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Method and system for PMIPv6 protocol to support IPv6 prefix distribution

A technology of prefix allocation and ipv6 protocol, which is applied in the field of communication and can solve problems such as discarded messages, failed messages, and missing messages

Active Publication Date: 2012-07-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How 3GPP supports prefix delegation for PMIP-based S5 / 8, S2a and S2b is currently blank, that is, there is no public plan for PMIPv6 to support prefix delegation
There may be problems: the mobile terminal can obtain the IPv6 prefix from the delegating router through DHCPv6, and DHCPv6 runs on the user plane, which can be said to be transparent to the PMIPv6 network nodes MAG and LMA
When the terminal obtains an additional IPv6 prefix (different from the home network prefix of PMIPv6) on the current IP connection, it will use the IPv6 address belonging to the prefix for subsequent communication, and MAG and LMA do not perceive the IPv6 prefix at this time, that is, MAG There is no corresponding prefix information in the local forwarding table of the LMA, which may cause the failure of forwarding packets containing the delegated prefix (delegated prefix). For example, when the MAG receives a packet from the MN with the delegated prefix as the source address, The message may be discarded because the corresponding binding association cannot be found; or when the MAG does not match the source address and the Home Network Prefix (Home Network Prefix) for the uplink message, the LMA receives a message from the corresponding node (corresponding node) peer When the destination address of the message sent by the communication node to the MN contains the delegated prefix, the LMA may discard the message because it cannot find the corresponding binding association.

Method used

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  • Method and system for PMIPv6 protocol to support IPv6 prefix distribution
  • Method and system for PMIPv6 protocol to support IPv6 prefix distribution
  • Method and system for PMIPv6 protocol to support IPv6 prefix distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 2 As shown, the mobile node MN is connected to the network, and the MAG also acts as a DHCPv6 Relay agent to transfer DHCPv6 messages between the MN and the DHCPv6 Server. Here, it is assumed that the DHCPv6 message needs to be forwarded to the DHCPv6 Server through the LMA, that is, the DHCPv6 Server is behind the LMA (or Co-located with the LMA), the DHCPv6 message is sent to the DHCPv6 Server as PMIPv6 user plane data through the PMIP tunnel. The specific implementation steps are as follows:

[0050] Step 201: the MN is connected to the network, and the network adopts PMIPv6 as the mobility management protocol of the MN, and a PMIP tunnel is established between the MAG and the LMA to complete the PMIPv6-based IP connection between the MN and the network;

[0051] Step 202: The MN sends a DHCPv6 Solicit request to the DHCPv6 Relay agent, and the request message contains one or more IA_PD option(s) (association identifiers of entrusted prefixes) to car...

Embodiment 2

[0058] Such as image 3 As shown, the mobile node MN is connected to the network, and the MAG also acts as a DHCPv6 Relay agent to transfer DHCPv6 messages between the MN and the DHCPv6 Server. Here, the location of the DHCPv6 Server is not limited and may be in any location. For example, the DHCPv6 Server may be behind the LMA ( Or co-located with the LMA), or in the local network, the latter LMA cannot perceive the DHCPv6 process, that is, the DHCPv6 message will not pass through the LMA. At this time, the MAG needs to trigger the PMIP signaling interaction process to notify the LMAdelegated prefix information. The specific implementation steps are as follows:

[0059] Step 301, the MN is connected to the network, the network adopts PMIP as the mobility management protocol of the MN, and a PMIP tunnel is established between the MAG and the LMA to complete the PMIP-based IP connection between the MN and the network;

[0060] Step 302, the MN sends a DHCPv6 Solicit request t...

Embodiment 3

[0068] Such as Figure 4 As shown, the mobile node MN is connected to the network, and the MAG also serves as the DHCPv6 Server to deliver the delegated prefix to the MN. The specific implementation steps are as follows:

[0069] Step 401, the MN is connected to the network, and the network adopts PMIP as the mobility management protocol of the MN, and a PMIP tunnel is established between the MAG and the LMA to complete the PMIP-based IP connection between the MN and the network;

[0070] Step 402, the MN sends a DHCPv6 Solicit request to the Delegating Router, and the request message includes one or more IA_PD option(s) (association identifiers of entrusted prefixes) to carry the IPv6 prefix information to be requested;

[0071] Step 403, the DHCPv6 Server (Delegating Router) receives the request message, and sends the IA_PD option(s) including the issued IPv6 prefix information in the DHCPv6 Advertize notification message to the MN after verification;

[0072] Step 404, th...

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Abstract

The invention discloses a method and a system for PMIPv6 protocol to support IPv6 prefix distribution, solving the technical problem of how to support IPv6 prefix distribution. According to the method for the PMIPv6 protocol to support IPv6 prefix distribution, when a mobile node obtains IPv6 prefix by DHCPv6 prefix entrustment process, the DHCPv6 prefix entrustment process triggers mobile access gateway MAG and local mobile anchor point LMA to correlate the entrustment prefix with the PMIPv6 binding update list entry and PMIPv6 binding cache entry. The method can avoid the condition that the MAG and / or LMA cannot sense IPv6 prefix change to transfer message failure including prefix entrustment in the prior art, and the supporting of the PMIPv6 protocol for IPv6 prefix distribution is realized.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for proxying Mobile Internet Protocol Version 6 (IPv6) to support IPv6 prefix distribution. Background technique [0002] Proxy Mobile IPv6 protocol (Proxy Mobile IPv6, PMIPv6) is a network-based mobile IP management protocol. PMIPv6 does not require mobile devices to participate in any mobility management work. The network is responsible for the mobility management of user equipment. The impact of the three-layer connection. For a mobile node (Mobility Node, MN), no matter where it moves, the MN considers itself to be on a home link (Home Link). Such as figure 1 The shown 3GPP is based on PMIPv6 network architecture and corresponding interfaces. The key nodes and functions of PMIPv6 are as follows: [0003] Local Mobility Anchor (Local Mobility Anchor, LMA): is the home agent (Home Agent) of the mobile node, the topology anchor of the home address of the MN, and...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L29/06
CPCH04W8/08H04W88/04
Inventor 周星月朱春晖
Owner ZTE CORP
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