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

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 and user connection establishment method for realizing mobile IPv6

technical field

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

Background technique

BWA (Broadband wireless access, broadband wireless access) equipment can provide users with convenient broadband access methods. Currently, there are broadband wireless access devices based on proprietary protocols and broadband wireless access devices based on standard protocols. The broadband wireless access equipment defined by the IEEE (Institute of Electrical and Electronics Engineers) 802.16 standard is a subset of a series of standards for broadband wireless access technologies. BWA equipment includes WIMAX (Worldwide Interactive Microwave Access) equipment.

The Multiple Hosts (Multiple Hosts) architecture defined by the WiMAX Forum based on G-RS (Gateway Relay Station)/G-MS (Gateway Mobile Station) is shown in Figure 1. The G-RS/G-MS is connected to multiple G-Hosts through the first interface, and connected to the ASN (Access Service Network) through the second interface. Wherein, the first interface is a G-interface interface, and the G-interface adopts 802.3 or 802.11 Layer 2 transmission technology; the second interface is an R1 interface, and R1 adopts 802.16e wireless Layer 2 transmission technology. ASN and CSN (connection service network) are connected through R3 reference point, CSN of NAP+V-NSP (network access provider and visited network service provider) and CSN of H-NSP (home network service provider) are connected through the R5 reference point.

In the WIMAX IPv6 network, the CMIPv6 (IP Client Mobile IPv6) standard MIPv6 (IP Client Mobile IPv6) is currently used, see RFC 3775. MIPv6 involves three functional entities HA (Home Agent), MN (Mobile Node) and CN (Peer Communication Node). The client of CMIPv6 is located at MS/G-Host. During the moving process of R3, MS/G-Host performs (full state or stateless) address auto-configuration, and takes this newly formed address as its CoA (care-of address).

MS/G-Host performs HoA registration and registers its CoA with the HA on its home link, MS/G-Host sends a data packet containing the "binding update" purpose option to its HA, and HA registers the binding Set and return to MS/G-Host a packet containing the "binding confirmation" purpose option. The HA intercepts all data packets whose address is the home address of the MS/G-Host, and each intercepted data packet is encapsulated with IPv6 and sent to the care-of address registered by the mobile node using tunnel technology.

A method of communication between communication nodes in the prior art above-mentioned WIMAX IPv6 network is: if a communication node wants to communicate with another MS/G-Host that leaves the home network, the routing process of the data packet is: from the communication node To HA, from HA to MS/G-Host, and then from MS/G-Host to another communication node leaving the home network. This routing method is often called triangular routing. In order to avoid triangular routing problems, MS/G-Host can send a binding update carrying the current CoA to any communication node, and the communication node will cache the current CoA carried in the binding update and send the data packet directly to the MS /G-Host.

The disadvantages of the above method are:

1. This method requires the MS to implement Mobile IPv6, and the MS that only supports Simple IPv6 (Simple IPv6) cannot be used, resulting in complicated MS functions;

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

3. Since 3G networks (such as WCDMA) do not support CMIPv6, communication according to this method makes the interconnection of WiMAX and 3G networks (such as WCDMA) a problem;

4. Since G-Host and G-MS/G-RS are usually mobile networks set up on trains, cars or ships, G-Host is often a terminal used by fixed passengers relative to G-MS/G-RS. Generally, the Mobile IPv6 function cannot be realized, so that this method cannot be used in the existing WiMAX mobile Multihost network.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a system for implementing Mobile IPv6 and a method for establishing a user connection thereof, so that MSs that only support Simple IPv6 can be implemented without implementing Mobile IPv6.

The purpose of the present invention is achieved through the following technical solutions:

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

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 exchanging information with the home agent.

The PMIPv6 Client includes:

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.

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;

Described PMIPv6 Client CP agent MN carries out the reception of mobile prefix advertisement Mobile PrefixAdvertisements message, and includes the prefix information in the mobile prefix advertisement message in the router advertisement RouterAdvertisement message sent to MN;

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.

Described PMIPv6 Client CP agent MN carries out mobile detection and 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.

Also include authenticator and verification, authorization, billing AAA server, described PMIPv6 Client CP and authenticator are placed together, described PMIPv6 Client CP and HA obtain the key needed by PMIPv6 by authenticator and AAA server.

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

The opening and closing of the PMIPv6 Client DP agent MN performing routing optimization;

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.

The PMIPv6 Client CP and PMIPv6 Client DP are placed in the same AR, or respectively placed in different ARs.

The MN includes a mobile station and a host device.

The described mobile IPv6 system is applicable to the multiple hosts 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 access service network ASN and a connection service network CSN, mobile A gateway or a mobile bridge is connected to each host device through a first interface, and connected to the ASN through a second interface.

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 bridge transfer station.

A method for establishing a PMIPv6 user connection, comprising steps:

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.

Described 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.

Described 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.

Described 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.

Described 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.

Described 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.

Described 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.

Described step C5, step C8 also 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 DHCPv6 Reply message to the MN.

Described step C also includes:

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.

Described step C also includes:

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 .

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.

A method for establishing a PMIPv6 user connection, comprising steps:

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.

Described 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.

Described step D also comprises:

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

Described 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;

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.

Described 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 CMI IPv6 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.

Described step F also includes:

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 .

Described 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.

Described step G also comprises:

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

Also includes:

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.

The message between the host device and the ASN includes: a neighbor node request message IPv6 NeighborSolicitation, a neighbor node broadcast message Neighbor Advertisement, a router request message Router Solicitation or a router broadcast message Router Advertisement.

Described 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.

Described 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.

Described 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 the HL prefix to the MN. The MN learns the HL prefix according to the router advertisement message, and automatically configures the HoA according to the HL prefix.

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

Also includes:

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.

The message between the host device and the ASN includes: IPv6 Neighbor Solicitation, Neighbor Advertisement, Router Solicitation or Router Advertisement.

As can be seen from the technical scheme provided by the present invention above, the present invention increases a new functional entity PMIPv6 Client (PMIPv6 client) at ASN or G-MS/G-RS by proposing the mechanism of Proxy MIPv6, which has the following advantages:

1. The MS that only supports Simple IPv6 can be used, and the MS does not need to implement Mobile IPv6, so that the MS functions are simple;

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

3. Since the MS that only supports Simple IPv6 can be used, it can solve the MIP problem when WiMAX and 3G networks (such as WCDMA) are interconnected;

4. Since G-Host that only supports Simple IPv6 can be used, the limitation of WiMAX mobile Multihost is solved.

Description of drawings

Figure 1 is a structural diagram of the Multiple Hosts architecture based on G-RS/G-MS;

Fig. 2 is the functional block diagram of PMIPv6 Client described in the present invention;

Fig. 3 is the protocol stack schematic diagram of the PMIPv6 data plane of the present invention;

Fig. 4 is a schematic diagram of the PMIPv6 data plane protocol stack of the WiMAX network;

Fig. 5 is a schematic diagram of the PMIPv6 data plane protocol stack of the Multihost network based on 802.16 transit;

Fig. 6 is a schematic diagram of the PMIPv6 data plane protocol stack of the Multihost network;

Fig. 7 is the flow chart of a kind of PMIPv6 user connection establishment process based on DHCPv6 described in the present invention;

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

Fig. 9 is a flow chart of the process of establishing a connection for a PMIPv6 user based on automatic configuration according to the present invention;

FIG. 10 is a flow chart of a process of establishing a connection for a PMIPv6 user based on automatic configuration according to the present invention.

Detailed ways

The present invention provides a kind of system and user connection establishment method thereof for realizing mobile IPv6, the core of the present invention is: in ASN or mobile gateway or mobile network bridge, increase new functional entity PMIPv6 Client (PMIPv6 client), pass and authenticator 1. The home agent performs information exchange and performs mobile IPv6 functions on behalf of the MN.

First describe the system of the present invention in detail below, the system of the present invention is based on MIPv6, and its main invention point is to increase a new functional entity PMIPv6 Client at ASN or mobile gateway or mobile network bridge, and is used to perform the mobile IPv6 function on behalf of MN, and The MN only needs to support the simple Simple IPv6 function, and does not need to support the mobile IPv6 function.

The aforementioned mobile bridge includes: a bridge mobile station or a bridge transfer station. In the WiMAX network, the mobile gateway includes: G-MS or G-RS, the MN can be MS or G-Host, and the movement caused by CoA update is transparent to the MN.

The functional block diagram of adding a new functional entity PMIPv6 Client in ASN or G-MS/G-RS provided by the present invention is shown in FIG. 2 . PMIPv6 Client includes two sub-functional entities, PMIPv6 Client CP and PMIPv6 ClientDP.

The PMIPv6 Client CP proxies the MN to perform the control plane functions of Mobile IPv6, such as registration support, and the PMIPv6 Client CP and Authenticator (authenticator) are placed together. PMIPv6 Client CP and HA obtain the key required by PMIPv6 through Authenticator and AAA; during the authentication process, PMIPv6 Client CP and HA obtain the relevant information required for MIP registration through AAA information exchange retrieval.

PMIPv6 Client CP acts on behalf of MN to perform the following control plane functions of Mobile IPv6:

1. Support the reception of Binding Error message (binding error message);

2. Support the reception of ICMP error messages;

3. Support mobile detection, CoA generation and return to the place of origin;

4. Support the processing of Mobility Headers (mobile head);

5. Support return routability procedure (return routing capability procedure);

6. Support the sending of Binding Updates (binding update) messages;

7. Support the reception and processing of Binding Acknowledgements (binding confirmation) messages;

8. Support the reception of Binding Refresh Request (binding refresh request) messages, and respond with Binding Update (binding update) messages;

9. Support the reception of Mobile Prefix Advertisements (mobile prefix advertisement) message, the prefix information in the mobile prefix advertisement message should be included in the Router Advertisement (routing advertisement) message sent to MN;

10. Support dynamic HA address discovery mechanism;

11. For WiMAX network, it supports Proxy DAD (Proxy Duplicate Address Detection).

PMIPv6 Client DP acts as an agent for MN to perform data plane functions of Mobile IPv6, such as tunnel support, and PMIPv6 Client DP is always placed on the data path between MN and HA.

PMIPv6 Client DP should support the following functions:

1. Support sending packets with HoA option, and support Ipsec (IP Security, an IP security protocol) interaction;

2. Support IPv6 tunnel encapsulation and decapsulation;

3. Support 2 types of routing header (routing header) processing;

4. Support the opening and closing of routing optimization;

5. It can support the multicast address listener of the multicast group membership protocol. When it supports the multicast address listener, it should be able to receive the tunnel multicast packet from the HA;

6. Support the establishment and maintenance of the MN IP Address Cache (address pool) that is proxied. For WiMAX networks, it supports Proxy DAD to replace the MN to complete the DAD function.

The above PMIPv6 Client CP and PMIPv6 Client DP can be placed in the same AR, or in different ARs respectively. The different ARs support the MN’s IPv6 neighbor node search and router discovery functions. The different ARs and the MN belong to the same Link (connect).

HA and AAA in FIG. 2 are located in CSN (Connection Service Network), and the functions of HA and AAA are the same as those in the prior art.

The above protocol stack of the PMIPv6 data plane is shown in FIG. 3 , and PMIPv6 supports route optimization. Among them, the data plane processing of HA and CN MIP is the same as that of the prior art.

In the downlink (CN->MN) direction, PMIPv6 Client DP serves as the end point of the MIPv6 tunnel. When PMIPv6 Client DP receives an IP packet from HA or CN, it performs the following processing:

1. Check the outer layer IP destination address of the tunnel to determine whether it is the CoA of the MN acting as an agent, if yes, receive the IP packet for subsequent processing; otherwise, discard the IP packet.

2. Perform detunnel encapsulation processing on the received IP packets.

3, check the inner layer IP destination address of the tunnel of the IPv6 packet after the detunnel encapsulation, determine whether this address is the HoA (home address) of the MN of its agent, if yes, then send the IPv6 packet after the detunnel encapsulation to MN; otherwise, discard the IP packet.

In the uplink (MN->CN) direction, when PMIPv6 does not support reverse tunnel function, PMIPv6 Client DP completes the function of router for all IPv6 packets sent by visiting MN; when PMIPv6 supports reverse tunnel function, PMIPv6 As the starting point of the MIPv6 reverse tunnel, the Client DP processes the IPv6 packets sent by all visiting MNs as follows:

1. Check the IP source address of the IPv6 packet to determine whether it is the HoA of the agent MN, if not, directly route the received IP packet and send it out; if yes, tunnel the received IP packet Encapsulation processing, adding an outer layer IP header with the CoA of the MN as the source address and the IPv6 address of the HA or CN as the destination address for subsequent processing;

2. For the IP packet processed by tunnel encapsulation, route it according to the outer layer IP header and send it out.

The implementation of the above PMIPv6 data plane protocol stack in the WiMAX network is shown in Figure 4-6. Figure 4 is a schematic diagram of the PMIPv6 data plane protocol stack of the WiMAX network, Figure 5 is a schematic diagram of the PMIPv6 data plane protocol stack of the Multihost network based on 802.16 transit, and Figure 6 is a schematic diagram of the PMIPv6 data plane protocol stack of the Multihost network.

In Figure 4, the PMIPv6 Client DP is located in the ASN, the MS and the PMIPv6 Client DP are connected through 802.16R1, and the tunnel (DP) between the BS and the PMIPv6 Client DP constitutes an IPv6 logical link.

In Figure 5, the PMIPv6 Client DP is located in the ASN and supports the MultipleHosts function based on 802.16 transit. The MS and the PMIPv6 Client DP are connected through 802.16G-Interface, R1, and the tunnel (DP) between the BS and the PMIPv6 Client DP constitutes an IPv6 tunnel. Logical Link.

In Figure 6, PMIPv6 Client DP is located in G-MS/G-RS and supports the Multiple Hosts function based on G-MS/G-RS.

The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

In terms of PMIPv6 signaling plane processing, a process flow of a PMIPv6 user connection establishment process based on DHCPv6 (Dynamic Host Configuration Protocol IPv6) is shown in Figure 7, wherein the HA is in the V-NSP (visited network service provider), and for the HA In the H-NSP (Home Network Service Provider) scenario, it is only necessary to remove the V-AAA in Figure 7.

The flow process of the PMIPv6 user connection establishment process shown in Figure 7 comprises the following steps:

Step 71, access authentication.

In the access authentication process, it is decided whether the network assigns HoA to the MN; the PMIPv6 Client obtains the AAA key, HA address, and HoA or DHCP server address.

Step 72, automatically configure LLA (Link-Local Address) and DAD (Duplicate Address Detection).

Once the data path between the MN and the PMIPv6 Client 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 (experimental) LLA.

PMIPv6 Client supports LLA's Proxy DAD (proxy DAD), establishes and maintains the proxy MN IP Address Cache, PMIPv6 Client can learn MN's LLA from MN's Neighbor Solicitation message; PMIPv6 Client compares tentative LLA with the address in Address Cache ; If there is a match, send the Proxy NeighborAdvertisements message instead of the owner of the matching address; if there is no match, only add the tentative LLA to the AddressCache.

Step 73, DHCP server configuration.

If the Authenticator has obtained the DHCP server address in the above step 71, then the DHCPProxy/Relay can download the DHCP server address and the MN identification (MAC address) from the Authenticator; the DHCP Proxy/Relay can also statically configure the DHCP server address, and perform steps 74-77 ; Otherwise, execute step 78-step 79. Step 74-Step 77, IP address allocation and IP host configuration.

In the PMIPv6 scheme, the MN is transparent to IP mobility, and the MN uses DHCPv6 for MNHoA allocation and IP host configuration; the MN initiates a DHCPv6 Solicit message to find an available DHCP server; after receiving the DHCPv6 Solicit message, the DHCP Proxy/Relay sends the message Relay to the DHCP server; any DHCP server that can meet the requirements of the MN can respond to the DHCPv6Advertise message to the DHCP Proxy/Relay; the DHCP Proxy/Relay relays the DHCPv6Advertise message to the MN; the MN selects a suitable DHCP server, and then sends a DHCPv6Request message via the DHCP Proxy/Relay To DHCP Server; DHCP Server generates a DHCPv6 Reply message, which contains HoA and IP host configuration options, and sends it to DHCPProxy/Relay. The steps in the dashed boxes in Fig. 7 are optional steps.

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.

Execute step 78-step 79.

Step 78-Step 79.

For the case where ASN/G-MS/G-RS supports PMIPv6 and CMIPv6 dual-mode, DHCPProxy/Relay notifies ASN Fn of the MIP mode adopted by R3_Mobility_Context message; if ASN/G-MS/G-RS only supports PMIPv6, this step Can be omitted;

Step 710, CoA generation.

The PMIPv6 Client extracts the interface identifier (interface identifier) from the LLA, attaches it to the prefix that the AR broadcasts to the CMIPv6 node, and generates the CoA of the MN;

The PMIPv6 Client can also use the IP address of the AR where it is located as the CoA of the MN, that is, different MNs proxied by the PMIPv6Client will use the same CoA, which will bring additional requirements to the HA, requiring the HA to not support the CoA uniqueness check on the MN.

Step 711-Step 712.

After the DHCP Proxy/Relay obtains the HoA through the above-mentioned DHCPv6 or AAA method, it sends the HoA to the PMIPv6 Client through the HoA Address primitive (source language). The HoA_Address primitive language contains the MN identifier (MAC address).

Step 713-step 716, MIPv6 registration

After MN's CoA is generated and HoA is obtained, PMIPv6 Client can initiate MIPv6 BU (registration message), and MIPv6 BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. Security credentials (security information), such as MN-AAA authentication mobile option.

HA responds with binding confirmation message to PMIPv6 Client;

Among them, steps 714-715 are optional. When the initial connection is established, after the PMIPv6 Client sends the MIPv6 registration message to the HA, and before the HA responds to the binding confirmation message to the PMIPv6 Client, the HA interacts with the H-AAA to obtain the MN -HA key and PMIPv6 Client-HA key.

Step 717-step 718, DHCP response:

After successful MIPv6 registration, PMIPv6 Client sends a DHCP_Gating.Release message, and then DHCP Proxy/Relay sends a DHCPv6 Reply message to the MN after the R3 session (session) is established; DHCP Gating (gate control) is used to prevent the MN from end-to-end IP communication is initiated before the path is established.

A process of establishing a connection for a PMIPv6 user based on automatic configuration provided by the present invention is shown in Figure 8, wherein the HA is in the V-NSP scenario, and for the HA in the H-NSP scenario, only need to remove the V-AAA in Figure 8 Can.

The flow process of the PMIPv6 user connection establishment process shown in Figure 8 comprises the following steps:

Step 81, access authentication.

During the access authentication process, it is decided whether the network assigns HoA to the MN; the PMIPv6 Client obtains the AAA key, HA address, HL prefix, and HoAs. The above-mentioned HoA of the MN is optional.

Step 82, automatically configure LLA and DAD.

Once the data path between the MN and the PMIPv6 Client 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 includes tentative LLA.

PMIPv6 Client supports LLA's Proxy DAD (proxy DAD), establishes and maintains the proxy MN IP Address Cache, PMIPv6 Client can learn MN's LLA from MN's Neighbor Solicitation message; PMIPv6 Client compares tentative LLA with the address in Address Cache ; If there is a match, send the Proxy NeighborAdvertisements message instead of the owner of the matching address; if there is no match, only add the tentative LLA to the AddressCache.

Step 83, HoA and CoA are generated.

If in the above-mentioned step 81, the authenticator has obtained the HoA of the MN, then the PMIPv6 Client directly obtains the HoA from the authenticator; otherwise, the PMIPv6 Client extracts the interfaceidentifier from the LLA, appends it after the HL prefix, and generates the HoA of the MN;

The PMIPv6 Client extracts the interface identifier from the LLA, appends it to the prefix that the AR broadcasts to the CMIPv6 node, and generates the CoA of the MN;

The PMIPv6 Client can also use the IP address of the AR where it is located as the CoA of the MN, that is, different MNs proxied by the PMIPv6Client will use the same CoA, which will bring additional requirements to the HA, requiring the HA to not support the CoA uniqueness check on the MN.

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

After obtaining the CoA and HoA of the MN, the PMIPv6 Client can initiate the MIPv6 registration message BU; the MIPv6BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. Security credentials, such as MN-AAA authentication mobile option. HA needs to support HoA's Proxy DAD (proxy DAD); after HA completes DAD instead of MN, it responds with a binding confirmation message to PMIPv6 Client;

Step 85-Step 86. This step is optional. When the initial connection is established, after the PMIPv6 Client sends the MIPv6 registration message to the HA, and before the HA responds with a binding confirmation message to the PMIPv6 Client, the HA interacts with H-AAA to obtain MN-HA key and PMIPv6 Client-HA key.

Step 89-Step 810, router discovery.

The MN initiates an RS (Router Solicitation) message, requesting a response from the RA (Router Advertisement) message of the AR where the PMIPv6 Client is located, so as to learn the on-link prefix; after the AR where the PMIPv6 Client is located successfully registers with MIPv6 (HoA has passed the Proxy DAD of the HA), it sends a message to the MN The RA message carrying the HL prefix is sent, and the MN learns the HL prefix according to the RA message.

or,

After completing the MIPv6 registration, the AR where the PMIPv6 Client is located actively sends an RA message carrying the HL prefix to the MN, and the MN learns the HL prefix according to the RA message.

Step 811, automatically configure HoA/DHCPv6 configuration.

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

According to the process of establishing a connection for a PMIPv6 user shown in Figure 8, another process of establishing a connection for a PMIPv6 user based on automatic configuration provided by the present invention is shown in Figure 9. The process of establishing a connection for this user supports the Multihosts of the MIMAX system, where HA In the V-NSP scenario, for the HA in the H-NSP scenario, just remove the V-AAA in Figure 9.

The process of establishing a connection for a user shown in FIG. 9 also includes Step 81-Step 811 of the process for establishing a connection for a PMIPv6 user shown in FIG. 8. In the process of establishing a connection for a user shown in FIG. The RS relays messages between the host device and the ASN, such as the neighbor node request message IPv6 Neighbor Solicitation, the neighbor node broadcast message Neighbor Advertisement, the router request message Router Solicitation or the router broadcast message Router Advertisement. Transit to ensure the IP logical link between the MN (G-Host) and the AR where the PMIPv6 Client is located.

Another process of establishing a connection for a PMIPv6 user based on automatic configuration provided by the present invention is shown in FIG. 10 . This process supports the separation of PMIPv6 Client CP and PMIPv6 Client DP.

The flow process of the PMIPv6 user connection establishment process shown in Figure 10 comprises the following steps:

Step 101, access authentication.

During the access authentication process, it is decided whether the network assigns HoA to the MN; the PMIPv6 Client obtains the AAA key, HA address, HL prefix, and HoAs. The above-mentioned HoA of the MN is optional.

Step 102, automatically configure LLA and DAD.

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 (proxy DAD) of LLA, establishes and maintains the MN IP Address Cache that is proxied, and PMIPv6 Client DP can learn the LLA of MN from the NeighborSolicitation message of MN; Compare; if there is a match, send the ProxyNeighbor Advertisements message instead of the matching address owner; if there is no match, only add the tentative LLA to the Address Cache.

Step 103, HoA and CoA are generated.

The PMIPv6 Client DP extracts the interface identifier from the LLA, appends it to the prefix that the AR broadcasts to the CMIPv6 node, and generates the CoA of the MN;

PMIPv6 Client DP can also use the IP address of the AR where it is located as the CoA of the MN, that is, different MNs proxied by the PMIPv6Client DP will use the same CoA, which will bring additional requirements to the HA, requiring the HA to not support the CoA uniqueness check on the MN .

The PMIPv6 Client DP sends a registration start message to the PMIPv6 Client CP, and the registration start message includes the CoA or LLA of the MN.

If the HoA has been given by the Authenticator, PMIPv6 Client DP can use it directly; otherwise, PMIPv6 Client DP extracts the interface identifier from CoA or LLA, appends it to the HL prefix, and generates the HoA of the MN.

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

After the MN's CoA is generated and the HoA is obtained, the PMIPv6 Client CP can initiate the MIPv6 registration message BU; the MIPv6BU includes the following information:

1. HoA of MN;

2. CoA of MN;

3. Security credentials, such as MN-AAA authentication mobile option.

HA needs to support HoA's Proxy DAD (proxy DAD); after HA completes DAD instead of MN, it responds with a binding confirmation message to PMIPv6 Client CP;

Step 109: The PMIPv6 Client CP sends a registration success message to the PMIPv6 Client DP to notify the PMIPv6 Client DP that the registration is successful, and the registration success message includes the HL prefix.

Step 1010-step 1011, router discovery.

The MN initiates an RS (Router Solicitation) message and requests the RA (Router Advertisement) message response of the AR where the PMIPv6 Client DP is located to learn the on-link prefix (online prefix); after the AR where the PMIPv6 Client DP is located is successfully registered with MIPv6 (HoA has passed the HA Proxy DAD), send the RA information carrying the HL prefix to the MN, and the MN learns the HL prefix according to the RA information.

or,

After completing the MIPv6 registration, the AR where the PMIPv6 Client DP is located actively sends an RA message carrying the HL prefix to the MN, and the MN learns the HL prefix according to the RA message.

Step 1012, automatically configure HoA/DHCPv6 configuration.

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

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

Claims (39)

1. 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.

2. The system of claim 1, wherein said 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.

3. The system of claim 2, wherein:

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 acts on the MN to execute the receiving of the Mobile prefix advertisement messages, and the routing advertisement messages sent to the MN contain the prefix information in the Mobile prefix advertisement messages.

4. The system of claim 3, wherein:

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.

5. The system of claim 2, wherein the PMIPv6Client CP proxy MN performing mobility detection specifically comprises:

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.

6. The system of claim 1 further comprising an authenticator and an authentication, authorization, accounting AAA server, wherein said PMIPv6Client CP and authenticator are co-located, and said PMIPv6Client CP and HA obtain keys required for PMIPv6 through the authenticator and AAA server.

7. The system of claim 2, wherein:

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

the PMIPv6Client DP acts on and off the routing optimization of the MN.

8. The system of claim 7, wherein:

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.

9. The system of claim 2, wherein the PMIPv6Client CP and the PMIPv6Client DP are located in the same AR or in different ARs, respectively.

10. The system of claim 1, wherein the MN comprises a mobile station and a host device.

11. The system of claim 1, wherein the mobile IPv6 system is adapted for use in a multi-host Multiple Hosts architecture for WIMAX systems, the WIMAX system comprising: 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.

12. The system according to claim 11, wherein said 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.

13. A PMIPv6 user connection establishment method, comprising the steps of:

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.

14. The method according to claim 13, wherein the step a specifically comprises:

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.

15. The method according to claim 13, wherein the step B specifically comprises:

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.

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

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.

17. The method according to claim 16, wherein the step C2 specifically comprises:

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.

18. The method according to claim 16, wherein the step C3 specifically comprises:

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.

19. The method according to claim 14, wherein the step C specifically comprises:

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.

20. The method as claimed in claim 16 or 19, wherein 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 DHCP v6 Reply message to the MN.

21. The method of claim 16, 17, 18 or 19, wherein step C further comprises:

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.

22. The method of claim 16, 17, 18 or 19, wherein step C further comprises:

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.

23. The method of claim 13, wherein the method is applied to a V-NSP scenario of a network service provider at a visited place or a H-NSP scenario of a network service provider at a home place.

24. A PMIPv6 user connection establishment method, comprising the steps of:

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.

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

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

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

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

27. The method according to claim 24, wherein the step E specifically comprises:

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;

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.

28. The method according to claim 24, wherein said step F specifically comprises:

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 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;

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.

29. The method of claim 28, wherein step F further comprises:

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.

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

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, and automatically configures the 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.

31. The method according to claim 30, wherein step G further comprises:

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

32. The method of claim 31, 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.

33. The method of claim 32, wherein the messaging 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.

34. The method according to claim 24, wherein the step E specifically comprises:

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.

35. The method according to claim 24, wherein said step F specifically comprises:

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.

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

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, and the HoA is automatically configured according to the HL prefix;

or,

after the PMIPv6 AR where the Client DP is located finishes MIPv6 registration, the PMIPv6 AR actively sends router advertisement messages carrying HL prefixes to the MN, the MN learns the HL prefixes according to the router advertisement messages, and the HoA is automatically configured according to the HL prefixes.

37. The method according to claim 36, wherein step G further comprises:

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

38. The method of claim 36, 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.

39. The method of claim 38, wherein the messaging between the host device and the ASN comprises: IPv6Neighbor Solicitation, Neighbor Advertisement, Router Solicitation or Router Advertisement.

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