CN101064648A

CN101064648A - System for realizing mobile IPv6 and its method for establishing user connection

Info

Publication number: CN101064648A
Application number: CNA2006100796454A
Authority: CN
Inventors: 郑若滨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-04-30
Filing date: 2006-04-30
Publication date: 2007-10-31
Also published as: WO2007128239A1

Abstract

The present invention provides a system for realizing mobile IPv6 and a method for establishing user connection thereof. The system mainly includes: PMIPv6 Client (IP proxy mobile IP version 6 client): set in ASN (access service network) or mobile gateway or mobile network The bridge acts as a proxy for the MN (Mobile Node) to perform mobile IPv6 functions by exchanging information with the home agent. Utilizing the present invention, it can be realized that MS only supports SimpleIPv6 without implementing Mobile IPv6, so that the functions of MS are simple.

Description

System for realizing mobile IPv6 and user connection establishing method thereof

Technical Field

The invention relates to the field of communication, in particular to a system for realizing mobile IPv6 and a user connection establishing method thereof.

Background

A BWA (Broadband wireless access) device may provide a convenient Broadband access manner for a user. At present, broadband wireless access equipment based on a private protocol exists, and broadband wireless access equipment based on a standard protocol also exists. Broadband wireless access devices defined by the IEEE (institute of electrical and electronics engineers) 802.16 standard are a subset of a family of standards for broadband wireless access technologies. The BWA device includes a WIMAX (worldwide interoperability for microwave access) device.

The WiMAX forum defines a Multiple Hosts architecture based on G-RS (gateway relay station)/G-MS (gateway mobile station) as shown in fig. 1. The G-RS/G-MS is connected to a plurality of G-hosts through a first interface and connected to an ASN (access service network) through a second interface. Wherein, the first interface is a G-interface which adopts 802.3 or 802.11 two-layer transmission technology; the second interface is the R1 interface, and R1 employs 802.16e wireless two-layer transport technology. The ASN and the CSN (connection service network) are connected through an R3 reference point, and the CSN of NAP + V-NSP (network access provider and visited network service provider) and the CSN of H-NSP (home network service provider) are connected through an R5 reference point.

In WIMAX IPv6 networks, the MIPv6(IP client mobile IPv6) of the CMIPv6(IP client mobile IPv6) standard is currently adopted, see RFC 3775. MIPv6 relates to three functional entities HA (home agent), MN (mobile node) and CN (peer communication node). The client of CMIPv6 is located at the MS/G-Host. During the movement of R3, the MS/G-Host performs (full state or stateless) address autoconfiguration and takes this newly formed address as its CoA (care-of address).

The MS/G-Host registers HoA and registers CoA with HA on its home link, and sends data packet containing destination option of 'binding update' to HA, which registers the binding and returns a data packet containing destination option of 'binding acknowledgement' to MS/G-Host. The HA intercepts all data packets with the home address of the MS/G-Host, and each intercepted data packet is encapsulated by IPv6 and sent to the care-of address registered by the mobile node by adopting a tunneling technology.

In the prior art, a method for communication between communication nodes in the WIMAX IPv6 network includes: if a communication node wants to communicate with another MS/G-Host away from the home network, the routing process of the data packet is: from the correspondent node to the HA, from the HA to the MS/G-Host, and from the MS/G-Host to another correspondent node away from the home network. This type of routing is commonly referred to as triangular routing. In order to avoid the triangular routing problem, the MS/G-Host may send a binding update carrying the current CoA to any one of the correspondent nodes, which caches the current CoA carried in the binding update and directly sends a packet to the MS/G-Host.

The disadvantages of the above method are:

1. the method requires that the MS must realize Mobile IPv6, and cannot adopt the MS only supporting Simple IPv6 (Simple IPv6), so that the function of the MS is complex;

2. the method needs to waste air interface resources for CoA registration;

3. since the 3G network (e.g., WCDMA) does not support CMIPv6, communicating according to this method makes the interconnection of WiMAX and the 3G network (e.g., WCDMA) problematic;

4. since the G-Host and the G-MS/G-RS are usually Mobile networks installed on trains, automobiles or ships, the G-Host is often a terminal used by passengers fixed relative to the G-MS/G-RS, and the Mobile IPv6 function cannot be realized, so that the method cannot be used in the existing WiMAX Mobile multi-Host network.

Disclosure of Invention

In view of the problems existing in the prior art, the present invention aims to provide a system for implementing Mobile IPv6 and a user connection establishment method thereof, so that an MS that only supports Simple IPv6 can be implemented without implementing Mobile IPv 6.

The purpose of the invention is realized by the following technical scheme:

a system for implementing mobile IPv6, including a home agent, further comprising:

IP proxy mobile IP version 6Client PMIPv6 Client: and the mobile node MN is arranged in an access service network ASN or a mobile gateway or a mobile bridge and performs the function of mobile IPv6 by acting on the information interaction agent MN with the home agent.

The PMIPv6Client comprises:

PMIPv6Client control plane PMIPv6Client CP: the proxy MN performs the control plane functions of the mobile IPv 6;

PMIPv6Client data plane PMIPv6Client DP: and the proxy MN executes the data plane function of mobile IPv6 on a data path between the MN and the home agent HA.

The PMIPv6Client CP agent MN executes mobile detection, care-of address CoA generation and returns to the home location;

the PMIPv6Client CP agent MN executes the processing of mobile head Mobility heads;

the PMIPv6Client CP agent MN sends the Binding update Updates message;

the PMIPv6Client CP agent MN executes the receiving and processing of the binding acknowledgement messages;

the PMIPv6Client CP agent MN receives the Binding refreshing request message and sends a Binding updating Update message as a response;

the PMIPv6Client CP agent MN receives the Mobile prefix advertisement messages and the routing advertisement messages sent to the MN contain the prefix information in the Mobile prefix advertisement messages;

the PMIPv6Client CP agent MN receives the binding error message;

and/or the presence of a gas in the gas,

the PMIPv6Client CP agent MN receives the ICMP error message of the Internet control message protocol;

and/or the presence of a gas in the gas,

the PMIPv6Client CP agent MN executes a return routability procedure;

and/or

The PMIPv6Client CP acts on MN to discover the dynamic home address HA address.

The PMIPv6Client CP acting on MN to perform mobility detection specifically includes:

for worldwide interoperability for microwave access WiMAX networks, the mobility detection may be supported with the assistance of a radio resource management module or a handover control module.

The PMIPv6Client CP and the authenticator are placed together, and the PMIPv6Client CP and the HA obtain a key required by the PMIPv6 through the authenticator and the AAA server.

The PMIPv6Client DP agent MN executes IPv6 tunnel encapsulation and decapsulation;

the PMIPv6Client DP agent MN executes the starting and the closing of the route optimization;

the PMIPv6Client DP agent MN executes packet sending containing home address HoA options and interaction of IP security protocol IPsec;

and/or the presence of a gas in the gas,

the PMIPv6Client DP agent MN executes multicast address audience of multicast group member protocol, and receives a tunnel multicast packet from HA;

and/or the presence of a gas in the gas,

the PMIPv6Client DP agent MN executes the routing header processing of the 2-type routing header;

and/or the presence of a gas in the gas,

the PMIPv6Client DP establishes and maintains an address pool of the proxied MN;

and/or the presence of a gas in the gas,

for a wireless network, the PMIPv6Client DP supports Proxy DAD, and replaces MN to execute DAD function.

The PMIPv6Client CP and the PMIPv6Client DP are arranged in the same AR or are respectively arranged in different ARs.

The MN includes a mobile station and a host device.

The system of the mobile IPv6 is applicable to a multi-host Multiple Hosts architecture of a WIMAX system, and the WIMAX system comprises: the mobile gateway or the mobile bridge is connected with each host device through a first interface and connected with the ASN through a second interface.

The mobile gateway comprises: a gateway mobile station G-MS or a gateway relay station G-RS, said mobile bridge comprising: a bridge mobile station or a bridge transit station.

A PMIPv6 user connection establishment method comprises the following steps:

A. performing access authentication on MN;

B. MN automatically configures link-local address LLA, and DAD is carried out on LLA;

C. PMIPv6Client generates CoA of MN, completes MIPv6 registration.

The step A specifically comprises the following steps:

PMIPv6Client obtains AAA key, HA address and HoA or DHCP server address by performing AAA access authentication message interaction with the home H-AAA server of MN.

The step B specifically comprises the following steps:

once a data path between the MN and the PMIPv6Client is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains experimental tentativeLLA;

PMIPv6Client establishes and maintains the proxied MN IP Address Cache; comparing the addresses in the LLA and the Address Cache, and if the addresses are matched, replacing a matched Address owner to send Proxy Neighbor Advertisements; otherwise, add the LLA to the Address cache.

The step C specifically comprises the following steps:

c1, when the authenticator gets DHCP server address in the access process, the DHCPproxy/Relay downloads DHCP server address and MN identification from the authenticator; or, the DHCP server address is statically configured;

c2, MN uses DHCPv6 to carry out MN HoA distribution and IP host configuration;

c3, PMIPv6Client obtains HoA of MN from DHCP Proxy/Relay;

c4 and PMIPv6Client acquire the interface identifier from the LLA, and attach the interface identifier to the prefix broadcasted by the AR to the CMIPv6 node to generate the CoA of the MN; or, the PMIPv6Client takes the IP address of the AR as the CoA of the MN;

c5, PMIPv6Client sends MIPv6 registration message containing HoA, CoA and security data of MN, HA responds binding confirmation message to PMIPv6 Client.

The step C2 specifically includes:

the MN sends a DHCPv6Solicit message; the DHCP Proxy/Relay transfers the received DHCPv6Solicit message to the DHCP server, and transfers the DHCPv6 advertisement message responded by the DHCP server to the MN; MN selects the needed DHCP Server, responds DHCPv6Request message to the selected DHCP Server through DHCP Proxy/Relay, the DHCP Server sends DHCPv6 Reply message containing HoA and IP host configuration options to DHCP Proxy/Relay;

or,

the MN sends a DHCPv6Solicit message; DHCP Proxy/Relay responds DHCPv6 advertisement message to MN; the MN responds to the DHCPv6Request message to the DHCP Proxy/Relay.

The step C3 specifically includes:

after the DHCP Proxy/Relay obtains the HoA of the MN by a DHCPv6 method, the HoA is sent to the PMIPv6Client through the HoA Address source language, and the HoA Address source language comprises the MN identification.

The step C specifically comprises the following steps:

c7, when in the access process, after the PMIPv6Client obtains the HoA of the MN, the PMIPv6Client obtains the interface identifier from the LLA, and attaches the interface identifier to the prefix of the AR where the interface identifier is located and broadcasts the prefix to the CMIPv6 node to generate the CoA of the MN; or, the PMIPv6Client takes the IP address of the AR as the CoA of the MN;

c8, PMIPv6Client sends MIPv6 registration message containing HoA, CoA and security data of MN to HA, HA responds binding confirmation message to PMIPv6 Client.

The step C5 and the step C8 further comprise:

after finishing MIPv6 registration, sending a DHCP _ gating.Release message for releasing a DHCP gating function, wherein the DHCP gating function is used for avoiding that the MN initiates IP communication before an end-to-end data path is established; after the R3 session is established, the DHCP Proxy/Relay sends a DHCPv6 Reply message to the MN.

The step C further comprises the following steps:

when the ASN/G-MS/G-RS supports the PMIPv6 and CMIPv6 dual modes, the DHCP Proxy/Relay informs the MIP mode adopted by the ASN Fn through an R3_ Mobility _ Context message.

The step C further comprises the following steps:

when the initial connection is established, after the PMIPv6Client sends a MIPv6 registration message to the HA, before the HA responds to a binding confirmation message to the PMIPv6Client, the HA interacts with the H-AAA to acquire an MN-HA key and a PMIPv6 Client-HA key.

The method is suitable for a V-NSP scene of the HA network service provider at the visit place or an H-NSP scene of the home location network service provider.

A PMIPv6 user connection establishment method comprises the following steps:

D. performing access authentication on MN;

E. MN automatically configures link-local address LLA, and DAD is carried out on LLA;

F. PMIPv6Client generates CoA of MN, completes MIPv6 registration and acts as DAD;

G. the MN automatically configures the HoA through router discovery.

The step D specifically comprises the following steps:

PMIPv6Client obtains AAA key, HA address and HL prefix by performing AAA access authentication message interaction with the H-AAA server of MN.

The step D also comprises the following steps:

PMIPv6Client obtains the HoA of the MN by performing AAA access authentication message interaction with the H-AAA server of the MN.

The step E specifically comprises the following steps:

once a data path between the MN and the PMIPv6Client is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains a tentative LLA;

The step F specifically comprises the following steps:

f1, when the authenticator obtains the HoA of the MN in the access process, the PMIPv6Client directly obtains the HoA from the authenticator; otherwise, the PMIPv6Client extracts the interface identifier from the LLA, attaches the interface identifier to the HL prefix and then generates the HoA of the MN; the PMIPv6Client attaches the interface identifier to a prefix broadcasted to the CMI Pv6 node by the AR where the interface identifier is located to generate the CoA of the MN, or the IP address of the AR where the interface identifier is located is used as the CoA of the MN;

f2, PMIPv6Client sends MIPv6 registration message containing HoA, CoA and security data of MN; after the HA replaces the MN to complete the DAD, a binding confirmation message is responded to the PMIPv6 Client.

The step F further comprises the following steps:

The step G specifically comprises the following steps:

the MN sends a router request message, after the AR where the PMIPv6Client is located successfully registers in the MIPv6, the AR responds to the MN with a router advertisement message carrying an HL prefix, the MN learns the HL prefix according to the router advertisement message, automatically configures HoA according to the HL prefix,

or,

after the AR where the PMIPv6Client is located finishes MIPv6 registration, a router advertisement message carrying an HL prefix is actively sent to the MN, the MN learns the HL prefix according to the router advertisement message, and the HoA is automatically configured according to the HL prefix.

The step G further comprises:

the MN initiates a stateless DHCPv6 to obtain IP host configuration information.

Further comprising:

the method is suitable for Multiple Hosts architecture of WIMAX system, and the WIMAX system comprises the following steps: the system comprises host equipment, a mobile gateway or a mobile bridge, and ASN and CSN which are connected with each other, wherein the mobile gateway or the mobile bridge is connected with each host equipment through a first interface and is connected with the ASN through a second interface, and the mobile gateway or the mobile bridge transfers information between the host equipment and the ASN.

The message between the host device and the ASN comprises: neighbor request message IPv6Neighbor Solicitation, Neighbor broadcast message Neighbor Advertisement, Router request message Router Solicitation, or Router broadcast message Router Advertisement.

The step E specifically comprises the following steps:

once a data path between the MN and the PMIPv6Client DP is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains a tentative LLA;

PMIPv6Client DP supports LLA agent DAD, establishes and maintains the agent MN IPAddress Cache, PMIPv6Client DP learns MN LLA from MN Neighbor Solicitation message; PMIPv6Client DP compares the addresses in the latent LLA and the Address Cache; if the matching exists, the Proxy neighbor address notification message is sent instead of the matching address owner; if there is no match, then only the tentative LLA is added to the Address cache.

The step F specifically comprises the following steps:

f3, PMIPv6Client DP obtains the interface identifier from the LLA, attaches the interface identifier to the prefix broadcasted by the AR to the CMIPv6 node to generate the CoA of the MN, or takes the IP address of the AR as the CoA of the MN;

f4, PMIPv6Client DP sends registration start message containing CoA or LLA of MN to PMIPv6Client CP, starts MIPv6 registration process;

f5, if PMIPv6Client DP obtains the HoA of MN, PMIPv6Client DP directly uses the HoA; otherwise, PMIPv6Client DP obtains the interface identifier from the LLA or CoA, attaches the interface identifier to HL prefix and then generates the HoA of MN;

f6, PMIPv6Client CP sends MIPv6 registration message containing HoA, CoA and security data of MN, HA replaces MN to finish DAD, responds to binding confirmation message to PMIPv6Client CP; the PMIPv6Client CP sends a registration success message to the PMIPv6Client DP.

The step G specifically comprises the following steps:

the MN sends a router request message, after the AR where the PMIPv6Client DP is located successfully registers in the MIPv6, the AR responds to the MN with a router advertisement message carrying an HL prefix, the MN learns the HL prefix according to the router advertisement message, automatically configures HoA according to the HL prefix,

or,

after the PMIPv6 AR where the Client DP is located finishes MIPv6 registration, actively sending a router advertisement message carrying an HL prefix to the MN, the MN learns the HL prefix according to the router advertisement message, automatically configuring an HoA according to the HL prefix,

Further comprising:

The message between the host device and the ASN comprises: IPv6Neighbor Solicitation, Neighbor Advertisement, Router Solicitation or Router Advertisement.

It can be seen from the above technical solutions that, by providing a mechanism of Proxy MIPv6, the present invention adds a new functional entity PMIPv6Client (PMIPv6 Client) to an ASN or G-MS/G-RS, which has the following advantages:

1. the MS only supporting Simple IPv6 can be used, and the MS does not need to realize Mobile IPv6, so that the function of the MS is Simple;

2. PMIPv6Client (PMIPv6 Client) can be arranged at the network side, and CoA registration does not need to waste air interface resources;

3. because the MS only supporting Simple IPv6 can be used, the MIP problem when WiMAX and 3G networks (such as WCDMA) are interconnected can be solved;

4. the restriction of WiMAX mobile multi-Host is solved because G-Host supporting only Simple IPv6 can be used.

Drawings

FIG. 1 is a block diagram of a Multiple Hosts architecture based on G-RS/G-MS;

FIG. 2 is a functional block diagram of the PMIPv6Client according to the present invention;

FIG. 3 is a diagram of a protocol stack of the PMIPv6 data plane according to the present invention;

FIG. 4 is a diagram of a data plane protocol stack of a WiMAX network PMIPv 6;

fig. 5 is a schematic diagram of a data plane protocol stack of a multi host network PMIPv6 based on 802.16 relay;

fig. 6 is a schematic diagram of a data plane protocol stack of a multi host network PMIPv 6;

FIG. 7 is a flow chart of a DHCPv 6-based PMIPv6 user connection establishment procedure according to the present invention;

FIG. 8 is a flow chart illustrating a process for establishing a connection for a PMIPv6 user based on automatic configuration according to the present invention;

FIG. 9 is a flowchart of a process for establishing connections for users based on automatically configured PMIPv6 according to the present invention;

fig. 10 is a flowchart of a process of establishing a connection based on an automatically configured PMIPv6 user according to the present invention.

Detailed Description

The invention provides a system for realizing mobile IPv6 and a user connection establishing method thereof, the core of the invention is as follows: a new functional entity PMIPv6Client (PMIPv6 Client) is added in the ASN or the mobile gateway or the mobile bridge, and the mobile IPv6 function is executed by the information interaction agent MN with the authenticator and the home agent.

The system of the present invention is described in detail below, and the system of the present invention is based on MIPv6, and its main inventive point is that a new functional entity PMIPv6Client is added to the ASN or mobile gateway or mobile bridge for acting MN to execute mobile IPv6 function, while MN only needs to support Simple IPv6 function and does not need to support mobile IPv6 function.

The mobile bridge described above comprises: a bridge mobile station or a bridge transit station. In a WiMAX network, the mobile gateway includes: G-MS or G-RS, MN can be MS or G-Host, and the movement brought by CoA update is transparent to MN.

The functional block diagram of adding a new functional entity PMIPv6Client to the ASN or G-MS/G-RS provided by the invention is shown in FIG. 2. The PMIPv6Client comprises two subfunction entities of PMIPv6Client CP and PMIPv6Client DP.

The PMIPv6Client CP performs control plane functions of the mobile IPv6 in proxy for the MN, as supported by registration, and the PMIPv6Client CP is co-located with the Authenticator. PMIPv6 the client CP and HA get the key needed by PMIPv6 through Authenticator and AAA; in the authentication process, the PMIPv6Client CP and the HA search through AAA information interaction to obtain the relevant information required by MIP registration.

The PMIPv6Client CP proxy MN performs the following control plane functions of mobile IPv 6:

1. supporting reception of a Binding Error message;

2. supporting reception of an ICMP error message;

3. support mobile detection, CoA generation and home return;

4. support the processing of Mobility heads;

5. support for return routability procedure;

6. the transmission of Binding Updates messages is supported;

7. supporting the receiving and processing of Binding Acknowledgements (Binding acknowledgement) messages;

8. supporting the receiving of a Binding Refresh Request message and responding with a Binding Update message;

9. the method supports the receiving of Mobile Prefix Advertisements, and Prefix information in the Mobile Prefix Advertisement message is contained in the Router Advertisement message sent to the MN;

10. support a dynamic HA address discovery mechanism;

11. for WiMAX networks, Proxy DAD (Proxy duplicate address detection) is supported.

PMIPv6Client DP proxy MN performs the data plane functions of Mobile IPv6, such as support of tunnel, and PMIPv6Client DP is always placed on the data path between MN and HA.

PMIPv6Client DP should support the following functions:

1. the method supports packet transmission with HoA options and supports Ipsec (IP Security protocol) interaction;

2. supporting IPv6 tunnel encapsulation and decapsulation;

3. supporting 2-type routing header processing;

4. the starting and the closing of route optimization are supported;

5. the multicast address audience which can support the multicast group member protocol should be able to receive the tunnel multicast packet from the HA when supporting the multicast address audience;

6. the method supports the establishment and maintenance of the proxied MN IP Address Cache (Address pool), supports Proxy DAD for the WiMAX network, and replaces the MN to complete the DAD function.

The PMIPv6Client CP and the PMIPv6Client DP can be arranged in the same AR or respectively arranged in different ARs, the different ARs support the functions of searching the IPv6 adjacent node and discovering the router of the MN, and the different ARs and the MN belong to the same Link.

The HA and AAA in fig. 2 are located in the CSN (connection service network), and the functions of the HA and AAA are the same as those of the prior art.

The protocol stack of the data plane of PMIPv6 is shown in fig. 3, and PMIPv6 supports route optimization. The HA and CN MIP data surface processing is the same as the prior art.

In the downlink (CN- > MN) direction, PMIPv6Client DP is used as the end point of MIPv6 tunnel, and when PMIPv6Client DP receives IP packet from HA or CN, the following processes are carried out:

1. checking the IP destination address of the outer layer of the tunnel, judging whether the IP destination address is the CoA of the MN of the proxy of the tunnel, and if so, receiving the IP packet and carrying out subsequent processing; otherwise, the IP packet is discarded.

2. And performing tunnel de-encapsulation processing on the received IP packet.

3. Checking the tunnel inner layer IP destination address of the IPv6 packet subjected to tunnel de-encapsulation, judging whether the address is the HoA (home address) of the MN of the proxy, and if so, sending the IPv6 packet subjected to tunnel de-encapsulation to the MN; otherwise, the IP packet is discarded.

In the uplink (MN- > CN) direction, when the PMIPv6 does not support the reverse tunnel function, for the IPv6 packet sent by all visiting MNs, the PMIPv6Client DP completes the function of the router; when the PMIPv6 supports the reverse tunnel function, the PMIPv6Client DP is used as the starting point of the MIPv6 reverse tunnel, and the IPv6 packets sent by all visiting MNs are processed as follows:

1. checking the IP source address of the IPv6 packet, judging whether the IP source address is the HoA of the MN of the proxy of the IPv6 packet, and if not, directly routing the received IP packet and sending the IP packet; if yes, performing tunnel encapsulation processing on the received IP packet, adding an outer layer IP header with CoA of MN as a source address and IPv6 address of HA or CN as a destination address, and performing subsequent processing;

2. and routing the IP packet subjected to tunnel encapsulation according to the outer IP header, and sending out.

The protocol stack of the PMIPv6 data plane is illustrated in fig. 4-6 for an embodiment of a WiMAX network. Fig. 4 is a schematic diagram of a data plane protocol stack of WiMAX network PMIPv6, fig. 5 is a schematic diagram of a data plane protocol stack of multi-host network PMIPv6 based on 802.16 relay, and fig. 6 is a schematic diagram of a data plane protocol stack of multi-host network PMIPv 6.

In fig. 4, PMIPv6Client DP is located on ASN, MS is connected to PMIPv6Client DP via 802.16R1, and tunnel (DP) between BS and PMIPv6Client DP forms a logical Link of IPv 6.

In fig. 5, PMIPv6Client DP is located on ASN and supports multiple hosts function based on 802.16 relay, and the logical Link of IPv6 is formed by 802.16G-Interface connection between MS and PMIPv6Client DP, R1 connection, and tunnel (DP) between BS and PMIPv6Client DP.

In FIG. 6, PMIPv6Client DP is located at G-MS/G-RS, supporting G-MS/G-RS based Multiple Hosts functionality.

The method of the present invention is described in detail below with reference to the accompanying drawings.

In terms of PMIPv6 signaling plane processing, a flow of PMIPv6 user connection establishment process based on DHCPv6 (dynamic host configuration protocol IPv6) is shown in fig. 7, where the HA is in V-NSP (visited network service provider), and for the HA is in H-NSP (home network service provider), the V-AAA in fig. 7 only needs to be removed.

The PMIPv6 user connection establishment procedure shown in fig. 7 includes the following steps:

and step 71, access authentication.

In the access authentication process, whether the network allocates the HoA to the MN is determined; PMIPv6Client obtains AAA key, HA address, and HoA or DHCP server address by performing AAA access authentication message interaction with H-AAA of MN (including MS or G-Host).

Step 72, automatic configuration LLA (link-local address) and DAD (duplicate address detection).

Once a data path between the MN and the PMIPv6Client is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains tentative LLA.

PMIPv6Client supports Proxy DAD (Proxy DAD) of LLA, establishes and maintains Proxy MN IP Address Cache, PMIPv6Client can learn LLA of MN from Neighbor Solicitation message of MN; PMIPv6Client compares the addresses in the tentative LLA and the Address Cache; if the matching exists, the Proxy neighbor address notification message is sent instead of the matching address owner; if there is no match, then only the tentative LLA is added to the Address cache.

And step 73, configuring the DHCP server.

If the Authenticator obtains the DHCP server address in step 71, the DHCPProxy/Relay may download the DHCP server address and MN identification (MAC address) from the Authenticator; DHCP Proxy/Relay can also statically configure DHCP server address, execute step 74-step 77; otherwise, steps 78-79 are performed. Step 74-step 77, IP address assignment and IP host configuration.

In the PMIPv6 scheme, the MN is transparent to IP movement, and the MN utilizes DHCPv6 to carry out MNHoA allocation and IP host configuration; the MN initiates a DHCPv6Solicit message to discover available DHCPservers; after receiving DHCPv6Solicit message, DHCP Proxy/Relay transfers the message to DHCP server; any DHCP server which can meet the requirements of MN can respond DHCPv6 advertisement message to DHCP Proxy/Relay; the DHCP Proxy/Relay transfers the DHCPv6 advertisement message to the MN; the MN selects a proper DHCP Server, and then sends a DHCPv6Request message to the DHCP Server through a DHCP Proxy/Relay; the DHCP Server generates a DHCPv6 Reply message containing the HoA and IP host configuration options and sends the message to the DHCPproxy/Relay. The steps in the dashed box in fig. 7 are optional steps.

Or,

Steps 78-79 are performed.

Step 78-step 79.

For the case that the ASN/G-MS/G-RS supports PMIPv6 and CMIPv6 dual modes, the DHCPproxy/Relay informs the MIP mode adopted by the ASN Fn through R3_ Mobility _ Context message; if the ASN/G-MS/G-RS supports only PMIPv6, this step can be omitted;

step 710, CoA generation.

PMIPv6Client extracts interface identifier (interface identifier) from LLA, attaches the interface identifier to the prefix broadcasted by the AR to CMIPv6 node, and generates CoA of MN;

the PMIPv6Client may also use the IP address of the AR as the CoA of the MN, i.e. different MNs of the PMIPv6Client proxy will use the same CoA, which may bring additional requirements to the HA, requiring that the HA cannot support CoA uniqueness checking on the MN.

Step 711-step 712.

After the DHCP Proxy/Relay obtains the HoA by the DHCPv6 or AAA method, the HoA is sent to the PMIPv6Client by the HoA Address private (source), and the HoA _ Address source contains the MN identifier (MAC Address).

Step 713-step 716, MIPv6 registration

After CoA generation and HoA acquisition of the MN, the PMIPv6Client can initiate MIPv6BU (registration message), and MIPv6BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. security services, such as MN-AAA authentication mobility options.

The HA responds to a binding confirmation message to the PMIPv6 Client;

wherein, the steps 714 to 715 are optional, and when the initial connection is established, after the PMIPv6Client sends the MIPv6 registration message to the HA, before the HA replies the binding confirmation message to the PMIPv6Client, the HA interacts with the H-AAA to acquire the MN-HA key and the PMIPv6 Client-HA key.

Step 717-step 718, DHCP reply:

after successful MIPv6 registration, PMIPv6Client sends DHCP _ gating.Release message, and then DHCP Proxy/Relay sends DHCPv6 Reply message to MN after R3 session is established; DHCP Gating is used to avoid the MN initiating IP communications before the end-to-end data path is established.

The process of establishing connection for the PMIPv6 user based on automatic configuration provided by the invention is shown in FIG. 8, wherein in a V-NSP scene of the HA, for an H-NSP scene of the HA, only the V-AAA in FIG. 8 needs to be removed.

The PMIPv6 user connection establishment procedure shown in fig. 8 includes the following steps:

and step 81, access authentication.

In the access authentication process, whether the network allocates the HoA to the MN is determined; PMIPv6Client obtains AAA key, HA address, HL prefix and HoA by performing AAA access authentication message interaction with H-AAA of MN (including MS or G-Host). The HoA of the MN is optional.

Step 82, automatically configuring the LLA and DAD.

Once a data path between the MN and the PMIPv6Client is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains the tentative LLA.

Step 83, HoA and CoA generation.

If the authenticator obtained the HoA of the MN in the above step 81, the PMIPv6Client obtains the HoA directly from the authenticator; otherwise, the PMIPv6Client extracts the interface identifier from the LLA, attaches the interface identifier to the HL prefix and generates the HoA of the MN;

PMIPv6Client extracts interface identifier from LLA, attaches the identifier to the prefix broadcasted by AR to CMIPv6 node, and generates CoA of MN;

Step 84-step 88, MIPv6 registration and proxy DAD.

After obtaining CoA and HoA of MN, PMIPv6Client can initiate MIPv6 registration message BU; MIPv6BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. security services, such as MN-AAA authentication mobility options. The HA needs Proxy DAD (Proxy DAD) to support HoA; after the HA replaces the MN to finish DAD, responding a binding confirmation message to the PMIPv6 Client;

and step 85-step 86, which is optional, when the initial connection is established, after the PMIPv6Client sends the MIPv6 registration message to the HA, before the HA responds to the binding confirmation message to the PMIPv6Client, the HA interacts with the H-AAA to acquire the MN-HA key and the PMIPv6 Client-HA key.

Step 89-step 810, router discovery.

The MN initiates an RS (router solicitation) message to request RA (router advertisement) message response of an AR where the PMIPv6Client is located so as to learn the on-link prefix; after the PMIPv6Client is successfully registered in the AR of the MIPv6 (the HoA passes through the Proxy DAD of the HA), an RA message carrying the HL prefix is sent to the MN, and the MN learns the HL prefix according to the RA message.

Or,

after finishing MIPv6 registration, the AR where the PMIPv6Client is located actively sends RA information carrying HL prefix to the MN, and the MN learns the HL prefix according to the RA information.

Step 811, automatically configure the HoA/DHCPv6 configuration.

The MN automatically configures the HoA according to the learned HL prefix; the MN may initiate a stateless DHCPv6 to obtain IP host configuration information.

According to the connection establishment process of the PMIPv6 user shown in fig. 8, another connection establishment process based on the automatically configured PMIPv6 user provided by the present invention is shown in fig. 9, and the connection establishment process of the user supports multiple hosts of a MIMAX system, where HA is in a V-NSP scenario, and for HA is in an H-NSP scenario, it only needs to remove V-AAA in fig. 9.

The process of establishing connection by the user shown in fig. 9 also includes steps 81 to 811 of the process of establishing connection by the PMIPv6 user shown in fig. 8, and in the process of establishing connection by the user shown in fig. 9, the G-MS/G-RS relays messages between the host device and the ASN, such as a request message for a Neighbor node IPv6Neighbor Solicitation, a Neighbor broadcast message Neighbor Advertisement, a Router request message Router Solicitation, or a Router broadcast message Router Advertisement. The relay is made to ensure the IP logic Link between the AR where the MN (G-Host) and the PMIPv6Client are located.

Another process for establishing a connection based on an automatically configured PMIPv6 user according to the present invention is shown in fig. 10, and supports the case where PMIPv6Client CP and PMIPv6Client DP are separated.

The PMIPv6 user connection establishment procedure shown in fig. 10 includes the following steps:

step 101, access authentication.

Step 102, automatically configuring the LLA and the DAD.

Once a data path between the MN and the PMIPv6Client DP is established, the MN starts to carry out LLA automatic configuration; after the MN performs LLA automatic configuration, a Neighbor Solicitation message is initiated, DAD is performed on the LLA, and the Neighbor Solicitation message contains the tentative LLA.

PMIPv6Client DP supports Proxy DAD of LLA, establishes and maintains Proxy MN IP Address Cache, PMIPv6Client DP can learn MN LLA from MN NeighborSolitization message; PMIPv6Client DP compares the addresses in latent LLA and Address cache; if there is a match, sending a ProxyNeighbor Advertisements message instead of the matching address owner; if there is no match, then only the tentative LLA is added to the Address Cache.

Step 103, HoA and CoA generation.

PMIPv6Client DP extracts the interface identifier from LLA, and attaches the identifier to the prefix broadcasted by the AR to the CMIPv6 node to generate CoA of MN;

the PMIPv6Client DP may also use the IP address of the AR where the Client DP is located as the CoA of the MN, i.e. different MNs of the PMIPv6Client DP proxy will use the same CoA, which may bring additional requirements to the HA, requiring that the HA cannot support CoA uniqueness checking on the MN.

PMIPv6Client DP sends registration start message to PMIPv6Client CP, the registration start message includes CoA or LLA of MN.

If the HoA is given by the Authenticator, the PMIPv6Client DP can be directly used; otherwise, PMIPv6Client DP extracts the interface identifier from CoA or LLA, attaches it after HL prefix, and generates HoA of MN.

Step 104-step 108, MIPv6 registration and proxy DAD.

After CoA generation and HoA acquisition of the MN, the PMIPv6Client CP may initiate a MIPv6 registration message BU; MIPv6BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. security services, such as MN-AAA authentication mobility options.

The HA needs Proxy DAD (Proxy DAD) to support HoA; after the HA replaces the MN to finish DAD, responding a binding confirmation message to the PMIPv6Client CP;

step 109, the PMIPv6Client CP sends a registration success message to the PMIPv6Client DP, and notifies the PMIPv6 that the Client DP is successfully registered, where the registration success message includes the HL prefix.

Step 1010-step 1011, router discovery.

The MN initiates an RS (router solicitation) message, requests RA (router advertisement) message response of an AR where PMIPv6Client DP is located, so as to learn on-link prefix; after the PMIPv6 AR where the Client DP is located successfully registers in the MIPv6 (the HoA passes through the Proxy DAD of the HA), the RA schottky barrier carrying the HL prefix is sent to the MN, and the MN learns the HL prefix according to the RA schottky barrier.

Or,

after finishing MIPv6 registration, the AR where the PMIPv6Client DP is located actively sends RA messages carrying HL prefix to the MN, and the MN learns the HL prefix according to the RA messages.

Step 1012, automatically configuring the HoA/DHCPv6 configuration.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A system for realizing mobile IPv6, comprising a home agent, characterized in that it also includes:

IP proxy mobile IP version 6 client PMIPv6 Client: set in the access service network ASN or mobile gateway or mobile bridge, and perform mobile IPv6 functions on behalf of the mobile node MN by performing information exchange with the home agent.

2. The system according to claim 1, wherein said PMIPv6 Client comprises:

PMIPv6 client control plane PMIPv6 Client CP: Proxy MN performs the control plane function of Mobile IPv6;

PMIPv6 client data plane PMIPv6 Client DP: set on the data path between the MN and the home agent HA, the proxy MN performs the data plane function of mobile IPv6.

3. The system according to claim 2, characterized in that:

Described PMIPv6 Client CP acts on behalf of MN to perform mobile detection, care-of address CoA generation and return home;

The PMIPv6 Client CP proxies the MN to perform processing on the Mobility Headers;

Described PMIPv6 Client CP acts as an agent MN to carry out binding to update the sending of Binding Updates message;

Described PMIPv6 Client CP acts as an agent MN to carry out binding and confirms the reception and processing of the BindingAcknowledgements message;

Described PMIPv6 Client CP acts as an agent MN to carry out the reception of binding refresh request Binding RefreshRequest message, and sends binding to update Binding Update message as response;

The PMIPv6 Client CP acts as an agent for the MN to receive the Mobile Prefix Advertisements message, and includes the prefix information in the Mobile Prefix Advertisement message in the RouterAdvertisement message sent to the MN.

4. The system according to claim 3, characterized in that:

Described PMIPv6 Client CP acts on behalf of MN to carry out the reception to binding error message;

and / or,

Described PMIPv6 Client CP acts on behalf of MN to carry out the reception to Internet Control Message Protocol ICMP error message;

and / or,

The PMIPv6 Client CP proxy MN executes return routing capability procedure return routabilityprocedure;

and / or

The PMIPv6 Client CP acts as a proxy for the MN to perform the discovery of the dynamic home address HA address.

5. The system according to claim 2, wherein said PMIPv6 Client CP acting as an agent for MN to perform mobile detection specifically includes:

For the global interactive microwave access WiMAX network, the mobile detection can be assisted by the radio resource management module or the handover control module.

6. The system according to claim 1, further comprising an authenticator and an authentication, authorization, and accounting AAA server, the PMIPv6 Client CP and the authenticator are placed together, and the PMIPv6 Client CP and the HA Obtain the key required by PMIPv6 through the authenticator and AAA server.

7. The system of claim 2, wherein:

Described PMIPv6 Client DP acts on behalf of MN to carry out IPv6 tunnel encapsulation and decapsulation;

Described PMIPv6 Client DP acts as the agent MN to carry out opening and closing of routing optimization.

8. The system of claim 7, wherein:

Described PMIPv6 Client DP acts as an agent MN to carry out the packet sending that contains hometown address HoA option, the interaction of IP security protocol IPsec;

and / or,

Described PMIPv6 Client DP agent MN carries out the multicast address listener of multicast group member agreement, receives the tunnel multicast packet from HA;

and / or,

Described PMIPv6 Client DP acts as an agent MN to carry out 2 types of routing header routing header processing;

and / or,

Described PMIPv6 Client DP establishes and maintains the address pool of the MN of agency;

and / or,

For the wireless network, the PMIPv6 Client DP supports Proxy DAD, and replaces the MN to perform the DAD function.

9. The system according to claim 2, wherein the PMIPv6 Client CP and PMIPv6 Client DP are placed in the same AR, or in different ARs.

10. The system according to claim 1, wherein said MN comprises a mobile station and a host device.

11. The system according to claim 1, wherein the mobile IPv6 system is applicable to the Multiple Hosts architecture of the WIMAX system, and the WIMAX system includes: a host device, a mobile gateway or a mobile bridge, and The interconnected access service network ASN and connection service network CSN, mobile gateway or mobile bridge are connected with each host device through the first interface, and connected with the ASN through the second interface.

12. The system according to claim 11, wherein the mobile gateway includes: a gateway mobile station G-MS or a gateway transfer station G-RS, and the mobile bridge includes: a bridge mobile station or a network bridge Bridge transfer station.

13. A method for establishing a PMIPv6 user connection, comprising the steps of:

A. Perform access authentication on the MN;

B. The MN automatically configures the link-local address LLA, and performs DAD on the LLA;

C. PMIPv6 Client generates CoA of MN and completes MIPv6 registration.

14. The method according to claim 13, wherein said step A specifically comprises:

The PMIPv6 Client obtains the AAA key, HA address and HoA or DHCP server address by exchanging AAA access authentication messages with the MN's home H-AAA server.

15. The method according to claim 13, characterized in that said step B specifically comprises:

Once the data path between MN and PMIPv6 Client is established, MN starts to automatically configure LLA; after MN automatically configures LLA, it initiates a Neighbor Solicitation message to perform DAD on LLA, and the Neighbor Solicitation message contains experimental tentativeLLA;

PMIPv6 Client establishes and maintains the proxied MN IP Address Cache; compares the LLA with the address in the Address Cache, and if there is a match, sends a Proxy Neighbor Advertisements message instead of the matching address owner; otherwise, adds the LLA to the AddressCache.

16. The method according to claim 14, wherein said step C specifically comprises:

C1. When the authenticator obtains the DHCP server address during the access process, DHCPProxy/Relay downloads the DHCP server address and MN identifier from the authenticator; or, statically configures the DHCP server address;

C2, MN utilizes DHCPv6 to carry out MN HoA allocation and IP host configuration;

C3, PMIPv6 Client obtains HoA of MN from DHCP Proxy/Relay;

C4. The PMIPv6 Client obtains the interface identifier from the LLA, and attaches it to the prefix that the AR broadcasts to the CMIPv6 node to generate the CoA of the MN; or, the PMIPv6 Client uses the IP address of the AR as the CoA of the MN;

C5, PMIPv6 Client sends the MIPv6 registration message including MN's HoA, CoA and security information, and HA responds with a binding confirmation message to PMIPv6 Client.

17. The method according to claim 16, characterized in that said step C2 specifically comprises:

The MN sends a DHCPv6 Solicit message; the DHCP Proxy/Relay forwards the received DHCPv6 Solicit message to the DHCP server, and forwards the DHCPv6 Advertise message responded by the DHCP server to the MN; the MN selects the required DHCP server and responds to the DHCPv6 Request message through the DHCP Proxy/Relay To the selected DHCP Server, the DHCP Server sends a DHCPv6 Reply message containing HoA and IP host configuration options to DHCP Proxy/Relay;

or,

MN sends a DHCPv6 Solicit message; DHCP Proxy/Relay responds to DHCPv6Advertise message to MN; MN responds to DHCPv6 Request message to DHCP Proxy/Relay.

18. The method according to claim 16, characterized in that the step C3 specifically comprises:

After the DHCP Proxy/Relay obtains the HoA of the MN through the DHCPv6 method, the HoA is sent to the PMIPv6 Client through the HoA Address source language, which contains the MN identifier.

19. The method according to claim 14, characterized in that said step C specifically comprises:

C7. When the PMIPv6 Client obtains the HoA of the MN during the access process, the PMIPv6 Client obtains the interface identifier from the LLA, and attaches it to the prefix broadcasted by the AR to the CMIPv6 node to generate the CoA of the MN; or, the PMIPv6 Client Use the IP address of the AR as the CoA of the MN;

C8. The PMIPv6 Client sends the MIPv6 registration message containing the MN's HoA, CoA and security information to the HA, and the HA responds with a binding confirmation message to the PMIPv6 Client.

20. The method according to claim 16 or 19, characterized in that the steps C5 and C8 further include:

After completing the MIPv6 registration, send a DHCP_Gating.Release message to release the DHCP gating function. The DHCP gating function is used to prevent the MN from initiating IP communication before the end-to-end data path is established; after the R3 session is established, the DHCP Proxy/Relay Send a DHCP v6 Reply message to the MN.

21. The method according to claim 16, 17, 18 or 19, characterized in that said step C further comprises:

When ASN/G-MS/G-RS supports PMIPv6 and CMIPv6 dual-mode, DHCP Proxy/Relay notifies ASN Fn of the MIP mode adopted by R3_Mobility_Context message.

22. The method according to claim 16, 17, 18 or 19, characterized in that said step C further comprises:

When the initial connection is established, after the PMIPv6 Client sends the MIPv6 registration message to the HA, before the HA responds with the binding confirmation message to the PMIPv6 Client, the HA interacts with the H-AAA to obtain the MN-HA key and the PMIPv6 Client-HA key .

23. The method according to claim 13, wherein the method is applicable to the scenario where the HA is in the V-NSP of the visited network service provider or the H-NSP of the home network service provider.

24. A method for establishing a PMIPv6 user connection, comprising the steps of:

D. Perform access authentication on the MN;

E. The MN automatically configures the link-local address LLA, and performs DAD on the LLA;

F. PMIPv6 Client generates MN's CoA, completes MIPv6 registration, and acts as an agent for DAD;

G. MN automatically configures HoA through router discovery.

25. The method according to claim 24, wherein said step D specifically comprises:

The PMIPv6 Client obtains the AAA key, HA address, and HL prefix by exchanging AAA access authentication messages with the MN's H-AAA server.

26. The method according to claim 25, wherein said step D further comprises:

The PMIPv6 Client obtains the HoA of the MN by exchanging AAA access authentication messages with the H-AAA server of the MN.

27. The method according to claim 24, characterized in that said step E specifically comprises:

Once the data path between the MN and the PMIPv6 Client is established, the MN starts to perform LLA automatic configuration; after the MN performs LLA automatic configuration, it initiates a Neighbor Solicitation message to perform DAD on the LLA, and the Neighbor Solicitation message includes tentative LLA;

28. The method according to claim 24, characterized in that said step F specifically comprises:

F1. When the authenticator obtains the HoA of the MN during the access process, the PMIPv6 Client obtains the HoA directly from the authenticator; otherwise, the PMIPv6 Client extracts the interface identifier from the LLA and appends it to the HL prefix to generate the MN HoA; PMIPv6 Client attaches the interface identifier to the prefix that the AR broadcasts to the CMIPv6 node to generate the CoA of the MN, or uses the IP address of the AR as the CoA of the MN;

F2. The PMIPv6 Client sends the MIPv6 registration message including the MN's HoA, CoA and security information; after the HA replaces the MN to complete the DAD, it responds with a binding confirmation message to the PMIPv6 Client.

29. The method according to claim 28, characterized in that said step F further comprises:

30. The method according to claim 24, 25, 26, 27, 28 or 29, wherein said step G specifically comprises:

The MN sends a router request message. After the AR where the PMIPv6 Client is located successfully registers with MIPv6, it responds to the MN with a router advertisement message carrying the HL prefix. The MN learns the HL prefix according to the router advertisement message, and automatically configures HoA according to the HL prefix;

or,

After completing the MIPv6 registration, the AR where the PMIPv6 Client is located actively sends a router advertisement message carrying an HL prefix to the MN. The MN learns the HL prefix according to the router advertisement message, and automatically configures HoA according to the HL prefix.

31. The method according to claim 30, characterized in that said step G further comprises:

The MN initiates stateless DHCPv6 to obtain configuration information of the IP host.

32. The method of claim 31, further comprising:

The method is applicable to the Multiple Hosts architecture of the WIMAX system, and the WIMAX system includes: a host device, a mobile gateway or a mobile bridge, and an interconnected ASN and a CSN, and the mobile gateway or the mobile bridge communicates with each host through the first interface A host device is connected to the ASN through a second interface, and the mobile gateway or mobile bridge transfers messages between the host device and the ASN.

33. The method according to claim 32, wherein the message between the host device and the ASN includes: a neighbor node request message IPv6 Neighbor Solicitation, a neighbor node broadcast message Neighbor Advertisement, a router request message Router Solicitation or a router Broadcast message Router Advertisement.

34. The method according to claim 24, characterized in that said step E specifically comprises:

Once the data path between the MN and the PMIPv6 Client DP is established, the MN starts to automatically configure the LLA; after the MN automatically configures the LLA, it initiates a Neighbor Solicitation message to perform DAD on the LLA, and the Neighbor Solicitation message contains tentative LLA;

PMIPv6 Client DP supports the proxy DAD of LLA, establishes and maintains the proxy MN IPAddress Cache, PMIPv6 Client DP learns the LLA of the MN from the Neighbor Solicitation message of the MN; PMIPv6 Client DP compares the address in the tentative LLA and Address Cache; if exists If there is a match, the Proxy NeighborAdvertisements message is sent instead of the owner of the matching address; if there is no match, only the tentative LLA is added to the AddressCache.

35. The method according to claim 24, characterized in that said step F specifically comprises:

F3, PMIPv6 Client DP obtains the interface identification from the LLA, and attaches the interface identification to the prefix broadcast to the CMIPv6 node by the AR to generate the CoA of the MN, or uses the IP address of the AR as the CoA of the MN;

F4, PMIPv6 Client DP sends the registration initiation message that includes MN's CoA or LLA to PMIPv6 Client CP, starts the MIPv6 registration process;

F5, if PMIPv6 Client DP has obtained the HoA of MN, then PMIPv6 Client DP directly uses this HoA; Otherwise, PMIPv6 Client DP obtains interface identification from described LLA or CoA, and this interface identification is attached after HL prefix and generates the HoA of MN ;

F6, PMIPv6 Client CP sends a MIPv6 registration message containing MN's HoA, CoA and security information, and after HA completes DAD instead of MN, it responds with a binding confirmation message to PMIPv6 Client CP; PMIPv6 Client CP sends a registration success message to PMIPv6 Client DP.

36. The method according to claim 24, 25, 26, 34 or 35, wherein said step G specifically comprises:

The MN sends a router request message. After the AR where the PMIPv6 Client DP is located successfully registers with MIPv6, it responds to the MN with a router advertisement message carrying the HL prefix. The MN learns the HL prefix according to the router advertisement message, and automatically configures HoA according to the HL prefix;

or,

After completing the MIPv6 registration, the AR where the PMIPv6 Client DP is located actively sends a router advertisement message carrying an HL prefix to the MN. The MN learns the HL prefix according to the router advertisement message, and automatically configures HoA according to the HL prefix.

37. The method according to claim 36, characterized in that said step G further comprises:

38. The method of claim 36, further comprising:

39. The method according to claim 38, wherein the message between the host device and the ASN includes: IPv6 Neighbor Solicitation, Neighbor Advertisement, Router Solicitation or Router Advertisement.