Synchronous digital hierarchy ring network topology discovery method

Abstract

The invention discloses a synchronous digital hierarchy (SDH) topology discovery method. The method is characterized by comprising the following steps that: a master station sends predetermined overhead bytes to a slave station in east and west directions; the slave station receives the overhead bytes from the east and west directions and transfers the overhead bytes according to a predetermined rule; the master station sends an address confirmation command to the slave station when determining that the received overhead bytes sent by the slave station are the same in preset time, wherein the command comprises a subnet address field; and the slave station generates an internet protocol (IP) address of the slave station according to the subnet address field and the values of the overhead bytes to be sent by the slave station after receiving the command. The invention also provides a topology discovery method for a chain network. By adopting the technical scheme provided by the invention, the network can be accessed under the condition that an IP address is not required to be allocated to a network element in advance, so that the operation cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, and more particularly, to a method for discovering the topology of a synchronous digital system ring network based on overhead bytes. Background technique [0002] SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy) is a comprehensive information transmission network that integrates multiplexing, line transmission and switching functions and is operated by a unified network management system. The backbone optical transmission network based on SDH has been applied on a large scale in telecommunications, China Unicom, radio and television and other telecommunications fields. [0003] SDH ring network topology is found in many applications, such as: power network distribution automation and so on. Existing topology discovery solutions usually utilize network management channels between network elements, and implement address resolution through ARP (Address Resolution Pr...

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Problems solved by technology

However, these methods need to occupy more network management channel resources, and all need to configure IP addresses for network elements in advance before they can join the network. At the same time, these existing solutions respond slowly to changes in the network topology and cannot detect SDH ring networks in time. Topology changes in real time

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