Method and apparatus for transporting client signals over transparent networks using virtual concatenation

A client, virtual-level technology, applied in the field of communication networks, can solve problems such as inefficient use of switch capacity

Inactive Publication Date: 2008-12-17
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, such a board configuration leaves 13x VC-4 bandwidth between slots (i.e. 64-(17x3)) unused, thus causing an inefficient use of switch capacity

Method used

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  • Method and apparatus for transporting client signals over transparent networks using virtual concatenation
  • Method and apparatus for transporting client signals over transparent networks using virtual concatenation
  • Method and apparatus for transporting client signals over transparent networks using virtual concatenation

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Embodiment Construction

[0016] The present invention provides dynamic protection of constant bit rate client signals in transmission networks employing enhanced virtual concatenation and enhanced link capacity adjustment scheme techniques, thereby enabling constant bit rate client signals to be transmitted over the transmission network with increased reliability send. By converting a Virtual Concatenation Group (VCG) signal into multiple VCG member signals having an aggregate bandwidth greater than the bandwidth of the VCG signal, the present invention eliminates the need for 1+1 protection of the VCG member signals in order to adequately protect the The case of a constant bitrate client signal delivered. Thus, the present invention provides improved bandwidth efficiency over existing solutions employing 1+1 protection of VCG member signals.

[0017] Figure 1 illustrates a high-level block diagram of a communication network. In the general functional model of the transmission network (such as ITU-T...

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Abstract

The invention includes a method and apparatus for transporting a client signal over a transport network using enhanced virtual concatenation (VCAT) and enhanced link capacity adjustment scheme (LCAS) techniques. A method includes provisioning, for a client signal, a virtual concatenation group (VCG) signal having a VCG signal bandwidth, converting the VCG signal into a set of VCG member signals including a plurality of working VCG member signals and at least one protection VCG member signal where the set of VCG member signals has an aggregate bandwidth greater than the VCG signal bandwidth, and propagating the client signal toward the transport network using the set of VCG member signals. The client signal is initially conveyed by the working VCG member signals, and the at least one protection VCG member signal is available to protect the working VCG member signals. The client signal may be a constant bit rate (CBR) client signal.

Description

technical field [0001] The invention relates to the field of communication networks, in particular to transmitting client signals through a transmission network using virtual cascading. Background technique [0002] The basic function of the transport network is to transparently transport client signals. Client signals can be transported across transport networks using transport containers. Direct mapping of a client signal into a transport container is not a bandwidth efficient solution if the size (ie bit rate) of the client signal does not match the size of the transport container of the transport network. A typical solution is inverse multiplexing. At the entry point of the transport network, the client signal is divided into multiple sub-signals, where each sub-signal has a size close to the size of the transport container and is mapped into a transport container. At the exit point of the transport network, sub-signals are extracted from the transport container, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/22H04L12/24
CPCH04J3/1611
Inventor U·贡雷本A·莫利娜
Owner LUCENT TECH INC
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