The need for this QoS capability becomes more acute as services traverse beyond
the access part of the network and into the core, where they are often aggregated over
Commercial Solution Granularity of Bandwidth & Quality of Service Converged Transport
Copper Partially supported
Up to 10 M (Mid-Band Ethernet) in Metro
Access networks
Substantially supported
Limited to voice and data
HFC Partially supported
Up to 100 M; inherently shared bandwidth
impacts QoS
Partially supported
Voice functionality limited
PON Substantially supported
(using MPCP and DBA mechanisms)
Fully supported
WDM Substantially supported Fully supported
FSO Fully supported Fully supported
TDM Substantially supported
Three levels of CoS and hard QoS
Fully supported
SONET Marginally supported Fully supported
RPR Fully supported Fully supported
Bridging Substantially supported
Eight levels of CoS
Fully supported
MPLS Fully supported Fully supported
WiMax Partially supported Fully supported
TABLE 16.2 Support of Carrier Ethernet Attribute??”Standardized Service Support
508 Chapter 16
a common (and shared) infrastructure. Solutions that are employed in this context??”
notably MPLS, RPR, and WDM??”have better developed capabilities, whereas Bridging
is beginning to incorporate new standards-based capabilities for this purpose as well.
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