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Protocol message transmission method, home gateway and CGN (carrier grade network switch) device

A protocol message and home gateway technology, applied in the field of communications, can solve the problems of poor scalability, aggravating the burden of NAT equipment, and unrealistically frequently upgrading software for carrier-level equipment, so as to reduce the processing burden and ensure normal operation.

Active Publication Date: 2012-05-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There are some disadvantages of using ALG over NAT, especially on carrier-grade NAT (CGN)
The processing of ALG is for specific applications. If a new application needs to be supported, the software needs to be upgraded. The scalability is poor, and frequent software upgrades for carrier-class equipment are not realistic.
Furthermore, ALG is generally implemented by software, which performs in-depth processing on application protocols, which increases the burden on NAT devices.

Method used

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  • Protocol message transmission method, home gateway and CGN (carrier grade network switch) device
  • Protocol message transmission method, home gateway and CGN (carrier grade network switch) device
  • Protocol message transmission method, home gateway and CGN (carrier grade network switch) device

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Embodiment Construction

[0044] In this embodiment, the ALG is disabled on the CGN device, and the PCP protocol is used to replace the ALG on the home gateway for processing. The home gateway includes: PCP client unit and ALG proxy unit. The CGN equipment in the operator's network includes: a PCP server unit, an ALG unit and a NAT unit.

[0045] The ALG agent unit of the home gateway is used to listen to and analyze the protocol message sent by the application client that needs to be processed by ALG; apply for an external address and an external port on the PCP client unit of the home gateway according to the information resolved to the internal address and internal port ; Replace the information of the internal address and internal port in the protocol message with the applied external address and external port information; send the modified protocol message.

[0046] The PCP client unit of the home gateway is used to receive the external address and external port allocation request of the ALG prox...

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PUM

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Abstract

The invention discloses a protocol message transmission method, a home gateway and a CGN (carrier grade network switch) device. The method comprises steps as follows: the home gateway monitors a protocol message and parses the information of an internal address and an internal port in the load of the protocol message, and applies to the CGN device for an external address and an external port; and after receiving the information of the external address and the external port returned by the CGN device, the home gateway replaces the information of the internal address and the internal port in the load of the protocol message with the information of the external address and the external port, and forwards the protocol message through the CGN device. The invention realizes the ALG (application layer gateway)-like processing on the home gateway, generates the ALG type mapping entry on the CGN device based on PCP (peercast protocol), and closes the ALG function on the CGN device so as to relieve the processing burden of the CGN device.

Description

technical field [0001] The invention relates to the communication field, in particular to a protocol message transmission method, a home gateway and a carrier-level network conversion device. Background technique [0002] Network Address Translation (NAT) is a wide area network (WAN) access technology. It is a conversion technology that converts private (reserved) addresses into legal IP addresses. It is widely used in various types of Internet access methods and various types of networks. NAT can solve the problem of insufficient IP addresses. [0003] The home gateway was born with the concept of home network. It is an intelligent access gateway that gathers home network devices and interconnects with the Internet. [0004] Carrier Grade Network Address Translation (CGN) is a technology for converting address information in a carrier network. With the exhaustion of IPv4 address resources, operators urgently need to solve the problem of address resources. Operators use ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/66H04L29/12
Inventor 郑坤兰光华
Owner ZTE CORP
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