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Transport of ether net frames over SDH network

An Ethernet, network technology, applied in the direction of network interconnection, transmission system, data exchange through path configuration, etc.

Inactive Publication Date: 2006-11-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] PDH technology is often used as an intermediate level between Ethernet LAN and SDH level or SONET for the following reasons, namely: In most cases, the distance that Ethernet allows data to be transported makes it possible to connect Ethernet directly to SDH- or SONET- level is not feasible, and the limited penetration of SDH / SONET networks

Method used

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  • Transport of ether net frames over SDH network
  • Transport of ether net frames over SDH network

Examples

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no. 1 example

[0015] figure 1 A first embodiment of a system according to the invention is shown, which system will also operate according to the method of the invention.

[0016] At a first location A, there is a first local area network LAN 110 using the Ethernet protocol. Users within the first LAN 110 at site A not only want to be able to communicate with each other, but also with users in a second Ethernet LAN at a second site, denoted B (not shown). At the intermediate site A' there is an SDH (Synchronous Digital Hierarchy) or SONET network via which site B can be reached directly or indirectly.

[0017] Due to the distance between sites A and B, it is not possible to establish direct Ethernet communication between the first and second sites. Instead, an intermediate bearer is used for transporting Ethernet frames, first between A and an intermediate site A': through one or more intermediate data bearers 140 called PDH bearers, a link called SDH is established from A to A' - Connec...

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Abstract

The invention refers to a method of transmitting Ethernet data frames from a first local area network (LAN) to a second local area network (LAN) comprising mapping Ethernet frames from the first local area network onto Plesiochronous Digital Hierarchy format via Generic Framing Procedure (GFP) and transmitting the mapped Ethernet frames via a one or multiple En streams to an optional SDH-level network. The transmission is received at the second local area network through the optional SDH-level network via one or multiple En streams-network, and the Ethernet frames are demapped from the first local area network via Generic Framing Procedure, and transmitted into the second local area network.

Description

technical field [0001] The invention relates to the transmission of Ethernet data frames from a first local area network to a second local area network. By means of the present invention, this delivery is greatly facilitated by the elimination of many intermediate steps that have been used. Background technique [0002] Local Area Networks (LANs) are a recent technology with much success, and the most widely adopted transport mechanism in LANs is Ethernet. However, as LAN / Ethernet becomes more and more popular, there is a demand from users to be able to connect Ethernet LANs to each other in different places, which are geographically separated by long distances, and users demand that The ability to establish connections between Ethernet sites more or less separated by arbitrary distances. [0003] This requirement poses problems for network operators, since Ethernet technology was not originally conceived for this use, but was intended for LAN use in the same location. On...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04J3/16H04L12/46H04L29/06
CPCH04J3/1617H04J3/1623H04L69/08
Inventor O·埃里克松A·博勒
Owner TELEFON AB LM ERICSSON (PUBL)
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