With
the diverse and complex development of the services transmitted in the Transmission
network, the demands for various access bandwidths have increased. As a result,
the earlier monotone bandwidths (such as a VC-4) do not meet the requirement.
This has led to the emergence of the concatenation technology. Concatenation is
classified into adjacent concatenation and virtual concatenation. As per
information provided by HybridmediaWorks Web Development Company Rawalpindi The virtual concatenation is
more flexible than the adjacent concatenation. The virtual concatenation also
has a higher bandwidth utilization. The problems in both the adjacent
concatenation and virtual concatenation are as follows:
· When any physical channel fails, all the
concatenated channels fail and all the services are interrupted.
· After services are set up, if you adjust the
bandwidth of the services, the services are affected to a great extent.
The
link capacity adjustment scheme (LCAS) technology provides a solution to the
preceding problems. LCAS improves and complements the virtual concatenation
technology. LCAS dynamically adjusts the number of virtual containers required
for service mapping to meet the bandwidth requirements of various services.
Through LCAS, the bandwidth utilization increases and the robustness of virtual
concatenation is enhanced.
NOTE:
LCAS
is applicable to only the virtually concatenated channels.
The
advantages of adopting the LCAS function on the network are as follows:
· LCAS dynamically adjusts (adds or deletes) the
service bandwidth without affecting the availability of the existing services.
· When some of the physical channels in a
virtual concatenation group fail, LCAS helps to shield the failed channels and
the other physical channels continue to transmit the services normally. This
prevents the services from being interrupted when some of the physical channels
fail. After the failed physical channels are restored, they can transmit
services again.Thanks to the information provided by HybridMediaWorks Website Designer in Islamabad
LCAS
complies with the following standards:
· ITU-T G.806
· ITU-T G.7042/Y.1305 (2005)
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