CN105050072A - Session binding method and network system - Google Patents

Abstract

The invention discloses a session binding method and a network system in an embodiment and relates to the technical field of communications. The session binding method is capable of realizing the binding of DRA2 and DRA1 to the same PCRF. The method of the embodiment comprises the following steps: the first DRA receives a response message sent by the PCRF, wherein the response message carries PCRF binding information; the first DRA obtains the PCRF binding information and stores the PCRF binding information in a first database; the first DRA sends a data synchronization request message to the second DRA via a data transmission channel, wherein the data synchronization request carries the PCRF binding information; and the second DRA saves the PCRF binding information so that the second DRA can be bound to the PCRF according to the PCRF binding information. The session binding method is suitable for a network system.

Description

Method and network system for session binding

technical field

The invention relates to the technical field of communication, in particular to a session binding method and a network system.

Background technique

With the development of communication technology, in order to improve the accuracy of addressing, PCC (Policy and Charging Control, policy and charging control) sessions of the same user on different interfaces are usually bound to the same PCRF (Policy and Charging Rules Function, policy and charging rule functional entities). Among them, the PCC session can implement service control and charging. Currently, a method for binding PCC sessions of the same user on different interfaces to the same PCRF is as follows:

When PCEF (PolicyandChargingEnforcementFunction, policy and charging enforcement function entity) sends a Gx interface message carrying IMSI (InternationalMobileSubscriberIdentificationNumber, International Mobile Subscriber Identification Number) and user IP (InternetProtocol, Internet Protocol) address to DRA (DiameterRoutingAgent, routing proxy node) 1 , DRA1 determines the PCRF according to the IMSI sent by PCEF, the user's IP address, and the pre-stored correspondence between IMSI and PCRF on DRA1, and stores the correspondence between IMSI, the user's IP address, and PCRF in the storage area of DRA1 ; DRA1 synchronizes the corresponding relationship between IMSI, user's IP address and PCRF to DRA2 through the private interface between DRA1 and DRA2; when AF (ApplicationFunction, application function entity) initiates an Rx interface message to DRA2, DRA2 The carried user's IP address, as well as the corresponding relationship between the IMSI, the user's IP address, and the PCRF, determines the PCRF, so that DRA1 and DRA2 are bound to the same PCRF, that is, the PCC sessions of the same user on the Gx and Rx interfaces are bound to the same PCRF.

However, when DRA1 and DRA2 belong to different manufacturers, DRA1 and DRA2 cannot communicate through the private interface, that is, DRA1 cannot send the corresponding relationship between IMSI, user IP address and PCRF to DRA2 through the private The Rx interface message, and the corresponding relationship between the IMSI, the user's IP address, and the PCRF determine the PCRF bound to DRA1, resulting in the failure of the PCC session to be bound to the same PCRF, so that DRA2 and DRA1 cannot be bound to the same PCRF.

Contents of the invention

Embodiments of the present invention provide a session binding method and network system, which can realize binding of DRA2 and DRA1 to the same PCRF.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In the first aspect, an embodiment of the present invention provides a method for session binding, the method is used in a network system, and the network system is provided with a first routing proxy node DRA, a second DRA, and a policy and charging rule functional entity PCRF , the first DRA is provided with a first database, the first database is used to store PCRF binding information, and the method includes:

The first DRA receives a response message sent by the PCRF, where the response message carries the PCRF binding information;

The first DRA acquires the PCRF binding information and stores it in the first database;

The first DRA sends a data synchronization request message to the second DRA through a data transmission channel, and the data synchronization request message carries the PCRF binding information;

The second DRA saves the PCRF binding information, so that the second DRA binds to the PCRF according to the PCRF binding information.

In the second aspect, an embodiment of the present invention provides a network system, the network system is provided with a first routing proxy node DRA, a second DRA and a policy and charging rule functional entity PCRF, and the first DRA is provided with a first database , the first database is used to store PCRF binding information, and the first DRA is used to receive a response message sent by the PCRF, the response message carrying the PCRF binding information;

The first DRA is also used to acquire the PCRF binding information and store it in the first database;

The first DRA is further configured to send a data synchronization request message to the second DRA through a data transmission channel, where the data synchronization request message carries the PCRF binding information;

The second DRA is configured to save the PCRF binding information, so that the second DRA binds to the PCRF according to the PCRF binding information.

In the method and network system for session binding provided by the embodiments of the present invention, the first DRA receives the response message carrying the PCRF binding information sent by the PCRF, and stores the PCRF binding information in the first database of the first DRA, Afterwards, a data synchronization request message carrying the PCRF binding information is sent to the second DRA through the data transmission channel, and the second DRA stores the PCRF binding information. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. In the embodiment of the present invention, the PCRF binding information may be stored in the first database by setting the first database on the first DRA, and send the PCRF binding information to the first database through the data transmission channel. The second DRA is sent to ensure that the second DRA can obtain the PCRF binding information sent by the first DRA, so that the second DRA can bind to the PCRF according to the PCRF binding information, avoiding that DRA2 and DRA1 belong to different manufacturers, so that DRA2 may The corresponding relationship between the IMSI sent by DRA1 through the private interface, the user's IP address, and the PCRF cannot be recognized, so that DRA2 cannot successfully bind the PCRF. Therefore, it is ensured that DRA2 can bind to the PCRF bound to DRA1 according to the PCRF binding information sent by DRA1, so that DRA2 and DRA1 can be bound to the same PCRF.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is an interactive diagram of a session binding method provided by an embodiment of the present invention;

FIG. 2 is an interaction diagram of another session binding method provided by an embodiment of the present invention;

FIG. 3 is an interaction diagram of another session binding method provided by an embodiment of the present invention;

FIG. 4 is an interaction diagram of another session binding method provided by an embodiment of the present invention;

FIG. 5 is an interaction diagram of another session binding method provided by an embodiment of the present invention;

FIG. 6 is an interaction diagram of another session binding method provided by an embodiment of the present invention;

FIG. 7 is a data synchronization interaction diagram in a PCC session creation process provided by an embodiment of the present invention;

FIG. 8 is a data synchronization interaction diagram during a PCC session update process provided by an embodiment of the present invention;

FIG. 9 is a data synchronization interaction diagram during a PCC session termination process provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a network system provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments 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.

The embodiment of the present invention can be used in a network system, and the network system is provided with a first DRA, a second DRA, a PCRF, and a PCEF. Wherein, the PCEF and the PCRF can communicate through the Gx interface, the first DRA is provided with a first database, and the second DRA is provided with a second database, and both the first database and the second database are used to store PCRF binding information. In the embodiment of the present invention, the network system may also be provided with an AF, and the AF and the PCRF may communicate through the Rx interface. In the IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), the AF may be a P-CSCF (Proxy-CallSessionControlFuntion, proxy call session control function entity).

An embodiment of the present invention provides a method for session binding. As shown in FIG. 1, the method is performed by the first DRA and the second DRA, and the method includes:

101. The first DRA receives a response message sent by the PCRF.

Wherein, the response message carries PCRF binding information.

PCEF can send a CCR-I (CreditControlRequest-Initial, credit control creation request) message to the first DRA, and then the first DRA sends the CCR-I message to PCPF, when the PCRF receives the CCR-I message sent by the first DRA , the PCRF sends a response message carrying PCRF binding information to the first DRA, that is, a CCA-I (CreditControlAnswer-Initial, credit control creation response) message; or, the PCEF may send a CCR-U (CreditControlRequest-Update, Credit Control Update Request) message, after which the first DRA sends the CCR-U message to the PCPF, and when the PCRF receives the CCR-U message sent by the first DRA, the PCRF sends a response carrying the PCRF binding information to the first DRA message, that is, a CCA-U (CreditControlAnswer-Update, credit control update response) message; or, the PCEF may send a CCR-T (CreditControlRequest-Termination, credit control termination request) message to the first DRA, and then the first DRA sends the CCR- The T message is sent to PCPF. When the PCRF receives the CCR-T message sent by the first DRA, the PCRF sends a response message carrying PCRF binding information to the first DRA, that is, CCA-T (CreditControlAnswer-Termination, credit control termination response )information.

102. The first DRA acquires the PCRF binding information and stores it in the first database.

In the embodiment of the present invention, the first DRA can store the PCRF binding information in the first database in the form of a table. As shown in Table 1, the PCRF binding information can specifically include: session identifier (SessionID), IMSI (InternationalMobileSubscriberIdentificationNumber , Mobile Subscriber Identity Code), MSISDN (MobileStationISDN, Integrated Services Digital Network Number of Mobile Subscriber), IP Address (IPAddress), APN (AccessPointName, Access Point Name), PCRF Host Name (PCRFHost) and PCEF Host Name ( PCEFHost).

Table I

parameter describe Session ID Identifies the user's current Gx interface session IMSI International Mobile Subscriber Identity that identifies the user MSISDN Identifies the user's mobile phone number IP Address Identifies the IP address used by the user for the current session APNs Identifies the access point name of the user's current session PCRF Host Identifies the name of the PCRF host bound to the current session of the user PCEF Host Identifies the PCEF host name of the user's current session

It should be noted that the SessionID can be used to identify different session information, and a session represents a connection between the user and the external packet data network. According to different PCC interfaces, the PCC session identifier may include: a Gx interface session identifier and an Rx interface session identifier. In the embodiment of the present invention, the session identifier specifically refers to the Gx interface session identifier.

IMSI is the International Mobile Subscriber Identity, which is a number used to uniquely identify a mobile user in a 2G/3G/4G mobile communication network, with a maximum of 15 digits. The IMSI format adopts the E.212 encoding method and consists of MCC (MobileCountryCode, mobile country code), MNC (MobileNetworkCode, mobile network number) and MSIN (MobileSubscriberIdentificationNumber, mobile subscriber identification number). Among them, MMC is composed of 3 numbers, which are used to uniquely identify the country to which the mobile user belongs, for example: MMC in China is 460; MNC is used to identify the mobile network to which the mobile user belongs, for example: the mobile network number of China Unicom has 01, 06, 09 and 10; MSIN is used to uniquely identify mobile users in the domestic China Unicom 2G/3G/4G mobile network, using 10 digits.

MSISDN is the ISDN number of the mobile user. ISDN (Integrated Service Digital Network) refers to the number dialed by the calling user to call the 2G/3G/4G mobile user. bit. The MSISDN format adopts the E.164 encoding method and consists of CC (CountryCode, country code), NDC (NationalDestinationCode, domestic destination code) and SN (SubscriberNumber, customer number). Among them, China's CC is 86; NDC is the network access number, which consists of 3 digits, namely N1N2N3, for example: China Unicom's existing NDC numbers that can be used for 2G/3G/4G users are 130, 131, 132, 156, 155, 145 and 186; SN consists of 8 bits, namely H0H1H2H3ABCD, H0H1H2H3 corresponds to the identification code of the operator's user database, which is uniformly allocated by the operator to uniquely identify an operator's user database device; ABCD is the serial number, Assigned by operator user database.

IPAddress is the IP address assigned by the mobile network to the user when the mobile user uses the packet data service, and is used for accessing the packet data service. The user's IP address can be divided into a user's IPv4 address, a user's IPv6 address, and a user's IPv4v6 address according to different types of addresses used.

In the 2G/3G/4G mobile packet network, APN is used to indicate the external data network connected by the user using the packet data service. Among them, the APN consists of two parts: a network identifier and an operator identifier. The network identifier defines the external network that the user connects to, for example: uninet or 3gnet; the operator identifier defines the 2G/3G/4G mobile network that the user is in, for example: a typical operator identifier of China Unicom network is apn.epc.mnc001 .mcc460.3gppnetwork.org. So an example of a complete APN could be uninet.apn.epc.mnc001.mcc460.3gppnetwork.org.

In the embodiment of the present invention, the PCRF host name can be pcrf (number).<city abbreviation>.[province abbreviation].pcrf.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org; the PCEF host name can be pcrf(number).<city abbreviation>.[province abbreviation].pcef.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org. For example, the name of a PCRF host in Beijing can be named: pcrf01.bj.bj.pcrf.epc.mnc001.mcc460.3gppnetwork.org.

Taking user A as an example, the MSISDN of user A, that is, the mobile phone number is 8618601101234, the IMSI is 460011100612345, the IP address used by the user's current session is 172.16.11.123, and the APN accessed is uninet.apn.epc.mnc001.mcc460.3gppnetwork .org, the SessionID is session-id-01, the name of the bound PCRF host is pcrf02.bj.bj.pcrf.epc.mnc001.mcc460.3gppnetwork.org, and the name of the connected PCEF host is pcef01.bj.bj.pcef .epc.mnc001.mcc460.3gppnetwork.org, the PCRF binding information corresponding to the user's current session in the first database is shown in Table 2.

Table II

parameter User A Session ID session-id-01 IMSI 460011100612345 MSISDN 8618601101234 IP Address 172.16.11.123 APNs uninet.apn.epc.mnc001.mcc460.3gppnetwork.org PCRF Host pcrf02.bj.bj.pcrf.epc.mnc001.mcc460.3gppnetwork.org PCEF Host pcef01.bj.bj.pcef.epc.mnc001.mcc460.3gppnetwork.org

103. The first DRA sends a data synchronization request message to the second DRA through the data transmission channel.

Wherein, the data synchronization request message carries PCRF binding information.

In the embodiment of the present invention, the data synchronization request message sent by the first DRA to the second DRA through the data transmission channel may be a DSR-I (DataSynchronizationRequest-Initial, DRA data synchronization creation request) message, a DSR-U (DataSynchronizationRequest-Update, DRA Data Synchronization Update Request) message, or DSR-T (DataSynchronizationRequest-Termination, DRA Data Synchronization Termination Request) message. Among them, the PCRF binding information carried by the DSR-I message, the DSR-U message and the DSR-T message are not completely the same, and the content of the PCRF binding information carried by the DSR-I message, the DSR-U message and the DSR-T message respectively will be presented later.

104. The second DRA saves the PCRF binding information, so that the second DRA binds to the PCRF according to the PCRF binding information.

The second DRA may determine the PCRF bound to the first DRA according to the PCRFHost carried in the PCRF binding information, and bind to the PCRF, so that the first DRA and the second DRA are bound to the same PCRF.

An embodiment of the present invention provides a method for session binding. The first DRA receives the response message carrying the PCRF binding information sent by the PCRF, stores the PCRF binding information in the first database of the first DRA, and then transmits the The channel sends a data synchronization request message carrying PCRF binding information to the second DRA, and the second DRA stores the PCRF binding information. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. In the embodiment of the present invention, the PCRF binding information may be stored in the first database by setting the first database on the first DRA, and send the PCRF binding information to the first database through the data transmission channel. The second DRA is sent to ensure that the second DRA can obtain the PCRF binding information sent by the first DRA, so that the second DRA can bind to the PCRF according to the PCRF binding information, avoiding that DRA2 and DRA1 belong to different manufacturers, so that DRA2 may The corresponding relationship between the IMSI sent by DRA1 through the private interface, the user's IP address, and the PCRF cannot be recognized, so that DRA2 cannot successfully bind the PCRF. Therefore, it is ensured that DRA2 can bind to the PCRF bound to DRA1 according to the PCRF binding information sent by DRA1, so that DRA2 and DRA1 can be bound to the same PCRF.

In order to ensure that the first DRA sends an accurate data synchronization request message to the second DRA through the data transmission channel, the first DRA needs to judge the type of the received response message before sending the synchronization request message, and , to send data synchronization request messages with different contents. Therefore, in an implementation manner of the embodiment of the present invention, on the basis of the implementation manner shown in FIG. 1 , before executing step 103, the first DRA sends the data synchronization request message to the second DRA through the data transmission channel. Execute step 105, and step 103 can be specifically implemented as step 1031 as shown in Figure 2 or step 1032 as shown in Figure 3:

105. The first DRA determines the type of the response message according to the response message.

Wherein, the type of the response message includes: a session creation response message, a session update response message or a session termination response message.

In the embodiment of the present invention, when the response message is a CCA-I message, the type of the response message is a session creation response message; when the response message is a CCA-U message, the type of the response message is a session update response message; When the response message is a CCA-T message, the type of the response message is a session termination response message.

1031. When the type of the response message is a session creation response message or a session update response message, the first DRA sends a data synchronization request message to the second DRA through a data transmission channel.

Wherein, the data synchronization request message carries information identifier, message type, session identifier, IMSI, MSISDN, user's IP address, APN, PCRF host name and PCEF host name.

By step 105, when the type of the response message obtained is a session creation response message, the first DRA sends a DSR-I message to the second DRA; when the type of the response message obtained is a session update response message, the first DRA sends a message to the second DRA Send DSR-U message. It should be noted that both the DSR-I message and the DSR-U message carry information identifier, message type, session identifier, IMSI, MSISDN, user's IP address, APN, PCRF host name and PCEF host name. As shown in Table 3, it is the information carried in the DSR-I message; as shown in Table 4, it is the information carried in the DSR-U message.

Table three

Table four

1032. When the type of the response message is a session termination response message, the first DRA sends the information identifier, message type, and session identifier to the second DRA through the data transmission channel.

Through step 105, when the type of the response message obtained is a session termination response message, the first DRA sends a DSR-T message to the second DRA. It should be noted that the DSR-T message carries information identifier, message type and session identifier. As shown in Table 5, it is the information carried in the DSR-T message.

Table five

In the session binding method provided by the embodiment of the present invention, before the first DRA sends the data synchronization request message carrying the PCRF binding information to the second DRA through the data transmission channel, it is necessary to check the type of the response message sent by the PCRF. Judging, and sending data synchronization request messages with different contents to the second DRA according to the types of different response messages. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. The embodiment of the present invention can determine the data synchronization request message sent by DRA1 to DRA2 through the data transmission channel by judging the type of the response message sent by PCRF to DRA1. content. Therefore, it is ensured that in different application scenarios, DRA1 can send accurate data synchronization request messages to DRA2, so that DRA2 can bind to the data synchronization request message sent by DRA1 and carry the PCRF binding information. A specific PCRF, so that DRA2 and DRA1 are bound to the same PCRF.

In order to ensure that the data synchronization request message sent by the first DRA to the second DRA through the data transmission channel is successfully received by the second DRA, the second DRA needs to send the data synchronization request message to the second DRA through the data transmission channel after receiving the data synchronization request message sent by the first DRA. A DRA sends a data synchronization response message to prove that the second DRA has received the data synchronization request message carrying the PCRF binding information. Therefore, in an implementation manner of the embodiment of the present invention, on the basis of the implementation manner shown in FIG. 2 or FIG. 3 , the second DRA saves the PCRF binding information in step 104, so that the second DRA Before binding to the PCRF according to the PCRF binding information, step 106 can also be performed, as shown in Figure 4 or as shown in Figure 5:

106. The second DRA sends a data synchronization response message to the first DRA through the data transmission channel.

Wherein, the data synchronization response message carries an information identifier, a message type, a session identifier and a result parameter, and the result parameter is used to indicate whether the data synchronization request message is successfully processed by the second DRA.

When step 1031 or step 1032 is completed, the second DRA may send a data synchronization response message to the first DRA through the data transmission channel to notify the first DRA that the second DRA has received the data synchronization request message sent by the first DRA. It should be noted that the data synchronization response message carries information identifier, message type, session identifier and result parameters. As shown in Table 6, after the second DRA receives the DSR-I message sent by the first DRA, the information carried in the DSA-I (DataSynchronizationAnswer-Initial, DRA data synchronization creation response) message sent to the first DRA; As shown in Table 7, after the second DRA receives the DSR-U message sent by the first DRA, the information carried in the DSA-U (DataSynchronizationAnswer-Update, DRA data synchronization update response) message sent to the first DRA; as shown in the table 8 shows the information carried in the DSA-T (Data Synchronization Answer-Termination, DRA Data Synchronization Answer-Termination) message sent to the first DRA after the second DRA receives the DSR-T message sent by the first DRA.

Table six

Table Seven

table eight

In the session binding method provided by the embodiment of the present invention, before the second DRA saves the PCRF binding information, the second DRA needs to send different data to the first DRA through the data transmission channel according to the received different data synchronization request messages Synchronous response message. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. In the embodiment of the present invention, DRA2 can send a data synchronization response message to DRA1 through a data transmission channel to prove that DRA2 has received the PCRF binding sent by DRA1. Informational data synchronization request message. Therefore, it is ensured that the data synchronization request message sent by DRA1 to DRA2 through the data transmission channel is successfully received by DRA2, so that DRA2 can bind to the DRA1-bound DRA1 according to the data synchronization request message sent by DRA1 and carrying the PCRF binding information. PCRF, so that DRA2 and DRA1 bind to the same PCRF.

In an implementation manner of the embodiment of the present invention, the second DRA is provided with a second database, and the second database is used to store PCRF binding information. Therefore, on the basis of the implementation shown in FIG. 1 , it can also be implemented as the implementation shown in FIG. 6 . In step 104, the second DRA saves the PCRF binding information, so that the second DRA binds the PCRF binding information according to the PCRF binding information. Set to PCRF, can be specifically implemented as step 1041:

1041. The second DRA stores the PCRF binding information in a second database, so that the second DRA binds to the PCRF according to the PCRF binding information.

For example: when the first DRA is DRA1, the second DRA is DRA2, and the type of the response message sent by PCRF to DRA1 is a session creation response message, DRA2 and DRA1 perform the interaction of PCRF binding information synchronization during the PCC session creation process The process is shown in Figure 7, and the specific execution process is as follows:

201. When a VoLTE (VoiceoverLongTermEvolution, LTE-based voice service) terminal initiates a VoLTE call, the PCEF sends a CCR-I message to DRA1, wherein the CCR-I message carries at least SessionID, IMSI, MSISDN, IPAddress, APN, and PCEFHost;

202. DRA1 selects a PCRF for the VoLTE terminal according to the operator's network policy, and sends the CCR-I message to the PCRF;

203. The PCRF sends a CCA-I message to DRA1, wherein the CCA-I message at least carries the SessionID, the PCEFHost, and the PCRFHost of the PCRF to be bound;

204. By judging the type of the response message sent by the PCRF, when it is determined that the type of the response message is a session creation response message, extract the PCRF binding information of the newly created PCRF session, and store the PCRF binding information in the first database of DRA1 Among them, the PCRF binding information carries SessionID, IMSI, MSISDN, IPAddress, APN, PCRFHost and PCEFHost;

205. DRA1 sends a DSR-I message to another DRA2 deployed in the same area, where the DSR-I message carries PCRF binding information;

206. DRA2 extracts the PCRF binding information carried in the DSR-I message, and stores the PCRF binding information in the second database of DRA2;

207. DRA2 sends a DSA-I message to DRA1, where the DSA-I message carries a SessionID and a ResultCode whose value is success;

208. DRA1 sends a CCA-I message to PCEF;

209. When the VoLTE terminal sends SIP call control signaling on the established SIP (SessionInitiationProtocol, Session Initiation Protocol) signaling bearer, the AF sends an AAR (AuthenticationandAuthorizationRequest, authentication authorization request) message to DRA2, so that DRA2 sends the AAR message to Corresponding to PCRF, so as to realize that AF provides session information to PCRF according to the service requirements in SIP, wherein the AAR message carries IPAddress;

210. DRA2 searches for the PCRF binding information stored in the second database according to the IPAddress, so as to determine the corresponding PCRF;

211. DRA2 sends an AAR message to PCRF;

212. PCRF sends an AAA (Authentication and Authorization Answer, authentication and authorization response) message to DRA2;

213. DRA2 sends an AAA message to AF to complete the binding of the PCRF session, so that the VoLTE terminal's subsequent interface messages from Gx and interface messages from Rx are routed to the same PCRF until the PCC session is terminated.

Another example: when the first DRA is DRA1, the second DRA is DRA2, and the type of the response message sent by the PCRF to DRA1 is a session update response message, DRA2 and DRA1 perform PCRF binding information synchronization during the PCC session update process The interaction process is shown in Figure 8, and the specific execution process is as follows:

301. When the PCC session information of the VoLTE terminal changes, for example: when the VoLTE terminal changes the IPAdrress, the PCEF sends a CCR-U message to DRA1, wherein the CCR-U message carries at least SessionID, IMSI, MSISDN, IPAddress, APN and PCEFHost ;

302. DRA1 selects a PCRF for the VoLTE terminal according to the operator's network policy, and sends the CCR-U message to the PCRF;

303. The PCRF sends a CCA-U message to DRA1, wherein the CCA-U message carries at least SessionID, PCEFHost and PCRFHost;

304. By judging the type of the response message sent by the PCRF, when it is determined that the type of the response message is a session update response message, extract the PCRF binding information of the updated PCRF session, and update the PCRF binding in the first database of DRA1 Information, where the PCRF binding information carries SessionID, IMSI, MSISDN, IPAddress, APN, PCRFHost and PCEFHost;

305. DRA1 sends a DSR-U message to another DRA2 deployed in the same area, where the DSR-U message carries PCRF binding information;

306. DRA2 extracts the PCRF binding information carried in the DSR-U message, and updates the PCRF binding information in the second database of DRA2;

307. DRA2 sends a DSA-U message to DRA1, where the DSA-U message carries a SessionID and a ResultCode whose value is success;

308. DRA1 sends a CCA-U message to PCEF;

309. The AF sends an AAR message to DRA2, so that DRA2 sends the AAR message to the corresponding PCRF, so that the AF provides session information to the PCRF according to the service requirements in the SIP, wherein the AAR message carries the IPAddress;

310. DRA2 searches for the PCRF binding information stored in the second database according to the IPAddress, so as to determine the corresponding PCRF;

311. DRA2 sends an AAR message to PCRF;

312. The PCRF sends an AAA message to DRA2;

313. DRA2 sends an AAA message to AF to complete the binding of the PCRF session, so that the VoLTE terminal's subsequent interface messages from Gx and interface messages from Rx are routed to the same PCRF until the PCC session is terminated.

Another example: when the first DRA is DRA1, the second DRA is DRA2, and the type of the response message sent by the PCRF to DRA1 is a session termination response message, DRA2 and DRA1 perform PCRF binding information synchronization during the PCC session termination process The interaction process is shown in Figure 9, and the specific execution process is as follows:

401. When the PCC session of the VoLTE terminal needs to be terminated, for example: when the VoLTE terminal goes offline, the PCEF sends a CCR-T message to DRA1, wherein the CCR-T message carries at least a SessionID;

402. DRA1 selects the bound PCRF for the VoLTE terminal according to the PCRF binding information stored in the first database, and sends the CCR-T message to the PCRF;

403. The PCRF sends a CCA-T message to DRA1, wherein the CCA-I message carries at least a SessionID;

404. By judging the type of the response message sent by the PCRF, when it is determined that the type of the response message is a session termination response message, extract the SessionID carried in the PCRF binding information, and delete the PCRF binding information corresponding to the SessionID stored in the first database;

405. DRA1 sends a DSR-T message to another DRA2 deployed in the same area, where the DSR-T message carries a SessionID;

406. DRA2 extracts the SessionID carried in the DSR-I message, and deletes the PCRF binding information corresponding to the SessionID stored in the second database;

407. DRA2 sends a DSA-T message to DRA1, where the DSA-T message carries a SessionID and a ResultCode whose value is success;

408. The DRA1 sends a CCA-T message to the PCEF, so as to complete data synchronization between the first database and the second database during the PCC session termination process.

In a session binding method provided by an embodiment of the present invention, the first DRA receives the response message carrying the PCRF binding information sent by the PCRF, stores the PCRF binding information in the first database of the first DRA, and then passes the data The transmission channel sends a data synchronization request message carrying the PCRF binding information to the second DRA, and the second DRA saves the PCRF binding information to the second database. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. In the embodiment of the present invention, the PCRF binding information may be stored in the first database by setting the first database on the first DRA, and send the PCRF binding information to the first database through the data transmission channel. The second DRA is sent to ensure that the second DRA can obtain the PCRF binding information sent by the first DRA, so that the second DRA can bind to the PCRF according to the PCRF binding information, avoiding that DRA2 and DRA1 belong to different manufacturers, so that DRA2 may The corresponding relationship between the IMSI sent by DRA1 through the private interface, the user's IP address, and the PCRF cannot be recognized, so that DRA2 cannot successfully bind the PCRF. Therefore, it is ensured that DRA2 can bind to the PCRF bound to DRA1 according to the PCRF binding information sent by DRA1, so that DRA2 and DRA1 can be bound to the same PCRF.

An embodiment of the present invention provides a network system 50, as shown in FIG. 10 . The network system 50 is provided with a first routing proxy node DRA51, a second DRA52, and a policy and charging rule functional entity PCRF53, and the first DRA51 is provided with a first database for storing PCRF binding information.

The first DRA51 is configured to receive a response message sent by the PCRF53, where the response message carries PCRF binding information.

The first DRA51 is also used to acquire PCRF binding information and store it in the first database.

The first DRA51 is further configured to send a data synchronization request message to the second DRA52 through the data transmission channel, where the data synchronization request message carries PCRF binding information.

The second DRA52 is configured to save the PCRF binding information, so that the second DRA52 binds to the PCRF53 according to the PCRF binding information.

In an implementation manner of the embodiment of the present invention, the network system 50 is further provided with a policy and charging enforcement function entity PCEF54, a first DRA51, and is also used for:

According to the response message, the type of the response message is determined, and the type of the response message includes: a session creation response message, a session update response message or a session termination response message.

The first DRA51, also used for:

When the type of the response message is a session creation response message or a session update response message, the data synchronization request message is sent to the second DRA52 through the data transmission channel, and the data synchronization request message carries information identification, message type, session identification, international mobile subscriber identification code IMSI, mobile subscriber's integrated services digital network number MSISDN, subscriber's Internet Protocol IP address, access point name APN, PCRF host name and PCEF host name;

When the type of the response message is a session termination response message, send the information identifier, message type and session identifier to the second DRA52 through the data transmission channel.

In an implementation manner of the embodiment of the present invention, the second DRA is also used to:

Send a data synchronization response message to the first DRA through the data transmission channel. The data synchronization response message carries an information identifier, a message type, a session identifier and a result parameter. The result parameter is used to indicate whether the data synchronization request message is successfully processed by the second DRA.

In an implementation of the embodiment of the present invention, the second DRA52 is provided with a second database, the second database is used to store PCRF binding information, and the second DRA52 is specifically used for:

The PCRF binding information is stored in the second database, so that the second DRA52 binds to the PCRF53 according to the PCRF binding information.

In a network system provided by an embodiment of the present invention, the first DRA receives the response message carrying the PCRF binding information sent by the PCRF, stores the PCRF binding information in the first database of the first DRA, and then transmits the PCRF binding information to the first database through the data transmission channel. The second DRA sends a data synchronization request message carrying the PCRF binding information, and the second DRA stores the PCRF binding information. Compared with DRA1 and DRA2 belonging to the same manufacturer in the prior art, the corresponding relationship between IMSI, the user's IP address and PCRF is synchronized through a private interface, so that DRA2 can be used according to the Rx interface message, and the corresponding relationship between IMSI, user's IP address and PCRF. Determine the PCRF bound to DRA1, and bind DRA2 to the same PCRF. In the embodiment of the present invention, the PCRF binding information may be stored in the first database by setting the first database on the first DRA, and send the PCRF binding information to the first database through the data transmission channel. The second DRA is sent to ensure that the second DRA can obtain the PCRF binding information sent by the first DRA, so that the second DRA can bind to the PCRF according to the PCRF binding information, avoiding that DRA2 and DRA1 belong to different manufacturers, so that DRA2 may The corresponding relationship between the IMSI sent by DRA1 through the private interface, the user's IP address, and the PCRF cannot be recognized, so that DRA2 cannot successfully bind the PCRF. Therefore, it is ensured that DRA2 can bind to the PCRF bound to DRA1 according to the PCRF binding information sent by DRA1, so that DRA2 and DRA1 can be bound to the same PCRF.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, as for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to part of the description of the method embodiment.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. A method for session binding, the method is used in a network system, and the network system is provided with a first routing proxy node DRA, a second DRA and a policy and a charging rule functional entity PCRF, wherein the The first DRA is provided with a first database, and the first database is used to store PCRF binding information, and the method includes: The first DRA receives a response message sent by the PCRF, where the response message carries the PCRF binding information; The first DRA acquires the PCRF binding information and stores it in the first database; The first DRA sends a data synchronization request message to the second DRA through a data transmission channel, and the data synchronization request message carries the PCRF binding information; The second DRA saves the PCRF binding information, so that the second DRA binds to the PCRF according to the PCRF binding information. 2. The method according to claim 1, wherein the network system is further provided with a policy and charging enforcement function entity PCEF, and the first DRA sends data synchronization to the second DRA through a data transmission channel. Before requesting a message, include: The first DRA determines the type of the response message according to the response message, and the type of the response message includes: a session creation response message, a session update response message or a session termination response message; The first DRA sends a data synchronization request message to the second DRA through a data transmission channel, including: When the type of the response message is the session creation response message or the session update response message, the first DRA sends the data synchronization request message to the second DRA through the data transmission channel, the The data synchronization request message carries information identifier, message type, session identifier, International Mobile Subscriber Identity IMSI, mobile subscriber's integrated services digital network number MSISDN, subscriber's Internet Protocol IP address, access point name APN, PCRF host name and PCEF host name; When the type of the response message is the session termination response message, the first DRA sends the information identifier, the message type and the session identifier to the second DRA through the data transmission channel. 3. The method according to claim 2, wherein the second DRA saves the PCRF binding information so that the second DRA binds to the PCRF according to the PCRF binding information ,include: The second DRA sends a data synchronization response message to the first DRA through the data transmission channel, and the data synchronization response message carries the information identifier, the message type, the session identifier and the result parameter, and the The result parameter is used to indicate whether the data synchronization request message is successfully processed by the second DRA. 4. The method according to claim 1, wherein the second DRA is provided with a second database, the second database is used to store the PCRF binding information, and the second DRA saves the PCRF Binding information, so that the second DRA binds to the PCRF according to the PCRF binding information, including: The second DRA stores the PCRF binding information in the second database, so that the second DRA binds to the PCRF according to the PCRF binding information. 5. A network system, the network system is provided with a first routing proxy node DRA, a second DRA and a policy and charging rule functional entity PCRF, characterized in that the first DRA is provided with a first database, the The first database is used to store PCRF binding information, and the first DRA is used to receive a response message sent by the PCRF, the response message carrying the PCRF binding information; The first DRA is also used to acquire the PCRF binding information and store it in the first database; The first DRA is further configured to send a data synchronization request message to the second DRA through a data transmission channel, where the data synchronization request message carries the PCRF binding information; The second DRA is configured to save the PCRF binding information, so that the second DRA binds to the PCRF according to the PCRF binding information. 6. The network system according to claim 5, wherein the network system is further provided with a policy and charging enforcement function entity PCEF, and the first DRA is also used for: Determine the type of the response message according to the response message, where the type of the response message includes: a session creation response message, a session update response message, or a session termination response message; The first DRA is also used to: When the type of the response message is the session creation response message or the session update response message, send the data synchronization request message to the second DRA through the data transmission channel, and the data synchronization request message carries There are information identification, message type, session identification, International Mobile Subscriber Identity IMSI, Mobile Subscriber Integrated Services Digital Network Number MSISDN, Subscriber Internet Protocol IP Address, Access Point Name APN, PCRF Host Name and PCEF Host Name; When the type of the response message is the session termination response message, sending the information identifier, the message type and the session identifier to the second DRA through the data transmission channel. 7. The network system according to claim 6, wherein the second DRA is also used for: Send a data synchronization response message to the first DRA through the data transmission channel, the data synchronization response message carries the information identifier, the message type, the session identifier and a result parameter, and the result parameter is used for Indicates whether the data synchronization request message is successfully processed by the second DRA. 8. The network system according to claim 5, characterized in that, the second DRA is provided with a second database, the second database is used to store the PCRF binding information, and the second DRA specifically uses At: storing the PCRF binding information in the second database, so that the second DRA binds to the PCRF according to the PCRF binding information.