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Method quickly accessing internet in carrier-grade network address translation (CGN) network

An Internet and network technology, applied in the direction of network interconnection, data exchange network, data exchange through path configuration, etc., can solve the problem that the IPv6 rapid deployment solution cannot realize NAT traversal, etc.

Inactive Publication Date: 2013-04-03
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is the technical problem that the IPv6 rapid deployment scheme cannot realize NAT traversal when the IPv4 addresses of the border router and the home gateway are not private addresses located in the same network segment. Method of Fast Internet Access in CGN Network

Method used

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  • Method quickly accessing internet in carrier-grade network address translation (CGN) network
  • Method quickly accessing internet in carrier-grade network address translation (CGN) network
  • Method quickly accessing internet in carrier-grade network address translation (CGN) network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The client accesses the IPv6 site ipv6.google.com outside the 6rd domain (see image 3 A1v6-E1v6 part), at this time, the IPv6 data packet includes a destination address and a source address, and the source address includes: IPv6 prefix, CGN network WAN side IPv4 address, user end equipment CPE facing operator side IPv4 address and client ID, the destination address includes an IPv6 prefix.

[0057] To this end, its upstream direction includes the following steps:

[0058] The user side equipment CPE1 located behind the network address translation equipment CGN equipment receives an IPv6 data packet initiated by the client host connected to it;

[0059] Among them, the data packet includes: the destination address corresponding to the destination website ipv6.google.com, the destination address includes an IPv6 prefix, the source address includes: the IPv6 prefix, the IPv4 address on the WAN side of the CGN network, and the operator-oriented Side IPv4 address and clie...

Embodiment 2

[0066] Clients access clients behind different CPEs in the same CGN network (see image 3 A1v6-A2v6 part)

[0067] To this end, its upstream direction includes the following steps:

[0068] The user side device CPE1 located behind a network address translation device CGN device receives an IPv6 data packet initiated by the client connected to it;

[0069] The CPE1 compares the prefix of the destination address of the IPv6 data packet with the IPv6 prefix provided by the operator, and finds that the first 32 digits of the IPv6 prefix are consistent, indicating that both belong to the same -6RD domain, and there is no need to traverse the BR at this time The device then further compares the embedded IPv4 address part, and finds that the embedded IPv4 address part is also consistent; it means that both belong to the same CGN network.

[0070] In this scenario, the composition of the destination IPv6 address is as follows:

[0071] 32-bit operator IPv6 prefix + 32-bit CGN WAN p...

Embodiment 3

[0077] Clients access clients directly behind CPE3 with IPv4 addresses (see image 3 A1v6-A3v6 part), wherein, its uplink direction includes the following steps:

[0078] The user side device CPE1 located behind a network address translation device CGN device receives an IPv6 data packet initiated by the client connected to it;

[0079] CPE1 compares the operator prefix in the prefix of the IPv6 destination address and finds that the 32-bit prefix is ​​consistent. At this time, it means that the destination host is in the same 6RD domain, that is, accessing the destination host does not need to traverse the BR;

[0080] Next, the CPE1 compares the embedded IPv4 address part, and finds that the embedded IPv4 address part is inconsistent, which means that the two do not belong to the same CGN network.

[0081]At this point, the CPE1 needs to encapsulate the IPv6 data packet in the IPv4 packet, the source address of the IPv4 packet header is the IPv4 address of the port facing t...

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Abstract

The invention discloses a method quickly accessing internet in a carrier-grade network address translation (CGN) network. The method comprises that (1) a first customer premise equipment (CPE) under a network address translation device CGN receives an IPv6 data package sent by a first client-side (Host) connected with the CPE, the IPv6 data package comprise a destination address and a source address, the source address comprises an IPv6 prefix, a CGN network wide area network (WAN) side IPv4 address, an IPv4 address of the CPE facing an operator side and a client-side ID, and the destination address comprises an IPv6 prefix; (2) the first CPE compares the IPv6 prefix of the destination address with that of the source address, executes different routes according to the fact that whether the IPv6 prefixes are the same, and sends the IPv6 data package to a second client-side corresponding to the destination address. The method solves the problem of rapid deployment of 6rd in the CGN network.

Description

technical field [0001] The invention mainly relates to a method for fast Internet access in a CGN network, in particular to a method for quickly deploying IPv6 access in a carrier-level network address translation network. Background technique [0002] IPv6 Rapid Deployment (IPv6 Rapid Deployment, 6rd) is an IPv6-in-IPv4 tunneling technology, which can realize the rapid deployment of IPv6 access by using the IPv4-only network currently owned by operators. [0003] The main idea of ​​IPv6 rapid deployment is to combine the IPv6 prefix obtained by the operator with the IPv4 address of the user's home gateway facing the operator's network side to form a proxy prefix. [0004] Use the IPv4 address embedded in the proxy prefix to realize the routing function of IPv6-in-IPv4 data packets in the operator's original IPv4-only network, and the home gateway that supports IPv6 rapid deployment can provide home users with IPv4 / IPv6 dual protocol stack access. [0005] In the IPv6 rapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L12/46H04L12/749H04L45/741
Inventor 赵钦马严安杰田普连捷闫屾张宇烜罗智
Owner BEIJING UNIV OF POSTS & TELECOMM
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