；If the 2nd Diameter node for generating congestion response is the nonneighbor node of the first Diameter node, the first Diameter node is without routing switch；If when generating adjacent node of the 2nd Diameter node of congestion response for the first Diameter node, first Diameter node obtains the number of congestion response and adjusts the transmission message ratio to the 2nd Diameter node, and routing switch to the 3rd Diameter node is carried out when the number of congestion response exceeds pre-determined threshold and transmits message, wherein the link connection priority level of the 3rd Diameter node is to preset multiple Diameter nodes using load sharing as foundation lower than the link connection priority level of the 2nd Diameter node or the 3rd Diameter node.

Description

Method and device for processing Diameter congestion response

technical field

The present invention relates to the field of signaling network and core network, in particular to a method and device for processing Diameter congestion response.

Background technique

Based on the requirement of forwarding Diameter signaling messages between LTE (Long Term Evolution) network devices, it is necessary to build a Diameter signaling network composed of Diameter nodes for sending, receiving and transferring Diameter signaling. catch. The nodes of the Diameter signaling network include a Diameter server, a Diameter client and a DRA (Diameter routing Agent, Diameter routing agent). Generally, the Diameter server provides applications and services such as authentication, authentication, and policy control, and the Diameter client passes through the signaling network. Accessing the Diameter server to use applications and services, the Diameter Routing Agent (DRA) handles and forwards Diameter messages.

With the rapid development of the mobile Internet, the business volume of the mobile communication network increases rapidly, and the Diameter signaling network used to carry the LTE network signaling is also faced with a gradually increasing signaling traffic volume. During holidays and emergencies, or when equipment or link failures occur on the Diameter signaling network, nodes (including servers, clients, and DRAs) in the Diameter signaling network may receive more signaling traffic than the equipment can handle. , resulting in internal congestion of the device. According to the requirements of the Diameter basic protocol (RFC (Request For Comments) 6733), when the Diameter node generates internal congestion, it can be used at the transport layer (using SCTP (Stream Control Transmission Protocol, Stream Control Transmission Protocol)/TCP (Transmission Control Protocol) , Transmission Control Protocol) protocol) adopts congestion control mechanism, including retransmission strategy, out-of-order caching strategy, acknowledgment strategy, flow control strategy and determining timeout strategy, etc.; it can also adopt congestion control mechanism at the application layer (using Diameter protocol), namely Send an error response message to the source node of the request message, carrying a "protocol error" cause value of 3004 congestion response DIAMETER_TOO_BUSY. Usually, Diameter nodes mainly use the application layer congestion control mechanism when the internal congestion occurs, that is, send an error response DIAMETER_TOO_BUSY to the source node. The Diameter basic protocol requires that the Diameter node should try to perform route switching when it receives the error response DIAMETER_TOO_BUSY, and send the request message to another Diameter node on the path of the destination node; usually, the Diameter node will start TOO when it receives the error response DIAMETER_TOO_BUSY BUSY timer, the message is not sent from the original route before the timer expires, and the message is reverted to the original route after the timer expires.

To sum up, according to the requirements of the Diameter basic protocol, the Diameter node will send an error response DIAMETER_TOO_BUSY to the source node when it is internally congested; all Diameter nodes that receive the error response DIAMETER_TOO_BUSY will try to send the request message to another destination node on the path. A Diameter node.

As shown in Figure 1, the Diameter signaling network consists of a Diameter source node, a Diameter destination node and four Diameter routing agents. Diameter routing agent 1 and Diameter routing agent 2 are paired primary, standby or load sharing nodes. Diameter Routing Agent 3 and Diameter Routing Agent 4 are active, standby or load sharing nodes set in pairs. Diameter Routing Agent 3 is internally congested due to high load. The Diameter source node sends a request message to Diameter routing proxy 1, and Diameter routing proxy 1 forwards the request message to Diameter routing proxy 3. Diameter Routing Agent 3 returns a congestion response DIAMETER_TOO_BUSY to Diameter Routing Agent 1 due to internal congestion. Diameter routing agent 1 receives the congestion response DIAMETER_TOO_BUSY, performs route switching, forwards the request message to Diameter routing agent 4, and finally sends it to the Diameter destination node; at the same time, Diameter routing agent 1 forwards the congestion response DIAMETER_TOO_BUSY to the Diameter source node. Diameter source node receives the congestion response DIAMETER_TOO_BUSY, thinks that Diameter routing agent 1 has internal congestion, starts the TOO BUSY timer, and sends subsequent request messages to Diameter routing agent 2. Diameter routing agent 2 still forwards the request message to the active node Diameter routing Proxy 3. Diameter Routing Agent 3 returns a congestion response DIAMETER_TOO_BUSY to Diameter Routing Agent 2 due to internal congestion. Diameter routing agent 2 receives the congestion response DIAMETER_TOO_BUSY, performs route switching, forwards the request message to Diameter routing agent 4, and finally sends it to the Diameter destination node; at the same time, Diameter routing agent 2 forwards the congestion response DIAMETER_TOO_BUSY to the Diameter source node. The Diameter source node receives the congestion response DIAMETER_TOO_BUSY, thinks that Diameter routing agent 2 also has internal congestion, and starts the TOO BUSY timer; at this time, there is no available route from the Diameter source node to the Diameter destination node, and can only wait for the timer to expire before sending the request message .

In the Diameter signaling network shown in Figure 1, only the Diameter routing agent 3 generates internal congestion, but because of the forwarding of the congestion response DIAMETER_TOO_BUSY in the network, all routing agents that receive the congestion response DIAMETER_TOO_BUSY undergo route switching, even if the adjacent The nodes are not congested, and these route switching will affect the service and increase the signaling load on other routes. In addition, the Diameter source node does not distinguish the congestion response message sent by the adjacent node or the non-adjacent node, which causes the Diameter source node to think that Diameter routing agent 1 and Diameter routing agent 2 also generate internal congestion, and start timers for all routes. The request message cannot be sent until the TOO BUSY timer expires.

The above content in Figure 1 shows the following problems: the Diameter node performs route switching when receiving the congestion response message, which may lead to a large-scale route switching of the entire Diameter signaling network, increase the signaling load of the switching route, and may cause the request message The source node cannot send the message until the TOO BUSY timer expires.

Another technical problem is that as long as the Diameter node receives a congestion response DIAMETER_TOO_BUSY, it will immediately perform route switching and start the TOO BUSY timer. Therefore, a few congested responses DIAMETER_TOO_BUSY generated by Diameter nodes accidentally or incorrectly in a short period of time will also cause other Diameter nodes to identify as internal congested nodes, causing a large number of unnecessary route switching in the Diameter signaling network, and causing the Diameter source node to The request message cannot be sent until the TOO BUSY timer expires.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a Diameter congestion response processing method and device, which realizes that no extensive route switching is performed and reduces the signaling load of the route switching.

In order to achieve the above purpose, a Diameter congestion response processing method provided by an embodiment of the present invention is applied to a Diameter routing proxy node and/or a Diameter signaling node, and the processing method includes:

The first Diameter node receives a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response;

If the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or

If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response and adjusts the ratio of sending messages to the second Diameter node , and when the number of the congestion responses exceeds the preset threshold, perform route switching to the third Diameter node to transmit the message, wherein the link connection priority of the third Diameter node is lower than the link connection priority of the second Diameter node The priority level or the third Diameter node is a plurality of Diameter nodes preset based on load sharing.

Further, when the third Diameter node is preset with multiple Diameter nodes based on load sharing, when the second Diameter node that generates a congestion response is an adjacent node of the first Diameter node , the step of adjusting the ratio of sending messages to the second Diameter node in the step of acquiring the number of the congestion responses by the first Diameter node and adjusting the ratio of sending messages to the second Diameter node includes:

If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, and when the number of the congestion responses obtained by the first Diameter node does not exceed the preset threshold of the number of the congestion responses, The first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts that the number of messages sent to the second Diameter node is smaller than the number of messages sent to the third Diameter node. The number of messages sent.

Further, when the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the second Diameter node that generates a congestion response is the first Diameter node. When the first Diameter node is an adjacent node of the Diameter node, the first Diameter node obtains the number of congestion responses and adjusts the proportion of messages sent to the second Diameter node in the step of adjusting the proportion of messages sent to the second Diameter node. Steps include:

If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, and when the number of the congestion responses obtained by the first Diameter node does not exceed the preset threshold of the number of the congestion responses, The first Diameter node transmits messages to the third Diameter node without performing route switching, and the first Diameter node reduces the number of messages sent to the second Diameter node.

Further, when the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response and adjusts the number of the congestion response to the second Diameter node. The proportion of messages sent by nodes, and when the number of congestion responses exceeds a preset threshold, the step of performing route switching to the third Diameter node to transmit messages includes:

According to the identification information of the second Diameter node in the congestion response, if the first Diameter node finds the second Diameter node in the adjacent signaling node list, the second Diameter node is the first Diameter node The adjacent nodes of the Diameter node;

After the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion responses and adjusts the ratio of sending messages to the second Diameter node, and in the When the number of the congestion responses exceeds the preset threshold, the route is switched to the third Diameter node to transmit the message and time it, wherein the adjacent signaling node list is the identifier of the adjacent node that pre-stores the first Diameter node information.

Further, when the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion responses and adjusts the sending message to the second Diameter node When the number of the congestion responses exceeds the preset threshold, after the route switching is performed to the third Diameter node to transmit the message and the timing is performed, the processing method further includes:

After the timing time reaches a preset time, the first Diameter node controls the first Diameter node to route back from the third Diameter node to the second Diameter node to transmit a message.

Further, if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the step of the first Diameter node not performing route switching includes:

According to the identification information of the second Diameter node in the congestion response, if the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the second Diameter node is the first Diameter node. A non-adjacent node of a Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is pre-stored identification information of the adjacent nodes of the first Diameter node.

Correspondingly, the present invention also provides a Diameter congestion response processing device, which is applied to a Diameter routing proxy node and/or a Diameter signaling node, and the processing device includes:

A receiving module, used for the first Diameter node to receive a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response;

Judging and processing module, for if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or

If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response and adjusts the message ratio of the second Diameter node, and When the number of the congestion responses exceeds a preset threshold, perform route switching to a third Diameter node to transmit a message, wherein the link connection priority of the third Diameter node is lower than the link connection priority of the second Diameter node Or the third Diameter node is a preset multiple Diameter nodes based on load sharing.

Further, when the third Diameter node is preset with multiple Diameter nodes based on load sharing, the judgment processing module includes:

The first judgment and adjustment submodule is used for if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts the number of messages sent to the second Diameter node Less than the number of messages sent to the third Diameter node.

Further, when the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the judgment processing module includes:

The second judging and adjusting sub-module is configured to, if the second Diameter node generating the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node reduces the number of messages sent to the second Diameter node .

Further, the judgment processing module also includes:

The first judging submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node finds the second Diameter node in the adjacent signaling node list, then the first Diameter node Two Diameter nodes are adjacent nodes of the first Diameter node;

A processing sub-module, configured to acquire the number of the congestion responses and adjust the sending to the second Diameter node after the second Diameter node is an adjacent node of the first Diameter node message ratio, and when the number of congestion responses exceeds a preset threshold, route switching is performed to the third Diameter node to deliver messages and timed, wherein the list of adjacent signaling nodes is pre-stored in the first Diameter node The identification information of the adjacent nodes.

Further, the processing device also includes:

A control rewind module, configured to control the first Diameter node to rewind the route from the third Diameter node to the second Diameter node to transmit a message after the timing time reaches a preset time.

Further, the judgment processing module includes:

The second judgment submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the The second Diameter node is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is pre-stored for the first Diameter node The identification information of the adjacent nodes.

The beneficial effects of the above-mentioned technical solutions of the present invention are as follows:

In the solution of the present invention, the first Diameter node receives the congestion response, and judges whether the second Diameter node that generates the congestion response is the adjacent node of the first Diameter node, and if it is a non-adjacent node, no route switching is performed; is an adjacent node, the first Diameter node obtains the number of congestion responses and adjusts the ratio of sending messages to the second Diameter node, and the first Diameter node performs route switching when the congestion response exceeds a preset threshold. In this way, only the routes of adjacent nodes will be switched, and no large-scale route switching will occur, and when the congestion response reaches the preset threshold, the first Diameter node will perform the switching, which also avoids the occurrence of only one or a few congestion responses. range switching, while reducing the signaling load of the switching route.

Description of drawings

Fig. 1 is the Diameter signaling network congestion scenario of the prior art;

2 is a schematic flowchart of steps of a method for processing a Diameter congestion response according to an embodiment of the present invention;

3 is a schematic diagram of judging a Diameter congestion response according to an embodiment of the present invention;

4 is a schematic structural diagram of a processing structure for generating a congestion response to a non-adjacent node according to an embodiment of the present invention;

5 is a schematic structural diagram of a processing structure for generating a congestion response to an adjacent node according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an apparatus for processing a Diameter congestion response according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

In order to provide easy reference for the more detailed description below, it should be noted that Diameter signaling is divided into two types: request message and response message. In the Diameter signaling network, the request message is routed according to the routing table of the Diameter routing proxy node, and the response message is routed according to The message delivery records recorded in the Diameter routing proxy nodes are returned the same way.

Aiming at the fact that the Diameter node in the prior art receives a small number of congestion responses whether it is accidental or erroneous, it does not distinguish the congestion response messages sent by the adjacent nodes or the non-adjacent nodes, and directly performs a large-scale route switching and starts the timer. , which will affect the service and increase the signaling load on other routes, and at the same time, the request message cannot be sent before the timer expires.

The present invention provides a Diameter congestion response processing method and device. The Diameter node that receives the congestion response distinguishes whether the Diameter node that generates the congestion response is the congestion response sent by the adjacent node or the non-adjacent node. Route switching is performed and the timer is started. If it is not an adjacent node, the route switching will not be performed and the timer will not be started. In this way, extensive routing switching is avoided, and the signaling load on the routing is reduced.

As shown in FIG. 2 , in a method for processing a Diameter congestion response according to an embodiment of the present invention, the method for processing a Diameter congestion response is applied to a Diameter routing proxy node and/or a Diameter signaling node, and the processing device includes:

Step 21, the first Diameter node receives a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response;

The first Diameter node is a node in any Diameter signaling network, which can be a Diameter source node or a node of a Diameter routing agent. Any node that can be implemented by this solution belongs to the protection scope of the present invention. Not one by one example.

The congestion response DIAMETER_TOO_BUSY refers to an error response generated after congestion, and the Diameter error response may be generated by a Diameter routing agent or by a Diameter destination node. The error response generated by the former is related to the routing state and the congestion state; the error response generated by the latter is related to the processing result of the application layer and the congestion state.

The identification information may be the host name of the Diameter node, or may be the serial number of the Diameter node, and any method of specific identification belongs to the protection scope of the present invention. The Diameter routing agent or Diameter destination node that generates an error response will fill in its own hostname in the source hostname field of the response message. The source hostname is not modified by the Diameter routing proxy during the delivery of the error response. By analyzing the source host name, adjacent nodes and non-adjacent nodes can be judged, and corresponding processing can be performed.

Step 22, if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or

Step 23, if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response and adjusts the number of the congestion responses to the second Diameter node. The ratio of sending messages, and when the number of congestion responses exceeds a preset threshold, route switching is performed to a third Diameter node to transmit messages, wherein the link connection priority of the third Diameter node is lower than that of the second Diameter node. The link connection priority or the third Diameter node is a preset multiple Diameter nodes based on load sharing.

The preset threshold is a value set by recording the number of congestion responses, avoiding the problem of immediate route switching when a congestion response DIAMETER_TOO_BUSY is received, or avoiding the occurrence of only one or a few congestion responses DIAMETER_TOO_BUSY, which may cause large For range switching, by judging whether a preset threshold is reached, the switching efficiency and accuracy can also be improved.

The preset threshold is determined by the adjustment capability of the original Diameter routing agent node.

The number of the congestion response can be implemented by a counter, a module with a counting function, or a software code with a counting function. For example, this solution is adjusted under the condition of the counter, for example, the proportion of the original load-bearing Diameter routing agent is 50% Diameter routing agent 3 and 50% Diameter routing agent 4, but Diameter routing agent 3 is congested. It is necessary to adjust the load ratio, reduce the load proportion of Diameter routing agent 3, and increase the load proportion of Diameter routing agent 4, which can reduce the Diameter routing agent 3 load, relieves temporary pressure, does not interrupt signaling transmission, and improves signaling transmission efficiency.

Wherein, when the link connection priority of the third Diameter node is lower than the link connection priority of the second Diameter node, the third Diameter node and the second Diameter node may serve as the primary and secondary nodes, wherein the The second Diameter node is used as the master node, and the third Diameter node is used as the backup node; when the third Diameter node is preset with multiple Diameter nodes based on load sharing, the third Diameter node can be used as load sharing. node.

In the above steps 21 to 23, the congestion response is received by the first Diameter node (step 21), and the second Diameter node that generates the congestion response is judged whether it is an adjacent node of the first Diameter node, and if it is a non-adjacent node, Then do not perform route switching (step 22), if it is an adjacent node, then the first Diameter node obtains the number of congestion responses and adjusts the ratio of sending messages to the second Diameter node, and when the congestion response exceeds the preset threshold, the first Diameter node The node performs route switching (step 23), so that only the routes of adjacent nodes will be switched, and no large-scale route switching will be performed, and when the congestion response reaches the preset threshold, the first Diameter node will perform switching, which also avoids having only one Or a small number of congestion responses occur and cause a wide range of switching, and at the same time reduce the signaling load of the switching route.

When the Diameter node receives the congestion response DIAMETER_TOO_BUSY, it first judges whether the Diameter node that generates the congestion response is the congestion response message sent by the adjacent node or the non-adjacent node, and the congestion response message sent by the non-adjacent node and the adjacent node are respectively adopted. Targeted processing methods, specific judgments are shown in Figure 3.

Step 31, a congestion response DIAMETER_TOO_BUSY is received.

Step 32, judging whether the node generating the congestion response DIAMETER_TOO_BUSY is an adjacent node;

Step 33: If it is a non-adjacent node, generate a congestion response process for the non-adjacent node (as shown in FIG. 4, no route switching is performed, and no timer is started).

Step 34, if it is an adjacent node, generate a congestion response process for the adjacent node (as shown in FIG. 5, perform route switching and start a timer).

Aiming that the request message cannot be sent before the TOO BUSY timer expires, in the Diameter congestion response processing method according to the embodiment of the present invention, when the third Diameter node is pre-set multiple Diameter nodes based on load sharing, step 23 The step of adjusting the proportion of messages sent to the second Diameter node includes:

Step 231, if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the preset number of the congestion response that does not exceed the number of the congestion response When the threshold is reached, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts the number of messages sent to the second Diameter node to be less than that to the third Diameter node. The number of messages sent by the Diameter node.

Through step 231, when the number of congestion responses does not exceed the preset threshold, the number of messages to be sent can be adjusted by adjusting the number of messages to be sent, so that message delivery can still be ensured, and the problem that the request message cannot be sent before the TOO BUSY timer expires is solved.

The first Diameter node judges that the congestion response DIAMETER_TOO_BUSY is generated by adjacent nodes, and first starts the TOO BUSY counter; before the counter exceeds the threshold, it can effectively control the timing of route switching and dynamically adjust the message sending ratio of each route (the messages sent by the congested route are smaller than those of the non-congested route). route sending message); after the counter exceeds the threshold, route switching is performed, and the TOO BUSY timer is started at the same time.

Specifically, for a request message that cannot be sent before the TOO BUSY timer expires, in the Diameter congestion response processing method according to another embodiment of the present invention, the link connection priority level of the third Diameter node is lower than that of the second Diameter node. When the link connection priority of the Diameter node is used, the step of adjusting the proportion of messages sent to the second Diameter node in step 23 includes:

Step 232, if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the preset number of the congestion response that does not exceed the number of the congestion response When the threshold is reached, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node reduces the number of messages sent to the second Diameter node.

When the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the messages sent to the master node (second Diameter node) may be reduced, such as the original shared message The ratio is reduced from the original 100% of the messages to 80%, and then the standby node (the message sending node of the third Diameter node) is used to cache the original 20% of the message sharing.

In order to determine that it is a congestion response message sent by an adjacent node, in the Diameter congestion response processing method according to the embodiment of the present invention, step 23 is specifically:

Step 233: According to the identification information of the second Diameter node in the congestion response, the first Diameter node finds the second Diameter node in the adjacent signaling node list, then the second Diameter node is the the adjacent nodes of the first Diameter node;

Step 234, after the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion responses and adjusts the ratio of sending messages to the second Diameter node, And when the number of the congestion response exceeds the preset threshold, the route switching is performed to the third Diameter node to transmit the message and time it, wherein the adjacent signaling node list is pre-stored adjacent to the first Diameter node. Node identification information.

The above-mentioned timing function can be implemented by a timer, a module with a timing function, or a software code with a timing function, which can be used to preset a timing length.

In order to be able to switch the switched route back to the original path, the Diameter congestion response processing method according to the embodiment of the present invention further includes:

Step 24, after the timing time reaches a preset time, the first Diameter node controls the first Diameter node to route back from the third Diameter node to the second Diameter node to transmit a message.

The above-mentioned timing function can be implemented by a timer, a module with a timing function, or a software code with a timing function, which can be used to preset a timing length. After the preset time is reached, the route is reversed to the original path to complete the entire route switching process.

The timer may also be called a TOO BUSY timer, which is used to switch back to the original route after a period of time when the route is switched.

The first Diameter node judges that the congestion response DIAMETER_TOO_BUSY is generated by a non-adjacent node, does not perform route switching, does not start the TOO BUSY timer, and the subsequent request messages are still on the original route, which can effectively avoid single-point congestion in the Diameter signaling network. The entire network is congested, and it can also effectively avoid large-scale route switching and the resulting increased signaling load of the switching route.

It is necessary to first determine whether it is a congestion response message sent by an adjacent node or a non-adjacent node, and adopt targeted processing respectively for the congestion response message sent by the non-adjacent node and the adjacent node. Therefore, the Diameter congestion response in the embodiment of the present invention is In the processing method, step 22 includes:

Step 221: According to the identification information of the second Diameter node in the congestion response, the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the second Diameter node is: A non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is a pre-stored adjacent node of the first Diameter node. identification information.

The above-mentioned timing function can be implemented by a timer, a module with a timing function, or a software code with a timing function, which can be used to preset a timing length. The timer may also be called a TOO BUSY timer and is used to switch back to the original route after the route is switched for a period of time.

The first Diameter node judges that the congestion response DIAMETER_TOO_BUSY is generated by a non-adjacent node, does not perform route switching and does not start the TOO BUSY timer, and subsequent request messages are still on the original route, which can effectively avoid single-point congestion in the Diameter signaling network. The entire network is congested, and it can also effectively avoid large-scale route switching and the resulting increased signaling load of the switching route.

The first Diameter node receives the congestion response, and judges whether the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node. Adjacent nodes, the first Diameter node obtains the number of congestion responses and adjusts the proportion of messages sent to the second Diameter node, and when the congestion response exceeds the preset threshold, the first Diameter node performs route switching and starts the timer, and then when the During the timing of the route switching of the timer, the first Diameter node is routed from the third Diameter node to the original second Diameter node, so that the route switching will not be performed in a large range, and the information of the route switching will be reduced. order load.

As shown in FIG. 4 , a specific example of processing a non-adjacent node to generate a congestion response according to an embodiment of the present invention is as follows.

1). Diameter routing agent 3 returns a congestion response DIAMETER_TOO_BUSY to Diameter routing agent 1 due to internal congestion.

2). Diameter routing agent 1 performs route switching after receiving a large number of congestion responses, and forwards the congestion response DIAMETER_TOO_BUSY to the Diameter source node. The Diameter source node judges that the congestion response DIAMETER_TOO_BUSY is generated by a non-adjacent node, does not perform route switching, does not start the TOO BUSY timer, and the subsequent request messages are still sent to the active node Diameter routing agent 1, and will not be switched to the standby node Diameter routing agent 2.

3). In this proposal, when a single node in the Diameter signaling network (Diameter Routing Agent 3 in Figure 3) generates internal congestion, only the node adjacent to Diameter Routing Agent 1 performs route switching, and the non-adjacent Diameter source node does not. Route switching will be performed, and the TOO BUSY timer will not be started, so there will be no situation where the message cannot be sent before the TOO BUSY timer expires. Diameter nodes do not start congestion control in response to congestion generated by non-adjacent nodes, which can effectively prevent single-point congestion in the Diameter signaling network from spreading to the entire network, and can also effectively avoid large-scale route switching and the resulting switching routing signaling. Loading problem.

The first Diameter node starts the TOOBUSY counter when it receives the congestion response DIAMETER_TOO_BUSY from the adjacent node, performs route switching and starts the TOO BUSY timer after the TOO BUSY counter exceeds the threshold, so as to effectively control the timing of route switching and avoid short-term Accidental or erroneously generated congestion responses add to the load of switching routes.

As shown in FIG. 5 , a specific example of the processing of generating a congestion response to an adjacent node according to an embodiment of the present invention is as follows.

1). Diameter routing agent 3 returns a congestion response DIAMETER_TOO_BUSY to Diameter routing agent 1 due to internal congestion.

2). Diameter routing agent 1 does not perform route switching immediately after receiving the congestion response, but starts the TOOBUSY counter and sets the threshold (the counter is cleared after the congestion response DIAMETER_TOO_BUSY is not received for a configurable period of time), and adjusts to Diameter routing The proportion of messages sent by proxy 3 and Diameter routing proxy 4 (under normal circumstances, all messages are sent to Diameter routing proxy 3 or load sharing is sent to 3 and Diameter routing proxy 4). At this time, a small part (less than 50%) of messages are sent to Diameter Routing Agent 3. Most (greater than 50%) messages are sent to Diameter Routing Agent 4).

3). When Diameter routing agent 3 returns a large amount of congestion response DIAMETER_TOO_BUSY that exceeds the counter threshold, the TOO BUSY counter of Diameter routing agent 1 exceeds the threshold. At this time, Diameter routing agent 1 performs route switching and sends all request messages to Diameter routing agent 4 , and start the TOO BUSY timer, and try to send the request message to Diameter routing agent 3 after the TOO BUSY timer expires.

4). In this proposal, when a single node in the Diameter signaling network (Diameter routing agent 3 in Figure 3) generates internal congestion, the adjacent Diameter nodes will not perform routing until the number of received congestion responses DIAMETER_TOO_BUSY exceeds the threshold. Switching and starting the TOO BUSY timer can effectively control the timing of route switching and the ratio of message sending (congested route < non-congested route), and avoid the overload of route switching due to accidental or erroneous congestion response in a short period of time.

Correspondingly, as shown in FIG. 6 , a processing apparatus for Diameter congestion response according to another embodiment of the present invention is applied to a Diameter routing proxy node and/or a Diameter signaling node, and the processing apparatus includes:

The receiving module 61 is used for the first Diameter node to receive a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response;

Judging and processing module 62, for if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or

If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response and adjusts the message ratio of the second Diameter node, and When the number of the congestion responses exceeds a preset threshold, perform route switching to a third Diameter node to transmit a message, wherein the link connection priority of the third Diameter node is lower than the link connection priority of the second Diameter node Or the third Diameter node is a preset multiple Diameter nodes based on load sharing.

The first Diameter node receives the congestion response by the receiving module 61, and judges whether the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node. If the judgment processing module 62 judges that it is a non-adjacent node, the first Diameter node No route switching is performed, if the judgment processing module 62 judges that it is an adjacent node, the first Diameter node obtains the number of congestion responses and adjusts the proportion of messages sent to the second Diameter node, and when the congestion response exceeds the preset threshold, the first Diameter node The node performs route switching, so that only the routes of adjacent nodes are switched, and no large-scale route switching is performed, and when the congestion response reaches the preset threshold, the first Diameter node performs the switching, which also avoids only one or a few congestion. A wide range of switching occurs in response to the occurrence, and the signaling load of the switching route is reduced at the same time.

In the apparatus for processing a Diameter congestion response according to another embodiment of the present invention, when the third Diameter node is pre-set multiple Diameter nodes based on load sharing, the judging processing module 62 includes:

The first judgment and adjustment submodule is used for if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts the number of messages sent to the second Diameter node Less than the number of messages sent to the third Diameter node.

In the apparatus for processing Diameter congestion response according to still another embodiment of the present invention, when the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the judgment processing module include:

The second judging and adjusting sub-module is configured to, if the second Diameter node generating the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not perform route switching to the third Diameter node to transmit messages, and the first Diameter node reduces the number of messages sent to the second Diameter node .

In the apparatus for processing Diameter congestion response according to another embodiment of the present invention, the judgment processing module 62 further includes:

The first judging submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node finds the second Diameter node in the adjacent signaling node list, then the first Diameter node Two Diameter nodes are adjacent nodes of the first Diameter node;

A processing sub-module, configured to acquire the number of the congestion responses and adjust the sending to the second Diameter node after the second Diameter node is an adjacent node of the first Diameter node message ratio, and when the number of congestion responses exceeds a preset threshold, route switching is performed to the third Diameter node to deliver messages and timing is performed, wherein the adjacent signaling node list is pre-stored in the first Diameter node The identification information of the adjacent nodes.

In yet another embodiment of the present invention, the processing apparatus for Diameter congestion response, the processing apparatus further includes:

The control rewinding module 63 is configured to control the first Diameter node to rewind the route from the third Diameter node to the second Diameter node to transmit a message after the timing time reaches a preset time.

In the apparatus for processing Diameter congestion response according to another embodiment of the present invention, the judgment processing module 62 includes:

The second judgment submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the The second Diameter node is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is pre-stored for the first Diameter node The identification information of the adjacent nodes.

The first Diameter node receives the congestion response through the receiving module 61, and judges whether the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node. If the second judgment sub-module judges that it is a non-adjacent node, no routing is performed. Switching does not start the timer. If the first judgment sub-module determines that it is an adjacent node, the first Diameter node obtains the number of congestion responses through the processing sub-module and adjusts the proportion of messages sent to the second Diameter node, and when the congestion response exceeds When the preset threshold is reached, the first Diameter node performs route switching and starts a timer, and then when the timing time of the route switching of the timer exceeds, the control rewind module 63 is used for the first Diameter node to route from the third Diameter node. Returning to the original second Diameter node, in this way, route switching will not be performed in a large range, and the signaling load of the route switching will be reduced.

It should be noted that the device provided by the present invention is a device applying the above-mentioned Diameter congestion response processing method, and all the above-mentioned embodiments of the Diameter congestion response processing method are applicable to the device, and can achieve the same or similar beneficial effects .

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (12)

1. a processing method of Diameter congestion response, applied to Diameter routing proxy node and/or Diameter signaling node, it is characterized in that, described processing method comprises: The first Diameter node receives a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response; If the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion response, and adjusts the message sent to the second Diameter node When the number of the congestion responses exceeds the preset threshold, the route is switched to the third Diameter node, and the message is transmitted through the third Diameter node, wherein the link connection priority of the third Diameter node is lower than the The link connection priority of the second Diameter node or the third Diameter node is one of multiple Diameter nodes preset based on load sharing. 2 . The processing method according to claim 1 , wherein when the third Diameter node is one of a plurality of Diameter nodes preset based on load sharing, the adjustment is directed to the second Diameter node. 3 . The steps for the proportion of messages sent by Diameter nodes include: If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, and when the number of the congestion responses obtained by the first Diameter node does not exceed the preset threshold of the number of the congestion responses, The first Diameter node does not switch routes to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts the number of messages sent to the second Diameter node to be less than the number of messages sent to the third Diameter node. The number of messages sent. 3. The processing method according to claim 1, wherein when the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the adjustment is directed to the The steps of describing the ratio of messages sent by the second Diameter node include: If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, and when the number of the congestion responses obtained by the first Diameter node does not exceed the preset threshold of the number of the congestion responses, The first Diameter node does not switch routes to the third Diameter node to deliver messages, and the first Diameter node reduces the number of messages sent to the second Diameter node. 4 . The processing method according to claim 1 , wherein, if the second Diameter node that generates a congestion response is an adjacent node of the first Diameter node, the first Diameter node The node obtains the number of the congestion responses, adjusts the ratio of the messages sent to the second Diameter node, and switches the route to the third Diameter node when the number of the congestion responses exceeds a preset threshold, through the third Diameter node The steps for a node to deliver a message include: According to the identification information of the second Diameter node in the congestion response, if the first Diameter node finds the second Diameter node in the adjacent signaling node list, the second Diameter node is the first Diameter node The adjacent nodes of the Diameter node; After the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion responses and adjusts the proportion of messages sent to the second Diameter node, and at When the number of the congestion responses exceeds the preset threshold, the route is switched to the third Diameter node to deliver the message and time it, wherein the adjacent signaling node list is the adjacent nodes of the first Diameter node that are pre-stored. A list of identifying information. 5 . The processing method according to claim 4 , wherein when the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node obtains the information of the congestion response. 6 . number and adjust the proportion of messages sent to the second Diameter node, and when the number of the congestion responses exceeds a preset threshold, the route is switched to the third Diameter node to deliver messages and time the steps, the Processing methods also include: After the timing time reaches a preset time, the first Diameter node controls the first Diameter node to route back from the third Diameter node to the second Diameter node to transmit a message. 6 . The processing method according to claim 1 , wherein, if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not The steps of performing route switching include: According to the identification information of the second Diameter node in the congestion response, if the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the second Diameter node is the first Diameter node. A non-adjacent node of a Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is pre-stored with the identification information of the adjacent nodes of the first Diameter node. formed list. 7. A processing device for Diameter congestion response, applied to a Diameter routing proxy node and/or a Diameter signaling node, wherein the processing device comprises: A receiving module, used for the first Diameter node to receive a congestion response that performs an error response to the request message sent by the Diameter source node, wherein the congestion response carries the identification information of the second Diameter node that generates the congestion response; Judging and processing module, for if the second Diameter node that generates the congestion response is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching; or If the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the first Diameter node obtains the number of the congestion responses and adjusts the number of messages sent to the second Diameter node. When the number of the congestion responses exceeds the preset threshold, the route is switched to the third Diameter node, and the message is transmitted through the third Diameter node, wherein the link connection priority of the third Diameter node is lower than that of the third Diameter node. The link connection priority of the second Diameter node or the third Diameter node is one of multiple Diameter nodes preset based on load sharing. 8. The processing device according to claim 7, wherein when the third Diameter node is one of a plurality of Diameter nodes preset based on load sharing, the judging and processing module comprises: The first judgment and adjustment submodule is used for if the second Diameter node that generates the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not switch routes to the third Diameter node to transmit messages, and the first Diameter node dynamically adjusts the number of messages sent to the second Diameter node Less than the number of messages sent to the third Diameter node. 9 . The processing device according to claim 7 , wherein, when the link connection priority level of the third Diameter node is lower than the link connection priority level of the second Diameter node, the judgment processing module include: The second judging and adjusting sub-module is configured to, if the second Diameter node generating the congestion response is an adjacent node of the first Diameter node, the number of the congestion responses obtained by the first Diameter node does not exceed the number of the congestion responses. When the preset threshold of the number, the first Diameter node does not switch routes to the third Diameter node to transmit messages, and the first Diameter node reduces the number of messages sent to the second Diameter node . 10. The processing device according to any one of claims 7 or 8, wherein the judgment processing module further comprises: The first judging submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node finds the second Diameter node in the adjacent signaling node list, then the first Diameter node Two Diameter nodes are adjacent nodes of the first Diameter node; The processing submodule is configured to, after the second Diameter node is an adjacent node of the first Diameter node, the first Diameter node acquires the number of the congestion responses and adjusts the number of the congestion responses sent to the second Diameter node and when the number of the congestion responses exceeds a preset threshold, the route is switched to the third Diameter node to deliver messages and timed, wherein the adjacent signaling node list is pre-stored in the first Diameter node A list formed by the identification information of the node's neighbors. 11. The processing device according to claim 10, wherein the processing device further comprises: A control rewind module, configured to control the first Diameter node to rewind the route from the third Diameter node to the second Diameter node to transmit a message after the timing time reaches a preset time. 12. The processing device according to claim 7, wherein the judgment processing module comprises: The second judgment submodule is configured to, according to the identification information of the second Diameter node in the congestion response, the first Diameter node does not find the second Diameter node in the adjacent signaling node list, then the The second Diameter node is a non-adjacent node of the first Diameter node, the first Diameter node does not perform route switching and does not perform timing, wherein the adjacent signaling node list is pre-stored for the first Diameter node The list formed by the identification information of the adjacent nodes.