ATM data transmission system and data transmission method

Abstract

This invention relates to data transmission network and to one ATM network structure and its data transmission method. This invention provides one ATM ring network, which divides ATM ring network points into upper and down types and when upper points are connected to core device as management points in charge for maintenance topological and dispatching materials as ring data terminal points connected to other device.

Description

technical field [0001] The invention relates to a data transmission network, in particular to a ring-shaped ATM (Asynchronous Transfer Mode) network structure and a data transmission method thereof. Background technique [0002] U.S. Patent No. 6,442,134B1 "ATM Network with Ring Architecture" (disclosure date: on August 27, 2002), describes such a ring network architecture: a plurality of nodes are connected into a ring, and on each node, a For the reverse packet ring. Each node extracts the data belonging to the node from the ring, forwards the data not belonging to the node directly, and adds the data to be sent through the node to the ring. Each node can both send data to and receive data from the two rings. [0003] When each node broadcasts to two rings to send the data accessed through the node, if the status of the two rings is normal, the node on the ring selects one of the rings to receive the data; if there is an error in one ring, then Select the ring without e...

AI Technical Summary

Problems solved by technology

[0006] 1) Since the bandwidth resources on this ring are limited, the nodes on the ring share the ring in the manner of statistical multiplexing, and the resource occupation of the bandwidth is competitive; no corresponding mechanism is adopted to ensure that the resources are reasonable Unified management and allocation; the communication traffic between such peer nodes cannot be effectively allocated, and it is not suitable for the situation where the ring is used for ATM access

[0007] 2) Since it is a closed-loop structure, each node extracts the data of its own node from the ring and forwards the data that does not belong to this node, which may cause an infinite loop of invalid data on the ring, which will affect the entire Ring performance adversely affected

[0008] 3) There is no reliable packet-level state maintenance mechanism among the nodes on the ring, so they can only rely on the underlying transmission as the basis for ring state management and maintenance. Such a structure lacks intelligence, making it difficult to maintain and manage the topology of the entire network. Difficult to extend functionality

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