Technology Improvements in technology are expected across multiple dimensions and
are briefly described next. These improvements are primarily driven to support the
commercial applications discussed previously and, more broadly, to optimize Service
Provider networks.
?– Bandwidth The next step in Ethernet bandwidth??”in line with its increments
of 10x historically??”is 100 Gbps. Numerous demonstrations by Bell Labs, NTT, and
Evolution of Carrier Ethernet Solutions 525
so on in late 2006 have already proven its feasibility. And, in November 2006, the
IEEE 802.3 High Speed Study Group (HSSG) agreed to target 100G as the next
version of the Ethernet standard, albeit at short distances (10 km) and employing
the standard frame size and full duplex operation. It is not likely that a (full
fledged) standard will emerge for the next year or so, but some high bandwidth
applications in supercomputing and storage may consider using pre-standard versions
to accommodate the demand.
?– Distance The distance of transmission over fiber will continue to increase, and
there are already ultra-long WDM systems that can carry several thousand kilometers
at 10G and more recently over 3000 km at 40 Gbps.
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