Method and system for controlling policy and charging rules function (PCRF) load balance and redirect diameter routing agent (DRA)
A load balancing and redirection technology, applied in the field of communication, can solve the problem of not guaranteeing PCRF load balancing
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Embodiment 1
[0055] This embodiment is described by taking redirection of the DRA control to a low-load PCRF to establish a diameter session and obtaining state information of the PCRF in a non-roaming scenario as an example. Figure 4 Describes that when the client, redirected DRA, and PCRF are all in the home network, the process of establishing a diameter session is triggered by an external event, in which the DRA obtains PCRF load information and controls the establishment of a diameter session to the PCRF with a lower load. But this example is also applicable to Figure 4 All the NEs shown are in the visited network.
[0056] Such as Figure 4 As shown, the steps of the process are described as follows:
[0057] Step 401: The client redirecting the DRA receives an external trigger (such as an IP-CAN session establishment request), and needs to establish a diameter session with the PCRF;
[0058] Step 402: the client sends a diameter establishment request with user information (such...
Embodiment 2
[0068] In this embodiment, the home site redirects the DRA control to the low-load home PCRF to establish a diameter session and obtain the PCRF status information as an example for illustration in a roaming scenario. Figure 5 Describes the signaling process of the visited PCRF locating the home PCRF via the home redirected DRA and establishing a diameter session, wherein the DRA obtains PCRF load information and controls the establishment of the diameter session to the PCRF with a lower load.
[0069] Such as Figure 5 As shown, the steps of the signaling process are described as follows:
[0070] Step 501: The V-PCRF at the visited site receives an external trigger (such as an IP-CAN session establishment request), and needs to establish a diameter session with the H-PCRF at the home site through the S9 interface;
[0071] Step 502: V-PCRF sends an Rx / S9 diameter establishment request with user information (such as UE-NAI) to the redirected H-DRA;
[0072] Step 503: H-DRA...
Embodiment 3
[0082] In this embodiment, the redirection DRA obtains the PCRF load status information in the process of terminating a diameter session in a non-roaming scenario for illustration. Figure 6 Describes the process of redirecting the client of the DRA to end the diameter session, where the DRA obtains the load information of the PCRF through the client. This embodiment is also applicable to the scenario where the foreign client terminates the diameter session by visiting the DRA.
[0083] Such as Figure 6 As shown, each step is described as follows:
[0084] Step 601: Client receives an external trigger (for example, UE or PCRF initiates IP-CAN session termination) and needs to terminate the diameter session with PCRF;
[0085] Step 602: Client (BBERF or PCEF only) sends a diameter session termination request to the redirected DRA. If the client does not send a session termination request to PCRF at the same time, it also needs to carry a waiting indicator bit in the message ...
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