Unlock instant, AI-driven research and patent intelligence for your innovation.

Network address and protocol translating equipment and application layer gateway equipment

A technology of protocol translation and network address, which is applied in the direction of network interconnection, network connection, data exchange network, etc., and can solve the problems of inconvenient deployment of NAT-PT

Active Publication Date: 2010-09-29
CHINA TELECOM CORP LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the current NAT-PT device only supports DNS ALG, and if it wants to support FTP ALG and SIP ALG, it needs to update the NAT-PT software version, which brings great inconvenience to the deployment of NAT-PT on the operating network

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Network address and protocol translating equipment and application layer gateway equipment
  • Network address and protocol translating equipment and application layer gateway equipment
  • Network address and protocol translating equipment and application layer gateway equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0021] In the following description, certain specific details are given in order to provide a thorough understanding of the embodiments of the invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these details. In other instances, well-known structures related to networks, servers, protocols, etc. have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments of the invention.

[0022] see figure 2 , the ALG function is separated from the NAT-PT device 20 through the NAP protocol to form a separate ALG device 40 . The ALG device 40 may be dedicated to a certain service, or be a combination of multiple services. The ALG device 40 and the NAT-PT device 20 are interconnected through a standard IP protocol, and need to support both IPv4 and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Being able to communicate with one or more application layer gateway (ALG), the network address (Add) and protocol translation (NAT-PT) equipment includes devices: aiming at each dialog process, mapping maintenance device (MMD) is in use for buffering IPv4 Add and port numbers of source and destination (APNSD) associated to dialog ID as well as corresponding (Corr) IPv6 APNSD; based on IPv4 / IPv6 Add mapping info of dialog ID of the dialog belonging to Corr input data packet (DP) buffered by MMD, the IP translation device is in use for translating IP head of input DP; NAP protocol device (NAPD) is in use for communicating with ALG device; flow feature recognition device is in use for checking whether the translated DP is matched to flow feature related to one of ALG devices; if not, sending the DP normally; if yes, then NAPD forwards the DP to the matched ALG device. Responding to request of ALG device, NAPD can provide mapping info of IPv4 / IPv6 Add Corr to dialog ID.

Description

technical field [0001] The present invention generally relates to the field of network intercommunication and business intercommunication between IPv4 and IPv6, and in particular to a communication method between a network address and protocol translation (NAT-PT) and an application layer gateway (ALG) device, and a NAP (NAT-PT and ALG Protocol: NAT -PT and ALG protocol) protocol. Background technique [0002] NAT-PT technology is defined in RFC2766 and is applied to the communication between pure IPv4 network and pure IPv6 network. The NAT-PT device reserves an IPv4 address pool and an IPv6 address pool, which are respectively used to identify IPv6 nodes in the IPv4 network and identify IPv4 nodes in the IPv6 network. At the same time, for each session process, the NAT-PT device caches the source, destination IPv4 address and port number, and the 8-tuple mapping information of the source, destination IPv6 address and port number to ensure the consistency of each IPv4 / IPv6 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/56H04L12/66H04L12/46H04L29/12H04L45/52
Inventor 张浩锋解冲锋谭国权王和宇广小明王玮李振雨
Owner CHINA TELECOM CORP LTD