CN104717626A - Session routing information sharing method, device and system - Google Patents

Abstract

The invention discloses a session routing information sharing method, device and system. The method comprises: a DRA network element receives a Gx interface session request message, selects a PCRF network element, and stores dynamic session binding information, including the IP address of the user equipment and The host name of the PCRF network element; after receiving the Rx interface session request message, use the IP address of the user equipment carried in it to query the dynamic session binding information; if there is no corresponding record, send a route redirection request to the paired DRA network element, where Carry the IP address of the user equipment; the paired DRA network element uses this IP address to query the dynamic session binding information, and returns the host name of the corresponding PCRF network element; after receiving the host name of the PCRF network element, the DRA network element connects the Rx interface session The request message is routed and redirected to the corresponding PCRF network element. The present invention can realize routing information sharing between DRA network elements of different manufacturers without opening a synchronous interface; and flexibly realize addressing of Rx interface session request message under the condition that there is no local dynamic session binding information after fault recovery.

Description

A session routing information sharing method, device and system

technical field

The present invention relates to the field of communication technology, in particular to a session routing information sharing method, device and system.

Background technique

In the LTE (Long Term Evolution, long-term evolution) system, a Diameter (Diameter protocol) signaling interface is introduced, which requires a DRA (Diameter Routing Agent, Diameter protocol routing agent) network element to transfer Diameter signaling. Specifically, after the introduction of LTE, the network will provide users with mobility management and service bearer channels. The network architecture shown in Figure 1 stores user data in the home HSS (Home Subscriber Server, Home Location Register) database according to the user number segment. When the user roams to the visited MME (Mobility Management Entity, Mobility Management Entity) network element, the MME network element will initiate a location update and authentication process to the user's home HSS. These processes use Diameter signaling in the network The agreement is realized. In addition, the Gx, Rx, and S9 interfaces of the PCC (Policy and Charging Control) architecture will also use the Diameter protocol.

Furthermore, since users in the HSS can roam to any MME network element in the entire network, that is, users under one MME network element may belong to any HSS in the entire network, so the connection between the MME network elements in the entire network and the HSS in the entire network There is a full connection relationship; under the PCC architecture, different data services used by users during domestic roaming are controlled by the PCRF (Policy and Charging Rules Function, Policy and Charging Rules Function) network element at the home site, and one PCRF network element performs policy control Users can roam to any PGW (Packet Data Gateway) in the entire network, and users under a PGW may access any PCRF network element in the entire network, so that there is a full connection between the PGW and PCRF network elements in the entire network relation. Based on this, for the convenience of maintenance and management, DRA network elements are used when implementing Diameter signaling routing, that is, DRA network elements are used to transfer all signaling between MME network elements and HSS, or between PGW and PCRF network elements To avoid network-wide data configuration and maintenance problems brought about by full connectivity. In addition, in order to ensure safety and reliability, DRA network elements will be deployed in pairs to back up each other and share the load.

After the introduction of VoLTE (voice service based on IMS (IP Multimedia Subsystem, IP Multimedia System)), in order to ensure the quality of voice service, a session policy control mechanism was introduced, that is, when a user initiates a call, it needs to apply for the establishment of a dedicated bearer according to the session control policy. In the process of establishing a dedicated bearer, the Rx interface between the AF (Application Function, application function) network element and the PCRF network element is involved. The corresponding network structure is shown in Figure 2. The establishment process of the dedicated bearer includes the following steps:

Step 1. The UE (User Equipment, user equipment) establishes a default bearer. During the establishment process, the PGW sends a Gx interface session request message to the PCRF network element through the DRA network element, and the PCRF network element receives the message from the DRA network element. After the Gx interface session request message, a default bearer is established for the UE.

Step 2. The UE initiates a call request through the default bearer, and during the process of UE initiating a call request, the AF network element will send an Rx interface session request message to the PCRF network element through the DRA network element, and the PCRF network element will receive the message from the DRA After the session request message of the dedicated Rx interface of the network element, a dedicated bearer is established for the UE.

In the above process, the process of establishing the default bearer and dedicated bearer for the UE needs to be controlled by the same PCRF network element, but because the DRA network elements are deployed in pairs, the Gx interface session request message and the Rx interface session request message are sent to the PCRF network element The DRA network elements may not be the same DRA network element. At this time, the two DRA network elements cannot send the Gx interface session request message and the Rx interface session request message to the same PCRF network element, which leads to the failure of the UE's dedicated bearer establishment process. And affect the user experience.

Contents of the invention

Embodiments of the present invention provide a session routing information sharing method, device and system to ensure that the Gx interface session request message and the Rx interface session request message are sent to the same PCRF network element.

In order to achieve the above object, an embodiment of the present invention provides a method for sharing session routing information, which is applied to a policy and charging control PCC network including two Diameter protocol routing agent DRA network elements, and the two DRA network elements interact with each other. For pairing DRA network element, described method comprises the following steps:

The DRA network element receives the Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment for requesting to establish a default bearer; after the DRA network element receives the Gx interface session request message, Selecting a policy and charging rule function PCRF network element, and storing dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the IP address of the PCRF network element CPU name;

After the DRA network element receives the Rx interface session request message, it uses the IP address of the user equipment used to request the establishment of a dedicated bearer carried in the Rx interface session request message to query the dynamic session binding stored on the DRA network element. If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, a route redirection request is sent to the paired DRA network element of the DRA network element, and the route redirection request carries The IP address of the user equipment is obtained; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the PCRF network corresponding to the IP address of the user equipment. the hostname of the meta;

After receiving the host name of the PCRF network element, the DRA network element uses the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element.

An embodiment of the present invention provides a Diameter protocol routing proxy DRA network element, which is applied to a policy and charging control PCC network including two DRA network elements, and the two DRA network elements are paired DRA network elements, and the DRA network elements specifically include:

A maintenance module, configured to receive a Gx interface session request message, the Gx interface session request message carrying the IP address of the user equipment for requesting to establish a default bearer; after receiving the Gx interface session request message, select a policy and A charging rule function PCRF network element, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element;

The first query module is configured to, after receiving the Rx interface session request message, use the IP address of the user equipment carrying in the Rx interface session request message to request to establish a dedicated bearer to query the dynamic information stored on the DRA network element session binding information;

The first sending module is configured to send a route redirection request to the paired DRA network element of the DRA network element when there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, and the route redirection request The directional request carries the IP address of the user equipment; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the IP address of the user equipment The host name of the corresponding PCRF network element;

The second sending module is configured to route and redirect the Rx interface session request message to a corresponding PCRF network element by using the host name of the PCRF network element after receiving the host name of the PCRF network element.

An embodiment of the present invention provides a system for sharing session routing information. The system includes two Diameter protocol routing agent DRA network elements, and the two DRA network elements are paired DRA network elements, wherein:

The DRA network element is used to receive the Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment used to request the establishment of a default bearer; after receiving the Gx interface session request message, select the policy and plan A fee rule function PCRF network element, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element; After receiving the Rx interface session request message, query the dynamic session binding information stored on the DRA network element by using the IP address of the user equipment carried in the Rx interface session request message for requesting to establish a dedicated bearer; if the If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, a route redirection request is sent to the paired DRA network element of the DRA network element, and the route redirection request carries the IP address of the user equipment ;

The paired DRA network element is configured to use the IP address of the user equipment carried in the route redirection request to query the dynamic session stored on the paired DRA network element after receiving the route redirection request from the DRA network element Binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and sending the host name of the PCRF network element to the DRA network element;

The DRA network element is further configured to use the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element after receiving the host name of the PCRF network element.

Compared with the prior art, the embodiment of the present invention has at least the following advantages: in the embodiment of the present invention, it can be ensured that two DRA network elements send the Gx interface session request message and the Rx interface session request message to the same PCRF network element, avoiding The UE's dedicated bearer fails to be established, which improves user experience. The above process can realize the sharing of routing information between DRA network elements of different manufacturers, without opening the synchronization interface, avoiding the increase of the forwarding delay of all Gx interface-related messages, and can be flexible when there is no local dynamic session binding information after the fault is recovered. Implement the addressing of Rx interface session request messages.

Description of drawings

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

FIG. 1 is a schematic diagram of a network providing mobility management and service bearer channels for users in the prior art;

FIG. 2 is a schematic diagram of a network structure of a dedicated bearer establishment process in the prior art;

FIG. 3 is a flow chart of a session routing information sharing method provided by Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a DRA network element proposed in Embodiment 2 of the present invention.

Detailed ways

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

Embodiment one

Aiming at the problems existing in the prior art, Embodiment 1 of the present invention proposes a session routing information sharing method, which is applied to a PCC network including two DRA network elements, and the two DRA network elements are paired DRA network elements . Figure 2 is a schematic diagram of an application scenario of Embodiment 1 of the present invention. DRA network element 1 and DRA network element 2 are paired DRA network elements, that is, DRA network element 1 is a paired DRA network element of DRA network element 2, and DRA network element 2 is a paired DRA network element. It is the paired DRA network element of DRA network element 1. In addition, the Gx interface is used between the PGW and the DRA network element, and the Rx interface is used between the AF network element and the DRA network element.

In the above application scenario, as shown in Figure 3, the bearer establishment method includes the following steps:

Step 301, the DRA network element receives a Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment used to request to establish a default bearer.

Wherein, the Gx interface session request message is used to establish a default bearer, and is a message based on the Gx interface, that is, the Gx interface session request message is sent by the PGW to the DRA network element through the Gx interface.

Step 302: After receiving the Gx interface session request message, the DRA network element selects the PCRF network element, and stores dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the Gx interface session request message. The carried IP address of the user equipment and the host name of the PCRF network element.

Wherein, after the DRA network element selects the PCRF network element, it also needs to send the Gx interface session request message received by itself to the selected PCRF network element, and the PCRF network element establishes a default bearer.

In the embodiment of the present invention, after receiving the Gx interface session request message, the DRA network element will select the corresponding PCRF network element for the user equipment, and send the Gx interface session request message to the PCRF network element, and The dynamic session binding information is stored on the element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element.

Further, the Gx interface session request message also carries user identification, APN (AccessPoint Name, access point name), Session ID (session ID) and other information; based on this, at least the user ID is included in the dynamic session binding information Correspondence between the IP address of the device, the host name of the PCRF network element, user ID, APN, and Session ID.

In the application scenario shown in Figure 2, after DRA network element 1 receives the Gx interface session request message of the Gx interface of user equipment 1, it sends the Gx interface session request message to PCRF network element 1, and the DRA network element 1 stores dynamic session binding information, and the dynamic session binding information includes the IP address of the user equipment 1, the host name of the PCRF network element 1, the user identifier, the APN, and the correspondence between the Session ID. After receiving the Gx interface session request message of the Gx interface of the user equipment 2, the DRA network element 2 sends the Gx interface session request message to the PCRF network element 2, and stores the dynamic session binding information on the DRA network element 2, and The dynamic session binding information includes the correspondence between the IP address of the user equipment 2, the host name of the PCRF network element 2, the user identifier, the APN, and the Session ID.

Step 303, the DRA network element receives the Rx interface session request message, and the Rx interface session request message carries the IP address of the user equipment for requesting to establish a dedicated bearer.

Wherein, the Rx interface session request message is used to establish a dedicated bearer, and is a message based on the Rx interface, that is, the Rx interface session request message is sent by the AF network element to the DRA network element through the Rx interface.

Step 304: After receiving the Rx interface session request message, the DRA network element uses the IP address of the user equipment carried in the Rx interface session request message to query the dynamic session binding information stored on the DRA network element. If there is a record corresponding to the IP address of the user equipment in the dynamic session binding information, step 305 is performed. If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, step 306 is performed.

Step 305, the DRA network element obtains the host name of the PCRF network element corresponding to the IP address of the user equipment (the IP address of the user equipment carried in the Rx interface session request message) from the dynamic session binding information, and sends the Rx interface session request message Send to the PCRF network element corresponding to the host name of the PCRF network element.

Step 306, the DRA network element sends a route redirection request to the paired DRA network element of the current DRA network element, and the route redirection request carries the IP address of the user equipment. Wherein, the IP address of the user equipment is specifically the IP address of the user equipment carried in the Rx interface session request message.

Step 307: After receiving the route redirection request, the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and obtains the PCRF network element corresponding to the IP address of the user equipment. host name, and return the host name of the PCRF network element to the DRA network element.

Specifically, after receiving the route redirection request from the DRA network element, the paired DRA network element uses the IP address of the user equipment carried in the route redirection request to query the dynamic session binding information stored on the paired DRA network element, To obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and send the host name of the PCRF network element corresponding to the IP address of the user equipment to the DRA network element. Further, in the process that the paired DRA network element sends the host name of the PCRF network element corresponding to the IP address of the user equipment to the DRA network element, the paired DRA network element sends a route redirection response to the DRA network element, and the route redirection The response carries the host name of the PCRF network element and the routing redirection indication, and the routing redirection indication is used to instruct the DRA network element to redirect the Rx interface session request message received by the DRA network element to the PCRF network element's The PCRF NE corresponding to the host name.

Step 308: After receiving the host name of the PCRF network element, the DRA network element uses the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element.

In the embodiment of the present invention, after the DRA network element receives the route redirection request from the paired DRA network element of the own DRA network element, it uses the IP address of the user equipment carried in the route redirection request to query the information stored on the DRA network element. dynamic session binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and send the host name of the PCRF network element corresponding to the IP address of the user equipment to the paired DRA network element. Further, when the DRA network element sends the host name of the PCRF network element to the paired DRA network element, the DRA network element sends a route redirection response to the paired DRA network element, and the route redirection response carries the PCRF network The host name of the element and the route redirection indication, and the route redirection indication is used to instruct the paired DRA network element to route and redirect the Rx interface session request message received by the paired DRA network element to the PCRF corresponding to the host name of the PCRF network element network element.

DRA network element 1 stores dynamic session binding information on DRA network element 1, and the dynamic session binding information includes the correspondence between the IP address of user equipment 1 and the host name of PCRF network element 1; DRA network element 2 The dynamic session binding information is stored on the DRA network element 2, and the dynamic session binding information includes the correspondence between the IP address of the user equipment 2 and the host name of the PCRF network element 2.

In the application scenario shown in Figure 2, after DRA network element 1 receives the Rx interface session request message, if the IP address carried in the Rx interface session request message is the IP address of user equipment 1, then DRA network element 1 uses the user equipment The IP address of device 1 queries the dynamic session binding information stored on DRA network element 1 (a dynamic database query can be used), and at this time the dynamic session binding information contains a record corresponding to the IP address of user equipment 1, that is, the user equipment is obtained The host name of PCRF network element 1 corresponding to the IP address of 1, replace the destination address of the Rx interface session request message with the IP address of PCRF network element 1, and send the Rx interface session request message to the IP address of PCRF network element 1 The corresponding PCRF network element 1.

In the application scenario shown in Figure 2, after DRA network element 1 receives the Rx interface session request message, if the IP address carried in the Rx interface session request message is the IP address of user equipment 2, DRA network element 1 uses the user equipment 2's IP address to query the dynamic session binding information stored on DRA network element 1 (dynamic database query can be used), at this time, there is no record corresponding to the IP address of user equipment 2 in the dynamic session binding information, DRA network element 1 sends DRA Network element 2 sends a route redirection request, and the route redirection request carries the IP address of user equipment 2 (at this time, the IP address of user equipment 2 is sent instead of the Rx interface session request message). After the DRA network element 2 receives the route redirection request, it uses the IP address of the user equipment 2 to query the dynamic session binding information stored on the DRA network element 2, and obtains the host name of the PCRF network element 2 corresponding to the IP address of the user equipment 2 , and return the host name of the PCRF network element 2 to the DRA network element 1. After receiving the host name of PCRF network element 2, DRA network element 1 replaces the destination address of the Rx interface session request message with the host name of PCRF network element 2, and routes and redirects the Rx interface session request message to the PCRF network The host name of element 2 corresponds to the PCRF network element 2.

To sum up, in the embodiment of the present invention, it can be ensured that the two DRA network elements send the Gx interface session request message and the Rx interface session request message to the same PCRF network element, so as to avoid the failure of UE dedicated bearer establishment and improve user experience . The above process can realize the sharing of routing information between DRA network elements of different manufacturers, without opening the synchronization interface, avoiding the increase of the forwarding delay of all Gx interface-related messages, and can be flexible when there is no local dynamic session binding information after the fault is recovered. Implement the addressing of Rx interface session request messages.

Embodiment two

Based on the same inventive concept as the above-mentioned method, a Diameter protocol routing proxy DRA network element is proposed in Embodiment 2 of the present invention, which is applied to a policy and charging control PCC network including two DRA network elements, and the two DRA The network elements are paired DRA network elements, as shown in Figure 4, the DRA network elements specifically include:

The maintenance module 11 is configured to receive a Gx interface session request message, the Gx interface session request message carrying the IP address of the user equipment for requesting to establish a default bearer; after receiving the Gx interface session request message, select a strategy A PCRF network element with a charging rule function, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element ;

The first query module 12 is configured to, after receiving the Rx interface session request message, use the IP address of the user equipment carried in the Rx interface session request message to request the establishment of a dedicated bearer to query the information stored on the DRA network element Dynamic session binding information;

The first sending module 13 is configured to send a route redirection request to the paired DRA network element of the DRA network element when there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, and the route The redirection request carries the IP address of the user equipment; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the IP address of the user equipment The host name of the PCRF network element corresponding to the address;

The second sending module 14 is configured to route and redirect the Rx interface session request message to a corresponding PCRF network element by using the host name of the PCRF network element after receiving the host name of the PCRF network element.

The DRA network element also includes: a third sending module 15, configured to, after querying the dynamic session binding information stored on the DRA network element, when the dynamic session binding information contains the IP address corresponding to the user equipment When recording, obtain the hostname of the PCRF network element corresponding to the IP address of the user equipment from the dynamic session binding information, and send the Rx interface session request message to the PCRF network element corresponding to the hostname of the PCRF network element Yuan.

The DRA network element also includes: a second query module 16, configured to use the IP address of the user equipment carried in the route redirection request after receiving the route redirection request from the paired DRA network element of the DRA network element Address query the dynamic session binding information stored on the DRA network element, to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment; the fourth sending module 17 is used to send the host name of the PCRF network element to the paired DRA network element. The fourth sending module 17 is specifically configured to send a route redirection response to the paired DRA network element, where the route redirection response carries the hostname of the PCRF network element and a route redirection indication, and the route The redirection indication is used to instruct the paired DRA network element to route and redirect the Rx interface session request message received by the paired DRA network element to the PCRF network element corresponding to the host name of the PCRF network element.

Based on the above module division method, the DRA network element includes a maintenance module 11 , a first query module 12 , a first sending module 13 , a second sending module 14 , a third sending module 15 and a second query module 16 . For the Rx interface session request message and the Gx interface session request message of the same user, the module division of the DRA network element receiving the Rx interface session request message or the Gx interface session request message is as follows:

(1) If the DRA network element receives the Gx interface session request message, but does not receive the corresponding Rx interface session request message, the DRA network element includes: a maintenance module 11, which is used to receive the Gx interface session request message, and the Gx interface session request message The request message carries the IP address of the user equipment used to request the establishment of the default bearer; after receiving the Gx interface session request message, select the PCRF network element, and store the dynamic session binding information on the DRA network element, and the dynamic session binding The given information includes at least the IP address of the user equipment and the host name of the PCRF network element; the second query module 16 is configured to use the routing redirection request in the routing redirection request after receiving the routing redirection request from the paired DRA network element of the DRA network element. The IP address of the carried user equipment queries the dynamic session binding information stored on the DRA network element to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment; the fourth sending module 17 is used to use the PCRF network element The host name of the PCRF network element is sent to the paired DRA network element; the fourth sending module 17 is specifically used to send a route redirection response to the paired DRA network element, and the route redirection response carries the host name of the PCRF network element and the route redirection indication, And the route redirection indication is used to instruct the paired DRA network element to route and redirect the received Rx interface session request message to the PCRF network element corresponding to the hostname of the PCRF network element.

(2) If the Rx interface session request message is received on the DRA network element, but the corresponding Gx interface session request message is not received, the DRA network element includes: a first query module 12 for receiving the Rx interface session request message Afterwards, use the IP address of the user equipment for requesting to establish a dedicated bearer carried in the Rx interface session request message to query the dynamic session binding information stored on the DRA network element; the third sending module 15 is used for when the dynamic session binding information When there is a record corresponding to the IP address of the user equipment, obtain the host name of the PCRF network element corresponding to the IP address of the user equipment from the dynamic session binding information, and send the Rx interface session request message to the PCRF network element The PCRF network element corresponding to the hostname; the first sending module 13, configured to send a routing redirection request to the paired DRA network element of the DRA network element when there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, And the IP address of the user equipment is carried in the route redirection request; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the IP address corresponding to the user equipment The host name of the PCRF network element; the second sending module 14, after receiving the host name of the PCRF network element, use the host name of the PCRF network element to redirect the Rx interface session request message route to the corresponding PCRF network element .

Embodiment three

Based on the same inventive concept as the above method, a session routing information sharing system is proposed in Embodiment 2 of the present invention, the system includes two Diameter protocol routing proxy DRA network elements, and the two DRA network elements are paired DRA network elements ,in:

The DRA network element is used to receive the Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment used to request the establishment of a default bearer; after receiving the Gx interface session request message, select the policy and plan A fee rule function PCRF network element, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element; After receiving the Rx interface session request message, query the dynamic session binding information stored on the DRA network element by using the IP address of the user equipment carried in the Rx interface session request message for requesting to establish a dedicated bearer; if the If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, a route redirection request is sent to the paired DRA network element of the DRA network element, and the route redirection request carries the IP address of the user equipment ;

The paired DRA network element is configured to use the IP address of the user equipment carried in the route redirection request to query the dynamic session stored on the paired DRA network element after receiving the route redirection request from the DRA network element Binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and sending the host name of the PCRF network element to the DRA network element;

The DRA network element is further configured to use the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element after receiving the host name of the PCRF network element.

The DRA network element is further configured to use the IP address of the user equipment carried in the route redirection request to query the DRA network after receiving a route redirection request from a paired DRA network element of the DRA network element. The dynamic session binding information stored on the element, obtains the hostname of the PCRF network element corresponding to the IP address of the user equipment, and sends a route redirection response to the paired DRA network element, and the route redirection response carries the The hostname of the PCRF network element and the routing redirection indication, and the routing redirection indication is used to instruct the paired DRA network element to redirect the Rx interface session request message received by the paired DRA network element to the PCRF network The PCRF network element corresponding to the host name of the element;

The paired DRA network element is also used to send the Rx interface received by the paired DRA network element to The session request message is routed and redirected to the PCRF network element corresponding to the host name of the PCRF network element.

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

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

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

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

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

Claims (10)

1. A session routing information sharing method, the method is applied to the policy comprising two Diameter protocol routing agents DRA network elements and in the charging control PCC network, the two DRA network elements are paired DRA network elements each other, its features In that, the method includes the following steps: The DRA network element receives the Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment for requesting to establish a default bearer; after the DRA network element receives the Gx interface session request message, Selecting a policy and charging rule function PCRF network element, and storing dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the IP address of the PCRF network element CPU name; After the DRA network element receives the Rx interface session request message, it uses the IP address of the user equipment used to request the establishment of a dedicated bearer carried in the Rx interface session request message to query the dynamic session binding stored on the DRA network element. If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, a route redirection request is sent to the paired DRA network element of the DRA network element, and the route redirection request carries The IP address of the user equipment is obtained; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the PCRF network corresponding to the IP address of the user equipment. the hostname of the meta; After receiving the host name of the PCRF network element, the DRA network element uses the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element. 2. The method of claim 1, further comprising: After the DRA network element queries the dynamic session binding information stored on the DRA network element, if there is a record corresponding to the IP address of the user equipment in the dynamic session binding information, then from the dynamic session binding information Obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and send the Rx interface session request message to the PCRF network element corresponding to the host name of the PCRF network element. 3. The method of claim 1, further comprising: After receiving the route redirection request from the paired DRA network element of the DRA network element, the DRA network element uses the IP address of the user equipment carried in the route redirection request to query the information stored on the DRA network element. Dynamic session binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and send the host name of the PCRF network element to the paired DRA network element. 4. The method according to claim 3, wherein the process in which the DRA network element sends the host name of the PCRF network element to the paired DRA network element specifically includes: The DRA network element sends a route redirection response to the paired DRA network element, the route redirection response carries the host name of the PCRF network element and the route redirection indication, and the route redirection indication is used to indicate The paired DRA network element routes and redirects the Rx interface session request message received by the paired DRA network element to the PCRF network element corresponding to the hostname of the PCRF network element. 5. A Diameter protocol routing agent DRA network element is applied to the strategy and charging control PCC network comprising two DRA network elements, and the two DRA network elements are paired DRA network elements each other, and it is characterized in that the The above-mentioned DRA network elements specifically include: A maintenance module, configured to receive a Gx interface session request message, the Gx interface session request message carrying the IP address of the user equipment for requesting to establish a default bearer; after receiving the Gx interface session request message, select a policy and A charging rule function PCRF network element, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element; The first query module is configured to, after receiving the Rx interface session request message, use the IP address of the user equipment that is used to request the establishment of a dedicated bearer carried in the Rx interface session request message to query the dynamic information stored on the DRA network element session binding information; The first sending module is configured to send a route redirection request to the paired DRA network element of the DRA network element when there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, and the route redirection request The directional request carries the IP address of the user equipment; the paired DRA network element uses the IP address of the user equipment to query the dynamic session binding information stored on the paired DRA network element, and returns the IP address of the user equipment The host name of the corresponding PCRF network element; The second sending module is configured to route and redirect the Rx interface session request message to a corresponding PCRF network element by using the host name of the PCRF network element after receiving the hostname of the PCRF network element. 6. DRA network element as claimed in claim 5, is characterized in that, also comprises: The third sending module is configured to, after querying the dynamic session binding information stored on the DRA network element, when there is a record corresponding to the IP address of the user equipment in the dynamic session binding information, from the dynamic session The host name of the PCRF network element corresponding to the IP address of the user equipment is obtained from the binding information, and the Rx interface session request message is sent to the PCRF network element corresponding to the host name of the PCRF network element. 7. DRA network element as claimed in claim 5, is characterized in that, also comprises: The second query module is configured to use the IP address of the user equipment carried in the route redirection request to query the DRA network element after receiving the route redirection request from the paired DRA network element of the DRA network element Stored dynamic session binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment; The fourth sending module is configured to send the host name of the PCRF network element to the paired DRA network element. 8. The DRA network element according to claim 7, wherein the fourth sending module is specifically configured to send a route redirection response to the paired DRA network element, and the route redirection response carries the The hostname of the PCRF network element and the routing redirection indication, and the routing redirection indication is used to instruct the paired DRA network element to redirect the Rx interface session request message received by the paired DRA network element to the PCRF network The PCRF network element corresponding to the host name of the element. 9. A session routing information sharing system, characterized in that the system includes two Diameter protocol routing agent DRA network elements, and the two DRA network elements are paired DRA network elements each other, wherein: The DRA network element is used to receive the Gx interface session request message, and the Gx interface session request message carries the IP address of the user equipment used to request the establishment of a default bearer; after receiving the Gx interface session request message, select the policy and plan A fee rule function PCRF network element, and store dynamic session binding information on the DRA network element, and the dynamic session binding information includes at least the IP address of the user equipment and the host name of the PCRF network element; After receiving the Rx interface session request message, query the dynamic session binding information stored on the DRA network element by using the IP address of the user equipment carried in the Rx interface session request message for requesting to establish a dedicated bearer; if the If there is no record corresponding to the IP address of the user equipment in the dynamic session binding information, a route redirection request is sent to the paired DRA network element of the DRA network element, and the route redirection request carries the IP address of the user equipment ; The paired DRA network element is configured to use the IP address of the user equipment carried in the route redirection request to query the dynamic session stored on the paired DRA network element after receiving the route redirection request from the DRA network element Binding information to obtain the host name of the PCRF network element corresponding to the IP address of the user equipment, and sending the host name of the PCRF network element to the DRA network element; The DRA network element is further configured to use the host name of the PCRF network element to route and redirect the Rx interface session request message to the corresponding PCRF network element after receiving the host name of the PCRF network element. 10. The system of claim 9, wherein: The DRA network element is further configured to use the IP address of the user equipment carried in the route redirection request to query the DRA network after receiving a route redirection request from a paired DRA network element of the DRA network element. The dynamic session binding information stored on the element, obtains the hostname of the PCRF network element corresponding to the IP address of the user equipment, and sends a route redirection response to the paired DRA network element, and the route redirection response carries the The hostname of the PCRF network element and the routing redirection indication, and the routing redirection indication is used to instruct the paired DRA network element to redirect the Rx interface session request message received by the paired DRA network element to the PCRF network The PCRF network element corresponding to the host name of the element; The paired DRA network element is also used to send the Rx interface received by the paired DRA network element to The session request message is routed and redirected to the PCRF network element corresponding to the host name of the PCRF network element.