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Preventing loss of service resulting from damage to an end user s access connection

A user and access point technology, applied in multiplexing system selection devices, digital transmission systems, electrical components, etc., can solve problems such as easy damage and difficult repair by network maintenance personnel, and achieve the effect of increasing the range

Pending Publication Date: 2009-02-25
BRITISH TELECOMM PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The connection 102 between the user's own terminal equipment at the access point 10 and the network access node 12 must be partially located in front of the user, which makes it not only particularly vulnerable to damage, but also difficult for network maintenance personnel to access for repair

Method used

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  • Preventing loss of service resulting from damage to an end user s access connection
  • Preventing loss of service resulting from damage to an end user s access connection
  • Preventing loss of service resulting from damage to an end user s access connection

Examples

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Embodiment Construction

[0029]As already described the network shown in Figure 1, with interconnected nodes 12, 13...18, and a plurality of user terminals with access connections 102, 113 connected to each access node 12, 13 10, 11. In this example, the network is an optical network, but other transmission media are also possible. All connections shown in Figure 1 are bidirectional: that is, the same optical fiber is used for transmission in both directions, typically using wavelength division multiplexing (WDM) techniques to avoid interference between the back and forth paths.

[0030] Figure 4 shows a similar network, but with the access nodes 12, 13 and access connections 102, 113 modified according to the invention.

[0031] First, as shown in FIG. 4 , in each access connection 102 , 113 a respective passive coupler 20 , 21 is inserted, which makes it possible to provide a second connection 104 , 118 to the nodes 14 , 18 respectively, each with Corresponding packaging facilities 149,189.

[00...

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PUM

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Abstract

An Ethernet access connection (102) connects a user access point (10) to an access node (12) in the network. The access connection comprises a passive coupler (20), by means of which a further access connection (104) can be provided between the user access point (10) and a second access node (14), such that data can be exchanged over each access connection (102, 104) between the user access point and the network. This duplication ensures that communication is not severed if the access connection (102) is breached. To avoid interference at the destination terminal (11) between the two resulting identical data streams, the access nodes (13, 18) giving access to the destination terminal are controlled such that only one of them forwards data to the destination access point (11), with the capability to switch to the other one in the event of a loss of connection between the access node (13) and user access point (10).

Description

technical field [0001] The present invention relates to packet data switching systems and, in particular, to means for preventing loss of service caused by disrupting an end user's access connection. It is particularly suitable for systems of the "Ethernet" type or those based on the IEEE 802.3 standard. In this specification, the term "Ethernet" includes any network that uses Ethernet or IEEE 802.3 frames, including MPLS (Multiprotocol Label Switching) networks that use Ethernet frames, and other networks that operate based on similar standards. Background technique [0002] A simple Ethernet packet data switching system is shown in Figure 1. Only two access points are shown for clarity. These access points comprise terminal equipment 10, 11, which are typically owned and on premise by the customer and which provide the interface between the customer equipment and the public network. These access points are connected to respective local nodes 12, 13 via access connection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/413H04Q11/00H04B10/03
CPCH04L12/4625H04L45/02H04Q11/0067H04L49/30H04Q2011/0083H04L12/40182
Inventor 谢哈扎德·米尔扎
Owner BRITISH TELECOMM PLC