Method and device for transfer ATM service based on IP exchanger

Abstract

Present invention relates to IP exchange based transmitting ATM service method and device. It contains identifying transparent transmission required ATM service in IP access equipment; to make ether net protocol based package processing to said ATM service and transmitting, thereby ensuring ATM service information integrality. The present invention directly bears ATM uplink interface or ATM service application user interface ATM cell on ether net, after through IP switching system, separating ether net package at outflow point or ATM service equipment entry, directly recovering as ATM cell, convenient realizing down hung ATM and ATM uplink interface application without understanding cell inner bearing format.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for transmitting ATM services based on IP switching. Background technique [0002] The evolution from ATM (Asynchronous Transfer Mode) to IP transmission mode is the current development trend of access equipment. During the development process, it is necessary to take into account the protection of the existing investment of operators, that is, to enable IP access equipment to access the original ATM access equipment. Therefore, how to support the uplink to the ATM network, and how to support the TDM (Time Division Multiplexing) service supported by the original ATM on the IP DSLAM (IP Digital Subscriber Line Access Multiplexer) are the current IP access equipment needs The main problem solved. [0003] When considering the ATM interface, the frame structure of IP access equipment is usually based on IP architecture, such as figure 1 As shown,...

AI Technical Summary

Problems solved by technology

[0010] In this solution, complex reassembly and fragmentation of packets may be required at both the ingress and egress of the IP access device, and the processing cost and complexity are relatively high. Configure the forwarding table for each user on the Internet, which wastes system resources and increases the burden on the system

Moreover, considering the diversity of ATM service formats, reassembly and slicing are easy to lose ATM information

In addition, for IP and ATM mixed service applications, and the uplink port is an FE / GE interface, it is impossible to completely transfer ATM information to the ATM service application device

[0011] Another problem obviously existing in the above-mentioned second implementation scheme is that the scalability is not strong. Once the internal format of the cell changes, reorganization or slicing cannot be supported, the ATM service will not be able to be carried out.

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