WO2010108349A1

WO2010108349A1 - Implementation method, system and mobile node for accessing the static home agent

Info

Publication number: WO2010108349A1
Application number: PCT/CN2009/073569
Authority: WO
Inventors: 朱春晖; 宗在峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-03-24
Filing date: 2009-08-27
Publication date: 2010-09-30
Also published as: CN101754175A

Abstract

Implementation method, system and mobile node for accessing the static Home Agent (HA) are provided by the invention. A network device notifies a mobile node of the Internet Protocol (IP) address of its static home agent and the static home agent indication, the IP address of the static home agent is stored in the mobile node; when the mobile node initiates the connection again, it can establishes a security association and a binding relationship with the static home agent directly according to the stored IP address of the static home agent, avoiding the process of performing HA transformation or querying the IP address of HA when the mobile node connects to the network again, decreasing the load of the network and UE, and accelerating the speed of accessing a service by UE.

Description

Implementation method, system and mobile node of static home agent access

Technical field

The present invention relates to the field of communications, and in particular to an implementation method, system, and mobile node for static home agent access.

Background technique

The Mobile IP protocol is a network layer solution that provides mobility on the Internet, so that nodes do not interrupt ongoing communications while switching links. In particular, Mobile IP provides an IP routing mechanism that allows mobile nodes to be accessed through their home address when accessing a foreign link. The schematic diagram of the MIPv6 application scenario shown in Figure 1 is mainly composed of an HA (Home Agent), an Access Network, an Access Router, and a MN (Mobile Node).

The following is an important term for mobile IP:

Mobile Node: A node in a mobile IP that can be moved from a connection point of one link to another, while still being accessible through its home address.

Home Agent (HA): Refers to a router on the link of the mobile node's hometown. When the mobile node leaves the home link, it can intercept the data packet whose destination address on the home link is the home address of the mobile node, and forward it to the care-of address of the mobile node through the tunnel.

Home Address (HoA): Refers to the permanent IP address assigned to the mobile node, belonging to the home link of the mobile node. The standard IP routing mechanism sends packets addressed to the mobile node's home address to its home link.

Care-of Address (CoA): Refers to the IP address obtained when the mobile node accesses the foreign link. The subnet prefix of this IP address is the foreign subnet prefix.

Binding: The association between the MN's IPv6 home network prefix and/or the IPv4 home address and the CoA.

HA is the home agent of MN, which is the topology anchor of MN's home network prefix, and manages the binding state of MN. Each binding state corresponds to BCE managed by HA (Binding Cache) Entry, binding cache entry), the content of the BCE is: mobile node identifier (MN Identifier) and the IPv6 home network prefix and/or IPv4 home address currently used by the MN, when the MN accesses the EPS network (Evolved Packet System, evolved In the packet system) (Fig. 2), the BCE also includes the currently used service information (Access Point Name). The HA can intercept the data packet of the IPv6 home network prefix or the IPv4 home address whose destination address is MN, and forward it to the care-of address of the MN registered in the BCE.

In Figure 1, when the MN is connected to the initial HA, the initial HA needs to migrate the MN to the target HA for some reason. The reason may be: The initial HA load is too high. At this time, the initial HA needs to send the IP address of the target HA and the indication of converting the HA to the MN. After receiving the indication, the MN cancels the connection at the initial HA and initiates the connection to the target HA.

When the UE (User Equipment) is used as a mobile node (MN) to access the EPS network through a non-3GPP (non-3GPP) access network (as shown in Figure 2), the dual stack mobile IP protocol version 6 (Dual Stack ΜΙΡνό, DS-MIPv6) is used to keep the user's IP address unchanged to maintain user service continuity. At this time, the P-GW (PDN GW, Packet Data Network Gate Way, Packet Data Network Gateway) has the function of HA. A trusted non-3GPP access network or an evolved packet data gateway (ePDG) will assign a Care-of Address (CoA) to the UE. When the UE uses the mobility service, the UE initiates the Internet Key Exchange Version 2 (IKEv2) and the HA to establish a security association. The HA allocates an IP address (HoA) to the UE and sends the address to the UE.

Figure 2 is a diagram of the EPS system architecture. In order to maintain the strong competitiveness of third-generation mobile communication systems in the field of mobile communications, it is necessary to improve their network performance and reduce network construction and operating costs. Therefore, the 3GPP (3rd Generation Partnership Project) standardization working group is currently working on the next generation evolution of the core network system - EPC (Evolved Packet Core), with the aim of Users provide higher transmission rates, shorter networks, and access to evolved universal terrestrial radio access networks; EPC systems support non-3GPP access networks, and WiMAX (Worldwide Interoperability for Microwave Access) Access) access network.

As shown in FIG. 2, when the UE is in a non-roaming situation, the UE accesses the EPC through a non-3GPP access network (including a trusted and untrusted non-3GPP access network). The network elements in the figure also include: MME (Mobility Management Entity, Mobile Management Unit), S-GW (Serving Gateway), P-GW, HSS (Home Subscriber Server, Home Subscriber Server), 3GPP AAA Server (3GPP Authentication and Authorization Accounting Server), and ePDG ( Evolved Packet Data Gateway, an evolved packet data gateway).

The non-3GPP access network shown in Figure 2 includes the following two types:

Trusted Non 3GPP Access: There is a trust relationship between the 3GPP network and the non-3GPP access system, and the non-3GPP access system can directly access the P-GW.

Untrusted Non 3GPP Access (Untrusted Non 3GPP Access): There is no trust relationship between the 3GPP network and the non-3GPP access system. The non-3GPP access system must first access the ePDG of the 3GPP network and then access the P- GW. At this time, a secure tunnel is established between the UE and the ePDG to ensure secure transmission of data between the UE and the 3GPP network.

When the static IP address and static P-GW required for the UE to access a certain service (identified by the APN) are stored in the HSS, the UE needs to connect to the static P-GW to obtain the corresponding static IP address. The initial P-GW to which the UE initiates connection may not be the static P-GW. At this time, the initial P-GW acquires the IP address of the static P-GW from the HSS, and notifies the UE of the IP address. The method of notification can be:

1. The initial P-GW sends the IP address of the static P-GW and the HA conversion indication to the UE through the HA conversion message;

2. During the bootstrapping process initiated by the UE to the initial P-GW, the initial P-GW notifies the UE: HA redistribution (ie, HA conversion) and the IP address of the static P-GW.

After obtaining the IP address of the static P-GW, the UE initiates a connection to the static P-GW to obtain a static IP address.

However, when the UE needs to access the service again after disconnecting the service connection, it also needs to go through a HA conversion process, which will bring unnecessary between the UE and the initial HA, and between the initial HA and the HSS/AAA. Signaling interaction, extending the time of the UE's access service.

The way in which the UE obtains the home agent (HA) address, that is, the P-GW address, is as follows:

1. PCO (Protocol Configuration Option) sent by P-GW or GGSN (GPRS Gateway Service Node) when attached to the 3GPP network Option);

2. Interact through IKEv2 when establishing a tunnel to ePDG;

3. Interact through DHCP (Dynamic Host Configuration Protocol);

4. Query through DNS (Domain Name System, i or name system).

Similarly, in the above four modes, when the UE needs to access the service again after disconnecting the service connection, an HA conversion process is required.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method, system and mobile node for implementing static home agent access, so as to effectively speed up the access of the mobile node to the service.

To solve the above technical problem, the present invention provides a method for implementing static home agent access, and the method includes:

(a) the network device notifying the mobile node of the IP address of the home agent and the static home agent indication, wherein the static home agent indication is used to indicate that the home agent is a static home agent;

(b) the mobile node saves the IP address of the home agent, that is, the IP address of the static home agent;

(c) The mobile node establishes a connection with the static home agent based on the saved IP address of the static home agent.

Further, the network device is one of the following: a packet data network gateway P-GW, a GPRS gateway service node GGSN, an evolved packet data gateway ePDG, a dynamic host configuration protocol server DHCP server, and a domain name system server DNS Server.

Further, when the function of the home agent is implemented by the packet data network gateway P-GW, the IP address of the static home agent refers to the IP address of the static P-GW, and the mobile node in step (b) is also saved. Corresponding relationship between the IP address of the static P-GW and the service identifier of the current service, so that the mobile node obtains the IP address of the corresponding static P-GW according to the service identifier, and further establishes a connection with the corresponding static home agent. . Further, when the function of the home agent is implemented by the packet data network gateway P-GW, the mobile node is further configured to check whether the IP address of the corresponding static P-GW is saved according to the service identifier of the current service, thereby Establish a connection with the corresponding static home agent according to the saved IP address of the static P-GW

The present invention also provides an implementation system for static home agent access, the system comprising a network device and a mobile node, wherein:

The network device is configured to notify the mobile node of the home agent's IP address and the static home agent indication, wherein the static home agent indication is used to indicate that the home agent is a static home agent; the mobile node is configured to receive the network device notification The IP address of the home agent and the static home agent indication, and save the IP address of the home agent, that is, the IP address of the static home agent; the mobile node is further set to be based on the saved IP address of the static home agent, The static home agent establishes a connection.

Further, the mobile node is further configured to check whether it has an IP address of the static home agent stored to establish a connection directly with the static home agent that holds the IP address.

Further, when the function of the home agent is implemented by the packet data network gateway P-GW, the IP address of the static home agent refers to the IP address of the static P-GW; and the mobile node saves the static P-GW. The IP address is further set to save the correspondence between the IP address of the static P-GW and the service identifier of the current service; the mobile node is further configured to check whether the corresponding static is saved according to the service identifier of the current service. IP address of the P-GW.

Further, the network device is further configured to query the information saved by itself, or obtain it from the outside, and obtain the IP address of the home agent and whether the home agent is a static home agent.

The invention also provides a mobile node for accessing a static home agent,

The mobile node is configured to receive an IP address of a home agent notified by the network device and a static home agent indication, where the static home agent indication is used to indicate that the home agent is a static home agent; the mobile node is further configured to save the The IP address of the home agent, that is, the static home agent IP address; the mobile node is further configured to establish a connection with the static home agent according to the saved IP address of the static home agent.

Further, the mobile node is further configured to check whether it has a static home agent saved by itself.

The IP address is used to establish a connection directly with the static home agent that holds the IP address.

The invention provides a method, a system and a mobile node for implementing a static home agent access, and the network device notifies the mobile node of the IP address of the static home agent and the static home agent indication, that is, the IP address of the static home agent is saved in the mobile node, and the mobile node When reconnecting, the mobile node can directly establish a security association and binding relationship with the static home agent according to the saved IP address of the static home agent, so as to prevent the mobile node from performing HA conversion or querying the HA IP again when the mobile node is connected to the network again. The process of the address effectively reduces the load of the network and the UE, and speeds up the access of the UE to the service.

BRIEF abstract

1 is a schematic diagram of an MIPv6 application according to the prior art.

2 is an architectural diagram of an EPS system according to the prior art.

3 is a flow chart of a method for implementing static home agent access in accordance with the present invention.

4 is a flow chart showing an example 1 and 3 of an implementation method of a static home agent access according to the present invention. FIG. 5 is a flow chart showing an example 2 and 4 of a method for implementing static home agent access according to the present invention.

Preferred embodiment of the invention

The core idea of the present invention is that the network notifies the mobile node of the indication that the home agent is a static home agent when notifying the mobile node of its home agent information. The mobile node saves the IP address of the static home agent, and establishes a security alliance with the static home agent directly according to the saved IP address of the static home agent when reconnecting, thereby solving the complexity of the user access service. The problem of a large delay is to speed up the access of the UE to the service.

As shown in FIG. 3, the method for implementing the static home agent access of the present invention includes the following steps: Step 301: The mobile node connects to the access network, and the mobile node queries whether to save the IP address of the static HA. If yes, go to step 304; If not, proceed to step 302; Step 302: The network device (which may be one of GGSN, ePDG, DHCP Server, DNS Server, and P-GW) sends the IP address of the initial home agent to the mobile node. After the mobile node obtains the care-of address, the DSMIPv6 protocol stack is started, and the establishment is initiated. a security alliance with the initial home agent; when the initial home agent knows the IP address of the target home agent and the home agent is a static home agent, the initial home agent sends the IP address of the target home agent and the static home agent indication to the mobile node;

Or the network device sends the IP address of the home agent and the static home agent indication to the mobile node, where the static home agent indication is used to indicate that the target home agent is a static home agent;

Step 303: The mobile node saves the IP address of the static home agent according to the static home agent indication;

Step 304: The mobile node establishes a security association and a binding relationship with the static home agent.

In the method of the present invention, once the mobile node saves the address of the static home agent corresponding to the service (APN), when the mobile node needs to connect to the service, the mobile node corresponds to the service (APN) saved by itself. The IP address of the static home agent directly establishes a security alliance with the static home agent.

The preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention.

The embodiments of the present invention are respectively described below according to different connection request modes.

Example one

4 is a flow chart of an example 1 of a method in accordance with the present invention.

When the user accesses the initial P-GW, the HSS/AAA specifies that the user switches to the target P-GW, and the target P-GW is a static P-GW, the static P-GW access method of the embodiment of the present invention includes the following steps:

5401. The UE authenticates or establishes a secure tunnel with the ePDG through the trusted non-3GPP access network, and obtains a local IP address, which is used as the handover address of the DSMIPv6;

5402. The UE queries whether the IP address of the corresponding static P-GW has been saved according to the current service (APN). If the UE saves, go to step 406. Otherwise, pass an authentication, authorization, and accounting with the HSS/AAA. In the interaction process, the UE establishes a DSMIPv6 security association to the initial P-GW, Sending the service identifier (APN) of the current service to the initial P-GW, and the HSS/AAA sends the saved target IP address, the IP address of the target P-GW, and the reallocation indication to the initial P-GW; The target P-GW of the home agent conversion is a static P-GW, and the HSS/AAA also indicates that the P-GW is a static P-GW;

When the UE disconnects the current connection and needs to connect to the service again, the SA is directly established with the static P-GW according to the IP address of the static P-GW corresponding to the service (APN).

S403: The UE sends a binding update to the initial P-GW.

S404, the initial P-GW sends a home switch message (HA Switch message) to the UE, where the IP address of the target P-GW received in S402 and the static home agent indication are carried, indicating that the P-GW is a static P-GW. The UE saves the IP address of the target P-GW and the service identifier (APN) of the current service;

S405: The UE sends a registration binding update message to the initial P-GW, where the lifetime is set to zero, and the de-registration process in the initial P-GW is completed.

S406. The UE initiates establishing a DSMIPv6 security association to the static P-GW, where the static

The IP address of the P-GW is obtained in S404, and the target P-GW allocates the static IP address of the UE sent by the HSS to the UE as the home address of the UE;

S407. The UE initiates a binding update message to the static P-GW, and the static P-GW replies to the UE binding acknowledgement message to complete the binding process.

Example two

Figure 5 is a flow diagram of an example 2 of a method in accordance with the present invention.

The MN establishes a connection to the initial HA. The initial HA finds that it is not the static HA of the MN, and obtains the static HA of the MN that is internally saved or obtained from the outside, and notifies the static HA.

As shown in FIG. 5, a static HA access method according to an embodiment of the present invention includes the following steps:

5501, the MN accesses the access network, and obtains a care-of address (CoA) from the access network or the access router;

5502, the MN queries whether the IP address of the static HA is saved, and if it is saved, the step is executed. Step 506, otherwise, the MN establishes a security association with the initial HA, and the initial HA allocates a home address to the MN, and sends the home address to the MN;

When the MN disconnects the current connection, the MN needs to establish a security association with the static HA based on the address of the static HA saved by the MN.

S503, the MN initiates a binding update to the initial HA, and the initial HA reply binding is confirmed to the MN;

5504. The initial HA discovery is not the home agent of the MN, and finds the home agent information of the MN in the information saved by itself or obtains the home agent information of the MN from an external (such as an HSS), and sends a home agent conversion indication to the MN, where The IP address containing the target HA, and the static home agent indication, wherein the static home agent indication is used to indicate that the target home agent is a static home agent; the MN saves the IP address of the static HA.

5505, the MN initiates a de-registration binding update to the initial HA, and the initial HA reply to register the binding confirmation message to the MN;

5506, the MN establishes a security association with the static HA obtained in the S504, and the static HA allocates a static IP address to the MN to use;

The static IP address can be saved in static HA or static HA from outside (such as

HSS); and

5507, the MN sends a binding update to the static HA, and establishes a binding between the MN's care-of address and the home address in the static HA; the static HA reply binding is confirmed to the MN.

In summary, because the above embodiment of the present invention is used, the user equipment can directly access the static P-GW/HA without having to go through the home agent conversion process again.

Example three

4 is a flow chart of Example 3 of the method in accordance with the present invention.

In the 3GPP network, the P-GW has the function of the home agent HA. As shown in FIG. 4, when the user accesses the initial P-GW, the HSS/AAA specifies that the user switches to the target P-GW, and the target P-GW is a static P-GW, the static P-GW access method of the embodiment of the present invention Includes the following steps:

S401', the UE performs authentication through the trusted non-3GPP access network, or establishes a secure tunnel with the ePDG, or accesses the 3GPP network, and obtains a local IP address, which is used as the care-of address of the DSMIPv6; Obtain the IP address of the initial P-GW, and obtain the method It can be a DNS query, or a message through a tunnel establishment process with the ePDG, or a DHCP message, or a PCO sent through the GGSN or P-GW;

When the network device (which may be any one of a DNS server, an ePDG, a DHCP server, a GGSN, or a P-GW) knows that the P-GW is a static home agent, the UE may also obtain a static home agent indication sent by the network device, where The UE saves the address of the home agent and marks the home agent as a static home agent; the UE also saves the correspondence between the IP address of the static home agent and the service identifier of the current service; the UE according to the current service (APN) service The identifier is used to check whether the IP address of the P-GW that has been saved is a static IP address. If the IP address of the static P-GW is saved, go to step S406'; if the IP address of the non-static P-GW is saved, , proceeding to step S402';

S402', the UE establishes a DSMIPv6 security association to the initial P-GW by using an authentication, authorization, and charging interaction process with the HSS/AAA, and sends the service identifier (APN) of the current service to the initial P-GW, HSS. /AAA sends the saved IP address of the target P-GW and the reallocation indication to the initial P-GW; the HSS/AAA also indicates that the P-GW is a static P-GW;

Optionally, in the process of authentication, authorization, and charging interaction between the UE and the P-GW and the HSS/AAA, the initial P-GW may indicate that the UE needs the home agent redistribution, and also the IP address of the target P-GW and The static home agent indication is sent to the UE, indicating that the target P-GW is a static P-GW, and the UE jumps to step 406'.

S403', the UE sends a binding update to the initial P-GW;

Optionally, after the initial P-GW receives the binding update sent by the UE, the initial P-GW may send the IP address of the target P-GW and the static home agent indication to the UE in the binding acknowledgement message sent to the UE. Indicates that the target P-GW is a static P-GW, and the UE jumps to step 406'.

S404', the initial P-GW sends a home switch message (HA Switch message) to the UE, where the IP address of the target P-GW received in S402 and the static home agent indication are carried, indicating that the P-GW is a static P- GW; the UE saves the IP address of the P-GW and the service identifier (APN) of the current service;

S405', the UE sends a registration update update message to the initial P-GW, where the lifetime is set to zero, and the de-registration process in the initial P-GW is completed; S406', the UE initiates establishment of a DSMIPv6 security association to the static P-GW (ie, the target P-GW), and the static P-GW (ie, the target P-GW) allocates the static IP address of the UE sent by the HSS to the UE as the UE. Home address; and

S40V, the UE initiates a binding update message to the static P-GW, and the static P-GW replies to the UE binding confirmation message to complete the binding process.

In this embodiment, once the UE saves the address of the static home agent corresponding to the service (APN), when the UE needs to connect to the service, the UE according to the static P-GW corresponding to the service (APN) saved by the UE IP address, directly establishes a security association with the static P-GW.

In order to implement the above method, the present invention also provides an implementation system for a static home agent access, where the system includes a network device and a mobile node, where

The network device is configured to notify the mobile node of the home agent's IP address and the static home agent indication, the static home agent indication is used to indicate that the home agent is a static home agent; the network device may be any of the following: Data network gateway P-GW, GPRS gateway service node GGSN, evolved packet data gateway ePDG, dynamic host configuration protocol server DHCP server, domain name system server DNS Server. Among them, the P-GW has the function of the home agent HA in the 3GPP network.

The mobile node, specifically the user terminal UE, is configured to receive an IP address of a home agent notified by the network device and a static home agent indication, and save an IP address of the home agent, that is, an IP address of a static home agent; The mobile node is further configured to establish a connection with the static home agent according to the saved IP address of the static home agent.

The network device is further configured to query the information saved by itself, or obtain it from the outside, and obtain the IP address of the home agent and whether the home agent is a static home agent.

The function of the home agent in the embodiment of the system is implemented on the P-GW, and the mobile node saves the IP address of the static home agent and the correspondence between the IP address of the static P-GW and the service identifier of the current service. The mobile node is further configured to check whether the IP address of the corresponding static P-GW is saved according to the service identifier of the current service.

Of course, the P-GW is also used to establish a security association with the mobile node, and allocate an IP address to the UE to establish a binding relationship with the UE. The P-GW is also used to obtain the IP address of the target P-GW from the outside, and the target P-GW. Whether it is static P-GW information.

In addition to the P-GW and the UE, the system of the present invention further includes:

a GPRS gateway support node (GGSN), configured to send a PCO to the UE (ie, the mobile node), where the IP address of the home agent and the static home agent indication are carried, where the static home agent indication is used to indicate that the home agent is static Home agent

a trusted non-3GPP access network or an evolved packet data gateway (ePDG) for assigning a care-of address (CoA) to the UE, providing home agent information (such as an IP address and a static home agent indication); also for the UE Sending an IKEv2 message, where the IP address of the home agent and the static home agent indication are carried, the static home agent indication is used to indicate that the home agent is a static home agent; and the DHCP server is configured to send a DHCP message to the UE, where The IP address of the home agent and the static home agent indication, the static home agent indication is used to indicate that the home agent is a static home agent;

The DNS server is configured to send a DNS query result to the UE, where the IP address of the home agent and the static home agent indication are carried, and the static home agent indication is used to indicate that the home agent is a static home agent.

It should be noted that, among the network devices (including P-GW, GGSN, ePDG, DHCP Server, DNS Server) that have the IP address of the home agent of the UE and the static home agent indication function, if any network device has been executed, After notifying the IP address of the UE home agent and the function indicated by the static home agent, the other network devices no longer perform the function.

In addition, the user equipment (UE) is further configured to establish a security association and a binding relationship with the P-GW, and obtain a care-of address;

The home subscriber server HSS, configured to store information of the P-GW, including the IP address of the P-GW and whether the P-GW is a static P-GW and a corresponding service identifier (APN);

The authentication and authorization accounting server is used for authentication, authorization, and accounting operations.

Example four

Figure 5 is a flow diagram of an example four of a method in accordance with the present invention.

The MN establishes a connection to the initial HA, and the initial HA finds that it is not the static HA of the MN, and obtains the static HA of the MN that is internally saved or obtained from the outside, and notifies the static HA of the MN. bandit.

S501', the MN accesses the access network, and obtains a handover address (CoA) from the access network or the access router;

S502', the MN queries the saved IP address of the HA. If the IP address of the static HA is saved, then step 506' is performed. If the IP address of the non-static HA is saved, the MN establishes an initial HA (ie, non-static HA). Security alliance

Optionally, the initial HA may indicate that the MN needs to re-allocate the home agent in the process of establishing the security association, and sends the IP address of the target HA and the static home agent indication to the MN, indicating that the target HA is a static HA, and the MN is hopping. Go to step 506'.

S503', the MN initiates a binding update to the initial HA, and the initial HA reply binding acknowledgement to the MN; optionally, the initial HA may indicate in the binding acknowledgement message sent to the MN that the MN needs the home agent to redistribute and simultaneously target The IP address of the HA and the static home agent indication are sent to the MN, indicating that the target HA is a static HA, and the MN jumps to step 506';

S504', the initial HA discovery is not the home agent of the MN, finds the home agent information of the MN in the information saved by itself or obtains the home agent information of the MN from the outside (such as HSS), and sends a home agent conversion indication to the MN. The IP address of the target HA is included, and the static home agent indication is used to indicate that the target home agent is a static home agent; the MN saves the IP address of the static HA.

S505', the MN initiates a de-registration binding update to the initial HA, and the initial HA reply to register the binding confirmation message to the MN;

S506', the MN establishes a security association with the static HA, and the static HA allocates a static IP address to the MN;

The static IP address can be stored in static HA or static HA obtained from outside (such as HSS).

S50V, the MN sends a binding update to the static HA, and establishes the binding of the MN's care-of address with the home address in the static HA; the static HA reply binding is confirmed to the MN.

In this embodiment, once the MN saves the IP address of the static home agent HA, the subsequent MN When the current connection is disconnected, the MN establishes a security association with the static HA directly based on the IP address of the static HA.

In order to implement the above method, the present invention also provides an implementation system for static home agent access, and the implementation system includes a network device and a mobile node.

The network device is configured to notify an IP address of a home agent of the mobile node and a static home agent indication, where the static home agent indication is used to indicate that the home agent is a static home agent;

The mobile node is configured to receive and save an IP address of the home agent and a static home agent indication, that is, save an IP address of the static home agent; the mobile node is further configured to use the IP address of the saved static home agent, Establish a connection with the static home agent.

Of course, the home agent is also used to establish a security alliance with the mobile node, and assign an IP address to the mobile node and establish a binding relationship, and is also used to query the information saved by itself, or obtain it from the outside, and obtain the IP address of the home agent. And whether the agent in the hometown is a proxy for a static home agent.

In addition to the home agent and the mobile node, the system of the present invention further includes:

An access network or an access router, configured to allocate a care-of address (CoA) to the UE;

The mobile node is further configured to establish a security association and a binding relationship with the home agent, and obtain a care-of address.

In the present invention, the "initial home agent" and the "target home agent" are concepts defined to describe the switching process. The initial home agent refers to the home agent before the conversion, and the target home agent refers to the converted home agent, the target hometown. The agent may be a static home agent or not. When the initial home agent judges that the target home agent is a static home agent, the sending target home agent is an instruction of the static home agent, so that the mobile node recognizes and saves.

The present invention further provides a mobile node, where the mobile node is configured to receive an IP address of a home agent and a static home agent indication sent by the network device, where the static home agent indication is used to indicate that the target home agent is a static home agent;

The mobile node is further configured to save an IP address of the home agent, that is, an IP address of a static home agent; the mobile node is further configured to directly and according to the saved IP address of the static home agent. The static home agent establishes a connection.

The mobile node is further configured to check whether it has an IP address of a static home agent stored in itself to directly establish a security association with a static home agent that holds the IP address.

When the function of the home agent is implemented by the packet data network gateway P-GW, the IP address of the static home agent refers to the IP address of the static P-GW; when the mobile node saves the IP address of the static P-GW And storing the correspondence between the IP address of the static P-GW and the service identifier of the current service. When the mobile node checks, it checks whether the corresponding static P-GW is saved according to the service identifier of the current service. IP address.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

INDUSTRIAL APPLICABILITY The method, system and mobile node for implementing the static home agent access of the present invention, when switching to the static home agent, the IP address of the static home agent is saved in the mobile node, and when the mobile node is connected again, the mobile node can save according to the The IP address of the static home agent directly establishes a connection with the static home agent, avoiding the process of performing HA conversion or HA query again when the mobile node connects to the network again, effectively reducing the load of the network and the UE, and speeding up the UE access service. speed.

Claims

Claim

1. A method for implementing static home agent access, comprising:

(a) the network device sends the IP address of the home agent and the static home agent indication to the mobile node, where the static home agent indication is used to indicate that the home agent is a static home agent;

(b) the mobile node saves the IP address of the home agent, that is, the static home agent

IP address; and,

2. The method according to claim 1, wherein the network device is one of: a packet data network gateway P-GW, a GPRS gateway service node GGSN, an evolved packet data gateway ePDG, a dynamic host configuration protocol server DHCP server, and Domain Name System Server DNS Server.

3. The method according to claim 1 or 2, wherein

When the function of the home agent is implemented by the packet data network gateway P-GW,

The IP address of the static home agent refers to the IP address of the static P-GW.

The mobile node in the step (b) also saves the correspondence between the IP address of the static P-GW and the service identifier of the current service, so that the mobile node obtains the corresponding static according to the service identifier. The IP address of the P-GW, which in turn establishes a connection with the corresponding static home agent.

4. The method of claim 3, wherein

The mobile node further checks whether the IP address of the corresponding static P-GW is saved according to the service identifier of the current service, and establishes with the corresponding static home agent according to the saved IP address of the static P-GW. connection.

5. An implementation system for static home agent access, the implementation system comprising a network device and a mobile node, wherein:

The network device is configured to notify an IP address of the mobile node home agent and a static home agent indication, wherein the static home agent indication is used to indicate that the home agent is a static home agent; the mobile node is configured to receive the The IP address of the home agent notified by the network device and the static home agent indication, and the IP address of the home agent, that is, the IP address of the static home agent is saved; the mobile node is further set according to the saved static hometown The IP address of the proxy, with The static home agent establishes a connection.

6. The system according to claim 5, wherein the mobile node is further configured to check whether the IP address of the static home agent is saved by itself, and is directly established with the static home agent that holds the home IP address. connection.

7. The system according to claim 5, wherein the network device is one of: a packet data network gateway P-GW, a GPRS gateway service node GGSN, an evolved packet data gateway ePDG, a dynamic host configuration protocol server DHCP Server And the Domain Name System Server DNS Server.

8. The system according to any one of claims 5-7, wherein, when the function of the home agent is implemented by the packet data network gateway P-GW,

The IP address of the static home agent refers to the IP address of the static P-GW;

When the mobile node saves the IP address of the static P-GW, the mobile node is further configured to save the correspondence between the IP address of the static P-GW and the service identifier of the current service;

The mobile node is further configured to check whether the IP address of the corresponding static P-GW is saved according to the service identifier of the current service.

9. The system according to claim 5, wherein the network device is further configured to query information saved by itself, or obtain from external, obtain an IP address of the home agent, and whether the home agent is a static home agent. information.

10. A mobile node for accessing a static home agent,

The mobile node is configured to receive an IP address of a home agent notified by the network device and a static home agent indication, where the static home agent indication is used to indicate that the home agent is a static home agent;

The mobile node is further configured to save an IP address of the home agent, that is, an IP address of a static home agent; the mobile node is further configured to establish a connection with the static home agent according to the saved IP address of the static home agent. .

11. The mobile node according to claim 10, wherein the mobile node is further configured to check whether the IP address of the static home agent is saved by itself, directly with the static home agent that holds the home IP address. establish connection.