Method for implementing traversing of stream control transmission protocol message to network address translation equipment

A network address translation and flow control transmission technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve the problems of lagging SCTP protocol development and application, and achieve the effect of easy implementation.

CN101834805AInactive Publication Date: 2010-09-15SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for implementing traversing of stream control transmission protocol message to network address translation equipment. The method comprises the following steps of: A, increasing a UDP (user datagram protocol) encapsulation / de-encapsulation layer at a terminal; B, encapsulating the message by the UDP encapsulation / de-encapsulation layer, and forwarding the message when the message has a UDP message header; C, forwarding the SCTP message with the UDP message header according to the UDP message by the NAT equipment (network address translation equipment); and D, judging whether the reaching message is the encapsulated SCTP message by the terminal, if the reaching message is not the encapsulated SCTP message, directly receiving the message according to a UDP message processing method; and if the reaching message is the encapsulated SCTP message, de-encapsulating the message, and then receiving the message according to an SCTP message processing method. The method can realize the traversing of the SCTP message to the NAT without modifying or upgrading the conventional NAT equipment so that the SCTP is developed and applied in the conventional IPv4 network system.
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Description

technical field

[0001] The invention belongs to the technical field of network communication, in particular to the technical field of transmission layer communication protocol. Background technique

[0002] Stream Control Transmission Protocol (SCTP) is a new transport layer protocol developed in recent years for IP networks. Based on the improvement of the protocol, it is a protocol for the purpose of transmitting messages on the IP network in cooperation with the IPv6 network protocol. SCTP is a key part of establishing high-quality communication and e-commerce applications in the IP network. In the core network equipment, SCTP is located at the transport layer and is mainly used to transmit PSTN (Public Switched Telephone Network, Public Switched Telephone Network) signaling messages and signaling messages in the IP network in the IP network, and constitute IP signaling with upper-layer users. A node of a network; also used to transmit data messages in an IP network. ...

Examples

Embodiment

[0024] figure 1 As shown, a specific embodiment of the present invention is that a flow control transmission protocol message traverses the network address translation device, and the method is:

[0025] A, between the SCTP layer of the terminal using SCTP (Stream Control Transmission Protocol) and the Internet Protocol IP layer, add UDP (User Datagram Protocol) encapsulation / decapsulation layer;

[0026] B. The UDP encapsulation / decapsulation layer is at the terminal ( figure 1 The terminal that sends the SCTP message) encapsulates the message before sending the SCTP message, so that it has a UDP message header before sending it;

[0027] In this example, the UDP encapsulation / decapsulation layer encapsulates the message before the terminal sends the SCTP message: insert a standard UDP message header in front of the SCTP message header, and the destination port of the UDP message header The domain and local port domains are filled with the corresponding port information ext...