CN101447918B - Notification method of user equipment access protocol and system thereof - Google Patents

Abstract

The present invention discloses a method for notifying a user equipment access protocol, including: step S402, when it is determined that the user equipment accesses the network through a specific protocol, the access gateway allocates a care-of address to the user equipment, and sends the first session request message Set a specific attribute value pair to represent the care-of address, and send the first session request message to the policy and charging rule functional entity; step S404, the packet data network gateway assigns the home address to the user equipment, and the user equipment sends the care-of address and the home address Sent to the packet data network gateway; Step S406, the packet data network gateway sets a specific attribute value pair in the second session request message to represent the care-of address, uses a predetermined attribute value pair to represent the home address, and sends the session request message to the policy and Charging rule functional entity. In addition, the invention also discloses a notification system of user equipment access protocol.

Description

Notification method and system for user equipment access protocol

technical field

The present invention relates to the field of communications, and in particular, to a method and system for notifying user equipment access protocols.

Background technique

As shown in Figure 1, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) evolved packet system (Evolved Packet System, EPS) includes: evolved UTRAN (Evolved Universal Terrestrial Radio Access Network, E-UTRAN), mobile Management unit (Mobility Management Entity, MME), serving gateway (Serving Gateway, S-GW), data network gateway (Packet Data Network Gateway, PDN GW, namely, P-GW), home subscriber server (Home Subscriber Server, HSS) , 3GPP Authentication Authorization Accounting Server (3GPP AAA Server), Policy and Charging Rules Function (Policy and Charging Rules Function, PCRF), and other supporting nodes.

Among them, MME is responsible for mobility management, non-access stratum signaling processing, user mobility management context management and other control plane related work; S-GW is an access gateway device connected to E-UTRAN, between E-UTRAN and Data is forwarded between PDN GWs, and is responsible for caching paging waiting data. The P-GW is the border gateway between the 3GPP Evolved Packet System (EPS) and the PDN network, and is responsible for PDN access and data forwarding between EPS and PDN. PCRF interfaces with the operator's IP service network through the Rx interface to obtain service information, and is also connected to the gateway device in the network through S7/S7a/S7c, responsible for initiating the establishment of IP bearer, ensuring the QoS of service data, and performing charging control .

Moreover, EPS also supports interworking with non-3GPP networks. As shown in Figure 1, the intercommunication between the EPS and the non-3GPP network is realized through the S2a/b/c interface, and the P-GW serves as the anchor point between the 3GPP and the non-3GPP network. Among them, the non-3GPP system is divided into trusted non-3GPP IP access and untrusted non-3GPP IP access. Trusted non-3GPP IP access can directly interface with P-GW through S2a; untrusted non-3GPP IP access needs to be connected to P-GW through ePDG (Evolved Packet Data Gateway, evolved packet data gateway), ePDG and P-GW The interface between GWs is S2b. S2c is the interface between UE and P-GW, and adopts DSMIPv6 protocol to provide control and mobility management.

MIPv6 (Moblie IPv6) provides support for the reachability and continuity of the session when the MN moves in the network by binding the IPv6 care-of address CoA of the mobile node (MN) and the IPv6 home address HoA. However, because IPv6 has not been widely deployed, there will be a large number of IPv4 networks for a long period of time in the future. Therefore, the MN of IPv6 will often move to a network that does not support IPv6, so MIPv6 must be extended.

Dual Stack Mobile IPv6 (DSMIPv6) is a solution that can effectively solve this expansion problem. This solution is based on the Client-based MIP protocol and requires the mobile node MN and the home agent (Home Agent) Both need to support DSMIPv6. MNs supporting DSMIPv6 provide support for their mobility on IPv4 or IPv6 networks through the binding of their IPv4/IPv6 care-of address and IPv4/IPv6 home address.

In a traditional 3GPP network, the policy and charging enforcement function (PCEF, Policy and charging enforcement function) entity only exists in the P-GW, and the policy control and charging rules function (Policy Control and charging rules function, PCRF) entity only needs to The interface with the P-GW can complete the control of all functions, and the PCRF and the P-GW exchange information through the S7 interface, as shown in Figure 1. When the interface between P-GW and S-GW is based on Proxy Mobile IPv6 (Proxy Mobile IPv6, PMIPv6), the policy enforcement function part of the PCEF function also exists in the S-GW, which is called the bearer binding and event reporting function ( Bearer Binding and Event Reporting Function, BBERF) entity, S-GW and PCRF exchange information through the S7c interface, as shown in Figure 1. When accessing through the trusted non-3GPP access system, the BBERF entity also resides in the trusted non-3GPP access gateway. Moreover, as shown in FIG. 1 , information is exchanged between the trusted non-3GPP access gateway and the PCRF through the S7a interface. When the UE roams, the S9 interface serves as the interface of the home PCRF and the visited PCRF. At the same time, the application function (Application Function, AF) entity that provides services for the UE sends service information for generating policy and charging control (Policy and Charging Control, PCC) to the PCRF through the Rx+ interface. Here, the S7, S7a, S7c, and Rx+ interfaces all adopt the Diameter protocol.

Fig. 2 is a processing flow of UE switching from 3GPP to a trusted non-3GPP access network and using DSMIPv6 protocol to access. Through this process, the UE can establish an IP connection to the Packet Data Network (PDN), and at the same time establish a DSMIPv6 tunnel between the UE and the P-GW, on which the non-3GPP access gateway can be trusted . As shown in Figure 2, the specific processing process is as follows:

202. A radio access bearer is established between the UE and the S-GW, and a PMIPv6 tunnel is established between the S-GW and the P-GW;

204. The UE discovers a trusted non-3GPP access system and initiates a handover;

206. The UE performs access authentication in the non-3GPP access system, and the Home Subscriber Server/Authentication Authorization and Accounting Server (HSS/AAA) performs access authentication on the UE, and returns to the trusted non-3GPP access gateway in the 3GPP system The address of the P-GW to which the UE is connected;

208. After the authentication is successful, a layer 3 connection between the UE and the trusted non-3GPP access system is established, and the access network assigns a local IP address to the UE as the CoA of the DSMIPv6 care-of address;

210. The trusted non-3GPP access gateway sends a "gateway control session establishment" request to the PCRF, and the message carries the network access identifier NAI and the care-of address CoA. At this time, since there is only the CoA of the UE, and the CoA is provided by the trusted non-3GPP system Assigned, so there is no information on the PCRF that the UE wants to access the PDN, and the PDN-based QoS policy cannot be issued;

212. The PCRF returns "Gateway Control Session Establishment Confirmation", and the message carries the QoS policy;

214. The UE performs a DNS query according to the APN to obtain the IP address of the P-GW to be accessed, and establishes a security association between the UE and the P-GW, and the UE obtains the home address HoA;

216. The UE sends a "binding update" request to the P-GW, and the message carries HoA and CoA;

218. The P-GW interacts with the PCRF to modify the IP Connectivity Access Network (IP-CAN) session;

220. The P-GW returns a binding confirmation;

222. The PCRF sends a gateway control and QoS rule provision message to the trusted non-3GPP access gateway. The message carries QoS rules and MIP encapsulation information, and the trusted non-3GPP access gateway installs the QoS rule, wherein the QoS rule is based on PDN information ;

224. The non-3GPP access network can be trusted to implement a specific policy enforcement mechanism;

226. The trusted non-3GPP access gateway returns the gateway control and QoS rules to provide a confirmation message;

228. A DSMIPv6 tunnel is established between the UE and the P-GW, and the UE can send or receive IP data packets.

Fig. 3 is a processing flow of UE switching from 3GPP to a trusted non-3GPP access network and using PMIPv6 protocol to access. Through this process, the UE can establish an IP connection to the PDN, and can also establish a PMIPv6 tunnel between the trusted non-3GPP access network and the P-GW. As shown in Figure 3, the specific steps are as follows:

302. Establish a radio access bearer between the UE and the S-GW, and establish a PMIPv6 tunnel between the S-GW and the P-GW;

304. The UE discovers a trusted non-3GPP access system and initiates a handover;

306. The UE performs access authentication in the non-3GPP access system, and the HSS/AAA performs access authentication for the UE, and returns the address of the P-GW to which the UE is connected in the 3GPP system to the trusted non-3GPP access gateway;

308. Trigger the attachment process of layer 3;

310. The trusted non-3GPP access gateway sends a gateway control session establishment request message to the PCRF, wherein the message carries the network access identifier NAI and the IP address, and the PCRF delivers the QoS policy, since the IP address is allocated by the P-GW Therefore, the address contains the information that the UE will access the PDN, and the QoS policy issued by the PCRF is based on the PDN;

312. The PCRF returns the gateway control session establishment confirmation, and the message carries the QoS policy;

314. The trusted non-3GPP access gateway sends a proxy binding update message to the P-GW;

316. The P-GW interacts with the PCRF to modify the IP-CAN session;

318. The P-GW returns a proxy binding confirmation to the trusted non-3GPP access gateway;

320. Layer 3 attachment is completed;

322. The PMIPv6 tunnel between the trusted non-3GPP access gateway and the P-GW is established, and the UE can send or receive IP data packets.

It can be seen from the above two attach processing procedures that when the UE adopts DSMIPv6, the functions and procedures performed by the PCRF are different from those performed when the UE adopts the PMIPv6 protocol.

When the DSMIPv6 protocol is adopted, when the PCRF receives the establishment of a gateway control session, the policy rules issued by the PCRF are not based on the PDN information that the UE will access, and after the interaction between the PCRF and the PCEF, the policy rules issued by the PCRF will be issued based on the information that the UE will access. Send the policy control rules of incoming PDN information to BBERF. On the other hand, when the PMIPv6 protocol is adopted, when the PCRF receives the establishment of the gateway control session, the policy rule issued by the PCRF is based on the PDN information that the UE will access.

In addition, when the UE adopts the DSMIPv6 protocol, PCRF should provide MIP encapsulation information in addition to the usual service data flow filter, so that BBERF can correctly filter data packets. In the current related technology, the gateway control session establishment and the gateway control session establishment confirmation message are implemented by using the Diameter application protocol. The IP address of the UE is carried by Attribute Value Pairs (AVP) in the Diameter application protocol, and its attribute names are Framed-IP-Address (this attribute value pair is mainly used to carry IPv4 addresses) and Framed-IPv6 -Prefix (this attribute-value pair is mainly used to carry IPv6 address prefix). AVP is a unit used to carry information in the Diameter protocol. Its format usually includes AVP code, AVP flag, AVP length, and AVP data value. Among them, the AVP code is used to identify the attribute of the AVP, which corresponds to the attribute name and is assigned by IANA; the AVP tag is to inform the receiver how to handle this attribute; the AVP length indicates the length of the AVP and the AVP data value indicates that the AVP carries The value of the data.

If the CoA of the UE when accessing using the DSMIPv6 protocol and the IP address when accessing using PMIPv6 are both carried by the AVP of Framed-IP-Addres or Framed-IPv6-Prefix, then when the PCRF receives the gateway control session establishment message, it cannot Judging whether the UE adopts the DSMIPv6 protocol or the PMIPv6 protocol, it cannot decide which process and function to start.

Aiming at this problem, a solution that has been proposed so far is to introduce the parameter Mobility Protocol Type (MPT), and carry it in the gateway control session establishment and IP-CAN session establishment instruction or IP-CAN session modification message This parameter is used to indicate that the UE uses PMIPv6 or DSMIPv6 to access. However, to realize this solution, new parameters need to be added in the gateway control session establishment and IP-CAN session establishment instruction or IP-CAN session modification message, which will increase the burden of the system.

At present, no technical solution capable of effectively notifying the user equipment of the access protocol has been proposed.

Contents of the invention

The present invention is made in consideration of the above-mentioned problems. Therefore, the main purpose of the present invention is to provide a notification mechanism of user equipment access protocol to solve the problem that the mobility management protocol adopted by the user equipment cannot be notified to the policy control in the related art. and charging rule functional entities.

According to an embodiment of the present invention, a method for notifying a user equipment access protocol is provided, which is applied to a policy and charging rule functional entity, a packet data network gateway, an access gateway, a home user server/authentication authorization and charging server Evolved packet system.

The method includes: step S402, when it is determined that the user equipment accesses the network through a specific protocol, the access gateway allocates a care-of address to the user equipment, sets a specific attribute-value pair in the first session request message to represent the care-of address, and sends The first session request message is sent to the policy and charging rule functional entity, and the policy and charging rule functional entity judges that the user equipment adopts the DSMIPv6 protocol according to the specific attribute value set in the first session request message; step S404, packet data The network gateway assigns a home address to the user equipment, the user equipment sends the care-of address and the home address to the packet data network gateway, and the policy and charging rule function entity judges the user equipment according to the specific attribute value set in the second session request message Adopt the DSMIPv6 protocol; step S406, the packet data network gateway sets a specific attribute value pair in the second session request message to represent the care-of address, uses a predetermined attribute value pair to represent the home address, and sends the second session request message to the policy and planner Fee rules functional entity.

Wherein, the care-of address allocated by the access gateway is the subnet prefix of the IPv6 address and/or the IPv4 address. The care-of address indicated by the specific attribute-value pair in the first session request message is the subnet prefix of the IPv6 address or the IPv4 address. In addition, the home address is the subnet prefix of the IPv6 address and/or the IPv4 address.

Wherein, the first session request message is a gateway control session establishment request message, and the second session request message is an IP-CAN session establishment instruction message or an IP-CAN session modification message.

In addition, before step S402, it may further include: after the user equipment layer 2 accesses the network, the home user server/authentication, authorization and accounting server performs access authentication and authorization on the user equipment; The user equipment is connected to layer 3 of the access gateway; the user equipment negotiates with the access gateway, and determines the access protocol of the user equipment.

After step S406, it may further include: the policy and charging rule functional entity issues gateway control rules and service quality rules to the access gateway; the access gateway performs subsequent processing according to the gateway control rules and service quality rules, and sends a The fee rule functional entity returns a confirmation message; a tunnel is established between the user equipment and the packet data network gateway to transmit data.

In addition, the above specific protocol is the DSMIPv6 protocol.

According to another embodiment of the present invention, a system for notifying user equipment access protocols is provided.

The system includes: a setting module, configured to set specific attributes in the first session request message and the second session request message when it is determined that the user equipment accesses the network through a specific protocol, and the access gateway allocates a care-of address to the user equipment A value pair, wherein the specific attribute value pair is used to carry the care-of address; the sending module is used to send the first session request message from the access gateway to the policy and charging rule functional entity, and the policy and charging rule functional entity according to The specific attribute value set in the first session request message determines that the user equipment adopts the DSMIPv6 protocol, and after the user equipment obtains the home address from the packet data network gateway, sends the home address and the care-of address from the user equipment to the packet data network gateway, and send the second session request message from the packet data network gateway to the policy and charging rule functional entity, and the policy and charging rule functional entity judges the The user equipment adopts the DSMIPv6 protocol, wherein the second session request message includes the home address.

Wherein, the care-of address assigned by the access gateway is the subnet prefix and/or IPv4 address of the IPv6 address; the care-of address represented by the specific attribute value pair in the first session request message is the subnet prefix or the IPv4 address of the IPv6 address; The home address is the subnet prefix of the IPv6 address and/or the IPv4 address.

Through the above-mentioned technical solution of the present invention, it is possible to notify the PCRF of the protocol when the user accesses without adding parameters to the gateway control session establishment and IP-CAN session establishment instruction or IP-CAN session modification message, thereby facilitating Execution of subsequent processing.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a block diagram of an EPS system in a non-roaming situation according to the related art;

Fig. 2 is a process signaling flow chart of switching from 3GPP to a trusted non-3GPP IP access system and using DSMIPv6 protocol access according to related technologies;

Fig. 3 is the signaling flow chart of the attachment process of switching from 3GPP to a trusted non-3GPP IP access system and using PMIPv6 protocol access according to related technologies;

4 is a flowchart of a method for notifying a user equipment access protocol according to a method embodiment of the present invention;

Fig. 5 is a signaling flowchart of a processing example of a method for notifying a user equipment access protocol according to a method embodiment of the present invention; and

Fig. 6 is a block diagram of a notification system of a user equipment access protocol according to a system embodiment of the present invention.

Detailed ways

method embodiment

In this embodiment, a method for notifying a user equipment access protocol is provided, which is applied to a system including a policy control and charging rule functional entity, a packet data network gateway, an access gateway, and a home user server/authentication, authorization and charging server Evolved packet system.

As shown in FIG. 4 , the method for notifying user equipment access protocols according to this embodiment includes: step S402, when it is determined that the user equipment accesses the network through a specific protocol, the access gateway assigns a care-of address to the user equipment. A specific attribute value pair is set in a session request message to represent the care-of address, and the first session request message is sent to the policy and charging rule functional entity; Step S404, the packet data network gateway assigns a home address to the user equipment, and the user equipment will forward The address and the home address are sent to the packet data network gateway; step S406, the packet data network gateway sets a specific attribute value pair in the second session request message to represent the care-of address, uses a predetermined attribute value pair to represent the home address, and sends the session request message Sent to the policy and charging rule functional entity.

Wherein, the care-of address allocated by the access gateway is the subnet prefix of the IPv4 address and/or the IPv6 address. The care-of address indicated by the specific attribute-value pair in the first session request message is the subnet prefix of the IPv4 address or the IPv6 address. In addition, the home address is a subnet prefix of the IPv4 address and/or the IPv6 address.

Wherein, the first session request message is a gateway control session establishment request message, and the second session request message is an IP-CAN session establishment indication message or an IP-CAN session modification message.

In addition, before step S402, it may further include: after the user equipment layer 2 accesses the network, the home user server/authentication, authorization and accounting server performs access authentication and authorization on the user equipment; The user equipment is connected to layer 3 of the access gateway; the user equipment negotiates with the access gateway, and determines the access protocol of the user equipment.

After step S406, it may further include: the policy and charging rule functional entity issues gateway control rules and service quality rules to the access gateway; the access gateway performs subsequent processing according to the gateway control rules and service quality rules, and sends a The fee rule functional entity returns a confirmation message; a tunnel is established between the user equipment and the packet data network gateway to transmit data.

In addition, the above specific protocol is the DSMIPv6 protocol.

That is to say, this method adds a pair of attribute-value pairs (Attribute-Value-Pair, AVP) in the Diameter application protocol supported on the S7 and S7a interfaces, which are used to carry the care-of address CoA when the UE adopts DSMIPv6 access. IPv4 address or IPv6 address prefix. When the gateway control session and the IP-CAN session establishment indication received by the PCRF carry one or a pair of the newly added AVPs, the PCRF can determine that the UE is accessed using DSMIPv6, and then execute the corresponding follow-up procedures .

Among them, in the gateway control session establishment message and the IP-CAN session establishment instruction message, the newly added AVP (that is, the above-mentioned specific attribute value, which can be named: CoA-IP-Address) is used to carry the trusted non-3GPP IP interface Enter the IPv4 address of the care-of address allocated by the system for the UE, and use the original Framed-IPv6-Prefix (that is, the above-mentioned specific attribute value) to carry the subnet prefix of the home address IPv6. Specifically, the gateway control session establishment message added with the above AVP is as follows,

In addition, the format of the IP-CAN session establishment instruction message added with the above AVP is as follows:

Among them, in the above two messages, the information in curly brackets ("{}") is necessary, and the information in square brackets ("[]") is not absolutely necessary, and the position is not fixed, and the information with The number of information with an asterisk ("*") can be 0 or more, and the information without an asterisk can be 0 or 1. Specifically, in the gateway session establishment request message, there can be no [ CoA-IPv6-Prefix].

The signaling flow chart of this embodiment is shown in Figure 5, and each step is described as follows:

502. The user equipment performs layer 2 access, and the HSS/AAA performs access authentication and authorization on the UE;

504. After the authentication is successful, a layer 3 connection between the UE and the trusted non-3GPP access system is established, and the UE negotiates with the trusted non-3GPP access gateway, and decides to use the DSMIPv6 protocol for access, and the trusted non-3GPP access gateway is the UE Assign an IPv4 care-of address, assuming the care-of address is 202.119.9.10;

506. The trusted non-3GPP access gateway sends a gateway control session establishment message to the PCRF. The newly added AVP is used in the Diameter application protocol adopted by the message, that is, CoA-IP-Address can be used to carry the care-of address 202.119.9.10, wherein, The message format of the gateway control session establishment can be the format shown before;

508. The PCRF judges that the UE adopts DSMIPv6 according to the newly added AVP and CoA-IP-Address, and issues a QoS policy irrelevant to the PDN to be accessed to the trusted non-3GPP access gateway;

510. The UE performs DNS query according to the APN to obtain the IP address of the P-GW to be accessed, and establishes a security association between the UE and the P-GW, and the UE obtains the home address HoA;

512. The UE sends a "binding update" request to the P-GW, and the message carries HoA and CoA;

514. The P-GW sends an IP-CAN session establishment instruction message to the PCRF. The message uses the newly added AVP in the Diameter application protocol, that is, the CoA-IP-Address to carry the care-of address 202.119.9.10, and uses the existing AVP (Framed -IPv6-Prefix) to carry the subnet prefix 2000::1/64 of the home address IPv6, the PCRF sends the corresponding PCC policy to the P-GW, and the format of the IP-CAN session establishment indication message can be the format shown before;

516. The P-GW returns a binding confirmation to the UE;

518. Since the UE is accessed using the DSMIPv6 protocol, the PCRF sends a gateway control and QoS rule provision message to the trusted non-3GPP access gateway, issues the QoS policy and event trigger related to the PDN to be accessed, and simultaneously issues the encapsulation information;

520. The trusted non-3GPP access network executes a specific policy enforcement mechanism;

522. The trusted non-3GPP access gateway returns a gateway control and QoS rule to provide a confirmation message;

524. A DSMIPv6 tunnel is established between the UE and the P-GW, and the UE can send or receive IP data packets.

System embodiment

In this embodiment, a system for notifying user equipment access protocols is provided.

As shown in FIG. 6, the notification system of user equipment access protocol according to this embodiment includes: a setting module 602, which is used to determine that the user equipment accesses the network through a specific protocol, and the access gateway assigns a care-of address to the user equipment Next, set a specific attribute-value pair in the first session request message and the second session request message, wherein the specific attribute-value pair is used to carry the care-of address; the sending module 604 is configured to send the first session request message from the access gateway To the policy and charging rules functional entity, and after the user equipment obtains the home address from the packet data network gateway, send the home address and the care-of address from the user equipment to the packet data network gateway, and send the second session request message from the packet data network gateway The gateway sends to the policy and charging rule function entity, wherein the second session request message includes the home address.

Wherein, the care-of address assigned by the access gateway is the subnet prefix of the IPv4 address and/or the IPv6 address; the care-of address represented by the specific attribute value pair in the first session request message is the subnet prefix of the IPv4 address or the IPv6 address; The home address is the subnet prefix of the IPv4 address and/or IPv6 address.

In summary, with the help of the technical solution of the present invention, the protocol when the user accesses can be notified to PCRF, thereby facilitating the execution of subsequent processing.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. the Notification Method of a user equipment access protocol, be applied to comprise the evolved packet system of "Policy and Charging Rules Function entity, grouped data network gateway, IAD and home subscriber server/authentication and authorization charging server, it is characterized in that described method comprises:

Step S402, pass through under the situation of DSMIPv6 agreement access network at definite described subscriber equipment, described IAD is to described user equipment allocation Care-of Address, particular attribute-value is set to representing described Care-of Address in first conversation request message, and described first conversation request message sent to the "Policy and Charging Rules Function entity, wherein, described first conversation request message is that gateway control session is set up request message;

Described "Policy and Charging Rules Function entity judges that according to the particular attribute-value that is provided with in described first conversation request message described subscriber equipment adopts the DSMIPv6 agreement;

Step S404, grouped data network gateway are described user equipment allocation home address, and described subscriber equipment is sent to described grouped data network gateway with described Care-of Address and described home address;

Step S406, described grouped data network gateway is provided with described particular attribute-value to representing described Care-of Address in second conversation request message, with the predetermined attribute value to representing home address, and described second conversation request message sent to described "Policy and Charging Rules Function entity, wherein, described second conversation request message is that Indication message or IP-CAN session modification message are set up in the IP-CAN session;

Described "Policy and Charging Rules Function entity judges that according to the particular attribute-value that is provided with in described second conversation request message described subscriber equipment adopts the DSMIPv6 agreement.

2. method according to claim 1 is characterized in that, the described Care-of Address that is distributed by described IAD is the subnet prefix and/or the IPv4 address of IPv6 address.

3. method according to claim 1 is characterized in that, in described first conversation request message by described particular attribute-value to the expression described Care-of Address be the subnet prefix or the IPv4 address of IPv6 address.

4. method according to claim 1 is characterized in that, described home address is the subnet prefix and/or the IPv4 address of IPv6 address.

5. method according to claim 1 is characterized in that, before described step S402, further comprises:

After described user equipment layer 2 inserted described network, home subscriber server/authentication and authorization charging server carried out the access authentication mandate to described subscriber equipment;

Under the situation that described access authentication mandate is passed through, set up described subscriber equipment and be connected with the layer 3 of described IAD;

Described subscriber equipment and described IAD are held consultation, and determine the access protocol of described subscriber equipment.

6. method according to claim 1 is characterized in that, after described step S406, further comprises:

Described "Policy and Charging Rules Function entity issues gateway control rule and rules for quality of service to described IAD;

Described IAD carries out subsequent treatment according to described gateway control rule and described rules for quality of service, and returns acknowledge message to described "Policy and Charging Rules Function entity;

Between described subscriber equipment and described grouped data network gateway, set up the tunnel with the transmission data.

7. the reporting system of a user equipment access protocol is characterized in that, comprising:

Module is set, be used at definite subscriber equipment by DSMIPv6 agreement access network, and under the situation of IAD to described user equipment allocation Care-of Address, it is right in first conversation request message and second conversation request message particular attribute-value to be set, wherein, described particular attribute-value is to being used to carry described Care-of Address, described first conversation request message is that gateway control session is set up request message, and described second conversation request message is that Indication message or IP-CAN session modification message are set up in the IP-CAN session;

Sending module, be used for described first conversation request message is sent to the "Policy and Charging Rules Function entity from IAD, described "Policy and Charging Rules Function entity judges that according to the particular attribute-value that is provided with in described first conversation request message described subscriber equipment adopts the DSMIPv6 agreement, and after described subscriber equipment obtains home address from grouped data network gateway, described home address and described Care-of Address are sent to described grouped data network gateway from described subscriber equipment, and described second conversation request message is sent to described "Policy and Charging Rules Function entity from described grouped data network gateway, described "Policy and Charging Rules Function entity judges that according to the particular attribute-value that is provided with in described second conversation request message described subscriber equipment adopts the DSMIPv6 agreement, wherein, comprise described home address in described second conversation request message.

8. system according to claim 7 is characterized in that, the described Care-of Address that is distributed by described IAD is the subnet prefix and/or the IPv4 address of IPv6 address; In described first conversation request message by described particular attribute-value to the expression described Care-of Address be the subnet prefix or the IPv4 address of IPv6 address; Described home address is the subnet prefix and/or the IPv4 address of IPv6 address.

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