Competing or complementary networks?
In defining what constitutes next generation access in advance of the emergence of new applications
and services that utilise the new infrastructure, most regulators prefer to adopt a more general definition,
using a combination of minimum bandwidth and service characteristics, such as symmetry or quality of
service, which will enable enable to support of services that cannot be delivered by existing broadband
technologies to the majority of customers.
For example, OFCOM in a report on next generation access networks, defines NGA as broadband
“capable of delivering sustained bandwidths significantly in excess of those currently widely available
using existing local access infrastructures or technologies”, but OFCOM also recognises that while there
are several possible network technologies able to offer higher bandwidth, the extent to which other
networks are able to compete with wireline networks is not clear. As noted earlier, the different
characteristics of wireless and wireline technologies may make these networks suitable for the provision of
services in areas with different densities of users.
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A study by the European Regulatory Group (ERG)
focusing specifically on fibre, affirms that the roll-out of enhanced access networks is considered
DSTI/ICCP/CISP(2007)2/FINAL
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fundamental to a number of operators as they intend to deliver very high bandwidth services to their
subscribers, and considers that all the suitable technologies for enhanced access networks – available or
foreseen for the short-medium term – comprise some deployment of optical fibre.
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