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Method for protecting digital communication system

A technology of digital communication system and digital telecommunication system, applied in the direction of digital transmission system, multiplexing communication, time division multiplexing system, etc.

Inactive Publication Date: 2004-12-22
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main limitations are the power of the processor (not shown) in the controller unit, the bandwidth of the control bus 14, the efficiency of the protocols used on the control bus, and the power of the processor in the protection unit 16

Method used

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  • Method for protecting digital communication system
  • Method for protecting digital communication system
  • Method for protecting digital communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Referring now to the flowchart - Fig. 3, the known protection procedure outlined above is modified in a manner which will now be described.

[0022] Initially, protection units in a communication system are subject to a configuration process as shown in Figures 3A and 3B. During this process, and assuming that the protection unit handles its own low priority traffic, the controller unit 22 sends over the bus 24 configuration data relating to the protection unit itself. Those data may include routing data, quality of service data, and frame structure data. This is shown as block 30 in Figure 3A. Accordingly, the protection unit is provided with configuration data relating to the respective non-protection units (ie units 1 to N) in the communication system. In the illustrated flow chart, this is achieved by first setting a unit counter value M to 1 in block 32, sending a flag representing the current value M (one) to the protection unit in block 34, and then to the prot...

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PUM

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Abstract

In a method for effecting protection of a digital communications system having N communications units and K protection units, the protection units are initially set up by storing in memory in the protection units the configuration data relating to the communications units. Subsequently, when a fault occurs involving one of the communications units, it is only necessary for one of the protection units to be supplied with an indication of which communications unit is involved, upon which the protection unit accesses in memory the configuration data associated with that unit and uses those data as its own configuration data. By this means the protection unit assumes the role of the fault-related communications unit with very little delay. Once the fault has been rectified, the protection unit has its own configuration data restored and the fault-related communications unit is put back into service. The method is envisaged as finding major use in an SDH communications system employing a 1:N protection scheme.

Description

technical field [0001] The present invention relates to a method for protecting a digital communication system comprising several protection units and communication units and in particular but not exclusively to a method for protecting a digital communication system using a 1:N protection Program. Background technique [0002] A telecommunication system comprises several communication units connected to each other and / or to other systems through various network devices. exist figure 1 A very simplistic representation of a typical communication system is illustrated in . exist figure 1 Among them, SDH digital communication network 10 is connected with several communication units 12, 14, 16, 18 through a local area network (LAN) 20. Units, in turn connected to users ("hosts") or to other networks, are arranged in a ring structure 22 or along a bus 24 and one of the units 12, 16, while the units 12, 16 are in their respective Acts as a gateway device that interfaces other ...

Claims

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Application Information

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IPC IPC(8): H04L1/22H04J3/08H04J3/14H04L12/56H04L69/40H04Q11/04
CPCH04J3/14H04J2203/006H04J3/08
Inventor F·拉泽里
Owner TELEFON AB LM ERICSSON (PUBL)