Unlock instant, AI-driven research and patent intelligence for your innovation.

Communications network

A technology of communication network and network, applied in the field of optical communication network

Active Publication Date: 2010-09-01
BRITISH TELECOMM PLC
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A consequence of centralizing network equipment into a smaller number of network nodes is that the network is more vulnerable to massive outage in the event that a node becomes inoperable due to some catastrophic failure (fire, earthquake, etc.)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Communications network
  • Communications network
  • Communications network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] figure 1 A schematic diagram of a conventional network architecture for improving the resilience of a PON is shown. PON 100 includes a first plurality of optical network terminals (ONTs) 10 and a second plurality of optical network terminals (ONTs) 15 . A first plurality of Optical Network Terminals (ONTs) 10 are connected to a first Optical Line Terminal (OLT) at a network node 20a via optical fibers and passive optical splitters. The first OLT 16a is then connected to the core network 40 for subsequent routing of traffic. To provide resiliency, the first plurality of ONTs is also connected to a second OLT 16b at network node 20b, which is also connected to the core network 40. Similarly, the second plurality of ONTs 15 is connected to the first OLT 16c at the second network node 20b and to the second OLT 16d at the third network node 2Od.

[0012] In the past, the first plurality of ONTs would communicate with the first OLT, but in the event of a network failure or...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A PON in which parallel optical fibre paths are arranged between dual OLTs and the ONTs, one of the optical fibre paths providing an active connection and the other optical fibre path providing a standby connection. Respective VLANs may be formed over the parallel optical fibre paths. If performance indicators, for example Ethernet continuity check messages, indicate that an ONT is no longer in communication with the OLT then data may be sent via the VLAN associated with the standby connection.

Description

technical field [0001] The present invention relates to optical communication networks, and more particularly to resilient optical communication networks. Background technique [0002] Broadband services are typically provided over traditional telephone networks using Digital Subscriber Lines (DSL). One limitation of DSL is that the maximum data rate is not very high (for example, the maximum bit rate is about 20 Mbs-1) and the available bit rate decreases as the distance between the customer and the exchange increases. Future broadband services are considered to be increasingly likely to be provided on fiber optic infrastructure using passive optical network (PON: passive optical network) architecture (D.B.Payne and R.P.Davey, "The future of fiber access systems", BTTJ, Vol. 204-4, pp104-114, (2002)). Currently, many large-scale PONs are being deployed in the world using IEEE EPON technology or FSAN / ITUBPON and GPON. One trend that has emerged is for network operators to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/46
CPCH04Q2011/0081H04L12/467H04Q11/0067
Inventor 德里克·内塞特康江辉马克·威尔金森凯文·史密斯
Owner BRITISH TELECOMM PLC